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Screw mechanism with adjustable pre-tightening force

A set screw and screw technology, which is applied in the connection of screws, nuts, rods, etc., can solve the problems of spherical locking screws, such as easy damage, short service life, and insufficient stability of the mechanism, and achieve stable and reliable locking and long service life. Effect

Inactive Publication Date: 2015-05-27
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Among the universal locking screws of various adjustment mechanisms, the common locking screws whose locking surface is flat or conical and the locking screws whose locking end surface is spherical, among them, the end surfaces of ordinary locking screws are relatively hard and inelastic. The guide cylindrical surface of the adjustment mechanism is easy to be damaged, and it is impossible to achieve multiple and micro adjustments; in addition, the spherical surface of the spherical locking screw is provided as a point contact with the cylindrical surface of the adjustment mechanism, and the pressing force is poor, and the overall mechanism is not stable enough. At the same time, the hemming of the spherical surface Thinner, resulting in the spherical locking screw itself is easily damaged and has a shorter service life

Method used

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  • Screw mechanism with adjustable pre-tightening force
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  • Screw mechanism with adjustable pre-tightening force

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention should not be limited accordingly.

[0015] see figure 1 , figure 2 , figure 1 It is a cross-sectional view of the screw mechanism with adjustable preload of the present invention. It can be seen from the figure that the screw mechanism with adjustable preload of the present invention consists of a screw 1 with an internal stepped threaded hole, a stepped cylindrical boss 2, and a compression spring. 3. Set screw 4, the internal stepped threaded hole screw 1 has external thread and internal stepped threaded hole, and the internal stepped threaded hole is divided into two sections along the axial direction: the long internal threaded hole is a fine-pitched internal screw hole M1, the short-section internal threaded hole is an ordinary internal screw hole M2, the tail of the smaller outer cylinder of the ...

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Abstract

The invention discloses a screw mechanism with adjustable pre-tightening force used for lifting adjustment. The screw mechanism is characterized in that the pre-tightening force is provided for a screw through an inner compression spring, and a lifting adjustment rod cylinder is tightly pressed by a cylindrical flat head at the head part of the screw. The screw mechanism is used for lifting adjustment and has the characteristics of stability, reliability, no damage to a cylindrical surface of the lifting rod and long service life.

Description

technical field [0001] The invention relates to screws, in particular to a special screw mechanism with adjustable pre-compression force for lifting adjustment. Background technique [0002] Among the universal locking screws of various adjustment mechanisms, the common locking screws whose locking surface is flat or conical and the locking screws whose locking end surface is spherical, among them, the end surfaces of ordinary locking screws are relatively hard and inelastic. The guide cylindrical surface of the adjustment mechanism is easy to be damaged, and it is impossible to achieve multiple and micro adjustments; in addition, the spherical surface of the spherical locking screw is provided as a point contact with the cylindrical surface of the adjustment mechanism, and the pressing force is poor, and the overall mechanism is not stable enough. At the same time, the hemming of the spherical surface Thinner, the spherical locking screw itself is easily damaged and has a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/00F16B37/00F16B7/10
CPCF16B35/00F16B7/10F16B37/00
Inventor 朱健强汤更秀王聪瑜刘志刚庞向阳
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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