JP2021010219A - Stator core mounting structure and resolver - Google Patents

Abstract

To prevent deterioration in magnetic characteristics of a stator core.SOLUTION: A stator core mounting structure includes: a stator core; a case; and a fixing member. The stator core has an annular body part. The case has an annular housing part that houses the body part inserted from one side in the axial direction, and a first flange part that extends radially outward from a peripheral edge on one side in the axial direction of the housing part. The fixing member is fixed at one end in the axial direction of the housing part in a state in which the main body part in a state of being housed in the housing part is pressed from one side in the axial direction.SELECTED DRAWING: Figure 2

Description

The present invention relates to a stator core mounting structure and a resolver.

Conventionally, resolvers that detect the rotation angle of rotating electric machines such as motors and generators have been known. Such a resolver includes, for example, a stator and a metal cover capable of accommodating the stator, and the stator is fixed to the cover by press-fitting the stator into the cover.

Japanese Unexamined Patent Publication No. 2006-90511

However, in the conventional resolver, since the stator is press-fitted into the metal cover, the magnetic characteristics of the stator may be lowered due to the stress applied to the stator, and the detection accuracy of the rotation angle may be lowered.

The present invention has been made in view of the above, and an object of the present invention is to provide a stator core mounting structure and a resolver capable of preventing the magnetic characteristics of the stator core from deteriorating.

In order to solve the above problems and achieve the object, the mounting structure of the stator core according to one aspect of the present invention includes a stator core, a case, and a fixing member. The stator core has an annular body portion. The case has an annular accommodating portion for accommodating the main body portion inserted from one side in the axial direction, and a flange portion extending radially outward from the peripheral edge on one side in the axial direction of the accommodating portion. The fixing member is fixed at one end in the axial direction of the accommodating portion while the main body portion accommodated in the accommodating portion is pressed from one side in the axial direction.

According to one aspect of the present invention, it is possible to prevent the magnetic characteristics of the stator core from deteriorating.

FIG. 1 is a perspective view of the mounting structure of the stator core according to the first embodiment as viewed from one side in the axial direction. FIG. 2 is an exploded perspective view showing a state before the main body portion of the stator core is accommodated in the accommodating portion of the case in the stator core mounting structure according to the first embodiment. FIG. 3 is a perspective view of the mounting structure of the stator core according to the second embodiment as viewed from one side in the axial direction. FIG. 4 is an exploded perspective view showing a state before the main body portion of the stator core is accommodated in the accommodating portion of the case in the stator core mounting structure according to the second embodiment. FIG. 5 is an exploded perspective view showing a state before the main body portion of the stator core is accommodated in the accommodating portion of the case in another configuration example of the stator core mounting structure according to the second embodiment. FIG. 6 is a perspective view of the mounting structure of the stator core according to the third embodiment as viewed from one side in the axial direction. FIG. 7 is an enlarged perspective view of a main part of the mounting structure of the stator core according to the third embodiment. FIG. 8 is an exploded perspective view showing a state before the main body portion of the stator core is accommodated in the accommodating portion of the case in the stator core mounting structure according to the third embodiment.

Hereinafter, the mounting structure of the stator core of the resolver according to the embodiment will be described with reference to the drawings. It should be noted that the embodiments described below do not limit the mounting structure of the stator core and the use of the resolver. In addition, it should be noted that the drawings are schematic, and the relationship between the dimensions of each element, the ratio of each element, and the like may differ from the reality. Further, there may be a portion where the relations and ratios of the dimensions of the drawings are different from each other.

(First Embodiment)
FIG. 1 is a perspective view showing the configuration of the stator core mounting structure 1 according to the first embodiment. FIG. 2 is an exploded perspective view showing a state before the main body portion 11 of the stator core 10 is accommodated in the accommodating portion 61 of the case 60 in the stator core mounting structure 1 according to the first embodiment.

(Structure of mounting structure of stator core)
First, the configuration of the stator core mounting structure 1 according to the first embodiment will be described with reference to FIGS. 1 and 2.

The stator core mounting structure 1 according to the first embodiment includes a stator core 10, an insulator 20, a coil 30, a terminal block 40, a lead wire holding portion 50, a case 60, and a fixing member 70.

In the following, as shown in FIGS. 1 and 2, the radial direction, the axial direction, and the circumferential direction of the stator core 10 will be defined and described. Here, the "radial direction" is a direction orthogonal to the rotation axis of a rotor (not shown) that rotates inside the stator core 10, and the "axial direction" is a direction that coincides with the axial direction of the rotation axis of the rotor. Yes, the "circumferential direction" is a direction that coincides with the rotation direction of the rotor.

