The working principle of the truck crane is as follows:
1. Principle:
• When the truck is suspended from work, the power transmitted by the engine is used to transmit power to the drive hydraulic pump through the power takeoff pump to provide high pressure oil to the hydraulic system, and then to operate the manual rotary valve, manual reversing rotary valve, and multiple commutation The valve distributes the oil to each working assembly to complete the control of the crane so that the goods can be lifted, swung and lifted.
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2, the structure principle:
• 2.1 boom
The truck crane is a hexagonal, hexagonal, box-shaped box structure with a steel structure. Its role is mainly used to support the load and change the radius of the crane operation. It consists of basic arms, telescopic arms at various levels, telescopic cylinders, and so on. Dongfeng truck crane arm movement in a certain order, extending the first two arm extension after the first three arm and the top section of the arm, retraction is the opposite; sequential action by the sequence valve control.
• 2.2 hoisting mechanism
• Mainly consists of a winding motor, gearbox and reel. It is mounted on a column and driven by a plunger motor to drive the reel. In order to achieve heavy lifting, down and stop arbitrarily.
• 2.3 Luffing cylinder
• Luffing cylinders mainly consist of cylinders, piston rods, pistons, end caps and seals. The principle is to use the liquid flow to complete the expansion and contraction of the cylinder. Its role is to adjust the boom angle.
• 2.4 Rotary Mechanism
• The slewing gear consists of a rotary gearbox and a hydraulic motor. The principle is to use hydraulic power to drive the hydraulic motor to rotate, and drive the worm and worm wheel of the rotary speed reducer to rotate. Its role is to drive the upper column of the crane and the boom to turn around the center of rotation.
• 2.5 Outrigger Mechanism
• Legs are divided into front legs and back legs. The front leg mechanism is composed of a leg frame, a leg frame telescopic cylinder, and a leg cylinder. The back leg mechanism is composed of a bracket and a leg cylinder. The principle is to use the liquid flow to complete the expansion and contraction of the cylinder. The role is to stabilize and support the lifting operations and reduce the load on the chassis car beams.
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• 3, technical characteristics
• 3.1: Torque = Force X The arm is the product of the lifting weight and the working radius. It is the lifting capacity of the crane. The torque of each size crane is fixed, and the larger the working radius, the smaller the lifting capacity. The smaller the working radius, the greater the lifting capacity.
• 3.2: Working radius: The working radius refers to the horizontal distance from the center of the column to the center of the hook. The maximum working radius is the length from the center of the column to the hook when the boom is horizontal.
• 3.3: Lift height: Lift height refers to the vertical height of the hook to the ground. The maximum lifting height is the vertical distance from the center of the hook to the ground when the maximum elevation angle of the boom and the maximum arm extension. The lifting height is the actual height of the cargo lifting, not the vertical height from the ground to the top of the boom. Professional sales of Dongfeng Futian and major brands with truck crane, truck crane truck. Http://
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• 4: Leg Span: The leg span is the horizontal distance between the center of the two legs when the horizontal cylinder is fully extended.
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5: Rotation angle: The rotation angle refers to the working range of crane rotation.
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6: Luffing range: Luffing range refers to the range of the minimum angle to the maximum angle between the boom and the ground when the cylinder changes from full shrinkage to full lift.
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7: Number of boom sections: The number of boom sections refers to the number of crane telescopic arms and fixed arms. For example, the SQ8SA3 means an 8-ton, four-section, straight-arm truck crane consisting of a fixed arm and a three-section telescopic arm.
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8: total mass = service quality + rated load quality, service quality = service quality of the chassis + weight of the crane. The rated load quality refers to the weight of the goods contained in the announcement, and the larger the rated load, the more goods that are allowed to be loaded. The rigging quality of the truck mounted chassis is its own weight. To learn more about truck crane information and purchase truck cranes, please call: 15271353555
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