WO2023189862A1 - Rear bumper structure - Google Patents
Rear bumper structure Download PDFInfo
- Publication number
- WO2023189862A1 WO2023189862A1 PCT/JP2023/011031 JP2023011031W WO2023189862A1 WO 2023189862 A1 WO2023189862 A1 WO 2023189862A1 JP 2023011031 W JP2023011031 W JP 2023011031W WO 2023189862 A1 WO2023189862 A1 WO 2023189862A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plate portion
- plate
- width direction
- vehicle width
- rear bumper
- Prior art date
Links
- 230000002787 reinforcement Effects 0.000 claims abstract description 28
- 210000003195 fascia Anatomy 0.000 claims description 43
- 230000001174 ascending effect Effects 0.000 claims description 24
- 238000003466 welding Methods 0.000 description 12
- 239000002184 metal Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
Definitions
- the present invention relates to a rear bumper structure provided on a vehicle.
- a rear bumper structure in general, includes a rear bumper fascia located at the rear end of a vehicle, and a bumper reinforcement located inside the rear bumper fascia.
- the bumper reinforcement is connected to the side member of the vehicle body.
- a bumper reinforcement is configured by combining a frame member that is elongated in the vehicle width direction and a plurality of members.
- the bumper reinforcement is achieved by a groove-shaped frame member extending in the vehicle width direction and opening toward the front, an arm fixed to the front end of this frame member, etc. It is configured.
- a first step section has been installed at the center of the rear bumper fascia in the vehicle width direction, and a second step section that is higher on both sides of the rear bumper fascia in the vehicle width direction has been installed.
- a second step section is provided, and the step section is structured so that it can be stepped on by a person's legs.
- the problem to be solved by this invention is to ensure the rigidity of the bumper reinforcement that supports the first step part of the first stage and the second step part of the second stage provided on the rear bumper fascia.
- the aim is to achieve both weight reduction.
- the present invention includes a first step portion formed at the center in the vehicle width direction, and a first step portion formed at a position closer to one side in the vehicle width direction with respect to the first step portion.
- a rear bumper fascia having a second step portion formed higher than the rear bumper fascia; and a bumper rinsing force disposed inside the rear bumper fascia, the bumper rinsing force being located below the second step portion. and a lower part of the first step part, a front plate part extending upward from the front side of the bottom plate part, and a rear plate part extending upward from the rear side of the bottom plate part.
- the rear bumper structure includes a support member that supports the second step part and has a leg plate part fixed to the rear bumper structure.
- the support member is located on the one side of the first leg plate portion that supports the end of the second step portion on the first step portion side, and the first leg plate portion, and It is preferable that the second leg plate part supports the second step part from below.
- the first and second leg plate portions each have a lower end plate portion extending in the vehicle width direction and an ascending plate portion bent upward from the lower end plate portion, the front plate portion and the rear plate portion. a first upper end welded to the first leg plate, and a second upper end welded to the second leg plate at a position closer to one side with respect to the first upper end. and at least one upper end of the first and second upper end parts is formed in a notch shape that contacts the lower end plate part and the ascending plate part of the corresponding leg plate part. It is more preferable.
- the bumper reinforcement further includes a side bracket connected to one end of the frame member in the vehicle width direction, and a connection portion of the frame member to the side bracket is present only at the bottom plate portion. It is preferable.
- the frame member has a fastening seat surface at a lower end of a bulge that partially pushes out the bottom plate part downward, and the rear bumper fascia has a lower end wall part fastened to the fastening seat surface. It is preferable.
- the rear bumper fascia has the second step portions on both sides of the first step portion in the vehicle width direction, and the bumper reinforcement has the second step portions on both sides of the center bracket in the vehicle width direction. It is preferable that each of them has the support member.
- this invention aims to both ensure the rigidity and reduce the weight of the bumper reinforcement that supports the first step part of the first stage and the second step part of the second stage provided on the rear bumper fascia. I can do it.
- a perspective view showing a rear bumper structure according to an embodiment of the invention A perspective view showing the appearance of the rear bumper structure shown in Figure 1.
- a perspective view of a frame member according to an embodiment A plan view of the frame member in FIG. 3
- Side view of the frame member in Figure 3 A perspective view showing the vicinity of the lower end wall of the rear bumper fascia in Figure 2.
- Enlarged view of the vicinity of the bracket on one side of Figure 1 Cross-sectional view taken along line AA in Figure 7
- Cross-sectional view taken along line E-E in Figure 7 Perspective view of the vicinity of the side bracket in Figure 1
- the rear bumper structure includes a rear bumper fascia 10 disposed at the rear end of the vehicle 1, a bumper reinforcement 20 disposed inside the rear bumper fascia 10, and , is provided.
- the concepts of longitudinal direction, vehicle width direction, and vertical direction mean the longitudinal direction, vehicle width direction, and vertical direction of the vehicle 1.
- the illustrated vehicle 1 has rear doors 2 and 3 at the center in the vehicle width direction, and tail lamps 4 and 5 on both sides of the rear doors 2 and 3 in the vehicle width direction.
- each of the rear bumper fascia 10 and the bumper reinforcement 20 is plane symmetrical with respect to an imaginary plane along the front-rear direction and the up-down direction that passes through the center of the overall length in the vehicle width direction.
- the rear bumper fascia 10 has a shape that opens toward the front and covers the bumper reinforcement 20 from behind, from above, and from both sides in the vehicle width direction.
- the entire rear bumper fascia 10 is made of a resin part integrally formed of synthetic resin. It is also possible to change the rear bumper fascia to one made of thin metal plate.
- the rear bumper fascia 10 includes a first step portion 11 formed at the center of the rear bumper fascia 10 in the vehicle width direction, and one side (hereinafter referred to as this one side) in the vehicle width direction with respect to the first step portion 11. (simply referred to as "one side.”
- Anti-slips 16, 17, and 18 are fixed to the upper surfaces of the first step portion 11 and the second step portions 12, 14, respectively.
- the bumper reinforcement 20 shown in FIG. a central bracket 22 fixed to one side of the frame member 21, one side support member 23 fixed to one side of the frame member 21, another side support member 24 fixed to the other side of the frame member 21; A first side bracket 25 connected to one end in the vehicle width direction, a second side bracket 26 fixed to the other end of the frame member 21 in the vehicle width direction, and a mounting bracket connected to the center bracket 22. 27. Note that in each of the brackets 22 to 27, illustrations of holes, unevenness, etc. used for connection with other members or attachment of other members are omitted as appropriate.
- the frame member 21 includes a bottom plate part 21a, a front plate part 21b extending upward from the front side of the bottom plate part 21a, and a rear plate part 21c extending upward from the rear side of the bottom plate part 21a. It has and integrally.
- the bottom plate portion 21a, the front plate portion 21b, and the rear plate portion 21c form an open cross section that is open upward over the entire length of the bottom plate portion 21a in the vehicle width direction.
- the frame member 21 is made of one metal plate.
- the overall shape of the frame member 21 is press molded.
- the bottom plate portion 21a has a bulging portion 21d that is partially pushed out downward in the vehicle width direction. Since the frame member 21 is press-molded into a shape having an open cross section that opens above the bottom plate portion 21a, it is possible to punch out the bulging portion 21d during the above-described press-forming.
- a through hole 21e is formed in the bulged portion 21d.
- a flat fastening seat surface 21f is formed around the through hole 21e at the lower end of the bulging portion 21d.
