JP2008109837A - Motor apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor apparatus equipped with a brushless motor, compatible with automatic installation line and is easy of attachment performance. <P>SOLUTION: In the motor apparatus integrally fixed to a motor, having a housing for fixing a stator or a resolver stator, and a motor terminal exposed from the housing to the outside, the housing is provided with the resolver stator 8b arranged on the outside of a resolver rotor 8a, rotating integrally with a rotating shaft 6; and a recessed section 12e for containing a flexible conductor, connected to the resolver stator 8b from the axial direction of the rotating shaft 6. The tip of the conductor contained in the containing section 12e is arranged contiguously to the motor terminal exposed to the outside, and the circuit terminal of a controller 120 is connected to the tip of the conductor. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a motor device.

  Conventionally, a brushless motor is mainly used as a motor for an EPS (Electric Power Steering) device. In order to control the rotation of the rotor, the brushless motor is provided with a resolver as a rotation angle sensor for detecting the rotation angle of the rotor. The resolver is connected to a control circuit, and the control circuit controls the drive current supplied to the motor according to the rotational position of the rotor detected by the resolver.

  For example, Patent Document 1 discloses a brushless motor in which a resolver is incorporated in a motor case. The resolver detects the rotation angle of the rotor based on the relative rotation between the resolver rotor and the resolver stator. Therefore, in the assembly process, it is necessary to align the resolver rotor and the resolver stator in the circumferential direction. However, the brushless motor of Patent Document 1 is difficult to adjust because the resolver is assembled in the motor case. Further, the wiring connected to the resolver must be pulled out of the motor case, and it is difficult to connect the control circuit and the resolver.

  For example, Patent Document 2 discloses a brushless motor in which a resolver stator is disposed outside the motor as an assembly that facilitates the assembly. This brushless motor is assembled by the following processes, for example.

The following procedure is mentioned as an example of the assembly method.
First, the resolver stator is temporarily fixed to the resolver holding part of the motor. Next, in order to adjust the angle of the resolver rotor and resolver stator that are already assembled to the position of 0 degrees, the angle of the resolver stator is adjusted in the rotational direction. Then, the resolver stator is fixed with screws or the like. In this way, it is necessary to manually attach the resolver to the resolver holding part of the motor one by one.
JP 2003-32989 A JP 2003-88081 A

  By the way, in the resolver, a wire lead is connected to the resolver stator in order to output a detection signal, and a connector is provided at the tip of the wire lead to facilitate connection with an ECU or the like. In the assembly process, it is necessary to hold and assemble the resolver stator and the connector. For this reason, it takes time and effort to fix the resolver stator to the housing, which is a burden on the operator. Further, when the resolver stator and the connector are assembled, even if they are connected by flexible wire leads, they are not integrated, and therefore cannot be adapted to the automatic assembly line.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a motor device including a brushless motor that can be easily attached to an automatic attachment line.

  In order to solve the above problems, the invention according to claim 1 is a motor device fixed integrally to a motor having a housing for fixing a stator or a resolver stator and a motor terminal exposed to the outside from the housing. The housing includes a resolver stator disposed outside a resolver rotor that rotates integrally with the rotating shaft, and a housing portion that houses a flexible conductor connected to the resolver stator from the axial direction of the rotating shaft. The gist of the invention is that the tip of the conductor is disposed adjacent to the motor terminal. According to this configuration, the resolver motor and the conductor can be easily assembled by accommodating the resolver stator and the conductor connected to the resolver stator in the accommodating portion from the axial direction of the rotating shaft, and automatic assembly It becomes possible to correspond to the line. Moreover, since the front-end | tip of the conductor accommodated in the accommodating part is arrange | positioned adjacent to a motor terminal, the connection with an external electric power feeding terminal and the circuit terminal of a control apparatus becomes easy.

  According to a second aspect of the present invention, in the motor device according to the first aspect, the portion of the housing portion that is related to the tip of the conductor leads from the outer side in the axial direction of the housing to the inner side, and further radially outward at the inner side. The gist is that it is opened. According to this configuration, by accommodating the tip of the conductor from the axial direction, the tip is exposed to the outside in the radial direction, and can be exposed to the outside in the radial direction together with the motor terminal inside.

  According to a third aspect of the present invention, in the motor device according to the first or second aspect, the housing portion is located radially inward from a mounting surface of a driven body driven by the motor device. The gist. According to this configuration, since the housing portion is covered by the mounting surface of the driven body, it is not necessary to take an airtight countermeasure due to the presence of the housing portion.

