JP7258097B1 - Rotating electric machine - Google Patents

Abstract

An object of the present invention is to provide a rotating electrical machine in which a resin impregnated in a field coil is prevented from extending from the end face of a spacer portion on the side of the field core to the end face of the spacer portion on the side of the front bearing. A rotating shaft (22) rotatably supported by a front bearing (7) and a rear bearing (8), and a field core (2b) supported by the rotating shaft (22) impregnated with resin. A spacer portion disposed between the rotor (2) around which the field coil (2a) is wound, the field core (2b) and the front bearing (7), and formed integrally with the rotating shaft (22). (23), wherein the resin impregnated in the field coil (2a) is applied to the spacer portion (23) on the field core (2b) side of the spacer portion (23). A stretch suppressing portion (24) is provided to suppress stretching from the end face to the end face on the side of the front bearing (7). [Selection drawing] Fig. 1

Description

The present application relates to a rotating electric machine.

The rotating electric machine of Patent Document 1 has a rotor provided with a rotating shaft integrally formed with a spacer.
In this rotary electric machine, on the belt drive side, which is one free end of the rotary shaft, the parts provided on the rotary shaft together with the nut are, in order from the side opposite to the belt drive side, a spacer integrally formed with the rotary shaft, and a front bearing part. , has a pulley.

Patent document 2 also discloses a rotor in which a field coil wound around a resin bobbin is impregnated with a thermosetting resin to improve the electrical insulation performance and mechanical strength of the field coil.

Patent Literature 3 discloses a bearing component that suppresses flaking accompanied by white texture change by imparting electrical conductivity.

French Patent Application No. 3054742 Japanese Patent Application Laid-Open No. 2008-29102 JP 2016-194348 A

In the rotor of the rotary electric machine disclosed in the conventional patent document 1 mentioned above, since the spacer is integrally formed with the rotating shaft, there is a problem that the end surface of the spacer portion comes into direct contact with the bearing component.

On the other hand, in the rotor of the automotive alternator disclosed in Patent Document 2, when the field coil is impregnated with the thermosetting resin, depending on the degree of impregnation of the resin or the impregnation method, the surplus resin applied may rotate. There was a problem that it may reach the shaft.

Therefore, when the field coil of the rotor of the conventional rotary electric machine disclosed in Patent Document 1 is impregnated with a thermosetting resin, it is conceivable that the resin flows and spreads over the end surface of the spacer portion of the rotating shaft. If the resin flows and hardens on the end surface of the spacer portion of the rotating shaft, the resin will be sandwiched when the front bearing and pulley are fastened together. There was a problem that there was a risk of causing a slip.

Further, although the resin can be removed by processing the end face of the spacer portion of the rotating shaft after being impregnated with the thermosetting resin, there is a problem that the productivity deteriorates.

Furthermore, the bearing component disclosed in Patent Document 3 contains conductive grease, and the conductive grease causes flaking accompanied by white structure change caused by hydrogen embrittlement due to static electricity from friction between the belt and the pulley. suppressing. If this conductive grease is mixed with insulating foreign matter, it loses its electrical conductivity, causing delamination accompanied by a change in white structure due to hydrogen embrittlement due to static electricity, which hinders the rotation of the rotating electric machine. was there.

The present application discloses a technique for solving the above-described problems, and the purpose thereof is to provide a resin impregnated in the field coil from the end face of the spacer portion on the side of the field core to the end face of the front bearing side. To provide a rotating electric machine capable of suppressing the elongation of the

A rotary electric machine disclosed in the present application includes a rotating shaft rotatably supported by a front bearing and a rear bearing, and a field coil supported by the rotating shaft and having a field core impregnated with resin wound thereon. and a spacer portion disposed between the field core and the front bearing and formed integrally with the rotating shaft, the end surface of the spacer portion on the field core side. is in contact with the field core, the end face of the spacer portion on the side of the front bearing is in contact with the end face of the inner ring of the front bearing, and the spacer portion has the end face of the spacer portion on the side of the field core to the end face of the spacer portion on the side of the front bearing is formed longer than the distance between the field core and the inner ring of the front bearing, and the resin impregnated in the field coil extends to the spacer portion is provided with an extension suppressing portion for suppressing extension from the end surface on the side of the field core to the end surface on the side of the front bearing.

