motor

Abstract

A motor is provided. The motor has a drive source unit having a first wiring, a rotation detection unit having a second wiring, and a motor case. The motor case has a first motor case that houses at least a portion of the drive source unit and a second motor case that houses at least a portion of the rotation detection unit. The first motor case has a first through portion that penetrates a peripheral wall portion of the first motor case in a radial direction and that is open at one side in an axial direction, and the second motor case has a second through portion that penetrates a peripheral wall portion of the second motor case in the radial direction and that is open at the other side in the axial direction. The first wiring is drawn out to the outside of the first motor case via the first through portion, and the second wiring is drawn out to the outside of the second motor case via the second through portion.

Description

TECHNICAL FIELD

[0001] The present application relates to a motor. BACKGROUND

[0002] For example, in Patent Document 1, a motor is described in which both a power line for connecting a coil to the outside and a resolver signal line for detecting a rotational position of a motor are drawn out to the outside of a motor case in substantially the same direction.

[0003] Patent Document 1: Japanese Patent No. 5931903

[0004] In the above-described motor, the drawing-out portions of the power line and the resolver signal line from the motor case are often limited. In addition, the shape of the motor case on the cap portion side is complicated, the wiring that is housed inside the motor case and guided to the drawing-out portion is a structure that is easily complicated, and the member that holds the wiring is also a structure that is easily complicated, so the manufacturing cost is high. Therefore, a structure in which the drawing-out of the wiring is simplified is required. SUMMARY

[0005] One of the objects of one embodiment of the present application is to provide a motor that can further simplify the drawing-out structure of the wiring.

[0006] One embodiment of the present application is a motor including: a rotor that is rotatable about a center axis; a stator that has a plurality of coils, the stator being opposed to the rotor in a radial direction; a drive source unit that has a first wiring that is electrically connected to the coils; a rotation detection unit that has a rotation sensor that is capable of detecting rotation of the rotor and a second wiring that is electrically connected to the rotation sensor; and a motor case that houses the rotor, the stator, the drive source unit, and the rotation detection unit inside, the motor case including a first motor case that is cylindrical, that is open on one axial side, and that houses at least a portion of the drive source unit, and a second motor case that is cylindrical, that is disposed opposite the one axial side of the first motor case, that is open on the other axial side, and that houses at least a portion of the rotation detection unit, the first motor case including a first through portion that penetrates a peripheral wall portion of the first motor case in the radial direction and that is open on the one axial side, the second motor case including a second through portion that penetrates a peripheral wall portion of the second motor case in the radial direction and that is open on the other axial side, the first wiring being drawn out to the outside of the first motor case via the first through portion, and the second wiring being drawn out to the outside of the second motor case via the second through portion.

[0007] According to one embodiment of the present application, a motor that can further simplify the drawing-out structure of the wiring is provided. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 FIG. 1 is a perspective view of a motor according to an embodiment.

[0009] Figure 2 FIG. 2 is an exploded perspective view of the motor according to the embodiment.

[0010] Figure 3 FIG. 3 is a longitudinal sectional view of the motor according to the embodiment.

[0011] Figure 4 FIG. 4 is a perspective view showing a portion of the motor according to the embodiment.

[0012] Figure 5 FIG. 5 is a side view of a first wiring support member and a second wiring support member according to the embodiment.

[0013] Figure 6 FIG. 6 is a perspective view showing a portion of the first wiring support member according to the embodiment.

[0014] Figure 7 FIG. 7 is a sectional view taken along a line perpendicular to a center axis of a first motor case according to the embodiment.

[0015] Figure 8 FIG. 8 is a perspective view showing a portion of the first wiring support member according to the embodiment.

[0016] Figure 9 FIG. 9 is a sectional view taken along a line perpendicular to a center axis of a first motor case according to another embodiment.

[0017] Explanation of Reference Numerals

[0018] 1, 1A: motor; 2: motor case; 2A: first motor case; 2B: second motor case; 3: drive source unit; 4: rotation detection unit; 11: rotor; 12: stator; 23: first flange portion; 23a: first through-hole; 22: cylindrical portion; 23A: enlarged diameter portion; 24: first through portion; 24b: upper surface; 24c: recessed portion; 25: fixing member; 27: peripheral wall portion; 28: second flange portion; 28a: second through-hole; 29: second through portion; 29b: lower surface; 30: first wiring support member; 30c: stepped portion; 32: bus bar; 34: first wiring; 40: second wiring support member; 41: second wiring; K1: imaginary line; J: center axis. DETAILED DESCRIPTION

[0019] Hereinafter, an embodiment to which the present application is applied will be described in detail with reference to the drawings.

[0020] Figures 1-3 The motor 1 of the present embodiment shown is mounted on a vehicle or the like, for example.

[0021] In this embodiment, the central axis J of the motor 1 extends vertically. The direction in which the central axis J extends is, for example, the vertical direction Y of the vehicle on which the motor 1 is mounted. In the following description, unless otherwise specified, the direction parallel to the central axis J is simply referred to as "axial direction", the radial direction centered on the central axis J is simply referred to as "radial direction", and the circumferential direction centered on the central axis J, that is, the direction around the central axis J, is simply referred to as "circumferential direction". In addition, in the drawings, the axial direction is appropriately represented by the Y-axis, and the side in which the arrow in the Y-axis points is referred to as the "upper side", and the opposite side in which the arrow in the Y-axis points is referred to as the "lower side". In this embodiment, the upper side corresponds to "one side of the axial direction", and the lower side corresponds to "the other side of the axial direction".

