JP2013027123A - Resolver, rolling bearing device with resolver, and resolver assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily push a stator 12 into a cylindrical part 25 of a case member 15 from one side in an axial direction, when assembling a resolver comprising a rotor 13 mounted to a rotation shaft 11, the annular stator 12 provided outside the rotor 13 in a radial direction, and the case member 15 having the cylindrical part 25 fitted with the stator 12 from the one side in the axial direction.SOLUTION: A stator 12 includes a stator core 42 having plural tooth parts 46 projecting from an annular part 45 inward in a radial direction and opposed to an outer periphery of the rotor 13, and an insulator 44 having a first portion 51 covering the stator core 42 from one side in the axial direction and a second portion 52 covering the other side in the axial direction. Plural openings 54 for partially exposing the annular part 45 toward the one side in the axial direction are formed on the first portion 51 at intervals in a circumferential direction.

Description

  The present invention relates to a resolver used for detecting a rotation angle (rotational position) of a rotating shaft such as a motor, a rolling bearing device with a resolver, and a method for assembling the resolver.

  The resolver is one of angle detection devices used to detect the rotation angle (rotation position) of the rotation shaft, and includes a stator and a rotor. The stator is formed in an annular shape, and has a plurality of tooth portions (tooth portions) spaced apart in the circumferential direction on the inner peripheral side, and a coil is wound around each tooth portion. Moreover, the rotor is attached to the rotating shaft so as to be integrally rotatable, and is disposed in a state where a gap is formed on the radially inner side of the stator (see, for example, Patent Document 1).

  In the resolver described in Patent Document 1, the rolling bearing that rotatably supports the stator, the rotor, and the rotating shaft is an individual component, which is individually provided for a housing such as a motor and the rotating shaft. It is attached. For this reason, handling of each component such as a stator and assembly of each component with respect to the housing and the rotating shaft become complicated, and it becomes difficult to increase assembly accuracy such as alignment of each component.

JP 2007-336714 A

Therefore, the inventors of the present application have already proposed a resolver including a case member that accommodates the rolling bearing and the stator as one unit (Japanese Patent Application No. 2011-028935; Is called the invention of the prior application).
As shown in FIG. 9, the resolver according to the invention of the prior application has a rotor 91 attached to a rotary shaft 90, an annular stator 92 provided on the radially outer side of the rotor 91, and the rotary shaft 90. And a cylindrical case member 94. The stator 92 and the rolling bearing 93 are fitted into the case member 94 from one side in the axial direction.

In order to fit the stator 92 into the cylindrical portion 95 of the case member 94, it is necessary to push the stator 92 with a jig 96 from one axial side. Since the stator 92 has an annular stator core 97 made of metal and a resin insulator 98 covering the stator core 97 from both sides in the axial direction, the stator 92 is cured from one side in the axial direction. The portion against which the tool 96 is pressed needs to be the stator core 97, not the insulator 98.
However, the region K1 for pressing the stator core 97 by the jig 96 is very narrow, and the insulator 98 and the coil 99 may be damaged by the jig 96 if the work is not performed carefully. Particularly recently, it has been required to reduce the radial width of the stator 92 while maintaining a wide area K2 around which the coil 99 is wound. In this case, an area K1 for pushing the stator core 97 by the jig 96 is increasingly being increased. It becomes narrow and the assembly work becomes difficult.

  Therefore, the present invention provides a resolver that can easily perform the operation of pushing the stator into the cylindrical portion of the case member from one axial side during assembly, a rolling bearing device with a resolver, and a resolver that facilitates the operation. It aims at providing the assembly method of.

  The resolver of the present invention includes a rotor attached to a rotating shaft, an annular stator provided on the outer side in the radial direction of the rotor, and a case member having a cylindrical portion into which the stator is fitted from one side in the axial direction. The stator includes an annular portion, a stator core having a plurality of teeth portions protruding radially inward from the annular portion and facing the rotor, and a first portion covering the stator core from one axial side And an insulator having a second portion covering from the other side in the axial direction, and a coil wound around the tooth portion via the insulator, and the annular portion is partially included in the first portion. A plurality of openings exposed to one side in the axial direction are formed at intervals in the circumferential direction.

