DE6932893U - SUPPORTING DEVICE FOR WORK VEHICLES - Google Patents

Description

ΐ * α B. HOLZBB AUGSBURG

OS βθ

NS. 248

Augsburg, August 6, 1969

Dipl.-Ing. Karl Heinz Schmidt, Vorra, Krs.Hersbruck, house no.119

Support device for work vehicles

The innovation concerns support devices for Work vehicles with two rods which can be pivoted in a vertical plane, one of which ends essentially in this vertical plane at points on the vehicle at a certain distance from one another

are articulated and the other articulated ends carry a support leg, and their upper with respect to the distance between its articulation parts on Vehicle and its articulation point on the lower linkage or on the support leg can be controlled in length is, and with a pressure medium drive to effect this change in length. Under work vehicles are as part of the innovation crane vehicles, excavators, drilling rigs, vehicles with booms or masts or the like. to understand.

In support devices of this type, known for example from US Pat. No. 3,100,049 the upper linkage is divided by a joint, at which the latter one end of a pressure medium-operated Cylinder-piston unit is hinged, the other end of which is hinged to the vehicle in question is. The lower linkage of this known support device is a rigid link, which by buckling the upper linkage by means of the cylinder-piston unit around its located on the vehicle Articulation point upwards in the rest position or which when stretching the upper rod assembly by means of the Cylinder-piston unit around its located on the vehicle

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The pivot point is pivoted down into the working position will. This known support device has the disadvantage that the articulated by the two Ends of the two rods supported support foot only along a certain, through the length of the lower one Linkage and its articulation point on the vehicle given circular arc is movable and accordingly only can be placed on a suitable support point of the subsurface located on this circular arc. These However, the restriction is particularly noticeable in an unpleasant manner when the vehicle to be supported to start work on very uneven terrain. Furthermore, support devices of this known Art can not be used if the vehicle is only relatively narrow, limited by a vertical obstacle, for example a wall Workplace is available.

The US patent specification J5 279 622 and the Soviet zone have a somewhat larger work area Patent 27 βίβ known from support devices, which have two rods which can be pivoted in a vertical plane, one of which ends in certain Distance from each other are articulated on the vehicle. Both

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Linkage trains are essentially in the form of fluid-actuated Cylinder-piston units, the cylinders of which are within the aforementioned vertical swivel plane are articulated on the vehicle, while at the outer end of the piston rod of the lower cylinder-piston unit a support foot is attached and the piston rod of the upper cylinder piston unit at the free end of a its other end articulated on the vehicle tubular guide is articulated, within which the lower cylinder-piston unit is located. In these known support devices, the lower rods are or the pressure medium drives forming them are exposed to considerable bending stresses and must therefore be designed to be particularly strong, quite apart from the resulting frictional losses. Of such known support devices also require a lot of space in their rest position, whereby when using one type of these support devices, the ground clearance of the relevant Vehicle is significantly restricted, while the other type of these known devices also in In the rest position it survives far beyond the vehicle in question.

These disadvantages are also alleviated by a similar one known from the Soviet zone patent specification 27,555 Construction did not overcome what a support device for work vehicles relates to the two rods that can be swung out in a vertical plane has, one ends of which at a certain distance from one another located one above the other points on Articulated vehicle. The lower linkage of this known arrangement is provided with a joint, whose hinge axis is perpendicular to it and perpendicular to its horizontal pivot axis, with on the upwardly protruding end of the joint axis is the piston rod of the cylinder piston unit that is actuated by pressure medium trained upper linkage is articulated. The one support leg held by the joint The load-bearing outer part of the lower rod assembly is actuated by means of a further pressure medium Cylinder-piston unit pivotable about said joint axis.

The innovation is intended to solve the problem, the adjustability range of the support feet of Support devices for work vehicles of the type mentioned above with the greatest possible avoidance

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of bending forces to increase, with the support device in its rest position only a small Take up space and neither significantly affect the ground clearance of the vehicle in question, nor should protrude beyond the given vehicle width. In addition, the support device should have a simple construction and be inexpensive to manufacture.

