Rotary electric machine holding device

Abstract

To provide a rotary electric machine holding device in which an installation space of a rotary electric machine can be increased and cost increase can be suppressed.SOLUTION: In a holding device 1 for a rotary electric machine 2, the rotary electric machine 2 is elastically held in a case 31 in which the rotary electric machine 2 is housed. The holding device includes: a radial direction holding tool 11 having a tubular part 111 that is a tubular body disposed between the rotary electric machine 2 and the case 31 and covering a bearing part 211b of the rotary electric machine 2 from the outer circumference, and a plurality of first spring parts 112 that are disposed on the outer circumferential surface of the tubular part 111 and that elastically hold the rotary electric machine 2 from the radial directions; and a thrust direction holding tool 12 having a second spring part 121 that is disposed between an axial end surface of the rotary electric machine 2 and the case 31 and around the radial direction holding tool 11 and that elastically holds the rotary electric machine 2 from the axial direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a holding device for a rotating electrical machine. [Background technology]

[0002] A rotating electric machine mounted on a vehicle may be housed in a case that covers the outer periphery of the rotating electric machine. In this case, it is preferable that the rotating electric machine be elastically supported within the case to protect the rotating electric machine from vibrations of the engine, etc.

[0003] Patent Document 1 discloses an actuator holding device that includes a rotating electric machine (actuator), a case (housing) that houses and holds the rotating electric machine, and one plate-shaped elastic member (anti-vibration spring) interposed in the gap between the rotating electric machine and the case. This one plate-shaped elastic member (anti-vibration spring) has a radial direction holding portion that elastically holds a side portion of the rotating electric machine in the radial direction, and a thrust direction holding portion that elastically holds an end face portion of the rotating electric machine in the axial direction, and the radial direction holding portion and the thrust direction holding portion are integrally formed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-180342 A Summary of the Invention [Problem to be solved by the invention]

[0005] The plate-shaped elastic member (vibration-proof spring) of Patent Document 1 elastically holds a rotating electric machine inside a case from both its radial direction and thrust direction, and is suitable for motors and the like mounted in the engine room of a vehicle that require high vibration resistance. However, the plate-shaped elastic member has a structure in which a plurality (three) of first elastic holding pieces of the radial holding part elastically hold the rotating electric machine from the outer periphery of the side part of the rotating electric machine. In other words, because the first elastic holding pieces elastically hold the rotating electric machine from its outer periphery, a space is required between the rotating electric machine and the case to accommodate the first elastic holding pieces, which expands the diameter of the case and makes it difficult to compact the mounting space for the rotating electric machine.

[0006] Furthermore, the process of molding the plate-shaped elastic member (anti-vibration spring) includes a process of punching out the shape of the plate-shaped elastic member (anti-vibration spring) from a metal plate. The shape of the plate-shaped elastic member to be punched out is such that a number of first elastic retaining pieces protrude radially from a substantially circular member formed by a substantially annular motor fitting retaining portion and a thrust direction retaining portion located on the outer periphery of the member, and therefore the material (metal plate) is likely to be wasted. In other words, the shape of the plate-shaped elastic member tends to increase the amount of material that is wasted, and since ingenuity is required in the cutting of the material, costs are likely to increase.

[0007] An object of the present invention is to provide a holding device for a rotating electric machine, which can suppress an increase in the mounting space for the rotating electric machine and an increase in costs. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the present invention provides a rotating electric machine holding device that elastically holds a rotating electric machine within a case in which the rotating electric machine is housed, comprising: a radial direction holding device having a cylindrical portion which is a cylindrical body that is provided between the rotating electric machine and the case and covers the bearing portion of the rotating electric machine from the outer periphery, and a plurality of first spring portions that are provided on the outer periphery of the cylindrical portion and elastically hold the rotating electric machine from its radial direction; and a thrust direction holding device that is provided between the axial end face of the rotating electric machine and the case and around the radial direction holding device, and has second spring portions that elastically hold the rotating electric machine from its axial direction. Effect of the Invention

[0009] According to the present invention, since both the radial direction retainer and the thrust direction retainer can be stored within the diameter of the rotating electric machine, it is possible to suppress an increase in the mounting space for the rotating electric machine and an increase in costs. Problems, configurations and effects other than those described above will become apparent from the description of the embodiments below. [Brief description of the drawings]

