Constant pressure carbon brush hold-down device for electric machine
A pressing device, constant pressure technology, applied in circuits, current collectors, electrical components, etc., to achieve the effects of noise reduction, life extension, and heat generation reduction
Inactive Publication Date: 2005-05-25
TSINGHUA UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problem that the pressure on the carbon brushes of DC motors is basically kept constant during the wear process, and to provide a constant pressure pressing device for carbon brushes of motors
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[0016] figure 1 Shown is a schematic diagram of a carbon brush pressing device using a helical compression spring spring in the prior art. The helical compression spring 6 is placed in the brush holder 5 to support the tail of the carbon brush 4, and the carbon brush can slide in the brush holder. The head is in contact with the commutator 3 on the motor rotor. The carbon brush lead wire 7 is connected with the carbon brush 4, and it is a channel for current input and output.
[0017] figure 2 Shown is a schematic diagram of a carbon brush pressing device using a helical torsion spring in the prior art. One end of the torsion spring 8 bears against the tail of the carbon brush 4 , and the other end of the torsion spring 8 is fixed by a torsion spring frame 9 .
[0018] In the above two solutions in the prior art, during the process of carbon brush wear, the pressure on the carbon brush changes greatly, which will cause a series of problems.
[0019] An embodiment of the pr...
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A motor carbon brush constant pressure pressing device belongs to the field of design of structural parts of electromechanical products, and in particular relates to the field of design of structural parts of motors. In order to solve the problem that the pressure on the carbon brush of a DC motor is required to be kept basically constant during the wear process, the invention discloses a constant pressure pressing device for a carbon brush of a motor, which includes a carbon brush and an elastic member placed in a brush holder, It is characterized in that the elastic member is a supporting spring, and the supporting spring contains a helical coil body, and a rotating arm protrudes from both ends of the coil body, and the lengths of the two rotating arms are equal, and the two rotating arms The end of the arm has a positioning structure, and is respectively supported on the carbon brush tail and the motor body. Using the present invention on a DC motor can improve efficiency, reduce noise, reduce calorific value, and greatly prolong the life of the motor.
Description
technical field [0001] A motor carbon brush constant pressure pressing device belongs to the field of design of structural parts of electromechanical products, in particular to the field of design of structural parts of motors. Background technique [0002] DC motors are divided into two categories: brushed and brushless motors. Among them, brushed DC motors realize the commutation of current through the contact of carbon brushes and commutators. In order to ensure that the carbon brush is always in contact with the commutator during wear, a spring is generally installed at the end of the carbon brush. During the wear of the carbon brush, the spring always pushes the carbon brush forward to withstand the surface of the commutator to ensure the smooth flow of electricity. . [0003] There are two types of traditional carbon brush springs: helical compression spring and helical torsion spring. Both spring modes of action have a common disadvantage, that is, at the beginning ...
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IPC IPC(8): H01R39/02H01R39/40H01R39/415
Inventor 黄靖远黄晓晗堵广智权英华居秀芹邹伯南
Owner TSINGHUA UNIV