This object is achieved according to the innovation in that the lower linkage contains a joint and that means are provided which bend this lower linkage with its joint upwards able or try, with the lower and the upper linkage within the vertical pivot plane are designed or arranged offset with respect to each other that the lower linkage when kinked can pass up on the upper linkage.

Compared to the known support devices mentioned at the outset, the support device according to FIG the innovation, largely without having to absorb bending forces, a significantly larger range of adjustability on, within which the support leg extends lengthways

practically an infinite number of arcs can move and determine whose radii are the respectively chosen The lengths of the two rods. The support device according to the invention also has a simple one Construction demands one in its rest position only a relatively small space and does not affect the ground clearance of the vehicle concerned, it still stands over the vehicle in question in the rest position. With all room shapes the support device according to the innovation can be the boundary divisions of the pressure medium drive or drives always correspond to a single, very specific limit position of the support device, so that complicated Pressure medium controls are avoided.

According to a further three-dimensional shape, the stated object is achieved according to the innovation in that the lower linkage at least partially from one on the one hand to the vehicle and on the other hand to that of The end of the upper linkage that is remote from the vehicle articulation point or is articulated on the support leg and is variable in length pressure medium-actuated cylinder-piston unit is formed, according to the innovation in turn result in the advantages mentioned.

In the following, the innovation is illustrated by the description of some exemplary spatial shapes with reference explained in more detail on the accompanying drawings. In the drawings show:

Fig. 1 is a schematic, perspective

Representation of a preferred three-dimensional shape of the support device according to the innovation, in which the lower linkage contains a joint, in one of several possible working positions,

Pig. 2 is a partially sectioned side view of the support device according to Fig.l in their rest position,

3 shows a schematic, perspective

Partial view of the lower rod assembly of a further innovation according to the invention Spatial shape, the other details of which correspond to the three-dimensional shape shown in FIG. 1 can,

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4 shows a schematic, perspective

Representation of yet another three-dimensional shape of the support device according to the innovation in working position,

FIG. 5 shows a partially sectioned side view of the support device according to FIG. H in the rest position.

6 shows a schematic, perspective

Representation of yet another three-dimensional shape of the support device according to the innovation,

Fig. 7 .. yet another three-dimensional shape

the support device according to the innovation in a perspective view,

8 is a schematic side view

another three-dimensional shape of the support device according to the invention in one from a variety of possible job positions,

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Pig. 9 is a schematic side view of FIG

in Pig. 8 shown support device in the rest position and

Fig. 10 is a schematic representation of the

8 and 9 shown support device according to the innovation in different working positions, from which the adjustment range of the support leg of this innovation according to the invention Spatial shape can be seen.

In the drawings, parts that correspond to one another are provided with the same reference numerals.

In the drawing fig. 1 and 2 two longitudinal spars and 2 of a vehicle frame are indicated, on which the Support device according to the innovation, for example, attached is. It should be noted that the various spatial shapes of the innovation also apply to cross members of the Vehicle frame or other parts of the vehicle can be arranged or that one or both sides of the vehicle Equipped in a symmetrical or asymmetrical arrangement with trimming devices according to the innovation

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could be. Details of the stiffening of the Longitudinal struts 1 and 2 of the vehicle frame are not shown in the drawings, as they are for the Operation of the support device according to the invention are without influence.

At the top of the * shown in Fig. 1,

Vehicle frame longitudinal spars 1 are attached to two bearing surfaces 3 and 4, on which the cylinder 5 of a cylinder-piston unit actuated by pressure medium is mounted so that it can pivot vertically. The cylinder-piston unit is designed to be double-acting and accordingly the two cylinder sides can optionally be connected to a pressure medium source or to a pressure medium outlet via pressure medium lines 6 and 7, respectively. The piston rod 8 protruding from the cylinder 5 carries a head 9 which is articulated via a horizontal journal 10 to a support foot 12 provided with a support plate 11.

