DE202023101673U1 - Lifting platform for a vehicle - Google Patents

Abstract

Lifting platform (1) for a vehicle
- a base with which the lifting platform (1) can be supported on a surface,
- a base body (4) which can be raised and lowered relative to the standing surface by means of a lifting device, and
- Two walkways (7) that can be driven on by the vehicle and are arranged on opposite sides of the base body (4), each walkway (7)
- a drive-on area over which the vehicle can drive in the drive-on direction (3),
- A first wheel base (15) which, in the operational state, accommodates a first wheel (2) of the vehicle which has been driven on, and
- has a second wheel base (16) which, in the operational state, accommodates a second wheel (2) of the vehicle that has been driven on,
characterized in that
each walkway (7)
- A first driving plane (18) with a first roadway level (19) and
- has a second driving level (20) behind it in the drive-on direction (3) with a second driving level (21) which is higher than the first driving level (19), at least the second wheel base (16) in the region of the second driving level (20) is positioned.

Description

The invention relates to a lifting platform for a vehicle having the features of the preamble of claim 1.

STATE OF THE ART

From the document DE 20 2008 009 767 U1 a lifting platform for a vehicle is known in which the vehicle can drive onto walkways via ramps. The walkways are arranged on a scissor frame, which can be set up by filling an air bag. In order to be able to raise the vehicle either wheel-free or as a whole, the lifting platform has a lifting frame and a lifting plate, it being possible for the lifting plate to be coupled to or decoupled from the lifting frame. In the coupled state, when the air bellows is filled with the lifting plate, the lifting frame and the walkways arranged on it are also raised. Accordingly, the vehicle is raised as a whole in this state. In the decoupled state, only the lifting plate is raised, which comes into contact with the underbody of the vehicle outside the wheels and wheel axles at contact points, whereby the vehicle is lifted wheel-free.

From the document CN 215 854 893 U1 a lifting platform is also known in which a vehicle can drive onto walkways via ramps. A lifting mechanism is provided in the center of each walkway. Viewed in the longitudinal direction of the vehicle, the lifting mechanism engages approximately in the middle between the two wheels of the vehicle, so that the vehicle can be lifted wheel-free relative to the walkways. The lifting mechanism is located directly on the runway of the walkway and is slightly higher in comparison. Correspondingly, wedge-like ramps are provided so that the vehicle can easily drive over the lifting mechanisms when driving onto the ramp. A similar lifting platform is from the document U.S. 2015 129 820 A1 known.

DISCLOSURE OF THE INVENTION

The object of the invention is to provide a lifting platform which is suitable for lifting various vehicles and, in particular, particularly low-lying vehicles.

The object according to the invention is achieved by a lifting platform with the features of independent claim 1.

The invention is based on the finding that in the case of the lifting platforms known from the prior art, the connection between the minimum height of the base body of the lifting platform and the resulting necessary ground clearance of the vehicles to be lifted has not yet been technically solved, especially if the minimum height of the base body is in the range of 130 mm or more plus the installation height of possible support arms, which is typically in the range of 40 mm. i.e. the lifting platforms known from the prior art are typically only suitable for lifting vehicles with a ground clearance of at least 170 mm. In the case of a lifting platform according to the invention, this limitation is solved by ultimately introducing an additional driving level, so that a vehicle can drive onto the lifting platform over several steps with relatively small height differences.

• - Die erste (unterste) Ebene, die die Nullpunkt definiert, ist eine Standfläche der Hebebühne, mit der diese auf einem Untergrund aufsteht.
• - Die zweite Ebene ist das Fahrebene, die durch Fahrspuren der Hebebühne definiert ist, auf welchen das Fahrzeug auf den Rädern stehend angehoben wird.

In the case of a lifting platform according to the state of the art, there are, inter alia, the following levels:

• - The first (bottom) level, which defines the zero point, is a base for the lift, with which it stands on a base.
• - The second level is the driving level, which is defined by lanes of the lift on which the vehicle is lifted standing on its wheels.

