JP6395751B2 - Rotating electric machine and electric power steering apparatus - Google Patents

Description

  The present invention relates to a rotating electrical machine in which a rotor is rotatably provided inside a stator, and an electric power steering device.

  Conventionally, in order to suppress vibration of the stator core, a rotating electrical machine in which a rotor shaft is rotatably held by a holding member via a bearing and an outer peripheral portion of the holding member is fitted to an inner peripheral portion of the stator core It is known (see, for example, Patent Document 1).

JP 2007-244084 A

  However, in the conventional rotating electric machine shown in Patent Document 1, the inner peripheral portion of the stator core and the outer peripheral portion of the holding member are caused by a dimensional tolerance between the inner peripheral portion of the stator core and the outer peripheral portion of the holding member. In some cases, a gap may be formed between the two. In this case, the state in which the stator core is held by the holding member becomes uneven in the circumferential direction of the stator core, and vibration and noise of the stator core cannot be effectively suppressed.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain a rotating electric machine and an electric power steering device that can more reliably suppress vibration and noise of a stator core. To do.

  A rotating electric machine and an electric power steering apparatus according to the present invention are provided with a stator having a cylindrical stator core and armature windings provided on the stator core, and are rotatably provided inside the stator. A rotor, a support member that is disposed outside the stator in the axial direction, and rotatably supports the rotor, and a connection member that is provided between the support member and the stator iron core. A main body provided on the member, and a plurality of contact portions protruding from the end of the common main body on the stator core side and spaced apart from each other in the circumferential direction of the stator core Each contact portion is in contact with the axial end surface of the stator core.

  A rotating electric machine and an electric power steering device according to the present invention are provided with a stator having a cylindrical stator core and armature windings provided on the stator core, and are rotatably provided inside the stator. Arranged on the outer side in the axial direction of the stator, the support member rotatably supporting the rotor, and provided between the support member and the stator core, and spaced from each other in the circumferential direction of the stator core Each connection member has a main body portion provided on the support member, and a contact portion protruding from the end of the main body portion on the stator core side, Each contact portion is in contact with the axial end surface of the stator core.

  According to the rotating electrical machine and the electric power steering apparatus according to the present invention, the dimensional tolerance in the axial direction of the stator core can be individually absorbed for each contact portion, and each contact portion is more reliably brought into contact with the stator core. Can be made. Accordingly, the rigidity of the stator core can be increased by the connecting member, and the deviation of the rigidity of the stator core in the circumferential direction can be more reliably reduced. Therefore, vibration and noise of the stator core can be more reliably suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the electric power steering apparatus by Embodiment 1 of this invention. It is sectional drawing which shows the electric drive device of FIG. It is a front view which shows the stator of FIG. It is a perspective view which shows the flame | frame of FIG. 2, a stator, and a connection member. It is an expansion perspective view which shows the principal part of the connection member attached to the stator of FIG. It is a perspective view which shows the connection member of FIG. It is an enlarged view which shows the coil part of FIG. It is a block diagram which shows a state when inserting the contact part of the connection member of FIG. 5 in the clearance gap between teeth and an insulator. It is a perspective view which shows the principal part of the stator core of the motor which is a rotary electric machine by Embodiment 2 of this invention. FIG. 10 is an exploded perspective view illustrating a state in which the tooth coupling body of FIG. 9 is detached from the core back. It is sectional drawing which shows a state when attaching the insulator in which the coil part was provided to each teeth of the teeth coupling body of FIG. It is a perspective view which shows the flame | frame of the motor which is a rotary electric machine by Embodiment 3 of this invention, a stator, and a connection member. It is a perspective view which shows the connection member of FIG. It is sectional drawing which shows the motor which is a rotary electric machine by Embodiment 4 of this invention. It is a perspective view which shows the flame | frame of FIG. 14, a stator, and a connection member. It is a perspective view which shows the connection member of FIG. It is sectional drawing which shows the motor which is a rotary electric machine by Embodiment 5 of this invention. It is a block diagram which shows the state by which the insertion part of each connection member of FIG. 17 is individually inserted in each through-hole of a 1st flange. FIG. 19 is a perspective view showing a state where the first flange of FIG. 18 is detached from the frame. It is sectional drawing which shows the motor which is a rotary electric machine by Embodiment 6 of this invention. It is a perspective view which shows the connection member of the motor by Embodiment 7 of this invention. It is an expanded sectional view which shows the contact part of the connection member of FIG. It is a perspective view which shows the connection member of the motor by Embodiment 8 of this invention. It is a perspective view which shows the connection member of the motor by Embodiment 9 of this invention. It is an expanded sectional view which shows the contact part of the connection member of FIG. It is a perspective view which shows the connection member of the motor by Embodiment 10 of this invention. It is a perspective view which shows the connection member of the motor by Embodiment 11 of this invention. It is an expanded sectional view which shows the contact part of the connection member of FIG. It is a perspective view which shows the connection member of the motor by Embodiment 12 of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an electric power steering apparatus according to Embodiment 1 of the present invention. The electric power steering apparatus according to the present embodiment is an electric power steering apparatus for a vehicle mounted on a vehicle such as an automobile. A rack shaft (not shown) accommodated in the housing 2 is connected between the pair of tie rods 1. Each connecting portion of each tie rod 1 and the rack shaft is housed in a rack boot 3 that prevents foreign matter from entering the electric power steering apparatus. A shaft 4 is connected to the rack shaft. When a driver steers a steering wheel (not shown), torque due to steering is transmitted to the rack shaft via a steering shaft (not shown) and the shaft 4. The shaft 4 is provided with a torque sensor 5 that detects torque caused by steering of the steering wheel. In addition, an electric drive device 7 is provided on the rack shaft via a gear box 6. The electric power steering device includes an electric drive device 7.

  The electric drive device 7 includes a motor 8 that is a rotating electrical machine, and an ECU (Electric Control Unit) 9 that is a control unit attached to the motor 8. That is, the electric drive device 7 is an integrated electric drive device in which the ECU 9 is integrated with the motor 8. In this example, the motor 8 and the ECU 9 are arranged so as to overlap in a direction along the axis of the rack shaft. Note that the motor 8 and the ECU 9 may be arranged in the radial direction of the rack shaft, or the motor 8 and the ECU 9 may be arranged separately from each other.

  The ECU 9 is provided with a first connector 10, a second connector 11, and a power connector 12. Information on the torque detected by the torque sensor 5 is sent as an electrical signal from the torque sensor 5 to the ECU 9 via the first connector 10. Vehicle information that is information such as the vehicle speed of the automobile is sent as an electrical signal from a vehicle sensor (for example, a speed sensor) installed in the vehicle to the ECU 9 via the second connector 11. A power source (for example, a battery or an alternator) that supplies power to the ECU 9 is connected to the power connector 12. The ECU 9 calculates a necessary assist torque based on the torque information from the torque sensor 5 and the vehicle information from the vehicle sensor, and supplies a current corresponding to the assist torque to the motor 8.

  The motor 8 generates torque by power supply from the ECU 9. The gear box 6 incorporates a belt and a ball screw (both not shown). The torque generated by the motor 8 is decelerated via the gear box 6 and moves the rack shaft in the direction of arrow A in FIG. Thereby, the steering force of the driver is assisted by the torque of the motor 8.

  When the rack shaft moves in the direction of arrow A, the pair of tie rods 1 moves, the tires steer and the vehicle turns. As a result of assisting the steering force by the torque of the motor 8, the driver can turn the vehicle with a small steering force.

  FIG. 2 is a cross-sectional view showing the electric drive device 7 of FIG. The ECU 9 includes an aluminum heat sink 21 attached to the motor 8, an inverter circuit 22 for driving the motor 8, a control board 23 for controlling the inverter circuit 22, an inverter circuit 22, And a case 24 that covers the control board 23.

