Electric motor

Abstract

The present invention provides an electric motor (1) having wiring components (20a, 20b), an annular inner housing (10) disposed on the inner peripheral side of a stator (11), and a wiring fixing component (2) formed around the wiring components (20a, 20b). Longitudinal holes (recesses) (10a, 10d) that open at one end face and extend in the axial direction are formed at the outer peripheral edge portion of the inner housing (10), and a step difference (locking portion) (12) is formed on the inner peripheral surface of the longitudinal holes. When the wiring components (20a, 20b) are respectively inserted into the longitudinal holes (10a, 10d), the wiring fixing component (2) is locked to the step difference.

Description

[0001] This divisional application of the invention application has an international filing date of June 28, 2018, an international application number of PCT / JP2018 / 024495, a national application number of 201880057241.6 when entering the Chinese national phase, and an invention title of "Motor". Technical Field

[0002] The present invention relates to a motor, and particularly to an improvement in the mounting structure of wirings such as leads connected to the coils of the motor.

[0003] This application claims priority based on Japanese Patent Application No. 2017-178756 filed on September 19, 2017, and incorporates its content herein. Background Art

[0004] Regarding motors, for example, the following structure has been proposed: As Figure 7 shown, a wiring fixing member 33 for fixing the wiring 32 is press-fitted and inserted into a recess 31 formed by cutting out the outer peripheral surface of a hollow annular inner shell 30, and the wiring fixing member 33 is fixed by a bolt 34 (see Patent Document 1).

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2007-244096 Summary of the Invention

[0008] Problems to be Solved by the Invention

[0009] Such prior art requires bolts or screw holes for fixing metal parts, a space for arranging components such as metal parts and bolts, and the number of components also increases.

[0010] An object of the solution of the present invention is to provide a motor with a smaller number of components and capable of improving the efficiency of installation operations such as wiring.

[0011] Solutions for Solving the Problems

[0012] The motor according to the solution of the present invention is characterized by having: a wiring component; an annular inner shell disposed on the inner peripheral side of the stator; and a wiring fixing component formed around the wiring component. A longitudinal hole that opens at one end face and extends in the axial direction is formed at the outer peripheral edge portion of the inner shell, a step difference is formed on the inner peripheral surface of the longitudinal hole, and when the wiring component is inserted into the longitudinal hole, the wiring fixing component is caught by the step difference to prevent the wiring component from coming out of the inner shell.

[0013] Another aspect of the motor of the present invention includes: a housing; a wiring component connected to an electrical component housed in the housing; and a wiring fixing component disposed on the outer surface of the wiring component. The housing has: a recess extending along the axial direction of the wiring component, having a wall surface surrounding a part of the wiring component and the wiring fixing component; and a stopper disposed on the wall surface to restrict the axial movement of the wiring fixing component.

[0014] Advantageous Effects of the Invention

[0015] According to the solution of the present invention, a motor with a smaller number of components and high installation operation efficiency such as wiring can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an axial sectional view of the motor according to an embodiment of the present invention.

[0017] Figure 2 is a perspective view of the main part of the motor, (a) showing the state before the wiring is housed on the resolver side of the inner housing, and (b) showing the state after the wiring is housed on the resolver side of the inner housing.

[0018] Figure 3 is Figure 2 a schematic partial enlarged view of the main part shown in, (a) and (b) showing the state before the wiring is housed on the resolver side of the inner housing, and (c) and (d) showing the state after the wiring is housed on the resolver side of the inner housing.

[0019] Figure 4 is a perspective view of the main part of the motor showing the state before the wiring is housed on the motor side of the inner housing.

[0020] Figure 5 is a perspective view of the main part of the motor showing the state after the wiring is housed on the motor side of the inner housing.

[0021] Figure 6 is Figure 5 a schematic partial enlarged view of the main part shown in, showing the wiring before housing with imaginary lines.

