Control device, motor device, and oil pump device

Abstract

To provide a control device for which an assembly process is simplified, while maintaining a location accuracy of a housing, a control board, and a cover.SOLUTION: A control device has a control board on which a control circuit controlling an electric motor is mounted, a housing supporting a surface on one side in a thickness direction of the control board, and a cover attached to the housing so as to cover a surface on the other side in the thickness direction of the control board and the periphery of the control board. In the control board, multiple first positioning holes penetrating in the thickness direction are formed. In the housing, multiple second positioning holes corresponding to the respective first positioning holes are formed. The cover protrudes toward the housing, and has a plurality of positioning pins of a tapered shape in which a diameter of a circumscribed circle decreases gradually toward a tip. The positioning pins are inserted into the corresponding first positioning holes and second positioning holes, and position the control board, the housing, and the cover.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a control device, a motor device, and an oil pump device equipped with the same. [Background technology]

[0002] In recent years, efforts have been made to promote the Sustainable Development Goals (2030 Agenda for Sustainable Development, adopted at the United Nations Summit on September 25, 2015, hereafter referred to as "SDGs"). In line with this, technologies that aim to prevent waste generation, reduce waste, and significantly reduce waste generation by recycling and reusing products in order to ensure sustainable production and consumption patterns have become known.

[0003] Conventionally, there has been known a so-called "mechanically and electrically integrated" motor device in which an electric motor and a control board that controls the electric motor are housed and integrated in a housing. In such a motor device, the positioning of the control board relative to the housing is important to ensure that the terminals for supplying driving power from the control board to the electric motor and the non-contact sensor for detecting the amount of rotation of the electric motor function properly.

[0004] As an example, in Patent Document 1, a control board is fixed to a housing with bolts, and a cover that covers the control board is also fixed to the housing with bolts. As another example, in Patent Document 2, a control board is positioned relative to a housing with positioning pins, and a cover that covers the control board is fixed to the housing. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-136825 [Patent Document 2] JP 2023-055142 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the configurations of Patent Documents 1 and 2, the control board and the cover are each fixed separately to the housing, which poses a problem that the number of parts in the motor device increases and the number of assembly steps increases.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a control device in which the assembly process is simplified while maintaining the positional accuracy of the housing, control board, and cover. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention provides a control device comprising a control board on which a control circuit for controlling an electric motor is mounted, a housing supporting one surface of the control board in the thickness direction, and a cover attached to the housing so as to cover the other surface of the control board in the thickness direction and the periphery of the control board, wherein the control board has a plurality of first positioning holes formed therethrough in the thickness direction, the housing has a plurality of second positioning holes formed therein corresponding to each of the first positioning holes, the cover has a plurality of tapered positioning pins protruding toward the housing and having a circumscribing circle with a diameter gradually decreasing toward the tip, and the positioning pins are inserted into the corresponding first positioning holes and second positioning holes to position the control board, the housing, and the cover. Effect of the Invention

[0009] According to the present invention, it is possible to obtain a control device with a simplified assembly process while maintaining the positional accuracy of the housing, the control board, and the cover. Problems, configurations, and effects other than those described above will become apparent from the description of the following embodiments. [Brief description of the drawings]

[0010] [Figure 1]1 is an external perspective view of an oil pump device according to an embodiment of the present invention; [Diagram 2] FIG. [Diagram 3] FIG. 2 is a perspective view of the control unit with the cover removed. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 2 is a perspective view of the cover as seen from the back side. [Figure 7] 1A is a perspective view of a positioning pin, and FIG. 1B is a view from the tip side. [Figure 8] 4 is a diagram showing the relationship between a positioning pin, a first positioning hole, and a second positioning hole. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An oil pump device 1 according to an embodiment of the present invention will now be described with reference to the drawings. Fig. 1 is a perspective view of the appearance of the oil pump device 1 according to this embodiment.

[0012] The oil pump device 1 according to this embodiment supplies oil (for example, lubricating oil) to an engine clutch or a transmission clutch mounted on, for example, an automobile, although the use of the oil pump device 1 is not limited thereto.

[0013] As shown in Fig. 1, the oil pump device 1 is a so-called "electric oil pump" that includes a motor section 2, a control section 3, and a pump section 4. The motor section 2 and the control section 3 constitute a so-called "mechanically and electrically integrated" motor device 5, independent of the pump section 4. The motor device 5 is not limited to driving the pump section 4, and may also drive a cooling fan or a wiper. The control section 3 constitutes a control device that controls the electric motor 6, independent of the motor section 2 and the pump section 4.