According to the rotary electric machine disclosed in the present application, the extension suppressing portion is provided in the spacer portion, so that the resin impregnated in the field coil is prevented from extending from the end surface of the spacer portion on the side of the field core to the end surface on the side of the front bearing. It is possible to obtain a rotary electric machine capable of suppressing the stretching of the resin impregnated in the field coil from the end face of the spacer portion on the side of the field core to the end face of the front bearing.

1 is a cross-sectional view showing a rotating electric machine according to Embodiment 1; FIG. 1 is an enlarged cross-sectional view of a main part showing a rotating electric machine according to Embodiment 1; FIG. FIG. 7 is a cross-sectional view showing a rotating shaft in a rotating electrical machine according to Embodiment 2; FIG. 7 is a cross-sectional view showing a rotating shaft in a rotating electrical machine according to Embodiment 2; FIG. 7 is a cross-sectional view showing a rotating shaft in a rotating electrical machine according to Embodiment 2; FIG. 11 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 3; FIG. 11 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 3; FIG. 11 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 4; FIG. 11 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 5; FIG. 11 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 6; FIG. 14 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 7;

Embodiment 1.
Embodiment 1 of the present application will be described below with reference to FIGS. 1 and 2. In each figure, the same or corresponding members and parts are denoted by the same reference numerals. FIG. 1 is a cross-sectional view showing a rotating electric machine according to Embodiment 1. FIG. FIG. 2 is an enlarged cross-sectional view of a main part showing the rotating electric machine according to Embodiment 1. FIG.

The rotating electrical machine according to Embodiment 1 is a controller-integrated rotating electrical machine, is mounted on a vehicle, and is used for driving assistance and power generation. A controller-integrated rotating electric machine 1 integrally includes a rotating electric machine main body 1a and a controller 1b. The rotary electric machine main body 1a includes a rotor 2, a stator 3, a front bracket 4, a rear bracket 5, a front bearing 7, a rear bearing 8, a cooling fan 20 for the front bearing 7, a cooling fan 21 for the rear bearing 8, and a rotating shaft 22. is configured with

A stator winding 3 a is wound around the stator 3 . A rotor 2 is provided on the inner peripheral side of the stator 3 . The rotor 2 is constructed by winding a field coil 2a around a field core 2b. The field coil 2a is impregnated with resin (such as epoxy resin). A front bracket 4 and a rear bracket 5 are arranged at both ends of the stator 3 in the axial direction. The front bracket 4 and the rear bracket 5 are provided as a pair of brackets so as to support the stator 3 .

A pulley 12 is provided on one end side 22 a of the rotating shaft 22 protruding from the front bracket 4 . The pulley 12 is fastened to the rotating shaft 22 by a male thread (not shown) formed on one end 22a of the rotating shaft 22 and a nut 14 screwed onto the male thread. Accordingly, the pulley 12 is fitted to the one end side 22a of the rotary shaft 22 so as to be rotatable integrally with the rotary shaft 22. As shown in FIG.

A rotation position detection sensor 6 for detecting the rotation state of the rotor 2 is provided on the other end 22b of the rotation shaft 22 projecting from the rear bracket 5 on the other side. Further, a pair of slip rings 13 for supplying current to the field coil 2a is provided on the rotating shaft 22 on the other end side 22b of the rotating position detection sensor 6. As shown in FIG. A pair of brushes 17 are provided outside the rear bracket 5 so as to be in sliding contact with the slip ring 13 . A brush 17 is held by a brush holder 16 .

Next, the control device 1b will be explained. The control device 1b includes a power circuit section, a field circuit section, and a control circuit section. However, none of the power circuit section, the field circuit section and the control circuit section are shown in FIG. The power circuit section is electrically connected to the stator windings 3a. The field circuit section is electrically connected to the field coil 2a. The control circuit section controls the power circuit section and the field circuit section.

Next, the operation of the controller-integrated rotating electrical machine 1 will be described with reference to FIGS. 1 and 2. FIG. The controller-integrated rotary electric machine 1 has a function of an electric motor for assisting the drive of a vehicle and a function of a generator for power generation.

