DE2149849A1 - Stabilizer - Google Patents

Description

DIPL-ING. HORST ROSE DIPL-ING. PETER KOSEL

3353 Bad Gande.si.eim, October 5, 1971

P.O. Box 129

Hohenhöfen5

Telephone: (05382) 2842

Telegram address: Siedpatent Badgandersheim

Our file no. 2479/10

RIGHIER

Patent application dated October 5, 1971

RIGHIER

7, avenue Ingres
75-Paris / France

Stabilizer

The invention relates to a stabilizing device for preferably mobile devices in the manner of earth-moving machines, Transport or maintenance vehicles, mobile cranes or the like., With the device serving two pairs of for support on the ground Has legs or supports, which can be controlled by hydraulic cylinders and on the front or the back of the stabilizing device are arranged.

In civil engineering, mobile devices are used to collect considerable, Lifting loads of different sizes or performing excavation work. This applies, for example, to cranes, backhoe excavators, Excavators, etc., which are provided with movable support members or support legs which are brought to bear against the ground can be used to increase the surface area of the carrying polygon of the device while working.

Heretofore, the support members or legs have been placed directly on the chassis of the machine and their movements have been controlled by hydraulic cylinders controlled. Usually a single control valve is used to control all of the support legs at the same time

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Bank account: Norddeutsche Landesbank, Bad Gandershstm branch. Account no. 22,118,970 ■ Postal checking account: Hannover 66715

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to supply serving hydraulic cylinder with pressure medium.

The disadvantage of this type of control is that the operator the extension movements of the support members or -beirie not controlled, because the forces acting on the individual control cylinders of the support legs are selected, are generally unequal, so the legs that are least stressed are the first to move.

On the other hand, it often happens that the support legs sink more or less into the ground during work, so that ) the device gets into an unstable equilibrium on only three support legs, since one of the four support legs is no longer is supported against the ground.

Palis in this all the piston rods of the stabilizing cylinders are not fully extended, the operator can put the device back on four support legs by it opens the control valve in order to feed the working cylinder with pressurized pressure medium. The cylinder, in which the pressure is naturally reduced (because the corresponding support leg is no longer supported on the ground), so with new Pressure medium is supplied, and its piston moves until the corresponding leg is supported on the ground again.

ψ On the other hand, are the piston rods of the working cylinders already

fully extended, it is no longer possible to use the device again in four places on the floor, except when you drive the device away to another suitable support surface Looking for.

It is therefore an object of the invention to provide a stabilizer to create a device for devices of the type mentioned, which at least partially avoids the disadvantages mentioned above.

According to the invention, this is achieved in the case of a stabilizing device mentioned at the outset in that iaiir: astens one of the pairs of support legs is arranged on a traverse, the latter around a perpendicular to it and to the

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Central plane of the chassis of the device is articulated parallel axis that the articulated traverse relative to its axis can be locked to the chassis by means of appropriate devices, which also allow the crossbeam to pivot about its pivot axis allow, if "in one of the legs arranged on the traverse, the support on the ground ceases to be so restore the support of this support leg on the ground. In this way it is possible by pivoting the Traverse to restore the ground contact that was lost on a supporting leg even if the piston rods the hydraulic cylinders are fully extended.

According to a particularly advantageous embodiment of the invention, the stabilizing device is designed so that two single-acting working cylinders are provided to lock the hinged crossbeam in relation to the chassis, which between the hinged traverse and the chassis on both sides of the hinged the traverse on the chassis Articulation axis are provided, and that the cylinder spaces of these working cylinders can be connected to one another to pivot of the traverse to effect its anlenic axis when there is a pressure difference between these two cylinder chambers as a result of not being supported on the ground of one of the two support legs arranged on the articulated traverse exists to support the unsupported leg again to bring against the ground.

Further details and advantageous developments of the invention emerge from what is described below and Ausfünrungsbeispiel shown in the drawing, as well as from the subclaims.

Show it

Fig. 1 is a schematic, three-dimensional representation of the chassis with a stabilizing device according to the invention provided device in the manner of an earthmoving machine, a transport or maintenance vehicle, and

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Pig. 2 a representation of the hydraulic and pneumatic Control circuits of the stabilizer according to Fig.

