WO2019198565A1

WO2019198565A1 - Motor unit

Info

Publication number: WO2019198565A1
Application number: PCT/JP2019/014619
Authority: WO
Inventors: 一美古林
Original assignee: 日本電産サンキョー株式会社
Priority date: 2018-04-10
Filing date: 2019-04-02
Publication date: 2019-10-17
Also published as: JP2019187092A; DE112019001867T5

Abstract

Provided is a motor unit equipped with a structure in which the position of a substrate is specified with respect to a case member in which a motor and the substrate are housed. Specifically, the motor unit is provided with: a motor body; a substrate attached to the outer periphery of the motor body; a first case member for housing the motor body and the substrate; and a second case member attached to the first case member and covering the motor body and the substrate. The substrate is engaged with the first and second case members and has: a first position-to-be-specified portion where a position in either one of first and second directions along the axis line of the drive shaft of the motor body is specified while being engaged with the first case member; and a second position-to-be-specified portion where a position in the other of the first and second directions is specified while being engaged with the second case member.

Description

Motor unit

The present invention relates to a motor unit.

Conventionally, a motor is provided with a substrate on the outer periphery of the motor. This board is electrically connected to a motor terminal extending from the motor, and is provided for supplying electric power for driving to the motor and transmitting / receiving electric signals for controlling the driving of the motor.

Generally, a motor to which a substrate is attached is incorporated into a housing or the like to be unitized and attached to a device or the like that uses the driving force of the motor. At this time, when the motor is incorporated in a housing or the like, it is necessary to define the mounting positions of the motor and the substrate with respect to the housing.

To solve this problem, there is a motor (Patent Document 1) that attaches an upper plate and a lower plate to the motor and holds the substrate by the upper plate and the lower plate, thereby defining the mounting position of the substrate with respect to the motor. is there.

JP 2008-199875 A

However, in the motor described in Patent Document 1, the mounting position of the board with respect to the motor is defined. For example, when the motor is incorporated in a housing, the mounting position and mounting accuracy of the board with respect to the housing are sufficiently considered. It was not what was done.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a motor unit having a structure in which the position of the substrate is defined with respect to a case member that accommodates the motor and the substrate.

To achieve the above object, a motor unit according to a first aspect of the present invention includes a motor body, a board attached to the outer periphery of the motor body, a first case member that houses the motor body and the board, A second case member attached to the first case member and covering the motor body and the substrate, wherein the substrate engages with the first case member and the second case member, respectively, and the first case In a state where it is engaged with a member, a first position definition in which a position in one of a first direction along the axis of the drive shaft of the motor body and a second direction which is a direction intersecting the first direction is defined. And a second position defining portion that defines a position in one of the first direction and the second direction in a state of being engaged with the second case member. To.

In the present specification, “the outer periphery of the motor main body” means not only the configuration of being attached to the outer surface of the motor main body but also the configuration of being attached at an interval from the outer surface.

According to this aspect, the substrate is engaged with the first case member and the second case member, respectively, and in a state where the substrate is engaged with the first case member, the substrate extends along the axis of the drive shaft of the motor body. The first direction in a state where the first case defining member is engaged with the first position defining portion, the position of which is defined in any one of the first direction and the second direction that intersects the first direction, and the second case member. And a second position defining portion in which a position in the other of the second directions is defined, so that the first case member is in the first direction or the second direction with respect to the first case member. The position of the board | substrate can be prescribed | regulated and the position of the said board | substrate in any one direction of a 1st direction and a 2nd direction can be prescribed | regulated with respect to the said 2nd case member.

A motor unit according to a second aspect of the present invention is the motor unit according to the first aspect, wherein the first position defining portion is recessed toward the other end at the one end in the first direction in the substrate. The second position defining portion is formed as a recess that is recessed toward the one end at the other end, and the first case member includes the first cover of the substrate. A convex first position defining portion that protrudes toward the position defining portion and engages with the first position defined portion is formed, and the second case member is formed on the second position defined portion of the substrate. A convex second position defining portion that protrudes toward and engages with the second position defined portion is formed.

According to this aspect, the first case member is formed with a convex first position defining portion that protrudes toward the first position defined portion of the substrate and engages with the first position defined portion. The second case member is formed with a convex second position defining portion that protrudes toward the second position defined portion of the substrate and engages with the second position defined portion. That is, by engaging the first convex position defining portion with the concave first position defining portion and engaging the convex second position defining portion with the concave second position defining portion, The position of the substrate can be easily defined with respect to the case member and the second case member. Accordingly, the first case member, the second case member, and the second substrate can be positioned with a simple configuration.

In the motor unit according to a third aspect of the present invention, in the second aspect, the first position defining unit defines a position in the first direction with respect to the substrate, and the second position defining unit includes: A position in the second direction is defined with respect to the substrate.
According to this aspect, the effect in the 2nd aspect mentioned above can be acquired.

In the motor unit according to a fourth aspect of the present invention, in the second or third aspect, the motor main body is provided with a bearing portion that rotatably supports the drive shaft, and the first case member includes A fitting portion that fits with the bearing portion of the motor body is formed, and the fitting portion defines a radial position of the motor body when the fitting portion and the bearing portion are fitted. It is characterized by that.

According to this aspect, the motor body is provided with a bearing portion that rotatably supports the drive shaft, and the first case member has a fitting portion that fits with the bearing portion of the motor body. In the state where the fitting portion and the bearing portion are formed, the fitting portion defines a radial position of the motor body. Therefore, the position of the motor with respect to the first case member can be easily defined by fitting the fitting portion and the bearing portion.

