JPH089598A - Structure of lead wire connection part of motor for electrical equipment - Google Patents

Abstract

PURPOSE:To connect a lead wire to a lead wire connection made at a spring holder without putting the lead wire in forcible posture. CONSTITUTION:This is structure of the lead wire connection part of a motor for electrical equipment where, at a spring holder 12, a plate-shaped piece 12b is projected toward the side of a lead wire support 14 from a spring slip out stopper 12a, and a cut is made in axial direction in the plate-shaped piece 12b, and a lead wire connection part 12c is made by bending the section so as to be roughly parallel with a stay member 7 toward the axis side, and in the lead wire connection part 12c, the tip of a pigtail head 10a and the tip 13 of the lead wire pulled in toward the axis side from the lead wire support 14 are connected with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead wire connecting portion structure for an electric motor mounted on vehicles such as passenger cars, buses, trucks and motorcycles.

[0002]

BACKGROUND OF THE INVENTION Generally,
In some of the motors for this kind of electrical equipment, a stay member supported in the opening of the motor yoke is integrally formed with a cylindrical brush holder in which a pair of brushes slidably contacting a commutator are housed and held so as to be retractable. In this case, the electrical connection between the lead wire for external drawing and the pigtail protruding from the brush is integrally formed with the spring holder for preventing the brush urging ammunition housed in the brush holder from coming off. May be done at the connection.

As such a structure, a structure as shown in FIG. 4 is known. In this structure, a lead wire 13 is penetratingly supported by a stay member 7 integrally formed with a pair of brush holders 8 and 9. The lead wire support portion (rubber grommet) 14 and the spring holder 12 are provided, and the tip end portion of the lead wire 13 is soldered to the lead wire connection portion 12d protruding toward the lead wire support portion 14 side of the spring holder 12. It was electrically connected by means of. However, in this structure, the plate surface of the lead wire connecting portion 12d is in a state of being orthogonal to the bottom surface portion 7a of the stay member 7, so that the lead penetrating the lead wire supporting portion 14 and drawn into the yoke. The wire 13 has its lead-in position and the lead wire connecting portion 1
When the distance A from 2d is short, the lead wire 13 is forcibly bent into a corner shape, and this bending load is received by the lead wire through hole portion of the lead wire support portion 14, The change over time of the lead wire support is promoted,
There is a problem that the support characteristic and the waterproof characteristic of the lead wire 13 are impaired. Moreover, the tip of the pigtail 10a protruding from the brush 10 needs to be further electrically connected to the spring holder 12, but the pigtail 10a is connected to the lead wire connecting portion 12d in parallel with the lead wire 13 in the motor axial direction. When connected so that confirmation of the connection state of the wires 10a and 13 (lead wires or pigtails) connected to the lead wire connecting portion 12d on the stay member bottom surface portion 7a side is hindered by the wire connected to the front side However, there is a problem that it is difficult to confirm. Therefore, FIG.
As shown in FIG. 1, the pigtail connecting portion 1 is provided on the side opposite to the side where the lead wire connecting portion 12d of the spring holder 12 is formed.
Although 2e is formed to project and the pigtail 10a is connected thereto, this has a problem in that the spring holder 12 becomes large due to the formation of the pigtail connecting portion 12e.

[0004]

SUMMARY OF THE INVENTION The present invention was conceived with the object of providing a lead wire connecting portion structure for an electric motor which can eliminate these drawbacks in view of the above circumstances. A stay member integrally formed on the bottom surface with a cylindrical brush holder that retractably accommodates and holds a pair of brushes slidably contacting the commutator, and a lead wire support portion through which a lead wire for external withdrawal is supported. A plate-shaped spring holder for preventing the brush urging ammunition from being installed inside the brush holder, and a pigtail projecting from the brush and the lead wire at a lead wire connecting portion integrally formed with the spring holder. When electrically connecting the respective tip portions of the lead wire connecting portion and the lead wire connecting portion, the plate-like piece projecting from the ammunition retaining portion toward the lead wire supporting portion side becomes a plane parallel to the stay member bottom surface portion. Occasion It is characterized in being formed by.

According to the present invention, the lead wire can be connected to the spring holder without forcibly bending the lead wire.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes an electric motor mounted on a vehicle. The electric motor 1 houses a motor shaft 2, a rotor 3 integrally provided on the motor shaft 2, a commutator 4, and each of these members. The motor yoke 5 and the permanent magnets 6 provided on the inner peripheral surface of the motor yoke 5 are used, and these members are conventional.

