Motor dual-bearing structure with dual-lubricating system

Abstract

The present invention provides a motor dual-bearing structure with a dual-lubricating system. The motor dual-bearing structure is characterized in that an inner bearing, a grease regulator and an outer bearing sleeve on a rotating shaft, the grease regulator is located between the inner bearing and the outer bearing, an outer bearing chamber sleeves the outer bearing, and an inner bearing chamber sleeves the inner bearing; the end parts of the inner bearing and the inner bearing chamber are equipped with the inner bearing covers, and an inner oil seal is arranged between the inner bearing covers and the rotating shaft; the end parts of the outer bearing and the outer bearing chamber are equipped with the outer bearing covers, and an outer oil seal is arranged between the outer bearing covers and the rotating shaft; the inner bearing chamber, the inner bearing covers, the inner oil seal and the inner bearing form an inner grease storage cavity, and an inner grease injection channel is arranged inside the outer bearing chamber; the outer bearing chamber, the outer bearing covers, the outer oil seal and the outer bearing form an outer grease storage cavity, and an outer grease injection channel is arranged in the outer bearing chamber; the inner bearing chamber, the inner bearing and the grease regulator form an inner grease discharging cavity, and the outer bearing chamber, the outer bearing and the grease regulator form an outer grease discharging cavity; the grease discharging holes are arranged at the lateral bottom of the outer bearing chamber and are communicated with the inner grease discharging cavity and the outer grease discharging cavity separately.

Description

technical field [0001] The invention belongs to the field of motors, and more specifically relates to a double bearing structure for a motor with a double lubrication system. Background technique [0002] One end adopts "deep groove ball bearing + cylindrical roller bearing", and the other end adopts the structure of cylindrical roller bearing, which is a common bearing arrangement in the motor field. Among them, cylindrical roller bearings are used to bear radial loads, while deep groove ball bearings are used to bear axial loads. For this double bearing combination of "deep groove ball bearing + cylindrical roller bearing", its installation and fixing structure and lubrication method have an important impact on the performance and life of the bearing. [0003] The traditional method is to directly contact two bearings with each other, treat them as a single bearing and adopt a single bearing assembly and fixing structure and lubrication method, such as injecting oil from ...

AI Technical Summary

Problems solved by technology

However, there are still some defects: first, the two bearings share a grease storage chamber, which makes it impossible to independently and accurately control the amount of grease; second, the waste oil passage of the inner bearing is tortuous and complicated, which is not conducive to the discharge of waste oil

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