Guide: The operation of the truck-mounted crane is stable and unstable. Look at the crane and the outriggers. I believe that friends from the truck-mounted crane have heard of such a situation. The crane overturned during the lifting process. How could this happen? It is actually an outrigger. Did not choose XCMG outrigger as an example.
When many people choose a truck-mounted crane, the chassis and crane have been known many times, but they have ignored the choice of outriggers.
1. Outrigger classification:
Truck crane outriggers are mainly divided into front outriggers and rear outriggers. The front outriggers are standard equipment for truck cranes. The rear outriggers can be selected. They are divided into fixed rear outriggers, single-cavity hydraulic rear outriggers, and dual-cavity hydraulic Back leg.
two. Outrigger structure:
1. Fixed rear outriggers means that the outriggers can only extend up and down through the hydraulic cylinder, and cannot extend and retract horizontally. The span of the outriggers is the distance between the centers of the two outriggers, about 2.5 meters;
2. The single-chamber hydraulic rear outriggers share a single outrigger box, which can extend and retract in the horizontal direction as well as up and down. The outrigger span is 3.55 meters;
3. The dual-cavity hydraulic rear outrigger means that the left and right outriggers have independent outrigger boxes, which can be stretched horizontally, up and down, and the outrigger span can reach 4.75 meters;
three. Select leg:
1. The larger the outrigger span, the better the stability. This is true, but the one that is suitable is the best. Small truck-mounted cranes are matched with dual-cavity hydraulic rear outriggers, which is overkill, not compatible, and large trucks. Lifting and fixing the rear outriggers, the lifting is not stable enough;
2. The blue-brand truck-mounted crane, which is equipped with XCMG’s 5 ton crane, the rear outrigger can not be installed according to the needs, and the operation environment of uneven road surface, the rear outrigger can be fixed or single cavity after installation Choose from hydraulic rear outriggers;
3. For medium-sized truck mounted cranes, when the crane is equipped with XCMG 6.3 tons to 12 tons, the rear outriggers are often equipped with single-cavity hydraulic outriggers. The rear outriggers extend and the span can reach 3.55 meters, which can fully satisfy the stability of medium-sized trucks. Claim;
4. Large truck mounted crane, the crane is equipped with XCMG 14 tons or 16 tons, XCMG 14-ton crane can reach 15.8 meters, 16-ton crane can reach 18.5 meters, long-distance lifting operation, it is recommended to install double-cavity hydraulic rear support Legs, stability will be better.
four. Identify the legs:
1. The rear outrigger is an add-on part and can play an important role in support. It may be shoddy. It is recommended to choose the original manufacturer;
2. The original outrigger material of XCMG is the same as that of the boom, with high strength. The outrigger cylinder is made by XCMG, with strong specificity, sufficient hydraulic power and fast expansion speed;
3. The imitation outriggers are manually welded, and the cylinder adopts ordinary general-purpose parts, and the expansion speed is slow.
In summary: the outriggers play an important role in the operation of the truck-mounted crane. When choosing the outriggers of the truck-mounted crane, you must recognize the original outriggers and choose the appropriate outriggers according to the selected crane tonnage.
5. The price of hydraulic outrigger:
1. For the hydraulic outriggers of small factories on the market, the market price of single-cavity hydraulic rear outrigger is 3500 yuan, and the market price of double-cavity hydraulic rear outrigger is 5,000 yuan;
2. XCMG original fixed hydraulic rear outrigger is 6000 yuan, XCMG original single-cavity hydraulic rear outrigger is 8500 yuan, XCMG original dual-cavity hydraulic rear outrigger is 12,000 RMB
