Introduction: Truck mounted cranes are not only divided into large and small tonnage, but also can choose the form of boom. Truck-mounted cranes can choose straight boom and folding boom cranes, each with its own advantages and disadvantages.
One. Scope of application
1. Straight boom truck mounted crane has a long boom, and a luffing cylinder controls the lifting of the boom. The working radius and lifting height are large. It is mainly suitable for stations, docks, construction sites, construction works and other fields, often in open environments Undergoing operations, such as hanging trees, wire poles, steel bars, bridges, etc.;
2. The folding arm truck mounted crane is controlled by multiple cylinders to control the expansion and rotation of the boom. Like a joint, it is free to expand and contract, and is flexible to lift. It is mainly used in warehouses, indoors and other relatively narrow environments, such as warehouse loading and unloading, indoor moving, etc. ；
two. Parameter comparison
1. Take XCMG’s 10-ton truck mounted crane as an example. The straight-arm truck-mounted crane has a working radius of 12 meters and a lifting height of 14 meters. The folding arm truck-mounted crane has a working radius of 9.75 meters and a lifting height of 12.5 meters;
2. XCMG’s 10-ton knuckle boom truck crane has a dead weight of 3.47 tons, the front outrigger span is 5.7 meters, the straight boom truck crane has a dead weight of 3.76 tons, and the front outrigger span is 5.58 meters;
3. With the same tonnage, same angle and working radius, the straight boom truck crane has a heavier lifting weight than the folding boom truck crane. XCMG’s 10 ton straight boom crane can lift 3.2 tons horizontally when the working radius is 7 meters. When the boom crane has a working radius of 7 meters, it can only lift 2.6 tons horizontally;
three. Select reference
1. Straight boom truck-mounted crane has a large working radius and large lifting height, and the boom can be extended longer. It can complete the work that the folding boom truck-mounted crane cannot reach. Choose a straight-arm truck-mounted crane for long-term operation in an open and wide environment. Suitable;
Working in relatively narrow locations such as factories, the height of the straight boom truck crane is about 3.2 meters to 4 meters, and the height of some workshops is more than 4 meters. In this way, the boom of the straight boom truck crane cannot be lifted. The weight capacity is limited, and the folding arm truck-mounted crane can fully function;
2. The distance between the boom of the straight-arm truck-mounted crane and the bottom of the cargo box is more than 2 meters. Take the transport of the movable board house as an example. The height of the movable board house is above 3.5 meters. The boom can only be raised during transportation. Sections with restricted height cannot be passed. The common practice is to turn the boom to the front of the cab. The folding boom truck-mounted crane is to fold the boom and place behind the cab. The boom and the goods do not affect each other during transportation;
3. The folding arm truck-mounted crane is composed of multiple hydraulic cylinders, and each section of the folding arm can be controlled through the cylinders, which makes the operation more flexible and the lifting position more accurate;
Summary: Straight boom truck-mounted cranes and folding boom truck-mounted cranes have their own strengths. The type of boom is mainly selected according to the environment commonly used by truck-mounted cranes.
