Roller reducer

Abstract

The invention discloses a roller speed reducer. The roller speed reducer comprises an eccentric sleeve, a planet wheel, an output wheel and a fixed base, wherein the planet wheel coats the eccentric sleeve; the output wheel and the fixed base respectively coat the two ends of the planet wheel; the planet wheel and the output wheel are in transmission connection; first rollers are arranged between the planet wheel and the fixed base; U-shaped grooves are respectively formed in the outer side of the planet wheel and the inner side of the fixed base; the U-shaped grooves of the fixed base are equal to the first rollers in number; and the U-shaped grooves of the planet wheel are fewer than the first rollers. The roller speed reducer realizes the large-speed-ratio speed change transmission of the planet wheel and the eccentric shaft through combining with a principle of small-tooth-difference gear transmission, so that the speed reducer has the advantages of small volume, large speed ratio, high speed change precision and high rigidity. The transmission ratio of the roller speed reducer is adjusted through changing the number of the first rollers; and meanwhile, the transfer of torsion magnitude of the roller speed reducer is adjusted through changing the diameter size of the first rollers. The first rollers are arranged in the U-shaped grooves of the fixed base and the planet wheel, so that the friction and the collision of radial acting force between the planet wheel and the fixed base can be relieved.

Description

technical field [0001] The invention relates to a speed reducer, in particular to a roller speed reducer. Background technique [0002] It is well known that with the development of transmission technology, the field of mechanical transmission puts forward higher and higher requirements on the precision requirements, carrying capacity and service life of the reducer. Existing transmission and speed change mechanisms generally pass through gear transmission, worm gear transmission, sprocket chain transmission and the like. Gear transmission can adopt external tooth meshing or internal tooth meshing. When the external teeth are meshing, the number of meshing teeth is small. Generally, the transmission torque can only be increased by increasing the modulus of the gears. The large speed ratio output requires a large volume of the mechanism. The internal meshing adopts the principle of less tooth difference, and multiple teeth can be meshed at the same time, but the interferenc...

AI Technical Summary

Problems solved by technology

Internal gearing adopts the principle of small tooth difference, and multiple teeth can be meshed at the same time, but the interference of internal and external gears in the transmission restricts the number of meshing teeth, and it is also difficult to output large torque

The sprocket transmission uses the meshing of the sprocket and the chain to transmit power. Although the multi-row chain and multi-row tooth method can transmit large torque, its transmission ratio is small, and it cannot realize large speed ratio transmission.

Moreover, the above-mentioned traditional reducer has a large body, low precision, insufficient rigidity, and difficult production and processing.

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