First, the case where the controller-integrated rotary electric machine 1 functions as an electric motor will be described. DC power supplied from an external battery (not shown) to the power circuit section is converted into three-phase AC current by on/off control of the power circuit section and supplied to the stator windings 3a.

Also, the DC power supplied from the external battery is adjusted in the field circuit section and supplied to the field coil 2a. This supply produces a rotating magnetic field around the field coil 2 a , and as a result, the rotor 2 rotates together with the rotating shaft 22 .

Rotation of the rotating shaft 22 is transmitted from the pulley 12 to the engine via a transmission belt (not shown). Further, the control circuit section controls the power circuit section and the field circuit section based on information from an external device (not shown) and the rotational position detection sensor 6 .

Next, a case where the controller-integrated rotary electric machine 1 functions as a generator will be described. When the engine rotates, the rotational force of the engine is transmitted to the rotating shaft 22 via the transmission belt and pulley 12 . As a result, the rotor 2 rotates and three-phase AC power is excited in the stator windings 3a.

The control circuit section controls on/off of the power circuit section to convert the three-phase AC power excited in the stator windings 3a into DC power. The converted DC power is supplied to an external battery and charged.

Embodiment 1 of the present application employs a structure in which a rotating shaft 22 has a spacer portion 23 . The spacer portion 23 is arranged between the field core 2b and the front bearing 7 and is formed integrally with the rotary shaft 22. As shown in FIG. The front bearing 7 is composed of an inner ring 7a, an outer ring 7b, balls 7c, and a seal member 7d. Of the side surfaces of the inner ring 7 a of the front bearing 7 , the side surface of the inner ring 7 a located on the side opposite to the pulley 12 is in contact with the spacer portion 23 . The surface of the spacer portion 23 with which the side surface of the inner ring 7a of the front bearing 7 contacts is the end surface of the fastening section to which the nut 14 is fastened. As a result, the members fastened by tightening the nut 14 are limited to the pulley 12 and the front bearing 7 .

FIG. 2 is an enlarged cross-sectional view of a main part showing the rotary electric machine according to Embodiment 1 of the present application, showing an enlarged view of the rotating shaft and its surroundings. The spacer portion 23 is provided with an extension suppressing portion 24 that suppresses extension of the resin impregnated in the field coil 2a from the end surface 23a of the spacer portion 23 on the side of the field core 2b to the end surface 23b on the side of the front bearing 7. . The extension suppressing portion 24 is formed by forming a long path along which the resin impregnated in the field coil 2 a extends with respect to the horizontal surface 23 c of the spacer portion 23 parallel to the central axis of the rotating shaft 22 .

For example, the extension suppressing portion 24 is configured to have a height difference with respect to the horizontal surface 23 c of the spacer portion 23 that is horizontal to the center axis of the rotating shaft 22 . As shown in FIG. 2, the extension suppressing portion 24 is composed of a tapered portion 24c formed so as to be inclined from the horizontal surface 23c of the spacer portion 23 toward the central axis side of the rotating shaft 22 on the side of the field core 2b. indicates the case.

The extension suppressing portion 24 configured as described above prevents the resin impregnated in the field coil 2a from extending from the end surface 23a of the spacer portion 23 on the side of the field core 2b toward the end surface 23b on the side of the front bearing 7. can be suppressed.

In addition, by providing the end surface 23a on the side of the field core 2b to the end surface 23b on the side of the front bearing 7 in a shape different from a straight line parallel to the central axis of the rotating shaft 22, the impregnated resin or the field core when manufacturing the rotor can be 2b is prevented from adhering to the end surface 23b of the spacer portion 23 on the front bearing 7 side. When the rotor 2 is incorporated in the rotary electric machine 1, it is possible to prevent foreign matter from entering from the interface between the inner ring 7a of the front bearing 7 and the seal member 7d.

According to the rotary electric machine according to Embodiment 1 of the present application, the extension suppressing portion 24 that suppresses extension of the liquid resin spacer portion 23 to the end surface 23a on the side of the field core 2b with which the field coil 2a is impregnated is the rotating shaft. 22, it is possible to suppress the adhesion of resin to the end surface 23a of the spacer portion 23, which is integrally formed with the rotating shaft 22 and is in contact with the bearing component, on the side of the field core 2b. It is possible to make it difficult for the failure of the electric machine to occur, and to improve the reliability.

