JPH0119581Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an internal wiring holding mechanism for an electric motor.

Conventionally, the common method of ensuring that internal wiring does not come in contact with the rotor is to strictly control the length of internal wiring when manufacturing parts, and to prevent internal wiring from coming into contact with the rotor when assembling the product. They took great care in assembling the product, and a lot of effort was spent on its management.

An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a simple and inexpensive internal wiring holding mechanism.

In electric motors whose outer frame is made of conductive material such as aluminum, an insulating strip is used to prevent the terminal that connects the end of the field winding of the stator to the brush holder from coming into contact with the outer frame. Focusing on the fact that a top plate is provided, the stop plate is formed into a U-shape, and internal wiring is arranged in the space formed between the outer periphery of the protrusion of the stop plate and the inner periphery of the outer frame. It is designed to maintain the same settings.

An embodiment of the present invention is shown in FIGS. 1 and 2. In the figure, a stator 3, a bearing 5, and a brush holder 7 are held and attached to two divided outer frames 1 and 2, respectively. The rotor 4 is held by a bearing 5. Electric brushes 6, 6 are slidably housed in the brush holders 7, 7, which are 180 degrees apart from each other.
One end of the field winding wound around the stator 3 is connected to the brush holder 7 by the first internal wiring 8, 8, and one end of the field winding is connected to the first internal wiring 8, 8, the electric brush 6,
6 and one end of the armature winding via a commutator 10. 15 is a terminal that connects one end of the first internal wiring 8, 8 to the brush holder 7, 7. Reference numerals 11 and 11 designate second internal wiring that connects the other end of the field winding to the power source.

Reference numeral 9 designates a one-piece stop plate made of an insulating material and having a substantially U-shaped side surface. This stop plate 9 has parallel stop plate portions 1 fixed to the brush holders 7, 7 and interposed between the terminals 15, 15 and the inner walls of the outer frames 1, 2, respectively.
4, 14, and a parallel extension portion 1 extending one side of the stop plate portions 14, 14 toward the inner wall of the outer frame 1.
6 and 16, and a connecting portion 13 forming a narrow space 12 between the extension portions 16 and the inner wall of the outer frame 1 to which the ends of the extension portions 16 and 16 are connected. Internal wirings 8, 8 and 11, 11 are arranged and held within the space 12, and the internal wirings are held at a position away from the rotor 4.

As mentioned above, in this invention, the internal wiring is arranged and held in a space formed far from the rotor, so the internal wiring does not come into contact with the rotor, and the internal wiring is Severe management and attention during assembly are not required, and labor can be reduced. Further, the stop plate has the advantage that it has a simple structure and can be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a sectional view taken along the line A-A in Figure 1. 1, 2 are outer frames, 3 are stators, 4 are rotors, 7 are brush holders, 8, 8 are first internal wirings, 9 are stop plates, 11, 11 are second internal wirings, 1
2 is a void, 13 is a connecting portion, 14 is a stop plate portion, 15 is a terminal, and 16 is an extension portion.

Claims (1)

[Scope of utility model registration request] A field winding wound around a stator held by an outer frame, an armature winding wound around a rotor held by a bearing fitted into the outer frame, and an armature winding attached to the outer frame. a pair of brush holders that are arranged at 180° offset positions with an electric brush inside; a first internal wiring that connects one end of the field winding to the brush holder via a terminal; A motor having a second internal wiring that connects the other end of the winding to a power source, and a stop plate that is fixed to the brush holder and prevents the terminal from contacting the outer frame, wherein the stop plate from two stop plate parts spaced apart from each other, parallel extension parts extending from each of the stop plate parts, and a connecting part connecting the ends of the two extension parts. The stop plate is arranged inside the outer frame by locking both the stop plate parts to the brush holder, and the outer periphery of the connecting part and the inside of the outer frame are connected to each other. 1. An internal wiring holding mechanism for an electric motor, characterized in that both the first and second internal wirings are disposed within a space formed between the periphery and the periphery.