  The inverter circuit 22 has a plurality of switching elements 25. Each switching element 25 is attached to the heat sink 21 via an adhesive and an insulating sheet. Although not shown in FIG. 2, the inverter circuit 22 includes, in addition to the switching element 25, a smoothing capacitor, a noise removal coil, a power relay, a bus bar that electrically connects them, and the like. .

  Based on the information received from the first connector 10 and the second connector 11, the control board 23 sends a control signal for individually controlling the operation of each switching element 25 to the inverter circuit 22. The inverter circuit 22 controls the current supplied from the inverter circuit 22 to the motor 8 by individually controlling the operation of each switching element 25 based on a control signal from the control board 23.

  The case 24 is fixed to the heat sink 21 so as to cover the inverter circuit 22 and the control board 23. The case 24 may be made of a resin, may be made of a metal such as aluminum, or the case 24 may be formed by combining a resin and a metal such as aluminum.

  The motor 8 includes a cylindrical frame 31, a cylindrical stator 32 that is an armature fixed in the frame 31, a rotor 33 that is rotatably provided inside the stator 32, and a rotation A pair of shafts 34 penetrating the rotor 33 and integrated with the rotor 33, and fixed to the both ends in the axial direction of the frame 31 by a plurality of bolts 40, and rotatably supporting the rotor 33 and the shaft 34. The first flange 35 and the second flange 36, which are the supporting members, and a connection member 37 provided between the first flange 35 and the stator 32. The motor 8 is arranged with the first flange 35 facing the ECU 9. A heat sink 21 of the ECU 9 is attached to the first flange 35.

  The first flange 35 and the second flange 36 are disposed outside the stator 32 and the rotor 33 in the axial direction. As a result, the stator 32 and the rotor 33 are disposed between the first flange 35 and the second flange 36. Further, the first flange 35 and the second flange 36 are arranged at positions away from the stator 32 and the rotor 33 in the axial direction. Further, each of the first flange 35 and the second flange 36 is provided with a through hole through which the shaft 34 is passed. A bearing 38 is fitted in each through hole of the first flange 35 and the second flange 36. The shaft 34 is rotatably supported by the first flange 35 and the second flange 36 via respective bearings 38.

  The shaft 34 has a first end 34a and a second end 34b. The first end 34 a of the shaft 34 is passed through the through hole of the first flange 35, and the second end 34 b of the shaft 34 is passed through the through hole of the second flange 36.

  The stator 32 is fixed to the inner peripheral surface of the frame 31 coaxially with the axis of the shaft 34. In this example, the stator 32 is fixed to the inner peripheral surface of the frame 31 by shrink fitting. Thereby, the stator 32 is accommodated in a housing constituted by the frame 31, the first flange 35 and the second flange 36. The stator 32 has a cylindrical stator core 41 fixed to the inner peripheral surface of the frame 31 and an armature winding 42 provided on the stator core 41. The stator core 41 is a laminated body in which a plurality of core sheets (for example, electromagnetic steel plates) that are magnetic bodies are laminated in the axial direction of the stator 32.

  The rotor 33 is disposed coaxially with the axis of the shaft 34 with a gap with respect to the inner peripheral surface of the stator core 41. The rotor 33 includes a rotor core 43 fixed to the shaft 34 and a plurality of permanent magnets 44 provided on the rotor core 43. The rotor 33 is fixed to the shaft 34 by press-fitting the shaft 34 into the rotor core 43. Thereby, the rotor 33 rotates integrally with the shaft 34. The plurality of permanent magnets 44 are arranged at intervals in the circumferential direction of the rotor core 43. In this example, 14 permanent magnets 44 are embedded in the rotor core 43 at equal intervals in the circumferential direction.

  The connection member 37 is disposed along the inner peripheral surface of the stator core 41. Further, the connection member 37 is disposed between the first flange 35 and the stator core 41 in a state in which the connection member 37 is pressed against the axial end surface of the stator core 41 by the first flange 35. Thereby, the first flange 35 and the stator core 41 are connected to each other via the connection member 37. The rigidity of the stator core 41 is higher than that without the connection member 37 because the first flange 35 and the stator core 41 are connected via the connection member 37.

  A pulley 45 is fixed to the second end portion 34 b of the shaft 34, that is, the end portion of the shaft 34 opposite to the ECU 9 side. A belt of the gear box 6 in FIG. 1 is hung on the pulley 45. Thereby, the torque of the motor 8 is transmitted to the rack shaft through the gear box 6.

  A sensor magnet 46 that is a permanent magnet is provided at the first end 34 a of the shaft 34, that is, the end of the shaft 34 on the ECU 9 side. A sensor device 47 that detects the magnetic field of the sensor magnet 46 is supported on the heat sink 21.

  The sensor device 47 includes a rotation sensor 48 that is a magnetic sensor facing the sensor magnet 46 in the axial direction of the shaft 34, and a sensor substrate 49 on which the rotation sensor 48 is mounted. The sensor board 49 is connected to the control board 23 via signal lines and power supply lines (not shown).

  When the shaft 34 and the rotor 33 rotate, the rotation sensor 48 detects the magnetic field generated by the sensor magnet 46 and detects the direction of the magnetic field. The sensor device 47 detects the rotation angle of the rotor 33 by detecting the magnetic field and direction of the sensor magnet 46. Information on the rotation angle of the rotor 33 detected by the sensor device 47 is sent from the sensor board 49 to the control board 23. When receiving information from the sensor device 47, the control board 23 sends a control signal corresponding to the rotation angle of the rotor 33 to the inverter circuit 22. Thereby, the ECU 9 supplies a drive current corresponding to the rotation angle detected by the sensor device 47 to the motor 8 through a power supply line (not shown).

  FIG. 3 is a front view showing the stator 32 of FIG. The stator core 41 protrudes radially inward from the core back 51 along the inner peripheral surface of the frame 31, and is arranged at intervals from each other in the circumferential direction of the stator core 41. A plurality of teeth 52. In this example, 18 teeth 52 are arranged at equal intervals in the circumferential direction of the stator core 41. As a result, the stator core 41 is provided with 18 slots 53 formed between the teeth 52. A certain gap exists between the radially inner end face of each tooth 52 and the outer peripheral face of the rotor 33.

  The armature winding 42 has a plurality of coil portions 54 provided individually on the teeth 52 via insulators 55. In this example, each coil portion 54 is individually provided on each tooth 52 by concentrated winding. Thereby, the two coil portions 54 adjacent to each other are accommodated in the common slot 53. In this example, the armature winding 42 has 18 coil portions 54. The insulation state between each coil part 54 and the stator core 41 is ensured by each insulator 55.

  FIG. 4 is a perspective view showing the frame 31, the stator 32, and the connection member 37 of FIG. FIG. 5 is an enlarged perspective view showing a main part of the connection member 37 attached to the stator 32 of FIG. FIG. 6 is a perspective view showing the connection member 37 of FIG. In FIG. 6, the connection member 37 is shown in a state where it is detached from the stator 32. The connection member 37 includes a cylindrical main body 61 and a plurality of contact portions 62 that respectively protrude from the end of the main body 61 on the stator core 41 side.

  The main body 61 is provided on the first flange 35 in a state where the end of the main body 61 on the first flange 35 side is in contact with the first flange 35. The inner diameter of the main body 61 is larger than the inner diameter of the stator core 41.

  Each contact portion 62 is an elastically deformable plate-like portion that protrudes from the common main body portion 61. Further, the contact portions 62 are arranged at intervals from each other in the circumferential direction of the stator core 41. In this example, the number of contact portions 62 is the same as the number of teeth 52, and each contact portion 62 is arranged at equal intervals in the circumferential direction of the stator core 41 according to the circumferential position of each tooth 52. ing. Thereby, in this example, each contact part 62 is contacting the axial direction end surface of each teeth 52 separately.

  Further, each contact portion 62 protrudes from the main body portion 61 in a direction spreading outward in the radial direction of the main body portion 61 while protruding from the main body portion 61 outward in the axial direction of the main body portion 61. Each contact portion 62 is elastically deformed in a state of being individually pressed against the axial end surface of the radially inner end portion of each tooth 52 (that is, the inner peripheral portion of the stator core 41). Thereby, each contact part 62 has generate | occur | produced the elastic restoring force in the direction which contacts the teeth 52. FIG. The connection member 37 is held between the stator core 41 and the first flange 35 in a state where the connection member 37 is stretched by the elastic restoring force of each contact portion 62.

  There is a gap between the end face in the axial direction of the tooth 52 and the insulator 55. Each contact portion 62 is disposed in a gap between the tooth 52 and the insulator 55. Thereby, each contact part 62 is contacting the axial direction end surface of the stator iron core 41, respectively in the state hold | maintained at each teeth 52 separately.

  As shown in FIG. 6, each connecting portion 63 of each contact portion 62 with respect to the main body portion 61 is a bent portion that is bent in a direction in which the distal end portion of the contact portion 62 is directed radially outward of the main body portion 61. . Further, the connecting part 63 is elastically deformable so that the contact part 62 is displaced in the radial direction of the stator core 41 with respect to the main body part 61. When each contact portion 62 receives a force inward in the radial direction of the connection member 37, the distal end portion of the contact portion 62 is displaced inward in the radial direction by elastic deformation of the connecting portion 63. Thereby, the contact part 62 can be inserted into the gap between the teeth 52 and the insulator 55 from the radially inner side of the stator core 41.

  In a state where the connection member 37 is held between the stator core 41 and the first flange 35, each contact portion 62 is individually pressed against each tooth 52 by elastic deformation of each contact portion 62. In a state where each contact portion 62 is pressed against each tooth 52, each contact portion 62 becomes nearly parallel to the axial end surface of the stator core 41 due to elastic deformation of each contact portion 62. It is in a state close to 90 degrees. When the connecting member 37 is removed from between the stator core 41 and the first flange 35, the elastic deformation of each contact portion 62 is eliminated and the angle of each contact portion 62 with respect to the main body portion 61 is obtuse as shown in FIG. become.

  FIG. 7 is an enlarged view showing the coil portion 54 of FIG. The end surface on the radially inner side of each tooth 52 is located closer to the inner circumferential side near the outer circumferential surface of the rotor 33 than the end surface on the radially inner side of the insulator 55. In addition, the radially inner end face of the insulator 55 is located closer to the inner peripheral side closer to the outer peripheral face of the rotor 33 than the radially inner end face of the coil portion 54.

  The thickness in the radial direction of the main body 61 is smaller than the distance X from the radially inner end surface of the tooth 52 to the radially inner end surface of the insulator 55. In addition, the end surfaces on the radially inner side and the radially outer side of the main body portion 61 (that is, the inner peripheral surface and the outer peripheral surface of the cylindrical main body portion 61) are teeth when viewed along the axial direction of the stator 32. 52 is disposed between the radially inner end face of 52 and the radially inner end face of the insulator 55. As a result, the main body 61 is disposed at the radially inner end of the tooth 52 without protruding from the radially inner end face of the tooth 52 to the inner peripheral side while avoiding interference with the insulator 55 and the coil portion 54. Has been.

  The material constituting the connection member 37 is preferably a non-magnetic material (for example, stainless steel) that maintains rigidity when it is thin, is easily bent by elastic deformation, and hardly generates leakage magnetic flux of the stator core 41. . The material constituting the connecting member 37 may be a resin. If the material constituting the connection member 37 is made of resin, the rigidity of the connection member 37 is maintained, and the connection member 37 is easily elastically deformed, and an increase in the weight of the connection member 37 is suppressed. The material of the connection member 37 is not limited to the nonmagnetic material and the resin, and any material can be used as the material of the connection member 37 as long as the leakage magnetic flux of the stator core 41 hardly occurs and the rigidity is maintained and elastic deformation is possible.

  Next, a method for manufacturing the motor 8 will be described. First, the stator 32 is fixed to the inner peripheral surface of the frame 31. Thereafter, the rotor 33 to which the shaft 34 is fixed is disposed inside the stator 32, and the second flange 36 to which the shaft 34 is attached via the bearing 38 is fixed to one end portion of the frame 31.

  Thereafter, on the other end portion side of the frame 31, each contact portion 62 is inserted into a gap between the tooth 52 and the insulator 55, and the connection member 37 is attached to the axial end surface of the stator core 41.

  FIG. 8 is a configuration diagram illustrating a state when the contact portion 62 of the connection member 37 in FIG. 5 is inserted into the gap between the tooth 52 and the insulator 55. When the contact portion 62 is inserted into the gap between the tooth 52 and the insulator 55, the connecting portion 63 of each contact portion 62 is elastically deformed to displace the contact portion 62 to the radially inner side of the insulator 55. After the contact portion 62 is inserted into the gap between the insulator 55 and the insulator 55 from the radially inner side of the insulator 55, the elastic deformation of the connecting portion 63 is restored. Thereby, each contact portion 62 is inserted into the gap between the tooth 52 and the insulator 55.

  Thereafter, the first flange 35 is fixed to the other end of the frame 31 as shown in FIG. 2 while passing the shaft 34 through the through hole of the first flange 35. At this time, each contact portion 62 is elastically deformed by pressing the main body portion 61 of the connection member 37 with the first flange 35 in a state where each contact portion 62 is in contact with each tooth 52. In this state, the first flange 35 is fixed to the frame 31 with bolts 40. In this way, the motor 8 is manufactured.

  In such a motor 8 and a power steering apparatus, the connection members 37 provided between the stator core 41 and the first flange 35 are arranged at intervals in the circumferential direction of the stator core 41. Since each contact portion 62 is in contact with the axial end surface of the stator core 41, the dimensional tolerance in the axial direction of the stator core 41 is individually determined for each contact portion 62. Therefore, the contact portions 62 can be brought into contact with the stator core 41 more reliably. Accordingly, the rigidity of the stator core 41 can be increased by the connection member 37, and the deviation of the rigidity of the stator core 41 in the circumferential direction can be more reliably reduced. Therefore, the natural frequency of the stator core 41 becomes high, and the resonance of the stator core 41 can be made difficult to occur, and the vibration and noise of the stator core 41 can be more reliably suppressed. Further, since the stator core 41 is difficult to deform, the generation of cogging torque due to the deformation of the stator core 41 can be more reliably suppressed. Furthermore, by using a material having a higher thermal conductivity than air as the material of the connection member 37, heat can be easily conducted from the stator core 41 to the first flange 35, and the heat dissipation of the stator 32. Can be improved.

  Moreover, since each contact part 62 is contacting the axial direction end surface of each tooth | gear 52 separately, all the rigidity of each tooth | gear 52 can be improved more reliably, and the vibration and noise of the stator core 41 are further increased. It can be surely suppressed. Further, the occurrence of cogging torque due to the deformation of the stator core 41 can be further reliably suppressed.

  Moreover, since each contact part 62 is inserted in the clearance gap between the teeth 52 and the insulator 55, the contact part 62 can be hold | maintained between the teeth 52 and the insulator 55, and the contact part 62 becomes the teeth 52. Can be prevented from coming off.

