JPH05168190A - Magnet motor - Google Patents

Abstract

PURPOSE:To prevent vibration and prevent the characteristic fluctuation of a motor and breakdown of a brush holder mounting board. CONSTITUTION:This motor is provided, at the end of an opening, with a cut 3 with a small width, with which the projection 2 provided at a brush holder mounting board engages, and a cut 18 with a large width, with which the projection 17 provided at a bracket engages, and further this is equipped with a frame 4, in which an armature is accommodated, and the engaging face of the cut 3 with a small width is tapered 5, and the projection 2 of the brush holder mounting board is press-fit lightly for fixation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet motor used in electrical equipment and the like.

[0002]

2. Description of the Related Art In recent years, along with the development of car electronics, the number of actuators has increased rapidly, and magnet motors have been increasingly used.

A conventional magnet motor will be described with reference to FIGS. As shown in the drawing, a small width cutout portion 15 into which the protrusion 14 provided on the brush holder mounting substrate 13 fits into the opening end portion of the frame 12 in which the armature 11 is provided, and the protrusion portion provided on the bracket 16. A plurality of cutouts formed by a large cutout 18 into which 17 is fitted are provided at a plurality of target positions, and after the projection 14 of the brush holder mounting substrate 13 is fitted into the narrow cutout 15, the projection 17 of the bracket 16 is removed. The brush holder mounting substrate 13 is fitted in a large notch portion 18, and is clamped and fixed by the frame 12 and the bracket 16.

[0004]

In such a conventional magnet motor, the protrusion 1 of the brush holder mounting substrate 13 is used.
The fitting surface of No. 4 and the fitting surface of the narrow cutout portion 15 provided in the frame 12 so that the projection 14 fits are shown in FIG.
Since it is formed by a surface parallel to the axial direction to be fitted as shown in Fig. 3, a gap 19 may be formed between the inner surface of the narrow cutout portion 15 and the outer surface of the protrusion 14 of the brush holder mounting substrate 13. Therefore, when the motor is operated, noise or vibration is generated due to rattling due to the gap 19.
Also, due to the change in contact between the brush and the commutator (not shown),
Brush holder mounting board 1 due to fluctuations and vibrations of motor characteristics
There was a problem that the strength of No. 3 was lowered and it was damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a magnet motor capable of preventing vibrations and preventing fluctuations in motor characteristics and damage to the brush holder mounting substrate.

[0006]

In order to achieve the above-mentioned object, the magnet motor of the present invention is provided with a narrow cutout portion for engaging a protrusion provided on a brush holder mounting substrate and a protrusion provided on a bracket. A large notch that fits together is provided at the opening end, and a frame for accommodating the armature is provided inside, and the engagement surface of the notch with the small width is tapered, and the protrusion of the brush holder mounting substrate is It is configured to be lightly pressed in and fixed.

[0007]

According to the present invention, since the projection of the brush holder mounting substrate is lightly press-fitted and fixed to the taper surface of the narrow cutout formed in the frame, the brush holder mounting substrate is attached to the frame. It is fixed without being generated, vibration due to rattling is eliminated, and characteristic fluctuation due to brush position fluctuation and damage to the brush holder mounting substrate are prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. The same parts as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. As shown in the figure, the opening 2 is provided with a small-width notch 3 with which the protrusion 2 provided on the brush holder mounting substrate 1 engages, and a large notch 18 with which the protrusion 17 provided on the bracket 16 engages. The frame 4 is formed by providing a plurality of the target positions.

Then, a taper surface 5 in the axial direction is formed on the engagement surface of the notch 3 having a small width with which the projection 2 provided on the brush holder mounting substrate 1 engages, and the minimum width on the inner side of the taper surface 5 is formed. The size is such that the protrusion 2 can be lightly press-fitted.

In the above structure, when the brush holder mounting substrate 1 and the bracket 16 are mounted on the frame 4, the protrusion 2 of the brush holder mounting substrate 1 is fitted into the narrow cutout portion 3 provided on the frame 4 and lightly press-fitted. By doing so, the protrusion 2 of the brush holder mounting substrate 1 has the narrow cutout 3
The brush holder mounting substrate 1 is press-fitted along the inner side of the tapered surface 5 and is held without rattling the frame 4.

Then, the protrusion 17 of the bracket 16 is fitted into the large notch 18 of the frame 4, and the brush holder mounting substrate 1 is pressed and fixed to the frame 4 side.

[0012]

As is apparent from the above embodiments, according to the present invention, the engaging surface of the notch provided in the frame with which the protrusion of the brush holder mounting substrate engages is formed in a tapered shape,
Since the protrusion is held in the notch by light press-fitting, the brush holder mounting substrate is held against the frame without rattling, preventing the occurrence of noise and vibration due to rattling, and the contact position between the brush and the commutator. It is possible to provide a magnet motor that can prevent fluctuations in motor characteristics due to changes in the temperature and damage to the brush holder mounting substrate due to vibration.

[Brief description of drawings]

FIG. 1 is a side view showing an attachment state of a brush holder attachment substrate of a magnet motor according to an embodiment of the present invention.

FIG. 2 is a side view of the frame.

FIG. 3A is a side view of the same brush holder mounting substrate, and FIG. 3B is a front view of the same brush holder mounting substrate.

FIG. 4A is a side view of the bracket, and FIG. 4B is a front view of the bracket.

FIG. 5 is a side view showing a mounting state of a brush holder mounting substrate of a conventional magnet motor.

FIG. 6 is a side view of the frame.

FIG. 7 is an end view of the frame.

FIG. 8 is a side view of the armature.

FIG. 9A is a side view of the same brush holder mounting substrate, and FIG. 9B is a front view of the same brush holder mounting substrate.

FIG. 10A is a side view of the bracket, and FIG. 10B is a front view of the bracket.

[Explanation of symbols]

 1 Brush holder mounting board 2, 17 Projection 3 Small width notch 4 Frame 5 Tapered surface 16 Bracket 18 Large notch

Claims (1)

[Claims] 1. A notch with which a protrusion provided on a brush holder mounting substrate engages and a notch with which a protrusion provided on a bracket fits are provided at an opening end, and an armature is housed inside. A magnet motor having a frame, the engaging surface of a notch engaging with a protrusion provided on the brush holder mounting substrate is tapered, and the protrusion of the brush holder mounting substrate is lightly press-fitted and fixed. .