JP2012231564A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce design cost of a motor used for various applications.SOLUTION: A motor 100 includes: a motor portion 101 in which a shaft 121 projects from a motor body; and a motor mounting portion 103 disposed on a tip side of the shaft of the motor body. The motor body includes a first fitting portion 114 positioned on a first circumference around a central axis. The motor mounting portion includes: a second fitting portion 176 positioned on a second circumference around the central axis and fitted to the first fitting portion 114; a third fitting portion 179 positioned on a third circumference around the central axis and inserted to an opening of a device on which the motor portion is mounted; a motor fixation portion 178 fixed to the motor body; and a device fixation portion 173 fixed to the device on which the motor portion is mounted.

Description

  The present invention relates to an electric motor.

  Conventionally, general-purpose motors are used in various devices such as office automation (OA) devices such as copiers, printers, facsimiles, and home appliances such as air purifiers and ventilation fans. Some of such motors have a fitting portion for positioning with respect to the apparatus. For example, in a brushless motor disclosed in Japanese Patent Application Laid-Open No. 2010-110198, an inlay portion is provided in the housing. Positioning in the radial direction is performed by fitting the inlay portion with the mating member.

Also in the stepping motor disclosed in Japanese Patent Application Laid-Open No. 2009-95085, the casing is provided with an inlay portion, and an attachment plate is provided around the inlay portion. The inlay portion is inserted into the guide hole of the mounted plate and the mounting plate is rotated, whereby the mounting plate and the mounted plate are easily fixed.
JP 2010-110198 A JP 2009-95085 A

  By the way, in a general-purpose motor used for various applications, various sizes are required as the diameter of a portion to be fitted to the apparatus. Conventionally, a part of a motor housing, a part of a bearing holder, or the like is used as a part to be fitted to the apparatus, so that the housing and the bearing holder need to be redesigned every time the application is changed. Since these parts are connected to various other parts of the motor, complicated design change work occurs.

  An object of this invention is to reduce the design cost of the motor used for various uses.

  A motor according to an exemplary first aspect of the present invention includes: a motor portion from which a shaft protrudes from a motor main body; and a motor mounting portion disposed on a tip end side of the shaft of the motor main body. Includes a first fitting portion located on a first circumference centered on a central axis, and the motor mounting portion is located on a second circumference centered on the central axis, A second fitting portion that fits with the fitting portion, and a third fitting that is located on a third circumference centered on the central axis and that is inserted into an opening provided in the device on which the motor portion is mounted A coupling portion; a motor fixing portion fixed to the motor body; and a device fixing portion fixed to the device on which the motor portion is mounted.

  ADVANTAGE OF THE INVENTION According to this invention, the design cost of the motor used for various uses can be reduced.

FIG. 1 is a cross-sectional view of the motor according to the first embodiment. FIG. 2 is a sectional view of the motor. FIG. 3 is a perspective view of the motor mounting portion. FIG. 4 is an exploded perspective view of a part of the motor. FIG. 5 is a perspective view of a part of the motor. FIG. 6 is a cross-sectional view of another example motor. FIG. 7 is a perspective view of a part of another example motor. FIG. 8 is a cross-sectional view of a motor according to the second embodiment. FIG. 9 is a front view of the motor. FIG. 10 is a perspective view of the motor mounting portion.

  In the present specification, the upper side of FIG. 1 in the direction of the central axis of the motor is simply referred to as “upper side” and the lower side is simply referred to as “lower side”. Note that the vertical direction does not indicate the positional relationship or direction when incorporated in an actual apparatus. The radial direction centered on the central axis is simply referred to as “radial direction”, and the circumferential direction centered on the central axis is simply referred to as “circumferential direction”.

(First embodiment)
FIG. 1 is a longitudinal sectional view of a brushless motor 100 (hereinafter referred to as “motor”) according to an exemplary first embodiment of the present invention. The motor 100 is used in various OA equipment.

  The motor 100 includes a motor unit 101 and a motor mounting unit 103. In FIG. 1, a shaft 121 that is an output shaft of the motor unit 101 faces downward. In the following description, a portion of the motor unit 101 other than the portion protruding below the shaft 121 is referred to as a “motor body 102”. That is, a part of the shaft 121 protrudes from the motor body 102. The motor attachment portion 103 is disposed on the distal end side of the shaft 121 of the motor main body 102.

  FIG. 2 is an enlarged view of the motor 100. Parallel diagonal lines in the details of the cross section are omitted. Moreover, a part of site | part behind the cross section is also shown. The motor unit 101 includes a rotating unit 111, a stationary unit 112, and two bearings 113. The rotating unit 111 rotates around a central axis J1 that faces in the vertical direction. The bearing 113 is fixed to the stationary part 112 and supports the rotating part 111 to be rotatable. The bearing 113 is a ball bearing. The bearing may be other such as an oil-impregnated sleeve bearing.

  The rotating unit 111 includes a shaft 121, a rotor holder 122, and a rotor magnet 123. The shaft 121 has a substantially cylindrical shape centered on the central axis J1 and is rotatably supported by the bearing 113. The rotor holder 122 is attached to the side opposite to the output side of the shaft 121. The rotor holder 122 includes a shaft fixing part 131, a connection part 132, and a cylindrical part 133. The rotor holder 122 is molded by pressing a thin plate. The thin plate is formed of, for example, a magnetic material that is a metal. The shaft fixing portion 131 is fixed to the shaft 121 on the upper side of the upper bearing 113. The connecting portion 132 extends radially outward from the shaft fixing portion 131. The cylindrical portion 133 extends downward from the outer edge of the connection portion 132.

  The rotor magnet 123 is fixed to the outer peripheral surface of the cylindrical portion 133. The rotor magnet 123 may be cylindrical or a plurality of magnets arranged in the circumferential direction.

  The stationary part 112 includes a cover member 141, a stator 142, and a circuit board 143. The cover member 141 includes an inner cylinder part 151, an outer cylinder part 152, and a bottom part 153. The inner cylinder portion 151 and the outer cylinder portion 152 are cylindrical with the central axis J1 as the center, and are arranged coaxially. The bottom part 153 connects the lower end of the outer cylinder part 152 and the lower end of the inner cylinder part 151.

  A plurality of screw holes 154 are provided in the bottom portion 153. The screw hole 154 is used for fastening the motor mounting portion 103 and the motor portion 101. The inner cylinder portion 151 supports the bearing 113 on the inner peripheral surface. A metal spacer is press-fitted into the inner cylinder portion 151. The spacer abuts on the bearing 113 to position the bearing 113 in the axial direction. A member for applying a preload such as a wave washer may be interposed between the spacer and the bearing 113. The spacer may be made of resin. A lower portion, that is, a lower portion of the outer peripheral portion of the bearing 113 on the tip end side of the shaft 121 is a first fitting portion 114 that is fitted to the motor mounting portion 103. The outer cylinder part 152 supports the stator 142 on the inner peripheral surface. The cover member 141 is formed by pressing a single plate member that is a metal. Preferably, the cover member 141 is a conductive member. More preferably, the cover member 141 is a magnetic body.

  Stator 142 includes a stator core 161, an insulator 162, and a coil 163. The stator 142 has an annular shape centered on the central axis J1. The stator core 161 is formed by stacking a plurality of thin magnetic steel plates in the vertical direction. The stator core 161 includes an annular core back and a plurality of teeth. The teeth extend radially inward from the core back. The tip of the teeth faces the rotor magnet 123 in the radial direction. The core back is press-fitted into the outer cylinder portion 152. The insulator 162 covers the stator core 161. The coil 163 is formed by winding a conductive wire on each of the teeth from the insulator 162 in multiple layers.

