JP5055531B2 - Resolver stator structure - Google Patents

Description

  The present invention relates to a resolver stator structure, and in particular, an inner diameter expansion portion is provided in a slack pin insertion hole, and a varnish that has entered the slack pin insertion hole is configured to accumulate in the inner diameter expansion portion, whereby an end line is a terminal. The present invention relates to a novel improvement for making it possible to prevent the varnish from flowing out through the loose pin insertion hole from the side tangled to the pin to the opposite side, and to improve reliability and productivity.

  As this type of resolver stator structure conventionally used, for example, a resolver stator structure shown in Patent Document 1 is used. 4 is a plan view showing a conventional resolver stator structure, FIG. 5 is a cross-sectional view of the resolver stator structure of FIG. 4, and FIG. 6 is an enlarged cross-sectional view of the loose pin insertion hole 8 of FIG. . In FIG. 4, a stator winding 3 is wound around the magnetic pole 2 of the annular stator core 1. Between the annular stator core 1 and the stator winding 3, first and second annular insulating covers 4 and 5 made of resin are interposed. That is, the first and second annular insulating covers 4 and 5 electrically insulate the annular stator core 1 and the stator winding 3 from each other on both surfaces of the annular stator core 1. The first and second annular insulating covers 4 and 5 may be provided separately from each other, or may be provided integrally with the annular stator core 1 by insert molding.

  A part of the first annular insulating cover 4 is provided with a terminal holding portion 6 protruding in the radial direction. The terminal holding portion 6 is provided with a plurality of terminal pins 7 and a plurality of slack pin insertion holes 8, and an end line 3 a of the stator winding 3 wound around the magnetic pole 2 is connected to the terminal pin 7. It is tied. The loose pin insertion hole 8 is disposed between each terminal pin 7 and the magnetic pole 2, and the loose pin 9 is inserted therein.

  Each terminal pin 7 and each loose pin insertion hole 8 are arranged so as to be shifted from each other in the width direction of the terminal holding portion 6, and the end line 3 a is entangled with the terminal pin 7 via the loose pin 9. As a result, the end line 3a is not linear. That is, the slack pin 9 is removed after the end line 3a is entangled with the terminal pin 7, thereby forming a slack in the end line 3a. And after a slack is formed in the end line 3a, a varnish is supplied and the stator winding 3 and the end line 3a are impregnated.

JP-A-2005-312088

  In the conventional resolver stator structure as described above, since the slack pin insertion hole 8 has a linear shape without a step or the like, the supplied varnish easily passes through the slack pin insertion hole 8. For this reason, a problem that the varnish flows out to the back side of the terminal holding portion 6 and adheres to the annular stator core 1 occurs. Moreover, since the varnish flows out to unnecessary portions, it becomes difficult to control the supply amount of the varnish, which causes poor varnish impregnation. Therefore, product reliability and productivity deteriorate.

  The present invention has been made to solve the above-described problems, and its purpose is to allow the varnish to flow out through the loose pin insertion hole from the side where the end line is entangled with the terminal pin to the opposite side. It is an object of the present invention to provide a resolver stator structure capable of suppressing the above-described problems and improving reliability and productivity.

The resolver stator structure according to the present invention includes a slack pin inserted into a slack pin insertion hole of the terminal holding portion when the end line of the stator winding wound around the magnetic pole is entangled with the terminal pin of the terminal holding portion. A resolver stator structure in which a slack is formed in the end line using the step, the slack pin is removed from the slack pin insertion hole after the slack is formed, and the end line is impregnated with a varnish. An inner diameter expansion portion having an inner diameter larger than other inner diameters is provided in a part of the pin insertion hole, and the varnish that has entered the loose pin insertion hole during the impregnation treatment is configured to accumulate in the inner diameter expansion portion. .
Further, the terminal holding portion is provided with a first end surface on the side where the end line is entangled with the terminal pin, and a second end surface facing the first end surface, and the loose pin insertion hole includes It consists of the 1st hole part formed in the 1st end surface side, and the 2nd hole part formed in the said 2nd end surface side, and the said 2nd hole part is larger than the 1st internal diameter of the said 1st hole part. In addition to having a second inner diameter, the inner diameter expansion portion is included.
Furthermore, a projecting piece that projects from the inner wall of the first hole portion toward the central axis of the first hole portion is provided at a connection portion between the first hole portion and the second hole portion.
Furthermore, the inner diameter expanding portion forms a tapered shape that is stepped toward the second end face side.

