EP0721049B1 - Device for compensating unevenness of the ground - Google Patents

Abstract

The ladder is turned by a bogie with a first ring mount on a vertical pivot axle (A). The first and second (6) ring mount move in relation to each other on an axis (S) at right angles to the pivot axis. The second ring mount is positioned directly above the substructure or in a platform (3) on the substructure. Above the second ring mount and beneath the first ring mount is a bearing plate (16,21) each of which is reinforced by tubular reinforcement frames (18,22).

Description

The invention relates to a bogie with a device for terrain compensation, with one around essentially vertical axis of rotation rotatable first slewing ring with a second slewing ring and with a pivot axis, by means of first and second slewing rings at right angles to Axis of rotation aligned axis of rotation aligned pivot axis are pivotable relative to each other.

For vehicles with aerial ladders, such as fire engines or also aerial rescue or aerial work vehicles, it is required that the turntable ladder is in the balance, i.e. the rungs are aligned horizontally, so that it can be committed safely. this is not secured when such a vehicle with an aerial ladder stands in an uneven terrain and the aerial ladder in in a direction that is not the fall line corresponds to the terrain, but to this an angle includes. In this case, the rungs of the The aerial ladder is not horizontal, but inclined to the horizontal.

There have already been several suggestions for terrain compensation made to balance the turntable ladder to get. So a swivel plate drive was proposed in which a plate relative to the substructure of the vehicle fixed at three points and over two points is adjustable in height so that it is independent of the Alignment of the base always in a horizontal position can be brought. This solution is expensive. The spindle drives commonly used have one very big game while a spindle free design is associated with considerable effort.

Alternatively, swash plates have already been proposed rotatable against each other via crowned teeth are and about a wobble relative to each other a compensation of the vehicle slope or the terrain slope can effect. Such a terrain compensation is very expensive due to the crowned toothing.

EP 0 565 833 A1 shows a bogie with a Device for the vertical alignment of a vertical axis one with a base can be rotated and tilted connected construction, with an upper and a lower slewing ring. In a first embodiment a pivoting of the two slewing rings over one Rocker over a central swivel axis in the area the diameter of the slewing rings is arranged. In a the second embodiment, there is a vertical alignment a vertical axis of an upper slewing ring relative to one not vertically standing lower slewing ring. By moving of the upper slewing ring are those with this connected sliding blocks in opposite to that lower turntable connected link guides an actuating cylinder arranged. Both versions are a large height and an extremely limited angle of inclination of the slewing rings together.

The invention is therefore based on the object of a bogie with a device for terrain compensation create that with a minimized height as possible large relative inclination of the slewing rings.

According to the invention, the stated object is achieved by a bogie with a device for terrain compensation with the Features of claim 1 solved.

By providing a swivel linkage on one side only for pivoting about an axis of rotation reaches the Invention with a small height a relatively large Swivel angle in particular an inclination compensation from deepest swivel of a (deepest) swivel position with 0 ° to a maximum that preferably in the The order of 5 to 10, especially 7 °. There is an absolute balance of the horizontal Upright axis and thus with a turntable ladder itself or their rungs, can be achieved so that this are actually aligned horizontally in "the Scale ". Usually the inclination adjustment made such that an absolute compensation of the vertical bogie swivel axis is reached, this is oriented vertically; Furthermore but there is the possibility of an additional ladder inclination by controlled skewing the essentially vertical bogie swivel axis, i.e. on Raise the first slewing ring over the second Slewing ring beyond the horizontal, so that the aerial ladder can be inclined downwards. An essential one constructive advantage of the invention is that conventional elements, especially standard slewing rings can be used and no custom-made products are necessary as they are in the prior art for example due to the need for spherical gears required are.

The second or basic slewing ring can be directly above the Substructure and thus largely in a podium covering of the same be sunk so that its top edge and possibly the lower edge of one on it and the basic mounting plate connected to it can be arranged above the podium since the second slewing ring and, if necessary, the base mounting plate no vertical or inclination movements the podium and the substructure. In particular is still a main control center for an aerial ladder to be placed very low on the bogie as the main control seat then possibly relative to the podium makes only a slight downward movement.

In a preferred embodiment it is provided that the second slewing ring arranged directly above the substructure is, in particular the second slewing ring in one the podium located in the substructure. Training provide that above the second slewing ring and below the first turntable a mounting plate are arranged and in particular that the mounting plates stiffened from tube by reinforcement frame are and that the reinforcement frame of the first mounting plate within the reinforcement frame of a basic mounting plate is arranged, with the pivot axis for the slope compensation itself through parts of the Frame extends. The fact that the reinforcement frame of Interlocking mounting plates will be a low one Height reached. This is still supported by that the pivot linkage is only one-sided and an inclination compensation only from the (lowest) Swivel position with 0 ° up to a maximum, preferably in the order of 5 to 10, in particular at 7 °.

Developments of the invention provide that opposite the tilt axis arranged an inclination is, in particular the inclination adjustment has a double-acting hydraulic cylinder. In an extremely preferred embodiment, that both slewing rings together at the same angle, but are pivotable against each other.

Figur 1

eine schematische Darstellung der wesentlichen Elemente der erfindungsgemäßen Vorrichtung zum Terrainausgleich im vertikalen Längsschnitt;

Figur 2

eine schematische Draufsicht auf Montageplatten und ersten Drehkranz gemäß den Pfeilen II-II der Figur 1;

Figur 3

einen schematischen Schnitt entsprechend Figur 1 durch Montageplatten und Neigungsverstellung - unter Weglassung sonstiger Teile wie der Drehkränze etc. - mit einem Schwenkwinkel der Neigungsverstellung ungleich 0°.

Further advantages and features of the invention result from the claims and from the following description, in which an embodiment of the inventive device for terrain compensation is explained in detail with reference to the drawing. It shows:

Figure 1

a schematic representation of the essential elements of the inventive device for terrain compensation in vertical longitudinal section;

Figure 2

is a schematic plan view of mounting plates and first slewing ring according to the arrows II-II of Figure 1;

Figure 3

a schematic section corresponding to Figure 1 through mounting plates and inclination adjustment - omitting other parts such as the slewing rings etc. - with a swivel angle of the inclination adjustment not equal to 0 °.

In Figure 1, the inventive device for Terrain compensation shown schematically. On one Substructure 2, such as a chassis base frame, for example of a fire service vehicle, is more common Way arranged a podium 3, which consists of a frame structure exists on which walk-on panels 4 rest. There is a circular recess 7 in the podium 3, in which one, here referred to as the second slewing ring, Slewing ring 6 is embedded. The slewing ring 6 consists of an outer, undermount ring 8, one opposite this pivotable or rotatable ring 9 and between these only indicated schematically here Bearing elements 11, such as a single or a double Ball bearings etc., with which the rings 8, 9 radially and are guided axially. The inner ring 9 is with a Provide internal toothing 12 on which a in the substructure 2 arranged swivel drive 13 with a pinion 14 for Swiveling of the ring 9 attacks. With the quarter turn actuator 13 can be an electrical or a act hydraulic drive, which is a pivoting of the Inner ring 9 allows in any direction by at least 180 °.

With the inner ring of the slewing ring 6 is a base mounting plate 16 connected, the middle of an opening 17 has. The base mounting plate 16 is by a stiffened on its frame 18 made of square tube. On the base mounting plate 16 is surrounded by another mounting plate 21 on the frame 18. The Mounting plate 21 is also through a frame 22nd stiffened, the frame 22 largely within of the frame 18.

The mounting plate 21 is on the frame 22, 18 on one Side, seen here in the front area in the direction of travel, pivotable in the vertical direction relative to the Basic mounting plate articulated, the pivot axis S extends perpendicular to the main axis of rotation A.

About this pivot axis S, the plates 16, 21 are relative pivotable relative to one another by means of an inclination adjustment 23. The tilt adjustment 23 can for example formed by a double-acting hydraulic cylinder his.

Another sits on the mounting plate 21, here as first slewing ring 24 designated slewing ring - because it known turntable of a turntable ladder vehicle corresponds. This carries the bogie 26 for one Turntable ladder, consisting of a ladder set and if necessary a carriage that is essentially horizontal Raising axis R can be pivoted in a manner known per se is.

