JPS5840548Y2 - brush holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brush holder, and particularly to a brush holder suitable for use in a rotating electrical machine for a vehicle.

Generally, rotating electric machines are often installed and used in places with narrow surroundings.

In particular, in the case of a traction motor for a vehicle, the motor is placed in extremely restricted surrounding conditions, such as narrow rail spacing and under the floor of the vehicle body.

Therefore, careful consideration is required in designing the component arrangement of the current collector, which requires periodic maintenance and inspection.

Among these, the structure of the brush holder, as well as its mounting position and direction, have a major influence on the difficulty of daily maintenance work.

FIG. 1 shows the structure of a common brush holder for rotating electric machines that has been used in the past.

In the figure, the brush holder 10 is formed integrally with a holder case 1 made of gunmetal casting, a pocket part 1a into which the brush 2 is inserted, a Hiji wire connection part 1b, and a brush connection part 1C. has been done.

Further, a spiral spring 3 whose one end presses the brush 2 inserted into the pocket portion a and whose other end is fixed to the spring shaft 4 is mounted within the frame 1d integrated with the retainer case 1, and The spring shaft 4 is supported by the frame 1d of the cage case 1.

Note that 5 is formed integrally with the retainer case 1, and when replacing the brush 2, etc., one end of the spiral spring 3 is pulled up to engage the spring hook 6, so that the spiral spring 3 does not get in the way when replacing the brush. It is spring supported.

Further, although not shown in this figure, mounting parts are actually provided in order to attach the retainer case 1 to a fixed part of the rotating electric machine.

Looking at the manufacturing process of the brush holder 10 shown in FIG. is normal.

Furthermore, the retainer case 1 has a complicated shape because various functions such as the pocket portion 1a and the Hiji wire connecting portion 1b are integrated.

For this reason, it is necessary to wait until the manufacture of the retainer case 1 is completed before installing the spiral spring 3 and adjusting the spring pressure of the spiral spring 3. This may lengthen the manufacturing process of the brush retainer 10, or increase the spring pressure to a predetermined value. In order to achieve this, it was necessary to adjust the spring itself and readjust it during assembly, which was an obstacle to standardization.

Furthermore, if improvements are made to the brush holder 10, especially to the spring device, or if some connections to the Hiji Line have to be changed due to in-machine wiring, etc., these changes will be made. Integrated holding part case 1
Also, it is easy to end up in a situation where the shape has to be completely changed.

Next, FIG. 2 shows brush holders 10A to 10D arranged around the outer periphery of the main motor 11 and commutator CM in a general electric vehicle.
, and the positional relationship with vehicle accessories.

As shown in the figure, an axle S and auxiliary equipment R are usually arranged in contact with the left and right sides of an outer frame Y of the main electric motor 11.

In such an arrangement, when performing maintenance and inspection of the current collector, a trap door provided on the floor F of the vehicle body or a pit provided on the road surface is usually used to inspect the upper and lower parts of the outer frame Y. I was walking through the inspection window at YW.

For this reason, the brush holders 10A to 10D are designed so that the brush 2 part faces the inspection window YW side so that the brush 2 can be easily inspected.
The spring device portion is arranged facing the opposite side of the inspection window YW, and as shown in the figure, the mounting directions are reversed so that the brush holders 10A and IOD and the brush holders 10B and 100 face each other.

Therefore, when the brush holder is arranged as shown in Fig. 2, the brush holder configured as shown in Fig. 1 will be installed on the right side and on the left side, respectively, due to the mounting direction and the connecting position of the drawing line. Two types of special brush holders must be prepared for installation.

For this reason, the wooden molds and metal molds for forming the retainer case cannot be shared, and two types are required, making standardization difficult and extremely uneconomical.

The present invention was devised in view of the above-mentioned points, and its purpose is to facilitate and standardize the manufacturing work of the retainer case, spring device part, and electric wire connection fittings, as well as to simplify the installation conditions. To provide a brush holder in which a spring device and a wire connection fitting can be attached to any side surface using the same parts without requiring two types of holder cases even if they are different.

The present invention presses the brush inside the brush pocket against one of the outer surfaces of the opposite wall of the brush pocket, which is orthogonal to the fixed arm of the case body, which is formed by a fixed arm attached to a fixed part of a rotating machine and a brush pocket into which a brush is inserted. A spring device is removably attached, and an electric wire connection fitting for electrical connection to the outside is detachably attached to the other outer surface of the opposite wall, and either the spring device or the electric wire connection fitting is detachable. The intended purpose is achieved by configuring the mounting portions on the outer surfaces of the opposing walls of the brush pockets, which can be mounted, to be symmetrical with respect to each other.

