Motors and rotating equipment

Abstract

The present invention relates to a motor and a rotating device. The motor according to the embodiment includes: a commutator provided on a rotating shaft; a brush in contact with the commutator; a bracket having a wall surface opposite to the brush; and a deformable portion in contact with the brush and the wall surface. The bracket includes a protrusion provided on the commutator side relative to the deformable portion. The protrusion protrudes from the wall surface toward the brush.

Description

Technical Field

[0001] The invention relates to a motor and a rotating device. Background Art

[0002] Conventionally, there is known a motor in which a damping member fixed to a curved portion of a brush and a brush holder is provided to reduce vibration of the brush to improve quietness.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2008-22619

[0004] However, in the above motor, due to vibration of the brush, for example, the damping member may move toward the rotating shaft side of the motor, that is, toward the tip side of the brush in contact with the commutator, and may hinder electrical contact between the brush and the commutator. Summary of the invention

[0005] The present invention takes the above as an example of the subject, and an object thereof is to provide a motor and a rotating device that improve quietness and improve electrical contact between a brush and a commutator.

[0006] A motor according to one embodiment of the present invention includes: a commutator provided on a rotating shaft; a brush in contact with the commutator; a bracket having a wall surface facing the brush; and a deformable portion in contact with the brush and the wall surface. The bracket includes a protrusion provided on the commutator side relative to the deformable portion. The protrusion protrudes from the wall surface toward the brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a top view of the rotating device involved in embodiment.

[0008] Figure 2 It is a bottom view of the rotating device involved in the embodiment.

[0009] Figure 3 This is a perspective view of the rotating device according to the embodiment with the first housing removed.

[0010] Figure 4 It is a top view of the rotating device according to the embodiment with the first housing removed.

[0011] Figure 5 This is a three-dimensional diagram of the motor.

[0012] Figure 6 This is an exploded perspective view of the motor.

[0013] Figure 7 This is a front view of the bracket as viewed from the frame side.

[0014] Figure 8 It is an exploded perspective view of the bracket.

[0015] Fig. 9This is a front view of the bracket as viewed from the frame side.

[0016] Fig.10 This is a perspective view of the bracket as seen from the frame side.

[0017] Fig.11 yes Fig. 9 Schematic diagram of the XI-XI section.

[0018] Fig.12 It is a perspective view of a bracket body according to a modified example.

[0019] Fig.13 It is a perspective view of a bracket according to a modified example.

[0020] Fig.14 It is a front view of a motor involved in a modification.

[0021] Fig.15 It is a perspective view of a motor according to a modified example.

[0022] Fig.16 yes Fig.14 XIV-XIV section view. DETAILED DESCRIPTION

[0023] Hereinafter, a motor and a rotating device according to an embodiment will be described with reference to the drawings. The motor according to the embodiment is provided in the rotating device.

[0024] In addition, the use of the motor and the rotating device is not limited to the embodiments described below. In addition, it should be noted that the drawings are schematic, and the relationship between the dimensions of the elements, the ratio of the elements, etc. may be different from the actual. In addition, the drawings may sometimes contain parts with different dimensional relationships and ratios.

[0025] Reference Figure 1 to Figure 4 The rotating device 1 according to the embodiment will be described. Figure 1 It is a top view of the rotating device 1 according to the embodiment. Figure 2 It is a bottom view of the rotating device 1 according to the embodiment. Figure 3 This is a perspective view of the rotary device 1 according to the embodiment with the first housing 2A removed. Figure 4 It is a plan view of the rotary device 1 according to the embodiment with the first housing 2A removed.

[0026] The rotary device 1 can be preferably used as an actuator used in, for example, a vehicle air conditioning system, and can control the rotational motion of a louver for controlling air volume or the like.

[0027] The rotary device 1 includes a housing 2 , a motor 3 , a gear train 4 (gear mechanism), and a rotation angle detection sensor 5 .

[0028] The housing 2 includes a first housing 2A and a second housing 2B. The housing 2 accommodates the motor 3, the gear train 4, and the rotation angle detection sensor 5.

[0029] The first housing 2A includes a first face portion 20 that is a top portion of the housing 2 and a first side wall portion 21 provided on the outer periphery of the first face portion 20. An opening portion (not shown) surrounded by the first side wall portion 21 is formed in the first housing 2A so as to face the first face portion 20. In addition, a first insertion portion 22 into which an external connector (not shown) is inserted is formed in the first side wall portion 21 of the first housing 2A.

[0030] The second housing 2B includes a second face portion 23 serving as the bottom portion of the housing 2 and a second side wall portion 24 provided on the outer periphery of the second face portion 23. The second housing 2B is provided with an opening portion 25 surrounded by the second side wall portion 24 so as to face the second face portion 23. In addition, the second side wall portion 24 of the second housing 2B is provided with a second insertion portion 26 into which an external connector (not shown) is inserted.

