Ground vehicle with load frame

Abstract

The invention relates to a ground vehicle, in particular a low-lift vehicle or a double-decker vehicle, having a drive part comprising a drive frame and a load part comprising a lift frame, the lift frame having a load frame with a load support mechanism and at least one bearing head for a lifting cylinder, wherein the load frame has a plate on which the at least one bearing head and the load support mechanism are mounted.

Description

Technical Field

[0001] This invention relates to a ground transport vehicle with a load-bearing frame, particularly a lift vehicle for low lift or double lift (Doppelstockhub). Background Technology

[0002] A lifting vehicle is known from DE 10 2019 101 864 A1. The lifting vehicle has a drive component and a load component, the load component being supported on the drive component and having an initial lift height adjustable relative to the drive component. A drive frame of the drive component supports the components of the lifting vehicle. The load component has a load frame having wheel arms extending along the longitudinal axis of the vehicle away from the load frame. The wheel arms have wheels at their free ends for supporting the wheel arms and the vehicle, respectively. A battery powering the drive of the lifting vehicle is housed in the drive frame, wherein the drive frame has a closed receiving space relative to the load frame, and components of the drive component are disposed in the receiving space, wherein the receiving space extends into the load frame and upwardly limits the initial lift of the load component. In known structures, the battery is housed in the drive frame, thereby freeing up space in the load frame to accommodate components in the drive component.

[0003] A ground transport vehicle with a closable battery compartment is known from DE 10 2011 015 936 A1. The battery compartment forms a box-shaped portion of a load frame, with a wheel arm fixed to the load frame and a lifting cylinder acting on the load frame.

[0004] In known ground transportation vehicles, especially in lift vehicles and particularly in devices for low or double-lift configurations, a typical basic structure exists where the drive frame is configured as a chassis support and component support. A box-shaped load frame serves as both a battery housing and a load support, and in the case of double-lift devices, it also serves as a support for components supporting the lift platform. An important aspect of the known load frame is that it provides stable components for the vehicle's load-bearing parts through its frame structure, which uses relatively little material, while simultaneously determining the driving force based on the weight of the battery. Summary of the Invention

[0005] The purpose of this invention is to provide a ground transport vehicle with a load frame that provides a load frame that is as stable as possible in terms of weight and cost.

[0006] According to the invention, the objective is achieved by a ground transport vehicle having the features of claim 1. Advantageous design solutions form the technical solutions of the dependent claims.

[0007] The ground transport vehicle according to the invention is particularly configured as a lift vehicle with low or double lift. The ground transport vehicle has a drive component including a drive frame and a load component including a lift frame. The lift frame has a load frame with a load support mechanism and a support head for the lifting cylinder. In the vehicle according to the invention, the load frame is lifted by the support head. According to the invention, the load frame has a solid plate, and the support head and load support mechanism are mounted on the solid plate. The solution according to the invention specifies the use of a load frame without the battery box structure commonly used to date. Thus, the load frame is significantly shorter in size. The requirements for weight, rigidity, and low cost can be met by using a solid plate preferably having a predetermined minimum thickness. For stability and weight reasons, the plate is preferably made of metal, especially steel.

[0008] In a suitable further extension of the ground transportation vehicle, a battery for the vehicle is provided in the drive unit. In the drive unit, the battery is securely mounted into the ground transportation vehicle, for example, and can be connected to the drive frame, and remains in the ground transportation vehicle during the charging process.

[0009] In a preferred design, the load support mechanism includes a pair of arm booms, each arm having a load roller at its free end for initial lifting, the load roller being adjustable via a lever / pull rod. The use of levers / pull rods for initial lifting is well known in the prior art. Typically, the lifting motion of the lifting cylinder is directed to the lever / pull rod of the load fork via a steering lever, usually a three-point lever. For this purpose, it is preferable to provide a support for each arm boom, which is fastened to a plate. The support supports both the arm boom and the steering lever, by which the motion of the lifting cylinder is directed to the lever / pull rod of the load fork. The load support mechanism can typically be any load-bearing mechanism and can, for example, be formed by a pair of fork teeth.

[0010] In a preferred further extension of the ground transport vehicle according to the invention, at least one reinforcing plate may be provided between the support seats, through which the support seats and the plates are connected to each other. In a preferred design, the plates and the reinforcing plates are connected to each other via a butt joint, wherein the plates of the load frame stand vertically to the reinforcing plates. The reinforcing plates may also be connected to the two wheel arms, for example, via a butt joint. For this purpose, the reinforcing plates are disposed between the wheel arms and connected to the wheel arms along the joint points of the wheel arms, for example, by welding.

[0011] Furthermore, it is specified that the support head for the lifting cylinder has a rectangular base plate, which is connected to the load frame in a plate-like manner. Preferably, the support head has a receiving portion for the lifting cylinder, which allows the force of the lifting cylinder to be transmitted to the load frame.

