Control device, motor device, and oil pump device

Abstract

The invention provides a control device, a motor device, and an oil pump device, wherein the assembly process is simplified while the positional accuracy of a housing, a control substrate, and a cover is maintained. The control device includes: a control board on which a control circuit for controlling the electric motor is mounted; a housing that supports one surface of the control substrate in the thickness direction; and a cover attached to the housing so as to cover the other surface of the control substrate in the thickness direction and the periphery of the control substrate. A plurality of first positioning holes penetrating in the thickness direction are formed in the control substrate. A plurality of second positioning holes respectively corresponding to the plurality of first positioning holes are formed in the shell. The cover includes a plurality of tapered positioning pins protruding toward the housing and having circumscribed circles with diameters gradually decreasing toward the front end. And the positioning pins are inserted into the corresponding first positioning holes and second positioning holes to position the control substrate, the shell and the cover.

Description

Technical Field

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

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

[0003] Conventionally, there is known a so-called "mechatronic" motor device in which an electric motor and a control substrate for controlling the electric motor are accommodated in a housing and integrated. In such a motor device, in order to allow terminals for supplying driving power from the control substrate to the electric motor, a non-contact sensor for detecting the rotation amount of the electric motor, and the like to function properly, the positioning of the control substrate relative to the housing becomes important.

[0004] As an example, in Patent Document 1, a control substrate is fixed to a housing by bolts, and a cover covering the control substrate is fixed to the housing by bolts. As another example, in Patent Document 2, a control substrate is positioned to the housing by positioning pins, and a cover covering the control substrate is fixed to the housing.

[0005] [Prior art literature]

[0006] [Patent Document]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2021-136825

[0008] [Patent Document 2] Japanese Patent Application Publication No. 2023-055142 Summary of the invention

[0009] [Problems to be solved by the invention]

[0010] However, in the configurations of Patent Documents 1 and 2, the control substrate and the cover are fixed to the housing separately, which increases the number of parts of the motor device and the number of assembly steps.

[0011] Therefore, an object of the present invention is to provide a control device that simplifies the assembly process while maintaining the positional accuracy of a housing, a control substrate, and a cover.

[0012] [Technical means to solve the problem]

[0013] In order to achieve the above-mentioned purpose, the present invention is a control device, which includes: a control substrate, on which a control circuit for controlling an electric motor is installed; a shell, which supports a surface on one side of the thickness direction of the control substrate; and a cover, which is installed on the shell in a manner of covering a surface on the other side of the thickness direction of the control substrate and the periphery of the control substrate. The control device is characterized in that a plurality of first positioning holes penetrating along the thickness direction are formed in the control substrate, and a plurality of second positioning holes corresponding to the plurality of first positioning holes are formed in the shell, and the cover includes a plurality of positioning pins in a conical shape protruding toward the shell and with a diameter of a circumscribed circle gradually decreasing toward the front end. The positioning pins are inserted into the corresponding first positioning holes and the second positioning holes to position the control substrate, the shell and the cover.

[0014] [Effects of the Invention]

[0015] According to the present invention, a control device can be obtained that simplifies the assembly process while maintaining the positional accuracy of the housing, the control substrate, and the cover. Other problems, structures, and effects will become clear from the following description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an external perspective view of the oil pump device according to the present embodiment.

[0017] Figure 2 This is an exploded perspective view of the control unit.

[0018] Figure 3 This is a perspective view of the control unit with the cover removed.

[0019] Figure 4 This is a cross-sectional view of the control substrate and its surroundings.

[0020] Figure 5 This is an exploded perspective view of the relay unit.

[0021] Figure 6 This is a perspective view of the cover as viewed from the back side.

[0022] Fig. 7A This is a three-dimensional diagram of the positioning pin. Figure 7B This is a diagram viewed from the front end side.

[0023] FIG. 8A to FIG. 8C It is a diagram showing the relationship among the positioning pin, the first positioning hole, and the second positioning hole.

