A built-in booster cylinder with anti-rotation and return functions

Abstract

The invention discloses a built-in pressure oil cylinder with rotation prevention and stroke return functions. The oil cylinder comprises a cylinder barrel component, a built-in piston rod, a first stroke return plunger, a second stroke return plunger and a displacement sensor, wherein the cylinder barrel component comprises a low-pressure flange, a middle flange, a high-pressure flange, a low-pressure cylinder barrel, a high-pressure cylinder barrel and stay bolts; the built-in piston rod comprises a piston head and a rod body; one end of the first stroke return plunger extends into a first stroke return cavity; the other end of the first stroke return plunger is fixed on the low-pressure flange; one end of the second stroke return plunger extends into a second stroke return cavity; the other end of the second stroke return plunger is fixed on the high-pressure flange; and the displacement sensor is arranged between the built-in piston rod and the low-pressure flange. With the adoption of the structure, the oil cylinder has the rotation prevention and stroke return functions, so that the processing complexity and the processing cost are reduced, and the service life is prolonged; and due to structural improvement, the displacement sensor can be mounted on the piston rod, so that the control accuracy is improved.

Description

technical field [0001] The invention relates to a pressurized oil cylinder, in particular to a built-in pressurized oil cylinder with functions of anti-rotation and return stroke. Set in the field of hydraulic equipment. Background technique [0002] The pressurized oil cylinder with return function used in the existing hydraulic component field adopts a composite oil cylinder, which includes a cylinder barrel 91, a first flange 92, a second flange 93, tie rod bolts 6, an exposed piston rod 94, and a return cylinder 95 and the return piston rod 96, wherein the center of the built-in piston end of the exposed piston rod is processed into a return cylinder structure, the rodless cavity in the cylinder is a low pressure cavity, the rod cavity is a high pressure cavity, and the first flange 92 is provided with a low pressure port 97. The second flange 93 is provided with a high-pressure port 98. The pressurized oil cylinder of this structure has the following problems (see Fi...

AI Technical Summary

Problems solved by technology

Not only is there leakage due to seal failure, but even a slight leakage will accumulate due to long-term work, resulting in waste of resources, environmental pollution, and impact on aesthetics, etc.

[0004] 2) When the existing pressurized oil cylinder is working, the exposed piston rod is protruding outwards, and the exposed piston rod is easily affected by the external environment to cause corrosion, and it is also easy to pull and scratch

In order to prevent rust and wear resistance, the surface of the exposed piston rod must be treated with hard chrome plating, which increases the cost

[0005] 3) The exposed piston rod of the existing pressurized oil cylinder is not constrained in the circumferential direction when it is working, and it will rotate during operation, which will distort the seal and affect the service life of the seal

Therefore, the processing cost is high

[0007] 5) The built-in displacement sensor cannot be installed, because the center position of the exposed piston rod has been occupied by the return cylinder

Because the exposed piston rod will rotate, the built-in displacement sensor cannot be installed on the off-center position of the piston

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