Hereinafter, the present invention will be described in detail based on embodiments of the drawings.

An embodiment of the present invention is shown in FIGS. 3 and 4.

In this figure, 51 is the case body of the brush holder 50A, and the brush pocket (51) into which the brush 52 is inserted is a fixed arm portion 51a whose surface constitutes an electrically insulating surface. The fixed arm portion 51 a of the case body 51 is integrally molded from synthetic resin.
Attachment holes for attaching the spiral spring device 60 and the electric wire connection fitting 70 are provided on both sides of the outer surface of the opposing wall of the brush pocket 51P, which is orthogonal to the brush pocket 51P.

This screw hole is formed by embedding filler metals 51b having screw holes symmetrically with each other.

The spiral spring device 60 is separate and independent from the case body 51, and is configured such that one end of the spiral spring 61 is inserted and fixed into a spring shaft 62 fixed to a spring device attachment 63, and the other end is pressed against the head of the brush 52. This is the one with the spring hook 6
4 is attached, washers 65 are inserted on both sides of the spiral spring 61, and assembled with split pins 66.

When the spiral spring device 60 is attached to the case body 51, it is removably attached to the fillet 51b provided on the outer surface of the opposing wall of the brush pocket 51P via a spring device attachment 63 with a bolt or the like. .

That is, the spiral spring device 60 in this embodiment has a case body 51.
It is separate and independent from the case body 51 and is unitized as a pressurizing device, so that it can be arbitrarily attached and used on either side of the outer surface of the opposing wall of the brush pocket 51P that is perpendicular to the fixed arm 51a of the case body 51. It is configured.

On the other hand, the electric wire connection fitting 70 is also a separate and independent component from the case body 51, and has a brush connection part 70t at one end and a lead wire connection part 70l at the other end, and is connected to the fixed arm part 51a of the case body 51. It is configured so that it can be arbitrarily attached and used even on one of the outer surfaces of the facing walls of the orthogonal brush pockets 51P.

However, since both ends of this electric wire connection fitting 70 are asymmetrical in terms of installation, it is not possible to use the left and right sides in the same part. In this case, since the brush holder 50A is composed of a plurality of pieces corresponding to the plurality of electromagnetic poles, when manufacturing the electric wire connection fitting 70, the electric wire connection is made as shown in FIGS. 5 to 7. If the metal fittings 70A and 70B are integrally cast in two pieces and divided at part 0 in FIG. 5, that is, at the brush connecting portion 70t, rational mass production becomes possible.

In the figure, 701 is a Hiji Line connection section.

In short, the brush holder 51A of this embodiment has the fixed arm portion 5.
Consisting of three components: a case body 51 having a diameter of 1a, a spiral spring device 60, and a wire connection fitting 70,
A spiral spring device 60 is installed on one side of the outer surface of the opposing wall of the brush pocket (brush pocket) perpendicular to the fixed arm 51a of the case body 51.
Attach the wire connection fitting 70 on the opposite side,
At least the case body 51 remains the same part, and the spiral spring device 60 and the wire connection fitting 70 can be attached to any side of the case body 51.

Fig. 3 shows an example of how the spiral spring device 60 and the electric wire connection fitting 70 are attached to the outer surface of the opposite wall. FIG. 8 shows the state in which the metal fitting 70 is attached.

As shown in FIG. 8, according to this embodiment, it can be easily attached to any surface without any special measures.

As described above, according to this embodiment, the shape of the case main body 51 having the fixed arm portion 51a is extremely simple, and the case portion, the spiral spring device 60, and the electric wire connection fitting 70 have a very simple shape.
Since each can be completed independently, it is possible to radically rationalize the manufacturing process.

Further, regarding the setting of the spring pressure, it is sufficient to combine spring devices that have been adjusted in advance, so the assembly work can be significantly simplified.

Furthermore, even if the position of the Hiji Line connection part 70l is changed due to reasons such as improving the spring device or changing the wiring inside the aircraft, it can be done by simply replacing only the necessary parts, regardless of the case body 51. You can reach your goal.

In addition, on the other hand, even if the case part is replaced due to wear or damage of the brush pocket (51P) during use, there are many advantages such as only a minimum number of parts need to be replaced.

