JP3383622B2 - Insulation cap structure of rotation detector - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an insulating cap structure for a rotation detector, and more particularly, to a crossover guide for guiding a crossover having a flat plate having an opening. By doing so, the amount of varnish agent that accumulates at the position of the crossover wire is reduced, and a new varnish agent to prevent cracking of the varnish agent and disconnection of the winding that occurs during a heat cycle after solidifying the winding with the varnish agent. Regarding improvement. 2. Description of the Related Art As an insulating cap structure of a rotation detector of this type which has been conventionally used, a structure shown in FIGS. 2 to 4 can be cited. That is, what is denoted by reference numeral 1 in FIG. 2 is a ring-shaped core formed of a lamination type or a sintered type and having a plurality of salient pole portions 2 and slits 3 arranged alternately and in a ring shape. A pair of annular insulating cap bodies 4 (only one is shown in the figure) are provided on both end faces of the core 1. [0003] The insulating cap member 4 is provided with each of the salient pole portions 2.
Salient pole cover 4A formed so as to cover the outer periphery of the slit and slit cover 4 formed so as to cover the slit 3
B are provided alternately and continuously, and at the outermost position of the slit cover 4B, a plate-shaped crossover guide portion 5 erected along the axial direction is provided. At a position outside the crossover guide 5 of the insulating cap body 4,
A ring-shaped wall 6 is formed in a ring shape, and a gap 7 for guiding the crossover 10 a is formed between the crossover guide 5 and the ring-shaped wall 6. Next, in the state shown in FIG.
As shown in FIG. 4, this winding 10 is wound around the outer periphery of each salient pole portion 2, that is, each salient pole portion covering portion 4A, and is wound between the salient pole portion covering portions 4A. 10 crossovers 10
When a is passed, it is guided through the space 7 outside each of the crossover guides 5. Next, after the winding 10 is wound as described above, a potting agent such as a varnish agent (not shown) is filled in each salient pole portion covering portion 4A and the gap 7, and the winding 10 is wound.
And the protection from the outside of the crossover 10a is performed. [0006] Since the conventional insulating cap structure of the rotation detector is configured as described above,
The following issues existed. That is, after winding the winding, a potting agent such as a varnish is filled and cured by heating. At this time, since the crossover guide is flat,
Since the varnish agent supplied to the space outside the crossover guide portion was difficult to flow from this portion, and the amount was large,
When a heat cycle is applied, the varnish agent is apt to crack, and when the crack is formed, a crossover wire or a winding may be broken, resulting in a fatal defect. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In particular, the present invention has a crossover guide portion for guiding a crossover formed of a flat plate having an opening so that the crossover position can be reduced. The insulation cap structure of the rotation detector was designed to reduce the amount of varnish agent that accumulates and to prevent cracking of the varnish agent and disconnection of the winding that occur when applying a heat cycle after solidifying the winding with the varnish agent. The purpose is to provide. According to the present invention, there is provided an insulation cap structure for a rotation detector, wherein a winding is wound around a ring-shaped core having a plurality of salient pole portions through a ring-shaped insulation cap body. In an insulating cap structure of a rotation detector configured to guide a crossover of a winding via a crossover guide formed on the insulating cap, the crossover guide is formed of a flat plate and the flat plate is Has a configuration in which an opening is formed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the insulating cap structure of a rotation detector according to the present invention will be described below with reference to the drawings. The same or equivalent parts as those in the conventional example will be described with the same reference numerals, and since the structure of the rotation detector is the same as that of FIG. 2, FIG. This will be described with reference to FIG. In FIG. 1, the salient pole portions 2 and the slits 3 are arranged alternately and in a ring shape, and a pair of insulating cap bodies 4 having a ring shape are provided on both end surfaces of the annular core 1 having the salient pole portions 2 between the slits 3.
(Only one is shown in the figure). The insulating cap member 4 is provided with the salient pole portions 2.
Salient pole cover 4A formed so as to cover the outer periphery of the slit and slit cover 4 formed so as to cover the slit 3
B are alternately formed in a continuous or plural state, and at the outermost position of the slit cover portion 4B, a flat plate body 5A having an opening 5B is provided upright along the axial direction. A crossover guide 5 is provided. An opening 5 in the flat plate 5A of the crossover guide 5 is provided.
B is configured so that a varnish or the like described later can easily flow. A ring-shaped ring-shaped wall 6 is formed at a position outside the insulated crossover guide 5 of the insulating cap body 4.
A crossover 10 a is provided between the crossover guide 5 and the annular wall 6.
Is formed. Therefore, each flat body 5 </ b> A is located between the annular wall 6 and the slit 3. Next, when the winding 10 is wound in the state shown in FIG. 1 (actually formed in a ring shape, but only a part is shown), the winding 10 shown in FIG. As shown in the figure, when each of the salient pole portions 2, that is, each salient pole portion covering portion 4 </ b> A is wound around the outer periphery of each salient pole portion covering portion 4 </ b> A, the Void 7 outside part 5
It is guided via. Next, after the winding 10 is wound as described above, a potting agent such as a varnish (not shown) is filled in each salient pole portion covering portion 4A and the gap 7, and the winding 10 and the transition Protection from the outside of the line 10a is provided. In this case, when the varnish in the molten state is filled as described above, the opening 5B is formed in the crossover guide portion 5, so that the opening 5B is formed.
The varnish flows from B to the slit 3 side, so that much varnish does not accumulate at the position of the crossover 10a on the back side of the crossover guide 5 as in the related art. Therefore, since a large amount of varnish does not accumulate at the position of the crossover wire 10a as in the prior art and its thickness is small, even when a heat cycle is applied thereafter, the varnish does not easily crack. Disconnection of the crossover 10a and the like can be effectively prevented. [0015] The insulating cap structure of the rotation detector according to the present invention is configured as described above, so that the following effects can be obtained. That is, since the crossover guide portion for guiding the crossover is formed of a flat plate having an opening, the varnish flows through the opening, and a large amount of the varnish flows to the crossover position even when the varnish is filled. The varnish does not accumulate, the thickness is much thinner than before, cracks are prevented from occurring during a heat cycle, and as a result, breakage of windings such as crossovers is also prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a part of an insulating cap structure of a rotation detector according to the present invention. FIG. 2 is a perspective view showing a conventional configuration. FIG. 3 is a perspective view of a main part of FIG. 2; FIG. 4 is a plan view of a main part of FIG. 2; [Description of Signs] 1 annular core 2 salient pole section 3 slit 4 winding cap body 5 crossover wire guide section 5A flat plate body 5B opening 6 annular wall 10 winding 10a crossover wire W slit width

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Claims (1)

(57) [Claims 1] A winding (10) is wound around a ring-shaped core (1) having a plurality of salient pole portions (2) via a ring-shaped insulating cap body (4). Connecting the crossover wire (10a) of the winding (10) to the insulating cap body
(4) In the insulating cap structure of the rotation detector so as to guide through the crossover guide portion (5) formed in (4), the crossover guide portion (5) is formed of a flat plate (5A), and An insulating cap structure for a rotation detector, wherein an opening (5B) is formed in the flat body (5A).