  In assembling the resolver, in order to fit the stator into the cylindrical portion of the case member, for example, it is necessary to push the stator into the cylindrical portion of the case member from one side in the axial direction using a jig. Therefore, according to the present invention, the jig is pressed against the annular portion through the opening formed in the first portion of the insulator, and the annular portion is pressed by the jig, so that the stator is cylinder of the case member. It can be fitted into the part from one side in the axial direction. That is, the opening can widen the portion where the jig presses the annular portion (stator core), and the resolver can be assembled easily. Since a plurality of openings are formed at intervals in the circumferential direction in the first portion, it is possible to simultaneously press the annular portion (stator core) from a plurality of locations, and assembling work is facilitated.

In addition, the first portion covers the tooth portion and the inner covering portion around which the coil is wound, the outer covering portion that is on the outer side in the radial direction and covers the annular portion, and the inner covering portion and the outer covering. It is preferable that a plurality of openings are formed in the outer covering portion at intervals in the circumferential direction.
In this case, the outer covering portion is partially missing by the opening, and the annular portion is partially exposed over a wide area, but this exposed portion and the inner covering portion around which the coil is wound Are separated by the wall, the exposed portion and the coil are kept insulated.

Further, three or more projecting portions projecting radially outward are formed on the outer peripheral surface of the stator core at intervals in the circumferential direction, and the stator fits into the cylindrical portion at a position where the projecting portion is formed. It is preferable that the opening is formed at a circumferential position corresponding to a position where the protrusion is formed.
In this case, the position pressed by the jig and the position where the stator is fitted into the cylindrical portion in a state of being fitted (that is, the position where the protrusion is formed) coincide with each other in the circumferential direction. For this reason, when the stator is pushed into the cylindrical portion of the case member, the stator can be fitted into the case member without excessively deforming the stator core.
Furthermore, since the stator is press-fitted into the cylindrical portion at the position where the protruding portion is formed on the outer peripheral surface of the stator core, the dimensional error of the cylindrical portion and Less affected by distortion and the like. For this reason, the clearance gap between the teeth part of a stator and a rotor can be set appropriately, and it becomes possible to maintain the detection accuracy of the rotation angle of a rotating shaft.

A rolling bearing device with a resolver according to the present invention includes a rolling bearing that includes the resolver, an inner ring, an outer ring, and a rolling element that is arranged to roll between them, and that rotatably supports a rotating shaft. The resolver case member has an outer ring attachment portion to which an outer ring of the rolling bearing is attached, and the stator and the rolling bearing are assembled as a unit by the case member. To do.
According to the present invention, handling of the stator and the rolling bearing is facilitated, and the assembly operation of the stator and the rolling bearing with respect to the rotating shaft and the housing housing the rotating shaft can be easily performed.

Further, the present invention provides a resolver for assembling a ring-shaped stator provided on the radially outer side of a rotor that rotates integrally with a rotating shaft into a cylindrical portion of a cylindrical case member from one axial direction. In the assembling method, an annular stator core included in the stator is covered from the axial direction, and an opening for partially exposing the stator core toward one side in the axial direction is formed at intervals in the circumferential direction. With the insulator attached to the stator core, the jig is pressed against the stator core through the opening, and the stator core is pressed against the stator core by the jig, whereby the stator is pivoted on the cylindrical portion of the case member. It is characterized by being fitted from one side of the direction.
According to the present invention, the jig is pressed against the annular stator core through the opening formed in the insulator, and the stator is pressed by the jig from the one side in the axial direction to the cylindrical portion of the case member. Can be fitted. That is, the opening can widen the portion where the jig pushes the stator core, and the assembly work of the resolver becomes easy.
Since a plurality of openings are formed in the insulator at intervals in the circumferential direction, the stator core can be simultaneously pressed from a plurality of locations, and the assembling work is facilitated.

