Motor

Abstract

A motor includes a motor stator, a motor rotor, a shaft, a resolver, and a wiring member. The motor stator has a ring shape centered on a central axis extending in a first direction. The motor rotor and the motor stator face each other in the radial direction and rotate in the 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 performs wiring on a conductive wire. 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 the first direction with respect to the resolver. The other side of the wiring member in the first direction covers at least one side of the resolver in the first direction.

Description

Technical Field

[0001] The present invention relates to a motor. Background Art

[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 in the motor cover; a motor stator provided on the motor yoke; and a rotary transformer for detecting the rotation angle of the motor rotor. In the electric motor of Patent Document 1, the rotary transformer is formed to include a rotary transformer rotor mounted on the shaft and a rotary transformer stator located at a position opposite to the rotary transformer rotor. In the electric motor of Patent Document 1, the rotary transformer stator is mounted and supported on the motor yoke by a support member made of a non-magnetic material.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2005-318745 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the electric motor of Patent Document 1, the resolver stator is mounted in the recessed space of the support member, and a rear cover is mounted to cover the support member. In this case, a space is formed between the resolver stator and the rear cover where foreign matter may enter the resolver rotor and resolver stator.

[0008] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a motor in which foreign matter is unlikely to enter a resolver.

[0009] Solutions to Solve Problems

[0010] An exemplary motor of the present invention has a motor stator, a motor rotor, a shaft, a rotary transformer and a wiring component. The motor stator is annular with a central axis extending in a first direction as the center. The motor rotor is radially opposite to the motor stator and rotates in a circumferential direction. The shaft is mounted on the motor rotor and extends in a first direction. The rotary transformer is mounted on the shaft and detects the rotation of the motor rotor. The wiring component wires the conductive wire. The rotary transformer is arranged on one side of the first direction relative to the motor rotor. The wiring component is arranged on one side of the first direction relative to the rotary transformer. The other side of the wiring component in the first direction at least covers one side of the rotary transformer in the first direction.

[0011] Effects of the Invention

[0012] According to the exemplary present invention, it is difficult for foreign matter to invade the rotary transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG. 1 is a diagram showing the appearance of a motor according to an exemplary embodiment.

[0014] Figure 2 is an exploded view showing the interior of a motor according to an exemplary embodiment.

[0015] Figure 3 is a cross-sectional view of a motor according to an exemplary embodiment.

[0016] Figure 4 It is an exploded view of the interior of the first housing in the motor housing.

[0017] Figure 5 It is a diagram showing the wiring of conductive lines in a wiring member.

[0018] Figure 6 It is from Figure 4 Exploded views of the first housing viewed from different angles.

[0019] Figure 7 It is a diagram showing the resolver 15 and the wiring member 16 .

[0020] Figure 8 The motor of the exemplary embodiment is modified example 1 and Figure 3 Same cross-section view.

[0021] Fig. 9 The motor of the exemplary embodiment is modified as follows: Figure 3 Same cross-section view.

[0022] In the figure:

[0023] 1—motor, 11—motor housing, 12—motor stator, 13—motor rotor, 14—shaft, 15—revolving transformer, 15L—signal output portion, 15R—revolving transformer rotor, 15S—revolving transformer stator, 15W—side portion, 16, 16A, 16B—wiring component, 17—bearing, 18—fixing component, 18C—protrusion, 20—conductive wire, 111, 111A, 111B—partition wall portion, 113, 114, 115 3A—rotating transformer storage portion, 114—bearing storage portion, 115—shaft through hole, 161—wiring portion, 162, 262, 362—cover portion, 162A—first face portion, 162B, 262B—second face portion, 163—cutout, 164—recess, 165—electromagnetic shielding component, D1—first direction, D11—one side of the first direction, D12—the other side of the first direction, D2—radial direction, D3—circumferential direction, J—center axis. DETAILED DESCRIPTION