The motor unit according to a fifth aspect of the present invention is the motor unit according to the fourth aspect, wherein the second case member has the motor main body in a state where the bearing portion of the motor main body is fitted to the fitting portion. A contact portion that contacts is formed, and the contact portion comes into contact with the motor body, whereby the first position defining portion and the first position defining portion of the substrate are in contact with each other.

According to this aspect, since the contact portion comes into contact with the motor body, the first position defining portion and the first position defining portion of the substrate come into contact with each other. The position of the substrate relative to the case member can be defined. In addition, since the substrate comes into contact with the first position defining portion when the contact portion comes into contact with the motor main body, even if vibration or impact is applied to the motor unit, The engagement state with the first position defining portion is difficult to be released, and the position of the substrate with respect to the first case member can be stabilized.

The motor unit according to a sixth aspect of the present invention is the motor unit according to any one of the second to fifth aspects, wherein the second position defining portion is the second position at least at one end in the second direction. It is characterized by being in contact with the defining portion.

According to this aspect, since the second position defining portion is in contact with the second position defined portion at at least one end in the second direction, the second position defining portion is in the second direction with respect to the second case member. The position of the substrate can be defined more reliably.

The motor unit according to a seventh aspect of the present invention is the motor unit according to any one of the second to fifth aspects, wherein the first position defining portion of the substrate is the first position defining portion in the first direction. The position of the substrate in the first direction is defined, and the second position defining portion of the substrate is the second position defining portion of the second position defining portion. The position of the substrate in the second direction is defined by contact with both end portions in the direction.

According to this aspect, the first position defining portion of the substrate is in contact with the substrate-side end portion of the first position defining portion in the first direction, whereby the first position of the substrate is determined. A position in the direction is defined, and the second position defining portion of the substrate is in contact with both ends of the second position defining portion in the second direction, whereby the position of the substrate in the second direction is determined. Therefore, the position of the substrate in the first direction and the second direction can be more reliably defined.

A motor unit according to an eighth aspect of the present invention is the motor unit according to any one of the second to seventh aspects, wherein the second case member is a direction intersecting the first direction and the second direction. A connector connecting portion that extends along a direction, is disposed on one side in the third direction, and is open on the other side, and the connector connecting portion has the second position in the second direction. The position relative to the defining portion is defined, and at least one connection terminal extending from the substrate toward the other side in the third direction and accommodated in the connector connecting portion is connected to the substrate. It is characterized by that.

According to this aspect, the second case member extends along a third direction that is a direction intersecting the first direction and the second direction, and the substrate is disposed on one side in the third direction. A connector connecting portion having an opening on the other side, wherein the connector connecting portion is defined with respect to the second position defining portion in the second direction, and the substrate has the third direction from the substrate to the third direction. Is connected to at least one connection terminal that extends toward the other side and is accommodated in the connector connection portion. In this configuration, the position of the connector connecting portion relative to the second position defining portion is defined in the second direction, so that the substrate and the position are defined via the second position defining portion and the second position defined portion. A position in the second direction with respect to the connector connecting portion is positioned. As a result, it is possible to position the connector connecting portion and the connecting terminal in the second direction.

The motor unit according to a ninth aspect of the present invention is the motor unit according to the eighth aspect, wherein the first case member is formed with an attachment surface for attaching the second case member, and the attachment surface is in the first direction. In a state where the position with respect to the first position defining portion is defined and the second case member is attached to the mounting surface, the positions of the connector connecting portion and the first position defining portion in the first direction are defined. It is characterized by that.

According to this aspect, in the state where the mounting surface is defined with respect to the first position defining portion in the first direction and the second case member is attached to the mounting surface, the connector in the first direction is provided. Since the positions of the connecting portion and the first position defining portion are defined, the positions of the connector connecting portion and the substrate can be defined. As a result, it is possible to position the connector connecting portion and the connection terminal in the first direction.

In the motor unit according to a tenth aspect of the present invention, in the eighth or ninth aspect, at least one through hole is formed in the substrate, and the connection terminal has one side in the third direction. A positioning portion having a dimension larger than the diameter dimension of the through-hole in at least one of the first direction and the second direction between the end of the through-hole and the end on the other side. When the connection terminal is passed, the connection portion is positioned with respect to the substrate in the third direction by contacting the peripheral portion of the through hole with the positioning portion.

According to this aspect, when the connection terminal is passed through the through hole, the positioning portion comes into contact with the peripheral edge of the through hole, whereby the connection terminal is positioned with respect to the substrate in the third direction. Therefore, the position of the connection terminal in the connector connection portion can be defined. As a result, for example, it is possible to easily connect with a connector attached to and detached from the connector connecting portion.

The motor unit according to an eleventh aspect of the present invention is the motor unit according to any one of the eighth to tenth aspects, wherein the motor body extends from the motor body toward the other side in the third direction. A motor terminal; and the motor terminal is passed through the board and connected to the board on the other surface of the board, and the connection terminal is passed through the board and the motor. It is connected with respect to the said board | substrate in the surface of the one side of the said board | substrate which opposes a main body, It is characterized by the above-mentioned.

According to this aspect, the motor terminal is passed through the board and connected to the board on the other surface of the board, and the connection terminal is passed through the board and the motor. It is connected with respect to the said board | substrate in the surface of the one side of the said board | substrate facing a main body. For example, after performing the operation of connecting the connection terminal to the board, the motor terminal is passed through the board to which the connection terminal is connected, and one side of the board opposite to the side facing the motor body is provided. Since the connection work of the board and the motor terminal can be performed in this aspect, the work of attaching the board to the motor body can be facilitated, and workability can be improved.

