Dumper

Abstract

The invention discloses a dumper which comprises a chassis engine, a running system and a hydraulic driving system with a closed top cover, wherein the running system comprises a transmission case; the hydraulic driving system with the closed top cover comprises a hydraulic pump, a hydraulic execution unit, a control valve and an oil tank, wherein the hydraulic execution unit is connected with theclosed top cover, the control valve is arranged in an oil way between the hydraulic execution unit and the hydraulic pump, two working oil ports of the control valve are respectively connected with two oil inlet and return ways of the hydraulic execution unit, an oil inlet of the control valve is connected with an oil outlet of the hydraulic pump, and an oil inlet of the hydraulic pump and an oilreturn port of the control valve respectively communicate with the oil tank; and the transmission case and the hydraulic pump are respectively in transmission connection with the chassis engine. Thedumper disclosed by the invention has the advantages that on one hand, the closed top cover is large in working force and high in speed; and on the other hand, the hydraulic driving system with the closed top cover can be driven to work by the chassis engine when a vehicle is in a running state or a parking state so as to avoid the problem that the closed top cover only can be operated after the vehicle is parked, thereby improving the working efficiency.

Description

technical field [0001] The invention relates to the technical field of engineering vehicles, in particular to a dump truck. Background technique [0002] Dump truck is a kind of transportation vehicle that can unload goods by itself. It has the characteristics of automatic unloading and strong mobility, which can improve the efficiency of cargo loading and unloading, save labor and time costs, and has become one of the most important vehicles for cargo transportation today. It has been used in Widely used in urban construction, highway construction, water conservancy engineering and energy industry and other industries. [0003] Traditional dump trucks have a serious problem of spilling and leaking materials. Today, with increasingly stringent environmental protection requirements, environmentally friendly dump trucks are more and more widely used. In cities, traditional dump trucks are gradually replaced by environmentally friendly dump trucks. The top covers of environmen...

AI Technical Summary

Problems solved by technology

Problems existing in the direct drive mode of the geared motor: small working force, slow speed, easy to burn the motor and insurance under severe working conditions

Problems in the way of connecting the transmission power take-off to the oil pump: Although the working force is large and the speed is fast, the oil pump can only work after the vehicle stops and the power is taken off, which affects the driver's work efficiency

Problems existing in the motor oil pump hydraulic power unit method: Although this method solves the problem that the power take-off of the gearbox can only be stopped to take power and the working force of the deceleration motor is small, the hydraulic power unit of the motor oil pump is in order to obtain a large working force and The motor power required for fast work is high, which can easily cause battery power loss. In addition, the high-power DC motors are all short-time motors, which can last for a short working time and are expensive.

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