High-power and high-speed electric spindle

Abstract

The invention discloses a high-power and high-speed electric spindle. The high-power and high-speed electric spindle comprises a body assembly, a spindle core, a pull claw and a pull rod, wherein the body assembly comprises a body, an upper bearing seat component and a lower bearing seat component; the upper end of the spindle core is pivoted with the upper bearing seat component through an upper bearing; the lower end of the spindle core is pivoted with the lower bearing seat component through a lower bearing; the pull claw is mounted on the lower end of the spindle core and connected with a cutter; a lower bearing oil-gas inlet channel and a lower bearing oil-gas outlet channel are formed in the body; an inner side end of the lower bearing oil-gas inlet channel is communicated with a gap between an inner ring and an outer ring of the lower bearing; an inner side end of the lower bearing oil-gas outlet channel is communicated with the gap between the inner ring and the outer ring of the lower bearing; an upper bearing oil-gas inlet channel and an upper bearing oil-gas outlet channel are also formed in the boy; an inner side end of the upper bearing oil-gas inlet channel is communicated with the gap between the inner ring and the outer ring of the upper bearing; and an inner side end of the upper bearing oil-gas outlet channel is communicated with the gap between the inner ring and the outer ring of the upper bearing. According to the high-power and high-speed electric spindle, inner rings and outer rings of the upper bearing, the lower bearing and the middle bearing of the electric spindle are lubricated by using an oil-gas lubrication medium, so that the lubrication effect is improved and the rotation efficiency of the electric spindle center is improved.

Description

[0001] technical field [0002] The invention relates to a high-power high-speed electric spindle used in the field of mechanical processing [0003] Background technique [0004] The electric spindle is a commonly used equipment for mechanical processing. It usually includes the body and the shaft core assembly. The shaft core assembly is installed inside the body. The shaft core assembly rotates at high speed, and an upper bearing seat and a lower bearing seat are fixed on the body, and the two ends of the shaft core assembly are pivotally connected to the upper bearing seat and the lower bearing seat through the upper bearing and the lower bearing respectively. [0005] At present, the high-speed rotation of the electric spindle mainly depends on the upper bearing and the lower bearing matched by the upper bearing seat and the lower bearing seat at both ends of the shaft core. The inner ring and the outer ring of the upper bearing and the lower bearing are filled with lu...

AI Technical Summary

Problems solved by technology

[0005] At present, the high-speed rotation of the electric spindle mainly depends on the upper bearing and the lower bearing matched by the upper bearing seat and the lower bearing seat at both ends of the shaft core. The inner ring and the outer ring of the upper bearing and the lower bearing are filled with lubricating oil to ensure that the electric spindle The shaft core rotates at high speed. This method of lubrication has high requirements on the performance of the grease, and the lubricating effect of the grease is not ideal after a long time of use, which affects the rotation speed of the electric spindle. In order to improve the rotation efficiency of the electric spindle, The existing improvements are all achieved by improving the performance of the grease, therefore, the improvement effect is relatively limited

In addition, the current cooling technology for high-speed electric spindles is usually to cool the electric spindle body to reduce the temperature of the body and the surface of the shaft core. The cooling effect of this cooling method is relatively limited. For some high-power spindles , due to the high rotation rate of the shaft core, the way of cooling only on the surface of the machine body can no longer meet the requirements for the use of high-power electric spindles

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