Know The Mechanism Behind The Lifting Action Of Floor Jack

floor jack

Anyone who has ever used vehicles would have faced situations where a floor jack is utilized as a lifting lever to change the vehicle tires. It can also be utilized for any other repair purpose to be done below the car or other motor vehicles. While buying floor jacks make sure you purchase good quality products like powerzone 380044. The free repair guide, www.ifixit.com provides methods for repairing your vehicle by lifting it up with a floor jack.

Types Of Floor Jacks
Floor jacks are mainly divided into two. They are mechanical floor jacks and hydraulic floor jacks. The mechanical floor jack uses screw mechanism to apply mechanical force on the jack body and lift up the vehicle. The screw has a shorter thread pitch or thread distance. This acts as a mechanical advantage and boosts the lift of heavy loads using only moderate effects. The bargain, in this case, is that the screw should be turned a countless number of times even to achieve a small lift. Usually, these types of floor jacks are the ones found in a vehicle’s roadside assistance kit.

The second type of floor jack is the hydraulic floor jack. It makes use of hydraulic pistons, valves, and multiple levers to get the mechanical power to lift up the vehicle. The handle is placed in such a position that it gives the user a great mechanical benefit right from the beginning of the lifting process. For each quantity of force applied to the handle of the floor jack, a greater force is applied to the hydraulic piston. The system of hydraulic piston contains two cylinders of varying diameters, a large reservoir and many valves to control the flow. The mechanical force from the handle of jack acts on the relatively small hydraulic piston. This force then gets amplified into a greater force as a result of the difference between the hydraulic chamber diameters.

Application Of Pascal’s Law
Pascal’s law is one of the main laws applied in fluid dynamics. The law states that when you apply pressure on the confined and incompressible fluid, the pressure gets transmitted in all the directions equally all over the fluid. The pressure transmission takes place in such a way that pressure variations always remain the same. This law is made use in the hydraulic floor jacks.

According to the law, when a fluid is forced to flow from a smaller chamber to a larger chamber, the pressure remains same in both the small and large chambers. But, the same pressure is distributed over a larger area in the larger cylinder. This greater surface area gives rise to a greater force. Usually, pressure is measured as units of force per area of the surface. It is usually measured in units of pounds per square inches or psi. Hence, in short, the larger square inch of surface area on which pounds are applied, greater will be the force. The floor jack starts to lift up the vehicle; the valves are closed by the twist on jack handles in the right direction.

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