Drive device

Abstract

To provide a drive device capable of properly connecting a motor wire to a substrate.SOLUTION: A drive device 1 includes a motor 10, a substrate 31, and an electromechanical connection member 41. The motor 10 has: a motor case 11; a stator 15 fixed to the motor case 11; a motor winding 18 wound around the stator 15; and a rotor 16 provided to be relatively rotatable with the stator 15 when current is applied to the motor winding 18. The substrate 31 has electronic components mounted thereon, the electronic components being provided on one axial side of the motor 10 and being related to drive control of the motor 10. The electromechanical connection member 41 has substrate connection terminals 45 to be connected to the substrate 31, and connects the substrate 31 to the motor winding 18. One end side of the substrate connection terminal 45 is connected to the substrate 31 via elastic contact, and the other end side thereof is connected to the motor winding 18 in a form adjustable in an axial direction so that connection positions with the substrate 31 in a motor axial direction are within a predetermined range.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a drive device. [Background technology]

[0002] Conventionally, there has been known a drive device including a rotating electric machine and a controller that drives and controls the rotating electric machine. For example, in Patent Document 1, a motor wire is press-fit connected to a substrate via a motor wire connection terminal. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-36243 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of press-fit connection, the tolerance for positional variation in the height direction is small, and if there is variation in the stator height, for example, there is a risk that proper connection will not be possible.

[0005] The present invention has been made in view of the above-mentioned problems, and has an object to provide a drive device that can appropriately connect a motor wire and a circuit board. [Means for solving the problem]

[0006] The drive device of the present invention includes a motor (10), a substrate (31), and electromechanical connection members (41, 410). The motor has a motor case (11), a stator (15) fixed to the motor case, motor windings (18) wound around the stator, a rotor (16) that is rotatable relative to the stator when current is applied to the motor windings, and a shaft (17) that is rotatably supported by the motor case and rotates integrally with the rotor.

[0007] The circuit board is provided on one axial side of the motor and is equipped with electronic components related to motor drive control. The electromechanical connection member has circuit board connection terminals (45-48) that are connected to the circuit board and connect the circuit board to the motor windings. One end of the circuit board connection terminal is connected to the circuit board by elastic contact, and the other end is connected to the motor windings in a manner that allows the axial position of the circuit board connection terminal to be adjusted so that the connection position with the circuit board in the motor axial direction is within a predetermined range. This reduces variation in the connection position between the circuit board and the circuit board connection terminal in the motor axial direction, allowing for appropriate connection between the motor windings and the circuit board. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic configuration diagram of a steering system according to a first embodiment. [Figure 2] 1 is a cross-sectional view of a drive device according to a first embodiment. [Figure 3] FIG. 2 is a side view of the drive device according to the first embodiment. [Figure 4] FIG. 2 is a plan view showing a board connection terminal and a contact connection portion according to the first embodiment. [Figure 5] FIG. 2 is a perspective view showing a board connection terminal and a contact connection portion according to the first embodiment. [Figure 6] 3A and 3B are schematic diagrams showing the connection state of the board connection terminal and the contact connection portion according to the first embodiment. [Figure 7] 3A and 3B are schematic diagrams showing the connection state of the board connection terminal and the contact connection portion according to the first embodiment. [Figure 8] 3 is a cross-sectional view showing a state before the board connection terminal and the board are assembled in the first embodiment. FIG. [Figure 9] 3 is a cross-sectional view showing a state in which the board connection terminal and the board are assembled in the first embodiment. FIG. [Figure 10] 10A and 10B are schematic diagrams showing a board connection terminal according to a second embodiment. [Figure 11] 10A and 10B are schematic diagrams showing a board connection terminal according to a third embodiment. [Figure 12] FIG. 10 is a cross-sectional view showing a drive device according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A driving device according to the present invention will be described below with reference to the accompanying drawings. In the following, substantially identical components in a plurality of embodiments will be designated by the same reference numerals, and the description thereof will be omitted.

[0010] (First embodiment) The first embodiment is shown in Figures 1 to 9. As shown in Figure 1, a drive device 1 includes a motor 10 and an ECU 30, and is applied to an electric power steering device 8. Figure 1 shows the configuration of a steering system 90 that includes the electric power steering device 8. The steering system 90 includes a steering wheel 91, which is a steering member, a steering shaft 92, a pinion gear 96, a rack shaft 97, wheels 98, the electric power steering device 8, and the like.

