DE1580793C - Device for hydraulic wheel pressure compensation for four- or multi-wheel vehicles - Google Patents

Description

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The main patent 1480 185 relates to a device for the damping properties of the wheel suspension for hydraulic wheel pressure compensation for four- and finally an arbitrary lifting one or more wheeled motor vehicles with individual hydraulic vehicle wheels or wheel groups. Iris special cylinders, which in each case carry the proportional loads of individual ones, the wheel pressure equalization device is suitable for transferring wheels or wheel groups and which have double 5 according to the main patent for off-road vehicles for acting pistons, with lockable special vehicles for transporting heavy and connecting lines between the frontal bulky loads and for crane vehicles,
and the cylinder space on the piston rod side in the case of the © wheel pressure compensation device according to at least some of these hydraulic cylinders and main patent is the connection of the vehicle suspension with lockable compensation lines, which each compulsorily connect to the actuation of the switching elements on the end-side cylinder spaces or the piston rods, which in the locked position each connect the The connecting-side cylinder spaces of the hydraulic cylinders of a connection between the front-side cylinder space and the balancing group connect with one another, which block the cylinder space on the piston rod side of the hydraulic cylinders that also combine the following features. Also allows the points: 15 wheel pressure compensation device according to the main -.._ ..,, », .. ',, ■ · patent no cross-wise ■ connection of the front

a) The closure of the connecting lines be- _{Seiu Zylinderr} Space by the hydraulic cylinder of a see the front side and the piston rod _Radgnippe interconnecting balance-side cylinder chamber of the hydraulic cylinder ER- _{20 space emer other wheel group lines with the} piston rod-side cylinder follows from the driving position arbitrarily, together verbinyorzugsweise means Druckrnittelubertr.agung, _Denden compensation lines.

actuated switching elements, the hydraulic, _m j _{,. ^,. ^ mi the Erzic} , _even better stability

zylmdem at least two each other. _lit ity properties of with wheel pressure compensation

Numerous ordered bikes or groups of bikes in their _{direction according to the} main patent

The present invention aims at an open position at the same time as a spring for vehicles

acting hydropneumatic accumulator to improve and further training of the wheel

scna ten, pressure compensation device according to the main patent

b) the blocking of the equalizing lines between: 1480185 in terms of the solution to the problem, both see the frontal cylinder chambers or / the vehicle suspension even when in the locked position and to be able to connect between the piston rod-side cylinder 3 ° sensitive switching elements, as the hydraulic cylinder of an Aus also such a cross connection between The same group also takes place through the front cylinder chambers of the hydraulic station from the Fahden from arbitrarily, preferably by means of cylinders of a wheel group connecting compensating pressure medium transmission, actuatable shut-off lines with the cylinder elements on the piston rod side, ■ 35 spaces for the hydraulic cylinders of the other wheel group

c) To be able to hold the amount of liquid in the frontal cylinders. In particular, other spaces and the in the piston rod-side % ^c f ^ebt ' ^{this du} " ^h . ^{Emen emzI} & ^{en hand} 8 ^{rifi of the} cylinder space of the hydraulic cylinder of each; driver is possible.

This object is achieved according to the invention

arbitrary space, preferably by means of ⁴ ° 8 ^e ! ^ost ' ^{that dl} ! ^rc S ^C ' ⁿ S ^emem , same set of ^{tools -}

Pressure medium transmission, actuatable control «mg all switching elements in the respective connection

"Organ changeable, at least as three-way lines between the frontal and the

Directional control valve is formed and a cylinder space on the closing piston rod side in one of these

position, a first passage position for connecting connecting lines shut-off switching position and

binding of compensating lines between the ^{45 u} " ^{d em attached to} all compensating lines

end-face cylinder spaces with a reverse-cycle switching element in such a switching position,

Check valve having source constant mder in the sense of a stabilization of the respective

Pressure and for the simultaneous connection of the frontal cylinder spaces of the one. Compensation

Compensating lines connecting the piston rod group with the respective

opposite cylinder spaces with a pressure ⁵ ° ^the kolbeiistangcitigen cylinder spaces of the other

