JPH06335207A - Temporary brush holding structure - Google Patents

Abstract

PURPOSE:To temporarily easily hold a brush body in a brush holder without regulating to position the body and the holder. CONSTITUTION:A locking part 3b is engaged with a through hole 2b of a brush holder 2, and the holder 2 is grasped by a temporarily holding spring 3. A brush body 4 formed with a tapered part 4d and a locking groove 4b is inserted into the holder 2 grasped by the spring 3. Then, the part 3b is engaged with the groove 4b through the hole 2b. Accordingly, the body 4 and the holder 2 are held by the spring 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for holding a brush of a rotary electric machine, and more particularly to a temporary brush holding structure for temporarily holding a brush main body at a predetermined position of a brush holder during assembly.

[0002]

2. Description of the Related Art Conventionally, a structure of this type is shown in FIG.
(B) to FIGS. 10 (a) and 10 (b), which will be described below. First, one side surface 14 of the brush body 14
In c, a locking groove 14b is formed which is perpendicular to the direction in which the brush body 14 is pressed toward the commutator (not shown).
Further, the brush main body 14 is provided on the side surface of the brush holder 12.
A pair of through holes 12b, 12b are formed so as to be parallel to the locking groove 14b when inserting. Furthermore,
When the brush main body 14 is temporarily held in the brush holder 12, the locking groove 14b and the through holes 12b, 12
The locking groove 14b and the through holes 12b, 12b are formed so that they are aligned with b.

The brush holder 1 of the brush body 14
For temporary holding to 2, the brush holder 12 is first fixed on the plate 11 arranged in the rotating electric machine. As a result, a storage portion 12a for storing the brush body 14 is formed. Then, the spring 15 is inserted from the opening side of the storage portion 12a, and one end side 15a of the spring 15 is brought into contact with the bent wall portion 12c of the brush holder 12. As a result, the spring 15 has a biasing force toward the opening side, that is, the commutator side described later.

Next, the brush main body 14 is inserted into the storage portion from the opening side of the brush holder 12. At this time, the other end side 15b of the spring 15 comes into contact with the spring facing surface 14d, which is opposite to the commutator facing surface 14a facing the commutator in the brush body 14. Then, as the brush main body 14 is inserted toward the bent wall portion 12c side of the brush holder 12, the biasing force of the spring 15 tends to push the brush main body 14 back to the commutator side described later. When the brush main body 14 is continuously inserted against the biasing force of the spring 15, when the brush main body 14 comes to a predetermined position of the storage portion 12a, the locking groove 14b of the brush main body 14 and the through hole 12b of the brush holder 12, 12b are in a straight line. At this time, the temporary holding pin 13 is inserted from the one through hole 12b and passed through the locking groove 14b to insert the other through hole 12b. As a result, the brush body 14 is temporarily held by the brush holder 12 via the temporary holding pin 13.

[0005]

However, in such a temporary holding structure, it is necessary to adjust the engaging groove 14b of the brush body 14 and the pair of through holes 12b, 12b of the brush holder so as to be aligned with each other. I won't. At the time of this adjustment, the urging force of the spring 15 constantly tries to urge the brush main body 14 toward the commutator side, which makes the adjustment extremely difficult.

Therefore, it is an object of the present invention to provide a temporary brush holding structure which can easily temporarily hold the brush main body in the brush holder without adjusting the positions of the brush main body and the brush holder.

[0007]

In the brush temporary holding structure of the present invention, the brush main body is inserted into the brush holder, and the brush main body is biased toward the commutator by the biasing means. At this time, there is a temporary brush holding structure for holding the brush main body at a predetermined position in the brush holder, and a through hole formed on the side surface of the brush holder and a locking groove formed on the side surface of the brush main body. An elastic locking member having a biasing force toward the locking groove and having a locking portion that locks in the locking groove via the through hole; and the locking groove of the brush body. A brush temporary holding structure, characterized in that the brush main body is formed on a side surface formed with a slant portion in which the brush main body is tapered from the locking groove side toward the insertion end surface side into the brush holder. is there.

Further, in the temporary brush holding structure of the present invention, when the brush main body is inserted into the brush holder and the brush main body is biased toward the commutator side by the biasing means, the brush main body is placed in the brush holder. A brush temporary holding structure for holding the brush holder at a predetermined position, a through hole formed in a side surface of the brush holder, and a locking groove formed in a side surface of the brush body,
An elastic locking member having a biasing force toward the locking groove and having a locking portion that locks in the locking groove via the through hole, and insertion of the brush body into the brush holder. An inclined portion formed on a side surface of the locking portion facing the end surface,
And a temporary brush holding structure.

