JP2021058053A - Resolver and motor - Google Patents

Abstract

To achieve a miniaturization while securing an insulation quality of a terminal.SOLUTION: A resolver 1 comprises: a stator 3 oppositely arranged to an outer side of a radial direction of a rotor; an insulator 4 covering the stator 3; a winding 5 wound to the stator 3 via the insulator 4; and a terminal 6 to which the winding 5 is electrically connected while being provided to the insulator 4, and comprises a terminal cover 7 integrally provided with the insulator 4, and insulating and protecting the terminal 6. The insulator 4 includes: a cylindrical part 40 of which the terminal 6 is projected and provided to the end surface; and a hinge part 42 coupling an outer peripheral surface 40f side of the cylindrical part 40 and a terminal cover 7 and having a flexible performance. The terminal cover 7 includes a nipping part 72 that nips a portion 43 on the outer peripheral surface 40f of the insulator 4, and is fixed in a state where the nipping part 72 insulates and protects the terminal 6 in a state of nipping the portion 43 while freely rotating the hinge part 42 to a supporting point.SELECTED DRAWING: Figure 2

Description

The present invention relates to a resolver that detects the rotation speed and rotation angle of the motor, and a motor provided with the resolver.

Conventionally, a motor (particularly a brushless motor) is provided with a detector (sensor) for detecting the rotation speed and the rotation angle (rotation position). There is a resolver as a detector, and since this resolver has high angular resolution and robustness, it is used, for example, in a motor for driving a vehicle, a motor for power steering, and the like. In addition to the rotor and stator, the resolver is configured by accommodating parts such as insulators, windings, and substrates in a casing.

Further, the resolver of Patent Document 1 is provided with two coil covers that cover the coil wound around the stator portion, and the coil covers suppress the decrease in reliability of the resolver due to the intrusion of foreign matter. .. In the resolver of Patent Document 1, a terminal to which the coil is connected is provided in the terminal block portion of the insulator, and a terminal block cover portion covering the terminal block portion is provided in the coil cover, and the coil cover is attached to the insulator. By doing so, the terminals are covered.

Japanese Unexamined Patent Publication No. 2017-189095

By the way, since the size of the resolver can affect the size of the entire motor, it is preferable that the size of the resolver is smaller. However, as in Patent Document 1 above, in a configuration in which the cover covering the terminals is provided separately from the component provided with the terminal (two types of component configurations), there is a gap (space) for fitting the components. This is necessary, and there is a problem that it is difficult to reduce the size of the casing. A method of thinning the mating parts is also conceivable, but it is not preferable because the parts may be damaged due to insufficient strength.

Further, when the casing of the resolver is made of an electric conductor (for example, aluminum alloy or steel), it is necessary to insulate between the inner surface of the casing and the terminal (non-insulating portion). However, in the method of insulating by ensuring a wide space between the inner surface of the casing and the terminals, an unnecessary space is formed in the casing, and it is difficult to reduce the size of the casing. On the other hand, in a configuration in which the distance between the inner surface of the casing and the terminals is narrow, static electricity is generated between the casing and the terminals, which may result in insufficient insulation.

The resolver and motor of this case were devised in view of such problems, and one of the purposes is to reduce the size while ensuring the insulation of the terminals. It should be noted that the other purpose of the present invention is not limited to these purposes, but is an action and effect derived by each configuration shown in the embodiment for carrying out the invention described later, and exerts an action and effect that cannot be obtained by the conventional technique. Is.

(1) The resolver disclosed here is provided on the insulator, a stator arranged so as to face the outer side in the radial direction of the rotor, an insulator covering the stator, a winding wound around the stator via the insulator, and the insulator. It is a resolver including a terminal to which the winding is electrically connected, and is provided with a terminal cover integrally provided with the insulator to insulate and protect the terminal. The insulator has a tubular portion having the terminal projecting from its end surface, and a hinge portion that connects the outer peripheral surface side of the tubular portion and the terminal cover and has flexibility. The terminal cover has a holding portion that sandwiches a portion on the outer peripheral surface side of the insulator, is rotatable around the hinge portion as a fulcrum, and insulates and protects the terminal in a state where the sandwiching portion sandwiches the portion. It is fixed in the state of doing.