  According to the present invention, at the time of assembling the resolver, it is possible to easily perform an operation of pushing the stator into the cylindrical portion of the case member from one side in the axial direction.

It is side surface sectional drawing which shows one Embodiment of the rolling bearing apparatus with a resolver of this invention. It is a front view which shows a part of resolver. It is a side view which shows a part of resolver. It is a perspective view of a jig, a stator, and a case member. It is a front view which shows a stator and a rotor. It is a front view which expands and shows a part of stator. It is a front view which shows a stator core. It is an enlarged view of the P section of Drawing 1, (a) shows the state just before a stator is inserted in a case member, and (b) shows the state where insertion was completed. It is side surface sectional drawing of the resolver of prior invention.

FIG. 1 is a side sectional view showing an embodiment of a rolling bearing device 1 with a resolver according to the present invention. The resolver 10 of the present embodiment is used for detecting the rotation angle (rotation position) of a rotation shaft 11 of a motor generator used in a hybrid vehicle, for example. The resolver 10 is attached to the rotation shaft 11 and is connected to the rotation shaft 11. A rotor 13 that rotates integrally, an annular stator 12 provided outside the rotor 13 in the radial direction, and a cylindrical case member 15 that holds the stator 12 are provided.
Further, in the present embodiment, a rolling bearing 14 that rotatably supports the rotating shaft 11 is provided, and the rolling bearing 14 and the stator 12 are integrally assembled as one unit by the case member 15. Yes.

  The rolling bearing 14 includes an inner ring 19, an outer ring 21 disposed concentrically on the radially outer side of the inner ring 19, and a plurality of rolling elements 22 disposed so as to be able to roll between the inner ring 19 and the outer ring 21. have. The rolling bearing 14 of the present embodiment is a ball bearing provided with balls as the rolling elements 22. The outer ring 21 is fixed to the case member 15, and the inner ring 19 is fixed to a mounting portion 16 that the rotating shaft 11 has.

2 is a front view showing a part of the resolver 10 (a part excluding the rotor 13), and FIG. 3 is a side view showing a part of the resolver 10 (same as above). FIG. 4 is a perspective view of the jig 70, the stator 12, and the case member 15 described later.
The case member 15 has a first cylinder part 25 in which the stator 12 is fitted from one axial direction side, and a second cylinder part 24 in which the rolling bearing 14 is fitted from one axial direction side. ing. The first cylindrical portion 25 is formed in a cylindrical shape, and the outer peripheral surface of the stator 12 is fitted and fixed to the inner peripheral surface thereof by press-fitting. The second cylindrical portion 24 is also formed in a cylindrical shape, and the outer peripheral surface of the outer ring 21 is fitted and fixed to the inner peripheral surface thereof by press-fitting.

An outer flange portion 29 that is bent outward in the radial direction is formed at the axial end portion of the first cylindrical portion 25. The second cylinder part 24 is formed with a smaller diameter than the first cylinder part 25, and is a disc disposed along the radial direction between the second cylinder part 24 and the first cylinder part 25. A portion 27 is formed. Further, an inner flange portion 28 that is bent inward in the radial direction is formed at the axial end portion of the second cylindrical portion 24.
The first cylindrical portion 25, the second cylindrical portion 24, the disc portion 27, the inner flange portion 28, and the outer flange portion 29 are subjected to plastic processing such as press processing (drawing processing) on a metal plate material. It is integrally formed by applying. Each of these portions is formed concentrically around the axis O of the cylindrical case member 15.

