JP2009131033A - Insulation cover structure of resolver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem, wherein for a conventional resolver, since the end face of the body of an insulation cover structure on the periphery of a cross-pin is separated from a transition wire, the transition wire cannot be covered with varnish, when the varnish is sucked togather to the cross-pin and the varnish on the periphery of a cross-pin decreases, thus being unable to produce a floating wire. <P>SOLUTION: An insulation cover structure of a resolver is constituted, such that a protrusion 17 protruding from an insulated ring 13 in the axial direction A thereof is provided between respective magnetic pole covers 15 of the insulated ring 13 so as to approach or come into contact with a transition wire 2a which is hooked on a cross-pin 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an insulating cover structure for a resolver, and in particular, an insulating ring-shaped protrusion projecting in an axial direction from an end surface of an insulating ring-shaped body so as to be close to or in contact with a connecting wire portion hung on a jumper pin. By providing it between each magnetic pole cover of the body, even when the varnish is attracted to the crossover pin, the crossover portion of the stator winding can be more reliably covered with the varnish, and the possibility of floating lines can be reduced The present invention relates to a new improvement for achieving the above.

  As an insulating cover structure of this type of resolver that has been conventionally used, for example, an insulating cover structure of a resolver disclosed in Patent Document 1 is used. FIG. 5 is a cross-sectional view showing an insulating cover structure of a conventional resolver. In the figure, a stator winding 2 is wound around a magnetic pole (not shown) of a ring-shaped stator core 1. Further, first and second insulating cover bodies 11 and 12 made of resin are attached to both surfaces of the annular stator core 1. The first and second insulating cover bodies 11 and 12 are interposed between the annular stator core 1 and the stator winding 2, and the annular stator core 1 and the stator winding 2 are mutually connected on both surfaces of the annular stator core 1. It is electrically insulated. The first and second insulating cover main bodies 11 and 12 are provided separately from each other and attached to the annular stator core 1 so as to sandwich the annular stator core 1, and integrally with the annular stator core 1 by insert molding. Sometimes formed.

  The stator winding 2 is wired so as to cross between the magnetic poles, and the portion of the stator winding 2 that crosses between the magnetic poles is called a crossover portion 2a. The first insulating cover body 11 is provided with a crossover pin 16 that protrudes along the axial direction A from the end surface 11a of the first insulating cover body 11 at a position between the magnetic poles. The crossover portion 2a is hung on the crossover pin 16 for at least a half turn.

JP 2004-135429 A

  By the way, as shown in FIG. 6, the stator winding 2 is impregnated with the varnish 5 by potting, but the varnish 5 may be attracted to the crossover pin 16 in some cases. In the conventional resolver insulating cover structure as described above, the end face 11a of the insulating cover body 11 around the crossover pin 16 and the crossover portion 2a are separated from each other. When the varnish 5 around 16 decreases, the crossover part 2a cannot be covered with the varnish 5, and a floating line may be generated. When a floating line is generated, disconnection is likely to occur due to thermal contraction. For this reason, the operation | work which adds the varnish 5 to the floating line generation | occurrence | production part is needed, and productivity has deteriorated.

  The present invention has been made to solve the above-described problems, and its purpose is to more reliably cover the stator windings between the magnetic poles with varnish, and to reduce the possibility of occurrence of floating lines. It is an object to provide an insulating cover structure for a resolver.

The insulating cover structure of the resolver according to the present invention comprises first and second insulating cover bodies provided separately or integrally with each other, and electrically insulates the annular stator core and the stator winding from both sides of the annular stator core. An insulating cover structure for a resolver, wherein the insulating ring-shaped body is provided on the first and second insulating cover bodies and attached to the ring-shaped stator core, and the insulating ring-shaped body is spaced apart from each other in the circumferential direction of the insulating ring-shaped body. A plurality of magnetic pole covers that protrude inward from the body and are interposed between the magnetic poles of the annular stator core and the stator windings, and between the respective magnetic pole covers, from the end face of the insulating annular body, A jumper pin projecting in the axial direction and hooked with a jumper portion of the stator winding passed between the magnetic poles, and between the magnetic pole covers of the insulating ring-shaped body It extends in the circumferential direction of the insulating ring-shaped body between the magnetic pole covers, and extends in the axial direction of the insulating ring-shaped body from the end surface of the insulating ring-shaped body so as to be close to or in contact with the crossover wire portion hung on the crossover pin A protruding portion is provided.
In addition, the insulating cover structure for a resolver, wherein both side portions of the protruding portion along the circumferential direction of the insulating ring-shaped body have an R shape.

