JP7427928B2 - electrical equipment - Google Patents

Description

The present invention relates to electrical equipment.

Conventionally, there have been motor devices in which a motor and a control device thereof are integrally provided. For example, a control device for a motor device disclosed in Patent Document 1 includes a connector, a control board, and a heat sink. A plurality of fixing hooks that protrude toward the control board are provided at the four corners of the connector. The connector is fixed to the control board by the tip of the fixing hook passing through the control board engaging with the back surface of the control board. The control board with the connector attached is fixed to the heat sink with screws.

JP2018-207640A

In the motor device of Patent Document 1, there is no configuration for positioning the control board and the heat sink when attaching the control board to the heat sink. Therefore, in order to make the work of attaching the control board and the heat sink easier, it is conceivable to adopt the following structure as a structure for positioning between the control board and the heat sink. For example, a positioning hole is provided in the control board, and a pin fitted into a recess of the motor is inserted into the hole.

However, when adopting this configuration, it is necessary to provide the control board with a hole for inserting a positioning pin in addition to a hole for inserting the fixing hook of the connector. In the control board, it is difficult to provide electronic components around the positioning holes. Therefore, as the number of holes provided in the control board increases, the area on the control board in which electronic components cannot be provided increases.

An object of the present invention is to provide an electrical device that can reduce the number of positioning holes provided in a substrate.

An electrical device that can achieve the above object includes a board to be attached to an attachment target, an electric component located on the opposite side of the board to the attachment target, and a state in which the electrical component is inserted through a positioning hole provided in the board and the attachment target. It has a positioning member that connects the attachment target and the electrical component in a state where movement in a direction intersecting the arrangement direction of the target and the electrical component is restricted.

According to this configuration, the positioning member is commonly used as a member for positioning between the electric component and the board and a member for positioning between the board and the object to be attached. The number of positioning holes provided in the board can be reduced compared to the case where a member for positioning between the electrical component and the board and a member for positioning between the board and the object to be attached are provided separately. As the number of positioning holes is reduced, the area on the board in which electronic components can be provided can be expanded. Conversely, it is also possible to downsize the substrate by reducing the number of positioning holes.

In the above electric device, the positioning member is provided integrally with the electric component, and an end portion of the positioning member on the opposite side from the electric component penetrates the substrate and is provided in a positioning recess provided in the attachment target. It may be fitted to the

Even in this case, the positioning member is commonly used as a member for positioning between the electric component and the board and a member for positioning between the board and the object to be attached.
In the above electric device, the positioning member is provided integrally with the attachment target, and an end portion opposite to the attachment target penetrates the substrate and forms a positioning recess provided in the electrical component. It may be fitted to the

Even in this case, the positioning member is commonly used as a member for positioning between the electric component and the board and a member for positioning between the board and the object to be attached.
In the above electric device, at least a portion of the positioning member that fits into the recess may be made of metal.

According to this configuration, when the positioning member is attached to and removed from the recess to be attached or the recess of the electrical component, generation of dust due to wear of the positioning member can be suppressed.
In the above electrical device, the electrical component may be a connector.

When adopting this configuration, the electrical device must have a configuration in which the opposite end of the positioning member provided integrally with the electrical component penetrates the board and fits into the recess of the installation target, or the installation target It is preferable to adopt a configuration in which the end of the positioning member integrally provided on the side opposite to the attachment target penetrates the board and fits into the recess of the electrical component.

For example, when a mating connector is connected to the connector, an external force is applied to the connector toward the board and the object to be attached, and this external force is received by the object to be attached via the positioning member. Therefore, the substrate is prevented from being pressed toward the attachment target. Since the stress generated on the substrate is alleviated, distortion of the substrate can be suppressed.

In the electrical device described above, the object to be attached may be a motor for a vehicle.
There is a demand for miniaturization of equipment mounted on vehicles. As mentioned above, in the above-mentioned electrical equipment, the positioning member is commonly used as a member for positioning between the electrical component and the board and a member for positioning between the board and the object to be attached, so that the positioning member is It is possible to reduce the number of holes. As the number of positioning holes is reduced, it is possible to reduce the size of the board and, by extension, the size of the electrical equipment including the board. Therefore, the above electrical equipment is suitable for vehicle use.