The difference in height between the driving level and the standing area determines the length of the necessary drive-on ramps over which a vehicle can drive onto the lanes of the lifting platform. These drive-on ramps usually fulfill a double function: In addition to enabling the vehicle to drive on, the drive-on ramps typically serve as at least 10 cm increased roll-off protection for the wheels of the vehicle to be lifted. For this purpose, the drive-on ramps swivel into an approximately vertical position when the lifting platform is raised, with part of the drive-on ramps projecting up to approx. 10 cm above the driving level as roll-off protection. The larger part of the ramp protrudes downwards. Since the distance to the ground is limited at maximum lift, the maximum length of the ramps beyond the lifting platform is also limited accordingly. Specifically, the maximum length is typically around 60 cm. This limitation ultimately limits the maximum possible height of the driving level compared to the ground on which the lifting platform stands.

In special cases, the maximum possible length of the drive-on ramps can even be limited to approx. 35 cm. This is e.g. This is the case, for example, when the lifting platform is also to be used as a workpiece carrier.

• - Eine dritte Ebene ist durch die Höhe des Grundkörpers im abgesenkten Zustand der Hebebühne über der Standfläche definiert. Die Höhe hängt insbesondere von technischen Eigenschaften wie der Tragkraft, der gewünschten Hubhöhe und dem verwendeten Hubantrieb ab. Die Erfindung bezieht sich insbesondere auf solche Hebebühnen, bei denen die Höhe des Grundkörpers im eingefahrenen Zustand mindestens 12 cm beträgt. Dies ist z. B. für pneumatisch angetriebene Scherenhubbühne mit einem Luftbalg mit drei in Hubrichtung übereinander angeordneten Kammern typisch.
• - Eine vierte Ebene ist durch die Höhe der Oberkante der auf dem Grundkörper angeordneten Tragarme, welche ein radfreies Heben des Fahrzeugs ermöglichen, gegenüber der dritten Ebene definiert. Die Höhe der Tragarme über dem Grundkörper liegt technisch bedingt bei über 20 mm und meist bei ca. 40 mm.

In addition, the following further levels are relevant for the limited application of the lifting platforms known from the prior art on vehicles with a specified ground clearance:

• - A third level is defined by the height of the base body when the lift is lowered above the standing area. The height depends in particular on technical properties such as the load capacity, the desired lifting height and the lifting drive used. The invention relates in particular to such lifting platforms in which the height of the base body when retracted is at least 12 cm. This is e.g. B. for pneumatically driven scissor lift with an air bellows with three chambers arranged one above the other in the lifting direction.
• - A fourth level is defined by the height of the upper edge of the support arms arranged on the base body, which allow wheel-free lifting of the vehicle, compared to the third level. For technical reasons, the height of the support arms above the base body is over 20 mm and usually around 40 mm.

The height difference between the fourth level and the driving level is particularly relevant, ie the sum of the height difference between the driving level and the third level and the height difference between the fourth level and the third level. The resulting difference in height corresponds to the minimum required ground clearance that a vehicle must have in order to be picked up by the lifting platform.

For vehicles with little ground clearance, either the drive-on height, i. H. the height difference between the ground and the driving level, which is bridged by the access ramp, or the height difference between the upper edge of the support arms and the driving level, can be a problem if one of these height differences is greater than 90 mm.

A conflict arises here because the height of the support arms cannot be reduced in relation to the base body and the height of the driving level cannot be increased indefinitely due to the limited length of the access ramps.

The previously mentioned levels can also be found in the solution according to the invention.

The inventive solution to the conflict mentioned above lies in the introduction of a further driving level. i.e. there is not just one driving level. Rather, the gangways of the lifting platform according to the invention comprise a first driving plane with a first roadway level and a second driving plane with a second roadway level, which is higher than the first roadway level. At least one of the two wheel bases, in the area of which the wheels of the vehicle to be lifted are positioned for the lifting process, is in the area of the second driving plane with the second roadway level.