According to the insulating cover structure of the resolver of the present invention, the protruding portion protrudes in the axial direction of the insulating ring-shaped body from the end surface of the insulating ring-shaped body so as to be close to or in contact with the connecting wire section hung on the jumper pin. Therefore, even when the varnish is sucked to the crossover pin, the crossover portion can be more reliably covered with the varnish, and the possibility that a floating line is generated can be reduced. Thereby, generation | occurrence | production of the disconnection of a floating line part can be prevented and reliability can be improved. Further, it is possible to eliminate the work of adding varnish to the floating line generating portion, and the productivity can be improved.
In addition, since both sides of the projecting portion have an R shape, the stator windings are not easily damaged even if they come into contact with both sides, and the possibility of occurrence of disconnection can be more reliably reduced.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a cross-sectional view showing an insulating cover structure of a resolver according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing a first insulating cover body 11 of FIG. 1, and FIG. 3 is a crossover pin of FIG. It is a top view which shows 16 periphery. In addition, about the same or equivalent part as the conventional goods, it demonstrates using the same code | symbol. In FIG. 1, a stator winding 2 is wound around a magnetic pole (not shown) of a ring-shaped stator core 1. Further, first and second insulating cover bodies 11 and 12 are provided on both surfaces of the annular stator core 1. The first and second insulating cover bodies 11 and 12 are provided separately from each other, and are attached to the annular stator core 1 so as to sandwich the annular stator core 1. In addition, although demonstrated in this embodiment as a different body, the 1st and 2nd insulating cover main bodies 11 and 12 may be integrally formed with the annular stator core 1 by insert molding.

  As shown in FIG. 2, the first insulating cover body 11 is provided with an insulating ring-shaped body 13, a ring-shaped wall 14, a magnetic pole cover 15, and a jumper pin 16. The insulating ring-shaped body 13 is formed in a ring shape as a whole, and is a part attached to the ring-shaped base portion of the ring-shaped stator core 1. The ring-shaped wall 14 is erected on the outer edge of the insulating ring-shaped body 13. The magnetic pole cover 15 protrudes inward from the insulating ring-shaped body 13 at intervals in the circumferential direction B of the insulating ring-shaped body 13 and is interposed between the magnetic pole of the ring-shaped stator core 1 and the stator winding 2. Is done. Similarly to the first insulating cover main body 11, the second insulating cover main body 12 is also provided with an insulating ring-shaped body 13, an annular wall 14, a magnetic pole cover 15, and a jumper pin 16. That is, the first and second insulating cover bodies 11 and 12 electrically insulate the annular stator core 1 and the stator winding 2 from each other on both surfaces of the annular stator core 1.

  Returning to FIG. 1, the stator winding 2 is wired so as to cross between the magnetic poles, and a portion crossing between the magnetic poles is called a crossover portion 2 a. Here, the first insulating cover body 11 is provided with a crossover pin 16 that protrudes in the axial direction A of the insulating ring-shaped body 13 from the end surface 13a of the insulating ring-shaped body 13 at a position between the magnetic poles ( 1 and 3). The crossover part 2a is hung on the crossover pin 16 for at least a half turn.

  Further, as shown in FIGS. 1 and 3, between the magnetic pole covers 15 of the insulating ring-shaped body 13, the gap pins 15 extend in the circumferential direction B of the insulating ring-shaped body 13 between the magnetic pole covers 15. A projecting portion 17 projecting in the axial direction A of the insulating ring-shaped body 13 from the end surface 13 a of the insulating ring-shaped body 13 is provided so as to be close to the crossover portion 2 a hung on 16. In addition, the protrusion part 17 may contact the said connecting wire part 2a.

