Tell You About Aolong Crane Trucks

The operation of Dumper Loading Crane, mainly through multi-cylinder manually operated to achieve their action. Usually a single action, there are two cylinders of composite action in a few cases when the lifting operation, in order to simplify the structure, the system uses a hydraulic pump to each actuator series supply mode. Under light load conditions, the actuator can be any combination of each series, so that simultaneous operation of several actuators, such as scaling and rotation, or scaling and amplitude at the same time and so on.

Power truck crane hydraulic system pump are provided by the truck engine mounted on the chassis by gearbox PTO box. Quantitative gear pump high-pressure pump, the engine speed can be artificially controlled by adjusting the throttle, so despite the fixed displacement pump, but its flow output can be within a certain range by controlling the throttle opening size truck to artificially control, enabling variable speed; when the crane is not working, the hydraulic system in the unloading state. The specific circumstances of each portion of the hydraulic system of the work are as follows:

1) Cylinder retractable leg loops around the lorry mounted crane chassis have the legs; through the mechanical mechanism can hide and lay down each leg. In each of the legs are filled with a hydraulic cylinder, leg movement is driven by a hydraulic cylinder. Two front legs and two rear legs respectively, by 1 multiplexer valve three-way manual valve A and B control its extended or retracted. M-type valves are used median function, and the passage in series mode. Make sure each leg extends reliability is critical to go, so that each cylinder has a two-way lock loop to ensure that the legs are securely locked, to prevent the occurrence of "soft legs" phenomenon during lifting operations or Driving during the fall on their own legs.

2) Boom rotation loop slewing mechanism adopts hydraulic motors as actuators. Hydraulic motor can through the worm gear box and a pair of inner gear meshing driven rotary turntable. Due to the low rotary speed of only 1-3 revolution per minute, so the hydraulic motor speed is not high, so there is no need to set up a hydraulic motor brake circuit. Valve 2 is a multi-channel system with three-way manual valve to control dial C positive, reverse and lock the fixed three conditions. The system is in the flow of oil

3) Stretch the loop by the basic boom cranes and telescopic composition, Telescopic cover basic arm among the telescopic hydraulic cylinder with a three-way manual control valve D to drive boom extension and retracted. To prevent falling due to weight leaving the boom, the oil passage is provided with a balanced circuit.

4) Landing loop landing mechanism is the main working body truck starter, which consists of a low speed high torque hydraulic motor to drive the windlass quantitative work. Hydraulic motor is, reverse the three-way manual valve F control. Hoisting speed is adjusted by changing the truck engine speed so as to change the input flow pump output flow and hydraulic motors to achieve. In the way back to the oil hydraulic motor with a balanced circuit, in order to prevent heavy objects fall freely; on the hydraulic motor also has a one-way throttle balanced circuit with single-acting brake cylinder brake circuit composed, when the system does not Work realized by the spring break cylinders on the winch brake force to prevent the lifting heavy decline; when the crane weight lifting, use the brake open delay characteristics, slip phenomenon occurs when the car fell avoid lifting hoist.

Aolongtrucks has reached a huge scale with total assets of 58 billion US dollar, area of 198000 square meters, and plant space of 50000 square meters, 700 employees including 160 professionals and technical, 8 production line, 600 sets of advanced equipment, annual productivity of 5000 units. More info come and visit: http://www.aolongtrucks.com/.

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Introduction Crane Truck of Hydraulic System

Crane Truck is a widely used construction machine which such mechanical energy at a faster walking speed, mobility, adaptability, self-power supply, capable of field operations, flexible and easy to operate, so the transportation, urban construction, fire fighting like Emergency Fire Truck, a large field of materials, infrastructure, and emergency and other fields has been widely used. On the truck crane with hydraulic crane technology, has a large carrying capacity, can work in there are shock, vibration and poor environmental conditions.

Since the implementation of elements of the system operation needs to be done relatively simple, low positional accuracy requirements, so the system manually operated mainly for crane hydraulic system design to ensure reliable and safety is most important.

Truck crane is supporting the truck as the basic section, add the corresponding lift in its feature to form a complete crane trucks, and trucks owned by the power of a hydraulic system powered crane; the crane work, truck tire unstressed, relying on four hydraulic legs to lift the entire truck, crane and portions of the commencement of the lifting operation; when the need to transfer the lifting job site, you need to retract the various parts of the crane on the truck, making truck back to the vehicle transport functional status, were transferred. General truck crane in function has the following requirements

information of crane truck:

1) Machine can easily transfer with trucks to meet their fieldwork mobility, flexible power supply requirements need not be provided;

2) When lifting operation leg mechanism can lift the vehicle so that all truck tires off the ground, from the direct effect of lifting the load, and the hydraulic legs to support the state can maintain the same position for a long time, to prevent soft legs phenomenon occurs when lifting heavy objects;

3) Within a certain range can be adjusted to balance the locking of the boom length and angle of depression, to meet the different requirements for lifting operations;

4) A boom in 3600 can be moved anywhere within the lock;

5) Makes lifting heavy objects within a certain speed range any lift, and can be stopped at any position can load on the vehicle slip phenomenon does not occur when the load starts.

The schematic structure of a truck crane, which mainly consists of the following five parts

1) Leg means when the lifting operation to make truck tires off the ground, set up the vehicle, do not make the load pressure in the tires, and can adjust the level of the vehicle, usually four-legged structure.

2) Make boom slewing mechanism to achieve any rotation 3600, can be locked in any position to stop.

3) Boom telescopic mechanism so that within a certain size range is adjustable and can be positioned to change the working length of the boom. Typically three or four telescopic structure.

4) Luffing jib boom angle adjustable mechanism causes between 150-800 to change the inclination of the boom.

5) Hook landing mechanism causes heavy lifting in the range of any lift and load stopped at any position, lifting and lowering speed within a certain range infinitely adjustable.

If you want to know more about this type of crane truck and other choice, come and visit http://www.aolongtrucks.com/, As the subsidiary company of Aviation Industry Corporation of China(AICC), Aolong Auto is one of the leading special truck manufacturers and exporters in China since 1997.

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