JP6264932B2 - Brushless motor and electric power steering apparatus - Google Patents

Description

  The present invention relates to a brushless motor and an electric power steering apparatus including the same.

Conventionally, as a steering device, an electric power steering device that drives an electric motor according to a steering torque that a driver steers a steering wheel, decelerates the rotation of the electric motor with a gear box, and applies a steering assist force to a steering mechanism has been widespread. doing.
As such an electric power steering apparatus, for example, Patent Document 1 discloses an electric motor and an electric motor in which a control unit including a control board on which a control circuit for driving and controlling the electric motor is mounted integrally. A body-type electric power steering apparatus is disclosed. In such an electric power steering apparatus, the control unit is connected to the electric motor via a motor terminal (power feeding terminal) protruding from the motor flange.

JP 2010-173466 A

By the way, in order to make the electric motor into an insertion structure, the electric resistance must be reduced to the same level as the method of fixing the motor terminal with a screw from the viewpoint of temperature increase due to energy loss and energization. For this reason, in the electric motor having the insertion structure, it is necessary to increase the contact area between the male terminal and the female terminal, or to increase the contact pressure between the terminals.
However, in the technique described in Patent Document 1, consideration is not given to making the motor terminal a shape suitable for assembly by insertion.
Accordingly, the present invention has been made paying attention to the above-mentioned unsolved problems of the conventional example, and in a brushless motor having a terminal with an insertion structure, a terminal area corresponding to an increase in the contact area of the terminal and the contact pressure of the terminal It is an object to provide a brushless motor having a product and an electric power steering apparatus including the same.

  In order to solve the above problems, an aspect of a brushless motor according to the present invention includes a stator core and a stator having a coil wound around the stator core, a motor case that houses the stator, and an axial end of the motor case. A power feeding terminal provided alongside the stator in the axial direction of the motor case and connected to the end of the coil, the power feeding terminal being stacked in the axial direction of the motor case. A plurality of terminal plates covered with resin and formed integrally; a plurality of terminal portions connected to the ends of the coil; a plurality of connector insertion portions electrically connected to an external connector; The connector insertion portion has a distal end on the outer peripheral side of the terminal plate extending substantially parallel to the axial direction of the motor case, and A notch is formed in a portion corresponding to the connector insertion portion on the outer peripheral side of the annular portion, and is formed from the external connector. The coil is supplied with power through a power supply terminal.

  In this way, the connector insertion part is formed by bending, and the notch part is formed in the annular part, so that the connector insertion part which is a terminal of an insertion structure without increasing the outer diameter of the motor; The contact area with the external connector can be increased. In addition, the connector insertion part is integral with the terminal plate and can receive a load when the connector insertion part is inserted, so that it is possible to cope with an increase in contact pressure of the terminal.

In the brushless motor, the notch portion may have a shape in which a part on the outer peripheral side of the annular portion is cut out on an arc so that the connector insertion portion is exposed.
Further, in the brushless motor, the notch is in contact with the base end on the stator side of the connector insertion portion, is in contact with the connector insertion portion, and the connector is inserted in the axial direction of the motor case. A reinforcing portion that supports a load applied to the portion may be provided.
Thus, by providing the reinforcing portion, a larger load can be received when the external connector is inserted.

Further, in the brushless motor, the reinforcing portion is formed integrally with the resin of the annular portion, and is provided so as to protrude from the notch portion in a direction perpendicular to the axial direction of the motor case, and is made of resin. May be.
Further, in the brushless motor, the reinforcing portion has an end opposite to the connector insertion portion protruding from the bottom surface of the annular portion on the stator side and extending in a substantially inner diameter direction of the annular portion. May be formed.
Furthermore, in the brushless motor, the connector insertion portion may be a plurality of plate-like terminals, and the plate-like terminals may be arranged apart from each other in parallel in the plate thickness direction.
Furthermore, in the brushless motor, the connector insertion portion may be connected to a floating type external connector.
Furthermore, in the brushless motor, the connector insertion portion may be plated.

  An aspect of the electric power steering apparatus according to the present invention is a drive control of the brushless motor so as to generate any one of the brushless motors described above and a steering assist torque corresponding to a steering torque transmitted from a steering wheel. A control unit having a control board, and the external connector is a control unit side connector formed in the control unit.