At the lower edge of the frame longitudinal member 1, two bearing straps 13 and 14 are attached, their mutual Distance greater than that of the bearing brackets 3 and 4 arranged in parallel vertical pivot planes is. Between the bearing tabs 13 and 14 on the one hand and

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the journal 10 of the support foot 12 on the other hand extends a with respect to its effective Length of variable lower linkage, which in the spatial shape shown in Fig. 1 of the innovation is formed from bars parallel to each other,

which in turn are connected to one another by a joint with a horizontal pivot axis. In detail shows the lower rod assembly to each of the tabs and l4 flat bars pivoted vertically 15 and 15a, which via swivel joints 16 and 16a, respectively, with the lower journal 10 of the support foot 12 engaging flat bars 17 and 17a are connected.

As from the drawing fig. Is shown in 1 and 2, respectively, both the articulated on the vehicle frame and the rods acting on the support foot rods lever projections 18 and 19, respectively, to each of which the ends of a f druckmittelbet & temperate cylinder-piston unit hinged 20th The two cylinder-piston units of the lower linkage each bridge the joints 16 and 16a and are designed to be double-acting, as is indicated in FIG. 1 by the pressure medium lines 21 and 22. By adjusting the cylinder-piston unit 20, the opposite

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lateral angular position of the rods 15 and 17 or 15a and 17a can be changed vertically so that the distance between the articulation point of the lower linkage on the vehicle frame and the journal 10 of the support leg 12 can be adjusted practically as desired.

While in Fig. 1, the support device according to the innovation is shown in its extreme limit position, in which both the upper linkage in the form the shown pressure medium-actuated 'cylinder-piston unit as well as the lower linkage in the form of parallel Rods are brought to their greatest effective length, Fig. 2 shows the arrangement in their pivoted-in Position or its rest position, which the innovation according to the arrangement while driving the relevant Vehicle occupies. In this position, the effective length of the lower linkage is on the in Fig. 2 indicated value d brought by the two cylinder-piston units 20 by corresponding Have contracted pressure medium so far that the rods 15 and 17 or 15a and 17a of the lower linkage form a downwardly open, acute angle to each other. In addition, here is the Piston rod 8 by means of the appropriate pressure medium

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impact of the pressure medium line 6 completely into the cylinder 5 withdrawn.

FIG. 5 shows a section of a greatly simplified one Innovation according to the three-dimensional shape of the support device according to FIG. 1, in which the rod pairs 15 and 15a on the one hand or 17 and 17a on the other hand not by means of pressure medium drives, but by spring means with respect to their mutual position are adjustable. In the three-dimensional shape according to FIG. 3, the rods 15 and 15a are according to FIG The innovation extends beyond the swivel joints 16 and 16a in the direction of the rods 17 and 17a, so that the lever ends are formed, against which springs F are biased according to the innovation, which when retracting the piston rod 8 in the cylinder 5 first press the joints 16 and 16a upwards so far that the lower Linkage rod 8 with a further retraction of the piston rod finally comes into a position as it for the three-dimensional shape described above is shown in FIG.

The three-dimensional shape according to the invention according to FIGS. H and 5 of the drawings agrees with the three-dimensional shape according to FIGS. 1 and 2 of the drawings with regard to the pressure-medium-actuated cylinder-piston unit forming the upper linkage of the supporting device.

so that a more detailed description is not necessary in this regard. The head 9 of the piston rod 8 engages but not directly on the lower linkage, §f

but is located on a near the Ptützfußes 12 Lagerungsachszapfens 235 hinged, which on the corresponding Approaches 24 and 24a of mutually parallel flat rods 25 and 25a of the lower rod assembly is attached. The lower ends of the rods 25 and 25a hold the support leg 12, while their upper ends are connected via joints 26 and 26a to a pair of rods 27, 27a, which at the time was attached to the tabs 13 and 14 of the vehicle frame longitudinal member 1 is articulated.

