High-reliability and high-self-locking-capacity calibration mechanism

Abstract

The invention provides a high-reliability and high-self-locking-capacity calibration mechanism. The high-reliability and high-self-locking-capacity calibration mechanism comprises a driving assembly,an execution assembly and a feedback assembly which are arranged on a base, wherein the driving assembly drives the execution assembly to be opened and closed, the feedback assembly feeds back the rotation angle of the execution assembly, the driving assembly and the feedback assembly are arranged on the two opposite sides of the execution assembly, and the driving assembly is further matched witha brake; the execution assembly comprises a calibration plate, the calibration plate is fixed on a long shaft, and the long shaft is rotationally arranged on the base; and the driving assembly comprises a motor, a first coupler, a crank, a connecting rod, a shifting pin, a stop pin, a torsion spring and a torsion spring fixing seat, and an output shaft of the motor is connected with a crank shaftthrough the first coupler. According to the high-reliability and high-self-locking-capacity calibration mechanism, the dead point principle of a crank and rocker mechanism is ingeniously utilized, and the torsion spring is introduced, so that the following effects can be achieved: the reliability is high, the assembly process is simple, the production efficiency is high, the rigidity is high, theself-locking performance is good, the mechanism is suitable for batch production, the performance is excellent, and the increasing radiation calibration requirements of a space camera can be met.

Description

technical field [0001] The invention belongs to the field of aerospace radiation calibration, in particular to a calibration mechanism with high reliability and high self-locking capability. Background technique [0002] The traditional calibration mechanism often adopts the principle of worm gear drive, which often faces the following four problems. a) The reliability of the traditional calibration mechanism is very poor. When the motor fails, due to the self-locking property of the worm gear, the calibration plate cannot automatically return to the normal open state, and can only remain in the state when the motor fails, which has a great risk It will block the light and affect the imaging of the space camera; b) The assembly process of the traditional calibration mechanism is complicated. When the worm gear assembly relationship is too tight, it can ensure the self-locking of the vibration test, but it is easy to get stuck during the thermal cycle test; when the worm gear...

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Problems solved by technology

c) The production efficiency of the traditional calibration mechanism is low, because the assembly process of the worm gear is complicated, which makes it unfavorable for mass production

d) The mechanical response of the tradit

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