Switching pawl type uniform reciprocating mechanism

Abstract

The invention relates to a switching pawl type uniform reciprocating mechanism. The mechanism comprises a linear guide rail fixed on a base plate, two guide wheels, an upper line wheel, a lower line wheel and a motor. A slit component is arranged on the linear guide rail; the two guide wheels are connected with the upper line wheel and the lower line wheel through a steel cable; the steel cable is coaxially wound with an upper swing rod and a lower swing rod; an upper pawl and a lower pawl are mounted on the upper swing rod and the lower swing rod through turnover shafts respectively; and an upper triggering stop block and a lower triggering stop block capable of blocking the upper pawl and the lower pawl into a pawl ditch are arranged at edges of the upper line wheel and the lower line wheel. The switching pawl type uniform reciprocating mechanism can be applied to an aerial camera shutter, in a curtain shutter slit and TDICCD working mode, working at the constant speed and quick returning to an initial position are required, and the better the shutter slit walking uniform moving property is, the higher the imaging quality is. The problem of accuracy of servo control of the motor over variable and parameter loads when short-period and high steady-speed transmission fields are required is solved.

Description

technical field [0001] The invention relates to the technical field of mechanical structures, in particular to a switching pawl type uniform speed reciprocating mechanism. Background technique [0002] In the aerial camera shutter, due to the limitation of speed-to-height ratio and exposure time, the curtain shutter requires uniform, linear, and reciprocating motion in a short period. For realizing above-mentioned function, existing mechanism is devices such as cam mechanism, crank-slider mechanism usually. Due to the variable load force of the mechanism, it is difficult for the existing mechanism to achieve a high stable state. These approximate uniform speed mechanisms are highly dependent on the servo drive, which makes the effective load of the shutter relatively reduced. Contents of the invention [0003] The present invention aims to solve the technical problem of lagging response of the rotary motor control system in the prior art, and provides a compact structure...

AI Technical Summary

Problems solved by technology

Due to the existence of variable load force of the mechanism, it is difficult for the existing mechanism to achieve a high stable state

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