- the bulging portions 21d are formed at multiple locations in the vehicle width direction of the bottom plate portion 21a.
- the rear bumper fascia 10 has a lower end wall portion 19 that overlaps the fastening seat surface 21f.
- the lower end wall portion 19 is composed of a protruding piece portion that partially extends the front lower end edge of the rear bumper fascia 10 toward the front side.
- a through hole 19a is formed in the lower end wall portion 19.
- a clip (not shown) for fixing the lower end wall 19 to the bulge 21d is inserted into the through hole 19a of the lower end wall 19 and the through hole 21e of the bulge 21d. By this fixation, the lower end wall portion 19 is fastened to the fastening seat surface 21f.
- the portion of the lower surface of the frame member 21 other than the fastening seat surface 21f is in a position not in contact with the rear bumper fascia 10, but the fastening seat surface 21f is formed at the lower end of the bulge 21 pushed out downward.
- the height difference between the fastening seat surface 21f and the lower end wall portion 19 is eliminated. Therefore, no gap is created between the lower end wall portion 19 and the fastening seat surface 21f during fastening, and the lower end wall portion 19 is not bent significantly. For this reason, the vicinity of the lower end wall portion 19 becomes difficult to bend when an external force is applied, and the rigidity of the lower portion of the rear bumper fascia 10 against external forces is improved.
- the central bracket 22 is arranged below the first step part 11.
- the entire center bracket 22 is made of a single metal plate.
- the front side of the central bracket 22 and the mounting bracket 27 are welded.
- the mounting bracket 27 is provided for mounting a license plate, and for securing and fixing the surface rigidity of the rear bumper fascia 10 in this vicinity.
- the central bracket 22 is welded to the front plate part 21b and the rear plate part 21c.
- the front plate part 21b and the rear plate part 21c have flat upper end central parts 21g and 21h along the vehicle width direction and the front-rear direction (see FIGS. 3 to 5), and these upper end central parts 21g and 21h.
- a central bracket 22 is welded.
- FIGS. 7 to 10 the positions of the welded portions W1 to W4 are shown in black.
- the welding portions W2 to W4 between the central bracket 22 and the rear plate portion 21c are disposed intermittently so that their positions in the vehicle width direction are different from each other.
- the central bracket 22 is also fixed to the lower end of the first step portion 11 shown in FIG.
- this load is referred to as a "treading load”
- the central bracket 22 can support the first step section 11 from below.
- this This behavior is referred to as "mouth opening"
- the opening is prevented by the resistance of the central bracket 22 fixed to the front plate part 21b and the rear plate part 21c.
- the support member 23 on one side includes a first leg plate part 23a and a second leg plate part 23b fixed to the front plate part 21b and the rear plate part 21c, and an upper part of the first leg plate part 23a and a second leg plate part. It has a top plate part 23c spanning over the top plate part 23b, and an extension plate part 23d fixed to one side of the top plate part 23c. These first leg plate portions 23a to extension plate portions 23d are all made of a single metal plate.
- the first and second leg plate portions 23a, 23b each have lower end plate portions 23e, 23f extending in the vehicle width direction and bent upward from the lower end plate portions 23e, 23f. It has ascending plate parts 23g and 23h.
- the lower end plate part 23e of the first leg plate part 23a and the lower end plate part 23f of the second leg plate part 23b (hereinafter, these are respectively referred to as “first lower end plate part 23e” and “second lower end plate part 23f"). ) each have a shape along the vehicle width direction.
- first ascending plate part 23g of the first leg plate part 23a and the ascending plate part 23h of the second leg plate part 23b (hereinafter, these are referred to as “first ascending plate part 23g” and “second ascending plate part 23h”, respectively).
- first ascending plate part 23g and “second ascending plate part 23h”, respectively.
- second ascending plate part 23h is bent into a circular arc shape at a corner portion continuous with the corresponding first lower end plate portion 23e or second lower end plate portion 23f, respectively.
- the first lower end plate portion 23e and the first ascending plate portion 23g are welded to the front plate portion 21b and the rear plate portion 21c at positions closer to one side with respect to the center bracket 22.
- FIGS. 7 and 11 the positions of the welded portions W5 and W6 are shown in black.
- the first lower end plate portion 23e is welded to a first upper end portion 21i formed on one side of the front plate portion 21b and a first upper end portion 21j formed on one side of the rear plate portion 21c.
- the closed cross section formed by the first lower end plate portion 23e and the frame member 21 has a substantially rectangular cylindrical shape.
- the first upper end 21i of the front plate portion 21b and the first upper end 21j of the rear plate portion 21c are lower than the upper center portions 21g and 21h, respectively.
- the first upper end portion 21i of the front plate portion 21b is formed in a notch shape that contacts along an arc shape on the front side of the first lower end plate portion 23e and the front side of the ascending plate portion 23g.
- the first upper end portion 21j of the rear plate portion 21c is formed in a notch shape that contacts along an arc shape on the rear side of the first lower end plate portion 23e and the rear side of the ascending plate portion 23g.
- the second lower end plate portion 23f is welded to the front plate portion 21b and the rear plate portion 21c at a position closer to one side with respect to the first leg plate portion 23a.
- FIGS. 7 and 12 the positions of the welded portions W7 and W8 are shown in black.
- the second lower end plate 23f is welded to a second upper end 21k formed on one side of the front plate 21b and a second upper end 21l formed on one side of the rear plate 21c. ing.
- the second upper end 21k of the front plate portion 21b and the second upper end 21l of the rear plate portion 21c are formed in a flat shape along the vehicle width direction and the longitudinal direction, respectively.
- the closed cross section formed by the second lower end plate portion 23f and the frame member 21 has a generally rectangular cylindrical shape.
- the top plate portion 23c is arranged below the second step portion 12 on one side. As shown in FIGS. 1 and 13, the top plate part 23c overlaps the upper part of the first ascending plate part 23g and the upper part of the second ascending plate part 23h, and is welded to these upper parts. In FIG. 13, the positions of welds W9 to W10 on the rear side of the top plate portion 23c with respect to the first ascending plate portion 23g and the second ascending plate portion 23h are shown in black. There is a welded portion in a similar arrangement on the front side of the top plate portion 23c. The top plate portion 23c is also fixed to the lower end of the second step portion 12 on one side shown in FIG.
- the support member 23 on one side can support the second step portion 12 on one side from below.
- the first leg plate part 23a supports the end of the second step part 12 on one side on the other side (that is, the first step part 11 side)
- the second leg plate part 23b supports the end of the second step part 12 on one side.
- the step portion 12 is supported from below. Even if the pedal load acts on the front plate part 21b and the rear plate part 21c via the support member 23 on one side, the first and second leg plate parts 23a fixed to the front plate part 21b and the rear plate part 21c , 23b prevents the mouth from opening.
- the rear end of the bumper arm 28 is disposed between the upper part of the second leg plate 23b and one end of the frame member 21.
- the rear end portion of the bumper arm 28 is fixed to the second ascending plate portion 23h.
- the bumper arm 28 is for connecting a side member (not shown) of the vehicle body and the bumper reinforcement 20.
