The hydraulic system of the hydraulic long floor jack

Hydraulic long floor jacks are indispensable tools in the automotive industry, providing a reliable and efficient means of lifting heavy vehicles for maintenance and repair. At the heart of these jacks lies a sophisticated hydraulic system that harnesses the power of fluid mechanics to generate the force required for lifting substantial loads.

1.Components of the Hydraulic System:

The hydraulic system in a long floor jack comprises several key components working in harmony to facilitate the lifting process. These components include:

Hydraulic Fluid:

At the core of the hydraulic system is the hydraulic fluid, often oil-based, which serves as the medium for transmitting force. This fluid is contained within a reservoir and is crucial for the overall functionality of the jack.

Pumping Mechanism:

The pumping mechanism is responsible for pressurizing the hydraulic fluid. Typically operated by a handle, this mechanism converts manual input into hydraulic pressure. As the handle is pumped, it activates a piston within the pump, creating pressure that is transmitted to the hydraulic fluid.

Hydraulic Cylinder:

The hydraulic cylinder is a crucial component that converts the pressure generated by the pumping mechanism into linear force. It consists of a cylindrical barrel containing a piston connected to a lifting arm. When pressure is applied, the piston moves within the cylinder, exerting force on the lifting arm and causing it to rise.

Release Valve:

To lower the lifted load gently and safely, a release valve is incorporated into the hydraulic system. This valve controls the flow of hydraulic fluid, allowing for a controlled descent of the lifting arm when the jack needs to be lowered.

Reservoir:

The reservoir serves as a storage space for the hydraulic fluid. It ensures a consistent and adequate supply of fluid to the hydraulic system, preventing air from entering the system, which could compromise its efficiency.

2. Working Principles of the Hydraulic System:

Pressure Generation:

As the operator pumps the handle of the jack, the pumping mechanism pressurizes the hydraulic fluid within the system. This increase in pressure is uniform throughout the fluid, in line with Pascal's law.

Hydraulic Cylinder Activation:

The pressurized hydraulic fluid is then directed to the hydraulic cylinder. The hydraulic cylinder consists of a piston connected to the lifting arm. The pressure acts on the piston, inducing movement within the cylinder. As the piston moves, it imparts force to the lifting arm, causing it to rise.

Load Lifting:

The force generated by the hydraulic system is harnessed to lift heavy loads. The lifting arm, connected to the piston within the hydraulic cylinder, provides the mechanical advantage needed to raise the vehicle, overcoming the effects of gravity.

Controlled Descent:

When the operator desires to lower the lifted load, the release valve comes into play. By adjusting the release valve, the flow of hydraulic fluid is controlled, allowing for a gradual descent of the lifting arm. This controlled descent is crucial for ensuring the safety of both the vehicle and the operator.

3. Advantages of Hydraulic Systems in Long Floor Jacks:

High Lifting Capacity:

Hydraulic systems are known for their ability to generate substantial force, enabling long floor jacks to have high lifting capacities. This is particularly advantageous when dealing with heavy vehicles, such as trucks and SUVs, where a robust lifting mechanism is essential.

Smooth and Controlled Operation:

The hydraulic system allows for a smooth and controlled lifting and lowering process. The operator can precisely control the elevation and descent of the lifting arm, ensuring a gradual and safe operation.

Ease of Use:

Hydraulic long floor jacks are designed with user-friendliness in mind. The manual pumping mechanism is straightforward, and the controlled descent feature enhances the overall ease of use, making them accessible to both professionals and DIY automotive enthusiasts.