  Further, each connecting portion 63 of each contact portion 62 with respect to the main body portion 61 can be elastically deformed so that the contact portion 62 is displaced inward in the radial direction of the stator core 41, so that the stator 32 is completed. After that, the contact portion 62 can be inserted into the gap between the tooth 52 and the insulator 55 from the radially inner side of the insulator 55. Thereby, manufacture of the motor 8 can be made easy.

  In addition, the end surfaces on the radially inner side and the radially outer side of the main body portion 61 of the connection member 37, when viewed along the axial direction of the stator 32, are the radially inner end surfaces of the teeth 52 and the diameter of the insulator 55. Since it is located between the end face on the inner side in the direction, it is possible to prevent the connection member 37 from interfering with each of the rotor 33, the coil part 54, and the insulator 55 while securing the installation space for the coil part 54 and the insulator 55. Can do.

  Moreover, since each contact part 62 has generate | occur | produced the elastic restoring force in the direction which contacts the teeth 52, each contact part 62 can be made to contact the stator core 41 still more reliably.

Embodiment 2. FIG.
FIG. 9 is a perspective view showing a main part of a stator core of a motor which is a rotating electrical machine according to Embodiment 2 of the present invention. Each tooth 52 is a separate member that can be attached to and detached from the core back 51. Further, the radially inner ends of the two adjacent teeth 52 are connected via a connecting portion 71 between the teeth. Thereby, the tooth | gear connected body which the edge parts inside radial direction of each tooth | gear 52 were connected in the cylinder shape via the connection part 71 between teeth is comprised.

  FIG. 10 is an exploded perspective view showing a state where the tooth coupling body of FIG. 9 is detached from the core back 51. Spaces between the teeth 52 are open on the radially outer side of the teeth connected body, and spaces between the teeth 52 are closed by the connecting portions 71 between the teeth on the radially inner side of the tooth connected body. The teeth coupling body is fixed to the core back 51 in a state where the radially outer ends of the teeth 52 are attached to the inner peripheral surface of the core back 51. Other configurations are the same as those in the first embodiment.

  Next, a method for manufacturing the stator 32 will be described. FIG. 11 is a cross-sectional view showing a state when an insulator 55 provided with a coil portion 54 is attached to each tooth 52 of the tooth coupling body of FIG. 10. When the stator 32 is manufactured, first, the insulator 55 provided with the coil portion 54 is individually attached to each tooth 52 of the tooth coupling body from the radially outer side of the tooth coupling body.

  When attaching the insulator 55 provided with the coil portion 54 to each tooth 52 of the tooth coupling body, the insulator 55 is connected to the tooth coupling body in a state in which each contact portion 62 of the connecting member 37 is in contact with the end surface in the axial direction of each tooth 52. It fits in each tooth | gear 52 from the radial direction outer side. At this time, the contact portion 62 is inserted into the gap between the insulator 55 and the tooth 52 while sliding the insulator 55 with respect to the tooth 52. As a result, the contact portion 62 is held between the tooth 52 and the insulator 55.

  Thereafter, the tooth coupling body to which the coil portion 54 and the insulator 55 are attached is fixed to the inner peripheral surface of the core back 51. At this time, the tooth connection body is press-fitted into the core back 51 while moving the tooth connection body in the axial direction of the core back 51. As a result, the radially outer end of each tooth 52 is fixed to the inner peripheral surface of the core back 51. In this way, the stator 32 is manufactured. Other procedures are the same as those in the first embodiment.

  Thus, since the core back 51 and each tooth | gear 52 were made into the separate member, after attaching the insulator 55 and the coil part 54 to each tooth | gear 52, each tooth | gear 52 can be fixed to the core back 51. FIG. Thereby, the trouble of the operation | work which attaches the connection member 37, the insulator 55, and the coil part 54 to each tooth | gear 52 can be reduced, and the manufacture operation | work of the stator 32 and the attachment operation | work of the connection member 37 with respect to the stator core 41 are easy. Can be.

  In the above example, the radially inner ends of the teeth 52 are connected to each other in a cylindrical shape via the inter-teeth connecting portion 71, but the teeth 52 are not connected to each other and are independent members. It may be.

  In the above example, since the contact portion 62 does not need to be elastically deformed when the contact portion 62 is inserted into the gap between the tooth 52 and the insulator 55, the connecting portion 63 of each contact portion 62 with respect to the main body portion 61. However, it does not have to be an elastically deformable bent portion.

Embodiment 3 FIG.
FIG. 12 is a perspective view showing a frame 31, a stator 32, and a connecting member 37 of a motor that is a rotating electrical machine according to Embodiment 3 of the present invention. Between the stator core 41 and the first flange 35, a plurality of connection members 37 that are separated from each other and independent are provided. The connection members 37 are arranged at intervals in the circumferential direction of the stator core 41. In this example, the number of connection members 37 is the same as the number of teeth 52, and the connection members 37 are arranged at equal intervals in the circumferential direction of the stator core 41 according to the circumferential position of each tooth 52. . Each connection member 37 includes a plate-like main body portion 61 and a plate-like contact portion 62 protruding from the end portion of the main body portion 61 on the stator core 41 side.

  Each main body 61 of each connection member 37 is arranged upright with respect to the axial end surface of the stator core 41. Each main body 61 is provided on the first flange 35 in a state where the end of the main body 61 on the first flange 35 side is in contact with the first flange 35. Each contact portion 62 is individually pressed against the axial end surface of the radially inner end portion of each tooth 52 (that is, the inner peripheral portion of the stator core 41). The main body 61 is elastically deformed by a compressive force between the stator core 41 and the first flange 35. Each connection member 37 is individually held between the stator core 41 and the first flange 35 in a state of being stretched by the elastic restoring force of the main body 61.

  Here, FIG. 13 is a perspective view showing the connection member 37 of FIG. Note that FIG. 13 shows the connection member 37 when it is removed from the stator 32. In this example, the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is a bent portion in which a fold is formed. In a state where each connecting member 37 is removed from the stator 32, the contact portion 62 is orthogonal to the main body portion 61, and the radial direction of the stator core 41 along the axial end surface of the stator core 41. Projecting from the main body 61 to the outside.

  Each contact part 62 is arrange | positioned in the clearance gap between the teeth 52 and the insulator 55, as shown in FIG. Accordingly, each connection member 37 is individually held by each tooth 52 of the stator core 41.

  The thickness in the radial direction of the main body 61 is smaller than the distance X from the radially inner end surface of the tooth 52 to the radially inner end surface of the insulator 55. Further, the end surfaces on the radially inner side and the radially outer side of the plate-like main body portion 61 are viewed along the axial direction of the stator 32, and the radially inner end surface of the teeth 52 and the radially inner side of the insulator 55. It is arrange | positioned between the end surfaces of. Thereby, each main body part 61 of each connection member 37 avoids interference with the insulator 55 and the coil part 54, and does not protrude from the radially inner end face of the tooth 52 to the inner peripheral side, and the diameter of the tooth 52. It is arranged at the inner end in the direction. Other configurations are the same as those in the first embodiment.

  When each connecting member 37 is attached to the stator 32 at the time of manufacturing the motor 8, each contact portion 62 of each connecting member 37 is individually inserted into the gap between the tooth 52 and the insulator 55. Thereafter, the first flange 35 is fixed to the other end portion of the frame 31 while passing the shaft 34 through the through hole of the first flange 35. At this time, each main body 61 is elastically deformed by pressing each main body 61 with the first flange 35 in a state where each contact 62 is in contact with each tooth 52, and each main body 61 is elastically deformed. Then, the first flange 35 is fixed to the frame 31 with the bolt 40. Other procedures are the same as those in the first embodiment.