The stator core 10 has a laminated structure in which a plurality of steel plates formed of a soft magnetic material such as an electromagnetic steel plate are laminated. The stator core 10 has a main body 11 and a plurality of teeth 12. The main body 11 is annular, and in this embodiment, it is annular. The main body 11 has a plurality of recesses 13 (4 in this embodiment) that are recessed inward in the radial direction from the outer peripheral surface.

A plurality of teeth 12 (10 in this embodiment) extend from the inner peripheral side of the main body 11 toward the center of the main body 11 (that is, in the radial direction). Further, a slot 14 which is a gap is formed between the adjacent teeth 12. The stator core 10 is formed by laminating a plurality of cores manufactured by pressing a steel plate such as an electromagnetic steel plate.

The insulator 20 is an insulating member, and is formed by, for example, injection molding of an insulating resin. The insulator 20 is formed by, for example, insert molding so that the stator core 10 is embedded therein, and covers the stator core 10 from both sides in the axial direction.

The plurality of coils 30 are formed by winding windings (not shown) around each of the plurality of teeth 12 via an insulator 20. The coil 30 is composed of an exciting winding and an output winding. Further, the output winding of the coil 30 is composed of a sin phase output winding that outputs a sin phase output signal and a cos phase output winding that outputs a cos phase output signal.

The terminal block 40 is integrally formed on the upper surface side (one side in the axial direction) of the insulator 20 and extends radially outward from the insulator 20. The terminal block 40 is provided with a plurality of terminals 41. A terminal block cover 42 that covers the terminal 41 is mounted on one side of the terminal block 40 in the axial direction.

The terminal 41 is formed of a conductive member such as metal. The terminal 41 has an entangled portion (not shown) that projects from the terminal block 40 to one side in the axial direction and stands on one end side. Then, the end of the winding forming the corresponding coil 30 is entwined with the entwined portion.

For example, the winding start of the exciting winding, the winding end of the exciting winding, the winding start of the sin phase output winding, the winding end of the sin phase output winding, and cos are attached to the entwined portion of the plurality of terminals 41. The winding start of the phase output winding and the winding end of the cos phase output winding are entwined.

Then, for example, by performing TIG (Tungsten Inert Gas) welding on the entwined portion where the end of the winding is entwined, the winding and the entwined portion can be electrically connected.

The other end of the terminal 41 is housed inside the lead wire holding portion 50. The lead wire holding portion 50 is integrally formed with the terminal block 40 and extends radially outward from the terminal block 40. An insertion portion (not shown) is formed in the lead wire holding portion 50, and a lead wire 100 extending from an external device (not shown) is inserted into the insertion portion to hold the lead wire 100.

Since the other end of the terminal 41 is exposed at the insertion portion of the lead wire holding portion 50, the lead wire 100 and the terminal 41 are electrically connected by inserting the lead wire 100 into the insertion portion. Can be connected. For example, the lead wire 100 and the terminal 41 can be electrically connected by performing resistance welding on a portion where the lead wire 100 and the other end of the terminal 41 come into contact with each other.

It is preferable that the insulator 20, the terminal block 40, and the lead wire holding portion 50 are integrally formed. As a result, the insulator 20, the terminal block 40, and the lead wire holding portion 50 can all be molded in a single molding step, so that the insulator 20, the terminal block 40, and the lead wire holding portion 50 can all be molded, so that the insulator 20, the terminal block 40, and the lead wire holding portion 50 can all be molded. Can be done.

The case 60 is formed by, for example, casting a metal material such as aluminum into a mold such as die casting, and has an accommodating portion 61, a first flange portion (flange portion) 62, a second flange portion 63, and a protruding portion 64. And a stepped portion 65 and an engaging convex portion 66, which are integrally formed. The accommodating portion 61 is annular, and in the present embodiment, it is annular. The accommodating portion 61 accommodates the main body portion 11 of the stator core 10.

The first flange portion 62 extends radially outward from the one peripheral edge of the accommodating portion 61 in the axial direction. Further, the first flange portion 62 is formed with a notch 67 in the middle in the circumferential direction. The notch 67 extends in the radial direction, and the terminal block 40 and the lead wire holding portion 50 can be inserted. Further, a plurality of (three in this embodiment) elongated holes 68 are formed in the first flange portion 62.

The elongated hole 68 can be used as an insertion hole for inserting a bolt for fixing the mounting structure 1 of the stator core to the housing of the rotary electric machine. The elongated hole 68 penetrates the first flange portion 62 in the axial direction and is formed in an arc shape along the circumferential direction of the first flange portion 62. The plurality of elongated holes 68 are arranged along the circumferential direction of the first flange portion 62.