[0022] Figure 7 is a view showing the state when the wiring is fixed to the inner housing using a wiring fixing component in a motor of the prior art. DETAILED DESCRIPTION OF THE INVENTION

[0023] An embodiment of the motor of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiment, and design changes can be made within the scope of the present invention.

[0024] The motor 1 is a direct drive type, as Figure 1As shown, it has a housing 8. Inside the housing 8, the electric motor 1 includes: a motor (an example of an electrical component) 42; a bearing 43 for rotatably supporting the motor 42; and a resolver (a rotation detector, an example of an electrical component) 44 for detecting the rotation state of the motor 42. The housing 8 has an inner housing 10 and an outer housing 9. The electric motor 1 is a structure with an overall outline substantially in a circular ring shape. In other embodiments, the electric motor 1 can be applied to a non-direct drive type.

[0025] In addition, as shown in Figure 2 , the electric motor 1 includes a stator 11 formed in a circular ring shape. The inner housing 10 (a part of the housing 8) is arranged on the inner peripheral side of the stator 11 and is formed in a circular ring shape. In addition, in order to protect the coil (an example of an electrical component) 41 wound around the stator 11, the electric motor 1 has a motor cover 40 (refer to Figure 1 ) formed of a circular plate member at the upper part of the stator 11.

[0026] It should be noted that in Figure 2 , for the sake of easy understanding of the characteristic components of this application, the motor cover 40 and the coil 41 are omitted from the illustration. The same applies to Figure 4 and Figure 5 described later.

[0027] A plurality of mounting holes (screw holes) 10c are provided on the motor mounting surface (shaft end surface) 10b of the inner housing 10. On the other hand, bolt insertion holes are provided on a motor mounting base (not shown) for fixing the electric motor 1 in correspondence with the respective mounting holes 10c. The electric motor 1 is fixed to the motor mounting base by bolts using these mounting holes 10c and bolt insertion holes.

[0028] As shown in Figure 1 , recesses (hollows, cutouts, wiring accommodating portions, wiring accommodating spaces) 10a, 10d are provided on the outer peripheral surface of the inner housing 10. In one embodiment, the recesses 10a, 10d are provided at two positions symmetric with respect to the point on the outer peripheral surface of the inner housing 10. In other embodiments, the recesses (hollows) can be provided at other parts of the housing 8 instead of and / or additionally. In addition, the number of recesses is 1, 2, 3, 4 or 5 or more.

[0029] The recesses 10a, 10d are longitudinal holes cut out from the motor mounting surface 10b (as the upper end surface) of the inner housing 10 in the axial direction (toward the lower side of the paper surface), and their cross section (cross-sectional surface) has a U-shaped opening on the outer peripheral side.

[0030] The recess (first recess) 10a is used as a storage portion for a wiring member 20a (also called a resolver wire) connected to the resolver 44 for rotation position detection (refer to Figure 2)。The recess (second recess) 10d is used as a storage portion for the wiring component 20b (also referred to as a motor wire) connected to the coil 41 of the stator 11 for power supply. In other embodiments, another recess can be provided as a storage portion for the wiring component connected to another electrical component housed in the housing 8.

[0031] By storing the wiring components 20a and 20b in the recesses 10a and 10d in this way, the wiring components 20a and 20b do not protrude from the outer peripheral surface of the inner housing 10, eliminating the possibility of contacting the stator 11.

[0032] The following will sequentially describe the form of the inner housing on the resolver wire side, the wiring fixing component, and the form of the inner housing on the motor wire side in this embodiment.

[0033] [Inner housing on the resolver wire side]

[0034] The recess 10a is a longitudinal hole cut out axially from the upper end surface (motor mounting surface 10b) of the inner housing 10. The lower end portion of the recess 10a is connected to the through hole 13. The through hole 13 is a pipe formed axially (towards the upper side of the paper surface) from the lower end surface of the inner housing 10. The lead wire 14 can be inserted into the interior of the through hole 13 (refer to Figure 1 ).

