EP2824061A1 - Lifting device and raising platform with such a lifting device - Google Patents

Abstract

A lifting device (1) which can be actuated by a flowable medium, with a main carrier (2) forming a first cavity (4), with a first lifting element (42) which is arranged at least in sections within this first cavity (4) and which faces it Cavity (4) is movable in two mutually opposite directions of movement (R1, R2), with a first supply opening (44), in order to supply the first cavity (4) the flowable medium, wherein by supplying the flowable medium in the first cavity ( 4), the first lifting element (4) in the first direction of movement (R1) is moved. According to the invention, the main carrier has a second cavity (6), which is arranged fixed against movement relative to the first cavity (4) and a second lifting element (62), which is arranged at least partially within this second cavity (6) and which faces the cavity in the two mutually opposite directions of movement (R1, R2) is movable, with a second feed opening (44) to the second cavity (6) to supply the flowable medium, wherein by supplying the flowable medium in the first cavity (4), the second lifting element ( 4) in the second direction of movement (R2) is moved.

Description

The present invention relates to an actuatable by a flowable medium lifting device and in particular to a hydraulically or pneumatically operated lifting device. In this case, the invention is described in particular with reference to a lift for lifting motor vehicles, it is to be noted, however, that the device according to the invention can also be used for other lifting devices or lifting devices for objects other than motor vehicles.

Such lifts are known from the prior art for a long time. A distinction is made in particular between underfloor lifts and overhead lifts. In the case of overfloor lifts, essentially the complete lifting mechanism is arranged above the floor level. This means that when relatively large lifting heights have to be overcome, for example, corresponding lifting rams must be relatively long in order to reach these lifting heights. In this way, the space in a vertical direction will usually turn out to be relatively large.

The present invention is therefore based on the object of reducing the installation space of such lifting devices, in particular in a vertical direction. This object is achieved by a lifting device and a lift according to the independent claims. Advantageous embodiments and further developments are the subject of the dependent claims.

An inventive actuatable by a flowable medium lifting device has a main carrier which forms a first cavity and a first lifting element, which is at least partially disposed within this first cavity and which is movable relative to this cavity in two mutually opposite directions of movement. Furthermore, the lifting device has a (supply) opening in order to supply the flowable medium to the first cavity (or to discharge it from the first cavity, in particular for lowering an object), the first lifting element being fed into the first cavity by supplying the flowable medium is moved in the first direction of movement.

According to the invention, the main carrier has a second cavity, which is arranged immovably with respect to the first cavity and a second lifting element, which is arranged at least partially within the second cavity and which is movable relative to this second cavity in the two opposite directions of movement. In addition, a second opening and in particular a feed or discharge opening is provided to supply the second cavity to the flowable medium or to dissipate therefrom, wherein by supplying the flowable medium in the second cavity, the second lifting element in the second direction of movement (which first direction of movement is opposite) is moved. Preferably, the boundary walls of the cavities are immovable with respect to each other.

The flowable medium is, in particular, a hydraulic medium or a pneumatic agent, which is particularly preferably a hydraulic medium such as, for example, oil or water or the like. Preferably, the main carrier has at least one wall, which separates the two cavities from each other. In this case, this wall preferably extends in a direction of movement of the lifting elements.

It is therefore proposed that by supplying, for example, a simultaneous supply of the flowable medium, an extension of the lifting elements in the two directions, which are opposite to each other, is possible. In a further advantageous embodiment, at least one vent valve is provided to vent at least one cavity and / or at least one feed channel for supplying the flowable medium.

It is therefore proposed to reduce the installation space, that when expanding the lifting device, the two lifting elements are extended in the opposite direction from the main carrier. In this way, overall space can be saved, since a length of said main carrier can be kept shorter in the direction of movement, as if only one lifting element is extended in one direction.

In a preferred embodiment, the first cavity and the second cavity are at least indirectly in fluid communication with each other by means of at least one conduit carrying the fluid medium. Indirectly, it is understood that the flow connection can also take place via a second lifting device and, for example, a first cavity of the first lifting device is in flow communication with a second cavity of the second lifting device. However, it can also be provided a connecting piece and / or a connecting line, which connects the two cavities of a lifting device hydraulically. It would also be conceivable that the connection is realized by an opening or a gap in or on the edge of a wall which separates the cavities from each other.

In this embodiment, therefore, the lifting elements move within the cavity / cavities of the main carrier. However, it would also be conceivable that, conversely, the main carrier is received by the lifting elements and therefore the lifting elements also form the corresponding cavities for receiving the main carrier. In this case, the first and the second lifting element would each form cavities, and these could be acted upon by the flowable medium, wherein a movement of the lifting elements relative to the carrier is achieved by acting on the respective cavities.