For example, the plurality of elongated holes 68 are arranged at equal angular intervals along the circumferential direction of the first flange portion 62. The plurality of elongated holes 68 do not necessarily have to be arranged at equal angular intervals.

The second flange portion 63 extends radially inward from the other end of the accommodating portion 61 in the axial direction. In the second flange portion 63, when the main body portion 11 is accommodated in the accommodating portion 61, the other end portion of the main body portion 11 in the axial direction is placed on the second flange portion 63, and the second flange portion 63 is in the axial direction of the main body portion 11. Support the other end side.

The projecting portion 64 projects inward in the radial direction from the inner peripheral surface of the accommodating portion 61. That is, the accommodating portion 61 has an annular inner peripheral surface and a protruding portion 64 protruding inward in the radial direction from the inner peripheral surface. Further, the radial inner diameter of the second flange portion 63 is smaller than the radial outer diameter of the main body portion 11 of the stator core 10. As will be described later, the main body portion 11 of the stator core 10 is accommodated in the accommodating portion 61 of the case 60. In this state, the stator core 10 comes into contact with the second flange portion 63.

The step portion 65 is a flat surface connecting the inner peripheral surface of the accommodating portion 61, the inner peripheral surface of the first flange portion 62 located radially outside the inner peripheral surface of the accommodating portion 61, and these two inner peripheral surfaces. It is a portion formed from the portion, and is for arranging the fixing member 70. An engaging convex portion 66 is formed at one end of the step portion 65 in the axial direction of the accommodating portion 61. The engaging convex portion 66 extends from the step portion 65 to one side in the axial direction.

The fixing member 70 is made of a metal material such as aluminum. That is, the fixing member 70 is made of the same metal material as the case 60. The fixing member 70 has an arc shape (C shape), and in the present embodiment, it has an arc shape. That is, the fixing member 70 extends along the circumferential direction. The fixing member 70 has a plurality of engaging holes 71 (4 in this embodiment) that engage with the engaging convex portions 66.

(Assembly process of mounting structure of stator core)
Subsequently, the assembly process of the stator core mounting structure 1 according to the present embodiment will be described with reference to FIG.

First, in the circumferential direction, the recess 13 of the stator core 10 and the protruding portion 64 of the case 60 are aligned, and the terminal block 40 and the lead wire holding portion 50 are aligned with the notch 67 of the case 60 to align the stator core. The case 60 is arranged on the other side in the axial direction at 10.

Next, the main body 11 of the stator core 10 is inserted into the accommodating portion 61 of the case 60 from one side in the axial direction, the protruding portion 64 of the case 60 is fitted into the recess 13 of the stator core 10, and the notch 67 of the case 60 is fitted. The terminal block 40 and the lead wire holding portion 50 are fitted into the terminal block 40. In the state where these are fitted, the case 60 is restricted from rotating the stator core 10 in the circumferential direction. Further, in this state, the main body portion 11 of the stator core 10 is accommodated in the accommodating portion 61 of the case 60.

Next, in the circumferential direction, the engaging convex portion 66 of the case 60 and the engaging hole portion 71 of the fixing member 70 are aligned with each other, and the fixing member 70 is arranged on one side of the stator core 10 in the axial direction.

Next, the tip end portion of the engaging convex portion 66 of the case 60 is inserted into the engaging hole portion 71 of the fixing member 70, and the engaging convex portion 66 of the case 60 and the engaging hole portion 71 of the fixing member 70 are inserted. The main body 11 in the state of being housed in the housing 61 is pressed by the fixing member 70 from one side in the axial direction while being fitted and restricting the fixing member 70 from rotating in the circumferential direction with respect to the case 60.

Next, as shown in FIG. 1, with the engaging convex portion 66 inserted through the engaging hole portion 71, the tip portion of the engaging convex portion 66 protruding from the engaging hole portion 71 is laser welded to the fixing member 70 or the like. Weld by. In this state, the fixing member 70 is fixed at one end in the axial direction of the accommodating portion 61 while pressing the main body 11 in the accommodating portion 61 from one of the axial directions.

After that, the case 60 is fixed to the housing of a rotary electric machine (not shown), and a rotor (not shown) is arranged inside the stator core 10 in the radial direction to obtain a resolver.

The rotor has a plurality of cores, and the plurality of cores are laminated in the axial direction. The core is manufactured by pressing a steel plate formed of a soft magnetic material such as an electromagnetic steel plate. The rotor is attached to the shaft of a rotating electric machine (not shown).

By providing the rotor inside the mounting structure 1 of the stator core, the resolver according to the embodiment can be obtained. The resolver according to the embodiment is a VR (Variable Reluctance) type resolver. For example, the resolver is an inner rotor type resolver, and a rotor mounted on a shaft of a rotary electric machine (not shown) is arranged inside a mounting structure 1 of a stator core.

