Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62D—MOTOR VEHICLES; TRAILERS
  • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
  • B62D25/20—Floors or bottom sub-units

Definitions

• the invention relates to a vehicle floor structure.
• JP-A-2002-321657 describes a vehicle floor structure including a plurality of beads provided in the vehicle fore-aft direction and extending in the vehicle width direction in a floor panel disposed between a side sill and an extension side member that extend in the vehicle fore-aft direction.
• rear walls of the beads in the vehicle fore-aft direction extend substantially perpendicularly to a direction of chippings, in other words, a collision direction of pebbles and the like that are thrown up by tires. This may cause damage to the floor panel and/or peel-off of a coating on the floor panel, and the peel-off of the coating may result in rust.
• the invention provides a vehicle floor structure that reduces the possibility that, for example, damage is caused or a coating is peeled off due to chippings, and makes it possible to ensure sufficient strength and rigidity of a floor panel.
• a vehicle floor structure includes a floor panel extending in a vehicle width direction and a vehicle fore-aft direction; and a reinforcing bead that is provided in the floor panel to extend in the vehicle width direction, and that includes a front wall and a rear wall in a manner such that the reinforcing bead protrudes upward in a vehicle height direction.
• the rear wall of the reinforcing bead includes a bent portion provided at an intermediate portion of the rear wall in the vehicle height direction, an upper wall portion provided above the bent portion in the vehicle height direction, and a lower inclined portion provided below the bent portion in the vehicle height direction.
• An inclination angle of the lower inclined portion with respect to a horizontal plane is smaller than an inclination angle of the upper wall portion with respect to the horizontal plane.
• the reinforcing bead which extends in the vehicle width direction and protrudes upward in the vehicle height direction, is provided in the floor panel.
• the bent portion is provided at the intermediate portion of the rear wall of the reinforcing bead in the vehicle height direction.
• the inclination angle of the lower inclined portion, which is provided below the bent portion in the vehicle height direction, with respect to the horizontal plane is smaller than the inclination angle of the upper wall portion, which is provided above the bent portion in the vehicle height direction, with respect to the horizontal plane.
• the lower inclined portion of the rear wall of the reinforcing bead is likely to be hit by chippings, and therefore, the inclination angle of the lower inclined portion with respect to the horizontal plane is made small, so that the collision angle at which chippings collide with the lower inclined portion is made small.
• the upper wall portion of the rear wall is less likely to be hit by chippings, and therefore, the inclination angle of the upper wall portion with respect to the horizontal plane is made large, so that sufficient strength and rigidity of the floor panel are ensured.
• the vehicle floor structure according to the above aspect has excellent effects of reducing the possibility that damage is caused or a coating is peeled off by chippings (i.e., improving chipping resistance), and ensuring sufficient strength and rigidity of the floor panel.
• the bent portion may be provided at an intersection between an extension line of the straight line and the rear wall or above the intersection in the vehicle height direction, when seen from a side of a vehicle.
• the bent portion is provided at the intersection between the extension line (i.e., the chipping trajectory) of the straight line and the rear wall or above the intersection in the vehicle height direction, when seen from the side of the vehicle.
• the lower inclined portion which includes a portion positioned below the trajectory of a chipping and is likely to be hit by chippings, has the small inclination angle with respect to the horizontal plane.
• the vehicle floor structure according to the aspect has an excellent effect of more effectively improving the chipping resistance and ensuring sufficient strength and rigidity of the floor panel.
• the straight line may be set so as to connect the corner portion at the lower end of the front wall to the grounding point of the tire when the vehicle is vacant.
• the straight line is set to connect the grounding point of the tire to the corner portion at the lower end of the front wall, and the bent portion is provided above,' in the vehicle height direction, the intersection between the extension line (i.e., the chipping trajectory) of the straight line and the rear wall. That is, at least when the driver is seated and the vehicle is traveling, the position of the floor panel is lower than that in the vacant vehicle. Therefore, at least when the driver is seated and the vehicle is traveling, the lower inclined portion below the bent portion, which is formed under a condition that the vehicle is vacant, is necessarily positioned below the trajectory of a chipping. Thus, it is possible to improve the chipping resistance and to ensure sufficient strength and rigidity of the floor panel, more reliably.
• the reinforcing bead may be disposed between two frame members that are provided in the floor panel to extend in the vehicle fore-aft direction; and an upper surface of the reinforcing bead, which is located between the front wall and the rear wall, may be formed such that a position of a central portion of the upper surface in the vehicle width direction is higher, with respect to a floor surface of the floor panel, than positions of both end portions of the upper surface in the vehicle width direction, when seen from a rear of a vehicle.
• the reinforcing bead which extends in the vehicle width direction, is disposed between two frame members that are provided in the floor panel to extend in the vehicle fore-aft direction.
• the central portion of the upper surface of the reinforcing bead in the vehicle width direction that is, the central portion of the upper surface located at the portion that is most disadvantageous in strength and rigidity, is positioned above the both end portions of the upper surface of the reinforcing bead.
• the vehicle floor structure according to the aspect has an excellent effect of more reliably improving the strength and rigidity of the floor panel.
• FIG. 1 is a plan view illustrating the entire configuration of a vehicle floor structure according to an embodiment
• FIG. 2 is a sectional view of the vehicle floor structure taken along line II-II in FIG. i;
• FIG. 4 is a schematic side view illustrating the positional relationship between an extension line (trajectory of a chipping) of a straight line connecting a grounding point of a tire to a corner portion at a lower end of a front wall of the reinforcing bead in a vacant vehicle, and a lower inclined portion of the reinforcing bead in the traveling vehicle;
• an extension line trajectory of a chipping
• FIG. 5 is a perspective view illustrating the reinforcing bead used in the vehicle floor structure.
• FIG. 6A is a perspective view illustrating a reinforcing bead used in a vehicle floor structure according to a comparative example
• FIG. 6B is a sectional view of the reinforcing bead in the vehicle fore-aft direction.
• FIGs. 1 to 5 A vehicle floor structure according to an embodiment of the invention will be described with reference to FIGs. 1 to 5.
• Arrow FR properly shown in the figures indicates the vehicle front side
• arrow UP indicates the vehicle upper side
• arrow OUT indicates the outside in the vehicle width direction.
• FIG. 1 is a plan view of a vehicle floor structure 10 of this embodiment.
• FIG. 2 is a sectional view of the vehicle floor structure 10 taken along line II-II in FIG. 1.
• FIG. 3A is a sectional view of the vehicle floor structure 10 taken along line IIIA-IIIA in FIG. 1.
• FIG. 3B is a rear view of a reinforcing bead.
• a floor panel 14 extending in the vehicle width direction and vehicle fore-aft direction is disposed in a vehicle lower portion 12 to which the vehicle floor structure 10 of this embodiment is applied.
• a floor tunnel 16 which protrudes upward in the vehicle height direction from a floor surface 14A of the floor panel 14 and has a substantially hat-shaped cross section, is provided to extend in the vehicle fore-aft direction, in a central portion of the floor panel 14 in the vehicle width direction.
• the floor tunnel 16 is unitarily formed with the floor panel 14.
• a reinforcement 18 as a frame member extending in the vehicle fore-aft direction is disposed below the floor tunnel 16 in the vehicle height direction.
• the reinforcement 18 has a shape that opens downward in the vehicle height direction and has a substantially hat-shaped cross section, and is disposed along a wall surface of the floor tunnel 16 (see FIG. 3A).
• Paired left and right flange portions 18A are formed in both side portions of the reinforcement 18 in the vehicle width direction. Upper surfaces of the flange portions 18A and a lower surface of the floor surface 14A of the floor panel 14 are disposed to make a surface contact, and are joined together by spot welding.
• An under-reinforcement 20 as a frame member extending in the vehicle fore-aft direction is disposed below the floor panel 14 in the vehicle height direction, at a position outside the reinforcement 18 in the vehicle width direction.
• the under-reinforcement 20 has a shape that opens upward in the vehicle height direction and has a substantially hat-shaped cross section.
• Paired left and right flange portions 20A are formed in both side portions of the under-reinforcement 20 in the vehicle width direction (see FIG. 3A).
• Upper surfaces of the flange portions 20A of the under-reinforcement 20 and the lower surface of the floor surface 14A of the floor panel 14 are disposed to make a surface contact, and are joined together by spot welding.
• FIG.l and FIG3A shows the right portion of the vehicle floor structure 10, .which is located on the right side, in the vehicle width direction, of the floor tunnel 16 provided in the central portion in the vehicle width direction, the vehicle floor structure 10 is symmetrical on both sides of the floor tunnel 16 in the vehicle width direction. Therefore the left portion of the vehicle floor structure is not shown.
• the floor panel 14 is provided with reinforcing beads (i.e., reinforcing protrusions) 30.
• the reinforcing beads 30, which protrude upward in the vehicle height direction and extend in the vehicle width direction, are disposed between the two frame members that are the under-reinforcement 20 and the reinforcement 18.
