Class / Patent application number | Description | Number of patent applications / Date published |
173048000 | Adjustable to impacting device | 88 |
20080223592 | Hand-held electric power tool - A hand-held electric power tool ( | 09-18-2008 |
20080277128 | IMPACT TOOL WITH VIBRATION CONTROL MECHANISM - An impact tool is provided that can efficiently reduce the vibration resulting from the striker and that does not lead to a larger design even with the use of a counterweight mechanism. A counterweight mechanism is provided in a motion converter housing, facing the handle. The counterweight mechanism is positioned between a center of gravity of the impact tool and the grip of the handle and is positioned above the control substrate. The counterweight mechanism is equipped with a first support, a second support, a weight support member, and a counterweight. | 11-13-2008 |
20080289841 | TOOL SET FOR ASSEMBLING AN AUTOMOBILE TAPERED BEARING - A tool set for assembling an automobile tapered bearing includes a pneumatic tool, a hammering tool, bolts and plural press blocks. The pneumatic tool consists of a rod having an annular blocking surface, a sleeve fitting around the rod, a compression spring received in the sleeve and fitting round a fitting portion of the rod, and a connector threadably combined with the rod. The hammering tool consists of a grip and a connecting rod extending from the grip and provided with a female-threaded hole, and the grip has a hammering end. Each press block is formed with an annular sloped surface and an annular blocking surface. One of the press blocks is selected to combine with the rod, so a pneumatic apparatus can drive the pneumatic tool to press and shift an automobile tapered bearing in an axle insert hole smoothly. | 11-27-2008 |
20090008113 | Post Driver - A post driver has a housing of tubular form extending substantially vertically, and weight telescopically mounted within the housing for movement between an extended position raised above the housing and a lowered position. A strike pad projects from the weight to drive a post into a hole drilled in the ground. A fluid cylinder mounted within the housing extends from a lower part of the housing to the interior of the weight and is operable to raise the weight to its extended position whereby the weight can then fall to a lower position at which its strike pad engages the upper end of the post. | 01-08-2009 |
20090025948 | Percussion Device - The invention relates to a method for controlling the operation of a pressure fluid operated percussion device and to a pressure fluid operated percussion device. The method comprises influencing the shape of a stress wave by setting a suitable clearance between a transmission piston and a tool. The percussion device is provided with means for setting the clearance between the transmission piston and the tool. | 01-29-2009 |
20090065227 | Power hand tool - A power hand tool includes a housing; an electric motor mounted in the housing for provide a rotary motion; a transmission gear set is mounted in the housing and connected with the electric motor; a torsion control device having a first rotary knob, which can adjust the maximum torsion output of the transmission gear set while being turned, and a plurality of first dents formed on an internal periphery thereof; an impact device having a second rotary knob, which can switch on or off an impact motion generated on the transmission gear set while being rotated, and a plurality of second dents formed on an internal periphery thereof; and a locating device having a holder fixed to the torsion control device and a locating member mounted to the holder, the locating member having two resilient portions, each of which has a convexity engaged with the associated first dents or second dents. | 03-12-2009 |
20090065228 | POWER IMPACT TOOL - A power impact tool includes a main body accommodating a chuck at a front end portion thereof; a clutch handle for setting a torque applied to the chuck; a grip including a base portion; a free end portion; and a reinforcing connecting portion connected to the front end portion of the main body at the back of the clutch handle and to the free end portion of the grip. The reinforcing connecting portion is disposed in front of the grip; and a part protruded most forward among the reinforcing connecting portion is located directly in front of the trigger switch disposed at the base portion of the grip. A part of the reinforcing connecting portion disposed behind the clutch handle retreats backward toward the free end portion of the grip. | 03-12-2009 |
20090120656 | ACTUATION APPARATUS FOR POWER TOOL - When the mode change knob of a multi-mode hammer drill is moved to the hammer only position, an electronic sensor sends a signal to a control logic circuit. When the user then depresses the trigger mechanically closing the ON/OFF switch, the control logic circuit applies a voltage either to a holding relay or to the gate of a triac which enables the relay or triac to conduct, thus providing a parallel circuit by-passing the ON/OFF switch. Consequently, when the user releases the trigger and opens the ON/OFF switch, the parallel relay or triac maintains current flow to the motor. It can be seen that in hammer only mode the user can activate the hammer drill by simply tapping the trigger to depress it and does not need to hold down trigger during use of the hammer in operation. | 05-14-2009 |
20090126954 | Multi-mode drill with an electronic switching arrangement - A drill includes a housing with a motor coupled to an output spindle via a transmission. A mode collar can be rotatably mounted on the housing for movement that corresponds to different modes of operation. The mode collar can be coupled to an electronic switch to operate a movable member thereof. The coupling can include a switch housing including a slide member, an actuation spring member and a return spring member. The mode collar can have a cam surface and a cam follower in the form of a shift pin that moves the slide member, causing actuation of the switch. The actuation spring member provides a biasing force that is sufficient to overcome a biasing force of a switch spring member to move the movable member into the actuated position. The mode collar can also enable and disable contact between a fixed hammer member and a movable hammer member mounted around the output spindle. | 05-21-2009 |
20090126955 | Hammer drill with hard hammer support structure - A drill housing supports an output spindle comprising a material that is relatively soft. The non-rotating hammer member can be mounted around the output spindle, adjacent its forward end, and adjacent the relatively soft material of the drill housing. The non-rotating hammer member can include support slots located along its edge. Support rods that are made of a relatively hard material can extend through the support slots to support the non-rotating hammer member. A plurality of recesses can be provided in the relatively soft material of the drill housing to support the non-rotating hammer member. A hammer mode shift mechanism can be configured to move the non-rotating hammer member along the support rods between a first position corresponding to a non-hammer mode and a second position corresponding to a hammer mode. The relatively hard support rods support the non-rotating hammer member to thereby resist damage to the relatively soft material of the housing member. | 05-21-2009 |
