Motor and vehicle

Abstract

This motor comprises: a motor body having a stator and a rotor that rotates about a rotation axis extending in the vertical direction; a frame that accommodates the motor body; a housing positioned above the motor body; a control board having a control unit that controls the motor body and positioned above the housing; a connector that is electrically connected to the control unit and that is fixed to the frame; a cover that covers the control unit; a first waterproof unit that seals a first boundary part, which is a boundary part between the frame and the cover, and that has waterproofness; and a second waterproof unit that seals a second boundary part, which is a boundary part between the connector and the frame, and that has waterproofness. Each of the first boundary part and the second boundary part has an annular shape when viewed from the vertical direction.

Description

Motors and vehicles

[0001] The present disclosure relates to a motor and a vehicle.

[0002] Conventionally, motors used in electric power steering devices attached to vehicles have been known. Patent Document 1 discloses a motor having a configuration in which multiple components (such as a housing, a connector, and a cover) are exposed to the outside. In this motor, waterproofing is ensured by disposing a waterproof adhesive (waterproof portion) in gaps (boundaries) formed between the components.

[0003] Japanese Patent Application Laid-Open No. 2020-167894

[0004] In the motor of Patent Document 1, the boundaries of the housing, connector, and cover overlap each other, resulting in complex shapes of gaps formed between the components, which could lead to a decrease in the reliability of the airtight structure and increase the effort required for the process of applying adhesive to the boundaries.

[0005] Furthermore, in order to bring the connector closer to the center of the motor, the motor of Patent Document 1 is premised on a configuration in which the connector is fixed to the housing and becomes part of the housing (a so-called front-connector configuration), which may limit the layout of the product (e.g., vehicle) in which the motor is installed.

[0006] The present disclosure has been made in consideration of these circumstances, and aims to provide a motor and a vehicle that are capable of positioning a waterproof section at the boundary between the components that make up the motor at low cost and with high quality, without compromising the freedom of layout of the product in which the motor is installed.

[0007] In order to solve the above problem, the motor according to aspect 1 of the present disclosure comprises a motor body having a stator and a rotor that rotates around a rotation axis extending in the vertical direction, a frame that accommodates the motor body, a housing located above the motor body, a control board located above the housing and having a control unit that controls the motor body, a connector that is electrically connected to the control unit and fixed to the frame, a cover that covers the control unit, a first waterproof part that seals a first boundary that is the boundary between the frame and the cover and is waterproof, and a second waterproof part that seals a second boundary that is the boundary between the connector and the frame and is waterproof, each of the first boundary and the second boundary has a ring shape when viewed from the vertical direction.

[0008] In order to solve the above problem, the motor according to aspect 7 of the present disclosure comprises a motor body having a stator and a rotor that rotates around a rotation axis extending in the vertical direction, a frame that accommodates the motor body, a housing located above the motor body, a control board located above the housing and having a control unit that controls the motor body, a connector that is electrically connected to the control unit and fixed to the housing, a cover that covers the control unit, a first waterproof part that seals a first boundary that is the boundary between the frame and the cover and is waterproof, and a third waterproof part that seals a third boundary that is the boundary between the connector and the cover and is waterproof, each of the first boundary and the third boundary has a ring shape when viewed from the vertical direction.

[0009] According to the above aspects of the present disclosure, it is possible to provide a motor and a vehicle that are less likely to impair the layout flexibility of the product in which the motor is installed and that allow waterproof sections to be placed at the boundaries between the components that make up the motor at low cost and with high quality.

[0010] Fig. 1 is a cross-sectional view showing a motor according to embodiment 1. Fig. 2 is an enlarged view showing the periphery of a first boundary portion and a second boundary portion according to embodiment 1. Fig. 3 is a cross-sectional view showing a motor according to embodiment 2. Fig. 4 is an enlarged view showing the periphery of a first boundary portion and a third boundary portion according to embodiment 2. Fig. 5 is a schematic diagram showing a vehicle according to embodiment 3.

[0011] Embodiment 1. A motor according to embodiment 1 will now be described with reference to the drawings. As shown in Figure 1, a motor 100 according to this embodiment includes a motor main body 10, a frame 20, a housing 30, a control board 40, a connector 50, and a cover 60. The motor main body 10 has a rotation axis O that extends in one direction.