Fig. 1 shows aas chassis of a device, aas with an inventive Stabilizer is provided. The chassis 1 carries a (not shown) boom or a cantilever arm which is adjustable by rotating about a pivot 2 arranged on the chassis with a vertical Axis. On the chassis 1, two traverses or cross members 3 and 4 are arranged. The 'i'raverse 3 is at the front of the chassis rigidly attached, while aie traverse 4 on the

fc rear side of the chassis is hinged to an axle 5, which latter runs perpendicular to the traverse 4 and parallel to the Hitteleoene of the chassis. At the ends of the trusses 3 and 4 are articulated at 6, 7, 8 and 9 support legs 10, 11, 12 una, which by assigned double-acting hydraulic cylinders 14, 15, 16 and 17 can be actuated. Both Cylinders 14 ″ to 17 each have the cylinder body attached to the crossbeam on which the actuatable Support leg is articulated, and its piston rod is in the manner shown at its free end on the uppermost part hinged to the associated support leg. In addition, the movements of the cross member 4 about the axis 5 by means of a pair controlled by single-acting hydraulic cylinders 18 and 19,

"which between the chassis 1 and the traverse 4 on the one and on the other side of the axis 5 are arranged.

With 20 to 23 the wheels are referred to, on which the device moves when you want to change its location. These wheels are partially or completely relieved, when the stabilizer is actuated.

Pig. 2 shows the control circuits of the stabilizing device n :: ch Fig _o 1. These control circuits have a hydraulic circuit and a pneumatic circuit. I-he hydraulic circuit is fed by a pump 30, which supplied the hydraulic pressure necessary for all the equipment of the device. The pump 30 sucks oil from a feed

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storage tank 31 and is controlled by a pilot operated pressure relief valve 32 secured against overpressure. It feeds the various work equipment (not shown) via a line 33 of the device, and, via a valve 34, the four hydraulic cylinders 14 to 17 which operate the support legs. The pneumatic circuit is fed by a compressed air source 36; on the one hand, it enables of valves 54 and 55, which control the connection of the cylinder chambers 18a and 19a of the hydraulic cylinders 18 and 19, and on the other hand, the locking of the cross member 4 in its position about the axis 5, and finally the actuation of the valves 37 and 38, which control the supply of pressure medium to the cylinder chambers of the hydraulic cylinders 14 and 15, which latter are arranged on the traverse 3 and serve to bring the support legs 10 and 11 for support on the ground.

It should be pointed out that the cylinder chambers 18a and 19a of the hydraulic cylinders 18 and 19, the chamber 57b of the pressure accumulator 56 and the line 62 are constantly filled with pressurized oil, this pressure being dependent on the pressure in the chamber 57a of the Pressure accumulator 56 prevails, the minimum value being that which is supplied by the pressure ± air source 36.

To lower the support, the valve 34 is opened by actuating the control lever 35 in such a way that the oil delivered by the pump 3u flows through the line 39. Since the valves 37 and 38 are normally closed, the oil first flows into the spaces 16b and 17b of the hydraulic cylinders 16 and 17, whereby it flows through the pilot operated check valves 40 and 41. As a result, the supports 12 and 13 located on the rear of the device are lowered, come to rest against the ground and lift the rear part of the device, relieving the rear wheels 22 and 23. The check valves 40 and 41 are used to ensure that the hydraulic cylinders 16 and 17 are locked when the valve 34 is in its closed neutral position Definde L _0. The lines 40a and 41a are used for

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Control of valves 40 and 41 to raise the support legs 12 and 13 to enable. Since the rest of the first Valves 54 and 55, which ax connection of the hydraulic cylinder 18 and 19 control, are closed, is when scorching the support legs 12 and 13, the traverse 4 m of their position blocked with regard to chassis 1,

If you now also lower the two front support legs 10 and 11 wij.1, you open the valve 42 of the pneumatic circuit by actuating the lever 43, so that the Preüluxt supplied by the compressed air source 36 reaches the cylinder 45 via the line 44 in order to move the piston 45a against aii force of the return spring 45b and to cause the opening of the valves 37 and 38, whereby the oil in the line 39 can flow into the cylinder chambers 14b and 15b of the hydraulic cylinders 14 and 15 via the lines 4c izv, _w 47, so that the support legs 10 and 11 are lowered.

