Motor and connection structure of end covers and bearings thereof

Abstract

The invention discloses a connection structure of end covers and bearings. Each end cover is provided with a bearing cavity for accommodating a corresponding bearing. Annular accommodating parts are formed between the inner walls of the bearing cavities and the outer surfaces of the bearings. Precompression elastic support parts are arranged in the annular accommodating parts, and radial gaps are arranged between the bearing cavities and the bearings. Through an optimization design, deformation of bearing bores after assembly completion is not generated so that cooperation of the bearings with a rotating shaft is not affected and thus happening of a jamming phenomenon in an operation process of a motor is prevented completely. At the same time, the elastic connectors between the end covers and the bearings are capable of using deformable characteristics to realize automatic self-aligning so that coaxiality of the members is ensured and a reliable guarantee is provided to reduction of work noises and vibration of the motor. On the basis, the invention provides the motor which applies the connection structure.

Description

technical field [0001] The invention relates to the structural technology of a driving motor, in particular to a motor and its end cover bearing connection structure. Background technique [0002] As the power source of the liquid medium circulation system, the driving motor of the circulating pump must adopt a shielded structure to ensure the stability of the operation without leakage. In the prior art, the motor shaft rotating synchronously with the internal rotor is connected to the external stator through the upper and lower end covers respectively to achieve relative sealing. [0003] See figure 1 , which shows a schematic diagram of the assembly relationship of the existing motor shaft, bearing and end cover. [0004] As shown in the figure, the rotating shaft 10 is connected with the end cover through the bearing 20 . Wherein, the bearing 20 is press-fitted into the end cover 30 obtained by machining, which is limited by the structure of the bearing and the end cov...

AI Technical Summary

Problems solved by technology

First of all, during the press-fit process between the bearing and the end cover, the inner hole of the bearing is deformed, and the deformation amount and deformation form are not easy to control, so that there is a deviation in the matching gap between the inner hole of the bearing and the rotating shaft, and the end cover 30 passes through the stator (in the figure not shown), the other end cover is assembled with the rotating shaft 10, thus, there is a risk of jamming during the operation of the motor

Secondly, the end cover 30 is machined, and the machining accuracy and dimensional tolerance directly affect the interference fit relationship between it and the bearing, and the coaxiality is poor, which may cause excessive noise and vibration of the motor

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