Double-stroke and double-thrust hydraulic jack
A technology of hydraulic jack and double thrust, applied in the direction of lifting device, etc., can solve the problems of environmental limitation, increase of mining difficulty, mining cost, inconvenience, etc.
Active Publication Date: 2015-05-06
巨隆液压设备(集团)有限公司
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Problems solved by technology
However, due to the narrow mining space, the environment has certain restrictions, and the mining layer usually has a certain inclination
Therefore, in different situations, it is necessary to choose jacks with different strokes and different thrusts according to the working environment, which is very inconvenient and increases the difficulty and cost of mining.
Method used
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[0018] Such as figure 1 As shown, figure 1 It is a structural schematic diagram of a double-stroke double-thrust hydraulic jack proposed by the present invention.
[0019] Reference figure 1 , The present invention proposes a double-stroke double-thrust hydraulic jack, including: cylinder head 1, cylinder 2, first piston 3, second piston 4, first piston rod 5, second piston rod 6, first guide sleeve 7. The second guide sleeve 8, the first fastener 91, and the second fastener 92;
[0020] The cylinder barrel 2 has a through cavity and openings at both ends. The side wall of the cylinder barrel 2 is provided with a first through hole, a second through hole, and a third through hole. The first through hole and the second through hole are in the cylinder barrel 2. Are arranged at intervals in the axial direction, a first joint seat 21 is provided at the first through hole, the first joint seat 21 communicates with the through cavity through the first through hole, and a second joint...
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The invention discloses a double-stroke and double-thrust hydraulic jack. The interior of a cylinder is provided with a through cavity; a cylinder cover and a first guide sleeve are respectively arranged at two ends of the cylinder; a first joint base and a second joint base are arranged on the side wall of the cylinder and are communicated with the through cavity; a first piston is positioned between the first joint base and the second joint base in the cylinder; one end, away from the first piston, of a first piston rod extends out of the through cavity from an opening in the middle part of the first guide sleeve; the interior of the first piston rod is provided with an axial cavity which extends from one end away from the cylinder cover to the middle part; a second piston and a piston rod are arranged in the axial cavity, and sealing pieces are respectively arranged between the piston and the cylinder as well as between the guide sleeve and the piston rod. The double-stroke and double-thrust hydraulic jack has the advantages that for a hydraulic bracket top beam balance maintaining device, the integral structure is compact, and the design is reasonable; the different working pistons can be selected according to the working requirements, so different working pressures and working strokes are realized.
Description
Technical field [0001] The invention relates to the technical field of jacks, in particular to a double-stroke double-thrust hydraulic jack. Background technique [0002] The side jack is a commonly used support device in fully mechanized mining operations. In the working process of the existing jacks, the stroke of a single jack is fixed, and the applied thrust is fixed. However, due to the narrow mining space, the environment has certain restrictions, and the mining layer usually has a certain inclination. Therefore, in different situations, it is necessary to select jacks with different strokes and different thrusts according to the working environment, which is very inconvenient and increases the difficulty and cost of mining. Summary of the invention [0003] In order to solve the technical problems existing in the background art, the present invention proposes a double-stroke double-thrust hydraulic jack, which has a reasonable structure design, can select different pressu...
Claims
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IPC IPC(8): B66F3/43B66F3/26
CPCB66F3/26B66F3/43
Inventor 袁强国许洪山任乾坤周文瑛朱于刚
Owner 巨隆液压设备(集团)有限公司