Progresive stepless variable speed gear

Abstract

The progressive stepless speed variator includes two speed limiter controlled speed regulating sun wheels, the third planetary gear set with carrier fixed to the first gear ring; the first planetary gear set carrier and the second planetary gear set carrier fixed to form one integral structure and connected to the output shaft; the first planetary gear set meshed to the first gear ring and the input sun wheel, the second planetary gear set meshed to the second gear ring and the second speed regulating sun wheel, and the third planetary gear set meshed to the second gear ring and the first speed regulating sun wheel; and the first gear ring supported on the non-return bearing with limited rotation direction. The present invention can alter the output rotation speed and torque timely to optimize the operation state in wide speed varying range and thus has high efficiency, low fuel oil consumption and less waste gas exhaust.

Description

technical field [0001] The invention relates to a progressive stepless speed change device realized by a planetary gear mechanism, which is suitable for speed change transmission in automobile transmissions and engineering machinery. Background technique [0002] In the industrial field, CVTs capable of high-power transmission are rare. For example, in the automobile industry, most of the existing automobiles use manual or automatic CVTs, and their efficiency is usually only about 65%. Therefore, various automobile industries are developed. All countries are devoting themselves to the research and development of continuously variable transmissions. Continuously variable transmissions can not only maintain the highest efficiency of automobile engines under various working conditions, but also reduce the fuel consumption rate of the engines, thereby reducing exhaust emissions. [0003] The application fields of continuously variable transmissions are mainly in the automobile a...

AI Technical Summary

Problems solved by technology

[0003] The application fields of continuously variable transmissions are mainly in the automobile and motorcycle industries. At present, the only mechanical continuously variable transmissions that can be applied are steel belt or belt-type continuously variable transmissions and old-fashioned friction-type continuously variable transmissions, and the popularity rate is extremely low. The CVT is connected by two variable diameter steel wheels with a steel belt. The diameter of the steel wheels requires very precise pressure control, which increases the difficulty of the control technology. If the driving mass is too large, the steel belt will slip. Variable-diameter steel wheels and steel belts wear a lot and have a short lifespan, so steel-belt continuously variable transmissions are limited to compact small and miniature cars, and their efficiency is only about 75%.

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