Motor

Abstract

To provide a motor in which a foreign substance hardly enters a resolver.SOLUTION: A motor 1 has a motor stator 12, a motor rotor 13, a shaft 14, a resolver 15, and a wiring member 16. The motor stator is formed in an annular shape around a central axis J extending in a first direction D1. The motor rotor is opposed to the motor stator in a radial direction and is rotated in a circumferential direction. The shaft is attached to the motor rotor and extends in the first direction. The resolver is attached to the shaft and detects the rotation of the motor rotor. The wiring member lays a conductive wire 20. The resolver is disposed at one side D11 in the first direction with respect to the motor rotor. The wiring member is disposed at one side in the first direction with respect to the resolver. The other side D12 in the first direction of the wiring member covers at least one side in the first direction of the resolver.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a motor. [Background technology]

[0002] The electric motor of Patent Document 1 includes a motor cover having a substantially cylindrical motor yoke, a motor rotor provided on a shaft rotatably supported within the motor cover, a motor stator provided on the motor yoke, and a resolver that detects the rotation angle of the motor rotor. In the electric motor of Patent Document 1, the resolver is formed with a resolver rotor attached to the shaft and a resolver stator positioned to face the resolver rotor. In the electric motor of Patent Document 1, the resolver stator is attached to and supported by the motor yoke by a support member made of a non-magnetic material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-318745 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the electric motor of Patent Document 1, the resolver stator is attached to a recessed space in a support member, and a rear cover is attached to cover the support member. At this time, a space into which foreign matter can enter is formed in the resolver rotor and resolver stator located between the resolver stator and the rear cover.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and has an object to provide a motor in which foreign matter is less likely to enter the resolver. [Means for solving the problem]

[0006] An exemplary motor of the present disclosure includes a motor stator, a motor rotor, a shaft, a resolver, and a wiring member. The motor stator is annular about a central axis extending in a first direction. The motor rotor is radially opposed to the motor stator and rotates in a circumferential direction. The shaft is attached to the motor rotor and extends in a first direction. The resolver is attached to the shaft and detects rotation of the motor rotor. The wiring member wires a conductive wire. The resolver is disposed on one side in the first direction with respect to the motor rotor. The wiring member is disposed on one side in the first direction with respect to the resolver. The other side in the first direction of the wiring member covers at least one side in the first direction of the resolver. Effect of the Invention

[0007] According to the exemplary embodiment of the present disclosure, foreign matter is less likely to enter the resolver. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing the external appearance of a motor according to an exemplary embodiment. [Diagram 2] FIG. 2 is an exploded view showing the inside of the motor of the exemplary embodiment. [Diagram 3] FIG. 3 is a cross-sectional view of an exemplary embodiment motor. [Figure 4] FIG. 4 is an exploded view of the inside of the first case of the motor case. [Diagram 5] FIG. 5 is a diagram showing wiring of conductive wires in the wiring member. [Figure 6] FIG. 6 is an exploded view of the first case seen from an angle different from that in FIG. [Figure 7] FIG. 7 is a diagram showing the resolver 15 and the wiring member 16. As shown in FIG. [Figure 8] FIG. 8 is a cross-sectional view similar to FIG. 3 of the motor of the first modified example of the exemplary embodiment. [Figure 9] FIG. 9 is a cross-sectional view similar to FIG. 3 of the motor of the second modification of the exemplary embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an exemplary embodiment of the present disclosure will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and the description will not be repeated. In this specification, for ease of understanding, the central axis direction substantially parallel to the rotation shaft of the motor is described as the first direction D1, one side of the first direction D1 is described as the first direction one side D11, and the other side of the first direction D1 is described as the first direction other side D12. In addition, the radial direction centered on the rotation shaft of the motor is described as the radial direction D2, and the circumferential direction centered on the rotation shaft of the motor is described as the circumferential direction D3. However, the directions are defined merely for convenience of explanation, and the orientation of the motor according to the present invention during use is not limited, except when it is necessary to particularly define the horizontal direction and the vertical direction. In addition, in this application, the "orthogonal direction" also includes a substantially orthogonal direction.