Furthermore, since the case main body 51 has a mounting part for the mounting relationship between the spiral spring device 60 and the electric wire connection fitting 70, there is no need to prepare two types of case main bodies 51, and the same parts can be easily assembled. A brush holder 50A having the desired mounting direction can be obtained by a simple selection.

Producing a pedestal resin molded case requires expensive molds, and it is extremely uneconomical to prepare two types of molds. This makes it possible to significantly reduce mold costs, and has an extremely large effect on standardization and mass production.

By the way, in order to align the brush with the neutral point on the commutator surface,
There is a brush holder in which only the brush pocket is separated from the spring device so that the brush position can be adjusted, and this case is also effective in that the brush pocket and the spring device can be manufactured in parallel.

However, even with such a brush holder, when the brush holders are arranged facing each other as shown in Fig. 2, the fixed arm is integrated with the spring device, so the position of the fixed arm is Two different types of spring devices must be prepared, and even if they were available, the spring device would be the main component to be attached to the fixed part, which would greatly change the position of the brush pocket, or in other words, the brush. In the case of a car's main electric motor, the brush position deviates from the neutral point, making it unusable.

In this regard, in the configuration of this embodiment, the fixed arm part is integrated with the brush pocket side, so it can be used as a brush holder by simply changing the position of the spring device and the electric wire connection fitting without changing the position of the brush pocket. You can change the mounting direction of the
There is no inconvenience as mentioned above, and the effect of making the case body, the spring device, and the wire connection fittings separable can be fully exhibited.

Although the above description has been made regarding the case made of a synthetic resin mold, the structure and effect are exactly the same even in the case of a case made of gun metal casting, except that an insulating device is added to the retainer mounting portion.

According to the brush holder of the present invention described above, the outer surface of the opposite wall of the brush pocket is perpendicular to the fixed arm of the case body formed by the fixed arm attached to the rotating machine fixed part and the brush pocket into which the brush is inserted. A spring device that presses the brush in the brush pocket is removably attached to one side, and a wire connection fitting for electrical connection to the outside is removably attached to the other side of the outer surface of the opposing wall, and this spring device Since the attachment part on the outer surface of the opposite wall of the brush pocket is configured to be removably attached to either the retainer case, the spring device part, or the electric wire connection fitting, Manufacturing can be performed separately and independently, and spring pressure adjustment can be easily performed.The structure is simple and standardization is possible, and the spring device and wire connection fittings can be maintained even if the installation conditions differ. It is extremely effective when used in this type of brush holder, as it can be installed on any external wall surface of the container case, and the same parts can be used without the need for two types of holder cases. .

[Brief Description of the Drawings] Fig. 1 is a longitudinal sectional view showing a conventional brush holder, Fig. 2 is a sectional view showing a state in which the brush holder is attached to a general electric car,
FIG. 3 is a plan view showing an embodiment of the brush holder of the present invention;
4 is a front view of FIG. 3, FIG. 5 is a plan view showing the electric wire connection fittings adopted in this embodiment, FIG. 6 is a front view of FIG. 5, and FIG. 7 is a front view of FIG. 6. The left side view and FIG. 8 are plan views showing a state in which the spiral spring device and the electric wire connection fittings are installed in a position completely opposite to that of the brush holder shown in FIG. 3. 50A... Brush holder, 51... Case body, 51 a... Fixed arm portion, 51 b...
...Filled money, 51 P...Brush pocket, 5
2... Brush, 60... Spiral spring device,
61... Spiral spring, 62... Spring shaft,
63...Spring device mounting fixture, 64...Spring hook, 70...Wire connection fitting, 701...
...Output wire connection part, 701...Brush connection part.

Claims (1)

[Scope of utility model registration request] A case body formed by a fixed arm attached to a fixed part of the rotating machine, a brush pocket into which a brush is inserted, a spring device that presses the brush in the brush pocket of the case body, and an electric wire for electrical connection with the outside. In the brush holder, the spring device is removably attached to one of the outer surfaces of the opposing wall of the brush pocket that is orthogonal to the fixed arm of the case body, and the spring device is removably attached to the outer surface of the opposing wall of the brush pocket, and the The electric wire connecting fitting is removably attached, and the mounting portions on the outer surface of the opposing wall of the brush pocket to which either the spring device or the electric wire connecting fitting is detachably attached are configured to be symmetrical to each other. brush holder.