Safety protection deice for engineer working vehicle

Abstract

The invention relates to a safety protective device for an engineering operation vehicle, which is arranged in a cab and comprises a first intermediate relay and a second intermediate relay, wherein a coil of the second intermediate relay is arranged between a power takeoff power supply and a brake grounding signal wire; a normally-open contact of the second intermediate relay is connected with a power takeoff switch in series on a power cord of a vehicle emergency computer; one end of the coil of the first intermediate relay is connected to a power supply of the power takeoff through the power takeoff switch and the normally-open contact of the second intermediate relay, while the other end is connected with a brake grounding signal, and the normally-open contact of the first intermediate relay and the switch of the vehicle emergency computer are connected in series on the power cord of the vehicle emergency computer. The device has a simple structure and good safety protective effect, puts an end to the hazard caused by misoperations, effectively avoids heavy loss, ensures the personal safety and the property safety, can be connected with the prior line thereof conveniently, is suitable for various special vehicles at home and abroad, greatly reduces the maintenance and repairing cost, and has extra-high economic value.

Description

technical field [0001] The invention relates to the technical field of safety protection in engineering operation vehicles, in particular to a safety protection device used in engineering operation vehicles. Background technique [0002] At present, the manufacturers of special vehicles all produce various engineering operation vehicles through vehicle refitting. Up to now, there is no special vehicle factory for researching, designing and producing various vehicles with special operation functions. Manufacturers of construction work vehicles mostly use a certain brand of "tops" to install them on the chassis produced by a certain factory, and then equip them with reasonable cabs to form construction work vehicles with special functions. The so-called "uploading" refers to the part of the equipment equipped on the upper part of the chassis to make the engineering vehicle have special functions, such as ordinary bucket arms, cranes, high-altitude insulating bucket arms, and h...

AI Technical Summary

Problems solved by technology

Although there are prompts such as "turn off the switch" after operation and "forbidden to open" while driving in the vehicle instruction manual, there is no warning device in the cab, and it is difficult to judge the exact position of the operation switch. Once a serious accident occurs, the responsibility cannot be divided , once there is a misoperation, such as a moving dump truck driving at high speed without putting down the dump bucket, once it hits a railway bridge and culvert, the direct and indirect losses will be immeasurable

[0003] There is also a potential safety hazard in engineering work vehicles using hydraulic devices, that is, after the operation is over, because there is no light display and backup protection when the power take-off switch is pulled, it is easy to forget to turn off the power take-off, and the pressure of the oil pump of the driving vehicle will decrease. Increased by several times, the pipeline is very prone to fatigue damage, and in severe cases, it will cause pipeline burst and damage to the gearbox transfer case. If it is not discovered in time, it will seriously endanger the life safety of the operators.

[0004] like figure 1 As shown, the above defects are mainly due to the fact that there is only a power take-off switch K1 between the PTO power supply, and there is only a vehicle emergency computer switch K2 between the vehicle emergency computer and the vehicle emergency computer power supply. There is no interlock control between them, and they are all controlled by the driver themselves, which is prone to misuse and cause major or extraordinarily serious incidents

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