ES2291064A1 - Cylindrical telescope of double effect has cylindrical jacket, one or more intermediate rod and internal rod, where inlets for entry of fluid drive are provided, longitudinal conduction, rear exterior window and interior front window - Google Patents

Abstract

The cylindrical telescope has a cylindrical jacket, one or more intermediate rod and an internal rod. The inlets for the entry of the fluid drive are provided. A longitudinal conduction, a rear exterior window and an interior front window, which establish a permanent communication of inlet of the jacket with successive backward movement of camera, are provided. The successive backward movement of camera determines the introduction of fluid pressure in inlet in the rods of folded position of the cylinder.

Description

Double acting telescopic cylinder.

Object of the invention

The present invention relates to a cylinder double-acting, of the kind that comprise a shirt outer, one or more intermediate stems and an inner stem, presenting the outer jacket a feed pressure, a recoil pressure outlet, an outer cover and a plug-guide at the end where they are emerging the stems. This cylinder is suitable for hydraulic fluid and for pneumatic fluid

Background of the invention

In pneumatic or hydraulic systems it is frequent use of multiple telescopic cylinders, provided with an outer jacket and a plurality of stems telescopically mounted, one inside the other, so that the  introduction of fluid through a pressure outlet causes extension or deployed the cylinder, increasing its length. This is it is because the entry of fluid into a rear chamber causes the push the stems towards an extended position.

In turn, in single-rod cylinders is Common configuration known as double acting. In this configuration, the outer jacket comprises two inner chambers, separated by a piston, this piston being attached to the rod scrollable The introduction of pressurized fluid into a chamber causes the stem to advance and the introduction into the other chamber the recoil or collection of the stem.

However, in telescopic cylinders multiple, provided with several movable stems, it is difficult implement a double-acting mechanism, since the cameras of forward and reverse are not maintained within the outer jacket, but they move with adjacent stems, forcing use sleeves outside the cylinder to introduce the fluid responsible for causing the recoil or collection of stems This construction, besides being complex, requires the use of additional sleeves which increases the risk of leaks and breakdowns.

Description of the invention

The double acting telescopic cylinder of the The present invention has constructive characteristics that notably simplify its construction and avoid the use of connection sleeves for the fluid responsible for causing the recoil or stem picking. The constitution of this double acting telescopic cylinder can be operated both hydraulically as pneumatically, although it has been devised mainly For use in hydraulic installations.

The cylinder comprises an outer jacket, one or more intermediate stems and an inner stem, so that the intermediate stems and inner shank can extend and collect telescopically.

The outer jacket and intermediate stems they comprise at their front ends a guide plug which seals the immediate inner stem. Turn the shirt exterior comprises a rear closure cover and two sockets lateral of fluid pressure: one for the introduction of the fluid forward and another outlet for the introduction of the backward fluid, said fluid being supplied by a hydraulic group or conventional tire

Each stem comprises at its rear end a piston that divides the inner space of the jacket or rod immediately outside in a feed chamber communicated with the socket of forward pressure and in a recoil chamber accessed the pressurized fluid that enters through the pressure tap of recoil.

The intermediate stems are planned understand in its wall a conduit or longitudinal cavity that communicates through an exterior-rear window with the recoil chamber of the shirt or the immediate outer stem and an interior-front window that communicates with the recoil chamber of the immediate anterior stem. As pressurized fluid is introduced through the recoil inlet of the outer chamber, said the fluid passes through the windows and of the ducts or longitudinal cavities of the walls of the stems towards the successive recoil chambers, causing retraction of the stems and consequently the collection of cylinder.

In order to prevent windows exterior-rear are sealed by guiding cap of the shirt or immediate stem outside, in the unfolded position of the cylinder, said gluttons have a perimeter recess in the that loosely lodges the window exterior-rear of the immediate inner stem.

To allow the progress of the different stems, as pressurized fluid is introduced through the inlet of feed fluid defined in the jacket, it is expected that rear plugs have a hole for fluid access to the advance chambers of successive stems.