[0024] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in the drawings, the same reference symbols are marked for the same or corresponding parts, and the description will not be repeated. In this specification, for easy understanding, the central axis direction substantially parallel to the rotation axis of the motor is recorded as the first direction D1, one side of the first direction D1 is recorded as the first direction one side D11, and the other side of the first direction D1 is recorded as the first direction other side D12. In addition, the radial direction centered on the rotation axis of the motor is recorded as the radial direction D2, and the circumferential direction centered on the rotation axis of the motor is recorded as the circumferential direction D3. However, the directions are defined only for the convenience of explanation, and the orientation of the motor of the present invention when in use is not limited, except for the case where the horizontal direction and the vertical direction need to be specifically defined. In addition, in the present application, "orthogonal directions" also include substantially orthogonal directions.

[0025] Reference Figure 1 and Figure 2 , a motor 1 according to an exemplary embodiment will be described. Figure 1 1 is a diagram showing the appearance of a motor 1 according to an exemplary embodiment. Figure 2 1 is an exploded view showing the interior of the motor 1 according to the exemplary embodiment. Figure 2 Omitted Figure 1 Components of a portion of the motor 1 are shown.

[0026] As an example, the motor 1 is used as a driving force source for wheels of a small four-wheeled vehicle.

[0027] like Figure 1 and Figure 2 As shown, 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 .

[0028] The motor stator 12 has an annular shape centered on a central axis J extending in the first direction D1. The motor stator 12 includes an annular or cylindrical stator core (not shown) and a coil (not shown) wound around the stator core.

[0029] The motor rotor 13 is opposed to the motor stator 12 in the radial direction D2. In the present embodiment, the motor rotor 13 is located on the inner side of the motor stator 12 in the radial direction D2. The motor rotor 13 has a yoke (not shown) and a magnet (not shown) disposed on the yoke. The motor rotor 13 rotates in the circumferential direction D3 relative to the motor stator 12 about the central axis J through the interaction between the coil (not shown) and the magnet (not shown). That is, in the present embodiment, the motor 1 is an inner rotor type motor. However, the motor 1 may also be an outer rotor type motor in which the motor rotor 13 is located on the outer side of the motor stator 12 in the radial direction D2.

[0030] The motor rotor 13 is provided with a shaft 14 extending in the first direction D1 . The shaft 14 coincides with the central axis J. In other words, the shaft 14 is a rotation axis of the motor rotor 13 .

[0031] In addition, a resolver 15 is mounted on 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 processing in the resolver 15 will be described later. For example, the resolver 15 is arranged on one side D11 in the first direction with respect to the motor rotor 13. Specifically, the resolver 15 is mounted on the end of the shaft 14 on one side D11 in the first direction.

[0032] The motor 1 is connected to a conductive wire 20 electrically connected to the outside, for example. As an example, the conductive wire 20 includes power lines 20U, 20V, and 20W through which three-phase alternating current flows, and a signal line 20L through which an electric signal flows. The power lines 20U, 20V, and 20W are conductive wires electrically connected to the coils of the motor stator 12, and various methods such as lead wires, metal bus bars, terminals, and conductive wires composed of these can be considered. In the present embodiment, the power lines 20U, 20V, and 20W are provided with two conductive wires having metal rods (terminals) connected to the leads. One wire is wired from the motor housing 11 to the outside and is connected to an external power source such as an inverter. The terminal of the other wire is connected to a coil end wire (not shown) extending from the coil of the motor stator 12.

[0033] 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.

[0034] The wiring member 16 is arranged on the first direction one side D11 relative 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 at least covers the first direction one side D11 of the resolver 15. Therefore, it is difficult for foreign matter to at least penetrate into the resolver 15 from the first direction one side D11 of the resolver 15.

[0035] Next, refer to Figure 1 to Figure 3 , the motor housing 11 will be described. Figure 3 is a cross-sectional view of the motor 1 . Figure 3 denoted a cross section passing through the central axis J and along the first direction D1 and the radial direction D2.