[0010] [Figure 1] 1 is an exploded perspective view of a holding device for a rotating electric machine according to a first embodiment of the present invention and a rotating electric machine held by the holding device; [Diagram 2] 1 is a cross-sectional view taken along the XY plane of a rotating electric machine to which a retaining device for a rotating electric machine according to a first embodiment of the present invention is attached. [Diagram 3] 1 is a partial cross-sectional view taken along the XY plane of an in-vehicle actuator in which a rotating electric machine is held by a holding device for a rotating electric machine according to a first embodiment of the present invention. [Figure 4] 1 is a perspective view of a radial holder according to a first embodiment of the present invention; [Diagram 5] 1 is an exploded perspective view of a radial holder according to a first embodiment of the present invention; FIG. [Figure 6] 1 is a perspective view of a thrust direction holding fixture according to a first embodiment of the present invention; [Figure 7] 10 is a cross-sectional view taken along the XY plane of a holding device for a rotating electric machine according to a second embodiment of the present invention, a motor case, and a rotating electric machine held within the motor case by the holding device. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The configuration and operation of the holding device for a rotating electric machine according to the first and second embodiments of the present invention will be described below with reference to the drawings. In each drawing, the same reference numerals indicate the same parts. In addition, the perspective views and cross-sectional views each specify the direction according to mutually orthogonal XYZ axes, with +X being "right", -X being "left", +Y being "up", -Y being "down", +Z being "front", and -Z being "rear".

[0012] In this article, "axial direction," "circumferential direction," and "radial direction" are defined as follows. Namely, "axial direction" is the direction along the rotation axis AX of the rotating electric machine. "Circumferential direction" is the direction along the rotation direction (or the opposite rotation direction) of the rotating electric machine, i.e., the circumferential direction centered on the rotation axis AX. "Radial direction" is the direction perpendicular to the rotation axis AX, i.e., the radial direction of a circle centered on the rotation axis AX. Also, "inner circumference side" refers to the inside (inner diameter side) in the radial direction, and "outer circumference side" refers to the opposite direction, i.e., the outside (outer diameter side) in the radial direction.

[0013] (First embodiment) Fig. 1 is an exploded perspective view of a holding device for a rotating electric machine according to a first embodiment of the present invention (hereinafter, the holding device) and a rotating electric machine held by the holding device. Fig. 2 is a cross-sectional view of the rotating electric machine, taken along the XY plane, to which the holding device according to the first embodiment of the present invention is attached.

[0014] First, the rotating electric machine 2 held by the holding device 1 according to this embodiment will be described in detail.

[0015] The rotating electric machine 2 is, for example, a DC motor with brushes, and includes a stator 21 which is a fixed part, an armature 22 which is a rotor, a bearing 23 which supports the armature 22, a brush holder 24 which supplies power to the armature 22, a bracket 25 which connects the brush holder 24 and the stator 21, and a motor gear 26 which rotates together with the armature 22 and transmits power to the actuator. Note that other rotating electric machines, for example, a brushless motor, may also be used.

[0016] The stator 21 includes a yoke 211 which is a cylinder having a bottom plate 211a, a plurality of segment-type magnets 212 (two in this embodiment), and a magnet stay 213 which fixes the plurality of magnets 212 to the inner circumferential surface of the yoke 211.

[0017] The yoke 211 is made of, for example, iron, and covers the multiple magnets 212 while forming a circuit for the magnetism generated by the magnets 212 .

[0018] A bearing portion (bearing box) 211b that houses the bearing 23 is provided on a bottom plate 211a of the yoke 211. A radial direction holder 11 and a thrust direction holder 12, which will be described later, are attached to the outer circumferential surface of the bearing box 211b.

[0019] The armature 22 is inserted into the stator 21 and has an air gap between itself and a plurality of magnets 212 (including magnet stays 213 ), and is supported by bearings 23 .

[0020] The armature 22 includes a shaft 221 that forms a rotation axis AX, an armature core 222 that is an iron core fixed to the shaft 221, a plurality of armature coils 223 that are wound around skewed slits formed in the armature core 222 and have surfaces covered with, for example, varnish, and a commutator 224 that has a plurality of commutator segments 224a electrically connected to the plurality of armature coils 223.