  According to the brushless motor and the electric power steering apparatus including the brushless motor according to the present invention, it is possible to cope with an increase in the contact area of the terminal and the contact pressure of the terminal in the brushless motor having the terminal of the insertion structure.

1 is a schematic configuration diagram of an electric power steering apparatus according to a first embodiment of the present invention. It is a perspective view which shows the principal part of the electric power steering apparatus in the middle of an assembly. It is a perspective view which shows the principal part of the electric power steering apparatus in the middle of an assembly. It is a perspective view which shows the brushless motor in the middle of an assembly. It is a figure which shows the connector formed in the brushless motor. It is a perspective view which shows the state by which the terminal plate was laminated | stacked. It is a perspective view from an angle different from FIG. It is a perspective view which shows the terminal for electric power feeding. It is a top view of FIG. It is a side view of FIG. It is a perspective view which shows the state which reversed the electric power feeding terminal to the motor shaft direction from the state of FIG. It is a bottom view of FIG. It is a figure which shows the state which mounted | wore the reduction gear box with the control unit. It is a figure explaining interference with the type | mold of resin insert molding. It is a perspective view which shows the terminal for electric power feeding of the 2nd Embodiment of this invention. FIG. 16 is a plan view of FIG. 15.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
[Schematic configuration of electric power steering device]
First, a schematic configuration of an electric power steering apparatus (EPS) according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic configuration diagram of an electric power steering apparatus according to the present embodiment. In the figure, reference numeral 1 denotes an electric power steering device, and a steering mechanism 2 that is steered by a driver includes a steering wheel 3 and a steering shaft 4 to which a steering force applied from the driver to the steering wheel 3 is transmitted. .

The steering shaft 4 has an input shaft 4a and an output shaft 4b. One end of the input shaft 4 a is connected to the steering wheel 3, and the other end is connected to one end of the output shaft 4 b via the torque sensor 5.
The steering force transmitted to the output shaft 4 b is transmitted to the intermediate shaft 7 via the universal joint 6 and further transmitted to the pinion shaft 9 via the universal joint 8. The steering force transmitted to the pinion shaft 9 is transmitted to the tie rod 11 via the steering gear 10 to steer a steered wheel (not shown).

Here, the steering gear 10 is configured in a rack-and-pinion type having a pinion 10a connected to the pinion shaft 9 and a rack 10b meshing with the pinion 10a, and the rotational motion transmitted to the pinion 10a goes straight in the rack 10b. It has been converted to movement.
A steering assist mechanism 12 that transmits a steering assist force to the output shaft 4b is connected to the output shaft 4b of the steering shaft 4. The steering assist mechanism 12 includes a reduction gear (worm reducer) 13 connected to the output shaft 4b and a brushless motor 14 connected to the worm reducer 13 and generating a steering assist force for the steering system. Yes.

The brushless motor 14 is driven and controlled by the control unit 15. The control unit 15 includes a controller 16 and a motor drive circuit 17.
The torque sensor 5 is for detecting the steering torque applied to the steering wheel 3 and transmitted to the input shaft 4a, and is relative to the input shaft 4a and the output shaft 4b connected by a torsion bar (not shown). A large displacement (rotational displacement) is detected in correspondence with a change in impedance of the coil pair. The torque detection value T output from the torque sensor 5 is input to the controller 16.

  The controller 16 operates when power is supplied from the on-vehicle battery B. The controller 16 receives the vehicle speed detection value V detected by the vehicle speed sensor 18 in addition to the torque detection value T, and performs steering assist control for applying a steering assist force corresponding to these to the steering system. Specifically, a steering assist torque command value for generating the steering assist force by the brushless motor 14 is calculated by a known procedure, and feedback control is performed based on the calculated steering assist torque command value and the motor current detection value. Then, the motor current command value of the brushless motor 14 is calculated. Then, the controller 16 supplies the calculated motor current command value to the motor drive circuit 17 configured by an inverter circuit.

The motor drive circuit 17 forms a motor drive current based on the input motor current command value and an angle detection signal from a resolver 20 that detects a rotor rotation angle of the brushless motor 14 described later. Then, by supplying this motor drive current to the brushless motor 14, the brushless motor 14 generates a steering assist force corresponding to the steering assist torque command value.
In addition, as a rotation angle sensor other than the resolver 20, a magnetic sensor using a Hall IC or an MR element can be used.