  The circuit board 143 is located above the insulator 162. Torque is generated between the stator 142 and the rotor magnet 123 by causing a current to flow from the circuit board 143 to the coil 163. Thereby, the rotation part 111 rotates centering on the central axis J1.

  FIG. 3 is a perspective view of the motor mounting portion 103. The upper side of FIG. 3 corresponds to the lower side of FIG. The motor mounting portion 103 is molded from a metal plate member by pressing. As shown in FIGS. 2 and 3, the motor attachment portion 103 includes a flat plate portion 171, four upright portions 172, and two device fixing portions 173. An opening 174 is provided in the center of the flat plate portion 171. An upright portion 172 is provided so as to protrude upward from the inner edge of the opening in FIG.

  The upright portions 172 are a plurality of portions arranged in the circumferential direction in the plate member before processing. These parts protrude toward the central axis J1. The upright portions 172 are provided by bending these portions so as to be parallel to the central axis J1. The four portions 175 between the upright portions 172 are fitted to the outer periphery of the first fitting portion 114 of the bearing 113 as shown in FIG. 2 and FIG. As a result, the position of the motor mounting portion 103 in the direction perpendicular to the central axis J1 with respect to the motor portion 101 is determined.

  The end of the portion 175 on the central axis J1 side has an arc shape. Hereinafter, these four portions 175 are collectively referred to as “second fitting portions 176”. The tip of the portion 175 may be linear in the radial direction and perpendicular to the central axis J1. The second fitting portion 176 is located on the second circumference centered on the central axis J1, the first fitting portion 114 is located on the first circumference centered on the central axis J1, and the first circumference And the second circumference substantially coincide with each other, the position of the motor mounting portion 103 in the direction perpendicular to the central axis J1 with respect to the motor portion 101 is determined. The portion 175 between the plurality of upright portions 172 functions as the second fitting portion 176, whereby the structure of the motor mounting portion 103 can be simplified.

  FIG. 4 is an exploded perspective view showing the cover member 141, the bearing 113, the motor mounting portion 103, and the screw 177. FIG. 5 is a perspective view showing the assembled state. As shown in FIGS. 2 to 4, the flat plate portion 171 is provided with three through holes that overlap the screw holes 154 of the cover member 141. Screws 177 are inserted into the three through holes, and the screws 177 are screwed into the screw holes 154, whereby the motor mounting portion 103 is fixed to the motor body 102. Hereinafter, a portion constituting the through hole of the flat plate portion 171 is referred to as a “motor fixing portion 178”.

  In FIG. 1 and FIG. 2, a part of a device on which the motor 100 is mounted is indicated by a two-dot chain line. The apparatus is provided with a circular opening 91 for mounting the motor 100. Hereinafter, the portion around the opening 91 is referred to as “attachment target portion 92”. The four standing portions 172 are inserted into the opening 91. By fitting the upright portion 172 and the opening 91, the position in the direction perpendicular to the central axis J1 in the attachment target portion 92 of the motor 100 is determined. Hereinafter, the four standing portions 172 are collectively referred to as “third fitting portion 179”. The third fitting portion 179 can be easily provided by bending a part of the plate member.

  The upright portion 172 may be curved into a partial cylindrical surface according to the radius of curvature of the opening 91 or may be flat. In the case of a flat plate shape, both edges in the circumferential direction are used for fitting with the opening 91. That is, the third fitting portion 179 is positioned on the third circumference centered on the central axis J1, and the third circumference and the edge of the opening 91 substantially coincide with each other. The position in the direction perpendicular to the central axis J1 is determined.

  Each of the two device fixing portions 173 includes a through hole. In other words, the device fixing part 173 is a part constituting the through hole. The screw is inserted into the through-hole and the screw is fixed to the attachment target portion 92, whereby the motor 100 is fixed to the attachment target portion 92. The device fixing portion 173 is a portion that projects stepwise from the flat plate portion 171 toward the lower end side of the shaft 121 outside the third fitting portion 179 in the radial direction.