  The inner flange portion 28 functions as a restricting portion that restricts the position in the axial direction of the outer ring 21 fitted to the second cylindrical portion 24. Further, the outer flange portion 29 is formed on the entire circumference except for the position of the connector portion 53 described later, and has a function as a rib that reinforces the first cylindrical portion 25. The outer flange portion 29 is further formed with a plurality (three in the illustrated example) of flange portions 31 extending outward in the radial direction at regular intervals in the circumferential direction. The flange portion 31 is formed with an arc-shaped long hole 32 centered on the axis O.

As shown in FIG. 1, the case member 15 is attached to a housing 35 such as a motor generator using a fixing ring 34. As shown in FIG. 2, the fixing ring 34 has a plurality (three) of boss portions 36 with a constant interval in the circumferential direction. The boss portion 36 is connected to the plate body of the fixing ring 34. Bolt holes (screw holes) 37 are formed to overlap the formed through holes 34a (see FIG. 1).
Then, the fixing ring 34 is overlapped with the flange portion 31, the flange portion 31 is sandwiched between the fixing ring 34 and the housing 35, and the bolt 38 is inserted through the housing 35, the long hole 32, and the through hole 34 a to fix the fixing ring 34. The case member 15 is attached to the housing 35 by being screwed to the boss portion 36 of 34. Further, when the bolt 38 is loosened, the circumferential position of the case 15 relative to the housing 35 can be adjusted within the circumferential range of the long hole 32.

  As shown in FIG. 1, the rotating shaft 11 is integrally provided with a mounting portion 16. An inner ring mounting portion 16 a into which the inner ring 19 is fitted is formed in the mounting portion 16, and the rotor 13 is fixed to an intermediate portion in the axial direction of the mounting portion 16. The attachment portion 16 may be configured as a separate component from the rotating shaft 11. In this case, the attachment portion 16 is formed in a cylindrical shape using a metal material, a synthetic resin material, or the like, and is fitted to the outer peripheral surface of the rotation shaft 11 so as to be integrally rotatable with the rotation shaft 11. Good.

5 is a front view showing the stator 12 and the rotor 13, FIG. 6 is an enlarged front view showing a part of the stator 12, and FIGS. 5 and 6 are both on the one side in the axial direction of FIG. It is the figure seen from. FIG. 7 is a front view showing a stator core 42 that the stator 12 has.
The stator 12 includes an annular stator core 42 (see FIG. 7), a coil 43, and an insulator 44. In FIG. 7, the stator core 42 is made of a magnetic material such as a single layer or a plurality of layers of silicon steel plates, and has an annular annular portion 45 and a plurality of (see FIG. 7) protruding radially inward from the annular portion 45. Eight teeth in the example shown) are integrally provided. The plurality of tooth portions 46 are formed at regular intervals in the circumferential direction, and each of them faces the outer peripheral surface of the rotor 13 with a gap (see FIG. 5). Each tooth portion 46 includes a base portion 46a and a distal end portion 46b. The base portion 46a has a smaller width in the circumferential direction than the distal end portion 46b, and the distal end portion 46b is formed in a shape that greatly extends from the base portion 46a to both sides in the circumferential direction. Has been. An excitation coil 43 and an output coil 43 are wound around the base portion 46a of the tooth portion 46 via an insulator 44 (see FIG. 5).

The insulator 44 is formed in an annular shape by an insulating material such as synthetic resin. As shown in FIG. 1, the insulators 44 are arranged on both sides of the stator core 42 in the axial direction, and a first portion 51 that covers the stator core 42 from one side in the axial direction, and a second portion 52 that covers the other side in the axial direction. have.
As shown in FIG. 6, the first portion 51 disposed on one side of the stator core 42 in the axial direction of the insulator 44 covers the teeth portion 46 (and the inner peripheral edge portion of the annular portion 45), and the coil. 43 has an inner covering portion 47 around which the tooth portion 46 and the coil 43 are insulated. Further, the inner covering portion 47 is provided with a wall portion 49 projecting in the axial direction (inner side in the radial direction). The wall part 49 is intermittently provided in the circumferential direction.