According to the electrical device of the present invention, the number of positioning holes provided in the substrate can be reduced.

FIG. 1 is a partial cross-sectional view showing main parts of the first embodiment of the electrical device. FIG. 1 is an exploded partial cross-sectional view of the electrical device according to the first embodiment. FIG. 3 is a partial cross-sectional view showing the main parts of an electrical device of a comparative example. The top view of the board in the electric device of a comparative example. FIG. 7 is a partial cross-sectional view showing main parts of a second embodiment of the electrical device. FIG. 7 is an exploded partial cross-sectional view of an electrical device according to a second embodiment. FIG. 7 is a cross-sectional view showing the tip shape of a positioning pin according to another embodiment. FIG. 7 is a cross-sectional view showing the tip shape of a positioning pin according to another embodiment.

<First embodiment>
Hereinafter, a first embodiment in which an electric device is implemented as a motor device will be described.
As shown in FIG. 1, the motor device 10 includes a motor 11 and a control device 12. The control device 12 is provided at the end of the motor 11 to which it is attached.

The control device 12 includes a connector 21 and a board 22 as electrical components. The board 22 is located between the connector 21 and the motor 11. Connector 21 and board 22 are assembled as a subassembly. A control device 12 as a subassembly is attached to the end of the motor 11.

The connector 21 is attached to the side surface of the board 22 on the opposite side from the motor 11. The connector 21 is integrally provided from a synthetic resin material. The connector 21 has a connector fitting part 31, a plurality of positioning pins 32, and a board fixing part 33.

The connector fitting portion 31 has a rectangular cylindrical shape and is open toward the side opposite to the substrate 22 (the upper side in FIG. 1). A plug connector, which is connected to a DC power source provided outside the motor device 10 via wiring, is fitted into the connector fitting portion 31 as a mating connector, for example.

The positioning pin 32 is provided on the side surface of the connector 21 on the board 22 side (the lower surface in FIG. 1). The positioning pin 32 has a cylindrical shape. The positioning pin 32 extends along the direction in which the connector 21 and the board 22 are arranged (vertical direction in FIG. 1). A cylindrical fitting portion 32a is provided at the tip of the positioning pin 32. The outer diameter of the fitting portion 32a is smaller than the outer diameter of the portion of the positioning pin 32 from the connector fitting portion 31 to the fitting portion 32a.

The board fixing part 33 is a part fixed to the board 22, and has, for example, a cylindrical shape.
Various electronic components 41 are provided on the board 22 . The electronic component 41 is fixed, for example, to the side surface of the substrate 22 opposite to the motor 11 by soldering. Further, the substrate 22 has a plurality of pin insertion holes 42, 42, a first bolt insertion hole 43, and a second bolt insertion hole 44.

The same number of pin insertion holes 42 as the positioning pins 32 of the connector 21 are provided. Each pin insertion hole 42 is provided corresponding to each positioning pin 32. The inner diameter of the pin insertion hole 42 is larger than the outer diameter of the positioning pin 32. Each positioning pin 32, 32 of the connector 21 is inserted into each pin insertion hole 42 from the side opposite to the motor 11.

The first bolt insertion hole 43 is provided corresponding to the board fixing part 33. The inner diameter of the first bolt insertion hole 43 is smaller than the outer diameter of the board fixing portion 33 of the connector 21 . A bolt 45 is inserted into the first bolt insertion hole 43 from the motor 11 side. The connector 21 is fixed to the board 22 by tightening the bolt 45 to the board fixing portion 33 of the connector 21.

The second bolt insertion hole 44 is provided in the board 22 at a position away from the connector 21 .
A plurality of fitting recesses 51 and a board fixing part 52 are provided at the end of the motor 11 .

The same number of fitting recesses 51 as the positioning pins 32 of the connector 21 are provided. The inner diameter of the fitting recess 51 is set to be approximately the same as or slightly larger than the outer diameter of the fitting part 32a provided at the tip of the positioning pin 32. A fitting portion 32 a of a positioning pin 32 passing through the substrate 22 is fitted into the fitting recess 51 .

