Self-adaptive limited angle pretightening transmission device suitable for limited space

Abstract

The invention discloses a limited angle pretightening transmission device suitable for a limited space. The limited angle pretightening transmission device suitable for the limited space mainly comprises a driving wheel, a driven wheel, a transmission medium, a pretightening pressing block, a self-adaptive pretightening mechanism, a force displacement sensor and the like, wherein an input shaft and an output shaft are parallel and are connected through the transmission medium; the pretightening pressing block is installed on the input shaft and can fix the transmission medium; and the force displacement sensor is embedded into the input shaft and can perform real-time correction and compensation on a pretightening state of the transmission medium by virtue of the leverage of the self-adaptive pretightening mechanism. Compared with a traditional transmission and pretightening scheme, the self-adaptive pretightening transmission device has the characteristics of high precision transmission, compact structure, small occupied space, dynamic compensation, light weight, high reliability and the like.

Description

technical field [0001] The invention belongs to the technical field of transmission, and relates to an adaptive limited-angle pre-tightening transmission device suitable for limited space. Background technique [0002] With the continuous exploration and development in the field of high-precision transmission, wire rope or steel belt transmission is more and more widely used in the field of engineering practice. Compared with traditional gear transmission or parallel mechanism transmission scheme, it has small size, light weight and high transmission accuracy. Higher advantages, but its transmission effect is highly dependent on the uniformity of friction between the steel wire rope or steel belt and the pulley, so obtaining and maintaining the tension that can make it suitable for the ideal tension state becomes the key to its performance. At the same time, even if the initial state is well pre-tightened, the steel wire rope or steel belt is prone to relaxation due to being...

AI Technical Summary

Problems solved by technology

For the gear transmission scheme, its heavy weight, large volume, and the objective existence of gear backlash all limit the development requirements of high performance, miniaturization and light weight of photoelectric equipment; for the four-bar linkage transmission mechanism, its existence The large size of the mirror, as well as the poor transmission rigidity and instability caused by assembly errors, also restrict the image stabilization effect of the mirror

Based on the above problems, scientific and technological workers have explored the transmission method using steel belt or steel wire rope as the medium, but the tension of the steel belt or steel wire rope in practical applications is closely related to its comprehensive performance. When the tension is too small, the transmission will easily occur Slipping, poor followability of the output wheel to the input wheel, not only is it difficult to accurately achieve 2:1 stabilization of the mirror, but also prone to large deviations when the platform is stable; when the tension is too large, the friction will be too large, not only If the transmission efficiency is reduced, the unevenness of the transmission will also increase significantly, which will eventually affect the comprehensive image stabilization effect of precision photoelectric equipment; , Different material expansion coefficients between the output shafts will also bring changes in tension, thus affecting the effectiveness of the transmission

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