Travelling control device for engineering vehicle

Abstract

The invention relates to a travelling control device for an engineering vehicle. The travelling control device comprises a valve body, a plug, a valve core, a spring, a proportional overflow valve anda check valve, wherein a first oil port, a second oil port, an oil return port, a control oil port, a first mounting hole and a second mounting hole are formed in the valve body, the plug is fixedlyconnected to the lower end of the second mounting hole, the valve core is arranged in the second mounting hole and can control the communication area size of the first oil port and the second oil port, the proportional overflow valve is used for controlling the pressure in a control chamber. The travelling control device for the engineering vehicle is simple in structure and compact in size, and the travelling control device can realize anti-skid and prevent empty suction of a travelling motor of the engineering vehicle.

Description

technical field [0001] The invention belongs to the technical field of engineering vehicles, in particular to a walking control device for engineering vehicles. Background technique [0002] Engineering vehicles generally have a relatively large weight, and the road environment where they are driven is harsh. In order to meet the characteristics of large tonnage, large gradeability, and flexible steering of engineering vehicles, hydraulic travel is often used on medium and large engineering vehicles. Existing engineering vehicles mostly use closed hydraulic circuits for hydraulic travel. By changing the direction of the swash plate inside the closed pump in the closed hydraulic circuit and changing the direction of pump oil, the forward and backward switching of the vehicle can be realized. By changing the direction of the closed pump The angle of the internal swash plate changes the displacement of the pump so as to realize the adjustment of the vehicle’s walking speed. The...

AI Technical Summary

Problems solved by technology

[0003] When engineering vehicles are driving on muddy or potholed roads, it is very easy to slip due to the small adhesion between the wheels and the road surface. When slipping occurs, the flow rate of the motor on the side where slipping occurs in the same hydraulic closed circuit will be greatly reduced. increase, the pressure in the hydraulic closed circuit cannot be established, which further reduces the adhesion between the non-slipping wheels and the road surface in the same hydraulic closed circuit, which brings trouble to the driver's driving

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