Resolver stator and resolver

Abstract

To provide a resolver stator and a resolver, capable of improving the accuracy of electric connection between terminals in a terminal block part.SOLUTION: A terminal block part 7 of a resolver stator 2 includes: a first terminal 13 to which a winding 22 is connected; and a second terminal 16 to which a lead wire 17 is electrically connected. The first terminal 13 has an L-shaped structure including an engaging part 131 to which an end portion of the winding 22 is bound, and a first connection part 132 that extends in a direction crossing the engaging part 131 from the engaging part 131. The second terminal 16 also has an L-shaped structure including a lead wire connection part 161 to which the lead wire 17 is connected, and a second connection part 162 that extends in a direction crossing the engaging part 131 from the lead wire connection part 161 and is connected to the first connection part 132. The lead wire 17 and the lead wire connection part 161 are arranged to run along each other.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates generally to resolver stators and resolvers, and more particularly to a resolver stator having a terminal block and a resolver including a resolver stator. [Background technology]

[0002] The resolver terminal connection structure described in Patent Document 1 has a terminal provided at the tip of a lead wire and a terminal block portion extending from a entanglement portion provided on a stator core. The terminal is electrically connected to the terminal block portion in a state where the terminal is pressed against the terminal block portion in the axial direction of the stator core. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-146367 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the resolver terminal connection structure described in Patent Document 1, only the point-like tip of the terminal is pressed against the terminal block. In other words, the contact area between the terminals is small, and therefore the reliability of the terminal connection structure is low. The structure is particularly vulnerable to vibration.

[0005] An object of the present disclosure is to provide a resolver stator and a resolver that can improve the accuracy of electrical connection between terminals in a terminal block portion. [Means for solving the problem]

[0006] A resolver stator according to an embodiment of the present disclosure includes a stator core, a winding, and a terminal block. The stator core has an annular main body and a plurality of teeth arranged along the circumferential direction of the main body and extending in the radial direction of the main body. The winding is wound around the plurality of teeth to form a plurality of coils. The terminal block has a first terminal to which the winding is connected and a second terminal to which a lead wire is electrically connected. The first terminal has a entanglement portion to which an end of the winding is entangled, and a first connection portion extending from the entanglement portion in a direction intersecting the entanglement portion. The first terminal is L-shaped. The second terminal has a lead wire connection portion to which the lead wire is connected, and a second connection portion extending from the lead wire connection portion in a direction intersecting the entanglement portion and connected to the first connection portion. The second terminal is L-shaped. The lead wire and the lead wire connection portion are arranged to be aligned with each other.

[0007] A resolver according to one aspect of the present disclosure includes the resolver stator and a resolver rotor. Effect of the Invention

[0008] According to the present disclosure, a resolver stator and a resolver are obtained that can improve the accuracy of electrical connection between terminals in a terminal block portion. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a plan view of a resolver according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view of the resolver stator of the above embodiment. [Diagram 3] FIG. 3 is a perspective view of a terminal block portion of the resolver stator of the above embodiment. [Figure 4] FIG. 4 is an exploded perspective view of the terminal block portion of the above. [Diagram 5] FIG. 5 is a plan view of the terminal block of the above. [Figure 6] FIG. 6 is a cross-sectional view of the terminal block portion of the above. [Figure 7]FIG. 7 is a front view of the lead wire holding member and the lead wire of the terminal block portion. [Figure 8] FIG. 8 is a cross-sectional view of the lead wire holding member and the lead wire. [Figure 9] FIG. 9 is a perspective view of the lead wire holding member. [Figure 10] FIG. 10 is a perspective view of the lead wire holding member and the lead wire. [Figure 11] FIG. 11 is a perspective view showing a first stage of an assembly operation of the terminal block portion of the above. [Figure 12] FIG. 12 is a perspective view showing a second stage of the assembly operation of the terminal block portion. [Figure 13] FIG. 13 is a cross-sectional view showing a third stage of the assembly operation of the terminal block portion of the above. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (First embodiment) (1) Overall structure of resolver 1 to 8, the resolver 1 will be described. The resolver 1 is, for example, a sensor that detects the rotational position of a motor shaft (not shown) of an in-vehicle motor. Specifically, the resolver 1 is a VR (Variable Reluctance) type resolver.