In a preferred embodiment, the lifting device is a hydraulically operated lifting device and, as mentioned above, the flowable medium is preferably a liquid, in particular oil or water.

In a further advantageous embodiment, at least one lifting element is arranged stationary. It is possible that, for example, a lifting element is attached to a floor, in turn, the main carrier is arranged on this lifting element and in turn the second carrier is arranged on the main carrier. This is when lifting the object or an extension of the lifting device both the main carrier moves and the second lifting element (relative to the main carrier). It is possible that the absolute speed of the movement of the second lifting element is twice as high as the speed of movement of the main carrier. However, this is not absolutely necessary, since this can also be configured differently depending on a cross section of the respective lifting elements.

In a further advantageous embodiment, at least one lifting element has a channel for conducting a flowable medium and in particular a hydraulic medium. This channel may preferably be formed in a base body of the lifting element. Preferably, this channel runs in the above-mentioned direction of movement.

In a further advantageous embodiment, the device has at least one venting valve for venting this channel. In this case, this vent valve may for example be arranged between one end of this channel and a region of the lifting device.

In a further advantageous embodiment, the first cavity has a first chamber and a second chamber, which are separated from each other by a piston element of the first lifting element. This means that upon movement of the lifting element with respect to the main support or with respect to the cavity, the volume of one chamber is changed to the same extent, for example reduced, as the volume of the other chamber (in this case increased). Advantageously, the second chamber is in flow communication with the above-mentioned second cavity. Thus, advantageously, the second chamber also has an opening through which the flowable medium can be supplied and / or removed.

The present invention is further directed to a device for lifting objects and in particular motor vehicles. This device has a support which has at least one support element to be arranged at least indirectly on the element to be lifted and at least one lifting device of the type described above. The support element is at least indirectly coupled to a lifting element of the lifting device. This means that with a movement of the lifting element and the said support element is moved.

In a further advantageous embodiment, the device also has a housing, within which the lifting device is arranged. Advantageously, the device is an overfloor lifting platform, that is to say a lifting platform whose mechanical elements are arranged at least predominantly above a floor level.

In a further advantageous embodiment, the device has a guide device for guiding a movement of the main carrier. In this case, for example, the main carrier can be guided within a housing and thus in particular a movement in the vertical direction of this main carrier are performed.

In a further advantageous embodiment, the device has a second lifting device and it is preferably provided a connecting line to direct the flowable medium from the first lifting device to the second lifting device. In this embodiment, for example, on the two sides of the object to be lifted in each case a lifting device may be provided, which is in each case equipped with support elements. Thus, these two lifting devices are preferably coupled to one another via the flow agent and particularly preferably hydraulically.

Thus, in comparison to prior art devices not only a central supply is provided, which supplies the flowable medium to the two lifting devices, but it leads a conduit for the flowable medium from one lifting device to the other lifting device. Advantageously, two connecting lines are provided, which connect the two lifting devices with each other. It is possible that in the individual lifting devices, the movement of the lifting elements is designed as a master-slave drive, so that the movement of a lifting element relative to the main carrier also generates the movement of the other lifting element (in particular another lifting device).

In a preferred embodiment, the second lifting device is a lifting device of the type described above and preferably a first lifting element of the first lifting device is connected via a first connecting line for the flowable medium with a second lifting element of the second lifting device. In particular, a symmetrical structure results between the two lifting devices. It is possible that two central supply lines are provided to the device in each case the hydraulic medium supply, wherein preferably a feed of the first lifting device, the medium feeds and the second supply line of the second lifting device and moreover, preferably, the two lifting devices are connected to each other via connecting lines.

Fig. 1

Eine Darstellung einer erfindungsgemäßen Hubeinrichtung;

Fig. 2

eine Darstellung einer Überflurhebebühne unter der Verwendung der Erfindung;

Fig. 3

eine weitere Darstellung einer Hebebühne mit der erfindungsgemäßen Hubeinrichtung;

Fig. 4a - 4d

vier Darstellungen zur Entwicklung einer erfindungsgemäßen Hubeinrichtung;

Fig. 5

eine weitere Ausgestaltung einer erfindungsgemäßen Hebebühne.

Further advantages and embodiments will become apparent from the accompanying drawings. Show:

Fig. 1

An illustration of a lifting device according to the invention;

Fig. 2

an illustration of an overhead lift using the invention;

Fig. 3

a further illustration of a lift with the lifting device according to the invention;

Fig. 4a - 4d

four illustrations for the development of a lifting device according to the invention;

Fig. 5

a further embodiment of a lift according to the invention.

