JPS61101988A - Rectifier wear detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Field of application of the invention] of TECHNICAL FIELD The present invention relates to a glider wear detection device.

[Background of the invention]

FIGS. 3 to 5 show a turbulent wear detection device disclosed in Japanese Patent Application No. 57-185944.

As shown in the figure, the commutator wear detection device is one in which a wear limit display hole 2 is provided at the wear limit dimension H of the commutator piece 1 and penetrates through one of the commutator pieces 1 in the thickness direction, or a commutator wear detection device is used. Piece 1
These display holes 2 are often provided with an appropriate length in the axial direction centered on the thickness of the commutator piece 1.Since each of these display holes 2 is provided inside the commutator piece 1, it is easy to check the amount of remaining wear from the outside. It is difficult to know. Therefore, commutator piece 1, that is, commutator piece 1
In order to know the amount of wear on the commutator 1a, which is composed of After calculating, it is necessary to find the dimensions up to the indicator hole 2, which not only requires a great deal of effort, but also often results in the wear limit of the commutator piece 1 being known only after the indicator hole 2 is exposed. This will cause damage to this area. In addition, in FIGS. 3 and 4, 3 is a brush mounting bracket, in FIG. 4, 4 is a brush, and 5 is a brush holder.

FIG. 6 shows an alternative conventional example of a commutator wear detection device. This is from the outer peripheral surface of the commutator 1a to the commutator piece 1.
An indicator hole 2a of an appropriate depth is made in the center of the thickness of one sheet toward the center of the inner diameter, and the depth is measured to detect the wear amount of the commutator piece 1, that is, the commutator 1a. With this device, it can be easily determined from the outside, but since the brush slides at a high circumferential speed on the surface of the commutator plate 1, a large amount of abrasion powder is generated. There is a drawback that it accumulates at the bottom, making it difficult to accurately measure the depth of the 1-indication hole 2a.

[Purpose of the invention]

The present invention has been made in view of the above points.

It is an object of the present invention to provide a commutator wear detection device that can accurately detect the amount of wear on a commutator.

[Summary of the invention]

That is, the present invention includes a movable member disposed on a commutator, movable in a direction perpendicular to the commutator surface, and supported by being elastically pressed toward the side opposite to the commutator, and a movable member fixed to a part of the movable member. an indicator needle and a wear amount scale facing the indicator and fixed to a fixed side, and moving the movable member toward the surface of the commutator using the indicator needle and the scale. The device is characterized in that the amount of wear on the commutator is detected by knowing the amount of wear, whereby the movable member is moved toward the surface of the commutator and the amount of movement is measured using an indicator needle and a dial. By knowing this, the amount of commutator wear can be detected.

[Embodiments of the invention]

The present invention will be explained below based on the illustrated embodiments. An embodiment of the invention is shown in FIGS. 1 and 2. FIG. Note that parts that are the same as those in the conventional system are given the same reference numerals, and therefore their explanations will be omitted. In this embodiment, the commutator wear detection device is
A movable member 6 disposed on the surface of the commutator 18, movable in a direction perpendicular to the surface of the commutator 18, and elastically attached and supported toward the side opposite to the commutator; and a part of the movable member 6. An indicator needle 6a fixed to the t
A completed. The amount of wear on the commutator 1a is detected by moving the heating member 6 toward the surface of the commutator 18 and determining the amount of movement between the indicator needle 6a and the scale plate 7. By doing this, the wear amount of the commutator 1a can be detected by moving the moving member 6 toward the surface of the commutator 1a and knowing the amount of movement using the indicator needle 6a and the scale ff17. A commutator wear detection device that can accurately detect the amount of wear on the element 1a can be obtained.