[0011] The resolver 1 has a resolver stator 2 and a resolver rotor 3. The resolver stator 2 is fixed to, for example, a casing (not shown) of a motor (not shown). The resolver rotor 3 is fixed to, for example, an output shaft (not shown) of the motor. Note that the direction in which the rotation axis X1 of the resolver rotor 3 extends is defined as the axial direction A1, and the direction in which the resolver rotor 3 rotates is defined as the circumferential direction C1. For convenience, the upper side of FIGS. 2 to 4 is defined as the upper side in the axial direction A1, and the lower side of FIGS. 2 to 4 is defined as the lower side in the axial direction A1.

[0012] (2) Resolver rotor The resolver rotor 3 includes electromagnetic steel plates laminated in the axial direction A1. The resolver rotor 3 is formed in an annular shape centered on the rotation axis X1 of the resolver rotor 3. The outer peripheral shape of the resolver rotor 3 is a wave shape that changes the gap with the resolver stator 2.

[0013] (3) Resolver stator The resolver stator 2 is disposed on the outer periphery of the resolver rotor 3. The resolver stator 2 is formed in an annular shape centered on the rotation axis X1 of the resolver rotor 3. The resolver stator 2 has a stator core 21 and a plurality of windings 22. The stator core 21 includes electromagnetic steel plates laminated in the axial direction A1. The stator core 21 has an annular main body 211 and a plurality of teeth 212 disposed along the circumferential direction C1 of the main body 211 and extending radially inward from the main body 211.

[0014] 3, the stator core 21 further includes an insulator 213 that covers the multiple teeth 212. The insulator 213 is an insulating body attached so as to cover the outer circumferential surfaces of the teeth 212. The insulator 213 is integrally molded with the multiple teeth 212. This allows the multiple teeth 212 to be insulated without increasing the volume of the component.

[0015] A plurality of windings 22 are wound around each of the teeth 212 from above the insulator 213, thereby forming a plurality of coils 25.

[0016] The resolver stator 2 further includes a terminal block 7 to which a plurality of lead wires 17 are connected.

[0017] (4) Basic operation of resolver In the resolver 1, the resolver rotor 3 is rotated relative to the resolver stator 2, thereby periodically changing the gap between them. At this time, the rotation angle of the output shaft of the motor to which the resolver rotor 3 is attached is detected based on the change in the gap. For example, while the output shaft is rotating, a magnetic field is formed by passing a current through the coil 25 wound around the resolver stator 2. Therefore, the rotation angle of the output shaft can be detected by detecting the change in the magnetic flux at that time. Then, the resolver 1 outputs a rotation angle signal to a control device (not shown). As a result, the control device controls the rotation of the motor based on the output rotation angle signal.

[0018] (5) Terminal block section (5-1) Basic structure of the terminal block The resolver stator 2 further includes a terminal block 7. The terminal block 7 is configured to electrically connect the windings 22 and the lead wires 17. The terminal block 7 is disposed radially inward from the outer circumferential edge 214 of the main body 211.

[0019] The terminal block portion 7 mainly includes a terminal structure 11 and a lead wire holding member 12 connected to the terminal structure 11.

[0020] (5-2) Terminal structure The terminal structure 11 is an insulating member, and is formed, for example, by injection molding of an insulating resin. The terminal structure 11 holds a plurality of (six in the embodiment) first terminals 13. The first terminals 13 are conductive members such as metal. As shown in FIG. 6, the first terminal 13 is L-shaped and has a winding portion 131 around which the end of the winding 22 is wound, and a first connection portion 132 extending perpendicularly from the winding portion 131. Note that "perpendicular" includes a range of 90 degrees ± 5 degrees. The winding portion 131 is rod-shaped, and the first connection portion 132 is flat. The winding portion 131 protrudes from the main surface of the terminal structure 11 to one side in the axial direction A1, and functions as a winding connection portion. As shown in FIG. 6, the first connection portion 132 extends so as to be close to a member insertion portion 111 (described later) formed on the axial upper surface of the terminal block portion 7.