[0036] The motor housing 11 accommodates the motor stator 12, the motor rotor 13, the shaft 14, the rotary transformer 15, and the wiring component 16. Specifically, the motor housing 11 includes a first housing 11A and a second housing 11B connected to each other in the first direction D1. The first housing 11A accommodates the rotary transformer 15, the wiring component 16, and a portion of the shaft 14 on one side D11 in the first direction. The second housing 11B accommodates the motor stator 12, the motor rotor 13, and a portion of the shaft 14 on the other side D12 in the first direction.

[0037] As an example, the second housing 11B is a cylindrical shape along the outer shape of the motor stator 12. A partition wall 111 is provided between the first housing 11A and the second housing 11B to separate the motor rotor 13 and the rotary transformer 15. For example, the first housing 11A of the motor housing 11 has a partition wall 111 and a wiring component storage portion 112. The wiring component storage portion 112 is provided on one side D11 in the first direction relative to the partition wall 111, and stores the wiring component 16. In other words, the partition wall 111 constitutes the bottom of the wiring component storage portion 112.

[0038] like Figure 3 As shown, the motor 1 has a bearing 17 such as a ball bearing. The bearing 17 rotatably supports the shaft 14. The bearing 17 is housed in the first housing 11A of the motor housing 11. Specifically, the partition wall 111 of the first housing 11A has a shaft through hole 115, a bearing housing 114, and a rotary transformer housing 113. The shaft through hole 115 penetrates the partition wall 111 in the first direction D1. The shaft 14 passes through the shaft through hole 115. The bearing housing 114 is connected to the other side D12 of the first direction of the shaft through hole 115. In the bearing housing 114, the other side D12 of the first direction is open.

[0039] The rotary transformer storage portion 113 is connected to the first direction one side D11 of the shaft through hole 115. The first direction one side D11 of the rotary transformer storage portion 113 is open. The rotary transformer 15 is stored in the rotary transformer storage portion 113. For example, the rotary transformer storage portion 113 is a recessed portion that is recessed from the surface of the first direction one side D11 of the partition portion 111 toward the first direction other side D12 along the shape of the rotary transformer 15. That is, the rotary transformer 15 is located on the inner side of the recessed portion. In other words, the rotary transformer storage portion 113 of the partition portion 111 covers the first direction other side D12 of the side portion 15W along the circumferential direction D3 of the rotary transformer 15 and the first direction other side D12 of the rotary transformer 15. Therefore, it is difficult for foreign matter to invade the rotary transformer 15 from the outside of the side portion 15W of the rotary transformer 15 and the first direction other side D12.

[0040] Next, refer to Figure 2 to Figure 4 , the wiring component 16 is described. Figure 4 1 is an exploded view of the interior of the first housing 11A in the motor housing 11 . Figure 4 The first housing 11A is shown as viewed from the first direction one side D11 .

[0041] like Figure 2 to Figure 4 As shown, the wiring component 16 has a wiring portion 161 and a cover portion 162. For example, the wiring portion 161 is a terminal block for wiring the conductive wire 20 and the like. The cover portion 162 covers the rotary transformer 15. In the first direction D1, the cover portion 162 is located on the opposite side of the wiring portion 161. That is, the wiring portion 161 is arranged on the first direction side D11 relative to the cover portion 162. Specifically, as shown in FIG. Figure 3 As shown, the cover portion 162 has a first face portion 162A and a second face portion 162B. The first face portion 162A covers the entire first direction one side D11 of the rotary transformer 15. The second face portion 162B covers the first direction one side D11 of the side portion 15W of the rotary transformer 15. In other words, the cover portion 162 covers the first direction one side D11 of the side portion 15W along the circumferential direction D3 of the rotary transformer 15 and the first direction one side D11 of the rotary transformer 15. The details of the first face portion 162A and the second face portion 162B will be described later. Therefore, it is difficult for foreign matter to invade the rotary transformer 15 from the outside of the side portion 15W of the rotary transformer 15 and the first direction one side D11.