[0014] The motor section 2 includes an electric motor 6 (see FIG. 4) that rotates (generates driving force) by driving power supplied from the control section 3. There is no particular limitation on the specific example of the electric motor 6, but for example, an inner rotor type brushless motor can be adopted. The configuration of the electric motor 6 is already well known, so a detailed description will be omitted. The control section 3 supplies power supplied from an external device (not shown) to the electric motor 6 as driving power. The specific configuration of the control section 3 will be described later with reference to FIG. 2 and subsequent figures. The driving force of the motor section 2 is transmitted to the pump section 4, which pumps oil. The configuration of the pump section 4 is already well known, so a detailed description will be omitted.

[0015] The motor section 2, the control section 3, and the pump section 4 are disposed adjacent to each other in the extending direction of a rotating shaft 7 (see FIG. 4) of the electric motor 6 described later. More specifically, the control section 3 is disposed adjacent to the motor section 2 disposed in the center on one side in the extending direction of the rotating shaft 7, and the pump section 4 is disposed adjacent to the other side in the extending direction of the rotating shaft 7.

[0016] The oil pump device 1 includes a housing 10 that houses a motor section 2, a control section 3, and a pump section 4. The housing 10 is made of a metal material such as aluminum die-cast. Note that the housing 10 is not limited to being an integrated type that houses the motor section 2, the control section 3, and the pump section 4 together, and may be configured with some parts being separate.

[0017] Fig. 2 is an exploded perspective view of the control unit 3. Fig. 3 is a perspective view of the control unit 3 with the cover 60 removed. As shown in Figs. 2 and 3, the control unit 3 mainly includes a housing 10, a control board 20, a connector unit 30, a relay unit 40, a heat sink 50, and a cover 60. Hereinafter, the extension direction of the rotating shaft 7 will be simply referred to as the "axial direction", and the direction perpendicular to the extension direction of the rotating shaft 7 (the radial direction of the rotating shaft 7) will be simply referred to as the "radial direction".

[0018] As shown in FIG. 2, the housing 10 defines a motor accommodating space 11 that accommodates the electric motor 6. The motor accommodating space 11 is a space having a generally cylindrical outer shape. The housing 10 also has a support surface 12 that supports components (20-60) of the control unit 3. The support surface 12 is a surface that expands in the radial direction at a position axially offset from the motor accommodating space 11. The support surface 12 has a generally rectangular outer shape when viewed from the axial direction.

[0019] The support surface 12 is provided with a plurality of (four in this embodiment) support protrusions 13a, 13b, 13c, and 13d, a plurality of (four in this embodiment) screw seats 14a, 14b, 14c, and 14d, and a heat sink support portion 15.

[0020] The support protrusions 13a to 13d protrude in the axial direction from the support surface 12 at different positions on the support surface 12 (typically, positions surrounding the motor accommodating space 11). The support protrusions 13a to 13d support the control board 20 at their tips. Second positioning holes 16a, 16b, 16c, and 16d for receiving positioning pins 64a to 64d (described later) are formed in the support protrusions 13a to 13d. The second positioning holes 16a to 16d extend from the tips of the support protrusions 13a to 13d toward the base ends.

[0021] The screw seats 14a to 14d protrude in the axial direction from the support surface 12 at different positions on the support surface 12 (typically, positions surrounding the motor accommodating space 11). The screw seats 14a to 14d have screw holes 17a, 17b, 17c, and 17d formed therein that communicate with the screw holes 65a to 65d of the cover 60 when the cover 60 is attached to the housing 10. The screws 18a to 18d are screwed into the communicating screw holes 17a to 17d, 65a to 65d, thereby fixing the cover 60 to the housing 10.

[0022] The heat sink support part 15 supports the heat transfer plate 52 of the heat sink 50. The heat sink support part 15 is provided at a position radially offset from the motor accommodating space 11. The heat sink support part 15 is provided at a position adjacent to one of the four sides constituting the outer edge of the support surface 12, linearly extending in parallel to the side.

[0023] FIG. 4 is a cross-sectional view of the control board 20 and its periphery. As shown in FIGS. 2 and 4, the control board 20 has a board 21. The board 21 is a flat member having a generally rectangular outer shape. The board 21 has a first surface 21a and a second surface 21b. The first surface 21a is a surface on one side in the thickness direction of the board 21 (the side facing the motor accommodating space 11). The second surface 21b is a surface on the other side in the thickness direction of the board 21 (the side opposite to the first surface 21a). The board 21 is disposed so as to overlap the motor accommodating space 11 when viewed from the axial direction. The outer edge of the board 21 is located outside the motor accommodating space 11 when viewed from the axial direction.

