Hydraulic cylinder of dual joined bodies

Abstract

A hydraulic cylinder with double connected bodies consists of the first cylinder with diameter being less than diameter of the second cylinder, the first and the third piston rod with their one end being set in the first and the second cylinders, the second piston rod with its two ends being separately set in two said cylinders, liquid control one-way valve DV4 connected to the second cylinder, liquid control valve PV2 connected to hydraulic pump, liquid control valve PV3 connected to oil tank, solenoid change valve connected to the first cylinder, stroke switch LS1 and LS2 connected to the third piston rod.

Description

technical field

[0001] The invention relates to a hydraulic cylinder device. Background technique

[0002] If the hydraulic system is required to be large in output and fast in speed. Then the oil cylinder must be large, the pressure must be high, and the flow rate must be large, so that the entire hydraulic system is huge and costly, which is unbearable for users;

[0003] Conventional solution 1: Negative pressure oil filling type, using the self-weight of the slider to absorb oil under negative pressure. The flow rate of the oil pump can be reduced and the cost can be reduced.

[0004] Disadvantages: A, it must be installed vertically, otherwise auxiliary devices need to be installed;

[0005] B, the slider needs a certain weight;

[0006] C, build pressure slowly.

[0007] Conventional solution 2: Elbow expansion type, using the elbow expansion to exert force at the mechanical dead point. The diameter of the oil cylinder can be reduced, the flow rate of the oil pum...

Examples

Embodiment

[0021] Example: see figure 1 , a double conjoined hydraulic cylinder, comprising first and second oil cylinders 11 and 12, the bore diameter of the first oil cylinder is smaller than the bore diameter of the second oil cylinder, the first oil cylinder and the second oil cylinder are fixedly connected, and the first and second oil cylinders are respectively arranged There are first and second pistons 21, 22, the strokes of the first and second oil cylinders are equal, the diameters of the first, second and third piston rods 31, 32 and 33 are equal, and one end of the first and third piston rods is respectively located on the first and third piston rods. In the second oil cylinder, the dynamic seal of the second piston rod passes through the end faces of the first and second oil cylinders and its two ends are respectively in the first and second oil cylinders. One end of the first piston rod is connected to the left side of the first piston, and the second piston rod The two end...

technical field

[0001] The invention relates to a hydraulic cylinder device. Background technique

[0002] If the hydraulic system is required to be large in output and fast in speed. Then the oil cylinder must be large, the pressure must be high, and the flow rate must be large, so that the entire hydraulic system is huge and costly, which is unbearable for users;

[0003] Conventional solution 1: Negative pressure oil filling type, using the self-weight of the slider to absorb oil under negative pressure. The flow rate of the oil pump can be reduced and the cost can be reduced.

[0004] Disadvantages: A, it must be installed vertically, otherwise auxiliary devices need to be installed;

[0005] B, the slider needs a certain weight;

[0006] C, build pressure slowly.

[0007] Conventional solution 2: Elbow expansion type, using the elbow expansion to exert force at the mechanical dead point. The diameter of the oil cylinder can be reduced, the flow rate of the oil pum...

Examples

Embodiment

[0021] Example: see figure 1 , a double conjoined hydraulic cylinder, comprising first and second oil cylinders 11 and 12, the bore diameter of the first oil cylinder is smaller than the bore diameter of the second oil cylinder, the first oil cylinder and the second oil cylinder are fixedly connected, and the first and second oil cylinders are respectively arranged There are first and second pistons 21, 22, the strokes of the first and second oil cylinders are equal, the diameters of the first, second and third piston rods 31, 32 and 33 are equal, and one end of the first and third piston rods is respectively located on the first and third piston rods. In the second oil cylinder, the dynamic seal of the second piston rod passes through the end faces of the first and second oil cylinders and its two ends are respectively in the first and second oil cylinders. One end of the first piston rod is connected to the left side of the first piston, and the second piston rod The two end...

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