(2) The insulator has a fixing portion formed to bulge outward in the radial direction at a position on the outer peripheral surface of the tubular portion that overlaps the terminal in the radial direction, and the hinge portion is the fixing portion. It is preferable that the terminal cover is connected to the terminal cover, and the sandwiching portion sandwiches the fixed portion as the portion from the outside in the radial direction.

(3) The resolver is recessed in one of the fixed portion and the sandwiched portion, and in the other of the fixed portion and the sandwiched portion, and the sandwiched portion sandwiches the fixed portion. It is preferable to provide a concave portion that fits with the convex portion in the state.
(4) It is preferable that the holding portion sandwiches the fixed portion in the axial direction.
(5) In the insulator, it is preferable that the portion where the hinge portion is provided and the portion sandwiched by the sandwiching portion are different from each other.

(6) The motor disclosed here is fixed to the resolver according to any one of (1) to (5) above, a motor rotor that rotates integrally with a shaft fixed to the rotor of the resolver, and a motor housing. The motor stator is provided with a casing attached to the motor housing and accommodating the resolver.

According to the disclosed resolver and motor, the insulating property of the terminal can be ensured and the size can be reduced.

It is a figure which shows the motor provided with the resolver which concerns on embodiment, shows the resolver by the sectional view along the axial direction, and shows the motor by the schematic side view. It is a perspective view which shows the main part of the resolver of FIG. 1, and shows the open state of a terminal cover. It is an enlarged view of the part A of FIG. The resolver of FIG. 2 shows a fixed state of the terminal cover. It is the B part enlarged view of FIG. It is a perspective view which shows the main part of the resolver which concerns on a modification, and shows the open state of a terminal cover.

A resolver and a motor as embodiments will be described with reference to the drawings. The embodiments shown below are merely examples, and there is no intention of excluding the application of various modifications and techniques not specified in the following embodiments. Each configuration of the present embodiment can be variously modified and implemented without departing from the gist thereof. In addition, it can be selected as needed, or can be combined as appropriate.

[1. Constitution]
FIG. 1 is a diagram showing a motor 11 provided with the resolver 1 of the present embodiment, in which the resolver 1 is shown in a cross-sectional view along the axial direction and the motor 11 is shown in a schematic side view. The rotor 2 of the resolver 1 is shown by a broken line. The motor 11 is a brushless motor including a motor stator 13 fixed to the motor housing 18 and a motor rotor 12 that rotates integrally with the shaft 10. The resolver 1 is housed in a casing 8 attached to one end side (upper side in FIG. 1) of the motor housing 18 in the axial direction. In the following description, one end side in the axial direction (upper side in FIG. 1) of the resolver 1 and the motor 11 is referred to as "upper side", and the opposite side (the other end side in the axial direction, lower side in FIG. "Lower side".

The resolver 1 is an inner rotor type detector that is arranged on the shaft 10 and detects the rotation angle (rotation position) of the motor 11. The resolver 1 includes a rotor 2 that rotates integrally with the shaft 10, a stator 3 that is arranged so as to face the outer side in the radial direction of the rotor 2, an insulator 4 that covers the stator 3, and a winding that is wound around the stator 3 via the insulator 4. It includes a wire 5, a terminal 6 to which the winding 5 is electrically connected, a terminal cover 7 that insulates and protects the terminal 6, a substrate 9, and a casing 8 that accommodates them. The type of resolver 1 is not particularly limited.

The rotor 2 is configured by laminating a plurality of annular thin plates (steel plates) made of, for example, a ferromagnetic material, and the shaft 10 is fixed to the center thereof. One end (upper end) of the shaft 10 is supported by a bearing (not shown) with respect to the lid 8B of the casing 8, and the other end (lower end, not shown) is the bottom surface of the motor housing 18. It is supported by a bearing (both not shown) with respect to (a surface portion on the other end side in the axial direction of the motor 11). The casing 8 of the present embodiment includes a bottomed tubular main body 8A attached to the motor housing 18 and a lid 8B that closes the opening of the main body 8A.

The stator 3 has a cylindrical stator core 30 having a short axial dimension, a plurality of salient poles 31 protruding inward in the radial direction from the stator core 30 and arranged at predetermined intervals in the circumferential direction, and each salient pole 31. It has a wound coil 5A. Each salient pole 31 has a teeth portion (not shown) extending radially inward from the stator core 30 around which the winding wire 5 is wound, and a wall portion provided at the tip end portion of the teeth portion. In FIG. 1, only the wall portion of the salient pole 31 is shown. The wall portion is a portion that receives magnetic flux so as to face the outer peripheral surface of the rotor 2 with a gap. The coil 5A is formed by winding the winding 5 around the teeth portion of the salient pole 31. In the resolver 1 of the present embodiment, as shown in FIG. 2, 12 salient poles 31 are arranged at equal intervals in the circumferential direction, but the number of salient poles 31 is not limited to this.

