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Lift truck with a support leg arrangement

A technology of lifting rods and forklifts, which is applied in the field of lifting rods of high-rise shelf forklifts to achieve the effect of avoiding pressure balance and reducing dynamic deformation

Inactive Publication Date: 2007-07-11
JUNGHEINRICH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The crane must be equipped with complex additional mechanisms for this purpose

Method used

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  • Lift truck with a support leg arrangement
  • Lift truck with a support leg arrangement
  • Lift truck with a support leg arrangement

Examples

Experimental program
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Embodiment Construction

[0030] FIG. 1 schematically shows a lifting mast with a fixed mast frame 10 which can generally be mounted on a high-bay forklift. Two hydraulic cylinders 14 , 16 , which are connected to the upper cross member 18 of the moving rod frame 20 , are mounted on the lower cross member 12 of the fixed rod frame. Arrows 22 and 24 indicate different lifting forces leading to a lateral bending moment 26 . In the embodiments described later, bending is prevented despite the load generating a bending moment.

[0031] It can be seen in FIG. 2 that the hydraulic cylinders 14 , 16 are supplied with pressurized oil via a so-called flow divider or divider 30 . The divider ensures that both hydraulic cylinders 14 , 16 deliver the same quantity of pressurized oil independently of their load, so that hydraulic cylinders 14 , 16 carry out the same lifting stroke.

[0032] In FIG. 3 , instead of the single-acting cylinder 14 of FIG. 1 or 2 , a double-acting hydraulic cylinder 14 a is provided, t...

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PUM

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Abstract

The invention relates to a lifting mast, in particular for a high-bay stacker lift truck, having a fixed mast and at least one extendable mast section with two parallel lift drives arranged laterally on the mast for extending the mast section from the fixed mast and a control for the lift drives, wherein a regulating device is provided for the two lift drives for measuring a path difference in the lifting paths of the lift drives and the lift drives are controlled such that the path difference remains zero.

Description

technical field [0001] The invention relates to a lifting mast for a high-bay forklift, in particular according to claim 1 . Background technique [0002] Height-adjustable cranes are known in a variety of designs, for example as components of floor transport machines with a height lifting device. The goods to be transported are stored and unloaded at different heights by means of lifting racks, wherein the lifting goods move essentially vertically. [0003] Such lifts basically consist of an external fixed frame, within which the retrieval device moves directly. Such structures are relatively rare. In most cases, one or more moving rods move on fixed rods. On single and double telescopic lifts it is an internal travel bar. On triple telescoping lifts it is two and on quadruple telescoping lifts it is three internal travel rods. [0004] The single-bar frame consists of two side-supported profiles connected one above the other by crossbeams. The transmission of the ben...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66F9/22
CPCB66F9/08B66F9/22
Inventor J·芬克P·克里斯H·施罗德
Owner JUNGHEINRICH AG