JPS582130Y2 - brush retainer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a brush retainer for a commutator motor, and an object of the present invention is to provide a brush retainer for a commutator motor, which can be easily assembled and automatically assembled into a motor.

Conventionally, this type of brush holder has a commutator penetration hole 2 in the center of a brush holder plate 1 made of a phenolic resin laminate, as shown in FIGS. 1 and 2, to house the brushes. The U-shaped brush boxes 3, 3' made of brass plates are crimped and attached to the brush holder plate 1, and the noise prevention capacitor 4 is also mounted on the brush holder plate 1. Ta.

Therefore, the U-shaped brush boxes 3, 3' are arranged symmetrically with respect to the commutator penetration hole 2, and without eccentricity, the brush retainer plate 1
Because it had to be attached to a holder, a special jig was used to swage it, but this required a large amount of man-hours.

In addition, in order to fix the lead wire of the noise prevention capacitor 4 arranged and attached to the surface of the brush holder plate 1, a separate terminal must be provided on the brush holder plate 1, and the brush holder plate 1 must be provided with a separate terminal. Not only did the configuration of 1 itself become complicated, but the number of parts increased.

In addition, when assembling the motor, the field wires, the lead wires of the noise prevention capacitor 4, and the small spacing pieces 5.5'
, 6.6' had the disadvantage of requiring a lot of effort and time to handle.

The present invention solves the above-mentioned conventional drawbacks, and one embodiment of the present invention is shown in FIG.

In the figure, reference numeral 7 denotes a brush holder plate obtained by resin molding, and this brush holder plate γ has recesses 8 integrally provided at positions (two locations) symmetrical to the center of the commutator penetration hole 2.
．． 8', and protrusions 9, 9' integrally provided on both sides near the recesses 8, 8'.

Further, the brush retainer plate 7 is integrally provided with two cylindrical protrusions 10 and 10' necessary for assembly into an electric motor.
and a groove 11 for positioning the noise prevention capacitor.
are integrated.

Reference numerals 12 and 12' denote top plates made of a conductive material that are attached to the upper surfaces of the recesses 8 and 8' and form a rectangular tube for storing brushes together with the recesses 8 and 8'. , openings 13, 13' provided at one end bent at right angles.
, holes 14 , 14 ′ to be engaged with the projections 9 , 9 ′, terminals 15 , 15 ′ for connecting field lead wires, and terminals 16 , 16 ′ for connecting lead wires of the noise prevention capacitor 4 . have.

The openings 13, 13' are for inserting the brushes into the rectangular tube formed by the recesses 8, 8' and the top plates 12, 12' from the side of the finished brush holder.

17 and 17' are the top plates 12 and 12 attached to the projections 9 and 9'.
This is a spring plate nut for fixing the top plate 12.degree. 12' by engaging it from above after the holes 14, 14' are engaged.

Incidentally, the connection of the IJ-wire etc. of the capacitor 4 to the terminals 16, 16' etc. may be performed by caulking or welding the lead wires.

Further, the upper end portions 18, 18' of the cylindrical protrusions 10, 10' provided integrally with the brush retainer plate 7 are provided with conventional spacing pieces 5.5' (Fig. 1) when assembled into an electric motor. ).

Further, in the above embodiment, the top plates 12, 12' and the brush holder plate 7 are fixed using spring plate nuts 17°17', but the top plate 12°1z is not electrically conductive. If a spring plate is used and the holes 14, 14' themselves have the function of a spring plate nut, the above-mentioned spring plate nut 17 can be omitted.

Since the brush holder of the present invention has the above-described configuration, it has the following effects.

■ The rectangular tube for storing the brushes is formed by the recesses 8, 8' integrally provided in the resin-molded brush holder plate 7 and the top plates 12, 12' attached to these recesses, so that the rectangular tube can be placed in the rectangular tube position. No eccentricity and good dimensional stability.

■ Since the top plates 12, 12', etc. can be attached to the brush holder plate 7 only by the vertical movement process,
Easy automatic assembly.

■ When incorporated into an electric motor, the cylindrical protrusions 10, 10', which correspond to conventional spacing pieces, are integrally provided on the brush retainer plate 7, which has a great effect on reducing man-hours.〇■ Noise Terminals 16, 16 are provided integrally on the top plates 12, 12' to connect the lead wires, etc. of the prevention capacitor 4.
', etc., and there is no need to separately provide a connection terminal for this purpose as in the conventional case, and the number of parts can be reduced, resulting in cost reduction.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a conventional brush holder, FIG. 2 is a sectional view taken along line 1-I in FIG. 1, and FIG. 3 is an exploded perspective view of a brush holder according to an embodiment of the present invention. . 2...Commutator penetration hole, 4...Capacitor, 7...Brush retainer plate, 8.8'...
... recess, 9, 9'... protrusion, 10, 10
'...Protrusion, 11...Groove, 12゜12
'...Top plate, 13, 13'...Opening, 14°14'...Hole, 16,16'...
...Terminal for connecting lead wires.

Claims (1)

[Claims for Utility Model Registration] 1. A commutator through hole, protrusions provided on both sides near a recess for storing brushes provided at symmetrical positions around the center of the commutator through hole, and an electric motor. A brush holder plate is provided, in which a cylindrical protrusion necessary for assembly is integrally formed by resin molding, and a rectangular tube for covering the recess and storing the brush is formed on the upper surface of the recess of the brush holder plate. A top plate is attached, the top plate having a flat part that is bent at right angles to the flat part, and an opening for inserting a brush into the rectangular tube that communicates with the recess formed in the end bent at right angles to the flat part. A brush holder comprising a plate provided with a hole to be engaged with the protrusion and a lead wire connection terminal. 2. A utility model in which a groove for positioning a noise prevention capacitor is integrally provided on the brush retainer plate, and the lead wire of the noise prevention capacitor held in the groove is connected to a lead wire connection terminal on the top plate. A brush holder according to claim 1.