[0021] The member insertion portion 111 is a recess provided in the terminal structure 11 and into which the lead wire holding member 12 is inserted. The member insertion portion 111 is a recess facing axially upward, and has a bottom surface having a predetermined shape (for example, rectangular). The member insertion portion 111 has a shape into which the lead wire holding member 12 can be fitted.

[0022] (5-3) Lead wire holding member The lead wire holding member 12 has a main body 15. The main body 15 holds a plurality of lead wires 17 and a plurality of second terminals 16. As shown in Figs. 7 and 8, the main body 15 is substantially rectangular parallelepiped-shaped, and has a plurality of grooves 152 (six in this embodiment) formed side by side in the same direction. The lead wire holding member 12 can hold the plurality of lead wires 17 collectively by inserting the lead wires 17 into the grooves 152.

[0023] The lead wire holding member 12 also has a plurality of (six in this embodiment) conductive second terminals 16. The second terminals 16 are L-shaped and have a lead wire connecting portion 161 to which the lead wire 17 is connected, and a second connecting portion 162 that extends perpendicularly from the lead wire connecting portion 161 and is connected to the first connecting portion 132. The second terminals 16 are integrally formed with the main body 15, and the lead wire connecting portion 161 protrudes in the axial direction A1 of the main body 211. The lead wire connecting portion 161 and the second connecting portion 162 are flat plate-shaped.

[0024] The plurality of lead wires 17 are electric wires for electrically connecting an external device and the plurality of second terminals 16. The lead wires 17 have a coating portion 171 and a conductor 172. The coating portion 171 is an insulating member having electrical insulation properties such as vinyl resin, and covers the outer circumference of the conductor 172. One end of the lead wire 17 is inserted into a groove 152 of the main body portion 15 of the lead wire holding member 12 and electrically connected to the lead wire connection portion 161 of the plurality of second terminals 16. The lead wires 17 and the lead wire connection portion 161 are arranged along each other and in contact with each other. Specifically, the lead wires 17 and the lead wire connection portion 161 are arranged parallel to each other. More specifically, one end of the lead wire 17 is connected to the lead wire connection portion 161 of the second terminal 16 with the coating portion 171 being stripped to expose the conductor 172. Conductor 172 of lead wire 17 and second connection portion 162 of second terminal 16 are welded to each other at welded portion 174 (FIG. 8). In this manner, the joint strength between second terminal 16 and lead wire 17 can be improved and the contact resistance can be reduced. Note that "parallel" in this specification is not limited to completely parallel, and the angle between the two may be within a range of ±5°.

[0025] As shown in FIG. 8, the conductor 172 of the lead wire 17 and the lead wire connection portion 161 of the second terminal 16 are exposed to the outside through the openings 55 and 56.

[0026] (5-4) Engagement of terminal structure and lead wire holding member The lead wire holding member 12 is inserted into the member inserting portion 111 of the terminal block 7 along the axial direction A1. In this state, as shown in FIG. 6, the first connecting portion 132 and the second connecting portion 162 are arranged along each other and in contact with each other. Specifically, the first connecting portion 132 and the second connecting portion 162 are arranged parallel to each other. Furthermore, the first connecting portion 132 and the second connecting portion 162 are fixed to each other by a welding portion 173. In this manner, the joint strength between the first terminal 13 and the second terminal 16 can be improved and the contact resistance can be reduced. In particular, the first connecting portion 132 and the second connecting portion 162 are in contact with each other at their flat portions, so that the joint strength can be made higher than ever before.

[0027] The entanglement portion 131 of the first terminal 13 and the lead wire connection portion 161 of the second terminal 16 protrude along the axial direction A1 of the main body portion 211. Note that the entanglement portion 131 and the lead wire connection portion 161 may be inclined within a range of 10 degrees to the axial direction A1 of the main body portion 211 as long as they protrude in a direction intersecting the radial direction of the main body portion 211. With this structure, the resolver stator 2 is made smaller in the radial direction.