[0035] It should be noted that the detailed shape of the recess 10a (depression, U-shaped hole) will be described together with the relationship between the wiring fixing component 2 (the portion to be engaged) and the recess 10a (the engaging portion) described later. Here, in particular, the parts different from the inner housing on the motor wire side will be described.

[0036] In the motor 1, the resolver 44 is provided on the lower side (the outer peripheral bottom surface of the inner housing 10) of the bearing 43. The lead wire (cable) 14 is inserted into a cylindrical through hole (pipe) 13 provided inside the inner housing 10, and the resolver 44 is electrically connected to an external sensor device via the lead wire 14.

[0037] The through hole (pipe) 13 has a diameter equal to or larger than the diameter of the bundle of the lead wire 14 so that the bundle of the lead wire 14 can be inserted. One end (starting end) of the through hole (pipe) 13 is connected to the lower end portion of the longitudinal hole (recess 10a), and penetrates through the inner housing 10 axially in the middle. The other end (ending end) of the through hole (pipe) 13 is formed on the lower end surface of the inner housing 10, and becomes an opening 16 through which the lead wire 14 can be pulled out from the through hole 13.

[0038] In this embodiment, the resolver 44 is positioned on the bottom surface side of the inner housing 10. In other embodiments, for example, in the case of positioning the resolver 44 on the upper surface side of the inner housing 10, it is not necessary to provide the through hole 13 over the entire range axially. For example, it can also be as Figure 2As shown in (b) thereof, a wiring method is adopted in which the lead wire 14 is introduced into a gap formed in the recess 10a (space 10h from the wiring fixing member 2 to the bottom surface of the recess 10a).

[0039] The lead wire 14 is configured such that, in order to protect it from the external environment, for the part that is pulled out to the external sensor device, a flexible tube such as polyvinyl chloride (PVC) is used to cover a part of the outer peripheral side of the plurality of lead wires 14. In other embodiments, the lead wire 14 can be applied in a form using a flexible tube of another material or a form different from the form using a flexible tube.

[0040] [Wiring member]

[0041] The wiring members 20a and 20b have a wiring fixing member 2 provided on the outer surface of the wiring members 20a and 20b. The wiring fixing member 2 is an annular member having a prescribed axial length and a radial thickness along the axial direction of the wiring members 20a and 20b. For example, the wiring fixing member 2 is bonded to the outer periphery of the tube 20 of the wiring members 20a and 20b and integrated with the tube 20. The outer diameter of the wiring fixing member 2 is larger than that of the wiring members 20a and 20b. The axial end (the portion to be engaged 21) of the wiring fixing member 2 is configured to protrude radially outward with respect to the outer peripheral surface of the wiring members 20a and 20b. In other embodiments, the wiring fixing member 2 may have a non-annular shape.

[0042] In the present embodiment, the recesses 10a and 10d are as Figure 2 shown in (a) and Figure 3 have an engaging portion 12. The engaging portion 12 is a step for setting the wiring members 20a and 20b on the inner peripheral surface (wall surface 18) of the recesses (U-shaped holes) 10a and 10d, and is formed in a U-shape when observed in a sectional view. The wiring fixing member 2 is hooked and fixed to the step of such recesses 10a and 10d. The recesses (depressions) 10a and 10d are provided to extend along the axial direction of the wiring members 20a and 20b (the axial direction of the housing 8). The recesses (depressions) 10a and 10d have a wall surface 18 that surrounds a part of the wiring members 20a and 20b and the wiring fixing member 2. On the wall surface 18, there is an engaging portion (stopping portion, step (level difference), anchoring portion, hook) 12 that restricts the movement of the wiring members 20a and 20b in the axial direction (the axial direction of the housing 8) of the wiring fixing member 2. The engaging portion (stopping portion) 12 protrudes with respect to the wall surface 18. In one example, the axial end (the portion to be engaged 21) of the wiring fixing member 2 is abutted and configured on the engaging portion (stopping portion) 12.

