JPH0127408Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a stator for an electric motor in which the structure of the lead wire lead-out portion is improved.

(Prior art) Conventionally, the structure for leading out lead wires from the stator of an electric motor is to connect the lead wires to the magnet wires of the stator coils, and to connect the lead wires with, for example, varnish tubes with excellent wear resistance and heat resistance. A common configuration is to bundle the leads and insert them into lead wire insertion holes formed in the motor bracket.

(Problem to be solved by the invention) However, in the above configuration, since the varnish tube is relatively hard, when an external force is applied to the lead wire, the end of the varnish tube rubs against the coil end of the stator coil, which causes the coil end portion to rub. The insulation coating of the magnet wire was sometimes torn or disconnected.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a stator for an electric motor that can prevent the insulation coating of the stator coil at the portion rubbed against the varnish tube from being torn or disconnected.

[Structure of the invention] (Means for solving the problem) In order to achieve the above object, the stator of the electric motor of the present invention is a stator of the electric motor arranged in the motor bracket, and the stator is installed in the slot of the stator core. A plurality of lead wires are passed inside the slot insulating paper arranged so as to surround the coil, and the end of the lead wire led out from one end of the slot insulating paper is connected to the magnet of the stator coil. In addition to connecting to the wire, a tube for bundling the lead wire is placed on the side led out from the other end of the slot insulating paper, and the lead wire is inserted together with the tube into the lead wire insertion hole formed in the motor bracket. In the device for insertion, a protective piece with a guide hole formed in the other end of the slot insulating paper is integrally formed and extended, and a portion of the lead wire to be covered with the tube is inserted into the guide hole. The protective piece is inserted between the end of the tube and the stator coil by being inserted through the slot insulating paper and led out from the inside to the outside.

(Function) Since the protective piece is interposed between the end of the tube and the stator coil, the stator coil is not rubbed by the end of the tube. In this case, the lead wire is inserted through the hole in the protective piece, and the range of movement is restricted by the hole, so the end of the tube does not come off the protective piece and the stator Damage to the coil can be more reliably prevented.

Furthermore, since the protective piece is integrated with the slot insulating paper, the number of parts does not increase, and the stator coil can be prevented from being damaged at low cost.

(Example) An example of the present invention will be described below with reference to the drawings.

1 is a motor bracket, 2 is a stator disposed within the motor bracket 1, and this stator 2 has stator coils 6 inserted into a number of slots 4 formed in a stator core 3 through slot insulating paper 5 serving as an insulating member. It consists of This stator coil 6 consists of a main coil 6a and an auxiliary coil 6b, and the coil ends of both coils 6a and 6b are insulated by interlayer insulating paper 7, which is an insulating member. 8 is a binding thread that prevents each stator coil 6 from fraying. Reference numeral 9 denotes a plurality of lead wires, which are inserted into the inside of the slot insulating paper 5 arranged in the slot 4 so as to surround the stator coil 6. One end led out from the right end (in the figure) is connected to the magnet wire of the stator coil 6. By arranging the lead wire 9 in the slot insulating paper 5 together with the stator coil 6 in this manner, the lead wire 9 can be fixed, making it easy to connect the lead wire 9 and the magnet wire. In addition, even if an external force is applied to the lead wire 9, the force will not be applied to the connection portion with the magnet wire. Reference numeral 10 denotes a tube, which is placed over almost the entire side of the lead wires 9 led out from the other end (the left end in FIG. 3) of the slot insulating paper 5, and binds the plurality of lead wires 9 together. ing. The other end of the nine groups of lead wires bound by one tube 10 in this way is
The tube 10 and the lead wire are inserted into a lead wire insertion hole 11 formed in the motor bracket 1 and led out from the motor bracket 1. 12 is a connector provided at the other end of the lead wire 9.
The tube 10 is made of a heat-resistant and abrasion-resistant varnish tube to protect the lead wire 9 from the edges around the lead wire insertion hole 10.

Reference numeral 13 designates a protective piece extending integrally from the other end of the slot insulating paper 5, which includes a through hole 1.
4 is formed. Then, the portion of the lead wire 9 covered with the tube 10 is inserted into the through hole 14 so as to lead out from the inside of the slot insulating paper 5 to the outside. As a result, the protective piece 13 is interposed between the stator coil 6 and the end of the tube 10 placed over the lead wire 9 on the side connected to the magnet wire.

According to the above configuration, when connecting the connector 12 to the connector receiver, the lead wire 9 is moved and the end of the tube 10 is rubbed against the stator coil 6 side, or the stator coil is damaged due to vibrations caused by motor operation. Even if the 6 side and the end of the tube 10 start to rub against each other, the stator coil 6
Since the protective piece 13 is interposed between the stator coil 6 and the tube 10, the stator coil 6 will not be directly rubbed against the hard edge of the tube 10, and the magnet wire of the stator coil 6 will not be disconnected. It is possible to prevent a situation in which the insulation coating is torn. Moreover, since the lead wire 9 is inserted through the through hole 14, the lateral movement of the lead wire 9 is prevented from occurring in the through hole 14.
Therefore, even if the end of the tube 10 is not tied to the stator coil 6 with the binding thread 8, the end of the tube 10 can be removed from the protective piece 13 and directly attached to the stator coil 6.
There is no risk that the stator coil 6 will be rubbed against the stator coil 6, and damage to the stator coil 6 can be more reliably prevented. Furthermore, since the protective piece 13 is integrated with the slot insulating paper 5, the number of parts does not increase and the structure can be made at low cost.

[Effects of the invention] As described above, the protective piece prevents the tube that binds the lead wires from being rubbed directly against the stator coil. It is possible to prevent the occurrence of a situation such as a breakage. Moreover, the lead wire is passed through the through hole in the protective piece, and the range of displacement is restricted by the through hole, so the end of the tube is protected without having to tie the end of the tube to the stator coil. There is no risk of it coming off from one part, and damage to the stator coil can be more reliably prevented. Furthermore, since the protective piece is integrated with the slot insulating paper, the number of parts is not increased, and the stator of the electric motor has excellent effects such as preventing damage to the stator coil at a low cost. obtain.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an enlarged perspective view of the main parts, FIG. 2 is an enlarged perspective view of the slot insulating paper, and FIG. 3 is a longitudinal sectional view of the entire electric motor. In the figure, 1 is the motor bracket, 2 is the stator,
5 is a slot insulating paper, 6 is a stator coil, 9 is a lead wire, 10 is a tube, 13 is a protective piece, 1
4 is a through hole.

Claims (1)

[Scope of utility model registration request] A plurality of lead wires are passed inside slot insulating paper, which is a stator of an electric motor disposed in a motor bracket, and which is arranged in a slot of a stator core so as to surround a stator coil. The end of the slot insulating paper on the side led out from one end is connected to the magnet wire of the stator coil, and the side led out from the other end of the slot insulating paper is covered with a tube for bundling the lead wires. The lead wire is inserted into a lead wire insertion hole formed in the motor bracket together with the tube,
A protective piece with a guide hole formed in the other end of the slot insulating paper is integrally formed to extend, and a portion of the lead wire that covers the tube is inserted through the guide hole and inserted inside the slot insulating paper. A stator for an electric motor, characterized in that the protective piece is interposed between an end of the tube and the stator coil by leading outward from the tube.