A hydraulic lifting control system for a twin-tire lifting axle

Abstract

The invention discloses a hydraulic lifting control system for a double-tire lifting axle. The hydraulic lifting control system for the double-tire lifting axle comprises an oil tank (12), a filter screen (13), a motor (14), an oil pump (15), a check valve (16), a reversing valve (17), a one-way throttle valve (18), a lifting oil cylinder (7), an overflow valve (19) and an oil pipe (26), wherein the motor (14) is connected with the oil pump (15); the filter screen (13) is arranged between the oil tank (12) and the oil pump (15); the check valve (16) and the overflow valve (19) are respectively arranged on the outlet of the oil pump (15); the one-way throttle valve (18) is arranged on the rod cavity oil path of the lifting oil cylinder (7); the oil pipe (26) between the one-way throttle valve (18) and the rodless cavity of the lifting oil cylinder (7) is provided with a hydraulic load sensing valve (20); the valve core (31) of the hydraulic load sensing valve (20) is connected with a connecting rod (23) fixedly arranged on a drive axle by a control arm (25). The hydraulic lifting control system for the double-tire lifting axle has a novel design, and the finished automobile driving and braking performance can be improved.

Description

technical field [0001] The invention relates to a hydraulic lift control system, more specifically to a hydraulic lift control system for twin-tire lifting bridges, which is mainly used in 6X2 vehicle models. Background technique [0002] The lifting axle refers to the axle that can be lifted and lowered freely, and the tire can be lifted off the ground after being lifted. Most of the existing lifting axles are auxiliary axles without driving force. The twin-tire lifting axle model has the characteristics of saving tires and fuel, and has good economy, and is widely used in the market. The axle load distribution of the driving axle and lifting axle has two modes: equal ratio distribution and driving force priority, which have a great influence on the braking and driving performance of the vehicle. In the equal ratio distribution mode, the axle load ratio of the driving axle and the lifting axle is a fixed ratio, generally about 1.3. Since the axle load difference between t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hydraulic lifting control system for twin-tire lifting axles to solve the problem that the existing hydraulically controlled twin-tire lifting axle vehicles are prone to insufficient driving force when the vehicle is on a smooth road and the weight of the goods transported is relatively light.

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