[0043] Specifically, when the wiring components 20a and 20b are pressed into the recesses (U-shaped holes) 10a and 10d, the region of the wiring fixing member 2 that protrudes in a flange shape in a direction orthogonal to the tube 20 functions as the engaged portion 21, and the wiring components 20a and 20b are engaged with the engaging portion 12 and fixed. Since the further movement of the tube 20 is blocked, the wiring components 20a and 20b can be prevented from coming off. The end portion (engaged portion 21) of the wiring fixing member 2 abuts against the engaging portion (stopping portion) 12, and the axial movement of the wiring components 20a and 20b and the wiring fixing member 2 is restricted. In the recess 10a, the distance between the end face (abutting face) of the engaging portion 12 and the bottom face 10h is the same as or greater than the axial length of the wiring fixing member 2.

[0044] In one example, the wiring fixing member 2 (engaged portion 21) is made of resin. In other examples, the wiring fixing member 2 may be made of a non-resin material such as metal.

[0045] In other embodiments, it can be configured such that a recess (engaging portion 12) is provided on the wall surface 18 of the housing 8, a convex portion (engaged portion 21) is provided on the wiring fixing member 2, and the recess (engaging portion 12) and the convex portion (engaged portion 21) are engaged with each other. Or it can be configured such that a convex portion (engaging portion 12) is provided on the wall surface 18 of the housing 8, a recess (engaged portion 21) is provided on the wiring fixing member 2, and the convex portion (engaging portion 12) and the recess (engaged portion 21) are engaged with each other. In one example, the engaged portion 21 can also be configured to be engaged with the engaging portion 12 by the engagement of unevenness (claw portions). For example, it can also be configured such that a convex portion that engages with a recess provided on the inner peripheral surface of the opening side of the recess (U-shaped hole) 10a is provided on the outer peripheral surface of the wiring fixing member 2 (engaged portion 21) (latch structure, locking structure, engaging structure using an elastomer). Conversely, it can also be configured such that a recess is provided on the outer peripheral surface of the wiring fixing member 2 (engaged portion 21), a convex portion is provided on the inner peripheral surface of the recess (U-shaped hole) 10a, and they are engaged by fitting (using a latch structure, locking structure, engaging structure of an elastomer).

[0046] In one example, as Figure 3 shown in (a) and (b), the recess (U-shaped hole) 10a includes a space portion having a length T2 in the axial direction of the inner housing 10. A step difference equal to the difference P ((S2 - S1) / 2) between the outer diameter S1 of the tube 20 and the outer diameter S2 of the engaged portion 21 is formed in the radially inner region of the wall surface 18 facing this space portion. This step difference portion is provided as the engaging portion 12. The recess 10a (space portion) has a first depth T1 along the radial direction and a second depth T3 smaller than the first depth T2.

[0047] The locking part 12 is arranged in the recess (U-shaped hole) 10a in such a way as to form a space capable of accommodating a part of the wiring fixing member 2. In one example, as shown in (a) and (b) of Figure 3 a first U-shaped hole 12a and a second U-shaped hole 12b are formed. The second U-shaped hole 12b has a curved surface arranged in a manner approaching the axis with respect to the curved surface of the first U-shaped hole 12a. For example, the curved surface of the second U-shaped hole 12b has a contour along the outer peripheral surface of the locked part 21. The difference P in depth between the first U-shaped hole 12a and the second U-shaped hole 12b is the step difference of the locking part 12. The degree of protrusion (difference P) of this step difference corresponds to the degree of protrusion of the flange of the wiring fixing member 2.

[0048] Next, the fixing method of the wiring fixing member 2 will be described using Figure 3 (a) to (d) of Figure 3 (a) and (b) of Figure 3 show the state before installation. Figure 3 (c) and (d) of

[0049] show the state after installation. In Figure 3 (c) and (d) of Figure 3 , the locked part 21 of the wiring fixing member 2 is hooked on the step difference of the difference P of the locking part 12, and the wiring fixing member 2 is installed on the inner shell 10. That is, the locked part 21 and the locking part 12 are fitted and fixed.

[0050] With this configuration, the wiring fixing member 2 is stably held with respect to the inner shell 10.

[0051] In addition, when the wiring fixing member 2 is fixed to the recess 10a, the tube 20 is not pressed, so there is no possibility of the tube 20 being damaged by forced force.

[0052] In one example, the outer diameter S2 of the engaged portion 21 is substantially the same as the width of the second U-shaped hole 12b (first U-shaped hole 12a) of the inner case 10. When the material of the engaged portion 21 (wiring fixing member 2) is made of resin, by strongly pressing the engaged portion 21, the engaged portion 21 elastically deforms along the second U-shaped hole 12b, and the engaged portion 21 is engaged with the engaging portion 12 in the second U-shaped hole 12b. In other examples, the material of the engaged portion 21 (wiring fixing member 2) can be a non-resin material. The outer diameter S2 of the engaged portion 21 can be set to be smaller than the width of the second U-shaped hole 12b (first U-shaped hole 12a) of the inner case 10. In this case, according to characteristics such as the flexibility of the wirings 20a, 20b, the relationship between the distance between the end face of the engaging portion 12 and the bottom face 10h in the recess 10a and the axial length of the wiring fixing member 2 is set to suppress the movement of the wiring fixing member 2.

[0053] If the engaged portion 21 and the engaging portion 12 are engaged and fixed, then even if the wiring fixing member 2 is pulled in a direction away from the inner case 10, that is, the wiring members 20a, 20b are pulled axially upward, the engaged portion 21 is hooked on the engaging portion 12. Therefore, the axial movement of the wiring fixing member 2 is blocked and the holding state of the wiring members 20a, 20b is maintained. Thereby, the wiring members 20a, 20b do not fall off in the wiring structure, and high reliability is achieved.

[0054] As Figure 3 shown, the wall surface 18 of the inner case 10 (outer case 8) has a first section SC1, a second section SC2, a third section SC3, and a fourth section SC4 in the circumferential direction around the axis of the tube (wiring members 20a, 20b) 20 (circumferential direction around the axis of the recess 10a). In the first section SC1, an engaging portion (stopping portion) 12 is provided on the wall surface 18. In the second section SC2, the recess (depression) 10a is open (a region without the wall surface 18). The third section SC3 and the fourth section SC4 are non-forming regions (regions without the engaging portion 12) of the engaging portion (stopping portion) 12, and are arranged between the first section SC1 and the second section SC2 in the circumferential direction. The first section SC1 is arranged on the inner side in the radial direction of the inner case 10, and the second section SC2 is arranged on the outer side in the radial direction. By means of the second section SC2 which is an open region, the installation operations of the wiring members 20a, 20b and the wiring fixing member 2 are smoothly performed for the outer case 8 (inner case 10). The wall surface 18 of the third section SC3 and the wall surface 18 of the fourth section SC4 are arranged opposite to each other. For example, the wall surface 18 of the third section SC3 and the wall surface 18 of the fourth section SC4 are arranged substantially parallel to each other. Alternatively, the wall surface 18 of the third section SC3 and the wall surface 18 of the fourth section SC4 are arranged such that the distance therebetween gradually changes along the radial direction. During installation or disassembly operations, the wiring members 20a, 20b and the wiring fixing member 2 are guided by the wall surfaces 18 of the third and fourth sections SC3, SC4 and the operations are smoothly performed.

[0055] Here, a direct drive motor (hereinafter referred to as an electric motor) uses a drive method (a drive method of a motor load direct connection type) in which a transmission mechanism such as a gear, a conveyor belt, and a roller is not interposed and a rotational force is directly transmitted to a rotating body so that the rotating body rotates in a specified direction with respect to a body to be rotated, and is used for a workpiece rotation holding part of a working device, a drive joint part of a robot arm, and the like.

