JP2006349549A - Coil end inspection device of stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil end inspection device which accurately and easily inspects the maximum outer shape on design of a coil end even if the height directional allowable dimension of the coil end is changed in the circumferential direction of a stator core with a circumferential shape of a motor, easily inspects the maximum outer shape on design even for a gradually changing part in which the height directional allowable dimension is gradually changed, and copes with miniaturization of the motor. <P>SOLUTION: The coil end inspection device for visually inspecting failure of the coil end 21 of a winding 11 wound on the stator core 12 with circumferential shape of the motor, to which a height directional allowable dimension changed for each circumferential part is assigned, comprises: a plate-like gauge 31 having an inner surface 31a formed with a predetermined gap from the maximum outer shape on design of the coil end 21; and an inspection part sliding mechanism sliding the plate-like gauge 31 in the height direction in conformation to the height directional allowable dimension. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an apparatus for inspecting the outer shape of a coil end of a winding wound around a stator core in a stator of a motor.

  The motor is formed by covering a stator having a winding around a stator core with a case. At this time, in order to insulate the coil end of the winding from the case, it is necessary to secure a distance necessary for insulation between the coil end of the winding and the case. On the other hand, the shape of the case is not uniform due to restrictions on mounting on the vehicle, and there are irregularities, and in order to reduce damage due to livelihood more than necessary, the outer shape of the coil end of the winding should correspond to the shape of the case It is necessary to mold it. Therefore, as an example, FIGS. 1 and 2 show an outline of the outer shape of the coil end of the winding formed so as to correspond to the shape of the case.

  FIG. 1 shows a top view of the stator 10. FIG. 2 shows a developed sectional view of the allowable dimension in the height direction of the coil end 21 of the winding 11 wound around the stator core 12. As shown in FIGS. 1 and 2, the allowable dimension in the height direction of the coil end 21 is different for each part in the circumferential direction. Specifically, the cross-sectional shape of the coil end 21 includes a first shape portion 21a, a second shape portion 21b, a third shape portion 21c, and a gradual change portion 21d over the circumferential direction.

  The allowable dimension of the coil end 21 of the winding 11 is defined as shown in FIG. Specifically, the height allowable dimension H is defined with reference to the end surface 12a of the stator core 12 in the height direction. Further, an inner diameter allowable dimension R1 and an outer diameter allowable dimension R2 are defined with respect to the central axis 12b of the stator core 12 in the radial direction.

  Therefore, conventionally, the following method is used to inspect the outer shape of the coil end 21 of the stator 10. FIG. 13 shows an external view of a plate gauge 131 used in a conventional inspection method (inspection of the first shape portion 21a). FIG. 14 is a schematic diagram of a conventional inspection method (inspection of the first shape portion 21a) performed using the plate gauge 131 shown in FIG. FIG. 15 shows an external view of a plate gauge 132 used in a conventional inspection method (inspection of the second shape portion 21b). FIG. 16 is a schematic diagram of a conventional inspection method (inspection of the second shape portion 21b) performed using the plate gauge 132 shown in FIG.

  In addition, there is a plate gauge used for the inspection of the third shape portion 21c, but the height direction with respect to the plate gauges (131, 132) used for the inspection of the first shape portion 21a and the second shape portion 21b. Since only the dimensions of are different, the description is omitted. For the same reason, the description of the inspection method in the third shape portion 21c is also omitted. Therefore, here, the inspection in the first shape portion 21a and the inspection in the second shape portion will be described.

  As shown in FIGS. 13 and 15, the plate gauges (131, 132) used in the conventional inspection method are different from the plate gauges (131, 132) in the height allowable dimension H, the inner diameter allowable dimension R 1, and the outside. It has the inner surface (131a, 132a) which consists of a shape which prescribes | regulates the diameter tolerance dimension R2. As shown in FIGS. 13 and 15, core end surface reference portions (131 b and 132 b) are formed at the lower portion of the plate gauge so that the end surface 12 a of the stator core 12 can be defined as a reference surface. . Both the plate gauge 131 and the plate gauge 132 have the same shape that defines the inner diameter allowable dimension R1 and the outer diameter allowable dimension R2. However, in order to correspond to the height allowable dimension H of the first shape portion 21a and the second shape portion 21b of the coil end 21, the dimensions in the height direction are different, and the shapes defining the height allowable dimension H are different. .

