Metal deforming – With means to drive tool – With means to permit tool positioning
Patent
1996-01-29
1999-08-31
Larson, Lowell A.
Metal deforming
With means to drive tool
With means to permit tool positioning
72705, 254 2B, B21D 112
Patent
active
059439017
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an arrangement for an aligner for damaged vehicle bodywork and vehicle chassis and represents a further development of the aligner arrangement in accordance with Swedish Patent No. 7712423.
The aforementioned previously disclosed aligner arrangement has proved to be appropriate for the repair and alignment of damaged vehicles, most of all in conjunction with the alignment of damaged vehicle cabs and car bodywork. The advantages are largely attributable to the adaptability of the aligner arrangement to all forms of damage to a vehicle unit, as well as to the premises concerned. This was made possible by the fact that the aligner arrangement in question is a portable aligner equipped with folding wheels, which permit alternative positioning of the aligner unit in relation to the damaged vehicle and also permit the frame of the aligner to be lowered into contact with a workshop floor and secured to it by means of bolted connections or similar clamping devices. In the aforementioned previously disclosed embodiment, the aligner comprises a longitudinal alignment bar executed with a longitudinal guide for a carriage supported in such a way as to be capable of displacement. This is supported in roller bearings in the aligner and is equipped with alignment devices for exerting a pulling or pushing effect on the damaged vehicle unit. The force required for performing such operations is provided via controlled displacement movements of the carriage relative to the alignment bar, which movements are counterbalanced by servo-controlled actuating devices, for example hydraulic devices, anchored to the alignment bar. Forces acting obliquely in relation to the longitudinal extent of the alignment bar often make their effect felt during such operations. This imposes considerable stresses on the roller bearings and gives rise to high surface pressures in the bearing channels of the alignment bar, which stresses cause wear to take place which reduces the service life of said units.
The object of the present invention is to eliminate the aforementioned disadvantages and to increase the effective power range of such aligners, and also to facilitate the manageability of such aligners through a reduction in weight and a simplified wheel positioning mechanism. Like the previously disclosed aligner the present invention relates to a portable longitudinal aligner consisting of a lower part executed as a frame and an upper part, a so-called slide, mounted in it in such a way as to be capable of displacement, in conjunction with which the aligner is equipped with folding wheels capable of adjustment between a working position, in which the frame of the aligner is in contact with a floor or the like, and a transport position, in which the frame of the aligner adopts a free position relative to the floor. The invention is thus characterized essentially in that each of the wheels is mounted in such a way as to be capable of rotating at its free end on a wheel carrier which engages around the lower part and is pivotally mounted on the outsides of the lower part, and in that the wheels can be caused to oscillate about the fulcra of the wheel carrier via the force exerted on the web of the wheel carrier.
The arrangement in accordance with the invention is also characterized in that the wheel carrier consists of two two-armed lever arms, which at one end support the wheels and at the other end are capable of being assembled in such a way that they are rigidly connected to one another via a transverse bridge. The latter is preferably executed with a recess or the like intended to interact with a locking mechanism for the wheel carrier, which locking mechanism is pivotally mounted on the inside of the wheel carrier. When the bridge and the wheel carrier are adjusted to the transport position for the aligner, the locking mechanism automatically adopts a looking position against the lower part and locks the wheel carrier in the transport position. The locking mechanism can be disengaged from its locking functio
REFERENCES:
patent: 3122194 (1964-02-01), Bronson et al.
patent: 3698230 (1972-10-01), Buske
patent: 4281532 (1981-08-01), Covington
patent: 4309895 (1982-01-01), Samuelsson
patent: 5101654 (1992-04-01), Stevens
Josam Lastbilteknik AB
Larson Lowell A.
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