Motor

Abstract

To realize downsizing.SOLUTION: A motor comprises a frame, a bracket, a brush, a cover, and an electronic component. The bracket comprises a first part stored in the frame, and a second part protruding toward the cover from the first part. The second part is stored by the cover. The brush is arranged at the first part of the bracket. The electronic component is arranged at the second part of the bracket.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a motor.

Background Art

[0002] In a rotating electrical machine such as a motor, in order to take EMC (Electromagnetic Compatibility) measures, it is known to mount electronic components such as a choke coil and a PTC thermistor inside the rotating electrical machine.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in order to protect the electronic components from vibrations of the motor and the like, it is necessary to secure a large space, so the miniaturization of the motor may be hindered.

[0005] On one aspect, an object is to provide a motor capable of achieving miniaturization.

Means for Solving the Problems

[0006] In one aspect, the motor includes a frame, a bracket, a brush, a bearing, a shaft, a cover, a first and an electronic component. , a substrate, The bracket includes a first portion housed in the frame and a second portion protruding from the first portion toward the cover. , a side wall continuously formed from the first portion to the second portion, The second portion is housed in the cover. The shaft is supported by the bearing on the bracket. The brush is disposed on the first portion of the bracket. Thea first The electronic component is on the second part of the bracket accommodation to be mounted A first terminal is disposed on the second portion of the bracket. An opening is formed in the side wall of the cover facing the side wall of the bracket and opening toward the first terminal. In the radial direction, the first terminal and the first electronic component are arranged side by side in the bracket. The substrate is electrically connected to the first electronic component. The substrate is fixed to the end face on the cover side of the second portion. The side wall of the cover includes an engaging portion. The side wall of the bracket includes an engaged portion that engages with the engaging portion. The frame and the cover are engaged. In another aspect, the motor includes a bracket, a brush, a cover, and a first electronic component. The bracket includes a first portion accommodated in the frame and a second portion protruding from the first portion toward the cover. The second portion is accommodated in the cover. The brush is disposed on the first portion of the bracket. The first electronic component is disposed on the second portion of the bracket. An encoder is provided on the inner surface of the cover. The side wall of the cover includes a first opening and a second opening facing the terminal of the encoder. The frame and the cover are engaged.

[0007] According to one aspect, miniaturization can be achieved

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

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Figure 10

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Figure 18

[0009] Hereinafter, embodiments of the motor disclosed in the present application will be described in detail with reference to the drawings. Note that the dimensional relationships of the respective elements in the drawings, the ratios of the respective elements, etc. may be different from the actual ones. There may also be portions where the dimensional relationships and ratios are different between the drawings. In each drawing, for the sake of easy understanding of the explanation, there may be illustrated a coordinate system in which the direction in which the shaft 91 described later extends is the axial direction, and the directions in which the side walls 22 of the bracket 20 are formed are the first direction and the second direction, respectively. More specifically, the direction in which the shaft 91 protrudes from the frame 10 is the positive axial direction side, and in the bracket 20, in the first direction, the side on which the terminal arrangement portion 23 is formed is the positive first direction side, and in the second direction, the side on which the PTC 36 is arranged is the positive direction side.

[0010] (First Embodiment) First, the motor in the present embodiment will be described. FIG. 1 is a perspective view showing an example of a motor in the first embodiment. FIG. 2 is an exploded perspective view showing an example of a motor in the first embodiment. FIG. 3 is a partial cross-sectional view showing an example of a motor in the first embodiment. FIG. 4 is a side cross-sectional view showing an example of a motor in the first embodiment. FIG. 3 shows a partial cross-section when cut along the plane P1 shown in FIG. 1. FIG. 4 shows a cross-section cut along the line A-A in FIG. 3.

[0011] As shown in FIGS. 1 and 2, the motor 1 in this embodiment includes a frame 10, a bracket 20, a substrate 50, a cover 40, and a shaft 91. The shaft 91 is inserted through a through hole 11 of the frame 10 and a through hole 41 of the cover 40. In FIG. 2, the illustration of the shaft 91 is omitted.

