EP3882209A1 - Lifting table and use of a lifting table - Google Patents

Abstract

The present invention relates to a lifting table (10) with a table top (12), a lifting unit (14), a chassis (16) and a push handle (18), the push handle (18) being designed to be horizontally displaceable between an extended position and an inserted position . The present invention also relates to the use of a lifting table (10) for exchanging and maintaining vehicle batteries.

Description

The present invention relates to a lifting table with the features of claim 1 and the use of such a lifting table for the exchange and maintenance of vehicle batteries.

Lift tables are used in a wide range of applications for lifting and lowering loads. To do this, the load is placed on the table top and then raised or lowered using the lifting unit below. Lift tables, in particular in the form of scissor lift tables, are widespread. Often lifting tables are also designed to be mobile by means of a chassis, so that the loads to be lifted can also be transported with the aid of the lifting table. For easy handling, mobile lifting tables in particular have push handles, with the aid of which a user can push the lifting table to the desired location. Various examples of lifting tables show the DE 100 43 398 A1 and the CN 205 616 513 U .

When using lifting tables, it can happen that the load protrudes beyond the table top of the lifting table. This situation is known from car repair shops, for example. Lifting tables are being used more and more frequently in order to remove and install the vehicle batteries arranged in the floor of electric vehicles. The surface area of the vehicle batteries often exceeds that of the table top of the lifting table used. the WO 2006/127 828 A2 proposes a lifting table with an extendable table top for such applications.

The disadvantage here is that when handling a load protruding in the direction of the push handle, lowering the lifting table is only possible until the underside of the load is at the height of the handle. There is also the risk of the load and the push handle colliding with each other. In order to reach the push handle when the load is lowered, it is necessary to reach far below the load, which is associated with a high potential risk for the user.

In addition, work is often carried out on the load on the table top, particularly with regard to vehicle batteries. If the protruding load can only be lowered to the height of the push handle, such work is difficult due to the height at which the load is located and therefore involves an additional safety risk.

From the CN 2 343 143 Y vertically adjustable push handles for lifting tables are known. The disadvantage here is that there is a risk of collision when the load is completely lowered, even when the push handle is pushed in. Here, too, when the load is lowered and protruding, the lifting table must be handled far below the load.

The invention is therefore based on the object of providing a lifting table which expediently eliminates the disadvantages known from the prior art and is easy to handle even with a load protruding beyond the table top. Furthermore, the lifting table should offer a high level of safety when lifting and lowering the load as well as when working on the load and, moreover, can be stowed away in a space-saving manner and is easy to manufacture.

The object is achieved according to the invention by a lifting table with the features of claim 1 and by using the lifting table according to claim 9.

Advantageous refinements and developments of the invention are specified in the dependent claims.

The lifting table according to the invention with the features of claim 1 has a table top, a lifting unit, a chassis and a push handle, the push handle being designed to be horizontally displaceable between an extended position and an inserted position.

The invention is based on the idea of providing a mobile lifting table which is ergonomically movable by means of the chassis on a surface by means of the push handle and has a table top which can be raised and lowered in a vertical axis and which can be raised by the lifting unit. The lowering of the table top can either be caused by gravity and / or by the lifting unit, whereby, as intended, the distance between the table top and the ground is increased when the table top is raised and the distance between the table top and the ground is reduced when it is lowered. The push handle is used for the ergonomic movement of the lifting table by the user, the push handle being horizontally adjustable or displaceable between at least two positions, i.e. the insertion position and the pull-out position, in order to always have one, depending on the nature of the load on the lifting table and the user's preferences to ensure safe and ergonomic handling. In the event that the spatial expansion of the load is greater than that of the available table top, stands the load also in the direction of the push handle over the table top, but the push handle can be adjusted in such a way that on the one hand there is no risk of collision between the load and the push handle and on the other hand the user does not have to reach under the load to operate or move the table . In order to then stow the lifting table in a space-saving manner, the push handle can be moved back into the insertion position.

Here and in the following, horizontal displaceability is understood to mean displaceability of the push handle in a plane essentially parallel to the table top, which is also arranged horizontally on a flat surface when the lifting table is used as intended.

According to a further embodiment of the present invention, the push handle can be fixed in at least one intermediate position between the insertion position and the pull-out position. The push handle is preferably held movably supported by a linear guide, the linear guide having locking means by means of which a relative position between the linear guide and the push handle can be set or locked. The push handle can preferably be fixable in a plurality of intermediate positions continuously or step-by-step between the insertion position and the pull-out position. In particular, it is preferred if the locking means comprise mechanical means by means of which the push handle can be fixed in a form-fitting manner both in the pull-out position and in the insertion position, but also preferably in the at least one intermediate position.