Further, the first portion 51 is outside the inner covering portion 47 in the radial direction and covers the annular portion 45 (the portion excluding the inner peripheral edge of the annular portion 45), and the inner covering portion 47 and the outer covering portion. 48 has a wall portion 50 that divides 48. The wall portions 49 and 50 are provided to face each other in the radial direction, and the coil 43 is wound between the wall portions 49 and 50. The wall part 50 is intermittently provided in the circumferential direction, and the coil wire can be passed between the adjacent wall parts 50.
The above-described configuration is the same for the second portion 52 disposed on the other side in the axial direction of the stator core 42, and a description thereof will be omitted. Moreover, the connector part 53 provided with the terminal which connects the coil 43 is formed in the 1st part 51 (refer FIG. 5).

  In FIG. 6, the outer covering portion 48 of the first portion 51 is mainly intended to cover the annular portion 45 of the stator core 42, and the annular portion 45 is partially axially disposed on the outer covering portion 48. A plurality of openings 54 exposed toward one side are formed at intervals in the circumferential direction. In the present embodiment, the opening portion 54 is formed by cutting the outer covering portion 48 from the radially outer side. In FIG. 6, E is the circumferential range of the opening 54. The openings 54 are formed at eight places, the same number as the teeth 46, and these openings 54 are equally spaced in the circumferential direction and are formed at circumferential positions corresponding to the teeth 46.

Thus, the outer covering portion 48 is partially missing by the opening 54, and the annular portion 45 is partially exposed over a wide area, but the opening 54 (exposed portion R of the stator core 42) and Since the wall portion 50 is interposed between the coil 43 and the coil 43, the coil 43 is kept insulated from the annular portion 45 (stator core 42).
And, as will be described later, when the stator 12 is fitted into the first cylindrical portion 25 of the case member 15 (see FIG. 4), the portion where the jig 70 presses the annular portion 45 (exposed portion R) of the stator core 42 is The opening 54 is widened, and the resolver 10 can be easily assembled.

As shown in FIG. 5, the rotor 13 is formed in a substantially oval shape when viewed from the front (viewed in the axial direction), and the outer peripheral surface thereof faces the teeth portion 46 of the stator 12 with a gap. When the rotating shaft 11 rotates, the rotor 13 also rotates integrally, and the size of the gap between each tooth portion 46 of the stator 12 and the rotor 13 changes.
Excitation coils 43 are provided for all teeth 46, and the output coil 43 includes a SIN output coil 43 and a COS output coil 43, which are provided for a plurality of teeth 46. Are provided alternately in the circumferential direction.
When an alternating current is passed through the exciting coil 43, an output corresponding to a change in the size of the gap is generated in the output coil 43, and the rotation angle of the rotary shaft 11 is detected based on this output. can do. That is, the amplitude change of the output voltage of the SIN output coil 43 and the COS output coil 43 is 90 ° out of phase, and the rotation angle of the rotating shaft 11 is detected by signal processing of this output voltage. Can do.

  As shown in FIG. 7, a plurality of projecting portions 60 projecting radially outward are formed on the outer peripheral surface of the stator core 42 at regular intervals in the circumferential direction. It is only necessary that three or more projecting portions 60 be formed. In the present embodiment, eight projections 60 having the same number as the tooth portions 46 are formed at circumferential positions corresponding to the tooth portions 46. And as shown in FIG. 5, the said opening part 54 is formed in the circumferential direction position corresponded in the formation position of this protrusion part 60. As shown in FIG.

  A method for assembling the resolver 10 having the above configuration will be described. In the assembly method described below, as shown in FIG. 4, the annular stator 12 is fitted to the first cylindrical portion 25 of the cylindrical case member 15 from one side in the axial direction. It is a method of putting and assembling. FIG. 8 is an enlarged view of a P portion in FIG. 1, (a) shows a state immediately before the stator 12 is fitted into the case member 15, and (b) shows a state where the fitting is completed.

