JPS5837672B2 - Kaitendenkiyosatsushihojiki - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brush holder for a rotating electrical machine, and particularly to a brush holder for a rotating electrical machine suitable for use in an atmosphere with a lot of dust, such as a rotating electrical machine for a vehicle.

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 constructed by integrally forming a holder case 1 made of gunmetal casting, a pocket part 1a for inserting the brush 2 into the holder case 1, a Hijiden wire connection part 1b, and a brush connection part 1c. It has been pierced.

Further, six spiral springs 3, which press the brush 2 inserted into the pocket portion 1a at one end and whose other end is fixed to the spring shaft 4, are installed in the frame 1d integral 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, one end of the spiral spring 3 is pulled up to engage the spring catch 6, so that the spiral spring 3 does not get in the way when replacing the brush. It is a spring support.

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. So it's 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 manufacturing of the retainer case 1 is completed before installing the spiral spring 3 and adjusting the spring pressure of the spiral spring 3. As a result, the manufacturing process of the brush retainer 10 becomes longer and standardization is required. This was an obstacle to moving forward.

Further, as shown in FIGS. 2 and 3, the retainer case 1 has a pocket portion for mounting the brushes 2, a spiral spring 3, a spring device consisting of a spring shaft 4, etc., which are integrated into the brush retainer. .

In this case, the spring shaft 4, the spring pressure adjustment fitting T1, and the spiral spring 3 are all installed within the frame 1d of the cage case 1, which is formed in a continuous manner with the cage case 1, and the spring pressure adjustment fitting is installed after the assembly work is completed. 7 to adjust the pressing force of the spiral spring 3.

This spring pressure adjusting fitting 7 is already fixed to the retainer case 1, and the spring shaft 4 that fixes the inner end of the spiral spring 3 is fitted therein.

The spring shaft 4 and the spring pressure adjustment fitting 7 are each provided with a plurality of radial holes into which adjustment pins 8 are fitted. After that, the adjustment pin 8 is communicated with the hole of the spring shaft 4 and the spring pressure adjustment fitting 7 to complete the adjustment of the pressing force.

However, when the brush holder shown in FIG. 2 and FIG. Since the spiral spring 3 is configured so as to cover both sides, dust is likely to accumulate in this area, and as a result, dust also accumulates in the 1M part between the layers of the spiral part of the spiral spring 3, which prevents the normal brush 2 of the spiral spring 3 from being pressed. The pressure will be lost, and the fitting portion of the spring pressure adjustment fitting 7 and the spring shaft 4 will also be worn out.

Furthermore, FIG. 4 shows brush holders 10A to IOD arranged around the outer periphery of the main motor 11 and commutator CM in a general electric vehicle.
, and the positional relationship with the vehicle's accessory equipment.

As shown in the figure, a vehicle 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 power output section, a trap door provided on the floor surface F of the vehicle body or a pit provided on the road surface L is usually used to inspect the upper and lower parts of the outer frame Y. I went through the inspection window YW.

For this reason, the brush holders 10A to IOD 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 disposed 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 10D and the brush holders 10B and 10C face each other.

Therefore, if the brush holder is arranged as shown in Fig. 4, the brush holder configured as shown in Fig. 1, Fig. 2, and Fig. For convenience, two types of brush holders must be prepared, one for mounting on the right side and one for mounting on the left side.

For this reason, two types of wooden molds and metal molds for the retainer case shape are required, making standardization difficult and extremely uneconomical.

The present invention has been developed in view of the above points, and its purpose is to simplify the structure of the retainer case and the spring device to facilitate manufacturing work, thereby making it possible to standardize the spring device. To provide an economical brush holder for a rotating electrical machine that eliminates the harmful effects of dust on equipment and does not require two types of spring device parts or holder cases even if the mounting conditions are different.

The present invention includes a cage mount that is attached to a fixed part of a rotating electrical machine and a pocket into which a brush is inserted to form a cage case, and one end of a support arm is removably attached to the outer wall surface of the pocket of the cage case. , a spring shaft is fixed to the other end of the support arm so as to protrude from both sides, the other end of the spiral spring is fixed to the protrusion of the spring shaft, and a mounting portion is provided for removably mounting the support arm. The desired purpose is achieved by forming these shapes on both outer wall surfaces of the opposing pockets.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

Incidentally, the same reference numerals are used for the same parts as in the past.

An embodiment of the brush holder of the present invention is shown in FIGS. 5 and 6.

As shown in the figure, the retainer case 12 of this embodiment is constructed by integrating a retainer mounting portion 12a that is attached to a fixed part of the rotating electric machine and a pocket portion 12b into which the brush 2 is inserted.