A lifting platform according to the invention comprises a base with which the lifting platform can be supported on a surface and in particular can stand up on it. In addition, the lifting platform includes a base body that can be raised and lowered relative to the standing surface by means of a lifting device. In principle, the lifting device can be based on any type of lifting mechanism. To name just a few examples, it may be e.g. B. be a motor or pneumatic lifting mechanism and in particular a pneumatic scissor lift mechanism.

The lifting platform includes two walkways onto which a vehicle can drive. The walkways are arranged on opposite sides of the base body. The distance between the walkways seen transversely to the drive-on direction can be fixed and correspond to a typical wheelbase of vehicles. However, the distance between the walkways can also be flexibly adjusted (at least to a certain extent).

Each walkway includes a drive-on area over which the vehicle can drive in the drive-on direction. For example, the drive-on area can be designed as a drive-on ramp.

In addition, each walkway includes a first wheel base that, when ready for operation, accommodates a first wheel of the vehicle that has been driven on. The ready-to-operate state is understood to be the state in which a vehicle that has been driven on can be raised or lowered. In addition, each walkway includes a second wheel base, which accommodates a second wheel of the vehicle when it is in the operational state. i.e. to raise the vehicle, the vehicle is positioned on the walkways in such a way that the first pair of wheels is positioned in the area of the first wheel base and the second pair of wheels is positioned in the area of the second wheel base.

According to the invention, at least the second wheel base of each walkway is in the area of the second drive level of the walkway with the second driveway level, which is higher than the standing surface compared to the first driveway level of the first drive level of the driveway. In addition, the second wheel base can also be located in the area of the second driving plane with the second roadway level.

In other words, a vehicle reaches the level from which it can ultimately be raised in two steps: First, it drives from the level of the standing area via the ramp area to the first lane level of the first driving level. When driving further in the direction of the operational position, the vehicle drives with at least one pair of wheels (optionally also with both pairs of wheels) in the area of the second driving level with the second roadway level, which is even higher than the first roadway level compared to the standing area. In a way, the two-stage drive-on acts as a kind of extension of the drive-on ramp. In the case of the lifting platform according to the invention, the minimum required ground clearance of a vehicle is correspondingly lower than in the case of the lifting platforms known from the prior art, without the longitudinal extension of the lifting platform being significantly increased or its lifting height being impaired.

The transition between the first driving level and the second driving level can be configured as desired. A ramp can be provided between the two driving levels for a particularly easy transition between the two driving levels with the different driving levels. If there is a small height difference in the range of a few cm between the first level of the roadway and the second level of the roadway, the transition can also be in the form of a step, which the vehicle can easily drive over.

There is an intermediate area between the two wheel bases of each walkway. When driving onto the walkways, the vehicle drives with a pair of wheels first over the first wheel base and then over the intermediate areas of the walkways until the pair of wheels finally reaches the area of the second wheel base, whereby the operational state is established in which the vehicle is lifted from the lifting platform can be. The intermediate area can in particular be positioned in such a way that the pair of wheels from the first travel level reaches the intermediate area before the pair of wheels passes the area of the base body of the lifting platform.

The intermediate area has an intermediate level. The intermediate level of the intermediate area can be identical to the first or second roadway level. The intermediate area can also have a different level, e.g. B. an intermediate level lying between the first and second roadway level. It is advantageous if the level of the intermediate area in relation to the standing area is higher than the first roadway level. The level of the intermediate area can e.g. B. be identical to the second road level.

