JP2002262502A - Stator for slot-less motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator for a slot-less motor eliminating a positional deviation and deformation of a coil and having good productivity. SOLUTION: This stator for the step-less motor is constituted by mounting an air-core coil 6 concentratedly wound to the internal peripheral surface of a stator core 9, and molding or impregnating the coil and stator core with a resin 10, the internal peripheral part of the stator core 9 inserts an insulator 1 secured for coil positioning having a coil positioning protrusion part 3 in an external peripheral surface, further having a coil lead wire fixing part 4 and a wire connection base board positioning part 5 in its end part, composed of a resin-made thin thickness cylinder unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a stator of a slotless motor.

[0002]

2. Description of the Related Art In a conventional slotless motor,
The stator is configured as follows. First, after positioning the air-core coil with a jig (not shown), the coil is bonded to the inner peripheral surface of the stator core using a thin adhesive sheet. Next, using a jig (not shown), the connection board is fixed at the non-load side of the stator core and the coil. Further, after the lead wire of the coil is manually fixed to the connection substrate, molding is performed with resin. Alternatively, impregnation with a resin is performed.

[0003]

However, in such a conventional slotless motor stator,
There were the following problems. (1) Since the bonding surface between the coil and the stator core is only on the side surface of the coil, the coil is misaligned or deformed due to softening of the fusion layer during high-temperature and high-pressure molding. (2) The bonding process and the work of fixing the connection substrate and the lead wire of the coil take time, resulting in poor stator productivity. The present invention has been made to solve such a problem, and an object of the present invention is to provide a stator of a slotless motor which is free from displacement and deformation of a coil and has good productivity.

[0004]

In order to solve the above-mentioned problems, the present invention comprises mounting an air-core coil wound concentratedly on the inner peripheral surface of a stator core, and molding or impregnating them with a resin. In the stator of the slotless motor, the inner peripheral portion of the stator core is formed of a thin cylindrical body made of resin, has a coil positioning protrusion on the outer peripheral surface, and has a coil lead wire fixing portion and a connection board positioning portion at the end. And an insulator for positioning the coil having the above structure is inserted and fixed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an insulator in an embodiment of the present invention, FIG. 2 is an exploded perspective view of a stator showing an embodiment of the present invention, and FIG. 3 is a perspective view showing a stator of the present invention. As shown in FIG. 1, an insulator 1 of the present invention includes a thin cylindrical portion 2, a coil positioning protrusion 3 provided on an outer peripheral surface of the thin cylindrical portion 2, and a thin cylindrical portion 2.
Are formed by a coil lead wire fixing portion 4 and a connection board positioning portion 5 provided at the end of the wire. The assembly of the stator S of the present invention is performed as follows. As shown in FIG. 2, first, a center hole (air core portion) of the air-core coil 6 is provided in the coil positioning projection 3 of the insulator 1.
6a is fitted. Thereby, the positioning of the coil 6 is performed. Next, the lead wire 7 of the coil 6 is fitted into the coil lead wire fixing part 4. Thus, the lead wire 7 of the coil 6 is positioned. Next, the connection board 8 is placed on the connection board positioning section 5 such that a land (not shown) of the connection board 8 is fitted to the lead wire 7 of the coil 6 already positioned. Then, the insulator 1 is inserted into the inner peripheral portion of the stator core 9. Thereafter, molding is performed with the resin 10 except for the outer peripheral surface of the stator core 9. Alternatively, the resin 10 is impregnated. By doing so, the positioning of the coil 6, the lead wire 7, and the connection board 8 is easily performed. Further, the coil positioning protrusion 3 has the coil 6
The center hole 6a is fitted to fix the coil 6, so that displacement and deformation of the coil 6 due to mold resin pressure are suppressed. Further, in addition to the easiness of positioning of the coil 6 and the lead wire 7, the productivity of the stator S is greatly improved because no bonding step is involved.

[0006]

As described above, the present invention has the following effects. (1) Since the coil 6 is fixed by fitting the center hole 6a of the coil 6 into the coil positioning projection 3, displacement and deformation of the coil 6 due to mold resin pressure can be suppressed. (2) The positioning of the air core coil 6, the lead wire 7 of the coil, and the connection board 8 can be easily performed. (3) In addition to the above (1) and (2), since no bonding step is involved, the productivity of the stator S can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an insulator according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a stator showing an embodiment of the present invention.

FIG. 3 is a perspective view showing a stator of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulator, 2 Thin cylindrical part, 3 Coil positioning protrusion, 4 Coil lead wire fixing part, 5 Connection board positioning part, 6 Air core coil, 6a Central hole, 7 Lead wire, 8 Connection board, 9 Stator core, 10 Resin , S Stator

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 15/12 H02K 15/12 D

Claims (1)

[Claims] 1. A stator of a slotless motor obtained by mounting an air-core coil concentratedly wound on an inner peripheral surface of a stator core and molding or impregnating the core with a resin, wherein: It is made of a thin resin cylinder and has a coil positioning projection on the outer peripheral surface,
A stator for a slotless motor, wherein an insulator for coil positioning having a coil lead wire fixing part and a connection board positioning part at an end is inserted and fixed.