Core tips: Car crane overall structure and maintenance of the new standard car crane generally reformed by two types of chassis, in addition to the chassis, the car crane also includes the force part, lifting control room, lifting device, rotary device, support device, electrical equipment and hydraulic pressure.
The new standard for the overall structure and maintenance of the truck crane
The truck crane is usually modified by two types of chassis. Besides the chassis, the truck crane also includes the force part, the lifting control room, the lifting device, the rotary device, the support device, the electrical equipment and the hydraulic system.
The power take-off part is used to transmit the power of the engine to the lifting device and the rotary device, mainly including a power take-off device and a control mechanism thereof. Power is usually output from a transmission or a distributor.
The lifting control room is located on the turntable, which is convenient for the driver to carry out lifting operation and improve its working conditions. Various control devices and indicating devices are arranged inside the control room.
The lifting device is the working device of the truck crane, which is used to complete the lifting and landing operation of the goods, mainly including the extraction device (such as hook, grab bucket, etc.), the lifting mechanism (wire rope, pulley group, lifting winch, etc.), the lifting arm and its amplitude variable mechanism and telescopic mechanism, which are located on the turntable and can be rotated with the turntable.
The rotary device is used to complete the rotation of the goods, including the turntable (with the lifting arm, the lifting hinges and the lifting control room, etc.), the rotary mechanism and its driving device.
The support device is used to ensure that the load is passed to the supporting surface rigidly in the lifting operation, reducing the load of the vehicle suspension, axle and tire, and increasing the stability of the car. It includes leg and its accessory.
Electrical equipment includes lighting, signal and control room acoustics, fans, indicating devices and so on.
The hydraulic system realizes the control of various devices by means of engine power, and consists of hydraulic pumps, control valves, overflow valves, hydraulic cylinders and pipelines.
Turntable, lifting arm, telescopic mechanism, rotary mechanism, lifting mechanism, amplitude variable mechanism, control room and control mechanism, safety device and so on can be used as the part of rotary motion, also known as the upper part of the truck, which is the main working device of the crane. Vehicle chassis, sub frame and outrigger, force take-off device, alighting control mechanism, also known as the car part. The two parts of the vehicle and the car are connected by the slewing bearing and the central rotary joint.
It is learned that the Ministry of industry and information technology issued the following 3 new standards at the end of last year and will be implemented in July 1st this year. "JB/T4030.1-2013 truck crane maintenance and tire crane maintenance test standard first part: operation reliability test" stipulates the test prototype and test condition, test method, test conclusion, fault classification and test report for the reliability test of truck crane and tyre crane. It is suitable for truck crane and wheel. Tire crane, instead of JB/T4030.1-2000, was released by the Ministry of industry and information technology in People's Republic of China at the end of 2013 and implemented in July 1, 2014. "Test specification for JB/T4030.2-2013 truck crane and tyre crane second part: driving reliability test" stipulates the test condition, test prototype, test method, test conclusion and test report of the vehicle crane and tire crane and truck crane chassis. It is suitable for truck cranes and tires. Crane (general or off-road) and truck crane special chassis, instead of JB/T4030.2-2000. "Test specification for JB/T4030.3-2013 truck crane and tyre crane third parts: hydraulic system test" stipulates the test requirements, test items, test conditions, test methods, efficiency calculation and test report of the lifting hydraulic circuit for the hydraulic system test of the truck crane and tyre crane, which is suitable for the hydraulic motor vehicle. Heavy machinery and tire crane replace JB/T4030.3-2000.