[0022] Additionally, in the accompanying drawings, the Z-axis is appropriately used to represent the horizontal direction perpendicular to the axial direction, and the side in which the arrow in the Z-axis points is referred to as the "right side," while the opposite side is referred to as the "left side." Furthermore, "parallel direction" also includes roughly parallel directions, and "perpendicular direction" also includes roughly perpendicular directions.

[0023] The motor 1 includes: a rotor 11 capable of rotating about a central axis J; a stator 12 having a plurality of coils 12B, the stator 12 being radially opposed to the rotor 11; a drive source unit 3 having a first wiring 34 electrically connected to the coils 12B; a rotation detection unit 4 having a rotation sensor 4A capable of detecting the rotation of the rotor 11 and a second wiring 41 electrically connected to the rotation sensor 4A; and a motor housing 2 that internally houses the rotor 11, the stator 12, the drive source unit 3, and the rotation detection unit 4.

[0024] like Figure 3 As shown, rotor 11 rotates about a central axis J extending in the vertical direction Y. Rotor 11 has: a shaft 11A, which is capable of rotating about the central axis J; and a rotor body 11B, which is fixed to the outer circumferential surface of shaft 11A. Rotor body 11B has, for example, a rotor core and a magnet.

[0025] Shaft 11A is supported by first bearing 13A and second bearing 13B, enabling it to rotate about the central axis J. The rotor core of rotor body 11B is fixed to the outer circumferential surface of shaft 11A. Shaft 11A is a cylindrical hollow shaft extending axially about the central axis J. Shaft 11A extends inside the motor housing 2.

[0026] The stator 12 is located radially outside the rotor 11. The stator 12 has: an annular stator core 12A surrounding the rotor body 11B; and a plurality of coils 12B mounted on the stator core 12A. The stator core 12A is, for example, cylindrical about a central axis J. The coils 12B are mounted on the stator core 12A, for example, through an insulating element (not shown). The ends of the coils 12B are led out towards the upper side of the stator 12 and connected to the busbar 32 of the drive source unit 3.

[0027] The first bearing 13A and the second bearing 13B support the shaft 11A so that it can rotate about the central axis J. The first bearing 13A supports the portion of the shaft 11A located below the portion to which the rotor body 11B is fixed, so that it can rotate. The second bearing 13B supports the portion of the shaft 11A located above the portion to which the rotor body 11B is fixed, so that it can rotate. The first bearing 13A and the second bearing 13B are, for example, ball bearings.

[0028] The motor housing 2 houses the rotor 11 and the stator 12.

[0029] like Figure 2 and Figure 3 As shown, the motor housing 2 includes a first motor housing 2A and a second motor housing 2B. The first motor housing 2A is cylindrical with an opening at the top and houses at least a portion of the drive source unit 3. The second motor housing 2B is disposed opposite the upper side of the first motor housing 2A, and is cylindrical with an opening at the bottom and houses at least a portion of the rotation detection unit 4. The first motor housing 2A and the second motor housing 2B are, for example, separate individual components. The first motor housing 2A and the second motor housing 2B are, for example, manufactured by die casting.

[0030] The first motor housing 2A has a bottom 21, a cylindrical portion 22, and a first flange portion 23. The bottom 21 is located below the stator 12. For example, when viewed axially, the bottom 21 has a circular shape centered on the central axis J. The bottom 21 has a through hole 21a extending axially. A first bearing 13A is disposed in the through hole 21a. Thus, the bottom 21 holds the first bearing 13A. A shaft 11A passes through the through hole 21a.

[0031] The cylindrical portion 22 is located radially outward of the stator 12. The cylindrical portion 22 extends upward from, for example, the radially outer periphery of the bottom 21. The cylindrical portion 22 is, for example, cylindrical with the central axis J as its center. The cylindrical portion 22 has an opening at the top. A stator core 12A is fixed to the cylindrical portion 22. The outer peripheral surface of the stator core 12A contacts the inner peripheral surface of the cylindrical portion 22.

[0032] The cylindrical portion 22 has a first through portion 24 that penetrates the cylindrical portion 22 in the radial direction. The first through portion 24 is open on the upper side. The first through portion 24 is an opening portion that connects the inside of the first motor case 2A and the outside of the motor 1. A first wiring 34 that is connected to a bus bar 32 is led into the first through portion 24.

[0033] The first through portion 24 is located at a position axially opposite the lead-out portion of the first wiring 34. A first wiring support member 30 described later is fitted in the first through portion 24. As shown in Figure 2 、 Figure 4 and Figure 5 , the first through portion 24 has a pair of side surfaces 24a that extend in the vertical direction Y and are circumferentially opposite each other, and an upper surface 24b that joins the lower ends of the pair of side surfaces 24a to each other. The upper surface 24b protrudes from the outer peripheral surface of the cylindrical portion 22 to the radial outer side. As shown in Figure 6 , the upper surface 24b has a recessed portion 24c in which the radially inner portion is recessed downward more than the radially outer portion. The lower protruding portion 30f of the first wiring support member 30 is fitted in the recessed portion 24c. As shown in Figure 2 and Figure 3 , the first through portion 24 is provided at a position in the vertical direction Y at substantially the same height as the bus bar holder 31 described later.

