JP4090750B2 - Resolver - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resolver, and more particularly, a protrusion of one annular plastic cover for covering a stator winding provided on each magnetic pole is connected to the inner surface of the other annular plastic cover through a slot of the annular stator, The present invention also relates to a novel improvement for achieving a simple resolver structure and a reduced outer diameter.
[0002]
[Prior art]
Conventionally used resolvers of this type include the configuration of the resolver 20 generally shown in FIGS. That is, what is indicated by reference numeral 1 in FIGS. 7 to 12 is a ring-shaped stator in which a stator winding 3 is provided on each magnetic pole 2. It is provided so that it may not contact directly.
[0003]
First and second annular plastic covers 7 and 8 are provided on both surfaces of the annular stator 1 so as to cover the stator winding 3, and the first annular plastic covers 7 are shown in FIGS. 9 and 10. It is configured to be.
That is, a plurality of tongue pieces 9 extending along the radial direction are provided at a required angular position on the outer peripheral surface of the first annular plastic cover 7. Similarly, a terminal holding portion 10 extending along the radial direction is formed, and a terminal 11 to which the stator winding 3 is connected is held in the terminal holding portion 10.
[0004]
As shown in FIGS. 11 and 12, the second annular plastic cover 8 has an outer peripheral surface extending in the radial direction at a position corresponding to each tongue piece 9 and an axis perpendicular to the radial direction. A protrusion 10 extending inward along the direction is formed.
Therefore, when the above-described annular plastic covers 7 and 8 are attached to both surfaces of the annular stator 1, the projections 10 come into contact with the tongue pieces 9, and an ultrasonic welding jig (not shown) is formed from the outer surface of the tongue pieces 9. By irradiating with ultrasonic waves, the contact portion between the tongue piece 9 and the projection 10 is melted and solidified, so that the tongue piece 9 and the projection 10 are melted and connected.
[0005]
[Problems to be solved by the invention]
Since the conventional resolver is configured as described above, the following problems exist.
That is, since the tongue piece and the protrusion formed on each annular plastic cover are formed on the outer peripheral surface thereof, the tongue piece and the protrusion are located outside the outer peripheral surface of the annular stator, and the outer diameter of the resolver is reduced. In addition to being an obstacle for reducing the diameter, the protruding portion has become an obstacle when attaching the resolver to an apparatus or the like.
[0006]
The present invention has been made to solve the above-described problems, and in particular, the projection of one annular plastic cover for covering the stator winding provided on each magnetic pole passes through the slot of the annular stator, and the other It is an object of the present invention to provide a resolver that is connected to the inner surface of a ring-shaped plastic cover and that achieves a simplified resolver structure and a reduced outer diameter.
[0007]
[Means for Solving the Problems]
In the resolver according to the present invention, a rotor is rotatably disposed inside a ring-shaped stator in which magnetic poles and slots for winding the stator winding are alternately formed, and the stator winding is covered on both surfaces of the ring-shaped stator. In the resolver provided with a pair of first and second annular plastic covers, the resolver has a plurality of projections formed to project from the second inner surface of one of the annular plastic covers. Each protrusion penetrates the slot and is connected to the first inner surface of the first annular plastic cover, and the connection between the protrusion and the first inner surface is made by ultrasonic welding. It is a configuration.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a resolver according to the present invention will be described with reference to the drawings. Note that the same or equivalent parts as in the conventional example will be described using the same reference numerals.
1 to 6, a reference numeral 1 denotes a ring-shaped stator in which a stator winding 3 is provided in each magnetic pole 2 (that is, in the slot 2A). The stator winding 3 includes a pair of ring-shaped insulating members (not shown). And the magnetic pole 2 are not directly in contact with each other.
[0009]
First and second annular plastic covers 7 and 8 are provided on both surfaces of the annular stator 1 so as to cover the stator winding 3, and the first annular plastic cover 7 is shown in FIGS. 3 and 4. It is configured to be.
That is, the first inner surface 7a of the first annular plastic cover 7 is provided with a plurality of contact portions 9 at a required angular position at a position inside the outer peripheral surface, and a part of the outer peripheral surface has a radius. A terminal holding portion 10 extending in the direction is formed, and the terminal holding portion 10 is configured to hold a terminal (not shown) to which the stator winding 3 is connected.
[0010]
As shown in FIGS. 5 and 6, the second annular plastic cover 8 has a plurality of protrusions inward along the axial direction on the inner surface of the second inner surface 8 a and the outer peripheral surface. The protrusions 10 are formed so as to pass through the slots 2A and contact the contact portions 9 to be connected.
A known variable reluctance type rotor 21 having, for example, a non-circular shape and having no rotor winding is rotatably disposed inside the annular stator 1.
[0011]
The projections 10 and the contact portions 9 can be connected with an adhesive, but by irradiating ultrasonic waves from the welded portion 30 on the outer surface of the contact portions 9 with an ultrasonic welding jig (not shown). Since the contact portion between the contact portion 9 and the protrusion 10 is melted and solidified, the contact portion 9 and the protrusion 10 are melted and connected, and as a result, the protrusion 10 and the first inner surface 7a are connected. It will be.
[0012]
【The invention's effect】
Since the resolver according to the present invention is configured as described above, the following effects can be obtained.
That is, since the projection for connecting each annular plastic cover penetrates the slot of the annular stator and is connected to the contact portion, each projection is not positioned outside the annular stator as in the prior art. The outer diameter of the resolver is only the outer diameter of the annular stator, and a reduction in diameter can be achieved.
Moreover, since each protrusion is not located outside the ring-shaped stator, there is no obstacle when the resolver is attached to the apparatus side, and the attaching operation and the attaching structure can be greatly facilitated as compared with the conventional case.
[Brief description of the drawings]
FIG. 1 is a plan view illustrating a resolver from which a first annular plastic cover according to the present invention has been removed.
2 is a cross-sectional view taken along the line AA of the resolver of FIG. 1 provided with respective covers.
FIG. 3 is a right side view showing the first annular plastic cover of FIG. 2;
4 is a cross-sectional view of FIG.
5 is a left side view showing the second annular plastic cover of FIG. 2. FIG.
6 is a cross-sectional view taken along line A-O-A in FIG.
FIG. 7 is a front view showing a conventional resolver.
8 is a cross-sectional view of FIG.
9 is a left side view showing the first annular plastic cover of FIG. 8. FIG.
10 is a cross-sectional view taken along line A-O-A in FIG.
11 is a right side view showing the second annular plastic cover of FIG. 8. FIG.
12 is a cross-sectional view taken along B-O-B in FIG. 11;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ring-shaped stator 2 Magnetic pole 2A Slot 3 Stator winding 7 1st ring-shaped plastic cover 8 2nd ring-shaped plastic cover 7a 1st inner surface 8a 2nd inner surface 10 Protrusion 21 Rotor

Claims (2)

A rotor (21) is rotatably disposed inside a ring-shaped stator (1) in which magnetic poles (2) and slots (2A) for winding the stator winding (3) are alternately formed, and the ring-shaped stator ( In a resolver having a pair of first and second annular plastic covers (7, 8) so as to cover the stator winding (3) on both sides of 1),
A plurality of protrusions (10) formed to protrude from the second inner surface (8a) of one second annular plastic cover (8) of the annular plastic covers (7, 8). 10) A resolver characterized in that it is connected to the first inner surface (7a) of the first annular plastic cover (7) through the slot (2A). The resolver according to claim 1, wherein the connection between the protrusion (10) and the first inner surface (7a) is made by welding with ultrasonic waves.

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