In order to be able to accommodate longer vehicles as well, the first wheelbase can in particular be made longer than the second wheelbase. The first wheel base can extend from an area of the first driving level to an area of the second driving level. i.e. the first wheelbase ultimately includes areas with different road levels. The lifting platform is therefore not only in an operational state when the first pair of wheels is picked up by an area of the first wheelbase on the second roadway level, but the wheel pair can also be picked up by an area of the first wheelbase on the first roadway level. This can be the case especially with longer vehicles. i.e. in such longer vehicles, the first pair of wheels is in the operational state at the level of the first roadway level, while the second pair of wheels is at the level of the second roadway level. In the case of vehicles with a greater distance between the pairs of wheels, so that they have to be accommodated by the second and further wheel base, this is not critical, since these usually have greater ground clearance. i.e. In the middle of the vehicle there is a sufficiently large distance between the vehicle underbody and the base body of the lift.

The two driving levels can be formed integrally from one component. For example, the walkway can be designed as a rail, which has a step or ramp to form the height difference between the first and second travel levels. According to one embodiment, one or more gratings or one or more plates are provided to form the second travel level, which are arranged detachably on a base body of the respective travel walkway. The desired roadway level can be changed comparatively easily by changing the gratings or plates. i.e. the lifting platform can be flexibly adapted to the respective application. For example, the lifting platform can also be converted relatively easily into a lifting platform in which the walkways only have one lane level. Another option for forming the two driving levels is to integrate the first driving level in the drive-on area. Specifically, in the area of the drive-on area, a drive-on ramp with an additional flattened element that forms the first drive level can be provided, with the drive-on ramp then leading to the second drive level formed by the walkway with the second roadway level.

In order to prevent a vehicle from being able to roll off the walkways in the drive-on direction, each walkway can have a roll-off safety device at least on its end region opposite the drive-on area. The roll-off safety device can e.g. B. as a ramp, an upwardly angled leg or other upwardly projecting rollover protection. The second driving level can e.g. B. extend up to the roll-stop. The roll-off protection then represents a kind of termination of the second driving level.

So that a vehicle can easily drive onto the walkways, each walkway can have a drive-on ramp in its drive-on area. In the case of a lifting platform whose moving walkways have a higher overall structure—compared to the prior art—the drive-on ramps can each have a ramp area and a flattened area adjoining it in the drive-on direction. The flattened area can function as the first driving level with the first roadway level, while the second driving level is formed by the adjoining area of the walkways with the second roadway level, which is higher in comparison.

As is known from the prior art, the access ramp can be fastened to the respective moving walkway so that it can rotate about an axis of rotation, the axis of rotation being oriented transversely to the direction of access and parallel to the base of the lifting platform. By providing the axis of rotation, the ramp can perform a rotary movement when lifting. In particular, when the lifting platform is in the lowered state, the access ramp can assume a position in which a first leg of the access ramp is supported on the ground and a second leg of the access ramp rests on the moving walkway. In this position, the access ramp acts as a ramp for easier access to the moving walkway. When raised, the access ramp rotates in contrast. i.e. When the lifting platform is raised, the ramp assumes a rotated position in relation thereto, in which the second leg is aligned at an angle relative to the walkway and in particular protrudes upwards in the lifting direction, as a result of which the second leg acts as a roll-off safety device. The access ramp thus has a dual function: on the one hand, when it is lowered, it acts as a ramp for easier access, on the other hand, when it is raised, it acts as a roll-off safety device. In concrete terms, the second leg can extend at least up to 100 mm above the first travel plane when it is raised, viewed in the lifting direction. Effective roll-off protection can thus be provided for vehicles whose wheels have a diameter in the range of the usual sizes.

The lifting platform can be designed in such a way that the vehicle can be raised either without wheels or with its wheels. For a wheel-free lift, the vehicle is typically lifted with its body. i.e. the vehicle is supported with its body on the lifting platform, while the wheels are practically hanging freely in the air. In order to raise the vehicle with its wheels, on the other hand, the wheels are raised together with the body, with the vehicle being supported by its wheels on the lifting platform. In order to be able to switch between wheel-free lifting and lifting of the vehicle as a whole, the base body and the walkways of the lifting platform are detachably connected to one another according to an embodiment of the invention in such a way that the walkways can be raised and lowered by the lifting device with or without the base body . If the walkways and the base body are connected to each other, the walkways will also be raised when the base body is lifted. i.e. the vehicle is supported with its wheels on the walkways even when it is raised. If, on the other hand, the connection between the walkways and the base body is released, the base body is raised while the walkways remain in their lowered position. The base body typically engages the underbody of the vehicle with support arms. i.e. when the vehicle is lifted, it is supported by its body on the support arms or the base body, while the wheels gradually carry less of the vehicle's weight until they finally hang freely in the air.

