JAC dragging two wreckers> Brief introduction of the structure of Jianghuai dragging two wreckers
First, the main structure and working principle:
          JACJAC light truck wrecker series is based on two types of chassisas a platform derived refitted, has a lift, traction,dragged back and other functions, fully capable for general roadrescue vehicles and the implementation of special automobile distribution. Theoutline of thevehicle isas follows:
1ã€Power take-off device
      The force-taking device consists of a power take-off device, an oil pump, and operation buttons. The power take-offdevice is connected with the automotive gearbox and drives the oil pump to generate high pressure oil for the workingconditions ofeach workingpart.
2ã€Subframe
      The sub-frame is a box-like structure, low alloy steel plate of high strengthtobe welded.The front plate is provided on the telescopic cylinders a bracket on the beam lifting cylinder, put the carriage armlift cylinder holder, the guide boom lift stopper plate by means of two hydraulic liftingcylinder, a rotary shaft and a bearing plate and Chassis connection,with good rigidity and strength, is an important force component.
3, tablet
     Plate consists of two parts consisting of the front and rear plates,theplatesare connectedbya slidingplatebetween theside frame and thesub frame rails together, two flat platesconnected togetherby rotationpin assembly securely connected, the relative motion and flexible; flatbottom plate using the pattern The bottom plate can effectively prevent the towed vehicle fromslipping on it.
4, winch mechanism
     The hoisting mechanism consists of a hoisting machine, a hydraulic motor, a wire rope, and a hook.The hydraulic motor drives the hoist to make the wire rope roll up or pull out.
5, the luffing arm
     Luffing arm welded steel structure, even the lift cylinder bracket arm bracket and the holding arm lift cylinder, the telescopic hydrauliccylinder, andeventelescopic arms. The prop arm lifter canextend and extend theluffing arm and change its working range. The expansion and contraction of the telescopiccylinder can extend or shorten the telescopic arm, adjust the distance between the fork and the towed vehicle tire, and lock the bracket and thetire. Support driving.
6, fork
    The fork is composed of a rotating arm, a telescopic arm of a supporting arm, a supporting beam of an adjusting arm, an adjusting arm, etc., whereinthe relative sliding between therotating armand the telescopic arm of the supporting arm is manual, convenient and flexible, and theadjusting armcan beadjustedthrough relative sliding of the supportingarm. the positional relationship between the lateral support beams, the support arm adjustment arm is adjusted relative movement between the beamsis also manually, by a relative movement therebetween, can adjust the vertical positionalrelationshipbetween the tire and the actuating arm.
7, Toolbox
     The toolbox is an all-metal structure that houses various operating tools and accessories
8, hydraulic system
     The hydraulic system by the hydraulic pump, hydraulic motors, hydraulic cylinders, reversing multiplevalves, hydraulic lines and hydraulic oil tank and other components.
      The power take-off drive hydraulic pump draws low-pressure oil from the tank, pumps out high-pressureoil, and manipulates the handles of the reversing valve to realizevarious working conditions such aswinding, luffing, lifting,platform sliding, and platform tilting. Areliefvalve is attached to the reversingvalve to protect the hydraulic system from overloading. Wherein the platform lift cylinder andlift cylinder of theholdingarm are connected with the lower end of balancing, can effectively preventa shock in the hydraulic cylinder during the downward movement, play Paul pressure.