| Entries |
| Document | Title | Date |
|---|
| 20080250887 | Ball Screw Mechanism and Assembling Method of the Same - Since it is configured that an female screw groove | 10-16-2008 |
| 20080302197 | Ball screw device having bearing spacer - A ball screw device includes a ball nut having an inner thread formed by a number of helical groove portions for forming an endless ball rolling passage in the ball nut and for receiving a number of bearing members, and an endless spacer moving passage formed in the ball nut and communicating with the endless ball rolling passage of the ball nut for receiving a number of bearing spacers which are engaged between the bearing members for spacing the bearing members away from each other and for preventing the bearing members from striking onto each other. The bearing spacers may be spherical bearing spacers, and made of synthetic materials. | 12-11-2008 |
| 20080314179 | Roller Transmission and Gearing Mechanism - A roller transmission and gearing mechanism with a driving body, roller means and a driven body, wherein the driving body is coupled to the driven body by means of the roller means, the bodies are guided with a single degree of freedom, and define respective roller guide tracks thereon, the tracks contact the roller means and determine the movement of the roller means, which contact the roller guide tracks along rolling curves, the roller guide tracks start and terminate at respective pairs of limit surfaces, and the roles of the driving and driven bodies can be interchanged, furthermore the distances between points of the rolling curve on the driving body and on the driven body are different, the rolling means move with pure rolling motion, and for all contacting point-pairs on the rolling curves the respective tangential planes are parallel to each other, the velocities of the contacting pairs of points are identical but have opposite signs, in the contacting points the action lines of forces intersect the central axes of the roller means, and the lengths of the rolling curves of the driving and driven bodies are equal, and before and after the contact points the rolling curves have angularly inclined tangential planes. | 12-25-2008 |
| 20090007710 | BALL SCREW - A ball screw in which surface hardness of balls is higher than both of surface hardness of a ball screw groove of a screw shaft and surface hardness of a ball screw groove of a nut, and a solid lubricant film is formed on a surface of the balls with a thickness of 1 μm or more and 5 μm or less. Further, cross-sectional shape of grooves | 01-08-2009 |
| 20090071278 | Ball screw device having image sensor - A ball screw device includes a number of bearing members received between a ball nut and a screw shaft, and an image device engaged into the bore of the ball nut, and directed toward the screw shaft but spaced from the screw shaft for taking an image of the screw shaft and for viewing a changing of the inner thread of the screw shaft and for allowing the users to change or to replace the worn out ball nut and/or the worn out screw shaft and/or the worn out bearing members right away or at the best time. A processor device may be coupled to the image device for processing the images taken by the image device. A displayer may display the images, and a warning device may generate a warning signal when the screw shaft has been worn out. | 03-19-2009 |
| 20090133523 | Error-compensating bearing screw conveying device - The present invention relates to an error-compensating bearing screw conveying device including: a screw shaft having a screw mounted along the outer circumferential surface thereof; a nut body adapted to fittedly insert the screw shaft thereinto along the inner circumferential surface thereof and having a plurality of mounting holes formed along the outer circumferential surface thereof in such a manner as to conform to a spiral passageway formed on the screw of the screw shaft; and a plurality of radial bearings mounted in the mounting holes of the nut body and adapted to be rotated at the fixed positions thereof in such a manner as to come into contact with the outer circumferential surface of the screw of the screw shaft along the outer races thereof when the screw shaft or the nut body is rotated; and position-adjusting means mounted on the top sides of the radial bearings so as to adjust the positions of the radial bearings in such a manner as to be oriented toward the center of the screw shaft. | 05-28-2009 |
| 20090193920 | Ball screw unit - A housing has a screw shaft passing wall in which a through hole, through which a screw shaft passes, is formed. A spline outer cylinder is held at one end by the screw shaft passing wall, and a disc spring that biases the spline outer cylinder toward the screw shaft passing wall is arranged at the other end of the spline outer cylinder. A tapered recess is formed in one end face of the spline outer cylinder, and a tapered projection that is fitted in the tapered recess is formed in a face of the screw shaft passing wall of the housing, which faces the spline outer cylinder. | 08-06-2009 |
| 20090260468 | STEERING DEVICE AND MOVEMENT CONVERTING DEVICE USED THEREFOR - Provided is a novel steering device which can be formed to be compact, which is easily applicable to a vehicle with a small engine room such as a front-engine/front-drive car, and which is of neither the ball nut type nor the rack and pinion type. The steering device operates steerable wheels by converting rotation of a steering shaft to axial movement of a relay rod, the steering device including: a gear casing through which the relay rod is passed; a spiral ball rolling groove provided in the relay rod within the gear casing so as to exhibit a lead of a magnitude of 1 or more; a nut member threadedly engaged with the ball rolling groove of the relay rod through an intermediation of a large number of balls and supported rotatably with respect to the gear casing; an input shaft to which rotation of the steering shaft is transmitted and which is in an intersecting or offset relationship with the relay rod; and a first transmission gear for transmitting rotation of the input shaft to the nut member. | 10-22-2009 |
| 20100180706 | Roller Screw Structure - A roller screw structure comprises a nut, a screw and a rolling assembly. The rolling assembly is movably disposed between the nut and the screw and includes at least one rolling cone. The slantwise rolling surface of the rolling cone contacts the spiral groove surfaces of the nut and the screw in a line-to-line manner, and the angle between the rolling surface and the self-rotation axis of the rolling cone is from 0 degree to 6.3 degrees. Thereby, making the distance between the self-rotation axis and the rolling surface of the rolling cone of the rolling assembly different can prevent the occurrence of speed difference caused at different rolling paths of the rolling assembly. | 07-22-2010 |
| 20100206113 | LINEAR MOTION DEVICE WITH PARTIALLY SUPPORTED ROLLING SURFACE PART - A linear motion device has a first assembly and a second assembly, at least one first rolling surface that extends in a longitudinal direction and provided on the first assembly, the first rolling surface being located opposite a second rolling surface which is provided on the second assembly, a row of rolling elements that circulate endlessly in the first assembly is located between the first and second rolling surfaces, and at least one central longitudinal section of the first rolling surface is designed such that the rolling elements are at least partially relieved of the load. The first rolling surface is provided on a separate first rolling surface part in the form of a profiled element having a substantially constant cross-sectional shape, the first rolling surface part is situated in a central longitudinal section at a distance from a first body of the first assembly, and is supported on the first body on both sides in the longitudinal direction next to the central longitudinal section. | 08-19-2010 |
| 20100206114 | BALL SCREW WITH BALL SPLINES - A ball screw with ball splines is provided which eliminates a fear that balls within a screw groove override spline grooves. | 08-19-2010 |
| 20100251845 | BALL NUT - A ball nut of a ball screw drive, in which the ball nut is mounted on a threaded spindle via balls. The ball nut has on its inner circumference a ball groove wound helically around an axis that extends over at least one winding, and a deflection body, with deflection ends, arranged on a circumferential face of the ball nut. The deflection ends engage into a recess of the ball nut, and adjoin an end and a start of the ball groove. The deflection body is supported on one side in radial directions and on the other side on a machine part. The deflection body is connected at its axial ends to bearings for mounting on the machine part. The bearings, which project circumferentially, engage into the recesses of the ball nut and are arranged with their bearing faces approximately flush with the outer circumferential face of the ball nut. | 10-07-2010 |
