Gear drive that eliminates backlash

Abstract

The invention discloses a gear transmission device capable of eliminating backlash, which includes a driven gear set meshing with a driving gear and a torsion spring plate of a circular ring structure, and the driven gear set includes a coaxial driven gear And the anti-air return gear, the outer ring of the torsion spring plate is extended with the same number of fixed parts as the spokes of the driven gear, the fixed part is fixed on the spokes of the driven gear, and the outer ring of the fixed part or the torsion spring plate is extended. The elastic claws that the spokes of the anti-aircraft return gear contact, the elastic claws generate torsional torque to the anti-aircraft return gear, so that the anti-aircraft return gear and the driven gear are staggered by a certain angle to mesh with the driving gear. The invention provides torsion torque for the anti-air return gear through the elastic claw, so that the anti-air return gear and the driven gear are staggered by a certain angle and then meshed with the driving gear. Resistance torque to eliminate backlash and improve rotary positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of gear transmission, in particular to a gear transmission device capable of eliminating backlash. Background technique [0002] In the mechanical structure of precision gear transmission, when the control gear rotates clockwise and counterclockwise, due to the center distance of the fixed gear shaft due to machining errors, the two meshing gears produce a backlash, thus causing the two gears Rotary positioning error of transmission angle occurs when clockwise meshing transmission and counterclockwise meshing transmission. [0003] Especially for the transmission of the absolute rotary encoder, the transmission error requirements for the clockwise rotation and counterclockwise rotation of the gear shaft are relatively high, and the corresponding accuracy of the code value is extremely high, so the gap elimination method must be used to improve the two gears in the clockwise direction Rotary positioning accu...

AI Technical Summary

Problems solved by technology

[0004] The general method in the past is to use the mechanical structure of the extension spring. Because the spring is hidden inside the gear, it is inconvenient to adjust and replace the spring. Moreover, the reliability of the hanging spring and compression spring is poor, and it is easy to unhook and bias off.

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