JP2001157413A - Power supply brush device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply brush device which can execute the shut off of the rear of a box wherein a power supply brush is installed, in one operation without transforming the box. SOLUTION: A power supply brush device 10 is equipped with power supply brushes 20, springs 30 which energize those power supply brushes 20 inward from the rear, and a power supply brush holding board 40 which is equipped with boxes 42 where inside installation holes 42a in which to install the said power supply brushes 20 and the said springs 30 are made, and for each of the said boxes 42, the top on the side of the rear end, being the inside installation part of the said spring 30 of the said inside installation hole 42a, and the rear end part are open, and the said top on the side of the rear end and the rear end part are shut off by fixing a shut off member 50, which has a shut off piece 52 for the top on the side of rear end and a rear end shut off piece 54 to shut off that top on the rear end side and that rear end part, to the said power supply brush holder 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor provided with an armature having a commutator, and more particularly, to a power supply brush device holding a power supply brush for contacting the commutator and supplying power to the armature. .

[0002]

2. Description of the Related Art Conventionally, a power supply brush device for holding a power supply brush generally has a metal power supply brush insertion box fixed on an insulating substrate. In this configuration, after inserting the power supply brush into the interior hole of the box, and then inserting a spring for urging the power supply brush toward the inner diameter side, the closing plate integrally formed on the rear portion of one side wall of the box is bent to form the rear portion of the box. It was closed. However, for example, at present, when noise reduction of the motor is required, it is necessary to reduce the clearance between the inner surface of the box and the outer surface of the power supply brush. As a result, a load is applied to one side wall of the box due to the bending of the closing plate. This technique cannot be adopted because the box is easily deformed and the clearance may be abnormally reduced. In addition, since bending requires a relatively large number of processing steps, improvements are required to meet the current cost reduction demands.

In the case where the outer diameter side of the power supply brush device is covered with a deep housing wall, the spring must be mounted in the outer diameter direction. Will be kept. Therefore, when the rotor is mounted between the power supply brushes, it is necessary to keep the power supply brush urged to the inner diameter side by the spring to be pulled and held to the outer diameter side, so that the equipment cost is increased and the motor cost is reduced. It is contributing to the rise.

Further, in general, the power supply brush has a rectangular cross section elongated in the axial direction of the motor in order to improve the rectifying performance. For this reason, the spring provided inside the box has a spring wire formed in an annular shape,
In some cases, the motor tends to tilt in the axial direction of the motor in the box, and the set biasing load cannot be applied to the power supply brush in some cases.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides that the rear portion of the box is closed by a one-touch operation without deforming the box, and the power supply brush is pulled to the outer diameter side. It is an object of the present invention to provide a power supply brush device that enables mounting of a rotor without holding the rotor and that does not tilt the spring.

[0006]

According to a first aspect of the present invention, a power supply brush, a spring for urging the power supply brush from the rear to the inner diameter side, and an interior hole for housing the power supply brush and the spring are formed. A power supply brush holding substrate having a box, and a power supply brush device,
The box has a rear end upper portion and a rear end portion that are at least the interior portion of the spring of the interior hole, and a rear end upper closing piece that closes the rear end upper portion and the rear end portion; The gist is that the upper part and the rear end of the rear end side are closed by fixing a closing member having a rear end closing piece to the power supply brush holding substrate.

According to a second aspect of the present invention, in the power supply brush device according to the first aspect, the closing member is inclinedly inserted into a fitting hole formed in the power supply brush holding substrate, and the fitting is performed. The gist of the present invention is that a collapsible piece is formed which expands to the original state having the width of the fitting hole or more after penetrating the mating hole and fixes the closing member to the power supply brush holding substrate.

[0008] The invention described in claim 3 is the first and second inventions.
In the power supply brush device described in (1), the gist of the invention is that an insertion recess for inserting a tool for clamping the spring between the rear end closing piece and the rear end side upper closing piece is formed.

The invention described in claim 4 is the first to third aspects of the present invention.
In the power supply brush device described in the above, the rear end closing piece has a regulating piece that regulates the holding of the annular spring and a position in the box, and is erected vertically toward the interior hole. The point is that

[0010]

According to the first aspect of the invention, at least the rear end of the interior hole of the interior hole of the spring, which is the interior part of the spring, is open. By fixing a closing member, which is a separate component having a rear end side upper closing piece and a rear end closing piece for closing the rear end part, to the power supply brush holding substrate, the rear end side upper part and the rear end part are fixed. It is closed. Therefore, by the fixing of the closing member, a load is not applied to the box, especially the box on the interior side of the power supply brush, the box is not deformed, and the clearance between the power supply brush and the box can be changed. Absent. Also, since the upper part of the rear end side of the box is opened and the spring is mounted on the outer diameter side of the motor and is mounted from the axial direction, the mounting of the spring on the box without interference of the rotor and the outer peripheral wall. Becomes possible. Therefore, after the rotor is mounted between the power supply brushes, the spring can be mounted on the box, so that the power supply brush does not need to be pulled and held on the outer diameter side.

