The structure of the truck crane

First, the structure of the truck crane

The truck-mounted crane is equipped with a boom-mounted truck crane on the finalized truck, and can complete the cargo vehicle's own utility vehicle. Therefore, it has both the function of a popular truck and the function of the crane. In addition to the loading and unloading of the cargo compartment of the capital car, the cargo loading and unloading between the carriage and the carriage and the completion of other loading and unloading tasks can be completed, so that it has been carried out in recent years.

The types of cranes used to lift trucks can be classified into two types, hydraulic and mechanical. Because the hydraulic crane has a compact structure, convenient operation, low quality and other advantages. Therefore, the truck-mounted crane trucks are all equipped with hydraulic cranes.

According to the absolute status of the crane in the car, the truck-mounted crane truck can be divided into three types: front, center, and rear, as shown in Figure 5-1.

The front-mounted crane device is between the driver's cab and the car cabin. As shown in Figure 5-1 (a), this type of lifting device can only be used for loading and unloading packaging components. Goods and containers. This type of plug-in can fully utilize the area of ​​the cargo box and ensure that the boom can reach all positions in the carriage under the premise of the permitted extension length and the response activity. In addition, the hydraulic pump device is used as the launcher at the front of the vehicle. At the same time, the pipeline from the hydraulic pump to the crane's pneumatic cylinder is short, the moving resistance is small, and the hydraulic moving efficiency is higher than that of other plug-in types. Therefore, this type of construction is often adopted. When stopping the installation of the vehicle for this type of vehicle, it is necessary to pay attention to avoid overloading the front axle. 2. The mid-mounted mid-mounted crane is mounted on two sides of the car, as shown in Figure 4-1 (b). This type of lifting capacity is usually within the scale of 1 to 3 tons, and the extended long-size car is used. Chassis. This type of plug-in type is characterized by short booms, easy assignment of axle loads, and the ability to adhere to the status of the center of gravity of the original car. It is suitable for loading and unloading and transporting uniform lengths of pipe, construction materials, strips and timber, etc. The carriage is placed longitudinally, but because the crane is inserted in the middle of the carriage, the application rate of the carriage area is low. 3. The rear-mounted rear-mounted crane device is at the rear of the automobile compartment, as shown in Figure 5-1 (c). For on-board crane trucks with trailers, which are characterized by a high rate of application of the area of ​​the carriage, the lifting arm can complete the loading and unloading work between the car and the trailer. But because this kind of placement is the crane's security at the tail of the vehicle. The helium effect that this brings is the change of the axle loading of the original car, which results in poor operability. In addition, the main frame needs to be retrofitted and the loading condition deteriorates.

For more details click here