[0024] [Explanation of Symbols]

[0025] 1: Oil pump device

[0026] 2: Motor

[0027] 3: Control Department

[0028] 4: Pump

[0029] 5: Motor device

[0030] 6: Electric Motor

[0031] 7: Rotation axis

[0032] 8: Magnet

[0033] 10: Shell

[0034] 11: Motor storage space

[0035] 12: Support surface

[0036] 13: Support protrusion

[0037] 14: Screw seat

[0038] 15: Radiator support

[0039] 16: Second positioning hole

[0040] 17, 65: Screw holes

[0041] 18: Screw

[0042] 20: Control board

[0043] 21: Substrate

[0044] 21a: Side 1

[0045] 21b: Side 2

[0046] 22: First positioning hole

[0047] 23: Control circuit

[0048] 24: Substrate storage space

[0049] 30: Connector unit

[0050] 40: Relay unit

[0051] 41: Circuit side terminal

[0052] 42: Terminal retainer

[0053] 43: Motor side terminal

[0054] 44: Connector

[0055] 45, 46: Cylindrical part

[0056] 50: Radiator

[0057] 51: Heating plate

[0058] 52: Heat transfer plate

[0059] 60: Hood

[0060] 61: Top wall

[0061] 62: Sidewall

[0062] 63: Connector retainer

[0063] 64: Positioning pin

[0064] 66: Pin body

[0065] 67: protrusion DETAILED DESCRIPTION

[0066] Hereinafter, an oil pump device 1 according to an embodiment of the present invention will be described with reference to the drawings. Figure 1 It is an external perspective view of the oil pump device 1 according to the present embodiment.

[0067] The oil pump device 1 of the present embodiment supplies oil (for example, lubricating oil) to, for example, an engine clutch or a transmission clutch mounted in an automobile. However, the use of the oil pump device 1 is not limited thereto.

[0068] like Figure 1 As shown, the oil pump device 1 is a so-called "electric oil pump" including a motor unit 2, a control unit 3 and a pump unit 4. In addition, the motor unit 2 and the control unit 3 independently form a so-called "mechanical integrated" motor device 5 with the pump unit 4. In addition, the motor device 5 is not limited to driving the pump unit 4, but can also drive a cooling fan or a wiper. Furthermore, the control unit 3 independently forms a control device for controlling the electric motor 6 with the motor unit 2 and the pump unit 4.

[0069] The motor unit 2 includes an electric motor 6 (see FIG. 1 ) which is rotated (generates driving force) by driving power supplied from the control unit 3. Figure 4 ). The specific example of the electric motor 6 is not particularly limited, but for example, an inner rotor type brushless motor may be used. The structure of the electric motor 6 is well known, so a detailed description is omitted. The control unit 3 supplies the electric power supplied from an external device (not shown) as driving power to the electric motor 6. For the specific structure of the control unit 3, refer to Figure 2 The pump unit 4 receives the driving force of the motor unit 2 and pumps the oil under pressure. The structure of the pump unit 4 is well known, so the detailed description is omitted.

[0070] The motor unit 2, the control unit 3, and the pump unit 4 are connected to a rotating shaft 7 (see Figure 4More specifically, for the motor unit 2 arranged in the center, the control unit 3 is arranged adjacent to one side of the extending direction of the rotating shaft 7, and the pump unit 4 is arranged adjacent to the other side of the extending direction of the rotating shaft 7.

[0071] The oil pump device 1 includes a housing 10 that accommodates a motor unit 2, a control unit 3, and a pump unit 4. The housing 10 is made of a metal material such as die-cast aluminum. In addition, the housing 10 is not limited to an integrated type that collectively accommodates the motor unit 2, the control unit 3, and the pump unit 4, but may also be partially divided.

[0072] Figure 2 It is an exploded perspective view of the control unit 3 . Figure 3 FIG. 2 is a perspective view of the control unit 3 with the cover 60 removed. Figure 2 and Figure 3 As shown, the control unit 3 mainly includes a housing 10, a control substrate 20, a connector unit 30, a relay unit 40, a heat sink 50, and a cover 60. Hereinafter, the extending direction of the rotating shaft 7 is simply expressed as "axial direction", and the direction orthogonal to the extending direction of the rotating shaft 7 (radial direction of the rotating shaft 7) is simply expressed as "radial direction".

[0073] like Figure 2 As shown, a motor housing space 11 for housing the electric motor 6 is formed in the housing 10. The motor housing space 11 is a space with a substantially cylindrical outer shape. In addition, the housing 10 has a support surface 12 for supporting the components (20 to 60) of the control unit 3. The support surface 12 is a surface extending radially at a position offset axially from the motor housing space 11. The support surface 12 has a substantially quadrilateral outer shape when viewed from the axial direction.

[0074] The support surface 12 is provided with a plurality of (four in this embodiment) support protrusions 13 a , 13 b , 13 c , and 13 d , a plurality of (four in this embodiment) screw seats 14 a , 14 b , 14 c , and 14 d , and a heat sink support portion 15 .

[0075] The support protrusions 13a to 13d protrude axially from the support surface 12 at different positions (typically, positions surrounding the motor housing space 11) of the support surface 12. The support protrusions 13a to 13d support the control substrate 20 with their front ends. In addition, the support protrusions 13a to 13d are formed with second positioning holes 16a, 16b, 16c, and 16d for receiving positioning pins 64a to 64d described later. The second positioning holes 16a to 16d extend from the front ends of the support protrusions 13a to 13d toward the base ends.

[0076] The screw seats 14a to 14d protrude axially from the support surface 12 at different positions (typically, positions surrounding the motor housing space 11) of the support surface 12. The screw seats 14a to 14d are formed with screw holes 17a, 17b, 17c, and 17d that communicate with the screw holes 65a to 65d of the cover 60 when the cover 60 is mounted on the housing 10. The cover 60 is fixed to the housing 10 by screwing the screws 18a to 18d into the communicating screw holes 17a to 17d and the screw holes 65a to 65d.

[0077] The radiator support 15 supports the heat transfer plate 52 of the radiator 50. The radiator support 15 is provided at a position radially offset from the motor housing space 11. The radiator support 15 is provided linearly parallel to one of the four sides constituting the outer edge of the support surface 12 at a position adjacent to the side.

[0078] Figure 4 2 is a cross-sectional view of the periphery of the control substrate 20. Figure 2 and Figure 4 As shown, the control substrate 20 has a substrate 21. The substrate 21 is a flat plate-shaped member having a roughly quadrilateral shape. In addition, the substrate 21 has a first surface 21a and a second surface 21b. The first surface 21a is a surface on one side (the side facing the motor housing space 11) in the thickness direction of the substrate 21. The second surface 21b is a surface on the other side (the side opposite to the first surface 21a) in the thickness direction of the substrate 21. The substrate 21 is configured to overlap with the motor housing space 11 when viewed from the axial direction. In addition, the outer edge of the substrate 21 is located outside the motor housing space 11 when viewed from the axial direction.

[0079] The substrate 21 is formed with a first positioning hole 22a, a first positioning hole 22b, a first positioning hole 22c, and a first positioning hole 22d that penetrate in the thickness direction. The first positioning holes 22a to 22d are formed at the outer edge of the substrate 21 at positions corresponding to the support protrusions 13a to 13d. Furthermore, when the substrate 21 is supported by the front ends of the support protrusions 13a to 13d, the corresponding first positioning holes 22a to 22d and the second positioning holes 16a to 16d are connected. Furthermore, when the positioning pins 64a to 64d are inserted into the corresponding first positioning holes 22a to 22d and the second positioning holes 16a to 16d, the housing 10, the control substrate 20, and the cover 60 are positioned.

[0080] A plurality of circuit elements 23a, 23b, and 23c constituting a control circuit 23 for controlling 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 the present 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 the change in the magnetic field of the magnet 8 that rotates with the rotating shaft 7 (rotation of the rotating body). That is, the circuit element 23c is arranged at a predetermined interval from the magnet 8 in the axial and radial directions.

[0081] The connector unit 30 connects the external device to the control circuit 23. The connector unit 30 includes a pair of power lines for supplying the 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 the connector holder 63 of the cover 60. The connector unit 30 is embedded and integrally formed when the cover 60 is injection molded, for example.

[0082] Figure 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 the three-phase drive power output from the control circuit 23 to the coil. As a result, the electric motor 6 rotates. The relay unit 40 includes, for example, a circuit side terminal 41U, a circuit side terminal 41V, a circuit side terminal 41W, a terminal holder 42, a motor side terminal 43U, a motor side terminal 43V, a motor side terminal 43W, a connector 44U, a connector 44V, and a connector 44W.

[0083] The circuit-side terminals 41U, 41V, and 41W are connected to the control circuit 23. The terminal holder 42 fixes the circuit-side terminals 41U, 41V, and 41W to the substrate 21. The motor-side terminals 43U, 43V, and 43W are connected to the coil of the electric motor 6. The connectors 44U, 44V, and 44W connect the front ends of the circuit-side terminals 41U, 41V, and 41W and the motor-side terminals 43U, 43V, and 43W to each other.