  2 and 3 are perspective views showing the main part of the electric power steering apparatus 1 during assembly. As shown in FIGS. 2 and 3, the electric power steering apparatus 1 includes a steering column 21 in which an input shaft 4 a of the steering shaft 4 is rotatably mounted, and a reduction gear box 22 connected to the steering column 21. The brushless motor 14 and the control unit 15 are mounted on the reduction gear box 22 in a direction orthogonal to the axis L of the steering shaft 4. Here, reference numeral 23 denotes a mounting bracket for attaching the steering shaft 4 to the vehicle body side member.

[Details of reduction gearbox, control unit and brushless motor]
Next, the structures of the reduction gear box 22, the control unit 15, and the brushless motor 14 of this embodiment will be described in detail with reference to FIGS.
The reduction gear box 22 is formed by die-casting, for example, any one of materials having high thermal conductivity, such as aluminum, aluminum alloy, magnesium, and magnesium alloy.
As shown in FIGS. 2 and 3, the reduction gear box 22 is integrally connected to a worm reduction device storage portion 22a for storing the worm reduction device 13 and on the same axis as the worm reduction device storage portion 22a. And a torque sensor storage portion 22b for storing 5. The reduction gear box 22 includes a motor mounting flange 22c to which the brushless motor 14 is attached.

As shown in FIG. 3, the torque sensor housing portion 22b is provided with an opening 22d, and the torque sensor male terminals 5a to 5c protrude from the opening 22d toward the outside of the torque sensor housing portion 22b. . Here, the torque sensor male terminals 5 a to 5 d are connected to the winding start and winding end of the coil pair constituting the torque sensor 5, and extend in the direction along the motor axis M of the brushless motor 14. ing.
As shown in FIGS. 2 and 3, the control unit 15 includes a case main body 15a that houses a control board on which the controller 16 and the motor drive circuit 17 described above are mounted.

  A torque sensor socket 15b that is electrically connected to the controller 16 and a motor power supply socket 15c and a resolver socket 15d that are electrically connected to the motor drive circuit 17 are formed on the side of the case body 15a as control unit side connectors. Has been. The torque sensor socket 15b, the motor power supply socket 15c, and the resolver socket 15d each have a female terminal, and the control unit 15 is moved along the motor shaft M, so that the brushless motor 14 attached to the motor attachment flange 22c is attached to the brushless motor 14. It is removable.

When the control unit 15 is mounted, the torque sensor male terminals 5a to 5d are connected to the torque sensor socket 15b, the connector insertion portions 42a to 42c are connected to the motor power supply socket 15c which is an external connector, and the resolver male type is connected to the resolver socket 15d. Terminals 20a to 20d are connected.
These control unit side connectors are floating type connectors. Further, the male terminals (torque sensor male terminals 5a to 5d, the connector insertion portions 42a to 42c and the resolver male terminals 20a to 20d, which are motor-side feeding male terminals) that engage with the control unit side connectors are floating mechanisms. Can also be provided.
The brushless motor 14 is a three-phase motor, and is fixed to a substantially cylindrical motor case 14a having one end opened and the other end closed, and one end opening edge of the motor case 14a. And a motor flange 14b fixed in contact with the flange 22c.

As shown in FIG. 4, the motor case 14a includes a substantially annular stator 30 attached to the inner wall of the motor case 14a, a rotor (not shown) disposed on the inner peripheral side of the stator 30, and a rotor. The resolver 20 (see FIG. 1) for detecting the rotation angle of the motor case 14a and a power supply terminal 40 provided in line with the stator 30 in the direction of the motor axis M are built in the end of the motor case 14a on the opening side.
The stator 30 has a stator core on which metal core plates are laminated, and a three-phase (UVW phase) coil is wound on the inner peripheral side of the stator core via an insulator.

The terminal of each phase coil is connected to the power supply terminal 40, and the sensor harness of the resolver 20 is connected to the resolver male terminals 20a to 20d. Here, as shown in FIGS. 3 and 5, the resolver male terminals 20 a to 20 d are disposed in the opening 20 e formed in the motor flange 14 b so as to be connectable to the resolver socket 15 d. The resolver male terminals 20a to 20d extend in the direction along the motor shaft M, respectively.
As shown in FIG. 8, the power feeding terminal 40 is formed by resin insert molding of four metal terminal plates 41 a to 41 d that are stacked at a predetermined interval as shown in FIGS. 6 and 7. Are integrally formed. As shown in FIGS. 8 and 9, the power feeding terminal 40 includes connector insertion portions 42 a to 42 c that are motor-side power feeding terminals, and terminal portions 43 a to 43 r to which terminal ends of coils of the stator 30 are connected, And an annular portion 44 covered with resin.

  As shown in FIGS. 6 and 7, the terminal plates 41 a to 41 c protrude substantially radially outside the terminal regions 411 a to 411 d forming the annular portion 44 and radially outward of the terminal regions 411 a to 411 d, 43a to 43r or a plurality of protruding regions 412a to 412t forming at least one of the connector insertion portions 42a to 42c. The terminal areas 411a to 411d electrically connect the protruding areas 412a to 412t provided on the same terminal plates 41a to 41c. For example, in the example illustrated in FIGS. 6 and 7, the terminal plate 41 a includes a terminal region 411 a serving as the annular portion 44, a projecting region 412 t serving as the connector insertion portion 42 c, and projecting serving as the terminal portions 43 d, 43 j, and 43 p. It has areas 412g, 412m and 412s.

  The connector insertion portions 42a to 42c are bent at right angles so that the tips of the protruding regions 412a to 412c of the terminal plates 41a to 41c extend substantially parallel to the motor shaft M and protrude to the opposite side of the stator 30. It is formed by processing. The connector insertion portions 42a to 42c are plate-like terminals, and are provided so as to protrude from the motor flange 14b so as to be spaced apart from each other in parallel in the plate thickness direction, as shown in FIGS. As shown in FIGS. 3 and 5, a motor power supply guide portion 14 c is formed around the connector insertion portions 42 a to 42 c in the motor flange 14 b. The motor power supply guide portion 14c is a member that protrudes in a wall shape from the motor flange 14b, and is set to a height that protrudes to the outside from the tips of the connector insertion portions 42a to 42c.

The terminal portions 43a to 43r are projecting regions 412d to 412t and 412b of the terminal plates 41a to 41d. As shown in FIG. 7, the annular portions 44 are arranged in the radial direction so as not to overlap each other when viewed from the motor axial direction. It protrudes toward the direction.
On the outer peripheral side of the annular part 44, a notch part 45 is formed in a part corresponding to the connector insertion parts 42a to 42c. In the example illustrated in FIGS. 7 to 9, an arcuate cutout 45 is formed in a region on the outer peripheral side where the connector insertion portions 42 a to 42 c of the annular portion 44 are provided radially outward. The cutout portion 45 is formed so that the annular portion 44 and the connector insertion portions 42a to 42c do not overlap when viewed from the motor shaft M direction. The power supply terminal 40 according to the present embodiment has such a notch 45, so that the contact area of the connector insertion portions 42a to 42c with the external connector can be increased. That is, the connector insertion portions 42 a to 42 c can have a larger side surface area toward the annular portion 44 than the notch portion 45 compared to the case where the notch portion 45 is not provided.

  Further, as shown in FIGS. 10 to 12, reinforcing portions 46 a to 46 c that come into contact with the stator 30 side at the base ends of the connector insertion portions 42 a to 42 c are provided in the notch portion 45 of the annular portion 44. The reinforcing portions 46a to 46c are made of a resin that is molded integrally with the resin of the annular portion 44, and on the stator 30 side of the connector insertion portions 42a to 42c, in a direction perpendicular to the motor axis M direction from the notch portion 45. Each is provided so as to protrude and extend in the direction of the motor shaft M. The reinforcing portions 46a to 46c can support a load applied in the axial direction of the motor shaft M from the opposite side of the stator 30 to the connector insertion portions 42a to 42c. For this reason, the power supply terminal 40 according to the present embodiment inserts the connector insertion portions 42a to 42c into the external connector when the contact pressure between the connector insertion portions 42a to 42c and the external connector is increased in order to reduce the electrical resistance. It is possible to prevent damage to the resin in the annular portion 44 and bending or breakage of the connector insertion portions 42a to 42c that occur during the operation.

