Metal working – Method of mechanical manufacture – Structural member making
Reexamination Certificate
1999-04-14
2001-09-04
Rosenbaum, I Cuda (Department: 3726)
Metal working
Method of mechanical manufacture
Structural member making
C029S421100, C072S061000, C296S205000
Reexamination Certificate
active
06282790
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to space frames for motor vehicles.
BACKGROUND OF THE INVENTION
It is known in the automotive industry to provide a vehicle space frame which can be used to mount various components and body panels for the motor vehicle. Typically, the space frame is made from many frame structures which are joined together by welding or other types of connections. The numerous connections that are typically required to form a space frame from the frame structures leads to tolerance build-up, which causes dimensional accuracy problems in the space frame.
It is an object of the invention to provide a space frame that requires fewer parts and fewer connections than the conventional space frame, so that a space frame of greater dimensional accuracy can be produced.
In accordance with this object, the present invention provides a space frame for a motor vehicle, comprising a first hydroformed, longitudinally extending tubular lower side rail member, and a second hydroformed, longitudinally extending tubular lower side rail member, the lower side rail members being laterally spaced from one another. Also included is a pair of hydroformed tubular upper longitudinal members, each being an integrally formed member fixed to an associated one of the lower side rail members. The structure of each upper longitudinal member includes a longitudinally extending portion constructed and arranged to support a roof of the motor vehicle, each longitudinally extending portion extending longitudinally between an upper end of an A-pillar structure provided by the space frame and an upper end of a rearward-most pillar structure of the space frame. The hydroformed tubular upper longitudinal members thus define lengths between the vehicle A-pillar structures and the rearward-most structures of the space frame. Laterally extending connecting structure connects the lower side rail members to one another.
The object of the present invention can be achieved by other structural components, as well as various method of manufacture. For example, in one method of the invention, the following steps are performed: placing a tubular metal blank having a generally U-shaped configuration into a hydroforming die assembly, the die assembly having die surfaces defining a die cavity; providing pressurized fluid to an interior of the tubular metal blank so as to expand the blank into conformity with the die surfaces of the die cavity and thereby form a U-shaped hydroformed cross member; positioning first and second lower side rail members in laterally spaced relation to one another; connecting a first end of the hydroformed cross member to the first lower side rail member; and connecting a second end of the hydroformed cross member to the second lower side rail member.
Because fewer parts are required in accordance with the space frame of the present invention, assembly is made much simpler.
SUMMARY OF THE INVENTION
An object of the present invention is to meet the need expressed above by providing a space frame comprising a pair of laterally spaced, longitudinally extending side rail structures and longitudinally spaced pairs of corresponding laterally spaced upright structures having joints at their lower ends with the pair of side rail structures and extending upwardly therefrom defining a plurality of pairs of pillars including a pair of forward A pillars, a longitudinally spaced pair of B pillars, and a longitudinally spaced pair of rearward end pillars. A pair of the side roof structures are integral with the pair of A pillars. The pair of side roof structures extend longitudinally rearwardly from the pair of A pillars and the pair of side roof structures have joints with the pair of B pillars and the pair of rearward end pillars. Longitudinally spaced cross structures have joints with the pair of side rail structures, the pair of A pillars and the pair of side roof structures. A front structural assembly has joints with a forward end of the pair of side rail structures and with the A pillars at positions spaced upwardly of the pair of side rail structures. A plurality of all of the structures are hydroformed members, each hydroformed member being defined by an irregularly, outwardly deformed tubular metallic wall fixed into a predetermined irregular exterior surface configuration. The hydroformed members include a pair of hydroformed members forming the pair of side roof structures integral with the A pillars and having more than two spaced successive joints which determine defining longitudinal lengths in the space frame.
REFERENCES:
patent: 1581931 (1926-04-01), Lamplugh
patent: 1846567 (1932-02-01), Murray, Jr.
patent: 2389907 (1945-11-01), Helmuth
patent: 2668722 (1954-02-01), Muller
patent: 3159419 (1964-12-01), Kerby
patent: 3630056 (1971-12-01), Cuq
patent: 3971588 (1976-07-01), Bauer
patent: 4355844 (1982-10-01), Muzzarelli
patent: 4471519 (1984-09-01), Capello et al.
patent: 4618163 (1986-10-01), Hasler et al.
patent: 4660345 (1987-04-01), Browning
patent: 4726166 (1988-02-01), DeRees
patent: 4735355 (1988-04-01), Browning
patent: 4759111 (1988-07-01), Cudini
patent: 4986597 (1991-01-01), Clausen
patent: 5094313 (1992-03-01), Mauws
patent: 5096254 (1992-03-01), Sparke
patent: 5106249 (1992-04-01), Janotik
patent: 5209541 (1993-05-01), Janotik
patent: 5213386 (1993-05-01), Janotik et al.
patent: 5228259 (1993-07-01), Haddad et al.
patent: 5233789 (1993-08-01), Priest et al.
patent: 5233856 (1993-08-01), Shimanovski et al.
patent: 5269585 (1993-12-01), Klages et al.
patent: 5271687 (1993-12-01), Holka et al.
patent: 5320403 (1994-06-01), Kazyak
patent: 5332281 (1994-07-01), Janotik et al.
patent: 5333775 (1994-08-01), Bruggemann et al.
patent: 5338080 (1994-08-01), Janotik et al.
patent: 5343666 (1994-09-01), Haddad et al.
patent: 5458393 (1995-10-01), Benedyk
patent: 5518209 (1996-05-01), Chicoine et al.
patent: 5549352 (1996-08-01), Janotik et al.
patent: 5557961 (1996-09-01), Ni et al.
patent: 5561902 (1996-10-01), Jacobs et al.
patent: 5564785 (1996-10-01), Schultz et al.
patent: 5577796 (1996-11-01), Clausen
patent: 5582052 (1996-12-01), Rigsby
patent: 5600983 (1997-02-01), Rigsby
patent: 5603581 (1997-02-01), Fujita et al.
patent: 5641176 (1997-06-01), Alatalo
patent: 5649735 (1997-07-01), Tomforde et al.
patent: 5673929 (1997-10-01), Alatalo
patent: 5718048 (1998-02-01), Horton et al.
patent: 5720092 (1998-02-01), Ni et al.
patent: 5720511 (1998-02-01), Benedyk
patent: 5765906 (1998-06-01), Iwatsuki et al.
patent: 5794398 (1998-08-01), Kaehler et al.
patent: 5800003 (1998-09-01), Clenet
patent: 5845382 (1998-12-01), Schultz et al.
patent: 5848853 (1998-12-01), Clenet
patent: 867 059 (1953-02-01), None
patent: 4122862 (1993-01-01), None
patent: 0 570 150 A1 (1993-11-01), None
patent: 694 774 (1930-12-01), None
patent: WO 97/00595 (1997-01-01), None
International Search Report re: PCT/CA98/00962 dated Feb. 17, 1999.
Hanicke et al.,IBEC 96, Detroit, “Lighter Car Body in Aluminum with Hydroforming Technology R&D Results”, Oct. 1-3.
Gabbianelli Gianfranco
Horton Frank A.
Jaekel Fred G.
Cosma International Inc.
Cuda Rosenbaum I
Nguyen Trinh
Pillsbury & Winthrop LLP
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