  The distance in the central axis J1 direction between the device fixing portion 173 and the flat plate portion 171 is larger than the height of the head of the screw 177. As a result, as shown in FIG. 2, even if the motor fixing portion 178 exists between the third fitting portion 179 and the device fixing portion 173, the screw 177 and the attachment target portion 92 do not interfere with each other. Also, the use of screws eliminates the need for special equipment such as welding equipment. The height of the upright portion 172 protruding from the flat plate portion 171 is larger than the distance between the device fixing portion 173 and the flat plate portion 171 in the direction of the central axis J1. Thereby, the third fitting portion 179 can be fitted into the opening 91.

  FIG. 6 is a cross-sectional view showing another example of the motor 100 and corresponds to FIG. FIG. 7 is a perspective view showing a part of another example of the motor 100, and corresponds to FIG.

  In another example of the motor 100, an annular projecting portion 180 projecting from the flat plate portion 171 is provided instead of the standing portion 172 of the motor mounting portion 103. The other structure of the motor 100 is the same as that of FIG. The annular protrusion 180 has an annular shape centered on the central axis J <b> 1 and protrudes toward the distal end side of the shaft 121. The annular protrusion 180 is formed by drawing the flat plate portion 171. By inserting the annular projecting portion 180 into the opening 91 of the attachment target portion 92, the position in the direction perpendicular to the central axis J1 of the motor 100 is determined. That is, the annular protrusion 180 is the third fitting part 179.

  A portion of the flat plate portion 171 inside the annular projecting portion 180 functions as the second fitting portion 176. By fitting the second fitting portion 176 with the first fitting portion 114 that is the outer peripheral portion of the bearing 113, the position of the motor mounting portion 103 in the direction perpendicular to the central axis J1 with respect to the motor portion 101 is determined. .

  By providing the third fitting portion 179 as an annularly bent portion that stops the central axis J1 in the plate member before processing, the strength and coaxiality of the third fitting portion 179 can be improved. it can.

  As described above, in the motor 100, the position of the motor mounting portion 103 with respect to the motor portion 101 in the direction perpendicular to the central axis J1 is determined by the fitting of the first fitting portion 114 and the second fitting portion 176. Is done. Further, when the third fitting portion 179 is fitted into the opening 91 of the attachment target portion 92, the position of the motor attachment portion 103 relative to the attachment target portion 92 in the direction perpendicular to the central axis J1 is determined. As a result, the position of the motor unit 101 with respect to the attachment target unit 92 is accurately determined.

  Such a motor 100 is a cross flow used for a fan heater or the like when it is necessary to mesh the gear provided on the output shaft of the motor with the gear of the reduction mechanism on the apparatus side, such as a printer or a facsimile. Like a fan, it is particularly suitable for a case where it is necessary to have both ends because the shaft swings only when it is cantilevered.

  Since the position of the motor part 101 with respect to the attachment target part 92 is determined by the motor attachment part 103, the motor part 101 can be fixed to the opening 91 having a different size only by changing the design of the motor attachment part 103. Become. In addition, even when the diameter of the bearing 113 of the motor unit 101 is changed, the motor unit 101 can be fixed to the mounting target portion 92 only by changing the design of the motor mounting unit 103. As a result, the design cost of a general-purpose motor used for various applications can be reduced.

  Further, since the bearing 113 also serves as the first fitting portion 114, the center axis J1 and the center of the third fitting portion 179 can be matched with high accuracy.

(Second Embodiment)
FIG. 8 is a cross-sectional view of a motor 200 according to the second exemplary embodiment of the present invention. The motor 200 is an outer rotor type, and is used as a drive source for home appliances such as an air purifier and a ventilation fan. The motor 200 includes a motor part 201, a motor attachment part 203, and a cover member 204. The motor unit 201 includes a rotating unit 211, a stationary unit 212, and two bearings 213 that are ball bearings. The bearing may be other such as an oil-impregnated sleeve bearing. The rotating part 211 rotates around a central axis J2 that faces the stationary part 212 in the vertical direction.