  In the brushless motor 14 of the present embodiment, first, terminal plates 41a to 41d in which the tips of the protruding regions 412a to 412c to be the connector insertion portions 42a to 42c are bent are installed in a resin insert molding jig or the like, and the resin insert The power supply terminal 40 is manufactured by molding. Next, as shown in FIG. 4, the stator 30, the power feeding terminal 40, the rotor (not shown), and the resolver 20 are accommodated in the motor case 14a. Furthermore, the motor flange 14b is fixed to the motor case 14a in a state where a part of the connector insertion portions 42a to 42c and the resolver male terminals 20a to 20d protrude from the motor flange 14b to the opposite side of the motor case 14a. The brushless motor 14 is manufactured.

[Mounting operation of main parts of electric power steering device]
Next, the mounting operation of the main part of the electric power steering apparatus 1 will be summarized. First, the motor flange 14 b of the brushless motor 14 is fixed to the motor mounting flange 22 c of the reduction gear box 22. At this time, from the surface of the motor flange 14b facing the motor mounting flange 22c, the motor insertion shafts 42a to 42c and the resolver male terminals 20a to 20d are in the same direction as the torque sensor male terminals 5a to 5d. It extends in the direction along M.

In this state, the control unit 15 is arranged in a direction in which the sockets 15b to 15d formed in the control unit 15 face the corresponding male terminals, and the control unit 15 is moved in the direction along the motor axis M. Then, the sockets 15b to 15d formed in the control unit 15 are connected to the torque sensor male terminals 5a to 5d, the connector insertion portions 42a to 42c, and the resolver male terminals 20a to 20d.
Since the sockets 15b to 15d formed in the control unit 15 are floating type sockets, it is assumed that the torque sensor male terminals 5a to 5d, the connector insertion portions 42a to 42c, and the resolver male terminals 20a to 20d have torque. Even when the connection directions of the sensor socket 15b, the motor power supply socket 15c, and the resolver socket 15d are deviated, the connector can be reliably connected.
Thereby, as shown in FIG. 12, the brushless motor 14 and the control unit 15 can be integrally mounted on the reduction gear box 22.

As described above, the brushless motor 14 according to the present embodiment includes a stator 30 having a stator core and a coil wound around the stator core, a motor case 14a that houses the stator 30, and a shaft of the motor case 14a that is the motor shaft M. A feed terminal 40 provided at the end of the direction alongside the stator 30 in the axial direction of the motor case 14a and connected to the end of the coil. The feed terminal 40 is provided in the axial direction of the motor case 14a. An annular portion 44 in which a plurality of laminated terminal plates 41a to 41d are covered with a resin and integrally formed, a plurality of terminal portions 43a to 43r connected to the end of the coil, and an external connector are electrically connected Connector insertion portions 42a to 42c, and the connector insertion portions 42a to 42c are connected to the terminal plate 41a. The outer peripheral side tip of 41 d is formed to be bent so as to be substantially parallel to the axial direction of the motor case 14 a and to protrude to the opposite side of the stator 30, and the connector insertion portions 42 a to 42 c on the outer peripheral side of the annular portion 44. A notch portion 45 is formed in a portion corresponding to, and power is supplied to the coil from the external connector via the power feeding terminal 40.
Here, in the motor of the insertion structure, it is preferable to reduce the electrical resistance of the terminal from the viewpoint of temperature rise due to energy loss or energization. In order to reduce the electrical resistance, it is necessary to increase the terminal contact area or increase the terminal contact pressure.

In the present embodiment, since the connector insertion portions 42a to 42c are provided to be separated from each other in the plate thickness direction, the connector insertion portions 42a to 42c can be obtained even if the width direction dimensions of the connector insertion portions 42a to 42c are increased. The arrangement distance in the plate thickness direction does not change. Therefore, even if each width dimension of the connector insertion portions 42a to 42c is increased, the arrangement distance of the female terminals of the motor power supply socket 15c does not change, and the motor drive mounted on the control board in the control unit 15 is not changed. The connection interval with the circuit 17 does not change.
Therefore, the output of the brushless motor 14 can be increased only by changing only the shape of the motor power supply socket 15c in response to the change in the width direction dimensions of the connector insertion portions 42a to 42c. That is, parts such as the control board of the control unit 15 can be shared, and the control unit 15 can be reduced in size.

  Further, in the present embodiment, by providing the notch portion 45 in the annular portion 44 of the power feeding terminal 40, the side surfaces of the connector insertion portions 42a to 42c can be enlarged toward the motor shaft M side. It is possible to increase the terminal contact area without increasing the motor diameter. In the case where the notch 45 is not provided, if the side surfaces of the connector insertion portions 42a to 42c are increased toward the motor shaft M side, the upper and lower molds and the diagonal lines of the connector insertion portions 42a to 42c are shown in the resin insert molding shown in FIG. The indicated area interferes. On the other hand, the power supply terminal 40 of the present embodiment is provided with the notch portion 45 so that the upper and lower molds and the connector insertion portions 42a to 42c do not interfere with each other at the time of resin insert molding. For this reason, it is possible to make the terminal contact area large enough to realize a desired electrical resistance design value without being affected by the motor outer diameter that is restricted from the cost and layout aspects.

Furthermore, in this embodiment, the connector insertion parts 42a-42c are formed by a bending process. For this reason, for example, the terminal plate and the connector insertion part are made of different members, and the manufacturing process can be simplified as compared with the case where the terminal plate and the connector insertion part are joined and integrated by welding after resin insert molding. it can.
Furthermore, in this embodiment, the connector insertion parts 42a-42c are integral with the terminal plates 41a-41c. For this reason, it can receive the load at the time of insertion of an external connector, the damage of the resin of the annular part 44 generated when inserting the connector insertion part 42a-42c into an external connector, and the bending of the connector insertion part 42a-42c. And damage can be prevented, so that it is possible to cope with an increase in the contact pressure of the terminal.
Furthermore, in the present embodiment, reinforcing portions 46 a to 46 c are provided in the cutout portion 45 of the annular portion 44. For this reason, the terminal 40 for electric power feeding of this embodiment can respond to the contact pressure of a still larger terminal compared with the case where there are no reinforcement parts 46a-46c.

<Second Embodiment>
Next, with reference to FIG. 15 and FIG. 16, the electric power steering apparatus 1 which concerns on the 2nd Embodiment of this invention is demonstrated. The electric power steering device 1 according to the present embodiment is different from the electric power steering device 1 according to the first embodiment in the configuration of the reinforcing portions 46d to 46f provided in the annular portion 44 of the power feeding terminal 40, but otherwise. The configuration is the same. That is, the electric power steering apparatus 1 according to the present embodiment has the apparatus configuration described with reference to FIGS.

The reinforcing portions 46d to 46f of the present embodiment are in contact with the stator 30 side of the base ends of the connector insertion portions 42a to 42c, respectively, similarly to the reinforcing portions 46a to 46c of the first embodiment, and the resin of the annular portion 44 It is made of resin that is molded in one piece. Further, the reinforcing portions 46d to 46f of the present embodiment are arranged on the stator 30 side of the connector insertion portions 42a to 42c from the notch portion 45 to the motor axis M direction, similarly to the reinforcing portions 46a to 46c of the first embodiment. It protrudes in the vertical direction and extends in the direction of the motor axis M. Further, in the reinforcing portions 46d to 46f of the present embodiment, end portions on the opposite side to the connector insertion portions 42a to 42c protrude from the bottom surface of the annular portion 44 on the stator 30 side, and extend in a substantially inner diameter direction of the annular portion 44. Exists.
The power feeding terminal 40 according to the present embodiment includes the reinforcing portions 46d to 46f described above, and therefore the shaft of the motor shaft M from the opposite side of the stator 30 with respect to the connector insertion portions 42a to 42c as compared with the first embodiment. It can support larger loads in the direction.

<Modification>
In the above embodiment, when a three-phase brushless motor is applied as the brushless motor,
However, a multiphase brushless motor having four or more phases can also be applied.
In the above embodiment, the connector insertion portions 42a to 42c may be plated. Thereby, the contact resistance of the connector insertion parts 42a-42c can be stabilized.
Furthermore, in the above-described embodiment, the case where the present invention is applied to the electro-mechanical integrated electric power steering apparatus in which the electric motor and the control unit are integrally mounted on the gear box has been described. The present invention can also be applied to an electric power steering apparatus having a configuration in which they are arranged close to each other and are connected by connectors.

