Bearing seat and electric main shaft

Abstract

The invention relates to the technical field of machine tools, in particular to a bearing seat and an electric main shaft; a first oil inlet path communicates to a first bearing mounting part of the bearing seat; a second oil inlet path communicates to a second bearing mounting part of the bearing seat; and an oil return path respectively communicates to the first bearing mounting part and the second bearing mounting part so as to facilitate the backflow of lubricating oil. According to the bearing seat, independent lubricating flow channels are respectively designed for a first bearing and asecond bearing, so that the accuracy of lubricating parameters is guaranteed, the heat generated in the working process of the bearings is reduced, and the service life of the bearings is prolonged; and cooling flow channels comprise a first flow channel positioned inside the bearing seat and a second flow channel formed in the outer periphery side of the bearing seat, the first flow channel communicates with the second flow channel, existing structural members for forming cooling flow channels are eliminated, and the cooling flow channels are formed in the bearing seat, so that the space occupation is reduced, and the outer diameter size of the front end of the electric main shaft is reduced.

Description

technical field [0001] The present application generally relates to the technical field of machine tools, and in particular, relates to a bearing seat and an electric spindle. Background technique [0002] The electric spindle has a transmission structure mode in which the built-in motor and the machine tool spindle are "combined into one". The bearing is the core of the electric spindle and its rotating support components. Its lubrication and cooling play a vital role in the rotation accuracy, processing quality and service life of the spindle. Important role, oil-air lubrication is to mix lubricating oil with compressed air, send it to the oil nozzle through the oil delivery pipe, and spray it out from the oil nozzle to the bearing. The cooling channel structure of most electric spindle bearings is axially Or radial inflow, so that the wall thickness of the entire sleeve is increased, and the wall thickness of the bearing seat connected to the sleeve at the front end of th...

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Problems solved by technology

[0002] The electric spindle has a transmission structure mode in which the built-in motor and the machine tool spindle are "combined into one". The bearing is the core of the electric spindle and its rotating support components. Its lubrication and cooling play a vital role in the rotation accuracy, processing quality and service life of the spindle. Important role, oil-air lubrication is to mix lubricating oil with compressed air, send it to the oil nozzle through the oil delivery pipe, and spray it out from the oil nozzle to the bearing. The cooling channel structure of most electric spindle bearings is axially Or radial inflow, so that the wall thickness of the entire sleeve is increased, and the wall thickness of the bearing seat connected to the sleeve at the front end of the main shaft is thinned. The thicker sleeve not only occupies the outer space of the front end of the main shaft, but also reduces the front end of the main shaft Rigidity

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