In addition, since there is no need to process the end surface of the spacer portion 23 of the rotating shaft 22 after impregnating the field coil 2a with the resin, productivity can be improved. Furthermore, since it also contributes to suppressing the intrusion of insulating foreign matter from the end face of the spacer portion 23 integrally formed with the rotary shaft 22 with respect to the front bearing 7 of the rotary electric machine 1, the failure of the front bearing 7 is less likely to occur. , and the durability of the rotating electric machine 1 can be improved.

Embodiment 2.
FIG. 3 is a cross-sectional view showing a rotating shaft in a rotating electrical machine according to Embodiment 2. FIG. FIG. 4 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 2. FIG. FIG. 5 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 2. FIG.

The extension suppressing portion 25 of the spacer portion 23 integrally formed with the rotating shaft 22 of the rotary electric machine 1 according to Embodiment 2 shown in FIG. A case is shown in which D1 is formed to have an outer diameter smaller than the outer diameter D2 of the second outer diameter portion 25b on the front bearing 7 side.

That is, by setting the relationship between the first outer diameter portion 25a and the second outer diameter portion 25b to have a height difference of D1<D2, the resin impregnated in the field coil 2a is placed on the field core 2b side of the spacer portion 23. can be suppressed from extending from the end surface 23a side toward the end surface 23b on the front bearing 7 side.

Further, as shown in FIG. 4, the extension suppressing portion 26 of the spacer portion 23 consists of a first outer diameter portion 26a of the spacer portion 23 on the field core 2b side and a second outer diameter portion of the spacer portion 23 on the front bearing 7 side. 26b, and at least one protrusion 26c is provided between them.

That is, the first outer diameter portion 26a and the second outer diameter portion 26b have the same outer diameter D1, and the outer diameter D3 of the convex portion 26c is larger than the outer diameter D1. By setting the relationship between the outer diameter D1 of the diameter portion 26b and the outer diameter D3 of the convex portion 26c to be a height difference of D1<D3, the resin impregnated in the field coil 2a moves toward the field core 2b side of the spacer portion 23. can be suppressed from extending from the end surface 23a side toward the end surface 23b on the front bearing 7 side. A plurality of protrusions 26c may be provided.

Furthermore, as shown in FIG. 5, the extension suppressing portion 27 of the spacer portion 23 is composed of a first outer diameter portion 27a of the spacer portion 23 on the field core 2b side and a second outer diameter portion of the spacer portion 23 on the front bearing 7 side. 27b is provided with at least one convex portion 27c. The convex portion 27c is configured as a tapered portion that is inclined from the first outer diameter portion 27a toward the convex portion 27c.

That is, the first outer diameter portion 27a and the second outer diameter portion 27b have the same outer diameter D1, and the outer diameter D3 of the convex portion 27c is larger than the outer diameter D1. By setting the relationship between the outer diameter D1 of the diameter portion 27b and the outer diameter D3 of the convex portion 27c to be a height difference of D1<D3, the resin impregnated in the field coil 2a moves toward the field core 2b side of the spacer portion 23. can be suppressed from extending from the end surface 23a side toward the end surface 23b on the front bearing 7 side. Along with this, it is possible to improve the reliability of the rotary electric machine. A plurality of protrusions 27c may be provided.

Embodiment 3.
FIG. 6 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 3. FIG. FIG. 7 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 3. FIG.

The extension suppressing portion 28 of the spacer portion 23 integrally formed with the rotating shaft 22 of the rotary electric machine 1 according to Embodiment 3 shown in FIG. 23 and the second outer diameter portion 28b on the side of the front bearing 7 are provided with at least one concave portion 28c.

That is, the first outer diameter portion 28a and the second outer diameter portion 28b have the same outer diameter D1, and the outer diameter D4 of the concave portion 28c is smaller than the outer diameter D1. By setting the relationship between the outer diameter D1 of the portion 28b and the outer diameter D4 of the recess 28c to be a height difference of D1>D4, the resin impregnated in the field coil 2a is applied to the end surface of the spacer portion 23 on the side of the field core 2b. Extending from the 23a side toward the end face 23b on the front bearing 7 side can be suppressed. Along with this, it is possible to improve the reliability of the rotary electric machine. A plurality of recesses 28c may be provided.