[0011] The steering wheel 91 is connected to a steering shaft 92. A torque sensor 94 that detects steering torque is provided on the steering shaft 92. A pinion gear 96 is provided at the tip of the steering shaft 92. The pinion gear 96 meshes with a rack shaft 97. A pair of wheels 98 are connected to both ends of the rack shaft 97 via tie rods or the like.

[0012] When the driver turns the steering wheel 91, the steering shaft 92 connected to the steering wheel 91 rotates. The rotational motion of the steering shaft 92 is converted into linear motion of a rack shaft 97 by a pinion gear 96. A pair of wheels 98 is steered to an angle corresponding to the amount of displacement of the rack shaft 97.

[0013] The electric power steering device 8 includes a drive unit 1 and a reduction gear 89, which is a power transmission unit that reduces the speed of rotation of the motor 10 and transmits the reduced speed to the steering shaft 92. In other words, the electric power steering device 8 of this embodiment is a so-called "column assist type," and the steering shaft 92 can be said to be the driven object. It may also be a so-called "rack assist type," in which the rotation of the motor 10 is transmitted to a rack shaft 97.

[0014] The motor 10 is, for example, a three-phase brushless motor. The motor 10 outputs part or all of the torque required for steering, is driven by power supplied from a battery (not shown), and rotates the reduction gear 89 forward and reverse. The drive unit 1 is a so-called "mechatronically integrated" drive unit, with the ECU 30 provided on one axial side of the motor 10. The mechatronically integrated drive unit 1 allows the motor 10 and ECU 30 to be efficiently arranged in a vehicle with limited installation space. Hereinafter, when simply referring to the "axial direction" and "radial direction," it will refer to the axial direction and radial direction of the motor 10.

[0015] As shown in Figures 2 and 3, motor 10 includes a motor case 11, a stator 15, and motor windings 18. Note that Figure 2 shows a cross section slightly offset from the center to facilitate explanation of electromechanical connection members 41, which will be described later. Figure 3 is a view from direction III in Figure 2, with the substrate 31 omitted.

[0016] The motor case 11 has a case body 12 and a frame member 13. The case body 12 is formed of a metal such as an aluminum alloy, and is provided in a generally cylindrical shape with a bottom that opens to the board 31 side. The frame member 13 is provided on the opening side of the case body 12, and is shrink-fitted to the radially inner side of the cylindrical portion of the case body 12. The frame member 13 is formed with a hole 131 through which a board connection terminal 45 (described later) is inserted. A step 132 is formed in the hole 131 (see FIGS. 8 and 9).

[0017] The stator 15 is made of laminated steel plates or the like, and is fixed to the radially inner side of the cylindrical portion of the case body 12. A rotor 16 is provided radially inside the stator 15 so as to be rotatable relative to the stator 15. A shaft 17 is press-fitted into the rotor 16, and the shaft 17 is rotatably supported by the motor case 11. A motor winding 18 is wound around the stator 15. When current is applied to the motor winding 18, the rotor 16 and the shaft 17 rotate together. An end of the motor winding 18 extends to the frame member 13 side.

[0018] The ECU 30 has a circuit board 31 and is housed inside a cover (not shown). Various electronic components related to the drive control of the motor 10 are mounted on the circuit board 31. The motor windings 18 and the circuit board 31 are connected by an electromechanical connecting member 41.

[0019] 2 and 9, the electromechanical connection member 41 has a winding connection member 42 and a board connection terminal 45. The winding connection member 42 and the board connection terminal 45 are formed into a plate shape from, for example, a copper alloy, and are so-called bus bars.

[0020] The winding connection member 42 has a lead-out wire connection portion 421, a base portion 422, and a contact connection portion 423, and is formed integrally by bending or folding a plate-like member. The motor winding 18 of this embodiment is made up of two sets of three-phase windings, and six winding connection members 42 are provided. The six winding connection members 42 form a ring shape as a whole.

[0021] The output wire connection portion 421 is connected to an end of the motor winding 18 taken out from each throttle of the stator 15. The base portion 422 is held by an annular holder 43. The output wire connection portion 421 and a contact connection portion 423 are provided on the side of the base portion 422 opposite the motor 10. The contact connection portion 423 protrudes from the base portion 422 on the side opposite the motor 10, and is formed by bending the tip side so that it extends radially outward. An insertion portion 425 (see FIG. 4, etc.) is formed in the contact connection portion 423.

