JP6060324B2 - Resolver device - Google Patents

Description

  The present invention relates to a resolver device.

  Conventionally, a motor stator provided in a motor case and a motor rotor provided on the inner side of the motor stator and fixed to the motor shaft, and a resolver rotor and a motor case provided on the motor shaft can be adjusted and freely rotated. There has been proposed a resolver built-in motor including a resolver including a resolver stator provided with a radial groove and a rear cover provided at an end of a motor case and having an adjustment opening (for example, Patent Document 1). In this resolver built-in motor, a jig is inserted from an adjustment opening formed in the rear lid, and a mounting screw inserted through a long hole of the resolver stator and screwed into a screw hole of a fixing member of the motor case is loosened. Then, the jig is engaged with the groove of the resolver stator, and the resolver stator is rotated left or right while checking the output of the resolver using a measuring instrument, and the zero point position of the motor and the resolver is aligned. The zero point of the resolver can be adjusted without disassembling the motor.

JP 2005-80430 A

  In the above resolver built-in type motor, not only at the time of manufacturing the resolver stator attached to the case for the first time, but also at the time of removing the resolver stator from the motor case and reattaching it, It is necessary to rotate the resolver stator while checking the output of the resolver using a measuring device to align the zero point positions of the motor and resolver. Therefore, it is preferable to simplify the work when the resolver stator is detached from the motor case and attached again.

  The resolver device according to the present invention is mainly intended to simplify the work when the resolver stator is detached from the case and attached again.

  The resolver device of the present invention employs the following means in order to achieve the main object described above.

The resolver device of the present invention is
A resolver device comprising a resolver having a resolver rotor attached to a rotating shaft of a motor and a resolver stator attached to a case with a recess formed on the outer peripheral side,
A distance changing portion having a shape in which the distance from the rotation center to the outer periphery changes in the circumferential direction. A rotation fixing member fixed to the case;
It is a summary to provide.

  In the resolver device of the present invention, the distance changing portion has a shape in which the distance from the center of rotation to the outer periphery changes in the circumferential direction, and a part of the outer peripheral surface of the distance changing portion abuts against the recess of the resolver stator. A rotation fixing member that is fixed to the case in that state. At the time of manufacturing the resolver device, the resolver stator is attached to the case, the rotation fixing member is rotated, and a part of the outer peripheral surface of the distance changing portion is brought into contact with the recess of the resolver stator, and the rotation fixing member is fixed to the case in that state. To do. After that, when the resolver stator is removed from the case and attached again, the resolver stator is fixed to the case so that the concave portion of the resolver stator contacts the contact position with the concave portion at the time of manufacture in the distance changing portion. As a result, when the resolver stator is removed from the case and attached again, the work required for the initial installation (for example, the resolver stator is temporarily fixed (loosely fixed) to the case and then the rotating shaft of the motor is rotated to output the resolver output). Since it is not necessary to perform an operation of rotating the resolver stator with a jig and the like, the operation can be further simplified.

It is a block diagram which shows the outline of a structure of the motor unit 10 to which the resolver apparatus as one Example of this invention is applied. It is a part of side view which looked at the motor unit 10 of FIG. 1 from the right side. FIG. 4 is an external view showing the external appearance of bolts 41 and nuts 50 as positioning members 40. It is explanatory drawing which shows the mode around the distance change part 46 of the volt | bolt 41. FIG.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of a configuration of a motor unit 10 including a resolver device as one embodiment of the present invention, and FIG. 2 is a part of a side view of the motor unit 10 of FIG. 1 viewed from the right side. 3 is an external view showing the external appearance of the bolt 41 and the nut 50 as the positioning member 40, and FIG. 4 is an explanatory view showing the state around the distance changing portion 46 of the bolt 41. When the motor unit 10 of FIG. 1 is viewed from the right side, the resolver stator 34 cannot be visually recognized, but portions that do not overlap the bolts 41 and the nuts 50 are indicated by dotted lines.

  The motor unit 10 is mounted on an electric vehicle, a hybrid vehicle, or the like, and as shown in the figure, a motor 20 used for traveling, a resolver 30 as a rotational position detection sensor for detecting the rotational position of the motor 20, and the motor 20 or resolver. And a positioning member 40 used for positioning the resolver stator 34 when the resolver stator 34 of the resolver 30 is detached from the case 12 and attached again. The resolver device of the embodiment mainly corresponds to the resolver 30 and the positioning member 40.

  The case 12 includes a case body 13 and a rear cover 14. A hole 15 is formed in the rear cover 14. Further, the rear cover 14 is fixed to the case main body 13 with a bolt or the like (not shown).

  The motor 20 is configured as a well-known three-phase AC motor including a rotor 24 fixed to the rotary shaft 22 and a stator 26 around which a coil 28 is wound and fixed to the case body 13. The rotor 24 is configured by embedding a plurality of permanent magnets in a rotor core formed by laminating a plurality of electromagnetic steel plates. The stator 26 is configured by winding a coil 28 around a plurality of teeth of a stator core formed by laminating a plurality of electromagnetic steel plates.