The board fixing part 52 is a part to which the board 22 is fixed, and has, for example, a cylindrical shape. The board fixing part 52 is provided corresponding to the second bolt insertion hole 44 of the board 22. The outer diameter of the board fixing portion 52 is larger than the inner diameter of the second bolt insertion hole 44 in the board 22. A bolt 53 is tightened to the board fixing portion 52 through the second bolt insertion hole 44 of the board 22. Thereby, the board 22 is fixed to the motor 11.

Next, a procedure for assembling the motor device 10 will be explained.
As shown in FIG. 2, when assembling the motor device 10, the control device 12, which is a subassembly, is first assembled. That is, while bringing the connector 21 and the board 22 close to each other, the positioning pin 32 of the connector 21 is inserted into the pin insertion hole 42 of the board 22 from the side opposite to the motor 11. By engaging the positioning pin 32 with the inner circumferential surface of the pin insertion hole 42, the connector 21 is positioned in the direction along the component surface, which is the surface on which the electronic component 41 of the board 22 is provided. Further, when viewed from the direction in which the connector 21 is attached to the board 22, the board fixing portion 33 of the connector 21 and the first bolt insertion hole 43 of the board 22 are aligned with each other. The positioning pin 32 is inserted into the pin insertion hole 42 until the tip of the board fixing portion 33 contacts the peripheral portion of the first bolt insertion hole 43 on the component surface of the board 22 . Thereafter, the bolt 45 is inserted into the first bolt insertion hole 43 of the board 22 from the side opposite to the connector 21, and the bolt 45 is tightened to the board fixing part 33. Thereby, the connector 21 is fixed to the board 22. With the above steps, the assembly work of the control device 12 is completed.

Next, the control device 12, which is a subassembly, is attached to the end of the motor 11. That is, the fitting portion 32a at the tip of the positioning pin 32 passing through the substrate 22 is fitted into the fitting recess 51 of the motor 11 while bringing the substrate 22 and motor 11 close to each other. Thereby, the board 22 is positioned in the direction along the end surface of the motor 11. Furthermore, when viewed from the direction in which the board 22 is attached to the motor 11, the second bolt insertion hole 44 of the board 22 and the board fixing portion 52 of the motor 11 coincide with each other.

The movement of the control device 12 and the motor 11 in the direction in which the control device 12 and the motor 11 approach each other is performed when the step surface 32b between the portion of the positioning pin 32 from the connector fitting portion 31 to the fitting portion 32a and the fitting portion 32a is moved toward the motor 11. It is regulated by coming into contact with the peripheral portion of the fitting recess 51 on the end face of the fitting recess 51 . At this time, the tip of the board fixing portion 52 of the motor 11 comes into contact with the peripheral portion of the second bolt insertion hole 44 of the board 22. In this state, the bolt 53 is inserted into the second bolt insertion hole 44 of the board 22 from the side opposite to the motor 11, and the bolt 53 is tightened to the board fixing part 52. This fixes the substrate 22 and thus the control device 12 as a subassembly to the end of the motor 11. With the above steps, the assembly work of the motor device 10 is completed.

Next, the operation of the first embodiment will be explained.
As in the comparative example shown in FIG. It is conceivable that the positioning with respect to the motor 11 is performed using a pin 62 which is a member different from the connector 21. However, when adopting this configuration, it is necessary to separately provide pin insertion holes 63, 63 for inserting the pins 61, 61 and pin insertion hole 64 for inserting the pin 62. For this reason, the following concerns arise.

As shown in FIG. 4, in the substrate 22, the parts where pin insertion holes 63, 63, 64, which are positioning holes, are provided and the areas A1, A2, A3 around the pin insertion holes 63, 63, 64 have electronic Difficult to install parts. Also, in the substrate 22, in the portion where the first bolt insertion hole 43 and the second bolt insertion hole 44 are provided, and in the areas A4 and A5 around the first bolt insertion hole 43 and the second bolt insertion hole 44. It is difficult to install electronic components. Therefore, as the number of holes provided in the substrate 22 increases, the area on the substrate 22 in which electronic components cannot be provided increases.

In this regard, in this embodiment, the positioning between the connector 21 and the board 22 and the positioning between the board 22 and the motor 11 are performed using common positioning pins 32, 32. Therefore, it is sufficient to provide pin insertion holes 42, 42 in the substrate 22 for inserting the positioning pins 32, 32. Therefore, compared to the case where separate pins are used for positioning between the connector 21 and the board 22 and between the board 22 and the motor 11, the number of positioning holes provided in the board 22 is reduced. Is possible.