Except about the support leg 12 and the stub axle 235 are the two parallel branches of the lower rod assembly via a further horizontal journal 28 with one another connected, which at approaches of the rods 27 and 27a is attached, and serves as a point of application for a pressure medium-actuated cylinder-piston unit 29, which again double-acting via pressure medium lines 350 and 351 is actuatable. In the three-dimensional shape according to FIGS. 4 and 5, the cylinder-piston unit 29 is via tabs hinged to the other vehicle frame longitudinal member 2. By moving the piston rod of the cylinder-piston unit 29 shows the angular position of the rods and 27a of the support leg with respect to the vehicle frame

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are changed, so that with initially assumed unchangeable position of the piston rod 8 relative to the cylinder 5, any adjustability of the distance between the support foot 12 and the articulation point of the support leg on the bearing brackets IJ> and 14 results. If the cylinder piston unit 29 is extended to its greatest length and the piston rod 8 is fully retracted into the cylinder 5, the support device assumes the position shown in FIG. 5, which is maintained during the journey. The effective length of the lower linkage is again indicated in FIG. 5 at d.

The three-dimensional forms of the innovation described so far have in common that the lower linkage consists of each Pairs of mutually parallel rod parts is formed, which in vertical planes on both sides of the cylinder-piston unit of the upper linkage can be pivoted over and in this way, for example, in the rest positions shown in Figs. 2 and 5 can be moved. Of course it can the upper linkage also have two parallel branches which are in the form of two parallel branches cylinder-piston units actuated by pressure medium

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between which the lower rod assembly can move when pivoting.

In a further three-dimensional form of the innovation, which is shown in Fig. 6, is the lower linkage formed by a pressure medium-actuated cylinder-piston unit 33, the cylinder 3 ^ on tabs 35 is articulated, which in turn are attached to the longitudinal spar 2 of the vehicle frame. the The piston rod 36 of the unit 33 engages via a joint on the support foot 12, which also has the same joint and a fork 37 with the piston rod 8 is connected. Since both the pressure fluid-operated cylinder-piston unit and the cylinder-piston unit 33 are designed to be double-acting, the support foot 12 can be in any desired, in each case a specific Position of the piston rods 8 and 36 corresponding working position are brought.

Fig. 7 of the drawings finally shows a three-dimensional shape of the innovation, in which the articulation point of the lower linkage on the same side of the vehicle frame longitudinal spar 2 and with 38

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denotes 1st. The aforementioned articulation point is formed by two opposing legs 29 of a U-profile shaped in the manner shown in FIG called U-profile runs. The head 41 of the piston rod 42 engages a journal 43 which protrudes through, for example, approximately horizontal link slots 44 in the two legs of the aforementioned U-profile. The ends of the journal 4 ^ protruding beyond the profile are each connected via link-like flat rods 45 and 45a to the journal 10 of the support foot 12, on which the head 9 of the piston rod 8 also engages. By moving the piston rod 42 of the cylinder-piston unit 40, the effective distance between the articulation point J8 and the journal 10 of the lower linkage can be changed.

The link slots 44 of the U-profile preferably run parallel to the longitudinal axis of the cylinder-piston unit 40 as shown in FIG. The support device according to the invention according to FIG. 7

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of the drawings is characterized by a particularly simple structure and also in that the pressure medium-actuated cylinder piston unit 40 is protected below the vehicle frame and in can be easily supplied with pressure medium.

With the in the drawing fig. 8, 9 and 10 shown Another spatial shape of the innovation is an upper one on the vehicle 46 in question at 47 Linkage 48 and in the same vertical plane below at 49 a lower linkage 50 each articulated pivotably within this vertical plane. The other two hinged together Ends of the two rod assemblies 48 and 50 carry the support leg 12. The lower rod assembly 50 is formed by a cylinder-piston unit actuated by pressure medium, while the upper rod assembly 48 contains a joint 51 on which the piston rod 52 of a cylinder-piston unit actuated by pressure medium 55 is articulated, the cylinder of which is in the vertical pivot plane of the two rod assemblies is pivotably articulated at 54 on the vehicle 46.