[0010] A motor 1 according to an exemplary embodiment will be described with reference to Figures 1 and 2. Figure 1 is a diagram showing the external appearance of the motor 1 according to the exemplary embodiment. Figure 2 is an exploded view showing the inside of the motor 1 according to the exemplary embodiment. Some components of the motor 1 shown in Figure 1 are omitted in Figure 2.

[0011] As an example, the motor 1 is used as a driving force source for the wheels of a small four-wheeled vehicle.

[0012] As shown in FIGS. 1 and 2, the motor 1 includes a motor case 11, a motor stator 12, a motor rotor 13, a shaft 14, a resolver 15, and wiring members 16.

[0013] Motor stator 12 has an annular shape centered on a central axis J extending in a first direction D1. Motor stator 12 has an annular or cylindrical stator core (not shown) and a coil (not shown) wound around the stator core.

[0014] The motor rotor 13 faces the motor stator 12 in the radial direction D2. In this embodiment, the motor rotor 13 is located inside the motor stator 12 in the radial direction D2. The motor rotor 13 has a yoke (not shown) and a magnet (not shown) arranged on the yoke. Due to the interaction between a coil (not shown) and a magnet (not shown), the motor rotor 13 rotates in the circumferential direction D3 around the central axis J relative to the motor stator 12. That is, in this embodiment, the motor 1 is an inner rotor type motor. However, the motor 1 may be an outer rotor type motor in which the motor rotor 13 is located outside the motor stator 12 in the radial direction D2.

[0015] A shaft 14 extending in a first direction D1 is attached to the motor rotor 13. The shaft 14 coincides with the central axis J. In other words, the shaft 14 is the rotation axis of the motor rotor 13.

[0016] Further, a resolver 15 is attached to the motor rotor 13. The resolver 15 detects the rotation of the motor rotor 13 and outputs the detection result as an electrical signal. The process in the resolver 15 will be described later. For example, the resolver 15 is disposed on one side D11 in the first direction with respect to the motor rotor 13. Specifically, the resolver 15 is attached to an end of the shaft 14 on one side D11 in the first direction.

[0017] The motor 1 is connected to a conductive wire 20 that is electrically connected to, for example, the outside. As an example, the conductive wire 20 includes power lines 20U, 20V, and 20W through which three-phase AC flows and a signal line 20L through which an electric signal flows. The power lines 20U, 20V, and 20W are conductive wires that are electrically connected to the coils of the motor stator 12, and may take various forms, such as lead wires, metal bus bars, terminals, and conductive wires that are combinations of these. In this embodiment, the power lines 20U, 20V, and 20W are provided with two conductive wires in which a metal bar (terminal) is connected to a lead wire. One of the power lines is wired from the motor case 11 to the outside and connected to an external power source such as an inverter. The other is a wire in which a terminal is connected to a coil terminal wire (not shown) extending from the coils of the motor stator 12.

[0018] A wiring member 16 is provided for wiring the conductive wires 20. For example, the wiring member 16 is formed of an insulating resin. The wiring member 16 and the wiring of the conductive wires 20 will be described later.

[0019] The wiring member 16 is disposed on the first direction one side D11 with respect to the resolver 15. In other words, the wiring member 16 is located closer to the first direction one side D11 than the motor rotor 13 and the resolver 15. Therefore, the first direction other side D12 of the wiring member 16 covers at least the first direction one side D11 of the resolver 15. Therefore, foreign matter is less likely to enter the resolver 15 from at least the first direction one side D11 of the resolver 15.

[0020] Next, the motor case 11 will be described with reference to Figures 1 to 3. Figure 3 is a cross-sectional view of the motor 1. Figure 3 shows a cross section passing through the central axis J and taken along the first direction D1 and the radial direction D2.

