Principle and structure of two post lift

The lifting machine is a kind of lifting equipment commonly used in automobile repair and maintenance units, which is a maintenance equipment that lifts various automobiles to a certain height for automobile maintenance and safety inspection operations. 

Now the lift products from the form of drive can be divided into mechanical, hydraulic, pneumatic three categories, of which, the current hydraulic, mechanical, pneumatic least. The hydraulic pressure is characterized by smooth, less noise and large strength; The disadvantage is that it is easy to leak oil and pollute the environment after a long time. From the appearance can be divided into: two-column, four-column and shear type;

Two post lifting machine working principle

When rising, the motor drives the gear pump through the control valve in the hydraulic station, the hydraulic oil is input by the high-pressure hose into the cylinder in the column, under the action of oil pressure, the cylinder piston rod is pushed out, through the chain (or directly by the cylinder piston rod) to drive the slide frame to rise, and the bracket arm of the slide frame to support the car, so that the car rises with the slide frame to complete the lifting work. 

When falling, open the return oil line, under the action of the working slide weight and load, the piston rod is pressed back to the cylinder through the chain (or directly by the cylinder piston rod), the working slide is lowered, and the hydraulic oil is discharged back to the tank to complete the falling work.

Hydraulic principle of two post lift

Lift up: 

Press the rise button to start the motor, the motor drives the gear pump to work, the hydraulic oil filters through the oil filter, enters the gear pump to form a certain pressure, enters the cylinder through the check valve, drives the cylinder piston rod to rise, so that the lift machine rises. When the motor stops, the gear oil pump stops working, and the lift stops at the height being lifted. At this time, there are check valves and manual unloading valves to maintain pressure. 

Lift down: 

If you want to make the lift down, just press the handle of the manual unloading valve to press down (or press the drop button of the electric box) to open the return oil circuit; Release the handle (or release the power box drop button) to stop the drop. The descent stops when the speed is clear. The descending speed can be achieved by adjusting the throttle valve. The inward spin slows down, the outward spin speeds up. But do not turn inside dead, because the oil return circuit is closed.

The main components of the two post lift

1. Column: two 

2. Cover plate (gantry beam) : one piece 

3. Power unit: one set 

4. Electronic control system: one set 

5. Slide frame: two sets 

6. Bracket arms: four 

7. Oil cylinder: two sets 

8. Guide wheel: six 

9. Safety device: two 

10. Wire rope: two 

11. Chain: Two

Safety device;

1. Overload protection of hydraulic system 

2. The hydraulic system is installed with the relief valve. By adjusting the pressure of the relief valve spring, the maximum pressure of the hydraulic system can be set. When the system reaches the highest pressure, the relief valve automatically depresses and returns the oil. 

3. Oil pipe explosion-proof valve The role of the explosion-proof valve is: when the oil pipe is accidentally damaged, by limiting the oil return flow, limit the sliding frame decline speed, to prevent the occurrence of vehicle rollover.

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