The insulator 4 is formed of an insulating material (for example, resin) and insulates between the stator 3 and the winding 5. As shown in FIGS. 1 and 2, the insulator 4 of the present embodiment has a lower component 4L attached to the other end side in the axial direction (lower side in FIG. 1) of the stator 3 and one end side in the axial direction of the stator 3. It is configured by combining with the upper component 4U attached to. The insulator 4 may be composed of one component.

FIG. 2 is a perspective view showing a main part (stator 3, insulator 4, coil 5, terminal 6, terminal cover 7) of the resolver 1 of the present embodiment, showing a state in which the terminal cover 7 is open (open state). Shown. As shown in FIG. 2, the insulator 4 has a substantially cylindrical tubular portion 40 that insulates the upper and lower end surfaces of the stator core 30, and a tooth portion of a salient pole 31 that extends radially inward from the tubular portion 40. It has a teeth covering portion 41 to be covered, and a hinge portion 42 and a fixing portion 43, which will be described later.

The tubular portion 40 is a portion that is placed on each of the upper and lower end faces of the stator core 30 and insulates the stator core 30 from the axial direction. A plurality of terminals 6 are provided on the upper end surface (upper end surface) of the upper tubular portion 40 in the axial direction. In the resolver 1 of the present embodiment, eight terminals 6 are paired and arranged at four locations at equal intervals (shifted by 90 degrees) in the circumferential direction of the tubular portion 40. A winding 5 is entwined and electrically connected to each terminal 6. The number of terminals 6 and their arrangement are not limited to this.

The tubular portion 40 of the present embodiment is provided with a notch 40a for passing the winding 5 in the radial direction and a stepped surface 40b for passing the winding 5 in the circumferential direction. The cutout portion 40a is a portion in which the upper end surface of the tubular portion 40 is recessed (notched) downward, and is provided so as to penetrate the tubular portion 40 in the radial direction on the radial outer side of each coil 5A. The stepped surface 40b is formed on the outer peripheral surface 40f of the tubular portion 40 over the entire circumferential direction. The shape of the tubular portion 40 is not limited to this.

The tooth covering portion 41 is a portion that insulates the upper portion and the lower portion of the salient pole 31 of the stator 3. The winding 5 is wound around the outer circumference of the tooth covering portion 41, passed through the notch 40a to the outside in the radial direction of the tubular portion 40, and passed over the stepped surface 40b, and the corresponding terminal 6 is passed. Connected to.

By the way, as shown in FIG. 1, the terminal 6 is electrically connected to the winding 5 by soldering, welding, or the like in a state of penetrating the substrate 9 in the axial direction. However, since this connecting portion is not covered with an insulating material (that is, it is exposed in the space of the casing 8), there is a concern that static electricity may be generated or discharged depending on the distance of the casing 8 to the lid portion 8B. In this respect, since the resolver 1 of the present embodiment includes the terminal cover 7 that insulates and protects the terminal 6, the insulation of the terminal 6 is ensured even if the distance between the terminal 6 and the casing 8 is narrow.

As shown in FIGS. 2 to 5, the terminal cover 7 is provided integrally with the insulator 4 (formed by integral molding), and is shown in the “open state” shown in FIGS. 2 and 3 and in FIGS. 4 and 5. It is rotatably configured around the hinge portion 42 as a fulcrum so as to be in a “fixed state”. The hinge portion 42 is a portion that connects the outer peripheral surface 40f side of the tubular portion 40 and the terminal cover 7, and is formed thinner than the other portions and has flexibility. In the resolver 1 of the present embodiment, since the terminals 6 are arranged at four places in the circumferential direction, the terminal covers 7 are also arranged at four places in the circumferential direction. The configuration of each terminal cover 7 and the configuration around it are the same in all four locations.