Further, as shown in FIG. 7, the extension suppressing portion 29 of the spacer portion 23 consists of a first outer diameter portion 29a of the spacer portion 23 on the field core 2b side and a second outer diameter portion of the spacer portion 23 on the front bearing 7 side. 29b, and at least one recess 29c is provided between them. This recessed portion 29c is configured as a tapered portion that is inclined from the first outer diameter portion 29a toward the recessed portion 29c.

That is, the first outer diameter portion 29a and the second outer diameter portion 29b have the same outer diameter D1, and the outer diameter D4 of the concave portion 29c is smaller than the outer diameter D1. By setting the relationship between the outer diameter D1 of the portion 29b and the outer diameter D4 of the recessed portion 29c to be a height difference of D1>D4, the resin impregnated in the field coil 2a is applied to the end face of the spacer portion 23 on the side of the field core 2b. Extending from the 23a side toward the end face 23b on the front bearing 7 side can be suppressed. Along with this, it is possible to improve the reliability of the rotary electric machine. A plurality of recesses 29c may be provided.

Embodiment 4.
FIG. 8 is a cross-sectional view showing the rotating shaft in the rotating electrical machine according to Embodiment 4, and shows the extension suppressing portion 30 of the spacer portion 23 integrally formed with the rotating shaft 22 of the rotating electrical machine.

The extension suppressing portion 30 is inclined from a small-diameter first outer diameter portion 30a on the end surface of the spacer portion 23 on the side of the field core 2b to a second large-diameter portion 30b on the end surface of the spacer portion 23 on the front bearing 7 side. A case is shown in which at least one tapered portion 30c is connected to each other.

That is, the first outer diameter portion 30a of the end face has an outer diameter D5, the second outer diameter portion 30b of the end face has an outer diameter D6, and the outer diameter D5 of the first outer diameter portion 30a and the outer diameter of the second outer diameter portion 30b The relationship with D6 is the tapered portion 30c having a height difference of D5<D6. The extension suppressing portion 30 configured as described above prevents the resin impregnated in the field coil 2a from extending from the end surface 23a of the spacer portion 23 on the side of the field core 2b toward the end surface 23b on the side of the front bearing 7. can be suppressed. Along with this, it is possible to improve the reliability of the rotary electric machine. A plurality of tapered portions 30c having different inclination angles may be provided.

Embodiment 5.
FIG. 9 is a cross-sectional view showing a rotating shaft in a rotating electrical machine according to Embodiment 5. FIG. FIG. 11 is a cross-sectional view showing an extension suppressing portion 31 of a spacer portion 23 integrally formed with a rotating shaft 22 of a rotary electric machine according to Embodiment 5;

The extension suppressing portion 31 has an outer diameter D7 of a first outer diameter portion 31a of the spacer portion 23 on the side of the field core 2b smaller than an outer diameter D8 of a second outer diameter portion 31b of the spacer portion 23 on the side of the front bearing 7. A case is shown in which at least one tapered portion 31c formed as a diameter and connecting the first outer diameter portion 31a and the second outer diameter portion 31b at an angle is formed.

That is, the first outer diameter portion 31a has an outer diameter D7, the second outer diameter portion 31b has an outer diameter D8, and the relationship between the outer diameter D7 of the first outer diameter portion 31a and the outer diameter D8 of the second outer diameter portion 31b is a tapered portion 31c having a height difference of D7<D8. The extension suppressing portion 31 configured as described above prevents the resin impregnated in the field coil 2a from extending from the end surface 23a of the spacer portion 23 on the side of the field core 2b toward the end surface 23b on the side of the front bearing 7. can be suppressed. Along with this, it is possible to improve the reliability of the rotary electric machine. A plurality of tapered portions 31c having different inclination angles may be provided.