[0034] As shown in Figure 7 , the first flange portion 23 extends and protrudes to the radial outer side from the open end portion on the upper side of the cylindrical portion 22. The first flange portion 23 has a plurality of (three in this embodiment) enlarged diameter portions 23A at a prescribed interval in the circumferential direction. One of the three enlarged diameter portions 23A extends toward a direction parallel to an imaginary line K1 that links a portion where the first wiring support member 30 and the second wiring support member 40 intersect and the center axis J of the rotor 11, when viewed in the axial direction. In this embodiment, the portion where the first wiring support member 30 and the second wiring support member 40 intersect is set as an intersection point P, as an example, when viewed in the axial direction.

[0035] As shown in Figure 1 , the second flange portion 28 of the second motor case 2B described later engages with the upper surface of the first flange portion 23 from above. As shown in Figure 7 , the first flange portion 23 has three enlarged diameter portions 23A at an interval in the circumferential direction. The enlarged diameter portion 23A has a first through hole 23a that penetrates in the axial direction. The first through hole 23a is provided with an internal thread on the inner surface. The first motor case 2A and the second motor case 2B are fixed by fastening the fixing member 25 to the first through hole 23a.

[0036] As shown in Figure 7As shown, one of the plurality of first through holes 23a (first through hole 23aA) is disposed at a position adjacent to the right side (the side opposite the second through portion 29 side of the second motor case 2B described later) of the first through portion 24 in the circumferential direction. The other two through holes 23a (first through holes 23aB, 23aC) are located on opposite sides of the first wiring support member 30 and the second wiring support member 40 across the center axis J of the rotor 11.

[0037] As shown, Figure 2 and Figure 3 the second motor case 2B is separate from the first motor case 2A. The second motor case 2B is fixed to the upper end of the first motor case 2A. The second motor case 2B has a top wall portion 26, a peripheral wall portion 27, and a second flange portion 28. The top wall portion 26 is located on the upper side of the rotor 11 and the stator 12. The top wall portion 26 covers the entirety of the rotor 11 and the stator 12 except for a portion of the shaft 11A from the upper side.

[0038] For example, when viewed in the axial direction, the top wall portion 26 has a circular shape centered on the center axis J. As shown, Figure 3 the top wall portion 26 is disposed with the second bearing 13B on the radially inner side on the lower surface side. Thereby, the second motor case 2B holds the second bearing 13B. The top wall portion 26 covers the outer ring of the second bearing 13B. A central hole 26b that passes through in the axial direction is provided in the top wall portion 26. The shaft 11A is passed through in the central hole 26b.

[0039] The peripheral wall portion 27, for example, has a cylindrical shape that extends downward from the radially outer peripheral edge portion of the top wall portion 26. The peripheral wall portion 27 has a second through portion 29 that passes through in the radial direction. As shown, Figure 4 and Figure 5 the second through portion 29 is open on the lower side. The second through portion 29 is an opening portion that connects the inside of the second motor case 2B and the outside of the motor 1. As shown, Figure 1 and Figure 7 the second through portion 29 has the second wiring 41 that transmits an electric signal for detecting the rotational position of the rotor 11 passed therethrough.

[0040] The second through portion 29 is located at a position axially opposite the lead-out portion of the second wiring 41. The second wiring support member 40 described later is fitted in the second through portion 29. As shown, Figure 2 and Figure 5 the second through portion 29 has a pair of side surfaces 29a that extend in the up-down direction Y and are circumferentially opposite, and a lower surface 29b that joins the upper ends of the pair of side surfaces 29a to each other. The second through portion 29 is provided at a position in the up-down direction Y that is approximately the same height as the rotary transformer stator 43 of the rotation detection unit 4 described later. As shown, Figure 5As shown, a portion of the periphery of the second through portion 29 overlaps the first through portion 24 when viewed in the axial direction. The side surface 29a of the second through portion 29 is located at a position to the right of the side surface 24a of the first through portion 24.

[0041] The second flange portion 28 extends and projects to the radially outer side from the opening end portion of the lower side of the peripheral wall portion 27. The second flange portion 28 has a plurality of (three in the present embodiment) diameter-enlarged portions 28A at a position overlapping the first flange portion 23 in the vertical direction Y at a prescribed interval in the peripheral direction. Figure 7 The second flange portion 28, the diameter-enlarged portions 28A, and the second through hole 28a described later are each provided at the same position and shape as the first flange portion 23, the diameter-enlarged portions 23A, and the first through hole 23a when viewed in the axial direction, and thus are indicated by dashed lines.

[0042] The first flange portion 23 of the first motor case 2A engages with the lower surface of the second flange portion 28 from below. The second flange portion 28 has three diameter-enlarged portions 28A at intervals in the peripheral direction. The diameter-enlarged portions 28A have second through holes 28a that pass through in the axial direction. The second through holes 28a are provided with internal threads on the inner surfaces. The second flange portion 28 is fixed to the first flange portion 23 by the fixing member 25 that links the first motor case 2A and the second motor case 2B. The second through holes 28a are fastened with the fixing member 25 in a state of being coaxially aligned with the first through holes 23a of the first flange portion 23.

[0043] One of the plurality of second through holes 28a (second through hole 28aA) is disposed at a position adjacent to the right side of the second through portion 29 (the right side of the first through portion 24 of the first motor case 2A) in the peripheral direction. The other two second through holes 28a (second through holes 28aB, 28aC) are located on opposite sides of the first wiring support member 30 and the second wiring support member 40 with respect to the central axis J of the rotor 11.