As described above, the stator core mounting structure 1 according to the present embodiment includes the stator core 10, the case 60, and the fixing member 70. The stator core 10 has an annular main body portion 11. The case 60 has an annular accommodating portion 61 for accommodating the main body portion 11 inserted from one side in the axial direction, and a first flange portion extending radially outward from the peripheral edge on one side of the accommodating portion 61 in the axial direction. It has 62 and. The fixing member 70 is fixed at one end of the accommodating portion 61 in the axial direction while the main body 11 accommodated in the accommodating portion 61 is pressed from one side in the axial direction. As a result, since the stator core 10 is not press-fitted into the case 60, stress is not applied to the stator core 10 and it is possible to prevent the magnetic characteristics of the stator core 10 from deteriorating.

Further, the case 60 of the stator core mounting structure 1 according to the embodiment extends radially inward from the axial end portion of the accommodating portion 61 and supports the other end portion of the main body portion 11 in the axial direction. It has a second flange portion 63. As a result, since the case 60 is not welded to the stator core 10 on the other side in the axial direction, it is possible to reliably prevent the magnetic characteristics of the stator core 10 from deteriorating.

Further, the fixing member 70 of the stator core mounting structure 1 according to the embodiment is formed of the same metal material as the case 60 and is welded to the case 60. This makes it easy to weld the fixing member 70 to the case 60 when the fixing member 70 is welded to the case 60.

Further, in the stator core mounting structure 1 according to the embodiment, in a state where the engaging convex portion 66 is inserted into the engaging hole portion 71, the tip portion of the engaging convex portion 66 protruding from the engaging hole portion 71 is a fixing member 70. It is welded to. As a result, since the case 60 and the fixing member 70 are not welded to the stator core 10, it is possible to reliably prevent the magnetic characteristics of the stator core 10 from deteriorating.

(Second Embodiment)
Next, the mounting structure 1b of the stator core of the resolver according to the second embodiment will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing the configuration of the stator core mounting structure 1b according to the second embodiment. FIG. 4 is an exploded perspective view showing a state before the main body portion 11 of the stator core 10 is accommodated in the accommodating portion 61A of the case 60A in the stator core mounting structure 1b according to the second embodiment.

The mounting structure 1b of the stator core according to the second embodiment is different from the mounting structure 1 of the stator core according to the first embodiment in the fixing structure of the fixing member 70A to the case 60A. Therefore, the parts where the mounting structure 1b of the stator core according to the second embodiment is different from the mounting structure 1 of the stator core according to the first embodiment will be described below, and the same parts are designated by the same reference numerals. The explanation will be omitted.

The case 60A has an accommodating portion 61A, a first flange portion (flange portion) 62A, a second flange portion 63A, and a step portion 65, and these are integrally formed. Further, unlike the case 60 of the first embodiment, the case 60A of the second embodiment does not have the protruding portion 64 and the engaging convex portion 66.

The accommodating portion 61A of the present embodiment is formed in an annular shape. Further, the accommodating portion 61A has a plurality of first engaging recesses 161 (four in the present embodiment) on the inner peripheral surface in the radial direction. The first engaging recess 161 is formed so as to be recessed outward in the radial direction from the inner peripheral surface. In other words, the accommodating portion 61A has a first engaging recess 161 located inside in the radial direction. In other words, the accommodating portion 61A of the case 60A of the second embodiment has a circular inner peripheral surface and a first engaging recess 161 recessed from the inner peripheral surface, and has a portion protruding from the inner peripheral surface. Not.

The second flange portion 63A has a plurality of through holes 162 (four in the present embodiment) penetrating the second flange portion 63A in the axial direction. The through hole 162 is arranged at a position corresponding to the first engaging recess 161 of the accommodating portion 61A in the circumferential direction.

The fixing member 70A has an arc shape, and in the present embodiment, it has an arc shape (C shape). That is, the fixing member 70A extends along the circumferential direction. The fixing member 70A has a plurality of second engaging recesses 171 (four in the present embodiment) on the inner peripheral surface in the radial direction. The second engaging recess 171 is formed so as to be recessed outward in the radial direction from the inner peripheral surface. In other words, the fixing member 70A has a second engaging recess 171 located inside in the radial direction. The second engaging recess 171 is arranged at a position corresponding to the first engaging recess 161 of the accommodating portion 61A in the circumferential direction.