20090126956 | Multi-mode hammer drill with shift lock - A shift bracket can be mounted on a shift rod for movement between a first, high-speed drilling mode and a second, low-speed drilling mode. Cooperating shift lock surfaces can be associated with the shift bracket and the shift rod, respectively. For example, a groove in the can create a shift lock surface on the shift rod. The shift bracket can be moved into a locked configuration where the cooperating shift lock surfaces can engage each other preventing movement of the bracket out of the high-speed drilling mode. The hammer mode can correspond to the high-speed drilling mode, but not to the low-speed drilling mode. A spring member can bias the bracket toward the locked position. An actuation member can be coupled to the shift bracket to overcome the biasing member and to rotate or perpendicularly move the bracket into an unlocked position. The actuation member can also move the shift member from the first mode to the second mode. | 05-21-2009 |
20090126957 | Multi-mode drill with mode collar - A drill includes a housing and a motor coupled to an output member by a transmission. The transmission can selectively couple the output member to an output spindle through a low speed output gear or a high speed output gear for rotating the output spindle at a first speed or a second speed, respectively. Alternatively or additionally, a low speed mode can be provided by actuating an electronic switch that limits the speed of the motor. A rotatably fixed hammer member and a rotatable hammer member can be mounted around the output spindle. A mode collar can be rotatably mounted on the, housing and around the output member for movement to positions that correspond to various mode of operation, including a low speed mode, a high speed mode, and a hammer-drilling mode. In the hammer-drilling mode, the transmission operates in the high speed mode. | 05-21-2009 |
20090126958 | Multi-mode drill and transmission sub-assembly including a gear case cover supporting biasing - A multi-mode drill can include a transmission to transfer torque from an output member of a motor to an output spindle. A transmission housing encloses the transmission in an interior cavity formed by a gear case shell and a cover plate. The cover plate can be coupled to the outer shell via screws. A static shift rod can be supported at one end by the cover plate. A shift bracket can be mounted on the shift rod and biased to a mode position by a biasing member exerting a force between the shift bracket and the cover plate. A shift pin can be supported adjacent one end by the cover plate and biased to a mode position by a biasing member exerting a force between the shift pin and the cover plate. A spindle biasing member can bias the output spindle against the cover plate. The shift pin can actuate an electronic switch. A motor housing can be coupled to the transmission housing with fasteners so that the cover fasteners are not accessible. | 05-21-2009 |
20090145617 | PORTABLE POWER DRILL WITH GEARBOX - A portable power drill or hammer drill having a housing ( | 06-11-2009 |
20090145618 | ROTARY HAMMER - Disclosed is a drill hammer ( | 06-11-2009 |
20090151966 | Switching Device For Impact Power Tool - A switching device for an impact power tool includes an input unit, a clutch unit, an output unit and a spring. The clutch unit is cooperated with the spring and located between the input unit and the output unit. The clutch unit includes a clutch disc connected to an input shaft of the input unit and a collar. The output unit includes an output shaft with struck blocks and a pounding member with striking blocks. When the collar is moved and connected with the clutch disc, the input shaft, the pounding member, the collar and the output shaft rotate simultaneously. The output shaft outputs rotation only. When the collar is moved and disengaged from the clutch disc, the input shaft drives the pounding member and the pounding member drives the output shaft to rotate. The output shaft outputs rotation with impact intermittently. | 06-18-2009 |
20090159304 | HAMMER DRILL - An intermediate shaft | 06-25-2009 |
20090194305 | POWER TOOL - A power tool has a motor, a clutch device for adjusting torque, a percussion device which has two cam discs, and two adjusting rings for selectively setting four operating modes including a “screwdriving” operating mode, an “impacting” operating mode, a “drilling” operating mode and a “percussion drilling” operating mode. One of the two adjusting rings is a torque adjusting ring operable to select one of the “screwdriving” operating mode, the “impacting” operating mode, and the “drilling” operating mode while the other one of the two adjusting rings is a percussion ring operable to selectively set “percussion drilling” operating mode. | 08-06-2009 |
20090200054 | Power tool with a rotating and/or hammering drive mechanism - A handheld power tool has a housing, a tool receptacle, a motor having a motor shaft, an intermediate shaft, an element for transmitting a rotation of the motor shaft to a rotary motion of the intermediate shaft, a drive mechanism for a tool insertable into the tool receptacle, the drive mechanism being provided with an element for converting the rotary motion of the intermediate shaft into a rotary motion of the tool receptacle and an element for converting the rotary motion into the intermediate shaft into a hammering motion of the tool receptacle, wherein the motor shaft is coaxial with the intermediate shaft, and there is an element for coupling the motor shaft to the intermediate shaft. | 08-13-2009 |
20090223690 | Impact tool - An impact tool includes: a spindle disposed in a housing; an anvil disposed in front of the spindle and rotatably supported by the housing through a metal bearing, a rear surface of the anvil having a bearing hole in which a front end of the spindle is received; an impact mechanism configured to transmit a rotation of the spindle to the anvil; an outer groove formed on an outer periphery of the anvil and opposed to the metal bearing; and a connecting opening radially extending in the anvil and connecting the bearing hole and the outer groove to provide a communication therebetween. The outer groove is formed to have a depth in the range of 3-10% of an outer diameter of the anvil, and the connecting opening opens at a rear end of the outer groove in an axial direction of the anvil. | 09-10-2009 |
20090288850 | Percussion Toggle Device of a Percussion Driller - This invention discloses a percussion toggle device of a percussion driller. It includes bottom ratchet wheel that joggles the top ratchet wheel fixed in the output main shaft of the percussion driller, the locking ring used to lock the rotating direction of bottom ratchet wheel, the ejector rod to eject the locking ring, the slide rod that works with ejector rod to make it rise or fall, the percussion button connecting the slide rod, the positioning device to fixate the position of slide rod, and the reset device that works with the positioning device to remove the position limitation by the positioning device. This invention locks the rotating direction of bottom ratchet wheel through the independent percussion button, slide rod and ejector rod. In this way, the percussion toggle and the adjustment of torque force of the percussion driller can be separated. When using the percussion button, the user can toggle their operation between percussion and torque force. The user can do the toggle operation even when the motor is working. It is convenient, safe and effective. | 11-26-2009 |
