Hydraulic cylinder of dual joined bodies

Abstract

The invention discloses a double-connected hydraulic cylinder. The first oil cylinder is on the left side of the second oil cylinder. The dynamic seal of the piston rod passes through the end faces of the first and second oil cylinders and its two ends are respectively located 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 two ends of the second piston rod are respectively connected to the second The right side of the first piston and the left side of the second piston, one end of the third piston rod is connected to the right side of the second piston, the hydraulic control check valve DV4 is connected to both sides of the second oil cylinder, and the left side of the second oil cylinder is connected with the hydraulic control valve PV2. The hydraulic pump is connected, and the right side of the second oil cylinder communicates with the oil tank through the hydraulic control valve PV3; the first oil cylinder is connected with the oil outlet of the electromagnetic reversing valve, and the oil inlet of the electromagnetic reversing valve is respectively connected with the hydraulic pump and the oil tank. LS1 is set at the initial position of the other end of the third piston rod, and the travel switch LS2 is set at the end position of the other end of the third piston rod. The cost is low, and it can generate large and stable thrust.

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, 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 oil cylinder is connected to the second oil cylinder On the left side, first and second pistons 21 and 22 are respectively arranged in the first and second oil cylinders, 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 the first, second and third piston rods are equal in diameter. One end of the three piston rods is respectively set in the first and second oil cylinders, the second piston rod is dynamically sealed through the end faces of the first and second oil cylinders and its two ends are respectively placed in the first and second oil cylinders, and one end of the fi...

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, 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 oil cylinder is connected to the second oil cylinder On the left side, first and second pistons 21 and 22 are respectively arranged in the first and second oil cylinders, 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 the first, second and third piston rods are equal in diameter. One end of the three piston rods is respectively set in the first and second oil cylinders, the second piston rod is dynamically sealed through the end faces of the first and second oil cylinders and its two ends are respectively placed in the first and second oil cylinders, and one end of the fi...

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