Embodiment 6.
FIG. 10 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 6. FIG. FIG. 11 is a cross-sectional view showing an extension suppressing portion 32 of a spacer portion 23 integrally formed with a rotating shaft 22 of a rotary electric machine according to Embodiment 6;

The extension suppressing portion 32 is configured by forming a first end face portion 32a and a second end face portion 32b on the end face of the spacer portion 23 on the front bearing 7 side. That is, the surface of the end surface 23b of the spacer portion 23 on the side of the front bearing 7 that contacts the inner ring 7a of the front bearing 7 is defined as a first end surface portion 32a, and the second end surface portion 32b is formed by connecting the outer peripheral portion of the spacer portion 23 to the inner ring of the front bearing 7. 7a, the outer diameter part is extended to the outer peripheral side of the inner ring 7a of the front bearing 7, and the surface of the extended part is the second end face part 32b.

The extension suppressing portion 32 configured in this way extends the width of the spacer portion 23 from the end surface 23a of the spacer portion 23 on the side of the field core 2b to the surface of the end surface 23b on the side of the front bearing 7 that contacts the inner ring 7a of the front bearing 7. is defined as a first width dimension T1, and the width of the spacer portion 23 at the extended portion of the outer peripheral portion of the spacer portion 23 is defined as a second width dimension T2.

The second width dimension T2 of the second end face portion 32b is made larger than the first width dimension T1 of the first end face portion 32a. By setting the relationship between the first width dimension T1 and the second width dimension T2 of the extension suppressing portion 32 to have a length difference of T1<T2, the resin impregnated in the field coil 2a is pushed to the field core 2b side of the spacer portion 23. can be suppressed from extending from the end surface 23a side toward the end surface 23b on the front bearing 7 side. Along with this, it is possible to improve the reliability of the rotary electric machine.

Embodiment 7.
11 is a cross-sectional view showing a rotating shaft in a rotating electric machine according to Embodiment 7. FIG. FIG. 13 is a cross-sectional view showing an extension suppressing portion 32 of a spacer portion 23 integrally formed with a rotary shaft 22 of a rotary electric machine according to Embodiment 6;

The extension suppressing portion 33 is composed of at least one curved portion 33c connecting the spacer portion 23 on the field core 2b side to the spacer portion 23 on the front bearing 7 side. That is, the extension suppressing portion 33 extends from the small-diameter first outer diameter portion 33a of the end face of the spacer portion 23 on the side of the field core 2b to the large-diameter second outer diameter portion 33b of the end face of the spacer portion 23 on the front bearing 7 side. A case is shown in which at least one curved portion 33c connected with an inclination is formed.

That is, the first outer diameter portion 33a of the end face has an outer diameter D9, the second outer diameter portion 33b of the end face has an outer diameter D10, and the outer diameter D9 of the first outer diameter portion 33a and the outer diameter of the second outer diameter portion 33b The relationship with D10 is the curved portion 33c where the height difference is D9<D10. The extension suppressing portion 33 configured as described above prevents the resin impregnated in the field coil 2a from extending from the end surface 23a of the spacer portion 23 on the side of the field core 2b toward the end surface 23b on the side of the front bearing 7. can be suppressed. Along with this, it is possible to improve the reliability of the rotary electric machine. A plurality of curved portions 33c having different curved angles may be provided.

In each of the above-described embodiments, a generator motor using a transmission belt was described as an example of the rotating electrical machine, but the present invention can also be applied to a rotating electrical machine such as an AC generator, and the same effects can be obtained.

While this application describes various exemplary embodiments and examples, various features, aspects, and functions described in one or more embodiments may not apply to particular embodiments. can be applied to the embodiments singly or in various combinations.
Accordingly, numerous variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, modification, addition or omission of at least one component, extraction of at least one component, and combination with components of other embodiments shall be included.

The present application is suitable for realizing a rotating electric machine capable of suppressing extension of the resin impregnated in the field coil from the end face of the spacer portion on the side of the field core to the end face of the spacer portion on the side of the front bearing.

1: rotating electrical machine, 1a: rotating electrical machine main body, 1b: control device, 2: rotor, 2a: field coil, 2b: field core, 3: stator, 3a: stator winding, 7: front bearing, 7a: inner ring, 8: rear bearing, 22: rotating shaft, 23: spacer portion, 23a: end surface, 23b: end surface, 23c: horizontal surface, 24: extension suppressing portion, 24c: taper portion, 25: extension suppressing portion, 25a : first outer diameter portion, 25b: second outer diameter portion, 26: elongation suppression portion, 26a: first outer diameter portion, 26b: second outer diameter portion, 26c: convex portion, 27: elongation suppression portion, 27a: First outer diameter portion 27b: Second outer diameter portion 27c: Convex portion 28: Stretch suppressing portion 28a: First outer diameter portion 28b: Second outer diameter portion 28c: Concave portion 29: Stretch suppressing portion , 29a: first outer diameter portion, 29b: second outer diameter portion, 29c: recessed portion, 30: stretch suppressing portion, 30a: first outer diameter portion, 30b: second outer diameter portion, 30c: tapered portion, 31: Extension suppressing portion 31a: First outer diameter portion 31b: Second outer diameter portion 31c: Tapered portion 32: Extension suppressing portion 32a: First end surface portion 32b: Second end surface portion 33: Extension suppressing portion , 33a: first outer diameter portion, 33b: second outer diameter portion, 33c: curved portion

Claims (11)

a rotating shaft rotatably supported by a front bearing and a rear bearing; a rotor supported by the rotating shaft and wound with a field coil in which a field core is impregnated with resin; A rotating electrical machine including a spacer portion disposed between a front bearing and formed integrally with the rotating shaft, wherein an end surface of the spacer portion on the field core side is in contact with the field core. and an end face of the spacer portion on the front bearing side is abutted against an end face of the inner ring of the front bearing, and the spacer portion has an end face of the spacer portion on the side of the field core to the front bearing side of the spacer portion. is formed longer than the distance between the field core and the inner ring of the front bearing, and the resin impregnated in the field coil flows from the end face of the spacer portion on the field core side A rotary electric machine, comprising: an extension suppressing portion that suppresses extension to the end face on the side of the front bearing. The extension suppressing portion is configured such that a path along which the resin impregnated in the field coil extends with respect to a horizontal plane of the spacer portion parallel to the central axis of the rotating shaft is between the field core and the inner ring of the front bearing. 2. The electric rotating machine according to claim 1 , wherein the distance is longer than the distance of . 3. The electric rotating machine according to claim 1, wherein the extension suppressing portion is configured to have a height difference with respect to a horizontal plane of the spacer portion that is horizontal to the central axis of the rotating shaft. 3. The extension suppressing portion is formed of a tapered portion that is inclined from a horizontal plane of the spacer portion toward a central axis side of the rotating shaft on the field core side. 4. The rotary electric machine according to any one of items 3. 3. The extension suppressing portion is formed such that the outer diameter of the spacer portion on the field core side is smaller than the outer diameter on the front bearing side. The rotary electric machine according to any one of . The extension suppressing portion is configured by providing at least one convex portion between a first outer diameter portion of the spacer portion on the field core side and a second outer diameter portion of the spacer portion on the front bearing side. The rotary electric machine according to any one of claims 1 to 3, characterized in that: The extension suppressing portion is configured by providing at least one concave portion between a first outer diameter portion of the spacer portion on the side of the field core and a second outer diameter portion of the spacer portion on the side of the front bearing. The rotary electric machine according to any one of claims 1 to 3, characterized in that: 3. The extension suppressing portion is composed of at least one tapered portion that is inclined and connected from the field core side of the spacer portion to the front bearing side of the spacer portion. The rotary electric machine according to any one of . The extension suppressing portion is formed such that the outer diameter of the first outer diameter portion of the spacer portion on the field core side is smaller than the outer diameter of the second outer diameter portion of the spacer portion on the front bearing side. , wherein at least one tapered portion is formed to connect the first outer diameter portion and the second outer diameter portion at an angle. Rotating electric machine described. The extension suppressing portion has a first end surface portion and a second end surface portion formed on an end surface of the spacer portion on the front bearing side, and the width dimension of the second end surface portion is larger than the width dimension of the first end surface portion. 3. The electric rotating machine according to claim 1, wherein the rotating electric machine is configured to have a width dimension. 3. The extension suppressing portion according to claim 1, wherein the extension suppressing portion is composed of at least one curved portion extending from the field core side of the spacer portion to the front bearing side of the spacer portion. rotating electric machine.

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