[0012] In the following description, the direction in which the rotation axis O of the motor main body 10 extends may be referred to as the axial direction Z or the vertical direction Z. In this embodiment, the motor main body 10 and the control board 40 are aligned in the vertical direction Z. In the vertical direction Z, the direction from the control board 40 toward the motor main body 10 is referred to as the downward or output side and may be represented as the -Z direction. In the vertical direction Z, the direction from the motor main body 10 toward the control board 40 is referred to as the upward or anti-output side and may be represented as the +Z direction. A view from the vertical direction Z may be referred to as a plan view. In the plan view, a direction intersecting the rotation axis O may be referred to as the radial direction, and a direction circumferential around the rotation axis O may be referred to as the circumferential direction. Furthermore, a direction intersecting (e.g., perpendicular to) the vertical direction Z may be referred to as the intersecting direction X.

[0013] In this embodiment, the motor body 10 includes a stator 11 , a rotor 12 , and a shaft 13 .

[0014] The stator 11 has a cylindrical shape extending in the vertical direction Z. The stator 11 has a stator core around which a coil 11b is wound via an insulator 11a. The stator 11 is fixed to the frame 20. There are no particular limitations on the method for fixing the stator 11 to the frame 20, and methods such as shrink fitting or press fitting may be used, for example.

[0015] The rotor 12 is disposed radially inside the stator 11. The rotor 12 has a cylindrical shape extending in the up-down direction Z. The rotor 12 includes, for example, a rotor core and a permanent magnet (details not shown).

[0016] The shaft 13 is fixed to the radially inner side of the rotor 12. The shaft 13 extends along the rotation axis O. The shaft 13 has a first end (output end) 13a and a second end (anti-output end) 13b. In the illustrated example, the first end 13a is the lower end of the shaft 13, and the second end 13b is the upper end of the shaft 13.

[0017] The first end 13a is held by a first bearing 15a provided in the frame 20 (bottom 21). When the motor 100 is used in an electric power steering device, the first end 13a engages with a gear or the like provided for assistance by the device, for example via a boss. The second end 13b is held by a second bearing 15b provided in the housing 30 (closure portion 31). The bearings 15a and 15b hold the shaft 13, causing the shaft 13 and rotor 12 to rotate around the rotation axis O. A sensor magnet 14 is attached to the second end 13b to transmit magnetism to a rotation sensor 43 (described later).

[0018] The frame 20 houses the motor main body 10. The frame 20 according to this embodiment has a bottom 21, a cylindrical portion 22, and an extending portion 23. The bottom 21 is located below the stator 11 and the rotor 12 and holds the first bearing 15a. The cylindrical portion 22 extends upward from the outer peripheral edge of the bottom 21 in a plan view. The bottom 21 and the cylindrical portion 22 together form a cylindrical shape with a bottom, forming a first internal space S1. The motor main body 10 is housed in the first internal space S1. The extending portion 23 extends from the upper end of the cylindrical portion 22 toward one side in the transverse direction X (the right side in the drawing). The bottom 21, the cylindrical portion 22, and the extending portion 23 may be integrally formed.

[0019] The housing 30 is located above the frame 20. The housing 30 according to this embodiment has a closing portion 31 and a retaining portion 32. The closing portion 31 is fixed to the upper end of the tubular portion 22 and closes the upper end of the first internal space S1. There are no particular limitations on the method for fixing the closing portion 31 to the tubular portion 22, and methods such as press fitting or caulking may be used, for example.

[0020] The holding portion 32 is located at the top of the housing 30. More specifically, in the illustrated example, the holding portion 32 extends from the upper end of the closing portion 31 toward one side in the intersecting direction X (to the right in the drawing). The direction in which the closing portion 31 extends from the holding portion 32 may be the same as the direction in which the extension portion 23 extends from the cylindrical portion 22. The holding portion 32 and the closing portion 31 hold the control board 40 with screws or the like (not shown).

[0021] The control board 40 is located above the housing 30. Specifically, the control board 40 may be placed on the housing 30. The control board 40 is held to the housing 30 by, for example, screws or the like (not shown).