  As described above, the insulator 44 of the stator 12 fixed to the case member 15 by this assembling method includes the first portion 51 that covers the annular stator core 42 from one side in the axial direction and the second portion 52 that covers from the other direction side. The first portion 51 is formed with an opening 54 that partially exposes the stator core 42 (annular portion 45) toward one axial side.

As shown in FIG. 4, the insulator 44 is attached to the stator core 42, and the stator 12 in this attached state is brought closer to the case member 15 from one side in the axial direction, and one axial direction of the case member 15 is placed. Let it be the state (state of Fig.8 (a)) lightly inserted in the opening end part 15a of the side. The cylindrical jig 70 is pressed against the axial side surface of the stator core 42 (annular portion 45) through the opening 54, and the stator core 42 is pressed toward the other axial side by the jig 70. By this operation, the stator 12 can be fitted into the first cylindrical portion 25 of the case member 15 from one side in the axial direction.
Note that the jig 70 has a cylindrical shape as a whole, and has a plurality of claw portions 70 a provided at the end portions at the same circumferential interval as the opening 54. The front end surface of the claw portion 70a comes into contact with and presses the exposed portion R (see FIG. 6).

  Thereby, the stator 12 is attached by fitting the outer peripheral surface thereof to the inner peripheral surface of the first cylindrical portion 25 of the case member 15 (state shown in FIG. 8B). And since the protrusion part 60 is formed in the outer peripheral surface of the stator core 42, in the formation position of the said protrusion part 60, the stator core 42 will be in the state of interference fit, and it is inserted by the cylinder part 25. FIG. Further, the outer peripheral surface of the stator core 42 excluding the protruding portion 60 is in a clearance fit state.

  Here, if the protruding portion 60 is not formed and the entire outer peripheral surface of the stator core 42 is press-fitted into the cylindrical portion 25, for example, if there is distortion or dimensional error in a part of the inner peripheral surface of the cylindrical portion 25. In that portion, the radial position of the tooth portion 46 of the stator core 42 changes, and the gap with the rotor 13 is not properly set in a part of the circumferential direction, and it is difficult to accurately detect the rotation angle of the rotating shaft 11. It becomes. That is, there arises a disadvantage that the roundness of the inner peripheral surface of the cylindrical portion 25 greatly affects the detection accuracy of the rotation angle. On the other hand, in the case of the present embodiment, since only the portion where the protruding portion 60 is formed is press-fitted into the cylindrical portion 25 in the outer peripheral surface of the stator core 42, the possibility that the above disadvantages occur is reduced. be able to.

According to the above assembling method, the claw portion of the jig 70 is passed through the opening 54 formed in the first portion 51 of the insulator 44 in order to fit the stator 12 into the first cylindrical portion 25 of the case member 15. 70 a is pressed against the annular portion 45 of the stator core 42, and the stator core 42 is pressed by the jig 70, whereby the stator 12 can be fitted into the first cylindrical portion 25 from one side in the axial direction. That is, the opening 54 can widen the portion where the jig 70 pushes the stator core 42, and the assembling work becomes easy.
Since a plurality of openings 54 are formed in the first portion 51 of the insulator 44 at intervals in the circumferential direction, the jig 70 can simultaneously push the stator core 42 in the axial direction from a plurality of locations. The stator 12 can be easily assembled without being inclined with respect to the axis O.

  Further, in the present embodiment, a position where the stator core 42 is pushed by the jig 70, a position where the stator 12 is fitted into the first tubular portion 25 in a state of being fitted (that is, a position where the protruding portion 60 is formed). Match in the circumferential direction. Therefore, when the stator core 42 is pushed into the first cylindrical portion 25 of the case member 15 by the jig 70, the stator 12 can be fitted into the case member 15 without excessively deforming the stator core 42. .