[0044] As shown, the lower surface of the second flange portion 28 of the portion in which the second through hole 28aA is disposed adjacent to the first wiring support member 30 has a groove 28b extending in the peripheral direction. The upper protrusion 30e of the first wiring support member 30 is fitted in the groove 28b. Figure 8

[0045] In the present embodiment, the first motor case 2A and the second motor case 2B are fixed to each other by locating the first through hole 23a provided to the first flange portion 23 and the second through hole 28a provided to the second flange portion 28 at coaxial positions, and fastening the fixing member 25 to these through holes 23a, 28a.

[0046] As shown, the lower surface of the second flange portion 28 of the portion in which the second through hole 28aA is disposed adjacent to the first wiring support member 30 has a groove 28b extending in the peripheral direction. The upper protrusion 30e of the first wiring support member 30 is fitted in the groove 28b. Figure 3 ​As shown in FIG. 1, the drive source unit 3 is located on the upper side of the stator 12. The drive source unit 3 has a terminal 32B connected to a control device not shown via a first wiring 34, and a connection portion (not shown) connected to the end portion of the coil 12B. The drive source unit 3 supplies an alternating current supplied from the control device to each coil 12B. The drive source unit 3 has a first wiring support member 30 capable of elastically deforming, which holds the first wiring 34. The first wiring 34 is drawn out to the outside of the first motor case 2A through the first through portion 24.

[0047] As shown in FIG. 1, the drive source unit 3 has a bus bar holder 31 composed of resin, and a plurality of bus bars 32 embedded in the bus bar holder 31. The plurality of bus bars 32 are embedded in the bus bar holder 31 by insert molding. The bus bar holder 31 is composed of a resin material having insulation. Figure 2 Figure 3 The bus bar holder 31 is a resin member that holds the bus bars 32. The bus bar holder 31 is installed on the upper side of the stator 12. The bus bar holder 31 is housed in the first motor case 2A.

[0048] The bus bar 32 is electrically connected to the stator 12 inside the first motor case 2A. The bus bar 32 is composed of a metal material (for example, copper alloy) having high electrical conductivity. The bus bar 32 is in a plate shape. The bus bar 32 is formed by press working a plate material.

[0049] As shown in FIG. 1, the first wiring support member 30 is fitted in the first through portion 24. The first wiring support member 30 is supported between the upper surface 24b (bottom portion) of the first through portion 24 and the lower end surface 2b of the second motor case 2B. The material of the first wiring support member 30 uses, for example, a material capable of elastically deforming such as rubber, foamed resin, or the like.

[0050] As shown in FIG. 1, the first wiring support member 30 is fitted in the first through portion 24. The first wiring support member 30 is supported between the upper surface 24b (bottom portion) of the first through portion 24 and the lower end surface 2b of the second motor case 2B. The material of the first wiring support member 30 uses, for example, a material capable of elastically deforming such as rubber, foamed resin, or the like. Figure 1 Figure 2 The first wiring support member 30 is provided with a plurality of through insertion holes 30d through which the first wiring 34 is inserted in a direction perpendicular to the axial direction. The plurality of through insertion holes 30d are provided at intervals in the circumferential direction. The plurality of through insertion holes 30d are disposed at approximately the center of the up-down direction Y of the first wiring support member 30. The inner diameter of the through insertion hole 30d is the same as or slightly smaller than the outer diameter of the first wiring 34. The first wiring support member 30 is bisected at approximately the center of the up-down direction Y. The bisected position of the first wiring support member 30 is a position at which the through insertion hole 30d is also bisected in the up-down direction Y.

[0051] The first wiring support member 30 is provided with a plurality of through insertion holes 30d through which the first wiring 34 is inserted in a direction perpendicular to the axial direction. The plurality of through insertion holes 30d are provided at intervals in the circumferential direction. The plurality of through insertion holes 30d are disposed at approximately the center of the up-down direction Y of the first wiring support member 30. The inner diameter of the through insertion hole 30d is the same as or slightly smaller than the outer diameter of the first wiring 34. The first wiring support member 30 is bisected at approximately the center of the up-down direction Y. The bisected position of the first wiring support member 30 is a position at which the through insertion hole 30d is also bisected in the up-down direction Y.

[0052] ​​The first wiring support member 30 has an upper surface 30a which is axially opposed to the second motor case 2B. The upper surface 30a is fitted to the lower end surface 2b of the second motor case 2B. As shown in Figure 8 , the upper surface 30a has an upper protrusion 30e which protrudes to the one axial side and extends in the circumferential direction. The lower end surface 2b of the second motor case 2B has a recess 28b which is recessed to the one axial side and extends in the circumferential direction. The upper protrusion 30e is fitted to the recess 28b of the second motor case 2B. Further, as shown in Figure 6 , the first wiring support member 30 has a lower surface 30b which is axially opposed to the upper surface 24b of the first through portion 24 in the first motor case 2A. The upper surface 24b has a recessed portion 24c which is recessed to the other axial side and extends in the circumferential direction. The lower surface 30b has a lower protrusion 30f which protrudes to the other axial side and extends in the circumferential direction. The lower protrusion 30f is fitted to the recessed portion 24c of the upper surface 24b of the first through portion 24.

[0053] As shown in Figure 5 , a portion of the circumferential direction of the first wiring support member 30 overlaps the second wiring support member 40 when viewed in the axial direction. That is, the left end portion 30g of the first wiring support member 30 is located at a position which is leftward of the right end portion 40e of the second wiring support member 40 in the circumferential direction.