(Assembly process of mounting structure of stator core)
Subsequently, the assembly process of the stator core mounting structure 1b according to the present embodiment will be described with reference to FIG. The stator core mounting structure 1b of the present embodiment uses a jig 180 for assembling the case 60A and the fixing member 70A to the stator core 10. The jig 180 has a plurality of columnar pins 181 extending in the axial direction (four in this embodiment). The pin 181 is arranged so as to correspond to the position of the through hole 162 of the case 60A in the circumferential direction.

The position of the through hole 162 of the case 60A is aligned with each of the pins 181 of the jig 180 in the circumferential direction. Next, the pin 181 of the jig 180 is inserted into each of the through holes 162 of the case 60A from the other side in the axial direction, and the pin 181 of the jig 180 is fitted into the first engaging recess 161 to cure. The case 60A is restricted from rotating in the circumferential direction with respect to the jig 180.

Next, in the circumferential direction, the recess 13 of the stator core 10 and the pin 181 of the jig 180 are aligned, and the terminal block 40 and the lead wire holding portion 50 of the stator core 10 and the notch 67 of the case 60A are positioned. At the same time, the stator core 10 is arranged on one side of the case 60A in the axial direction.

Next, the main body 11 of the stator core 10 is inserted into the accommodating portion 61A of the case 60A from one side in the axial direction, the pin 181 of the jig 180 is fitted into the recess 13 of the stator core 10, and the notch 67 of the case 60 is fitted. The terminal block 40 and the lead wire holding portion 50 are fitted to each other to restrict the stator core 10 from rotating in the circumferential direction with respect to the case 60A. In this state, the main body 11 of the stator core 10 is accommodated in the accommodating portion 61A of the case 60A.

Next, in the circumferential direction, the pin 181 of the jig 180 and the second engaging recess 171 of the fixing member 70A are aligned, and the fixing member 70A is arranged on one side of the stator core 10 in the axial direction.

Next, the pin 181 of the jig 180 is inserted into the second engaging recess 171 of the fixing member 70A, and the pin 181 of the jig 180 and the second engaging recess 171 of the fixing member 70A are fitted to each other to fit the jig 180. While restricting the rotation of the fixing member 70A in the circumferential direction, the fixing member 70A presses the main body 11 in the state of being housed in the housing portion 61A from one side in the axial direction.

Next, with the pin 181 fitted to the recess 13, the first engaging recess 161 and the second engaging recess 171, the outer peripheral edge of the fixing member 70A is laser-welded to the inner peripheral edge of the case 60A. Weld. In the present embodiment, the entire outer peripheral edge of the fixing member 70A is not welded to the inner peripheral edge of the case 60A. For example, in the circumferential direction, the outer peripheral edge of the fixing member 70A is formed only at an intermediate position between an arbitrary first engaging recess 161 and another first engaging recess 161 adjacent to the first engaging recess 161. , Welded to the inner peripheral edge of the case 60A. In the state where these are welded, the fixing member 70A is fixed at one end in the axial direction of the accommodating portion 61 while pressing the main body 11 in the accommodating portion 61 from one side in the axial direction. Will be done.

Then, the jig 180 is removed from the stator core 10, the case 60A, and the fixing member 70A.

After that, the case 60 is fixed to the housing of a rotary electric machine (not shown), and a rotor (not shown) is arranged inside the stator core 10 in the radial direction to obtain a resolver.

As described above, the fixing member 70A of the stator core mounting structure 1b according to the second embodiment has an arc shape, and the outer peripheral edge of the fixing member 70A is welded to the inner peripheral edge of the case 60A. As a result, since the stator core 10 is not press-fitted into the case 60A, stress is not applied to the stator core 10 and it is possible to prevent the magnetic characteristics of the stator core 10 from deteriorating.

Further, in the stator core mounting structure 1b according to the present embodiment, the accommodating portion 61A has a first engaging recess 161 located inside in the radial direction in the case 60A, and the fixing member 70A has a first engagement in the circumferential direction. It has a second engaging recess 171 that is arranged at a position corresponding to the joint recess 161 and is located inside in the radial direction. As a result, it is easy to grind the inner peripheral surface of the accommodating portion 61A, and the processing accuracy of the inner peripheral surface of the accommodating portion 61A can be improved.

In this embodiment, the case in which the second flange portion 63A has a through hole 162 penetrating in the axial direction and the jig 180 is arranged on the other side in the axial direction in the case 60A has been described. However, the present embodiment is not limited to this, and the second flange portion 63A may have a notch instead of the through hole 162. In addition, the jig 180 does not need to be arranged on the other side of the case 60A in the axial direction, and may be arranged on one side of the case 60A in the axial direction. In this case, it is not necessary to form the through hole 162 and the notch in the case 60A.