The open state shown in FIGS. 2 and 3 is a state in which the terminal cover 7 is separated from the terminal 6. The terminal cover 7 is opened when the winding 5 is wound or soldered. When these operations are completed, the terminal cover 7 is rotated around the hinge portion 42 as a fulcrum to a position that covers the terminal 6, and is fixed to the insulator 4 by sandwiching the portion of the tubular portion 40 on the outer peripheral surface 40f side. .. This state is the fixed state shown in FIGS. 4 and 5.

As shown in FIGS. 3 and 5, the terminal cover 7 has an eaves portion 70 that covers the upper part of the terminal 6 in a fixed state, and an outer wall portion 71 that is located on the outer side in the radial direction of the outer peripheral surface 40f of the tubular portion 40. It has a sandwiching portion 72 that sandwiches the portion of the insulator 4. The eaves portion 70 is a portion that is arranged with a gap above the terminal 6 in a fixed state, and is provided as a flat surface portion extending in a direction orthogonal to the axial direction in the present embodiment. The outer wall portion 71 is a portion that is vertically installed at the radial outer end portion of the eaves portion 70 and protects the terminal 6 from the radial outer side. The terminal cover 7 of the present embodiment has a substantially L-shape due to the eaves portion 70 and the outer wall portion 71, but the shape of the terminal cover 7 is not limited to this.

The sandwiching portion 72 is provided below the outer wall portion 71, and is a portion that sandwiches a portion of the tubular portion 40 on the outer peripheral surface 40f side. The sandwiching portion 72 of the present embodiment is composed of two protrusions 72a projecting from the lower end of the outer wall portion 71 and a stepped portion 72b formed by forming the lower portion of the outer wall portion 71 into a thin wall. .. The sandwiching portion 72 sandwiches the portion on the insulator 4 side by sandwiching the portion on the insulator 4 side from the upper surface of the protrusion 72a and the lower surface of the step portion 72b. The terminal cover 7 is fixed in a state (fixed state) in which the terminal 6 is insulated and protected while the sandwiching portion 72 sandwiches the portion.

As shown in FIGS. 2 to 5, the insulator 4 of the present embodiment is a fixed portion formed to bulge outward in the radial direction at a position overlapping the terminal 6 in the radial direction on the outer peripheral surface 40f of the tubular portion 40. Has 43. The fixing portion 43 is a portion sandwiched by the sandwiching portion 72 of the terminal cover 7. In the resolver 1 of the present embodiment, since the terminals 6 are arranged at four places in the circumferential direction, the fixing portions 43 are also provided at four places in the circumferential direction.

The fixing portion 43 of the present embodiment has an upper surface 43a facing the lower surface of the stepped portion 72b of the sandwiching portion 72, a lower surface 43b facing the upper surface of the protruding portion 72a of the sandwiching portion 72, and a side surface connecting these surfaces 43a and 43b. It has a block shape with 43c (a shape like a rectangular parallelepiped with the lower two corners cut off). The hinge portion 42 is formed continuously with the fixing portion 43 on the surface of the side surface 43c of the fixing portion 43 on the counterclockwise rotation side with respect to the terminal 6, and the rotation center thereof extends in the axial direction. That is, in the present embodiment, the hinge portion 42 of the insulator 4 connects the fixing portion 43 and the terminal cover 7.

The sandwiching portion 72 of the present embodiment sandwiches the fixing portion 43 in the axial direction from the outside in the radial direction. Therefore, in the fixed state, the upper surface 43a of the fixing portion 43 and the lower surface of the step portion 72b of the sandwiching portion 72 are in surface contact, and the lower surface 43b of the fixing portion 43 and the upper surface of the protrusion 72a of the sandwiching portion 72 are in surface contact. It is preferable to do so. The resolver 1 of the present embodiment has a convex portion 72c projecting from the lower surface of the step portion 72b of the sandwiching portion 72 and a concave portion 43d recessed from the upper surface 43a of the fixing portion 43, and the sandwiching portion 72 is fixed. The concave portion 43d, the convex portion, and the 72c are fitted while sandwiching the portion 43. As a result, the fixed state by the holding portion 72 is maintained, so that there may be a slight gap between the upper surface 43a of the fixing portion 43 and the lower surface of the stepped portion 72b of the holding portion 72.

Further, the insulator 4 includes a portion where the hinge portion 42 is provided (here, a part of the side surface 43c of the fixing portion 43) and a portion sandwiched by the sandwiching portion 72 (here, the upper surface 43a and the lower surface 43b of the fixing portion 43). ) Are different from each other. In other words, the direction in which the rotation center of the hinge portion 42 extends (axial direction) and the extending direction (circumferential direction and radial direction) of the surface sandwiched by the sandwiching portion 72 intersect with each other.