[0024] The substrate 21 is formed with first positioning holes 22a, 22b, 22c, and 22d penetrating in the thickness direction. The first positioning holes 22a-22d are formed at positions corresponding to the support protrusions 13a-13d on the outer edge of the substrate 21. When the substrate 21 is supported by the tips of the support protrusions 13a-13d, the corresponding first positioning holes 22a-22d and second positioning holes 16a-16d communicate with each other. When the positioning pins 64a-64d are inserted into the corresponding first positioning holes 22a-22d and second positioning holes 16a-16d, the housing 10, the control substrate 20, and the cover 60 are positioned.

[0025] A plurality of circuit elements 23a, 23b, and 23c constituting a control circuit 23 that controls the electric motor 6 are mounted on one or both of the first surface 21a and the second surface 21b of the substrate 21. In this embodiment, the circuit elements 23a and 23b are mounted on the second surface 21b, and the circuit element 23c is mounted on the first surface 21a. The circuit element 23c is, for example, a sensor that detects the amount of rotation of the electric motor 6 by reading a change in the magnetic field (rotation of the rotating body) of the magnet 8 that rotates together with the rotating shaft 7. That is, the circuit element 23c and the magnet 8 are disposed at a predetermined interval in the axial and radial directions.

[0026] The connector unit 30 connects an external device and the control circuit 23. The connector unit 30 includes a pair of power lines for supplying driving power output from the external device to the control circuit 23, and a pair of signal lines for transmitting and receiving control signals between the external device and the control circuit 23. The connector unit 30 is accommodated in a connector holder 63 of the cover 60. The connector unit 30 is, for example, inserted when the cover 60 is injection molded, and is molded as one piece.

[0027] 5 is an exploded perspective view of the relay unit 40. The relay unit 40 connects the control circuit 23 and the electric motor 6 (more specifically, the coil). The relay unit 40 supplies three-phase driving power output from the control circuit 23 to the coil. This causes the electric motor 6 to rotate. The relay unit 40 is composed of, for example, circuit side terminals 41U, 41V, 41W, a terminal holder 42, motor side terminals 43U, 43V, 43W, and joints 44U, 44V, 44W.

[0028] The circuit side terminals 41U, 41V, 41W are connected to the control circuit 23. The terminal holder 42 fixes the circuit side terminals 41U, 41V, 41W to the substrate 21. The motor side terminals 43U, 43V, 43W are connected to the coils of the electric motor 6. The joints 44U, 44V, 44W connect the tips of the circuit side terminals 41U, 41V, 41W and the motor side terminals 43U, 43V, 43W to each other.

[0029] More specifically, the ends of the circuit side terminals 41U, 41V, 41W and the motor side terminals 43U, 43V, 43W are extended in the axial direction (more specifically, in the direction from the housing 10 toward the cover 60). The joints 44U, 44V, 44W also include a pair of cylindrical portions 45U, 45V, 45W, 46U, 46V, 46W that receive the ends of the circuit side terminals 41U, 41V, 41W and the motor side terminals 43U, 43V, 43W. Both ends of the cylindrical portions 45U, 45V, 45W, 46U, 46V, 46W in the axial direction are open. The ends of the circuit side terminals 41U, 41V, 41W are inserted into and removed from the cylindrical portions 45U, 45V, 45W in the axial direction. Similarly, the tips of the motor side terminals 43U, 43V, 43W are axially inserted into and removed from the cylindrical portions 46U, 46V, 46W.

[0030] 2, the heat sink 50 is a heat dissipation member that dissipates heat generated by the circuit element 23b to the housing 10. The heat sink 50 is made of a metal material (e.g., copper) with high thermal conductivity. For example, the heat sink 50 is formed by pressing a flat plate, the heat sink 50 including a heat receiving plate 51 and a heat transfer plate 52 that are bent so as to intersect (orthogonally) with each other. That is, the heat sink 50 has a generally L-shaped outer shape.

[0031] Fig. 6 is a perspective view of the cover 60 as viewed from the back side. The cover 60 is integrally molded, for example, by injection molding a resin material. That is, the cover 60 is formed of a material that has a lower thermal conductivity than the housing 10 and is lighter than the housing 10. As shown in Figs. 2 and 6, the cover 60 mainly includes a top wall 61, a side wall 62, a connector holder 63, and a plurality of positioning pins 64a, 64b, 64c, and 64d.