[0012] In the first embodiment, the frame 10 is made of, for example, a metal plate material such as stainless steel. As shown in FIG. 2, the frame 10 includes a through hole 11, a side wall 12, and an opening 13.

[0013] The through hole 11 is formed at the end of the frame 10 on the positive side in the axial direction, and the shaft 91 shown in FIG. 1 is inserted therethrough. The opening 13 is formed at the end of the frame 10 on the negative side in the axial direction and is closed by the bracket 20 shown in FIG. 2.

[0014] Also, a cover 40 is engaged with the opening 13. In the first embodiment, the side wall 12 on the opening 13 side (negative side in the axial direction) of the frame 10 is formed so that its thickness (size in the radial direction) is smaller than that of other parts, as shown in FIG. 2. In this case, a caulking portion 19 that engages with the cover 40 is formed at a part of the side wall 12 on the opening 13 side, as shown in FIG. 1.

[0015] As shown in FIGS. 3 and 4, the frame 10 houses a shaft 91, an armature core 94, a commutator 95, and a coil 96. The shaft 91 is supported by the through hole 11 of the frame 10 via a bearing 92 on the positive axial direction side, and is supported by the bracket 20 via a bearing 93 on the negative axial direction side. The armature core 94 is salient poles that project radially and are attached to the shaft 91. The coil 96 is formed by a wire wound around the armature core 94. The armature core 94 around which the coil 96 is wound rotates about the shaft 91 as the rotation axis. The commutator 95 is attached to the shaft 91 and connected to the coil 96. In FIGS. 4 and below, the illustration of the coil 96 may be omitted.

[0016] Various electronic components, terminals, etc. are mounted on the bracket 20. FIG. 5 is a perspective view showing an example of the bracket in the first embodiment. FIG. 6 is a front view showing an example of the bracket in the first embodiment. As shown in FIGS. 5 and 6, the bracket 20 is formed with a through hole 21, a side wall 22, a terminal arrangement portion 23, an engaged concave portion 24, a substrate holding portion 25, a PTC housing portion 26, a brush holder 27, and a coil housing portion 28. The PTC housing portion 26 and the coil housing portion 28 are examples of housing portions, and the engaged concave portion 24 is an example of an engaged portion.

[0017] In the first embodiment, the dimension of the bracket 20 in the radial direction is formed to be slightly smaller than the inner dimension of the frame 10 and the inner dimension of the cover 40. In this case, a part of the bracket 20 in the axial direction is housed in the frame 10. Also, a part of the bracket 20 on the cover 40 side, for example, on the negative axial direction side, is housed in the cover 40. In this case, as shown in FIG. 1, the bracket 20 is housed inside the frame 10 and the cover 40 and is not visible from the outside. Hereinafter, the part of the bracket 20 housed in the frame 10 may be denoted as the first part 2a, and the part of the bracket 20 housed in the cover 40 may be denoted as the second part 2b.

[0018] In the first embodiment, as shown in FIGS. 5 and 6, the terminal arrangement portion 23, the substrate holding portion 25, and the coil accommodating portion 28 are formed in the second portion 2b, and the PTC accommodating portion 26 and the brush holder 27 are formed in the first portion 2a. Further, the through hole 21 is formed so as to penetrate the first portion 2a and the second portion 2b, and the shaft 91 is inserted therethrough. An engaged concave portion 24 is formed in the side wall 22. In the first embodiment, the side wall 22 of the bracket 20 accommodated in the frame 10 and the cover 40 faces either the side wall 12 of the frame 10 or the side wall 42 of the cover 40 shown in FIG. 2 in the radial direction.