The drive and the mechanism for lifting can in principle be of any design. For example, the lifting platform can have an electric motor drive. According to one embodiment, the lifting platform according to the invention can be designed as a pneumatically driven scissor lift with an air bellows. For the greatest possible stroke, the air bellows can in particular have three chambers arranged one above the other in the stroke direction. With three chambers arranged one above the other, there is already a not inconsiderable height when they are raised. However, this is not critical due to the inventive introduction of an additional driving level with an additional roadway level, since even vehicles with low ground clearance can nevertheless safely drive onto the lifting platform due to the additional step or extended ramp introduced in this way.

To clarify the idea according to the invention and its broad suitability for vehicles with low ground clearance, the idea according to the invention is explained below using an example with specific height and length specifications:

Typically, the first driving level with the first lane level is designed at a height of 70 to 100 mm in order to allow the height difference to the ground on which the lifting platform stands with an approx. 30 cm long ramp for vehicles that are as flat as possible.

After a distance that certainly covers the largest possible tires with a diameter of approx. 60 cm, the walkways show an increase in roadway level of approx. 4 cm. i.e. the second roadway level according to the invention is about 4 cm higher than the first roadway level. The distance between the driving level and the upper edge of the support arms is thus reduced to approx. 60 mm in the area of the second driving level with the second roadway level. The distance remains uncritical even for vehicles with low ground clearance.

The fact that a section of, for example, approx. 60 cm in length must be provided at least in sections for each walkway, which forms the first driving level with the first roadway level, ultimately does not limit the applicability of the lifting platform to vehicles of a maximum vehicle length. For example, on the lifting platform according to the invention, even large vehicles with a wheelbase of up to approx. 3.7 m still have room entirely on the second driving level with the second roadway level, which is higher than the first roadway level. Vehicles with a longer wheelbase, such as B. vans, always have enough ground clearance, so that it is not critical if a wheel pair is parked for lifting on the first driving level with the first, compared to the second roadway level lower roadway level compared to the footprint. Due to the high ground clearance that is typical of such vehicles, there is no risk of the support arms accidentally coming into contact with the underbody of the vehicle.

Advantageous developments of the invention result from the claims, the description and the drawings. The advantages of features and combinations of several features mentioned in the description are merely exemplary and can have an effect alternatively or cumulatively without the advantages necessarily having to be achieved by embodiments according to the invention. The features mentioned in the claims and the description are to be understood with regard to their number in such a way that exactly this number or a larger number than the number mentioned is present, without the need for an explicit use of the term “at least”. If, for example, a support arm is mentioned, this is to be understood in such a way that there is exactly one support arm, two support arms or a plurality of support arms. These characteristics may be complemented by other characteristics or they may be the only characteristics that make up the product in question. Reference signs contained in the claims do not limit the scope of the subject-matter protected by the claims. They only serve the purpose of making the claims easier to understand.

character list

• 1 eine schematisierte perspektivische Ansicht wesentlicher Teile einer erfindungsgemäßen Hebebühne im angehobenen Zustand;
• 2 die Teile der Hebebühne gemäß 1 in einer Seitenansicht.

Further measures improving the invention are presented in more detail below together with the description of preferred exemplary embodiments of the invention with reference to the figures. It shows:

• 1 a schematic perspective view of essential parts of a lifting platform according to the invention in the raised state;
• 2 the parts of the lift according to 1 in a side view.