[0022] The control board 40 has a control unit 41 that controls the motor main body 10. The control unit 41 may include, for example, control electronic components and power semiconductor components that form an inverter circuit. In addition to the control unit 41, the control board 40 may also be equipped with an electrolytic capacitor 42, a rotation sensor 43 for controlling the rotational position of the motor, and the like.

[0023] In the illustrated example, the electrolytic capacitor 42 is mounted on the underside of the control board 40. Furthermore, a recess 31a that opens upward is formed in the portion of the housing 30 (closure portion 31) that corresponds to the electrolytic capacitor 42. The electrolytic capacitor 42 is disposed within the recess 31a. The recess 31a functions as a relief portion to prevent interference between the housing 30 and the electrolytic capacitor 42. By providing such a relief portion and disposing the electrolytic capacitor 42 on the underside (output side) of the control board 40, the axial length of the MCU (Motor Control Unit) can be easily shortened.

[0024] A heat dissipation section 80 for dissipating heat generated by the control board 40 to the housing 30 may be provided between the control board 40 and the housing 30. The type of heat dissipation section 80 is not particularly limited as long as the control board 40 can dissipate heat to the housing 30, but the heat dissipation section 80 may be, for example, thermal grease. By providing such a heat dissipation section 80, the heat dissipation properties of the control board 40 can be improved.

[0025] Although detailed illustration is omitted, the connector 50 is electrically connected to the control board 40 (control unit 41), for example, via a terminal or the like. The connector 50 may, for example, receive power from outside the motor 100 (e.g., a vehicle) or receive a signal from a torque sensor or the like. As shown in FIG. 2 , the connector 50 according to this embodiment is fixed to the frame 20. More specifically, the connector 50 is fitted from below into a fitting hole 24 formed in the frame 20 and fixed to the frame 20 with a screw or the like (not shown). The connector 50 is located below (on the output side) as viewed from the control board 40. The connector 50 is exposed on the lower side (output side) of the frame 20. The connector 50 according to this embodiment has an insertion portion 51 and an outer peripheral protrusion 52. The insertion portion 51 is a portion of the connector 50 that is inserted into the fitting hole 24. The outer peripheral protrusion 52 is a protrusion that protrudes from the outer peripheral surface of the connector 50.

[0026] As shown in FIGS. 1 and 2 , the cover 60 covers the control unit 41. This prevents the control unit 41 from being exposed to the outside of the motor 100. The cover 60 according to this embodiment has a top portion 61, an outer periphery 62, and a flange portion 63. The top portion 61 is located above the control board 40 (control unit 41). The outer periphery 62 extends downward from the outer peripheral edge of the top portion 61 in a plan view. The outer periphery 62 has a cylindrical shape. The top portion 61 and the outer periphery 62 together form a cylindrical shape with a top and form a second internal space S2. The control board 40 (control unit 41) is disposed in the second internal space S2. The flange portion 63 extends radially outward from the lower end of the outer periphery 62. The top portion 61, the outer periphery 62, and the flange portion 63 may be integrally formed. The cover 60 is fixed to the frame 20 by, for example, a snap fit.

[0027] The lower end of the cover 60 (the lower end of the outer periphery 62 and the flange 63) is disposed in a fitting recess 25 formed in the frame 20. The fitting recess 25 is located on the outer periphery of the frame 20 in a plan view. As shown in FIG. 2 , the fitting recess 25 has a first surface 25a facing radially outward and a second surface 25b facing upward.

[0028] Of the components that make up motor 100, frame 20, connector 50, and cover 60 are exposed to the outside of motor 100. In this embodiment, to improve the airtightness of motor 100, waterproof sections are provided between (at the boundaries of) these three components (frame 20, connector 50, and cover 60).

[0029] For ease of explanation, the region (boundary) between the frame 20 and the cover 60 will be referred to as the first boundary B1, and the region (boundary) between the connector 50 and the frame 20 will be referred to as the second boundary B2 (see FIG. 2). Furthermore, the waterproof portion provided at the first boundary B1 will be referred to as the first waterproof portion 71, and the waterproof portion provided at the second boundary B2 will be referred to as the second waterproof portion 72. The first waterproof portion 71 seals the first boundary B1. The second waterproof portion 72 seals the second boundary B2.