[0054] As shown in Figure 4 and Figure 8 , the first wiring support member 30 is provided with a stepped portion 30c which is recessed in the axial direction at a portion which is axially opposed to the second wiring support member 40. The stepped portion 30c is located at the left end portion of the upper surface 30a of the first wiring support member 30. As shown in Figure 5 , the stepped portion 30c is recessed to the lower axial side than the opening edge 24d in the axial direction of the first through portion 24. The opening edge 24d of the first through portion 24 is located at the upper end surface 2a of the first motor case 2A. In a state where the first wiring support member 30 is disposed in the first through portion 24 and the second motor case 2B is not attached, the upper surface 30a of the first wiring support member 30 is located at a position which is upward of the upper end surface 2a of the first motor case 2A. When the second motor case 2B is attached, the first wiring support member 30 is pressed downward by the lower end surface 2b of the second motor case 2B, and thus the position of the upper surface 30a becomes the same position as the upper end surface 2a of the first motor case 2A. The stepped portion 30c is located at a position which is downward of the upper end surface 2a of the first motor case 2A in a state where it is pressed in the up-down direction.

[0055] As shown in Figure 2 and Figure 3As shown, the rotation detecting unit 4 is capable of detecting the rotation of the rotor 11. The rotation detecting unit 4 is located, for example, on the upper side of the driving source unit 3 inside the second motor case 2B. In the present embodiment, the rotation sensor 4A of the rotation detecting unit 4 is a rotary transformer. The rotation sensor 4A has a rotary transformer rotor 42 and a rotary transformer stator 43. The rotary transformer rotor 42 is fixed to the outer peripheral surface of the shaft 11A. The rotary transformer stator 43 is located radially outward of the rotary transformer rotor 42. The rotary transformer stator 43 is annular and surrounds the rotary transformer rotor 42. The rotary transformer stator 43 is fixed to the face on the lower side of the top wall portion 26 of the second motor case 2B, for example. The rotation detecting unit 4 has a second wiring support member 40 that has a plurality of terminals, not shown. The second wiring 41 is connected to the plurality of terminals, respectively.

[0056] The rotary transformer stator 43 has a coil 43a. The rotary transformer rotor 42 rotates together with the shaft 11A, and an induced voltage corresponding to the circumferential position of the rotary transformer rotor 42 is generated in the coil of the rotary transformer stator 43. The rotation detecting unit 4 is capable of detecting the rotation of the rotary transformer rotor 42 and the shaft 11A based on the change in the induced voltage generated in the coil of the rotary transformer stator 43. Thus, the rotation detecting unit 4 is capable of detecting the rotation of the rotor 11.

[0057] The second wiring support member 40 is provided to a part of the circumference of the rotary transformer stator 43 of the rotation detecting unit 4. The second wiring support member 40 protrudes toward the radially outer side from the rotary transformer stator 43. The second wiring support member 40 is fitted in the second through portion 29 of the second motor case 2B. As shown in FIG. 6, the second wiring 41 is drawn out to the outside of the second motor case 2B via the second through portion 29. As shown in FIG. 7, the second wiring support member 40 is supported between the lower surface 29b of the second through portion 29 and the upper end surface 2a of the first motor case 2A. When viewed in the radial direction, the axial position of the lower end 40a of the second wiring support member 40 substantially coincides with the axial position of the upper surface 30a of the first wiring support member 30. As shown in FIG. 8, the second wiring support member 40 protrudes more toward the radially outer side than the peripheral wall portion 27 of the second motor case 2B in the state of being fitted in the second through portion 29. The second wiring support member 40 is a member that is more rigid than the first wiring support member 30, for example. The second wiring support member 40 is made of resin, for example. Figure 1 Figure 5 Figure 1 Figure 2

[0058] Figure 2 ​​​​​As shown, the second wiring support member 40 has terminals (not shown) for connecting a plurality of second wirings 41. The terminals are electrically connected to the stator 43 of the rotary transformer via the second wirings 41. The second wirings 41 are connected to the terminals of the second wiring support member 40. The second wiring support member 40 is provided with a plurality of through insertion holes 40d for the second wirings 41 to be inserted through in a direction perpendicular to the axial direction. Figure 5 As shown, a plurality of through-holes 40d are arranged at intervals along the circumference. The plurality of through-holes 40d are positioned approximately at the center in the vertical Y direction. The inner diameter of the through-holes 40d is the same as or slightly smaller than the outer diameter of the second wiring 41.

[0059] Here, as Figure 7 As shown, in the first wiring support member 30, the line connecting the circumferential center C1 of the first wiring support member 30 and the central axis J when viewed axially is designated as the first line L1. Similarly, in the second wiring support member 40, the line connecting the circumferential center C2 of the second wiring support member 40 and the central axis J when viewed axially is designated as the second line L2. The angle θ1 formed by the first line L1 and the second line L2 is, for example, approximately 50 degrees. The angle θ1 is preferably between 50 and 70 degrees.

[0060] In this embodiment, the motor housing 2 includes: a cylindrical first motor housing 2A with an opening at the top to house at least a portion of the drive source unit 3; and a cylindrical second motor housing 2B disposed opposite the top of the first motor housing 2A and with an opening at the bottom to house at least a portion of the rotation detection unit 4. The first motor housing 2A has a first through portion 24 that radially penetrates the cylindrical portion 22 and has an opening at the top. The second motor housing 2B has a second through portion 29 that radially penetrates the peripheral wall portion 27 and has an opening at the bottom. Therefore, the first wiring 34 can be led out to the outside of the first motor housing 2A via the first through portion 24. The second wiring 41 can be led out to the outside of the second motor housing 2B via the second through portion 29. By adopting such a structure, the through portions 24 and 29 can be provided in the first motor housing 2A and the second motor housing 2B respectively, depending on the axial arrangement in the internal structure. That is, the first through-part 24 and the second through-part 29 can be provided according to the removal position of the first wire 34 in the drive source unit 3 and the removal position of the second wire 41 in the rotation detection unit 4, respectively. The first wire 34 or the second wire 41 can be led outwards through the through-parts 24 and 29 at the original height without adjusting and changing the height inside the motor housing 2. Therefore, the wiring housed inside the motor housing 2 and guided to the lead-out portions (first wire support member 30 and second wire support member 40) and the structure for holding the wiring can be simplified. In this embodiment, the structure of the motor 1 does not become complicated, thus reducing manufacturing costs.