That is, a moving member 6 is provided at the end of the brush mounting bracket 3 on the stator side of the DC machine, and this moving member 6 is connected to a tension spring 8.
The brush mounting bracket 3 is elastically pressed and supported by the brush mounting bracket 3 side. And the commutator 1 of the moving member 6
An insulated contact 6b is fixed to the tip of the side a, and the insulated contact 6b
When in contact with the rectifier fin, that is, the outer periphery of the commutator 1a,
The surface of the commutator 1a was prevented from being damaged. A push button 6c is provided at the end of the moving member 6 on the side opposite to the commutator 1a.

At the end of the brush mounting bracket 3, a wear scale plate 7 that clearly indicates the wear amount of the commutator piece 1 (commutator 1a) is attached to the moving member 6.
The scale plate 7 is provided so as to face the indicator needle 6a fixed to a part of the dial plate 7, but the insulated contact 6a of the movable member 6
The position when b touches the outer peripheral surface of commutator piece 1 is the upper limit scale 7
The lower limit scale 7b is the movement position of the insulated contactor 6b when the contactor 6b is set at the wear limit dimension H, and an arbitrary scale is placed between them. By doing this, the push button 6c is pushed to move the moving member 6, the insulating contactor 6b is brought into contact with the outer circumferential surface of the commutator piece 1, and the amount of movement is read using the indicator needle 6a and the scale plate 7.

The amount of wear on the commutator 1a can now be detected, and the amount of wear on the commutator 1a can now be detected without being affected by wear particles as in the past, making it possible to accurately detect the amount of wear on the commutator 1a. . In addition, since the amount of wear can be enlarged and viewed on the scale plate 7, it is not only possible to detect the amount of wear easily, but also to easily monitor the wear limit from the outside, allowing preventive maintenance and life estimation. It can contribute to

Another embodiment of the invention is shown in FIGS. 7 and 8. In this embodiment, the movable member 6 is movably attached to the side of the brush handle base metal fitting 3 via a fulcrum pin 9. In addition, in the figure, 10 is a stopper. In this case as well, if the amount of movement when the insulated contactor 6b of the moving member 6 is brought into contact with the outer periphery of the commutator piece 1 can be read, it can be detected by the amount of wear on the commutator 1a, similar to the case described above. It can produce effects.

〔Effect of the invention〕

As described above, the present invention makes it possible to accurately detect the amount of wear on the commutator, thereby providing a commutator wear detection device that can accurately detect the amount of wear on the commutator.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional side view of the area around the detection device of an embodiment of the commutator wear detection device of the present invention, and FIG.
%, FIG. 3 is a longitudinal cross-sectional side view of the commutator section around the wear limit display hole of a conventional commutator wear detection device, and FIG. 4 is a cross-sectional view taken along line B-B in FIG. 3. Fig. 5 is the same〈longitudinal side view of the commutator around the wear limit display hole of the conventional conventional wear limit display hole, Fig. 6 is a longitudinal side view of the commutator around the wear limit display hole of another example of the conventional commutator wear detection device, FIG. 7 is a longitudinal sectional side view of the vicinity of the detection device of another embodiment of the commutator wear detection device of the present invention;
The figure is a sectional view taken along line C-Ca in FIG. 7. DESCRIPTION OF SYMBOLS 1... Commutator piece, 1a... Commutator, 3... Brush mounting bracket, 4... Brush, 5... Brush holder, 6...
Moving member, 6a... indicator needle, 6b... insulated contactor,
6C...Push button, 7...Wear amount scale, 7a...
・Upper limit scale, 7b...Lower limit scale, 8...Tension spring, 9
...Fulcrum pin.

Claims (1)

[Claims] 1. A supported moving member disposed on the commutator, movable in a direction perpendicular to the commutator surface, and elastically pressed toward the side opposite to the commutator, and one part of this moving member. an indicator needle fixed to the part, and a wear scale plate facing the indicator needle and fixed to the stationary side, and moving the movable member toward the surface of the commutator to remove the indicator needle and the scale plate. A commutator wear detection device, characterized in that the amount of wear of the commutator is detected by knowing the amount of movement of the commutator. 2. The commutator wear detection device according to claim 1, wherein the movable member has an insulating contact fixed to its tip on the commutator side.