. loose reservoir and a second through-equalization group connecting equalizing line

Ganusscllung to connect the balancing ^{and the} , ^{Jewcils d} ' ^e piston rod, cylinder

'Lines between the front-side cylinder space of the first clearing Ausgle.chsgruppe connecting to the unpressurized reservoir / glcichslcitung with the respectively stirnseiügen ZyIminid for simultaneous connection of the initial ^{55 c} erraume the other balancing group verbmdeng! Eich! Ei.un _(i s between the piston rod ^the _u Ausgleichslcitung interconnected ii id Q k ^{stchc "b?} f ^we 8 ^{bar nd} ''

g! calibrated! ei.un _(i en between the piston rod _{and u} g

^{lateral cylinder spaces} with the source koii- stchc "' ^b ? ^w _a ^e 8 ^bar f ^nd ·. _f From." · "♦ κ.

has jammed pressure. _u I " ^{d (} ;. ^r ÖSA.-Patent 2 201912 is already a

hydraulic! ^ pressure compensation device

The hydraulic Raddruckausgleichsvorjichtung 60 wrote, in which by means of a central, driver-appropriate dem llüiiptpatuiil 1480 185 is in construction-operated multi-purpose switchgear for the purpose of a liver respects particularly simple and consequently in the stabilization of each of the frontal cylinder production cheap. In addition to the stabilization spaces, it allows for the rigging that connects a balancing group the first load level of the vehicle, the stabilizing line with the respective piston rod system and damping of vehicle vibrations and 65 term cylinder chambers of the other balancing group apart from a compensation line connecting the vehicle level and each of the also an arbitrary connection or disconnection of the piston rod-side cylinder chambers of the first vehicle suspension and an arbitrary change equal group connecting compensation line with the

3 4 _#

in each case the end-face cylinder spaces of the other. In the following, an embodiment of the

Compensation group connecting compensation line invention with reference to the drawing

are connectable to each other. This known wheel explained in more detail, in which a schematic sketch of a

pressure compensation device, however, has neither as a device according to the invention with a spring

Suspension-acting hydropneumatic accumulator, 5 approximate stabilization device is shown.

nor connecting lines between the end faces in the drawing are in pairs through rigid

and wheels 1, 2, 3 and 4 connected to the piston rod-side cylinder chambers of the wheel axles

the respective hydraulic cylinder of the individual driving vehicle, each of which has hydraulic cylinder

vehicle wheels on. It is consequently not suitable for those assigned to 5, in each of which one over

the above-mentioned task in the sense of the present- io a piston rod on the relevant wheel axle

to solve the invention. gripping double-acting piston 6 is guided.

According to a preferred embodiment of the hydraulic cylinders 5 are each articulated to the vehicle frame 7, which is only indicated according to the invention. Even if the switching, which is designed as multi-way valves, can also, conversely, attack the piston rod organs in the connecting lines between the 15 on the vehicle frame, while the cylinder hydraulic cylinders on the front and the piston rod side are supported against the wheel axle,
The hydraulic cylinders 5 are connected by the two switching positions, in which the end 6 in each case into an end cylinder space and cylinder space and the piston rod end into a piston rod end cylinder space with one another and with the hydraulic new 20 parts, which are each connected via connecting lines 8 vermatic memory or both are bindable. In the course of these connecting lines, cylinder spaces are separated from each other and from the hydraulic accumulators, each designed as multi-way valves, a third, switching elements .9 each with three switching positions, in which the connecting line 8 can be adjusted by means of the actuating tool for all switching first switching position 10 , Switch position in which each 25 Weil is released in such a way that. the end face of the end face cylinder space with the hydraulic cylinder space and the cylinder space on the piston rod side are each connected to a mechanical memory, but are separated from the piston space with one another and with a rod-side cylinder space acting as a spring. hydropneumatic accumulator 11 in connection

By such a design as a multi-way stand, - within which the liquid of one valves designed switching elements, the additional 3 ° pressurized gas cushion is acted upon, direction of the vehicle suspension in the sense of the above "In a second switching position 12 are each of the The given task on which the invention is based - the cylinder position on the face side and the piston rod side in a structurally particularly simple manner, space is achieved both from one another and from the hydro. pneumatic memory 11 separately, and in one

According to a further preferred embodiment, only the end shape of the cylinder space on the wheel pressure equalization side according to the invention is connected to the hydropneumatic device, the accumulator 11 is connected to all equalization lines, while its connection is closed multi-way switching element, through which the off with the piston rod side Cylinder space is cross-broke under equal lines in the sense of stabilization. The meaning of the individual switching methods can be connected to one another, with 40 positions being explained in more detail below, the control units assigned to each balancing group the hydraulic cylinders on the piston rod side or 2 and 4 assigned to the hydraulic cylinders are combined, which for this purpose are connected to each closed position and the two through positions 45 of a group via compensating lines 14 and 15 respectively, and in the same way the piston rod sides are also connected to change the amount of fluid The fourth cylinder chambers have switching positions that can be set by hydraulic cylinder valves via control elements at the same time on both of the same groups by means of the setting tool, compensating lines J 6 and 17 connected. In the course of each of the front-side cylinder spaces of the above-mentioned compensation lines, only the connecting compensation line and the shut-off elements 18 indicated by the piston 5 ° are arranged. .
D ^; e for connecting the hydraulic cylinders of the same line each of a group of hydraulic cylinder wheels 1 and 3 serving equalization lines 14 and the two corresponding connections 16 are via connection lines J 9 b ^ w. 20 with the two control organs cross-connecting an a's multi-way valve formed control organ stabilization lines are connected. Also 55 21 in connection, "during the alternative positions this particular arrangement according to the invention represents 15 and 17, which connect the wheels 2 and 4 to a particularly simple and practical designed hydraulic cylinder, a tive solution. Via connection lines 22 and 23 to another

Finally, in a further development of the invention, control member 24 designed as a multi-way valve can be used.

^{the 6o} assigned to the wheels on one side of the vehicle are closed. Furthermore, the beMen tax

Combine hydraulic cylinders to form a balancing group 21 and 24 each with non-return valves

be summed up. Such an arrangement is provided pressure lines 25 which are connected to a pump

from the German Auslegeschrift 1187 305 known. 26 are connected. In addition, the pe-

However, the known arrangement does not have the aforementioned control members 21 and 24 'leading away Abren features which only make it possible to provide in the ⁶ 5 flow lines 27 which open into a storage frame of the container 28 forming the subject of the invention.

the combination of features specified above, the two control members 21 and 24 each have

Invention to solve underlying problem. , four optionally adjustable switch positions on, in

Claims (4)