  According to a fourth aspect of the present invention, in the motor device according to any one of the first to third aspects, the housing has a control circuit, a case for housing the control circuit, and an exterior exposed from the case. The gist of the present invention is that a control device including a circuit terminal is integrally fixed, and the circuit terminal is connected to a tip of the conductor. According to this configuration, since the tip of the conductor housed in the housing portion is disposed adjacent to the motor terminal, the circuit terminal of the control device is easily connected to the tip of the conductor.

  Invention of Claim 5 is a motor apparatus as described in any one of Claims 1-4. WHEREIN: The said resolver stator and the front-end | tip of the said conductor are fixed to the holder which covers the said accommodating part, The holder has a rotation mechanism that allows the resolver stator to rotate relative to the tip of the conductor, and after the tip of the conductor is fixed to the housing, the holder is rotated in the circumferential direction of the motor, The gist is to adjust the circumferential position of the fixed resolver stator. According to this configuration, it is possible to perform attachment using the automatic attachment line by the holder to which the resolver stator and the conductor are fixed, and it is possible to provide a motor device that can be easily attached to the automatic attachment line. it can. Further, the position of the resolver can be easily adjusted by rotating the holder that covers the housing housing.

  According to a sixth aspect of the present invention, in the motor device according to the fifth aspect, the holder is composed of a first member and a second member, and the first member fixes a tip of the conductor. The second member fixes the resolver stator, and the first member and the second member are detachably engaged with the second member in the axial direction of the rotation shaft. This is the gist. According to this configuration, the length-adjustable conductor and the resolver stator are integrated to facilitate the assembly thereof, and the resolver can be rotated relative to each other only by separating the first member in the axial direction. The stator position can be adjusted.

  According to a seventh aspect of the present invention, in the motor device according to the fifth aspect, the holder includes a first member and a second member, and the first member fixes a tip of the conductor. The second member fixes the resolver stator, and the first member and the second member are engaged so that the second member is rotatable about the rotation axis. It is a summary. According to this configuration, the length-adjustable conductor and the resolver stator are integrated to facilitate the assembly thereof, and the position of the resolver stator can be adjusted by rotating the second member.

  According to an eighth aspect of the present invention, in the motor device according to the fifth aspect, the rotating mechanism is configured such that the first member that fixes the tip of the conductor is the second member that the resolver stator is fixed. The snap-fit engagement structure is assembled to the first and second members, and the snap-fit engagement structure is capable of releasing the assembly of the first member and the second member, and the rotation axis is the center. The gist is that the second member can be turned. According to this configuration, the second member can be easily rotated by releasing the snap-fit engagement structure.

  The invention according to claim 9 is a motor device characterized in that the motor device according to any one of claims 1 to 8 is used in a power steering device. By using this motor device, it is possible to support a power steering device with good cost reduction and good steering performance.

  Therefore, according to the above-described invention, it is possible to provide a motor device including a brushless motor that can be easily attached to an automatic attachment line and can be easily assembled.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the motor case 10 of the brushless motor 1 includes a motor case main body 11 formed in a bottomed cylindrical shape, and an end plate 12 that closes an opening of the motor case main body 11. A stator 2 is fixed to the inner peripheral surface of the motor case body 11. The stator 2 has a plurality of teeth 3 around which a motor coil 4 is wound. A rotor 5 is disposed inside the stator 2. The rotor 5 has a rotating shaft 6, and the rotating shaft 6 is rotatably supported by bearings 13 and 14 provided on the bottom portion of the motor case body 11 and the end plate 12. The housing described in the claims refers to the motor case 10 (the motor case body 11 and the end plate 12).

  A power feeding unit (motor terminal) 7 is provided inside the end plate 12, and three-phase (U, V, W) driving power is supplied to the motor coil 4 of the stator 2 through the power feeding unit 7. A rotating magnetic field is generated by the driving power, and the rotor 5 is rotated by the rotating magnetic field.

  The end plate 12 has a receiving portion 12a recessed from the outer surface toward the inside of the motor case 10, and the resolver 8 is disposed in the receiving portion 12a. The resolver 8 is composed of a resolver rotor 8a fixed to the rotating shaft 6 and a resolver stator 8b that is disposed on the radially outer side of the resolver rotor 8a and formed in an annular shape. The resolver stator 8b rotates together with the rotating shaft 6.