In the 1 and 2 an embodiment of a lifting platform 1 according to the invention is shown, wherein the lifting platform 1 is not shown as a whole, but only some parts of the lifting platform 1 are shown schematically. For example, a standing area and a lifting device of the lifting platform 1 are not shown in the figures. Rather, only the upper structure of the lifting platform 1 is shown.

In order to indicate how a vehicle is positioned on the lifting platform 1 in the operational state in which the vehicle can be raised, four wheels 2 of the vehicle are indicated. The size and the distance between the wheels 2 are only chosen as an example. For example, the distance between the wheels in the drive-on direction 3 can also be larger or smaller.

The lifting platform 1 comprises a base body 4, which in addition to the 1 and 2 parts shown can also include other parts. The base body 4 has, among other things, a platform 5 with support arms 6 arranged thereon. The platform 5 with the support arms 6 can be raised or lowered when the lifting platform 1 is in operation with respect to the standing area of the lifting platform 1, which is not shown.

In addition, the lifting platform 1 has two walkways 7 onto which a vehicle can drive with its wheels 2, as indicated in the figures. The walkways 7 are arranged laterally next to the platform 5 of the base body 4 as seen in the drive-on direction 3 .

In the illustrated embodiment, the two walkways 7 are on a base frame 8 assembled. Through this, on the one hand, the two walkways 7 are coupled together, which z. B. for a synchronous lifting and lowering of the walkways 7 is important. On the other hand, the base frame 8 can be coupled to the base body 4 . When the base frame 8 and the base body 4 are coupled to one another, both and thus also the walkways 7 are raised and lowered during operation. i.e. the vehicle is then ultimately raised or lowered as a whole, the vehicle being supported with its wheels 2 on the walkways 7 . In contrast, wheel-free lifting of the vehicle is also possible, namely when the base frame 8 and the base body 4 are not coupled to one another. In this state, only the base frame 8 is moved by the lifting device, while the base frame 8 with the walkways 7 remains in its normal position. i.e. the vehicle is then supported by the support arms 6 on its underbody, while the wheels 4 hang freely in the air.

At its one end, the walkway 7 has a roll-off safety device 9, which in the exemplary embodiment shown is designed as a leg that protrudes obliquely upwards.

At its other end, a ramp 10 is arranged on the walkway 7, so that a vehicle can drive onto the lifting platform 1 with as few steps as possible. In the present exemplary embodiment, the ramp 10 is arranged on the walkway 7 such that it can be rotated about an axis of rotation 11 . The ramp 10 has an angled shape with a first leg 11 and a second leg 12 projecting therefrom at an angle, with the axis of rotation 13 being positioned in the region of the bend between the two legs 11 and 12 .

In the lowered state, the ramp 10 lies with its second leg 12 on the walkway 7, while it is supported with its first leg 11 on the ground on which the lifting platform 1 is set up. This results in an easily negotiable drive-on slope from the subsoil onto the walkway 7.

When lifting, the ramp 10 rotates about the axis of rotation 13 due to the force of weight. The ramp 10 therefore assumes a rotated position in which the second leg 12 is oriented at an angle relative to the travel bridge 7 and projects upwards, in particular in the lifting direction 14, whereby the second leg 12 acts as a roll-stop. The length of the second leg 12 is preferably dimensioned such that the height of the roll-off safety device is approximately 10 cm, which is sufficient for effective roll-off protection for most vehicles or most wheel diameters.

• - eine erste Radstandfläche 15, innerhalb der ein erstes Rad 2 des zu hebenden Fahrzeugs zu positionieren ist, so dass das Fahrzeug mit der Hebebühne 1 gehoben werden kann;
• - eine zweite Radstandfläche 16, innerhalb der ein zweites Rad 2 des zu hebenden Fahrzeugs zu positionieren ist, so dass das Fahrzeug mit der Hebebühne 1 gehoben werden kann;
• - ein zwischen den beiden Radstandflächen 15 und 16 liegender Zwischenbereich 17.