[0056] As such an electric motor, in order to make the outer shape of the device directly driving a load as small as possible and increase the motor output (motor output) as much as possible within a limited volume, it is required to reduce as much as possible the outer shell and the lead-out part of the wiring that do not directly contribute to the motor output.

[0057] The electric motor 1 according to the present embodiment does not have a structure in which bolt insertion holes are provided and wiring fixing parts are fixed using bolts and metal parts like an electric motor of the prior art. Therefore, the number of parts such as bolts and metal parts can be reduced, and it can be realized at low cost. In addition, the space for arranging parts such as bolts and metal parts can be saved, so that the whole product can be made compact. Further, since the number of parts is small, the efficiency of the installation work of the wiring fixing parts and the like can be improved. In addition, since the structure of fixing the wiring fixing parts using bolts and metal parts is not adopted like an electric motor of the prior art, there is no risk that the metal parts become loose or parts such as the metal parts and bolts fall into the motor rotating part when a force for pulling the wiring is applied.

[0058] [Inner shell on the motor wire side]

[0059] Next, the shape of the inner shell on the motor wire side will be described in accordance with Figure 4 and Figure 5 Explain the shape of the inner shell on the motor wire side.

[0060] In Figure 4 and Figure 5 the recess has a cutout hole having an overall inverted T shape formed by a recess 10d and a recess 10e. The recess 10d is a longitudinal hole cut out along the axial direction from one end face (motor mounting surface 10b) of the inner shell 10, and the recess 10e is a transverse hole that communicates with the recess 10d of the longitudinal hole and is cut out along the outer peripheral surface of the inner shell 10.

[0061] The relationship between the recess 10d of the longitudinal hole and the wiring fixing part 2 is the same as the relationship between the recess 10a (locking part) on the resolver wire side of the inner shell 10 and the wiring fixing part 2 described above, so the description here is simplified. The following description will be focused on the parts that are particularly different from the shape on the resolver wire side of the inner shell 10.

[0062] The motor 42 of the electric motor 1 is located on the upper side in the axial direction with respect to the bearing 43 outside the inner shell 10, and thus a through hole 13 (for routing the resolver wire) is not formed as on the resolver wire side.

[0063] As described above, the inner housing 10 on the motor side is formed with a recess 10d located at a point-symmetrical position with respect to the recess 10a and a recess 10e formed by cutting a part of the outer peripheral surface along the circumferential direction, as shown in Figure 4 and Figure 5 . The longitudinal hole recess 10d extending axially to the middle of the outer peripheral surface communicates with the transverse hole recess 10e which is a cutout in an arc shape (viewed in section from the side), and the whole is formed in a T shape.

[0064] The transverse hole recess 10e is cut out within an angular range of α with respect to the axis of the motor 42, as shown in Figure 6 . The range of this angle α is appropriately set according to the motor product, installation conditions, etc.

[0065] In addition, the recess 10e forms a space region (in the horizontal direction) surrounded by an arc 10f and a chord 10g cut from the outer peripheral surface at the position of the cutout depth Q1. The inner diameter at this time is Q2. In the present embodiment, the depth Q1 is at the same depth as the depth T1 in the axial direction (longitudinal direction in the figure) of the inner housing 10 shown in Figure 3 (a).

[0066] In the longitudinal hole recess 10d, a locking portion 12 (step difference) is formed to protrude in a manner having a predetermined width in the radial direction, similarly to the recess 10a (on the resolver wire side). In addition, the structure of the wiring fixing member 2 press-fitted into the recess 10d is the same.

[0067] That is, the wiring 20b is locked to the locking portion 12 in a state where the lower surface of the locking portion 12 abuts against the upper surface of the wiring fixing member 2 (locked portion 21).

[0068] In the present embodiment, the lead wire 15 is accommodated in the recess 10e, divided into left and right parts along the chord 10g of the arc shape, and respectively connected to the coil 41 of the motor 42.