- the extension plate portion 23d is arranged below the third step portion 13 on one side shown in FIG. As shown in FIGS. 1 and 13, the extension plate portion 23d has a shape that opens downward over the entire length of the extension plate portion 23d in the vehicle width direction. The other side of the extension plate part 23d sandwiches one side of the top plate part 23c in the front-rear direction, and is welded to the top plate part 23c at this sandwiching part. One side of the extension plate portion 23d is welded to the first side bracket 25. In FIG. 13, the positions of welded parts W11 to W13 of the top plate 23c with respect to the top plate 23c and the first side bracket 25 are shown in black. When a pedal load is applied to the third step portion 13 on one side, the extension plate portion 23d can support the third step portion 13 on one side from below.
- the first side bracket 25 is connected to the frame member 21 by welding to the frame member 21.
- the first side bracket 25 supports the extension plate 23d to the frame member 21, fixes the rear bumper fascia 10, attaches a side radar (not shown) for collision avoidance at the rear of the vehicle, and supports the rear bumper fascia 10 made of resin. This is provided to ensure the rigidity of one side surface.
- the side brackets can be omitted.
- the connecting portion of the frame member 21 to the first side bracket 25 is a welded portion W14 whose position is shown in black in FIG. 13.
- the welded portion W14 exists only on the lower surface of the bottom plate portion 21a.
- the entire portion of the frame member 21 on one side of the second lower end plate portion 23f remains in an open cross section that opens upward.
- the reason why the connection portion between the first side bracket 25 and the frame member 21 is limited to the lower surface of the bottom plate portion 21a is to suppress vibration of the first side bracket 25 in the vehicle width direction.
- the support member 24 on the other side shown in FIG. 1 has a structure that has the above-mentioned plane symmetry with respect to the support member 23 on the one side, so only an outline will be described.
- the support member 24 on the other side has first and second leg plate parts 24a and 24b fixed to the front plate part 21b and the rear plate part 21c at a position closer to the other side with respect to the center bracket 22, and The second step part 14 on the side can be supported.
- These first and second leg plate portions 24a, 24b include lower end plate portions 24c, 24d extending in the vehicle width direction, and ascending plate portions 24e, 24f bent upward from the lower end plate portions 24c, 24d.
- the front plate part 21b and the rear plate part 21c have first upper end parts 21m and 21n welded to the first leg plate part 24a, and a position closer to the other side with respect to the first upper end parts 21m and 21n, respectively. It has second upper end portions 21o and 21p welded to the second leg plate portion 24b.
- the first upper end portion 21m formed on the other side of the front plate portion 21b and the first upper end portion 21n formed on the other side of the rear plate portion 21c are the lower end plate portion 24c of the first leg plate portion 24a, respectively. and is formed in a notch shape in contact with the ascending plate portion 24e (see FIG. 3).
- the support member 24 on the other side can support the second step portion 14 on the other side from below.
- the first leg plate part 24a on the other side supports the end part on one side (that is, the first step part 11 side) of the second step part 14 on the other side
- the second leg plate part 23b supports the end part on the other side. This will support the second step part 14 from below.
- the first and second leg plate parts 24a fixed to the front plate part 21b and the rear plate part 21c , 24b prevents the mouth from opening.
- the second side bracket 26 shown in FIG. 1 has a structure that has the above-mentioned plane symmetry with respect to the first side bracket 25, so a description thereof will be omitted.
- this rear bumper structure includes a first step portion 11 formed at the center portion in the vehicle width direction, and a portion located on one side (one side or the other side) in the vehicle width direction with respect to the first step portion 11.
- the present invention includes a rear bumper fascia 10 having second step parts 12 and 14 formed higher than the first step part 11 at a position where the rear bumper fascia 10 is located higher than the first step part 11, and a bumper reinforcement 20 disposed inside the rear bumper fascia 10. .
- the bumper rinse force 20 extends between a bottom plate part 21a between the lower part of the second step parts 12, 14 and the lower part of the first step part 11, and a front plate part 21b extending upward from the front side of the bottom plate part 21a.
- a frame that integrally includes a rear plate part 21c extending upward from the rear side of the bottom plate part 21a, and has an open cross section that is open upward over the entire length in the vehicle width direction between the front plate part 21b and the rear plate part 21c.
- a member 21 is provided. This reduces the weight of the frame member 21 over the entire length compared to a frame with a closed cross section, and since the pedal load acts on the upwardly facing front plate portion 21b and rear plate portion 21c, the frame member 21 can be opened.
- the front plate part 21b and the rear plate part 21c are less likely to bend due to the pedal load than when the mouth is oriented in the front-rear direction, which is effective in improving the rigidity of the bumper reinforcement 20 against the pedal load. Furthermore, the bumper rinse force 20 is fixed to the front plate part 21b and the rear plate part 21c so as to cover the open section below the first step part 11, and supports the first step part 11, and the central bracket First and second leg plate parts 23a, 23b fixed to the front plate part 21b and the rear plate part 21c so as to cover the open cross section at a position closer to the one side (one side or the other side) with respect to 22, Support members 23 and 24 having 24a and 24b and supporting the second step parts 12 and 14 are provided.
- the frame member 21 with an open cross section is stepped on using the central bracket 22 and the supporting members 23 and 24, which have rigidity to support the first step part 11 and the second step parts 12 and 14 on which the stepping load acts.
- the cross-section is closed at key points where loads are applied, and it is possible to prevent the frame member 21 from opening over a wide range in the vehicle width direction.
- this rear bumper structure secures the rigidity and reduces the weight of the bumper reinforcement 20 that supports the first step part 11 of the first stage and the second step parts 12 and 14 of the second stage provided on the rear bumper fascia 10. It is possible to achieve both.
- the supporting members 23 and 24 support the first leg plate parts 23a and 24a that support the ends of the second step parts 12 and 14 on the first step part 11 side, and the one side of the first leg plate parts 23a and 24a.
- Second leg plate parts 23b and 24b are located on one side or the other side and support the second step parts 12 and 14 from below.
- the second step portions 12 and 14 can be widely supported in the vehicle width direction
- the first and second leg plate portions 23a, 24a, 23b, and 24b are used to support the second step portions 12 and 14 on one side of the frame member 21. (one side or the other side) can be reinforced widely in the vehicle width direction to prevent the frame member 21 from opening on one side (one side or the other side).
- first and second leg plate portions 23a, 23b, 24a, and 24b are connected to lower end plate portions 23e, 23f, 24c, and 24d extending in the vehicle width direction, and upper side from the lower end plate portions 23e, 23f, 24c, and 24d, respectively.
- Ascending plate portions 23g, 23h, 24e, 24f are bent, and the front plate portion 21b and the rear plate portion 21c are respectively welded to the first leg plate portion 23a.
- 21m, 21n, and second upper end portions 21k, 21l, 21o, 21p welded to the second leg plate portion 23b at positions closer to one side than the first upper end portions 21i, 21j.
- At least one upper end portion 21i, 21j, 21m, 21n is connected to the lower end plate portions 23e, 24c of the corresponding leg plate portions 23a, 24a and the ascending plate portion. It is formed in the shape of a notch in contact with 23g and 24e. Thereby, the length of these welds can be increased.
- the welding length of the leg plate parts 23a, 24a, the front plate part 21b, and the rear plate part 21c is lengthened by the above-mentioned notch shape, and it is easy to ensure the rigidity of the bumper reinforcement 20 against the pedal load. be able to.
- this embodiment is an example in which sufficient rigidity can be secured simply by increasing the welding length for the first leg plates 23a and 24a, so the welding length for the second leg plates 23b and 24b is increased.
- the welding length is not made longer, in order to further improve the rigidity, the welding length of the second leg plate portions 23b and 24b may also be made longer.