  The rotating unit 211 includes a shaft 221, a rotor holder 222, and a rotor magnet 223. In FIG. 8, the output side end of the shaft 221 faces downward. Hereinafter, a portion of the motor unit 201 excluding the shaft 221 protruding downward is referred to as a “motor body 202”. The motor attachment portion 203 is disposed on the distal end side of the shaft 221 of the motor main body 202. The rotor holder 222 has a substantially cylindrical shape with a lid, and is formed by pressing a thin plate. The upper portion of the shaft 221 is fixed to the hole provided in the center of the lid portion 231 of the rotor holder 222. The rotor magnet 223 is fixed to the inner peripheral surface of the cylindrical portion 232 of the rotor holder 222. The rotor magnet 223 may be cylindrical, or a plurality of magnets arranged in the circumferential direction.

  The stationary part 212 includes a bush 241, a stator 242, and a circuit board 243. The bush 241 has a substantially cylindrical shape centered on the central axis J2. Bearings 213 are inserted into the upper and lower portions of the inner peripheral surface of the bush 241. A first fitting portion 214 is provided below the bush 241. The 1st fitting part 214 is cyclic | annular centering on the central axis J2, and protrudes below.

  A shaft 221 is press-fitted inside the bearing 213. In the motor unit 201, the shaft 221 is supported by two bearings 213 held inside the bush 241 so as to be rotatable around the central axis J2. Stator 242 includes a stator core 261 and a coil 263. The stator core 261 has an annular shape centered on the central axis J2, and is formed by stacking a plurality of thin magnetic steel plates in the vertical direction. A radially inner portion of the stator core 261 is fixed to the outer peripheral surface of the bush 241. The stator core 261 may be indirectly fixed to the bush 241.

  The coil 263 is formed by winding a conductive wire around the stator core 261. The rotor magnet 223 is located outside the stator 242 in the radial direction, and torque is generated between the stator 242 and the rotor magnet 223.

  The cover member 204 has a substantially cylindrical shape with a lid and covers the rotor holder 222. The cover member 204 is molded by pressing a metal plate. The motor attachment portion 203 has a disk shape that extends radially outward from the lower end of the bush 241 and is attached to the attachment target portion 92 in a device such as a home appliance. The motor mounting portion 203 is molded by pressing a metal plate member. In the motor 200, the lower end portion of the cylindrical portion 251 of the cover member 204 is fixed to the motor mounting portion 203, thereby preventing dust and the like from entering the motor 200. The lower end portion of the cylindrical portion 251 includes a flange portion 253 that spreads outward in the radial direction.

  FIG. 9 is a front view of the motor 200. FIG. 10 is a perspective view of the motor mounting portion 203. The upper side of FIG. 10 corresponds to the lower side of FIG.

  As shown in FIGS. 8 and 10, the motor mounting portion 203 includes a flat plate portion 271, six upright portions 272, three device fixing portions 273, a central portion 280, and three claw portions 277. . 10 shows a state before the claw portion 277 is bent, and FIG. 9 shows the claw portion 277 before being bent by a thin line. In a state where the motor 200 is assembled, the claw portion 277 is bent so as to overlap the flange portion 253 of the cover member 204 as shown in FIGS. 8 and 9.

  The central portion 280 protrudes toward the motor body 202 around the shaft 221. In other words, the flat plate portion 271 is located on the distal end side of the shaft 221 with respect to the central portion 280. An opening 274 is provided at the center of the central portion 280. The upright portion 272 protrudes upward in FIG. 10 at the boundary between the flat plate portion 271 and the central portion 280. A portion 275 around the opening 274 of the central portion 280 is fitted with the first fitting portion 214 of the bush 241 as shown in FIG. As a result, the position of the motor mounting portion 203 in the direction perpendicular to the central axis J2 with respect to the motor portion 201 is determined. The edge of the opening 274 has an annular shape. Hereinafter, the portion 275 is referred to as a “second fitting portion 276”.

