A vehicle bumper system defined principally by outboard and inboard elongate beams which project transversely across the vehicle. The ends of the front and rear beams are joined by connecting points which function as energy-absorbing fulcrums or hinges, with the remainder of the front and rear beams
A vehicle bumper system defined principally by outboard and inboard elongate beams which project transversely across the vehicle. The ends of the front and rear beams are joined by connecting points which function as energy-absorbing fulcrums or hinges, with the remainder of the front and rear beams initially being free of direct structural connection. The front beam is outwardly curved so that the center portions of the front and rear beams define a gap therebetween. The rear beam has connections to the vehicle at two points spaced transversely inwardly from the end connections, which connections define inboard fulcrum or hinge points. The front and rear beams are each formed as elongate monolithic structures, such as of high strength steel, and have configurations which enable them to nest one within the other in the longitudinal direction of the vehicle.
대표청구항▼
1. A bumper system for attachment to an end of a vehicle, comprising:a first horizontally elongate beam positioned to extend transversely relative to a traveling direction of the vehicle;a second horizontally elongate beam positioned adjacent but inwardly of said first beam and extending transversel
1. A bumper system for attachment to an end of a vehicle, comprising:a first horizontally elongate beam positioned to extend transversely relative to a traveling direction of the vehicle;a second horizontally elongate beam positioned adjacent but inwardly of said first beam and extending transversely relative to said traveling direction;said first beam having an elongate center beam part which extends between a pair of first end portions as defined adjacent opposite ends of said first beam, said second beam having second end portions adjacent opposite free ends thereof, said second end portions being disposed adjacent said first end portions, respectively;a connecting structure joining each said first end portion to the adjacent second end portion, said connecting structures defining a pair of first energy-absorbing connections between said first and second beams adjacent opposite ends thereof;each of said first and second beams being of high strength steel and being substantially nonstressed when joined together by said connecting structures;said second beam being joined to mounting parts of said vehicle by a pair of sidewardly spaced connection structures which define a pair of second connections between said vehicle and said second beam, said second connections being spaced inwardly from said first connections so that said second beam includes an elongate center beam portion which extends between said second connections, and a pair of end beam portions which each extends from one of said second connections to the adjacent first connection;said first beam being preshaped so that said center beam part is bowed horizontally forwardly from said first end portions so as to be spaced forwardly from but generally horizontally aligned with the center beam portion of said second beam;one of said first and second beams having at least a horizontally oriented C-shaped cross section, the C-shaped cross section of said one beam opening toward the other of said first and second beams;whereby an external impact against said first beam transmits force to said pair of first connections to effect elastic deflection of said end beam portions and forward bowing of said center beam portion of said second beam.2. The bumper system according to claim 1, wherein said center beam part and said center beam portion can relatively move into at least partial nested engagement with one another in response to an external impact on said first beam.3. The bumper system according to claim 1, wherein said other beam has a hollow rectangular cross section which can relatively move into nested engagement within the C-shaped cross section of said one beam in response to an external impact against said first beam.4. The bumper system according to claim 1, wherein each said first connection comprises a rigid but deformable fulcrum structure for permitting energy-absorbing relative movement between the joined first and second end portions of said first and second beams.5. The bumper system according to claim 1, wherein the center beam part and the center beam portion are initially free of direct rigid connection therebetween to permit relative engaging movement therebetween in response to an external impact on said first beam.6. The bumper system according to claim 1, wherein a deformable energizing member is connected directly between the center beam part of said first beam and the center beam portion of said second beam to permit partial energy absorption and partial transference of force to the center beam portion of said second beam upon imposition of an external impact against said first beam.7. The bumper system according to claim 6, wherein said deformable energizing member includes a blocklike foam member or a foamed plastic member.8. The bumper system according to claim 2, wherein one of said center beam part and said center beam portion has upper and lower communication members fixed thereto and positioned for contacting engagement with the other of said center beam part and said center beam portion when said center beam part and said center beam portion move toward one another in response to an external impact against said first beam.9. The bumper system according to claim 1, wherein each of said first and second beams are of high-strength steel and are roll formed from steel.10. The bumper system according to claim 1, wherein said first and second end portions are nested one within the other at said first connections.11. The bumper system according to claim 10, wherein each said first connection is defined by a pair of vertically spaced, horizontally elongated welds connecting the first end portion to the respective second end portion.12. The bumper system according to claim 11, wherein each of said second connections is defined by a generally vertically elongate weld between said second beam and a respective said mounting part of said vehicle.13. The bumper system according to claim 1, wherein the center beam part is spaced forwardly from, and is free of direct connection with, said center beam portion.14. The bumper system according to claim 1, wherein said first beam has a C-shaped cross section defining a recess which opens rearwardly toward said second beam, said second beam having a hollow tubular cross section sized to at least partially nest within said recess, and said second end portions being nested into the recess defined in said first end portions at said connecting structures.15. The bumper according to claim 1, wherein said first beam comprises a hollow tubular member having a C-shaped cross section which opens rearwardly toward said second beam, and wherein said second beam comprises a hollow tubular member having a rectangular cross section which is sized to at least partially nest within the first beam.16. The bumper according to claim 1, wherein the first and second beams have overlapping top walls and overlapping bottom walls, and wherein said first connection creates a substantially rigid connection between the overlapping top walls and the overlapping bottom walls so that, upon an external impact against said first beam, some energy is absorbed at said first connection as energy is transferred to and through said first connection.
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이 특허에 인용된 특허 (31)
Nomiyama Tetsuo (1526 N. Century Santa Ana CA 92703), Angular impact absorbing device.
Klie Wolfgang (Korntal DEX) Fischer Wolfgang (Leinfelden-Echterdingen DEX) Tomforde Johann (Sindelfingen DEX) Kleiner Horst (Stuttgart DEX) Ellenrieder Gunther (Esslingen DEX), Bumper for a motor vehicle.
Masotti Maurizio (Saronno ITX) Zentile Antonio (Paderno Dugnano ITX) Cau Pasqualino (Oggiono ITX), Bumper for motorvehicles and the like, made of plastic materials, and having its cross section closed by a rear reinforc.
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