[0061] Further, according to the present embodiment, the drive source unit 3 has a first wire support member 30 that is elastically deformable and that holds the first wire 34. The first wire support member 30 is fitted in the first through-hole 24. Thereby, the force and the impact received from the second motor case 2B can be effectively absorbed by the elastic deformation of the first wire support member 30. Thus, the force and the impact from the second motor case 2B applied to the first wire 34 passing through the first wire support member 30 are reduced, and thus the first wire 34 can be protected.

[0062] Further, according to the present embodiment, the rotation detection unit 4 has a second wire support member 40 that holds the second wire 41. The second wire support member 40 is disposed in the second through-hole 29. A portion of the first wire support member 30 and a portion of the second wire support member 40 are opposed to each other in the axial direction. Further, a stepped portion 30c recessed in the axial direction is provided in the portion of the first wire support member 30 that is opposed to the second wire support member 40 in the axial direction. Thus, when the first motor case 2A and the second motor case 2B are combined, the first wire support member 30 is crushed in the axial direction by elastic deformation. The stepped portion 30c of the first wire support member 30 that has been elastically deformed in the axial direction is lower than the upper end surface 2a of the first motor case 2A, and thus contact of the first wire support member 30 with the second wire support member 40 can be prevented. Thereby, the force received by the second wire support member 40 from the first wire support member 30 can be suppressed. Thus, breakage of the second wire support member 40 due to the impact can be prevented.

[0063] Further, according to the present embodiment, the stepped portion 30c is recessed in the axial direction than the opening edge in the first through-hole 24. In such a structure, even if the second wire support member 40 enters the inside via the opening edge of the first through-hole 24, the second wire support member 40 can be reliably prevented from contacting the first wire support member 30 by the stepped portion 30c of the first wire support member 30.

[0064] Further, according to the present embodiment, the first wire support member 30 is supported between the upper surface 24b of the first through-hole 24 and the lower end surface 2b of the second motor case 2B. The second wire support member 40 is supported between the upper portion of the second through-hole 29 and the upper end surface 2a of the first motor case 2A. The first wire support member 30 and the second wire support member 40 are respectively fixed in the axial direction, and thus movement of the first wire support member 30 and the second wire support member 40 in the axial direction is suppressed. Thus, contact of the first wire support member 30 with the second wire support member 40 can be prevented. Thereby, the force applied from the first wire support member 30 to the second wire support member 40 can be suppressed.

[0065] Further, according to the present embodiment, at least a portion of the first through portion 24 and the second through portion 29 overlap when viewed in the axial direction. Therefore, the first wiring support member 30 that is fitted into the first through portion 24 and the second wiring support member 40 that is fitted into the second through portion 29 can be arranged in a concentrated manner in the circumferential direction. Thus, the arrangement area of the first wiring support member 30 and the second wiring support member 40 can be reduced. Therefore, the lead-out configuration of the wiring can be simplified.

[0066] Further, according to the present embodiment, at least a portion of the first wiring support member 30 and the second wiring support member 40 overlap when viewed in the axial direction. Therefore, the first wiring support member 30 and the second wiring support member 40 can be arranged in a more concentrated manner in the circumferential direction. Thus, the arrangement area of the first wiring support member 30 and the second wiring support member 40 can be reduced. Therefore, the lead-out configuration of the wiring can be further simplified.

[0067] Further, according to the present embodiment, the first motor case 2A has a first flange portion 23 that expands to the radial direction outside from the opening edge in the axial direction. The second motor case 2B has a second flange portion 28 that expands to the radial direction outside from the opening edge in the axial direction. The first flange portion 23 has a plurality of first through holes 23a that pass through in the axial direction. The second flange portion 28 has a plurality of second through holes 28a that pass through in the axial direction. The first flange portion 23 and the second flange portion 28 have a plurality of fixing members 25 that are inserted through the first through hole 23a and the second through hole 28a that are opposed in the axial direction. At least one of the plurality of fixing members 25 is adjacent to the opposite side of the first wiring support member 30 on which the second wiring support member 40 is arranged in the circumferential direction. Further, the other fixing members 25 are located on the opposite side of the first wiring support member 30 and the second wiring support member 40 with respect to the center axis J of the rotor 11. Thus, the plurality of fixing members 25 can be arranged in balance by being equally close in the circumferential direction of the motor 1. Therefore, the first motor case 2A and the second motor case 2B can be appropriately fixed. Further, the motor 1 can be given stable strength with respect to a load from the outside.

