Load-bearing support

Abstract

A load-bearing support is provided for an industrial truck, which can be fastened to another device. At least one load can be displaced horizontally in relation to the industrial truck and can be fastened in such a way that the load-bearing support can be tilted in vertical direction, wherein the area through which the driver of the industrial truck can see at a corresponding lifting height of a lifting carriage is maximized. The load-bearing support has a rear and a front part, wherein the front part of the load-bearing support has at least one upper holder and a lower holder for the at least one load and the two parts are connected to each other in such a way that the two parts can be rotated and laterally displaced.

Claims

1. A load-bearing support for an industrial truck, wherein at least one load-bearing means is fastened to the load-bearing support and by means of at least one cylinder, which is arranged in a cylinder housing and has a displaceably supported piston rod, the at least one load-bearing means is displaceable horizontally in relation to the industrial truck and is tiltable in a vertical direction, and wherein the load-bearing support has a rear part and a front part, wherein the front part of the load-bearing support has at least one upper holder and a lower holder for the at least one load-bearing means and the two parts are connected to one another in a rotatable and laterally displaceable manner, wherein the rear part of the load-bearing support has at least two vertically arranged mast jaws, characterized in that the cylinder housing is connected horizontally to the at least two mast jaws in an upper region of the load-bearing support, and the upper holder of the load-bearing support encompasses significantly more than half of the cylinder housing, wherein the upper holder rotates with respect to the cylinder housing to tilt the load-bearing means in the vertical direction.

2. The load-bearing support according to claim 1, characterized in that the upper holder of the load-bearing support has a rectangular outer contour and a substantially round inner contour.

3. The load-bearing support according to claim 1, characterized in that the upper holder has a longitudinal slit, which extends substantially across the entire width of the side of the upper holder, which points towards the rear part of the load-bearing support, in substantially horizontal direction.

4. The load-bearing support according to claim 1, characterized in that the cylinder housing is connected to the two mast jaws via an intermediate bar, and the intermediate bar is arranged downstream, towards the rear part of the load-bearing support, from the cylinder housing.

5. The load-bearing support according to claim 4, characterized in that the upper holder is supported on the intermediate bar.

6. The load-bearing support according to claim 1, characterized in that two single-acting piston rods are arranged in the cylinder housing.

7. The load-bearing support according to claim 6, characterized in that the piston rods for the lateral displacement act directly against end elements on the outer sides of the load-bearing support.

8. The load-bearing support according to claim 6, characterized in that the piston rods are held completely in the load-bearing support.

9. The load-bearing support according to claim 1, characterized in that all possible horizontal positions of the load-bearing support are fixed by means of the cylinder housing with its piston rods.

10. The load-bearing support according to claim 1, characterized in that the piston rods for the lateral movement of the load-bearing support are arranged on the axis of rotation of a vertical movement.

11. The load-bearing support according to claim 1, characterized in that the cylinder housing acts as sliding guide for a vertical rotational movement of the load-bearing support.

12. The load-bearing support according to claim 11, characterized in that a changeable wear bushing is introduced between the cylinder housing and the inner side of the upper holder of the load-bearing support.

13. The load-bearing support according to claim 1, characterized in that hydraulic connections for supplying the cylinder with hydraulic liquid are arranged on the side of the cylinder housing facing the rear part of the load-bearing support.

14. The load-bearing support according to claim 1, characterized in that the upper holder and the lower holder of the load-bearing support are connected to one another via at least two vertical connecting elements, and the load-bearing support can be tilted vertically via at least one separate hydraulic cylinder, which acts against the lower holder.

15. The load-bearing support according to claim 14, characterized in that the lower side of the upper holder forms the connection for the vertical connecting elements.

Description

(1) Further advantages, special features and advantageous further developments of the invention follow from the subclaims and from the below illustration of preferred exemplary embodiments by means of the illustrations.

(2) FIG. 1 shows a load-bearing support according to the invention in a three-dimensional view

(3) FIG. 2 shows a section through the cylinder housing

(4) FIG. 3 shows a load-bearing support according to the invention in a position, which is tilted backwards

(5) FIG. 4 shows a load-bearing support according to the invention in a position, which is tilted forwards.