According to the present invention, the position of the substrate in one of the first direction and the second direction with respect to the first case member is defined, and the first direction and the second direction with respect to the second case member. The position of the substrate in one of the other directions can be defined.

1 is an external perspective view of a motor unit according to the present invention. The perspective view which shows the state which removed the 2nd case member from the motor unit. The perspective view of the motor main body and board | substrate which concern on this invention. The perspective view of a board | substrate and a connection terminal. The front view of a board | substrate. The perspective view of a connection terminal. The top view which shows the connection state of a motor and a board | substrate. The perspective view of a 1st case member. The perspective view which shows the lower surface side of the 1st case member in the state which attached the motor main body to the 1st case member. FIG. 9 is a cross-sectional view taken along line AA in FIG. 8. The perspective view of the 2nd case member. BB sectional drawing in FIG. Sectional drawing which shows the motor attached to the 1st case member and the 2nd case member. Sectional drawing which shows the relationship between a board | substrate, a 1st position definition part, and a 2nd position definition part. (A) is an enlarged view of a C portion in FIG. 14, and (B) is an enlarged view of a D portion in FIG. The perspective view which shows the change form of a 2nd case member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about the same structure in each Example, the same code | symbol is attached | subjected and it demonstrates only in the first Example, The description of the structure is abbreviate | omitted in a subsequent Example.

FIG. 1 is an external perspective view of a motor unit according to the present invention, FIG. 2 is a perspective view showing a state where a second case member is removed from the motor unit, and FIG. 3 is a perspective view of the motor main body and substrate according to the present invention. FIG. 4 is a perspective view of the substrate and connection terminals, and FIG. 5 is a front view of the substrate.

6 is a perspective view of the connection terminal, FIG. 7 is a plan view showing a connection state between the motor and the substrate, FIG. 8 is a perspective view of the first case member, and FIG. 9 is a motor attached to the first case member. FIG. 10 is a perspective view showing the lower surface side of the first case member in a state in which the main body is attached, and FIG.

11 is a perspective view of the second case member, FIG. 12 is a cross-sectional view taken along line BB in FIG. 11, and FIG. 13 is a cross-sectional view showing the motor attached to the first case member and the second case member. 14 is a cross-sectional view showing the relationship between the substrate and the first position defining portion and the second position defining portion. FIG. 15A is an enlarged view of a portion C in FIG. 14, and FIG. It is an enlarged view of the D section in Drawing 14, and Drawing 16 is a perspective view showing the change form of the 2nd case member.

In the XYZ coordinate system shown in each figure, the X direction is the first direction, that is, the motor axial direction, and the Y axis direction is the second direction, that is, the direction intersecting the motor axial direction. The Z-axis direction is the third direction, that is, the direction in which the connection terminals extend.

<<< embodiment >>>
<< About the outline of the motor unit >>>>
The motor unit 10 in the present embodiment will be described with reference to FIGS. 1 to 3 and 9. The motor unit 10 includes a first case member 12, a second case member 14, a third case member 16, a motor body 18 (FIGS. 2 and 3), and a substrate 20 (FIGS. 2 and 3). ing.

1 and 9, in the present embodiment, the first case member 12 is configured as a box-shaped member that opens on the + X-axis direction side. Similarly, although not shown, the third case member 16 is configured as a box-shaped member having an opening on the −X axis direction side. In the present embodiment, the first case member 12 is detachably attached to the third case member 16 to constitute a box-shaped member having an internal space.

Specifically, the first case member 12 is provided with a plurality of hooked portions 12a protruding in the + X axis direction side. On the other hand, when the first case member 12 is attached to the third case member 16, the third case member 16 is provided with a hook-like hooking portion 16a at a position corresponding to the hooked portion 12a. The first case member 12 and the third case member 16 are integrated by the hooked portion 16a being hooked on the hooking portion 16a.

The upper surface 12 b of the first case member 12 is configured as an attachment surface for the second case member 14. As shown in FIG. 8, an opening 12c and a motor housing portion 12d are formed on the upper surface 12b of the first case member 12. A driving force output unit 22 for outputting a driving force from the motor unit 10 to a driving target is disposed in the opening 12c. The driving force output unit 22 is provided to be rotatable with respect to the first case member. As shown in FIGS. 2 and 8, a hook-shaped hooking portion 12e is formed on the outer peripheral surface of the motor housing portion 12d.

In the present embodiment, the second case member 14 is formed as a box-shaped member, a part of which opens to the + X axis direction side. As shown mainly in FIGS. 1 and 11, the second case member 14 has a hooked portion 14a. As shown in FIG. 1, the second case member 14 is attached to the first case member 12 by hooking the hooked portion 14 a of the second case member 14 to the hooking portion 12 e of the first case member 12. Removably attached.

As shown in FIGS. 2 and 9, in the state where the motor main body 18 is accommodated in the motor accommodating portion 12d of the first case member 12, the + X axial direction end of the first case member 12, specifically, the motor accommodating. From the bottom surface of the portion 12d, the drive shaft 18a of the motor body 18 and the pinion gear 24 attached to the drive shaft 18a protrude in the + X-axis direction. In other words, the drive shaft 18a and the pinion gear 24 of the motor main body 18 accommodated in the motor accommodating portion 12d protrude into an internal space (not shown) formed by the first case member 12 and the third case member 16.