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Bel this in Figs. 8, 9 and 10 shown The three-dimensional shape of the innovation can of course be used instead of individual cylinder-piston units 50 and 53 also each cylinder-piston units 50 and 53 arranged next to one another in two parallel planes be provided or the upper rod assembly 48 consist of parallel rod parts, so that the upper linkage or the lower linkage depending on the embodiment on the other Rod pull over or between this is pivotable.

8 shows the support device according to the invention in one of a large number of possible ways Working positions in which the supporting forces from the upper and lower linkages 48 and 50, respectively be picked up axially. Fig. 9 shows the support device according to the invention in its rest or. Transport position in which it takes up only the smallest possible space and here neither beyond the vehicle external dimensions not shown in the drawings, nor the ground clearance of the vehicle.

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In Pig. 10 is the support device according to the innovation in solid lines in an upper work boundary division, in which the support forces from the two rods are each rod-axially are recorded, and also shown in dashed lines in a further working position which the supporting forces only load the lower rod assembly axially, while the upper rod assembly with his joint 51 is kinked upwards. In addition, the support device is shown in dash-dotted lines Lines shown in yet another working position, in which the latter the supporting forces on the one hand be taken up rod axially by the lower rod assembly 50, while the upper rod assembly with his joint is bent downwards in such a way that the supporting forces to be absorbed by his the support leg 12 supporting rod section and the ) Cylinder piston unit 55 added axially to the rod

will. The lower linkage 50 is so in each Working position only loaded axially with the boom. In contrast, with reference to the upper linkage 48 distinguish between three load cases:

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1. The adjustable area located on the circular arc a running between points A-A in FIG. 10 of the support foot 12, within which the support forces from both the lower linkage 50 as well as from the upper rod assembly 48 are each received rod-axially.

2. The range of adjustability b shown in hatched and dotted lines in FIG. 10, within which the supporting forces are absorbed by the lower rod assembly 50 rod axially, during the upper linkage 48 with its joint 58 is bent downward so strongly that its with the rod section connected to the support leg 12 is aligned with the cylinder-piston unit 53 and as a result, the supporting forces to be absorbed by the upper linkage via these two linkage parts 53 and 55 also added axially to the rod will.

3 · The range of adjustability cross-hatched in FIG. 10 c, within which the supporting forces from the lower rod assembly 50 are axially

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are taken, but not from the upper rod assembly 48 or the one interacting with the latter Cylinder piston unit 53, so that this adjustment range c at strong Stress is to be avoided as far as possible. However, this range of adjustability can also be used c can be very useful, especially on very uneven terrain.

In Fig. 10 in the lower of the points A, the lower limit position is indicated schematically, which is when the upper linkage 48 is adjustable. The lower limit position is schematically shown in FIG. 10 at point B indicated, which results when the supporting forces from the rod section 55 of the upper rod assembly 48 and are received together axially by the rods of the cylinder-piston unit 53.

It can therefore be seen that the different spatial shapes of the support device according to the invention with the simplest construction and with the smallest space requirement a very large range of adjustability have, which means in such a simple spatial shape

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the known support devices mentioned at the beginning is not achievable, with the innovation according to the innovation over a very large range of adjustability Support device does not have to absorb any bending forces.

Claims (9)