20090308626 | ELECTRIC HAND TOOL - The invention is an electric hand tool embodied as a hammer drill and/or slide hammer, with a work spindle, a striking tool, and an electric drive motor which can be connected to an intermediate shaft driving the work spindle and/or to a striking tool drive, via a transmission and coupling device. The transmission and coupling device have a transmission, and the transmission is-a multi-stage spur gear mechanism, the gears of which are shifted by axial displacement of the intermediate shaft. | 12-17-2009 |
20100000748 | Hammer drill - In a hammer drill, a coil spring is disposed rearward of a piston cylinder inside a housing so as to press the piston cylinder to an advanced position when the hammer drill operates in a drill mode, and a supporting plate is disposed at a rear end of the piston cylinder. The supporting plate includes a pair of side plates and a base portion connecting front ends of the side plates. The base portion is in contact with a rear surface of the piston cylinder, and rear ends of the side plates are in contact with a front end of the coil spring. Openings provided in the side plates are configured to hold a pin on which a connecting arm is pivoted. | 01-07-2010 |
20100000749 | Impact Wrench - The invention relates to an impact wrench having a drive motor for driving a drive shaft ( | 01-07-2010 |
20100000750 | Impact Wrench - The invention relates to an impact wrench having a drive motor for driving a drive shaft ( | 01-07-2010 |
20100051303 | HAND-HELD POWER TOOL - The invention relates to a hand-held power tool, in particular a hammer drill which has a hammer drive, a rotary drive, a switching device, and a main output element. The switching device has a slide mechanism, which is designed for switching between different operating modes. According to the invention, the slide mechanism has at least one coupling element, which in at least one operating mode is directly coupled to a coupling element, the latter being rotationally fixed to the main output element. | 03-04-2010 |
20100071923 | HYBRID IMPACT TOOL - A power tool having a rotary impact mechanism and a mode change mechanism. The impact mechanism is driven by an output member of a transmission and includes a hammer and an anvil. The mode change mechanism includes a mode collar that is movable between a first position, in which the mode collar directly couples the hammer to the transmission output member to inhibit movement of the hammer relative to the spindle, and a second position in which the mode collar does not inhibit movement of the hammer relative to the spindle. A power tool having an impact mechanism with an external adjusting member that can be moved to vary a trip torque of the impact mechanism is also provided. | 03-25-2010 |
20100096154 | HAMMER DRILL - Mode switching is reliably performed with a durable and small-sized configuration. A clutch pin ( | 04-22-2010 |
20100126745 | Impact screwdriver having a shaft locking device - The present invention provides both an impact switching function and a shaft locking function for use in an impact screwdriver. The impact screwdriver includes a housing, a motor located in the housing, a motor drive shaft driven by the motor, a hammer which can move axially and rotate around the motor drive shaft, a hammer anvil, an impact switching device and a shaft locking apparatus. The shaft locking apparatus has a mating member coupled with the hammer anvil, an engagement ring fixed to the housing and a middle member located between the mating member and the engagement ring. The shaft locking apparatus has a locked position, where the mating member is secured to the hammer anvil and also secured to the engagement ring and the housing. | 05-27-2010 |
20100186977 | MULTIFUNCTIONAL POWER TOOL - The invention related to a multi-functional power tool, comprises an housing, a motor set in the housing, a main shaft driven through the rotation of the motor, a working shaft extended outside the housing, an active impact block, which can rotate with and make axial motion with respect to the main shaft, is configured on the main shaft, a passive impact block which rotates with the working shaft and can alternatively make axial motion with respect to the working shaft is mounted on the working shaft, the active impact block rotates to drive the passive impact block through the coordination of the first end tooth set on the active impact block and the second end tooth set on the passive impact block; the power tool further includes a function shifting button which can move between the first location and the second location to alternatively limit the passive impact block's axial motion with respect to the working shaft, in this way to realize the shifting between the first function and the second function of the power tool. This function shifting mechanism features simple structure, low manufacturing cost, convenient and efficient operation. | 07-29-2010 |
20100186978 | Rotary impact tool - A rotary impact tool includes a drive power source for producing rotational power, a drive shaft driven by the rotational power supplied from the drive power source, an output shaft operatively connected to the drive shaft for receiving the rotational power, an impact mechanism operatively couplable with the drive shaft. The rotary impact tool further includes a changeover unit for changing over an impact mode in which the impact mechanism is operated and a drill driver mode in which the rotational power produced by the drive power source is transferred to the output shaft without operating the impact mechanism and a multi-stage speed reduction mechanism for transferring the rotational power produced by the drive power source to the output shaft through the drive shaft at variable speeds in at least three speed modes including a low speed mode, a middle speed mode and a high speed mode. | 07-29-2010 |
20100193206 | ELECTRIC POWER TOOL - An electric power tool includes a planetary gear reduction mechanism, a switch mechanism, an impact mechanism, a hammer mechanism, a torque fixing mechanism, and a torque adjusting mechanism. The switch mechanism includes a driving member, a first driven member, and a second driven member. A switching member is provided on the electric power tool and connected to the driving member to move it, and the driving member may drive the first driven member and the second driven member respectively to start or shut the impact mechanism and the hammer mechanism. | 08-05-2010 |
