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Gear transmission device capable of eliminating backlash

A technology of gear transmission and clearance, which is applied to hoisting devices, portable lifting devices, belts/chains/gears, etc., can solve the problems of inconvenient adjustment and replacement of springs, poor reliability of hanging springs, compression springs, and bias shedding, etc. Simple and reliable molding, stable and reliable adjustment, and easy processing

Active Publication Date: 2020-04-21
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Gear transmission device capable of eliminating backlash
  • Gear transmission device capable of eliminating backlash
  • Gear transmission device capable of eliminating backlash

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0022] Glossary

[0023] Center distance: usually refers to the center distance between two gear shafts.

[0024] Rotary positioning accuracy: Under the same conditions, the position accuracy of the object returning to its original position after moving.

[0025] The invention provides a gear transmission device capable of eliminating backlash. The driven gear meshed with the driving gear is made into two pieces, and the two pieces of driven gear are staggered by a certain angle through a torsion spring plate, and then respectively connected with the driving gear. Mesh assembly forms...

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Abstract

The invention discloses a gear transmission device capable of eliminating backlash. The device comprises a driven anti-backlash gear set meshed with a driving gear and a torsion spring plate of an annular structure. The driven anti-backlash gear set comprises a driven gear and an anti-backlash gear which are coaxial; fixed parts of which the number is the same as that of spokes of the driven gearextend from an outer ring of the torsion spring plate; the fixed parts are fixed to the spokes of the driven gear, an elastic claw making contact with the spokes of the anti-backlash gear extends froman outer ring of a fixed part or an outer ring of the torsion spring plate, the elastic claw generates torsional moment on the anti-backlash gear, and the anti-backlash gear and the driven gear are meshed with the driving gear after being staggered by a certain angle. Torsional torque is provided for the anti-backlash gear through the elastic claw, the anti-backlash gear and the driven gear are meshed with the driving gear after being staggered by a certain angle, and when the anti-backlash gear and the driving gear are in meshed transmission, the torsional torque generated by the elastic claw is larger than transmission resistance torque, so that backlash is eliminated, and the rotation positioning precision is improved.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H55/18
CPCF16H55/18
Inventor 高志良
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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