JPH07231616A - Brush holder and commutator motor provided with this brush holder - Google Patents

Abstract

PURPOSE:To eliminate a cross-over wire and to prevent the discontinuity of a field winding due to the vibration of a motor by a method wherein a springlike cutout is formed in a brush box and a terminal to which a field lead wire has been connected is inserted into the cutout part. CONSTITUTION:A springlike cutout 11 is formed in a brush box 1, and a terminal 3 to which a field lead wire has been connected is inserted into the cutout 11. A constitution in which the protrusion of a carbon brush is prevented by the springlike cutout 11 is formed, and the connecting operation of the brush to the field lead wire can be executed when a brush holder is assembled. Consequently, an inserting operation in the assembly of the brush and the connecting operation of a field lead wire in a final process are eliminated, a wire which crosses a space is eliminated, and it is possible to prevent the discontinuity of a field winding due to the vibration of a motor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commutator motor used for household electric appliances.

[0002]

2. Description of the Related Art In recent years, household electric appliances have been used more and more, and as a manufacturing side, there is an increasing demand for the development of an electric motor having better assembling ability and capable of handling a variety of products in small quantities.

A conventional electric motor will be described in detail below with reference to the drawings. FIG. 2 is a perspective view of a brush box 1 and a brush assembly 2 used in a conventional electric motor. In a conventional electric motor, a brush box 1 as shown in the figure is fixed to a brush holder plate or the like, and the brush holder is fixed to a bracket or the like. The thus constructed bracket is fixed to a field assembly or a bracket on the opposite side with through bolts or the like to form a motor assembly.

[0004]

However, in the above construction, since there is no brush at the time of assembly, it is necessary to insert the brush assembly into the brush box after the motor is assembled, and the field opening is required. Since it is not connected to the lead wire, connection work after assembly and fixing work such as soldering must be done, which not only deteriorates workability, but also the connection to the brush retainer is Since it is performed by a wire, there is a problem that the wire is broken due to the vibration of the motor.

In view of the above problems of the prior art, the present invention allows the work of connecting the brush and the field outlet to be performed at the time of assembling the brush retainer, and at the same time as incorporating the brush retainer, the carbon brush is automatically attached to the commutator. The structure that can be pressed against each other eliminates the insertion work of the brush assembly and the connection work of the field outlet wire in the final process, and the wire crossing the space is eliminated to break the field winding due to motor vibration. The purpose is to prevent.

[0006]

In order to solve the above problems, a brush holder according to the present invention has a structure in which a brush box is provided with a spring-like cutout, and the carbon brush is prevented from protruding by the spring-like cutout. By inserting a terminal to which the field lead wire is connected to the cutout part, the connection with the brush and the fixation of the protrusion of the carbon brush are released. The structure is such that connection work with the magnetic outlet wire can be performed, and at the same time when the brush holder is installed, the carbon brush can be automatically brought into pressure contact with the commutator.

[0007]

According to the above construction, the insertion work of the brush assembly and the connection work of the field outlet wire are eliminated in the final process, and the line crossing the space is eliminated, so that the disconnection of the field winding due to the vibration of the motor is prevented. It is possible to provide a brush holder capable of

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1A shows a brush box 1 according to the present invention.
FIG. FIG. 1 (b) is a perspective view showing a state in which the field terminal 3 is placed in the brush box according to the present invention. Figure 1 (a)
Reference numeral 11 denotes a spring-shaped notch portion, which is pressed by the carbon brush to prevent the protrusion. Figure 1 (b)
FIG. 4 is a perspective view showing a state where a terminal to which a field outlet wire is connected is inserted into the brush box, and the brush is disengaged because the fixing of the brush by the spring-shaped cutout portion is released.

The brush holder of the present invention is constructed by fixing the above-mentioned brush box to a brush holder plate or the like. The configuration of the motor is the same as that of the conventional electric motor.

[0011]

As described above, according to the present invention, it is possible to perform the work of connecting the brush and the field lead wire at the time of assembling the brush holder, and at the same time as incorporating the brush holder, the carbon brush is used as a commutator. Since it has a structure that can be automatically pressure-contacted to the machine, it eliminates the work of inserting the brush assembly and the work of connecting the field exit line in the final process, and by eliminating the line that crosses the space, the field winding caused by motor vibration is eliminated. It is possible to provide a brush holder that can prevent wire breakage.

[Brief description of drawings]

FIG. 1A is a perspective view of a brush box according to an embodiment of the present invention. FIG. 1B is a perspective view of a brush box according to an embodiment of the present invention in which field terminals are inserted and fixed.

FIG. 2 is a perspective view of a brush box and a brush assembly of a conventional electric motor.

[Explanation of symbols]

 1 Brush box 2 Brush assembly 3 Field terminal 11 Spring-shaped notch

Claims (2)

[Claims] 1. A brush holder provided with a brush box having a spring-shaped notch. 2. A commutator motor comprising a brush holder having a spring-shaped notch.