Crank-slider-driven swing mirror mechanism

Abstract

The invention relates to a crank-slider-driven swing mirror mechanism, which comprises a swing mirror and mirror frame assembly, a swing mirror principal section adjusting mechanism, a rotary encoder, a motor and transmission mechanism, and a machine frame. The swing mirror and mirror frame assembly comprises a swing mirror, a nylon cushion block, a wedge-shaped pressing block, a threaded check ring, an inner mirror frame, an outer mirror frame, an outer mirror frame end cap, an outer mirror frame upper cover plate, a rotating half shaft, a first bearing end cap, a second bearing end cap and a machine frame antifriction bearing. The swing mirror principal section adjusting mechanism comprises an inner mirror frame adjusting block, a first adjusting screw rod and a second adjusting screw rod. The motor and transmission mechanism comprises a motor, a motor bracket, a synchronous belt, a small pulley, a large pulley, a horizontal sliding block, a horizontal guide rail, a hinge bar, an L-shaped connecting block, a connecting rod, a crankshaft bearing, a connecting rod cap, a crankshaft, a crankshaft bearing end cap and a crankshaft antifriction bearing. According to the technical scheme of the invention, the small-angle deflection movement of the swing mirror is converted into the long-distance rectilinear movement of a slider by the crank-slider-driven swing mirror mechanism. In this way, the high-precision deflection movement of the swing mirror can be realized based on the low-precision rectilinear movement of the slider, and the requirement on the control accuracy is lowered.

Description

technical field [0001] The invention relates to a swing mirror mechanism driven by a crank slider, which can be used for high-precision angle scanning and displacement tracking in the field of precision engineering. Background technique [0002] The pendulum mirror mechanism has a wide range of applications in the field of precision photoelectric tracking. It can realize high-precision optical tracking, scanning, alignment, measurement and compensation of dynamic errors, etc. [0003] In the prior technology (Sun Jianfeng and other patents, application number: 200410024986.2, application date October 2004 "High-precision dynamic and static measurement device for inter-satellite laser communication terminals"), the torque motor is used to directly couple the rotating shaft to realize the deflection of the optical element, thereby Angle adjustment is realized, but the mechanical system has high requirements on the rotation accuracy and dynamic performance of the torque motor,...

AI Technical Summary

Problems solved by technology

[0003] In the prior technology (Sun Jianfeng and other patents, application number: 200410024986.2, application date October 2004 "High-precision dynamic and static measurement device for inter-satellite laser communication terminals"), the torque motor is used to directly couple the rotating shaft to realize the deflection of the optical element, thereby Angle adjustment is realized, but the mechanical system has high requirements on the rotation accuracy and dynamic performance of the torque motor, and the mechanical error is relatively large

[0004] In the prior technology (Patent of Li Anhu et al., application number: 200510026553.5, application date June 2005 "Double optical wedge beam deflection mechanical device"), a linear motor direct jacking drive method is proposed, which belongs to the variable load system during motion, not only It is difficult to guarantee the control accuracy, and it is difficult to overcome the friction and influence generated by the return spring and the ejector rod during the movement

[0005] In the prior technology (Patent of Li Anhu et al., application number: 201010588924.X, application date December 2010 "Scanning Device for Swinging Optical Wedge"), the yaw movement of the optical wedge is realized through the kinematic coupling of three mechanical modules, but due to Both the first module and the third module adopt the sliding guide rail scheme, which is realized by sliding the slider on its guide rail. Therefore, the accumulation of errors generated by the two-stage sliding guide rails affects the accuracy of the yaw angle adjustment. At the same time, the second module There is also a movement gap in the use of joint bearings, which affects the accuracy of the system

[0006] In the prior technology (Patent of Li Anhu, etc., application number: 201210375722.6, application date: October 2013 "A swinging mirror mechanism using a cam drive"), the swinging motion of the swinging mirror is realized through cam driving, but for different scanning or tracking trajectory cams The outline needs to be designed separately, which is very cumbersome

For large-diameter swing mirrors, the friction, heat and wear generated by the cam swing mechanism in this invention are relatively large

At the same time, the device cannot adjust the position of the main section of the swing mirror, which will make the installation error unable to be reduced

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