A plurality of gears (not shown) are provided in an internal space (not shown) formed by the first case member 12 and the third case member 16, and the pinion gear 24 rotates via the plurality of gears (not shown). That is, the driving force of the motor body 18 is configured to be transmitted to the driving force output unit 22.

<< About the motor body >>>>
The configuration of the motor body 18 will be described with reference to FIGS. 3 and 13. The motor body 18 is configured as a stepping motor as an example in the present embodiment, but is not limited to this configuration, and may be configured with a DC motor or the like.

As shown in FIG. 13, the motor body 18 includes a drive shaft 18a, a stator 18b constituting a motor case, and a rotor 18c arranged inside the stator 18b. The rotor 18c includes a drive shaft 18a and a permanent magnet 18d fixed to the drive shaft 18a. A drive coil 18e is provided on the stator 18b. Further, a bearing portion 18f for supporting the drive shaft 18a is provided at an end portion on the + X axis direction side of the stator 18b.

As shown in FIG. 3, the motor main body 18 includes a plurality of motor terminals 18g protruding from the stator 18b toward the + Z-axis direction. In the present embodiment, the winding end of the drive coil 18e is wound around the motor terminal 18g. In the present embodiment, the plurality of motor terminals 18g protrude toward the substrate 20 side. In the present embodiment, the motor terminal 18g with which the winding end of the drive coil 18e is entangled is electrically connected to the substrate 20.

<<< About the Board >>>
A substrate 20 is attached to the outer periphery of the motor body 18. Hereinafter, the configuration of the substrate 20 will be described with reference to FIGS. 4 to 6, and the attachment of the substrate 20 to the motor body 18 will be described with reference to FIG.

3 and 4, a plurality of connection terminals 26 are connected to the substrate 20. In this embodiment, the board | substrate 20 is comprised as a flat member. The board | substrate 20 in this embodiment is comprised as an electric power feeding board | substrate which supplies electric power to the motor main body 18 as an example. The motor body 18 in the present embodiment is configured to receive power supply from the substrate 20 via the motor terminal 18g.

In addition, the board | substrate in this embodiment includes the control board etc. which transmit / receive only the control signal of the motor main body 18, without providing a power feeding function. In the present embodiment, the substrate 20 is configured as a substrate that supplies power to the stepping motor. However, for example, when the motor is configured by a motor other than the stepping motor, the substrate 20 not only supplies power to the motor body 18 but also the motor body. 18 control signals may be configured to be able to be transmitted / received, or only control signals may be transmitted / received to / from the motor body 18.

4 and 5, the substrate 20 includes at least one first through hole 28, at least one second through hole 30, a first position defining portion 32, and a second position defining portion. 34 is formed. In the present embodiment, the first through hole 28 and the second through hole 30 are formed in six places on the substrate 20 as an example.

As shown in FIG. 5, in this embodiment, the peripheral portion 28a of the first through hole 28 forms a land where a conductive material, for example, a conductive metal foil such as copper is exposed. In the present embodiment, the land formed on the peripheral edge 28a of the first through hole 28 is formed on the first surface 20a side of the substrate 20 as shown in FIG. It is also formed on the surface 20b side. In the present embodiment, the diameter of the first through hole 28 is d1.

The peripheral portion 30a of the second through hole 30 also forms a land where a conductive material, for example, a conductive metal foil such as copper is exposed, as an example. In the present embodiment, the land formed on the peripheral portion 30a of the second through hole 30 is formed on the first surface 20a side of the substrate 20 as shown in FIG. In the present embodiment, the first surface 20 a of the substrate 20 is a surface facing the opposite side of the motor body 18 in a state where the substrate 20 is attached to the motor body 18, and the second surface 20 b is connected to the motor body 18. It is a surface facing the opposite side.

In FIG. 5, when the substrate 20 is viewed in plan, the plurality of first through holes 28 are located closer to the + X-axis direction side end portion from the central portion in the X-axis direction of the substrate 20 and are arranged in two rows toward the + Y-axis direction. Are arranged side by side. Three first through holes 28 are formed in each row. The first through holes 28 are provided at appropriate intervals in the Y-axis direction.

In the present embodiment, three second through holes 30 are provided in the X-axis direction on the outer side of the first through-hole 28, that is, near the end on the −X axis direction side and the + X axis direction side. . In the present embodiment, at least two of the second through holes 30 are at least partially inserted between the first through holes 28 adjacent to each other in the Y-axis direction, that is, the region W1 between the first through holes 28. Is formed. With this configuration, the first through hole 28 and the second through hole 30 that are close to each other in the X-axis direction can be brought close to each other, and the distance between the first through hole 28 and the second through hole 30 can be shortened. Can be reduced in size in the X-axis direction.

Further, referring to FIG. 5, the first position defining portion 32 is provided at the + X-axis direction side end portion of the substrate 20 and is formed as a recess recessed in the −X-axis direction side. In the present embodiment, two first position defining portions 32 are provided at intervals in the Y-axis direction. The second position defining portion 34 is provided at the −X-axis direction side end portion of the substrate 20 and is formed as a recess that is recessed toward the + X-axis direction side. In the present embodiment, two second position defining portions 34 are provided at intervals in the Y-axis direction.

<<< Connection terminal configuration >>>
Next, the connection terminal 26 will be described with reference to FIG. The connection terminal 26 includes an end portion 26a on one side, an end portion 26b on the other side, and a positioning portion 26c. In the present embodiment, the positioning portion 26c is disposed between the one end portion 26a and the other end portion 26b. More specifically, the positioning portion 26c is disposed closer to the one end portion 26a.