When the four support legs have come to rest on the ground in the correct way and one believes that the appliance is completely stable, one brings the valve 34 into its closed neutral position and at the same time closes the valve 42. When the valve 42 closed v / iri, the piston 45a moves under the action of its return spring ψ 45b in its position shown in Fig. 2 back and causes the closing of the valves 37 and 38. An outflow valve 4.8 is provided on the line 44 so that the trapped there Compressed air can escape.

It should be pointed out that, if desired, all four support legs can be placed against the could bring bottom by opening the valve 42 at the same time as the valve 34, so that the cylinder ranks 14b to 17b the hydraulic cylinders 14 to 17 are simultaneously fed with pressurized hydraulic pressure medium,

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If in the course of the work the device comes to an unstable equilibrium on only three legs, e.g. as a result of If the ground subsides or gives way, it is possible to bring the device back into a stable equilibrium without having to move it to another location.

For example, assume that the device is in. an unstable equilibrium is on the three support legs 10, 12 and 13, aa the front support leg 11 is no longer is supported on the ground. In this jj'all the fluid pressure increases in the cylinder space 15b of the hydraulic cylinder 15, while the pressure in the cylinder space 14b of the hydraulic cylinder 14 increases, since the support leg 10 carries the entire weight of the Must carry the front part of the device. Palis the hydraulic cylinder 15 is not fully extended, the support leg can be opened 11 again to support it against the floor by briefly opening the valve 42 in order to prevent the opening of the To effect valves 37 and 38 and thereby to urge the cylinder spaces 14b and 15b with one another into VerTjitidi-ng. Then flows pressurized pressure medium from the cylinder chamber 14b into the cylinder chamber 1! pb and causes the hydraulic cylinder to extend 15 until the support leg 11 comes back to support on the ground.

So you can see that the control arrangement for the Hydrauliiczylinaer 14 and 15, which is designated as a whole by the letter A, the restoration of the support of the Support legs allowed without the pump 30 therefore having to be used, which so undisturbed the hydraulic Can continue to supply work equipment of the device with pressure medium.

If, on the other hand, one of the rear support legs, e.g. the Support leg 13, is no longer supported on the ground, you can open the cylinder space 17 ″ b again with pressurized pressure medium feed by opening the valve 34. However, the prerequisite is that the piston rod of the hydraulic cylinder 17

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Ms has not yet extended to its stop. as Variant, or if the piston rods of the hydraulic cylinders are already "extended to their stop, you can do how proceed as follows: The valve 50 of the pneumatic circuit is opened by actuating the lever 51 'so that compressed air flows from the compressed air source 36 via the line 52 to the cylinder 53 and displaces the piston 53a against its return spring 53b, whereby the valves 54 and 55 are opened. Here is it should be noted that these two valves normally remain closed to the crossbeam 4 with respect to the chassis fc 1 to lock. When the valves 54 and 55 are open, the cylinder spaces 18a and 19a are in communication with one another, and pressurized oil from the cylinder space 18a flows into the cylinder space 19a, in which the latter the Pressure had decreased as a result of the fact that the Support leg 13 was no longer supported on the ground. This causes the traverse 4 to pivot about the axis 5, namely in the direction of arrow f (Fig. 1). This pivoting continues until the support leg 13 again comes to support on the ground and the pressures in the cylinder chambers 18a and 19a have equalized.

The pressure accumulator 56, its space 57a at the opening

k of the valve 50 via the check valve 58 in connection with the compressed air source 36 has been brought, makes it possible to maintain a suitable pressure in the cylinder chambers 18a and 19a, thanks to the pressurized Pressure medium in space 57b, which is separated from space 57a by a membrane (compensation of leakage losses and Volume differences)

When the device is properly supported on its four support legs again, the valve 50 is closed again, whereby the piston 53a returns to its position shown in FIG. 2 under the action of the return spring 53b and the valves 54 and 55 closes. The traverse 4 is hereby locked in its newly assumed position. On the line 52, a valve 59 is provided so that stored there

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Compressed air can escape when the valve 50 is closed will.

The arrangement of the control for the hydraulic cylinders 12 and 13, denoted as a whole by the reference character B. is, thus makes it possible in all cases to bring about renewed support for one of the rear support legs.

