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Built-in slide valve throttling static pressure nut pair

A nut pair, built-in technology, applied in the direction of transmission, transmission parts, gear lubrication/cooling, etc., can solve the problems of increasing the length of the nut, affecting the transmission accuracy, unstable throttling characteristics, etc., to reduce the length, avoid Oil supply pipeline, good throttling performance

Inactive Publication Date: 2018-04-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Built-in slide valve throttling static pressure nut pair
  • Built-in slide valve throttling static pressure nut pair
  • Built-in slide valve throttling static pressure nut pair

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Embodiment Construction

[0025] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0026] The invention provides a built-in slide valve throttling static pressure nut, such as Figure 1-3 As shown, including matching lead screw 1 and nut 2, wherein:

[0027] The two sides of each internal thread tooth surface of the nut 2 have a first oil chamber 3 and a second oil chamber 4 respectively. A hydrostatic oil film is formed between the sides;

[0028] On the outer circle of the nut 2, a groove 5 communicating with the first oil chamber 3 and the second oil chamber 4 is provided at each internal thread tooth, and a movable throttling member 7 is installed in the groove 5;

[0029] An oil supply groove 6 communicating with the groove 5 is also arranged on the outer circle of the nut 2;

[0030] The outer circle of the nut 2 is fitted wit...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H25/20F16H25/24F16H57/04
CPCF16H25/20F16H25/24F16H57/0497
Inventor 路长厚
Owner SHANDONG UNIV
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