Land vehicles – Wheeled – Attachment
Patent
1998-05-26
1999-10-05
Mai, Lanna
Land vehicles
Wheeled
Attachment
280764, 2807661, 212304, B60S 902
Patent
active
059611456
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention is related to a mobile machine, having a multi-axle vehicle chassis carrying the machine and at least one supporting strut which is pivotal about a pivot axis parallel to the vertical axis of the vehicle on the vehicle chassis or a support frame fixed to the vehicle chassis from an inoperative position in which it is pivoted against a longitudinal side of the chassis into a laterally pivoted supporting position, the free end of which supporting strut is adapted to be supported on the ground by means of a preferably vertically extendable foot portion.
2. Description of the Related Art
In a known mobile machine of this type it is known (DE-A-44 28 069) to pivot the supporting struts, which are connected to a support frame of the chassis pivotal about a horizontal pivot axis, with respect to the chassis by means of double-acting hydraulic cylinders. In the course of the pivoting action, the supporting struts attain an outermost pivot position which is given by the arrangement of the hydraulic cylinders. However, a uniquely defined pivotal positioning of the supporting struts with respect to the chassis is not ensured thereby. Since the supporting struts have to divert the vertical forces imposed on the chassis by the machine as well as the horizontal forces into the ground, pivoting may occur in the region of the supporting struts due to moments and lateral forces occurring during the operation of the machine, which lead to position changes of the machine. This is of disadvantage especially when an exact positioning of the machine during its operation is important, as for instance during washing of airplanes with large manipulators functioning as the machine.
Based on this, it is the object of the invention to improve a mobile machine of the type described above with respect to the arrangement of its supporting struts such that a transmission of both vertical and horizontal forces to the ground without play and slip in the region of the supporting struts becomes possible.
SUMMARY OF THE INVENTION
The solution according to the invention is based on the idea that the supporting struts are secured against rotation in the region of their pivot bearing in the laterally pivoted position. According to the invention, this is obtained by providing a locking mechanism which prevents the supporting strut from rotating about its pivot axis in its laterally pivoted supporting position.
According to a preferred embodiment of the invention it is provided that the supporting strut in its laterally pivoted supporting position, is limitedly movable with respect to the chassis between a locking position and a releasing position of the locking mechanism, parallel to its pivot axis. To this end, the locking mechanism may comprise a claw coupling which is disposed between axially facing, strut-fixed and chassis-fixed surfaces, and which is adapted to be engaged without free play in the laterally pivoted supporting position by axial lifting of the supporting strut. The movement is expediently effected by at least one lifting member which is disposed between the chassis or the support frame on the one hand and the supporting strut on the other hand, and which is preferably designed to be a hydraulic cylinder. According to an advantageous design, the supporting strut is borne between two chassis-fixed bearing brackets which are disposed spaced at a distance above each other, such that it can be pivoted as well as lifted and lowered.
According to a preferred embodiment of the invention it is provided that the supporting strut is adapted to be limitedly pivotal about the pivot axis by means of a preferably hydraulic motor. In order to be able to hold the supporting strut in its laterally pivoted end position after a pivot movement has been performed and until the securing by means of the locking mechanism can be effected, it is of advantage when the motor comprises a braking or locking member which is adapted to be operated independently of the locking mechanism. I
REFERENCES:
patent: 769461 (1904-10-01), Bennett
patent: 3854595 (1974-12-01), Kuhn
patent: 4394913 (1983-07-01), Lanning et al.
patent: 4761021 (1988-08-01), Lagsdin
patent: 5015008 (1991-05-01), Schupback
patent: 5135145 (1992-08-01), Hannes et al.
patent: 5706960 (1998-01-01), Pitman et al.
Lorincz Klaus
Schillinger Hans-Dieter
Mai Lanna
McClellan James S.
Putzmeister Aktiengesellchaft
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