Built-in slide valve throttling static-pressure nut pair

Abstract

The invention discloses a built-in slide valve throttling static-pressure nut pair, and relates to the field of precision mechanical automation equipment. The built-in slide valve throttling static-pressure nut pair comprises a lead screw and a nut which are matched with each other, wherein a first oil cavity and a second oil cavity are respectively formed in two sides of each inner thread surface of the nut; and by the first oil cavity and the second oil cavity, lubricating oil can form a static-pressure oil film between the lead screw and a thread side surface of the nut; a groove which communicates with the first oil cavity and the second oil cavity is formed in each inner thread on an excircle of the nut; a movable throttling component is mounted in each groove; oil supply grooves which communicate with the grooves are further formed in the excircle of the nut; a jacket is mounted on the excircle of the nut in a matched manner; and oil supply holes which communicate with the oil supply grooves are formed in the jacket. By the built-in slide valve throttling static-pressure nut pair, an oil supply pipeline can be simplified, and furthermore, the throttling performance can be improved.

Description

technical field [0001] The invention relates to the field of precision mechanical automation equipment, in particular to a built-in slide valve throttling static pressure nut pair. Background technique [0002] With the continuous development of CNC machine tools in the direction of high speed, heavy load, and precision integration, the contact wear, high-speed collision and heavy-load pitting of the rolling screw have become bottleneck problems; and the difficulty and cost of solving are also increasing. Although linear motors have advantages in high speed, their low load capacity, high technical difficulty and high cost greatly restrict their popularization and application. The hydrostatic screw can make up for the shortcomings of the rolling screw in terms of speed, load bearing, precision and wear, and become a more competitive transmission form for high-speed, heavy-duty, and precision applications. [0003] The hydrostatic nut pair utilizes the principle of hydrostati...

AI Technical Summary

Problems solved by technology

The disadvantage of this internal throttling static pressure lead screw nut is that throttling threads need to be manufactured on the lead screw and the nut, which increases the length of the nut, and due to the existence of pitch errors, the throttling characteristics are unstable and affect the transmission accuracy.

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