whose first switching position, a through position, closed position 30, which is its normal operating 29 the pump 26 connection with which the piston position is. Rod-side cylinder chambers of each group of are now also the shut-off devices 18 in Hydraulic cylinders connecting the equalizing line brought the equalizing lines in the blocking position, so 16 and 17 respectively, while the storage container 28 at 5 is assigned to a group of wheels each of the end-face cylinder spaces of the same hydraulic cylinder or all of the hydraulic groups from hydraulic cylinders connecting cylinder to rafter connecting elements between DC line 14 or 15 is connected. the wheel axles and the vehicle frame 7. In the second switching position, a closed position, the switching elements 9 are in the switching 30 are each of the frontal cylinder spaces io position 12, so by adjusting the Durcheiner Group of hydraulic cylinders connecting gear positions 29 or 31 on the control members 21 Compensating line 14 or 15 and each of the kol or 24 the respective distance between the wheel axle rod-side cylinder spaces of the same group and vehicle frame can be changed as desired, inon Hydraulic cylinders connecting balancing dem either in the frontal cylinder space 16 and 17 pumped in pressure medium both from each other and from 15 correct hydraulic cylinders the pump 26 and from the reservoir 28 and out of the cylinder chambers on the piston rod side separated. Pressure medium is drained, or vice versa. The controls are in the third switch position, a further passage In its initial position 31, the pump 26 is reversed as in FIGS. 21 and 24, generally in the closed position 30. the passage position 29 with the respective forehead 20 when, however, the actuating tool 36 by movement lateral cylinder spaces each with a group of hydraulic an actuating lever 37 in the direction of arrow A. Likzylindern connecting compensating line 14 or is actuated, the switching elements 9 are in the 15 connected, while the storage container 28 in switching position 13 and the control elements 21 and 24 in each of the cylinder spaces on the piston rod side set the switch position 32, which achieves this group of hydraulic cylinders connecting 25 that each of the end-face cylinder spaces of the Compensating line 16 or 17 is connected. connecting a group of hydraulic cylinders Finally, there is a fourth switching position 32 compensation line 14 to which the piston rods the control organs 21 and 24 are provided. In this reciprocal cylinder spaces the other group of Switching position 32 is the compensating line 17 connecting grain hydraulic cylinders from the pump 26 Mende pressure line 25 and the one to the reservoir 30 and each of the piston rod-side cylinder 28 leading drain line 27 shut off, while spaces of the first-mentioned group of hydraulic the compensating lines 14 and 16 or 15 and 17 cylinders connecting compensating line 16 to the each with stabilizing lines 33 and 34 or the end-face cylinder spaces of the other 34 and 33 are in connection, which in the group of hydraulic cylinders connecting 35 indicated manner a cross connection 35 DC line 15 is connected. This will produce. So on both control organs 21 and a stabilization of the suspension of the concerned 24 at the same time the fourth switch position 32 is set, causes the vehicle while driving. the equalizing line 14 is connected. It is obvious that the respective with the compensation line 17 and a connection to a wheel axle associated hydraulic cylinder the output line 16 can be combined with the equalizing line 40 of a group, so tion 15. that either a suspension compensation or a In the drawing, a setting tool 36 is indicated, stabilization between two wheel axles with which the switching elements 9 can follow regardless of each, by the two compensating lines because they are currently occupied by a group of hydraulic cylinders in pairs Switch position brought into their third switch position 45 or crosswise with each other at the same time 13 and also the control members 21 and 24, for which purpose a multi-way valve arrangement are used regardless of the switch that has just been taken, which is designed similarly to the control organs Position at the same time in their fourth switching position 32 21 and 24. can be brought. Are in the case of the one shown in the drawing The following is the mode of operation of the shut-off devices in the device according to the invention The embodiment of a pre-18 shown in the drawing is closed, so it can be connected in a crosswise manner direction according to the invention explained in more detail. between the compensating lines 14 and 15 scw'e In a manner similar to that in the main patent 16 and 17 by means of the control members 21 and 24 a 1 480 185 protected device can only work between wheels 3 and 4 Adjustment of the switch position 12 can be achieved at the same stabilization of the suspension, certain group of hydraulic cylinders pulls- With the help of another set of shut-off devices arranged switching elements 9 which can be the- matic memory 11 enabled the same stabilizing effect optionally also for the spring action this group of hydraulic cylinders switched off reach wheels 1 and 2,
so that between the hydraulic cylinders 60 a group by means of the respective frontal claims:
