JPS62293957A - Manufacture of armature - Google Patents

Abstract

PURPOSE:To prevent lead wires from being shorted even if bare sections are generated on the lead wire sections, by fitting a ring having insulating salient pieces inserted between adjacent respective hook-formed connecting pieces, on a commutator. CONSTITUTION:On the side surface periphery of a main unit 1, commutator segments 2 are arranged and a commutator C with bent formed connecting pieces 3 in hook shapes is set. The small loops 10a of lead wires 10 on windings are wound on the connecting pieces 3, and after that, they are electrically connected to each other by fusing. After that, on the outer periphery of the connecting piece 3 group, an insulating ring 5 is fitted, and salient pieces 6 on the inner periphery of the ring 5 are inserted between the adjacent connecting pieces 3, along the side peripheral surface of the commutator C. As a result, the small loops 10a are brought near the respective connecting piece 3 sides by the salient pieces 6 and are separated from each other, and so the small loops 10a are kept insulated from each other.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a method of manufacturing an armature used in a DC motor such as a flat motor.

Regarding the armature of the conventional technology flat motor, Utility Model Application No. 56-101)
A commutator known from Publication No. 81, Japanese Utility Model Application Publication No. 60-1) No. 657, etc. is used. This type of commutator has commutator segments arranged on the outer surface of the main body, and the hook-shaped connecting pieces of each commutator segment are arranged adjacently in a ring shape.

FIG. 4 shows an example of a conventional armature in a flat morph using one such commutator. Commutator a is located at the center of a group of windings arranged in a ring,
A lead wire C of each winding is connected to each hook-shaped connecting piece e of adjacent commutator segments d arranged in a ring shape. In this connection, for example, the connecting wire between the windings ■ and ■ that are formed continuously is a lead wire C, and a small loop f formed in the middle of the lead wire C is wound around a hook-shaped connecting piece e. This is done by hanging and fusing. After fusing, each lead wire C is fixed to the commutator a by molding using a thermosetting resin.

Problems to be Solved by the Invention However, in the conventional method for connecting the lead wire C and the hook-shaped connecting pieces e, since the hook-shaped connecting pieces e arranged in a ring are close to each other, , there is a problem that adjacent lead wires C tend to come into contact with each other. If the small loop f wraps around the contact part and there is a bare part due to destruction of the coating during work or fusing work, it will be electrically connected, and it will be fixed in a shorted state during the next molding process. In order to solve the above-mentioned problems, the present invention provides a method for solving the problem that the quality of the product may be poor and the yield is reduced. Each lead wire of the winding arranged around the commutator is wound around each hook-shaped connection piece of the commutator segments arranged in a ring, the hook-shaped connection piece and the lead wire are electrically connected by fusing, and then In a method of manufacturing an armature by fixing each lead wire to a commutator by molding, in the process between fusing and molding, an insulating protrusion is inserted between each adjacent hook-shaped connection piece. By attaching the ring to the commutator, each insulating projecting piece is inserted between adjacent portions of the lead wire wrapped around each hook-shaped connecting piece.

According to the present invention, by attaching the ring to the commutator after the fusing process and before the molding process, an insulating layer is formed between adjacent parts of the lead wires connected to each hook-shaped connection piece of the commutator. A protrusion can be inserted to insulate adjacent lead wires. Therefore, during the fusing process, even if the adjacent lead wires are shorted due to insulation damage, the lead wires can be Before molding to be fixed to a commutator, the short-circuit condition is corrected by attaching the ring.

Embodiment In the embodiment of the present invention shown in FIGS. 1 to 3, commutator segments 2 are disposed on the side peripheral surface of a sleeve-shaped main body l made of synthetic resin, and a commutator segment 2 is provided at one end of each commutator segment 2. The present invention also relates to a method of manufacturing an armature equipped with a commutator C in which a hook-shaped connection piece 3 having a small width is bent.