[0021] The motor case 11 houses the motor stator 12, the motor rotor 13, the shaft 14, the resolver 15, and the wiring members 16. Specifically, the motor case 11 has a first case 11A and a second case 11B connected to each other in a first direction D1. The first case 11A houses the resolver 15, the wiring members 16, and a portion of the shaft 14 on one side D11 in the first direction. The second case 11B houses the motor stator 12, the motor rotor 13, and a portion of the shaft 14 on the other side D12 in the first direction.

[0022] As an example, the second case 11B has a cylindrical shape that follows the outer shape of the motor stator 12. A partition wall portion 111 that separates the motor rotor 13 and the resolver 15 is provided between the first case 11A and the second case 11B. For example, the first case 11A of the motor case 11 has the partition wall portion 111 and a wiring member accommodating portion 112. The wiring member accommodating portion 112 is provided on one side D11 in the first direction from the partition wall portion 111 and accommodates the wiring member 16. In other words, the partition wall portion 111 forms the bottom of the wiring member accommodating portion 112.

[0023] As shown in FIG. 3, the motor 1 has a bearing 17 such as a ball bearing. The bearing 17 rotatably supports the shaft 14. The bearing 17 is accommodated in a first case 11A of the motor case 11. Specifically, the partition wall portion 111 of the first case 11A has a shaft through hole 115, a bearing accommodating portion 114, and a resolver accommodating portion 113. The shaft through hole 115 penetrates the partition wall portion 111 in the first direction D1. The shaft 14 passes through the shaft through hole 115. The bearing accommodating portion 114 is connected to the other side D12 in the first direction of the shaft through hole 115. The other side D12 in the first direction is open in the bearing accommodating portion 114.

[0024] The resolver storage section 113 is connected to the first direction one side D11 of the shaft through hole 115. The resolver storage section 113 opens on the first direction one side D11. The resolver 15 is stored in the resolver storage section 113. For example, the resolver storage section 113 is a recess that is recessed from the surface of the first direction one side D11 of the partition wall section 111 to the first direction other side D12 along the shape of the resolver 15. That is, the resolver 15 is located inside the recess. In other words, the resolver storage section 113 in the partition wall section 111 covers the first direction other side D12 of the side surface section 15W along the circumferential direction D3 of the resolver 15 and the first direction other side D12 of the resolver 15. Therefore, foreign matter is less likely to enter the resolver 15 from the first direction other side D12, which is outside the side surface section 15W of the resolver 15.

[0025] Next, the wiring member 16 will be described with reference to Fig. 2 to Fig. 4. Fig. 4 is an exploded view of the inside of the first case 11A of the motor case 11. Fig. 4 shows the first case 11A as viewed from one side D11 in the first direction.

[0026] As shown in FIG. 2 to FIG. 4, the wiring member 16 has a wiring portion 161 and a cover portion 162. For example, the wiring portion 161 is a terminal block, and the conductive wires 20 and the like are wired. The cover portion 162 covers the resolver 15. The cover portion 162 is located on the opposite side of the wiring portion 161 with respect to the first direction D1. That is, the wiring portion 161 is located on the first direction one side D11 of the cover portion 162. Specifically, as shown in FIG. 3, the cover portion 162 has a first surface portion 162A and a second surface portion 162B. The first surface portion 162A covers the entire first direction one side D11 of the resolver 15. The second surface portion 162B covers the first direction one side D11 of the side surface portion 15W of the resolver 15. In other words, the cover portion 162 covers one side D11 in the first direction of the side portion 15W along the circumferential direction D3 of the resolver 15 and one side D11 in the first direction of the resolver 15. Details of the first surface portion 162A and the second surface portion 162B will be described later. Therefore, foreign matter is less likely to enter the resolver 15 from the one side D11 in the first direction, which is outside the side portion 15W of the resolver 15.

[0027] Next, the wiring of the conductive wires 20 in the wiring member 16 will be described with reference to Fig. 4 and Fig. 5. Fig. 5 is a diagram showing the wiring of the conductive wires 20 in the wiring member 16. Fig. 5 shows the wiring member accommodating portion 112 as viewed from one side D11 in the first direction.

