DE7820253U1 - SUPPORT DEVICE, CONSISTING OF A SUPPORT ARM AND A HYDRAULICALLY LENGTH-ADJUSTABLE PIPE FOOT CONNECTED TO IT, IN PARTICULAR, IN ASSIGNMENT WITH AN EXTENSION, e.g. DISTRIBUTION POLES, EQUIPPED CONSTRUCTION MACHINES, LIKE CONCRETE PUMPS OR THE LIKE. - Google Patents

Description

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The invention relates to a support device, each consisting of a support arm and one with it connected hydraulically length-adjustable tubular foot, in particular in association with booms, e.g. placing booms, equipped construction machines, such as concrete pumps or the like.

Support devices of this type are known per se, whereby a conventional hydraulic cylinder is connected to the support arm, which is usually pivotable in a vehicle or machine frame, the piston rod of which is a) directly via a pressure plate or b) indirectly as an actuator ßn a support foot the support function on the support arm causes.

These concepts have the disadvantage of cumbersome and complex handling, and expensive Construction through the use of separate actuating cylinders and support feet and a large working and Material expenditure it.

In addition, there is a relatively great vulnerability individual parts given in the context of the rough construction site operation.

It is therefore the object of this invention to provide a support device according to the classification given at the beginning to name the better for the rough construction site operations is suitable and in which the hydraulic fluid supply, the piston rod and the sealing elements are largely protected from external influences.

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The inventive solution provides that in one with the support arm connected to a support cylinder firmly connected to the upper cylinder base, axially arranged, provided with a piston equipped piston rod

is that with at least one controlled by valve on the inlet side, essentially axial or

axially parallel, opening on the underside of the piston j and each with at least one,

also essentially axially or axially parallel to

Piston rod guided, but above the piston. exiting approximately radially, through the valve on the inlet side controllable passage is equipped that in the

^f * support cylinder through the piston and a tube foot outer

and inside pipe guide a cylindrical pipe base was added is axially displaceable to the piston in both directions by different hydraulic filling is mounted in the support cylinder on the piston rod, that here the valve or valves for the passage or passages to the bottom of the piston in the lower space and for the passage or passages above the piston in the upper space se is formed or are that When the tube foot is extended, the lower space below the piston can be filled with hydraulic fluid and the upper space above the piston can be emptied of hydraulic medium and that when the pipe foot is retracted

reverse opening ratios for the valves

are given.

Such an embodiment provides for a stationary arrangement of the piston in the support cylinder and a displacement of the pressure cylinder designed as a tubular foot essentially within the support cylinder ,

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offers extensive protection against construction site-related External influences.

It allows the supply and discharge lines leading to the valves for the hydraulic system to be permanently installed Hittel in the support arm and a clear flow of force in the axial direction of the support cylinder.

Wear and maintenance are significantly reduced and handling is simplified.

I> he device designed in this way according to the generic term is the task in full f erecJat.

A further development provides that the valves are built into the upper cylinder base of the support cylinder are. This further reduces the risk of damage; the valves are preferred designed as exchangeable inserts that can be introduced into the cylinder base.

To ensure clear support, it is advisable to attach a joint to the pipe foot using a To connect the base plate. It is particularly advantageous, but not always necessary, to connect the Base plate over a cardan joint. In the interest of a self-cleaning option for the pipe foot external guide and the tubular foot itself, it is advantageous to design the tubular foot external guide as a three-point bearing, a three-point ball bearing is preferably thought of.

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The seals of the piston and the pipe joint guide opposite the pipe base and the piston rod are designed for 200 bar.

The invention is illustrated by the accompanying drawing
an exemplary embodiment explained in more detail.

The illustration partially shows one usually
on a vehicle pivotably articulated support arm 1, which a support leg 2, consisting essentially of
a support cylinder 3, the upper cylinder base 4 of which a piston rod 5 is firmly connected to the center of the piston 6.

The piston rod 5 closes around the piston 6
by means of the inner guide 7 and the support cylinder on the outer guide 8, the outer guide is preferably designed as a three-point bearing. The space 10 above the piston 6 can be filled or emptied with hydraulic medium 14 via the passage 11 controlled by the valve 12, while the space 13 below the piston 6 can be filled or emptied with hydraulic medium via the passage 16 controlled by the valve.