[0042] Next, refer to Figure 4 and Figure 5 , the wiring of the conductive wires 20 in the wiring component 16 will be described. Figure 5 It is a diagram showing the wiring of the conductive wires 20 of the wiring member 16 . Figure 5 The state where the wiring member housing portion 112 is viewed from the one side D11 in the first direction is shown.

[0043] like Figure 5 As shown, the wiring unit 161 has three terminals 161a, 161b, and 161c. For example, the power line 20U and the conductive cable (not shown) through which the current of the U phase flows are connected to the terminal 161a. The power line 20V and the conductive cable (not shown) through which the current of the U phase flows are connected to the terminal 161b. The power line 20W and the conductive cable (not shown) through which the current of the W phase flows are connected to the terminal 161c.

[0044] On the other hand, Figure 4 and Figure 5As shown, the resolver 15 includes a resolver rotor 15R and a resolver stator 15S. The resolver rotor 15R is mounted on 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 is arranged around the resolver rotor 15R. For example, in the resolver stator 15S, a plurality of coils are arranged along the circumferential direction D3 of the resolver stator 15S.

[0045] The resolver stator 15S has a signal output unit 15L. The signal output unit 15L outputs an electrical signal indicating the detection result of 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 as the core part 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.

[0046] 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 electrical signal output from the signal output unit 15L is transmitted in the signal line 20L. In addition, the signal line 20L is not limited to a structure physically connected to the signal output unit 15L, and may be connected to the signal output unit 15L via the wiring unit 161. Specifically, it may be configured such that a cable (not shown) connected to the connector terminal of the signal output unit 15L and the signal line 20L are connected to the terminal of the wiring unit 161. In this case, the signal line 20L is an example of the conductive line 20.

[0047] Next, refer to Figure 4 , Figure 6 as well as Figure 7 , the resolver 15 and the wiring component 16 will be described in more detail. Figure 6 It is from Figure 4 Exploded views of the first housing 11A viewed from different angles. Figure 7 It is a diagram showing the resolver 15 and the wiring member 16 .

[0048] like Figure 6 and Figure 7 As shown, the second face portion 162B of the wiring component 16 is a wall extending from the face 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 face portion 162B is arranged along the side portion 15W of the rotary transformer stator 15S. For example, the second face portion 162B contacts the side portion 15W. Therefore, the gap between the second face portion 162B and the side portion 15W becomes smaller, and foreign matter is difficult to enter the rotary transformer 15.

[0049] like Figure 7 As shown, the signal output portion 15L extends to the outside of the resolver stator 15S. A portion of the signal output portion 15L is located at a position exposed to the outside from the side portion 15W. The second surface portion 162B has a cutout 163 extending from the end portion of 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 cutout 163 in the circumferential direction D3.

[0050] Therefore, even in resolver 15 having signal output portion 15L located at a position exposed to the outside from side surface portion 15W, side surface portion 15W can be covered by second surface portion 162B excluding cutout 163 , and foreign matter is unlikely to enter resolver 15 .

[0051] Next, refer to Figure 4 and Figure 7 Attachment of the wiring component 16 to the first housing 11A will be described.

[0052] like Figure 4 , Figure 6 as well as Figure 7 As shown, the first housing 11A of the motor housing 11 has a fixing member 18. The fixing member 18 fixes the resolver stator 15S to the partition wall 111. The fixing member 18 has an annular main body 18B and one or more protrusions 18C protruding from the main body 18B toward the resolver stator 15S in the radial direction D2. The main body 18B is arranged on the outer side of the side surface 15W of the resolver stator 15S in the radial direction D2, and is mounted on the partition wall 111 by a small screw or the like.