[0030] Each of the first boundary B1 and the second boundary B2 has a continuous annular shape in a plan view. By simplifying the shapes of the boundaries B1 and B2 in this way, the waterproof portions 71 and 72 can be arranged at the boundaries B1 and B2 at low cost and with high quality. For example, by applying the silicone adhesive in a single stroke on a flat surface, the first waterproof portion 71 can be formed with high quality and low cost. Similarly, by applying the silicone adhesive in a single stroke on a flat surface, the second waterproof portion 72 can be formed with high quality and low cost.

[0031] Specifically, the first boundary B1 according to this embodiment includes a vertical region B1a and a horizontal region B1b. The vertical region B1a is located between the outer periphery 62 of the cover 60 and the first surface 25a of the fitting recess 25 in a direction intersecting (e.g., perpendicular to) the vertical direction Z. The horizontal region B1b is located between the flange 63 of the cover 60 and the second surface 25b of the fitting recess 25 in the vertical direction Z.

[0032] Similarly, the second boundary B2 according to this embodiment includes a vertical region B2a and a horizontal region B2b. The vertical region B2a is located between the inner peripheral surface of the fitting hole 24 and the insertion portion 51 of the connector 50 in a direction intersecting (e.g., perpendicular to) the vertical direction Z. The horizontal region B2b is located between the lower surface of the extension portion 23 and the outer peripheral protrusion 52 of the connector 50 in the vertical direction Z.

[0033] The first waterproof portion 71 has a continuous annular shape in a plan view. Specifically, the first waterproof portion 71 may have a vertical wall portion 71a extending in the up-down direction Z and a horizontal wall portion 71b intersecting (e.g., perpendicular to) the up-down direction Z. The vertical wall portion 71a is disposed in a vertical region B1a of the first boundary portion B1. The horizontal wall portion 71b is disposed in a horizontal region B1b of the first boundary portion B1. The first waterproof portion 71 may have only one of the vertical wall portion 71a and the horizontal wall portion 71b, or may have both the vertical wall portion 71a and the horizontal wall portion 71b.

[0034] Similarly, the second waterproof portion 72 has a continuous annular shape in a plan view. Specifically, the second waterproof portion 72 may have a vertical wall portion 72a extending in the up-down direction Z and a horizontal wall portion 72b intersecting (e.g., perpendicular to) the up-down direction Z. The vertical wall portion 72a is disposed in the vertical region B2a of the second boundary portion B2. The horizontal wall portion 72b is disposed in the horizontal region B2b of the second boundary portion B2. The second waterproof portion 72 may have only one of the vertical wall portion 72a and the horizontal wall portion 72b, or may have both the vertical wall portion 72a and the horizontal wall portion 72b.

[0035] As described above, the motor 100 of this embodiment comprises a motor body 10 having a stator 11 and a rotor 12 that rotates around a rotation axis O extending in the vertical direction Z, a frame 20 that accommodates the motor body 10, a housing 30 located above the motor body 10, a control board 40 located above the housing 30 and having a control unit 41 that controls the motor body 10, a connector 50 that is electrically connected to the control unit 41 and fixed to the frame 20, a cover 60 that covers the control unit 41, a first waterproof part 71 that seals a first boundary B1 that is the boundary between the frame 20 and the cover 60 and is waterproof, and a second waterproof part 72 that seals a second boundary B2 that is the boundary between the connector 50 and the frame 20 and is waterproof, and each of the first boundary B1 and the second boundary B2 has a ring shape when viewed in the vertical direction Z.

[0036] This configuration allows the boundaries B1 and B2 to have simple shapes, and allows the waterproofing sections 71 and 72 to be arranged at the boundaries B1 and B2 at low cost and with high quality. Furthermore, because the frame 20 is formed from a single member, the number of locations where the waterproofing sections must be arranged can be reduced. This makes it easier to arrange the waterproofing sections and improves waterproofing compared to when the frame 20 is formed by joining two or more members.

[0037] Furthermore, each of the first waterproof portion 71 and the second waterproof portion 72 has vertical wall portions 71 a, 72 a extending in the vertical direction Z and horizontal wall portions 71 b, 72 b extending in a direction intersecting the vertical direction Z. This configuration can further improve the waterproofness of the waterproof portions 71, 72.