According to a further development of the present invention, the push handle can be arranged on the chassis.

Due to the arrangement of the push handle on the chassis, the application of force for moving the lifting table takes place directly on the chassis. Unfavorable lateral forces on the table top or the lifting unit are avoided.

In such an embodiment, the push handle is preferably L-shaped from the chassis in the longitudinal axis, the free end typically at a height, i.e. in the vertical axis, between 0.70 m and 1.20 m, preferably approx 0.90 m to 1 m is arranged in a transverse axis above the ground. Furthermore, the push handle can be U-shaped, curved or bow-shaped in order to ensure that the lifting table can be easily steered when moving over the ground.

Furthermore, it has proven to be advantageous if at least one operating element is provided, wherein the at least one operating element should be arranged at least partially on the push handle. In a preferred embodiment, the at least one operating element can be moved horizontally together with the push handle between the pull-out position and the push-in position, whereby ergonomic handling of the lifting table is always ensured.

The at least one operating element can preferably comprise a foot pedal for actuating the lifting unit. When using the foot, the user has his hands free for further activities and can effortlessly apply greater force to the foot pedals without this activity being perceived as particularly strenuous.

A further development of the present invention provides that the lifting table or the lifting unit of the lifting table is designed as a purely mechanical-hydraulic system.

In particular, it is preferred if the lifting unit has a cross linkage or a scissor linkage, by means of which the table top is connected to the chassis. The cross or scissor linkage has a fixed bearing side and a loose bearing side, the cross or scissor linkage on the fixed bearing side being connected on the one hand to the chassis and on the other hand to the table top. Movable scissor bearings are located on the floating bearing side. The lifting unit can be driven hydraulically, via a threaded spindle or push chains, the drive preferably being effected hydraulically via a hydraulic cylinder. The at least one operating element can communicate with the hydraulic cylinder, and when the at least one operating element is actuated, hydraulic fluid can be pumped into the hydraulic cylinder in order to raise and / or lower the table top. A further operating element can be provided, for example, in order to drain the hydraulic fluid from the hydraulic cylinder in order to lower the table top, for example.

According to a further advantageous embodiment of the present invention, the push handle can be moved between the insertion position and the pull-out position without motor assistance. The push handle is moved between the pull-out position and an insertion position exclusively by manually releasing the locking means, manually changing the relative position between the linear guide and the push handle and, if necessary, manually locking the locking means.

Furthermore, it has proven to be advantageous if a sliding movement of the push handle and a lifting movement of the lifting unit are decoupled from one another. Accordingly, the position of the push handle can be adjusted or actuated independently of the lifting unit.

Another aspect of the present invention relates to the use of the lifting table described above for the exchange and maintenance of vehicle batteries.

Figur 1

eine Seitenansicht des erfindungsgemäßen Hubtischs mit einer Tischplatte, einer Hubeinheit, einem Fahrgestell und einem Schiebegriff, wobei der Schiebegriff aus einer Einschubposition horizontal in eine Ausziehposition gestellt ist, damit eine auf der Tischplatte angeordnete Last vollständig abgesenkt werden kann,

Figur 2

den Hubtisch gemäß Figur 1 ohne die Last auf der Tischplatte und den in die Einschubposition eingeschobenen Schiebegriff,

Figur 3

den Hubtisch gemäß Figur 1, wobei die Tischplatte durch die Hubeinheit angehoben ist und der Schiebegriff in der Ausziehposition angeordnet ist, und

Figur 4

eine perspektivische Darstellung der Hubeinheit gemäß Figur 3.

An exemplary embodiment of the lifting table according to the invention is described in detail below with reference to the accompanying drawing. Show it:

Figure 1

a side view of the lifting table according to the invention with a table top, a lifting unit, a chassis and a push handle, the push handle being placed horizontally from an insertion position into an extended position so that a load placed on the table top can be completely lowered,

Figure 2

the lift table according to Figure 1 without the load on the table top and the push handle pushed into the insertion position,

Figure 3

the lift table according to Figure 1 , wherein the table top is raised by the lifting unit and the push handle is arranged in the pull-out position, and

Figure 4

a perspective view of the lifting unit according to Figure 3 .

In the following, identical or functionally identical components are identified by the same reference symbols in one exemplary embodiment. For the sake of clarity, not all parts that are the same or functionally the same are provided with a reference number in the individual figures.

