Hydraulic cylinder for self-locking by spring

Abstract

The invention discloses a hydraulic cylinder for self-locking by a spring. The hydraulic cylinder comprises a cylinder barrel, a cylinder bottom, a cylinder cover, a piston and a piston rod; a blind hole is formed in the piston; a buffer device is arranged in the blind hole; a support column is arranged on the cylinder bottom; when the support column is acted on the buffer device, the moving speed of the piston is forced to slow down, so that quick collision between the piston and the cylinder bottom is prevented, and a certain protecting effect is achieved on a hydraulic system; the spring is arranged on the piston rod, and is provided with a locking rod; an oil inlet pipe and a self-locking groove are arranged in the cylinder barrel; when the piston rod moves to a certain position, the locking rod can be clamped into the self-locking groove due to the effect of the spring, and the piston rod is kept still to realize self-locking; and during unlocking, high-pressure oil enters the self-locking groove through the oil inlet pipe, pressure generated by the hydraulic oil can enable the locking rod to shrink back, and the piston rod can move again.

Description

technical field

[0001] The invention relates to a mechanical transmission mechanism, in particular to a hydraulic cylinder which utilizes a spring for self-locking. Background technique

[0002] Hydraulic transmission has many outstanding advantages, so it is widely used, such as plastic processing machinery, pressure machinery, machine tools, etc. for general industrial use; engineering machinery, construction machinery, agricultural machinery, automobiles, etc. in walking machinery; Metallurgical machinery, hoisting devices, roll adjustment devices, etc.; flood control gates and dam devices, river bed lifting devices, bridge control mechanisms, etc. for civil and water conservancy projects; turbine speed control devices for power plants, nuclear power plants, etc.; deck lifting machinery for ships (Winch), bow door, bulkhead valve, stern propeller, etc.; giant antenna control device for special technology, measuring buoy, lifting and rotating stage, etc.; artillery control...

Examples

Embodiment

[0020] like figure 1 As shown, the present invention utilizes spring to carry out self-locking hydraulic cylinder, comprises cylinder bottom 1, piston 4, cylinder barrel 6, cylinder head 10 and piston rod 11, and described cylinder barrel 6 is welded with cylinder bottom 1, and cylinder head 10 connects piston 4 is sealed inside the cylinder 6, the piston 4 can move inside the cylinder 6, and the first sealing ring 3 is arranged between the piston 4 and the cylinder 6, the first sealing ring 3 is a rectangular sealing ring, and the rectangular sealing ring The contact pressure is uniform, the sealing area is large, and the sealing effect is good. The piston 4 is also provided with a blind hole, and a buffer device 14 is arranged in the blind hole. The buffer device 14 is composed of a buffer spring and a buffer plate. One end of the buffer spring is connected to the piston 4. , the other end is connected with the buffer plate, a rodless cavity 16 is provided between the piston...

technical field

[0001] The invention relates to a mechanical transmission mechanism, in particular to a hydraulic cylinder which utilizes a spring for self-locking. Background technique

[0002] Hydraulic transmission has many outstanding advantages, so it is widely used, such as plastic processing machinery, pressure machinery, machine tools, etc. for general industrial use; engineering machinery, construction machinery, agricultural machinery, automobiles, etc. in walking machinery; Metallurgical machinery, hoisting devices, roll adjustment devices, etc.; flood control gates and dam devices, river bed lifting devices, bridge control mechanisms, etc. for civil and water conservancy projects; turbine speed control devices for power plants, nuclear power plants, etc.; deck lifting machinery for ships (Winch), bow door, bulkhead valve, stern propeller, etc.; giant antenna control device for special technology, measuring buoy, lifting and rotating stage, etc.; artillery control...

Examples

Embodiment

[0020] like figure 1 As shown, the present invention utilizes spring to carry out self-locking hydraulic cylinder, comprises cylinder bottom 1, piston 4, cylinder barrel 6, cylinder head 10 and piston rod 11, and described cylinder barrel 6 is welded with cylinder bottom 1, and cylinder head 10 connects piston 4 is sealed inside the cylinder 6, the piston 4 can move inside the cylinder 6, and the first sealing ring 3 is arranged between the piston 4 and the cylinder 6, the first sealing ring 3 is a rectangular sealing ring, and the rectangular sealing ring The contact pressure is uniform, the sealing area is large, and the sealing effect is good. The piston 4 is also provided with a blind hole, and a buffer device 14 is arranged in the blind hole. The buffer device 14 is composed of a buffer spring and a buffer plate. One end of the buffer spring is connected to the piston 4. , the other end is connected with the buffer plate, a rodless cavity 16 is provided between the piston...

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