In the present embodiment, the dimensions in the X-axis direction and the Y-axis direction at the one end portion 26a and the other end portion 26b are set to dimensions that can pass through the first through hole 28. In the present embodiment, the connection terminal 26 is formed in a prismatic shape as an example, and the dimension in the X-axis direction and the Y-axis direction at the one end portion 26a and the other end portion 26b is set to d2.

In the present embodiment, the dimension d2 is set smaller than the diameter dimension d1 of the first through hole 28. In the present embodiment, the boundary between the positioning portion 26c, the one end portion 26a, and the other end portion 26b is configured to be a step. In the present embodiment, the stepped portion is in contact with the peripheral edge 28 a of the first through hole 28.

On the other hand, at least one dimension in the X-axis direction and the Y-axis direction of the positioning portion 26c is larger than the diameter dimension d1 of the first through hole 28, and is set so as not to pass through the first through hole 28. In the present embodiment, the dimension d3 in the X-axis direction of the positioning portion 26c is set larger than d1. Accordingly, the dimension d3 of the positioning portion 26c in the X-axis direction is larger than the dimension d2 of the one end portion 26a and the other end portion 26b.

In the present embodiment, a step portion 26d is formed at the boundary between the positioning portion 26c and the end portion 26a on one side. The step portion 26d has a surface extending in the X-axis direction. Similarly,
A step portion 26e is formed at the boundary between the positioning portion 26c and the other end portion 26b. The step portion 26e has a surface extending in the X-axis direction. In the present embodiment, the step portion 26 d contacts the peripheral edge portion 28 a of the first through hole 28.

In the present embodiment, for example, the positioning portion 26c can be formed by crushing a part of the connection terminal 26 between one end portion 26a and the other end portion 26b by pressing or the like. For example, when a part of the connection terminal 26 is crushed in the Y-axis direction in FIG. 6 to form the positioning part 26c, the dimension in the X-axis direction of the crushed part can be made larger than d2. Therefore, since the positioning part 26c can be easily formed in the connection terminal 26 by press working or the like, the component cost in the connection terminal 26 can be reduced.

In the present embodiment, the positioning portion 26c of the connection terminal 26 is formed by press working as an example. However, the present invention is not limited to this configuration. A cylindrical connection terminal having a diameter larger than that of the end portion on the side may be formed.

3 and 7, in this embodiment, one end portion 26 a of the connection terminal 26 is inserted into the first through hole 28 from the first surface 20 a side of the substrate 20. The connection terminal 26 inserted into the first through hole 28 is positioned in the Z-axis direction by the stepped portion 26d of the positioning portion 26c coming into contact with the peripheral portion 28a of the first through hole 28. In a state where the connection terminal 26 is positioned with respect to the substrate 20, the end portion 26 a on one side of the connection terminal 26 inserted into the first through hole 28 and the first through hole on the second surface 20 b side of the substrate 20. The lands formed on the peripheral edge portion 28a of the 28 are soldered, and the substrate 20 and the connection terminal 26 are connected. In FIG. 7, a soldered portion between the substrate 20 and the connection terminal 26 is denoted by reference numeral 36.

In a state where the connection terminal 26 is connected to the substrate 20, the motor terminal 18 g is passed through the second through hole 30 of the substrate 20 while the second surface 20 b side of the substrate 20 is directed to the outer peripheral surface side of the motor body 18. In this state, the peripheral portion 30a of the second through hole 30 and the motor terminal 18g are soldered from the first surface 20a side of the substrate 20 to connect the substrate 20 and the motor main body 18. The substrate 20 and the motor terminal 18g are connected at the soldering portion 38. In the present embodiment, as an example, the substrate 20 is fixed at a predetermined distance from the outer periphery of the motor main body 18, but instead of this configuration, the substrate 20 may be directly attached to the outer peripheral surface of the motor main body 18. Good.

In this embodiment, the motor terminal 18g is passed through the board 20 and connected to the board 20 on the first surface 20a side of the board 20, and the connection terminal 26 is passed through the board 20 and faces the motor body 18. The second surface 20b side of the substrate 20 is connected to the substrate 20. In other words, in the configuration of the present embodiment, after the operation of connecting the connection terminal 26 to the substrate 20 is performed, the motor terminal 18g is passed through the substrate 20 to which the connection terminal 26 is connected, and the side of the substrate 20 facing the motor body 18 is connected. Since the connection work of the board | substrate 20 and the motor terminal 18g can be performed by the 1st surface 20a on the opposite side, the attachment work of the board | substrate 20 with respect to the motor main body 18 can be made easy, and workability | operativity can be improved. it can.

<<< Mounting of motor to motor housing >>>
Referring to FIGS. 2, 8 and 9, the motor accommodating portion 12 d in this embodiment is an outer peripheral surface of the motor body 18, that is, a shape that accommodates the stator 18 b, for example, a circular concave portion that is recessed in the + X axis direction. Is formed. A fitting portion 12f penetrating the first case member 12 is formed at the bottom of the motor housing portion 12d.

In this embodiment, the bearing portion 18f of the motor body 18 is inserted into the fitting portion 12f as shown in FIGS. 9 and 13, and the fitting portion 12f and the bearing portion 18f are fitted. Thereby, the displacement of the motor body 18 in the radial direction of the bearing portion 18f is regulated by the fitting portion 12f, and the bearing portion 18f is positioned in the radial direction. That is, the motor body 18 is positioned with respect to the first case member 12 by fitting the bearing portion 18f and the fitting portion 12f.

<<< Attachment of Substrate to First Case Member and Second Case Member >>>
Next, the mounting structure and positioning of the board 20 with respect to the first case member 12 and the second case member 14 will be described with reference to FIGS.