  In such a motor 8 and an electric power steering device, a plurality of connection members 37 are arranged at intervals in the circumferential direction of the stator core 41, and each connection member 37 protrudes from the main body portion 61 and the main body portion 61. Since the contact portion 62 is in contact with the axial end surface of the stator core 41, the rigidity of the stator core 41 can be increased by the connecting members 37 and the stator core. The deviation of the rigidity 41 in the circumferential direction can be reduced more reliably. Thereby, the vibration and noise of the stator core 41 can be more reliably suppressed. Further, the generation of cogging torque due to the deformation of the stator core 41 can be more reliably suppressed. Furthermore, since each connection member 37 can be handled individually, each connection member 37 can be easily attached to the stator 32 individually, and the manufacture of the motor 8 can be facilitated. In particular, it is possible to facilitate the insertion of each contact portion 62 into the gap between the tooth 52 and the insulator 55.

  Moreover, since the connection part 63 of the contact part 62 with respect to the main-body part 61 is a bending part in which the crease | fold was formed, the structure of each connection member 37 can be made into a simple structure which only bends a board, Manufacturing of each connection member 37 can be facilitated.

  In the above example, each connection member 37 is individually held between the stator core 41 and the first flange 35 by the elastic restoring force of the main body 61, but the contact portion 62 is elastically deformed. Thus, each connection member 37 may be individually held between the stator core 41 and the first flange 35 by the elastic restoring force of the contact portion 62, or the main body portion 61 and the contact portion 62 may be Each of the connecting members 37 is individually held between the stator core 41 and the first flange 35 by the elastic restoring force of the main body portion 61 and the contact portion 62 so as to be elastically deformed. Also good. When the contact portion 62 is elastically deformed, the contact portion 62 is provided on the main body portion 61 so as to be inclined at an obtuse angle with respect to the main body portion 61 in a state where each connection member 37 is removed from the stator 32.

Embodiment 4 FIG.
FIG. 14 is a cross-sectional view showing a motor that is a rotating electrical machine according to Embodiment 4 of the present invention. 15 is a perspective view showing the frame 31, the stator 32, and the connection member 37 of FIG. The connection members 37 are arranged at intervals in the circumferential direction of the stator core 41. Each connection member 37 includes a plate-like main body portion 61, a plate-like contact portion 62 protruding from the end portion of the main body portion 61 on the stator core 41 side, and the first flange 35 side of the main body portion 61. And a plate-like receiving portion 75 protruding from the end portion.

  Each main body 61 of each connection member 37 is arranged upright with respect to the axial end surface of the stator core 41. Each main body 61 is provided on the first flange 35 in a state where the receiving portion 75 is in contact with the surface of the first flange 35 on the stator core 41 side. Each receiving portion 75 is individually pressed against the first flange 35 in an elastically deformed state. Thereby, each receiving portion 75 generates an elastic restoring force in a direction in contact with the first flange 35. Each connection member 37 is individually held between the stator core 41 and the first flange 35 in a state in which the connection member 37 is stretched by the elastic restoring force of the main body 61 and the receiving portion 75.

  Here, FIG. 16 is a perspective view showing the connection member 37 of FIG. In FIG. 16, the connecting member 37 is shown when it is removed from the stator 32. In each connecting member 37, the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 and the connecting portion 64 of the receiving portion 75 with respect to the main body portion 61 are bent portions in which folds are formed. Further, the contact portion 62 and the receiving portion 75 are bent in the same direction with respect to the main body portion 61. Further, the contact portion 62 protrudes from the main body portion 61 in a direction along the axial end surface of the stator core 41, and the receiving portion 75 protrudes from the main body portion 61 along the surface of the first flange 35 on the stator core 41 side. ing. In a state where each connection member 37 is removed from the stator 32, the contact portion 62 is orthogonal to the main body portion 61, and the angle formed by the main body portion 61 and the receiving portion 75 is an obtuse angle. Other configurations are the same as those of the third embodiment.

  When the connection members 37 are attached to the stator 32 during the manufacture of the motor 8, the respective contact portions 62 of the connection members 37 are individually inserted into the gaps between the teeth 52 and the insulator 55 as in the third embodiment. To do. Thereafter, the first flange 35 is fixed to the other end portion of the frame 31 while passing the shaft 34 through the through hole of the first flange 35. At this time, the main body portion 61 and the receiving portion 75 are elastically deformed by pressing the receiving portions 75 with the first flange 35 in a state where the respective contact portions 62 are in contact with the respective teeth 52, and the main body portion 61 and the receiving portion 75 are thereby deformed. The first flange 35 is fixed to the frame 31 with bolts 40 in a state in which is elastically deformed. Other procedures are the same as those in the third embodiment.

  In such a motor 8 and the electric power steering device, since the receiving portion 75 protrudes from the end portion of the main body portion 61 on the first flange 35 side, the connecting member 37 is connected to the stator core 41 by the first flange 35. When pressing, the first flange 35 can be received by the receiving portion 75. Thereby, the connection member 37 can be more reliably held between the stator core 41 and the first flange 35.

  In addition, since each receiving portion 75 generates an elastic restoring force in a direction in contact with the first flange 35, each receiving portion 75 absorbs the tolerance in the axial direction between the stator core 41 and the frame 31. Thus, each contact portion 62 can be further brought into contact with the axial end surface of the stator core 41 more reliably. Thereby, the vibration and noise of the stator 32 can be suppressed more reliably. Further, by adjusting the elastic restoring force of each receiving portion 75, the natural frequency of the stator 32 can be adjusted, and the vibration and noise of the stator 32 can be further reliably suppressed.

  In the above example, each connection member 37 is individually held between the stator core 41 and the first flange 35 by the elastic restoring force of the main body 61 and the receiving portion 75. 61, at least one of the contact portion 62 and the receiving portion 75 is elastically deformed, and each connection member 37 is fixed to the stator core 41 by the elastic restoring force of at least one of the main body portion 61, the contact portion 62 and the receiving portion 75. And the first flange 35 may be held separately. When the contact portion 62 is elastically deformed, the contact portion 62 is provided in the main body portion 61 so as to be inclined at an obtuse angle with respect to the outer surface of the main body portion 61 in a state where each connection member 37 is removed from the stator 32. When only the main body portion 61 is elastically deformed, the contact portion 62 and the receiving portion 75 are parallel to each other and orthogonal to the outer surface of the main body portion 61 in a state where the connection members 37 are removed from the stator 32. And provided in the main body 61.

  In the above example, the contact portion 62 and the receiving portion 75 are bent in the same direction with respect to the main body portion 61, but the contact portion 62 and the receiving portion 75 are bent in different directions with respect to the main body portion 61. It may be. That is, when the connection member 37 is viewed from the side, the shape of the connection member 37 may be Z-shaped by the contact portion 62, the main body portion 6, and the receiving portion 75.

Embodiment 5. FIG.
FIG. 17 is a sectional view showing a motor which is a rotating electrical machine according to Embodiment 5 of the present invention. Each connection member 37 includes a plate-like main body portion 61, a plate-like contact portion 62 protruding from the end portion of the main body portion 61 on the stator core 41 side, and an end portion of the main body portion 61 on the first flange 35 side. And a plate-like insertion portion 76 projecting from the terminal. The configurations of the main body portion 61 and the contact portion 62 are the same as those in the third embodiment.

  The first flange 35 is provided with a plurality of through holes 77 through which the respective insertion portions 76 are individually passed. The through holes 77 are arranged at intervals in the circumferential direction of the first flange 35. The circumferential position of each through hole coincides with the circumferential position of each connecting member 37. Therefore, in this example, the number of through holes 77 is the same as the number of connection members 37, and the respective through holes 77 are arranged at equal intervals in the circumferential direction of the first flange 35.