[0009]

In the temporary brush holding structure of the present invention, the elastic locking member is inserted into the through hole formed on the side surface of the brush holder, and the brush main body is inserted into the brush holder from the inclined portion side of the brush main body. Insert into. Then, the locking portion of the elastic locking member abuts and slides on the inclined portion, and the locking portion of the elastic locking member is gradually pushed in a direction opposite to the biasing force of the elastic locking member. To go.

If the brush body is further inserted, the engaging groove formed in the brush body faces the through hole of the brush holder. At this time, the locking portion that has been pressed in the locking groove formed on the side surface of the brush body in the direction opposite to the biasing force of the elastic locking member is fitted by the biasing force through the through hole, As a result, the brush body is temporarily held at a predetermined position in the brush holder. That is, when the locking portion slides on the side surface of the brush body, the locking portion moves along the shape formed on the side surface of the brush body, and the locking portion fits into the locking groove. When fitted together, the sliding becomes impossible and the brush body is temporarily held at a predetermined position in the brush holder.

Further, in the temporary brush holding structure of the present invention, the inclined portion is formed in the engaging portion of the elastic engaging member,
The insertion end surface of the brush main body into the brush holder slides on the inclined portion, and the locking portion of the elastic locking member is gradually pushed in a direction opposite to the urging force of the elastic locking member. After that, the brush main body is temporarily held at a predetermined position in the brush holder as described above.

[0012]

As described above, according to the present invention, it is possible to temporarily hold the brush main body at a predetermined position of the brush holder simply by inserting the brush main body into the brush holder without adjusting the positioning of the brush main body and the brush holder. Becomes

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
It will be described based on.

As shown in FIG. 1, a brush holder 2 shown in FIG. 3 is attached to a plate 1 fixed inside a rotary electric machine (not shown).
To fix. As is widely used in the past, the fixing piece 2a of the brush holder 2 is inserted through a hole (not shown) formed in the plate 1, and the tip side of the locking piece 2a is bent to the plate 1 side. It is fixed. Then, the through holes 2b, 2 formed in the side surface 2c of the brush holder 2
The brush holder 2 is sandwiched from the opening 3a side of the temporary holding spring 3 so that the locking portions 3b and 3b of the temporary holding spring 3 shown in FIG. To enter.

Next, the commutator contact surface 4a side of the brush body 4 shown in FIG. 2 is inserted from the opening of the brush holder 2 on the side of the bent wall portion 2d. Here, the side surfaces 4c and 4c of the brush body 4 are tapered toward the commutator side (not shown).
d and 4d are formed between the commutator contact surface 4a and the locking grooves 4b and 4b.

As the brush main body 4 is inserted into the brush holder 2, the engaging portions 3b, 3b of the temporary holding spring 3 slide on the taper portions 4d, 4d, whereby the engaging portion 3
b and 3b are pushed in mutually opposite directions.
That is, the opening 3a becomes gradually larger than the normal state. At this time, the normal state dimension C of the opening 3a is set to be larger than the minimum dimension A of the tapered portions 4d and 4d and smaller than the maximum dimension B of the tapered portions 4d and 4d.

When the brush body 4 is further inserted into the brush holder 2, the locking portions 3b and 3b are tapered portions 4d and 4b.
After sliding d, the side surfaces 4c and 4c are continuously slid. When the through holes 2b, 2b and the locking grooves 4b, 4b coincide with each other, the locking portions 3b, 3b are fitted and locked in the locking grooves 4b, 4b. That is, the movement of the opening 3c once expanded by the taper portions 4d and 4d to return to the normal state by the elastic force of the opening portion 3c is utilized, and the locking portion 3
b and 3b are fitted and locked in the locking grooves 4b and 4b.

As described above, the brush main body 4 becomes the brush holder 2
After being held therein by the temporary holding spring 3, the spring 5 is inserted into the brush holder 2 so that the one end side 5a of the spring 5 contacts the rear end surface 4e of the brush body 4. At this time, since the brush main body 4 is in the holding state, it does not move even if pressed by the spring 5. Then, only the spring 5 contracts, and after the other end side 5b is set in the brush holder 2, the bent wall portion 2d of the brush holder 2 is moved to the spring 5
The other end side 5b of the spring 5 is supported by the bent wall portion 2d.

By the above, the temporary holding of the brush main body 4 is completed. Then, next, after disposing a commutator (not shown) at a predetermined position, the temporary holding spring 3 is removed in a direction opposite to the direction in which the brush holder 2 is attached, whereby the brush main body 4 is removed.
The contact surface of the commutator will be moved toward the commutator by the urging force of the spring 5.

Next, a second embodiment of the present invention will be described with reference to FIGS.