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If now the room 10 via valve 12 and passage 11 is charged with hydraulic fluid, the pipe foot 9 is retracted and at the same time the space 12 below the When the valve 15 is open, the piston is emptied through the passage 16 and hydraulic medium. When extending the tubular foot 9 the hydraulic control process is reversed. The pipe foot 9 is down via a hinge pin movably connected to the base plate 18.

A dimensioning example is provided for further explanation.

The device is designed for a maximum support load of 11 tons. A tube 140 10 mm closed at the top by the cylinder base 4 is connected to the support arm 1 as a support cylinder 2. A tube 50 15 mm is welded to the cylinder base as a piston rod 5, through that the passages 11 and 16, which also consist of tubes 8 1.5 mm, lead into the spaces 13 and 10. The piston (including the seals) has a diameter of approx. 90 mm and the tube foot 9, which acts as a pressure cylinder and is guided on the piston rod 5 and on the outer tube guide, has dimensions of 120 × 15 mm. The seals of the piston 6 to the inner diameter of the tube foot 9 and the tube foot inner guide to the piston rod 5 are, as mentioned, designed for a pressure of 200 bar, and the tube lengths are matched so that a maximum stroke of about 600 mm is given and with this Stroke about 60 % of the length of the tubular foot 9 remain within the support cylinder 3.

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The device is designed for a maximum support load of 11 to, especially with a piston area 63.6 cm corresponds to a pressure of approx. 173 bar.

Claims (6)

/ 23d // ο; ; \ tm \ -; ο ■ »-," '' ■ ■ · Claims 1. Support device, each consisting of one Support arm and a hydraulically adjustable tubular foot connected to it, in particular in association for construction machines equipped with booms, e.g. placing booms, such as concrete pumps or the like, characterized that in a support arm connected to the support arm, cylinder (3) one firmly to the upper cylinder base connected, axially arranged, equipped with a piston (6) piston rod (-5) is provided, which with each ^{-I 1} SiIs at least one emgangsseitiy prevailed through valve ^ 15), guided essentially axially or axially parallel, opening out on the underside of the piston Passage (16) and each with at least one, also essentially axially or axially parallel to the piston rod (5), but above the piston (6) 'S ₅ at. _f exiting approximately radially, through valve (12) inlet laterally controllable passage (11) is equipped, that in the support cylinder (3) through the piston (6) and a Rohrfußaußen- and Rohrf ußinnenf iihrung (7/8) a cylindrical tube foot is received, which axially to the piston (6) displaceable in both directions by different hydraulic filling (14) in the support cylinder (3) on the piston rod (5) ge is stored - 9 - 1/236/78. · ..- · 9 that this or the valves for the one or more passages (1b) to the underside of the piston (6) in the lower space (13) and for the passage or passages (11) above the piston (6) in the upper space (10) are formed in this way is or are that when the tubular foot (9) is extended, the lower space (13) below the piston can be filled with hydraulic fluid (14) and the upper one Space (10) above the piston (6) of hydraulic fluid Can be emptied and when the tubular foot (9) is retracted, the opening ratios are reversed for the Valves (12/15) are given. 2. Support device according to claim 1, characterized in that that the valves (12/15) in the upper cylinder base (4) of the support cylinder (3) are installed. 3. Support device according to claim 1 and 2, characterized. that with the pipe foot (9) via hinge pin (17) a base plate (18) is connected. 4. Support device according to claim 3, characterized in that that the pipe foot (9) is connected to a base plate (18) via a universal joint. - 10 - ιιι i . / - t · · «· all it ( 1/236/78: :: «-" to: -: ■::: • · · a · ι t · · «· al 5- support device according to claim 1, characterized
marked, that the pipe foot outer guide (8) as a three-I point bearing is formed. j 6. Support device according to claim 5, characterized | marked: that the as Rohrfußaußenführung (8) vor-? seen three-point bearing a three-point ball bearing is.