[0022] The three contact-connection parts 423 corresponding to each phase of the same winding set are arranged side by side in the circumferential direction. The three contact-connection parts 423 corresponding to one winding set are arranged symmetrically on both sides of the axis with the three contact-connection parts 423 corresponding to the other winding set. It is desirable to arrange the contact-connection parts 423 as far outward in the radial direction as possible.

[0023] 4 and 5, contact connection portion 423 has a generally U-shaped insertion portion 425 that opens toward substrate 31. Contact connection portion 423 can also be considered to have a tuning fork terminal shape. Insertion portion 425 has a clamping portion 426 that is narrower than the plate thickness of board connection terminal 45. Tip portion 455 of board connection terminal 45 is inserted into contact connection portion 423 and clamped by clamping portion 426, thereby electrically connecting board connection terminal 45 and winding connection member 42.

[0024] 2 and 9, the surface of contact connection portion 423 facing the motor 10 abuts against load-receiving portion 435 of annular holder 43. This allows annular holder 43 to bear the insertion load of board connection terminal 45, and prevents excessive insertion stress from being applied to winding connection member 42.

[0025] The annular holder 43 has a holding portion 431, legs 432, and a load receiving portion 435, and is integrally formed from resin or the like. The holding portion 431 holds the base portion 422 of the winding connection member 42 in an insulated state. The legs 432 are provided so as to straddle the motor windings 18, and are fixed at their tip ends to the stator 15. The legs 432 are provided at multiple locations. The load receiving portions 435 are provided at two locations where the contact connection portions 423 are arranged, protruding toward the side opposite the motor 10.

[0026] As shown in FIGS. 2 to 9, the board connection terminals 45 are formed in a flat plate shape and are held by a terminal holder 51. In this embodiment, the board connection terminals 45 are formed by punching out a metal plate and are used in a straight state without undergoing any bending process or the like. The board connection terminals 45 are insert-molded into the terminal holder 51. The terminal holder 51 is provided with a flange 511 that abuts against the stepped portion 132. As a result, the flange 511 of the terminal holder 51 abuts against the stepped portion 132 of the frame member 13, thereby positioning the board connection terminals 45 in the axial direction.

[0027] 4 to 6, the board connection terminal 45 has an elastic connection portion 451 formed on one end side. The elastic connection portion 451 is formed in an elastically deformable shape, and is inserted into a terminal connection hole formed in the board 31 to be electrically connected to the board 31 by a so-called press-fit connection. In this embodiment, the elastic connection portion 451 is formed in an annular shape, but the shape may be different as long as elastic connection is possible.

[0028] Each board connection terminal 45 has a plurality of (two in this embodiment) branched elastic connection portions 451. This makes it possible to prevent the board connection terminals 45 from shifting in position or orientation.

[0029] The other end of the board connection terminal 45, that is, the tip portion 455, is inserted into the insertion portion 425 of the contact connection portion 423, thereby being electrically connected to the winding connection member 42. As a result, the motor winding 18 is electrically connected to the board 31 via the winding connection member 42 and the board connection terminal 45.

[0030] For reference, if the connection between the circuit board 31 and the motor wires is performed by soldering, the cycle time is long and large-scale equipment is required. In this embodiment, the connection between the circuit board 31 and the motor wires is performed by press-fit connection, so that the electrical connection is completed at the same time as assembly.

[0031] In the case of press-fit connection, assembly with relatively high accuracy in the axial direction is required so that the elastically deformable portion of board connection terminal 45 is located within the thickness of board 31. On the other hand, stator 15 is made of multiple laminated steel plates, and the axial length varies considerably. As a result, the axial positions of the ends of motor windings 18 wound around stator 15 vary.