  The insertion portion 76 is fixed to the first flange 35 on the outer side in the axial direction than the first flange 35. In this example, the insertion portion 76 has a fixing portion 76 a along the outer surface in the axial direction of the first flange 35. Further, in this example, the fixing portion 76 a of the insertion portion 76 is fixed to the first flange 35 by the welding portion 78. Other configurations are the same as those of the third embodiment.

  Next, a procedure for attaching each connection member 37 to the stator 32 at the time of manufacturing the motor 8 will be described. FIG. 18 is a configuration diagram showing a state in which the insertion portion 76 of each connection member 37 of FIG. 17 is individually inserted into each through hole 77 of the first flange 35. FIG. 19 is a perspective view showing a state in which the first flange 35 of FIG. When attaching each connection member 37 to the stator 32, the respective contact portions 62 of each connection member 37 are individually inserted into the gap between the teeth 52 and the insulator 55 as in the third embodiment. The insertion part 76 of each connection member 37 at this time is in a state of extending in the axial direction of the main body part 61. Thereafter, the first flange 35 is fixed to the other end portion of the frame 31 while passing the shaft 34 through the through hole of the first flange 35. At this time, each insertion portion 76 is individually inserted into each through hole 77 of the first flange 35. Thereby, each insertion part 76 will be in the state which protruded from the 1st flange 35 to the axial direction outer side. Thereafter, the respective insertion portions 76 protruding from the first flange 35 are bent while the contact portions 62 of the connection members 37 are individually in contact with the axial end surfaces of the stator core 41, and the first flanges are bent. A fixing portion 76 a along the outer surface in the axial direction of 35 is formed for each insertion portion 76. Thereafter, the fixing portion 76a is fixed to the first flange 35 by welding. The fixing portion 76a may be fixed to the first flange 35 with a screw. Other procedures are the same as those in the third embodiment.

  In such a motor 8 and the electric power steering device, the insertion portion 76 of the connection member 37 is fixed to the first flange 35 in a state where it is passed through the through hole 77 of the first flange 35. In the state where the contact portion 62 of the connecting member 37 is in contact with the axial end surface of the stator core 41 by adjusting the position of the insertion portion 76 in the axial direction with respect to the first flange 35, the axially outer side of the first flange 35. Thus, the insertion portion 76 can be fixed to the first flange 35. As a result, the contact portion 62 of the connection member 37 can be more reliably brought into contact with the axial end surface of the stator core 41, and the fixing operation of the connection member 37 to the first flange 35 can be facilitated.

  Moreover, since the insertion part 76 has the fixing | fixed part 76a along the surface of the axial direction outer side of the 1st flange 35, it is made not to make the insertion part 76 project from the 1st flange 35 largely. The size of the motor 8 can be prevented from increasing. Further, the fixing operation of the fixing portion 76a to the first flange 35 can be further facilitated.

  In the above example, the number of connection members 37 is the same as the number of teeth 52, but the number of connection members 37 may be larger than the number of teeth 52, or the number of connection members 37 may be increased. It may be less than the number of teeth 52. In this case, the number of through holes 77 provided in the first flange 35 is the same as or less than the number of the connecting members 37, and each through hole 77 is aligned with the circumferential position of the connecting member 37. 1 flange 35.

  In the above example, the contact portion 62 may be elastically deformed to generate an elastic restoring force in the contact portion 62, or each of the main body portion 61 and the contact portion 62 may be elastically deformed to cause the main body portion 61 and An elastic restoring force may be generated in each of the contact portions 62. When the contact portion 62 is elastically deformed, the contact portion 62 is provided on the main body portion 61 so as to be inclined at an obtuse angle with respect to the main body portion 61 in a state where each connection member 37 is removed from the stator 32.

  In the third to fifth embodiments, the connecting portion of the contact portion 62 with respect to the main body portion 61 may be a bent portion that can be elastically deformed as in the first embodiment.

Embodiment 6 FIG.
FIG. 20 is a sectional view showing a motor which is a rotating electrical machine according to Embodiment 6 of the present invention. Each connection member 37 is individually integrated with each insulator 55. In this example, the connection member 37 and the insulator 55 are a single material formed by integral molding. Therefore, in this example, the connection member 37 is made of the same material as the insulator 55 having electrical insulation.

  The contact portion 62 of each connection member 37 is fixed to the radially inner end of each insulator 55. Each contact portion 62 is in contact with the axial end surface of the stator core 41 while being fixed to each insulator 55. In this example, the fixing portion 76 a of each insertion portion 76 is fixed to the first flange 35 with a screw 79. Other configurations and manufacturing methods are the same as those in the fifth embodiment.

  In such a motor 8 and the electric power steering apparatus, since the connection member 37 is integrated with the insulator 55, it is not necessary to manufacture the connection member 37 separately from the insulator 55, and the number of parts of the motor 8 can be reduced. it can. Thereby, manufacture of the motor 8 can be made easy and cost reduction can be achieved.

  In the above example, each connection member 37 includes the insertion portion 76, but the insertion portion 76 may not be provided. In this case, the main body portion 61 of each connection member 37 has the first flange in a state where the end portion of the main body portion 61 on the first flange 35 side is in contact with the first flange 35, as in the third embodiment. 35. In this case, the through hole 77 is not provided in the first flange 35.

Embodiment 7 FIG.
FIG. 21 is a perspective view showing a connection member of a motor according to Embodiment 7 of the present invention. FIG. 22 is an enlarged cross-sectional view showing a contact portion of the connection member of FIG. FIG. 21 shows the state of the connecting member when it is removed from the stator 32. The connection member 37 includes a cylindrical main body 61 and a plurality of contact portions 62 that respectively protrude from the end of the main body 61 on the stator core 41 side. The configuration of the main body 61 is the same as the configuration of the main body 61 of the first embodiment.

  Each contact portion 62 is a plate-like portion that protrudes from the common main body portion 61 outward in the radial direction of the main body portion 61. Further, the angle θ formed between each of the contact portions 62 and the main body portion 61 is an obtuse angle in a state where the connection member 37 is detached from the stator 32. Each connection part 63 of each contact part 62 with respect to the main-body part 61 is a bending part in which the crease | fold was formed. Each contact portion 62 is elastically deformed in a direction in which the angle θ decreases in a state in which the contact portion 62 is individually pressed against the axial end surface of the stator core 41. The connection member 37 is held between the stator core 41 and the first flange 35 in a state where the connection member 37 is stretched by the elastic restoring force of each contact portion 62. Other configurations and manufacturing methods are the same as those in the first embodiment.

  In such a motor 8 and the electric power steering device, the connecting portion 63 of each contact portion 62 with respect to the main body portion 61 is a bent portion, and the main body portion 61 when the connecting member 37 is detached from the stator 32. Since the angle θ formed between the outer surface of the cylindrical member and each contact portion 62 is an obtuse angle, each contact portion 62 can be formed simply by bending the end portion of the tubular member, and the connection member 37 can be easily manufactured. can do. Further, by pressing the connecting member 37 against the stator core 41, each contact portion 62 can be individually elastically deformed according to the shape of the stator core 41, and each contact portion 62 is formed on the axial end surface of the stator core 41. Can be contacted more reliably. Furthermore, when the contact portion 62 is disposed in the gap between the stator core 41 and the insulator 55, the contact portion 62 can be easily inserted into the gap between the stator core 41 and the insulator 55. The motor 8 can be easily manufactured.

Embodiment 8 FIG.
The configuration in which the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is a bent portion is applied to the connecting member 37 of the first embodiment, but the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is the bent portion. This configuration may be applied to each of the plurality of connection members 37 independent of each other in the third embodiment.