20100193207 | POWER TOOL CHUCK ASSEMBLY WITH HAMMER MECHANISM - A power tool includes a housing, a motor supported in the housing, a chuck assembly having a chuck body rotatable about a central axis in response to torque received from the motor, and a plurality of jaws supported in the chuck body. Each of the jaws includes a front portion operable to grasp a tool element and a rear portion positioned outside the chuck body. The power tool also includes a hammer mechanism operable to impart movement to the chuck assembly, in a direction parallel to the central axis, during rotation of the chuck assembly about the central axis. | 08-05-2010 |
20100206591 | MULTI-MODE DRILL WITH MODE COLLAR - A drill includes a housing and a motor coupled to an output member by a transmission. The transmission can selectively couple the output member to an output spindle through a low speed output gear or a high speed output gear for rotating the output spindle at a first speed or a second speed, respectively. Alternatively or additionally, a low speed mode can be provided by actuating an electronic switch that limits the speed of the motor. A rotatably fixed hammer member and a rotatable hammer member can be mounted around the output spindle. A mode collar can be rotatably mounted on the housing and around the output member for movement to positions that correspond to various mode of operation, including a low speed mode, a high speed mode, and a hammer-drilling mode. In the hammer-drilling mode, the transmission operates in the high speed mode. | 08-19-2010 |
20100218965 | ROTARY SWITCH - A rotary switch for shifting a switch element is disclosed. The switch includes a twist handle, a torsion spring, a rotatable actuating element and a common axis. The twist handle, the torsion spring and the rotatable actuating element are supported so as to be rotatable about the common axis. The twist handle and the rotatable actuating element are coupled with each other by the torsion spring in such a manner that a twisting of the twist handle relative to the rotatable actuating element twists the torsion spring. An eccentric is provided on the rotatable actuating element in order to convert a rotary motion of the rotatable actuating element into a shifting motion of the switch element. | 09-02-2010 |
20100282483 | ACTUATION APPARATUS FOR POWER TOOL - When the mode change knob of a multi-mode hammer drill is moved to the hammer only position, an electronic sensor sends a signal to a control logic circuit. When the user then depresses the trigger mechanically closing the ON/OFF switch, the control logic circuit applies a voltage either to a holding relay or to the gate of a triac which enables the relay or triac to conduct, thus providing a parallel circuit by-passing the ON/OFF switch. Consequently, when the user releases the trigger and opens the ON/OFF switch, the parallel relay or triac maintains current flow to the motor. It can be seen that in hammer only mode the user can activate the hammer drill by simply tapping the trigger to depress it and does not need to hold down trigger during use of the hammer in operation. | 11-11-2010 |
20100319945 | OUTPUT MODE SWITCHING APPARATUS - An output mode switching apparatus including a power unit, a hammering unit, an output shaft, a housing, and a shifting member is provided. The hammering unit includes a gasket cup, a switching ring, a spring member, a hammering seat, and a main shaft. When the power unit is not in operation, the switching ring is restricted so as to be positioned against and secured to the gasket cup. When the mains shaft is driven by the power unit to rotate, the hammering seat is carried to rotate and is applied with a restriction for restricting the hammering seat from axial movement, thus configuring an output mode of electric drill. When the shifting member is turned, the restriction applied to the hammering seat is released. The hammering blocks repetitively hammers the protrusion blocks and axially returns back to the original position, thus configuring an impact output mode. | 12-23-2010 |
20100326686 | ROTARY POWER TOOL OPERABLE IN EITHER AN IMPACT MODE OR A DRILL MODE - A rotary power tool operable in either an impact mode or a drill mode comprising a driveshaft ( | 12-30-2010 |
20100326687 | Handheld power tool - A hand-guided power tool, having a housing and a tool holder disposed on a drive shaft. The drive shaft is rotatably supported in the housing in at least one first bearing that is disposed in at least some portions in the vicinity of a face end of the housing oriented toward the tool holder. Between the first bearing and the tool holder, a detent mechanism for impact generation for the drive shaft is embodied. | 12-30-2010 |
20110011606 | IMPACT ROTARY TOOL WITH DRILL MODE - An impact rotary tool is provided that is switchable between an impact mode where the tool delivers an impacting torque on an output tool and a drill mode where the driver delivers a smooth output on an output tool. The impact rotary tool includes an impact mechanism and a hammer block that in the impact mode is movable parallel to the axis of the driver shaft and delivers reciprocating blows to rotate an anvil and in the drill mode substantially constantly engages the anvil. The impact mechanism includes a stopper that does not contact the hammer block in the impact mode and engages the hammer block in the drill mode to maintain the substantially constant contact between the hammer block and the anvil. | 01-20-2011 |
20110147024 | POWER DRILL - The invention relates to a power drill, having a tool-clamping device that is coupled to a drive motor via a drive shaft and a torque clutch equipped with a transmission element. The torque clutch has a clutch-adjusting ring that cooperates at least indirectly with at least one clamping element that exerts a prestressing force on the transmission element. An end of the drive shaft oriented toward the tool-clamping device is guided in a bearing that axially fixes the drive shaft in a drilling or screwdriving position and axially releases the drive shaft in an impact drilling position. The bearing cooperates with a bearing holder, which moves the bearing axially via a user-actuatable actuating element. According to the invention, the actuating element is coupled to an adjusting element that axially fixes the transmission element and axially releases the bearing in the impact drilling position and axially releases the transmission element and axially fixes the bearing in the drilling or screwdriving position. | 06-23-2011 |
20110155402 | Power Tool Having Lubricant Leakage Preventing Structure - A power tool includes a housing, an electric motor, a speed change mechanism, and a protrusion member. The housing defines therein a mechanism chamber. A lubricant is inserted in an interior of the mechanical chamber. The electric motor is accommodated in the housing. The speed change mechanism is disposed in the mechanism chamber and connected to the motor for shift-transmitting rotation of the motor. The protrusion member protrudes to the mechanism chamber from the housing in a protrusion direction. The protrusion member provides a communication passage that has one opening open at a leading end side of the protrusion member in the protrusion direction and another opening open to an exterior of the mechanical chamber. At least a part of the protrusion member provides the communication passage and is made from a resilient material. | 06-30-2011 |
20110174510 | POWER TOOL - A hand-operated power tool, particularly a hammer drill ( | 07-21-2011 |