[0031] The housing 2 is formed by connecting the first housing 2A and the second housing 2B in a state where the opening of the first housing 2A is butted against the opening 25 of the second housing 2B. The first insertion portion 22 and the second insertion portion 26 are connected to form a connector for accommodating an external connector. The housing 2 is formed of a resin material such as polypropylene, polyethylene terephthalate, or ABS.

[0032] In addition, in the first housing 2A, a plurality of engaging portions 200 extending toward the second housing 2B are integrally formed on the outer periphery of the first side wall portion 21. In addition, an engaging recess 201 is provided in the engaging portion 200. On the other hand, in the second housing 2B, a plurality of protrusions 202 (hereinafter referred to as engaging protrusions 202) corresponding to the plurality of engaging portions 200 of the first housing 2A are integrally formed on the second side wall portion 24. The engaging protrusions 202 engage with the engaging recesses 201 of the engaging portion 200.

[0033] Furthermore, in the present embodiment, the engaging portion 200 is provided in the first housing 2A and the engaging protrusion 202 is provided in the second housing 2B, but the engaging portion may be provided in the second housing 2B and the engaging protrusion may be provided in the first housing 2A.

[0034] In addition, a piece 210 (hereinafter referred to as a joining piece 210) protruding outward is formed at both ends of one side of the first housing 2A and the second housing 2B. The joining piece 210 is provided with a connecting hole 211 for inserting a predetermined fastener (not shown), and the first housing 2A and the second housing 2B are firmly connected via the four connecting holes 211 by the predetermined fastener.

[0035] In the first housing 2A, a cylindrical protrusion 221 having a first through hole 220 through which a fastener (not shown) such as a bolt or a screw can be inserted is formed to protrude from the first surface 20. In addition, the second housing 2B is provided with a second through hole 222 into which the protrusion 221 fits.

[0036] The motor 3 may be a known motor such as a stepping motor or a brushless motor, but in the example shown in the figure, it is a DC motor, and a worm 40 included in the gear set 4 is mounted on the rotating shaft 311 of the motor 3. Power is supplied from an external connector to the motor 3 via a connection terminal 8 provided in an insertion port 27 formed by the first insertion portion 22 of the first housing 2A and the second insertion portion 26 of the second housing 2B, and a flexible substrate 7. The structure of the motor 3 will be described later.

[0037] The gear train 4 includes a worm 40, a first transmission gear 41, a second transmission gear 42, and an output gear 43 (rotating body). The worm 40 rotates together with the rotating shaft 311 of the motor 3. A top 40a of the worm 40 on the opposite side to the motor 3 is rotatably supported by the second housing 2B.

[0038] The rotation of the worm 40 is transmitted to the helical gear 41a of the first transmission gear 41, and is transmitted to the second transmission gear 42 via the small-diameter gear 41b which is coaxially arranged with the helical gear 41a and has a relatively smaller diameter than the helical gear 41a. Then, the rotation of the second transmission gear 42 is transmitted to the output gear 43. In addition, the output gear 43 is connected to the output shaft 44. The rotation of the motor 3 is decelerated at a predetermined reduction ratio and output to the outside from the output shaft 44.

[0039] In order to control the rotation angle of the output gear 43 , the rotation angle detection sensor 5 detects the rotation angle of the output gear 43 .

[0040] Next, refer to Figure 5 and Figure 6 The motor 3 will be described. Figure 5 It is a perspective view of the motor 3 . Figure 6 It is an exploded perspective view of the motor 3.

[0041] The motor 3 includes a frame 30 , a plurality of magnets (not shown), an armature 31 , and a bracket 32 ​​.

[0042] The frame 30 includes a bottom portion 300 and a cylindrical portion (hereinafter referred to as a side wall portion) 301 provided along the peripheral edge of the bottom portion 300 .

[0043] A bearing portion 303 protruding outward in the direction of the rotation axis is formed at the bottom portion 300. A hole portion 302 for guiding the rotation axis 311 of the armature 31 (the rotation axis 311 of the motor 3) to the outside is formed at the bearing portion 303. In addition, a bearing (not shown) for rotatably supporting the rotation axis is provided inside the bearing portion 303.

[0044] The side wall 301 is formed to cover the outer periphery of the armature 31. The side wall 301 has an opening 304 on the side opposite to the bottom 300. A plurality of magnets are disposed on an inner wall surface (not shown) of the side wall 301 facing the armature 31, separated from the armature 31.