[0038] Second Embodiment Next, a motor according to a second embodiment will be described, which has the same basic configuration as the motor according to the first embodiment. For this reason, the same components are given the same reference numerals and their description will be omitted, and only the differences will be described. In this embodiment, the configuration of the boundary and waterproof portions located between the three components (frame 20, connector 50, and cover 60) differs from that of the first embodiment.

[0039] As shown in Figures 3 and 4, the connector 50 according to this embodiment is located above (on the side opposite to the output side) the control board 40. An opening 64 is provided in the top 61 of the cover 60 to prevent interference with the connector 50. This exposes the connector 50 on the upper side (on the side opposite to the output side) of the cover 60. The connector 50 according to this embodiment has a protrusion 53 and a step 54 that protrudes from the base end of the protrusion 53 toward the outer periphery. The connector 50 according to this embodiment is fixed to the housing 30, not the frame 20. The housing 30 may have a fixing protrusion 33 for fixing the connector 50.

[0040] In the motor 100 according to this embodiment, instead of the second boundary B2 according to the first embodiment, there is a third boundary B3, which is the boundary between the connector 50 and the cover 60. A third waterproof portion 73 that seals the third boundary B3 and provides waterproofing is disposed at the third boundary B3. Note that, similar to the first embodiment, the motor 100 has a first boundary B1, and a first waterproof portion 71 is disposed at the first boundary B1.

[0041] The third boundary B3 has a continuous annular shape in a plan view. By making the third boundary B3 have such a simple shape, the third waterproof portion 73 can be arranged at the third boundary B3 at low cost and with high quality. For example, the third waterproof portion 73 can be formed at low cost and with high quality by applying the silicone adhesive in a single stroke on a flat surface.

[0042] Specifically, the third boundary B3 according to this embodiment includes a vertical region B3a and a horizontal region B3b. The vertical region B3a is located between the inner circumferential surface of the opening 64 and the protrusion 53 of the connector 50 in a direction intersecting (e.g., perpendicular to) the vertical direction Z. The horizontal region B3b is located between the lower surface of the apex 61 and the upper surface of the step 54 in the vertical direction Z.

[0043] The third waterproof portion 73 has a continuous annular shape in a plan view. Specifically, the third waterproof portion 73 may have a vertical wall portion 73a extending in the up-down direction Z and a horizontal wall portion 73b intersecting (e.g., perpendicular to) the up-down direction Z. The vertical wall portion 73a is disposed in the vertical region B3a of the third boundary portion B3. The horizontal wall portion 73b is disposed in the horizontal region B3b of the third boundary portion B3. The third waterproof portion 73 may have only one of the vertical wall portion 73a and the horizontal wall portion 73b, or may have both the vertical wall portion 73a and the horizontal wall portion 73b.

[0044] As described above, the motor 100 of this embodiment comprises a motor body 10 having a stator 11 and a rotor 12 that rotates around a rotation axis O extending in the vertical direction Z, a frame 20 that accommodates the motor body 10, a housing 30 located above the motor body 10, a control board 40 located above the housing 30 and having a control unit 41 that controls the motor body 10, a connector 50 that is electrically connected to the control unit 41 and fixed to the housing 30, a cover 60 that covers the control unit 41, a first waterproof part 71 that seals a first boundary B1 that is the boundary between the frame 20 and the cover 60 and is waterproof, and a third waterproof part 73 that seals a third boundary B3 that is the boundary between the connector 50 and the cover 60 and is waterproof, and each of the first boundary B1 and the third boundary B3 has a ring shape when viewed in the vertical direction Z.

[0045] This configuration allows the boundaries B1 and B3 to have a simple shape, and the waterproof portions 71 and 73 can be arranged at low cost and with high quality on the boundaries B1 and B3.

[0046] Furthermore, the first waterproof portion 71 and the third waterproof portion 73 each have vertical wall portions 71 a, 73 a extending in the vertical direction Z and horizontal wall portions 71 b, 73 b extending in a direction intersecting the vertical direction Z. This configuration can further improve the waterproofness of the waterproof portions 71, 73.