For example, in the comparative example shown in FIG. 3, it is possible to adopt a configuration in which the pin 62 for positioning between the board 22 and the motor 11 is omitted as the control device 12. Furthermore, it is possible to adopt a configuration in which the pin insertion hole 64 into which the pin 62 is inserted is omitted as the substrate 22. Therefore, the area on the substrate 22 where it is difficult to provide electronic components can be reduced. That is, in the comparative example shown in FIG. 3, electronic components can be provided in the portion where the pin insertion hole 64 is provided and the area A3 around the pin insertion hole 64. Conversely, instead of providing electronic components, it is also possible to eliminate the portion of the board 22 where the pin insertion hole 64 is provided and the area A3 around the pin insertion hole 64. Since the pin insertion hole 64 and the area A3 around it are not provided, the substrate 22 can be made smaller.

Therefore, according to the first embodiment, the following effects can be obtained.
(1) The positioning pin 32 is commonly used as a pin for positioning between the connector 21 and the board 22 and a pin for positioning between the board 22 and the motor 11. Compared to the case where positioning pins between the connector 21 and the board 22 and positioning pins between the board 22 and the motor 11 are provided separately, the number of positioning holes provided in the board 22 can be reduced. can. As the number of positioning holes is reduced, the area on the board 22 where electronic components can be provided can be expanded. Conversely, it is also possible to downsize the substrate 22 by reducing the number of positioning holes.

(2) In the assembled state of the motor device 10, the stepped surface 32b between the portion of the positioning pin 32 from the connector fitting portion 31 to the fitting portion 32a and the fitting portion 32a is It is kept in contact with the peripheral portion of the mating recess 51. When the plug connector is fitted to the connector fitting portion 31, an external force acts on the connector 21 toward the board 22 and the motor 11, and this external force is applied to the end surface of the motor 11 via the stepped surface 32b of the positioning pin 32. It is accepted by Therefore, the board 22 is prevented from being pressed toward the motor 11 via the board fixing portion 33 of the connector 21. As a result, the stress generated in the substrate 22 is relaxed, thereby suppressing distortion of the substrate 22. Therefore, the plug connector can be attached to the connector fitting portion 31 while maintaining the board 22 in a good installation state.

(3) The positioning pin 32 is integrally molded as a part of the connector 21 from a synthetic resin material. Therefore, the number of parts can be reduced compared to the case where the positioning pin 32 is provided as a separate member from the connector 21.

(4) The motor device 10 is suitable as a drive source for a vehicle. That is, there is a demand for miniaturization of equipment mounted on vehicles. As described above, in the motor device 10, the positioning pins 32 are commonly used as the pins for positioning between the connector 21 and the board 22 and the pins for positioning between the board 22 and the motor 11. It is possible to reduce the number of holes. By reducing the number of positioning holes, it is possible to reduce the size of the board 22 and, by extension, the size of the motor device 10 including the board 22. Therefore, the motor device 10 is suitable for in-vehicle use.

<Second embodiment>
Next, a second embodiment of the electric device will be described. This embodiment differs from the first embodiment in the configuration of the positioning pin. Therefore, the same members and configurations as in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

As shown in FIG. 5, on the side surface of the connector 21 on the substrate 22 side (lower surface in FIG. 5), a connector support portion 34a is provided at a portion corresponding to the first bolt insertion hole 43 of the substrate 22. . A bolt insertion hole 34 is provided in a portion of the connector 21 that corresponds to the connector support portion 34a. Further, a plurality of fitting recesses 35, 35 are provided on the side surface of the connector 21 on the board 22 side (lower surface in FIG. 5).

In addition to the board fixing part 52, a plurality of positioning pins 54 and a connector fixing part 55 are provided on the end surface of the motor 11.
The same number of positioning pins 54 as the fitting recesses 35 of the connector 21 are provided. The positioning pin 54 extends along the direction in which the connector 21 and the board 22 are arranged (vertical direction in FIG. 5). A cylindrical fitting portion 54a is provided at the tip of the positioning pin 54. The outer diameter of the fitting portion 54a is smaller than the outer diameter of the portion of the positioning pin 54 from the motor 11 to the fitting portion 54a. The positioning pin 54 is inserted into the pin insertion hole 42 of the board 22 from the motor 11 side. The fitting portion 54a of the positioning pin 54 is fitted into the fitting recess 35 of the connector 21 from the motor 11 side. The connector 21 is supported by the motor 11 by a positioning pin 54.

