High-power stepless transmission

Abstract

The invention relates to a tooth chain type stepless transmission for an automobile. A tooth chain is arranged around a plurality of planetary gears which can unidirectionally rotate; all the planetary gears can move in a corresponding radial chute on a drive wheel; and stepless transmission is realized by changing the revolution diameter of the planetary gears. An unlocking key is arranged in a one-way clutch of each planetary gear; and when the tooth chain and the planetary gears are meshed and separated, the unlocking key can be driven so that the clutch is maintained in a one-way locking state or unlocking state. The invention breaks through the traditional theory that the stepless transmission is only friction power transmission, solves the problem of carrying out stepless transmission by utilizing a gear, can effectively improve the transfer power of the stepless transmission and has the advantages of large force transmission, high rotating speed, stable running, reliable work, and the like.

Description

technical field [0001] The invention belongs to the field of mechanical transmissions, in particular to a high-power continuously variable transmission for automobiles. Background technique [0002] Continuously variable speed is the ultimate goal of automotive transmission development. The principle of the existing continuously variable transmission is all the way of friction transmission of power, and the transmitted power is relatively small. The fundamental way to realize high-power continuously variable transmission should be gear transmission, and this problem has not been effectively solved. For example, a sliding toothed belt type continuously variable transmission, the sliding plate on the toothed belt can be embedded in the radial chute on the driving wheel to play the role of tooth transmission, and the sliding plate can move in the chute to change the driving radius to realize infinitely variable speed . Due to this structure, when the sliding plate and the ch...

AI Technical Summary

Problems solved by technology

The fundamental way to realize high-power continuously variable transmission should be gear transmission, but this problem has not been effectively solved

The disadvantages of this structure are: first, the locking slider of the planetary gear one-way clutch is easy to slide, and cannot transmit large power; In the non-meshing state, the corresponding position between the tooth and the tooth groove causes the two to collide and interfere during the meshing process. Even if the backlash with spring return is adopted, the collision interference cannot be eliminated, and the backlash will also be caused by the backlash. The third is that the rotation plane surrounded by multiple planetary gears is not a circle but a polygon, which leads to the unfixed tangent point between the tooth chain and the rotation plane during work, causing radial runout of the tangent point, causing the tooth chain Vibrates and causes periodic changes in the tightness of the tooth chain

These cannot meet the needs of high-speed and high-power transmission power

At present, automotive continuously variable transmissions can only be used in small cars with small and medium displacement.

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