According to the resolver stator structure of the present invention, the varnish that has entered the slack pin insertion hole is configured to accumulate in the inner diameter expansion portion, so that the slack pin insertion from the side where the end line is tangled to the terminal pin to the opposite side It is possible to suppress the varnish from flowing out through the holes, and to improve reliability and productivity.
In addition, since the second hole portion has a second inner diameter larger than the first inner diameter of the first hole portion and the inner diameter expansion portion, the varnish can be more reliably stored in the inner diameter expansion portion. The varnish outflow can be reliably suppressed.
Furthermore, since a protruding piece that protrudes from the inner wall of the first hole portion toward the central axis of the first hole portion is provided at the connection portion between the first hole portion and the second hole portion, The movement of the varnish to the two holes can be suppressed, and the outflow of the varnish can be more reliably suppressed.
Furthermore, since the inner diameter expansion portion forms a tapered shape that expands toward the second end face, the varnish can be more reliably stored in the inner diameter expansion portion, and the outflow of the varnish can be more reliably suppressed. .

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a sectional view of a resolver stator structure according to Embodiment 1 of the present invention. Since the overall configuration of the resolver stator structure according to the first embodiment of the present invention is the same as the overall configuration of the conventional resolver stator structure, FIG. 4 is used to describe the first embodiment. The same or equivalent parts as those of the conventional resolver stator structure will be described using the same reference numerals.
1 and 4, a stator winding 3 is wound around the magnetic pole 2 of the annular stator core 1. Between the annular stator core 1 and the stator winding 3, first and second annular insulating covers 4 and 5 made of resin are interposed. That is, the first and second annular insulating covers 4 and 5 electrically insulate the annular stator core 1 and the stator winding 3 from each other on both surfaces of the annular stator core 1. The first and second annular insulating covers 4 and 5 may be provided separately from each other, or may be provided integrally with the annular stator core 1 by insert molding.

  A part of the first annular insulating cover 4 is provided with a terminal holding portion 6 protruding in the radial direction. The terminal holding part 6 is provided with a plurality of terminal pins 7 and a plurality of slack pin insertion holes 8, and an end line 3 a (see FIG. 4) of the stator winding 3 wound around the magnetic pole 2. It is entangled with the terminal pin 7. The slack pin insertion hole 8 is disposed between each terminal pin 7 and the magnetic pole 2, and a slack pin 9 (see FIG. 4) is inserted therein.

  As shown in FIG. 4, each terminal pin 7 and each loose pin insertion hole 8 are arranged to be shifted from each other in the width direction of the terminal holding portion 6, and the end line 3 a passes through the loose pin 9. By being entangled with the terminal pin 7, the end line 3a is prevented from being linear. That is, the slack pin 9 is removed after the end line 3a is entangled with the terminal pin 7, thereby forming a slack in the end line 3a. And after a slack is formed in the end line 3a, a varnish is supplied and the stator winding 3 and the end line 3a are impregnated.

  Next, FIG. 2 is an enlarged sectional view of the slack pin insertion hole 8 of FIG. In the figure, the loose pin insertion hole 8 is composed of a first hole portion 11 and a second hole portion 12. Here, the end face of the terminal holding part 6 on the side where the end line 3a is entangled with the terminal pin 7 is called a first end face 6a, and the end face on the back side facing the first end face 6a is called a second end face 6b. .

  The first hole portion 11 is formed on the first end face 6 a side and has a first inner diameter D <b> 1 that is approximately the same as that of the slack pin 9. That is, the slack pin 9 (see FIG. 4) is positioned by being inserted into the first hole portion 11. The second hole portion 12 is formed on the second end face 6b side, and has a second inner diameter D2 that is larger than the first inner diameter D1. That is, the second hole portion 12 has an inner diameter expanding portion 8 a having an inner diameter larger than the other inner diameter in the loose pin insertion hole 8. The varnish that has entered the loose pin insertion hole 8 during the impregnation process is stored in the inner diameter expansion portion 8a.

  Further, the connecting portion between the first hole portion 11 and the second hole portion 12, that is, the step portion 15, is directed from the inner wall 11a of the first hole portion 11 toward the central axis 11b of the first hole portion 11. A protruding piece 13 is provided. Here, as described above, the terminal holding portion 6 is formed of resin. That is, the terminal holding part 6 is formed by injecting resin between the male mold and the female mold. The protruding piece 13 is an annular burr formed intentionally by creating a gap between the male mold and the female mold at the step portion 15. The protruding piece 13 has a flexibility that does not hinder the attachment and detachment of the slack pin 9 (see FIG. 4) and has a strength that prevents the varnish from moving from the first hole 11 to the second hole 12. Adjusted to thickness.