As shown in FIG. 8, a part of the motor housing 12d in the circumferential direction is notched to form a notch 12g. A substrate holding part 12h is formed on the upper surface 12b of the first case member 12 on the + Z direction side of the notch part 12g. The substrate holding portion 12h is formed in a box shape that opens to the −X axis direction side. In the present embodiment, the substrate holding part 12h is configured to have a size capable of inserting and holding at least a part of the substrate 20 from the −X axis direction side as shown in FIG.

Referring to FIG. 10, the bottom portion 12j of the substrate holding portion 12h is provided with a convex first position defining portion 12k protruding from the bottom portion 12j in the −X axis direction. In the present embodiment, two first position defining portions 12k are provided at intervals in the Y-axis direction. In the present embodiment, the distance between the pair of first position defining portions 12k in the Y-axis direction is formed so as to correspond to the distance between the pair of first position defined portions 32 in the substrate 20 in the Y-axis direction. In the present embodiment, the first position defining portion 12k is defined to be at a predetermined position with respect to the upper surface 12b as the mounting surface of the second case member 14 in the X-axis direction.

Referring to FIGS. 11 and 12, the second case member 14 is formed with a connector connecting portion 14c communicating with the internal space 14b of the second case member 14. In the present embodiment, the connector connecting portion 14c extends in the + Z-axis direction from the internal space 14b and is opened at the end portion of the second case member 14 on the + Z-axis direction side. A guide groove 14d extending in the Z-axis direction is formed in the connector connecting portion 14c.

The guide groove 14d is configured to guide a connector (not shown) inserted into the connector connection portion 14c and connect the connector (not shown) and the other end portion 26b of the connection terminal 26 of the board 20. ing. The size of the opening of the connector connecting portion 14c is set to a size corresponding to the size of a connector (not shown) inserted into the connector connecting portion 14c. In the present embodiment, the other end 26 b of the connection terminal 26 is configured as a terminal that is electrically connected to the connector (not shown) when the connector (not shown) is attached to the substrate 20.

Referring to FIGS. 12 and 13, in the state where the second case member 14 is attached to the first case member 12, the motor housing portion of the first case member 12 is in the internal space 14 b of the second case member 14. The upper part of the motor main body 18 accommodated in 12d is accommodated. That is, the second case member 14 covers the upper portion of the motor main body 18 accommodated in the motor accommodating portion 12d.

As shown in FIG. 12, in the second case member 14, at least one contact portion 14f protruding in the + X direction side is formed at the −X axis direction side end portion 14e of the internal space 14b.
In the present embodiment, a plurality of contact portions 14f are provided at appropriate intervals on a concentric circle as an example.

As shown in FIG. 13, the contact portion 14 f comes into contact with the motor main body 18 in a state where the motor main body 18 is accommodated in the motor accommodating portion 12 d and the second case member 14 is attached to the first case member 12. It is configured. More specifically, as an example, the contact portion 14f is
In a state where the second case member 14 is attached to the first case member 12, the motor main body 18 is configured to be pressed toward the first case member 12.

As shown in FIG. 12, a convex second position defining portion 14g protruding in the + X-axis direction is provided between the internal space 14b and the connector connecting portion 14c in the Z-axis direction. As shown in FIG. 14, the second position defining portion 14 g is provided at two positions with a gap in the Y-axis direction. In the present embodiment, the distance between the pair of second position defining portions 14g in the Y axis direction is formed to correspond to the distance between the pair of second position defined portions 34 in the substrate 20 in the Y axis direction. In the present embodiment, the position of the second position defining portion 14g with respect to the connector connecting portion 14c is defined in the Y-axis direction.

As shown in FIGS. 14 and 15, in the state where the motor main body 18 is accommodated in the motor accommodating portion 12 d and the second case member 14 is attached to the first case member 12, the substrate 20 is attached to the first case member 12. The end of the substrate 20 on the −X direction side is covered with the second case member 14 and inserted into the substrate holding portion 12h.

In the present embodiment, the concave first position defining portion 32 of the substrate 20 inserted into the substrate holding portion 12h is engaged with the convex first position defining portion 12k provided in the substrate holding portion 12h. ing. Specifically, as shown in FIG. 15B, the −X direction side end as the “board side end” of the first position defining portion 12k and the −X direction end of the first position defining portion 32 The part is engaged. In the present embodiment, the length L1 of the first position defining portion 12k in the X axis direction is set to be longer than the length L2 of the first position defined portion 32 in the X axis direction. The width W2 of the first position defining portion 12k in the Y axis direction is set to be narrower than the width W3 of the first position defining portion 32 in the Y axis direction.

In the present embodiment, since the contact portion 14f (FIG. 13) presses the motor body 18 toward the first case member 12, the substrate 20 is also pressed toward the first case member 12. Thus, when the first position defining portion 12k and the first position defined portion 32 are engaged, the + X-axis direction side end portion of the substrate 20 and the bottom portion 12j of the substrate holding portion 12h do not contact each other, and the X-axis direction The first position defining portion 12k and the first position defined portion 32 are in contact with each other only at the end on the −X axis direction side. In the Y-axis direction, the first position defining portion 12k and the first position-defining portion 32 are positioned in the Y-axis direction by positioning a second position defining portion 14g and a second position-defining portion 34, which will be described later, in the Y-axis direction. It is the structure which does not contact in a direction.