[0032] The top wall 61 is a portion that covers the second surface 21b of the control board 20 (substrate 21). When the cover 60 is attached to the housing 10, the top wall 61 faces the second surface 21b at a predetermined distance from the control board 20 in the axial direction. In addition, the heat receiving plate 51 of the heat sink 50 is attached to the surface (rear surface) of the top wall 61 that faces the second surface 21b. The heat receiving plate 51 may be attached to the top wall 61 by, for example, thermal caulking, or may be inserted when the cover 60 is injection molded. Furthermore, screw holes 65a, 65b, 65c, and 65d that penetrate in the thickness direction are formed at the four corners of the top wall 61.

[0033] The side wall 62 is a frame-shaped portion that covers the periphery of the control board 20. The side wall 62 protrudes from the outer edge of the top wall 61 toward the housing 10 (i.e., in the axial direction). When the housing 10 is attached to the cover 60, the tip of the side wall 62 abuts against the support surface 12 of the housing 10. As a result, a board accommodating space 24 that accommodates the control board 20 is formed between the housing 10 and the cover 60 (more specifically, the support surface 12, the top wall 61, and the side wall 62). The connector holder 63 is provided on the outer side of the side wall 62 and holds the connector unit 30.

[0034] The positioning pins 64a to 64d protrude axially from the back surface of the top wall 61 toward the housing 10 inside the side wall 62. The positioning pins 64a to 64d are axially inserted into the corresponding first positioning holes 22a to 22d and second positioning holes 16a to 16d to position the housing 10, the control board 20, and the cover 60. Since the positioning pins 64a to 64d have a common configuration, only the positioning pin 64a will be described below.

[0035] Fig. 7 is a perspective view (A) of the positioning pin 64a and a view (B) from the tip side. The positioning pin 64a has an overall tapered (frustum-shaped) outer shape with a diameter gradually decreasing toward the tip. More specifically, as shown in Fig. 7, the positioning pin 64a includes a pin body 66 and a plurality of ridges 67a, 67b, and 67c. The number of ridges 67a to 67c may be three or more.

[0036] The pin body 66 protrudes in the axial direction from the back surface of the top wall 61 toward the housing 10. The pin body 66 has a truncated cone shape. That is, the pin body 66 has a tapered shape in which the diameter gradually decreases toward the tip. Furthermore, the cross section of the pin body 66 (a cross section perpendicular to the protruding direction) is a perfect circle.

[0037] The ridges 67a to 67c are provided at positions spaced apart in the circumferential direction on the outer circumferential surface of the pin body 66. More specifically, the ridges 67a to 67c are provided at equal intervals (120° intervals) in the circumferential direction on the outer circumferential surface of the pin body 66. The ridges 67a to 67c protrude in the radial direction of the pin body 66. The ridges 67a to 67c extend in the extension direction of the pin body 66. The amount of protrusion of the ridges 67a to 67c is the same at all positions in the extension direction.

[0038] As a result, as shown in Fig. 7(B), the diameters of circumscribing circles C1, C2 (imaginary circles connecting the protruding tips of the ribs 67a to 67c) of the positioning pin 64a become gradually smaller toward the tips. However, the configurations of the pin body 66 and the ribs 67a to 67c are not limited to the above example. As another example, the pin body 66 may be a columnar shape with the same diameter in the extension direction. Also, the ribs 67a to 67c may gradually become smaller in protruding amount toward the tips.

[0039] Fig. 8 is a diagram showing the relationship between the positioning pin 64a, the first positioning hole 22a, and the second positioning hole 16a. Note that in Fig. 8, the distinction between the pin body 66 and the protrusions 67a to 67c is omitted and only the contour line of the circumscribing circle of the positioning pin 64a is shown.

[0040] The diameter D1 of the first positioning hole 22a is the same at all positions in the thickness direction of the substrate 21. The second positioning hole 16a has a tapered shape in which the diameter gradually decreases from the tip to the base end of the support protrusion 13a. That is, the second positioning hole 16a has the largest diameter D2 at the open end (the tip side of the support protrusion 13a) and the smallest diameter d2 at the inner end (the base end side of the support protrusion 13a). The positioning pin 64a has the smallest diameter d3 at the tip and the largest diameter D3 at the base end. The circumscribing circle of the positioning pin 64a and the cross sections of the first positioning hole 22a and the second positioning hole 16a are all perfect circles.