  Then, as shown in FIGS. 14 and 16, plate gauges (131, 132) are covered so as to cover the first shape portion 21a and the second shape portion 21b of the coil end 21, and the core end surface reference portion (131b, 132b) is aligned with the end face 12a of the stator core 12. In this state, it is visually confirmed whether the inner surfaces (131a, 132a) of the plate gauges (131, 132) are in contact with the outer shapes of the first shape portion 21a and the second shape portion 21b of the coil end 21. When the inner surfaces (131a, 132a) of the plate gauges (131, 132) do not contact the outer shapes of the first shape portion 21a and the second shape portion 21b of the coil end 21, the first shape portion of the coil end 21 is used. The external shape of 21a and the 2nd shape part 21b is judged as a good product. On the other hand, when the inner surfaces (131a, 132a) of the plate gauges (131, 132) and the outer shapes of the first shape portion 21a and the second shape portion 21b of the coil end 21 are in contact, the first shape portion of the coil end 21 is used. The external shape of 21a and the 2nd shape part 21b is judged as inferior goods. Thereby, it is assumed that a good product and a defective product of the outer shape of the first shape portion 21a and the second shape portion 21b of the coil end 21 can be easily inspected visually.

In addition, there are inventions described in the following patent documents as conventional techniques.
First, the electric motor of Patent Document 1 (hereinafter referred to as the motor 201) will be described. FIG. 17 is an external perspective view of the motor 201. FIG. 18 shows a cross-sectional view of the motor 201.

  As shown in FIG. 18, the motor 201 includes a winding frame 215, a winding 211, a stator core 212, a case 216, and the like. The reel 215 includes an inner wall 221 and an outer wall 222. Further, the inner wall 221 includes a stepped portion 223. The upper end portion of the step portion 223 is in contact with the case 216.

  The motor 201 having such a configuration winds the winding 211 around the stator core 212 via the winding frame 215. At this time, the coil end shape of the winding 211 is regulated by the winding frame 215. When the winding 211 does not cover the step 223 provided on the inner wall 221, it is assumed that the distance between the case 216 contacting the upper end of the inner wall 221 and the winding 211 can be visually confirmed. For this reason, the distance between the case 216 and the winding 211 necessary for insulation can be visually confirmed without using a measuring component.

  Next, the height gauge 301 of Patent Document 2 will be described. FIG. 19 shows a side view of the height gauge 301. As shown in FIG. 19, the height gauge 301 includes a base 311, a scale 312, a slider 313, an arm 314, a clamp 315, a holder 316, a measuring needle 317, and the like.

In the height gauge 301 having such a configuration, when measuring the height dimension of the upper surface 322 of the member 321 of the device fixed on the main body, the base 311 of the height gauge 301 is placed on the main body, and the holder The measurement needle 317 is fixed at a position rotated with respect to 316 and the measurement surface of the measurement needle 317 is brought into contact with the upper surface 322 of the member 321 to perform measurement.
JP 11-041850 (paragraphs 0010 and 0011, FIGS. 1 and 2) JP-A-11-118405 (paragraphs 0008-0010, FIG. 1)

  However, the conventional inspection method for the outer shape of the coil end 21 requires a dedicated plate gauge for each of the first shape portion 21a, the second shape portion 21b, the third shape portion 21c, and the gradual change portion 21d. End up. In particular, since the dimension in the height direction gradually changes as it progresses in the circumferential direction at the gradually changing portion 21d, a plate gauge for each changing dimension is required. Therefore, the number of plate gauges becomes very large, and the inspection burden increases. In the first place, since the inspection point by the plate gauge is not uniquely determined in the gradual change portion 21d, the outer shape of the coil end 21 cannot be accurately inspected.

  With respect to Patent Document 1, the motor 201 uses the reel 215 as an essential component. However, the reel 215 itself does not directly contribute to the performance of the motor 201. Nevertheless, as shown in FIG. 17, the inner wall 221 and the outer wall 222 of the winding frame 215 protrude greatly from the end surface of the stator core 212, and the motor 201 becomes larger in the height direction and becomes larger.

  In Patent Document 2, as shown in FIG. 19, the slider 313 is positioned by a set screw 323. Therefore, when the slider 313 is moved up and down along the scale 312, it is necessary to remove the set screw 323 from the slider 313. Accordingly, as described above, the gradual change portion 21d cannot be accurately inspected.

Then, this invention aims at the following.
(1) Regarding the circumferential direction of the circumferential stator core of the motor, even if the allowable dimension in the height direction of the coil end changes, the maximum outer shape of the coil end design should be inspected accurately and easily. An object of the present invention is to provide a coil end inspection device capable of performing the above.
(2) An object of the present invention is to provide a coil end inspection device capable of easily inspecting the designed maximum outer shape even in a gradually changing portion where the allowable dimension in the height direction gradually changes in the circumferential direction.
(3) An object of the present invention is to provide a coil end inspection device that can cope with the miniaturization of a motor.

In order to achieve the object (1), the present invention has the following features.
(1) According to the present invention, a coil end defect is visually observed with respect to a coil end of a winding that is wound around a circumferential stator core of a motor and is given an allowable dimension in the height direction that varies for each circumferential portion. In a coil end inspection device to be inspected, an inspection component having an inner surface formed with a predetermined outer shape and a predetermined interval between the design of the coil end, and the inspection component is slid in a height direction corresponding to an allowable dimension in the height direction. And an inspection part slide mechanism.

(2) In the coil end inspection apparatus according to (1), the present invention includes a height reference ring having a height direction dimension that changes for each portion in the circumferential direction corresponding to the allowable dimension in the height direction. The inspection component slide mechanism is characterized in that the inspection component is slid in accordance with the dimension in the height direction of the height reference ring.

(3) In the coil end inspection apparatus according to (1) or (2), the present invention is characterized in that a gradually changing portion that gradually changes in the circumferential direction exists in the allowable dimension in the height direction. And

(4) The present invention provides the coil end inspection device according to (2) or (3), wherein the inspection component slide mechanism contacts the first end surface of the height reference ring to position the inspection component in the height direction. It is characterized by comprising a reference gauge for performing.

(5) In the coil end inspection device according to any one of (2) to (4), the present invention provides a phase positioning groove for positioning the phase with the stator core on the second end surface of the height reference ring. It is characterized by providing.

(6) A coil end that is wound around a circumferential stator core of a motor and is visually inspected for defects in the coil end of a winding that is given an allowable dimension in the height direction that changes for each circumferential portion. In the inspection method, an inspection part having an inner surface formed with a predetermined maximum interval and a predetermined interval is used, and the inspection part is slid in the height direction corresponding to the allowable dimension in the height direction. It is characterized by having.

The present invention having such features can obtain the following operations and effects.
(1) According to the present invention, a coil end defect is visually observed with respect to a coil end of a winding that is wound around a circumferential stator core of a motor and is given an allowable dimension in the height direction that varies for each circumferential portion. In a coil end inspection device to be inspected, an inspection component having an inner surface formed with a predetermined outer shape and a predetermined interval between the design of the coil end, and the inspection component is slid in a height direction corresponding to an allowable dimension in the height direction. Because it has an inspection part slide mechanism, the maximum in the coil end design can be accurately and easily achieved even when the allowable dimension in the height direction of the coil end changes in the circumferential direction of the circumferential stator core of the motor. It is possible to provide a coil end inspection apparatus that can easily inspect the outer shape and can cope with downsizing of the motor.

(2) In the coil end inspection apparatus according to (1), the present invention includes a height reference ring having a height direction dimension that changes for each portion in the circumferential direction corresponding to the allowable dimension in the height direction. Since the inspection part slide mechanism slides the inspection part corresponding to the height direction dimension of the height reference ring, in addition to the effect described in (1), the inspection part slide mechanism is formed on the height reference ring. Because the inspection component slide mechanism slides the inspection component along the outer shape, even if the allowable dimension in the coil end height direction changes, the maximum outer shape of the coil end design is more accurate and easy. Can be easily inspected.

(3) In the coil end inspection apparatus described in (1) or (2), the present invention is a case where the allowable dimension in the height direction includes a gradually changing portion that gradually changes in the circumferential direction. However, in addition to the effect described in (1) or (2), the design maximum outer shape of the coil end can be easily inspected.

