A hydraulic chain hoist is a lifting equipment that uses hydraulic transmission to drive the chain up and down. Its working principle combines the power transmission of the hydraulic system with the mechanical principle of chain transmission. The following is a detailed analysis of its core operating mechanism:

1、 Core Structure and Hydraulic Principles

hydraulic power supply

The hydraulic system consists of hydraulic pumps, hydraulic motors, control valves, and oil tanks. The hydraulic pump converts mechanical energy (such as motor-driven) into hydraulic energy, and drives the hydraulic motor to rotate through high-pressure oil.

Torque amplification device

The hydraulic motor is connected to the chain wheel through a planetary reducer. The planetary reducer amplifies the output torque of the hydraulic motor by meshing multiple sets of gears, thereby driving the chain wheel to rotate.

Chain drive system

The chain wheel is connected by a closed-loop chain, and a hook or load bracket is fixed on the chain. When the chain wheel rotates, the chain drives the load to rise or fall.

Braking and safety devices

The hydraulic chain hoist is equipped with a hydraulic brake, which achieves braking by controlling the oil pressure. When stopping the operation, the brake clamps the chain wheel to prevent the load from accidentally falling.

2、 Workflow and advantages

Lifting process

The hydraulic pump starts, and the oil enters the hydraulic motor through the control valve, driving the chain wheel to rotate.

The planetary reducer amplifies the torque, and the chain pulls the load up.

The descent process

The control valve switches the oil flow direction, and the hydraulic motor rotates in the opposite direction.

The load descends under the action of gravity, and the hydraulic brake controls the descent speed.

Technical advantages

High torque output: suitable for heavy-duty scenarios (such as 5-50 tons).

Infinite speed regulation: achieve smooth rise and fall by controlling the oil flow rate.

Compact structure: suitable for space limited or underwater operations (such as submarine rescue).

3、 Typical application scenarios

Underwater operations

The hydraulic chain hoist can be designed as an underwater specialized model, used in marine engineering, ship maintenance and other scenarios, with a depth of up to 30 meters.

construction site

Used for hoisting building materials and equipment installation, replacing traditional electric hoists to avoid sparks causing danger.

Mines and tunnels

In flammable and explosive environments, hydraulic transmission has no spark risk and higher safety.

4、 Operating standards and maintenance

Load limit

Overloading is strictly prohibited, and the rated load (such as 5-50 tons) needs to be regularly verified.

Environmental adaptation

Underwater models require regular cleaning of the chain to prevent corrosion from seawater.

High temperature resistant hydraulic oil should be selected for high-temperature environments.

maintenance inspection

Daily check for oil leaks, chain wear, and brake flexibility.

Regularly replace hydraulic oil and filter element to avoid oil circuit blockage.

5、 Technological Evolution and Innovation

intelligent control

Integrate overload protection and remote control functions to enhance operational safety.

Material upgrade

Adopting titanium alloy chains and corrosion-resistant shells, suitable for marine and chemical environments.

Modular design

Support quick replacement of vulnerable parts such as hydraulic motors and brakes to reduce maintenance costs.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment