JP2000046583A - Protective structure of resolver rotor coils - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deviations in the axial and rotating directions by coupling a plurality of protrusions on the center opening inner edge of a resin coil cover with coupling grooves of a hollow shaft and a plurality of other protrusions on the side wall with slots of a detector rotor core. SOLUTION: A first coupling groove 7 is formed into the side wall of a hollow shaft 1 near a detector rotor core 4 around the hollow shaft 1 along the radial direction of the rotor core 4 side wall. A plurality of slots are formed axially into the end face 4a of the detector rotor core 4. A plurality of first protrusions are projected from the inner edge of a center opening of a resin coil cover 9 along the radial direction. A plurality of second protrusions are projected axially from the side wall end. Near the first protrusions a slit is formed along the length thereof to render the first protrusions elastic. When the resin coil cover 9 of the detector rotor core 4 is mounted on the hollow shaft 1, the first protrusions are coupled with the first coupling grooves 7 to block it from axially dropping. The second protrusions are coupled with the slots of the detector rotor core 4 to block it from rotating in the rotating direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for protecting a resolver rotor coil, and more particularly, to protecting a detector rotor coil by mounting a resin coil cover so as not to be displaced in both the axial direction and the rotational direction of a hollow shaft. Related to new improvements.

[0002]

2. Description of the Related Art As a conventional structure for protecting a resolver rotor coil of this type which has been used, although not shown, a varnish impregnating agent is applied to the detector rotor coil and the detector rotor coil is fixed to the hollow shaft side. are doing. In addition, potting treatment was performed on the coil end of the detector rotor coil with resin. Further, the ring-shaped resin coil cover is fixed to the hollow shaft side with an adhesive to cover the detector rotor coil.

[0003]

Since the conventional resolver rotor coil protection structure is configured as described above,
The following issues existed. That is, if the protection treatment is performed by using a varnish impregnating agent or potting, the resin is manually applied, so that the treatment shape varies, and the finished shape differs depending on the operator's arm, which may hinder the connection with the motor. there were. In addition, the configuration in which the resin coil cover is attached is simple in operation and does not cause the above-described problem. However, since the resin coil cover is fixed with an adhesive, the resin coil cover may come off when the hollow shaft rotates at high speed.

The present invention has been made to solve the above-mentioned problems, and in particular, a resin coil cover is mounted so as not to be displaced in both the axial direction and the rotational direction of a hollow shaft, and a detector is provided. It is an object of the present invention to provide a resolver rotor coil protection structure for protecting a rotor coil.

[0005]

A resolver rotor coil protection structure according to the present invention has a detector rotor core provided on the outer periphery of a hollow shaft and having a detector rotor coil, and the detector rotor coil is protected by a resin coil cover. In the resolver rotor coil protection structure, a plurality of first protrusions are formed radially inwardly protruding from an inner edge of a center opening of the annular resin coil cover, and a plurality of first projections are formed on a side wall of the resin coil cover in an axial direction. A plurality of second protrusions formed so as to protrude along the first shaft, a first engagement groove formed radially on the peripheral surface of the hollow shaft, and an end surface orthogonal to the peripheral surface of the detector rotor core. Wherein the first projection is engaged with the first engagement groove, and the second projection is engaged within the slit.
A slit is formed near the protrusion along the longitudinal direction of the first protrusion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a resolver rotor coil protection structure according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a hollow shaft having a hollow hole 2, and a detector rotor core 4 having a detector rotor coil 3 is provided on the outer periphery of the hollow shaft 1; A rotor transformer 6 is provided at a position separated from the rotor core 4 via the collar 5.

A first engaging groove 7 having a depth along the radial direction of the peripheral surface of the hollow shaft 1 is formed at a position near the detector rotor core 4 on the outer periphery of the hollow shaft 1. The first engagement groove 7 preferably has a ring-like groove shape, but may have a plurality of recesses. Further, a plurality of slots 4b for providing the detector rotor coil 3 are formed in the axial direction as shown in FIG. 2 on an end surface 4a orthogonal to the peripheral surface of the detector rotor core 4.

As shown in FIGS. 3 to 5, on the motor connection side of the detector rotor coil 3, there is provided a resin coil cover 9 having a ring shape as a whole and having a central opening 8 at its center. . The resin coil cover 9 has a substantially L-shaped cross section at a radial position, and a plurality of first protrusions 10 protruding along the radial direction at the inner edge of the center opening 8. As shown in FIGS. 4 and 5, a plurality of second protrusions 11 are formed at the end of the side wall 9 a of the resin coil cover 9 so as to protrude along the axial direction. Each of the first protrusions 10 is provided with elasticity by forming a slit 12 at a position near the first protrusion 10 along the longitudinal direction of the first protrusion 10. In some cases, the slit 12 is not formed.

Therefore, when the resin coil cover 9 is mounted on the hollow shaft 1, firstly, the first protrusion 10 is engaged with the first engagement groove 7 so that the axial direction can be prevented and fixed. Then, the second protrusion 11 is engaged with each of the slots 4b of the detector rotor core 4, so that the rotation preventing rotation is fixed. At the same time, the motor connection side of the detector rotor coil 3 is completely covered by the resin coil cover 9 and even when the hollow shaft 1 is rotated at a high speed.
Never leave. A motor shaft 20 is inserted into the hollow hole 2 of the hollow shaft 1 so that the detector rotor core 4
, A detector stator core 21 is provided, and a stator transformer 22 is provided outside the rotor transformer 6.

[0010]

Since the resolver rotor coil protection structure according to the present invention is configured as described above, the following effects can be obtained. That is, by engaging the first and second protrusions provided on the resin coil cover with the first engagement groove provided on the hollow shaft and the slot of the core, displacement in the axial direction and the rotation direction is prevented, and thus the simple structure is achieved. Despite the simple structure, complete protection of the detector rotor coil can be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a resolver rotor coil protection structure according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a front view showing the resin coil cover of FIG. 1;

FIG. 4 is a sectional view of FIG. 3;

FIG. 5 is a right side view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hollow shaft 3 Detector rotor coil 4 Detector rotor core 4a End face 4b Slot 7 First engagement groove 8 Center opening 9 Resin coil cover 9a Side wall 10 First projection 11 Second projection 12 Slit

Claims (2)

[Claims] A detector rotor core (4) provided on an outer periphery of a hollow shaft (1) and having a detector rotor coil (3), wherein the detector rotor coil (3) is covered by a resin coil cover (9). In the resolver rotor coil protection structure to protect,
A plurality of first protrusions formed radially on the inner edge of the central opening (8) of the resin coil cover (9) having a ring shape;
(10), a plurality of second protrusions (11) formed on the side wall (9d) of the resin coil cover (9) so as to protrude along the axial direction, and a radial direction on the peripheral surface of the hollow shaft (1). And a slot (4b) formed in an end surface (4a) orthogonal to a peripheral surface of the detector rotor core (4), the first engagement groove (7) being formed along the first groove.
The projection (10) engages with the first engagement groove (7), and the second projection
(11) A resolver rotor coil protection structure characterized in that it is engaged in the slit (4b). 2. The resolver according to claim 1, wherein a slit (12) is formed at a position near the first protrusion (10) along a longitudinal direction of the first protrusion (10). Rotor coil protection structure.