JPH0588173U - Brush holder for commutator motor - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a brush holder for a commutator motor, in which a brush tube is held by an insulating member so that the brush tube can be inserted into a hole provided in the insulating member. By providing a locking mechanism that can be achieved at the same time, the assemblability of the brush holder is improved. [Structure] The present invention mainly includes a brush tube 7 and a claw 7.
(A), flange 7 (b), high senglock (A) 1
9, hole 19 (a), groove 19 (c), flange seat 19
(D) and side walls 19 (e) and 19 (f).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brush holder for a commutator motor.

[0002]

[Prior Art]

 An embodiment of the prior art will be described with reference to FIGS.

In the conventional technique, in order to hold the brush tube 30 by the insulating member 31, as shown in FIG. 7, the claw 30 a provided on the brush tube 30 inserted into the hole 32 of the insulating member 31 is folded back. Alternatively, after the work of inserting the brush tube into the hole, such as caulking a part of the brush tube 30 (not shown), one or more more steps are required.

[0004]

[Problems to be solved by the device]

 In the conventional technology, assembly of the brush retainer requires a work of one or more steps after the work of inserting the brush tube into the hole of the insulating member, resulting in a problem that the assembly is troublesome. ..

An object of the present invention is to eliminate the above-mentioned problems of the conventional technology and to construct a brush holder for a commutator motor that is easy to assemble.

[0006]

[Means for Solving the Problems]

 The above object is achieved by providing the brush tube and the insulating member with a locking mechanism such that the holding of the brush tube by the insulating member can be achieved at the same time as the work of inserting the brush tube into the hole provided in the insulating member. It

[0007]

[Action]

 With the brush retainer of the commutator motor configured as described above, at the same time as the work of inserting the brush tube into the hole of the insulating member, the locking mechanism provided on the brush tube and the insulating member is activated, and the brush tube Are held by the insulating member.

[0008]

【Example】

 One embodiment of the present invention is shown in FIGS.

FIG. 4 is a partial cross-sectional top view of an electric disk grinder according to the present invention. In the figure, a rotor 2 of a commutator motor 1 is axially supported in a housing 3, and its rotation is transmitted to a grindstone 4 fixed to an output shaft via a speed reducer. The end of the rotor winding 5 is connected to a commutator 6 fixed on the rotor 2, and the diameter of the commutator 6 is fixed to the outer circumference of the commutator 6 by a brush tube 7 held in a Heisen block kumi 16. A brush 9 held so as to be slidable in the direction and biased by a spring 8 is in contact. The other end of the copper wire 10 whose one end is connected to the brush 9 is connected to the disk-shaped stop piece 11, and the stop piece 11 is in contact with one end of the spring 8 and is attached to the end surface of the brush tube 7 by the Heisen block. The brush cap 12 screwed into the kumi 16 presses it. Further, one end surface of the stator 13 which is perpendicular to the axial direction of the stator 13 is brought into contact with the stator receiving seat 14 and is inserted from the other end surface side of the stator 13 by the screw 15 screwed into the stator receiving seat 14. The end of a stator winding (not shown) fixed in the housing 3 and wound around the stator 13 is connected to the high-sen block kumi 16 and electrically connected to the stator winding and the rotor winding 5. The connection is made.

The Hi-Seng lock Kumi 16 described above is sandwiched between the housing 3 and the tail cover 17, and a Heisen cover 18 is fitted to hold interior parts and prevent dust.

FIG. 1 is a partial cross-sectional top view of a Heissen block kumi 16, which shows a preferred embodiment of the present invention. The Heisen block Kumi 16 includes a Bisen block (A) 19, which is two legs that hold the brush tube 7, a Heisen block (B) (not shown), and a Heisen block (C) that connects both legs (illustration). 1) shows the bisene block (A) 19 side thereof.

As shown in FIG. 3, the brush tube 7 is provided with a claw 7 (a) and a flange 7 (b), and the brush tube 7 is fixed to the claw 7 (a) and the high senglock (A) 1. When the side wall 19 (b), which is one of the side walls forming the hole 19 (a) of FIG. 9, is aligned and inserted into the hole 19 (a) from the right side of FIG. ) Contacts the end of the side wall 19 (b), but the claw 7 (a) is formed so as to project more than the side wall 19 (b), so that the elastically deformed state along the side wall 19 (b). Will be inserted in.

When the claw 7 (a) is further inserted and reaches the groove 19 (c) provided in the side wall 19 (b), the claw 7 (a) is deformed to the position of the bottom of the groove 19 (c). Is alleviated.

Further, the insertion is advanced until the flange 7 (b) and the flange seat 19 (d) come into contact with each other, and the state shown in FIG. 1 is obtained.

At this time, since the groove 19 (c) is provided so that the elastically deformed state of the claw 7 (a) is not completely released, the brush tube 7 has the groove 19 (c) with the groove 19 (a). It is pressed against the side wall 19 (e) opposite to the side wall 19 (b) by the reaction force received from (c), and does not rattle in the hole 19 (a). Further, the flange 7 (b) and the flange seat 19 (d), and the claw 7 (a) and the side wall 19 (f) of the groove 19 (c) are engaged with each other to prevent the brush cheve 7 from coming off. The holding of the brush tube 7 by A) 19 is achieved at the same time as the work of inserting the brush tube 7 into the hole 19 (a).

Although the present embodiment has been described with respect to the electric disk grinder, the present invention can be applied to a single commutator motor or other electric equipment including the commutator motor.

[0017]

[Effect of the device]

 According to the present invention, the brush tube and the insulating member are provided with a locking mechanism so that the holding of the brush tube by the insulating member can be achieved at the same time as the work of inserting the brush tube into the hole provided in the insulating member. It is possible to construct a brush holder for a commutator motor that is easy to assemble.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional top view showing an embodiment of the present invention.

2A is a cross-sectional top view of the Heisen block (A), and FIG. 2B is a right side view.

3A is a front view of a brush tube, and FIG. 3B is a right side view.

FIG. 4 is a partial cross-sectional top view of an electric disk grinder according to the present invention.

5A is a front view of a conventional brush tube, and FIG. 5B is a right side view.

FIG. 6A is a front view of an insulating member according to a conventional technique,
(B) is a right side view of the half section.

7A is a front view showing an embodiment according to a conventional technique, and FIG. 7B is a right side view of a half section.

[Explanation of symbols]

1 to 4, 1 is a commutator motor, 7 is a brush tube, 16 is a high senglock kumi, 19 is a high sen block (A), 19 (a) is a hole, 19 (b) is a side wall, 19 (c). ) Is a groove, 19 (d) is a flange seat, 19
(E) and 19 (f) are side walls, 7 (a) is a claw, and 7 (b) is a flange.

Claims (1)

[Scope of utility model registration request] 1. A brush holder for a commutator motor, comprising a brush tube, in which a brush slides and moves inside, inserted into and held by a hole provided in an insulating member, wherein the insulating member holds the brush tube. However, the brush holder of the commutator motor is characterized in that a locking mechanism that is achieved at the same time as the work of inserting the brush tube into the hole is provided in the brush tube and the insulating member.