| 20100275710 | Ballscrew with an integral high-efficiency thrust bearing - A linear actuator includes a thrust bearing that is integral to the actuation member. The actuator includes a translation member and an actuation member. The actuation member is responsive to a drive force to rotate. The translation member is configured to translate in response to actuation member. The thrust bearing is coupled to the actuation member and includes an inner race, an outer race, and a plurality of balls. The thrust bearing is configured as a zero lead ballscrew, with the inner race integrally formed on the actuation member, and the plurality of balls disposed between the inner and outer races. | 11-04-2010 |
| 20100275711 | BALL SCREW DEVICE - A ball screw nut, into which a ball screw shaft is screwed, is coupled with a first cylindrical member disposed in a periphery of the ball screw shaft so as not to rotate with each other. The ball screw nut and the first cylindrical member are rotatably supported on a second cylindrical member by way of balls arranged so as to form two rows. One end portion of the ball screw nut is spline-fitted with one end portion of the first cylindrical member. Two rows of ball bearing raceways are formed on an outer peripheral face of the ball screw nut. | 11-04-2010 |
| 20100282011 | ROLLER SCREW AND METHOD OF CIRCULATING ROLLERS IN ROLLER SCREW - There is provided a roller screw in which a twisted amount of an unloaded return path is reduced. | 11-11-2010 |
| 20100307271 | Double teeth ball screw apparatus - A double teeth ball screw device includes an elongated screw shaft and a ball nut each having two parallel helical grooves aligned with each other for forming two parallel ball guiding passages between the screw shaft and the ball nut, the ball nut includes two parallel and axially and oppositely extended channels communicative with the ball guiding passages for forming an endless multiple-turn, helical raceway between the screw shaft and the ball nut and for receiving a number of ball bearing members and for facilitating the sliding movement between the screw shaft and the ball nut, a deflecting device is attached to the ball nut for communicating the ball guiding passages with the channels of the ball nut. | 12-09-2010 |
| 20110100143 | Ball Screw and Nut Assembly - A ball screw and nut mechanism includes a screw having helical grooves with helical ridges therebetween. A nut is formed from at least two portions and has complementary grooves which in combination with the screw grooves define raceways for at least one closed loop of rolling balls. The nut defines at least first and second seams between the two nut portions. The rolling balls circulate in a closed loop to enable the screw to translate in a linear manner relative to the nut. In the region of at least one seam, the grooves in the nut portions are configured so as to at least partially unload the balls as they roll past the seam. | 05-05-2011 |
| 20110120247 | BALL SCREW, IN PARTICULAR FOR A PARKING BRAKE OF A MOTOR VEHICLE - A ball screw which has a threaded nut arranged on a threaded spindle, a helical ball channel in which balls are arranged delimited by ball grooves of the threaded spindle and the threaded nut, a ball cage which receives the balls and a spring element which hears with one end against the threaded nut and with another end against the ball cage. The spring element is arranged axially adjacent to the ball cage in an annular gap delimited by the threaded nut and the threaded spindle. | 05-26-2011 |
| 20110138948 | COAXIAL SCREW GEAR SLEEVE MECHANISM - An improved mechanism for expanding or lifting a device in accordance with various embodiments of the present invention is a coaxial screw gear sleeve mechanism. In various embodiments, coaxial screw gear sleeve mechanisms includes a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing a device utilizing such a mechanism to expand or lift between a collapsed configuration and an expanded configuration. | 06-16-2011 |
| 20110146436 | BALL RECIRCULATION FOR A BALL SCREW - An internal ball recirculation insert for a ball screw assembly. The ball screw assembly having a ball nut with at least one radial bore though it, a ball screw and load bearing balls. The ball screw and ball nut having complimental helical grooves, forming helical ball raceways when the ball screw and ball nut are assembled. The internal ball recirculation insert sized to fit into the radial bore of the ball nut, having a body portion, securing arms, a ball channel for channeling balls from one ball raceway to another and a friction or retention device around the circumference of the body portion. The friction device extending outwardly from a side wall of the recirculation insert, and contacting a wall of the radial bore in the ball nut. | 06-23-2011 |
