Industrial truck comprising a load frame

Abstract

An industrial truck includes a drive part with a drive frame and a load part. The load part includes a lift frame having a load frame, which includes a plate, a load-carrying means connected to the plate, and at least one bearing head configured to receive a lift cylinder. The at least one bearing head is connected to the plate.

Claims

1. An industrial truck comprising: a load part comprising a load frame, the load frame comprising, a plate, a load fork connected to the plate at a first end and extending from the plate to a free end, at least one bearing head connected to the plate and comprising, a bearing body coupled to the plate, and a bearing holder coupled to the bearing body configured to receive a lift cylinder that is configured to lift the load fork, two bearing blocks connected to the plate and each configured to support one of a pair wheel arms, and two push/pull rods, wherein each of the two push/pull rods is operatively coupled to a deflection lever, wherein each deflection levers is connected to the plate, wherein the plate extends along a vertical plane between the pair of wheel arms and the at least one bearing head, wherein the plate comprises a contiguous solid surface extending between the pair of wheel arms and from each of the pair of wheel arms to the at least one bearing head, and wherein a movement of the lift cylinder is deflected to each of the two push/pull rods.

2. The industrial truck according to claim 1, wherein each of the pair of wheel arms includes an attached end and an opposing free end, and wherein each of the pair of wheel arms comprises a load roller at the free end that is configured for an initial lift that can be adjusted by a push/pull rod.

3. The industrial truck according to claim 2, where in the plate is arranged in a region between the bearing head and the pair of wheel arms.

4. The industrial truck according to claim 1, further comprising at least one reinforcing plate configured to connect the at least one of the two bearing blocks and the plate are connected to one another.

5. The industrial truck according to claim 4, further comprising a butt joint positioned between the plate and the at least one reinforcing plate.

6. The industrial truck according to claim 1, wherein at least one reinforcing plate is connected to each of the pair of wheel arms, each of the two bearing blocks, and the plate.

7. The industrial truck according to claim 1, wherein the bearing head comprises a square base plate, and wherein the square base plate is connected to the plate of the load frame in a planar manner.

8. The industrial truck according to claim 1, wherein the at least one bearing head is configured as an abutment for the lift cylinder.

9. The industrial truck according to claim 1, wherein the at least one bearing head and the two bearing blocks are coupled to a same side of the plate.

10. The industrial truck according to claim 1, wherein the plate includes a surface that faces towards the free end and an opposing surface that faces away from the free end of the load fork, and wherein the at least one bearing head is positioned on the opposing surface of the plate.

11. The industrial truck according to claim 1, wherein the at least one bearing head is configured to be directly coupled to the plate.

12. The industrial truck according to claim 1, wherein the plate is manufactured as a single solid component and is comprised of a metal.

13. The industrial truck according to claim 12, wherein the load frame comprises a plate thickness of 15 to 45 mm.

14. The industrial truck according to claim 12, wherein the load frame comprises a plate thickness of 20 to 70 mm.

15. The industrial truck according to claim 1, wherein the plate extends between a base of the pair of wheel arms and the at least one bearing head.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Two preferred embodiments of the invention will be explained in more detail below with reference to the figures, in which:

(2) FIG. 1 illustrates a perspective view obliquely from below a load frame having two wheel arms attached thereto for a low-lift truck;

(3) FIG. 2 illustrates a perspective view obliquely from above of the load frame from FIG. 1;

(4) FIG. 3 illustrates a perspective view obliquely from above of a load frame having wheel arms and additional reinforcing plates; and

(5) FIG. 4 illustrates a perspective view obliquely from below of the load frame from FIG. 3.

DETAILED DESCRIPTION OF THE INVENTION

(6) FIG. 1 shows a load frame 10, which has a solid plate 12 made of metal. The metal plate 12 is also referred to as a monoplate. The plate 12 has a substantially rectangular basic shape, wherein cutouts 18, 20 are provided in the region of the wheel arms 14, 16 and can partially receive the wheel arms 14 and 16 due to their shape and position. The plate 12 also comprises cutouts 22, 24 on the side opposite the wheel arms 14, 16, in the region of the corners.