[0084] More specifically, the front 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). In addition, the connectors 44U, 44V, 44W include a pair of cylindrical portions 45U, 45V, 45W, 46U, 46V, 46W that receive the front ends of the circuit-side terminals 41U, 41V, 41W and the motor-side terminals 43U, 43V, 43W. Both sides of the cylindrical portions 45U, 45V, 45W, 46U, 46V, 46W are open in the axial direction. Furthermore, the front ends of the circuit-side terminals 41U, 41V, and 41W are inserted and pulled out of the cylindrical portions 45U, 45V, and 45W in the axial direction. Similarly, the front ends of the motor-side terminals 43U, 43V, and 43W are inserted and pulled out of the cylindrical portions 46U, 46V, and 46W in the axial direction.

[0085] like Figure 2 As shown in FIG. 1 , 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 formed of a metal material (e.g., copper) having a high thermal conductivity. For example, the heat sink 50 is formed by pressing a flat plate to include a heat receiving plate 51 and a heat transfer plate 52 that are bent in a mutually intersecting (orthogonal) manner. That is, the heat sink 50 has a substantially L-shaped appearance.

[0086] Figure 6 The cover 60 is a three-dimensional view obtained by observing the cover 60 from the back side. The cover 60 is integrally formed by injection molding a resin material, for example. That is, the cover 60 is formed of a material having a lower thermal conductivity than the housing 10 and being lighter than the housing 10. Figure 2 and Figure 6 As shown, 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.

[0087] The top wall 61 is a portion covering the second surface 21b of the control substrate 20 (substrate 21). When the cover 60 is mounted on the housing 10, the top wall 61 is spaced apart from the control substrate 20 by a predetermined interval in the axial direction and faces the second surface 21b. In addition, the heat receiving plate 51 of the radiator 50 is mounted on the surface (back surface) of the top wall 61 facing the second surface 21b. The heat receiving plate 51 can be mounted on the top wall 61 by, for example, heat riveting, or can be embedded when the cover 60 is injection molded. Furthermore, screw holes 65a, 65b, 65c, and 65d are formed at the four corners of the top wall 61 and penetrate in the thickness direction.

[0088] The side wall 62 is a frame-shaped portion covering the periphery of the control substrate 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 mounted on the cover 60, the front end of the side wall 62 abuts against the support surface 12 of the housing 10. Thus, a substrate accommodating space 24 for accommodating the control substrate 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 outside of the side wall 62 to hold the connector unit 30.

[0089] The positioning pins 64a to 64d protrude axially from the back of the top wall 61 toward the housing 10 on the inner side of the side wall 62. The positioning pins 64a to 64d are inserted into the corresponding first positioning holes 22a to 22d and second positioning holes 16a to 16d in the axial direction to position the housing 10, the control board 20, and the cover 60. The positioning pins 64a to 64d have a common structure, so the positioning pin 64a will be described below.

[0090] Fig. 7A is a three-dimensional view of the positioning pin 64a, Figure 7B The positioning pin 64a is a view viewed from the front end. The positioning pin 64a as a whole has a tapered shape (truncated cone shape) whose diameter gradually decreases toward the front end. Fig. 7A and Figure 7B As shown, the positioning pin 64a includes a pin body 66 and a plurality of protrusions 67a, 67b, and 67c. The number of the protrusions 67a to 67c may be three or more.

[0091] The pin body 66 protrudes axially from the back of the top wall 61 toward the housing 10. In addition, the pin body 66 has a truncated cone shape. That is, the pin body 66 is a tapered shape with a diameter gradually decreasing toward the front end. Furthermore, the cross section of the pin body 66 (a section perpendicular to the protruding direction) is a perfect circle.

[0092] The protrusions 67a to 67c are provided at positions spaced apart in the circumferential direction on the outer peripheral surface of the pin body 66. More specifically, the protrusions 67a to 67c are provided at equal intervals (120° intervals) in the circumferential direction of the outer peripheral surface of the pin body 66. In addition, the protrusions 67a to 67c protrude in the radial direction of the pin body 66. Furthermore, the protrusions 67a to 67c extend in the extending direction of the pin body 66. In addition, the protrusions 67a to 67c have the same protrusion amount at all positions in the extending direction.

[0093] The results, such as Figure 7BAs shown in FIG. 1 , the diameters of the circumscribed circle C1 and the circumscribed circle C2 (the imaginary circle connecting the protruding front ends of the protrusions 67a to 67c) of the positioning pin 64a gradually decrease toward the front end. However, the structure of the pin body 66 and the protrusions 67a to 67c is not limited to the above example. As another example, the pin body 66 may also be a cylindrical shape with the same diameter in the extending direction. In addition, the protrusions 67a to 67c may also gradually decrease in protrusion amount toward the front end.

[0094] FIG. 8A to FIG. 8C 2 is a diagram showing the relationship between the positioning pin 64a, the first positioning hole 22a, and the second positioning hole 16a. FIG. 8A to FIG. 8C In FIG. 6 , the pin body 66 and the protrusions 67 a to 67 c are not distinguished from each other, and only the outline of the circumscribed circle of the positioning pin 64 a is shown.

[0095] 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 is a tapered shape whose diameter gradually decreases from the front end of the support protrusion 13a toward the base end. That is, in the second positioning hole 16a, the diameter D2 of the open end (the front end side of the support protrusion 13a) is the largest, and the diameter d2 of the rear end (the base end side of the support protrusion 13a) is the smallest. In the positioning pin 64a, the diameter d3 of the front end is the smallest, and the diameter D3 of the base end is the largest. In addition, the circumscribed circle of the positioning pin 64a, the cross-sections of the first positioning hole 22a and the second positioning hole 16a are all perfect circles.

[0096] The diameter d3 of the front end 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. In addition, the diameter D3 of the base end of the positioning pin 64a is larger than the diameter D1 of the first positioning hole 22a. In addition, 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).

[0097] Next, the procedure of assembling the housing 10, the control substrate 20, and the cover 60 is described. At the start of assembly, the control circuit 23 (particularly the circuit element 23c), the circuit side terminal 41U, the circuit side terminal 41V, the circuit side terminal 41W, and the terminal holder 42 are mounted on the substrate 21, and the electric motor 6 mounted with the magnet 8 and the motor side terminal 43U, the motor side terminal 43V, and the motor side terminal 43W is accommodated in the motor accommodation space 11. Figure 5 As shown, the front ends of the circuit-side terminals 41U, 41V, and 41W are inserted into the cylindrical portions 45U, 45V, and 45W.

[0098] First, the positioning pin 64a is inserted into the first positioning hole 22a from the second surface 21b side of the substrate 21. Figure 8B As shown, when the outer peripheral surface of the positioning pin 64a is inserted (so-called low pressure insertion) all around the periphery to the position in contact with the inner peripheral surface of the first positioning hole 22a, the control board 20 and the cover 60 are positioned. At this time, the front end of the positioning pin 64a protrudes toward the first surface 21a side of the substrate 21.

[0099] Next, the positioning pin 64a protruding toward the first surface 21a of the substrate 21 is inserted into the second positioning hole 16a. Figure 8C As shown, when the first surface 21a of the substrate 21 abuts against the front end of the support protrusion 13a, and the front end of the positioning pin 64a is inserted throughout the entire circumference (so-called low pressure insertion) to a position in contact with the inner circumferential surface of the second positioning hole 16a, the housing 10, the control substrate 20, and the cover 60 are positioned.

[0100] 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 radiator support portion 15, and the front ends of the motor side terminal 43U, the motor side terminal 43V, and the motor side terminal 43W are inserted into the cylindrical portion 46U, the cylindrical portion 46V, and the cylindrical portion 46W, and the magnet 8 and the circuit element 23c are positioned at a specified interval.

[0101] Then, when the positioning pin 64a is inserted into the second positioning hole 16a until Figure 8C When the screw holes 17a to 17d and the screw holes 65a to 65d are connected, the cover 60 is fixed to the housing 10 by screwing the screws 18a to 18d into the connected screw holes 17a to 17d and the screw holes 65a to 65d.

[0102] According to the above-described embodiment, for example, the following effects are achieved.

[0103] According to the above embodiment, the housing 10, the control board 20, and the cover 60 are positioned only by inserting the positioning pins 64a to 64d into the first positioning holes 22a to 22d and the second positioning holes 16a to 16d. As a result, compared with the case where the control board 20 and the cover 60 are individually positioned relative to the housing 10, the assembly process can be simplified while maintaining the positional accuracy of the housing 10, the control board 20, and the cover 60.

[0104] In particular, the number of screws can be reduced compared to Patent Document 1, so the work of tightening the screws in the assembly process can be reduced. Furthermore, since the chips generated when the screws are screwed together can be reduced, contamination can be prevented, which helps prevent waste from being generated by reducing defective products. Furthermore, by adopting the resin cover 60, the oil pump device 1 can be made lighter than a metal cover, so it can contribute to carbon neutrality.

[0105] In addition, according to the embodiment, by setting the positioning pins 64a to 64d to be tapered, even if strict position adjustment is not performed when the positioning pins 64a to 64d are inserted into the positioning holes 22a to 22d and the positioning holes 16a to 16d, the housing 10, the control board 20, and the cover 60 are positioned with good accuracy in the end (when the positioning pins 64a to 64d are pressed into the positioning holes 22a to 22d and the positioning holes 16a to 16d). As a result, the assembly process is further simplified.

[0106] According to the above embodiment, the positioning pins 64a to 64d are constituted by the pin body 66 and the protrusions 67a to 67c, so that the contact surface pressure of the positioning pins 64a to 64d with respect to the positioning holes 22a to 22d and the positioning holes 16a to 16d can be reduced.

[0107] In addition, according to the embodiment, by setting the second positioning holes 16a to 16d to a tapered shape, the diameter D2 of the opening end can be increased, so even if strict position adjustment is not performed when the positioning pins 64a to 64d are first inserted, the housing 10, the control board 20, and the cover 60 are finally positioned with good accuracy. As a result, the assembly process is further simplified.

[0108] In addition, according to the embodiment, by making the taper ratio of the positioning pins 64a to 64d smaller than the taper ratio of the second positioning holes 16a to 16d, the positioning pins 64a to 64d are pressed into the second positioning holes 16a to 16d at a low pressure. As a result, the positional accuracy of the housing 10, the control board 20, and the cover 60 is further improved.

[0109] Furthermore, according to the embodiment, by making the positioning pins 64a to 64d and the second positioning holes 16a to 16d into a tapered shape, it is easy to pull out the mold during injection molding. In this regard, it is ideal that the outer peripheral surfaces of the support protrusions 13a to 13d and the screw seats 14a to 14d are also set to a tapered shape with a diameter gradually increasing from the front end toward the base end.

[0110] The above is a description of the embodiments of the present invention. In addition, the present invention is not limited to the embodiments, but also includes various modifications. For example, the embodiments are described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to the embodiments including all the structures described. In addition, a part of the structure of the present embodiment can be replaced with the structure of other embodiments, and the structure of other embodiments can be added to the structure of the present embodiment. In addition, other structures can be added, deleted, or replaced with a part of the structure of the present embodiment.

Claims

1. A control device, comprising: A control substrate on which a control circuit for controlling the electric motor is mounted; A housing supporting a surface on one side of the control substrate in a thickness direction; as well as The cover is mounted on the housing in a manner to cover the other side surface of the control substrate in the thickness direction and the periphery of the control substrate, wherein the control device is characterized in that: The control substrate is formed with a plurality of first positioning holes penetrating in the thickness direction. The housing is provided with a plurality of second positioning holes corresponding to the plurality of first positioning holes respectively. The cover includes a plurality of positioning pins protruding toward the housing and having a conical shape with a diameter of a circumscribed circle gradually decreasing toward a front end. The positioning pins are inserted into the corresponding first positioning holes and the second positioning holes to position the control substrate, the housing, and the cover.

2. The control device according to claim 1, characterized in that: The positioning pin comprises: The pin body has a tapered shape with a diameter gradually decreasing toward the front end; and The protrusions protrude in the radial direction of the pin body at at least three locations separated in the circumferential direction on the outer circumferential surface of the pin body and extend in the extending direction of the pin body.

3. The control device according to claim 1, characterized in that: The housing includes a plurality of support protrusions for supporting the control substrate at the front end. The second positioning hole is extended from the front end of the supporting protrusion toward the base end.

4. The control device according to claim 3, characterized in that: The second positioning hole is in a tapered shape with a diameter gradually decreasing toward the base end of the supporting protrusion. The taper ratio of the positioning pin is smaller than that of the second positioning hole.

5. A motor device, characterized in that: include: an electric motor supported by the housing; as well as The control device according to claim 1 controls the electric motor.

6. The motor device according to claim 5, characterized in that include: A terminal extending from the electric motor toward the control substrate; as well as The connector receives the terminal when the positioning pin is inserted into the corresponding first positioning hole and the second positioning hole, and supplies the driving power generated by the control substrate to the electric motor through the terminal.

7. The motor device according to claim 5, characterized in that: include: a rotating body, rotating together with the rotating shaft of the electric motor; as well as The sensor is fixed to the control substrate, reads the rotation of the rotating body and detects the rotation amount of the electric motor.

8. An oil pump device, characterized in that: include: The motor device as claimed in claim 5; as well as The pump unit pumps oil under pressure using the driving force of the electric motor.

Images