(4) The present invention provides the coil end inspection device according to (2) or (3), wherein the inspection component slide mechanism contacts the first end surface of the height reference ring to position the inspection component in the height direction. Since the reference gauge is provided, in addition to the effect described in (2) or (3), the inspection part slide mechanism slides the inspection part along the outer shape of the first end face of the height reference ring more accurately and easily. Therefore, even when the allowable dimension of the coil end in the height direction changes, the maximum design outer shape of the coil end can be inspected more accurately and easily, and the height direction gradually increases in the circumferential direction. Even in the gradual change portion of the coil end where the allowable dimension changes, the designed maximum outer shape can be inspected more accurately and easily.

(5) In the coil end inspection device according to any one of (2) to (4), the present invention provides a phase positioning groove for positioning the phase with the stator core on the second end surface of the height reference ring. In addition to the effects described in (2) to (4), since the phase positioning of the height reference ring and the stator core is accurately performed, the allowable dimension in the height direction of the coil end changes. Even in such a case, the design maximum outer shape of the coil end can be inspected more accurately and easily, and even in the gradually changing portion of the coil end where the allowable dimension in the height direction gradually changes in the circumferential direction. The maximum outer shape can be inspected more accurately and easily.

(6) A coil end that is wound around a circumferential stator core of a motor and is visually inspected for defects in the coil end of a winding that is given an allowable dimension in the height direction that changes for each circumferential portion. In the inspection method, an inspection part having an inner surface formed with a predetermined maximum interval and a predetermined interval is used, and the inspection part is slid in the height direction corresponding to the allowable dimension in the height direction. Therefore, even if the allowable dimension in the coil end height direction changes with respect to the circumferential direction of the circumferential stator core of the motor, the maximum outer shape of the coil end design can be easily and accurately determined. Thus, it is possible to provide a coil end inspection method that can cope with downsizing of the motor.

  Examples of the present invention will be described below. FIG. 4 is a schematic diagram of the coil end inspection apparatus 1 of the present invention. In addition, the state which test | inspects the 1st shape part 21a is shown. FIG. 5 is a schematic diagram of the coil end inspection apparatus 1 of the present invention. In addition, the state which test | inspects the 2nd shape part 21b is shown.

<Configuration of coil end inspection apparatus of the present invention>
As shown in FIGS. 4 and 5, the coil end inspection apparatus 1 includes a plate gauge 31 as an inspection component, a base 33, a support 34, an arm 35, a reference gauge 36, a height reference ring 37, and the like. . And the base 33 is inserted in the inner peripheral side of the stator core 12, and the support | pillar 34 integral with the base 33 is maintained in the perpendicular | vertical state. A winding 11 is wound around the stator core 12 and a coil end 21 as shown in FIGS. 4 and 5 is formed. The plate gauge 31 includes an inner surface 31a formed with a predetermined distance from the designed maximum outer shape of the coil end 21.

  FIG. 6 is a view showing how the plate gauge 31, the arm 35, and the reference gauge 36 slide up and down. Since the arm 35 is attached to the column 34 with a linear bush or the like, it can be slid up and down in this way. For convenience of explanation, although not shown in FIGS. 4 to 6, a roller 36 a composed of two wheels is provided at the lower end of the reference gauge 36 as shown in FIGS. 10 to 12 described later. .

  FIG. 7 is an external perspective view of the surface of the height reference ring 37. As shown in FIG. 7, on the surface of the height reference ring 37, a first shape portion 37a, a second shape portion 37b, a third shape portion 37c, and a gradual change portion 37d are formed. Here, the gradually changing portion 37d formed on the surface of the height reference ring 37 is a portion where the height direction dimension of the height reference ring 37 gradually changes in the circumferential direction. In order to correspond to the shape of the gradual change portion 21d of the coil end 21, the inclination of the gradual change portion 37d formed on the surface of the height reference ring 37 and the inclination of the gradual change portion 21d of the coil end 21 are made equal. Yes. Further, the height dimension of the first shape portion 37a, the second shape portion 37b, and the third shape portion 37c formed on the surface of the height reference ring 37 is the coil as shown in FIG. 1 and FIG. The first shape portion 21a, the second shape portion 21b, and the third shape portion 21c of the end 21 correspond to the allowable dimensions in the height direction.

  FIG. 8 is an external perspective view of the back surface of the height reference ring 37. As shown in FIG. 8, phase positioning grooves 41 are formed at three locations on the back surface of the height reference ring 37. The phase positioning groove 41 is used to determine the phase between the height reference ring 37 and the stator core 12 when the height reference ring 37 is attached to the stator core 12.