[0045] The armature 31 includes a core 310 , a coil (not shown) wound around a plurality of magnetic poles 310 a of the core 310 , a rotating shaft 311 fixed to the core 310 , and a commutator 312 .

[0046] The core 310 is formed by laminating a plurality of metal plates along the axial direction of the rotating shaft 311. Examples of the metal plates include electromagnetic steel plates. The rotating shaft 311 is disposed at the center of the core 310 so as to penetrate the core 310.

[0047] The commutator 312 is provided on the outer peripheral surface of the rotating shaft 311. Specifically, the commutator 312 is provided along the circumferential direction of the rotating shaft 311. The commutator 312 includes a plurality of metal plates 312a provided on the other end side located on the opposite side to the end of one side of the rotating shaft 311 led out to the outside of the motor 3.

[0048] The ends of the coils wound around the magnetic poles 310a of the core 310 are connected to the metal plate 312a by welding, etc. The ends of the rotating shaft 311 on the commutator 312 side are rotatably supported by the bearings 33 .

[0049] Next, refer to Figure 7 and Figure 8 The bracket 32 ​​will be described. Figure 7 This is a front view of the bracket 32 ​​as seen from the frame 30 side. Figure 8 3 is an exploded perspective view of the bracket 32 ​​. The bracket 32 ​​includes a bearing plate 320 , a bracket body portion (hereinafter referred to as a body portion) 321 , a pair of terminal portions 322 , a pair of brushes 323 , and a pair of deformable portions 324 .

[0050] The plate (hereinafter referred to as the bearing plate) 320 is connected to the frame 30 (refer to Figure 5 and Figure 6) is installed on the main body 321 on the side opposite to the main body 321. A bearing portion 320a is formed in the center of the bearing plate 320. The bearing portion 320a is recessed toward the side opposite to the main body 321 to accommodate the bearing 33. In addition, a pair of holes (hereinafter referred to as insertion holes) 320b are formed on the bearing plate 320 across the bearing portion 320a. The insertion hole 320b is for the end portion 340a of the terminal portion 322 to be inserted.

[0051] Here, refer to Figure 7 to Figure 10 The main body portion 321 will be described. Fig. 9 This is a front view of the main body 321 as viewed from the frame 30 side. Fig.10 This is a perspective view of the main body 321 as viewed from the frame 30 side.

[0052] The main body 321 is arranged along the rotation axis 311 (see Figure 6 ) is formed as a wall thickness in the axial direction. The main body 321 is formed with a commutator 312 (refer to Figure 6 ) is configured with a hole portion (hereinafter referred to as an insertion hole) 330, and a pair of accommodating portions 331 that accommodate the terminal portion 322, a part of the brush 323 and the deformation portion 324.

[0053] The insertion hole 330 is in an oblong shape and is formed along the axial direction of the rotating shaft 311. The commutator 312 is inserted into the insertion hole 330 together with the rotating shaft 311.

[0054] The receiving portion 331 is formed from the top surface (hereinafter referred to as the front wall) 321a on the core body 310 side along the axial direction of the rotating shaft 311, specifically, from the front wall 321a toward the bearing plate 320 side. The receiving portion 331 is formed by the first receiving portion 332 and the second receiving portion 333 in a T-shape when viewed from the core body 310 side.

[0055] The first receiving portion 332 is formed along the longitudinal direction of the oblong insertion hole 330. A hole portion (hereinafter referred to as an insertion hole) 332b into which the end portion 340a of the terminal portion 322 is inserted is formed at a bottom portion 332a of the first receiving portion 332.

[0056] The second receiving portion 333 is formed to intersect with the first receiving portion 332, and an end portion of one side of the first receiving portion 332 is connected to the first side wall surface 333a (second wall surface). That is, the first receiving portion 332 is connected to the second receiving portion 333. An opening portion 334 is formed at the end portion of the second receiving portion 333 on the commutator 312 side so that the second receiving portion 333 is connected to the insertion hole 330. The opening portion 334 is open to the bearing plate 320 side and the armature 31 side. In addition, the opening portion 334 becomes a part of the opening portion of the first receiving portion 332 and the second receiving portion 333, and a part of these opening portions is open to the armature 31 side. In the second receiving portion 333, a recess 335 is formed on the second side wall surface 333b (first wall surface) opposite to the first side wall surface 333a. Furthermore, a third side wall surface 333 c facing the insertion hole 330 or the space S in the second housing portion 333 is formed in the second housing portion 333 , and the first side wall surface 333 a and the second side wall surface 333 b are connected via the third side wall surface 333 c .

[0057] like Fig.11 As shown, the recessed portion 335 is formed with an opening portion 335a, and the opening portion 335a forms a part of the opening portion 334 at one end 335e in the axial direction of the rotating shaft 311 of the motor 3, specifically, at the end 335e on the front wall 321a side. That is, in the axial direction of the rotating shaft 311, the recessed portion 335 has two ends 335e and 335f, one end 335e forms the opening portion 335a, and the other end 335f has an inclined surface 335b. One end 335e is the end on the front wall 321a side, and the other end 335f is the end on the bottom 333d side of the second housing portion 333. Fig.11 yes Fig. 9 Schematic diagram of the XI-XI section of the embodiment. The recessed portion 335 is formed to the middle portion 335c of the second side wall surface 333b in the axial direction of the rotating shaft 311. That is, the recessed portion 335 is formed from the front wall 321a along the axial direction of the rotating shaft 311, and the end portion 335f on the opposite side of the front wall 321a is formed to be closer to the front wall 321a side than the bottom 333d of the second housing portion 333, and is located in the middle portion 335c of the second side wall surface 333b (a part of the wall surface) in the axial direction of the rotating shaft 311.

[0058] Furthermore, an inclined surface 335b is formed at an end 335f on the opposite side from the front wall 321a in the recess 335. The inclined surface 335b is formed so that the distance from the opening 335a in the axial direction of the rotation shaft 311 increases as it approaches the second housing portion 333 side.

[0059] In addition, if Figure 8 to Figure 10As shown, the main body 321 includes a first protrusion 336 and a second protrusion 337. The first protrusion 336 and the second protrusion 337 are formed at the end of the second housing portion 333 on the commutator 312 side. The first protrusion 336 and the second protrusion 337 are formed to face each other. The first protrusion 336 and the second protrusion 337 form a part of the space S or the opening 334 of the second housing portion 333.

[0060] Specifically, the first protrusion 336 protrudes from the second side wall surface 333b toward the brush 323 and is provided on the commutator 312 side relative to the first resin portion 350a of the first deforming portion 350 constituting the deforming portion 324. In addition, the second protrusion 337 protrudes from the first side wall surface 333a toward the brush 323 and is provided on the commutator 312 side relative to the end portion of the second deforming portion 351 constituting the deforming portion 324 on the commutator 312 side. The first protrusion 336 and the second protrusion 337 are in contact with the end portion of the deforming portion 324 on the commutator 312 side in the radial direction.

[0061] like Figure 7 and Figure 8 As shown, the terminal portion 322 has one end 340 and the other end 341. In addition, the terminal portion 322 has a bent portion 342 formed between the one end 340 and the other end 341. The terminal portion 322 is formed into a bent shape by bending an L-shaped metal plate or the like.

[0062] The end portion 340 is received in the first receiving portion 332 of the main body 321. Figure 6 ) The end portion 340a of the end portion 340 on the opposite side is inserted into the insertion hole 332b of the first receiving portion 332 (see Fig. 9 ) and the insertion hole 320b of the bearing plate 320, and protrudes from the bearing plate 320. One end portion 340 protruding from the bearing plate 320 is connected to the flexible substrate 7 (see Figure 3 )、Connection terminal 8 (refer to Figure 3 ) and electrically connected to an external connector.

[0063] The other end 341 is received in the second receiving portion 333 of the main body 321. The other end 341 is formed to extend toward the opposite side of the insertion hole 330 of the main body 321 relative to the one end 340, that is, toward the radially outer side of the rotating shaft 311. The brush 323 is mounted on the other end 341.

[0064] The brush 323 is a deformable plate having conductivity. The brush 323 contacts the commutator 312 at the contact surface 323a. The brush 323 is mounted on the other end 341 of the terminal portion 322. In addition, a lubricant is present between the contact surface 323a and the commutator 312. The lubricant is provided as a component different from the first resin portion 350a described above, and a known lubricant can be used.

[0065] The deformation part 324 is accommodated in the second accommodation part 333. The deformation part 324 includes a first deformation part 350, a second deformation part 351, and a third deformation part 352. The deformation part 324 has a restoring force and has a function of suppressing vibration of the brush 323.

[0066] The first deforming portion 350 is provided between the second side wall surface 333b (first wall surface) of the second housing portion 333 facing the brush 323 and the brush 323. Specifically, the first deforming portion 350 is provided between the second side wall surface 333b and the surface of the brush 323 in contact with the commutator 312. The first deforming portion 350 includes a first resin portion 350a and a second resin portion 350b.

[0067] The first resin portion 350a is made of gel. The gel is, for example, a two-component curing type, an ultraviolet curing type, or a thermosetting type. In addition, the gel is injected by inserting a nozzle (not shown) of a dispenser into a recess 335 formed on the second side wall surface 333b of the second housing portion 333. The first resin portion 350a is in contact with the second side wall surface 333b.