[0028] As shown in FIG. 6, the first connecting portion 132 and the second connecting portion 162 are exposed to the outside through the openings 53 and .

[0029] The lead wire holding member 12 has a pair of hooks 153. The pair of hooks 153 are inserted into and hooked onto a pair of slits 154 formed in the member insertion portion 111. This allows the lead wire holding member 12 to be locked to the member insertion portion 111. This makes it possible to prevent the lead wire holding member 12 from coming off the member insertion portion 111.

[0030] (6) Effects According to this embodiment, the first terminal 13 and the second terminal 16 are both L-shaped, and the first connection portion 132 and the second connection portion 162 are connected. Furthermore, the lead wires 17 are arranged so as to run along the lead wire connection portion 161. In other words, there is no need to deform each member when connecting the members. Therefore, the connection work between the first terminal 13 and the second terminal 16 is simplified, and the accuracy of the electrical connection between them is improved.

[0031] In this embodiment, the terminal block 7 is disposed radially inward from the outer circumferential edge 214 of the main body 211. As a result, the terminal block 7 and the lead wire holding member 12 are both disposed on the main body 211 of the stator core 21 and extend in the axial direction A1. This makes it possible to prevent the terminal block 7 and the lead wire holding member 12 from protruding radially outward from the main body 211 of the stator core 21.

[0032] (7) Manufacturing process (7-1) Step of attaching the lead wire to the lead wire holding member The process of attaching the lead wire 17 to the lead wire holding member 12 will be described.

[0033] First, as shown in FIG. 9, a main body 15 is prepared.

[0034] 10, the multiple lead wires 17 are inserted into the multiple grooves 152. As a result, the conductors 172 of the lead wires 17 come into contact with the lead wire connecting portions 161, as shown in FIG.

[0035] 10, resistance welding electrodes 61, 62 are inserted through openings 55, 56 to perform resistance welding between conductor 172 of lead wire 17 and second connection portion 162 of second terminal 16, thereby forming welded portion 174. As a result, conductor 172 and lead wire connection portion 161 are electrically connected to each other.

[0036] (7-2) Assembly of terminal block The operation of assembling the terminal block 7 (the operation of mounting the lead wire holding member 12 to the terminal structure 11) will be described.

[0037] First, as shown in FIGS. 4 and 11, the lead wire holding member 12 is placed on the axially upper side of the terminal structure 11.

[0038] Next, the lead wire holding member 12 is brought close to the terminal structure 11 and inserted into the member insertion portion 111 as shown in Fig. 12. In this state, the second connection portion 162 of the second terminal 16 comes into contact with the first connection portion 132 of the first terminal 13 as shown in Fig. 13. In this manner, by inserting the lead wire holding member 12 into the member insertion portion 111, the first connection portion 132 and the second connection portion 162 come into contact with each other. Furthermore, in this state, the hooks 153 and the slits 154 make it difficult for the lead wire holding member 12 to come off the member insertion portion 111.

[0039] 10, resistance welding electrodes 61, 62 are inserted through openings 53, 54 to perform resistance welding between second connection portion 162 of second terminal 16 and first connection portion 132 of first terminal 13, thereby forming weld portion 173. As a result, first terminal 13 and second terminal 16 are electrically connected.

[0040] Note that before connection, one of the first connection portion 132 and the second connection portion 162 may have a protrusion extending toward the other. In that case, the welding resistance increases, and the amount of heat generated can be increased. No protrusion remains after welding.

[0041] (effect) In this embodiment, the first terminal 13 and the second terminal 16 are both L-shaped, and the first connection portion 132 and the second connection portion 162 are connected. Furthermore, the lead wires 17 are arranged so as to run along the lead wire connection portion 161. In other words, there is no need to deform each member when connecting the members. Therefore, the connection work between the first terminal 13 and the second terminal 16 is simplified, and the accuracy of the electrical connection between them is improved.

[0042] The first connection portion 132 and the second connection portion 162 are disposed so as to be aligned with each other, thereby improving the accuracy of the electrical connection between the first connection portion 132 and the second connection portion 162.

