Straight arm cranes for heavy/long hoisting in open areas; folding arm ones for flexible narrow-space operation with lower load capacity.
Telescopic arm :
1: The goods shall not exceed the height of the boom
When the car is driving, the lower part of the boom of the straight-arm crane is horizontally between the cab of the car and the car carriage, and the boom is placed longitudinately on the carriage [the goods cannot exceed the height of the boom].
2: Telescopic arm crane working radius is wider
Under the same arm length, the telescopic arm truck crane can also expand the depth of the work by placing a long wire hook, while the folding arm truck crane is not easy to complete the work that requires deeper.
3: The telescopic arm is easier to control vertical take-off and landing
The telescopic arm adopts the lifting mechanism of wire rope, which can strictly control the take-off and landing of the lifting objects, while the folding arm crane adopts hydraulic cylinder, which is difficult to control the vertical take-off and landing of the lifting objects. :
4: The operation of the telescopic arm is relatively simple
The telescopic arm crane adopts the lifting mechanism of reel retracting and lowering steel wire, which is relatively simple to operate, while the folding arm crane crane has multiple hydraulic cylinders, which is similar to the action of the manipulator, which is relatively difficult to operate.
5: The telescopic arm is easier to install on the whole vehicle chassis:
The telescopic arm is relatively loose in structure, which is conducive to the dispersion of the vehicle load, and the center of gravity is far away from the installation position, especially when lifting heavy objects, which is more conducive to the dispersion of the chassis shaft load.
The use of folding arm crane, whether in the middle or rear, due to its structure is relatively concentrated, the center of gravity is easy to concentrate on a certain axis of the chassis, often a large load on a bridge, is not conducive to the installation of the vehicle.
Folding arm:
1: The boom does not affect the loading of goods
When the car is driving, the folding arm crane is placed horizontally between the cab and the car carriage in a folded state [does not affect the loading of goods].
2: Folding arm crane working efficiency is higher
Because the folding arm crane adopts a number of hydraulic cylinders to form a similar joint arm connection mechanism, it can complete the action faster and work more efficiently.
The telescopic arm [straight arm] truck crane uses a set of steel wire rope lifting mechanism, the reel is turning to collect the rope, the hook rises, the reverse release rope hook falls, its working efficiency is low.
3: Folding arm is more suitable for narrow working environment
This is determined by its structure, the folding arm truck crane is more suitable for a relatively small working environment such as a factory warehouse, and the telescopial arm has a larger display space due to its structure.
4: The folding arm can be equipped with various accessories:
The folding arm crane adopts the device of hydraulic cylinder to form a device similar to the articulated arm manipulator, which can be equipped with empty working platform, working bucket, fixture, hanging basket, plate fork, various high grips, auger, tire loading manipulator and pile extractor and other auxiliary tools. Since the front end of the telescopic arm is a flexible wire rope, it is rare to see the telescopic arm equipped with auxiliary devices. :
5: The folding arm takes up less space on the vehicle
The space occupied is clear at a glance, the folding arm can shrink the entire boom together when transporting goods, occupying a relatively small space, and the telescopic arm can only be placed horizontally, and the vehicle occupies a larger space when driving. :
6: The price of folding arm is higher than that of telescopic arm
The folding arm crane structure is relatively complex, the accuracy is also higher, the manufacturing cost price is generally relatively high, the telescopic arm structure is relatively simple, the manufacturing accuracy requirements are relatively low, and the overall cost is relatively low.