  Both side portions 17a of the projecting portion 17 along the circumferential direction B of the insulating ring-shaped body 13 have an R shape. That is, the both side parts 17a are comprised by the curved surface. Further, the protruding amount of the crossover pin 16 is larger than the protruding amount of the protruding portion 17. Further, as shown in FIG. 3, the protruding portion 17 extends along the radial direction C of the insulating ring-shaped body 13 from the inner diameter side to the outer diameter side of the insulating ring-shaped body 13.

  Next, the effect | action of the protrusion part 17 is demonstrated. FIG. 4 is an explanatory view showing a varnish-impregnated state in the insulating cover structure of the resolver of FIG. In the figure, the stator winding 2 is impregnated with varnish 5 by potting, and the varnish 5 is supplied to the crossover portion 2a. At this time, the varnish 5 around the crossover pin 16 is attracted to the crossover pin 16 and the varnish 5 around the crossover pin 16 is reduced. However, since the projecting portion 17 is provided close to the crossover portion 2a, the varnish Even if 5 is reduced, the crossover part 2a can be covered with the varnish 5, and the possibility of floating lines can be reduced. Thereby, generation | occurrence | production of the disconnection of a floating line part can be prevented and reliability can be improved. Further, the work of adding the varnish 5 to the floating line generating portion can be made unnecessary, and the productivity can be improved.

  In addition, by providing the projecting portion 17, the stator winding 2 may come into contact with the side portion 17 a of the projecting portion 17 at the time of wiring. Even if it contacts, the stator winding 2 is hard to be damaged, and the possibility of occurrence of disconnection can be reduced more reliably.

It is sectional drawing which shows the insulating cover structure of the resolver by Embodiment 1 of this invention. It is a perspective view which shows the 1st insulating cover main body of FIG. FIG. 3 is a plan view showing the periphery of a transition pin in FIG. 2. It is explanatory drawing which shows the varnish impregnation state in the insulating cover structure of the resolver of FIG. It is sectional drawing which shows the insulating cover structure of the conventional resolver. It is explanatory drawing which shows the varnish impregnation state in the insulating cover structure of the resolver of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ring-shaped stator core 2 Stator winding 2a Crossover part 11, 12 1st and 2nd insulation cover main body 13 Insulation ring-shaped body 15 Magnetic pole cover 16 Transition pin 17 Protrusion part 17a Side part

Claims (2)

The first and second insulating cover bodies (11, 12) are provided separately or integrally with each other, and the annular stator core (1) and the stator winding (2) are electrically connected to each other on both sides of the annular stator core (1). An insulating cover structure of a resolver that electrically insulates,
An insulating ring-shaped body (13) provided on the first and second insulating cover bodies (11, 12) and attached to the ring-shaped stator core (1);
The insulating ring-shaped body (13) protrudes inward from the insulating ring-shaped body (13) at intervals in the circumferential direction (B), and the magnetic poles of the ring-shaped stator core (1) and the stator winding (2) A plurality of magnetic pole covers (15) interposed therebetween,
The stator winding (2) protruding between the magnetic pole covers (15) from the end face (13a) of the insulating ring-shaped body (13) in the axial direction (A) of the insulating ring-shaped body (13) and passing between the magnetic poles. ) And a crossover pin (16) on which the crossover portion (2a) is hung,
Between the magnetic pole covers (15) of the insulating ring-shaped body (13), it extends in the circumferential direction (B) of the insulating ring-shaped body (13) between the magnetic pole covers (15), and the crossover pins (16 ) Projecting in the axial direction (A) of the insulating ring-shaped body (13) from the end surface (13a) of the insulating ring-shaped body (13) so as to be close to or in contact with the crossover portion (2a) hung on An insulating cover structure for a resolver, wherein a part (17) is provided.   The insulating cover structure for a resolver according to claim 1, wherein both side portions (17a) of the projecting portion (17) along the circumferential direction (B) of the insulating ring-shaped body (13) have an R shape. .

Images