Small-tooth-difference four-gear-pair meshing speed reducer

Abstract

The invention discloses a small-tooth-difference four-gear-pair meshing speed reducer. Two oppositely-distributed duplicate gears are assembled between two oppositely-mounted cross roller bearings, afixing gear meshed with the corresponding duplicate gear is arranged between each duplicate gear and the cross roller bearing at the corresponding side, output gears sleeve the peripheries of the twoduplicate gears, and input crank shafts are installed in the middles of the two duplicate gears. The number of the overall parts is low, the speed reducer is not provided with a deformation part, theredundant space for deformation and buffer of a flexible part does not need to be arranged in the speed reducer, and the speed reducer is simple and compact in structure and small in size. In addition, the two duplicate gears of the speed reducer are simultaneously meshed with the fixing gears and the output gears to form over positioning, the positioning precision is greatly improved, the influence of tooth gaps is eliminated to a certain degree, the repeated positioning precision is improved, and the small-tooth-difference four-gear-pair meshing speed reducer is applied to the technical field of transmission devices.

Description

technical field [0001] The invention relates to the technical field of transmission devices, in particular to a four-gear-pair meshing reducer with few tooth differences. Background technique [0002] Now in aerospace, industrial robots, processing equipment and other industries, the three types of reducers generally used are harmonic reducer, RV reducer and planetary gear reducer, but the volume and weight of harmonic reducer and RV reducer Too large, the precision is not high, the reduction ratio range is small, and the processing is difficult, and the cost of manufacturing is high; for the planetary reducer, there will be a problem of low precision, usually 1 to 3 arc minutes, and there are many problems in the input shaft. Large eccentricity, so during operation, the input shaft needs to bear the eccentric moment, resulting in a very low maximum speed. [0003] Furthermore, there is a common shortcoming in the above-mentioned three kinds of reducers: no self-locking pro...

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Problems solved by technology

[0002] Now in aerospace, industrial robots, processing equipment and other industries, the three types of reducers generally used are harmonic reducer, RV reducer and planetary gear reducer, but the volume and weight of harmonic reducer and RV reducer Too large, the precision is not high, the reduction ratio range is small, and the processing is difficult, and the cost of manufacturing is high; for the planetary reducer, there will be a problem of low precision, usually 1 to 3 arc minutes, and there are many problems in the input shaft. Large eccentricity, so during operation, the input shaft needs to bear the eccentric moment, resulting in a very low maximum speed

[0003] Furthermore, there is a common shortcoming in the above three reducers: no self-locking

If the load torque on the output end is greater than the drive torque, the output end will be taken away by the load. If it is installed on equipment such as robots or aerospace vehicles, it will cause serious safety accidents. The current solution is to input the reducer Adding a brake mechanism at the end, but this will increase the weight and volume of the entire component module, and the reliability cannot be guaranteed

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