[0019] In the first embodiment, the engaged concave portion 24 is formed, for example, at positions on a pair of side walls 22 facing each other in the second direction, for example, at the position shown by the line A-A in FIG. 3. A part of the engaged concave portion 24 is formed from the second portion 2b to the first portion 2a as shown in FIG. 5. In other words, the engaged concave portion 24 is formed in both the first portion 2a and the second portion 2b.

[0020] The terminal arrangement portion 23 is formed on either side wall 22 of the bracket 20, for example, on the positive side in the first direction. The terminal arrangement portion 23 has, for example, a pair of notches 23a and 23b formed in the radial direction (negative side in the first direction) from the side wall 22. A pair of power supply terminals 31a and 31b are respectively arranged in the pair of notches 23a and 23b. FIG. 7 is a rear view showing an example of the bracket in which the power supply terminals in the first embodiment are arranged. An external terminal T1, which is an external terminal of the external device shown in FIG. 1, is connected to the power supply terminal 31 shown in FIG. 7 through the notches 23a and 23b and an opening 46 of the cover 40 described later. In the following, when expressing the power supply terminals 31a and 31b without distinction, they may be simply referred to as "power supply terminal 31". Further, the power supply terminal 31 is an example of the first terminal.

[0021] The substrate 50 is fixed to the substrate holding portion 25. The substrate holding portion 25 is, for example, a pair of protrusions. In the first embodiment, as shown in FIG. 2, the substrate 50 is disposed on the cover 40 side, that is, on the negative axial direction side with respect to the bracket 20.

[0022] The PTC housing portion 26 houses a PTC 36 and a PTC terminal 38, which will be described later. The brush holder 27 houses a pair of brushes 37. The coil housing portion 28 is, for example, a pair of recesses formed from the end face on the negative axial direction side of the bracket 20 toward the positive axial direction side, and houses a pair of choke coils 58 mounted on the substrate 50. Note that the choke coil 58 is an example of an electronic component. Further, flat terminals 32a and 32b, which will be described later, are further mounted on the first portion 2a of the bracket 20. In the following, when the pair of brushes 37 are separately described, they may be denoted as brushes 37a and 37b, respectively. Similarly, when the pair of choke coils 58 are separately described, they may be denoted as choke coils 58a and 58b, respectively. Also, in the first embodiment, in order to axially penetrate a part of the PTC terminal 38 and the flat terminals 32a and 32b from the first portion 2a to the second portion 2b, through holes are formed in the bracket 20 in addition to the through hole 21.

[0023] Next, the electronic components and the like mounted on the bracket 20 will be described with reference to FIGS. 8 to 12. FIG. 8 is a front view showing an example of a bracket on which electronic components according to the first embodiment are mounted.

[0024] The power supply terminal 31 supplies power from the external terminal T1 to various electronic components and the like mounted on the bracket 20. For example, the power supply terminal 31a is connected to the choke coil 58a via the substrate 50 shown in FIG. 9. FIG. 9 is a front view showing an example of a substrate in the first embodiment. FIG. 10 is a rear view showing an example of a bracket on which the substrate in the first embodiment is mounted. As shown in FIGS. 9 and 10, the substrate 50 includes a through hole 51, patterns 52 to 55, a pair of choke coils 58, and an engaged portion 59. A shaft 91 is inserted into the through hole 51. The engaged portion 59 is engaged with the substrate holding portion 25 of the bracket 20. The engaged portion 59 is, for example, a pair of through holes, but is not limited thereto, and may be a concave portion or the like. Further, as shown in FIG. 10, the substrate 50 may be formed with a notch conforming to the shape of the engaged concave portion 24 of the bracket 20.

[0025] In the first embodiment, the pair of choke coils 58 reduce noise of a specific frequency, for example, as an inductor. The pair of choke coils 58 are fixed, for example, to the positive direction side in the axial direction of the substrate 50 by soldering, and are connected to terminals, electronic components, and the like mounted on the bracket 20 via the patterns 52 to 55. In the first embodiment, the choke coil 58a connected to the power supply terminal 31a via the pattern 52 is connected to the flat terminal 32a via the pattern 53. Note that the choke coil 58 may be an EMC (Electromagnetic Compatibility) countermeasure component that reduces noise of a specific frequency, and for example, other electronic components such as a capacitor or an inductor may be used.

[0026] In the first embodiment, the pair of choke coils 58 project from the substrate 50 toward the positive axial direction side and are accommodated in the coil accommodating portion 28 of the bracket 20. That is, as shown in FIG. 4, the pair of choke coils 58 are located on the positive axial direction side rather than the end portion on the negative axial direction side of the bracket 20. Further, as shown in FIG. 5, the coil accommodating portion 28 in which the pair of choke coils 58 are accommodated is formed at a position overlapping in the radial direction with the terminal arrangement portion 23. That is, the pair of choke coils 58 are arranged side by side in the radial direction with the pair of power supply terminals 31. Further, the choke coil 58 faces the pair of power supply terminals 31 in the radial direction via the partition wall 29 in the bracket 20. According to such a configuration, the size in the axial direction of the motor 1 can be reduced.

[0027] The flat plate terminal 32a shown in FIG. 8 electrically connects the choke coil 58a and the brush 37a attached to the brush holder 27 via the pigtail 33a. The brushes 37a and 37b are arranged such that the tip portions thereof come into contact with the commutator 95. By supplying power to the commutator 95 via the brushes 37a and 37b, the motor 1 rotates.

[0028] The brush 37b is connected to the PTC 36 via the pigtail 33b and the flat plate terminal 32b. The PTC 36 in the first embodiment is an electronic component that changes its electrical resistance according to a change in temperature. Note that the PTC 36 is an example of a second electronic component.

[0029] In the first embodiment, the PTC 36 and the PTC terminal 38 are accommodated in the PTC accommodating portion 26 of the bracket 20. In this case, a part of the PTC terminal 38 is accommodated so as to support the PTC 36 from the positive axial direction side. Note that the PTC terminal 38 is an example of a second terminal.

[0030] FIG. 11 is a perspective view showing an example of the PTC terminal in the first embodiment. FIG. 12 is an enlarged cross-sectional view showing an example of the bracket in the first embodiment. FIG. 12 shows a cross-section taken along line B-B in FIG. 8. As shown in FIG. 11, the PTC terminal 38 has a main body portion 38a that contacts the PTC 36, a connection portion 38b that penetrates the second portion 2b and is connected to the substrate 50, and a protruding portion 38c that protrudes in the positive axial direction.

[0031] As shown in FIG. 12, when the PTC terminal 38 is housed in the PTC housing portion 26, the protruding portion 38c is arranged to face the end portion 36c on the positive axial direction side of the PTC 36 in the axial direction. Further, the connection portion 38b of the PTC terminal 38 is fixed by being soldered to the substrate 50. According to such a configuration, the dropout of the PTC 36 due to the vibration of the motor 1 or the like can be suppressed. Note that the protruding portion 38c and the end portion 36c on the positive axial direction side of the PTC 36 face each other with a gap therebetween, preventing the PTC 36 from moving when vibrations or the like occur. However, the protruding portion 38c and the end portion 36c on the positive axial direction side of the PTC 36 may be in contact with each other, and the protruding portion 38c may support the end portion 36c on the positive axial direction side of the PTC 36.

[0032] Then, the PTC terminal 38 is connected to the choke coil 58b via the pattern 54 of the substrate 50. The choke coil 58b is connected to the power supply terminal 31b via the pattern 55 of the substrate 50.

[0033] In the first embodiment, the second portion 2b of the bracket 20 and the substrate 50 fixed to the second portion 2b are housed in the cover 40 as shown in FIG. 4. FIG. 13 is a perspective view showing an example of the cover in the first embodiment. As shown in FIGS. 2 and 13, the cover 40 in the first embodiment includes a through hole 41, a side wall 42, an engaging convex portion 43, a recess 44, and an opening 46. Note that the opening 46 is an example of the first opening, and the engaging convex portion 43 is an example of the engaging portion.