Cylinder chambers of the hydraulic cylinder 5 connecting compensation line 14 or 15 as well as the respective 1st device for hydraulic wheel pressure because the piston rod-side cylinder chambers connecting compensation for four or multi-wheel motor vehicles the compensation line 16 or 17 exclusively 65 tools with hydraulic cylinders, each of which is connected to a wheel pressure compensation, for example between the partial loads of individual wheels or groups of wheels, wheels 1 and 3 or wheels 2 and 4, takes place. transferred and the double-acting piston on-The control members 21 and 24 take this in the wise, with lockable connecting lines in each case between the end-face and the piston-rod-side cylinder space at at least some of these hydraulic cylinders and with lockable equalizing lines, each of the frontal ones Cylinder spaces or the cylinder spaces of the hydraulic cylinders on the piston rod side a balancing group with each other, which also combine the following Features: a) The blocking of the connecting lines between the front and the piston side The cylinder space of the hydraulic cylinders is carried out arbitrarily from the driver's seat, preferably by means of pressure medium transmission, actuatable switching elements, the hydraulic cylinders at least two wheels or wheel groups assigned to one another in their open position at the same time connect a hydropneumatic accumulator acting as a spring, b) the blocking of the equalizing lines between the frontal cylinder chambers or / and between the cylinder chambers of the hydraulic cylinders on the piston rod side Compensation group is also carried out arbitrarily, preferably from the driver's seat by means of pressure medium transfer, actuatable shut-off devices, c) the amount of liquid in the end-face cylinder chambers and that in the piston rod-side Cylinder chambers of the hydraulic cylinders of each balancing group is arbitrary, preferably, by one from the driver's seat by means of pressure medium transmission, actuatable control member can be changed, which is designed at least as a three-way valve and a closed position, a first passage position for connecting the compensation lines constant between the end-face cylinder chambers with a source having a check valve Pressure and for the simultaneous connection of the compensation lines between the piston rod side Cylinder spaces with a pressureless storage container and a second passage position for connection the compensating lines between the end-face cylinder spaces with the unpressurized Reservoir and for the simultaneous connection of the equalization lines between has the piston rod-side cylinder chambers with the source of constant pressure, 55 according to patent 1 480 185, characterized in that by a common setting tool (36) simultaneously all switching elements (9) in the respective connecting lines (8) between the end-side and the piston rod-side cylinder chambers in one of these connecting lines shut-off switch position (13) and one connected to all compensating lines (14, 15, 16 and 17) Multi-way switching element (control elements 21 and 24) in such a switching position (32) in which in a manner known per se in the sense of a stabilization of each of the end-face cylinder spaces the compensating line (14) connecting a compensating group to the one on the piston rod side The equalization line connecting the cylinder spaces of the other equalization trough (17) and the cylinder chambers of the first balancing group that connect each of the cylinder chambers on the piston rod side Compensation line (16) with each of the frontal cylinder spaces of the other compensation group connecting compensating line (15) are in communication with one another, are movable. 2. Apparatus according to claim 1, characterized in that the designed as multi-way valves Switching elements (9) in the connecting lines (8) between the frontal and the Piston rod-side cylinder chambers of each hydraulic cylinder (5) except for the two Switching positions (10 and 12), in each of which the front-side cylinder space and the piston rod-side Cylinder space with each other and with the hydropneumatic accumulator (11) in connection stand or both cylinder chambers from each other and from the hydropneumatic accumulator (11) are separated, a third, by means of the actuating tool (36) at the same time for all switching elements (9) have adjustable switching position (13), in each of which the end-face cylinder space but connected to the hydropneumatic accumulator (11) from the piston rod side Cylinder space is separated. 3. Device according to claims 1 or 1 and 2, characterized in that that to all Compensating lines (14, 15, 16 and 17) connected multi-way switching element through which the Compensating lines (14 and 17 or 16 and 15) cross each other in the sense of stabilization can be connected to the control organs associated with each balancing group (21 and 24) to change the amount of liquid in the front and piston rod sides Cylinder chambers is combined, which for this purpose, in addition to the closed position (30) and the two passage positions (29 and 31) for A fourth change in the amount of liquid can be performed simultaneously by means of the adjusting tool (36) both control members (21 and 24) have adjustable switching position (32), in each of which the the compensating line (14 or 15) connecting the cylinder chambers on the front side and the one on the piston rod side Compensating line (16 or 17) connecting the cylinder chambers of a group of hydraulic cylinders (5) to two corresponding ones Stabilization lines connecting crosswise connections of the two control elements (21 and 24) (33 and 34) are connected. 4. Device according to at least one of claims 1 to 3, characterized in that in In a manner known per se, each of the wheels (1 and 3 or 2 and 4) assigned to one side of the vehicle Hydraulic cylinders (5) are combined to form a balancing group. 1 sheet of drawings 109 548/273