In the present embodiment, since the first position defining portion 32 of the substrate 20 is pressed toward the first position defining portion 12k by the contact portion 14f, the positioning of the substrate 20 with respect to the first case member 12 in the X-axis direction is performed. And the position in the X-axis direction can be defined. In addition, in the present embodiment, the positions of the upper surface 12b of the first case member 12 and the first position defining portion 12k in the X-axis direction are defined, so that the second case member 14 is attached to the upper surface 12b. The positions of the substrate 20 and the connector connecting portion 14c of the second case member 14 in the X-axis direction are defined.

Furthermore, in the present embodiment, since the first position defining portion 32 of the substrate 20 is pressed against the first position defining portion 12k by the contact portion 14f, even if vibration or impact is applied to the motor unit 10, It is suppressed that the substrate 20 is displaced in the −X direction side against the pressing force of the contact portion 14f. Thereby, the position in the X-axis direction of the board | substrate 20 with respect to the 1st case member 12 can be kept more stably.

On the other hand, in the present embodiment, the concave second position defining portion 34 of the substrate 20 inserted into the substrate holding portion 12h is related to the convex second position defining portion 14g provided on the second case member 14. Match. Specifically, as shown in FIG. 15 (A), both end portions in the Y-axis direction of the second position defining portion 14g engage with both end portions in the Y-axis direction of the second position defining portion 34. Yes.

In the present embodiment, the second position defining portion 14g has a width W4 in the Y-axis direction that is equal to the width W5 of the second position defined portion 34 in the Y-axis direction. The dimension is set so that it can be press-fitted into the portion 34. That is, the second position defining portion 14 g is press-fitted into the second position defined portion 34 in an engaged state with the second position defined portion 34. In the present embodiment, when the second position defining portion 14g and the second position defined portion 34 are engaged, the + X-axis direction end of the second position defining portion 14g and the second position defined portion 34 are It is configured not to contact the + X-axis direction side end.

In the present embodiment, since the second position defining portion 14g is press-fitted into the second position defined portion 34, the substrate 20 is positioned with respect to the second case member 14 in the Y-axis direction to ensure the position in the Y-axis direction. Can be specified. Thereby, the position in the Y-axis direction of the board | substrate 20 and the connector connection part 14c of the 2nd case member 14 is prescribed | regulated.

As a result, the connector connecting portion 14c and the board 20, and thus the connection terminal 26 are positioned in the X-axis direction and the Y-axis direction, and the position is defined. Therefore, the connector connecting portion 14c is connected to a connector (not shown) inserted into the connector connecting portion 14c. Connection with the terminal 26 can be facilitated.

In the present embodiment, the position of the substrate 20 in the X-axis direction with respect to the first case member 12 and the second case member 14 is obtained by engaging the concave first position defining portion 32 with the convex first position defining portion 12k. The concave second position defining portion 34g is engaged with the convex second position defining portion 14g, and the position of the substrate 20 in the Y-axis direction with respect to the first case member 12 and the second case member 14 is determined. Stipulated. Thereby, positioning of the board | substrate 20 can be positioned by engaging an unevenness | corrugation, and the structure of positioning can be simplified.

In the present embodiment, the position of the substrate 20 in the X-axis direction relative to the first case member 12 and the second case member 14 can be defined by the first position defining portion 12k, and the first case member can be defined by the second position defining portion 14g. 12 and the position of the substrate 20 in the Y-axis direction with respect to the second case member 14 can be defined.

<<< Modified form of the embodiment >>>
(1) In this embodiment, the concave first position defining portion 32 is engaged with the convex first position defining portion 12k, and the X axis of the substrate 20 with respect to the first case member 12 and the second case member 14 is engaged. The position in the direction is defined, the concave second position defining portion 34 is engaged with the convex second position defining portion 14g, and the Y-axis direction of the substrate 20 with respect to the first case member 12 and the second case member 14 However, instead of this configuration, the first case member 12 and the second case 12 are formed by engaging the concave first position defining portion 32 with the convex first position defining portion 12k. The position of the substrate 20 with respect to the member 14 in the Y-axis direction is defined, and the concave second position defining portion 34 is engaged with the convex second position defining portion 14g, so that the first case member 12 and the second case member 14 in the X-axis direction of the substrate 20 It may be configured to define a.

(2) In this embodiment, the latching portion 12e for attaching the second case member 14 to the first case member 12 is provided on the outer peripheral surface of the motor housing portion 12d. In addition to this configuration, FIG. As shown, the latching portions 40a are provided at positions on both sides in the Y-axis direction of the substrate 20 (see the broken line portion) held by the substrate holding portion of the first case member 40, and the latched portions 42a of the second case member 42 are provided. It is good also as a structure made to latch.

With this configuration, for example, even when vibration or impact is applied to the motor unit 10, the first case member 40 and the second case member 42 are hooked at positions corresponding to the substrate 20. The second case member 42 can be prevented from floating from the first case member 40, and the substrate 20 can be prevented from falling off the substrate holding portion, and the position of the substrate 20 in the X-axis direction can be prevented from shifting.

(3) In this embodiment, although the positioning shape of the board | substrate 20 was made into the uneven | corrugated shape, it may replace with this structure and may change suitably the positioning shape, such as square shape.

(4) In the present embodiment, the first position defining portion 32 is provided at the + X axis direction end of the substrate 20 and the second position defining portion 34 is provided at the −X axis direction end. A first position defining portion 32 and a second position defining portion 34 may be provided at the + Y axis direction side end and the −Y axis direction side end of the substrate 20. For example, the first position defining portion 32 is provided on the + X axis direction side at the end of the substrate 20 on the + Y axis direction side, the second position defining portion 34 is provided on the −X axis direction side, and the −Y axis direction of the substrate 20 is The first position defining portion 32 may be provided on the + X axis direction side in the side end portion, and the second position defining portion 34 may be provided on the −X axis direction side.