[0068] The end of the first resin portion 350a on the commutator 312 side contacts the first protrusion 336 of the main body 321. Thus, the first resin portion 350a is restrained from moving toward the commutator 312 by the first protrusion 336. That is, the first protrusion 336 functions as a stopper that restrains the first resin portion 350a from flowing out toward the commutator 312 side.

[0069] The second resin portion 350b is in the shape of a flat plate, and is made of, for example, rubber as an elastic member having elasticity. The second resin portion 350b is harder than the first resin portion 350a. The second resin portion 350b is disposed between the brush 323 and the first resin portion 350a. The second resin portion 350b is fixed to the brush 323. The end portion of the second resin portion 350b on the commutator 312 side protrudes toward the commutator 312 side more than the end portion of the first resin portion 350a on the commutator 312 side, and supports the end portion of the first resin portion 350a on the commutator 312 side. Therefore, the end portion of the first resin portion 350a on the commutator 312 side is supported by the second resin portion 350b and is suppressed from moving toward the commutator 312 side by the first protrusion 336, while being suppressed from deforming toward the brush 323 side.

[0070] The second deformable portion 351 is provided on the commutator 312 side relative to the terminal portion 322, and is provided between the first side wall surface 333a (second wall surface) of the second housing portion 333 and the brush 323. Specifically, the second deformable portion 351 is provided between the first side wall surface 333a and the surface 323b of the brush 323 opposite to the contact surface 323a contacting the commutator 312. The second deformable portion 351 is made of gel. In addition, the second deformable portion 351 is made of a member that is easier to deform than the first deformable portion 350.

[0071] The end of the second deforming portion 351 contacts the second protrusion 337 of the main body 321, and movement toward the commutator 312 is suppressed by the second protrusion 337. That is, the second protrusion 337 functions as a stopper that suppresses the second deforming portion 351 from flowing out toward the commutator 312.

[0072] The second deformed portion 351 is provided so that the end of the second deformed portion 351 on the commutator 312 side is located closer to the commutator 312 side than the end of the first deformed portion 350 on the commutator 312 side. In other words, the second protrusion 337 is located closer to the commutator 312 side than the end of the first deformed portion 350 on the commutator 312 side. The second deformed portion 351 supports the end of the first deformed portion 350 on the commutator 312 side via the brush 323.

[0073] The third deforming portion 352 is provided on the side opposite to the second deforming portion 351 with respect to the terminal portion 322 in the radial direction. Specifically, the third deforming portion 352 is provided between the terminal portion 322 and the first side wall surface 333a of the second housing portion 333. Therefore, the terminal portion 322 is provided as a partition member that partitions the third deforming portion 352 from the second deforming portion 351. In addition, the end of the third deforming portion 352 on the opposite side of the commutator 312 is provided to extend toward the first deforming portion 350 between the terminal portion 322 and the third side wall surface 333c of the second housing portion 333. That is, the third deforming portion 352 is formed along the first side wall surface 333a and the third side wall surface 333c of the second housing portion 333. The third deforming portion 352 is provided to surround the terminal portion 322 and the brush 323 on the opposite side of the commutator 312.

[0074] The third deformation part 352 is made of gel. The third deformation part 352 may have the same components as the first resin part 350a of the first deformation part 350 or the second deformation part 351, or may be made of different components. In addition, the third deformation part 352 may be integrally formed with the first resin part 350a of the first deformation part 350. In addition, the gel constituting the second deformation part 351 and the third deformation part 352 may be injected from the recess 335 through a dispenser in the same manner as the first resin part 350a of the first deformation part 350.

[0075] The motor 3 includes a deformation portion 324, which accommodates the brush 323 in contact with the commutator 312 in the accommodating portion 331 formed in the main body 321, and contacts the first side wall surface 333a to the third side wall surface 333c of the accommodating portion 331. In addition, the main body 321 is provided with a first protrusion 336 and a second protrusion 337 protruding toward the brush 323 on the commutator 312 side of the deformation portion 324. Specifically, the main body 321 is provided with the first protrusion 336 protruding from the first side wall surface 333a toward the brush 323 and the second protrusion 337 protruding from the second side wall surface 333b toward the brush 323.

[0076] Thus, the deformed portion 324 on the commutator 312 side, specifically, the first resin portion 350a of the first deformed portion 350 contacts the first protrusion 336, and the end of the second deformed portion 351 contacts the second protrusion 337. Therefore, the motor 3 can suppress the deformed portion 324 from flowing out toward the commutator 312 side, and can suppress the deformed portion 324 from flowing out toward the contact portion between the commutator 312 and the brush 323. Therefore, the motor 3 can improve the electrical contact between the brush 323 and the commutator 312.

[0077] Furthermore, the motor 3 can attenuate the vibration of the brush 323 by providing the deformation portion 324 , thereby improving quietness.

[0078] A recess 335 is formed in the second side wall surface 333b which is a part of the wall surface of the main body 321 in contact with the deforming portion 324. The recess 335 has an opening 335a at one end 335e in the axial direction of the rotating shaft 311 of the motor 3.

[0079] Thus, the nozzle of the dispenser can be inserted into the recessed portion 335 to supply the gel to the second housing portion 333 , and the nozzle of the dispenser can be prevented from contacting the brush 323 , thereby preventing the brush 323 from being deformed.

[0080] In the axial direction of the rotating shaft 311 , one end 335 e of the recessed portion 335 forms an opening portion 335 a , and the other end 335 f of the recessed portion 335 forms an inclined surface 335 b .

[0081] Thus, when the gel is supplied from the nozzle of the dispenser, the gel can flow toward the second storage portion 333 , and the gel can be prevented from overflowing from the recessed portion 335 .

[0082] The other end 335f of the recess 335 is located at a middle portion 335c of a portion of the second side wall surface 333b in the axial direction of the rotation shaft 311. That is, the recess 335 is not formed to reach the bottom 333d of the second housing portion 333.

[0083] Thus, the gel supplied from the nozzle of the dispenser can flow from the middle portion 335c to the bottom 333d of the second receiving portion 333, and the gel supplied from the nozzle of the dispenser can be prevented from directly colliding with the bottom 333d and overflowing from the second receiving portion 333.

[0084] In addition, the first deforming portion 350 includes a first resin portion 350a in contact with the second side wall surface 333b, and a second resin portion 350b provided between the brush 323 and the first resin portion 350a and harder than the first resin portion 350a. In addition, the first protrusion 336 is located closer to the commutator 312 side than the end portion of the first resin portion 350a on the commutator 312 side. In addition, the end portion of the second resin portion 350b on the commutator 312 side is located closer to the commutator 312 side than the end portion of the first resin portion 350a on the commutator 312 side.

[0085] In this embodiment, the end of the first resin portion 350a on the commutator 312 side is supported by the second resin portion 350b, thereby preventing the end of the first resin portion 350a on the commutator 312 side from moving toward the second resin portion 350b. Therefore, the motor 3 can prevent the first resin portion 350a from flowing out toward the commutator 312 side, and can improve the electrical contact between the brush 323 and the commutator 312.

[0086] In addition, the second protrusion 337 is located closer to the commutator 312 than the end of the first deformation portion 350 on the commutator 312 side.

[0087] Thus, the end of the first deformed portion 350 on the commutator 312 side is supported by the second deformed portion 351 via the brush 323. Therefore, it is possible to suppress the end of the first deformed portion 350 on the commutator 312 side from moving toward the second deformed portion 351. Therefore, the motor 3 can suppress the first resin portion 350a from flowing out toward the commutator 312 side, thereby improving the electrical contact between the brush 323 and the commutator 312.

[0088] The second deforming portion 351 is provided between the first side wall surface 333 a and a surface 323 b of the brush 323 opposite to the contact surface 323 a that contacts the commutator 312 , and is more easily deformed than the first deforming portion 350 .

[0089] Thus, the motor 3 can suppress an increase in the force pressing the brush 323 toward the commutator 312 , reduce the contact resistance between the brush 323 and the commutator 312 , and suppress vibration of the brush 323 .

[0090] Furthermore, the third deforming portion 352 is formed so as to surround the end portion of the brush 323 on the opposite side to the commutator 312 .

[0091] Thus, the motor 3 can suppress the vibration of the brush 323 from being transmitted to the main body 321 , thereby improving quietness.

[0092] The deformed portion 324 has a restoring force.

[0093] Thus, the motor 3 can suppress vibration of the brush 323 and improve quietness.

[0094] The deforming portion 324 is formed so as to contact the other end portion 341 of the terminal portion 322 and the first to third side wall surfaces 333 a to 333 c of the second housing portion 333 .

[0095] Thus, the motor 3 can suppress the vibration of the brush 323 from being transmitted to the main body 321 via the terminal portion 322 , thereby improving quietness.

[0096] In addition, the bracket body 321 (body 321) of the motor 10 may be Fig.12 and Fig.13 The bracket body portion 3210 (hereinafter, the body portion 3210) is shown. Fig.12 is a perspective view of a bracket body 3210 according to a modified example. Fig.13 3 is a perspective view of a bracket 3200 according to a modification. In the following, the main body 3210 and the bracket 3200 according to the modification are described in terms of their differences from the main body 321 and the bracket 32 ​​described above, and the same parts are denoted by the same reference numerals and their description is omitted as appropriate.

[0097] The bracket 3200 includes a bearing plate 320 , a pair of terminal portions 322 , a pair of brushes 323 , and a pair of deforming portions 324 . The bracket 3200 includes a main body portion 3210 instead of the main body portion 321 , and further includes a pair of resin portions 400 .

[0098] The main body 3210 is provided with a commutator 312 (see Figure 6 ) and a pair of receiving portions 331 for receiving the terminal portion 322, a part of the brush 323 and the deforming portion 324. In addition, a pair of storage portions 410 for storing a pair of resin portions 400 are formed in the main body portion 3210.

[0099] The housing portion 331 is formed by a first housing portion 332 and a second housing portion 333. The deformation portion 324 is accommodated in the second housing portion 333. The deformation portion 324 includes a first deformation portion 350, a second deformation portion 351, and a third deformation portion 352. The first deformation portion 350 includes a first resin portion 350a and a second resin portion 350b. The deformation portion 324 has a restoring force and has a function of suppressing vibration of the brush 323.

[0100] The main body 3210 is similar to the main body 321, and includes a first protrusion 336 and a second protrusion 337. The first protrusion 336 and the second protrusion 337 are formed at the end of the second housing portion 333 on the commutator 312 side. The first protrusion 336 and the second protrusion 337 are formed to face each other. The first protrusion 336 functions as a stopper to prevent the first resin portion 350a from flowing out toward the commutator 312 side. The second protrusion 337 functions as a stopper to prevent the second deformed portion 351 from flowing out toward the commutator 312 side.

[0101] Furthermore, in the main body 3210, a recessed portion (hereinafter referred to as a storage portion) 410 is formed in the second side wall surface 333b of the second housing portion 333, which is recessed in a direction away from the first side wall surface 333a. The storage portion 410 includes a slit-shaped communication portion 410a formed in the second side wall surface 333b and a cylindrical third housing portion 410b connected to the communication portion 410a so as to communicate with the second housing portion 333. The communication portion serves as a passage or a passage.

[0102] The resin portion 400 stored in the storage portion 410 is composed of the same gel as the first resin portion 350a. The gel is injected by inserting a nozzle (not shown) of a dispenser into the third receiving portion 410b. As a result, the third receiving portion 410b and the connecting portion 410a are filled with gel to form the resin portion 400. Then, by continuing to inject gel from the nozzle, the gel further flows into the second receiving portion 333 to form the first resin portion 350a.

[0103] The resin portion 400 functions as a supply source to prevent the gel constituting the first resin portion 350a from drying up. In addition, the resin portion 400 can attenuate the vibration of the brush 323 that is not completely attenuated by the first resin portion 350a. Therefore, the bracket 3200 involved in the modified example can reliably suppress the vibration of the brush 323 from being transmitted to the main body 3210 via the terminal portion 322, and can improve the quietness.

[0104] In addition, if Figures 14 to 16 As shown, the motor 10 may also be a motor using a pair of carbon brushes 113 . Fig.14 It is a front view of the motor 10 according to the modification. Fig.15 It is a perspective view of a motor 10 according to a modified example. Fig.16 yes Fig.14 XIV-XIV section view.

[0105] Specifically, the main body 100 of the motor 10 according to the modification example includes a first protrusion 101 and a second protrusion 102 protruding toward the brush 113. In addition, the main body 100 of the motor according to the modification example includes a third protrusion 103 protruding toward the brush 113 from a bottom 103a (bottom surface) connecting a first side wall surface 101a protruding from the first protrusion 101 and a second side wall surface 102a protruding from the second protrusion 102.

[0106] The third protrusion 103 is formed at the end of the second housing portion 110 on the commutator 111 side. The first to third protrusions 101 to 103 are formed continuously. That is, the third protrusion 103 is formed to connect the first protrusion 101 and the second protrusion 102.

[0107] The bottom portion 103a is an inclined surface that is inclined so that the height increases toward the third protrusion 103. That is, the bottom portion 103a is formed to slope downward from the third protrusion 103 side.

[0108] The motor 100 according to the modification example can suppress the deformed portion 112 from flowing out toward the commutator 111 by the third protrusion 103. Therefore, the motor 100 according to the modification example can improve the electrical contact between the brush 113 and the commutator 111.

[0109] In addition, the motor 100 according to the modification example includes a bottom 103a that increases in height as it approaches the third protrusion 103. Thus, the motor 100 according to the modification example can suppress the deformed portion 112 from flowing out toward the commutator 111. Therefore, the motor 100 according to the modification example can further improve the electrical contact between the brush 113 and the commutator 111.

[0110] Furthermore, the third protrusion may be provided in the motor 3 according to the above-described embodiment.

[0111] In addition, the present invention is not limited to the above-mentioned embodiment. The structure formed by appropriately combining the above-mentioned constituent elements is also included in the present invention. In addition, further effects and modifications can be easily derived by those skilled in the art. Therefore, the wider aspects of the present invention are not limited to the above-mentioned embodiment, and various changes can be made.

[0112] Description of Reference Numerals

[0113] 1…rotating device; 3…motor; 4…gear train (gear mechanism); 30…frame; 31…armature; 32…bracket; 100…motor; 101…first protrusion; 102…second protrusion; 103…third protrusion; 103a…bottom (bottom surface); 311…rotating shaft; 312…commutator; 320…bearing plate; 321…bracket; 322…terminal part; 323…brush; 324…deformation part; 331…accommodation part; 332…first accommodation part; 333…second accommodation part Container; 333a…first side wall surface (second wall surface); 333b…second side wall surface (first wall surface); 333c…third side wall surface; 335…recess; 335a…opening; 335c…middle portion; 336…first protrusion; 337…second protrusion; 340…one end portion; 341…the other end portion; 342…bend portion; 350…first deformation portion; 350a…first resin portion; 350b…second resin portion; 351…second deformation portion; 352…third deformation portion.

Claims

1. A motor, wherein: have: A commutator, disposed on the rotating shaft; a brush in contact with the commutator; a bracket having a wall surface opposing the brush; and The deformable portion contacts the brush and the wall surface and has a first resin portion. The first resin portion is composed of gel, The bracket includes a protruding portion provided on the commutator side relative to the deforming portion. The protrusion protrudes from the wall surface toward the brush, In the radial direction, an end portion of the deformed portion on the commutator side is in contact with the protruding portion.

2. The motor according to claim 1, wherein: A recessed portion is provided in a portion of the wall surface in contact with the deformable portion.

3. The motor according to claim 2, wherein: One of the two end portions of the recessed portion in the axial direction of the rotating shaft forms an opening of the bracket, and the other end portion forms an inclined surface.

4. The motor according to claim 2, wherein: The other end of the recessed portion is located at a middle portion of a portion of the wall surface in the axial direction of the rotating shaft.

5. The motor according to any one of claims 1 to 4, wherein: The deformation portion comprises: The first resin portion is in contact with the wall surface; and a second resin portion provided between the brush and the first resin portion and being harder than the first resin portion, An end portion of the second resin portion on the commutator side is located closer to the commutator than an end portion of the first resin portion on the commutator side. The protruding portion is located closer to the commutator than an end portion of the first resin portion on the commutator side.

6. The motor according to any one of claims 1 to 4, wherein: The deformation portion comprises: a first deforming portion having the first resin portion formed of gel and provided between a first wall surface of the bracket facing the brush and the brush; and A second deformation portion is provided between a second wall surface of the bracket opposite to the first wall surface and the brush, The bracket has: a first protrusion protruding from the first wall surface toward the brush and disposed on the commutator side relative to the first deforming portion; and The second protrusion protrudes from the second wall surface toward the brush and is provided on the commutator side with respect to the second deformation portion.

7. The motor according to claim 6, wherein: The second protrusion is located closer to the commutator than an end portion of the first deformation portion on the commutator side.

8. The motor according to claim 6, wherein: The second deformable portion is provided between the second wall surface and a surface of the brush opposite to a contact surface that contacts the commutator, and is more easily deformed than the first deformable portion.

9. The motor according to any one of claims 1 to 4, wherein: The deformed portion surrounds an end portion of the brush on the opposite side to the commutator.

10. The motor according to any one of claims 1 to 4, wherein: The deformed portion has a restoring force.

11. The motor according to any one of claims 1 to 4, wherein: The motor includes a terminal portion having one end, another end to which the brush is mounted, and a bent portion formed between the one end and the other end. The bracket includes a housing portion that houses the terminal portion and has the wall surface. The deformable portion contacts the other end portion and the wall surface.

12. The motor according to claim 1, wherein The bracket has a bottom surface connecting two wall surfaces facing the brushes. The protrusion protrudes from the wall surface and the bottom surface toward the brush.

13. The motor according to claim 12, wherein: The bottom surface is an inclined surface that is inclined so that the height on the protruding portion side becomes higher.

14. The motor according to any one of claims 1 to 4, wherein: A lubricant is provided between the brush and the commutator as a member different from the resin portion.

15. A rotating device, wherein: have: The motor according to any one of claims 1 to 14; A worm gear mounted on the rotating shaft; and A gear meshing with the worm gear.

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