[0041] The diameter d3 of the tip of the positioning pin 64a is smaller than the diameter D1 of the first positioning hole 22a, smaller than the diameter D2 of the opening end of the second positioning hole 16a, and larger than the diameter d2 of the base end of the second positioning hole 16a. The diameter D3 of the base end of the positioning pin 64a is larger than the diameter D1 of the first positioning hole 22a. The length L3 (axial dimension) of the positioning pin 64a is longer than the depth L2 (axial dimension) of the second positioning hole 16a. Furthermore, the taper ratio of the positioning pin 64a (=(D3-d3) / L3) is smaller than the taper ratio of the second positioning hole 16a (=(D2-d2) / L2).

[0042] Next, a procedure for assembling the housing 10, the control board 20, and the cover 60 will be described. At the start of assembly, the control circuit 23 (particularly the circuit element 23c), the circuit side terminals 41U, 41V, 41W, and the terminal holder 42 are attached to the board 21, and the electric motor 6 to which the magnet 8 and the motor side terminals 43U, 43V, 43W are attached is housed in the motor housing space 11. In addition, as shown in Fig. 5, the tips of the circuit side terminals 41U, 41V, 41W are inserted into the cylindrical portions 45U, 45V, 45W.

[0043] First, the positioning pin 64a is inserted into the first positioning hole 22a from the second surface 21b side of the substrate 21. Then, as shown in Fig. 8(B), when the outer peripheral surface of the positioning pin 64a is inserted to a position where it contacts the inner peripheral surface of the first positioning hole 22a over the entire circumference (so-called low pressure fitting), the control substrate 20 and the cover 60 are positioned. At this time, the tip of the positioning pin 64a protrudes toward the first surface 21a side of the substrate 21.

[0044] Next, the positioning pin 64a protruding toward the first surface 21a of the substrate 21 is inserted into the second positioning hole 16a. Then, as shown in Fig. 8(C), when the first surface 21a of the substrate 21 abuts against the tip of the support protrusion 13a and the tip of the positioning pin 64a is inserted to a position where it contacts the inner circumferential surface of the second positioning hole 16a over the entire circumference (so-called low pressure fitting), the housing 10, the control substrate 20, and the cover 60 are positioned.

[0045] In addition, during the process of inserting the positioning pin 64a into the second positioning hole 16a, the heat transfer plate 52 is inserted into the heat sink support portion 15, the tips of the motor side terminals 43U, 43V, 43W are inserted into the cylindrical portions 46U, 46V, 46W, and the magnet 8 and circuit element 23c are positioned at a predetermined distance.

[0046] 8(C), the screw holes 17a to 17d and 65a to 65d communicate with each other. Then, the screws 18a to 18d are screwed into the screw holes 17a to 17d and 65a to 65d, and the cover 60 is fixed to the housing 10 with the housing 10, the control board 20, the heat sink 50, and the cover 60 positioned.

[0047] According to the above embodiment, for example, the following advantageous effects are achieved.

[0048] According to the above embodiment, the housing 10, the control board 20, and the cover 60 are positioned simply by inserting the positioning pins 64a-64d into the first positioning holes 22a-22d and the second positioning holes 16a-16d. As a result, the assembly process can be simplified while maintaining the positional accuracy of the housing 10, the control board 20, and the cover 60, compared to individually positioning the control board 20 and the cover 60 relative to the housing 10.

[0049] In particular, since the number of screws can be reduced compared to Patent Document 1, the work of tightening the screws in the assembly process can be reduced. Furthermore, since the shavings generated when the screws are screwed can be reduced, contamination can be prevented, which contributes to preventing waste generation by reducing defective products. Furthermore, by adopting a resin cover 60, the oil pump device 1 can be made lighter than a metal cover, which contributes to carbon neutrality.

[0050] Furthermore, according to the above embodiment, by forming the positioning pins 64a-64d into a tapered shape, even if precise position adjustment is not performed at the time of starting to insert the positioning pins 64a-64d into the positioning holes 22a-22d and 16a-16d, the housing 10, the control board 20, and the cover 60 are ultimately positioned with high precision (at the time when the positioning pins 64a-64d are lightly press-fitted into the positioning holes 22a-22d and 16a-16d). As a result, the assembly process is further simplified.