(Another configuration example of the second embodiment)
Next, the mounting structure of the stator core of the resolver according to another configuration example of the second embodiment will be described with reference to FIG. FIG. 5 is an exploded perspective view showing a state before the main body portion 11 of the stator core 10 is accommodated in the accommodating portion 61A of the case 60B in the stator core mounting structure 1c according to another configuration example of the second embodiment.

The case 60B in the stator core mounting structure 1c according to the other configuration of the second embodiment is different from the case 60A in the stator core mounting structure 1b according to the second embodiment in that it has a slit 261. Therefore, a portion where the mounting structure 1c of the stator core according to another configuration example of the second embodiment is different from the mounting structure 1b of the stator core according to the second embodiment will be described below, and the same parts are the same. The description will be omitted by adding the reference numerals.

The case 60B has an accommodating portion 61A, a first flange portion (flange portion) 62B, a second flange portion 63A, and a step portion 65B.

The first flange portion 62B and the step portion 65B are formed with slits 261 of a plurality of sets (4 sets in this embodiment) forming one set by two. A set of slits 261 is composed of one slit 261a that is close to the notch 67 in the circumferential direction and the other slit 261b that is relatively separated from the notch 67 with respect to one slit 261a. A set of slits 261 is arranged, for example, in the circumferential direction at an intermediate position between an arbitrary first engaging recess 161 and another first engaging recess 161 adjacent to the first engaging recess 161. There is.

(Assembly process of mounting structure of stator core)
Subsequently, the assembly process of the stator core mounting structure 1c according to the present embodiment will be described with reference to FIG.

Similar to the stator core mounting structure 1b of the second embodiment, the recess 13 of the stator core 10, the first engaging recess 161 of the case 60B, and the second engaging recess 171 of the fixing member 70A are fitted into the pin 181 of the jig 180. Match.

Next, in the circumferential direction of the set of slits 261 in the case 60B, the first flange portion 62B at the portion between the one slit 261a and the other slit 261b is crushed inward in the radial direction with a tool, and mechanically said. The part is crimped and deformed. As a result, the fixing member 70A is fixed at one end in the axial direction of the accommodating portion 61B while the main body 11 in the state of being accommodated in the accommodating portion 61B is pressed from one side in the axial direction.

As described above, the case 60B of the stator core mounting structure 1c according to the other configuration example of the second embodiment has slits 261 forming a set of two, and one slit 261a and the other in the circumferential direction. By crushing the first flange portion 62B between the slit 261b and the slit 261b inward in the radial direction, the fixing member 70A is fixed to the case 60B at one end in the axial direction of the accommodating portion 61B of the case 60B. As a result, since the stator core 10 is not press-fitted into the case 60B, stress is not applied to the stator core 10 and it is possible to prevent the magnetic characteristics of the stator core 10 from deteriorating.

(Third Embodiment)
Next, the mounting structure 1d of the stator core of the resolver according to the third embodiment will be described with reference to FIGS. 6 to 8. FIG. 6 is a perspective view showing the configuration of the stator core mounting structure 1d according to the third embodiment. FIG. 7 is an enlarged perspective view of a main part of the stator core mounting structure 1d according to the third embodiment. FIG. 8 is an exploded perspective view showing a state before the main body portion 11 of the stator core 10 is accommodated in the accommodating portion 61 of the case 60D in the stator core mounting structure 1d according to the present embodiment.

The mounting structure 1d of the stator core according to the third embodiment is different from the mounting structure 1 of the stator core according to the first embodiment in the fixing structure of the fixing member 70D to the case 60D. Further, a portion where the mounting structure 1d of the stator core according to the third embodiment is different from the mounting structure 1 of the stator core according to the first embodiment will be described below, and the same parts will be designated by the same reference numerals. The explanation will be omitted.

The case 60D has a housing portion 61, a first flange portion (flange portion) 62D, a second flange portion 63, and a protruding portion 64, which are integrally formed. Further, unlike the case 60 of the first embodiment, the case 60D of the third embodiment does not have the stepped portion 65 and the engaging convex portion 66. Further, the case 60D of the third embodiment has one protrusion 64.

The first flange portion 62D has a plurality of (two in the present embodiment) recesses 361 and a plurality of (two in the present embodiment) fastening holes 362. The recess 361 is formed in the first flange portion 62D so as to be recessed from the main surface 360 located at one end in the axial direction to the other side in the axial direction.

The recess 361 has a tool insertion portion 361a located on the outermost side in the radial direction, a first insertion portion 361b located on the inner side of the tool insertion portion 361a in the radial direction, and an inner side of the first insertion portion 361b in the radial direction. It has a second insertion section 361c located. The first insertion portion 361b is a portion into which the first portion 371b of the fixed main body portion 371 described later is inserted. The second insertion portion 361c is a portion into which the second portion 371c of the fixed main body portion 371 described later is inserted. The fastening hole 362 is arranged inside the recess 361, extends in the axial direction, and has a screw hole formed on the inner peripheral surface.

