DE102010045231A1 - Ramp for driving flat-bed trailer and lorry for transportation of construction machine and agricultural machine, has crossbars arranged within frame, where intermediate plates are edged between crossbars in longitudinal direction - Google Patents

Abstract

The ramp has a frame (10) and crossbars (20), where the crossbars are arranged within the frame. Intermediate plates (30) are edged between the crossbars in a longitudinal direction. The crossbars are formed from a downward open channel, and the intermediate plates are bent or edged in an alternative V-shape. The intermediate plates are locked and aligned with the frame and the crossbars. A ramp wedge (40) is locked by a closed plate (41) in upper and/or lower sides.

Description

FIELD OF THE INVENTION

The present invention relates to a ramp to overcome height differences

BACKGROUND OF THE INVENTION

For the transport of construction machinery or other vehicles that are not approved for use on the road, special trailers are used - if they are heavy vehicles. These trailers are referred to as low loader. For the driveway on a low loader usually hinged ramps or ramps are attached to the end. When driving the ramps are folded up and for the driveway of a vehicle they can be moved so that a vehicle can drive over the ramps on the trailer or even a truck.

Ramps are known from the prior art, which are made of - mostly drawn - profiles. The profiles used usually have a U-shape or a trapezoidal shape and are connected by welding. The stability of these ramps is mostly due to the use of profiles with a material thickness that is above the thickness of sheets. A disadvantage of such ramps is that they have a high weight for a sufficient stability in heavy vehicles.

So revealed the DE 9317503 U1 a ramp for low loader, which has a ramp body of a longitudinally extending, shell side closed box girder, on the upper side of the pad is applied directly. Preferably, for the box frame, the use of U-profiles opened to the bottom. As a topping of the ramp, wooden bulbs are proposed.

For the calculation of the payload of a trailer or even of a truck, the unladen weight of the vehicle shall be deducted from the total authorized mass. Therefore, to achieve increased payload, it is desirable to reduce the curb weight of the vehicle. This can be achieved, inter alia, that in the case of add-on parts of a vehicle such as, for example, a loading ramp, attention is paid to the lowest possible weight.

Therefore, there is a need for ramps, which provide maximum stability at the lowest possible weight.

BRIEF DESCRIPTION OF THE INVENTION

It is an object of the present invention to provide a ramp, which is suitable for a low weight to take a high load.

According to the invention, a ramp is provided for overcoming differences in height, wherein the ramp has a frame and transverse struts are arranged within the frame and between the transverse struts longitudinally folded sheets are arranged, which are also referred to as intermediate plates.

In a ramp according to the present disclosure, it is provided that the frame and the webs are also folded in the transverse direction of a metal sheet, wherein the transverse struts are formed from downwardly open U-profiles.

For the sheets, which are arranged between the transverse struts, it is provided that they are angled or folded in an alternating V-shape. The folded sheets preferably finish flush with the frame and the transverse struts.

To make a firm connection between the folded sheet metal ends of the intermediate plates and the adjacent parts, these are welded together or are screwed.

An approach ramp according to the present disclosure, in one embodiment, has a wedge shape at one end of the ramp for resting flush on the ground, or is wedge-shaped at that end, thus forming a ramp wedge. The ramp wedge may further be closed at the top and / or bottom with a sheet.

It is further provided that means for connecting the ramp to a vehicle or trailer are attached to the ramp on the opposite end to the ramp wedge, wherein the means may be selected, inter alia, that a pivoting of the ramp is possible. A pivoting of the ramp can be done by means of a hydraulic arm or a pneumatic.

In order to ensure that the drive-up ramp does not change its position during driving, it is provided that further receptacles for locking the ramp in a driving and / or loading position are mounted on the ramp.

DETAILED DESCRIPTION OF THE INVENTION

The present disclosure describes a ramp, which is suitable to carry large weights, but it has only a low weight. The low weight is due to the fact that the ramp can ultimately be folded from a metal sheet.

The high stability of the ramp is due to the special arrangement of different folded components, such as frames, cross braces and intermediate plates. It was surprising that a ramp according to the present disclosure under a load of 12,500 kg showed a deflection of only 15 mm. This was not to be expected since the parts of the ramps have significantly thinner material thicknesses than is the case with the ramps of the prior art.

Since a ramp is designed according to this disclosure for loads up to 10,000 kg, this still has enough safety reserves. The relationship between the maximum axle load and the maximum wheel load of the vehicle, which is to ascend via the ramp to a vehicle or trailer, is shown in Table 1 below. Table 1: Load table for a ramp designed for a maximum load of 10 t Max. Axle load (kg) Max. Wheel load (kg) 1 9000 4500 2 10,000 5000 3 * 12,500 6250 4 * 15,000 7500 5 * 20,000 * for a wheelbase (drive length)> 2000 mmm

For a vehicle with a total mass of 40 t, a two-axle vehicle will have an axle load of 20 t. The axle load is divided into a wheel load of 10 t each. Since a ramp according to the invention is designed for a maximum load of 10 t, it follows that two ramps - for multi-lane vehicles as usual - can drive up an at least two-axle vehicle with a total mass of 40 t.