The connector fixing portion 55 is a portion to which the connector 21 is fixed, and has, for example, a cylindrical shape. The connector fixing portion 55 is provided corresponding to the first bolt insertion hole 43 of the board 22. The outer diameter of the connector fixing portion 55 is larger than the inner diameter of the first bolt insertion hole 43 in the board 22. A bolt 56 is fastened to the connector fixing portion 55 through the bolt insertion hole 34 of the connector 21 and the first bolt insertion hole 43 of the board 22. Thereby, the connector 21 is fixed to the motor 11.

Incidentally, a bolt 53 is tightened to the board fixing portion 52 of the motor 11 through the second bolt insertion hole 44 of the board 22. Thereby, the board 22 is fixed to the motor 11.

Next, a procedure for assembling the motor device 10 will be explained.
As shown in FIG. 6, when assembling the motor device 10, the substrate 22 is first attached to the end of the motor 11. That is, the positioning pins 54, 54 of the motor 11 are inserted into the pin insertion holes 42, 42 of the board 22 while bringing the board 22 and motor 11 close to each other. The movement of the board 22 and the motor 11 in the direction in which they approach each other is caused by the connector fixing portion 55 of the motor 11 coming into contact with the peripheral portion of the first bolt insertion hole 43 on the side surface of the board 22 on the motor 11 side, and The board fixing portion 52 of the motor 11 is regulated by coming into contact with the peripheral portion of the second bolt insertion hole 44 on the side surface of the board 22 on the motor 11 side. In addition, the positioning pin 54 engages with the inner peripheral surface of the pin insertion hole 42, so that the board 22 is positioned in the direction along the end surface of the motor 11.

With the board 22 positioned with respect to the end surface of the motor 11 by the positioning pins 54 and 54, and with the board 22 supported by the connector fixing part 55 and the board fixing part 52, the second bolt insertion hole of the board 22 is inserted. 44 from the side opposite to the motor 11, and tighten the bolt 53 to the board fixing part 52. Thereby, the board 22 is fixed to the end of the motor 11.

Next, while bringing the motor 11 to which the board 22 is attached and the connector 21 close to each other, the fitting parts 54a, 54a of the positioning pins 54, 54 passing through the board 22 are fitted into the fitting recesses 35, 35 of the connector 21. Match. The movement of the motor 11 to which the board 22 is attached and the connector 21 in the direction of approaching each other is caused by the step surface between the portion of the positioning pin 54 from the end surface of the motor 11 to the fitting portion 54a and the fitting portion 54a. 54b is regulated by coming into contact with the peripheral portion of the fitting recess 35 on the side surface of the connector 21 on the motor 11 side.

By fitting the fitting parts 54a, 54a of the positioning pins 54, 54 into the fitting recesses 35, 35 of the connector 21, the connector 21 can be moved in the direction along the end surface of the motor 11, and further in the direction along the component surface of the board 22. Positioned. At this time, when viewed from the direction in which the connector 21 is attached to the motor 11, the bolt insertion hole 34 of the connector 21 is aligned with the first bolt insertion hole 43 of the board 22 and the connector fixing portion 55 of the motor 11. In this state, the bolt 56 is inserted into the bolt insertion hole 34 of the connector 21 from the side opposite to the motor 11, and the bolt 56 is tightened to the connector fixing portion 55 of the motor 11. Thereby, the connector 21 is fixed to the end of the motor 11 while being supported by the positioning pins 54, 54. The end surface (lower end surface in the figures and FIG. 6) of the connector support portion 34a is maintained in contact with the substrate 22. With the above steps, the assembly work of the motor device 10 is completed.

Therefore, according to the second embodiment, the same effects as (1) to (4) of the first embodiment can be obtained.
<Other embodiments>
Note that the first and second embodiments may be modified and implemented as follows.