[0012] The predetermined thickness of the plate has proven particularly advantageous, with thicknesses ranging from 15mm to 45mm in low-lift vehicles and from 20mm to 70mm in double-decker vehicles. At this thickness, the plate provides sufficient weight and stability. It is also due to these dimensions that no additional reinforcements or fasteners are required in the area between the support head and the load-bearing mechanism. It has also been proven that no additional reinforcements or fasteners are needed on the plate at all. A particular advantage of the solid plate is that it compensates for the reduced weight when using lithium-ion batteries.

[0013] Preferably, the at least one support head is configured as a support for the lifting cylinder, wherein multiple support heads may also be used when the vehicle is equipped with multiple lifting cylinders. Attached Figure Description

[0014] The following figures illustrate two preferred embodiments of the invention in more detail. In the figures:

[0015] Figure 1 The load frame for a low-lift vehicle is shown in a perspective view from the lower oblique angle, the load frame having two mounted wheel arms.

[0016] Figure 2 Shown from an oblique, overhead perspective Figure 1 The load frame in

[0017] Figure 3 The load-bearing frame with wheel arms and additional reinforcing plates is shown in a perspective view from an oblique top.

[0018] Figure 4 Shown from a perspective view at an angle below Figure 3 The load framework in the system. Detailed Implementation

[0019] Figure 1 A load frame 10 is shown, having a solid plate 12 made of metal. The metal plate 12 is also referred to as a monoplatte. The plate 12 has a generally rectangular basic shape, with gaps 18 and 20 provided in the regions of the wheel arms 14 and 16, the gaps being shaped and positioned to partially accommodate the wheel arms 14 and 16. On the sides opposite to the wheel arms 14 and 16, the plate 12 also has gaps 22 and 24 in the corner regions.

[0020] At the center of the upper region, a support head 26 is connected to a plate 12. The support head 26 has a base 28 connected to the plate 12 and a support receiving portion 30 mounted on the base. The support receiving portion 30 is configured to accommodate a lifting cylinder (not shown) for raising and lowering the load frame, and thus raise the entire load frame. The wheel arms 14, 16 have load rollers 32, 34 in a manner known per se, which can be operated by pressure / pull rods 36, 38 for initial raising and lowering. The pressure / pull rods 36, 38 are operated by three-point levers 42, 40, respectively. Free lever ends are, for example, hinged to the frame, so that when the three-point levers are raised, the three-point levers 42, 40 pivot about a fixed pivot point on the load frame and the pressure / pull rods 36, 38 are operated by the third end of the three-point levers.

[0021] Figure 2 The supports 44 and 46, which assist the connection of the wheel arms 14 and 16 to the plate 12, are clearly shown in a modified perspective view. The supports 44 and 46 have a prismatic shape with a triangular cross-section. The supports 44 and 46 rest on the plate 12 in a leg-like manner and have a clearance that allows free space for the three-point levers 42 and 40. At the end away from the plate 12, the supports have support points for the intermediate support portion of the three-point levers 42 and 40. The wheel arms 14 and 16 protrude from the plate 12 in sections 48 and 50, allowing the supports to be mounted onto these protruding sections. The connection between the support plate and the wheel arms, and between the supports 44 and 46 and the wheel arms 14 and 16, provides sufficient stability to the connection.

[0022] In this invention, the plate 12 is used instead of the commonly used box-shaped structure in the load frame. Even when the battery is designed to be very narrow, the use of plate 12 means a reduction in vehicle length. Supports 44, 46, together with plate 12, form a sufficiently long and stable connection for the wheel arms. Furthermore, the supports, together with support heads 26, form a triangle on the plate, which ensures that forces are directed into the plate without the risk of deformation. It is also evident that, in addition to the reduced vehicle length, there is a reduction in the number of components, manufacturing costs, and the operational and assembly costs associated with a higher number of components. Moreover, the plate, as a solid metal component, has a small machining depth, resulting in a good cost-to-weight ratio. Another advantage of the structure according to the invention is that high loads can be achieved because of the direct force flow, without the need for force redirection or required joint connections. Furthermore, the proposed load frame provides good accessibility, thereby facilitating maintenance and servicing.

[0023] Figure 3 and Figure 4A design of a load frame is shown, which is configured to lift large loads, for example, in a double-lift configuration. It can be seen that plate 12' has a greater thickness than plate 12. Apart from plate 12', other components in this embodiment use the same reference numerals as in the first embodiment, even if these other components are sized differently or have different designs, such as in the areas at the free ends of the wheel arms 14, 16.

