JPH06261480A - Coil end protective cap for motor - Google Patents

Abstract

PURPOSE:To enhance workability and safety and to reduce work process while achieving positive insulation by inserting a resin molded coil end protective cap between a stator frame and a winding and then trimming to predetermined dimensions. CONSTITUTION:A coil end protective cap 1 molded of highly dielectric resin is inserted into the stator frame 4 of a motor thus establishing insulation of motor while achieving compaction. Furthermore, a protrusion provided at the outer periphery on the bottom of the cap 1 is fit in a window (b) made through the stator frame 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-diameter electric motor and a small-output electric motor, and more particularly to a coil end insulating protection for electric motors, which facilitates reliable work and assembly of the electric motor windings.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a coil 3 is inserted into an iron core 2 and further inserted into a stator frame 4. A coil sleeve 9 is inserted into the insulation between the inserted coil 3 and the stator frame 4 so that the inner diameter of the stator frame 4 is guided. As a protection of the side surface of the coil 3, the coil end protection sleeve 10 is also attached to the stator frame 4.
Since the inner diameter of the coil is inserted as a guide, the winding of about φ0.1 mm spilled from the mating surface with the coil zipper 9, causing frequent failure of pressure resistance and lacking safety.

[0003]

In a small-diameter motor or a small-output motor, it is difficult to secure an insulation distance between the coil end and the stator frame, and an extremely thin wire of φ0.1 mm or less used for the small-output motor. In the work of this kind, it was difficult to stabilize the product and the workability was difficult by the conventional insulation treatment of the coil end as described above.

According to the present invention, in order to solve the above-mentioned problems, after inserting the iron core into the stator frame and inserting and fixing the coil end protection cap of the present invention, the process of thread binding is omitted and the coil end shaping process is performed. The purpose is to reduce the number of work processes, establish safety, facilitate work, and reduce costs by making it easier and more compact, and ensuring insulation and distance.

[0005]

[Means for Solving the Problems] In order to simultaneously perform the insulation distance of a small-diameter electric motor and a small-output electric motor and the shaping processing of the coil end, the coil is inserted into the iron core and then inserted into the stator frame, and the phenol with high insulation is inserted. By shaping the coil end protective cap made of resin or glass epoxy resin into the inner diameter of the stator frame, the coil end can be shaped.
The insulation treatment can be omitted.

Incidentally, the convex portion previously set on the coil end protection cap is fitted and fixed to the wind window set on the stator frame.

[0007]

[Operation] The insulation is strengthened and the coil end is shaped at the same time to secure the insulation distance of the small diameter electric motor and the small output electric motor. The conventional technique is improved so as to reduce the number of steps so as not to damage the winding.

According to the present invention, the coil end protective cap made of an insulating material having elasticity such as resin is inserted into the inner diameter of the stator frame after inserting the stator core into the stator frame and inserting the winding wire. By omitting the coil end shaping process and thread tying work, and fitting the protrusions installed beforehand on the coil end protection cap into the wind window of the stator frame to prevent slipping off, reliable insulation and the number of steps can be reduced. It is intended to secure safety by eliminating defects in withstand pressure due to scratches and wire spills around a winding diameter of φ0.1.

[0009]

Embodiments of the present invention will be described with reference to the drawings.

The present invention is an insulation protection device for a coil end of a small-diameter electric motor or a small-output electric motor which uses extremely thin windings.

A thin coil 3 is inserted into an iron core 2 shown in the sectional view of the main part of the electric motor of FIG. 1, and the inserted iron core 2 is inserted into a stator frame 4. However, the inserted coil 3 is unshaped because it is inserted by a machine or the like. Therefore, the coil end protection cap 1 is preliminarily set according to the volume amount of the coil 3, and the coil end protection cap 1 is guided between the stator frame 4 and the coil end by using the inner diameter of the stator frame 4 as a guide. To insert. The coil end protection cap 1 of the present invention has elasticity due to resin or the like,
In addition, since the coil end protection cap 1 is formed of an insulating material, the insulation between the stator frame 4 and the coil 3 and the insulation protection of the coil end side surface are ensured.

Further, several convex portions a provided on the outer diameter of the bottom portion of the coil end protection cap 1 are fitted into the wind window b portion provided on the stator frame 4 to prevent them from coming off and to be fixed.

Since the convex portion a is a protrusion, it can be easily removed by pushing it from the outer periphery of the stator frame 4, and can be repaired or remanufactured. In addition, the coil end housing portion Q of the coil end protection cap 1 is molded according to the volume amount of the coil end, so that insulation is strengthened to secure the insulation distance of a small-diameter electric motor and the stator winding is not damaged. Therefore, the conventional technology is improved so as to reduce the number of processes.

FIG. 2 shows the coil end protection cap 1 of the present invention. It is made by molding phenol resin or glass epoxy resin, which has high insulation properties. In addition, a coil end protection cap 1 made of an insulating material having elasticity such as resin is provided with an iron core 2 in which a coil 3 is previously inserted in a stator frame 4.
Is inserted into the inner diameter of the stator frame 4, the coil end shaping process and, of course, the thread tying work can be omitted, the safety is established, the workability is facilitated, and the cost is reduced.

[0015]

According to the present invention, 1. The size and diameter of the electric motor can be reduced, making it competitive.

2. It is possible to establish safety by ensuring the insulation and preventing the withstand voltage of the coil.

3. Cost reduction can be achieved by reducing the work process.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a coil end protection cap device according to the present invention.

FIG. 2 is a front view and a side view of the coil end protection cap of the present invention.

FIG. 3 is an external view of a motor of the coil end protection cap device of the present invention.

FIG. 4 is a sectional view of a main part of a conventional coil end protection cap device.

[Explanation of symbols]

1 ... Coil end protection cap, 2 ... Iron core, 3 ... Coil, 4 ... Stator frame, 5 ... Rotor, 6 ... Bracket, 7 ...
Shafts, 8 ... Ball bearings, 9 ... Coil fittings, 10 ... Coil end protecting fittings, a ... Several convex portions, b ... Stator frame wind window, Q ... Coil end housing.

Claims (1)

[Claims] 1. A structure in which it is difficult to secure an insulation distance between a motor winding and a stator frame, or a motor using an extremely thin wire type of the motor winding, the insulation is adjusted according to the volume of the coil end of the motor. A few coil end protection caps made of high phenolic resin or glass epoxy resin are inserted into the inner diameter of the stator frame so as to wrap the coil end, and the wind window provided in the stator frame that has been installed in advance is installed at the bottom of the protective cap. A coil end protection cap for an electric motor, characterized in that the convex part of the cap is used as a stopper using the elastic force of the insulating material.