[0053] On the other hand, the second face 162B of the wiring component 16 has a recess 164 corresponding to the protrusion 18C. Specifically, the second face 162B is provided with the same number of recesses 164 as the protrusion 18C. The recess 164 extends from the end of the second face 162B on the other side D12 of the first direction to the one side D11 of the first direction. In the present embodiment, the depth of the recess 164 in the first direction D1 is shallower than the depth of the cutout 163 in the first direction D1. Typically, the depth of the recess 164 in the first direction D1 is the same as the length of the protrusion 18C in the first direction D1. In addition, the depth of the recess 164 in the first direction D1 may be greater than the depth of the cutout 163 in the first direction D1.

[0054] In a state where the cover portion 162 covers the resolver 15 , the protrusion 18C of the fixing member 18 is located in the recess 164 of the second surface portion 162B in the circumferential direction D3 .

[0055] As a result, the wiring member 16 is positioned relative to the fixing member 18 by the protrusion 18C and the recess 164. In addition, when the depth of the first direction D1 of the recess 164 and the length of the first direction D1 of the protrusion 18C are equal, the position of the wiring member 16 in the first direction D1 relative to the fixing member 18 is positioned. Therefore, the movement of the protrusion 18C in the first direction D1 and the circumferential direction D3 is restricted by the recess 164. Therefore, the resolver 15 is stably arranged between the wiring member 16 and the partition wall 111.

[0056] In this embodiment, the wiring portion 161 and the cover portion 162 of the wiring member 16 are typically formed of a single component. This can reduce the number of parts in the motor 1. However, the wiring portion 161 and the cover portion 162 may be separate components.

[0057] 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. Figure 3 As shown, 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 with respect to the electromagnetic shielding member 165. By arranging the electromagnetic shielding member 165 between the wiring portion 161 and the cover portion 162, the electromagnetic influence on the rotary transformer 15 caused by the current flowing through the conductive wire 20 wired to the wiring portion 161 can be reduced.

[0058] In addition, if Figure 3 As shown by the middle dotted line, an electromagnetic shielding member 166 may be arranged between the first face portion 162A of the cover portion 162 and the rotary transformer 15 instead of the electromagnetic shielding member 165, 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 first direction other side D12 of the first face portion 162A. Specifically, the electromagnetic shielding member 166 such as a metal plate may be attached to the surface of the first direction other side D12 of the first face portion 162A.

[0059] [Modification 1]

[0060] Next, refer to Figure 8 , Modification 1 of the motor 1 according to the exemplary embodiment will be described. Figure 8 is a modification 1 of the motor 1 and Figure 3 Same cross-section view.

[0061] Modification 1 of the motor 1 is the same as the motor 1 except that it includes a first housing 11C instead of the first housing 11A.

[0062] The first housing 11C has a partition wall portion 111A instead of the partition wall portion 111 of the first housing 11A, and has a wiring component 16A instead of the wiring component 16. The partition wall portion 111A has a shaft through hole 115 and a bearing receiving portion 114. That is, the rotary transformer receiving portion 113 is not provided in the partition wall portion 111A. On the other hand, the wiring component 16A has a cover portion 262 instead of the cover portion 162. The cover portion 262 has a second face portion 262B instead of the second face portion 162B of the cover portion 162. The second face portion 262B covers the entire side portion 15W of the rotary transformer 15 in the first direction D1.

[0063] [Modification 2]

[0064] Next, refer to Fig. 9 , a modification 2 of the motor 1 according to the exemplary embodiment will be described. Fig. 9 is a modification 2 of motor 1 and Figure 3 Same cross-section view.

[0065] Modification 2 of the motor 1 is the same as the motor 1 except that it includes a first housing 11D instead of the first housing 11A.