[0028] 5, the wiring section 161 has three terminals 161a, 161b, and 161c. For example, the terminal 161a is connected to the power line 20U and a conductive cable (not shown) through which a U-phase current flows. The terminal 161b is connected to the power line 20V and a conductive cable (not shown) through which a U-phase current flows. The terminal 161c is connected to the power line 20W and a conductive cable (not shown) through which a W-phase current flows.

[0029] On the other hand, as shown in Figs. 4 and 5, the resolver 15 has a resolver rotor 15R and a resolver stator 15S. The resolver rotor 15R is attached to the shaft 14 and rotates together with the shaft 14. As an example, the resolver rotor 15R is an iron core. The resolver stator 15S is annular and disposed around the resolver rotor 15R. For example, the resolver stator 15S has a plurality of coils arranged in a line along a circumferential direction D3 of the resolver stator 15S.

[0030] The resolver stator 15S has a signal output unit 15L. The signal output unit 15L outputs an electric signal indicating the detection result by the resolver 15. Specifically, in the motor 1, the resolver rotor 15R rotates relative to the resolver stator 15S as the motor rotor 13 and the shaft 14 rotate. As a result, the reactance between the resolver rotor 15R, which is an iron core, and the coil of the resolver stator 15S changes, and an AC voltage corresponding to the change in reactance is output from the signal output unit 15L as the detection result.

[0031] For example, the signal output unit 15L has a connector terminal. The signal line 20L is electrically and physically connected to the connector terminal. The electric signal output from the signal output unit 15L is transmitted through the signal line 20L. The signal line 20L is not limited to being physically connected to the signal output unit 15L, and may be connected to the signal output unit 15L via the wiring unit 161. Specifically, a cable (not shown) connected to the connector terminal of the signal output unit 15L and the signal line 20L may be connected to a terminal of the wiring unit 161. In this case, the signal line 20L is an example of a conductive wire 20.

[0032] Next, the resolver 15 and the wiring member 16 will be described in more detail with reference to Fig. 4, Fig. 6, and Fig. 7. Fig. 6 is an exploded view of the first case 11A seen from an angle different from that of Fig. 4. Fig. 7 is a view showing the resolver 15 and the wiring member 16.

[0033] 6 and 7, the second surface portion 162B of the wiring member 16 is a wall extending from a surface of the wiring portion 161 on the other side D12 in the first direction toward the other side D12 in the first direction. The second surface portion 162B is disposed along the side surface portion 15W of the resolver stator 15S. For example, the second surface portion 162B contacts the side surface portion 15W. Therefore, the gap between the second surface portion 162B and the side surface portion 15W is reduced, and foreign matter is less likely to enter the resolver 15.

[0034] 7, the signal output portion 15L extends outside the resolver stator 15S. A part of the signal output portion 15L is located so as to be exposed to the outside from the side surface portion 15W. The second surface portion 162B has a notch 163 extending from an end portion on the other side D12 in the first direction to the one side D11 in the first direction. When the cover portion 162 covers the resolver 15, the signal output portion 15L of the resolver 15 is located in the notch 163 in the circumferential direction D3.

[0035] Therefore, even in a resolver 15 having a signal output portion 15L that is exposed to the outside from a side surface portion 15W, the side surface portion 15W can be covered by the second surface portion 162B excluding the notch 163, making it difficult for foreign matter to enter the resolver 15.

[0036] Next, with reference to FIGS. 4 and 7, the attachment of wiring member 16 to first case 11A will be described.

[0037] 4, 6, and 7, the first case 11A of the motor case 11 has a fixing member 18. The fixing member 18 fixes the resolver stator 15S to the partition wall portion 111. The fixing member 18 has an annular main body portion 18B and one or more protrusions 18C protruding in the radial direction D2 from the main body portion 18B toward the resolver stator 15S. The main body portion 18B is disposed outward in the radial direction D2 from the side surface portion 15W of the resolver stator 15S, and is attached to the partition wall portion 111 with screws or the like.