  According to such a resolver stator structure, the varnish that has entered the loose pin insertion hole 8 during the impregnation process is configured to accumulate in the inner diameter expansion portion 8a. Therefore, the loose pin from the first end surface 6a to the second end surface 6b. It is possible to suppress the varnish from flowing out through the insertion hole 8. Thereby, it can suppress that a varnish adheres to the ring-shaped stator core 1 along the 2nd end surface 6b, and can improve the reliability of a product. In addition, unnecessary varnish can be omitted, the rate of occurrence of poor varnish impregnation due to insufficient varnish can be reduced, and productivity can be improved.

  Moreover, since the protrusion piece 13 is provided, the movement of the varnish from the 1st hole part 11 to the 2nd hole part 12 can be suppressed, and the outflow of a varnish can be suppressed more reliably. Thereby, the work conventionally performed to prevent the varnish from flowing out can be made unnecessary, and the cost can be reduced.

Embodiment 2. FIG.
FIG. 3 is an enlarged cross-sectional view showing the loose pin insertion hole 8 of the resolver stator structure according to the second embodiment of the present invention. Note that portions that are the same as or equivalent to those in Embodiment 1 are described using the same reference numerals.
In the first embodiment, the inner diameter expanded portion 8a is formed in a straight line, but the inner diameter expanded portion 8a in the second embodiment is a taper that expands toward the second end face 6b side of the terminal holding portion 6. It is formed into a shape.

  As described above, even with the inner diameter expanded portion 8a formed in the tapered shape, the varnish can be stored in the second hole portion 12, and the varnish outflow can be more reliably suppressed. In the configuration of the second embodiment, the protruding piece 13 described in the first embodiment may be formed.

It is sectional drawing of the resolver stator structure by Embodiment 1 of this invention. It is sectional drawing which expands and shows the slack pin insertion hole of FIG. It is sectional drawing which expands and shows the slack pin insertion hole of the resolver stator structure by Embodiment 2 of this invention. It is a top view which shows the conventional resolver stator structure. It is sectional drawing of the resolver stator structure of FIG. It is sectional drawing which expands and shows the slack pin insertion hole of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ring-shaped stator core 2 Magnetic pole 3 Stator winding 3a End wire 4 1st ring-shaped insulation cover 5 2nd ring-shaped insulation cover 6 Terminal holding part 6a 1st end surface 6b 2nd end surface 7 Terminal pin 8 Slack pin insertion hole 8a Inner diameter expansion part 9 Looseness Pin 11 1st hole 11a Inner wall 11b Center axis 12 2nd hole 13 Projection piece D1 1st inside diameter D2 2nd inside diameter

Claims (4)

When the end wire (3a) of the stator winding (3) wound around the magnetic pole (2) is bound to the terminal pin (7) of the terminal holding portion (6), the terminal holding portion (6) is loosened. The slack pin (9) inserted into the pin insertion hole (8) is used to form a slack in the end line (3a), and after the slack formation, the slack pin (9) is removed from the slack pin insertion hole (8). A resolver stator structure that is removed and impregnated with the varnish of the end line (3a),
The varnish that is provided in part of the slack pin insertion hole (8) with an inner diameter expansion portion (8a) having an inner diameter larger than the other inner diameter, and has entered the slack pin insertion hole (8) during the impregnation process. The resolver stator structure is configured such that is accumulated in the inner diameter expansion portion (8a). In the terminal holding part (6),
A first end face (6a) on the side where the end line (3a) is bound to the terminal pin (7);
A second end face (6b) facing the first end face (6a);
The loose pin insertion hole (8)
A first hole (11) formed on the first end face (6a) side;
The second hole (12) formed on the second end face (6b) side,
The second hole (12) has a second inner diameter (D2) larger than the first inner diameter (D1) of the first hole (11) and also has the inner diameter expansion part (8a). The resolver stator structure according to claim 1.   The connecting portion between the first hole (11) and the second hole (12) has a central axis of the first hole (11) from the inner wall (11a) of the first hole (11). Resolver stator structure according to claim 2, characterized in that a projecting piece (13) projecting towards 11b) is provided.   The resolver stator structure according to claim 2, wherein the inner diameter expansion portion (8a) has a tapered shape that expands toward the second end surface (6b).

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