[0043] The first connecting portion 132 and the second connecting portion 162 are welded to each other, so that the first connecting portion 132 and the second connecting portion 162 are reliably fixed.

[0044] In the resolver stator 2, the terminal block portion 7 is disposed radially inward of the outer circumferential edge 214 of the main body portion 211. Therefore, the resolver stator 2 is made smaller in size in the radial direction.

[0045] The entangling portion 131 and the lead wire connection portion 161 protrude in a direction intersecting the radial direction of the main body portion 211. Therefore, the resolver stator 2 is made smaller in size in the radial direction.

[0046] The entangling portion 131 and the lead wire connecting portion 161 protrude in the axial direction A1 of the main body portion 211. Therefore, the resolver stator 2 is made smaller in size in the radial direction.

[0047] (Modification) The first embodiment is merely one of various embodiments of the present disclosure. The first embodiment can be modified in various ways depending on the design and the like as long as the object of the present disclosure can be achieved.

[0048] The means for connecting the first connecting portion 132 and the second connecting portion 162 is not limited to welding.

[0049] (Aspect) The present specification discloses the following aspects.

[0050] A resolver stator (2) according to an embodiment of the present disclosure includes a stator core (21), a winding (22), and a terminal block (7). The stator core (21) includes an annular main body (211) and a plurality of teeth (212) arranged along a circumferential direction (C1) of the main body (211) and extending in a radial direction of the main body (211). The winding (22) is wound around the plurality of teeth (212) to form a plurality of coils (25). The terminal block (7) includes a first terminal (13) to which the winding (22) is connected and a second terminal (16) to which a lead wire (17) is electrically connected. The first terminal (13) has a winding portion (131) around which an end of the winding wire (22) is wound, and a first connection portion (132) extending from the winding portion (131) in a direction intersecting the winding portion (131). The first terminal (13) is L-shaped. The second terminal (16) has a lead wire connection portion (161) to which the lead wire (17) is connected, and a second connection portion (162) extending from the lead wire connection portion (161) in a direction intersecting the winding portion (131) and connected to the first connection portion (132). The second terminal (16) is L-shaped. The lead wire (17) and the lead wire connection portion (161) are arranged along each other.

[0051] According to this embodiment, the first terminal (13) and the second terminal (16) are both L-shaped, and the first connection portion (132) and the second connection portion (162) are connected. Furthermore, the lead wires (17) are arranged to be parallel to the lead wire connection portion (161). In other words, there is no need to deform each member when connecting the members. Therefore, the connection work between the first terminal (13) and the second terminal (16) is simplified, and the accuracy of the electrical connection between them is improved.

[0052] In the resolver stator (2) according to the second aspect, in the first aspect, the first connection portion (132) and the second connection portion (162) are arranged along each other.

[0053] According to this embodiment, the accuracy of the electrical connection between the first connection portion (132) and the second connection portion (162) is improved.

[0054] In the resolver stator (2) according to the third aspect, in the first or second aspect, the first connection portion (132) and the second connection portion (162) are welded to each other.

[0055] According to this embodiment, the first connection portion (132) and the second connection portion (162) are reliably fixed.

[0056] In the resolver stator (2) according to the fourth aspect, in any one of the first to third aspects, the terminal block portion (7) is arranged radially inward of the outer circumferential edge (214) of the main body portion (211).

[0057] According to this embodiment, the resolver stator (2) is made smaller in size in the radial direction.

[0058] In the resolver stator (2) according to the fifth aspect, in any one of the first to fourth aspects, the entangling portion (131) and the lead wire connection portion (161) protrude in a direction intersecting with the radial direction of the main body portion (211).

[0059] According to this embodiment, the resolver stator (2) is made smaller in size in the radial direction.

[0060] In the resolver stator (2) according to the sixth aspect, in any one of the first to fifth aspects, the entangling portion (131) and the lead wire connection portion (161) protrude in the axial direction (A1) of the body portion (211).

[0061] According to this embodiment, the resolver stator (2) is made smaller in size in the radial direction.

