4WD transfer case with Park function

Abstract

The invention relates to a four-wheel drive transfer case with a parking function. The four-wheel drive transfer case with the parking function comprises a front drive axle transmission shaft, a rear drive axle transmission shaft, a differential mechanism shell and a hollow shaft. The differential mechanism shell is arranged between the front drive axle transmission shaft and the rear drive axle transmission shaft and is close to the rear drive axle transmission shaft. A differential mechanism front side gear shaft and a differential mechanism rear side gear shaft are arranged in the differential mechanism shell. The hollow shaft is arranged between the front drive axle transmission shaft and the differential mechanism shell, the differential mechanism front side gear shaft penetrates through the hollow shaft and is connected with the front drive axle transmission shaft through a coupling, and the differential mechanism rear side gear shaft is connected with the rear drive axle transmission shaft through a coupling. The end of the differential mechanism front side gear shaft and the end of the hollow shaft are provided with spline tooth hubs respectively, and the two spline tooth hubs are sleeved with a parking-stalls gear shift joint spline sleeve. Through the structure of the four-wheel drive transfer case with the parking function, steep slope parking gradient of a cross-country vehicle can be increased, and safe parking of the cross-country vehicle on a rampway can be achieved.

Description

technical field [0001] The invention relates to a four-wheel drive transfer case with parking function, which is used in four-wheel drive off-road vehicles. Background technique [0002] At present, most of the parking systems of four-wheel-drive off-road vehicles use the parking brake to brake the rear axle. As long as the braking torque of the rear axle is large enough, it can be guaranteed that the rear wheels will not rotate when parking on a slope. But whether the whole vehicle can stop depends on whether the adhesion of the rear wheels can offset the sliding component force of the gravity of the whole vehicle along the slope. Sometimes the slope is too steep, although the rear wheels will not turn, but because there is a differential between the front and rear axles, and the front axle has no parking brake, the front axle wheels can still turn, and the adhesion of the front axle wheels cannot be used to offset The component force of the vehicle's gravity sliding down ...

AI Technical Summary

Problems solved by technology

Sometimes the slope is too steep, although the rear wheels will not turn, but because there is a differential between the front and rear axles, and the front axle has no parking brake, the front axle wheels can still turn, and the adhesion of the front axle wheels cannot be used to offset The component force of the vehicle's gravity sliding down the slope can only be offset by the adhesion of the rear wheels. At this time, the wheels of the front axle are rotating and the rear wheels are sliding on the road, causing the vehicle to slide along the slope. The road slips, which is prone to safety accidents

Images