The fixing member 70D has a fixed main body portion 371 and a fastening portion 372 formed separately from the fixed main body portion 371. The fixed main body portion 371 has an annular first portion 371b having a through hole 371a penetrating in the axial direction and an arc-shaped (C-shaped) second portion 371c extending from the first portion 371b in the circumferential direction. .. The axial thickness dimension of the fixed main body portion 371 is smaller than the axial thickness dimension of the recess 361 of the case 60D.

The fastening portion 372 has a head portion 372a into which a tool such as a hexagonal bar wrench can be inserted, and a columnar threaded portion 372b extending axially from the head portion 372a. On the outer peripheral surface of the screw portion 372b, a screw that can be fastened to the screw hole of the fastening hole 362 is formed. The screw portion 372b can be inserted into the through hole 371a.

(Assembly process of mounting structure of stator core)
Subsequently, the assembly process of the stator core mounting structure 1d according to the present embodiment will be described with reference to FIG.

First, as shown in FIG. 8, the recess 13 of the stator core 10 and the protruding portion 64 of the case 60D are aligned in the circumferential direction, and the terminal block 40, the lead wire holding portion 50, and the notch 67 of the case 60D are aligned. The case 60D is arranged on the other side of the stator core 10 in the axial direction.

Next, the main body 11 of the stator core 10 is inserted into the accommodating portion 61 of the case 60D from one side in the axial direction, the protruding portion 64 of the case 60D is fitted into the recess 13 of the stator core 10, and the notch 67 of the case 60D is fitted. The terminal block 40 and the lead wire holding portion 50 are fitted into the case 60D to restrict the stator core 10 from rotating in the circumferential direction with respect to the case 60D. In this state, the main body 11 of the stator core 10 is housed in the housing 61 of the case 60D.

Next, the fixing main body portion 371 of the fixing member 70D is inserted into each of the recesses 361 of the case 60D. More specifically, the first portion 371b of the fixed main body portion 371 is inserted into the first insertion portion 361b of the recess 361, and the second portion 371c of the fixed main body portion 371 is inserted into the second insertion portion 361c of the recess 361.

When the fixed main body portion 371 of the fixing member 70D is inserted into the recess 361 of the case 60D, the fastening hole 362 of the case 60D and the through hole 371a of the fixed main body portion 371 match. Further, in this state, the tool insertion portion 361a of the recess 361 is exposed from the first flange portion 62D, and if the fixed main body portion 371 is erroneously inserted, the tool is inserted into the tool insertion portion 361a. The fixed main body 371 can be removed from the case 60D.

Next, a tool such as a hexagon wrench is inserted into the head portion 372a of the fastening portion 372, the screw portion 372b of the fastening portion 372 and the fastening hole 362 of the case 60D are fastened, and one side of the accommodating portion 61 in the axial direction is fastened. At the end, the fixing member 70D is fixed to the case 60D.

In a state where the fixing member 70D is fixed to the case 60D by the fastening hole 362 of the case 60D and the screw portion 372b of the fastening portion 372 at one end of the accommodating portion 61 in the axial direction, the first portion of the fixing main body portion 371. The two portions 371c project from above the main surface 360 of the first flange portion 62D, beyond the inner peripheral surface of the accommodating portion 61 of the case 60D, inward in the radial direction. Therefore, the fixing member 70D is fixed at one end in the axial direction of the accommodating portion 61 while the main body 11 in the accommodating portion 61 is pressed from one side in the axial direction.

As described above, the stator core mounting structure 1d according to the present embodiment includes the stator core 10, the case 60D, and the fixing member 70D. The first flange portion 62d of the case 60D has a fastening hole 362. The fixing member 70D includes a fixed main body portion 371 having a first portion 371b having a through hole 371a penetrating in the axial direction, a second portion 371c extending in the circumferential direction from the first portion 371b, and a fixed main body portion 371. Is separately formed and includes a fastening portion 372 that can be inserted into the through hole 371a and fastened to the fastening hole 362. As a result, since the stator core 10 is not press-fitted into the case 60D, stress is not applied to the stator core 10 and it is possible to prevent the magnetic characteristics of the stator core 10 from deteriorating. In addition, since the fixing member 70D is fixed to the case 60D by the fastening hole 362 of the case 60D and the screw portion 372b of the fastening portion 372, the fixing member 70D can be easily removed from the case 60D.