Description of the figures

To complement the description that is being performing and in order to facilitate the understanding of characteristics of the invention, is attached herein descriptive a set of drawings in which, for illustrative purposes and not limiting, the following has been represented:

- Figure 1 shows an elevation view of a exemplary embodiment of the telescopic cylinder of the invention, in deployed position.

- Figure 2 shows a sectional view longitudinally of one half of the cylinder, folded or picked up

- Figure 3 shows a view similar to that of the previous figure, during the extension or deployment of the cylinder.

- Figure 4 shows a view similar to the previous figure, during refolding or collecting the cylinder.

Preferred Embodiment of the Invention

As can be seen in the figures referenced the double acting telescopic cylinder comprises a outer jacket (1), one or several intermediate stems (2 and 3) and a inner stem (4), said intermediate stems presenting (2 and 3) and inner (4) pistons (21 and 41) separating ones forward chambers (5) and backward chambers (6). In turn, the inner rod comprises an anchor (9) at its end Exterior.

The outer shirt (1) has a socket (11) for the feed of the feed fluid, communicated with its chamber of feed (5) and a socket (12) for the inlet of the recoil fluid (12), communicated with its backup camera (6).

Said shirt (1) further comprises a cover rear (7) and a guide plug (8), anterior, with the corresponding gaskets (10).

Each intermediate rod (2 and 3) comprises a cylindrical body (22) with a piston (21) at its rear end and a guide plug (8) at its front end, being provided with the piston (21) and the guide plug (8) of the corresponding gaskets (10).

In the wall of said body (22) is defined a conduction or longitudinal chamber (221), which presents an exterior-rear window (222) and a window interior-front (223), communicating through said windows and longitudinal chamber the two recoil chambers (6) adjacent. The inner rod (4) has at its end emerging an anchor (9).

Each guide plug (8) comprises a interior recess (81) whose mission is to prevent said plugs-guide get the window exterior-rear (222) of the immediate stem inside (2, 3, 4) when the cylinder is fully unfolded.

In a preferred embodiment the body (22) of the intermediate stems (2, 3) may consist of two concentric tubes, conveniently sealed at their ends, defining the longitudinal conduit or chamber (221) with each other, being defined respectively in said cylindrical tubes the windows (222 and 223). In an alternative embodiment the body (22) of the intermediate stems may have a wall solid, the duct being machined on said wall longitudinal (221), conveniently closed at its ends, and the exterior and interior windows (222, 223).

Once nature is sufficiently described of the invention, as well as a preferred embodiment, for the appropriate purposes that the materials, form, size and arrangement of the elements described may be modified, as long as this does not imply an alteration of the essential features of the invention claimed in continuation.

Claims (3)

1. Double acting telescopic cylinder, of the type comprising: - an outer jacket (1) provided with a rear cover (7) and an anterior guide plug (8), - one or more intermediate rods (2 and 3) formed by a tubular body (22) that incorporates at its rear end a piston (21) and at its front end a guide plug (8) and, - an inner rod (4), which comprises at the rear end a piston (41); the inner chambers of the jacket (1) and the intermediate rods (2,3) of the pistons (21, 41) being divided by the piston of the rod (2, 3, 4) immediately inside, in a discharge chamber (5) and a recoil camera (6); characterized in that the sockets (11, 12) for the input of the impulse and retraction fluid of the stems (2, 3, 4) are defined in the outer sleeve (1) and because the bodies (22) of the intermediate stems (2 and 3) have a longitudinal conduction (221), an exterior-rear window (222) and an interior-front window (223), which establish a permanent communication of the socket (12) of the outer jacket (12) with the successive recoil chambers (6), determining the introduction of pressurized fluid through said jack (12) of the jacket (1) the retraction of the stems (2, 3, 4) towards the retracted position of the cylinder. 2. Cylinder according to claim 1, characterized in that each guide plug (8) comprises an inner recess (81) that prevents the sealing of the outer-rear window (222) of the immediate inner rod, when the cylinder is located fully deployed 3. Cylinder according to claim 1, characterized in that the pistons (21) of the intermediate cylinders (2,3) have two holes for permanent communication of the socket (11) of the outer jacket with the successive drive chambers ( 5).