[2. Action, effect]
(1) According to the resolver 1 described above, since the terminal 6 is insulated and protected by the terminal cover 7 provided integrally with the insulator 4, a cover covering the terminal 6 is provided separately (two types of parts). It can be made smaller than the configuration). Further, since the insulating property of the terminal 6 can be ensured by the terminal cover 7, the distance between the terminal 6 and the casing 8 can be narrowed, and the size can be reduced from this point as well. Further, since the insulator 4 is provided with the rotatable terminal cover 7, the versatility of the resolver 1 can be enhanced.

(2) In the resolver 1 described above, the insulator 4 has a fixing portion 43 bulging from the outer peripheral surface 40f of the tubular portion 40, and the sandwiching portion 72 sandwiches the fixing portion 43 from the outside in the radial direction. Therefore, as compared with the configuration in which a part of the tubular portion 40 of the insulator 4 is sandwiched by the sandwiching portion 72, the fixed state of the terminal cover 7 can be stabilized with a simple configuration, and the insulating property of the terminal 6 can be ensured. For example, in the case where a part of the tubular portion 40 is sandwiched by the sandwiching portion 72 without providing the fixing portion 43, the tubular portion 40 is sandwiched while avoiding interference with the winding 5 passed around the tubular portion 40. Since the portion is provided in the tubular portion 40, the shape of the tubular portion 40 may become more complicated. On the other hand, the insulator 4 of the present embodiment is provided with a dedicated portion (fixing portion 43) to which the terminal cover 7 is fixed on the radial outer side of the tubular portion 40, so that the shape of the tubular portion 40 can be changed. There is no need to make it complicated, and the configuration of the entire insulator 4 can be simplified.

(3) Further, according to the resolver 1 described above, the convex portion 72c of the sandwiching portion 72 and the concave portion 43d of the fixing portion 43 are fitted to each other in a state where the sandwiching portion 72 sandwiches the fixed portion 43, so that the terminal cover 7 Is more difficult to come off, the fixed state of the terminal cover 7 can be made more stable, and the insulating property of the terminal 6 can be ensured.
(4) Further, since the sandwiching portion 72 has a configuration in which the fixing portion 43 is sandwiched in the axial direction, the fixed state of the terminal cover 7 can be more stabilized and the insulating property of the terminal 6 can be ensured.

(5) In the above insulator 4, the hinge portion 42 connecting the terminal cover 7 and the insulator 4 and the portion sandwiched by the sandwiching portion 72 of the terminal cover 7 (fixed portion 43 in the present embodiment) are different. It will be set up in the place. In this way, by providing the parts having different functions in different places, the workability is better than the configuration provided in the same place, and the insulating property of the terminal 6 can be ensured while simplifying the shape.

(6) In the motor 11 provided with the resolver 1 described above, the insulation of the terminals 6 can be ensured by the terminal cover 7 provided integrally with the insulator 4, so that the casing 8 of the resolver 1 can be miniaturized. , The size of the motor 11 can also be reduced. Further, since it is sufficient to attach the resolver 1 which is relatively simple to provide the insulator 4 of the resolver 1 with the rotatable terminal cover 7 to the motor 11, it is not necessary to change the configuration of the existing motor 11, and the cost can be reduced. The number of man-hours can be reduced.

[3. Others]
The above-mentioned configuration of the resolver 1 is an example, and is not limited to the above-mentioned one. For example, the terminal cover 7 rotates around a hinge portion 42 having a rotation center extending in the axial direction as a fulcrum, as if opening and closing a door. However, the position of the hinge portion 42 is fixed at the fixing portion 43. It may be set on the lower surface 43b instead of the side surface 43c.

FIG. 6 is a perspective view (a view corresponding to FIG. 2) showing a main part of the resolver 1'related to the modified example, and shows an open state of the terminal cover 7. The same reference numerals are given to the same configurations as those in the above-described embodiment, and the description thereof will be omitted. The resolver 1'is configured in the same manner as the resolver 1 described above, except that the positions of the hinge portions 42'are different.