[0047] Furthermore, as shown in the first and second embodiments, the shapes of the boundaries B1 to B3 allow the connector 50 to be disposed on either the upper side (non-output side) or the lower side (output side) of the control board 40. This makes it possible to prevent the layout flexibility of a product (e.g., a vehicle) in which the motor 100 is mounted from being impaired.

[0048] Third Embodiment In this embodiment, a vehicle related to the motors described in the first and second embodiments will be described.

[0049] The motor 100 described in the first and second embodiments can be used, for example, in an electric power steering device mounted on a vehicle. FIG. 5 is a schematic diagram of a vehicle 300 according to this embodiment. The vehicle 300 has a pair of wheels 301. An electric power steering device 200 is mounted on the vehicle 300. The electric power steering device 200 according to this embodiment includes the motor 100, a steering wheel 201, a steering shaft 202, a rack and pinion gear 203, a tie rod 204, and a torque detector 205. As described in the above embodiments, the motor 100 includes a motor main body 10, a control unit 41, and a rotation sensor 43 (see also FIGS. 1 and 3).

[0050] A steering torque is applied to the steering wheel 201 by a driver (not shown) operating the steering wheel, etc. The steering shaft 202 has an input shaft 202a connected to the steering wheel 201 and an output shaft 202b connected to a rack and pinion gear 203. The input shaft 202a and the output shaft 202b are connected to each other by a torsion bar (not shown). The torsion bar is disposed inside the torque detector 205 and passes through the torque detector 205 in the axial direction.

[0051] Steering torque applied to steering wheel 201 is transmitted to a rack (not shown) in rack-pinion gear 203 via a torsion bar in torque detector 205, steering shaft 202, and a pinion (not shown) in rack-pinion gear 203. The rack and wheels 301 are connected via tie rod 204 and knuckle arm 206. Therefore, when steering torque caused by steering wheel operation is transmitted to the rack, tie rod 204 pushes knuckle arm 206 at one wheel 301, and tie rod 204 pulls knuckle arm 206 at the other wheel 301. This imparts a steering angle to wheels 301, causing them to turn.

[0052] The motor main body 10 of the motor 100 generates torque according to a voltage applied from the control unit 41. The torque (output torque) generated by the motor 100 is transmitted to a rack (or a tie rod 204) in a rack-and-pinion gear 203. In other words, the electric power steering device 200 according to this embodiment is a so-called rack-assist electric power steering device. As a specific example, the first end (output end) 13a of the shaft 13 described in the above embodiment may be engaged with the rack via a boss or the like. To transmit the output torque to the rack (or the tie rod 204), the motor 100 is disposed near the wheels 301. The output torque of the motor 100 functions as a steering assist force, reducing the steering torque that the driver must apply when steering.

[0053] Torque detector 205 detects the steering torque applied by the driver to steering wheel 201. More specifically, when steering torque is applied, a twist occurs in the torsion bar that is approximately proportional to the steering torque. Torque detector 205 detects the direction and angle of twist of the torsion bar. Torque detector 205 outputs the detected steering torque to control unit 41. Rotation sensor 43 detects the rotation speed of a rotating shaft (e.g., shaft 13). Rotation sensor 43 outputs the detected rotation speed to control unit 41. Control unit 41 calculates a voltage to be applied to motor 100 based on the steering torque output from torque detector 205 and the rotation speed output from rotation sensor 43. Control unit 41 controls motor 100 (applies a voltage to motor main body 10) based on the calculation result. In other words, control unit 41 performs feedback control based on the information detected by torque detector 205 and rotation sensor 43.

[0054] As described above, the vehicle 300 according to this embodiment includes a wheel 301 and an electric power steering device 200 having the motor 100 according to the embodiment, and the motor 100 is disposed near the wheel 301.

[0055] Generally, in a configuration in which the motor is located near the wheels, such as a rack-assist electric power steering device, water is likely to seep into the motor from the outside of the vehicle. By using the motor 100 having the waterproof structure of the above embodiment, waterproofing can be ensured even in such a configuration.

[0056] The technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure.

[0057] For example, in the first and second embodiments, the GND pattern exposed from the control board 40 may be grounded to the holding portion 32 of the housing 30. In this case, the control board 40 becomes electrically stable, and EMC (Electromagnetic Compatibility) noise of the MCU can be easily reduced.

