DE3428470A1 - STEERING DEVICE FOR INTERCONNECTED WHEELSETS OF A CHASSIS, IN PARTICULAR A VEHICLE CRANE - Google Patents

Description

FRIED. ICRUPP LIMITED LIABILITY COMPANY

in food

Steering device for wheel sets connected in series of a chassis, in particular a vehicle crane

The invention relates to a common steering device for the wheel sets of a running gear , in particular a running gear for a vehicle crane, with the features of the preamble of claim 1.

In the case of chassis that can be swiveled out in pairs symmetrically to the vehicle's longitudinal axis, with a number have support beams provided by wheel sets, it is necessary that for each specific support beam position all wheelsets are set so that the wheel axles - for straight travel of the vehicle - run parallel to each other.

In order to move the wheel sets that are connected to the common steering linkage via their steering levers in the new position To be able to continue to steer, it is necessary to adjust the levers to the new driving position. For this purpose, the lever is usually assigned with several, the individual positions Provided articulation points into which the associated articulation points of the steering linkage are plugged Need to become. Such repositioning work is cumbersome and time-consuming, especially with heavy equipment and accident prone.

The invention is therefore based on the object in such a case by simplifying the

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Adjustment process to remedy the situation. The solution this task consists in the characterizing features of claim 1.

The invention primarily has the advantage that Umsteck-, remodeling work or an exchange of The parts belonging to the steering linkage are omitted, the safety for the operating crew at the Conversion of the wheel sets to the respective adjustment the support beam is considerably improved and the adjustment process can be carried out automatically will.

Advantageous embodiments of the steering device according to the invention are the subject of the claims 2 to 6.

Several exemplary embodiments of the steering linkage according to the invention are shown schematically in the drawing and explained in more detail with reference to the following description. Show it

Fig. 1 shows a support beam of a vehicle

crane in three different

Positions a to c in plan view,

Fig. 2 shows the practical implementation of a

Steering linkage of the chassis according to Fig. 1,

Fig. 3 shows a lever arrangement of the embodiment

tion according to Fig. 2 in an oblique view,

Fig. 4 is a view in the direction of

Arrow IV in Fig. 3,

_ ε: "

Fig. 5 shows another embodiment

a lever arrangement in vertical section and

6 shows a section along the line

VI-VI in Fig. 5.

On the underframe 1 of a vehicle crane, there are two at its rear end in relation to the direction of travel Support beams 2 are each articulated in a bearing 3 and (in pairs) arranged symmetrically to one another. In Fig.

For the sake of simplicity, only one of the two support beams 2 is shown, where a is the position the support beam 2 is aligned in the direction of travel, one measured at 10 ° from the longitudinal axis of the vehicle pivoted outwards: position and c shows a position pivoted outwards by about 45 °. The spread angle of the two symmetrical support beams 2 is thus twice as large.

Each of the two support girders 2 is equipped with wheel sets that can each be pivoted about a vertical axis of rotation 4 5 provided, the steering levers 6 are arranged so that they are in position a to the rear pointing as well as their assigned chassis are aligned with one another. There is a A disk-like intermediate lever which is pivotable about the axis of rotation 4 and is provided with position elements 7, 8 and 9 10 loosely arranged, which also has a pivot point 11 for the steering linkage. The points of articulation are adjacent intermediate levers each connected to one another via a rod 12, while the articulation point of the on the underframe 1 subsequent wheelset 5 is connected to a hydraulic steering cylinder 13, which in a vertical axis of rotation 15 on the underframe 1

is hinged.

In position a, all three steering levers 6 with the position elements 7 are the intermediate levers connected, for which they have corresponding counter-elements. In position b a corresponding Connection between the levers 6 and the position elements 8 of the intermediate lever 10 made after the wheel sets 5 have previously been rotated into the appropriate position. At position c the levers 6 are assigned to the position elements 9 of the intermediate levers 10 in the same way. the The piston rod 14 of the steering cylinder 13, which forms part of the steering linkage, is swiveled out at the Positions of the support beams 2 extended accordingly.

In Fig. 1, the wheel sets are in positions a to c each shown only in the straight-ahead driving position, with their wheel axles 16 parallel to one another get lost. To steer the wheel sets 5, the cylinder 13 is adjusted depending on the desired steering direction. or retracted.

In the embodiment of FIG. 2, each has Wheelset 5 'has four coaxial wheels, which are arranged on both sides of their vertical axis of rotation 4' are. At the in the same way as in the previous embodiment around the axes of rotation 4 ' pivotable intermediate levers 10 'face the longitudinal axis 17 of the vehicle and symmetrically more Lever discs 18, 19 and 20 attached, on each of which in addition to the steering linkage a steering auxiliary cylinder 21 is hinged. The steering cylinder 13 "pivotally attached to the base 1 'are with their piston rods 14 'each on the middle

Lever disk 19 articulated, which articulation points 22 for the rods 12 'leading to the lever disks 18 and 20. The pivot points of the lever disks are designed in such a way that a kinematically favorable steering behavior is achieved. The auxiliary steering cylinders 21, which are additionally used for the same purpose, are each articulated ^{at their other end to the support beam 2 1, which is not shown in FIG. 2.}

In this exemplary embodiment, the steering levers 6 ', as can best be seen from FIG. 3, are designed as double levers encompassing the intermediate levers 10' at the top and bottom. The lever 6 'is firmly connected to the bogie of the assigned wheel set, which ^{is mounted on an axle stub flanged to the support frame 2 1} , which can be seen from the flange connection 24. The intermediate lever 10 'has three notches 7', 8 'and 9 ¹ as position elements, which extend radially outward in relation to the wheelset axis of rotation 4 ^1. A downwardly angled bolt 25 is, as FIG. 4 shows, ^{mounted on the lower arm of the steering lever 6 1} in a bearing eye 26 so that it can fold away outwards and downwards and thereby the latching position in one of the recesses 7 'to 9 'releases. For this purpose, a locking pin 27, which holds it in the locked position, is pulled out. The locking and releasing of the latch 25 can take place automatically. In the released position, the underside of the lower arm of the steering lever 6 ¹ also serves as a stop to prevent the bolt from falling further.

In contrast to the previous embodiments, where the articulation points and the position elements are approximately on the same radius and the same Side of the chassis axis of rotation are, in the exemplary embodiment according to FIGS. 5 and 6, the radius is the position elements smaller than that of the steering lever. In addition, both parts are arranged approximately opposite one another. The steering lever 6 ″ has one downwards approximately opposite the articulation point 11 ″ pointing hook-shaped projection 28 / the in a slot-like curved groove 29 of the loose ^ around the steering lever 6 'mounted intermediate lever 30 engages. The intermediate lever 6 ″ is on a bogie 31 attached, which is attached to a stub axle 32 flanged to the support beam 2 about the axis of rotation 4 is pivotably mounted. The device according to this embodiment is only for designed two swivel positions of the support beam, whereby the locking takes place automatically that the cam 28 strikes one of the end stops 33 or 34 which forms the groove 29, after which a wedge-shaped bolt 35 wedges the cam 28 in its position by a servomotor 36. In its latching position, the wedge 35 divides the groove 29 into two equal sections, which are each completely filled in by the cam 28. The swivel angle is at this exemplary embodiment corresponds to the illustration according to FIG. 6 about 40.

According to the invention, it is also possible, instead of the intermediate lever, to use the steering lever with the support beam positions assigned position elements to be provided. These position elements can be also distribute it on both levers. This means that the steering device can be easily adapted to the requirements

which are provided by the different spatial conditions of a certain chassis.

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Claims (6)

Expectations 1. Steering device for at least two pairs of counter-rotating support beams one behind the other and each pivotable about a vertical axis of rotation of a chassis, in particular a vehicle crane, in which the steering levers of the wheel sets are connected to each other via a steering linkage which can be set to several specific support beam positions is, characterized in that the pivot points (11, 11 ') of the steering linkage assigned to the wheel sets (5, 5') are each located on an intermediate lever (10, 10 ') which is pivotable about the vertical axis of rotation (4, 4') and is not connected to it. , 30) are articulated, which can be connected to the steering lever (6, 6 ^l _r 6 ") in the specific support beam positions. - Steering device according to claim 1, characterized in that the connection between the steering lever (6, 6 ") and the intermediate lever (10 ¹ , 30) is made by latching. 3. Steering device according to claim 1 or 2, characterized in that the intermediate lever 10, 10 ', 30) has the position elements associated with the support beam positions. 4. Steering device according to claim 2 or 3, characterized in that the engagement by a Latch takes place, which engages in the position elements of the steering or intermediate lever. 52/84 5 * Steering device according to claim 4, characterized / that the bolt (25) hinged on the steering lever can be folded into - relative to the wheel set axis of rotation - radially outwardly widening vertical recesses (7 ¹ , 8 ', 9 ¹ ) as position elements. 6. Steering device according to one of the preceding claims , in particular according to claim 5, characterized in that the steering lever (6 ¹ ) is designed as the intermediate ^{lever (1O 1} ) above and below encompassing double lever.