According to the second aspect of the present invention, the closing member is inserted into the fitting hole formed in the power supply brush holding substrate while being inclined, and is inserted through the fitting hole. A collapsible piece is formed which expands to the original state having the width or more and fixes the closing member to the power supply brush holding substrate. Therefore, the fixing of the closing member to the power supply brush holding substrate is instantaneously performed by a one-touch operation by inserting the collapsible piece into the fitting hole.

According to the third aspect of the present invention, the rear end side upper closing piece is formed with an insertion recess for inserting a tool for holding the spring between the rear end closing piece and the rear end closing piece. Therefore, the closing member and the spring can be integrally fixed to the power supply brush substrate and the box, and the fixed mounting is further facilitated.

According to the fourth aspect of the present invention, the rear end closing piece has a restricting piece for restricting the holding of the annular spring and its position in the box toward the interior hole. It stands upright. Therefore, when the spring is mounted, the closing member and the spring can be fixedly mounted in a state where the spring is held by the restricting piece, and the fixed mounting is further facilitated. Further, the spring provided inside the box can prevent the spring from being tilted in the box by the regulating piece, and can apply an appropriate biasing load to the power supply brush.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below with reference to FIGS. A power supply brush device 10 according to the present invention used in a motor has a rectangular shape in which the power supply brush has a rectangular cross section that is long in the axial direction of a motor that supplies power to an armature (not shown) by contacting a commutator (not shown) as shown in FIG. 20, a terminal 24 for connecting a lead wire 22 fixed to the insulator power supply brush 20 and connecting to an external power supply (not shown), and an annular shape obtained by spirally winding a spring wire for urging the power supply brush 20 from the rear to the inner diameter side. Spring 30 (FIG. 2)
And a rectangular inner hole 42a (shown in FIG. 3) for housing the power supply brush 20 and the spring 30 and a rear end side of the inner hole 42a which is an inner part of the spring 30. Power supply brush holding substrate 40 provided with box 42 having open upper and rear ends
And a rear end upper closing piece 52, a rear end closing piece 54, and a rear end side wall piece 56 for closing the upper rear end and the rear end.
And a closing member 50 having

Here, the closing member 50 is an enlarged view of FIG. 1A, FIG. 2 is an enlarged view of FIG. 1, FIG. 3 is an enlarged view of BB, and FIG. Is D in (a)
As shown in FIG. 5 (c), the right end of the rear end side upper closing piece 52 has a groove 42b (see FIG. 5) provided at the upper end of the rear side wall of the box 42. ), And an insertion recess 52b for inserting a tool 60 for clamping the spring 30 between the rear end closing piece 54 and the front end of the rear end side upper closing piece 52. At the center of the rear end closing piece 54, a cylindrical regulating piece 54a having an outer diameter slightly smaller than the annular inner diameter of the spring 30 and standing vertically toward the interior hole 42a is provided at the rear end side. The lower end of the side wall piece 56 is provided with the power supply brush holding substrate 40.
Is inserted into the fitting hole 44 provided at an angle, and after being penetrated through the fitting hole 44, is expanded to the original state where the width is equal to or more than the width of the fitting hole 44, and is provided beside the fitting hole 44. Collapsible piece 5 that resiliently contacts the bottom surface 46a and the side surface 46b of the engagement groove 46
6a are formed.

Under the above-described component configuration, the fixing of the closing member 50 and the spring 30 to the box 42 is performed as shown in FIG. That is, first, the spring 30 is mounted on the cylindrical outer peripheral surface of the restricting portion 54a. Next, the tip piece 60 a of the tool 60 is inserted into the insertion recess 5.
2b, the spring 30 is sandwiched by the rear end closing piece 54, and the closing member 50 and the spring 30 are integrally held. Finally, set the tool 60 to F
Direction, that is, the axial direction of the motor,
Into the groove 42b and the collapsible piece 56a into the engaging groove 4b.
6, the closing member 50 and the spring 30 are fixedly mounted on the box 42 by being fitted and engaged.

According to the above-described embodiment of the present invention, the box 42 is provided with the spring 3 in the interior hole 42a.
A rear end upper portion and a rear end portion, which are the interior portions 0, are open and have a rear end upper closing piece 52 and a rear end closing piece 54 for closing the rear end upper portion and the rear end portion. The box 42
The upper part and the rear end of the rear end side are closed by fixing the closing member 50, which is a separate component, to the power supply brush holding substrate 40. Therefore, by the fixing of the closing member 50, no load is applied to the box 42, especially the box 42 on the interior side of the power supply brush 20, and the box 42 is not deformed. Does not change the clearance. Also, the upper rear end side of the box 42 is opened,
Since the spring 30 is mounted on the outer diameter side of the motor and is mounted in the axial direction, the spring 30 can be mounted on the box 42 without interference from the rotor and the outer peripheral wall. Accordingly, the spring 30 can be mounted on the box 42 after the rotor is mounted between the power supply brushes 20, so that the power supply brush 20 does not need to be pulled and held on the outer diameter side.