  The resolver 30 includes a resolver rotor 32 fixed to the rotating shaft 22 of the motor 20, and a resolver stator 34 fixed to the rear cover 14 on the outer peripheral side of the resolver rotor 32. The resolver rotor 32 is configured by embedding a plurality of permanent magnets in a rotor core formed by laminating a plurality of electromagnetic steel plates. The resolver stator 34 is configured by winding a single-phase or more input coil or two-phase or more output coils having different electrical angles on a stator core formed by laminating a plurality of electromagnetic steel plates. As shown in FIG. 2, the resolver stator 34 has a plurality of recesses 35 formed on the outer peripheral side and a plurality of elongated holes 36 extending in the circumferential direction. The resolver stator 34 is attached to the rear cover 14 by screwing a bolt 38 inserted into the long hole 36 into an attachment hole (not shown) of the rear cover 14, and when the degree of screwing is shallow (light), the resolver stator 34 is rotated. It can be rotated in the direction. The resolver stator 34 is opposed to the resolver rotor 32 when the rear cover 14 is attached to the case body 13 (corresponding to the outer peripheral side and the inner peripheral side).

  The positioning member 40 includes a bolt 41 that is inserted into the hole 15 of the rear cover 14 and is rotatable with respect to the rear cover 14, and a nut 50 that prevents the bolt 41 from rotating with respect to the rear cover 14.

  The bolt 41 includes a threaded part 52 that can be threadedly engaged with the threaded part 52 formed on the inner peripheral side of the nut 50, a flange part 44 that is formed continuously with the threaded part 42, and a continuous part with the flange part 44. The shaft portion 45 is formed to extend in the axial direction, and the distance changing portion 46 is formed continuously from the shaft portion 45 so that the distance from the rotation center to the outer periphery changes in the circumferential direction. The screw portion 42 of the bolt 41 has an outer diameter slightly smaller than the inner diameter of the hole 15 of the rear cover 14 and has a length longer than the thickness of the rear cover 14. Therefore, when the bolt 41 is inserted into the hole 15 from the inner side of the rear cover 14 and the flange portion 44 comes into contact with the wall surface on the inner side of the rear cover 14 (left side in FIG. 1), a part of the screwing portion 42 is in the hole 15 of the rear cover 14. Projecting outward (right side in FIG. 1). In addition, a hole 43 (in the embodiment, a hexagonal bar spanner or the like into which a jig can be inserted is inserted into the end portion (the right end portion in FIGS. 1 and 3) of the bolt 41 on the screwing portion 42 side. A square hole) is formed. The length of the shaft portion 45 of the bolt 41 is such that when the bolt 41 is inserted into the hole 15 from the inside of the rear cover 14 and the flange portion 44 comes into contact with the inner wall surface of the rear cover 14, the distance changing portion 46 becomes the resolver stator. It is formed so as to be substantially concentric with the recess 35 of 34. The distance changing portion 46 is formed to be smaller than the concave portion 35 of the resolver stator 34, and a part of the outer peripheral surface comes into contact with the concave portion 35 during rotation (when the bolt 41 rotates). In addition, this distance change part 46 is formed in the ellipse shape eccentric with respect to the axial part 45 (rotation center) in the example of FIG.

  The positioning member 40 includes a flange portion 44 and a nut 50 so that the bolt 41 does not rotate with respect to the rear cover 14 with a part of the screw portion 42 of the bolt 41 protruding outward from the hole 15 of the rear cover 14. So that the rear cover 14 is strongly pressed by the screw 41 so that the screw 42 of the bolt 41 and the screw 52 of the nut 50 are screwed together (hereinafter referred to as a strong screw), or the bolt 41 can rotate with respect to the rear cover 14. The threaded portion 42 of the bolt 41 and the threaded portion 52 of the nut 50 are threaded together (hereinafter referred to as weak threading) to such an extent (the extent that the rear cover 14 is not pressed or lightly pressed by the flange portion 44 and the nut 50). You can make it.

  In the motor unit 10 configured in this manner, when the resolver 30 is attached for the first time (when the resolver device is manufactured), first, the resolver rotor 32 is attached to the rotary shaft 22. Further, the resolver stator 34 is arranged so that the concave portion 35 of the resolver stator 34 and the hole 15 of the rear cover 14 are aligned in the axial direction (see FIG. 1), and the bolt 38 is inserted into the long hole 36 of the resolver stator 34 (FIG. 2). (Refer to FIG. 1) A mounting hole (not shown) of the rear cover 14 is shallowly (lightly) screwed and a bolt 41 of the positioning member 40 is inserted into the hole 15 of the rear cover 14 from the left side of FIG. While being brought into contact with the inner wall surface, the screwing portion 42 of the bolt 41 and the screwing portion 52 of the nut 50 are weakly screwed together. Then, the rear cover 14 is attached to the case body 13. Thereby, the resolver 30 can output the signal according to the rotational position of the rotating shaft 22 (resolver rotor 32), with the resolver rotor 32 and the resolver stator 34 facing each other on the inner peripheral side and the outer peripheral side. In this state, the bolt 41 is rotatable with respect to the rear cover 14. Then, the rotor 24 (rotating shaft 22) of the motor 20 is rotated to confirm the output of the resolver 30 and the resolver stator 34 is slightly rotated (for example, the current at which the rotational position of the rotating shaft 22 flows in a predetermined phase of the motor 20). The resolver stator 34 is rotated so that the resolver 30 outputs a signal corresponding to the zero point when the rotation position is the maximum in the electrical cycle. Point adjustment is performed (hereinafter referred to as confirmation zero point adjustment work). Normally, the amount of rotation of the resolver stator 34 in this confirmation zero point adjustment operation is not so large. When the zero point adjustment of the resolver stator 34 is completed in this way, the rear cover 14 is removed from the case body 13 if necessary, and the resolver stator 34 is removed by screwing the bolt 38 deeply into the mounting hole of the rear cover 14 using a jig. Fix the rear cover 14 so as not to rotate. When the rear cover 14 is removed from the case main body 13, the rear cover 14 is reattached, and a jig is inserted into the hole 43 of the bolt 41 to rotate the bolt 41 (clockwise in the example of FIG. 4). A part of the outer peripheral surface of the changing portion 46 is brought into contact with the concave portion 35 of the resolver stator 34, and in this state, the screw portion 42 of the bolt 41 and the screw portion 52 of the nut 50 are strongly screwed together. Thereby, the bolt 41 does not rotate with respect to the rear cover 14. Hereinafter, the contact position of the distance changing portion 46 in this state with the recess 35 is referred to as a manufacturing contact position.

  Thereafter, when the resolver stator 34 of the resolver 30 is removed from the rear cover 14 and reattached, such as when the motor unit 10 is disassembled and reassembled, the recess 35 (the same recess 35 as at the time of manufacture) of the resolver stator 34 The resolver stator 34 is rotated so as to come into contact with the manufacturing contact position in the distance changing portion 46 (in the example of FIG. 4, it is rotated counterclockwise), and the concave portion 35 is in contact with the distance changing portion 46 (FIG. 4). In this state, the resolver stator 34 is fixed by bolts 38 so as not to rotate with respect to the rear cover 14. Therefore, there is no need to perform the confirmation zero point adjustment work as in manufacturing. Thereby, the operation | work when removing the resolver stator 34 from the rear cover 14 and reattaching can be simplified more.

  According to the resolver device of the embodiment described above, the bolt 41 that is fixed to the rear cover 14 by the nut 50 in that state when a part of the outer peripheral surface of the distance changing portion 46 comes into contact with the recess 35 of the resolver stator 34. Prepare. Therefore, at the time of manufacturing the resolver device, the resolver stator 34 is attached to the rear cover 14, the bolt 41 is rotated, and a part of the outer peripheral surface of the distance changing portion 46 is brought into contact with the recess 35 of the resolver stator 34. When the resolver stator 34 is removed from the rear cover 14 and attached again after the 41 is fixed to the rear cover 14 with the nut 50, the recess 35 of the resolver stator 34 is in contact with the recess 35 at the time of manufacture in the distance changing portion 46 of the bolt 41. By fixing the resolver stator 34 to the rear cover 14 so as to come into contact with the contact position, it is possible to further simplify the work when the resolver stator 34 is detached from the rear cover 14 and attached again.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the resolver rotor 32 corresponds to a “resolver rotor”, the resolver stator 34 corresponds to a “resolver stator”, the resolver 30 corresponds to a “resolver”, and the bolt 41 corresponds to a “rotation fixing member”.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  INDUSTRIAL APPLICABILITY The present invention can be used in the manufacturing industry of resolver devices including a resolver.

  10 motor unit, 12 case, 13 case body, 14 rear cover, 15 holes, 20 motor, 22 rotating shaft, 24 rotor, 26 stator, 28 coil, 30 resolver, 32 resolver rotor, 34 resolver stator, 35 recess, 36 long hole , 38 bolt, 40 positioning member, 41 bolt, 42 screwing part, 43 hole, 44 flange part, 45 shaft part, 46 distance changing part, 50 nut, 52 screwing part.

Claims (1)

A resolver device comprising a resolver having a resolver rotor attached to a rotating shaft of a motor and a resolver stator attached to a case with a recess formed on the outer peripheral side,
A distance changing portion having a shape in which the distance from the rotation center to the outer periphery changes in the circumferential direction. A rotation fixing member fixed to the case;
Equipped with a,
The resolver stator is detachable from the case in a state where the rotation fixing member is fixed to the case.
Resolver device.

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