Thus, a light ramp according to the disclosure enables the driving of heavy construction machinery on a trailer or a truck, which can be moved in the usual traffic without special permission.

DESCRIPTION OF THE FIGURES

The invention is further illustrated by figures, without being limited to these.

It shows:

1 Perspective view of the ramp

2A -C side and side view and representation of the specified cutting planes

3 Schematic representation of the wheel loads of an approaching vehicle

1 shows a perspective view of the ramp 70 , Here is the arrangement of frames 10 , Cross struts 20 and intermediate plates 30 to recognize. The cross struts 20 Divide the frame into several segments, which of the folded sheet metal intermediate plates 30 fill out.

At one end of the ramp 70 is the ramp wedge 40 with a final sheet 41 to see, which gives the ramp wedge extra stability. At the other end of the ramp 70 are means for pivotal connection 50 the ramp 70 arranged with a vehicle or trailer.

In 2A -C are up and side view and the representation of the specified cutting planes shown. So shows 2A a view of a ramp 70 according to the disclosure. It is the frame 10 , the cross struts 20 and the intermediate plates 30 to see. Again, at one end of the ramp 70 the ramp wedge 40 and at the other end the means for connecting the ramp 50 to see.

2 B shows a section through the ramp 70 in the in 2A specified section plane BB. It is within the frame 10 the angled or V-shaped folded intermediate sheet 30 to see. In addition, a supervision on a cross strut takes place 20 ,

2C shows a side view of the ramp 70 , where essentially the frame 10 and the underlying designed as a U-profile cross struts 20 you can see. At one end is the ramp wedge 40 and at the opposite end are the means for connection to a trailer or truck 50 arranged.

In 3 is a schematic representation of the wheel loads of an approaching vehicle 60 on a trailer or truck 80 over a ramp 70 shown. The point of application of the load per wheel, or for tracked vehicles per sprocket, is indicated by the arrows and the indication m _{G, Rad} .

As can be seen from Table 1 above, the folded out of a sheet and thus extremely light ramp is suitable to drive vehicles with a total mass of 40 t via two ramps on a trailer or a truck. Thus, a ramp according to the present disclosure is also suitable for heavy construction or off-highway agricultural machinery to allow access to a trailer or truck for transport to another location.

LIST OF REFERENCE NUMBERS

10

frame

20

crossmember

30

intermediate plate

40

ramp wedge

41

sheet

50

Means for connection to the ramp

60

vehicle

70

ramp

80

Trailer or truck

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 9317503 U1 [0004]

Claims (13)

An access ramp to overcome height differences, this one a frame ( 10 ), characterized in that within the frame ( 10 ) Cross struts ( 20 ) are arranged, wherein between the transverse struts ( 20 ) longitudinally folded sheets as intermediate plates ( 30 ) are arranged. Loading ramp according to claim 1, characterized in that the frame ( 10 ) and the transverse struts ( 20 ) are also folded from a sheet. Loading ramp according to one of claims 1 or 2, characterized in that the transverse struts ( 20 ) are formed from a downwardly open U-profile. Loading ramp according to one of the preceding claims, characterized in that the intermediate plates ( 30 ) are angled or folded in an alternating V-shape. Loading ramp according to one of the preceding claims, characterized in that the intermediate plates ( 30 ) flush with the frame ( 10 ) and the transverse struts ( 20 ) to lock. Loading ramp according to one of the preceding claims, characterized in that folded sheet metal ends are welded or screwed for connection to adjacent parts. Loading ramp according to one of the preceding claims, characterized in that one end of the ramp is flattened in a wedge-shaped manner to lie flush on the ground and thus has a ramp wedge ( 40 ). Loading ramp according to one of the preceding claims, characterized in that the ramp wedge ( 40 ) at the top and / or bottom with a metal sheet ( 41 ) is closed. Loading ramp according to one of the preceding claims, characterized in that on the ramp wedge ( 40 ) opposite end means for connecting the ramp ( 50 ) with a vehicle or trailer ( 80 ) are mounted. Loading ramp according to claim 9, characterized in that the means are selected so that a pivoting of the ramp is possible. Loading ramp according to one of the preceding claims, characterized in that the ramp by means of a hydraulic arm or a pneumatic ( 70 ) is pivotable. Loading ramp according to one of the preceding claims, characterized in that further receptacles for the locking of the ramp are mounted in a driving and / or loading position on the ramp. Loading ramp according to one of the preceding claims, characterized in that the entire ramp is folded from a metal sheet.

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