[0032] Therefore, in this embodiment, the insertion depth of the board connection terminals 45 into the insertion portions 425 is adjusted at the connection points between the contact connection portions 423 and the board connection terminals 45, thereby absorbing variations in the axial length of the stator 15. Specifically, the thickness direction of the board connection terminals 45 is oriented substantially perpendicular to the contact connection portions 423, and the board connection terminals 45 are inserted into the insertion portions 425 while the clamping portions 426 are expanded by the thickness of the board connection terminals 45. The clamping portions 426 come into contact with the winding connection members 42, thereby electrically connecting the winding connection members 42 and the board connection terminals 45. Furthermore, the board connection terminals 45 are clamped by the clamping portions 426 at an insertion depth at which the terminal holder 51 abuts against the stepped portions 132 of the frame member 13, thereby defining the connection position in the axial direction. The tip portions 455 are spaced from the innermost portions of the insertion portions 425, and the connection position in the axial direction can be adjusted by changing the insertion depth.

[0033] 6(a) and 6(b) are schematic diagrams showing the connection between the contact connection portion 423 and the board connection terminal 45 of this embodiment, with FIG. 6(b) being a view from the VIB direction of FIG. 6(a). In this embodiment, the contact connection portion 423 is female and the board connection terminal 45 is male. Because it is difficult to increase the number of contact points at the connection portion between the winding connection member 42 and the board connection terminal 45 by male-female fitting, it is preferable to use a material with good conductivity for the winding connection member 42. Furthermore, because it is easy to increase the number of contact points at the connection portion between the board connection terminal 45 and the board 31 by elastic contact, it is preferable to use a material with good spring properties for the board connection terminal 45.

[0034] 7(a) and 7(b), the contact connection portion 423 may be male and the board connection terminal 45 may be female. In this case, it is preferable to use a material for the board connection terminal 45 in consideration of conductivity and spring properties. Note that FIG. 7(b) is a view seen from the direction VIIB of FIG. 7(a).

[0035] The assembly of the motor 10 and the circuit board 31 will be described with reference to Figures 8 and 9. Figure 9 shows the assembled state corresponding to Figure 2, and for simplicity, Figures 8 and 9 illustrate the assembled state on the left side of the page, while omitting details of the connection configuration, rotor 16, shaft 17, etc. on the right side of the page. Furthermore, although the connection points between the motor windings 18 and the winding connecting members 42 are located in a radially outer region and are shifted in the circumferential direction from the connection points between the winding connecting members 42 and the circuit board connecting terminals 45, for simplicity, they are shown as being radially inner.

[0036] With the stator 15 and frame member 13 assembled to the motor case 11 by shrink fitting or the like, the board connection terminals 45 insert-molded into the terminal holder 51 are inserted into the holes 131 of the frame member 13. The tip ends 455 of the board connection terminals 45 are clamped by the clamping portions 426 and connected to the winding connection members 42. Furthermore, the flange portions 511 of the terminal holder 51 come into contact with the stepped portions 132 of the frame member 13, thereby determining the axial position.

[0037] In this embodiment, the insertion portion 425 is formed so that the clamping portion 426 can clamp the board connection terminal 45 regardless of the allowable stator length variation, in accordance with the variation in the axial length of the stator 15. The contact connection portion 423 is formed in a tuning fork terminal shape, and the clamping position of the board connection terminal 45 in the axial direction is variable, thereby accommodating the variation in the axial length of the stator 15. This suppresses variation in the axial position of the elastic connection portion 451 of the board connection terminal 45, allowing for appropriate connection to the board 31 by press-fit connection. In this embodiment, the board 31 is held by press-fit connection with the board connection terminal 45, and abuts against the frame member 13 at the board abutment portion 135.

[0038] When connecting the board connection terminals 45 and the winding connection members 42, no jig is required, unlike when connecting by soldering, for example. Therefore, the board connection terminals 45 and the winding connection members 42 can be connected after the frame member 13 is assembled to the motor case 11.

[0039] As described above, the drive device 1 includes the motor 10, the substrate 31, and the electromechanical connection member 41. The motor 10 includes a motor case 11, a stator 15 fixed to the motor case 11, motor windings 18 wound around the stator 15, a rotor 16 that is rotatable relative to the stator 15 when current is applied to the motor windings 18, and a shaft 17 that is rotatably supported by the motor case 11 and rotates integrally with the rotor 16.

[0040] The board 31 is provided on one axial side of the motor 10, and is equipped with electronic components related to drive control of the motor 10. The electromechanical connection member 41 has board connection terminals 45 that are connected to the board 31, and connects the board 31 to the motor windings 18. In this embodiment, the electromechanical connection member 41 has winding connection members 42 that connect the motor windings 18 for each phase inside the motor case 11, and the other end of the board connection terminals 45 is connected to the winding connection members 42.

[0041] One end of the board connection terminal 45 is connected to the board 31 by elastic contact, and the other end is connected to the motor windings 18 in a manner that allows the axial position of the connection position with the board 31 in the motor axial direction to be adjusted within a predetermined range. In other words, the winding connection member 42 and the board connection terminal 45 are configured so that the connection position can be adjusted during assembly depending on the axial position of the winding connection member 42.

[0042] In this embodiment, the other end of the board connection terminal 45 is connected to the motor winding 18 via the winding connection member 42. Here, "the connection position with the board in the motor axial direction is within a predetermined range" specifically means a range in which the board 31 and the board connection terminal 45 satisfy the conductive function through elastic contact.

[0043] As a result, even if the axial position of the winding connection member 42 is shifted due to, for example, lamination variations in the stator 15, by adjusting and assembling the connection position between the winding connection member 42 and the board connection terminal 45, it is possible to suppress variations in the connection position between the board 31 and the board connection terminal 45, and the board 31 and the board connection terminal 45 can be properly connected through elastic contact.

[0044] One of the winding connection member 42 or the board connection terminal 45 is provided with an insertion portion 425 extending in the motor axial direction. The other of the winding connection member 42 or the board connection terminal 45 is inserted into the insertion portion 425 and is clamped by the clamping portion 426 at a position corresponding to the insertion depth, thereby achieving electrical connection. This makes it possible to absorb, for example, variations in lamination of the stator 15 and connect the board connection terminal 45 and the board 31 within a predetermined range. Furthermore, because the winding connection member 42 and the board connection terminal 45 are electrically connected by assembling them, a blind connection can be achieved, for example, inside the motor case 11.

[0045] In this embodiment, the insertion portion 425 is provided in the winding connecting member 42. This allows the winding connecting member 42 to be made of a material with good conductivity, and the board connecting terminal 45 to be made of a material that emphasizes spring properties.

[0046] The winding connection member 42 is held by an annular holder 43, and has a contact connection portion 423 that protrudes from the annular holder 43 toward the board 31. The contact connection portion 423 abuts against the annular holder 43 on the surface opposite to the board 31. This allows the annular holder 43 to bear the load when the winding connection member 42 and the board connection terminal 45 are assembled.

[0047] The drive unit 1 includes a terminal holder 51 that holds the board connection terminals 45. The terminal holder 51 is inserted into a hole 131 provided in a frame member 13 of the motor case 11 from the board 31 side, and abuts against the frame member 13 on its axial surface. In this embodiment, a flange 511 of the terminal holder 51 abuts against a step 132 of the frame member 13. In other words, the terminal holder 51 is seated on the frame member 13. This allows the axial position of the board connection terminals 45 to be determined. Furthermore, the terminal holder 51 can bear the load of the press-fit connection between the board connection terminals 45 and the board 31.

[0048] The board connection terminals 45 are insert-molded into the terminal holder 51. This prevents the board connection terminals 45 from being misaligned in the axial direction during assembly, etc. The connection points on the other ends of the board connection terminals 45 are within a projection area of the terminal holder 51 projected in the motor axial direction. This allows the opening of the motor case 11 (frame member 13 in this embodiment) to be relatively small.

[0049] (Second embodiment) The second embodiment is shown in Figure 10. The second and third embodiments differ from the above embodiments in the shape of the board connection terminal, and this point will be mainly described. In this embodiment, board connection terminal 46 is provided with insertion positioning portion 461 on the outer periphery of elastic connection portion 451. When elastic connection portion 451 is electrically connected to board 31, insertion positioning portion 461 abuts against the surface of board 31 facing motor 10.

[0050] In this embodiment, the board connection terminals 46 are connected to the board 31, and then the board connection terminals 46 are connected to the winding connecting member 42. In this case, by providing the board connection terminals 46 with insertion positioning portions 461, it is possible to prevent the connection between the board 31 and the board connection terminals 46 from being disconnected by re-pushing when inserting the tip portions 455 of the board connection terminals 46 into the contact connection portions 423 after the board connection terminals 46 have been assembled to the board 31. The number, shape, position, etc. of the insertion positioning portions 461 may be different from those shown in FIG. 10 as long as they are able to prevent re-pushing.