[0058] Furthermore, in the first and second embodiments, the connector 50 may have a press-fit terminal that is connected (press-fit) to the control board 40. The press-fit terminal may also be connected to an end of the control board 40. This configuration makes it easier to manufacture the motor 100 compared to when the connector 50 and the control board 40 are electrically joined by soldering. This makes it easier to reduce the cost of the motor 100.

[0059] Furthermore, the motor 100 may be used in a so-called column-assist electric power steering device in which the output torque of the motor 100 is transmitted to the steering shaft 202. Alternatively, the motor 100 may be used in a so-called pinion-assist electric power steering device in which the output torque of the motor 100 is transmitted to a pinion in a rack and pinion gear 203. Alternatively, the motor 100 does not have to be a motor used in an electric power steering device.

[0060] In addition, within the scope of the present disclosure, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and variations may be combined as appropriate.

[0061] 300...Vehicle 200...Electric power steering device 100...Motor 10...Motor body 11...Stator 12...Rotor 20...Frame 30...Housing 31a...Recess (recess) 32...Retaining portion 40...Control board 41...Control unit 42...Electrolytic capacitor 50...Connector 60...Cover 71...First waterproof portion 71a...Vertical wall portion 71b...Horizontal wall portion 72...Second waterproof portion 72a...Vertical wall portion 72b...Horizontal wall portion 73...Third waterproof portion 73a...Vertical wall portion 73b...Horizontal wall portion B1...First boundary portion B2...Second boundary portion B3...Third boundary portion Z...Up / down direction

Claims

1. A motor body having a stator and a rotor that rotates about a rotation axis extending in the vertical direction, a frame that houses the motor body, a housing located above the motor body, a control board having a control unit for controlling the motor body and located above the housing, a connector electrically connected to the control unit and fixed to the frame, a cover that covers the control unit, a first waterproof part that seals a first boundary part which is a boundary part between the frame and the cover and has waterproofness, a second waterproof part that seals a second boundary part which is a boundary part between the connector and the frame and has waterproofness, and each of the first boundary part and the second boundary part has an annular shape when viewed from the vertical direction, a motor.

2. Each of the first waterproof part and the second waterproof part has a vertical wall part extending in the vertical direction and a horizontal wall part extending in a direction intersecting the vertical direction. The motor according to Claim 1.

3. The housing has a holding part that is located at the upper part of the housing and holds the control unit by screws. The motor according to Claim 1 or 2.

4. The connector has press-fit terminals connected to the control board. The motor according to Claim 1 or 2.

5. The press-fit terminals are connected to the end of the control board. The motor according to Claim 4.

6. The housing has a relief part for preventing interference with an electrolytic capacitor mounted on the control board. The motor according to Claim 1 or 2.

7. A motor body having a stator and a rotor that rotates about a rotation axis extending in the vertical direction, a frame that houses the motor body, a housing located above the motor body, a control board having a control unit for controlling the motor body and located above the housing, a connector electrically connected to the control unit and fixed to the housing, a cover that covers the control unit, a first waterproof part that seals a first boundary part which is a boundary part between the frame and the cover and has waterproofness, a third waterproof part that seals a third boundary part which is a boundary part between the connector and the cover and has waterproofness, and each of the first boundary part and the third boundary part has an annular shape when viewed from the vertical direction, a motor.

8. Each of the first waterproof portion and the third waterproof portion has a vertical wall portion extending in the vertical direction and a horizontal wall portion extending in a direction intersecting the vertical direction. The motor according to claim 7.

9. The housing has a holding portion that is located at the upper part of the housing and holds the control portion by a screw. The motor according to claim 7 or 8.

10. The connector has a press-fit terminal connected to the control board. The motor according to claim 7 or 8.

11. The press-fit terminal is connected to an end portion of the control board. The motor according to claim 10.

12. The housing has a relief portion for preventing interference with an electrolytic capacitor mounted on the control board. The motor according to claim 7 or 8.

13. A wheel; An electric power steering apparatus including the motor according to claim 1, 2, 7 or 8, wherein the motor is disposed in the vicinity of the wheel. A vehicle.