Hydraulic control system of dump truck with truck-mounted gripper

Abstract

The invention relates to a hydraulic control system of a dump truck with a truck-mounted gripper. The hydraulic control system is characterized by comprising a fuel tank (901), a two-position three-way manual switching valve (902), an electromagnetic unloading valve (903), an upper computer valve group (904) and a lower computer valve group (905); a plunger pump is driven to rotate by the auxiliary output end of an engine through a transmission shaft, and hydraulic oil is input into the two-position three-way manual switching valve from the fuel tank by the plunger pump; the oil is supplied tothe upper computer valve group (904) and the lower computer valve group (905) through the two-position three-way manual switching valve; the front end of the upper computer valve group (904) is provided with the external electromagnetic unloading valve (903), and electric signals are supplied to the electromagnetic unloading valve (903) through pressure sensors (318) in cavities without piston rods in left and right support legs; and the electromagnetic unloading valve (903) plays a role in protection of the action of the upper computer valve group (904). The hydraulic control system of the dump truck with the truck-mounted gripper has the advantage that the gripping safety factor is improved.

Description

technical field [0001] The invention relates to a dump truck with a grab on board, in particular to a hydraulic control system for a dump truck with a grab on board. Background technique [0002] The loading and unloading of the goods on the traditional transport vehicle are all carried by manpower, or realized by an external grabbing mechanism. Manual handling will use a lot of manpower, and the efficiency is low, and there are potential safety hazards; the external grabbing mechanism needs an external grabbing mechanism for loading, and an external grabbing mechanism for unloading. , especially for outdoor places, it is difficult for the grabbing mechanism to reach the destination, and the grabbing of the external grabbing mechanism is only suitable for fixed-point grabbing, and the environmental adaptability is poor. The Chinese patent No. 201620796719.5 discloses a transport vehicle with a vehicle-mounted grasping mechanism at the rear, which can solve the above-mention...

AI Technical Summary

Problems solved by technology

[0004] 1. Since the vehicle-mounted grasping mechanism is set at the rear section of the transport vehicle, the transport vehicle with this structural layout does not have the self-unloading function, so it can be considered to set the vehicle-mounted grasping mechanism at the middle section of the transport vehicle, so that the rear The compartment can realize self-unloading function, see Figure 1-Figure 4 However, the arm of the traditional vehicle-mounted gripping mechanism is a straight arm. Due to its large size, it still occupies a large space in the non-working state. Therefore, the arm of the vehicle-mounted gripping mechanism is located directly above the compartment when the vehicle is running. Yes, when the vehicle arrives at the destination and needs to be unloaded, it is necessary to lift the arm of the vehicle grabbing mechanism first, otherwise the arm of the arm of the vehicle grabbing mechanism will affect the self-unloading function of the car. The lowering of the arm of the vehicle grabbing mechanism makes the vehicle self-unloading process more cumbersome, so it is considered to develop a vehicle-mounted grabbing mechanism in the form of a folding arm facing the side

[0005] 2. Since the traditional transport vehicle with a vehicle-mounted grasping mechanism grabs materials, the two support legs under the grasping mechanism are used to support the vehicle body. When the vehicle is grasping the materials on the left and right sides of the carriage, If the material is overweight, it may cause the vehicle to roll over. If the arm of the traditional vehicle is a straight arm, the winch is used for telescopic and lifting. The range finder is installed on the steel rope of the winch, but the arm is folded The winch cannot be installed on the vehicle-mounted grab mechanism, so the rangefinder cannot be installed, so the anti-rollover function cannot be realized;

[0006] 3. The arm of the traditional vehicle-mounted grabbing mechanism only uses an automatic anti-off device, which is an inertial self-locking device. In general, it is used in conjunction with the interlocking of the oil cylinder, but in emergencies, such as sharp turns, sideways Turn over, when hit, it will be opened automatically by the impact, and cause secondary damage;

[0007] 4. The gripper of the traditional car-mounted gripping mechanism has only two petals, four petals, five petals, and six petals. difficult to meet

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