[0068] Further, according to the present embodiment, as Figure 7As shown, the first flange portion 23 and the second flange portion 28 have an expanded diameter portion 23A, 28A that extends in a direction parallel to an imaginary line K1 connecting a portion where the first wiring support member 30 and the second wiring support member 40 intersect and the center axis J of the rotor 11 when viewed in the axial direction, and that is provided with the first wiring support member 30 and the second wiring support member 40. The fixing member 25 is provided to the expanded diameter portion 23A, 28A. In such a configuration, the first flange portion 23 and the second flange portion 28 do not protrude significantly beyond the wire connection direction outside of the first motor case 2A and the second motor case 2B in a direction parallel to the imaginary line K1 when viewed in the axial direction. Therefore, it is possible to suppress the radial enlargement of the motor 1. Also, it is possible to make the fixing configuration of the first motor case 2A and the second motor case 2B a fixing configuration that is uniform in the circumferential direction.

[0069] In addition, according to the present embodiment, the angle θ formed by a first line L1 connecting the circumferential center C1 of the first wiring support member 30 and the center axis J and a second line L2 connecting the circumferential center C2 of the second wiring support member 40 and the center axis J is 50 to 70 degrees. When the angle θ is small and the area where the first wiring support member 30 and the second wiring support member 40 overlap in the axial direction becomes too large, it is easy for a force to be applied from the first wiring support member 30 that is able to elastically deform to the second wiring support member 40, causing the second wiring support member 40 to possibly tilt. Therefore, by making the angle θ 50 degrees or more, it is possible to suppress the area where the first wiring support member 30 and the second wiring support member 40 overlap in the circumferential direction from becoming large, and thus it is possible to suppress a force from being applied from the first wiring support member 30 to the second wiring support member 40 from being generated. Therefore, it is possible to suppress the second wiring support member 40 from tilting. In addition, when the angle θ exceeds 70 degrees, the first wiring support member 30 and the second wiring support member 40 do not overlap and separate excessively in the circumferential direction, causing the motor 1 to become large in the radial direction. Therefore, by making the angle θ 50 to 70 degrees, it is possible to appropriately configure the first wiring support member 30 and the second wiring support member 40 in terms of configuration and manufacturing cost.

[0070] In addition, according to the present embodiment, the first wiring support member 30 has an upper surface 30a that opposes the second motor case 2B in the axial direction. The upper surface 30a has an upper protrusion 30e that protrudes toward the axial direction side and extends in the circumferential direction. The lower end surface 2b of the second motor case 2B has a recess 28b that is recessed toward the axial direction side and extends in the circumferential direction. The upper protrusion 30e and the recess 28b are fitted. In such a configuration, it is possible to improve the fitting strength of the first wiring support member 30 with respect to the first through portion 24. Therefore, even in the case where a tensile force acts on the first wiring 34, it is possible to prevent the first wiring support member 30 from being pulled out of the first through portion 24 and deviating or falling off.

[0071] Further, according to the present embodiment, the first wiring support member 30 has a lower surface 30b that opposes the first through portion 24 in the axial direction. The lower surface 30b has a lower protrusion 30f that protrudes toward the other side in the axial direction and extends in the circumferential direction. The upper surface 24b of the first through portion 24 has a recessed portion 24c that is recessed toward the other side in the axial direction and extends in the circumferential direction. The lower protrusion 30f is fitted with the recessed portion 24c. In such a configuration, the fitting strength of the first wiring support member 30 with respect to the first through portion 24 can be improved. Thus, even in the case where a tensile force acts on the first wiring 34, the first wiring support member 30 can be prevented from being pulled out of the first through portion 24 and deviated or detached.

[0072] Further, according to the present embodiment, the rotation detection unit 4 is positioned on the upper side of the drive source unit 3. In this case, the second wiring 41 of the rotation detection unit 4 is disposed at a position on the upper side than the first wiring 34 of the drive source unit 3, so that the upper and lower positions of the first through portion 24 and the second through portion 29 can be made the same position. Thus, since the wirings are drawn from each through portion 24, 29 depending on the positions of the drive source unit 3 and the rotation detection unit 4, the configuration of the wirings housed inside the motor case 2 and guided to the drawing-out portions and the configuration of holding the wirings can be further simplified.

[0073] Further, according to the present embodiment, as shown in Figure 3 the upper end of the first wiring support member 30 is positioned at a position on the upper side (axial direction one side) than the lower end of the rotation detection unit 4. In such a configuration, the opening area of the first through portion 24 of the first motor case 2A can be inhibited from being increased in the axial direction. Thus, the rigidity of the first motor case 2A can be inhibited from being reduced. That is, the case where the first through portion 24 is upsized in the axial direction and the strength of the first motor case 2A is reduced as in the case where the upper end of the first wiring support member 30 is positioned at a position on the lower side than the lower end of the rotation detection unit 4 can be inhibited.

[0074] As described above, according to the present embodiment, in the motor 1, the drawing-out configuration of the wirings can be further simplified.

[0075] The above describes the embodiments of the present application, but the structures in the embodiments and combinations thereof and the like are one example, and the addition, omission, substitution, and other changes of the structures can be made within the scope of the gist of the present application. Further, the present application is not limited by the embodiments.

[0076] For example, as shown in Figure 9As shown, in the motor 1A of the other embodiment, at least one third stationary member 25C of the plurality of stationary members 25 is located between the first wiring support member 30 and the second wiring support member 40 in the circumferential direction. The other stationary members 25D are located on the opposite side of the first wiring support member 30 and the second wiring support member 40 with respect to the center axis J of the rotor 11. The angle θ2 between the first wire L1 and the second wire L2 is, for example, approximately 70 degrees. In such a structure, the plurality of stationary members 25 can be equally approached in the circumferential direction of the motor 1 and evenly arranged. Therefore, the first motor case 2A and the second motor case 2B can be appropriately fixed. In addition, the motor 1 can be given strength stable with respect to a load from the outside.