[0066] The first housing 11D has a partition wall portion 111B instead of the partition wall portion 111 of the first housing 11A, and has a wiring component 16B instead of the wiring component 16. The partition wall portion 111B has a rotary transformer storage portion 113A, a shaft through hole 115, and a bearing storage portion 114. The rotary transformer storage portion 113A is the same as the rotary transformer storage portion 113 except that the depth in the first direction D1 is different. That is, the rotary transformer storage portion 113A covers the entire side surface portion 15W of the rotary transformer 15 in the first direction D1. On the other hand, the wiring component 16B has a cover portion 362 instead of the cover portion 162. The cover portion 362 has a first face portion 162A. That is, the cover portion 362 is not provided with a second face portion 162B.

[0067] In the second modification of the motor 1 , the cover portion 362 may include the 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 housing portion 113A in the radial direction D2.

[0068] As shown in Modification 1 or Modification 2 of motor 1, side surface 15W of resolver 15 is covered by at least one of partition wall 111 and wiring member 16. Therefore, foreign matter is unlikely to enter resolver 15 from the outside in radial direction D2.

[0069] The embodiments of the present invention are described above with reference to the accompanying drawings. However, the present invention is not limited to the above-mentioned embodiments and can be implemented in various ways without departing from the scope of the present invention. In addition, the multiple components disclosed in the above-mentioned embodiments can be appropriately changed. For example, a certain component of all the components shown in a certain embodiment can be added to the components of other embodiments, or several components of all the components shown in a certain embodiment can be deleted from the embodiment.

[0070] In addition, in order to make the invention easy to understand, the drawings are schematically shown with each component as the main body, and for the convenience of drawing, the thickness, length, number, spacing, etc. of each component shown in the drawings are sometimes different from the actual ones. In addition, the structure of each component shown in the above-mentioned embodiment is an example and is not particularly limited. Various changes can be made within the scope of not substantially departing from the effect of the present invention.

[0071] Furthermore, the present technology can adopt the following structures.

[0072] (1) A motor comprising:

[0073] a ring-shaped motor stator centered on a central axis extending in a first direction;

[0074] a motor rotor, which is radially opposed to the motor stator and rotates in the circumferential direction;

[0075] A shaft, which is mounted on the motor rotor and extends along a first direction;

[0076] a rotary transformer mounted on the shaft and detecting the rotation of the motor rotor; and

[0077] a wiring component for wiring the conductive wires;

[0078] The rotary transformer is arranged on one side of the motor rotor in the first direction.

[0079] The wiring member is arranged on one side of the rotary transformer in the first direction.

[0080] The second side in the first direction of the wiring member covers at least the first side in the first direction of the resolver.

[0081] (2) A motor according to (1), wherein:

[0082] Also features:

[0083] a bearing that rotatably supports the shaft; and

[0084] a motor housing that accommodates the motor stator, the motor rotor, the shaft, the rotary transformer, the wiring component, and the bearing,

[0085] The motor housing has a partition wall portion that separates the motor rotor from the rotary transformer.

[0086] The partition wall has:

[0087] a shaft through-hole through which the shaft passes; and

[0088] A bearing receiving portion connected to the shaft through hole, opening in the first direction to the other side and receiving the bearing,

[0089] At least one of the partition wall portion and the wiring member covers a circumferential side surface portion of the resolver.

[0090] (3) The motor according to (2), wherein:

[0091] The partition wall portion includes a resolver housing portion that is connected to the shaft through hole, is open on one side in the first direction, and houses the resolver.

[0092] (4) The motor according to (2) or (3), wherein:

[0093] The wiring component has:

[0094] a wiring section for wiring the conductive wires; and

[0095] a cover portion, which covers the rotary transformer,

[0096] The wiring portion is arranged on one side of the cover portion in the first direction.

[0097] The cover has:

[0098] A first surface portion covering one side of the rotary transformer in a first direction; and

[0099] The second surface portion covers a circumferential side surface portion of the resolver.

[0100] (5) A motor according to (4), wherein:

[0101] The rotary transformer has:

[0102] a rotary transformer rotor mounted on the shaft and rotating together with the shaft; and

[0103] The annular rotary transformer stator is arranged around the rotary transformer rotor.

[0104] The second surface portion is in contact with a circumferential side surface portion of the resolver stator.

[0105] (6) The motor according to (4) or (5), wherein:

[0106] The resolver stator has a signal output unit that outputs an electrical signal indicating a detection result of the resolver.

[0107] The signal output portion extends to the outside of the rotary transformer stator.

[0108] The second surface portion has a cutout extending from an end portion on the other side in the first direction to one side in the first direction.

[0109] The signal output portion is located at the cutout.

[0110] (7) A motor according to (6), wherein:

[0111] The motor housing further includes a fixing member for fixing the rotary transformer stator to the partition wall portion.

[0112] The fixing member is annular in shape, is arranged radially outward from the circumferential side surface of the rotary transformer stator, and has one or more protrusions protruding radially toward the rotary transformer stator.

[0113] The second surface portion has a recess corresponding to the protrusion.

[0114] The protrusion is located in the recess.

[0115] (8) The motor according to any one of (4) to (7), wherein:

[0116] The wiring portion and the cover portion are formed of a single member.

[0117] (9) A motor according to (8), wherein:

[0118] An electromagnetic shielding member is disposed between the wiring portion and the cover portion.

[0119] Availability in production

[0120] The present invention can be used in the field of motors.

Claims

1. A motor, characterized in that: have: a ring-shaped motor stator centered on a central axis extending in a first direction; a motor rotor, which is radially opposed to the motor stator and rotates in a circumferential direction; a shaft mounted on the motor rotor and extending along a first direction; a rotary transformer mounted on the shaft and detecting rotation of the motor rotor; as well as a wiring component for wiring the conductive wires; The rotary transformer is arranged on one side of the motor rotor in the first direction, The wiring member is arranged on one side of the rotary transformer in the first direction. The second side of the wiring member in the first direction covers at least the first side of the resolver.

2. The motor according to claim 1, characterized in that Also features: a bearing that rotatably supports the shaft; and a motor housing that accommodates the motor stator, the motor rotor, the shaft, the resolver, the wiring component, and the bearing, The motor housing has a partition wall portion that separates the motor rotor from the resolver. The partition wall has: A shaft through-hole through which the shaft passes; and a bearing receiving portion connected to the shaft through hole, opening in the first direction to the other side, and receiving the bearing; At least one of the partition wall portion and the wiring member covers a circumferential side surface portion of the resolver.

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

4. The motor according to claim 2, characterized in that The wiring component has: a wiring section that wires the conductive wires; and a cover portion covering the rotary transformer, The wiring portion is arranged on one side of the cover portion in the first direction, The cover portion has: A first surface portion covering one side of the rotary transformer in a first direction; and The second surface portion covers a circumferential side surface portion of the resolver.

5. The motor according to claim 4, characterized in that The rotary transformer has: a resolver rotor mounted on the shaft and rotating together with the shaft; and a ring-shaped rotary transformer stator, which is arranged around the rotary transformer rotor, The second surface portion is in contact with a circumferential side surface portion of the resolver stator.

6. The motor according to claim 5, characterized in that The resolver stator has a signal output unit that outputs an electrical signal indicating a detection result of the resolver. The signal output portion extends to the outside of the rotary transformer stator, The second surface portion has a cutout extending from an end portion on the other side in the first direction to one side in the first direction, The signal output portion is located at the cutout.

7. The motor according to claim 6, characterized in that The motor housing further includes a fixing member for fixing the resolver stator to the partition wall portion. The fixing member is annular in shape, is arranged radially outward of a circumferential side surface of the resolver stator, and has one or more protrusions protruding radially toward the resolver stator. The second surface portion has a recessed portion corresponding to the protruding portion, The protrusion is located in the recess.

8. The motor according to any one of claims 4 to 7, characterized in that: The wiring portion and the cover portion are formed of a single member.

9. The motor according to claim 8, characterized in that An electromagnetic shielding member is disposed between the wiring portion and the cover portion.

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