[0024] exist Figure 3 and Figure 4 In this embodiment, the load frame has reinforcing plates 52, 54, and 56, which are T-shaped and abutted against plate 12' via butt joints. For example, also... Figure 4 As can be seen, the reinforcing plate extends on both sides of plate 12' and provides a sufficiently long edge in the direction of wheel arms 14, 16 for connection to the side walls of wheel arms 14, 16. Here, the wheel arms are connected on three sides. Each wheel arm has a U-shaped profile, wherein support seats 44, 46 act on legs of the U-shaped profile, the legs forming the bottom. Furthermore, plate 12' can also be connected to the legs of the wheel arms. If a gap is provided in plate 12' to connect wheel arms 14, 16, the connection can also extend to the side legs of the wheel arms. Furthermore, each side leg of the wheel arm is connected by reinforcing plates 52, 54, 56. Therefore, the reinforcing plate is connected to plate 12'. The additional reinforcing plates enable a sufficiently robust connection of the wheel arms, and the connection is also stable enough to lift large loads.

[0025] List of reference numerals

[0026] 10 Load Frame

[0027] 12 boards

[0028] 12' board

[0029] 14-wheel boom

[0030] 16-wheel boom

[0031] 18. Gap

[0032] 20. Void

[0033] 22. Void

[0034] 24. Gap

[0035] 26 Support head

[0036] 28 matrix

[0037] 30 Support Receiving Part

[0038] 32 load rollers

[0039] 34 load rollers

[0040] 36 Compression / Tie Rods

[0041] 38 Compression / Tie Rod

[0042] 40 Three-point lever

[0043] 42 Three-point lever

[0044] 44 Support

[0045] 46 Support base

[0046] 48 sections

[0047] 50 sections

[0048] 52 Reinforcing Plate

[0049] 54 Reinforcing Plate

[0050] 56 Reinforcing Plate

Claims

1. A ground transportation vehicle comprising a drive component having a drive frame and a load component having a lifting frame, the lifting frame having a load frame (10) having a load support mechanism and at least one support head (26) for a lifting cylinder, characterized in that, The load frame (10) has plates (12, 12'), at least one support head (26) and the load support mechanism are mounted on the plates, the support head (26) has a base (28) connected to the plate (12) and a support receiving part (30) disposed on the base, the support receiving part accommodating a lifting cylinder for raising and lowering the load frame, the lifting cylinder raising the entire load frame, the load support mechanism having a pair of wheel arms (14, 16), each of the pair of wheel arms having a load roller (32, 34) at its free end for initial lifting, the load roller being adjustable by a pressure rod / pull rod (36, 38), and a support seat (44, 46) is provided on the plates (12, 12') for each of the wheel arms (14, 16), the support seat supporting the wheel arm (14, 16) and the steering lever of the pressure rod / pull rod (36, 38) for the load fork.

2. The ground transportation vehicle according to claim 1, characterized in that, The drive unit contains a battery for the vehicle.

3. The ground transportation vehicle according to claim 2, characterized in that, The battery is fixedly installed in the drive component.

4. The ground transportation vehicle according to claim 1, characterized in that, At least one reinforcing plate (52, 54, 56) is provided between the support seats (44, 46), and the support seats (44, 46) and the plates (12, 12') are connected to each other through the at least one reinforcing plate.

5. The ground transportation vehicle according to claim 4, characterized in that, There is a butt joint between the plate (12, 12') and the reinforcing plate (52, 54, 56).

6. The ground transportation vehicle according to claim 4, characterized in that, The reinforcing plates (52, 54, 56) are connected to the two wheel arms (14, 16).

7. The ground transport vehicle according to any one of claims 1 to 3, characterized in that, The support head (26) for the lifting cylinder has a square base plate that is planarly connected to the plates (12, 12') of the load frame (10).

8. The ground transport vehicle according to any one of claims 1 to 3, characterized in that, The support head (26) has a housing for the lifting cylinder.

9. The ground transport vehicle according to any one of claims 1 to 3, characterized in that, The load frame (10) is configured for low lift vehicles and has a plate thickness of 15 mm to 45 mm.

10. The ground transport vehicle according to any one of claims 1 to 3, characterized in that, The load frame (10) is configured for use in double-decker vehicles and has a plate thickness of 20 mm to 70 mm.

11. The ground transport vehicle according to any one of claims 1 to 3, characterized in that, No additional reinforcements or stiffeners are installed in the area between the support head and the load support mechanism.

12. The ground transport vehicle according to any one of claims 1 to 3, characterized in that, No additional reinforcements or strengthening parts are provided on the plate.

13. The ground transport vehicle according to any one of claims 1 to 3, characterized in that, The at least one support head is configured as a support for the lifting cylinder.

14. The ground transportation vehicle according to claim 1, characterized in that, The ground transport vehicle is a low-lift vehicle or a double-decker vehicle.

15. The ground transportation vehicle according to claim 9, characterized in that, The load frame (10) has a plate thickness of 20 mm to 30 mm.

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