As shown in FIG. 6, in this resolver 1', the portion where the hinge portion 42'is provided and the portion sandwiched by the sandwiching portion 72 (in FIG. 6, the upper surface 43a and the lower surface 43b of the fixing portion 43) are the same as each other. is there. Specifically, the hinge portion 42'is formed on the lower surface 43b of the fixing portion 43 in succession with the fixing portion 43, and its rotation center extends substantially in the circumferential direction and is sandwiched by the sandwiching portion 72. It is parallel to the extending direction of the surface. The hinge portion 42'connects a portion (a portion between the two protrusions 72a) which is the lower end portion of the terminal cover 7 in the fixed state and the fixing portion 43. In the resolver 1'of FIG. 6, the terminal cover 7 is rotated so as to close upward, and the fixing portion 43 is sandwiched to bring the fixing portion 43 into a fixed state. Even with such a configuration, an effect other than the above-mentioned (5) can be obtained.

Further, in the above resolvers 1, 1', the sandwiching portion 72 sandwiches the fixed portion 43 in the axial direction, but the sandwiching portion may be sandwiched by sandwiching the fixed portion 43 in the circumferential direction. In this case, for example, the side surface 43c of the fixing portion 43 may be formed with irregularities corresponding to the concave portion 43d or the convex portion 72c, and the sandwiching portion side may also be formed with irregularities so as to be fitted.

In the above resolvers 1, 1', the sandwiching portion 72 is provided with a convex portion 72c and the fixing portion 43 is provided with a concave portion 43d. However, the sandwiching portion 72 is provided with a concave portion and the fixing portion 43 is provided with a convex portion. May be good. The concave portion and the convex portion are not essential configurations and can be omitted.

In the above resolvers 1, 1', the fixing portions 43 as the portions sandwiched by the sandwiching portions 72 are provided in the insulators 4, 4', but the fixing portions 43 may be omitted. At least, the position of the terminal cover may be fixed by the sandwiching portion of the terminal cover sandwiching the portion on the outer peripheral surface side of the insulator, and the terminal may be insulated and protected by the terminal cover.

1,1'Resolver 2 Rotor 3 Stator 4,4'Insulator 40 Cylindrical part 40f Outer peripheral surface 42,42' Hinge part 43 Fixed part (part)
43d Concave 5 Winding 5A Coil 6 Terminal 7 Terminal cover 72 Holding part 72c Convex part 8 Casing 10 Shaft 11 Motor 12 Motor rotor 13 Motor stator 18 Motor housing

Claims (6)

A stator arranged so as to face the radial outer side of the rotor, an insulator covering the stator, a winding wound around the stator via the insulator, and a winding provided on the insulator and electrically connected to the winding. It is a resolver equipped with a terminal to be used.
It is provided integrally with the insulator and has a terminal cover that insulates and protects the terminals.
The insulator has a tubular portion having the terminal projecting from its end surface, and a hinge portion that connects the outer peripheral surface side of the tubular portion and the terminal cover and has flexibility.
The terminal cover has a holding portion that sandwiches a portion on the outer peripheral surface side of the insulator, is rotatable around the hinge portion as a fulcrum, and insulates and protects the terminal in a state where the sandwiching portion sandwiches the portion. A resolver characterized by being fixed in a state of being fixed. The insulator has a fixing portion formed to bulge outward in the radial direction at a position on the outer peripheral surface of the tubular portion that overlaps the terminal in the radial direction.
The hinge portion connects the fixing portion and the terminal cover, and forms the hinge portion.
The resolver according to claim 1, wherein the sandwiching portion sandwiches the fixed portion as the portion from the outside in the radial direction. A convex portion projecting from one of the fixed portion and the sandwiching portion,
2. The second aspect of the present invention, wherein the fixing portion and the sandwiching portion are recessed in the other side, and the sandwiching portion is provided with a concave portion that fits with the convex portion in a state of sandwiching the fixed portion. Resolver. The resolver according to claim 2 or 3, wherein the sandwiching portion sandwiches the fixing portion in the axial direction. The resolver according to any one of claims 1 to 4, wherein the insulator is characterized in that a portion provided with the hinge portion and the portion sandwiched by the sandwiching portion are different from each other. The resolver according to any one of claims 1 to 5 and
A motor rotor that rotates integrally with a shaft fixed to the rotor of the resolver, and
With the motor stator fixed to the motor housing,
A motor that is attached to the motor housing and includes a casing that houses the resolver.

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