Further, the closing member 50 is inserted into the fitting hole 44 formed in the power supply brush holding substrate 40 at an angle, and becomes greater than the width of the fitting hole 44 after passing through the fitting hole 44. A collapsible piece 56a that expands to the original state and fixes the closing member 50 to the power supply brush holding substrate 40 is formed. Therefore, the fixing of the closing member 50 to the power supply brush holding substrate 40 is instantaneously performed by a one-touch operation by inserting the collapsible piece 56a into the fitting hole 44. Further, the tip of the collapsible piece 56a is
a and the side surface 46b, so that the closing member 50 is fixed to the power supply brush holding substrate 40 in the up-down direction, the left-right direction, and the front-rear direction in FIG.

Further, the rear end side upper closing piece 52 is formed with an insertion concave portion 52b for inserting a tool 60 for holding the spring 30 between the rear end closing piece 54 and the rear end closing piece 54. Therefore, the closing member 50 and the spring 30 can be integrally mounted on the power supply brush substrate 40 and the box 42, and the fixed mounting is further facilitated.

Further, on the rear end closing piece 54, a regulating piece 54a for holding the annular spring 30 and regulating its position in the box 42 is erected vertically toward the interior hole 42a. Have been. Therefore, when the spring 30 is mounted, the closing member 50 and the spring 30 can be fixedly mounted while the spring 30 is held by the restricting piece 54a, and the fixed mounting is further facilitated. Further, the spring 30 provided inside the box 42 is prevented from tilting in the box 42 by the regulating piece 54a,
An appropriate biasing load can be applied to the power supply brush 20.

In the above embodiment, the restricting portion 54a
Is provided, but it is not always necessary to provide the restricting piece 54a. In this case, the spring 30 is fixedly mounted by directly holding the spring 30 between the front end piece 60a of the tool 60 and the rear end closing piece 54 and moving the closing member 50 in the axial direction. In addition, the spring 30 and then the closing member 50 are axially moved from the axial direction to be fixedly mounted, and have the effects of the present invention other than the effect of holding the spring 30 and the effect of regulating the position. .

[0022]

As described in detail above, according to the present invention,
Depending on the fixing of the closing member 50, the box 42,
In particular, no load is applied to the box 42 on the interior side of the power supply brush 20, the box 42 is not deformed, and the clearance between the power supply brush 20 and the box 42 is not changed. Further, the spring 30 can be mounted on the box 42 without interference between the rotor and the outer peripheral wall. Further, the fixing of the closing member 50 to the power supply brush holding substrate 40 is instantaneously performed by a one-touch operation. Further, the closing member 50 and the spring 30 can be fixedly mounted while the spring 30 is held on the restricting piece 54a, and the fixed mounting is further facilitated. Further, the spring 30 provided inside the box 42 is prevented from tilting in the box 42 by the restricting piece 54a, and an appropriate biasing load can be applied to the power supply brush 20.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a power supply brush device according to the present invention.

FIG. 2 is an enlarged view of FIG.

FIG. 3 is an enlarged sectional view taken along the line BB of FIG. 1;

FIG. 4 is a diagram of a single closing member according to the present invention.

FIG. 5 is a view showing a fixed mounting of a spring and a closing member according to the present invention.

[Explanation of symbols]

10 ... Power supply brush device, 20 ... Power supply brush, 22 ...
Lead wire, 24 ... Terminal, 30 ... Spring, 40 ...
Power supply brush holding board, 42 box, 42a interior hole, 42b groove, 44 fitting hole, 46 engaging groove,
46a: bottom surface, 46b: side surface, 50: closing member, 5
2. Rear end upper closing piece, 52a Fitting piece, 52b
Insertion recess, 54 ... Rear end closing piece, 54a ... Restriction piece, 5
6 ... rear end side wall piece, 56a ... collapsible piece, 60 ... tool,
60a ... Tip piece

Claims (4)

[Claims] 1. A power supply comprising: a power supply brush; a spring for urging the power supply brush from the rear to the inner diameter side; and a power supply brush holding substrate including a box forming an interior hole for housing the power supply brush and the spring. A brush device, wherein the box is open at least at a rear end upper portion and a rear end portion of the interior hole of the spring, which is an interior portion of the spring, and after closing the rear end upper portion and the rear end portion. A power supply brush device, wherein the rear end upper portion and the rear end portion are closed by fixing a closing member having an end side upper closing piece and a rear end portion closing piece to the power feeding brush holding substrate. . 2. The closing member is tilted and inserted into a fitting hole formed in the power supply brush holding substrate, and expands to an original state where the width is equal to or larger than the fitting hole width after penetrating the fitting hole. The power supply brush device according to claim 1, wherein a foldable piece that opens and fixes the closing member to the power supply brush holding substrate is formed. 3. A rear end side upper closing piece is formed with an insertion groove for inserting a tool for holding the spring between the rear end closing piece and the rear end closing piece.
A power supply brush device according to item 1. 4. The rear end closing piece is provided with a restricting piece for holding the annular spring and for restricting a position in the box in a vertical direction toward the interior hole. The power supply brush device according to claim 1, wherein: