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design of mechanically operated bottle jack pdf

Jack is a mechanical device used as a hoist for lifting heavy loads or apply great forces. mechanical Jack use a screw thread for lifting heavy equipment. the most common form is Jack, floor Jack or garage Jack which lifts vehicles so that maintenance can be performed. Mechanical jacks are usually designed for maximum load capacity (for example, 1.5 tons or 3 tons). More powerful jacks use hydraulic power to provide more lift at great distances and can be evaluated for many tons of cargo.
screw jack
car

Car Scissor jacks usually use mechanical advantage to allow the man to raise the vehicle using hand force. Jack shown at right is made for modern car and notch fits into a hard point on the whole. Earlier versions have a platform for lifting the frame or under the axle of the car.
Electrically operated scissor car Jack work on 12 volts of electricity, fed directly from the car cigarette lighter receptacle electrical energy is used to power these nests for lifting and lowering the car automatically. Electric jacks, require less effort from the motorist to work.
House Jack
Home plug, also called a screw jack is a mechanical device used for lifting the building from its funds for repairs or relocation of a number of nests is used, then wood cribbing temporarily supports the structure. This process is repeated until the desired height is reached, the House Jack can be used to tension bearing beams, which have settled or installing new beams. At the top of the connector is round cast iron liner that lifting after relies on. This pad moves independently from the nest so that it is not included in the Acme-threaded rod is rotated with a metal rod. This piece leans a little bit, but not enough to make a post is dangerous, not vertically.

hydraulic jack

Hydraulic jacks normally used to work and not as an emergency Jack be carried out with the car. The use of sockets that are not intended for a specific vehicle requires more than the usual treatment in choice of ground conditions, with the point of attachment to the vehicle, as well as ensure stability when the nest is expanding. Hydraulic jacks used to lift elevators in small and medium-sized high buildings.

Hydraulic jack uses a liquid which is incompressible, that is forced into the cylinder with the piston pump. The oil is used because it is grease and stable. When the plunger pulls back, draws oil from the tank through the suction check valve in the pump Chamber. When the piston moves forward, it pushes oil through the exhaust valve per cylinder ball valve in the suction Chamber and opens with each drawing of the piston. The ball valve is off-camera, and opens when the oil is pushed into the cylinder. At this point the suction ball within the Chamber and forced to shut down, oil pressure in the cylinder.

Floor Jack (the so-called "Trolley Jack") Horizontal piston pushes at the short end of the rocker, with a long arm, allowing vertical motion to lift spacers, horizontal, horizontal communication is stored. The nest Floor usually include wheels and castors, allowing compensation for the arc of recovery Panel. This mechanism provides a low profile when collapsed for easy maneuvering under the car, while allowing a significant expansion.

Bottle Jack
Bottle Jack or Whiskey Jack is Jack, which resembles a bottle in the shape of a cylindrical body and neck from which a hydraulic plunger rotation. In the bottle piston vertically and directly supports the anchor pad that contacts the object being lifted up. With single piston action of the elevator is somewhat less than twice collapsed height of the nest, making it suitable only for vehicles with relatively high ground clearance. For your winding structures such as houses of hydraulic interrelation of several vertical slots through the valves allows even distribution of forces, while ensuring strict control of the lift.

They are available in capacities up to 50 tons, and can be used for various objects. Typical applications include car repairs and House Foundation. Large, heavy models may be known as the Jack shaft.

This type of connector is only used for short vertical lifts. Blocks can be used to repeat the operation when the more height you want.