[0077] The stationary member 25 can also be adjacent to the opposite side (left side) of the second wiring support member 40 on which the first wiring support member 30 is arranged.

[0078] The use of the motor to which the present application is applied is not particularly limited. The motor can be mounted on a device other than a device mounted on a vehicle. The direction in which the center axis of the motor extends is not particularly limited, and can be a vertical direction as in the present embodiment, or a direction inclined with respect to both the horizontal direction and the vertical direction. Each structure and each method described above in the present specification can be appropriately combined within a range in which they do not contradict each other.

Claims

1. A motor having: A rotor that can rotate about its central axis; A stator having multiple coils, the stator being radially opposed to the rotor; A driving source unit having a first wiring electrically connected to the coil; A rotation detection unit having a rotation sensor capable of detecting the rotation of the rotor and a second wiring electrically connected to the rotation sensor; as well as The motor housing internally houses the rotor, the stator, the drive source unit, and the rotation detection unit. The motor housing has: A cylindrical first motor housing, open on one axial side, housing at least a portion of the drive source unit; and A cylindrical second motor housing is disposed opposite the first motor housing on one axial side and open on the other axial side to house at least a portion of the rotation detection unit. The first motor housing has a first through portion that extends radially through the peripheral wall of the first motor housing and opens on one side in the axial direction. The second motor housing has a second through portion that extends radially through the peripheral wall of the second motor housing and opens on the other side in the axial direction. The first wiring extends outward from the first motor housing via the first through-hole. The second wiring extends outward from the second motor housing via the second through portion. The drive source unit has a first wiring support member that holds the first wiring. The first wiring support component is fitted into the first through portion. The rotation detection unit has a second wiring support member that holds the second wiring. The second wiring support component is fitted into the second through portion. A portion of the first wiring support component and a portion of the second wiring support component are axially opposed to each other.

2. The motor according to claim 1, wherein, The first wiring support component is capable of elastic deformation.

3. The motor according to claim 1 or 2, wherein, The portion of the first wiring support member that is axially opposite to the second wiring support member is provided with an axially recessed step.

4. The motor according to claim 3, wherein, The stepped portion is axially recessed compared to the axial opening edge in the first through portion.

5. The motor according to claim 3, wherein, The first wiring support component is supported between the bottom of the first through portion and the lower end face of the second motor housing. The second wiring support member is supported between the upper part of the second through portion and the upper end face of the first motor housing.

6. The motor according to claim 3, wherein, When viewed from the axial direction, at least a portion of the first through portion and the second through portion overlap.

7. The motor according to claim 3, wherein, When viewed from the axial direction, at least a portion of the first wiring support component and the second wiring support component overlap.

8. The motor according to claim 3, wherein, The first motor housing has a first flange portion that extends radially outward from an axial opening edge. The second motor housing has a second flange portion that extends radially outward from an axial opening edge. The first flange portion has a plurality of first through holes extending along the axial direction. The second flange portion has a plurality of second through holes extending along the axial direction. The motor also has a plurality of fixing components that are inserted through the first through hole and the second through hole which are axially opposed. At least one of the plurality of fixing components is adjacent in the circumferential direction to either the side of the first wiring support component opposite to the side where the second wiring support component is disposed, or the side of the second wiring support component opposite to the side where the first wiring support component is disposed. Other fixed components are located on opposite sides of the first wiring support component and the second wiring support component relative to the central axis of the rotor.

9. The motor according to claim 8, wherein, The first flange portion and the second flange portion have an enlarged diameter portion extending in a direction parallel to an imaginary line when viewed from the axial direction, and in which the first wiring support member and the second wiring support member are disposed. This imaginary line connects the portion where the first wiring support member and the second wiring support member intersect and the central axis of the rotor. The fixing component is disposed on the enlarged diameter section.

10. The motor according to claim 3, wherein, The first motor housing has a first flange portion that extends radially outward from an axial opening edge. The second motor housing has a second flange portion that extends radially outward from an axial opening edge. The first flange portion has a plurality of first through holes extending along the axial direction. The second flange portion has a plurality of second through holes extending along the axial direction. The motor also has a plurality of fixing components that are inserted through the first through hole and the second through hole which are axially opposed. At least one of the plurality of fixing components is located circumferentially between the first wiring support component and the second wiring support component. Other fixed components are located on opposite sides of the first wiring support component and the second wiring support component relative to the central axis of the rotor.

11. The motor according to claim 3, wherein, The angle between the first line connecting the circumferential center of the first wiring support component and the central axis of the rotor and the second line connecting the circumferential center of the second wiring support component and the central axis of the rotor is 50 degrees to 70 degrees.

12. The motor according to claim 2, wherein, The first wiring support member has an upper surface that is axially opposed to the second motor housing. The upper surface has an upper convex portion that protrudes to one axial direction and extends circumferentially. The lower surface of the second motor housing has a groove that is recessed to one axial direction and extends circumferentially. The upper protrusion engages with the groove.

13. The motor according to claim 2, wherein, The first wiring support member has a lower surface that is axially opposed to the first through portion. The lower surface has a downward protrusion that projects axially to the other side and extends circumferentially. The upper surface of the first through portion has a recess that is recessed to the other side of the axial direction and extends circumferentially. The lower convex part is fitted into the concave part.

14. The motor according to claim 13, wherein, The rotation detection unit is located on one side of the drive source unit along its axis.

15. The motor according to claim 2, wherein, The upper end of the first wiring support component is located on the axial side of the lower end of the rotation detection unit.

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