Reference numeral 7 denotes a stay member 7 supported by the opening of the motor yoke 5. The stay member 7 is molded from a resin material or the like, and a bottom surface portion 7a has a pair of cylindrical shapes. The first and second brush holders 8 and 9 are integrally formed. Then, the commutator 4 of the motor shaft 2 is housed and held in the first and second brush holders 8 and 9 so as to be retractable and retractable.
The brushes 10 that are in sliding contact with each other are urged by the brush urging ammunition 11 toward the two axes of the motor shafts. Each of the first and second brush holders 8 and 9 is structured so as to be locked in a slip-out preventive manner by a plate-shaped spring holder 12 which will be described later and which is provided at the outer diameter side end portions.

On the other hand, the stay member 7 is integrally connected to a pigtail 10a protruding from the brush 10 and integrally with a lead wire support portion 14 made of a rubber grommet through which a lead wire 13 drawn out is supported. Although formed, the lead wire support portion 14 is provided on one brush holder, in the present embodiment, in order to avoid the through bolt through hole 5a provided in the motor yoke 5 for mounting the electric component motor 1 on the vehicle. It is provided on the stay member 7 in a state of being biased toward the first brush holder 8 side. Then, the lead wire support portion 1
The lead wire 13 that has entered the electric component motor 1 from 4 is
It is adapted to be electrically connected to the pigtail 10a via a spring holder 12 which holds and supports the urging ammunition 11.

That is, the spring holder 12 is formed of a conductive plate-like member, and has a bullet-stopping portion 12a for preventing and supporting the biasing bullet 11 for biasing the brush 10, and the bullet-proofing machine. It is composed of a plate-shaped piece 12b projecting from the retaining portion 12a toward the lead wire support portion 14 side, and a cut C in the direction of the motor shaft 2 is formed in the plate-shaped piece 12b, and the stay C is formed at the cut C portion. The lead wire connecting portion 12c is formed by bending toward the axis of the motor shaft 2 until it becomes substantially parallel to the bottom surface portion 7a of the member 7. In this case, the depth of the notch C of the lead wire connecting portion 12c is set to be approximately half the plate width of the plate-shaped piece 12b, and when assembled in the first and second brush holders 8 and 9, respectively. By assembling the holders 12 in opposite directions, it is considered that the lead wire connecting portion 12c faces the lead wire supporting portion 14 side, and the members can be commonly used. Further, the plate surface position of the lead wire connecting portion 12c from the bottom surface portion 7a is set to substantially match the lead wire 13 supporting position of the lead wire supporting portion 14. The spring holder 12 on the side of the first brush holder 8 has a plate-like piece 12
b is set so as to reach the lead wire support portion 14, and the lead wire on the side of the first brush holder 8 is drawn from the lead wire support portion 14 toward the shaft core side in the lead wire connection portion 12c. 13 can be connected in a substantially retracted position. On the other hand, on the second brush holder 9 side, the drawn lead wire 13 is connected to the lead wire connecting portion 12c in a state of being gently curved. Then, on the surface of the lead wire connecting portion 12c, the lead wire 13 and the tip end portion of the pigtail 10a are respectively connected by connecting means such as soldering, whereby the corresponding lead wire 13 and the pigtail 10a can be electrically connected. Is configured.

In the embodiment of the present invention constructed as described above, the pigtails 10 of each brush 10 housed in the first and second brush holders 8 and 9 and elastically pressed by the commutator 4.
In the lead wire connecting portion 12c formed on the spring holder 12, the tip end a is electrically connected to the tip end portion of the corresponding lead wire 13 for external drawing. Since the motor 7 is bent toward the axis of the motor shaft 2 so as to be substantially parallel to the bottom surface 7a of the member 7, the distance between the lead wire support portion 14 and the lead wire connecting portion 12c is the axial direction. Not only when it is long, but also when it is short, the lead wire 13 drawn toward the shaft core side can be connected reasonably, and the lead wire connecting portion is orthogonal to the bottom surface portion of the stay member. It is possible to reliably avoid forcibly bending and connecting the lead wire 13 drawn toward the shaft core side toward the outer diameter side unlike the conventional one. Moreover, in this one, the lead wire connecting portion 12c
Since the plate surface position from the bottom surface portion 7a of the lead wire substantially coincides with the support position of the lead wire 13 of the lead wire support portion 14, the lead wire support portion 14 is only subjected to a bending load to the outer diameter side of the lead wire 13. Without bending load in the axial direction, the durability of the lead wire support portion 14 can be further improved.