The hook-shaped connecting pieces 3 of the commitake C are arranged adjacent to each other at equal intervals in a ring shape. A winding 9 is arranged around the commutator C, and the lead wire 10 of the winding 9 is wound around the hook-shaped connecting piece 3 with a small loop 10a in the middle thereof, and the small loop 10a is connected to the hook-shaped connecting piece 3 by fusing. Connect to the target. At this time, since the adjacent hook-shaped connecting pieces 3 are close to each other, the small loops 10a wrapped around each hook-shaped connecting piece 3 are in close proximity to the adjacent small loops 10a, and some of them are in contact with each other. There are some things. If the winding is exposed at the contact portion due to breakage of the coating during work or fusing work, the small loops 10a will be electrically connected, resulting in a short circuit between the small loops 10a.

FIG. 3 shows an insulating ring 5 made of synthetic resin used in this embodiment. This ring 5 has an inner diameter slightly smaller than the outer diameter of the 3 groups of hook-shaped connecting pieces, and has the same number of protruding pieces 6 as the connecting pieces 3 integrally formed on its inner periphery at equal intervals.

After fusing is completed, the ring 5 is assembled into the commutator C in the direction of the arrow in FIG. 2, and the ring 5 is attached to the outer periphery of the three groups of hook-shaped connecting pieces. Accordingly, the protruding pieces 6 on the inner circumference of the ring 5 are inserted along the side circumferential surface of the commutator C between adjacent hook-shaped connecting pieces 3.3 as shown in FIG. By inserting the projecting piece 6, the small loops 10a, 10a of the connecting pieces 3.3 on both sides are brought to the side of the respective connecting pieces 3, 3, so that the small loops 10a that are in contact or in a close state
, 10a are separated from each other, and since the ring 5 is made of synthetic resin with excellent insulation, the small loops fOa separated by the protrusion 6 are insulated from each other.

The commutator C with the ring 5 attached thereto is integrally covered and fixed to the commutator C by molding using a thermosetting insulating resin so that the winding 9, the lead wire IO, and the surroundings of the ring 5 are fixed to the commutator C, and the small loop 10a is fixed to the commutator C. The insulation state between them is maintained.

Effects of the Invention According to the present invention, the ring can be attached to the commutator even if the lead wires wound around each hook-shaped connection piece are short-circuited between adjacent parts during the intermediate process of armature manufacturing. Since the short-circuit condition can be corrected by this method, and the lead wires are insulated during molding, the quality of the armature manufactured by the method of the present invention is improved, and the yield is significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional plan view showing a commutator portion of an example of an armature manufactured by the method of the present invention, FIG. 2 is a longitudinal cross-sectional front view of the entire armature, and FIG. FIG. 4 is a perspective view of an example of a conventional armature. 2−−−−−−−−・−・−・−・−・・・・−−−−
−−・Commitator segment 3−・−・・・−・
−・・・・・−・−・−・−・−Hook-shaped connection piece 5・・
・・−・−・−・−１−−−・−・−・−・−−−
−1・・−・Ring 6・−・−−−−−・・・・−・−
−1−−−−−・−−−−−−−−−1・Protrusion 9−・−
−−１−−−−−−−−−−−−−・−・・−・−・−
・−・Winding 10・−・−・−・・−・−・−・−m−～
・・・・−・−・−Lead wire C−・・−・・−・・−・
−・−・−・・−・−・−・−・Commitator. Agent Me 6 Patent Attorney Toshio Nakao 1 person version (Co.

Claims (1)

[Claims] (1) Wrap each lead wire of the winding arranged around the commutator around each hook-shaped connection piece of the commutator segment arranged in a ring around the outer circumference of the commutator, and connect the hook-shaped connection piece and the lead wire by fusing. In a method of manufacturing an armature by electrically connecting the leads and then fixing each lead wire to a commutator by molding, the wires are inserted between adjacent hook-shaped connecting pieces in the process between fusing and molding. By attaching a ring having insulating protruding pieces to the commutator, each insulating protruding piece is inserted between adjacent parts of the lead wire wrapped around each hook-shaped connecting piece. A method of manufacturing an armature.