In the special vehicle, there is a road rescue vehicle, also known as the wrecker. Use of wrecker: mainly used for road breakdown vehicles, urban illegal vehicles and rescue. The wrecker is mainly divided into: tow coupling type, tow separation type, one tow type, one flat tow type, multi-functional wrecker, hydraulic automatic clamping type and so on. When choosing the type of wrecker, it is also selected according to the actual use environment, and the different working environment determines the selected wrecker. For example, when it is necessary to lift a wrecker that has turned over into a ditch at the time of rescue, then it is necessary to achieve a flat wrecker with a car sling. 
The main working parts of the tow crane wrecker are composed of lifting mechanism, bracket mechanism and amplitude changing mechanism. When working, the hydraulic cylinder of the amplitude changing mechanism and the hydraulic cylinder of the amplitude changing mechanism jointly coordinate to make the bracket flat to the designated working point. Then, the hoist of the lifting mechanism and the hydraulic cylinder of the amplitude changing mechanism jointly act to loosen the hook directly above the hook part of the car, and then lift the front to the bracket through the hook to install the remaining part of the bracket. Then the front wheel can be fixed on the bracket arm with the fastening device, and then the clearance of the damaged vehicle can be realized. 
The basic principle of the tow separation wrecker is the same as that of the tow combination wrecker. These two kinds of wreckers generally clean heavy duty vehicles. The flat wrecker is a popular type of wrecker at present, which can achieve the function of one tow two, the flat part can realize the lossless transport of the faulty vehicle, the bracket part can also realize the towing of the damaged vehicle, and the cleaning of two damaged vehicles can be completed at one time with high efficiency. The integral plate wrecker is mainly composed of lifting mechanism, plate sliding mechanism, traction mechanism and bracket mechanism. In the flat wrecker, there are several types of plates, including the tail hydraulic flip plate, flat plate, sinking plate, hydraulic expansion plate, folding plate and integrated plate. In addition to the sinking plate, the other plates are the tail plates are a function, in order to facilitate the failure of the car on the board; The sinking plate is not the same, the difference between this board is that the auxiliary beam and the girder are safely fitted, and the advantage of this is that the whole plate will be lower from the ground, and the slope will be smaller. 
The landing forms of flat plate wrecker are full landing and half landing; Full-floor wrecker refers to a wrecker that can completely fall to the ground. This wrecker is designed for sports cars with lower chassis, with hydraulic winch and rear support arm, and has the function of dragging two. Because the whole floor structure is more complex, the carrying capacity of the flat plate in operation is very small, so the business scope is also small. The semi-floor wrecker refers to the flat tail plate landing, and the flat plate is sloping, so that the fault car can be driven up or pulled up by hydraulic lifting, which is very convenient. This landing method is also the most common landing method in the flat wrecker. The above is the structure and classification of the wrecker, you can understand, when buying a car to choose the most suitable for their own wrecker, want to know more models can also pay attention to me
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