Multi-stage telescopic oil cylinder and crane
A telescopic oil cylinder and crane technology, applied in the direction of cranes, fluid pressure actuating devices, etc., can solve the problems of large size of the oil cylinder and increase the weight of the telescopic arm, and achieve the effect of ensuring the stability and reliability of the telescopic and simple structure.
Active Publication Date: 2019-07-23
HUNAN SHUANGDA ELECTROMECHANICAL CO LTD
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Problems solved by technology
[0003] In view of this, the object of the present invention is to provide a multi-stage telescopic oil cylinder and a crane to solve the technical problem in the prior art that the size of the oil cylinder is too large and the weight of the telescopic arm is correspondingly increased
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[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0027] The descriptions of "first", "second" and so on in the present invention are only for the purpose of description, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity or order of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0028] refer to Figure 1 to Figure 3 , this embodiment provides a multi-stage telescopic oil cylinder, the multi-stage telescopic oil cylinder includes a piston rod 100 connected from the inside to the outside, at least one inner cylinder 200 and an outer cylinder 300, and each inner cylinder ...
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The invention provides a multi-stage telescopic oil cylinder and a crane. The multi-stage telescopic oil cylinder comprises a piston rod, at least one stage inner cylinder barrel and one outer cylinder barrel which are connected from inside to outside in a sleeved mode, each stage of inner cylinder barrel comprises a first sleeve and a second sleeve sleeving on the outer wall of the first sleeve,the outer wall of the first sleeve is in contact with the inner wall of the second sleeve, the first sleeve and the second sleeve are in sealed connection with each other at the two ends, the outer wall of the first sleeve and / or the inner wall of the second sleeve is provided with a plurality of oil grooves, and the oil grooves are used for communicating rod cavities on the inner side and the outer side of the inner cylinder barrel. According to the multi-stage telescopic oil cylinder, the technical problems that the size of the oil cylinder is too large and the weight and load of a telescopic arm are correspondingly increased are solved, and meanwhile, the strength of the inner cylinder barrel of the oil cylinder and oil passing of the inner cylinder barrel and the rod cavities are not affected.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a multi-stage telescopic oil cylinder and a crane. Background technique [0002] In the current telescopic boom system, the telescopic boom mostly uses two-stage telescopic oil cylinders. The structure of this kind of oil cylinder is relatively complicated. The cylinder generally includes oil passages. The oil passages can be processed by deep hole drills, but the disadvantage is that the straightness of the drilling is very demanding High, and generally the wall thickness of the cylinder is relatively small, so it is difficult to ensure straightness; in addition, the length of the drill bit is limited, and it is difficult to process long cylinders. The cylinder barrel of the oil cylinder can also be welded with two sleeves, leaving a certain gap in the middle to form an annular oil passage to connect the rod chambers on both sides of the cylinder barrel. In this me...
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Login to View More IPC IPC(8): F15B15/16F15B15/20B66C23/693
CPCB66C23/705F15B15/16F15B15/20
Inventor 卿丽纯郭方云方怡红王清泉
Owner HUNAN SHUANGDA ELECTROMECHANICAL CO LTD