A transmission based on planetary gear with few teeth difference

Abstract

The invention relates to a transmission based on few tooth difference planetary gears. The transmission comprises a shell, a crankshaft arranged in the shell and multiple stages of differential type few tooth difference planetary gears connected to the crankshaft in series, the adjacent differential type few tooth difference planetary gears are connected through first crank structures, the differential type few tooth difference planetary gears are rotationally connected with the crankshaft through bearings, and a power input shaft and a power output shaft are further included. The power inputshaft is rotationally connected with the shell, one end of the power input shaft is located outside the shell, and the other end of the power input shaft is connected with the crankshaft and an innergear ring of the first-stage differential type few tooth difference planetary gear through a first clutch and a second clutch correspondingly; and the shell is provided with brakes corresponding to the inner gear rings of the multiple stages of differential type few tooth difference planetary gears in a one-to-one manner, the power output shaft is rotationally connected with the shell, one end ofthe power output shaft is connected with an outer gear cycloidal gear of the last-stage differential type few tooth difference planetary gear through a second crank structure, and the other end of thepower output shaft is located at the exterior of the shell.

Description

technical field [0001] The invention relates to a transmission mechanism, in particular to a transmission based on a planetary gear with a small tooth difference. Background technique [0002] A gear transmission is a mechanical device with a wide range of applications. And with the rapid development of modern industry and the continuous improvement of mechanization and automation, the requirements for transmissions are also getting higher and higher. Small size, light weight, large speed range, high efficiency, strong carrying capacity, and long life have become the development direction of modern transmissions. Whether it is the gear transmission with external meshing in the traditional manual transmission or the general-purpose Simpson planetary gear transmission in the modern automatic transmission, it cannot realize the transmission with a large speed ratio while realizing the stepped speed change, and only has a small transmission ratio. Generally, the transmission ra...

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Problems solved by technology

[0004] However, most of the current planetary gear transmission technology with small tooth difference is applied in the reduction gear, and it is not easy to realize the stepped speed change while realizing the large transmission ratio, which limits the further promotion and application of this technology, such as The Chinese invention patent with the application number CN201510827603.3 cannot realize multi-level speed regulation

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