Bearing preloading device for electric motor

Abstract

The invention relates to a bearing preloading device for an electric motor. The bearing preloading device comprises a motor shaft, a bearing outer cover, an end cover, a bearing and a bearing inner cover, wherein the bearing inner cover is mounted on the motor shaft; the bearing supports the motor shaft; the end cover is fixed on an outer ring of the bearing; the bearing outer cover is mounted in the end cover; and the bearing outer cover and the bearing inner cover are connected and fixed by using hexagon bolts. The bearing preloading device is characterized by further comprising bearing springs and a bearing gasket; four bearing springs are mounted on the bearing outer cover of the motor; the bearing gasket is mounted on the outer side of the bearing; and the bearing springs are contacted with the bearing gasket. According to the bearing preloading device, the structure is simple and reasonable, the assembly is convenient, few parts exist, and on the basis that any assembling manner of an original electric motor is not changed, four circular holes used for installing the bearing springs are formed in the bearing outer cover, so that the preloading function for the bearing of the electric motor can be realized more conveniently.

Description

technical field [0001] The invention relates to a bearing pre-tightening device, in particular to a bearing pre-tightening device for an electric motor. Background technique [0002] As the connecting device between the static part and the rotating part of the motor, the quality of the bearing and its operation in use will directly determine the life of the motor. Bearing failures account for more than 1 / 2 of all motor failures. Applying a certain preload to the axial direction of the bearing is an effective measure to prevent damage to the bearing, and can also reduce the vibration and noise of the motor. Most of the motors produced in China now use wave springs to apply preload to the axial direction of the bearing. force, so as to protect the motor bearings and greatly extend the life of the motor. However, as the center height of the motor has increased in recent years, the bearings used in the motor have also become larger and larger. The original wave spring has been ...

AI Technical Summary

Problems solved by technology

Applying a certain preload to the axial direction of the bearing is an effective measure to prevent damage to the bearing, and can also reduce the vibration and noise of the motor. Most of the motors produced in China now use wave springs to apply preload to the axial direction of the bearing.

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