  23 is a perspective view showing a connecting member of a motor according to the eighth embodiment of the present invention. Each of the plurality of connection members 37 independent from each other has a plate-like main body portion 61 and a plate-like contact portion 62 protruding from the end portion of the main body portion 61 on the stator core 41 side. The connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is a bent portion similar to that of the seventh embodiment. Therefore, the angle formed by the main body 61 and the contact portion 62 is an obtuse angle in a state where the connection member 37 is detached from the stator 32. Other configurations are the same as those of the third embodiment.

  As described above, since the bent portions similar to those of the seventh embodiment are applied to each of the plurality of connection members 37 independent from each other, the shape of each connection member 37 can be further simplified, and each connection member 37 can be simplified. Can be further facilitated.

Embodiment 9 FIG.
FIG. 24 is a perspective view showing a connection member of a motor according to Embodiment 9 of the present invention. FIG. 25 is an enlarged cross-sectional view showing a contact portion of the connection member of FIG. FIG. 24 shows the state of the connecting member when it is removed from the stator 32. The connection member 37 includes a cylindrical main body 61 and a plurality of contact portions 62 that respectively protrude from the end of the main body 61 on the stator core 41 side. The configuration of the main body 61 is the same as the configuration of the main body 61 of the first embodiment.

  The connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is provided with a plurality of bent portions in which folds are formed. In this example, the first bent portion 81 and the second bent portion 82, that is, the two bent portions are provided at a distance from each other in the longitudinal direction of the contact portion 62, and the first bent portion 81 is the second bent portion 81. It is provided at a position closer to the main body 61 than the bent portion 82. The first bent portion 81 and the second bent portion 82 are bent in the same direction. The angle formed between the adjacent portions at the fold of the first bent portion 81 and the angle formed between the adjacent portions at the fold of the second bent portion 82 are obtuse angles.

  Each contact portion 62 is elastically deformed while being individually pressed against the axial end surface of the stator core 41. The connection member 37 is held between the stator core 41 and the first flange 35 in a state where the connection member 37 is stretched by the elastic restoring force of each contact portion 62. Other configurations and manufacturing methods are the same as those in the first embodiment.

  In such a motor 8 and an electric power steering device, since the plurality of bent portions 81 and 82 are provided in the respective connecting portions 63 of the contact portions 62 with respect to the main body portion 61, the connecting member 37 is attached to the stator core 41. By pressing, each contact portion 62 can be individually elastically deformed according to the shape of the stator core 41, and each contact portion 62 can be brought into contact with the end surface in the axial direction of the stator core 41 more reliably. Further, by adjusting the number and angle of the bent portions provided in the connecting portion 63, the elastic coefficient of the connecting portion 63 can be adjusted in the axial direction of the connecting member 37. Thereby, the natural frequency of the motor 8 can be adjusted, and the vibration and noise of the motor 8 can be further reliably suppressed. Furthermore, when the contact portion 62 is disposed in the gap between the stator core 41 and the insulator 55, the contact portion 62 can be easily inserted into the gap between the stator core 41 and the insulator 55. The motor 8 can be easily manufactured.

Embodiment 10 FIG.
A configuration in which a plurality of bent portions are provided in the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is applied to the connecting member 37 of the first embodiment. A configuration in which a plurality of bent portions are provided may be applied to each of the plurality of connection members 37 independent of each other in the third embodiment.

  That is, FIG. 26 is a perspective view showing a connecting member of a motor according to Embodiment 10 of the present invention. Each of the plurality of connection members 37 independent from each other has a plate-like main body portion 61 and a plate-like contact portion 62 protruding from the end portion of the main body portion 61 on the stator core 41 side. The connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is provided with a plurality of bent portions similar to those in the ninth embodiment. Other configurations are the same as those of the third embodiment.

  Thus, since the plurality of bent portions similar to those of the ninth embodiment are applied to each of the plurality of independent connection members 37, the shape of each connection member 37 can be simplified, and each connection member can be simplified. The manufacture of 37 can be facilitated. Further, the elastic coefficient of the connecting portion 63 can be adjusted in the axial direction of the connecting member 37.

  In the ninth and tenth embodiments, the number of bent portions provided in the connecting portion 63 of each contact portion 62 with respect to the main body portion 61 is two in the first bent portion 81 and the second bent portion 82. However, the number of bent portions provided in the connecting portion 63 of each contact portion 62 with respect to the main body portion 61 may be three or more. In this case, the connecting portion 63 of each contact portion 62 with respect to the main body portion 61 is provided with folds of the respective bent portions spaced from each other in the longitudinal direction of the contact portion 62.

Embodiment 11 FIG.
FIG. 27 is a perspective view showing a connection member for a motor according to Embodiment 11 of the present invention. FIG. 28 is an enlarged cross-sectional view showing a contact portion of the connection member of FIG. FIG. 27 shows the state of the connecting member when it is removed from the stator 32. The connection member 37 includes a cylindrical main body 61 and a plurality of contact portions 62 that respectively protrude from the end of the main body 61 on the stator core 41 side. The configuration of the main body 61 is the same as the configuration of the main body 61 of the first embodiment.

  The shape of the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is an arc shape that is smoothly connected to the main body portion 61. The contact portion 62 protrudes outward in the radial direction of the main body portion 61 while smoothly bending from the main body portion 61 at the connecting portion 63.

  Each contact portion 62 is elastically deformed while being individually pressed against the axial end surface of the stator core 41. The connection member 37 is held between the stator core 41 and the first flange 35 in a state where the connection member 37 is stretched by the elastic restoring force of each contact portion 62. Other configurations and manufacturing methods are the same as those in the first embodiment.

  In such a motor 8 and the electric power steering device, since the shape of each connecting portion 63 of each contact portion 62 with respect to the main body portion 61 is an arc shape, the stator core is pressed by pressing the connecting member 37 against the stator core 41. Each contact part 62 can be individually elastically deformed according to the shape of 41, and each contact part 62 can be made to contact the axial direction end surface of the stator core 41 more reliably. Further, by adjusting the arcuate diameter of the connecting portion 63, the elastic coefficient of the connecting portion 63 can be adjusted in the axial direction of the connecting member 37. Thereby, the natural frequency of the motor 8 can be adjusted, and the vibration and noise of the motor 8 can be further reliably suppressed. Furthermore, when the contact portion 62 is disposed in the gap between the stator core 41 and the insulator 55, the contact portion 62 can be easily inserted into the gap between the stator core 41 and the insulator 55. The motor 8 can be easily manufactured.

Embodiment 12 FIG.
The configuration in which the shape of the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is an arc shape is applied to the connection member 37 of the first embodiment, but the shape of the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is used. The configuration in which the arc is in an arc shape may be applied to each of the plurality of independent connection members 37 of the third embodiment.

  29 is a perspective view showing a motor connecting member according to Embodiment 12 of the present invention. Each of the plurality of connection members 37 independent from each other has a plate-like main body portion 61 and a plate-like contact portion 62 protruding from the end portion of the main body portion 61 on the stator core 41 side. The shape of the connecting portion 63 of the contact portion 62 with respect to the main body portion 61 is an arc shape that is smoothly connected to the main body portion 61 as in the eleventh embodiment. The contact part 62 protrudes radially outward of the stator core 41 while smoothly bending from the main body part 61 at the connecting part 63. Other configurations are the same as those of the third embodiment.

  As described above, since the arc-shaped coupling portion 63 similar to that of the eleventh embodiment is applied to each of the plurality of connection members 37 independent from each other, the shape of each connection member 37 can be further simplified. Manufacturing of each connection member 37 can be facilitated. Further, the elastic coefficient of the connecting portion 63 can be adjusted in the axial direction of the connecting member 37.