  As shown in FIG. 2, the accommodating portion 12 a of the end plate 12 is covered with a holder 20. The holder 20 is provided with a cover plate 21 as a second member that is formed in an annular shape and through which the rotary shaft 6 passes, and a connector holder 22 as a first member is connected to the cover plate 21. As shown in FIG. 3, a resolver stator 8b is fixed to the cover plate 21, and the resolver fixed to the end plate 12 is secured by attaching the cover plate 21 to the end plate 12 (see FIG. 2 and the like). The stator 8b is disposed on the radially outer side of the resolver rotor 8a (see FIG. 1).

  Further, the end plate 12 has a bearing receiving recess 12d for fixing the outer ring of the bearing 13 with the inner ring fixed to the rotating shaft 6 without a gap, and a resolver stator 8b coaxially processed with the bearing receiving recess 12d. A resolver housing recess 12e is formed for housing the outer periphery. Thus, the rotating shaft 6 and the resolver stator 8b are disposed concentrically.

  As shown in FIG. 3, the first end of a wiring 31 as a flexible conductor is connected to a coil (not shown) of the resolver stator 8b. The wiring 31 is connected to the connector holder 22 by fixing pieces 32a and 32b. It is fixed to. Further, the second end of the wiring 31 is connected to a terminal (not shown) of the sensor connector 30, and the sensor connector 30 is fixed to the connector holder 22. The sensor connector 30 is housed in the connector housing recess 12p shown in FIG. The connector receiving recess 12p is continuous with the resolver receiving recess 12e, and communicates from the outer side in the axial direction of the end plate 12 to the inner side and is further opened radially outward on the inner side. The connector housing recess 12p is formed so as to be positioned radially inward from the mounting surface of a driven body (not shown) driven by the motor 1 including the resolver housing recess 12e.

  A plurality of (two in this embodiment) mounting holes 21b for fixing the cover plate 21 to the end plate 12 are formed in the cover plate 21 formed in an annular shape. Screws 60a and 60b shown in FIG. 1 are inserted into the mounting holes 21b, respectively, and the screws 60a and 60b are screwed into screw holes 12c (see FIG. 2) formed in the end plate 12, thereby covering the cover plate 21. Is fixed to the end plate 12.

  Each attachment hole 21b is formed in the shape of a long hole extending along the circumferential direction, and the cover plate 21 can be rotated in the circumferential direction by loosening screws 60a and 60b for fixing the cover plate 21. Thereby, the position of the circumferential direction of the resolver stator 8b fixed to the cover plate 21 can be adjusted.

  The cover plate 21 and the connector holder 22 constituting the holder 20 are connected by a snap fit engagement structure as a rotation mechanism. As shown in FIG. 4, the snap-fit engagement structure includes an engagement hole 21 a formed in the cover plate 21 and a hook portion 22 a formed in the connector holder 22. The engagement hole 21a is formed in a rectangular shape extending along a direction orthogonal to the radial direction of the motor, and further, by forming a engagement portion by cutting out the opening end in the circumferential direction along the circumferential direction. The overall shape is a cross. The hook portion 22a includes two locking pieces 41 and 42 arranged along the rotation direction of the cover plate 21, that is, the circumferential direction.

  As shown in FIG. 5 (a), the locking piece 41 is formed in a J-shape with the base end protruding to the inside (left side in the figure) and the tip protruding to the cover plate 21 side (right side in the figure). Has been. The locking piece 42 is formed symmetrically with the locking piece 41. Further, the tips of the pair of locking pieces 41 and 42 bulge outward (on the opposite surface side) to form a claw portion, and the non-insertion side (left side in the drawing) of the claw portion is a slope 41a. It has become. Although not shown in the drawing, the locking piece 42 is formed in the same manner as the locking piece 41.

  The locking pieces 41 and 42 are inserted into the engaging holes 21a, and are bent toward the direction in which the locking pieces 41 and 42 come closer to each other by abutting against the engaging portions 51 of the engaging holes 21a when inserted. When the insertion is completed, the coupled state is maintained by the self-returning force. The engaging portion 51 of the engaging hole 21 a has inclined surfaces 51 a and 51 b formed in the front and back direction of the cover plate 21. These slopes 51a and 51b are formed to facilitate insertion and removal of the locking pieces 41 and 42. When the cover plate 21 and the connector holder 22 are in an engaged state by the snap-fit engagement structure, if a force is applied in a direction in which the cover plate 21 and the connector holder 22 are separated, the cover plate 21 and the connector holder 22 are relatively By the gentle movement, the locking pieces 41 and 42 come into contact with the inclined surface 51b. And both the locking pieces 41 and 42 are bent toward the direction which mutually approaches, and the locking pieces 41 and 42 come out from the engagement hole 21a. That is, the engagement state between the cover plate 21 and the connector holder 22 is released.

  The connector holder 22 is formed with a pair of restricting pieces 43 and 44 that are inserted into the engaging holes 21a. Further, the connector holder 22 is formed with a protrusion 45 that curves along the peripheral surface 21 c of the cover plate 21. The restricting pieces 43 and 44 are in contact with the radially inner surface of the engagement hole 21a, and the protrusion 45 is in contact with the peripheral surface 21c, thereby restricting relative movement in the radial direction between the cover plate 21 and the connector holder 22 in the engaged state. To do.

  The connector holder 22 is fixed to the end plate 12 by a snap-fit engagement structure. As shown in FIG. 2, the snap-fit engagement structure includes a hook portion 22 b formed on the connector holder 22 and a locked piece 12 b formed on the inner surface of the housing portion 12 a of the end plate 12. . This snap-fit engagement structure will be described in detail with reference to FIG.

  As shown in FIG. 5B, the hook portion 22 b is configured by two locking pieces 33 and 34 that are disposed on the connector holder 22 along the top and bottom and face each other. Two hook claws 33a, 33b, 34a, 34b are formed at the tips of the locking pieces 33, 34, respectively. More specifically, the upper locking piece 33 is provided with claws 33a and 33b facing the resolver stator 8b, and the lower locking piece 34 is provided with claws 34a and 34b facing the sensor connector 30. The insertion side is slanted and the anti-insertion side is formed flat so that these claws and protrusions do not come off once fitted. The to-be-latched piece 12b is composed of a pair of left and right to-be-latched pieces, and both the to-be-latched pieces are engaged portions 55a, which engage with the claws 33a, 33b, 34a, 34b of the locking piece 33 55b is formed. Between both engaged pieces, protrusions 33c and 34c are inserted as release means that protrude from the inner surfaces of the locking pieces 33 and 34. The protrusions 33c and 34c are formed to release the engagement after the connector holder 22 is snap-engaged to the end plate 12 depending on circumstances. That is, a flat jig is inserted only from the insertion direction (axial direction) of the connector holder 22 through a through hole 22c as a release means formed in the connector holder 22, and is pressed against the protrusions 33c, 34c. The pieces 33 and 34 are opened, and the snap-fit engagement is released.

The assembly of the brushless motor configured as described above will be described.
First, the cover plate 21 and the connector holder 22 are previously engaged with a snap-fit engagement structure, and the holder 20 is automatically attached by a machine arm or the like. When the holder 20 is mounted on the motor case 10 side, the cover plate 21 is fitted so as to cover the motor output side of the brushless motor 1, and screws 60a and 60b are inserted into the mounting holes 21b as shown in FIG. Then, it is screwed into the screw hole 12c of the end plate 12.

  Next, by further pushing the cover plate 21 in the axial direction, the snap fit engagement for connecting the cover plate 21 and the connector holder 22 is released, and the connector holder 22 is ended by the snap fit engagement structure with the end plate 12. It is fixed to the plate 12. Thereafter, the operator rotates the cover plate 21 to adjust the angle between the resolver rotor 8 a and the resolver stator 8 b, tightens the screws 60 a and 60 b, and fixes the cover plate 21 to the end plate 12.

Next, characteristic actions and effects of the present embodiment will be described.
(1) The connector holder 22 and the cover plate 21 to which the resolver stator 8b is fixed are combined to form the holder 20, and the holder 20 is attached to the end plate 12. According to this configuration, it is possible to provide a brushless motor that can be attached using the automatic attachment line by the integrated holder and can be easily attached to the automatic attachment line.

  (2) The mechanism of the holder that enables relative rotation in the circumferential direction of the motor is snap-fit engagement means, and after the tip is separated from the holder and fixed to the end plate, the cover is rotated. According to this configuration, by using the snap fit, it is possible to enable attachment on an automatic attachment line on which a manipulator or the like is mounted.

  (3) The holder has a snap-fit for temporary fastening and a snap-fit for final fastening separately, and the holder can be rotated by removing the snap-fit for temporary fastening. According to this configuration, attachment is performed in two stages. For this reason, it can operate in steps and can confirm an assembly state.

  (4) The connector holder 22 is fixed to the end plate 12 by snap-fit engagement, and release means for releasing the snap-fit engagement is provided. This release means is released only by inserting the release tool from the mounting direction of the connector holder 22. Thereby, it can be easily released without interference only by the mounting direction of the connector holder 22. Moreover, it can cancel | release without damaging, recognizing the cancellation | release state of the connector holder 22. FIG.