[0038] On the other hand, the second surface portion 162B of the wiring member 16 has recesses 164 corresponding to the protrusions 18C. Specifically, the second surface portion 162B is provided with the same number of recesses 164 as the protrusions 18C. The recesses 164 extend from an end of the second surface portion 162B on the other side D12 in the first direction to the one side D11 in the first direction. In this embodiment, the depth of the recesses 164 in the first direction D1 is shallower than the depth of the notch 163 in the first direction D1. Typically, the depth of the recesses 164 in the first direction D1 is the same as the length of the protrusions 18C in the first direction D1. Note that the depth of the recesses 164 in the first direction D1 may be greater than or equal to the depth of the notch 163 in the first direction D1.

[0039] In a state in which the cover portion 162 covers the resolver 15, the protrusion portion 18C of the fixing member 18 is located in the recessed portion 164 of the second surface portion 162B in the circumferential direction D3.

[0040] As a result, the wiring member 16 is positioned with respect to the fixed member 18 by the protrusion 18C and the recess 164. Furthermore, when the depth of the recess 164 in the first direction D1 and the length of the protrusion 18C in the first direction D1 are the same, the position of the wiring member 16 in the first direction D1 with respect to the fixed member 18 is determined. Therefore, the movement of the protrusion 18C along the first direction D1 and the circumferential direction D3 is restricted by the recess 164. Therefore, the resolver 15 is stably disposed between the wiring member 16 and the partition portion 111.

[0041] In this embodiment, typically, the wiring portion 161 and the cover portion 162 of the wiring member 16 are formed of a single member. This can reduce the number of accessories in the motor 1. However, the wiring portion 161 and the cover portion 162 may be separate components.

[0042] For example, an electromagnetic shielding member 165 is disposed between the wiring portion 161 and the cover portion 162. As an example, the electromagnetic shielding member 165 is a metal plate or a metal mesh. For example, as shown in FIG. 3, the electromagnetic shielding member 165 is embedded between the wiring portion 161 and the cover portion 162. Typically, the wiring member 16 is formed by insert molding a resin material into the electromagnetic shielding member 165. By disposing the electromagnetic shielding member 165 between the wiring portion 161 and the cover portion 162, it is possible to reduce the electromagnetic effect on the resolver 15 caused by a current flowing through the conductive wires 20 wired to the wiring portion 161.

[0043] 3, instead of the electromagnetic shielding member 165, an electromagnetic shielding member 166 may be disposed between the first surface portion 162A of the cover portion 162 and the resolver 15, in addition to between the wiring portion 161 and the cover portion 162. In other words, the electromagnetic shielding member 166 may be provided on the other first direction side D12 of the first surface portion 162A. Specifically, the electromagnetic shielding member 166 such as a metal plate may be attached to the surface of the other first direction side D12 of the first surface portion 162A.

[0044] [Variation 1] Next, a first modified example of the motor 1 of the exemplary embodiment will be described with reference to Fig. 8. Fig. 8 is a cross-sectional view of the first modified example of the motor 1 similar to Fig. 3.

[0045] Modification 1 of motor 1 is the same as motor 1 except that it has first case 11C instead of first case 11A.

[0046] The first case 11C has a partition wall portion 111A instead of the partition wall portion 111 of the first case 11A, and has a wiring member 16A instead of the wiring member 16. The partition wall portion 111A has a shaft through hole 115 and a bearing storage portion 114. In other words, the partition wall portion 111A is not provided with the resolver storage portion 113. On the other hand, the wiring member 16A has a cover portion 262 instead of the cover portion 162. The cover portion 262 has a second surface portion 262B instead of the second surface portion 162B of the cover portion 162. The second surface portion 262B covers the entire side surface portion 15W of the resolver 15 in the first direction D1.

[0047] [Variation 2] Next, a second modified example of the motor 1 of the exemplary embodiment will be described with reference to Fig. 9. Fig. 9 is a cross-sectional view of the second modified example of the motor 1 similar to Fig. 3.

[0048] Modification 2 of motor 1 is the same as motor 1 except that it has first case 11D instead of first case 11A.

