Air cooling electric spindle device for precision numerical control lathe

Abstract

The invention relates to an air cooling electric spindle device for a precision numerical control lathe and belongs to the field of a part device of a machine tool. The existing lathe spindle has complex structure, poor accuracy and poor heat dissipation. The air cooling electric spindle device for the precision numerical control lathe comprises a spindle box body, a front bearing support, a rear bearing support, a hollow spindle, a spindle driving mechanism, an angle coder device, a brake device and a cooling system; the hollow spindle is supported and arranged on the front and rear bearing supports at both ends of a spindle hole of the spindle box body by bearings; the spindle is driven by the spindle driving mechanism to rotate; the angle coder device is arranged at the rear end of the spindle by a connecting sleeve; the brake device comprises a brake disk and a hydraulic brake; the hydraulic brake is arranged at the rear end of the spindle box body by a bracket; the brake disk is arranged at the rear end of the connecting sleeve; the cooling device comprises a fan and the bracket; the fan is arranged on the spindle box body by the bracket; and the fan is over against a vent on the spindle box body. The spindle, an angle coder and the cooling of the fan are braked by the brake device; the processing and positioning accuracy of the electric spindle is improved; and the heat dissipation is also good.

Description

technical field [0001] The invention belongs to a machine tool component device, in particular to an electric spindle device for a precision numerical control lathe. Background technique [0002] At present, the transmission chain of the ordinary lathe spindle structure is too long, the external dimension is large, and the transmission torque is small, which affects the transmission accuracy and positioning accuracy of the lathe spindle, and when it is necessary to stop processing, the spindle cannot stop immediately, and the control is poor; High-speed rotation, so water-cooling is generally used for cooling. There is a risk of liquid leakage in water-cooling, which affects environmental sanitation. The existing technology also uses air-cooled electric spindles, but the fans are installed at the rear end of the spindle, which affects the increase in spindle speed and heat dissipation. The effect is not ideal. Contents of the invention [0003] The purpose of the pres...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the existing lathe spindle structure, such as too long drive chain, large external dimensions, small transmission torque, poor working accuracy, poor spindle rotation positioning, and poor heat dissipation of the spindle. The present invention provides a high-precision, Accurate positioning, good heat dissipation, precision CNC lathe air-cooled electric spindle device

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