20110186317 | MANUALLY OPERATED HAMMER DRILL - A manually operated hammer drill ( | 08-04-2011 |
20110247848 | Hand-Held Power Tool - A hand-held power tool, particularly a hammer drill, includes a work spindle, a hand-held power tool housing and an intermediate shaft, which is arranged in parallel to the work spindle and mounted in an axially displaceable manner for changing the operational mode, and a tooth sleeve, which is provided to transfer a torque to the intermediate shaft. The tooth sleeve is fixed in the axial direction by means of the hand-held power tool housing. | 10-13-2011 |
20110253403 | MULTI-MODE DRILL WITH MODE COLLAR - A drill includes a housing and a motor coupled to an output member by a transmission. The transmission can selectively couple the output member to an output spindle through a low speed output gear or a high speed output gear for rotating the output spindle at a first speed or a second speed, respectively. Alternatively or additionally, a low speed mode can be provided by actuating an electronic switch that limits the speed of the motor. A rotatably fixed hammer member and a rotatable hammer member can be mounted around the output spindle. A mode collar can be rotatably mounted on the housing and around the output member for movement to positions that correspond to various mode of operation, including a low speed mode, a high speed mode, and a hammer-drilling mode. In the hammer-drilling mode, the transmission operates in the high speed mode. | 10-20-2011 |
20120097408 | HAND-HELD POWER TOOL - In a hand-held power tool, in particular an impact drill driver, having a torque setting unit, a gearbox assemblage, a hammer impact mechanism, and a tool spindle, the hammer impact mechanism has a drive rotation element having a rotation axis that is disposed coaxially with at least a part of the tool spindle. | 04-26-2012 |
20120111592 | IMPACT TOOL WITH ADJUSTABLE CLUTCH - An impact tool includes a housing, a motor supported in the housing, an output shaft rotatably supported in the housing about a central axis, an impact mechanism coupled between the motor and the output shaft and operable to impart a striking rotational force to the output shaft, and a clutch mechanism coupled between the impact mechanism and the output shaft. The clutch mechanism is operable in a first mode, in which torque from the motor is transferred to the output shaft through the impact mechanism, and a second mode, in which torque from the motor is diverted from the output shaft toward a portion of the impact mechanism. | 05-10-2012 |
20120132451 | Hammer mechanism - A hammer mechanism is described as having a snap die, a tool chuck drive shaft, and an impact generating shutoff unit, which has a blocking element, which is provided for the purpose of preventing an axial displacement of the snap die. The blocking element acts on the snap die in parallel to at least one force of the tool chuck drive shaft, at least during a drilling operation. | 05-31-2012 |
20120152579 | Electric handheld machine tool - An electric handheld machine tool includes: a tool spindle driven by an electric motor; a gearing situated between the tool spindle and the electric motor; and a manually adjustable operating element which has an adjustment travel, the adjustment travel having at least two functional ranges. Upon switching over from a first functional range to a second functional range, a mechanical additional function of the gearing is mechanically connected. The operating element is configured as a part of a motor switching element for influencing the current through the electric motor. | 06-21-2012 |
20120175140 | HAND-HELD POWER TOOL - In a hand-held power tool, in particular an impact drill driver, having a gearbox assemblage, a hammer impact mechanism, and a tool spindle, the gearbox assemblage includes at least one gear stage element which is provided in order to split a power flow so as to make available different rotation speeds for an impact mode and a rotation mode. | 07-12-2012 |
20120186842 | DRILL HAMMER AND/OR CHIPPING HAMMER DEVICE - A drill hammer and/or a chipper hammer device includes a hammer mechanism having a drive unit and a transmission unit. The transmission unit transmits a drive torque from a motor to the hammer mechanism. The transmission unit includes at least one planetary drive. A drive element of the drive unit is disposed on a transmission element of the planetary drive. | 07-26-2012 |
20120193114 | MULTI-MODE DRILL WITH MODE COLLAR - A drill includes a housing and a motor coupled to an output member by a transmission. The transmission can selectively couple the output member to an output spindle through a low speed output gear or a high speed output gear for rotating the output spindle at a first speed or a second speed, respectively. Alternatively or additionally, a low speed mode can be provided by actuating an electronic switch that limits the speed of the motor. A rotatably fixed hammer member and a rotatable hammer member can be mounted around the output spindle. A mode collar can be rotatably mounted on the housing and around the output member for movement to positions that correspond to various mode of operation, including a low speed mode, a high speed mode, and a hammer-drilling mode. In the hammer-drilling mode, the transmission operates in the high speed mode. | 08-02-2012 |
20120205132 | LIGHT SINGLE-BUTTON MULTIFUNCTIONAL ELECTRIC HAMMER - A light single button multi-function electric hammer comprises a body, a motor, a rotation set assembly ( | 08-16-2012 |
20120241183 | POWER TOOL - The present invention relates to a power tool, including a housing, a motor, and a speed adjusting system decelerating the rotate rotation speed of said motor. The speed adjusting system comprises a includes an output, a main shaft connecting to the output, and a working shaft employed for adapting with corresponding working head during working. The main shaft is connected with a hammer that can move axially against the main shaft. The working shaft is connected with an anvil that rotates together with the working shaft. The hammer has first teeth, the anvil has second teeth, and the hammer drives the anvil on rotate direction through the cooperation between the first teeth of the hammer and the second teeth of anvil. The power tool also includes a clutch, which can move between the first position and the second position to optionally rigidly connect the hammer with at least one of the output and the main shaft. | 09-27-2012 |
20120255752 | STRIKING TOOL - A striking tool comprises a tool body; a motor housed in the tool body; striking action drive mechanisms which are driven by the motor and strike a tool bit; a rotational drive mechanism which is driven by the motor and causes the tool bit to rotate; an operating mode switching member which switches between a first operating mode wherein the tool bit performs the striking operation and a second operating mode wherein the tool bit performs rotational operation at a minimum; and a clutch which transmits and cuts off torque between the motor and the rotational drive mechanism. The striking tool is capable of switching between operation modes while preventing excessive reaction torque from acting on the tool body. | 10-11-2012 |
20120285712 | MODE CHANGE MECHANISM FOR A POWER TOOL - A power tool is described which has several modes of operation, such as drilling and screw driving modes. A clutch is provided with various settings for adjusting the torque at which the clutch interrupts power to a spindle. Furthermore, a two speed gearbox is provided for adjusting the speed of the spindle. All of these variables are controllable from a single adjustment member or collar thereby reducing necessary decisions needed to be made by an operator for a particular job in hand. For instance, when an operator wants the tool to operate in a screw driving mode, the gearbox is automatically set to drive the spindle at a low speed with the clutch being operable to interrupt drive when a torque force applied to the spindle exceeds a threshold value. | 11-15-2012 |
20130112446 | Handheld power tool having a drive motor operable via a manual switch - In a handheld power tool having a drive motor operable via a manual switch for driving a drive body which is associated with a mechanical percussion mechanism and coupled to a percussion member for driving an output shaft provided with a tool receptacle, and an operating mode switchover element which is designed to switch over between a normal operation and a percussion operation of the percussion mechanism and which is coupled to the drive body being associated with the drive body, an operating device is provided for operating the operating mode switchover element which is coupled to the manual switch and which is designed to enable a switchover of the operating mode switchover element between normal operation and the percussion operation of the percussion mechanism by operating the manual switch. | 05-09-2013 |
20130161041 | APPARATUS FOR TIGHTENING THREADED FASTENERS - According to a first aspect of the invention we provide an apparatus for reaction—free and reaction—assisted tightening and loosening of an industrial fastener including: a motor ( | 06-27-2013 |
20130161042 | HAND-HELD TOOL DEVICE - A hand-held tool device having at least one operating device via which the at least one first transmission ratio and one second transmission ratio and a percussion drilling mode are able to be set. The hand-held tool device has a protective device which prevents an operation in the first transmission ratio in the percussion drilling mode. | 06-27-2013 |
20130161043 | HAND TOOL DEVICE - A hand tool device includes: a striking mechanism which has a striker, a striker driving device, and a striker arresting device. In the case of a first drill rotation direction, the striker driving device is configured to propel the striker in at least a striking direction. The striker arresting device is configured to prevent the striker driving device from being operated in the case of a second drill rotation direction. | 06-27-2013 |
20130186663 | MULTI-TOOL FOR FASTENERS - The multi-tool for fasteners includes a housing, a power device, a transmission device coupled to the power device, an output device coupled to the transmission device, and a switching device that can be switched between at least two operating modes. In a first operating mode, the output device moves in a reciprocating manner without rotation along an axial direction. In a second operating mode, the output device rotates with an intermittently increasing torque about a circumferential direction. The switching device may include a limiting member and the limiting member can be moved between a first position and a second position. Further, in the first position the output device is in the first operating mode, and in the second position the output device is in the second operating mode. | 07-25-2013 |
20130306341 | HYBRID IMPACT TOOL - A power tool having a rotary impact mechanism and a mode change mechanism. The impact mechanism is driven by an output member of a transmission and includes a hammer and an anvil. The mode change mechanism includes a mode collar that is movable between a first position, in which the mode collar directly couples the hammer to the transmission output member to inhibit movement of the hammer relative to the spindle, and a second position in which the mode collar does not inhibit movement of the hammer relative to the spindle. | 11-21-2013 |
20130319707 | POWER DRILL - The invention relates to a power drill, having a tool-clamping device that is fastened to a spindle shaft, having a torque clutch that includes an axially movable clutch plate on which an axial force is exerted by a plurality of compression springs that cooperate at least indirectly with an adjusting nut situated on a housing component. The compression springs are accommodated in first recesses embodied in the longitudinal direction of the housing component. A device for axially moving an axial bearing situated on the spindle shaft, is provided at the end of the spindle shaft oriented toward the tool-clamping device. According to the invention, on its side oriented toward the clutch plate, the device for axially moving the axial bearing has at least one actuating section that is situated in a second recess of the housing component and on the side oriented toward the clutch plate, cooperates with an adjusting element for the device. | 12-05-2013 |
20130333907 | HAND-HELD POWER TOOL - A hand-held power tool having hammer-drilling, drilling and screwing modes, including a mode-setting device having an actuating element, a setting element, and a gear unit for driving an output shaft, in which the actuating and setting elements are interconnected in a rotatably fixed manner, and, in an operating mode(s), the setting element is coupled to a transmission element supported at a coupling housing assigned to the gear unit and axially displaceable at the coupling housing in a screwing position associated with the screwing mode and is axially fixed in position at the coupling housing in hammer-drilling and drilling positions of the corresponding modes; the transmission element is connected to the coupling housing in a rotatably fixed manner, a predefined operating mode being settable by rotating the setting element; the setting and transmission elements being rotatable relative to one another, the setting element embracing at least sections of the transmission element. | 12-19-2013 |
20140054056 | HANDHELD POWER TOOL - A handheld power tool has a switchable gear component actuatable by a selector switch. The gear component moves from a first operating position into a second operating position. The selector switch has a first switching position associated with the first operating position and a second switching position associated with the second operating position, and movable so that intermediate positions are assumed. A traveling coupling between the selector switch and the gear component has a spring exerting force onto the gear component in the first direction. A locking bolt is coupled to the selector switch in a positively driven manner. In the intermediate positions, the locking bolt is moved into a blocking bolt position blocking movement of the gear component out of the first operating position into the second operating position. When the selector switch is in the second switching position, the locking bolt is in a releasing bolt position. | 02-27-2014 |
20140054057 | ROTARY HAMMER - A rotary hammer is adapted to impart axial impacts to a tool bit. The rotary hammer includes a motor, a spindle coupled to the motor for receiving torque from the motor, and a piston at least partially received within the spindle for reciprocation therein. A crank hub is coupled to the motor for receiving torque from the motor. The crank hub defines a rotational axis and includes a socket offset from the rotational axis. A pin includes a first portion at least partially received within the socket and a second portion fixed to the piston. The first portion of the pin is both pivotable within the socket and axially displaceable relative to the socket in response to rotation of the crank hub for reciprocating the piston between a forward-most position within the spindle and a rearward-most position within the spindle. | 02-27-2014 |
20140110140 | HAMMER DRILL - A hammer drill includes a housing, a first ratchet fixed to the housing, a spindle rotatably supported by the housing about an axis, and a second ratchet coupled for co-rotation with the spindle. The second ratchet is engageable with the first ratchet in response to rearward displacement of the spindle to impart a hammering action on the spindle. The hammer drill further includes a thrust bearing having an arm extending away from the axis, and a selector ring having a post extending toward the arm. The selector ring is rotatable between a first position in which the post is engageable with the arm to limit the rearward displacement of the spindle and prevent engagement of the first and second ratchets, and a second position in which the post is misaligned with the arm to permit the rearward displacement of the spindle and engagement of the first and second ratchets. | 04-24-2014 |
20140138111 | IMPACT TOOL - It is an object of the invention to provide an improved impact tool in which a biasing member is not affected by dust. | 05-22-2014 |
20140144657 | OPERATION MODE SWITCHING MECHANISM - An operation mode switching mechanism for use with a power tool disclosed in the present invention includes a torsion unit, a switching unit, a clutch member, a power output member and an output shaft, where the switching unit can be switched between three rotating positions and one impact position. When the switching unit is at one of the rotating positions (screw symbols), the output shaft is driven to rotate by a carrier plate; and when switching unit is switched to the impact position (impact symbol), the output shaft is pushed by the clutch member so as to disengage from the carrier plate and is driven by a planet plate. The clutch member also restricts the direction of motion of the output shaft in the impact position, so the output shaft moves back and forward to generate reciprocating impact output. | 05-29-2014 |
20140209339 | POWER DRILL - The invention relates to a power drill, having a tool-clamping device that is coupled to a drive motor via a drive shaft and a torque clutch equipped with a transmission element. The torque clutch has a clutch-adjusting ring that cooperates at least indirectly with at least one clamping element that exerts a prestressing force on the transmission element. An end of the drive shaft oriented toward the tool-clamping device is guided in a bearing that axially fixes the drive shaft in a drilling or screwdriving position and axially releases the drive shaft in an impact drilling position. The bearing cooperates with a bearing holder, which moves the bearing axially via a user-actuatable actuating element. According to the invention, the actuating element is coupled to an adjusting element that axially fixes the transmission element and axially releases the bearing in the impact drilling position and axially releases the transmission element and axially fixes the bearing in the drilling or screwdriving position. | 07-31-2014 |
20140262394 | IMPACT TOOL - An impact tool includes a housing, a motor having an output shaft defining a first axis, a drive shaft rotatably supported by the housing about a second axis oriented substantially normal to the first axis, and an impact mechanism coupled between the motor and the drive shaft and operable to impart a striking rotational force to the drive shaft. The impact mechanism includes an anvil rotatably supported by the housing and coupled to the drive shaft, and a hammer coupled to the motor to receive torque from the motor and impart the striking rotational force to the anvil. The impact tool also includes a locking mechanism operable to selectively lock the drive shaft relative to the housing. | 09-18-2014 |
20140338940 | CLUTCH AND HAMMER ASSEMBLIES FOR POWER TOOL - A power tool includes a tool housing, an output spindle, a motor received in the tool housing, a transmission coupled to the motor and configured to transmit torque from the motor to the output spindle, a clutch assembly, and a hammer assembly. The clutch assembly includes a clutch mechanism configured to interrupt torque transmission from the transmission to the output spindle when an output torque exceeds a threshold, and a clutch housing composed of a non-metallic material and supporting at least a portion of the clutch mechanism. The hammer assembly includes a hammer mechanism configured to apply axial impacts to the output spindle when the hammer mechanism is engaged, and a hammer housing composed of a heat conductive material and supporting at least a portion of the hammer mechanism. The hammer housing is at least partially disposed inside of a portion of the clutch housing | 11-20-2014 |
20140338941 | HAND POWER TOOL COMPRISING A SPINDLE LOCK DEVICE - A hand power tool includes a drive spindle, a mechanical impact mechanism, and a spindle lock device. The mechanical impact mechanism has an impact body having at least two drive cams. The spindle lock device has a spindle roller carrier disposed on the drive spindle. At least two spindle rollers are disposed on the spindle roller carrier. The spindle lock device is connected via a coupling member to the mechanical impact mechanism. The coupling member is disposed between the impact body and the spindle roller carrier, in the axial direction of the drive spindle. The coupling member is configured to effect rotary driving of the spindle roller carrier, upon rotary driving by the impact body, when the hand power tool is in a normal mode. | 11-20-2014 |
20150014009 | Hammer Drill - A hammer drill comprises a motor including an output shaft, a shaft assembly rotationally engaged therewith, a hollow spindle, and a hammer mechanism comprising a piston arranged for reciprocating motion within the spindle. The shaft assembly comprises a first part carrying a first gear engaged with a gear on the spindle to cause spindle rotation, a second part carrying a crank member to cause piston reciprocation, and a connecting part configured to rotationally interconnect, or disconnect, the first and second parts. In a first position of the connecting part only one of the first and second parts is rotationally engaged with the output shaft to enable rotation of only one of the first gear and the crank member respectively, while in a second position both the first and second parts are rotationally engaged with the output shaft to enable rotation of both the first gear and the crank member. | 01-15-2015 |