[0069] It should be noted that the routing of the lead wire 15 is based on the motor product and installation conditions, so it is not limited to being divided into left and right two directions. For example, it may also be a way of dividing the lead wire 15 into one direction or more than two directions. In addition, it may also be a way of routing in multiple directions within the angular range α of the cutout of the recess 10e.

[0070] As shown above, by providing recesses 10d and 10e in the inner shell 10 as storage portions for the wiring components 20b, the lead wires 15 can be routed in a manner adapted to the positional structure of the stator of the motor 1. In addition, since the lead wires 15 can be held without protruding from the outer diameter of the inner shell 10, the motor 1 can be constructed more compactly. Further, since there is no need for metal parts or the like for fixing the wiring as in the prior art, the efficiency of the wiring installation operation can be improved.

[0071] Description of Reference Numerals

[0072] 1 Motor (Direct Drive Motor)

[0073] 2 Wiring Fixing Component

[0074] 10 Inner Shell

[0075] 10a, 10d Recess (Longitudinal Hole)

[0076] 11 Stator

[0077] 12 Locking Portion (Step Difference)

[0078] 13 Through-Hole

[0079] 14, 15 Lead Wire

[0080] 16 Opening

[0081] 20 Tube

[0082] 20a, 20b Wiring Component

[0083] 21 Locked Portion

[0084] 40 Motor Cover

[0085] 41 Coil

[0086] 42 Motor

[0087] 43 Bearing

[0088] 44 Resolver

Claims

1. A motor, characterized in that, comprising: a stator wound with a coil; a housing having an outer shell and an inner shell, wherein the inner shell has an annular shape, is disposed on the inner circumferential side of the stator and extends in the axial direction; a wiring component having a lead and a tube for protecting the lead, and connected to an electrical component housed in the housing; and a wiring fixing component provided on the outer surface of the tube of the wiring component, the inner shell has a recess that extends along the axial direction and is provided on one end surface of the inner shell, the recess has: a bottom surface in the axial direction; a wall surface surrounding a part of the wiring component and the wiring fixing component; and a stopper portion provided so as to protrude with respect to the wall surface, the wall surface opens an interval in the radially outer direction between the one end surface of the inner shell and the bottom surface of the recess, the wiring fixing component has a first axial end surface and a second axial end surface located on the opposite side of the first axial end surface, the first axial end surface is disposed facing the stopper portion so as to abut against the stopper portion, a transverse hole that is cut out along the circumferential direction and extends in a direction intersecting the axial direction is formed on the side surface of the inner shell, the recess communicates with the transverse hole, the wiring component is separated at a portion where the recess communicates with the transverse hole, a part of the wiring component extends and is disposed in a first part of the transverse hole, another part of the wiring component extends and is disposed in a second part of the transverse hole different from the first part, the stopper portion restricts the movement of the wiring fixing component relative to the inner shell toward the outer side in the axial direction.

2. The electric motor according to claim 1, wherein the wiring fixing component is elastically deformed and pressed into the recess.

3. The electric motor according to claim 1, wherein the wiring fixing component is located between the one end surface of the inner shell and the electrical component in the axial direction.

4. The electric motor according to claim 2, wherein the wiring fixing component is located between the one end surface of the inner shell and the electrical component in the axial direction.

5. The electric motor according to any one of claims 1 to 4, wherein the wall surface has a first section where the stopper portion is locally provided and a second section where the recess is open in a prescribed circumferential direction.

6. The electric motor according to claim 5, wherein the wall surface has a third section and a fourth section, the third section and the fourth section are disposed between the first section and the second section in the prescribed circumferential direction and are non-forming regions of the stopper portion, the wall surface of the third section and the wall surface of the fourth section are disposed opposite to each other.

7. The electric motor according to any one of claims 1 to 4, wherein an axial gap is provided between the second axial end surface of the wiring fixing component and the bottom surface of the recess.

8. The electric motor according to any one of claims 1 to 4, wherein the wiring fixing component is made of resin and is fitted into the recess.

9. The electric motor according to claim 7, wherein The wiring fixing member is made of resin and fits into the recess.

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