Electronic-control anti-backlash gear pair

Abstract

The invention discloses an electronic-control anti-backlash gear pair. The electronic-control anti-backlash gear pair comprises a first gear, a second gear and a third gear. The second gear and the third gear are coaxial and parallel and are meshed with the first gear, and the freedom degree of relative rotation in the circumferential direction exists between the second gear and the third gear. The electronic-control anti-backlash gear pair further comprises an electronic-control anti-backlash system composed of an electronic driving block and a control unit, wherein the electronic driving block is used for driving the second gear and the third gear to relatively rotate to eliminate meshed backlash between the second gear and the first gear and between the third gear and the first gear during electronic deformation. According to the electronic-control anti-backlash gear pair, when the backlash needs to be adjusted, electronic deformation materials are electrified to be deformed, a double gear formed by the second gear and the third gear relatively rotates to eliminate the backlash between the second gear and the first gear meshed with the second gear and between the third gear and the first gear meshed with the third gear, the gear backlash and the return difference can be accordingly eliminated or reduced in real time, cost is low, the structure is simple, accessory equipment such as a motor is not needed, the occupied space is small, driving energy is reduced, the transmission error during direction changing is reduced, and operation and control are simpler and more convenient; as the original mode that the backlash is eliminated through mechanical force of a power source is not adopted, controllability and accuracy are high, and the electronic-control anti-backlash gear pair is suitable for occasions with the requirements for the high accuracy.

Description

technical field [0001] The invention relates to a gear meshing pair, in particular to a variable-tooth-thickness gear meshing pair used for backlash elimination by electronically controlled mechanical external force. Background technique [0002] Gear transmission is used to transmit motion and force between two shafts. Compared with other mechanical transmission methods, gear transmission has stable movement, compact structure, low noise and high transmission efficiency. It is widely used in various machines and instruments. Applications. [0003] With the development of science and technology and production technology, as well as people's high-quality requirements for various products, especially in the development of precision transmission, higher and higher requirements are placed on the adjustment and control of transmission accuracy and tooth backlash. [0004] Gear transmission mainly affects the accuracy of the backlash, and there are many ways to adjust or eliminat...

AI Technical Summary

Problems solved by technology

[0004] The gear transmission mainly affects the accuracy of the backlash, and there are many ways to adjust or eliminate the backlash, but all of them have complex structures and assemblies, which are only applicable to low-power systems, and often can only eliminate a certain constant backlash. Disadvantages: Among them, the double-drive chain anti-backlash method driven by dual motors and the auxiliary torque motor loading method introduce motors for gap adjustment, and the gap adjustment effect is relatively ideal, but there are shortcomings of large space occupation and waste of driving energy, and the cost is relatively high. High, the requirements for the control system are also relatively high, the requirements for the synchronization of the control are very high, and the drive energy is increased

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