Patent application number | Description | Published |
20090309438 | Motor Structure - A motor structure includes a housing having a shaft tube receiving a bearing. The shaft tube includes a positioning section on an outer periphery thereof. A rotor includes a shaft rotatably extending through the bearing. A stator is mounted around the shaft tube and includes an upper bobbin having an abutting portion and a lower bobbin having an engaging portion. The positioning section of the shaft tube provides the engaging portion of the lower bobbin with an axial supporting force along a longitudinal axis of the shaft tube to position the stator in a fixed axial position relative to the bearing along a longitudinal axis of the shaft tube. Also, the abutting portion of the upper bobbin abuts the bearing to prevent the bearing from disengaging from the shaft tube. | 12-17-2009 |
20100283344 | Inner-Rotor-Type Motor - An inner-rotor-type motor according to the preferred teachings of the present invention includes a housing, a stator, a rotor and a bearing seat. The stator is received in an assembly space of the housing. The rotor is rotatably positioned in the housing via a bearing and extends through a through-hole of the stator. The bearing seat includes a socket having a first recess and second recess and couples to the assembly opening of the assembly space. A stopper is at least a part of the upper wall of the socket and arranged between the first recess and the second recess. The bearing can pass through an end of the socket and be positioned in the first recess, while a circuit board can pass through another end of the socket and be positioned in the second recess. Accordingly, the assembly is simplified and the assembly convenience is improved. | 11-11-2010 |
20110044570 | Positioning Device for Motor Bearing - A positioning device includes a shaft tube having a receptacle receiving a support member that includes first and second ends spaced along an axis. The support member further includes a through-hole extending from the first end through the second end. A bearing is received in the receptacle and includes an end facing the first end of the support member. The end of the bearing includes an inclined pressing surface aligned with a support portion formed on the first end of the support member. The pressing surface deforms the support portion when the bearing is pushed downward during assembly. The deformed support is received in a groove between the pressing surface and an inner periphery of the receptacle to offset and absorb the downward pressing force. The bearing is, thus, reliably fixed in the desired assembly position while preventing the support member from being damaged or generating noise during operation. | 02-24-2011 |
20120045325 | Fan Housing Module - A fan housing module includes a base unit and a cover unit engageable with the base unit. The base unit includes a plurality of bases integrally formed with each other to form a structure in the same array arrangement. Alternatively, the cover unit includes a plurality of covers integrally formed with each other to form a structure in the same array arrangement. Thus, after the base unit is engaged with the cover unit, each base and one of the covers together form a fan housing for assembly of a motor fan such that the motor fans form a fan array. | 02-23-2012 |
20120062050 | Rotor for Motor - A rotor for a motor includes a shaft having an outer periphery with an engaging portion. At least one coupling member includes an engaging hole. The shaft extends through the engaging hole of the at least one coupling member. The at least one coupling member is engaged with the engaging portion of the shaft by tight coupling. A plastic magnet envelops the shaft and the at least one coupling member by injection molding. The at least one coupling member prevents the plastic magnet from disengaging from the shaft, providing enhanced engaging effect while reducing structural complexity and enhancing assembling convenience. | 03-15-2012 |
20120062079 | Rotor for Motor - A rotor for a motor includes a hub having a through-hole. A shaft extends through the through-hole and includes an outer periphery having a reduced section, wherein the reduced section has two end walls in an axial direction of the motor. The engaging member includes a hole through which the shaft extends. The engaging member is tightly engaged with the reduced section while tightly pressing against the two end walls of the reduced section. The engaging member is a resilient, continuous annular member free of grooves and notches. When the rotor is mounted in a motor, axial vibration of the hub relative to the shaft is reduced, and leakage of lubricating oil in the bearings of the motor is prevented. | 03-15-2012 |
20130033143 | Motor with Axial Air Gap - The invention discloses a motor with axial air gap including a base, a rotor and a coil unit. The base has a shaft-coupling portion. The rotor has a body coupled with a permanent magnet and a shaft. The permanent magnet has inner and outer circumferential faces, wherein the inner and outer circumferential faces are respectively projected onto the base as inner and outer circles. The shaft is coupled with the shaft-coupling portion. The coil unit is mounted on the base and has one or more coils. The permanent magnet and the coil unit face each other. At least one coil has a periphery intersecting with the inner and outer circles. The permanent magnet has a first radial length between the inner and outer circumferential faces. At least one coil has a second radial length. The first radial length is 10% to 90% of the second radial length. | 02-07-2013 |
20130058807 | Miniature Motor and Cooling Fan Having the Same - A miniature motor includes a base having a coupling portion. An engaging portion is provided on a periphery of the base surrounding the coupling portion to form a concave surface therebetween. A stator coil unit includes a substrate mounted on the concave surface. A rotating member is rotatably coupled with the coupling portion and includes a permanent magnet. The base includes a thermoplastic section having a reduced opening. The reduced opening is formed by heating and deforming the thermoplastic section after the stator coil unit is mounted on the concave surface, and the molten and deformed thermoplastic section takes shape to form the reduced opening after cooling. The base can be connected to a frame having an air inlet and an air outlet to form a fan housing, and the rotating member includes blades to form an impeller, providing a cooling fan including the miniature motor. | 03-07-2013 |
20130214622 | Motor Structure - A motor structure includes a housing having a shaft tube receiving a shaft retaining assembly. The shaft tube includes a positioning member on an outer periphery thereof. A rotor includes a shaft rotatably extending through the bearing. A stator is mounted around the shaft tube, couples with the positioning member, and includes a bobbin having an abutting portion pressing a top face of the shaft retaining assembly by a free end thereof. Specifically, the positioning member is distant from the top face by a first distance in an axial direction of the shaft tube, the abutting portion is made of elastic material, the positioning member is distant from the free end by a second distance in an axial direction of the assembling hole is defined, and the second distance is smaller than the first distance when the stator is separate from the shaft tube. | 08-22-2013 |
20140203680 | Easy-to-Start Motor and a Base Thereof - An easy-to-start motor includes a base, a stator and a rotor. The base has a plastic member and a metallic induction member wrapped with the plastic member. The metallic induction member includes at least one magnetic attraction portion. Each magnetic attraction portion is in the form of a protrusion. The stator is coupled with the base. The rotor has a shaft and a permanent magnet. The shaft is capable of being coupled with the base. The at least one magnetic attraction portion is magnetically attracted by the permanent magnet, so as to prevent the rotor from stopping at a dead location where it is difficult to start the motor. A base of the easy-to-start motor is also disclosed and adapted to be coupled with a rotor, including a plastic member and a metallic induction member wrapped with the plastic member. | 07-24-2014 |