[0034] In the first embodiment, the dimension between the mutually facing side walls 42 of the cover 40 is formed to be substantially the same as the dimension between the mutually facing side walls 12 of the frame 10. That is, the side walls 42 of the cover 40 are substantially flush with the portions of the side walls 12 of the frame 10 other than the caulking portion 19 shown in FIG. 1.

[0035] The through hole 41 is formed at the end portion on the negative axial direction side of the cover 40, and the shaft 91 is inserted therethrough. The engaging convex portion 43 and the concave portion 44 are formed on the side wall 42. In the first embodiment, as shown in FIGS. 2 and 4, the engaging convex portion 43 is formed to project continuously from the concave portion 44 toward the positive axial direction side.

[0036] As shown in FIG. 4, the engaging convex portion 43 and the concave portion 44 are formed at positions axially opposed to the engaged concave portion 24 of the bracket 20, that is, on the line A-A in FIG. 3. In this case, in FIG. 4 showing the cross section taken along the line A-A in FIG. 3, for the sake of convenience, the side wall 42 is shown by a broken line.

[0037] In such a configuration, the bracket 20 and the cover 40 are engaged with each other when the engaging convex portion 43 of the cover 40 engages with the engaged concave portion 24 of the bracket 20. In this case, as shown in FIG. 2, the opening 46 of the cover 40 is formed at a position radially opposed to the terminal arrangement portion 23 of the bracket 20. According to such a configuration, the opening 46 serves as an insertion port for the external terminal T1 to the power supply terminal 31 arranged in the terminal arrangement portion 23.

[0038] Also, as shown in FIGS. 13 and 4, the outer peripheral surface of the engaging convex portion 43 is formed radially inward by a width G1 from the side wall 42 and the side wall 12 of the frame 10. That is, the dimension between the engaging convex portions 43 facing each other is smaller than the dimension between the side walls 42 facing each other. Thereby, the engaging convex portion 43 engages with the opening 13 of the frame 10 as shown in FIG. 4. In this case, a part of the opening 13 of the frame 10 protrudes toward the negative axial direction side from the engaging convex portion 43 of the cover 40 as shown in FIG. 4. Then, the caulking portion 19 is formed by caulking the protruding portion of the opening 13 radially toward the concave portion 44 of the cover 40. Note that the caulking portion 19 is an example of a part on the opening side of the frame.

[0039] As described above, the motor 1 in the first embodiment includes a frame 10, a bracket 20, a brush 37, a cover 40, and an electronic component 58. The bracket 20 includes a first portion 2a housed in the frame 10 and a second portion 2b protruding from the first portion 2a toward the cover 40. The second portion 2b is housed in the cover 40. The brush 37 is disposed on the first portion 2a of the bracket 20. The electronic component 58 is disposed on the second portion 2b of the bracket 20. According to such a configuration, miniaturization of the motor 1 can be achieved.

[0040] Also, in the first embodiment, the power supply terminal 31 connected to the external terminal T1 is included in the cover 40 and the bracket 20. In this case, the power supply terminal 31 serves as a female terminal connected via the opening 46 of the cover 40 and the terminal arrangement portion 23 of the bracket 20. The external terminal T1, which is a male terminal, is inserted into the power supply terminal 31 from the outside in the radial direction. According to such a configuration, it is possible to suppress the power supply terminal 31 of the motor 1 from protruding to the outside of the cover 40.

[0041] (Second Embodiment) The shape of the cover that engages with the frame 10 and the bracket 20 is not limited to that shown in the first embodiment, and other components such as an encoder may be housed in the cover. In each of the following modifications and embodiments, the same parts as those shown in the drawings described above are denoted by the same reference numerals, and redundant descriptions are omitted. The encoder in the second embodiment includes, for example, an encoder substrate 71, an encoder terminal 72, a rotation detection element 73, and an encoder magnet 97, which will be described later.

