A motor shaft extension sealing structure and motor

Abstract

The invention provides a motor shaft extension seal structure and a motor. The motor shaft extension seal structure comprises an end cover (1), a sealing ring (2) and a rotating shaft (3). The end cap(1) has a protrusion (4) located at its axial end; One axial end of the sealing ring (3) sleeves the rotating shaft (3), and the other end extends toward the protrusion (4), and sleeves the outer periphery of the protrusion (4); And the sealing ring (3) can be driven to rotate together by the rotating shaft (3), and relative rotation exists between the sealing ring (2) and the protrusion (1). Adynamic seal can be formed between the sealing ring and the end cap, The invention prevents liquid or solid from entering the end cap, realizes higher seal protection grade to the thin-wall end cap, improves the seal effect, and can make the motor end cap relatively thin under the premise of guaranteeing the performance because of the improvement of the seal performance, which is beneficial to miniaturization of the motor and compression of the motor cost.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a motor shaft extension sealing structure and a motor. Background technique [0002] At present, miniaturization, high reliability and low cost are one of the development directions of motors. Especially as the application range of the motor becomes wider and wider, it is the goal of motor design to improve the reliability of the motor (such as the protection level) as much as possible under the premise of ensuring miniaturization and low cost. [0003] The dynamic seal design of the motor shaft extension is one of the difficulties in the motor protection design. At present, for high protection structures (level 5 and above), generally adopt figure 1 structure shown. Its main disadvantage is that the dynamic seal is installed in the end cover (casing) of the motor, which has high requirements for the roughness and structural accuracy of the mating surface of the end ...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor sealing effect and low protection level in the motor shaft extension sealing structure of the thin-walled end cover in the prior art, thereby providing a motor shaft extension sealing structure and a motor shaft extension sealing structure.

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