Ball high-speed motorized spindle

Abstract

A ball high-speed motorized spindle comprises a unit component which comprises a body, a stator fixed in the unit and an upper bearing block and a lower bearing block which are fixedly connected onto the unit. A shaft core component comprises a shaft core and a rotor which is mounted on the outside of the shaft core and matched with the stator. The upper end of the shaft core is pivoted to the upper bearing block through an upper bearing, and the lower end is pivoted to the lower bearing block through a lower bearing. An upper lubrication oil gas inlet, a lower lubrication oil gas inlet and a lubrication oil gas outlet are formed in the body component. Gaps between the upper lubrication oil gas inlet and an upper bearing inner ring and outer ring and the lubrication oil gas outlet are communicated successively. Gaps between the lower lubrication oil gas inlet and a lower bearing inner ring and outer ring and the lubrication oil gas outlet are communicated successively. According to the ball high-speed motorized spindle, channels for delivering oil gas lubrication media to the upper bearing and the lower bearing are arranged in the ball high-speed motorized spindle to deliver oil gas lubrication media to the upper bearing and the lower bearing continuously, so that the lubrication effect is improved.

Description

[0001] technical field [0002] The invention relates to a ball high-speed electric spindle applied 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 grea...

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 grease to ensure that the electric spindle The shaft core rotates at a 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

At the same time, at present, the rotary joint part of the electric spindle adopts a contact-type cooperation with the shaft core, and there is sliding friction between the rotary joint and the high-speed rotating shaft core, which limits the rotation rate of the shaft core to a certain extent; in addition, the existing The shaft core and the rotary joint adopt the contact sealing method, the sealing effect is poor, and some coolant will still enter the electric spindle through the gap. At the same time, this contact sealing usually relies on the sealing rubber ring. When rotating, the wear of the sealing rubber ring is serious, resulting in a shorter service life of the sealing rubber ring

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