  (5) The end plate 12 is formed with a bearing receiving recess 12d for fixing the outer ring of the bearing 13 with the inner ring fixed to the rotating shaft 6 without a gap, and a resolver stator coaxially processed with the bearing receiving recess 12d. A resolver housing recess 12e for housing the outer periphery of 8b is formed. Thus, the rotating shaft 6 and the resolver stator 8b are disposed concentrically. With this configuration, the rotation shaft 6 and the resolver stator 8b are arranged concentrically, and rotation can be detected well.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. In addition, about the same part as 1st Embodiment, the same code | symbol is attached | subjected and description and drawing may be abbreviate | omitted.

  As shown in FIG. 7, the end plate 72 of the brushless motor 1 a is provided with a receiving portion 72 a (connector receiving recess 72 f and resolver receiving recess 72 e), and the receiving portion 72 a is covered with a holder 80.

The holder 80 is provided with a cover plate 81 that is formed in an annular shape and through which the rotating shaft 6 of the motor is inserted, and a connector holder 82 is connected to the cover plate 81.
The end plate 72 (as in the first embodiment) is formed with a bearing receiving recess 12d for fixing the outer ring of the bearing 13 (see FIG. 1) with the inner ring fixed to the rotating shaft 6 without any gap. At the same time, a resolver receiving recess 72e for receiving the outer periphery of the resolver stator 8b that is coaxially processed with the bearing receiving recess is formed. Thus, the rotating shaft 6 and the resolver stator 8b are disposed concentrically.

  As shown in FIG. 8, the cover plate 81 is provided with a mounting hole 81b extending in the circumferential direction, and screws 60a and 60b are inserted into the mounting hole 81b as shown in FIG. The cover plate 81 is fixed to the end plate 72 by 60a and 60b.

  The cover plate 81 and the connector holder 82 are connected by a snap-fit engagement structure. As shown in FIG. 8, the snap-fit engagement structure includes an engagement hole 81 a formed in the cover plate 81 and a hook portion 82 b formed at the base end of the end plate 72. As shown in FIG. 9A, a stepped portion 81d is formed in the engagement hole 81a by narrowing the groove width on the connector holder 82 side.

  The hook portion 82b is composed of two hook portions 91a and 91b arranged along the radial direction and extending along the circumferential direction. As shown in FIG. 9B, the hook portions 91a and 91b are formed so as to be inserted through the engagement holes 81a and engage with the step portions 81d formed in the engagement holes 81a. Joint protrusions are formed. Therefore, the cover plate 81 and the connector holder 82 are held in the engaged state by inserting the hook portions 91a and 91b into the engagement hole 81a.

  Further, a projection 82 a that is curved along the peripheral surface 81 c of the cover plate 81 is formed at the base end of the connector holder 82. The length of the hook portions 91a and 91b in the circumferential direction is set to be shorter than the length of the engagement hole 81a. Therefore, the cover plate 81 and the connector holder 82 can be relatively moved in the circumferential direction with the projection 82a as a guide in the engaged state by the snap-fit engagement structure.

  At the tip of the connector holder 82, a locking piece 82c constituting a snap-fit engagement structure is formed. As shown in FIGS. 10 (a) and 10 (b), the locking piece 82c is engaged with locking portions 101 and 102 that are formed on the end plate 72 and constitute a snap-fit engagement structure, whereby a connector holder 82 is obtained. Is fixed to the end plate 72. A through groove 72c is formed between the locking portions 101 and 102 as a release means that reaches the hook 82d formed on the upper portion of the locking piece 82c after the snap-fit engagement. The through groove 72c is formed to be released depending on circumstances after the connector holder 82 is snap-fit engaged with the end plate 72. That is, by inserting a flat jig from the insertion groove (cylinder direction) of the connector holder 82 through the through-groove 72c formed in the connector holder 82 and pressing it against the claw 82d, the locking piece 82c is pushed open. The snap-fit engagement will be released.

  In the brushless motor configured as described above, first, the cover plate 81 and the connector holder 82 are first engaged with a snap-fit engagement structure, and the holder 80 is automatically attached by a machine arm or the like. When the holder 80 is attached to the end plate 72, the cover plate 81 is fitted so as to cover the motor output side of the brushless motor, and the connector holder 82 is fixed to the end plate 72 by the snap-fit engagement structure. Then, the screws 60 a and 60 b are inserted into the mounting holes 81 b and screwed into the screw holes of the end plate 72. Next, the operator adjusts the angle between the resolver rotor 8 a and the resolver stator 8 b by rotating the cover plate 81, and tightens the screws 60 a and 60 b to fix the cover plate 81 to the end plate 72.