An inner ring 27 of the slewing ring 24 is fixed to the Mounting plate 21 connected and supports via bearing elements 28 an outer ring 29 with which the bogie 26 is fixed connected is. The inner ring 27 is with an internal toothing 31 provided, in turn, a swivel drive 32 engages with a pinion 33. The swivel drive 32 is firmly connected to the bogie 26. Electrical and / or hydraulic lines for the drive 32 are via a rotary union 34 from the base 2 to Drive 32 feasible.

The terrain compensation device according to the invention now works as follows: the device for Terrain compensation is used when the substructure 2 is not in the balance, but on an inclined Area. In this case, after, if necessary the vehicle that supports the substructure 2 is known Was supported, the ladder set if that Vehicle is uphill to a small compensation area erected. Then the basic mounting plate 16 pivoted relative to the base 2 so that the inclination adjustment device 23 in a deepest Position, ie in a "downhill position" of the total inclination comes into position. As a rule, the shortest path from the starting position to the above described operating position selected. Either on that or in an advantageous manner simultaneously with the Swiveling the base mounting plate 16 relative to the Substructure 2 is also preferably about the same speed the bogie 26 over the turntable 24 opposite the Mounting plate 21 by the same swivel angle, but in pivoted in the opposite direction. This will achieved that between substructure 2 and alignment of the bogie 26 and thus carried by it Head, at least as a result, no change in swivel angle during the terrain balancing process. Then the inclination of the mounting plate is adjusted 21 and the turntable 24 by means of the inclination adjustment device 23 until the bogie pivot axis A aligned exactly vertically, i.e. absolutely balanced is, even if the axis of symmetry of the second slewing ring 6 does not extend vertically. After graduation this leveling is then the upright axis for the ladder on the bogie 26 in any case horizontally and is therefore absolutely balanced, so it says in any case, the ladder is not at an angle, its rungs are rather horizontal in any case, regardless of the ladder inclination and regardless of the rest Relative angle between base mounting plate 16 and mounting plate 21. As a rule, the mounting plate 21 through the inclination adjustment device 23 compared to the Base mounting plate 16 are pivoted that the bogie pivot axis A for all subsequent ladder maneuvers stands vertically. But this does not have to be the case. At largely horizontally positioned vehicle can Tilt adjustment device preferably laterally or to the rear also to an additional negative ladder inclination, i.e. alignment of the ladder at an angle can be used below. For example, this is necessary when working on embankments, such as in river areas will or access to a house from one position secured above it on a mountain slope shall be.

Claims (10)

1. Bogie having a device for ground unevenness compensation, with a first turntable (24) rotatable about a substantially vertical rotation axis (A), with a second turntable and with a pivot axis (S) oriented at right angles to the rotation axis (A), the first and second turntables (24, 6) being pivotable relative to one another about the pivot axis (S), characterized in that the pivot axis (S) is located on one side of the turntables (24, 6).
2. Bogie according to claim 1, characterized in that the second turntable (6) is located immediately above an underframe (2).
3. Bogie according to claim 1 or 2, characterized in that the second turntable (6) is inserted in a podium (3) located on an underframe (2).
4. Bogie according to one of the preceding claims, characterized in that a mounting plate (16, 21) is placed above the second turntable (6) and below the first turntable (24).
5. Bogie according to claim 4, characterized in that the mounting plates are stiffened by tubular reinforcing frames (18, 22).
6. Bogie according to claim 5, characterized in that the reinforcing frame (22) of the first mounting plate (21) is located within the reinforcing frame (18) of a base mounting plate (16).
7. Bogie according to claim 5 or 6, characterized in that the pivoting axis (S) for slope compensation extends through parts of the frames (18, 22).
8. Bogie according to one of the preceding claims, characterized in that a slope adjustment device (23) is positioned facing the pivoting axis (S).
9. Bogie according to claim 8, characterized in that the slope adjustment device (23) has a double-acting hydraulic cylinder.
10. Bogie according to one of the preceding claims, characterized in that both turntables (6, 24) are pivotable jointly about the same angle, but against one another.

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