[0051] Furthermore, when assembling is performed in the order of inserting the board 31 side into the contact connection part 423 after first assembling the board 31 side, and when the insertion positioning part 461 is not provided, the configuration is such that formula (1) holds. In the formula, Lp is the re-press load of the press-fit part, Lm is the connection load on the motor side, and n is the number of branches of the elastic connection part 451.

[0052] Lp×n>Lm (1)

[0053] It is also possible to prevent the press-fit portion from being pressed in again by providing a plurality of elastic connection portions 451 in one board connection terminal 45 and increasing the number of connection points. This configuration also achieves the same effects as the above embodiment.

[0054] (Third embodiment) The third embodiment is shown in Fig. 11. The board connection terminal 47 is provided with a shoulder 471 and is fixed to the terminal holder 51 by an outsert. The shoulder 471 is formed to protrude from the terminal holder 51 toward the board 31. When assembling the board connection terminal 47 with the winding connection member 42, by applying force to the shoulder 471 and inserting it into the insertion portion 425, the board connection terminal 47 can be prevented from coming off the terminal holder 51 during assembly. This embodiment also provides the same effects as the above-mentioned embodiments.

[0055] (Fourth embodiment) The fourth embodiment is shown in Fig. 12. Fig. 12 corresponds to Fig. 9, and some components are omitted. The electromechanical connection member 410 has a winding connection member 420, an intermediate connection member 44, and a board connection terminal 48. The winding connection member 420 is generally similar to the winding connection member 42 of the above embodiment, except that it is connected to the intermediate connection member 44 instead of the board connection terminal. The winding connection member 420 and the intermediate connection member 44 can be connected by any method as long as they are electrically connected.

[0056] The intermediate connection member 44 is a flat plate-shaped member formed to extend in the axial direction, with one side held by the terminal holder 52 and the other side connected to the winding connection member 42. The winding connection member 42 and the intermediate connection member 44 can be connected in any manner as long as they are electrically connected.

[0057] The board connection terminal 48 is formed with an elastic connection portion 451 that is press-fit connected to the board 31, and is generally similar to the board connection terminal of the above embodiment except that it has a relatively short axial length. The board connection terminal 48 may be provided with an insertion positioning portion 461 and a shoulder portion 471.

[0058] Intermediate connection member 44 is formed with insertion portions 425 (see FIG. 5, not shown in FIG. 12), and the tip sides of board connection terminals 48 are inserted into insertion portions 425 and come into contact with each other at the clamping portions, thereby electrically connecting intermediate connection member 44 and board connection terminals 48. Note that an insertion portion may be formed on the board connection terminal 48 side, and the intermediate connection member 44 may be inserted into the insertion portion to provide electrical connection. That is, in this embodiment, the connection between intermediate connection member 44 and board connection terminals 48 is the same as the connection between winding connection member 42 and board connection terminals 45 in the first embodiment, and is connected in a manner that allows the axial position to be adjusted so that the connection position on the board 31 side is within a predetermined range.

[0059] If the intermediate connection member 44 is not provided and the board connection terminals 45, which are relatively long in the axial direction, are connected to the winding connection members 42, a blind connection will be made inside the frame member 13. In this embodiment, by providing the intermediate connection member 44, terminal connection by fitting the intermediate connection member 44 and the board connection terminals 48 together can be made outside the motor case 11.

[0060] In this embodiment, the electromechanical connection member 410 includes winding connection members 420 that connect the motor windings 18 for each phase inside the motor case 11, and intermediate connection members 44 that connect the winding connection members 420 to the board connection terminals 48. The intermediate connection members 44 and the board connection terminals 48 are connected outside the motor case 11. This reduces the difficulty of assembly.

[0061] In the embodiment, the winding connecting member 42 and the intermediate connecting member 44 correspond to the "other end connecting member", the contact connecting portion 423 corresponds to the "terminal connecting portion", and the annular holder 43 corresponds to the "holder member".

[0062] (Other embodiments) In the above embodiment, the electromechanical connection member has a substantially U-shaped contact connection portion into which the tip of the board connection terminal is inserted and which is then clamped by the clamping portion, thereby making the connection position adjustable in the axial direction of the motor. In other embodiments, the connection configuration may be different as long as the electromechanical connection member is connected in a state in which the connection position in the axial direction of the motor is adjustable, for example, by including an elastic member such as a spring that is elastically deformable in the axial direction of the motor.