The Figures 1-4 different representations of a lifting table 10 can be seen, the lifting table 10 having a table top 12, a lifting unit 14, a chassis 16 and a push handle 18.

The chassis 16 can consist of four rollers, which are arranged spaced apart in a longitudinal axis and a transverse axis, and hold the lifting table 10 movably supported over a base (not shown). In order to ensure maneuverability of the lifting table when moving over the ground, two or more rollers can be arranged on the chassis so that they can rotate in a vertical axis.

The table top 12 forms a storage area for loads 22 and is connected to the chassis 16 via the lifting unit 14.

In the exemplary embodiment shown, the lifting unit is designed as a scissor linkage, with one of the legs forming a fixed bearing on the side facing the chassis 16 and the table top 12 and being rotatably connected to the chassis 16 or the table top 12, and the other leg by means of a floating bearing is supported movably in the longitudinal axis on the table top 12 or on the chassis 16. Furthermore, the lifting unit comprises one or more hydraulic cylinders 15, which are in particular in the Figures 3 and 4 can be seen. Through the hydraulic cylinder 15 the table top 12 can be raised and lowered in the vertical axis, whereby loads 22 can be raised and lowered by the lifting table, for example for the assembly or disassembly of vehicle batteries, in particular during maintenance.

A push handle 18 is arranged on the chassis 16 by means of a linear guide at an end region of the chassis 16 arranged in the longitudinal direction, the linear guide making it possible for the push handle 18 to move between one in the Figures 1 , 3 and 4 shown pull-out position and one in the Figure 2 shown insertion position is horizontally displaceable. In other words, the push handle 18 can be adjusted in the longitudinal axis with respect to the position of the table top 12 and the load 22 located on the table top 12. The Figures 1-3 It can be seen that the push handle 18 is L-shaped and protrudes from the chassis 16 in the vertical axis in such a way that its free end is arranged at an ergonomic height between approximately 0.8 m to 1.2 m.

According to the perspective illustration Figure 4 it can be seen that the push handle 18 is U-shaped or arched in the transverse direction and has two high legs and one transverse leg, the transverse leg connecting the two high legs and forming the free end.

Furthermore, according to the perspective illustration Figure 4 it can be seen that locking means are provided by means of which the push handle 18 can be locked relative to the linear guide 16. The locking means can include, for example, clamping screws, locking pins or the like, through which the Position of the push handle 18 can be set in the longitudinal axis in the linear guide. After the locking means have been released, the user can move the push handle 18 without motor assistance, that is to say by means of a force.

Furthermore, the attached Figures 1-4 it can be seen that, together with the push handle 18, operating elements 20 that are fixedly coupled to the push handle can be moved between the pull-out position and the push-in position.

In the exemplary embodiment shown, the operating elements 20 are designed as foot pedals, the operating elements 20 communicating with the hydraulic cylinder 15 of the lifting unit 14 and, when the corresponding operating element 20 is actuated, the hydraulic cylinder 15 can be extended or retracted. Accordingly, one of the operating elements can be a hydraulic pump, while the other operating element can be a valve device.

A shifting movement of the push handle 18 takes place completely independently of a lifting movement of the lifting unit 14.

List of reference symbols

10

Lift table

12th

Tabletop

14th

Lifting unit

15th

Hydraulic cylinder

16

chassis

18th

Push handle

20th

Controls

22nd

load

Claims (9)

Lifting table (10) with a table top (12), a lifting unit (14), a chassis (16) and a push handle (18),
characterized in that
the push handle (18) is designed to be horizontally displaceable between an extended position and an inserted position. Lifting table (10) according to one of the preceding claims,
characterized in that
the push handle (18) can be fixed in at least one intermediate position. Lifting table (10) according to one of the preceding claims,
characterized in that
the push handle (18) is arranged on the chassis (16). Lifting table (10) according to one of the preceding claims,
characterized in that
Control elements (20) are provided, which are at least partially arranged on the push handle (18). Lifting table (10) according to one of the preceding claims,
characterized in that
the lifting table (10) is designed as a purely mechanical-hydraulic system. Lifting table (10) according to one of the preceding claims,
characterized in that
the push handle (18) can be moved without motor assistance. Lifting table (10) according to one of the preceding claims,
characterized in that
a displacement movement of the push handle (18) and a lifting movement of the lifting unit (14) are decoupled from one another. Lifting table (10) according to one of the preceding claims,
characterized in that
the lifting table (10) is designed as a scissor lifting table. Use of a lifting table (10) according to one of the preceding claims for the exchange and maintenance of vehicle batteries.

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