[0049] The first case 11D has a partition wall portion 111B instead of the partition wall portion 111 of the first case 11A, and has a wiring member 16B instead of the wiring member 16. The partition wall portion 111B has a resolver storage portion 113A, a shaft through hole 115, and a bearing storage portion 114. The resolver storage portion 113A is the same as the resolver storage portion 113 except for the depth in the first direction D1. That is, the resolver storage portion 113A covers the entire side portion 15W of the resolver 15 in the first direction D1. On the other hand, the wiring member 16B has a cover portion 362 instead of the cover portion 162. The cover portion 362 has a first surface portion 162A. That is, the cover portion 362 does not have a second surface portion 162B.

[0050] In the second modification of the motor 1, the cover portion 362 may have a second surface portion 162B. In this case, the second surface portion 162B is located outside the side surface portion 15W of the resolver 15 in the radial direction D2 and inside the resolver storage portion 113A in the radial direction D2.

[0051] As shown in the first or second modification of the motor 1, the side surface portion 15W of the resolver 15 is covered by at least one of the partition wall portion 111 and the wiring member 16. Therefore, foreign matter is less likely to enter the resolver 15 from outside the resolver 15 in the radial direction D2.

[0052] The embodiments of the present disclosure have been described above with reference to the drawings. However, the present disclosure is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present disclosure. In addition, the components disclosed in the above embodiments can be modified as appropriate. For example, a certain component among all the components shown in one embodiment may be added to a component of another embodiment, or some components among all the components shown in one embodiment may be deleted from the embodiment.

[0053] In addition, the drawings are mainly schematic illustrations of each component to facilitate understanding of the disclosure, and the thickness, length, number, spacing, etc. of each illustrated component may differ from the actual ones due to the convenience of creating the drawings. In addition, the configurations of each component shown in the above embodiment are merely examples and are not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially deviate from the effects of the present disclosure.

[0054] The present technology can be configured as follows. (1) an annular motor stator having a central axis extending in a first direction; a motor rotor that faces the motor stator in a radial direction and rotates in a circumferential direction; a shaft attached to the motor rotor and extending in a first direction; a resolver attached to the shaft and configured to detect rotation of the motor rotor; A wiring member for wiring conductive wires; having the resolver is disposed on one side in a first direction with respect to the motor rotor, The wiring member is disposed on one side in a first direction with respect to the resolver, A motor, wherein the other side of the wiring member in the first direction covers at least the one side of the resolver in the first direction. (2) a bearing that rotatably supports the shaft; a motor case that accommodates the motor stator, the motor rotor, the shaft, the resolver, the wiring member, and the bearing; and the motor case has a partition wall portion that separates the motor rotor and the resolver, The partition wall portion is a shaft through hole through which the shaft passes; a bearing accommodating portion that is connected to the shaft through hole, that is open on the other side in the first direction, and that accommodates the bearing; having The motor according to (1), wherein at least one of the partition portion and the wiring member covers a circumferential side portion of the resolver. (3) The motor described in (2), wherein the partition portion is connected to the shaft through hole, is open on one side in a first direction, and has a resolver storage portion in which the resolver is stored. (4) The wiring member is a wiring portion in which the conductive line is wired; A cover portion for covering the resolver; having the wiring portion is disposed on one side in a first direction relative to the cover portion, The cover portion is A first surface portion covering one side of the resolver in a first direction; a second surface portion covering a circumferential side surface portion of the resolver; The motor according to claim 2 or 3, (5) The resolver comprises: a resolver rotor attached to the shaft and rotating together with the shaft; an annular resolver stator disposed around the resolver rotor; having The motor according to (4), wherein the second surface portion contacts a circumferential side surface portion of the resolver stator. (6) The resolver stator has a signal output unit that outputs an electric signal indicating a detection result by the resolver, The signal output portion extends outside the resolver stator, the second surface portion has a notch extending from an end portion on the other side in the first direction to the one side in the first direction, The motor according to (4) or (5), wherein the signal output portion is located in the notch. (7) The motor case further includes a fixing member that fixes the resolver stator to the partition wall, The fixing member is It is annular in shape, disposed radially outward from a circumferential side surface of the resolver stator; The resolver has one or more projections that project radially toward the resolver stator. the second surface portion has a recess corresponding to the protrusion portion, The motor according to (6), wherein the protrusion is located in the recess. (8) The motor according to any one of (4) to (7), wherein the wiring portion and the cover portion are formed from a single member. (9) The motor according to (8), wherein an electromagnetic shielding member is disposed between the wiring portion and the cover portion. [Industrial Applicability]

