Square-section spring mechanism with adjustable rigidity

Abstract

A square-section spring mechanism with adjustable rigidity comprises a pipe body, a spring and a screw, an external thread is arranged on the outer wall of the pipe body, an internal thread is arranged on the inner wall of the pipe body, the screw is screwed into the internal thread to form a first screw pair, and the spring is screwed into the external thread to form a second screw pair. The spring is a cylindrical equal-pitch spiral spring with the rectangular section, the first screw pair and the second screw pair are rectangular screw pairs, the internal thread and the external thread are equal in pitch, the lift angle of the internal thread and the lift angle of the external thread of the pipe body are smaller than the minimum equivalent frictional angle in the first screw pair and the second screw pair, and the rigidity of the spring is continuously adjustable within the design range. The square-section spring mechanism is simple in structure, capable of bearing large loads and high in stability, the rigidity of the spring mechanism can be adjusted under the loading condition, the rigidity adjusting process is simple, the debugging time is greatly saved, and the debugging efficiency of a prototype is improved.

Description

technical field [0001] The invention relates to a spring, in particular to a square-section spring mechanism with adjustable stiffness. Background technique [0002] Springs with adjustable stiffness are in great demand in engineering practices such as prototype debugging and modal analysis to determine the optimal stiffness of a spring in the system to meet design requirements. In order to achieve the purpose of adjusting the spring stiffness, there are three main methods widely used at present: one is to produce springs with various stiffnesses until a suitable stiffness is found. This method is costly and takes a long time to debug the prototype. The second is to use the electric control or air control system to adjust the action part of the spring. This kind of system has a complex structure, large volume, is not easy to install and use, and has high requirements on the surrounding environment; the third is to realize it through electromagnetic springs. , this kind of s...

AI Technical Summary

Problems solved by technology

In order to achieve the purpose of adjusting the spring stiffness, there are three main methods widely used at present: one is to produce springs with various stiffnesses until a suitable stiffness is found. This method is costly and takes a long time to debug the prototype. The second is to use the electric control or air control system to adjust the action part of the spring. This kind of system has a complex structure, large volume, is not easy to install and use, and has high requirements on the surrounding environment; the third is to realize it through electromagnetic springs. , this kind of spring has a small load capacity and cannot meet the engineering needs

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