On the other hand, the spring device part is fixed to a support arm 13 whose one end is removably attached to a mounting part 12c formed on the outer wall surface of the retainer case 12, and to the other end of this support arm 13 so as to protrude from both sides thereof. It consists of a spring shaft 14 and two spiral springs 15a, 15b, one end of which is fixed to the protrusion of the spring shaft 14 and the other end of which presses the brush 2. It is arranged symmetrically with respect to the support arm 13.

More specifically, one end of the spiral springs 15a, 15b is connected to a fixing groove (
(not shown), and the spiral springs 15a, 15b are arranged along both sides of the support arm 13.

Further, in order to detachably attach the support arm 13, the retainer case 12 of this embodiment has a mounting portion 12c formed on the outer wall surface of the pocket portion 12b, and a pocket portion 1 opposite to each other.
2b, parallel to the bottom surface of the retainer case 12.
The attachment portion 12d is provided at a position rotated by 80 degrees, that is, on a wall surface symmetrical to the center line, so that the support arm 13 can be attached to either outer wall surface of the pocket portion 12b.

Reference numeral 16 is a spring support and is fixed by rivets or welding to a position on the support arm 13 that does not impede the movement of the spiral springs 15a, 15b.
is pulled up and engaged with the spring support 16 to prevent the spiral springs 15a, 15b from getting in the way when replacing the brush 2.

Further, the support arm 13 is removably fixed by bolting to the wall surface of the retainer case 12 via the mounting plate 17.

On the other hand, the connection of the Hiji line is removably attached to the wall surface of the cage case 12a on the side opposite to the spring device by tightening a bolt to a Hiji line connection part 18 which is separate from the cage case 1.

In the figure, reference numeral 192 is a pin provided through the support arm 13 and the spring shaft 14, and is used to adjust the spring pressure of the spiral springs 15a, 15b.
4 is provided with a large number of through holes into which pins 19a are inserted.

Reference numeral 19b is a pin provided to prevent washers provided on both sides of the spiral portions of the spiral springs 15a and 15b from falling off the spring shaft 14.

According to this embodiment constructed in this way, there is no cage case frame that covers the spiral portion of the spiral spring as in the conventional case, so it can be used even in a dusty atmosphere such as a rotating electric machine for a vehicle. No more dust accumulation.

Therefore, dust will not enter between the layers of the spiral spring or into the fitting part of the spring shaft, which not only prevents the brush pressing force of the spiral spring from being impaired, but also prevents wear of the fitting part of the spring shaft. be done.

In addition, since the spiral spring device and the lead wire connection section are each removably attached to the outer wall surface of the cage case 12, the cage case 12, the spring device, etc. can be manufactured in parallel by independent manufacturing departments. , can be adjusted independently, making the manufacturing process of the brush holder extremely simple and standardization possible.

In addition, the cage case 12 has a cage mounting portion 12a and a pocket portion 12b integrally formed, and mounting portions 12c and 12d on both opposing outer wall surfaces of the cage case 12.
, the mounting direction of the brush holder can be changed without changing the position of the pocket part 12b, or in other words, the position of the brush 2, by simply changing the mounting position of the spring device part and the drawing wire connection part 18. This eliminates the need to prepare two types of brush holders, making it possible to promote standardization.

Furthermore, since the spiral springs 15a, 15b and the spring shaft 14 are not mounted within the frame and can be visually observed, maintenance and inspection are easy, and cleaning can also be carried out.

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 pocket part of the brush is detachably separated from the spring device part'/J) so that the brush drinking tray can be adjusted.

Such a brush holder is advantageous in that the brush pocket part and the spring device part can be manufactured in parallel, so that the manufacturing process of the brush holder can be shortened.

7l) If it becomes necessary to arrange the brush holders facing each other as shown in Fig. 4, since the brush holder mounting part is integrated with the spring device side, the brush holder mounting part Two types of spring devices with different positions must be prepared,
In addition, even if it is possible to prepare it, since the spring device is the main component for mounting to a fixed part, the pocket part of the brush, or in other words, the position of the brush, will change significantly, and in the case of the main motor of an electric car, Since the brush position shifts from the neutral point, it becomes impossible to use it as is.

Therefore, when separating the pocket portion of the brush, it is essential that the pocket portion be separated while being integrated with the brush holder attachment portion.

Next, FIGS. 7 and 8 show a brush holder that uses three brushes 2 at the same time, in which three spiral springs 15a, 15b, 15c are connected to two support arms 13a, 13
The support arms 13a and 13b are supported by a spring shaft 14 supported by a spring shaft 14, and the support arms 13a and 13b are removably attached to the wall surface of the cage case 12 via a mounting plate 17.