[0051] Furthermore, according to the above embodiment, the positioning pins 64a to 64d are formed by the pin body 66 and the ridges 67a to 67c, so that the contact surface pressure of the positioning pins 64a to 64d with the positioning holes 22a to 22d, 16a to 16d can be reduced.

[0052] Furthermore, according to the above embodiment, the diameter D2 of the opening end can be increased by making the second positioning holes 16a-16d tapered, so that even if precise position adjustment is not performed at the time of starting to insert the positioning pins 64a-64d, the housing 10, the control board 20, and the cover 60 can be positioned with high precision in the end. As a result, the assembly process is further simplified.

[0053] Furthermore, according to the embodiment described above, the taper ratio of the positioning pins 64a-64d is made smaller than the taper ratio of the second positioning holes 16a-16d, so that the positioning pins 64a-64d are lightly press-fitted into the second positioning holes 16a-16d. This further improves the positional accuracy of the housing 10, the control board 20, and the cover 60.

[0054] Furthermore, according to the above embodiment, the positioning pins 64a-64d and the second positioning holes 16a-16d are tapered, which makes it easier to remove the mold during injection molding. In this respect, it is desirable that the outer circumferential surfaces of the support protrusions 13a-13d and the screw seats 14a-14d also have a tapered shape with a diameter gradually increasing from the tip to the base end.

[0055] The embodiments of the present invention have been described above. Note that the present invention is not limited to the above-described embodiments, and various modified examples are included. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those having all of the configurations described. In addition, it is possible to replace a part of the configuration of this embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of this embodiment. Furthermore, it is possible to add, delete, or replace a part of the configuration of this embodiment with another configuration. [Explanation of symbols]

[0056] 1: Oil pump device 2: Motor section 3: Control section 4: Pump section 5: Motor device 6: Electric motor 7: Rotation axis 8: Magnet 10: Housing 11: Motor housing space 12: Support surface 13: Support protrusion 14: Screw seat 15: Heat sink support 16: Second positioning hole 17,65: Screw hole 18: Screw 20: Control board 21: Substrate 21a: 1st page 21b: 2nd side 22: First positioning hole 23: Control circuit 24: Substrate storage space 30: Connector unit 40: Relay unit 41: Circuit side terminal 42: Terminal holder 43: Motor side terminal 44: Joint 45, 46: Cylindrical section 50: Heat sink 51: Heat receiving plate 52: Heat transfer plate 60: Cover 61: Ceiling wall 62: Side wall 63: Connector holder 64: Positioning pin 66: Pin body 67: protrusion

Claims

1. A control board on which a control circuit for controlling the electric motor is mounted; a housing that supports one surface of the control board in a thickness direction; a cover attached to the housing so as to cover the other surface of the control board in a thickness direction and a periphery of the control board, The control board is formed with a plurality of first positioning holes penetrating in a thickness direction, The housing is formed with a plurality of second positioning holes corresponding to the plurality of first positioning holes, The cover includes a plurality of positioning pins that protrude toward the housing and have a tapered shape in which the diameter of a circumscribing circle gradually decreases toward a tip thereof, A control device, characterized in that the positioning pins are inserted into the corresponding first positioning holes and second positioning holes to position the control board, the housing, and the cover.

2. 2. The control device according to claim 1, The positioning pin is A tapered pin body with a diameter gradually decreasing toward the tip; A control device comprising: protrusions protruding radially from the pin body and extending in the extension direction of the pin body at at least three circumferentially spaced locations on the outer peripheral surface of the pin body.

3. 2. The control device according to claim 1, the housing includes a plurality of support protrusions that support the control board at their tips; The control device, wherein the second positioning hole extends from the tip end of the support projection toward the base end.

4. 4. The control device according to claim 3, The second positioning hole has a tapered shape in which the diameter gradually decreases toward the base end of the support projection, A control device characterized in that the taper ratio of the positioning pin is smaller than that of the second positioning hole.

5. an electric motor supported by the housing; A motor device comprising: a control device for controlling the electric motor according to claim 1 .

6. 6. The motor device according to claim 5, a terminal extending from the electric motor toward the control board; a joint that receives the terminal during the process of inserting the positioning pin into the corresponding first positioning hole and second positioning hole, and supplies driving power generated by the control board to the electric motor through the terminal.

7. 6. The motor device according to claim 5, a rotor that rotates together with a rotary shaft of the electric motor; a sensor fixed to the control board for reading rotation of the rotating body to detect an amount of rotation of the electric motor.

8. The motor device according to claim 5 ; and a pump unit that pumps oil by the driving force of the electric motor.

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