If you want to lift the support legs 10 to 13, it is sufficient to bring valve 34 into its open position, which brings the pump 30 with the line 60 and the reservoir 31 with the line in connection, and at the same time to open the valve 42 to cause the opening of the valves 37 and 38 so as to the cylinder spaces 14a to 17a the hydraulic cylinders 14 to 17 with pressurized To feed oil ©

Naturally, the described embodiment is to be understood only as an example, and it is readily possible to modify it, in particular by substitution of technical equivalents, without the general iur invention thought of the present invention to leave.

In particular, the one shown in FIGS. 1 and 2 could Embodiment various modifications experienced So, for example, the traverse 3 could also be on the chassis articulated and locked by two hydraulic cylinders as is the case with traverse 4 of the Pail, instead of as shown, to be firmly attached to the chassis. Likewise, the front and rear pairs of cylinders could each be replaced by a Control arrangement A or a control arrangement B instead of a control arrangement A as shown or a control arrangement B to be controlled. Finally, it would also be possible for the control arrangements Δ and B to be closed combine to control each pair of hydraulic cylinders.

Patent attorneys Dipl.-Ing. Horst Rose Dipl.-Ing. Peter Kosel

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Claims (2)

DiPL-ING. HORST ROSE "DIPL.-ING. PETER KOSEL RIOHlEtt Patent application from the 5th Oictooer 3353 Bad Gandershelm, October 5, 1971 P.O. Box 129 Hohenhöfen 5 Telephone: (05382) 2842 Telegram address: Siedpatent Badgandershelm Our file no. 2479/10 Claims 1 .y Stabilizing device for preferably mobile devices like earthmoving machines, transport or Maintenance vehicles, mobile cranes or the like., The device has two pairs of legs or supports which are used for support on the ground and which can be controlled by hydraulic cylinders and are arranged on the front or rear of the device to be stabilized, characterized in that that at least one (12,13) of the pairs of support legs on a traverse (4) is arranged, the latter around a perpendicular to it and to the center plane of the chassis (1) of the device parallel axis (5) is articulated that the articulated traverse around its axis (5) relative to the chassis (1) can be locked by appropriate devices (18, 19), which also allow pivoting of the traverse (4) about its articulation axis (5) if one of the support legs (12, 13) arranged on the crossbeam (4) ceases to be supported on the ground, in order to restore the support of this support leg on the ground. 2. Device according to claim 1, characterized in that for locking the hinged cross member (4) with respect to the Chassis (1) two single-acting working cylinders (18,19) are provided, which between the articulated traverse (4) and the chassis (1) on both sides of the traverse '* f) on Chassis (1) articulating pivot axis (5) are provided, and that the cylinder spaces (18a, 19a) of these working cylinders (18,19) 209819/0577 Bank account: Norddeutsche Landesbank, Bad Qandsrshalm branch, account no. 22.118.970 Postal checking account: Hannover86715 are interconnectable (54,55) to cause a pivoting of a cross member (4) about its pivot axis (5), if a pressure difference between these two cylinder chambers (18a, 19a) as a result of not being supported on the bottom of one of the two support legs (12, 13) arranged on the articulated cross-member (4), around the unsupported leg to bring it back to support against the ground. 3 · Device according to claim 1 or 2, characterized in that it has means (37f38) for producing a Connection between those cylinder spaces (14b, 15b) of the hydraulic cylinders assigned to a pair of support legs (10, 11) (14,15), the pressure of which causes the lowering of these support legs (10,11), so that if, as a result of one of these legs (10, 11) being supported on the ground, there is a pressure difference between these cylinder spaces (14b, 15b) are present, the restoration of the pressure equilibrium in these cylinder spaces 14b, 15b) an additional lowering of the unsupported Beinesjund the restoration of its supporting structure Plant against the ground causes " 4. The device of claim 3, comprising a first pair of support legs arranged on a traverse hinged to the chassis and a second pair of on one fixed to the Chassis-attached traverse has support legs arranged, characterized in that the connection between the cylinder spaces (14b, 15b) of the hydraulic cylinders (14,15) serving means (37,38) cooperate with those hydraulic cylinders (14,15) which the Control movements of those support legs (10, 11) that are on the traverse (3) fixed to the chassis (1) are arranged. Patent Attorneys Dlpl.-lng. Horst Rose DipJ, -lng. Peter Kose! 209819/0577