  The first fitting portion 214 and the second fitting portion 276 are not limited to an annular shape, and the second fitting portion 276 is located on the second circumference with the central axis J2 as the center, and the first fitting The part 214 is also located on the first circumference centered on the central axis J1, and the first circumference and the second circumference substantially coincide with each other so that the motor mounting portion 203 is perpendicular to the central axis J2 with respect to the motor portion 201. The position in the correct direction is determined.

  The flat plate portion 271 is provided with three through holes that overlap the screw holes 254 of the bush 241. Screws 277 are inserted into the three through holes, and the screws 277 are screwed into the screw holes 254, whereby the motor mounting portion 203 is fixed to the motor portion 201. Hereinafter, the portion constituting the through hole is referred to as “motor fixing portion 278”.

  The six upright portions 272 are inserted into the openings 91 of the attachment target portion 92. The position of the attachment target portion 92 of the motor 200 in the direction perpendicular to the central axis J <b> 2 is determined by the fitting of the standing portion 272 and the opening 91. Hereinafter, the six upright portions 272 are collectively referred to as a “third fitting portion 279”. The upright portions 272 are a plurality of portions arranged in the circumferential direction in the plate member before processing. These portions protrude radially outward around the central portion 280. The upright portion 272 is provided by bending these portions so as to be parallel to the central axis J2. Precisely, these portions are bent together with the step when the step between the central portion 280 and the flat plate portion 271 is formed.

  The third fitting portion 279 can be easily provided by bending a part of the plate member. Further, since the third fitting portion 279 is provided by bending a portion protruding radially outward around the central portion 280, the central portion 280 protrudes toward the motor main body 202. However, the third fitting portion 279 can be easily provided.

  The standing portion 272 may be curved in a partial cylindrical surface shape according to the radius of curvature of the opening 91 or may be a flat plate shape. In the case of a flat plate shape, both edges in the circumferential direction are used for fitting with the opening 91. That is, the third fitting portion 279 is located on the third circumference centered on the central axis J2, and the third circumference and the edge of the opening 91 substantially coincide with each other in the attachment target portion 92 of the motor 200. A position in a direction perpendicular to the central axis J2 is determined.

  The three device fixing portions 273 protrude outward in the radial direction. Each device fixing portion 273 includes a through hole. The motor attachment portion 203 is attached to the attachment target portion 92 by inserting screws into the through holes of the device fixing portion 273 and the screw holes provided in the attachment attachment portion 92 of the device.

  Also in the motor 200, the position of the motor mounting portion 203 relative to the motor portion 201 in the direction perpendicular to the central axis J2 is determined by the fitting of the first fitting portion 214 and the second fitting portion 276. Further, when the third fitting portion 279 is fitted into the opening 91 of the attachment target portion 92, the position of the motor attachment portion 203 relative to the attachment target portion 92 in the direction perpendicular to the central axis J2 is determined. As a result, the position of the motor part 201 with respect to the attachment target part 92 is accurately determined.

  Even when the motor mounting portion 203 is used to fix the motor portion 201 to a different size of the opening 91 or the diameter of the first fitting portion 214 of the motor portion 201 is changed, the design cost of the general-purpose motor is reduced. Reduction is realized.

  In the motor 200, since the cover member 204 does not support other parts such as the stationary part 212, a large force is not applied to the cover member 204 due to vibration of the motor part 201 or external impact. Further, since the cover member 204 is not provided with an attachment portion that is attached to the apparatus, high strength is not required. For this reason, it is not necessary to firmly fix the cover member 204 and the motor attachment portion 203, and the fastening structure between the cover member 204 and the motor attachment portion 203 can be simplified. As a result, the cover member 204 can be easily designed.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible.