(5) In the present embodiment, the step portion 26d of the connection terminal 26 is in contact with the peripheral edge portion 28a of the first through hole 28. However, the end portion on the other side of the connection terminal 26 from the second surface 20b side of the substrate 20 is used. 26b may be inserted into the first through hole 28, and the stepped portion 26e may be in contact with the peripheral portion 28a of the first through hole 28 on the second surface 20b side.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

10 motor unit, 12, 40 first case member, 12a, 14a, 42a hooked part, 12b upper surface, 12c opening, 12d motor housing part, 12e, 16a, 40a hooking part, 12f fitting part, 12g cutting Notch part, 12h board holding part, 12j bottom part, 12k first position defining part, 14, 42 second case member, 14b internal space, 14c connector connecting part, 14d guide groove, 14e X-axis direction side end part, 14f pressing part , 14g second position defining part, 16 third case member, 18 motor body, 18a drive shaft, 18b stator, 18c rotor, 18d permanent magnet, 18e drive coil, 18f bearing part, 18g motor terminal, 20 substrate, 20a first Surface, 20b second surface, 22 driving force output unit, 24 pinion gear, 2 Connection terminal, 26a, one end, 26b, the other end, 26c, positioning portion, 26d, 26e, stepped portion, 28, first through hole, 28a, 30a peripheral portion, 30, second through hole, 32, first position Definition part, 34 Second position definition part, 36, 38 Soldering part, L1, L2 length, W1 region, W2, W3, W4, W5 width, d1 diameter dimension, d2, d3 dimension

Claims

A motor body;
A substrate attached to the outer periphery of the motor body;
A first case member for housing the motor body and the substrate;
A second case member attached to the first case member and covering the motor body and the substrate;
With
The substrate is
Engaging the first case member and the second case member,
In a state of being engaged with the first case member, a position in one of the first direction along the axis of the drive shaft of the motor body and the second direction that intersects the first direction is defined. 1 position definition part;
A second position defining portion in which a position in either one of the first direction and the second direction is defined in a state of being engaged with the second case member;
A motor unit comprising:
2. The motor unit according to claim 1, wherein in the substrate, the first position defining portion is formed as a concave portion that is recessed toward the other end portion at one end portion in the first direction,
The second position defining portion is formed as a recess that is recessed toward the one end at the other end.
The first case member is formed with a convex first position defining portion that protrudes toward the first position defined portion of the substrate and engages with the first position defined portion,
The second case member is formed with a convex second position defining portion that protrudes toward the second position defined portion of the substrate and engages with the second position defined portion. Motor unit.
The motor unit according to claim 2, wherein the first position defining portion defines a position in the first direction with respect to the substrate.
The second position defining unit defines a position in the second direction with respect to the substrate.
The motor unit according to claim 2 or 3, wherein the motor body is provided with a bearing portion that rotatably supports the drive shaft,
The first case member is formed with a fitting portion that fits with the bearing portion of the motor body.
In the state where the fitting portion and the bearing portion are fitted, the fitting portion defines a radial position of the motor body.
5. The motor unit according to claim 4, wherein the second case member is formed with a contact portion that contacts the motor main body in a state where the bearing portion of the motor main body is fitted to the fitting portion.
The motor unit, wherein the contact portion is in contact with the motor body, whereby the first position defining portion and the first position defining portion of the substrate are in contact with each other.
6. The motor unit according to claim 2, wherein the second position defining portion is in contact with the second position defining portion at at least one end in the second direction. Features motor unit.
6. The motor unit according to claim 2, wherein the first position defining portion of the substrate is an end portion on the substrate side of the first position defining portion in the first direction. 7. The position of the substrate in the first direction is defined,
The position of the substrate in the second direction is defined by the second position defining portion of the substrate being in contact with both end portions of the second position defining portion in the second direction. Motor unit.
The motor unit according to any one of claims 2 to 7, wherein the second case member extends along a third direction that is a direction intersecting the first direction and the second direction, The board is disposed on one side in the third direction, and has a connector connection part that is open on the other side,
The connector connecting portion is defined with respect to the second position defining portion in the second direction,
The motor unit, wherein at least one connection terminal extending from the substrate toward the other side in the third direction and accommodated in the connector connection portion is connected to the substrate.
The motor unit according to claim 8, wherein the first case member is provided with an attachment surface for attaching the second case member.
The mounting surface is defined with respect to the first position defining portion in the first direction,
In the state where the second case member is attached to the mounting surface, the position of the connector connecting portion and the first position defining portion in the first direction is defined.
The motor unit according to claim 8 or 9, wherein at least one through hole is formed in the substrate.
The connecting terminal has a diameter dimension of the through hole in at least one of the first direction and the second direction between the end on one side and the end on the other side in the third direction. Having a positioning part having a large dimension;
When the connection terminal is passed through the through hole, the connection portion is positioned with respect to the substrate in the third direction by the positioning portion being in contact with a peripheral portion of the through hole. Motor unit.
The motor unit according to any one of claims 8 to 10, wherein the motor main body has a motor terminal extending from the motor main body toward the other side in the third direction,
The motor terminal is passed through the substrate and connected to the substrate on the other side surface of the substrate;
The motor unit, wherein the connection terminal is connected to the substrate through a surface of one side of the substrate that is passed through the substrate and faces the motor body.