Pressure cylinder and lifting table with the pressure cylinder

Abstract

The invention relates to a pressure cylinder and a lifting platform with the pressure cylinder. The lifting platform includes a table top and a lifting support device arranged under the table top. The power mechanism in the lifting support device uses the pressure cylinder of the present invention. The pressure cylinder includes a cylinder body, a piston and a piston rod, and the piston divides the cylinder body into a first chamber. and the second chamber, the piston rod is connected to the piston and protrudes from the first chamber, the first chamber and the second chamber are in fluid communication, in the first region in the axial direction of the cylinder, the inner diameter of the cylinder is from The direction from the second chamber to the first chamber gradually increases, and in the second region in the axial direction of the cylinder, the inner diameter of the cylinder remains constant in the direction from the second chamber to the first chamber. The second area is located above the first area and directly connected with the first area, so that the output force remains stable when the piston rod is stretched out from the cylinder. The lifting platform can be equipped with a synchronous lifting device and an energy conversion device, so that the lifting platform can achieve stable lifting under different loads.

Description

technical field [0001] The invention relates to the field of mechanical transmission, and first proposes a piston-type pressure cylinder, the piston rod of which can provide stable output force during reciprocating motion. Furthermore, this general-purpose pressure cylinder is used in the field of furniture or production equipment, and a liftable workbench is proposed. The workbench can be represented as a table, a chair, an operating table or a display table, etc., and is suitable for home furniture, Office furniture, teaching desks and chairs, work tables for production, etc. Background technique [0002] At present, the realization methods of manual lifting table on the market mainly include: [0003] 1. After adjusting the height of the desktop through the preset jacks on the table legs, fix it directly with bolts. Its structure is simple, but there are only a few segmented gears, which makes the operation difficult and consumes physical strength; [0004] 2. Change th...

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Problems solved by technology

[0003] 1. After adjusting the height of the desktop through the preset jacks on the table legs, fix it directly with bolts. Its structure is simple, but there are only a few segmented gears, which makes the operation difficult and consumes physical strength;

[0004] 2. Change the angle of the corresponding support structure through the lever mechanism to achieve the purpose of changing the height of the desktop, but the operation is complicated and dangerous, and accidents are prone to occur when the components change the angle;

[0005] 3. Directly use the labor-saving principle of worm gear and worm, use the handle to rotate the worm, and the worm gear drives the mechanism to adjust the height of the desktop, but the adjustment speed is slow, the noise is loud, and it consumes physical strength;

[0006] 4. Use the tension spring as the power, transmit the power through the pulley block connected with the tension spring, and pull the rope on the pulley block to adjust the height of the table. Although this kind of scheme can realize the stepless adjustment of the table height, the rope is easily damaged due to frequent bending. The closed installation will easily lead to corrosion of the rope if it is in disrepair for a long time. Once the rope is broken, it will be extremely dangerous and destructive. In addition, as the only auxiliary power source, the spring bears a large load and is prone to fracture damage after long-term use;

[0007] 5. Use a telescopic cylinder piston rod to drive the table legs up and down, and use an ordinary cylinder to increase the output force during the lifting process. The disadvantage is that as the piston stroke increases, the output force stability of the cylinder will become smaller and smaller, making the tabletop in During the lifting process, the force used by the operator is unbalanced, and the lifting process of the desktop is not stable.

[0011] First, it is laborious to change the height of the table top, and it cannot guarantee that the operator exerts force evenly during the lifting process, and the lifting process of the table top is not stable;

[0012] Second, using the spring as the only auxiliary power source, the spring bears a large load, is easy to break, and is very destructive;

[0013] Third, for the lift table with synchronous lifting structure, the connection relationship between the synchronous lifting structure at the beam under the desktop panel and the lifting table legs on both sides is complicated, and its connection and assembly must be completed before leaving the factory. The table legs of the finished lifting table It is inconvenient to disassemble, resulting in bulky finished products, high storage costs, and high logistics costs

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