Furthermore, in the above embodiment, the notch 45 has an arc shape, but when viewed from the direction of the motor shaft M, the notch 45 has another shape as long as the annular portion 44 and the connector insertion portions 42a to 42c do not overlap. May be. For example, the notch 45 may be three recesses notched radially inward on the outer peripheral side of the annular portion 44 overlapping the connector insertion portions 42a to 42c.
Furthermore, in the said embodiment, although the reinforcement parts 46a-46f were made into resin integrally molded with resin of the annular part 44, it may be another members which consist of other raw materials, such as resin or a metal. . At this time, the reinforcing portions 46a to 46f and the annular portion 44 may be configured to be integrated by a method such as fitting.

1: Electric power steering device 2: Steering mechanism 3: Steering wheel 4: Steering shaft 4a: Input shaft 4b: Output shaft 5: Torque sensor 5a, 5b, 5c, 5d: Torque sensor male terminal 6: Universal joint 7: Intermediate Shaft 8: Universal joint 9: Pinion shaft 10: Steering gear 10a: Pinion 10b: Rack 11: Tie rod 12: Steering assist mechanism 13: Worm speed reducer 14: Brushless motor 14a: Motor case 14b: Motor flanges 14c, 14d, 14e, 14f: Motor power supply guide 15: Control unit 15a: Case body 15b: Torque sensor socket 15c: Motor power supply socket 15d: Resolver socket 16: Controller 17: Data drive circuit 18: Vehicle speed sensor 20: Resolver 20a, 20b, 20c, 20d: Resolver male terminal 20e: Opening 21: Steering column 22: Reduction gear box 22a: Worm reduction gear storage 22b: Torque sensor storage 22c : Motor mounting flange 22d: Opening 40: Power feeding terminals 41a to 41d: Terminal plates 42a to 42c: Connector insertion parts 43a to 43r: Terminal part 44: Ring part 45: Notch part 46a to 46f: Reinforcing part 411a to 411d: Terminal area 412a to 412t: Projection area B: Battery M: Motor shaft

Claims (9)

A stator having a stator core and a coil wound around the stator core;
A motor case that houses the stator;
A power supply terminal provided in line with the stator in the axial direction of the motor case at the axial end of the motor case, and connected to the end of the coil;
The power feeding terminal includes a ring portion integrally formed by covering a plurality of terminal plates laminated in the axial direction of the motor case with a resin, a plurality of terminal portions connected to end portions of the coils, A plurality of connector insertion portions electrically connected to the external connector,
The connector insertion portion is formed by bending the tip of the outer peripheral side of the terminal plate so as to extend substantially parallel to the axial direction of the motor case and to protrude to the opposite side of the stator,
A portion corresponding to the connector insertion portion on the outer peripheral side of the annular portion is formed with a notch,
A brushless motor, wherein power is supplied to the coil from the external connector via the power supply terminal.   2. The brushless motor according to claim 1, wherein the notch has a shape in which a part of the outer peripheral side of the annular portion is cut out on an arc so that the connector insertion portion is exposed.   The notch portion is provided with a reinforcing portion that abuts a proximal end of the connector insertion portion on the stator side and supports a load applied to the connector insertion portion in the axial direction of the motor case. The brushless motor according to claim 1 or 2.   4. The reinforcing portion is formed integrally with the resin of the annular portion, is provided to protrude from the notch portion in a direction perpendicular to the axial direction of the motor case, and is made of resin. The brushless motor described in 1.   The reinforcing portion is formed such that an end opposite to the connector insertion portion protrudes from the bottom surface of the annular portion on the stator side and extends in a substantially inner diameter direction of the annular portion. The brushless motor according to claim 4.   The said connector insertion part is a some plate-shaped terminal, These plate-shaped terminals are mutually spaced apart and parallelly arranged in the plate | board thickness direction, The any one of Claims 1-5 characterized by the above-mentioned. The brushless motor described.   The brushless motor according to claim 1, wherein the connector insertion portion is connected to the external connector of a floating type.   The brushless motor according to claim 1, wherein the connector insertion portion is plated. The brushless motor according to any one of claims 1 to 8,
A control unit having a control board for driving and controlling the brushless motor so as to generate a steering assist torque according to the steering torque transmitted from the steering wheel,
The electric power steering apparatus according to claim 1, wherein the external connector is a control unit side connector formed in the control unit.

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