Speed changing driving device for special four-wheel offroad vehicles

Abstract

The present invention provides a shift driving device for a special four-wheel off-road vehicle, comprising a back drive axle provided with a power input shaft and a front drive axle driven by an output shaft therein; wherein, the back drive axle is internally assembled with a planetary reducing mechanism, a shifting mechanism, a main driver and a differential; a ring gear base assembled with a planetary big ring gear is fixed on the casing of the back drive axle; a sun gear realizes the connection with the input shaft through a spline, and a planetary gear assembled on the planetary frame is respectively meshed with the sun gear and the planetary gear; the fork of the shifting mechanism is driven by the inner rocker and moves axially so as to lead a combination sleeve to connect the input shaft with the two shafts by the spline or connect the two shafts with the planetary frame by the spline. Apart from having a reasonable structure design, meanwhile satisfying the trafficability of the four-wheel off-road vehicle, the present invention realizes that the vehicle can run at a walking speed as necessary; compared with the same reducing device, the driving mechanism of the present invention has simple operation, which can drive the power after shifting to the front drive axle, thus providing easier assembly and maintenance, and being good for reducing the cost.

Description

technical field [0001] The invention relates to a driving device for a four-wheel off-road vehicle, in particular to a variable-speed driving device for a special four-wheel off-road vehicle equipped with a shift mechanism, a planetary reduction mechanism and the like. Background technique [0002] Traditional four-wheel off-road vehicles are usually assembled with a wheel-side reduction device in order to improve passability; in order to realize the switching and transmission of power to the forward drive device, a transfer device is usually assembled; some drive devices use four main drives, two Ordinary differential gear structure (as publication number is CN1785705A " high-performance four-wheel off-road vehicle power drive transmission system "), can implement differential transmission between diagonal wheels, and each main transmission is only to a wheel transmission. All of the above devices have problems such as complicated structural arrangement, high manufacturing ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a variable speed drive device for a special four-wheel off-road vehicle, which effectively overcomes the shortcomings of complex structure, difficult assembly and maintenance in the prior art, and its structural design is reasonable, meeting the needs of four-wheel off-road vehicles At the same time, it can meet the special speed change requirements that the vehicle can run at walking speed when needed, and output larger torque to the driving wheels; compared with similar reduction devices, its transmission mechanism is easy to operate, and the power can be increased High-speed rear-to-front drive axle transmission makes assembly and maintenance easier and helps reduce costs

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