[0063] In the above embodiment, the board connection terminals are connected to the motor windings via the electromechanical connection members or via the electromechanical connection members and the intermediate connection members. In other embodiments, the board connection terminals and the motor windings may be directly connected.

[0064] In the above embodiment, the drive device is applied to an electric power steering device. In other embodiments, the drive device may be applied to an in-vehicle device other than an electric power steering device, or may be applied to a device other than an in-vehicle device.

[0065] The present disclosure may also be modified as follows: "The winding connection member is held by a holder member (43), and a terminal connection portion (423) is formed from the holder member toward the board, and the terminal connection portion abuts the holder member on a surface opposite to the board."; "The drive device according to any one of items 1 to 6 includes a terminal holder (51) that holds the board connection terminal, and the terminal holder is inserted into a hole portion (131) provided in the motor case from the board side and abuts the motor case on a surface on the axial side."; or "The drive device according to any one of items 7 to 9, wherein the connection point on the other end of the board connection terminal is within a projection area of the terminal holder projected in the motor axial direction."

[0066] As described above, the present invention is not limited to the above-described embodiment, and can be embodied in various forms without departing from the spirit of the invention. [Explanation of symbols]

[0067] 1. Drive unit 10. Motor 11 Motor case 15 Stator 16 Rotor 18 Motor winding 31... Substrate 41, 410...Mechanical and electrical connection members 42 Winding connecting member (other end connecting member) 44... Intermediate connecting member (other end connecting member) 45~48 PCB connection terminal

Claims

1. a motor (10) having a motor case (11), a stator (15) fixed to the motor case, motor windings (18) wound around the stator, a rotor (16) provided so as to be rotatable relative to the stator when current is applied to the motor windings, and a shaft (17) rotatably supported by the motor case and rotating integrally with the rotor; a substrate (31) provided on one side of the motor in the axial direction and on which electronic components related to drive control of the motor are mounted; a mechanical and electrical connection member (41, 410) having board connection terminals (45 to 48) connected to the board and connecting the board and the motor winding; Equipped with One end of the board connection terminal is connected to the board by elastic contact, and the other end is connected to the motor winding in a manner that allows the axial position of the terminal to be adjusted so that the connection position with the board in the motor axial direction is within a predetermined range.

2. If the member connected to the other end side of the board connection terminal is an other end side connection member (42, 44), An insertion portion (425) extending in the motor axial direction is provided on one of the other end side connection member and the board connection terminal, The other of the other end side connection member or the board connection terminal is inserted into the insertion portion and electrically connected by being clamped by the clamping portion (426) at a position corresponding to the insertion depth.

3. The drive unit according to claim 2 , wherein the insertion portion is provided on the other end side connecting member.

4. The electromechanical connection member further includes a winding connection member (42) that connects the motor windings for each phase inside the motor case, 4. The drive device according to claim 1, wherein the other end of the board connection terminal is connected to the winding connection member.

5. The electromechanical connection member further includes a winding connection member (420) that connects the motor windings for each phase inside the motor case, and an intermediate connection member (44) that connects the winding connection member and the board connection terminal, 4. The drive device according to claim 1, wherein the intermediate connection member and the board connection terminal are connected to each other outside the motor case.

6. The winding connection member is held by a holder member (43), and a terminal connection portion (423) is formed to protrude from the holder member toward the substrate, The drive device according to claim 4 , wherein the terminal connection portion abuts against the holder member on a surface opposite to the board.

7. A terminal holder (51) is provided to hold the board connection terminal, 2. The drive device according to claim 1, wherein the terminal holder is inserted into a hole (131) formed in the motor case from the board side, and abuts against the motor case on an axial surface thereof.

8. 8. The drive device according to claim 7, wherein the board connection terminals (45, 46, 48) are insert-molded into the terminal holder.

9. 8. The drive device according to claim 7, wherein the board connection terminal (47) is formed with a shoulder (471) that protrudes from the terminal holder toward the opposite side to the motor, and is outsert-mounted into the terminal holder.

10. 8. The drive device according to claim 7, wherein the connection location on the other end of the board connection terminal is within a projection area of the terminal holder projected in the motor axial direction.

Images