CN201281054Y - Novel oil path structure for all-stage stretching of double-acting multi-stage cylinder - Google Patents

Abstract

The utility model discloses a novel oil passage structure used for each stage stretching of a dual-function multi-stage cylinder, belonging to a hydraulic multi-stage cylinder. An oil hole is drilled in the wall of a cylinder barrel, and a crescent slot is milled on the inner wall of the cylinder barrel; and the oil hole is communicated with the crescent slot, thus exerting the function of communicating an oil passage. The oil passage structure replaces the welding of a hard pipe or the connecting of a hose outside an oil cylinder, and solves the problem of oil leakage of a welding seam and the ageing of the hose. Each stage sealing does not pass by an oil port, thus greatly prolonging the service life and greatly reducing the installation space of the oil cylinder without limit on the using environment. The novel oil passage structure has the beneficial effects that the structure is simple, the utilization is convenient and the service life of the oil passage of the hydraulic multi-stage cylinder is prolonged.

Description

A kind of multistage cylinder of double-action flexible novel oilway structures at different levels that are used for

Technical field

The utility model relates to a kind of oil channel structures of hydraulic multi-stage cylinder, specifically is a kind of multistage cylinder of double-action flexible novel oilway structures at different levels that are used for.

Technical background

At present, domestic hydraulic multi-stage cylinder oil circuit adopts long flexible pipe to be connected rod head end mostly, move along with the motion of oil cylinder piston bar, along with the growth of service time, a series of problem will inevitably appear in flexible pipe: as material ageing, surface abrasion etc., and a lot of flexible pipe all limits to some extent for high temperature and low temperature environment, also have some multistage cylinders to adopt the double wall cylinder structure, though cancelled flexible pipe but weld defects is more, and taken relatively large space of main frame, be not suitable for engineering machinery large-tonnage main frame.

Summary of the invention

The utility model provides a kind of multistage cylinder of double-action flexible novel oilway structures at different levels that are used for, and purpose is the rubber hose in the cancellation prior art, avoids the weld defects of double wall cylinder, the working life of improving hydraulic multi-stage cylinder oil circuit.

The utility model is realized with following technological scheme: a kind of multistage cylinder of double-action flexible novel oilway structures at different levels that are used for, it is characterized in that: in the cylinder barrel wall of each cylinder barrel, be provided with the oilhole of two symmetries, on inner wall of cylinder, be provided with the crescent that is communicated with oilhole and constitute the oil circuit of linking up.

Owing to adopted said structure, substituted the welding of original technology oil cylinder outside hard tube or the connection of flexible pipe, solved the problem of aging of weld seam leakage of oil problem and flexible pipe.Adopt simultaneously and bore oilhole in casing wall, inwall mills the oil channel structures of crescent, and sealings at different levels are without hydraulic fluid port, on working life, be greatly improved, and reduced the oil cylinder installing space greatly, be of value to the application of engineering machinery large-tonnage main frame, simultaneously for not limiting on the Environmental Conditions.

The beneficial effects of the utility model are: simple in structure, easy to use, and the working life of having improved hydraulic multi-stage cylinder oil circuit.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the oil channel structures schematic representation;

Fig. 2 is the B-B sectional drawing of Fig. 1;

Fig. 3 is the utility model overall structure schematic representation.

Among the figure: 1, cylinder barrel wall, 2, oilhole, 3, crescent.

Embodiment

As depicted in figs. 1 and 2, symmetry is bored two oilholes 2 in the cylinder barrel wall 1 of oil cylinder, mills crescent 3 on the inner wall of cylinder, bores oilhole 2 and crescent 3 and is connected, and constitutes the oil channel structures of first-stage cylinder.

The multistage cylinder oil circuit of double-action as shown in Figure 3 adopts the oil circuit of new structure illustrated in figures 1 and 2, and each grade oil circuit all is equal to above structure, adds up step by step to constitute the advancing of whole cylinder, oil circuit.Promptly adopt and in oil cylinder cylinder barrel walls 1 at different levels, bore oilhole 2, on the inwall of cylinder barrels at different levels, mill crescent 3, played the effect of linking up oil circuit; Constitute multistage cylinder flexible novel oilway structures at different levels.Sealings at different levels are greatly improved on working life without hydraulic fluid port, and have reduced the oil cylinder installing space greatly, are of value to the exploitation of engineering machinery large-tonnage main frame, simultaneously for also not limiting on the Environmental Conditions.

Claims (1)

1, a kind of multistage cylinder of double-action flexible novel oilway structures at different levels that are used for, it is characterized in that: in the cylinder barrel wall (1) of each cylinder barrel, be provided with the oilhole (2) of two symmetries, on inner wall of cylinder, be provided with the crescent (3) that is communicated with oilhole (2) and constitute the oil circuit of linking up.

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