[0062] In a resolver stator (2) according to a seventh aspect, in any one of the first to sixth aspects, the lead wire (17) includes a plurality of lead wires (17). The second terminal (16) includes a plurality of second terminals (16) connected to the plurality of lead wires (17), respectively. The resolver stator (2) further includes a lead wire holding member (12), a member insertion portion (111), and locking structures (153, 154). The lead wire holding member (12) holds the plurality of lead wires (17) and the plurality of second terminals (16). The member insertion portion (111) is provided in a main body portion (211), and the lead wire holding member (12) is inserted into the member insertion portion (111). The locking structures (153, 154) lock the lead wire holding member (12) to the member insertion portion (111).

[0063] According to this embodiment, the first connection portion (132) and the second connection portion (162) come into contact with each other by inserting the lead wire holding member (12) into the member insertion portion (111). In this state, the locking structure (153) makes it difficult for the lead wire holding member (12) to come off the member insertion portion (111).

[0064] The resolver stator (2) according to an eighth aspect is related to any one of the first to seventh aspects, in that the stator core (21) further includes an insulator (213) covering the teeth (212). The insulator (213) is integrally formed with the teeth (212).

[0065] According to this embodiment, the teeth (212) can be insulated without increasing the volume of the component.

[0066] A resolver (1) according to a ninth aspect includes a resolver stator (2) according to any one of the first to eighth aspects, and a resolver rotor (3).

[0067] According to this embodiment, the accuracy of electrical connection between the terminals in the terminal block portion (7) is improved. [Explanation of symbols]

[0068] 1: Resolver 2: Resolver stator 3: Resolver rotor 7: Terminal block part 11:Terminal structure 12: Lead wire holding member 13: 1st terminal 15: Main body 16: 2nd terminal 17: Lead wire 21: Stator core 22: Winding 25: Coil 111: Part insertion section 131: Entanglement 132: First connection part 153: Hook (locking structure) 154: Slit (locking structure) 161: Lead wire connection part 162: Second connection part 171: Covering part 172: Conductor 211: Main body 212: Teeth 213: Insulator 214: Outer edge

Claims

1. a stator core having an annular main body and a plurality of teeth arranged along a circumferential direction of the main body and extending in a radial direction of the main body; a winding wound around the teeth to form a plurality of coils; a terminal block portion having a first terminal to which the winding is connected and a second terminal to which a lead wire is electrically connected; Equipped with The first terminal is a winding portion around which an end of the winding is wound; a first connection portion extending from the entanglement portion in a direction intersecting the entanglement portion, It is L-shaped The second terminal is a lead wire connection portion to which the lead wire is connected; a second connection portion extending from the lead wire connection portion in a direction intersecting the entanglement portion and connected to the first connection portion, It is L-shaped, The lead wire and the lead wire connection portion are arranged along each other. Resolver stator.

2. The first connection portion and the second connection portion are disposed along each other. The resolver stator according to claim 1 .

3. The first connection portion and the second connection portion are welded to each other. The resolver stator according to claim 1 or 2.

4. The terminal block portion is disposed radially inward of an outer circumferential edge of the main body portion. The resolver stator according to claim 1 or 2.

5. The entangling portion and the lead wire connection portion protrude in a direction intersecting the radial direction of the main body portion. The resolver stator according to claim 1 or 2.

6. The entangling portion and the lead wire connection portion protrude in the axial direction of the main body portion. The resolver stator according to claim 5 .

7. The lead wire includes a plurality of leads, the second terminal includes a plurality of second terminals connected to the plurality of lead wires, a lead wire holding member that holds the plurality of lead wires and the plurality of second terminals; a member insertion portion provided on the main body portion and into which the lead wire holding member is inserted; and a locking structure for locking the lead wire holding member and the member insertion portion. The resolver stator according to claim 1 or 2.

8. The stator core further includes an insulator covering the plurality of teeth, The insulator is integrally formed with the teeth. The resolver stator according to claim 1 or 2.

9. A resolver stator according to claim 1 or 2; A resolver rotor. Resolver.

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