Each moving walkway 7 can be divided into (at least) three functional areas:

• - a first wheel base 15 within which a first wheel 2 of the vehicle to be lifted is to be positioned so that the vehicle can be lifted with the lifting platform 1;
• - a second wheel base 16 within which a second wheel 2 of the vehicle to be lifted is to be positioned so that the vehicle can be lifted with the lifting platform 1;
• - An intermediate area 17 located between the two wheel bases 15 and 16.

In the operational state of the lifting platform 1 shown in the figures, in which the vehicle can be raised or lowered, the wheel pairs 2 are each positioned in the area of the first and second wheel bases 15 , 16 of the walkways 7 .

In addition to the distinction with regard to the functional importance of areas of the walkways 7, a distinction can also be made with regard to the roadway level compared to the footprint of the lifting platform. According to the invention, the walkways are designed in such a way that they do not merely have a roadway level. Rather, there are at least two roadway levels, which are arranged in a specific manner as viewed in the direction of entry 3 . In concrete terms, it is provided that each walkway 7 has a first driving level 18 with a first driving level 19 and a second driving level 20 with a second driving level 21 that is higher than the first driving level 19 . In the exemplary embodiment shown, the first driving level 18 and the second driving level 20 are connected to one another by a ramp 22 in order to bridge the height difference.

If a vehicle drives onto the gangway 7 in the drive-on direction 2, it first gets to the first drive level 18 with the first driveway level 19 via the drive-on ramp 10. If it drives on, it gets to the second drive level 20 with the second driveway level 21 via the ramp 22 Which - as shown - z. B. can extend to the end of the walkway 7 and the roll-off safety device 9 arranged there. When the vehicle assumes its position for the operational state of the lifting platform 1, in which it is raised, at least the front pair of wheels 2 seen in the drive-on direction 3 is on the second roadway level 21. The other pair of wheels 2 can - depending on the vehicle length or distance of the wheel pairs 2 - are also on the second roadway level 21 or still on the first roadway level 19 (or an intermediate level on the ramp 22).

In other words, according to the invention, at least the second wheelbase 16 is in the area of the second driving plane 20 with the second roadway level 21. The first wheelbase 15, on the other hand, extends over the transition between the two driving planes 18, 20. i.e. the first wheel base 15 includes both a section that is located in the area of the first driving plane 18 and a section that is located in the area of the second driving plane 20 . In the illustrated embodiment, the vehicle is seen with its rear pair of wheels 2 z. B. just in the area of the second driving level 20 and protrudes slightly into the area of the ramp 22, which leads to the first driving level 18.

The intermediate area 17 between the two wheel bases 15, 16 is located in the illustrated embodiment in the area of the second driving plane 20 with the second roadway level 21.

Since the vehicle must first be brought onto the first driving level 18 with the first roadway level 19, which is not yet that high compared to the ground, a comparatively short length is sufficient for the loading ramp 10. This has a positive effect on the lifting height at which the drive-on ramps 10 are already pivoted far enough so that they can also act as roll-off protection. In addition, a short length of the ramps 10 has an effect on a comparatively short overall length of the lifting platform 1.

In vehicles with low underbody clearance, it can happen that the first roadway level 18 is not high enough to provide the necessary ground clearance when the support arms 6 drive over the platform 5 . According to the invention, however, insufficient ground clearance is prevented in that the vehicle drives onto the second driving level 20 with the second, higher roadway level 21 with its front pair of wheels 2 before it reaches the area of the platform 5, which means that the additional ground clearance that may be required is created.

Optionally, there can be further driving levels with further roadway levels. In particular, there can be such further driving levels in the area of the intermediate area 17 . For example, it can be provided that, viewed in the drive-on direction 3, another driving level is provided overlapping with the platform 5, the roadway level of which is even higher or which represents an intermediate level between the first and second roadway levels 19, 21.