  Here, FIG. 9 shows a top view of the stator core 12. As shown in FIG. 9, bolt holes 42 are formed in the stator core 12 at three locations in the circumferential direction so as to protrude slightly from the outer periphery of the stator core 12. The phase positioning groove 41 is formed in such a shape that the bolt hole 42 can be fitted. Further, the bolt hole portion 42 and the phase positioning groove 41 of the height reference ring 37 are formed in common phase. Therefore, when the height reference ring 37 is attached to the stator core 12, the bolt hole portion 42 is fitted into the phase positioning groove 41 while matching the phases of the phase positioning groove 41 and the bolt hole portion 42. Thus, the height reference ring 37 can be attached to the stator core 12 in a state where the stator core 12 and the height reference ring 37 are in phase.

  Further, on the outer periphery of the stator core 12, in addition to the bolt hole portion 42, as shown in FIG. 9, six uneven portions 43 are formed in the circumferential direction. Therefore, a convex recess (not shown) that can be fitted to the shape of the concavo-convex portion 43 in the same phase portion as the concavo-convex portion 43 may be provided on the inner peripheral surface of the height reference ring 37. Thereby, the height reference ring 37 can be attached to the stator core 12 in a state where the phases of the stator core 12 and the height reference ring 37 are more in phase.

<Operation of the coil end inspection device of the present invention>
The coil end inspection apparatus 1 having such a configuration visually inspects the presence or absence of a defect in the coil end 21 over the entire circumference from the first shape portion 21a to the second shape portion 21b, the third shape portion 21c, and the gradually changing portion 21d. In this case, the following is performed.
First, as shown in FIG. 4, the outer shape of the first shape portion 21a of the coil end 21 is inspected. Specifically, the arm 35 is rotated around the column 34 to align the position of the plate gauge 31 with the first shape portion 21 a of the coil end 21. Then, as shown in FIG. 6, the plate gauge 31, the arm 35, and the reference gauge 36 are slid from the top to the bottom. Then, the roller 36 a provided at the lower end of the reference gauge 36 comes into contact with the surface of the height reference ring 37. Thereby, the downward sliding of the plate gauge 31, the arm 35, and the reference gauge 36 is restricted. Further, the position of the plate gauge 31 and the arm 35 in the height direction can be maintained in a state corresponding to the height dimension of the height reference ring 37.

  At this time, the position of the plate gauge 31 is determined at a position suitable for the inspection of the outer shape of the first shape portion 21a of the coil end 21. Specifically, as shown in FIG. 4, the dimension δ in the predetermined height direction from the surface of the height reference ring 37 with respect to the dimension A in the height direction from the end face 12 a of the stator core 12 by the height reference ring 37. The inner surface 31a of the plate gauge 31 is located at the position where the two are stacked. In this state, it is visually confirmed whether or not the inner surface 31a of the plate gauge 31 and the outer shape of the first shape portion 21a of the coil end 21 are in contact with each other. When the inner surface 31a of the plate gauge 31 and the outer shape of the first shape portion 21a of the coil end 21 do not contact each other, the outer shape of the first shape portion 21a of the coil end 21 is determined as a non-defective product. On the other hand, when the inner surface 31a of the plate gauge 31 and the outer shape of the first shape portion 21a of the coil end 21 are in contact, the outer shape of the first shape portion 21a of the coil end 21 is determined as a defective product. Thereby, a good product and a defective product can be easily inspected visually with respect to the outer shape of the first shape portion 21a of the coil end 21.

  Then, while rotating the arm 35 around the support column 34, as shown in FIG. 10, the roller 36 a of the reference gauge 36 attached to the tip of the arm 35 is rolled on the surface of the height reference ring 37 and moved. Whether or not the inner surface 31a of the plate gauge 31 and the outer shape of the first shape portion 21a of the coil end 21 are in contact with each other over the circumferential direction of the first shape portion 21a of the coil end 21 while moving in this way. Confirm and inspect.

  As described above, the phase of the height reference ring 37 and the stator core 12 is matched by fitting the bolt hole portion 42 into the phase positioning groove 41. Therefore, even if the roller 36a of the reference gauge 36 attached to the tip of the arm 35 is moved by rolling on the surface of the height reference ring 37, the phase of the height reference ring 37 and the stator core 12 may be shifted. There is no. Accordingly, it is possible to accurately inspect the outer shape of the first shape portion 21a of the coil end 21.