[0055] The present disclosure is applicable to the field of motors. [Explanation of symbols]

[0056] 1: Motor 11: Motor case 12: Motor stator 13: Motor rotor 14: Shaft 15: Resolver 15L: Signal output section 15R: Resolver rotor 15S: Resolver stator 15W: Side part 16, 16A, 16B: Wiring components 17: Bearings 18: Fixing member 18C:Protrusion 20: Conductive wire 111, 111A, 111B: Partition part 113, 113A: Resolver storage section 114: Bearing storage section 115: Shaft through hole 161:Wiring section 162, 262, 362: Cover part 162A: First surface part 162B, 262B: Second surface part 163: Notch 164: Recess 165: Electromagnetic shielding materials D1: 1st direction D11: One side in the first direction D12: 1st direction other side D2: Radial direction D3: Circumferential direction J: Central axis

Claims

1. an annular motor stator having a central axis extending in a first direction as a center; a motor rotor that faces the motor stator in a radial direction and rotates in a circumferential direction; a shaft attached to the motor rotor and extending in a first direction; a resolver attached to the shaft and configured to detect rotation of the motor rotor; A wiring member for wiring conductive wires; having the resolver is disposed on one side in a first direction with respect to the motor rotor, The wiring member is disposed on one side in a first direction with respect to the resolver, A motor, wherein the other side of the wiring member in the first direction covers at least the one side of the resolver in the first direction.

2. A bearing that rotatably supports the shaft; a motor case that accommodates the motor stator, the motor rotor, the shaft, the resolver, the wiring member, and the bearing; Further comprising: the motor case has a partition wall portion that separates the motor rotor and the resolver, The partition wall portion is a shaft through hole through which the shaft passes; a bearing accommodating portion that is connected to the shaft through hole, that is open on the other side in the first direction, and that accommodates the bearing; having The motor according to claim 1 , wherein at least one of the partition wall and the wiring member covers a circumferential side surface of the resolver.

3. The motor according to claim 2 , wherein the partition portion includes a resolver housing portion that is connected to the shaft through hole, that is open on one side in the first direction, and that houses the resolver.

4. The wiring member is a wiring portion in which the conductive line is wired; A cover portion for covering the resolver; having The wiring portion is disposed on one side in a first direction relative to the cover portion, The cover portion is A first surface portion covering one side of the resolver in a first direction; A second surface portion covering a circumferential side surface portion of the resolver; The motor of claim 2 .

5. The resolver includes: a resolver rotor attached to the shaft and rotating together with the shaft; an annular resolver stator disposed around the resolver rotor; having The motor according to claim 4 , wherein the second surface portion is in contact with a circumferential side surface portion of the resolver stator.

6. the resolver stator has a signal output unit that outputs an electric signal indicative of a detection result by the resolver, The signal output portion extends outside the resolver stator, the second surface portion has a notch extending from an end portion on the other side in the first direction to the one side in the first direction, The motor according to claim 5 , wherein the signal output portion is located in the notch.

7. the motor case further includes a fixing member that fixes the resolver stator to the partition wall, The fixing member is It is annular in shape, disposed radially outward from a circumferential side surface of the resolver stator; The resolver has one or more projections that project radially toward the resolver stator, The second surface portion has a recess corresponding to the protrusion portion, The motor of claim 6 , wherein the protrusion is located in the recess.

8. The motor according to claim 4 , wherein the wiring portion and the cover portion are formed from a single member.

9. The motor according to claim 8 , further comprising an electromagnetic shielding member disposed between the wiring portion and the cover portion.

Images