  Further, in the resolver 10 of the present embodiment, the stator 12 and the rolling bearing 14 are integrated (unitized) by the case member 15, so that the stator 12 is compared with the case where they are configured separately. And the handling of the rolling bearing 14 is easy, and the assembly work of the stator 12 and the rolling bearing 14 with respect to the rotating shaft 11 and the housing 35 can be easily performed. Further, by integrating the stator 12 and the rolling bearing 14, it is possible to accurately align the axis of the stator 12 and the rolling bearing 14. For this reason, the assembly accuracy of the stator 12 and the rotating shaft 11 assembled to the rolling bearing 14, the rotor 13 attached to the rotating shaft 11, and the stator 12 can also be improved.

The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the invention described in the claims.
For example, the number and shape of the teeth portions 46 of the stator 12 and the shape of the rotor 13 are not limited to the above-described embodiment, and a conventionally known configuration can be appropriately employed.
Moreover, in each said embodiment, although the protrusion part 60 formed in the stator 12 was made into the same number (eight) as the teeth part 46, if it can press-fit appropriately with respect to the cylinder part 25, a teeth part will be sufficient as it. The number may be less than or greater than 46, or the protrusion 60 may be completely absent.

  DESCRIPTION OF SYMBOLS 10: Resolver 11: Rotating shaft 12: Stator 13: Rotor 14: Rolling bearing 15: Case member 19: Inner ring 21: Outer ring 22: Rolling element 24: 2nd cylinder part (outer ring attaching part) 25: 1st cylinder part (Cylinder part) 42: Stator core 43: Coil 44: Insulator 45: Annular part 46: Teeth part 47: Inner covering part 48: Outer covering part 49: Wall part 50: Wall part 51: First part 52: Second part 54 : Opening 60: Protruding part 70: Jig

Claims (5)

A rotor attached to the rotating shaft, an annular stator provided on the radially outer side of the rotor, and a case member having a cylindrical portion into which the stator is fitted from one side in the axial direction,
The stator is
An annular portion, and a stator core having a plurality of teeth portions projecting radially inward from the annular portion and facing the rotor;
An insulator having a first portion covering the stator core from one axial side and a second portion covering from the other axial side;
A coil wound around the teeth portion via the insulator,
The resolver according to claim 1, wherein a plurality of openings are formed in the first portion so as to partially expose the annular portion toward one axial side. The first portion includes an inner covering portion that covers the teeth portion and the coil is wound, an outer covering portion that is on the outer side in the radial direction and covers the annular portion, and the inner covering portion and the outer covering portion. Having a wall that partitions
The resolver according to claim 1, wherein a plurality of the opening portions are formed in the outer covering portion at intervals in the circumferential direction. Three or more projecting portions projecting radially outward are formed on the outer peripheral surface of the stator core at intervals in the circumferential direction, and the stator is fitted into the cylindrical portion at a position where the projecting portion is formed. ,
The resolver according to claim 1, wherein the opening is formed at a circumferential position corresponding to a position where the protrusion is formed. A resolver according to any one of claims 1 to 3;
An inner ring, an outer ring, and a rolling bearing that includes a rolling element that is rotatably disposed between the inner ring and the outer ring, and that rotatably supports the rotating shaft;
The resolver case member has an outer ring mounting portion to which an outer ring of the rolling bearing is mounted;
A rolling bearing device with a resolver, wherein the stator and the rolling bearing are assembled as a unit by the case member. A resolver assembling method for assembling an annular stator provided on the radially outer side of a rotor that rotates integrally with a rotating shaft, into a cylindrical portion of a cylindrical case member from one side in the axial direction,
An insulator in which an annular stator core that the stator has is covered from the axial direction, and an opening that exposes the stator core partially toward the one axial side is formed at intervals in the circumferential direction. With attached to the stator core,
A resolver characterized in that a jig is pressed against the stator core through the opening, and the stator core is pressed by the jig to fit the stator into the cylindrical portion of the case member from one axial direction. Assembly method.

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