[0021] The bearings 23 (231, 232) are, for example, ball bearings fitted into both ends of the shaft 221. One of the bearings, 231, is fitted and fixed in a bearing box 211b provided on a bottom plate 211a of the yoke 211. The other bearing, 232, is fitted and fixed in a bearing box 252 provided on a bracket 25, which will be described later.

[0022] The brush holder 24 includes an external power supply terminal 241 electrically connected to an external power supply not shown, a brush 242 electrically connected to the external power supply terminal 241 and transmitting electricity supplied to the external power supply terminal 241 to the commutator 224 of the armature 22, a brush spring 243 pressing the brush 242 against the commutator 224, and a brush holder base 244 formed of an insulating material (e.g., resin) so as to cover the opening of the yoke 211 and hold the brush 242 and the brush spring 243.

[0023] Bracket 25 is, for example, an iron plate, and has bolt holes 251 for inserting bolts for fixing rotating electric machine 2 to motor case 31 described later, a bearing box 252, a plurality (two in this embodiment) of first through holes 253 for allowing external power supply terminal 241 of brush holder 24 to protrude to the outside (-X side) of rotating electric machine 2, a plurality (two in this embodiment) of second through holes 254 for engaging hook 244a provided on brush holder base 244 with the outside (-X side) of rotating electric machine 2, and a plurality (four in this embodiment) of third through holes 255 for inserting engaging protrusion 211c provided on yoke 211.

[0024] The bracket 25 and the brush holder 24 are detachably connected by engaging a hook 244 a provided on the brush holder base 244 with the second through hole 254 .

[0025] In addition, the bracket 25 and the stator 21 are detachably coupled by inserting multiple (four in this embodiment) engaging protrusions 211c provided on the cylindrical end of the yoke 211 into the four third through holes 255 and spreading each of the two protrusions at the tip of the engaging protrusions 211c in different circumferential directions.

[0026] The motor gear 26 is attached to the shaft 221 protruding from a fourth through hole 252a provided in the bearing box 252 of the bracket 25, and is fixed to the shaft 221, for example, by tightening a set screw into a screw hole provided in the motor gear 26 and pressing the tip of the set screw against the shaft 221.

[0027] The holding device 1 is, for example, a device for holding a bearing box (bearing portion) 211b provided on a bottom plate 211a of a yoke 211 of a rotating electric machine 2 in which a bracket 25 is fixed by a bolt to a motor case 31 of an actuator 3, and includes a radial direction holding fixture 11 that holds the bearing in the radial direction, and a thrust direction holding fixture 12 that holds the bearing in the thrust direction. In addition, the radial direction holding fixture 11 and the thrust direction holding fixture 12 are preferably separate bodies.

[0028] 3 is a partial cross-sectional view along the XY plane of an actuator 3 in which a rotating electric machine 2 is held by a holding device 1 for a rotating electric machine 2 according to the first embodiment of the present invention. The actuator 3 is, for example, an actuator that adjusts the amount of air flowing into an engine, and is provided with a motor case 31 that houses the rotating electric machine 2.

[0029] The motor case 31 has a first recess 311 that accommodates the stator 21 and brush holder 24 of the rotating motor 2, a second recess 312 formed on a bottom surface 311a of the first recess 311 that accommodates a bearing box 211b having a radial retainer 11 attached thereto, and a screw hole formed in a tip surface 313 of the motor case 31.

[0030] By fastening a bolt inserted into a bolt hole 251 of the bracket 25 to a screw hole of the motor case 31, the motor gear 26 side (-X side) of the rotating electric machine 2 is fixed.

[0031] On the other hand, the second recess 312 side (+X side) of the rotating electric machine 2 is held by the holding device 1. This makes it possible to prevent the unfixed second recess 312 side (+X side) of the rotating electric machine 2 from vibrating due to vibration transmitted from the motor case 31 to the rotating electric machine 2. Note that the motor case 31 is preferably made of, for example, aluminum in order to dissipate heat generated in the rotating electric machine 2.

[0032] Fig. 4 is a perspective view of the radial direction holding tool 11 according to this embodiment. Fig. 5 is an exploded perspective view of the radial direction holding tool 11 according to this embodiment.

