With the vigorous development of China's automobile industry, automobile repair industry also ushered in a huge market demand. Therefore, the auto repair industry is in urgent need of all kinds of efficient and targeted auto repair equipment and tools. In the auto repair industry, the double column hydraulic lift is widely adopted by the repair industry. In recent years, at least two-thirds of all new sales of lifts are of this type. The double column lifting machine adopts two single hydraulic cylinders to drive the chain to drive up, and the steel wire rope realizes the synchronous lifting of double columns. The maximum lifting weight is 4000 kg and the maximum lifting height is 1750 mm, which is in line with the national safety standard of automobile lift. Compact structure, beautiful appearance, is a kind of high efficiency auto repair equipment. The requirements of lift series products produced by Yingkou aolaibangte Automobile warranty equipment Co., Ltd. are as follows:

1. Technical requirements

(1) The maximum lifting weight is 4000 kg.

(2) The maximum lifting height is 1750 mm.

(3) In line with the national safety standard of automobile lift.

(4) The thickness of double column steel plate is 4.75mm (excluding the paint thickness).

(5) The length of inlet cylinder is 915mm（ Free insurance (2 years)

(6) The chain adopts 4 * 4 shield chain.

(7) The hydraulic power unit of the pump station adopts domestic pure copper aluminum shell motor.

2. Features

(1) The lifting machine's two arms rise and fall synchronously.

(2) Lift lift lift within the effective self-locking, to ensure safe use.

(3) Form magnifying mechanism to reach the height required by lifting design.

(4) The supporting arm can rotate flexibly and locate conveniently.

(5) Compact structure and reasonable layout.

3. Technical route

(1) Determine the lifting structure of the car to meet the maximum lifting height.

(2) The lift ensures the safety of equipment and users through three aspects: mechanical self-locking, hydraulic self-locking and electrical self-locking.

(3) The stroke amplification mechanism of pulley and chain is used to realize the stroke amplification of lift. The mechanism is compact in structure and small in volume, and has been widely used in various lifting equipment. The hydraulic cylinder stroke of the lift is 1300mm and the lifting height is 1750mm.

(4) Through the wire rope to achieve lifting arm synchronization.

(5) The types of car lifting are different, so the length of lifting arm also needs a certain range of expansion.

(6) The car adopts hydraulic lifting mode, so the company chooses hydraulic cylinder, hydraulic pump, pipeline and so on, which are all well-known brands in China.

(7) On the premise of meeting the maximum lifting quality, ensure the safety and increase the cost, use the materials reasonably, design the mechanical structure reasonably, select the parts reasonably, and provide the lift series products with high cost performance for the majority of users.