In order to implement the different driving levels 18, 20, the walkways 7 are of modular design in the exemplary embodiment shown. To this end, the walkways 7 have a base body 23 on which plate-shaped elements 24, e.g. B. gratings and plates, are each mounted at a suitable height, which ultimately form the trafficable area. In this way, the desired driving levels with the desired roadway levels can also be subsequently implemented and/or flexibly adjusted.

Reference List

1

lifting platform

2

wheel

3

drive-on direction

4

body

5

platform

6

Beam

7

walkway

8th

base frame

9

roll-off protection

10

ramp

11

leg

12

leg

13

axis of rotation

14

stroke direction

15

wheelbase

16

wheelbase

17

intermediate area

18

driving level

19

road level

20

driving level

21

road level

22

ramp

23

body

24

elements

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was 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.

Patent Literature Cited

• DE 202008009767 U1 [0002]
• CN 215854893 U1 [0003]
• US2015129820A1 [0003]

Claims (10)

Lifting platform (1) for a vehicle with - a platform with which the lifting platform (1) can be supported on a substrate, - a base body (4) which can be raised and lowered relative to the platform by means of a lifting device, and - two with walkways (7) that the vehicle can drive on, which are arranged on opposite sides of the base body (4), each walkway (7) - a drive-on area over which the vehicle can drive in the drive-on direction (3), - a first wheel base (15), which, in the operational state, accommodates a first wheel (2) of the vehicle that has been driven on, and - a second wheel base (16), which, in the operational state, accommodates a second wheel (2) of the vehicle that has been driven on, characterized in that each walkway (7 ) - a first driving plane (18) with a first roadway level (19) and - a second driving plane (20) lying behind it in the drive-on direction (3) with a second roadway level (21) which is higher than the first roadway level (19), wherein at least the second wheel base (16) is positioned in the area of the second driving level (20). lift (1) after claim 1 , characterized in that a ramp (22) is provided between the first driving level (18) and the second driving level (20). Lifting platform (1) according to one of the preceding claims, characterized in that an intermediate area (17) between the two wheel bases (15, 16) has an intermediate level which is higher in relation to the base than the first roadway level (19) and in particular Height of the second road level (21). Lifting platform (1) according to one of the preceding claims, characterized in that the first wheel base (15) extends from an area of the first driving level (18) to an area of the second driving level (20). Lifting platform (1) according to one of the preceding claims, characterized in that the second travel level (20) is formed by one or more plate-shaped elements (24), such as gratings or plates, which can be removed on a base body (23) of the respective walkway (7 ) are arranged. Lifting platform (1) according to one of the preceding claims, characterized in that each gangway (7) has a roll-off safety device (9) at least on its end region opposite the drive-on area, with the second travel level (20) extending in particular up to the roll-off safety device (9). . Lifting platform (1) according to one of the preceding claims, characterized in that in the drive-on area of each walkway (7) there is a drive-on ramp (10) which is fastened to the respective walkway (7) so that it can rotate about an axis of rotation (13) and which is transverse is oriented to the drive-on direction (3) and parallel to the base of the lifting platform (1). lift (1) after claim 7 , characterized in that - when the lifting platform (1) is in the lowered state, a first arm (11) of the access ramp (10) is supported on the ground and the access ramp (10) rests with a second arm (12) on the walkway (7). and - when the lifting platform (1) is in the raised state, the access ramp (10) assumes a rotated position in relation thereto, in which the second leg (12) assumes an angled position in relation to the walkway (7), so that this forms a roll-off safety device. Lifting platform (1) according to one of the preceding claims, characterized in that the base body (4) and the walkways (7) are detachably connected to one another in such a way that the walkways (7) can optionally be connected with or without the base body (4) by the lifting device can be raised and lowered. Lifting platform (1) according to one of the preceding claims, characterized in that the lifting platform (1) is a pneumatically driven scissor lift with an air bellows with three chambers arranged one above the other in the lifting direction (14).

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