| 20120073396 | MOTION GUIDE DEVICE AND SCREW DEVICE - Provided are a motion guide device and a screw device each having a cover for protecting the device against moisture, such as coolant, and powder dust. The motion guide device has a raceway member | 03-29-2012 |
| 20120096967 | ROLLER SCREW - A roller screw includes a long shaft, a screw nut sleeved onto the long shaft, and rollers, a turnaround member and a turnover member set in between the long shaft and the screw nut. The turnaround member enables the rollers to circulate. The turnover member defines a turnover passage extending over the peripheral surface of the long shaft and connected between two load paths in the long shaft and the screw nut to constitute a circulation path. The direction of arrangement of the rollers before entering the turnover passage is different from that after moving out of the turnover passage so that the amount ratio of the rollers that are arranged in two different directions is kept constant for industrial application. | 04-26-2012 |
| 20120180588 | BALLSCREW ASSEMBLY - Improved ballscrew assemblies are disclosed herein. For example, a ballscrew assembly may comprise a ballscrew having an axially distributed ballscrew groove about a circumference of the ballscrew, an extended top plate having an axially distributed extended top plate groove, and an axially distributed thrust bearing disposed in a space bounded by the axially distributed ballscrew groove and the axially distributed extended top plate groove. | 07-19-2012 |
| 20120192667 | BALL SCREW WITH A CIRCULATING ASSEMBLY - A ball screw with a circulating assembly is disclosed. The circulating assembly of the ball screw is divided into a first circulating block and a second circulating block and can be assembled on the ball screw in such a method that the first and the second circulating blocks are assembled separately, so that the circulating assembly is applicable to the screw shaft whose helical groove doesn't extend to the shoulder portion thereof. In addition, the circulating assembly is limited in terms of an angle, and the relation between the first circulating block and the second circulating block is especially limited, so that the ball screw is applicable to the nuts with smaller outer diameter. Hence, the ball screw can be applied to both the nuts with smaller diameter and the screw shafts whose helical groove doesn't extend to the shoulder portion thereof. | 08-02-2012 |
| 20130186224 | BALLSCREW ASSEMBLY - A ballscrew assembly may comprise a ballscrew having an axially distributed ballscrew groove about an interior circumference of the ballscrew, an extended top plate having an axially distributed extended top plate groove disposed on an outer circumference of the extended top plate, and an axially distributed thrust bearing. Further, a ballnut assembly may comprise a ballnut having an axially distributed ballnut groove about an interior circumference of the ballnut, an extended top plate having an axially distributed extended top plate groove disposed on an outer circumference of the extended top plate, and an axially distributed thrust bearing. Further still, a ballnut assembly may comprise a ballnut having an axially distributed ballnut groove about an outer circumference of the ballnut, an extended top plate having an axially distributed extended top plate groove disposed on an interior circumference of the extended top plate and an axially distributed thrust bearing. | 07-25-2013 |
| 20140013887 | BALL SCREW WITH A DUST-PROOF AND LUBRICATING DEVICE - A ball screw with a dust-proof and lubricating device comprises: a screw, a nut, a plurality of balls, an oil-absorbing member, a return unit, and two dust-proof members. The nut includes an axial oil-guiding hole, a plurality of radial oil holes in communication with the oil-guiding hole and the helical groove of the nut, and an oil-feeding hole in communication with one of the radial oil holes. The oil-absorbing member is disposed in the oil-guiding hole and the radial oil holes. The return unit is disposed in the nut to enable the turning and circulation of the balls. The two dust-proof members are located at both ends of the axial hole. The ball screw can still be lubricated when it is disposed in a vertical position, and the dust-proof and lubricating device which won't add axial length to the nut. | 01-16-2014 |
| 20140352470 | BALL SCREW ASSEMBLY AND WIPER - A wiper for screwing on a rolling groove of a screw shaft includes a ring and a plurality of wiping protrusions extended from the inner surface of the ring. The ring has a plurality of dust discharge grooves formed on an inner surface thereof. The inner surface of the ring substantially configured to abut an outer surface of the screw shaft. Each wiping protrusion is arranged between any two adjacent dust discharge grooves. When the wiper screws on the rolling groove of the screw shaft, the wiping protrusions are arranged in and compressed by the rolling groove of the screw shaft, and a portion of the rolling groove touched with the wiping protrusions is arranged in a single pitch of the screw shaft. The instant disclosure also provides a ball screw assembly. | 12-04-2014 |
