The working principle of manual hydraulic forklift (DiNiu) is based on the principle of hydraulic transmission. It uses oil as the working medium, transmits motion through changes in sealing volume, and transmits power through the internal pressure of the oil to achieve the lifting and handling of goods. The core principles and workflow are as follows:

1、 Core Principles: Hydraulic Transmission and Pascal's Law

Fundamentals of Hydraulic Transmission

Manual hydraulic forklifts use oil as the medium, transmit motion through the volume change of the sealing system, and use oil pressure to transmit power. This process is similar to a "liquid relay race":

Motion transmission: For example, a syringe sucks and pushes liquid, and motion transmission is achieved by changing the sealing volume.

Power transmission: The internal pressure of the oil precisely transfers energy from one location to another, converting human labor into lifting force.

Application of Pascal's Law

According to Pascal's law, the pressure at any point in a sealed liquid can be equally transmitted in all directions. A manual forklift applies pressure to the oil through a small piston (handle operation end), and the pressure is transmitted to the large piston (hydraulic cylinder end) through the liquid, generating an amplified lifting force and achieving a "small for big" lifting effect.

2、 Workflow: Collaborative operation of four major parts

Power section: Hydraulic pump (energy conversion)

Structure: Typically, manual plunger pumps or gear pumps are used.

Operation: The operator shakes the handle up and down to drive the plunger or gear inside the pump to operate, converting mechanical energy into hydraulic energy (hydraulic pressure).

Analogy: Similar to riding a bicycle, stepping on the pedals transfers the mechanical energy of the legs to the chain and wheels.

Execution section: Hydraulic cylinder (action implementation)

Structure: Composed of cylinder barrel, piston, and sealing components.

Function: After high-pressure oil is injected into the hydraulic cylinder, it drives the piston to move in a straight line, converting hydraulic energy into mechanical energy. The piston is connected to the fork to lift and lower the cargo according to its movement.

Analogy: Similar to the elevator car moving up and down with the operation of the system.

Control section: Valve system (precise control)

Pressure control valve: regulates the working pressure of the system to prevent overload.

Flow control valve: controls the flow of oil and adjusts the lifting speed of the fork.

Directional control valve: determines the direction of oil flow, controls the fork to rise, fall, or stop.

Analogy: Similar to a traffic command system, the flow and speed of vehicles are regulated through signal lights.

Auxiliary part: Pipeline and fuel tank (system support)

Pipeline: Transport hydraulic oil to various components, similar to human blood vessels.

Oil tank: stores hydraulic oil and provides energy reserve.

Filter: Remove oil impurities to prevent component wear.

Seals: Ensure system sealing and prevent oil leakage.

3、 Operation example: The entire process of cargo handling

Insert fork: Fully insert the fork under the cargo tray to ensure a stable center of gravity.

Lifting goods: Shake the handle up and down, the hydraulic pump generates high-pressure oil, pushing the hydraulic cylinder piston up, and the fork and goods are lifted together.

Moving goods: Push the forklift to the destination, and the wheels will convert sliding friction into rolling friction, greatly reducing resistance and allowing even heavy objects to move easily.

Landing cargo: Operate the directional control valve to allow the oil to flow back to the tank, slowly lower the fork, and smoothly land the cargo.

Pull out the forklift: After completing the handling, pull out the fork and prepare for the next operation.

4、 Advantages and features: compact and efficient, strong adaptability

Simple structure: no complex electronic components, low maintenance cost.

Flexible operation: The minimum turning radius is only 1.2 meters, which can adapt to narrow passages 2.3 meters wide.

Strong load capacity: Common models can carry 1-5 tons, meeting most storage needs.

Low cost: The price is only 1/5-1/10 of an electric forklift, with high cost-effectiveness.

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