[0042] As shown in FIG. 14, the motor 2 in the second embodiment includes a frame 10, a bracket 20, a substrate 50, a shaft 91, and a cover 60. FIG. 14 is an exploded perspective view showing an example of the motor in the second embodiment. FIG. 15 is a perspective view showing an example of the cover in the second embodiment. As shown in FIGS. 14 and 15, the cover 60 in the second embodiment further includes an opening 67, a terminal arrangement portion 68, and an encoder substrate holding portion 69 in addition to a through hole 41, a side wall 62, an engagement convex portion 63, a concave portion 64, and an opening 46. The opening 67 is an example of a second opening.

[0043] The engagement convex portion 63 and the concave portion 64 have substantially the same shape as the engagement convex portion 43 and the concave portion 44 in the first embodiment, and are formed at substantially the same positions. Thereby, the cover 60 can be engaged with the frame 10 and the bracket 20 in the same manner as the cover 40.

[0044] The encoder substrate 71 shown in FIG. 16 is mounted on the encoder substrate holding portion 69. FIG. 16 is a front view showing an example of the cover on which the encoder substrate in the second embodiment is mounted. The rotation detection element 73 mounted on the encoder substrate 71 detects information regarding the rotation of the shaft 91, such as the rotation angle or rotational speed of the shaft 91, using the magnetic flux of the encoder magnet 97. The rotation detection element 73 may be a known rotation detection element such as a Hall element or a Hall IC.

[0045] In the second embodiment, as shown in FIG. 17, the encoder magnet 97 is disposed at a position axially opposed to the rotation detection element 73 mounted on the encoder substrate 71. FIG. 17 is a partial cross-sectional view showing an example of the motor in the second embodiment. FIG. 18 is a side cross-sectional view showing an example of the motor in the second embodiment. FIG. 18 shows a cross-section taken along line C-C of FIG. 17. The encoder magnet 97 is disposed axially between the substrate 50 and the cover 60. The encoder magnet 97 is mounted on the shaft 91 and rotates in conjunction with the shaft 91. Note that the rotation detection element 73 is not shown in the cross-sectional view shown in FIG. 18.

[0046] An encoder terminal 72 connected to the encoder substrate 71 is disposed in the terminal arrangement portion 68. As shown in FIG. 16, the encoder terminals 72a and 72b disposed in the pair of terminal arrangement portions 68a and 68b extend into the opening 67, respectively. In this case, the encoder terminal 72 serves as a female terminal connected via the opening 67 of the cover 60. In such a configuration, as shown in FIG. 14, the external terminal T2, which is a male terminal, is connected to the encoder terminal 72 and the power supply terminal 31 from the radially outer side. Note that the external terminals T1 and T2 are examples of the terminals of an external device. Also, although the external terminal T2 is connected to both the opening 46 and the opening 67, another external terminal may be connected to each of them.

[0047] As described above, the motor 2 in the second embodiment includes the cover 60. An encoder substrate 71 is provided inside the cover 60. The side wall 62 of the cover 60 includes an opening 46 as a first opening and a second opening 67 facing the terminal 72 of the encoder substrate 71. According to such a configuration, changes in the components such as the encoder can be easily realized by changing the cover.

[0048] Note that the components accommodated in the cover 60 are not limited to the encoder, and other terminals and electronic components may be used.

[0049] [Modification Example] Although the configurations in the above embodiments have been described, the embodiments are not limited thereto. For example, the motor is not limited to those shown in the embodiments, and may be a brushless motor or the like. Further, the position where the engaged concave portion 24 or the like is formed is not limited to that shown in the embodiments, and can be formed at any position as long as it can be engaged with the cover 40 or 60. Further, the electronic components accommodated by the motor in each embodiment are not limited to the choke coil 58 and the PTC 36, and may be any electronic components such as other sensors and communication devices. Further, the cross-sections of the frame 10, the bracket 20, and the covers 40 and 60 may be other shapes such as a substantially circular shape in addition to the substantially rectangular shape shown in the embodiments.

[0050] Although the present invention has been described based on the embodiments and the modification examples, it goes without saying that the present invention is not limited to the embodiments and the modification examples, and various changes can be made without departing from the gist of the present invention. It is obvious to those skilled in the art from the description of the claims that those with various changes made without departing from such gist are also included in the technical scope of the present invention.

Explanation of Reference Numerals

[0051] 1,2 Motor, 10 Frame, 11 Through Hole, 12 Side Wall, 13 Opening, 19 Caulked Portion, 20 Bracket, 21 Through Hole, 22 Side Wall, 23 Terminal Arrangement Portion, 24 Engaged Concave Portion, 25 Substrate Holding Portion, 26 PTC Accommodation Portion, 27 Brush Holder, 28 Coil Accommodation Portion, 2a First Portion, 2b Second Portion, 31a,31b Power Supply Terminals, 32a,32b Flat Terminals, 33a,33b Pigtails, 36 PTC, 37a,37b Brushes, 38 PTC Terminals, 40,60 Covers, 41 Through Hole, 42,62 Side Walls, 43,63 Engaging Protrusions, 44,64 Recesses, 46,67 Openings, 68 Terminal Arrangement Portion, 69 Encoder Substrate Holding Portion, 50 Substrate, 51 Through Hole, 52~55 Patterns, 58 Choke Coil, 59 Engaged Portion, 71 Encoder Substrate, 72 Encoder Terminals, 91 Shaft, 92,93 Bearings, 94 Armature Core, 95 Commutator, 96 Coil, 97 Encoder Magnet, T1,T2 External Terminals

Claims

1. A frame, a bracket, a bearing, a shaft supported by the bracket via the bearing, a brush, a cover, a first electronic component, a substrate, comprising: The bracket includes a first portion housed in the frame, a second portion protruding from the first portion toward the cover, and a side wall continuously formed from the first portion to the second portion. The second portion is housed in the cover. The brush is disposed on the first portion of the bracket. The first electronic component is housed in the second portion of the bracket. A first terminal is disposed on the second portion of the bracket. An opening is formed in the side wall of the cover facing the side wall of the bracket, the opening opening toward the first terminal. In the radial direction, the first terminal and the first electronic component are arranged side by side in the bracket. The substrate is electrically connected to the first electronic component. The substrate is fixed to the end face on the cover side of the second portion. The side wall of the cover includes an engaging portion. The side wall of the bracket includes an engaged portion that engages with the engaging portion. The frame and the cover are engaged. Motor.

2. A second electronic component housed in the first portion of the bracket, and a second terminal disposed on the first portion of the bracket and connecting the first terminal and the second electronic component. comprising: A terminal of an external device is connected to the first terminal through the opening. The second terminal includes a protruding portion protruding toward the second electronic component. In the axial direction, the portion of the second electronic component on the frame side faces the protruding portion. The motor according to claim 1.

3. An encoder is provided on the inner surface of the cover. The side wall of the cover includes the opening as a first opening and a second opening facing the terminal of the encoder. The motor according to claim 1 or 2.

4. The first electronic component reduces noise of a specific frequency. The motor according to any one of claims 1 to 3.

5. The engaging portion of the cover is a convex portion protruding toward the side wall of the bracket. The engaged portion of the bracket is a concave portion. The convex portion of the cover and the concave portion of the bracket are engaged. The motor according to any one of claims 1 to 4.

6. The outer peripheral surface of the convex portion of the cover has a concave portion. A part of the frame on the side of the first opening engages with the recess of the cover. The motor according to claim 5.

7. A commutator that contacts the brush, An armature core, A coil, The motor according to any one of claims 1 to 6, comprising:

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