DC motor and rubber cover assembly thereof

Abstract

The invention discloses a DC motor and a rubber cover assembly thereof. The rubber cover assembly comprises an insulated rubber cover main body, wherein two carbon brush chambers used for placing carbon brushes are arranged on an end face of an inner side of the rubber cover main body along the radial direction, the rubber cover assembly further comprises two torsional springs, a rectifier bridge,and a PPTC, the two torsional springs are respectively arranged corresponding to the carbon brushes in the two carbon brush chambers and are provided with a first pin and a second pin, the rectifierbridge is connected with an outer wall of the rubber cover main body and is provided with a first AC pin, a second AC pin, a positive electrode pin and a negative electrode pin, the positive electrodepin is electrically connected with the first pin of one torsion spring, the negative electrode pin is electrically connected with the first pin of the other torsion spring, the PPTC is connected withan outer wall of the rubber cover main body and is provided with an input pin and an output pin, and the output pin is electrically connected with the first AC pin. The rubber cover assembly is advantaged in that the pins of the rectifier bridge are directly and electrically connected with the pins of the torsion springs and the pins of the PPTC, the structure is simple, the manufacturing cost iseffectively saved, damage to elements caused by welding can be prevented, reliability of performance is guaranteed, and production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a DC motor and its rubber cover assembly, in particular to a DC motor and its rubber cover assembly used on an air bed or an air mattress. Background technique [0002] Existing motors are equipped with rectifier bridges and PPTC protectors in order to obtain safe and reliable operation characteristics. The traditional connection methods of these electronic components are to solder them to circuit boards separately, and then install the circuit boards in rubber covers. For example, the utility model patent No. 201821238429.4 discloses a combination of a DC motor rubber cover and a circuit board. A storage box is arranged on the side of the storage box, and card slots are symmetrically provided on the two inner sides of the storage box. [0003] The combination of the rubber cover and the circuit board, such as the rectifier bridge and the protector, are fixed on the circuit board by welding. There are many connecting lines, th...

AI Technical Summary

Problems solved by technology

[0003] The combination of the rubber cover and the circuit board, such as the rectifier bridge and the protector, are fixed on the circuit board by welding. There are many connecting lines, the structure is complicated, the manufacturing process is very complicated, and a lot of labor costs are wasted. , and the welding temperature is very high, the solder is easy to damage the components, especially the high temperature generated during the welding process will have an annealing effect on the spring on the rubber cover, resulting in weakened deformation of the spring, and the spring is used to drive the carbon brush, and then The carbon brush cannot be in good contact with the rotor, and the sparks become larger during operation, or even burn out

In addition, the plastic cover is provided with a storage box on the side, which takes up a lot of space

[0004] To sum up, the combination of the rubber cover and the circuit board of the existing motor has complex structure, complex production process, high production cost, and poor reliability

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