Telescopic positioning device

Abstract

The invention provides a telescopic positioning device. The device comprises a ball head supporting assembly, a linear bearing assembly, a spring assembly, a position adjusting assembly and multiple positioning assemblies. The ball head supporting assembly makes supporting contact with installation equipment, the linear bearing assembly is connected with the lower end of the ball head supporting assembly and can do reciprocating motion in the axial direction, the spring assembly is connected with the lower end of the linear bearing assembly and provides pressing pretightening force, the position adjusting assembly is connected with the lower end of the spring assembly and used for adjusting the longitudinal height of the ball head supporting assembly, and the multiple positioning assemblies are evenly connected with the circumference of the position adjusting assembly and used for longitudinal guiding and limiting of the position adjusting assembly. The telescopic positioning device further comprises an external shell. The linear bearing assembly, the spring assembly, the position adjusting assembly and the positioning assemblies are all connected with an inner cavity of the external shell. The longitudinal displacement adjusting range is large, compression pretighening force of the device can effectively meet installation requirements of large precision optical machine instruments, and the installation precision of large precision optical machine instruments is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of precision instrument installation and debugging, and more specifically relates to a high-precision telescopic positioning device. Background technique [0002] For the installation of large precision optomechanical instruments, high positioning accuracy is required. How to realize the high-precision positioning requirement puts forward a series of requirements for the positioning device. It needs to be able to move up and down freely while ensuring the positioning accuracy for easy installation. At the same time, a certain pre-tightening force is required to ensure the support stiffness, which puts forward demands on the stiffness of the positioning device. For different opto-mechanical instruments, higher design requirements and accuracy requirements are put forward for the positioning device, such as the range of its position moving up and down, the restraint reaction force after being compressed, etc...

AI Technical Summary

Problems solved by technology

[0003] However, due to many defects in the design structure of the current positioning tool, there is a technical problem that the range and compression pretightening force for adjusting the position of precision optical-mechanical instruments cannot effectively meet the design requirements.

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