Fig. 1 shows a schematic representation of a lifting device according to the invention 1. This lifting device 1 in this case has a main support 2, which can be configured as a housing and on or in turn a first lifting element 42 and a second lifting element 62 are arranged. In this case, these two lifting elements 42, 62 relative to this main carrier 2 are movable in the two mutually opposite directions R1 and R2.

In Fig. 1 the situation is shown in which the lifting device is extended, that is, the first lifting element relative to the main carrier 2 moves down and the second lifting element 62 relative to the main carrier in the direction R2, that is, upwards moves. The reference numeral 44 denotes a feed opening or generally a feed device, which is shown here at the lower end of the lifting element 42. The reference numeral 48 denotes a running inside the lifting element 42 channel, via which a hydraulic means, here for lifting upwards, can be guided and can enter into a cavity 4 or the cavity part 4a.

By this supply of hydraulic fluid, the carrier 2 is moved relative to the lifting element 42 upwards, since the first lifting element 42 is firmly anchored to the ground. From the lower subspace 4b, the hydraulic fluid is brought into the cavity 6 via a connecting line 24 and a feed opening 64. As a result, in turn, the second lifting element is pushed upwards, that is, out of the carrier 2. However, this connection line can also be formed within the main carrier and be given for example in the simplest case through an opening in the wall 72 in the interior of the main carrier 2.

Fig. 2 shows a representation of a lift, here an overground lift 60, in which the invention is also used. Here, too, as shown by the character P, the hydraulic fluid is supplied to both lifting devices 1 and 10. Through the channels 48, the hydraulic fluid passes into the cavities 4a. This is with the in Fig. 2 the embodiment shown, the two supply elements in both lifting devices 1, 10 redundantly available. In this way, the two main carriers 2 each move upwards relative to the feed elements 42, and in this way also the hydraulic medium can be forced out of the respective lower space 4b. Thus, the feed elements preferably each have rod-like bodies, which preferably extend in the stroke direction. It should be noted here that the first feeding element 42 is also the first lifting element, since this first feeding element has both the function of supplying the hydraulic medium and the function of serving as a stationary lifting element, which is movable relative to the main carrier 2.

Unlike the in Fig. 1 shown embodiment, however, the hydraulic medium is not performed in the adjacent space, but via the connecting lines 32 and 34 respectively in the space 6 of the other lifting device 10 and 1. Furthermore, here is another channel 43 also within the feed, whereby the Line expense is simplified. More precisely, further supply elements 42 (the supply elements located in each case in the figure) are supplied with the hydraulic medium by the connecting lines 32, 34.

The channel 43 establishes the connection with the other lifting device. Preferably, therefore, the first lifting element 42 has at least two channels, which are preferably parallel to each other and in which the hydraulic medium flows in different and in particular in opposite directions.

It can be seen that in this embodiment two supply elements are present, which are supplied simultaneously or in parallel with the hydraulic medium. In this way, a redundancy can be achieved.

Via the supply lines 32, 34, the hydraulic medium enters the spaces 6a and 6b (more precisely via an opening in the wall 72 in the interior of the main carrier) and thus causes the two lifting elements 62 to be pushed upwards. A support 86 is arranged on the supply elements 62 and, in turn, a support arm 84 is pivotably mounted on these, on which a support element 82 is provided, which serves to lift the motor vehicle. The reference numeral 48 designates another passage which is provided in the feeding member 42 and which in turn serves for feeding the hydraulic medium into the cavities 6a (the other lifting means). By this configuration can be dispensed in a particularly simple manner on the leadership of another connection line. So that we achieved by the shown mutual connection of the lifting devices also a synchronization control.

Fig. 3 shows a further embodiment of a lift according to the invention. Again, the hydraulic medium (reference P) is first supplied via a feed line to the respective feed element 42 and in turn passes into the cavity 4a. However, due to the movement described above, the hydraulic medium is in turn forced out of the spaces 6a and 6b (which are connected to one another) through the other channel 43 of this feed element 42 and passes via the two connecting lines 32 and 34 alternately to the respective other feed element 42 (FIG. shown lying inside) and there in the spaces 6c and 6d (which are connected to each other via the line connection 48) and causes in this way an extension of the second supply element 62 shown here on the left. In this way, the supply elements 62 are also redundant.

The Fig. 4a - 4d show a development of a lifting device according to the invention. Fig. 4a shows only an arrangement of a feed element 42 and a main carrier 2. By supplying the hydraulic fluid, the main carrier 2 is moved up here. Fig. 4b shows a redundant arrangement of two main carrier 6, which, however, are advantageously assembled here. In this case, the carrier 2 is also raised by the supply of the hydraulic medium (P).

