Electric spindle supported by multivariant bearing

Abstract

The invention discloses an electric spindle supported by a multivariant bearing. The electric spindle comprises a shell, a rotary axle, a stator and a rotator, wherein the rotary axle is arranged in the shell, and the stator and the rotator are internally provided with a motor. The front end of the rotary axle is arranged at the external part of the shell and is adjacent to the front cover of the shell. An oil inlet for supplying pressure oil to the rotary axle is arranged in the front cover of the shell. A rear-supporting bearing is connected at the tail end of the rotary axle in the shell. The electric spindle supported by the multivariant bearing has the beneficial effects that two angular contact ball bearings of the rear bearing are used as the rear end radical supporting of the rotary axle and the axial supporting of the rotary axle to play the functions of being convenience in maintaining and repairing and being capable of bearing dual-directional axial load of the rolling bearing. By supplying pressure oil through the oil inlet, an oil membrane dynamic and static pressure bearing is formed between the front cover and the rotary axle. As the dynamic and static pressure oil membrane bearing has a larger axial bearing capacity and a longer server life than the rolling bearing, the bearing capacity of the output end of the electric spindle can be improved, and a longer service life of the electric spindle can be maintained under a larger external load.

Description

technical field [0001] The invention relates to an electric spindle in the field of electromechanical engineering, in particular to an electric spindle supported by multiple bearings. Background technique [0002] The high-speed electric spindle is a mechatronic power component that incorporates a drive motor to achieve high speed, high precision and high efficiency. At present, the support system of the electric spindle generally adopts the same type of bearings, so the structure of the electric spindle mainly includes: electric spindles supported by rolling bearings, electric spindles supported by fluid lubricated bearings, electric spindles supported by magnetic suspension bearings and electric spindles supported by other bearings. These electric spindles supported by the same type of bearings have a simple structure and can meet the requirements of simple high speed or simple heavy load. However, for the occasions requiring comprehensive or some special performance, it i...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to overcome the application limitations of the existing single-type bearing-supported electric spindle, and provide a new structure of multiple bearing-supported electric spindles. The technical problem to be solved is to make it meet the requirements of specific electric spindles And the characteristics of various types of bearings, different types of bearings for different parts of the bearing, which is more suitable for practical use, and has industrial utilization value

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