20150075828 | HANDHELD TOOL DEVICE - A handheld tool device includes a hammer mechanism that has at least a striker and a cam guide that drives the striker at least in a hammer-drilling mode. The striker has at least a portion of the cam guide. | 03-19-2015 |
20150083451 | POWER TOOL - A power tool having an impact mechanism part using a hammer | 03-26-2015 |
20150129268 | HAND-HELD POWER TOOL DEVICE - A hand-held power tool device is described which includes an output unit, a striker, and a rotary percussion receiver which is designed for establishing a transfer of rotary percussions between the striker and the output unit, at least during a rotary percussion operation. It is provided that the hand-held power tool device includes a rotary percussion switch-off device which is designed for interrupting the transfer of rotary percussions from the striker to the rotary percussion receiver, at least during a hammer percussion operation. | 05-14-2015 |
20150367490 | POWER TOOL - A power tool, which transmits a rotational force of an intermediate shaft to a tool bit, is provided with a gear which converts the rotational force of the intermediate shaft into a striking force in a rotation direction and transmits the striking force to the tool bit, an impact sleeve, a ball, a hammer, a cylinder, a gear which does not convert the rotational force of the intermediate shaft into the striking force in the rotation direction, a sleeve, a cylinder, a motion conversion mechanism for converting the rotational force of the intermediate shaft into a striking force in a linear motion direction and transmits the striking force to the tool bit, a piston, a striker, an intermediate member, a clutch for switching the transmission paths of the rotational force of the intermediate shaft and a slide gear. | 12-24-2015 |
20150375376 | HAND TOOL IMPACTING DEVICE WITH FLOATING PIN MECHANISM - A hand tool impacting device may include, a drive shaft with an aperture, an impaler disk, and a floating pin positioned within the aperture of the drive shaft. A set of circular ramps on the outer edge of the impaler disk may interact with a stationary pin insert to translate the drive shaft and create an impacting motion. A pair of springs placed against either side of the floating pin may allow a specialized tool bit to engage or disengage the impaler disk, thereby allowing selective use of translational impacting motion, or rotational torque. An impact bit for engaging the impaler disk may include, a tool head configured to engage a work piece and a tool shaft configured to be inserted into a hollow drive shaft to engage a floating pin. According to one embodiment, the impact bit includes a number of sleeves to guide the tool head during operation. | 12-31-2015 |
20150375387 | TORSION OUTPUT TOOL - A torsion output tool has a housing, a motor and a transmission assembly. The transmission assembly includes a first planetary gear train. The first planetary gear train has a first planetary gear carrier, a first level planetary gear, a first inner ring gear disposed outside the first level planetary gear and meshing therewith, and a first central wheel sliding in a direction of a first axis to a first position and a second position. The transmission assembly further has a locking member. The locking member slides synchronously with the first central wheel and only locks the relative circumferential positions of the output shaft and the first planetary gear carrier when the first central wheel is at the first position and only constitutes circumferential engagement with the first planetary gear carrier when the first central wheel is at the second position to achieve a drilling mode and an impact mode of operation for the tool. | 12-31-2015 |
20160023344 | Mode Change Knob Assembly - A knob assembly for a power tool comprising: a knob having a slot and knob recess, the slot and knob recess intersecting each other at an intersection within the knob; a latch slideably mounted within the slot; a peg located within the knob recess; wherein the peg and latch engage with each other via the intersection in order for the peg to retain the latch within the slot and for the latch to retain peg within the knob recess. | 01-28-2016 |
20160052118 | HYBRID IMPACT TOOL - A power tool having a rotary impact mechanism and a mode change mechanism. The impact mechanism is driven by an output member of a transmission and includes a hammer and an anvil. The mode change mechanism includes a mode collar that is movable between a first position, in which the mode collar directly couples the hammer to the transmission output member to inhibit movement of the hammer relative to the spindle, and a second position in which the mode collar does not inhibit movement of the hammer relative to the spindle. | 02-25-2016 |
20160107303 | Pneumatic Hammer - A pneumatic hammer has a conversion mechanism with a rotatable input member coupled to the motor and adapted to convert a rotational movement of the input member into a reciprocating movement of an output member. The input member is formed as a first carrier which supports a first planet gear. A first sun gear is coaxially arranged with the first carrier, and is rotatingly driven by the drive motor. A first ring gear is movable parallel to the first axis of rotation between a first position and a second position. A second gear is rotatable around a second axis of rotation parallel to the first axis of rotation. The second gear meshingly engages with the first ring gear when the first ring gear is in the second position, and is disengaged from the first ring gear when the first ring gear is in the first position. | 04-21-2016 |
20160129577 | HAND-HELD POWER TOOL - A hand-held power tool, in particular an impact drill driver, has a gearbox assemblage, a hammer impact mechanism, and a tool spindle. The hammer impact mechanism includes a striker that at least partly surrounds the tool spindle in at least one plane. | 05-12-2016 |
20160158929 | Hand-held power tool which includes a torque clutch - In a hand-held power tool, including a screwdriver or screw drill, which includes a gear, in a gear housing, for driving an output spindle, and a torque clutch associated with the output spindle, a transmission element which is axially displaceable in the direction of a longitudinal center axis of the output spindle, a locking element, which is axially immovable in the direction of the longitudinal center axis and which is movable in a plane transverse to the longitudinal center axis, for activating and deactivating the torque clutch, the locking element enabling, in at least a first operating position, axial displaceability of the transmission element in the direction of the longitudinal center axis to activate the torque clutch, and in at least a second operating position, for at least limiting the axial displaceability of the transmission element to deactivate the torque clutch, in the second operating position of the locking element, the output spindle being at least essentially axially immovable relative to the gear housing in the direction of the longitudinal center axis. | 06-09-2016 |
20160167212 | ROTARY HAMMER | 06-16-2016 |
20180021931 | IMPACT TOOL | 01-25-2018 |