Transmission device between working component and rotor of permanent magnetism synchronous electric machine

Abstract

The invention discloses a transmission device between the rotor of a permanent magnet synchronous motor and a working component. The transmission device includes a shaft sleeve which is connected with a rotor shaft, a starting tendon which protrudes out of the side wall of the pipe-shaped main body of the shaft sleeve, a working component with a holding cavity for holding the shaft sleeve, a first limit tendon which protrudes out of the inner wall of the holding cavity of the working component, and a shock absorption block which is held in the holding cavity, wherein, an anti-collision gap isarranged between the top face of the starting tendon and the top face of the first limit tendon so as to prevent the starting tendon from colliding or fractionating the first limit tendon when the shaft sleeve rotates along with the rotor shaft. The device has the technical effect of large free stroke of the shaft sleeve, thus having good low-voltage starting performance.

Description

technical field [0001] The invention relates to a shaft coupling of a permanent magnet synchronous motor, in particular to a transmission device between a rotor and a working member of the permanent magnet synchronous motor. Background technique [0002] US Patent Application Publication No. US2005 / 0111992 discloses a centrifugal drain pump for household appliances. This drainage pump is developed to solve the problems of heavy load and easy burning of the motor when the pump is started, and it mainly improves the starting connection between the shaft sleeve and the impeller. As shown in the drawings of the patent, the patent sets the starting ribs on the shaft sleeve, and sets a limiting rib on the inside of the impeller outwards, wrapping the two sides of the axial radiation of the starting ribs and the limiting ribs. A layer of elastic material is added to reduce noise and absorb shock. However, this design is more complicated, resulting in higher production costs and m...

AI Technical Summary

Problems solved by technology

However, when the rotor rotates, it may vibrate in the axial direction, so that the actuating rib 32a also vibrates in the axial direction, causing the actuating rib 32a to directly collide with the limiting ribs 34a, 34b to generate noise.

In addition, due to the presence of two symmetrically arranged limiting ribs 34a and 34b, the free travel or free rotation angle of the sleeve is also limited.

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