In addition, in the present embodiment, the lead wire connecting portion 12c on the first brush holder 8 side, which is close to the lead wire supporting portion 14, is arranged on the axial core side of the lead wire supporting portion 14. Therefore, the corresponding lead wire 13 is to be connected to the lead wire connecting portion 12c with the posture in which the lead wire 13 penetrates the lead wire supporting portion 14 and is drawn toward the shaft core side.
Furthermore, the lead wire support portion 14 can be protected, the durability can be improved without impairing the waterproof property of the portion, and the connection portion of each wire on the lead wire connection portion 12c can be protected.

Further, in this structure, the lead wire connecting portion 12c, which is parallel to the bottom surface portion 7a of the stay member 7, is
Since the pigtail 10a and the lead wire 13 are connected, it is possible to directly check the connection state of the pigtail 10a and the lead wire 13 with the spring holder 12 assembled in the stay member 7, and it is possible to check the connection failure. It is easy to determine the presence or absence of the like, and it is not necessary to separately provide a pigtail connecting portion in the bullet holding device in addition to the lead wire connecting portion as in the conventional case, which contributes to the reduction in size and weight.

[0013]

In summary, since the present invention is constructed as described above, the lead wire connecting portion for electrically connecting the pigtail tip portion and the lead wire tip portion is projected from the spring holder. Since it is bent so as to be substantially parallel to the bottom surface of the stay member, even when the distance between the lead wire support portion and the lead wire connection portion is small,
Lead wires can be connected in a corner without large bending. As a result, the bending load of the lead wire does not act on the lead wire supporting portion, the durability can be improved without impairing the waterproof property of the lead wire supporting portion, and the connection of each wire in the lead wire connecting portion can be achieved. The department itself can be protected. Furthermore, the lead wire connecting portion is a surface substantially parallel to the bottom surface portion of the stay member, and the connection state of the two wires can be visually checked as it is when the spring holder is assembled in the stay member. As described above, it is not necessary to form the pigtail connecting portion separately from the lead wire connecting portion provided in the bullet holding-out portion, and it is possible to contribute to downsizing and weight reduction by using common members.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of an electric motor.

FIG. 2 is a front view of a main part.

FIG. 3 (X) is a perspective view of a spring holder provided in the first brush holder, and FIG. 3 (Y) is a perspective view of a spring holder provided in the second brush holder.

FIG. 4 is a front view of a main part of a conventional example.

[Explanation of symbols]

 1 Motor for Electrical Equipment 2 Motor Shaft 4 Commutator 6 Stay Member 7a Bottom Part 8 First Brush Holder 10 Brush 10a Pigtail 11 Brush Energizer 12 Spring Holder 12a Bullet Stopper 12b Plate-like Piece 12c Lead Wire Connection 13 Lead wire 14 Lead wire support C Cut

Claims (4)

[Claims] 1. A lead wire in which a lead wire for external drawing is pierced and supported by a stay member integrally formed with a bottom surface of a cylindrical brush holder for accommodating and holding a pair of brushes slidably contacting a commutator. A support portion and a plate-shaped spring holder for preventing the brush urging ammunition from being installed inside the brush holder are provided, and a lead wire connecting portion integrally formed with the spring holder has a pigtail protruding from the brush. When electrically connecting the respective tip portions to the lead wires, the lead wire connecting portion is a plate-like piece projecting from the ammunition retaining portion toward the lead wire supporting portion side and is parallel to the stay member bottom surface portion. A lead wire connecting portion structure of an electric motor, wherein the lead wire connecting portion structure is formed by bending so as to become 2. The lead wire connecting portion according to claim 1,
A lead wire connection structure for an electric motor, which is formed by bending a plate-shaped piece cut in the axial direction. 3. A lead wire connecting portion structure for an electric motor according to claim 2, wherein the cut depth of the plate-shaped piece is approximately half the plate width. 4. The lead wire connecting portion structure for an electric motor according to claim 1, 2 or 3, wherein the lead wire supporting portion is biased to one brush holder side.