(6) FIG. 1 shows a load-bearing support 10 according to the invention in a three-dimensional view. The load-bearing support 10 can be fastened to an industrial truck, for example, and has a rear part 38 and a front part 35, wherein an upper holder 36 and a lower holder 37 for bearing a load-bearing means are provided on the front part 35. The load-bearing support 10 furthermore has two cylinders 31a, 31b, which are arranged in a cylinder housing 30 and in which a single-acting piston rod 32a, 32b is in each case supported in a horizontally displaceable manner. The piston rods 32a, 32b in each case act directly against end elements 11a, 11b on the outer sides of the load-bearing support 10. The load-bearing support is displaced laterally in relation to the industrial truck via a displacement of the piston rods 32a, 32b. On its front part 35, the load-bearing support 10 furthermore has an upper holder 36 and a lower holder 37, wherein load-bearing means, such as forklift forks, for example, can be fastened to these holders 36, 37. The holders 36, 37 are connected to one another via connecting elements 40a, 40b, wherein an opening, which grants unobstructed view through the load-bearing support to the operator of the industrial truck, is present between the connecting elements 40a, 40b in horizontal direction. The cylinder housing 30 is furthermore connected to two mast jaws (12a, 12b), which extend in vertical direction, via an intermediate bar 34. The load-bearing support can be tilted vertically via a separate hydraulic cylinder 50, which acts against the lower holder 37. The load-bearing support 10 thereby rotates about an axis of rotation, which corresponds to the longitudinal axis of the cylinder housing 30, wherein the load-bearing support 10 partially encompasses the cylinder housing 30 in a rotatable and slideable manner. All of the horizontal positions of the load-bearing support 10, which can be assumed, can be fixed through this. The piston rods 32a, 32b for the lateral movement of the load-bearing support 10 are arranged on the axis of rotation of the vertical movement, so that the longitudinal axis of the cylinder housing 30 simultaneously represents the axis of rotation for the tilt movement of the load-bearing support 10. The cylinder housing 30 thereby acts as sliding guide for the vertical rotational movement of the load-bearing support 10. The upper straight area of the intermediate bar 34 furthermore works as limitation of the vertical tilt, in that the upper holder 36 strikes against the intermediate bar on the top via the longitudinal slit.

(7) A changeable wear bushing 39 is introduced between the cylinder housing 30 and the inner side of the upper holder 36 of the load-bearing support 10. In case of wear, this bushing 39 can be replaced easily and cost-efficiently.

(8) The majority of the rear part 38 of the load-bearing support 10 is open via a longitudinal slit. Together with the opening between the connecting elements 40a, 40b, this provides the operator of the industrial truck with an unobstructed view in the forward direction and onto a held load.

(9) FIG. 2 shows a section through the cylinder housing 30. The cylinder housing 30 houses the cylinders 31a, 31b, which, in turn, in each case have a piston rod 32a, 32b. These piston rods 32a, 32b in each case act directly against an end element 11a, 11b on each outer side of the load-bearing support 10. It can furthermore be seen in the sectional illustration that the load-bearing support 10 at least partially encompasses the cylinder housing 30 in a rotatable and slideable manner. The cylinders 31a, 31b have hydraulic connections 33a, 33b, which are arranged on the side of the cylinder housing (30), which faces the rear part 38 of the load-bearing support (10). The hydraulic connections are thus protected against external influences from the direction of the front part 35 of the load-bearing support 10.

(10) FIG. 3 shows a load-bearing support 10 according to the invention in backwards-tilted position. A load-bearing means, which is fastened to the load-bearing support 10, is tilted downwards as a result of the backwards tilt of the load-bearing support 10. It is advantageous, for example, to hold a pallet with forks, which are tilted downwards, so as to counteract the risk that the forks catch on the pallet while moving the pallet downwards and displace the pallet. After the forks have been positioned below the pallet to the desired extent, the tilt can be adjusted, so that the pallet can be lifted horizontally. The tilt can also be adjusted to such an extent hereby that the forks are tilted at least slightly upwards, because the stability of the load on the forks is thus increased during the transport and the deflection of the forks is counteracted in the case of a heavy load. For adjusting the tilt, the piston rod of the hydraulic cylinder 50 is retracted. By linking the piston rod of the hydraulic cylinder 50 to the lower holder 37, the load-bearing support rotates about the longitudinal axis of the cylinder housing 30. The upper holder (36) of the load-bearing support (10) encompasses approximately 78% of the cylinder housing (30) in a rotatable and shiftable manner. A larger section modulus against a lifting of the load-bearing support (10), for example in response to retraction after setting down a load on a shelf, for example, is reliably prevented through this, without requiring further measures. In addition, the free cross section, through which the driver of the industrial truck can see, is not further limited. The weight of the load-bearing support (10) is furthermore not increased by means of further components, which has an advantageous impact on the maximally liftable pay load and the energy efficiency in response to the operation of the industrial truck.

(11) FIG. 4 shows a load-bearing support according to the invention in forward-tilted position. A load-bearing means, which is fastened to the load-bearing support 10, is tilted upwards by tilting the load-bearing support 10 forwards.

(12) The embodiments shown here only represent examples for the invention at hand and must thus not be understood as being limiting. Alternative embodiments considered by the person of skill in the art are similarly covered by the scope of protection of the invention at hand.

LIST OF REFERENCE NUMERALS

(13) 110 load-bearing support 11a, 11b end element 12a, 12b mast jaw, connecting element 30 cylinder housing 31a, 31b cylinder 32a, 32b piston rod 33a, 33b hydraulic connection 34 intermediate bar 35 front part 36 upper holder 36a longitudinal slit 37 lower holder 38 rear part 39 wear bushing 40a, 40b connecting element 50 hydraulic cylinder