Multi-point partial pre-fastening method with adjustable load sharing mechanism

Abstract

The invention relates to a multipoint local pretightening method for adjustable load sharing mechanisms, which belongs to the field of a sensing test method and a sensing test device. The method realizes multipoint local pretightening by adjustment of a pretightening screw to drive a pretightening slider, and realizes adjustment of structural parameters through a mounting length adjustable measuring rod. The multipoint local pretightening method adjusts the length of the measuring rod according to the actual demand of measurement and assembly, performs multipoint local pretightening force adjustment, and makes the measuring rod exerted by the pretightening force. The device adopted comprises six groups of adjustable load sharing mechanisms with the same structures, wherein each group of adjustable load sharing mechanisms consist of an upper platform, a lower platform, the pretightening screw, the pretightening slider, an upper connecting rod, a lower connecting rod, an upper round nut, a lower round nut, an upper connecting flange, a lower connecting flange, a group of piezoelectric quartz sensors and a positioning ring. The multipoint local pretightening method realizes multipoint local pretightening and adjustment of the structural parameters, and has the characteristics of good pretightening effect, strong large-load sharing capacity, convenient assembling operation, high precision, good stability and simple structure.

Description

technical field [0001] The invention relates to a multi-point local preloading method of an adjustable load-distributing mechanism, which belongs to the field of sensor testing methods and equipment design and manufacture. Background technique [0002] With the rapid development of science and technology, the six-dimensional force distribution mechanism has been widely used in various fields such as aerospace, national defense and industrial production. Because the six-dimensional load-distributing mechanism can perceive all the information of external force and moment, countries in the world today attach great importance to its development, and regard it as one of the key technologies related to national security, economic development and scientific and technological progress, and list it in the national technological development in the strategic plan. In the research of the six-dimensional load-sharing mechanism, preload and structural parameter adjustment are important l...

AI Technical Summary

Problems solved by technology

In the research of the six-dimensional load-sharing mechanism, preload and structural parameter adjustment are important links in the design and manufacture of the load-sharing mechanism, especially for the six-dimensional load-sharing mechanism based on a parallel structure, its preload and structural parameter adjustment are extremely difficult , most of the current six-dimensional load-sharing mechanisms still adopt the overall preload method, but structural parameters cannot be adjusted according to actual needs

At present, Chinese patent 101038222A discloses a six-dimensional force sensor with an up and down preloaded parallel structure, Chinese patent 1263259A discloses an integral preloaded platform six-dimensional force sensor, and Chinese patent 101038221A discloses a left and right preloaded parallel structure Six-dimensional force sensor, although the overall preload can effectively eliminate the hinge gap, reduce the error, and improve the overall stiffness, but it is difficult to adjust the preload of each sensitive unit

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