  For example, the first fitting portion 114 in the first embodiment may be formed by the cover member 141 of the motor 100. The 1st fitting parts 114 and 214 in the 1st and 2nd embodiment do not need to be annular, and may be a plurality of parts arranged on the circumference. Further, the second fitting portion may protrude toward the motor body. For example, the second fitting portion may be fitted to the outer periphery of the motor body. In this case, the outer periphery of the motor body functions as the first fitting portion. Also in the second embodiment, the third fitting portion 279 may be annular as in FIG.

  Generally speaking, the first to third fitting portions are provided as an annular part or a plurality of parts arranged on the circumference. When the fitting portion is provided as a plurality of portions, the portions used for fitting are positioned on both sides with respect to the diameter facing an arbitrary direction in order to stably perform the fitting.

  Note that a cylindrical fitting portion may protrude from the edge of the opening 91 toward the motor attachment portions 103 and 203, and the fitting portion and the third fitting portions 179 and 279 may be fitted. In this case, when the fitting portion on the attachment target portion 92 side is inserted inside the third fitting portions 179 and 279 and the upright portions 172 and 272 are flat, the upright portions 172 and 272 The center in the circumferential direction is used for fitting.

  In the motor fixing portions 178 and 278 of the first and second embodiments, it is preferable that only the portions around the through holes are slightly convex toward the motor main bodies 102 and 202. Thereby, the shape precision requested | required of the other site | part of the motor attachment part 103,203 can be made low, and the manufacturing cost of a motor attachment part can be reduced.

  The motor fixing portions 178 and 278 may be fixed to the motor main bodies 102 and 202 by welding, caulking, or the like. The device fixing portions 173 and 273 may also be fixed to the attachment target portion 92 by welding or caulking.

  The motor attachment portions 103 and 203 may be molded from resin. In this case, it is preferable that the third fitting portions 179 and 279 have an annular shape.

  The structure of the motor mounting portions 103 and 203 of the motors 100 and 200 can be used for other types of motors such as stepping motors.

  The configurations in the above embodiment and each modification may be combined as appropriate as long as they do not contradict each other.

  The present invention can be used for motors for office equipment and home appliances, and motors for various other purposes.

91 Opening 101, 201 Motor part 102, 202 Motor body 103, 203 Motor mounting part 113 Bearing 114, 214 First fitting part 121, 221 Shaft 172, 272 Standing part 173, 273 Device fixing part 175 (between standing part ) Regions 176, 276 Second fitting portion 178, 278 Motor fixing portion 179, 279 Third fitting portion 180 Annular protrusion 280 Central portion J1, J2 Central axis

Claims (7)

A motor part with a shaft protruding from the motor body;
A motor mounting portion disposed on the tip side of the shaft of the motor body;
With
The motor body includes a first fitting portion located on a first circumference centered on a central axis;
The motor mounting portion is
A second fitting portion located on a second circumference centered on the central axis and fitted with the first fitting portion;
A third fitting portion that is located on a third circumference centered on the central axis and is inserted into an opening provided in a device on which the motor portion is mounted;
A motor fixing portion fixed to the motor body;
A device fixing unit fixed to the device on which the motor unit is mounted;
Comprising a motor. The motor mounting portion is formed of a plate member;
2. The motor according to claim 1, wherein the device fixing portion is a portion protruding toward a tip end side of the shaft at a radially outer side than the third fitting portion.   The motor according to claim 2, wherein the third fitting portion is formed by bending a plurality of portions arranged in the circumferential direction around the central axis in the plate member. The plurality of portions arranged in the circumferential direction are portions protruding toward the central axis,
4. The motor according to claim 3, wherein a portion between the plurality of portions in the plate member is the second fitting portion. The motor mounting portion includes a central portion protruding toward the motor body around the shaft;
The motor according to claim 3, wherein the plurality of portions arranged in the circumferential direction are portions protruding radially outward around the central portion.   The motor according to claim 2, wherein the third fitting portion is a portion of the plate member that is bent in an annular shape around the central axis.   The motor according to claim 1, wherein the first fitting portion is a part of an outer peripheral portion of a bearing that supports the shaft.

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