| 20150007679 | ELECTROMECHANICAL ACTUATOR - An electromechanical actuator (“EMA”) may comprise a ball screw having at least one tab extending from an inner surface thereof and/or an actuator drive unit (“ADU”) housing that interfaces with the at least one tab. The bail screw may include three tabs extending from the inner surface thereof. An outer surface of the ball screw may be threaded to mate with a threaded portion of an inner surface of the ADU housing, and/or the ADU housing may interface with the at least one tab, and the ball screw may be rotated to translate a ball nut situated concentrically over ball screw axially. The ADU housing may include a gear train assembly having a carrier plate, wherein the carrier plate includes at least one receptacle. | 01-08-2015 |
| 20150053036 | ROTATING MEMBER FOR AN ELEVATING DEVICE - A rotating member has a body, an axle and multiple balls. The body has an outer surface, a spiral groove and a communicating channel. The spiral groove is defined in the outer surface of the body. The communicating channel is defined in the body and communicates with the spiral groove to form at least one recycling path in the body. The axle extends through the body. The balls are mounted in the spiral groove and are moveable along the at least one recycling path. Accordingly, the smoothness of the movement of the rotating member is improved. | 02-26-2015 |
| 20150096397 | BALL SCREW CAPABLE OF SENSING TORQUE IN REAL TIME - A ball screw capable of sensing a torque in real time includes a screw rod, a screw nut sleeved onto the screw rod, a plurality of balls mounted between the screw rod and the screw nut, and a torque sensor haying a first fastening portion and a second fastening portion. The first fastening portion is fixed to a working bench and the second fastening portion is fixed to the screw nut, so the torque sensor can sense how much the torque is while the screw out is driving a working bench to move. In light of this structure, monitoring the voltage value outputted by the torque sensor can sense the torque generated while the working screw rod is working. | 04-09-2015 |
| 20150114156 | BALL SCREW, SEAL MATERIAL, AND SEAL STRUCTURE - A ball screw including: a male component having male grooves on an outer periphery for a ball to roll; a female component fitted together with the male component in an axial direction having female grooves facing the male grooves on an inner periphery for the ball to roll and a circulation path for the ball to circulate; and a seal member at one end, at the other end, or at each of one and the other ends of the female component in the axial direction and including a hole capable of communicating with the inner periphery, a fiber layer having a fitting surface having a convex part capable of being fitted in the male grooves when the male component is inserted into the hole and a surface made of fibers impregnated with rubber or resin, and a rubber or resin layer laminated on a surface opposite to the fitting surface. | 04-30-2015 |
| 20150362061 | Ball Screw Device - There is provided a ball screw device having a cooling mechanism of efficiently cooling down a bearing device supporting a screw shaft of a ball screw or vicinities of the bearing device. For this purpose, the ball screw device ( | 12-17-2015 |
| 20160091066 | SCREW DEVICE - Provided is a screw device in which a sudden change in force on or a sudden change in the positions of the rolling members can be suppressed at the boundary between a helical loaded rolling-member rolling path and a return path of the screw device. | 03-31-2016 |
| 20160131233 | Single-Axis Actuator - As compared to a single-axis actuator in which a ball returning passage of a ball screw mechanism is made of a circulating tube, the cross-sectional shape perpendicular to the longitudinal direction of a threaded shaft of a slider can be made small, when the diameter of the outer circumferential circle of the threaded shaft of the present invention is same as that of the circulating tube type, and the load capacity can be made large, when the size in the longitudinal direction of the threaded shaft of the slider of the present invention is same as that of the circulating tube type. The ball returning passage for returning the balls ( | 05-12-2016 |