• the plurality of (three in this embodiment) reinforcing beads 30 extend substantially in parallel with each other, and the reinforcing beads 30 are arranged in the vehicle fore-aft direction. In this embodiment, the reinforcing beads 30 are arranged at substantially equal intervals in the vehicle fore-aft direction. Both end portions of the reinforcing beads 30 in the vehicle width direction are located at a position near the under-reinforcement 20 and a position near the reinforcement 18, respectively.
• the inclination angle of the lower inclined portion 31C, which is likely to be hit by chippings, with respect to the horizontal plane is smaller than the inclination angle of the upper wall portion 31B with respect to the horizontal plane, so that a collision angle at which chippings collide with the lower inclined portion 31C (i.e., an angle at which pebbles or the like directly hit the lower inclined portion 31C) is small, that is, the collision angle is prevented from increasing toward the right angle.
• the inclination angle of the upper wall portion 31B, which is less likely to be hit by chippings, with respect to the horizontal plane is larger than the inclination angle of the lower inclined portion 31C with respect to the horizontal plane, so that sufficient strength and rigidity of the floor panel 14 are ensured.
• the extension line of the straight line 56 (straight lines 56A, 56B, and 56C in FIG. 2) represents a trajectory of a chipping.
• the bent portion 31A of the reinforcing bead 30 is provided above, in the vehicle height direction, the intersection between the extension line of the straight line 56 (straight lines 56A, 56B, and 56C in FIG. 2) and the wall 30C.
• the lower inclined portion 31C which includes a portion positioned below the trajectory of a chipping and is likely to be hit by chippings, has the small inclination angle with respect to the horizontal plane, so that the collision angle, at which chippings collide with the lower inclined portion 31C, is made small.
• the bent portion 31 A of the reinforcing bead 30 may be provided at the intersection between the extension line of the straight line 56 (straight lines 56A, 56B, and 56C in FIG. 2) and the rear wall 30C.
• the straight line 56 is set to connect the grounding point 52 of the tire 50 to the corner portion 30D at the lower end of the front wall 30A of the reinforcing bead 30 when the vehicle is vacant.
• the straight line 56 is set, and the bent portion 31 A is provided above, in the vehicle height direction, the intersection between the extension line of the straight line 56 and the rear wall 30C. Accordingly, at least when a driver is seated, the vehicle is traveling, and the position of the floor panel 14 is lower than that in the vacant vehicle, the lower inclined portion 31C is necessarily below the trajectory of a chipping in the vehicle height direction.
• the height of the upper surface 30B of the reinforcing bead 30 is largest at a portion near a central portion of an area between the reinforcement 18 and the under-reinforcement 20 in the vehicle width direction (i.e., at a portion near a central portion of the reinforcing bead 30 in the vehicle width direction), that is, the height of the upper surface 30B is largest at the portion that is most disadvantageous in strength and rigidity. Accordingly, strength and rigidity of the floor panel 14 are improved.
• the rear wall 30C of the reinforcing bead 30 formed in the floor panel 14 is configured such that the inclination angle of the lower inclined portion 31C, which is provided below the bent portion 31 A in the vehicle height direction, with respect to the horizontal plane is smaller than the inclination angle of the upper wall portion 3 IB, which is provided above the bent portion 31 A in the vehicle height direction, with respect to the horizontal plane.
• the lower inclined portion 31C of the rear wall 30C of the reinforcing bead 30 is likely to be hit by chippings, and therefore, the inclination angle of the lower inclined portion 31C with respect to the horizontal plane is made smaller than the inclination angle of the upper wall portion 31B with respect to the horizontal plane, so that the collision angle at which chippings collide with the lower inclined portion 31C (the angle at which pebbles or the like directly hit the lower inclined portion 31C) is made small. This reduces the possibility that the lower inclined portion 31C is damaged or a coating on the lower inclined portion is peeled off due to chippings.
• the upper wall portion 31B of the rear wall 30C is less likely to be hit by chippings, and therefore, the inclination angle of the upper wall portion 31B with respect to the horizontal plane is larger than the inclination angle of the lower inclined portion 31C with respect to the horizontal plane, so that sufficient strength and rigidity of the floor panel 14 are ensured. Accordingly, sufficient strength and rigidity of the floor panel 14 are ensured, and chipping resistance is improved.
• the bent portion 31 A of the reinforcing bead 30 is provided above, in the vehicle height direction, the intersection between the rear wall 30C and the extension line (i.e., the trajectory of a chipping) of the straight line 56 (straight lines 56A, 56B, and 56C in FIG.2) connecting the grounding point 52 of the tire 50 to the corner portion 30D at the lower end of the front wall 30A of the reinforcing bead 30.
• the straight line 56 straight lines 56A, 56B, and 56C in FIG.2
• the lower inclined portion 31C which includes the portion positioned below the trajectory of a chipping and is likely to be hit by chippings, has the smaller inclination angle with respect to the horizontal plane than the inclination angle of the upper wall portion 31B with respect to the horizontal plane. Accordingly, it is possible to decrease the collision angle at which chippings collide with the lower inclined portion 31C. Thus, it is possible to more effectively reduce the possibility that the lower inclined portion 31C is damaged or a coating on the lower inclined portion 31C is peeled off due to chippings.
• the straight line 56 (straight lines 56A, 56B, and 56C in FIG. 2) is set to connect the grounding point 52 of the tire 50 to the corner portion 30D at the lower end of the front wall 30A of the reinforcing bead 30 when the vehicle is vacant.
• the bent portion 31A is provided above, in the vehicle height direction, the intersection between the extension line of the straight line 56 and the rear wall 30C. Accordingly, at least when the driver is seated and the vehicle is traveling, the lower inclined portion 31C below the bent portion 31A is positioned below the trajectory of a chipping.
• the upper surface 30B of the reinforcing bead 30 is formed such that the position of the Central portion of the upper surface 30B in the vehicle width direction is higher, with respect to the floor surface 14A, than the positions of both end portions of the upper surface 30B in the vehicle width direction, when seen from the rear of the vehicle (i.e., when seen in the vehicle fore-aft direction).
• the height of the upper surface 30B of the reinforcing bead 30 is largest at the portion near the central portion of the area between the reinforcement 18 and the under-reinforcement 20 in the vehicle width direction (i.e., at the portion near the central portion of the reinforcing bead 30 in the vehicle width direction), that is, the height of the upper surface 30 B is largest at the portion that is most disadvantageous in strength and rigidity. Accordingly, strength and rigidity of the floor panel 14 are improved.
• the reinforcing bead 104 includes a front wall 104A provided at the front side in the vehicle fore-aft direction to form an upward slope toward the rear side in the vehicle fore-aft direction, a top portion 104B provided at an upper end of the front wall 104A, and a rear wall 104C that forms a downward slope from the top portion 104B toward the rear side in the vehicle fore-aft direction.
• the inclination angle of the rear wall 104C with respect to the horizontal plane is smaller than the inclination angle of the front wall 104A with respect to the horizontal plane.
• the bent portion 31 A in the above-described embodiment is not provided at an intermediate portion of the rear wall 104C in the vehicle height direction.
• the inclination angle of the rear wall 104C with respect to the horizontal plane is smaller than the inclination angle of the front wall 104A with respect to the horizontal plane. Accordingly, the collision angle at which chippings collide with the rear wall 104C (the angle at which pebbles or the like directly hit the rear wall 104C) is small compared to a case where the rear wall and the front wall 104A are symmetrically formed in the fore-aft direction. Therefore, it is possible to reduce the possibility that the rear wall 104C is damaged or a coating on the rear wall 104C is peeled off due to chippings.
• the bent portion 31 A of the reinforcing bead 30 is provided above, in the vehicle height direction, the intersection between the rear wall 30C and the extension line of the straight line 56 (straight lines 56A, 56B, and 56C in FIG. 2) connecting the grounding point 52 of the tire 50 to the corner portion 30D of the front wall 30A of the reinforcing bead 30, when seen from the side of the vehicle.
• the bent portion 31 A of the reinforcing bead 30 may be provided at the intersection between the extension line of the straight line 56 (straight lines 56A, 56B, and 56C in FIG. 2) and the rear wall 30C. In this case as well, it is possible to obtain similar effects.
• the upper surface 30B of the reinforcing bead 30 has a substantially arc shape such that the central portion of the upper surface 30B in the vehicle width direction protrudes upward in the vehicle height direction.
• the invention is not limited to this shape, and the reinforcing bead may have any shape as long as the height of the reinforcing bead is largest at the central portion of the reinforcing bead in the vehicle width direction when seen from the rear of the vehicle (i.e., when seen in the vehicle fore-aft direction).

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Body Structure For Vehicles (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (2)

Family

ID=45569690

Family Applications (1)

Country Status (5)

Citations (3)

Family Cites Families (3)

• 2010
  • 2010-10-07 JP JP2010227574A patent/JP2012081800A/ja active Pending
• 2011
  • 2011-10-04 CN CN2011800479896A patent/CN103153762A/zh active Pending
  • 2011-10-04 RU RU2013115392/11A patent/RU2013115392A/ru not_active Application Discontinuation
  • 2011-10-04 BR BR112013008161A patent/BR112013008161A2/pt not_active IP Right Cessation
  • 2011-10-04 WO PCT/IB2011/002320 patent/WO2012046120A2/en active Application Filing

Patent Citations (3)

Also Published As

Similar Documents

Legal Events