1. Support device for work vehicles, with two rods which can be pivoted in a vertical plane, whose one ends essentially in this vertical plane at points at a certain distance from one another Vehicle are articulated and the other articulated ends carry a support leg, and their upper with respect to the distance between its articulation point on the vehicle and its articulation point on the lower linkage or is controllably variable in length on the support leg, and with a pressure medium drive to effect this change in length, characterized in that the lower Linkage (15, 16, 17, 15a, l6a, 17a or 25, 26, 27, 25a, 26a, 27a) contains a joint (16, l6a or 26, 26a), and that means (20 or F or 29) are provided which follow this lower linkage with its joint Able to bend at the top or try, with the lower and the upper (5, 8, 9) rod assembly within the vertical pivot plane are designed or arranged offset with respect to each other that the lower linkage when bending upwards on the - 25 - ·· «·· ·« «Ot» til «•» •• β »« »t t» ii ' upper linkage can pass by (Fig. 1, 2, 3, 4, 5). 2. Support device according to claim 1, characterized in that the kinking of the lower linkage (15, 16, 17, 15a, l6a, 17a) effecting means have the form of at least one spring (F), which is connected to the lower linkage in such a way that it has its joint (16, 16a) at least in tries to bend its extended position upwards (Fig. 3). 3. Support device according to claim 1, characterized characterized in that the bending of the lower rod assembly (15, 16, 17, 15a, l6a, 17a or 25, 26, 27, 25a, 26a, 27a) means bringing about the shape of at least one cylinder-piston unit (20 or 29), by means of which the bending of the lower linkage can be controlled (Fig. 1, 2, 4, 5) 4. Support device according to claim 3, characterized in that the cylinder-piston unit of the lower Linkage train (15, l6, 17, 15a, l6a, 17a) on the one hand on its linkage section articulated on the vehicle (15, 15a) and on the other hand on its on the upper rod assembly (5, 8, 9) or the support leg (12) - 26 - articulated rod section (I7, 17a), the joint (l6, 16a) bridging, is pivotably articulated (Pig. 1, 2). 5 · Support device according to claim 3 »characterized in that the cylinder-piston unit (29) of the lower linkage (25, 26, 27, 25a, 26a, 27a) on the one hand at its joint (26, 26a) or on its between this joint and its articulation point on the vehicle located linkage section (27, 27a) and on the other hand hinged to the vehicle (at 32) each pivotable is (Fig. 4, 5). 6. Support device for work vehicles, with two rods that can be pivoted in a vertical plane, one ends of which are located essentially in this vertical plane at a certain distance from one another Places are articulated on the vehicle and the other, articulated ends of a support leg wear, and the upper one in terms of the distance between its articulation point on the vehicle and his The articulation point on the lower linkage or on the support foot is controllably variable in length, and with a pressure medium drive to bring about this change in length, characterized in that the lower rod assembly (33 or 40, 43, 45, 45a) at least partially from one - 27 - i 693289 CJ <■ J ν 1 * HA <*
fc * w * #. «Φ on the one hand on the vehicle and on the other hand at the remote from the vehicle articulation point (at 32 or 38, 39) End (37 or 9) of the upper linkage (5, 8, 37 or 5 »8, 9) or on the support foot (12) articulated, pressure medium-operated Cylinder-piston unit (33 or 4o) is formed (Fig. 6, 7, 8, 9, 10). 7. Support device according to claim 6, the lower linkage of which is articulated on the vehicle and actuated by pressure medium Having cylinder-piston unit, thereby characterized in that a v beneinheit (4θ) and one with its other end at the upper linkage (5, 6, 8, 9) or link (45, 45a) articulated on the support leg (12) articulated point (43) of the lower linkage at a distance below the vehicle articulation point (at 3, 4) of the upper linkage attached or formed on the vehicle, in the aforementioned vertical pivot plane essentially ho- ' rizontally lying guide (44) is guided (Fig. 7) 8. Support device according to one of claims 1 to 7, characterized in that the upper rod assembly of a load the change in distance between its articulation point on the vehicle and its articulation point on the lower rod assembly or support foot - 28 - -tu CC ί acting pressure-actuated cylinder-piston unit (5, β, 8, 9 or 5, 6, 8, 37) is formed, 9. Support device according to one of claims 1 or 3 to 8, characterized in that the pressure medium-operated Cylinder-piston unit (5, 8) of the upper rod assembly and / or the pressure medium-actuated Cylinder piston unit (20 or J53 or 29 or 40) of the lower linkage is continuously adjustable and double-acting. - 29 -