As described above, according to the present embodiment, the following effects can be obtained.
(6) The connector holder 82 and the cover plate 81 to which the resolver stator 8 b is fixed are combined to form a holder 80, and the holder 80 is attached to the end plate 72. According to this configuration, it is possible to provide a brushless motor that can be attached using the automatic attachment line by the integrated holder 80 and can be easily attached to the automatic attachment line.

  (7) An engagement hole 81a is formed in the cover plate 81, a hook portion 82b inserted into the engagement hole 81a is formed in the connector holder 82, and the length of the engagement hole 81a in the circumferential direction is set to the hook portion 82b. It was longer than the circumferential length. With this configuration, the cover plate 81 can be rotated while the cover plate 81 and the connector holder 82 are in an engaged state by the snap-fit engagement structure constituted by the engagement hole 81a and the hook portion 82b, and the resolver The stator 8b can be aligned.

  (8) The connector holder 82 is fixed to the end plate 72 by snap-fit engagement, and release means for releasing the snap-fit engagement is provided. The release means is released only by inserting the release tool from the mounting direction of the connector holder 82. Thereby, it can be easily released without interference by only the mounting direction of the connector holder 82. Further, the connector holder 82 can be released without being damaged while recognizing the released state.

  (9) The end plate 72 is formed with a bearing receiving recess 12d for fixing the outer ring of the bearing 13 (see FIG. 1) with the inner ring fixed to the rotary shaft 6 without a gap, and is coaxial with the bearing receiving recess. A resolver receiving recess 72e for receiving the outer periphery of the resolver stator 8b is formed. Thus, the rotating shaft 6 and the resolver stator 8b are disposed concentrically. With this configuration, the rotation shaft 6 and the resolver stator 8b are arranged concentrically, and rotation can be detected well.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 12, the motor device of this embodiment includes the brushless motor 1 in the first embodiment.

  The end plate 12 of the brushless motor 1 is formed in a rectangular parallelepiped shape, and at the top thereof, as shown in FIG. 14A, a first housing recess 12f as a connector housing recess that opens in the radial direction of the brushless motor 1 and a first housing recess 12f. Two housing recesses 12g are formed. The sensor connector 30 is disposed in the first housing recess 12f, and the motor winding terminal connector 110 as a motor connector is disposed in the second housing recess 12g. The sensor connector 30 and the motor winding terminal connector 110 are arranged along a direction orthogonal to the rotation shaft 6 of the brushless motor 1. The motor winding terminal connector 110 is provided with motor side motor winding terminals (motor terminals) 111a, 111b, and 111c. These motor-side motor winding terminals 111 a to 111 c are connected to the motor coil 4 via the power feeding unit 7.

  A control device 120 is fixed to the upper surface of the end plate 12 by screws 130. As shown in FIG. 12, the control device 120 is provided with a control device housing 121, and a control circuit (not shown) is mounted on the control device housing 121. Covered. The control device housing 121 is made of a metal such as aluminum, for example, and functions as a heat sink (heat sink) for a transistor or the like included in the control circuit. The control device 120 is provided with a power connector 123 to which drive power is supplied and a signal connector (not shown) to which a control signal is supplied at the axial end (first end) of the brushless motor 1. It has been.

  As shown in FIG. 13, the control device 120 includes three circuit-side motor winding terminals 124a as circuit terminals for supplying three-phase (U, V, W) driving power to the stator motor coils. , 124b, 124c, and a sensor circuit connector 125 as a circuit connector connected to the sensor connector 30 (see FIG. 3) of the brushless motor 1 is provided at an axial end (second end) of the brushless motor 1. ing. The tip portions of the circuit-side motor winding terminals 124 a to 124 c are formed in a plate shape extending along the axial direction of the rotating shaft 6 of the brushless motor 1. In the sensor circuit connector 125, a plurality of circuit-side rotation sensor terminals (not shown) extending along the radial direction of the brushless motor 1 are arranged. These circuit side rotation sensor terminals are connected to the motor side circuit sensor terminals in the sensor connector 30 by fitting the sensor circuit connector 125 with the sensor connector 30 (see FIG. 14A).

  A mounting portion 126 is formed in the control device housing 121. The attachment portion 126 is formed in a U shape covering the circuit side motor winding terminals 124 a to 124 c and the tip of the sensor circuit connector 125. As shown in FIG. 12, the lower surface of the attachment portion 126 is in contact with the upper surface of the end plate 12. A mounting hole 127 is formed through the mounting portion 126. A screw hole 12h is formed in the end plate 12 at a position corresponding to the mounting hole 127, and a screw 130 (see FIG. 12) is screwed into the screw hole 12h through the mounting hole 127, thereby the end plate 12 is end-fitted. The control device 120 is attached to the control device housing 121 on the plate 12, that is, the brushless motor 1.

  The screw hole 12h is formed at the end of the end plate 12 (upper and lower ends in FIG. 14A) and along the axial direction of the rotating shaft 6 of the brushless motor 1 (left and right in FIG. 14A). Two are arranged side by side. The attachment hole 127 is formed at a position corresponding to the screw hole 12h. By arranging the screw hole 12h and the attachment hole 127 along the rotation axis direction of the brushless motor 1, the attachment portion 126 is firmly fixed to the end plate 12, and the control device 120 is connected to the rotation shaft 6 of the brushless motor 1. It can be prevented from tilting against. Therefore, since an excessive load is not applied to the sensor connector 30, the sensor circuit connector 125, and the terminals 111a to 111c and 124a to 124c, there is no possibility of damaging each terminal.

  In the control device 120 configured as described above, the lower surface of the mounting portion 126 is brought into contact with the upper surface of the end plate 12 from the radial direction of the brushless motor 1. Then, the sensor circuit connector 125 of the control device 120 is fitted with the sensor connector 30 of the brushless motor 1. A snap fit structure is applied to the sensor connector 30 and the sensor circuit connector 125. That is, the sensor connector 30 and the sensor circuit connector 125 are formed with engagement portions (not shown) that engage with each other, and the engagement portions prevent separation of the sensor connector 30 and the sensor circuit connector 125. Both engaging portions are configured to be disengaged by a special tool so that both sensor connector 30 and sensor circuit connector 125 can be separated without damaging both engaging portions. It has become.

  When both the sensor connector 30 and the sensor circuit connector 125 are fitted, the position of the screw hole 12h of the end plate 12 and the position of the mounting hole 127 formed in the mounting portion 126 of the control device 120 substantially coincide with each other. For this reason, as shown in FIG. 12, the control device 120 is attached to the brushless motor 1 by screwing the screws 130 into the respective screw holes 12h via the mounting holes 127.

  When the sensor connector 30 and the sensor circuit connector 125 are fitted, the motor-side motor winding terminals 111a to 111c provided in the brushless motor 1 are connected to the circuit-side motor winding provided in the control device 120. The terminals 124 a to 124 c are overlapped in the radial direction of the brushless motor 1. Further, the positions of screw holes 112a to 112c (see FIG. 14A) formed in the motor side motor winding terminals 111a to 111c and the through holes formed in the circuit side motor winding terminals 124a to 124c. The positions of 128a to 128c (see FIG. 13) substantially coincide with each other. For this reason, screws 131a to 131c (see FIG. 14B) are screwed into the screw holes 112a to 112c through the through holes 45a to 45c, so that the motor side motor winding terminals 111a to 111c and The circuit side motor winding terminals 124a and 124c are connected to each other.

As described above, according to this embodiment, in addition to the effects of the first embodiment, the following effects can be obtained.
(10) By moving the control device 120 relative to the brushless motor 1 along the radial direction of the brushless motor 1, the motor side motor winding terminals 111a to 111c of the brushless motor 1 and the circuit side of the control device 120 The motor winding terminals 124a to 124c are arranged at positions where they can be connected (joining facing positions), and the sensor connector 30 of the brushless motor 1 and the sensor circuit connector 125 of the control device 120 are fitted. And the control apparatus 120 is attached to the end plate 12 by making the attachment part 126 formed in the control apparatus housing 121 contact the end plate 12 of the brushless motor 1 and screwing in the screw 130. . Therefore, no load is applied to the terminals 111a to 111c, 124a to 124c, the sensor connector 30 and the sensor circuit connector 125, and the sensor connector 30, the sensor circuit connector 125 and the terminals 111a to 111c, 124a to 124c can be easily connected in a stable state. Can be fixed. Further, since no load is applied to the terminals even when the screws are fastened, there is no possibility of damaging each terminal.

In addition, you may implement each said embodiment in the following aspects.
-The above-mentioned 3rd embodiment showed the motor device which attached control device 120 to brushless motor 1 of a 1st embodiment. This may be embodied in a motor device in which a control device configured in the same manner as the control device 120 of the second embodiment is attached to the brushless motor 1a of the second embodiment. Needless to say, the configurations of the brushless motors 1 and 1a and the control device 120 are not limited to the above embodiment.