(7) A bearing head 26 is connected to the plate 12 in the center of the upper region. The bearing head 26 comprises a main body 28 connected to the plate 12 and a bearing holder 30 attached to said main body. The bearing holder 30 is configured to receive a lift cylinder (not shown) that is provided for raising and lowering the load frame, and is thus configured to raise the entire load frame. In a manner known per se, the wheel arms 14, 16 comprise load rollers 32, 34 that can be actuated by means of push/pull rods 36, 38 for an initial lift. The push/pull rods 36, 38 are actuated by respective three-point levers 42, 40. The free lever ends are for example hinged on the vehicle frame, such that, when the load frame is raised, the three-point lever 40, 42 pivots about a fixed pivot point on the load frame and actuates the push/pull rod 36, 38 with its third end.

(8) FIG. 2 shows a modified perspective view clearly showing the bearing blocks 44, 46 that support the connection of the wheel arms 14, 16 on the plate 12. The bearing blocks 44, 46 have a prism shape with a triangular cross-section. One leg of the bearing blocks 44, 46 rests on the plate 12 in a planar manner and the bearing blocks comprise a recess that leaves free space for the three-point lever 42, 40. On the end pointing away from the plate 12, the bearing blocks comprise the bearing point for the central bearing of the three-point lever 42, 40. One portion 48, 50 of the wheel arms 14, 16 projects beyond the plate 12, such that the bearing block can rest on the projecting portions 48, 50. The joining of the bearing plate and wheel arms and of the bearing block 44, 46 and wheel arms 14, 16 gives the connection sufficient stability.

(9) In the invention, the plate 12 replaces the otherwise typical box structure in the load frame. Even in the case of very narrow batteries, the use of the plate 12 means a reduction in the length of the vehicle. The bearing blocks 44, 46, together with the plate 12, form a sufficiently long and stable connection for the wheel arms. In addition, the bearing blocks form a triangle on the plate together with the bearing head 26, which triangle ensures that the forces are introduced into the plate without the risk of deforming said plate. It is also clear that, in addition to the reduced vehicle length, the small number of components also reduces manufacturing costs and the amount of handling and joining work associated with a higher quantity of parts. Furthermore, as a solid metal component, the plate has a low vertical range of manufacture, which produces a good cost-to-weight ratio. Another advantage of the design according to the invention is that high load capacities are possible, since there is a direct flow of force without the force having to be deflected and without joint connections having to be subjected to stress. In addition, the load frame presented is easily accessible, which also facilitates maintenance and servicing work.

(10) FIGS. 3 and 4 show an embodiment of the load frame for raising larger loads of the like provided in a double stacker truck, for example. The plate 12 can clearly be seen to have a greater thickness than plate 12. Aside from the plate 12, other components in this exemplary embodiment have been assigned the same reference signs as in the first exemplary embodiment, even if they have different dimensions or if they have a different design, as in the region of the free ends of the wheel arms 14, 16.

(11) The load frame from the exemplary embodiment in FIGS. 3 and 4 comprises reinforcing plates 52, 54, 56 that adjoin the plate 12 by a butt joint so as to form a T-shape. As shown by way of example in FIG. 4, the reinforcing plates extend on both sides of the plate 12 and provide a sufficiently long edge in the direction of the wheel arms 14, 16 for connection to side walls of the wheel arms 14, 16. The connection of the wheel arms takes place on three sides. Each wheel arm has a U-shaped profile, wherein the bearing blocks 44, 46 act on the leg of the U-profile that forms the base. In addition, the plate 12 may also be connected to this leg of the wheel arm. If a cutout is provided in the plate 12 for connecting the wheel arms 14, 16, said connection may also extend to the side legs of the wheel arms. The side legs of the wheel arms are also connected via the reinforcing plates 52, 54, 56. The reinforcing plates are also connected to the plate 12. The additional reinforcing plates allow for the wheel arms to be connected in a sufficiently rigid manner and in a manner stable enough to lift larger loads.

LIST OF REFERENCE SIGNS

(12) 10 Load frame 12 Plate 12 Plate 14 Wheel arm 16 Wheel arm 18 Cutout 20 Cutout 22 Cutout 24 Cutout 26 Bearing head 28 Main body 30 Bearing holder 32 Load roller 34 Load roller 36 Push/pull rod 38 Push/pull rod 40 Three-point lever 42 Three-point lever 44 Bearing block 46 Bearing block 48 Portion 50 Portion 52 Reinforcing plate 54 Reinforcing plate 56 Reinforcing plate