The brush holder 6 is fixed to the plate 1 as in the first embodiment, and the upper surface 6 of the brush holder 6 is fixed.
A through hole 6b is formed in a. The temporary holding spring 7 is moved in the arrow D direction, and the temporary holding spring 7 is fixed to the brush holder 6. At this time, the engaging portion 7 of the temporary holding spring 7 is inserted into the through hole 6b.
b is inserted, and the temporary holding spring 7 clamps the brush holder 6 so that it is fixed.

Next, the brush main body 8 is inserted into the brush holder in the direction of arrow E. A locking groove 8b into which the locking portion 7b of the temporary holding spring 7 is fitted and locked is formed on the upper surface 8a of the brush body 8.

By the insertion, the one end surface 8c of the brush main body 8 comes into contact with the locking portion 7b of the temporary holding spring 7. Therefore, since a taper portion 7c is formed on the contact surface side of the locking portion 7b with the one end surface 8c as shown in FIG. 6, when the brush main body is inserted after the contact, the temporary holding spring 7 is formed.
When the locking portion 7b is gradually expanded (lifted upward in FIG. 7) and the locking groove 8b and the through hole 6b are aligned with each other, the locking portion 7b is moved by the elastic force of the temporary holding spring 7. When trying to return to the normal state, the locking portion 7b is fitted and locked in the locking groove 8b.

As described above, the brush main body 8 becomes the brush holder 6
After being held by the temporary holding spring 7, the structure is the same as that of the first embodiment, and the description thereof will be omitted.

In the first and second embodiments, the spring is inserted into the brush holder after the brush body is inserted, but the spring may be reversed. At this time, the brush main body is inserted against the urging force of the spring previously inserted and arranged, and the locking portion of the temporary holding spring is fitted and locked in the locking groove of the brush main body. The temporary holding of the brush main body in the holder is completed.

[Brief description of drawings]

FIG. 1 is a temporary holding state diagram in a first embodiment of the present invention, (a) is a sectional view taken along line XX of (b), (b) is a front view,
(C) is a side view.

FIG. 2 is a single view of the brush main body in the first embodiment of the present invention, (a) is a front view and (b) is a side view.

FIG. 3 is a single view of a brush holder according to the first embodiment of the present invention, (a) is a front view and (b) is a side view.

FIG. 4 is a unitary view of a temporary holding spring according to the first embodiment of the present invention.

FIG. 5 is a schematic diagram of a second embodiment of the present invention.

FIG. 6 is a view of Y- of a temporary holding spring according to a second embodiment of the present invention.
It is a Y sectional view.

FIG. 7 is an insertion schematic diagram of a brush main body according to a second embodiment of the present invention. (A) shows before temporary holding, and (b) shows the time of temporary holding completion.

FIG. 8 is a temporary holding state diagram showing a conventional brush temporary holding structure, (a) is a front view, and (b) is a ZZ sectional view of (a).

9A and 9B are unit views of a brush main body used in a conventional brush temporary holding structure, in which FIG. 9A is a front view and FIG. 9B is a side view.

10A and 10B are a single view of a brush holder used in a conventional temporary brush holding structure, in which FIG. 10A is a front view and FIG. 10B is a side view.

[Explanation of symbols]

 2, 6 Brush holder 2b, 6b Through hole 3, 7 Temporary holding spring 3b, 7b Locking part 4, 8 Brush main body 4b, 8b Locking groove 4d, 7c Tapered part 5 Spring

Claims (2)

[Claims] 1. A brush main body is inserted into a brush holder,
A temporary brush holding structure for holding the brush main body at a predetermined position in the brush holder when the brush main body is biased to the commutator side by the biasing means, and a penetrating hole formed on a side surface of the brush holder. A hole, a locking groove formed on a side surface of the brush body, and a locking portion having a biasing force toward the locking groove side and locking the locking groove via the through hole. An elastic locking member, and a sloped portion on the side surface of the brush body where the locking groove is formed, in which the brush body is tapered from the locking groove side toward the insertion end face side to the brush holder, A temporary brush holding structure characterized by being made of. 2. The brush main body is inserted into the brush holder,
A temporary brush holding structure for holding the brush main body at a predetermined position in the brush holder when the brush main body is biased to the commutator side by the biasing means, and a penetrating hole formed on a side surface of the brush holder. A hole, a locking groove formed on a side surface of the brush body, and a locking portion having a biasing force toward the locking groove side and locking the locking groove via the through hole. A temporary brush holding structure comprising: an elastic locking member; and an inclined portion formed on a side surface of the locking portion that faces an insertion end surface of the brush main body into the brush holder.