[0033] The radial retainer 11 is made of, for example, steel, and includes a cylindrical portion 111 that covers the outer periphery of the bearing box 211b, and a plurality of (six in this embodiment) first spring portions (tabs) 112 that are provided on the outer periphery of the cylindrical portion 111 and elastically retain the rotating motor 2 from the radial direction.

[0034] The tubular portion 111 in this embodiment is formed by a plurality of (six in this embodiment) first flat plate portions 111a, a plurality of (three in this embodiment) second flat plate portions 111b, a plurality of (two in this embodiment) third flat plate portions 111c, and one slit portion 111d.

[0035] The multiple first flat plate portions 111a are the part having the widest surface in the tubular portion 111, and between two adjacent first flat plate portions 111a, there are provided either multiple second flat plate portions 111b, multiple third flat plate portions 111c, or one slit portion 111d.

[0036] The surfaces of the multiple first flat plate portions 111a facing the bearing box 211b come into contact with the outer periphery of the bearing box 211b, thereby causing the radial direction holder 11 to hold the bearing box 211b. In this way, the radial direction holder 11 is fixed to the bearing box 211b. The radial direction holder 11 may also be fixed to the bearing box 211b by, for example, welding the first flat plate portions 111a to the bearing box 211b.

[0037] Each of the first flat plate portions 111a is provided with a first spring portion 112, which will be described later. It is preferable that a slide portion 113 protrudes from an end portion of each of the first flat plate portions 111a on the bearing box 211b side, and a stopper portion 114 protrudes from an end portion of each of the first flat plate portions 111a on the second recess 312 side of the motor case 31.

[0038] It is preferable that the second plate portions 111b and the third plate portions 111c are alternately provided between two adjacent first plate portions 111a in the first plate portions 111a. It is preferable that the second plate portions 111b and the third plate portions 111c are provided with bridges 111e that connect with the strip material during press working. This allows the radial direction holder 11 to be progressively press worked without being separated from the strip material supplied to the die.

[0039] Moreover, it is preferable that the width W2 of the multiple second flat plate portions 111b in the axial direction of the rotating electric machine 2 is substantially the same as the width W1 of the first flat plate portion 111a in the axial direction of the rotating electric machine 2. This can enhance strength. On the other hand, it is preferable that the width W3 of the multiple third flat plate portions 111c in the axial direction of the rotating electric machine 2 is narrower than the width W1 of the first flat plate portion 111a in the axial direction of the rotating electric machine 2. This can reduce weight and facilitate bending.

[0040] One slit portion 111d is a gap that separates the tubular portion 111 in the circumferential direction, and divides, for example, a third flat plate portion 111c provided between two adjacent first flat plate portions 111a in the multiple first flat plate portions 111a in the separation thrust direction.

[0041] It is preferable that the radial direction holder 11 is provided with slits 111d in the cylindrical portion 111, and becomes a plate member as shown in Fig. 5 when the cylindrical portion is expanded in the circumferential direction. In other words, the radial direction holder 11 can be formed by bending a plate member. Therefore, the radial direction holder 11 can be cut from a strip-shaped material.

[0042] Also, the radial direction holder 11 may have protrusions 111f, 111g protruding from opposite ends of the third flat plate portion 111c divided by forming one slit portion 111d. This prevents the third flat plate portion 111c divided by forming one slit portion 111d from shifting in one direction in the axial direction (X direction) of the cylindrical portion 111. Two protrusions 111g may be provided to sandwich the protrusion 111f to prevent the cylindrical portion 111 from shifting in both directions in the axial direction (X direction). Two protrusions 111f may be provided to sandwich the protrusion 111g.

[0043] Moreover, the multiple (six in this embodiment) tabs 112 are preferably leaf springs provided at predetermined intervals along the circumferential direction of the cylindrical portion 111 on the outer circumferential surface of the cylindrical portion 111. Specifically, the multiple tabs 112 are preferably formed by cutting and raising a portion of the first flat plate portion 111a so as to push it outward in the radial direction. This makes it possible to provide multiple tabs 112 with high strength and elasticity at low cost.

[0044] The multiple tabs 112 come into contact with the inner periphery of the second recess 312 of the motor case 31, thereby holding the bearing box 211b of the rotating electric machine 2 in the radial direction via the multiple first flat plate portions 111a coming into contact with the outer periphery of the bearing box 211b. Note that, although six tabs 112 are provided in this embodiment, the present invention is not limited to this number, and three or more tabs may be provided.

[0045] In addition, the multiple (six in this embodiment) slide portions 113 are plate-shaped members that protrude obliquely radially outward toward the rotating electric machine 2 from the ends (-X side) of the multiple first flat plate portions 111a on the rotating electric machine 2 side.

[0046] Since the multiple slide portions 113 protrude obliquely radially outward from the multiple first flat plate portions 111a, the radial direction holder 11 can be easily attached to the bearing box 211b. Moreover, the radial direction holder 11 can be positioned by abutting the multiple slide portions 113 against the bottom plate 211a of the yoke 211. Moreover, since the multiple slide portions 113 elastically contact the bottom plate 211a of the yoke 211 obliquely, impact in the thrust direction can also be mitigated.

[0047] The multiple (six in this embodiment) stopper portions 114 are plates that protrude radially inward from the ends of the multiple first flat plate portions 111a on the bottom side (+X side) of the motor case 31, and have a gap between them and the bottom plate of the bearing box 211b as shown in Fig. 3. Therefore, even if the multiple stopper portions 114 collide with the bottom surface of the second recess 312 of the motor case 31, the impact is prevented from being directly transmitted to the bearing box 211b.

[0048] FIG. 6 is a perspective view of the thrust direction holder 12 according to this embodiment.

[0049] The thrust direction retainer 12 is provided between the axial end face of the rotating electric machine 2 on the motor case 31 side and the motor case 31, around the radial direction retainer 11, and has a second spring portion 12a that elastically retains the rotating electric machine 2 in the axial direction.

[0050] The second spring portion 12a is an annular steel plate whose outer diameter is smaller than the outer diameter of the bottom plate 211a of the yoke 211 and whose inner diameter is larger than the outer diameter of the radial direction retainer 11, and is processed by corrugating or cutting it out so as to generate elastic force. For example, a wave washer made by bending a flat washer made of spring steel into multiple wave shapes may be used.

[0051] The second spring portion 12a is sandwiched between the bottom plate 211a of the yoke 211 and the bottom surface 311a of the first recess 311 of the motor case 31 and bends, thereby generating an elastic force.

[0052] Moreover, the thrust direction holder 12 is preferably provided with a plurality of (three in this embodiment) inward protrusions 12b that protrude from the second spring portion 12a toward the radial inside of the thrust direction holder 12, have tips that bend obliquely toward the motor case 31 side (+X side), and abut against the side surface of the bearing box 211b. The thrust direction holder 12 is fixed to the bearing box 211b by fitting the plurality of inward protrusions 12b into the bearing box 211b, and radial movement is restricted.

[0053] Alternatively, instead of providing the multiple inner protrusions 12b on the thrust direction holder 12, multiple outer protrusions may be provided that protrude from the second spring portion 12a toward the radially outer side of the thrust direction holder 12, with their tips bent obliquely toward the bottom plate 211a side (-X side) of the yoke 211, and abut against the inner circumferential surface of the first recess 311 of the motor case 31. The thrust direction holder 12 is fixed to the motor case 31 by abutting the multiple outer protrusions against the inner periphery of the first recess 311 of the motor case 31, and radial movement is restricted. [effect] The holding device 1 of this embodiment is a holding device 1 for a rotating electric machine 2 that elastically holds the rotating electric machine 2 in a motor case 31 in which the rotating electric machine 2 is housed, and includes a cylindrical portion 111 that is a cylindrical body that is provided between the rotating electric machine 2 and the motor case 31 and covers the outer periphery of a bearing box 211b of the rotating electric machine 2, a radial direction holder 11 having a plurality of tabs 112 that are provided on the outer periphery of the cylindrical portion 111 and elastically hold the rotating electric machine from its radial direction, and a thrust direction holder 12 that is provided between the axial end face of the rotating electric machine 2 and the motor case 31 and around the radial direction holder 11 and has a second spring portion 121 that elastically holds the rotating electric machine 2 from its axial direction. As a result, both the radial direction holder 11 and the thrust direction holder 12 can be stored within the diameter of the rotating electric machine 2, so that an expansion of the mounting space for the rotating electric machine 2 and an increase in costs can be suppressed.

[0054] In addition, it is preferable that the radial direction holder and the thrust direction holder of the retaining device 1 according to this embodiment are formed separately. This makes it possible to suppress an increase in material costs because the punched development view is smaller and the material usage is improved compared to a retaining device in which the radial direction holder 11 and the thrust direction holder 12 are integrally formed.

[0055] Moreover, the radial direction holder according to this embodiment is preferably provided with a slit (slit portion 111d) that separates the cylindrical portion 111 in the circumferential direction of the cylindrical portion and extends in the axial direction, and becomes a plate member when the cylindrical portion 111 is expanded in the circumferential direction. As a result, the radial direction holder 11 can be manufactured by bending a plate member, so that the yield is good in material cutting (for example, material cutting in progressive press working), and the waste portion can be reduced compared to a holding device in which a radial direction holder is provided on the outer periphery side of a thrust direction holder, thereby reducing costs.

[0056] Second embodiment 7 is a cross-sectional view along the XY plane of a retaining device 201 according to a second embodiment of the present invention, a motor case 31, and a rotating electric machine 2 retained in the motor case 31 by the retaining device 201. The retaining device 201 according to this embodiment differs from the retaining device 1 according to the first embodiment in that it includes only a radial direction retainer 11 and does not include a thrust direction retainer 12. Therefore, the retaining device 201 according to this embodiment is a retaining device that is particularly effective when only radial vibrations are applied to the rotating electric machine 2. Even when small vibrations are applied in the thrust direction, the retaining device 201 can absorb the vibrations in the thrust direction by the multiple slide portions 113 (see FIG. 4).

[0057] [effect] Since the holding device 201 of this embodiment includes only the radial direction holder 11, the cost can be reduced.

[0058] The present invention is not limited to the above-described embodiment, and includes various modified examples. For example, the above-described embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to those including all of the configurations described. In addition, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. In addition, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

[0059] The embodiment of the present invention may be modified as follows: For example, when only vibration in the thrust direction of the rotating electric machine 2 is applied, the retaining device may include only the thrust direction retainer 12. [Explanation of symbols]

[0060] 1,201...holding device, 2...rotating electric machine, 3...actuator, 11...radial direction holding tool, 12...thrust direction holding tool, 12a...second spring part, 31...motor case, 111...cylindrical part, 111d...slit part, 112...first spring part (tab), 121...second spring part, 211...yoke, 211a...bottom plate, 211b...bearing part (bearing box),

Claims

1. A rotating electric machine holding device that elastically holds a rotating electric machine in a case in which the rotating electric machine is housed, comprising: a radial direction holder including a cylindrical portion provided between the rotating electric machine and the case and covering an outer periphery of a bearing portion of the rotating electric machine, and a plurality of first spring portions provided on an outer periphery of the cylindrical portion and elastically holding the rotating electric machine in a radial direction; a thrust direction holder provided between an axial end face of the rotating electric machine and the case and around the radial direction holder, the thrust direction holder having a second spring portion that elastically holds the rotating electric machine in the axial direction; A holding device for a rotating electric machine comprising:

2. 2. The rotating electrical machine holding device according to claim 1, 4. A holding device for a rotating electric machine, wherein the radial direction holding fixture and the thrust direction holding fixture are formed as separate bodies.

3. 2. The rotating electrical machine holding device according to claim 1, The retaining device for a rotating electric machine, wherein the radial direction retaining tool becomes a plate member when unfolded.

4. 2. The rotating electrical machine holding device according to claim 1, A retaining device for a rotating electric machine, wherein the first spring portion is a leaf spring provided at a predetermined interval on an outer circumferential surface of the cylindrical portion along a circumferential direction of the cylindrical portion.

5. 2. The rotating electrical machine holding device according to claim 1, A retaining device for a rotating electric machine, wherein the second spring portion is a leaf spring provided in an annular shape around the radial retainer and having a diameter smaller than an axial end face of the rotating electric machine.

6. 3. The rotating electrical machine holding device according to claim 2, A holding device for a rotating electric machine, comprising only the radial direction holding tool.

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