Direct-current brush motor

Abstract

The invention discloses a direct-current brush motor. A PCB comprises a carbon brush circuit board and a Hall circuit board which are arranged on the two sides of a carbon brush holder, and a BDLEMI filter is welded to the surface, away from the output end of a motor shaft, of the carbon brush circuit board through a chip mounter; one end of a power supply positive wire, one end of a power supply negative wire, the other end of the first carbon brush connecting wire and the other end of the second carbon brush connecting wire are all welded with the carbon brush circuit board by wave soldering; a plurality of flat Hall elements tightly attached to the surface of the Hall circuit board close to a magnetic ring are welded on the surface of the Hall circuit board by adopting the chip mounter, the magnetic ring is arranged at the output end of the motor shaft, and the magnetic ring is axially magnetized; each Hall element is electrically connected with a plurality of signal lines through a first junction box which is fixed on the Hall circuit board in advance; and a metal screw rod grounded with the carbon brush circuit board and the Hall circuit board fastens the two metal end covers on the grounded metal shell. The carbon brush assembly of the direct-current brush motor is simple and rapid to assemble, high in production efficiency and capable of greatly improving the product yield on a production line.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a DC brushed motor. Background technique [0002] The DC brushed motor in the prior art generally includes a carbon brush assembly, and the carbon brush assembly generally includes a carbon brush holder of insulating material such as plastic, a carbon brush and a PCB board installed on the carbon brush holder. [0003] There are many types of brushed DC motors in the prior art, and the structures are different, but there are still the following deficiencies: the components of the carbon brush assembly are relatively large, such as the power supply filter circuit generally uses multiple common mode inductors such as two plus multiple Composed of three filter capacitors, the wiring is more complicated, there are many connection points between the components and the PCB board, and objectively, only single-point welding can be used; multiple signal lines and the PCB board also need to...

AI Technical Summary

Problems solved by technology

[0003] There are many types of brushed DC motors in the prior art, and the structures are different, but there are still the following deficiencies: the components of the carbon brush assembly are relatively large, such as the power supply filter circuit generally uses multiple common mode inductors such as two plus multiple Composed of three filter capacitors, the wiring is more complicated, there are many connection points between the components and the PCB board, and objectively, only single-point welding can be used; multiple signal lines and the PCB board also need to be welded during assembly; the Hall element uses plug-in welding. Welding after connecting, the welding process is relatively complicated; the grounding of the PCB board and the fixing of the PCB board and the shell are respectively fixed by grounding wires and screws; the combination of the above factors causes the prior art DC brushed motor to be in the process of assembling the carbon brush assembly. The employees feel that the structure is complicated and difficult to understand, there are many operation steps, the assembly process is cumbersome, the production efficiency is low, and the product output on the production line is low. This has become an urgent technical problem to be solved on the DC brushed motor production line.

[0004] At the same time, due to the above reasons, the labor cost and material cost of assembly are relatively high, the volume of carbon brush assembly and motor are relatively large, and the product quality of carbon brush assembly and DC brush motor needs to be improved, such as temporary spot welding during assembly Soldering the signal wires in this way, the soldering points are easy to fall off, the signal wires are easy to confuse each other, and it is easy to make mistakes

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