- In the first and second embodiments, the electronic component 41 may be provided on both sides of the board 22.
- As shown in FIG. 7, in the first embodiment, a configuration may be adopted in which the fitting portion 32a is omitted as the positioning pin 32. In this case, the positioning pin 32 has the same outer diameter over its entire length. The inner diameter of the fitting recess 51 of the motor 11 may be changed as appropriate depending on the outer diameter of the positioning pin 32. Incidentally, in the second embodiment, a configuration may be adopted in which the fitting portion 54a is omitted as the positioning pin 54.

- As shown in FIG. 8, in the first embodiment, the main body portion of the positioning pin 32 and its fitting portion 32a may be provided as separate members. For example, the positioning pin 32 is formed by molding a portion of the metal pin 36 with a synthetic resin material. A portion of the metal pin 36 that protrudes from the main body portion of the positioning pin 32 functions as a fitting portion 32a. In this way, for example, when the control device 12, which is a subassembly, is attached to and detached from the motor, generation of dust due to wear of the positioning pin 32 can be suppressed. Further, compared to the case where the entire positioning pin 32 is formed of a synthetic resin material, variations in the shape of the positioning pin 32 between products can be suppressed. Therefore, the accuracy of positioning by the positioning pin 32 is improved. Incidentally, in the second embodiment, a configuration may be adopted in which a portion of the metal pin is molded with a synthetic resin material as the positioning pin 54.

- In the first and second embodiments, the entire positioning pins 32 and 54 may be made of a metal material.
- In the first embodiment, the positioning pin 32 is provided as a part of the connector 21, but the positioning pin 32 may be provided as a separate member from the connector 21. In this case, the end of the positioning pin 32 on the side opposite to the motor 11 is fitted into a positioning recess provided on the side surface of the connector 21 on the motor 11 side. Further, in the second embodiment, the positioning pin 54 is provided integrally with the motor 11, but the positioning pin 54 may be provided as a separate member from the motor 11. In this case, the end of the positioning pin 54 on the side opposite to the connector 21 is fitted into a positioning recess provided on the end surface of the motor 11.

- In the first and second embodiments, the board 22 is supported by the board fixing part 52 provided on the end face of the motor 11, but a configuration in which the board fixing part 52 is omitted is adopted as the motor 11. Good too. In this case, the board 22 is attached to the end surface of the motor 11 while being in contact with it. That is, no gap is formed between the substrate 22 and the end surface of the motor 11.

- In the first and second embodiments, the end of the motor 11 may be provided with a heat sink or a cover as a part thereof. In such a case, the control device 12 may be attached to a heat sink or a cover as an attachment target.

- The use of the motor device 10 of the first and second embodiments is not limited to in-vehicle use. The motor device 10 may be used in products other than vehicles.
- In the first and second embodiments, the electric device is embodied in the motor device 10, but it may be embodied in a device such as an electric pump using the motor 11 as a drive source. In this case, the control device 12 is attached, for example, to the housing of the device to which it is attached.

- In the first and second embodiments, the electric device is embodied in the motor device 10, but it may be embodied in a mechanical device having a drive source other than a motor.

10... Motor device (electrical equipment), 11... Motor (attachment target), 21... Connector (electrical component), 22... Board, 32, 54... Positioning pin (positioning member), 35, 51... Fitting recess (recess) .

Claims (2)

A board to be attached to the end of the motor to be attached,
a connector that is an electrical component located on the opposite side of the board from the motor ;
a positioning member that connects the motor and the connector in a state that passes through a positioning hole provided in the substrate and is restricted from moving in a direction intersecting the direction in which they are arranged with respect to the motor and the connector ; , has
The positioning member is provided integrally with the connector, and an end of the positioning member opposite to the connector penetrates the board and fits into a positioning recess provided at an end of the motor. It has a fitting part that fits,
The positioning member is a stepped surface provided between a portion of the positioning member extending from the connector to the fitting portion and the fitting portion, and is in contact with a peripheral portion of the recess on an end surface of the motor. Has a stepped surface,
The connector is a board fixing part that is fixed to the board, and has an end opposite to the connector in the direction in which the connector and the board are lined up on a surface of the board facing the connector. Electrical equipment that has a board fixing part that comes into contact with it . The electrical device according to claim 1, wherein at least a portion of the positioning member that fits into the recess is made of metal.