  In Embodiments 3, 6, 8, 10, and 12, the number of connection members 37 is the same as the number of teeth 52, but the number of connection members 37 may be greater than the number of teeth 52. Alternatively, the number of connection members 37 may be smaller than the number of teeth 52. When the number of connecting members 37 is greater than the number of teeth 52, the plurality of contact portions 62 come into contact with the common teeth 52. Further, when the number of the connecting members 37 is less than the number of the teeth 52, there are teeth 52 that the contact portions 62 do not contact, and the contact portions 62 are spaced as evenly as possible in the circumferential direction of the stator core 41. Be placed.

  In the first, second, seventh, ninth and eleventh embodiments, the number of contact portions 62 protruding from the common main body portion 61 is the same as the number of teeth 52, but the number of contact portions 62 is changed to the teeth 52. The number of contact portions 62 may be less than the number of teeth 52. When the number of the contact parts 62 is larger than the number of the teeth 52, the plurality of contact parts 62 come into contact with the common tooth 52. Further, when the number of the contact portions 62 is less than the number of the teeth 52, there are teeth 52 that the contact portions 62 do not contact, and each contact portion 62 is as evenly spaced as possible in the circumferential direction of the stator core 41. Be placed.

  Further, in the fourth embodiment, the receiving portion 75 is applied to each of the plurality of connection members 37 of the third embodiment. A plurality of receiving portions 75 may be applied to the connection member 37 from which the plurality of contact portions 62 protrude from the main body portion 61. In this case, each receiving portion 75 protrudes from the end portion of the main body portion 61 on the first flange 35 side. In this case, the number of receiving portions 75 protruding from the common main body portion 61 may be the same as or different from the number of contact portions 62 protruding from the common main body portion 61. . Further, in this case, the receiving portion 75 protruding from the main body portion 61 may be an annular plate continuous in the circumferential direction of the main body portion 61.

  Moreover, in Embodiment 5, the insertion part 76 is applied to each of the plurality of connection members 37 of Embodiment 3, but the connection members 37 of Embodiments 1, 2, 7, 9 and 11, that is, You may apply the some insertion part 76 to the connection member 37 from which the some contact part 62 protrudes from the common main-body part 61. FIG. In this case, each insertion portion 76 protrudes from the end portion of the main body portion 61 on the first flange 35 side. In this case, the number of insertion portions 76 protruding from the common main body portion 61 may be the same as or different from the number of contact portions 62 protruding from the common main body portion 61. Good. Further, in this case, the number of through holes 77 provided in the first flange 35 is the same as or less than the number of the insertion portions 76, and each through hole 77 is arranged in the circumferential direction of each insertion portion 75. The first flange 35 is provided in accordance with the position.

  Moreover, in each said embodiment, although the whole connection member 37 is comprised with the same material, the material which comprises the main-body part 61 and the material which comprises the contact part 62 are good also as a mutually different material. For example, the main body 61 may be made of resin and the contact part 62 may be made of metal. Alternatively, the main body 61 and the contact portion 62 may be different from each other, and the connection member 37 may be configured by combining a component as the main body portion 61 and a component as the contact portion 62.

  In each of the above embodiments, the connection member 37 is provided only between the stator core 41 and the first flange 35. However, the present invention is not limited to this, and the stator core 41 and the second flange 36 are not limited thereto. The connecting member 37 may be provided only between the stator core 41 and the first flange 35, and between the stator core 41 and the second flange 36. It may be provided.

  Moreover, in each said embodiment, although the number of the teeth 52 of the stator core 41 is 18, it is not limited to this, You may make the number of the teeth 52 different from 18. Furthermore, in each said embodiment, although the number of the permanent magnets 44 provided in the rotor 33 is 14, it is not limited to this, The number of the permanent magnets 44 is made into a number different from 14. Also good. Moreover, you may apply this invention to the rotary electric machine which does not have a permanent magnet. Examples of the rotating electrical machine that does not have a permanent magnet include an induction machine, SynRM (Synchronous Reluctance Motor), and SRM (Switched Reluctance Motor).

  32 Stator, 33 Rotor, 35 First flange (support member), 36 Second flange (support member), 37 Connection member, 41 Stator core, 42 Armature winding, 52 teeth, 54 Coil portion, 55 Insulator, 61 Main body part, 62 Contact part, 63 Connection part, 75 Receiving part, 76 Insertion part, 77 Through hole, 81 1st bending part, 82 2nd bending part

Claims (12)

A stator having a cylindrical stator core and armature windings provided on the stator core;
A rotor provided rotatably inside the stator,
A support member that is disposed on the outer side in the axial direction of the stator, and rotatably supports the rotor, and a connection member provided between the support member and the stator core;
The connecting member protrudes from a main body portion provided on the support member and an end portion of the common main body portion on the stator core side, and is arranged at a distance from each other in the circumferential direction of the stator core. A plurality of contact portions,
Each said contact part is the rotary electric machine which is contacting the axial direction end surface of the said stator core. A stator having a cylindrical stator core and armature windings provided on the stator core;
A rotor provided rotatably inside the stator,
A support member disposed on the outer side in the axial direction of the stator and rotatably supporting the rotor; and provided between the support member and the stator core, and spaced apart from each other in a circumferential direction of the stator core. With a plurality of connecting members arranged
Each of the connection members has a main body provided on the support member, and a contact portion protruding from an end of the main body on the stator core side,
Each said contact part is the rotary electric machine which is contacting the axial direction end surface of the said stator core. The stator core has a plurality of teeth arranged at intervals in the circumferential direction of the stator core;
The number of the contact parts is the same as the number of the teeth,
The rotating electrical machine according to claim 1, wherein each of the contact portions is in contact with an end surface in the axial direction of each of the teeth. The stator core has a plurality of teeth arranged at intervals in the circumferential direction of the stator core;
The armature winding has a plurality of coil portions provided to the teeth via insulators,
Each said contact part is a rotary electric machine as described in any one of Claims 1-3 arrange | positioned in the clearance gap between the said teeth and the said insulator.   The connection part of the said contact part with respect to the said main-body part is a bending part which can be elastically deformed so that the said contact part may be displaced to the radial direction of the said stator core with respect to the said main-body part. Rotating electric machine.   The connecting member has a receiving portion that protrudes from the end of the main body on the support member side along the surface of the support member on the stator core side and receives the surface of the support member on the stator core side. The rotating electrical machine according to any one of claims 1 to 5, further comprising: The connection member has an insertion portion protruding from an end portion of the main body portion on the support member side,
The support member is provided with a through hole through which the insertion portion is passed,
The rotating electrical machine according to any one of claims 1 to 5, wherein the insertion portion is fixed to the support member in a state of being passed through the through hole. The stator core has a plurality of teeth arranged at intervals in the circumferential direction of the stator core;
The armature winding has a plurality of coil portions provided to the teeth via insulators,
When viewed along the axial direction of the stator, the end surfaces on the radially inner side and the radially outer side of the main body portion are formed between the radially inner end surface of the teeth and the radially inner end surface of the insulator. The rotating electrical machine according to any one of claims 1 to 7, which is located between the rotating electrical machines.   The rotating electrical machine according to any one of claims 1 to 8, wherein each of the contact portions generates an elastic restoring force in a direction in contact with the stator core.   The rotating electrical machine according to any one of claims 1 to 9, wherein a connecting portion of the contact portion with respect to the main body portion is provided with a plurality of bent portions in which folds are formed.   The rotating electrical machine according to any one of claims 1 to 9, wherein a shape of a connecting portion of the contact portion with respect to the main body portion is an arc shape. The electric power steering apparatus provided with the rotary electric machine as described in any one of Claims 1-11.

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