Fig. 4c shows a representation similar to the Fig. 4a , in which case the two lifting elements 42 and 62 are each extended out of the carrier 2 (or the carrier 2 is extended relative to the lifting element 42). At the in Fig. 4d In the embodiment shown, both the feed elements 42 and the lifting elements 62 are duplicated. In this way, a redundancy of the system is achieved. A flow connection between the space 4b and the space 6a is made here by a connecting line 56. Again, however, the connection could be realized again on internal openings.

Fig. 5 shows a further embodiment of a lifting platform according to the invention. Here again the two hydraulic devices are supplied to the two lifting devices 1, 10 via the feed elements 42 and the lifting elements. From these feed elements 42, the hydraulic medium passes into the first partial spaces 4a and causes the two main carriers 2 to be extended upward.

In addition, the hydraulic medium here also passes directly via connecting lines 47 into the two spaces 6a and thus causes the second lifting elements 62b to be extended out of the main carrier 2. From the two subspaces 6b, the hydraulic medium is supplied via a further connecting line 49 in each case the spaces 4b and each further supplied via the located in the respective first lifting elements line 43 and the connecting lines 32, 34 of the other lifting device. Here, the hydraulic medium passes via the two internally shown feed elements 42 into the respective inner spaces 4a and thus also supports the extension of the main carrier. Via the connecting lines 52, the hydraulic medium in each case passes into the other (here again internally shown subspaces 6a whereby the lifting elements 62a are extended.

In the concepts of the lift shown here so on the one hand, the lifting devices according to the invention are used, but also by at least one and preferably at least two connecting lines between the lifting devices realized a synchronization of the two lifting devices.

The Applicant reserves the right to claim all features disclosed in the application documents as essential to the invention, provided they are novel individually or in combination with respect to the prior art.

LIST OF REFERENCE NUMBERS

1

lifting device

2

Main carrier / lifting device

4

cavity

4a

cavity part

4b

lower subspace

6, 6a, 6b

cavities

10

lifting device

24

connecting line

32, 34

supply lines

42

Lifting elements / feed elements

43

channel

44

feed

47, 49

interconnectors

48

channel

52, 56

interconnectors

60

About inground lift

62

Lifting elements / feed elements

64

feed

72

wall

82

carrying member

84

holding arm

86

carrier

R1

Movement direction down

R2

Direction of movement upwards

P

hydraulic fluid

Claims (10)

A lifting device (1) which can be actuated by a flowable medium, with a main carrier (2) forming a first cavity (4), with a first lifting element (42) which is arranged at least in sections within this first cavity (4) and which faces it Cavity (4) is movable in two mutually opposite directions of movement (R1, R2), with a first supply opening (44), in order to supply the first cavity (4) the flowable medium, wherein by supplying the flowable medium in the first cavity ( 4) the first lifting element (4) is moved in the first direction of movement (R1),
characterized in that
the main carrier has a second cavity (6) which is arranged immovably with respect to the first cavity (4) and a second lifting element (62), which is arranged at least partially within this second cavity (6) and which opposite to this cavity in the two opposite directions of movement (R1, R2) is movable, with a second feed opening (44) to the second cavity (6) to supply the flowable medium, wherein by supplying the flowable medium in the first cavity (4) the second lifting element (4) in the second direction of movement (R2) is moved. Lifting device (1) according to claim 1,
characterized in that
the first cavity (4) and the second cavity (6) are at least indirectly in communication with one another of a fluid connection which conducts the fluid medium. Lifting device (1) according to claim 1,
characterized in that
the lifting device (1) is a hydraulically operated lifting device. Lifting device according to at least one of the preceding claims,
characterized in that
at least one lifting element is arranged stationary. Lifting device according to at least one of the preceding claims,
characterized in that
at least one lifting element (42) has a channel (48) for conducting the hydraulic medium. Lifting device according to at least one of the preceding claims,
characterized in that
the first cavity (4) has a first chamber (4a) and a second chamber (4b), which are separated from each other by a piston element (52) of the first lifting element (42). Device (60) for lifting objects and in particular motor vehicles with a carrier, which has at least one support element to be lifted on the element to be lifted and with at least one lifting device (1) according to at least one of the preceding claims, wherein the support element is connected to at least one lifting element Lifting device is coupled. Device (60) according to claim 7,
characterized in that
the device (60) has guide means (62) for guiding movement of the main carrier. Device (60) according to at least one of the preceding claims,
characterized in that
the device (60) comprises a second lifting device (11) and at least one connecting line (64) is provided to guide the fluid medium from the first lifting device (1) to the second lifting device. Device (60) according to claim 9,
characterized in that
Also, the second lifting device is a lifting device according to at least one of the preceding claims and preferably a first lifting element (42) of the first Lifting device (1) via a connecting line for the flowable medium with a second lifting element (62) of the second lifting device (11) is connected.

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