Further, in the stator core mounting structure 1d according to the present embodiment, the axial thickness dimension of the fixed main body portion 371 is smaller than the axial dimension of the recess 361 of the case 60D. As a result, it is possible to prevent the fixed main body portion 371 from projecting from the main surface 360 of the first flange portion 62D of the case 60D to one side in the axial direction.

Further, a spring washer may be arranged between the case 60D and the fastening portion 372 to prevent the fastening portion 372 from loosening with respect to the case 60D.

In this embodiment, the stator core 10 has the recess 13, while the case 60D has the protrusion 64. However, the present embodiment is not limited to this, and is arranged at a position corresponding to the recess 13 of the stator core 10 in the circumferential direction, and a recess 13 recessed outward in the radial direction is provided on the inner peripheral surface of the case 60D, and the recess 13 of the stator core 10 is provided. , And a jig having a pin fitted in the recess of the case 60D may be used to form the stator core mounting structure 1d.

Further, in the present embodiment described above, a lead wire 100 extending in the radial direction is inserted into the insertion portion of the stator core mounting structures 1, 1b, 1c, 1d and the lead wire holding portion 50 of the resolver. .. However, the present embodiment is not limited to this, and a lead wire extending in the axial direction may be inserted into the insertion portion of the lead wire holding portion 50. Further, the connector housing may be provided on the stator core mounting structure 1 and the resolver instead of providing the lead wire holding portion 50.

Further, in the above-described embodiment, the stator core mounting structures 1, 1b, 1c, 1d and the resolver having a terminal block cover 42 for covering the terminal 41 provided on the terminal block 40 have been described. However, the present embodiment is not limited to this, and the stator core mounting structures 1, 1b, 1c, 1d and the resolver do not have to have the terminal block cover 42 that covers the terminal 41 provided on the terminal block 40.

Further, in the above-described embodiment, the starter core mounting structures 1, 1b, 1c, 1d and the resolver do not have a coil cover for covering the coil 30. However, the present embodiment is not limited to this, and the starter core mounting structures 1, 1b, 1c, 1d and the resolver may have a coil cover that covers the coil 30 from the axial direction.

Furthermore, the present invention is not limited to the above embodiments. The present invention also includes a configuration in which the above-mentioned components are appropriately combined. Further, further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.

1, 1b, 1c, 1d stator core mounting structure, 10 stator core, 11 main body, 60, 60A, 60B, 60D case, 61, 61A accommodating part, 62, 62D first flange part (flange part), 63, 63A 2 Flange, 66 Engagement convex, 70, 70A, 70D Fixing member, 71 Engagement hole, 161 First engagement recess, 171 Second engagement recess, 362 Fastening hole, 371 Fixing body, 371a Through hole , 371b 1st part, 371c 2nd part, 372 fastening part

Claims (8)

A stator core with an annular body and
A case having an annular accommodating portion for accommodating the main body portion inserted from one side in the axial direction, and a flange portion extending outward in the radial direction from the peripheral edge of the accommodating portion on one side in the axial direction.
A fixing member fixed at one end of the accommodation portion in the axial direction while the main body portion accommodated in the accommodation portion is pressed from one side in the axial direction.
Mounting structure of the stator core. The case has a second flange portion that extends inward in the radial direction from the other end of the housing portion in the axial direction and supports the other end of the main body portion in the axial direction. ,
The mounting structure of the stator core according to claim 1. The fixing member is made of the same metal material as the case and is welded to the case.
The mounting structure of the stator core according to claim 1 or 2. The case has an engaging protrusion that extends in the axial direction.
The fixing member has an engaging hole portion that engages with the engaging convex portion.
With the engaging convex portion inserted into the engaging hole portion, the tip portion of the engaging convex portion protruding from the engaging hole portion is welded to the fixing member.
The mounting structure for the stator core according to any one of claims 1 to 3. The fixing member has an arc shape and has an arc shape.
The outer peripheral edge of the fixing member is welded to the inner peripheral edge of the case.
The mounting structure for the stator core according to any one of claims 1 to 3. The housing portion of the case has a first engaging recess located inside the radial direction.
The fixing member is arranged at a position corresponding to the first engaging recess in the circumferential direction, and has a second engaging recess located inside in the radial direction.
The mounting structure of the stator core according to claim 5. The flange portion has a fastening hole and has a fastening hole.
The fixing member is a separate body from the fixed main body portion having a first portion having a through hole penetrating in the axial direction, a second portion extending from the first portion in the circumferential direction, and the fixed main body portion. It is provided with a fastening portion that can be inserted into the through hole and can be fastened to the fastening hole.
The mounting structure for the stator core according to any one of claims 1 to 3. With the rotor
The mounting structure of the stator core according to any one of claims 1 to 7,
With a resolver.