  As shown in FIG. 4, the dimension A in the height direction of the first shape portion 37a of the height reference ring 37 and the distance δ from the surface of the height reference ring 37 to the inner surface 31a of the plate gauge 31 are as follows: The value corresponds to the allowable dimension in the height direction of the outer shape of the first shape portion 21a of the end 21.

  Further, the arm 35 is rotated, and the roller 36a of the reference gauge 36 is rolled and moved on the surface of the first shape portion 37a of the height reference ring 37. Then, the coil end 21 moves from the first shape portion 21a to the second shape portion 21b. Here, a step portion exists at the boundary between the first shape portion 21a and the second shape portion 21b. And the level | step difference which consists of the dimension of the same height direction as this level | step difference exists also in the surface of the height reference ring 37 in the boundary of the 1st shape part 37a and the 2nd shape part 37b (refer FIG. 11).

  In the present invention, the arm 35 attached to the column 34 with a linear bush or the like can be slid up and down. Therefore, the arm 35 is slid upward in accordance with the shape of the stepped portion, and the roller 36a of the reference gauge 36 attached to the tip of the arm 35 is moved to the second shape portion 37b on the surface of the height reference ring 37. Move.

  Also in the second shape portion 21b, as in the first shape portion 21a, the roller 36a of the reference gauge 36 attached to the tip of the arm 35 by rotating the arm 35 is attached to the surface of the height reference ring 37. The second shape portion 37b is rolled and moved. Thereby, it can test | inspect while visually confirming whether the inner surface 31a of the plate-shaped gauge 31 and the external shape of the 2nd shape part 21b of the coil end 21 contact visually.

  As shown in FIG. 5, the dimension B in the height direction of the second shape portion 37b of the height reference ring 37 and the distance δ from the surface of the height reference ring 37 to the inner surface 31a of the plate gauge 31 are as follows: The value corresponds to the allowable dimension in the height direction of the outer shape of the second shape portion 21b of the end 21.

  Further, the arm 35 is rotated, and the roller 36 a of the reference gauge 36 is rolled and moved on the surface of the second shape portion 37 b of the height reference ring 37. Then, the coil end 21 moves from the second shape portion 21b to the third shape portion 21c. Here, a step portion also exists at the boundary between the second shape portion 21b and the third shape portion 21c. A step having the same height dimension as the step is present on the surface of the height reference ring 37 at the boundary between the second shape portion 37b and the third shape portion 37c.

  In the present invention, the arm 35 attached to the column 34 with a linear bush or the like can be slid up and down. Therefore, the arm 35 is slid downward according to the shape of the stepped portion, and the roller 36a of the reference gauge 36 attached to the tip of the arm 35 is moved to the third shape portion 37c on the surface of the height reference ring 37. Move.

  Also in the third shape portion 21c, as in the case of the first shape portion 21a and the second shape portion 21b, the roller 36a of the reference gauge 36 that is attached to the tip portion of the arm 35 by rotating the arm 35 is made higher. It is rolled by the third shape portion 37c on the surface of the reference ring 37 and moved. Thereby, it can test | inspect while visually confirming whether the inner surface 31a of the plate-shaped gauge 31 and the external shape of the 3rd shape part 21c of the coil end 21 contact visually.

  Further, the arm 35 is rotated, and the roller 36 a of the reference gauge 36 is rolled and moved on the surface of the third shape portion 37 c of the height reference ring 37. Then, the coil end 21 moves from the third shape portion 21c to the gradually changing portion 21d. A gradual change portion 37d is also present on the surface of the height reference ring 37 (see FIG. 7).

  In the present invention, the arm 35 attached to the column 34 with a linear bush or the like can be slid up and down. Therefore, the arm 35 is slid downward according to the shape of the gradually changing portion 37d, and the roller 36a of the reference gauge 36 attached to the tip of the arm 35 is moved to the gradually changing portion 37d on the surface of the height reference ring 37. Move.

  Also in the gradually changing portion 21d, the reference gauge 36 attached to the tip of the arm 35 by rotating the arm 35 as in the first shape portion 21a, the second shape portion 21b, and the third shape portion 21c. The roller 36a is rolled and moved by a gradual change portion 37d on the surface of the height reference ring 37. Here, the dimension in the height direction of the gradually changing portion 37 d on the surface of the height reference ring 37 is set corresponding to the allowable dimension in the height direction of the gradually changing portion 21 d of the coil end 21. Therefore, the inspection is performed while continuously confirming whether the inner surface 31a of the plate gauge 31 is in contact with the outer shape of the gradually changing portion 21d of the coil end 21 while moving as shown in FIG. Can do.

  Thus, even the gradually changing portion 21d of the coil end 21 whose allowable dimension in the height direction gradually changes in the circumferential direction can be inspected continuously visually while rotating the arm 35. Therefore, it is possible to easily and accurately inspect the outer shape of the gradually changing portion 21d of the coil end 21 that could not be inspected accurately by the conventional inspection method.

  Further, the arm 35 is rotated, and the roller 36a of the reference gauge 36 is rolled and moved on the surface of the gradually changing portion 37d of the height reference ring 37. Then, the coil end 21 moves from the gradually changing portion 21d to the first shape portion 21a. Thereby, the external shape of the coil end 21 can be inspected continuously over the circumferential direction.

  As described above, it is possible to easily inspect the outer shape of the coil end 21 by inspecting multiple cross sections with one plate gauge.

<Effect of the coil end inspection device of the present invention>
According to the embodiment as described above, the following effects can be obtained.
(1) The present invention relates to a coil end 21 of a winding 11 that is wound around a circumferential stator core 12 of a motor and is provided with an allowable dimension in the height direction that varies for each circumferential portion. In a coil end inspection device for visually inspecting for defects, a plate gauge 31 having an inner surface 31a formed at a predetermined distance from a design maximum outer shape of the coil end 21 and a plate corresponding to an allowable dimension in the height direction. Even if the allowable dimension in the height direction of the coil end 21 changes in the circumferential direction of the circumferential stator core 12 of the motor. A coil end inspection device that can easily and accurately inspect the maximum design outer shape of the coil end 21 accurately and easily, and can cope with downsizing of the motor. It is possible to provide.

(2) In the coil end inspection apparatus according to (1), the present invention provides a height reference ring 37 having a height direction dimension that changes for each circumferential region corresponding to the height direction allowable dimension. Since the inspection part slide mechanism slides the plate gauge 31 corresponding to the height direction dimension of the height reference ring 37, in addition to the effect described in (1), the height reference Since the inspection part slide mechanism slides the plate gauge 31 along the outer shape formed on the ring 37, even when the allowable dimension of the coil end 21 in the height direction changes, it is more accurate and easy. The maximum design outer shape of the coil end 21 can be easily inspected.

(3) In the coil end inspection apparatus described in (1) or (2), the present invention is a case where the allowable dimension in the height direction includes a gradually changing portion 21d that gradually changes in the circumferential direction. Even if it exists, in addition to the effect described in (1) or (2), the design maximum outer shape of the coil end 21 can be easily inspected.

(4) The present invention is the coil end inspection device according to (2) or (3), wherein the inspection component slide mechanism is brought into contact with the surface of the height reference ring 37 to position the plate gauge 31 in the height direction. In addition to the effect described in (2) or (3), the inspection part slide mechanism is more accurately and easily arranged along the outer shape of the surface of the height reference ring 37 in addition to the effect described in (2) or (3). Therefore, even when the allowable dimension in the height direction of the coil end 21 changes, the design maximum outer shape of the coil end 21 can be more accurately and easily inspected, and the circumferential direction is increased. Even in the gradual change portion 21d of the coil end 21 in which the allowable dimension in the height direction gradually changes, the design maximum outer shape can be inspected more accurately and easily.

(5) According to the present invention, in any one of the coil end inspection devices described in (2) to (4), the phase positioning with the stator core 12 is performed on the second end surface of the height reference ring 37. Since the groove 41 is provided, in addition to the effects described in (2) to (4), the phase of the height reference ring 37 and the stator core 12 is accurately positioned. Even when the dimensions change, the design maximum outer shape of the coil end 21 can be inspected more accurately and easily, and the allowable dimension in the height direction gradually changes in the circumferential direction. Also in the gradual change part 21d, the design maximum outer shape can be inspected more accurately and easily.

(6) Regarding the coil end 21 of the winding 11 that is wound around the circumferential stator core 12 of the motor and is given an allowable dimension in the height direction that changes for each circumferential portion, the defect of the coil end 21 is visually observed. In the coil end inspection method to be inspected, a plate-like gauge 31 having an inner surface 31a formed with a predetermined distance from a design maximum outer shape of the coil end 21 is used, corresponding to the allowable dimension in the height direction. Since the plate gauge 31 is slid in the height direction, even if the allowable dimension in the height direction of the coil end 21 changes in the circumferential direction of the circumferential stator core 12 of the motor accurately and Provided is a coil end inspection method capable of easily inspecting the design maximum outer shape of the coil end 21 and corresponding to miniaturization of the motor. Door can be.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning.

It is a top view of the stator by which the coil | winding was wound by the stator core. It is an expanded view of the cross section of the height direction of a coil end. It is a schematic diagram of the allowable dimension of a coil end. It is a schematic diagram of the coil end test | inspection apparatus of this invention (The state which test | inspects a 1st shape part is shown.). It is a schematic diagram of the coil end test | inspection apparatus of this invention (The state which test | inspects a 2nd shape part is shown.). It is the figure which showed a mode that a plate-shaped gauge, an arm, and a reference gauge slide. It is an external appearance perspective view of the surface of a height reference ring. It is an external appearance perspective view of the back surface of a height reference ring. It is a top view of a stator core. It is a figure which shows the state which the roller in the lower end of a reference | standard gauge moves, rolling the surface (a 1st shape part or a 2nd shape part, or a 3rd shape part) of a height reference ring. It is a figure which shows the state which the roller in the lower end of a reference | standard gauge moves, rolling the surface (step part) of a height reference | standard ring. It is a figure which shows the state which the roller in the lower end of a reference | standard gauge moves, rolling the surface (gradual change part) of a height reference | standard ring. It is an external view of the plate-shaped gauge used for the conventional inspection method (inspection of a 1st shape part). It is a schematic diagram of the conventional inspection method (inspection of a 1st shape part). It is an external view of the plate gauge used for the conventional inspection method (inspection of a 2nd shape part). It is a schematic diagram of the conventional inspection method (inspection of a 2nd shape part). 1 is an external perspective view of a stator in which a winding is wound around a stator core in Patent Document 1. FIG. 2 is a cross-sectional view of a motor of Patent Document 1. FIG. It is an external appearance side view of the height gauge of patent documents 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil end inspection apparatus 11 Winding 12 Stator core 21 Coil end 31 Plate gauge 35 Arm 36 Reference gauge 37 Height reference ring 41 Phase positioning groove 42 Bolt hole H Coil end height tolerance R1 Coil end tolerance R2 Coil end outer diameter tolerance

Claims (6)

Coil end inspection device for visually inspecting the coil end for a coil end of a winding wound around a circumferential stator core of a motor and provided with an allowable dimension in the height direction that changes for each circumferential portion. In
An inspection part having an inner surface formed with a predetermined outer shape and a predetermined interval on the design of the coil end, and an inspection part slide mechanism for sliding the inspection part in a height direction corresponding to an allowable dimension in the height direction; ,
A coil end inspection device characterized by comprising: In the coil end inspection apparatus according to claim 1,
A height reference ring having a height direction dimension that changes for each circumferential portion corresponding to the height direction tolerance dimension;
The coil end inspection device, wherein the inspection component slide mechanism slides the inspection component in accordance with a height dimension of the height reference ring. In the coil end inspection apparatus according to claim 1 or 2,
The coil end inspection device according to claim 1, wherein the allowable dimension in the height direction includes a gradually changing portion that gradually changes in the circumferential direction. In the coil end inspection apparatus according to claim 2 or claim 3,
The coil end inspection device, wherein the inspection component slide mechanism includes a reference gauge for positioning the inspection component in the height direction by contacting the first end surface of the height reference ring. The coil end inspection device according to any one of claims 2 to 4,
A coil end inspection device comprising a phase positioning groove for positioning a phase with a stator core on a second end face of the height reference ring. Coil end inspection method for visually inspecting a coil end for a coil end of a winding wound around a circumferential stator core of a motor and provided with an allowable dimension in a height direction that changes for each circumferential portion. In
An inspection component having an inner surface formed with a predetermined outer shape and a predetermined interval is used for the coil end, and the inspection component is slid in a height direction corresponding to an allowable dimension in the height direction. thing,
A coil end inspection method comprising:

Images