  The motor device is used for a power steering device. According to the present invention, it is possible to suppress the load from being applied to each terminal, and it is possible to more securely fix the control device to the housing, and it is possible to provide a brushless motor for power steering that requires high reliability. The motor device is attached to the mounting surface of the driven body whose end plates 12, 72 are driven by the motor device. And the accommodating parts 12a and 72a formed in the end plates 12 and 72 are located in the radial inside from the attachment surface. Therefore, since the accommodating portions 12a and 72a are covered with the mounting surface, it is not necessary to take a security measure due to the existence of the accommodating portions 12a and 72a.

Sectional drawing of the brushless motor in 1st Embodiment. Installation explanatory drawing of a brushless motor. The perspective view of a brushless motor. The exploded perspective view of a brushless motor. (A) and (b) are attachment explanatory drawings of a brushless motor. Installation explanatory drawing of the brushless motor in this Embodiment. Attachment explanatory drawing of the brushless motor in 2nd Embodiment. The exploded perspective view of a brushless motor. (A) and (b) are attachment explanatory drawings of a brushless motor. (A) and (b) are attachment explanatory drawings of a brushless motor. Installation explanatory drawing of a brushless motor. The partial cross section figure of the motor apparatus of 3rd Embodiment. The exploded perspective view of a motor device. (A) is a partial top view of a motor, (b) is a partial top view of a motor apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 1a ... Brushless motor, 8 ... Resolver, 8a ... Resolver rotor, 8b ... Resolver stator, 11 ... Motor case main body, 12, 72 ... End plate, 12a, 72a ... Housing part, 20, 80 ... Holder, 21, 81 ... Cover plate as second member, 22, 82 ... Connector holder as first member, 21a ... Engagement hole constituting snap fit engagement structure, 12b ... Engagement piece constituting snap fit engagement structure , 82b, 91, 91b ... a hook part constituting a snap fit engagement structure, 82c ... a locking piece constituting a snap fit engagement structure, 22a, 22b ... a hook part constituting a snap fit engagement structure, 30 ... sensor Connector, 111a-111c ... Motor terminal, 120 ... Control device, 124a-124c ... Circuit side motor winding terminal 25 ... sensor circuit connector.

Claims (9)

A motor device fixed integrally to a motor having a housing for fixing a stator or resolver stator and a motor terminal exposed to the outside from the housing,
The housing is provided with a recess for accommodating a resolver stator disposed outside a resolver rotor that rotates integrally with the rotation shaft and a flexible conductor connected to the resolver stator from the axial direction of the rotation shaft. The motor device is characterized in that the tip of the conductor is disposed adjacent to the motor terminal. The motor device according to claim 1,
The motor device according to claim 1, wherein a portion of the housing portion related to the tip of the conductor is opened from the outer side in the axial direction of the housing to the inner side and is further opened radially outside at the inner side. The motor device according to claim 1 or 2,
The motor device according to claim 1, wherein the housing portion is located radially inward from a mounting surface of a driven body driven by the motor device. In the motor apparatus as described in any one of Claims 1-3,
In the housing, a control circuit, a case containing the control circuit, and a control device including a circuit terminal exposed to the outside from the case are integrally fixed,
A motor device, wherein the circuit terminal is connected to a tip of the conductor. In the motor apparatus as described in any one of Claims 1-4,
The resolver stator and the tip of the conductor are fixed to a holder that covers the housing portion, and the holder has a rotation mechanism that allows the resolver stator to rotate relative to the tip of the conductor,
After fixing the front end of the conductor to the housing, the holder is rotated in the circumferential direction of the motor, and the circumferential position of the resolver stator fixed to the holder is adjusted.
The motor apparatus characterized by the above-mentioned. The motor device according to claim 5,
The holder is composed of a first member and a second member,
The first member fixes the tip of the conductor;
The second member fixes the resolver stator;
The motor device, wherein the first member and the second member are detachably engaged with the first member in an axial direction of the rotation shaft. The motor device according to claim 5,
The holder is composed of a first member and a second member,
The first member fixes the tip of the conductor;
The second member fixes the resolver stator;
The motor device, wherein the first member and the second member are engaged so that the second member can rotate about the rotation shaft. The motor device according to claim 5,
The rotating mechanism is a snap-fit engagement structure in which a first member that fixes the tip of the conductor is assembled to a second member that has the resolver stator fixed thereto,
The snap-fit engagement structure can release the assembly of the first member and the second member, and can rotate the second member around the rotation shaft. Is configured to
The motor apparatus characterized by the above-mentioned.   The motor apparatus as described in any one of Claims 1-8 is used for a power steering apparatus, The motor apparatus characterized by the above-mentioned.

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