Two spring supports 16 are provided to engage when the spiral springs 15a, 15b, 15c are pulled up when replacing the brush 2, etc.

The other configurations are exactly the same as the embodiments described above.

9 and 10 show modified examples of the shape of the support arm. The support arm in this embodiment has an L-shape, and a spring shaft 14 is attached to one end of this L-shaped support arm 20. Fit and support, L
The other end of the letter-shaped support arm 20 is attached to the mounting plate 21 together with the spring support 16.
This mounting plate 21 is removably fixed to the wall surface of the cage case 12.

The other structures are substantially similar to the embodiments described above.

Even with the configurations shown in FIGS. 7 to 10, the effects are exactly the same as those of the embodiments shown in FIGS. 5 and 6.

By the way, the support arms shown in FIGS. 5 to 10 mentioned above are made by bending thick steel plates, but the
What is shown in the drawings and FIG. 12 is a brush holder in which the support arm 22 is made of gun metal. Alternatively, this support arm 22 is detachably attached to the wall surface of the retainer case 12 with bolts or the like.

Even if this is done, the effect is exactly the same.

In each of the embodiments so far, the cage case has been described as being made of gunmetal casting, but it goes without saying that the same effect can be achieved even if the cage case is made of alloy, resin mold, or any other suitable material.

According to the brush holder for a rotating electric machine of the present invention explained above,
A cage additional part to be attached to the fixed part of the rotating electrical machine and a pocket for inserting the brush are integrated to form a cage case, and one end of the support arm is removably attached to the outer wall surface of the pocket of the cage case, and A spring shaft is fixed to the other end of the support arm so as to protrude from both sides, and the other end of the spiral spring is fixed to the protrusion of the spring shaft, and a mounting portion is provided for detachably attaching the support arm. Since the brush holder case and the spring device part can be separated and independent because they are formed on both outer walls of the opposing pockets, they can be manufactured in parallel by independent production departments, and the main body can be made independently. This makes it possible to make adjustments and standardize the brush holder, shortening the production period and reducing manufacturing costs.In addition, there is no need to cover the spiral spring or spring shaft, so there is no accumulation of dust. The harmful effects caused by this are also prevented.

In addition, the mounting direction of the brush holder can be changed arbitrarily by simply changing the position of the spring device without changing the position of the brush, and two types of spring devices and cage cases are not required even if the installation conditions are different. Therefore, it is very effective for this type of brush holder.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view showing an example of a conventional brush holder;
The figure is a plan view showing another example of a conventional brush holder, Fig. 3 is a vertical sectional view of Fig. 2, and Fig. 4 is a sectional view showing a conventional brush holder installed in a general electric car. , FIG. 5 is a plan view showing one embodiment of the brush holder of the present invention, FIG. 6 is a front view thereof, and FIG. 7 is a brush holder of another embodiment of the present invention.
FIG. 8 is a plan view of a case in which three spiral springs are used, FIG. 8 is a front view thereof, and FIG. 9 is a brush holder according to another embodiment of the present invention, in which the support arm is shaped like an L character. FIG. 10 is a plan view of the brush holder, FIG. 11 is a plan view of the brush holder when the support arm is made of gun metal, and FIG. 12 is a front view of the brush holder. 1, 12...Cage case, la, 12b...
...Pocket part, lb, 1B...Hiji Line connection part, 1c...Brush connection part, 1d...
Frame of cage case, 2...Brush, 3.15a,
15b, 15c... Spiral spring, 4, 14...
... Spring shaft, 5, 16 ... Spring support, 7 ...
...Spring pressure adjustment fitting, 8.19a. 19b...
・Pin, 1 0, IOA, 1 0B, IOC, IOD
...Brush holder, 12a...Cage mounting part, 131 3a, 1 3b, 22-support arm, 17.21-...Mounting plate, 20...・・L
Glyph support arm.

Claims (1)

[Claims] 1 A cage case that has a cage mounting part that is attached to the fixed part of the rotating electric machine and a pocket that inserts the brush, and one end that presses the brush in the pocket of the cage case, and the other end that is fixed to the spring shaft. In the brush holder for a rotating electric machine, the spring shaft is supported by the holding case via a support arm, and the cage case is constructed by integrating the cage mounting portion and the pocket. One end of the support arm is removably attached to the outer wall surface of the pocket of the retainer case, and the spring shaft is fixed to the other shaft of the support arm so as to protrude from both sides, and the protruding portion of the spring shaft is fixed to the other shaft of the support arm. A brush holder for a rotating electric machine, wherein the other end of the spiral spring is fixed to the brush holder, and mounting portions for removably mounting the support arm are formed on both wall surfaces on the outside of the opposing pocket.