- the bumper reinforcement 20 further includes side brackets 25 and 26 connected to one end of the frame member 21 in the vehicle width direction, and a welded portion W14 as a connection portion of the frame member 21 to the side brackets 25 and 26 is provided. It exists only in the bottom plate portion 21a. Thereby, vibration of the side brackets 25 and 26 in the vehicle width direction can be suppressed.
- the frame member 21 has a fastening seat surface 21f at the lower end of the bulging portion 21d that partially pushes out the bottom plate portion 21a downward
- the rear bumper fascia 10 has a lower end wall portion fastened to the fastening seat surface 21f. It has 19. This suppresses the height difference between the fastening seat surface 21f and the lower end wall 19 from the bottom plate part 21a side, prevents a gap from forming between the lower end wall 19 and the fastening seat surface 21f during fastening, and furthermore, the lower end wall By making the vicinity of the portion 19 less likely to bend when an external force is applied, the rigidity of the lower part of the rear bumper fascia 10 against external forces can be improved.
- the rear bumper fascia 10 has second step parts 12 and 14 on both sides (one side and the other side) in the vehicle width direction with respect to the first step part 11, and the bumper reinforcement 20 has second step parts 12 and 14 on both sides (one side and the other side) of the first step part 11, Support members 23 and 24 are respectively provided on both sides (one side and the other side) in the vehicle width direction.
- the structure of the rear bumper fascia 10 and the bumper reinforcement 20 can be provided in a well-balanced manner on both sides in the vehicle width direction, while securing the rigidity and reducing the weight of the bumper reinforcement 20 that supports both second step parts 12 and 14. can.
- each support member 23, 24 is connected to a frame member by a plurality of brackets including a bracket provided with first leg plate portions 23a, 24a and a bracket provided with second leg plate portions 23b, 24b.
- the structure of the supporting member is not particularly limited in the present invention, it is only necessary to use a member disposed on the frame member as a component of the supporting member to make the frame member have a closed cross section.
- the second leg plate may be omitted, or another leg plate different from the first and second leg plates may be added to create a closed cross-section of the frame member.
- bracket that integrally includes a first leg plate portion and a second leg plate portion.
- second step portions 12 and 14 were provided on both sides of the vehicle 1 in the vehicle width direction, and supporting members 23 and 24 were provided correspondingly, but the second step portions, A mode in which the support member is provided only on one side of the vehicle in the vehicle width direction is also included within the scope of the present invention.
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Abstract
A bumper reinforcement (20) comprises a frame member (21) having an open cross section that opens upward over the entire length, a center bracket (22) that is fixed to a front plate (21b) and a rear plate (21c) of the frame member (21) below a first step (11) and that supports the first step (11), and a support member (23) that supports a second step (12) and has leg plates (23a, 23b) fixed to the front plate (21b) and the rear plate (21c) at positions near one side of the vehicle width direction with respect to the center bracket (22).
Description
この発明は、車両に設けられたリヤバンパー構造に関する。
The present invention relates to a rear bumper structure provided on a vehicle.
一般に、リヤバンパー構造は、車両後端部に配置されたリヤバンパーフェイシャと、リヤバンパーフェイシャの内側に配置されたバンパーリンフォースと、を備える。バンパーリンフォースは、車体のサイドメンバーに結合されている。従来、バンパーリンフォースは、車幅方向に長尺なフレーム部材と、複数の部材と、を組み合わせて構成されている。
In general, a rear bumper structure includes a rear bumper fascia located at the rear end of a vehicle, and a bumper reinforcement located inside the rear bumper fascia. The bumper reinforcement is connected to the side member of the vehicle body. Conventionally, a bumper reinforcement is configured by combining a frame member that is elongated in the vehicle width direction and a plurality of members.
例えば、特許文献1に開示されたリヤバンパー構造においては、車幅方向に延びて前方側に開放した溝状のフレーム部材や、このフレーム部材の前端部に固定されたアーム等でバンパーリンフォースが構成されている。
For example, in the rear bumper structure disclosed in Patent Document 1, the bumper reinforcement is achieved by a groove-shaped frame member extending in the vehicle width direction and opening toward the front, an arm fixed to the front end of this frame member, etc. It is configured.
近年では、車両後部への昇降の利便性を高めるため、リヤバンパーフェイシャの車幅方向中央部に一段目となる第一ステップ部を設け、リヤバンパーフェイシャの車幅方向両側により高い二段目となる第二ステップ部を設け、これらステップ部を人脚で踏める構造にすることがある。この種のリヤバンパーフェイシャを採用する場合、踏荷重が作用する第一、第二ステップ部を支えることが好ましいが、特許文献1のリヤバンパー構造では、リヤバンパーフェイシャを支えることが考慮されていない。前向きに開いた溝状のフレーム部材の上板部に踏荷重が作用すると、上板部が撓み易く、剛性が不足する懸念がある。フレーム部材を車幅方向の全長に亘って閉断面化すれば、剛性を確保することは可能だが、
重量が嵩むことになる。 In recent years, in order to increase the convenience of going up and down to the rear of the vehicle, a first step section has been installed at the center of the rear bumper fascia in the vehicle width direction, and a second step section that is higher on both sides of the rear bumper fascia in the vehicle width direction has been installed. In some cases, a second step section is provided, and the step section is structured so that it can be stepped on by a person's legs. When adopting this type of rear bumper fascia, it is preferable to support the first and second step portions on which the pedal load acts, but in the rear bumper structure ofPatent Document 1, supporting the rear bumper fascia is not considered. . When a pedal load acts on the upper plate portion of the frame member in the shape of a groove that opens forward, the upper plate portion tends to bend and there is a concern that the rigidity may be insufficient. It is possible to ensure rigidity by making the frame member a closed cross section over the entire length of the vehicle width direction, but
This will increase the weight.
重量が嵩むことになる。 In recent years, in order to increase the convenience of going up and down to the rear of the vehicle, a first step section has been installed at the center of the rear bumper fascia in the vehicle width direction, and a second step section that is higher on both sides of the rear bumper fascia in the vehicle width direction has been installed. In some cases, a second step section is provided, and the step section is structured so that it can be stepped on by a person's legs. When adopting this type of rear bumper fascia, it is preferable to support the first and second step portions on which the pedal load acts, but in the rear bumper structure of
This will increase the weight.
上述の背景に鑑み、この発明が解決しようとする課題は、リヤバンパーフェイシャに設けた一段目の第一ステップ部と、二段目の第二ステップ部と、を支えるバンパーリンフォースの剛性確保と軽量化の両立を図ることにある。
In view of the above background, the problem to be solved by this invention is to ensure the rigidity of the bumper reinforcement that supports the first step part of the first stage and the second step part of the second stage provided on the rear bumper fascia. The aim is to achieve both weight reduction.
上記の課題を解決するため、この発明は、車幅方向の中央部に形成された第一ステップ部と、前記第一ステップ部に対して車幅方向の片側に寄った位置で前記第一ステップ部よりも高く形成された第二ステップ部とを有するリヤバンパーフェイシャと、 前記リヤバンパーフェイシャの内側に配置されたバンパーリンフォースと、を備え、 前記バンパーリンフォースが、前記第二ステップ部の下方と前記第一ステップ部の下方との間に亘る底板部と、前記底板部の前方側から上方に延びる前板部と、前記底板部の後方側から上方に延びる後板部とを一体に有しかつ前記前板部と前記後板部間を車幅方向の全長に亘って上方に開いた開断面を有するフレーム部材と、前記第一ステップ部の下方で前記開断面を覆うように前記前板部及び前記後板部に固定され前記第一ステップ部を支える中央ブラケットと、前記中央ブラケットに対して前記片側に寄った位置で前記開断面を覆うように前記前板部及び前記後板部に固定された脚板部を有して前記第二ステップ部を支える支持部材と、を具備するリヤバンパー構造に構成したものである。
In order to solve the above problems, the present invention includes a first step portion formed at the center in the vehicle width direction, and a first step portion formed at a position closer to one side in the vehicle width direction with respect to the first step portion. a rear bumper fascia having a second step portion formed higher than the rear bumper fascia; and a bumper rinsing force disposed inside the rear bumper fascia, the bumper rinsing force being located below the second step portion. and a lower part of the first step part, a front plate part extending upward from the front side of the bottom plate part, and a rear plate part extending upward from the rear side of the bottom plate part. and a frame member having an open cross section that is open upwardly over the entire length in the vehicle width direction between the front plate part and the rear plate part, and a frame member that covers the open cross section below the first step part. a central bracket that is fixed to the plate part and the rear plate part and supports the first step part; and the front plate part and the rear plate part so as to cover the open section at a position closer to the one side with respect to the central bracket. The rear bumper structure includes a support member that supports the second step part and has a leg plate part fixed to the rear bumper structure.
前記構成においては、前記支持部材が、前記第二ステップ部の前記第一ステップ部側の端部を支える第一の前記脚板部と、前記第一の脚板部よりも前記片側に位置し、前記第二ステップ部を下方から支える第二の前記脚板部と、を含むことが好ましい。
In the configuration, the support member is located on the one side of the first leg plate portion that supports the end of the second step portion on the first step portion side, and the first leg plate portion, and It is preferable that the second leg plate part supports the second step part from below.
前記第一及び第二の脚板部が、それぞれ車幅方向に延びる下端板部と、前記下端板部から上方側に曲げられた上行板部とを有し、前記前板部及び前記後板部が、それぞれ前記第一の脚板部に溶接された第一の上端部と、前記第一の上端部に対して前記片側に寄った位置で前記第二の脚板部に溶接された第二の上端部とを有し、前記第一及び第二の上端部のうち、少なくとも一か所の上端部が、対応の前記脚板部の下端板部及び上行板部に接する切欠き状に形成されていることがより好ましい。
The first and second leg plate portions each have a lower end plate portion extending in the vehicle width direction and an ascending plate portion bent upward from the lower end plate portion, the front plate portion and the rear plate portion. a first upper end welded to the first leg plate, and a second upper end welded to the second leg plate at a position closer to one side with respect to the first upper end. and at least one upper end of the first and second upper end parts is formed in a notch shape that contacts the lower end plate part and the ascending plate part of the corresponding leg plate part. It is more preferable.
また、前記バンパーリンフォースが、前記フレーム部材の車幅方向の一端部に接続されたサイドブラケットをさらに具備し、前記サイドブラケットに対する前記フレーム部材の接続部が、前記底板部のみに存在していることが好ましい。
The bumper reinforcement further includes a side bracket connected to one end of the frame member in the vehicle width direction, and a connection portion of the frame member to the side bracket is present only at the bottom plate portion. It is preferable.
また、前記フレーム部材が、前記底板部を部分的に下方へ押し出した膨出部の下端に締結座面を有し、前記リヤバンパーフェイシャが、前記締結座面に締結された下端壁部を有することが好ましい。
Further, the frame member has a fastening seat surface at a lower end of a bulge that partially pushes out the bottom plate part downward, and the rear bumper fascia has a lower end wall part fastened to the fastening seat surface. It is preferable.
また、前記リヤバンパーフェイシャが、前記第一ステップ部に対して車幅方向の両側にそれぞれ前記第二ステップ部を有し、前記バンパーリンフォースが、前記中央ブラケットに対して車幅方向の両側にそれぞれ前記支持部材を有することが好ましい。
The rear bumper fascia has the second step portions on both sides of the first step portion in the vehicle width direction, and the bumper reinforcement has the second step portions on both sides of the center bracket in the vehicle width direction. It is preferable that each of them has the support member.
この発明は、上記構成の採用により、リヤバンパーフェイシャに設けた一段目の第一ステップ部と、二段目の第二ステップ部とを支えるバンパーリンフォースの剛性確保と軽量化の両立を図ることができる。
By employing the above-mentioned configuration, this invention aims to both ensure the rigidity and reduce the weight of the bumper reinforcement that supports the first step part of the first stage and the second step part of the second stage provided on the rear bumper fascia. I can do it.
この発明の一例としての実施形態に係るリヤバンパー構造を添付図面に基づいて説明する。
A rear bumper structure according to an exemplary embodiment of the present invention will be described based on the accompanying drawings.
実施形態に係るリヤバンパー構造は、図1、図2に示すように、車両1の後端部に配置されたリヤバンパーフェイシャ10と、リヤバンパーフェイシャ10の内側に配置されたバンパーリンフォース20と、を備える。以下、前後方向、車幅方向、上下方向の各方向概念は、車両1の前後方向、車幅方向、上下方向を意味する。
As shown in FIGS. 1 and 2, the rear bumper structure according to the embodiment includes a rear bumper fascia 10 disposed at the rear end of the vehicle 1, a bumper reinforcement 20 disposed inside the rear bumper fascia 10, and , is provided. Hereinafter, the concepts of longitudinal direction, vehicle width direction, and vertical direction mean the longitudinal direction, vehicle width direction, and vertical direction of the vehicle 1.
図示例の車両1は、車幅方向の中央部に後部ドア2,3を有し、後部ドア2,3に対して車幅方向両側にテールランプ4,5を有する。
The illustrated vehicle 1 has rear doors 2 and 3 at the center in the vehicle width direction, and tail lamps 4 and 5 on both sides of the rear doors 2 and 3 in the vehicle width direction.
リヤバンパーフェイシャ10及びバンパーリンフォース20の夫々の全体的な構造は、夫々の車幅方向の全長の中央位置を通る前後方向及び上下方向に沿った仮想平面に関して面対称になっている。
The overall structure of each of the rear bumper fascia 10 and the bumper reinforcement 20 is plane symmetrical with respect to an imaginary plane along the front-rear direction and the up-down direction that passes through the center of the overall length in the vehicle width direction.
リヤバンパーフェイシャ10は、前方側に向かって開放し、バンパーリンフォース20を後方、上方及び車幅方向両側から覆い隠す形状を有する。リヤバンパーフェイシャ10の全体は、合成樹脂によって一体に形成された樹脂部品からなる。なお、リヤバンパーフェイシャを金属薄板製に変更することも可能である。
The rear bumper fascia 10 has a shape that opens toward the front and covers the bumper reinforcement 20 from behind, from above, and from both sides in the vehicle width direction. The entire rear bumper fascia 10 is made of a resin part integrally formed of synthetic resin. It is also possible to change the rear bumper fascia to one made of thin metal plate.
リヤバンパーフェイシャ10は、リヤバンパーフェイシャ10の車幅方向の中央部に形成された第一ステップ部11と、第一ステップ部11に対して車幅方向一方の片側(以下、この片側のことを単に「一方側」という。)に寄った位置で第一ステップ部11よりも高く形成された一方側の第二ステップ部12と、一方側の第二ステップ部12に対して一方側に寄った位置で一方側の第二ステップ部12よりも高く形成された一方側の第三ステップ部13と、第一ステップ部11に対して車幅方向一方とは反対の片側(以下、この片側のことを単に「他方側」という。)に寄った位置で第一ステップ部11よりも高く形成された他方側の第二ステップ部14と、他方側の第二ステップ部14に対して他方側に寄った位置で他方側の第二ステップ部14よりも高く形成された他方側の第三ステップ部15と、を有する。
The rear bumper fascia 10 includes a first step portion 11 formed at the center of the rear bumper fascia 10 in the vehicle width direction, and one side (hereinafter referred to as this one side) in the vehicle width direction with respect to the first step portion 11. (simply referred to as "one side." A third step part 13 on one side that is formed higher than the second step part 12 on one side in position, and one side opposite to the first step part 11 in the vehicle width direction (hereinafter referred to as this one side) (simply referred to as "the other side"). and a third step section 15 on the other side that is formed higher than the second step section 14 on the other side at the position shown in FIG.
第一ステップ部11及び各第二ステップ部12,14の上面には、それぞれ滑り止め16,17,18が固定されている。
Anti-slips 16, 17, and 18 are fixed to the upper surfaces of the first step portion 11 and the second step portions 12, 14, respectively.
図1に示すバンパーリンフォース20は、一方側の第二ステップ部12の下方と他方側の第二ステップ部14の下方との間に亘るフレーム部材21と、フレーム部材21の車幅方向の中央部に固定された中央ブラケット22と、フレーム部材21の一方側に固定された一方側の支持部材23と、フレーム部材21の他方側に固定された他方側の支持部材24と、フレーム部材21の車幅方向の一端部に接続された第一のサイドブラケット25と、フレーム部材21の車幅方向の他端部に固定された第二のサイドブラケット26と、中央ブラケット22に接続された取付ブラケット27と、を具備する。なお、各ブラケット22~27において、他の部材との接続や他の部材の取り付けに用いる孔、凹凸等の図示は適宜省略している。
The bumper reinforcement 20 shown in FIG. a central bracket 22 fixed to one side of the frame member 21, one side support member 23 fixed to one side of the frame member 21, another side support member 24 fixed to the other side of the frame member 21; A first side bracket 25 connected to one end in the vehicle width direction, a second side bracket 26 fixed to the other end of the frame member 21 in the vehicle width direction, and a mounting bracket connected to the center bracket 22. 27. Note that in each of the brackets 22 to 27, illustrations of holes, unevenness, etc. used for connection with other members or attachment of other members are omitted as appropriate.
図3~図5に示すように、フレーム部材21は、底板部21aと、底板部21aの前方側から上方に延びる前板部21bと、底板部21aの後方側から上方に延びる後板部21cと、を一体に有する。底板部21aと前板部21bと後板部21cは、底板部21aの車幅方向の全長に亘って上方に開いた開断面を成している。フレーム部材21は、一枚の金属板からなる。フレーム部材21の全体的な形状は、プレス成形されている。
As shown in FIGS. 3 to 5, the frame member 21 includes a bottom plate part 21a, a front plate part 21b extending upward from the front side of the bottom plate part 21a, and a rear plate part 21c extending upward from the rear side of the bottom plate part 21a. It has and integrally. The bottom plate portion 21a, the front plate portion 21b, and the rear plate portion 21c form an open cross section that is open upward over the entire length of the bottom plate portion 21a in the vehicle width direction. The frame member 21 is made of one metal plate. The overall shape of the frame member 21 is press molded.
底板部21aは、図3~図6に示すように、その車幅方向の一部分を下方へ押し出された膨出部21dを有する。フレーム部材21が底板部21aの上方を開いた開断面を有する形状にプレス成形されるので、膨出部21dを前述のプレス成形に際して打ち出すことが可能である。
As shown in FIGS. 3 to 6, the bottom plate portion 21a has a bulging portion 21d that is partially pushed out downward in the vehicle width direction. Since the frame member 21 is press-molded into a shape having an open cross section that opens above the bottom plate portion 21a, it is possible to punch out the bulging portion 21d during the above-described press-forming.
膨出部21dに貫通孔21eが形成されている。膨出部21dの下端のうち、貫通孔21eの周囲には平坦面状の締結座面21fが形成されている。膨出部21dは、底板部21aの車幅方向の複数箇所に分散して形成されている。
A through hole 21e is formed in the bulged portion 21d. A flat fastening seat surface 21f is formed around the through hole 21e at the lower end of the bulging portion 21d. The bulging portions 21d are formed at multiple locations in the vehicle width direction of the bottom plate portion 21a.
リヤバンパーフェイシャ10は、図6に示すように、締結座面21fに重なる下端壁部19を有する。下端壁部19は、リヤバンパーフェイシャ10の前方側下端縁を部分的に前方側へ延長した突片部からなる。下端壁部19には、貫通孔19aが形成されている。下端壁部19の貫通孔19aと膨出部21dの貫通孔21eには、下端壁部19を膨出部21dに固定するためのクリップ(図示省略)が差し込まれる。この固定により、下端壁部19が締結座面21fに締結される。フレーム部材21の下面のうち、締結座面21f以外の部位は、リヤバンパーフェイシャ10と非接触の位置にあるが、下方へ押し出された膨出部21の下端に締結座面21fが形成されていることにより、締結座面21fと下端壁部19間の高低差が無くされている。このため、締結時に下端壁部19と締結座面21f間に隙間が生じず、下端壁部19を大きく撓ませることもない。このため、下端壁部19付近が外力の作用時に撓みにくくなり、外力に対するリヤバンパーフェイシャ10の下部の剛性が向上させられる。
As shown in FIG. 6, the rear bumper fascia 10 has a lower end wall portion 19 that overlaps the fastening seat surface 21f. The lower end wall portion 19 is composed of a protruding piece portion that partially extends the front lower end edge of the rear bumper fascia 10 toward the front side. A through hole 19a is formed in the lower end wall portion 19. A clip (not shown) for fixing the lower end wall 19 to the bulge 21d is inserted into the through hole 19a of the lower end wall 19 and the through hole 21e of the bulge 21d. By this fixation, the lower end wall portion 19 is fastened to the fastening seat surface 21f. The portion of the lower surface of the frame member 21 other than the fastening seat surface 21f is in a position not in contact with the rear bumper fascia 10, but the fastening seat surface 21f is formed at the lower end of the bulge 21 pushed out downward. As a result, the height difference between the fastening seat surface 21f and the lower end wall portion 19 is eliminated. Therefore, no gap is created between the lower end wall portion 19 and the fastening seat surface 21f during fastening, and the lower end wall portion 19 is not bent significantly. For this reason, the vicinity of the lower end wall portion 19 becomes difficult to bend when an external force is applied, and the rigidity of the lower portion of the rear bumper fascia 10 against external forces is improved.
図1に示すように、中央ブラケット22は、第一ステップ部11の下方に配置されている。中央ブラケット22の全体は、一枚の金属板からなる。
As shown in FIG. 1, the central bracket 22 is arranged below the first step part 11. The entire center bracket 22 is made of a single metal plate.
中央ブラケット22の前方側と取付ブラケット27が溶接されている。取付ブラケット27は、ライセンスプレート(ナンバープレート)の取り付け、並びにこの付近でのリヤバンパーフェイシャ10の面剛性の確保及び固定のために設けられている。
The front side of the central bracket 22 and the mounting bracket 27 are welded. The mounting bracket 27 is provided for mounting a license plate, and for securing and fixing the surface rigidity of the rear bumper fascia 10 in this vicinity.
中央ブラケット22は、前板部21b及び後板部21cと溶接されている。前板部21bと後板部21cは、それぞれ車幅方向及び前後方向に沿った平坦状の上端中央部21g,21hを有し(図3~図5参照)、これら上端中央部21g,21hと中央ブラケット22が溶接されている。図7~図10に、その溶接部W1~W4の位置を黒塗りで示す。中央ブラケット22と前板部21bの溶接部W1に対し、中央ブラケット22と後板部21cの溶接部W2~W4は、互いの車幅方向位置が異なるように断続的に配置されている。
The central bracket 22 is welded to the front plate part 21b and the rear plate part 21c. The front plate part 21b and the rear plate part 21c have flat upper end central parts 21g and 21h along the vehicle width direction and the front-rear direction (see FIGS. 3 to 5), and these upper end central parts 21g and 21h. A central bracket 22 is welded. In FIGS. 7 to 10, the positions of the welded portions W1 to W4 are shown in black. In contrast to the welding portion W1 between the central bracket 22 and the front plate portion 21b, the welding portions W2 to W4 between the central bracket 22 and the rear plate portion 21c are disposed intermittently so that their positions in the vehicle width direction are different from each other.
中央ブラケット22は、図1に示す第一ステップ部11の下端にも固定されている。人の脚から下方向の荷重(以下、この荷重を「踏荷重」という。)が第一ステップ部11に負荷されたとき、中央ブラケット22は、第一ステップ部11を下方から支えることができる。この際、踏荷重が中央ブラケット22を介して前板部21bと後板部21cに作用し、前板部21bと後板部21cが互いに前後方向に離れる方向へ倒れようとしても(以下、この挙動を「口開き」という。)、前板部21bと後板部21cに固定された中央ブラケット22の抵抗により、口開きが防止される。
The central bracket 22 is also fixed to the lower end of the first step portion 11 shown in FIG. When a downward load from a person's legs (hereinafter, this load is referred to as a "treading load") is applied to the first step section 11, the central bracket 22 can support the first step section 11 from below. . At this time, even if the pedal load acts on the front plate part 21b and the rear plate part 21c through the center bracket 22 and the front plate part 21b and the rear plate part 21c try to fall apart from each other in the front-rear direction (hereinafter, this This behavior is referred to as "mouth opening"), and the opening is prevented by the resistance of the central bracket 22 fixed to the front plate part 21b and the rear plate part 21c.
一方側の支持部材23は、前板部21b及び後板部21cに固定された第一の脚板部23a及び第二の脚板部23bと、第一の脚板部23aの上部と第二の脚板部23bの上部に架け渡された天板部23cと、天板部23cの一方側に固定された延長板部23dと、を有する。これら第一の脚板部23a~延長板部23dは、いずれも一枚の金属板からなる。
The support member 23 on one side includes a first leg plate part 23a and a second leg plate part 23b fixed to the front plate part 21b and the rear plate part 21c, and an upper part of the first leg plate part 23a and a second leg plate part. It has a top plate part 23c spanning over the top plate part 23b, and an extension plate part 23d fixed to one side of the top plate part 23c. These first leg plate portions 23a to extension plate portions 23d are all made of a single metal plate.
図1、図7に示すように、第一及び第二の脚板部23a,23bは、それぞれ車幅方向に延びる下端板部23e,23fと、下端板部23e,23fから上方側に曲げられた上行板部23g,23hと、を有する。第一の脚板部23aの下端板部23eと第二の脚板部23bの下端板部23f(以下、これらをそれぞれ「第一の下端板部23e」、「第二の下端板部23f」という。)は、それぞれ車幅方向に沿った形状を有する。第一の脚板部23aの上行板部23gと、第二の脚板部23bの上行板部23h(以下、これらをそれぞれ「第一の上行板部23g」、「第二の上行板部23h」という。)は、それぞれ対応の第一の下端板部23e又は第二の下端板部23fに連続するコーナー部において円孤状に曲げられている。
As shown in FIGS. 1 and 7, the first and second leg plate portions 23a, 23b each have lower end plate portions 23e, 23f extending in the vehicle width direction and bent upward from the lower end plate portions 23e, 23f. It has ascending plate parts 23g and 23h. The lower end plate part 23e of the first leg plate part 23a and the lower end plate part 23f of the second leg plate part 23b (hereinafter, these are respectively referred to as "first lower end plate part 23e" and "second lower end plate part 23f"). ) each have a shape along the vehicle width direction. The ascending plate part 23g of the first leg plate part 23a and the ascending plate part 23h of the second leg plate part 23b (hereinafter, these are referred to as "first ascending plate part 23g" and "second ascending plate part 23h", respectively). ) is bent into a circular arc shape at a corner portion continuous with the corresponding first lower end plate portion 23e or second lower end plate portion 23f, respectively.
第一の下端板部23eと第一の上行板部23gは、中央ブラケット22に対して一方側に寄った位置で前板部21b及び後板部21cに溶接されている。図7、図11に、その溶接部W5,W6の位置を黒塗りで示す。第一の下端板部23eは、前板部21bの一方側に形成された第一の上端部21iと、後板部21cの一方側に形成された第一の上端部21jとに溶接されている。第一の下端板部23eとフレーム部材21が成す閉断面は、図11に示すように、概ね四角筒状になっている。
The first lower end plate portion 23e and the first ascending plate portion 23g are welded to the front plate portion 21b and the rear plate portion 21c at positions closer to one side with respect to the center bracket 22. In FIGS. 7 and 11, the positions of the welded portions W5 and W6 are shown in black. The first lower end plate portion 23e is welded to a first upper end portion 21i formed on one side of the front plate portion 21b and a first upper end portion 21j formed on one side of the rear plate portion 21c. There is. As shown in FIG. 11, the closed cross section formed by the first lower end plate portion 23e and the frame member 21 has a substantially rectangular cylindrical shape.
前板部21bの第一の上端部21iと後板部21cの第一の上端部21jは、図3、図7に示すように、それぞれ上端中央部21g,21hから低くなっている。前板部21bの第一の上端部21iは、第一の下端板部23eの前方側及び上行板部23gの前方側の円弧状に沿って接する切欠き状に形成されている。後板部21cの第一の上端部21jは、第一の下端板部23eの後方側及び上行板部23gの後方側の円弧状に沿って接する切欠き状に形成されている。このような切欠き状の採用により、第一の下端板部23eと第二の下端板部23fの下端だけでなく、第一の上行板部23g、第二の上行板部23hの車幅方向の側端をも前板部21b、後板部21cに溶接することが可能になる。このため、溶接部W5,W6は、図7に示すように、その切欠き状に沿って設けられており、これにより、溶接部W5,W6の溶接長を長くすることができる。
As shown in FIGS. 3 and 7, the first upper end 21i of the front plate portion 21b and the first upper end 21j of the rear plate portion 21c are lower than the upper center portions 21g and 21h, respectively. The first upper end portion 21i of the front plate portion 21b is formed in a notch shape that contacts along an arc shape on the front side of the first lower end plate portion 23e and the front side of the ascending plate portion 23g. The first upper end portion 21j of the rear plate portion 21c is formed in a notch shape that contacts along an arc shape on the rear side of the first lower end plate portion 23e and the rear side of the ascending plate portion 23g. By adopting such a notch shape, not only the lower ends of the first lower end plate part 23e and the second lower end plate part 23f, but also the first ascending plate part 23g and the second ascending plate part 23h in the vehicle width direction It becomes possible to also weld the side ends of the front plate part 21b and the rear plate part 21c. Therefore, as shown in FIG. 7, the welding portions W5 and W6 are provided along the notch shape, thereby making it possible to increase the welding length of the welding portions W5 and W6.
第二の下端板部23fは、第一の脚板部23aに対して一方側に寄った位置で前板部21b及び後板部21cに溶接されている。図7、図12に、その溶接部W7,W8の位置を黒塗りで示す。第二の下端板部23fは、前板部21bの一方側に形成された第二の上端部21kと、後板部21cの一方側に形成された第二の上端部21lと、に溶接されている。前板部21bの第二の上端部21kと後板部21cの第二の上端部21lは、図3、図5に示すように、それぞれ車幅方向及び前後方向に沿った平坦状に形成されている。第二の下端板部23fとフレーム部材21が成す閉断面は、図12に示すように、概ね四角筒状になっている。
The second lower end plate portion 23f is welded to the front plate portion 21b and the rear plate portion 21c at a position closer to one side with respect to the first leg plate portion 23a. In FIGS. 7 and 12, the positions of the welded portions W7 and W8 are shown in black. The second lower end plate 23f is welded to a second upper end 21k formed on one side of the front plate 21b and a second upper end 21l formed on one side of the rear plate 21c. ing. As shown in FIGS. 3 and 5, the second upper end 21k of the front plate portion 21b and the second upper end 21l of the rear plate portion 21c are formed in a flat shape along the vehicle width direction and the longitudinal direction, respectively. ing. As shown in FIG. 12, the closed cross section formed by the second lower end plate portion 23f and the frame member 21 has a generally rectangular cylindrical shape.
図1に示すように、天板部23cは、一方側の第二ステップ部12の下方に配置されている。天板部23cは、図1、図13に示すように、第一の上行板部23gの上部と第二の上行板部23hの上部に重なっており、これら上部に溶接されている。図13に、第一の上行板部23g、第二の上行板部23hに対する天板部23cの後方側の溶接部W9~W10の位置を黒塗りで示す。天板部23cの前方側にも同様の配置で溶接部が存在している。天板部23cは、図1に示す一方側の第二ステップ部12の下端にも固定されている。
As shown in FIG. 1, the top plate portion 23c is arranged below the second step portion 12 on one side. As shown in FIGS. 1 and 13, the top plate part 23c overlaps the upper part of the first ascending plate part 23g and the upper part of the second ascending plate part 23h, and is welded to these upper parts. In FIG. 13, the positions of welds W9 to W10 on the rear side of the top plate portion 23c with respect to the first ascending plate portion 23g and the second ascending plate portion 23h are shown in black. There is a welded portion in a similar arrangement on the front side of the top plate portion 23c. The top plate portion 23c is also fixed to the lower end of the second step portion 12 on one side shown in FIG.
踏荷重が一方側の第二ステップ部12に負荷されたとき、一方側の支持部材23は、一方側の第二ステップ部12を下方から支えることができる。この際、第一の脚板部23aは、一方側の第二ステップ部12の他方側(すなわち第一ステップ部11側)の端部を支え、第二の脚板部23bは、一方側の第二ステップ部12を下方から支えることになる。その踏荷重が一方側の支持部材23を介して前板部21bと後板部21cに作用しても、前板部21bと後板部21cに固定された第一及び第二の脚板部23a,23bの抵抗により、口開きが防止される。
When a pedal load is applied to the second step portion 12 on one side, the support member 23 on one side can support the second step portion 12 on one side from below. At this time, the first leg plate part 23a supports the end of the second step part 12 on one side on the other side (that is, the first step part 11 side), and the second leg plate part 23b supports the end of the second step part 12 on one side. The step portion 12 is supported from below. Even if the pedal load acts on the front plate part 21b and the rear plate part 21c via the support member 23 on one side, the first and second leg plate parts 23a fixed to the front plate part 21b and the rear plate part 21c , 23b prevents the mouth from opening.
図13に示すように、第二の脚板部23bの上部と、フレーム部材21の一方側の端部と、の間にバンパアーム28の後端部が配置されている。バンパアーム28の後端部は、第二の上行板部23hに固定されている。バンパアーム28は、車体のサイドメンバー(図示省略)とバンパーリンフォース20とを接続するためのものである。
As shown in FIG. 13, the rear end of the bumper arm 28 is disposed between the upper part of the second leg plate 23b and one end of the frame member 21. The rear end portion of the bumper arm 28 is fixed to the second ascending plate portion 23h. The bumper arm 28 is for connecting a side member (not shown) of the vehicle body and the bumper reinforcement 20.
延長板部23dは、図1に示す一方側の第三ステップ部13の下方に配置されている。延長板部23dは、図1、図13に示すように、延長板部23dの車幅方向の全長に亘って下方に開いた形状を有する。延長板部23dの他方側は、天板部23cの一方側を前後方向に挟み、この挟持部において天板部23cに溶接されている。延長板部23dの一方側は、第一のサイドブラケット25に溶接されている。図13に、天板部23c、第一のサイドブラケット25に対する天板部23cの溶接部W11~W13の位置を黒塗りで示す。踏荷重が一方側の第三ステップ部13に負荷されたとき、延長板部23dは、一方側の第三ステップ部13を下方から支えることができる。
The extension plate portion 23d is arranged below the third step portion 13 on one side shown in FIG. As shown in FIGS. 1 and 13, the extension plate portion 23d has a shape that opens downward over the entire length of the extension plate portion 23d in the vehicle width direction. The other side of the extension plate part 23d sandwiches one side of the top plate part 23c in the front-rear direction, and is welded to the top plate part 23c at this sandwiching part. One side of the extension plate portion 23d is welded to the first side bracket 25. In FIG. 13, the positions of welded parts W11 to W13 of the top plate 23c with respect to the top plate 23c and the first side bracket 25 are shown in black. When a pedal load is applied to the third step portion 13 on one side, the extension plate portion 23d can support the third step portion 13 on one side from below.
第一のサイドブラケット25は、フレーム部材21との溶接によってフレーム部材21に接続されている。第一のサイドブラケット25は、フレーム部材21に対する延長板部23dの支持、リヤバンパーフェイシャ10の固定、車両後部の衝突回避用のサイドレーダー(図示省略)の取り付け、及び樹脂製のリヤバンパーフェイシャ10における一方側のサイド面の剛性確保のために設けられている。リヤバンパーフェイシャ10を板金製にする場合はサイドブラケットを省略することが可能である。
The first side bracket 25 is connected to the frame member 21 by welding to the frame member 21. The first side bracket 25 supports the extension plate 23d to the frame member 21, fixes the rear bumper fascia 10, attaches a side radar (not shown) for collision avoidance at the rear of the vehicle, and supports the rear bumper fascia 10 made of resin. This is provided to ensure the rigidity of one side surface. When the rear bumper fascia 10 is made of sheet metal, the side brackets can be omitted.
第一のサイドブラケット25に対するフレーム部材21の接続部は、図13に黒塗りで位置を示す溶接部W14である。溶接部W14は、底板部21aの下面のみに存在している。フレーム部材21のうち、第二の下端板部23fよりも一方側の全部位は、上方に開いた開断面のままである。ここで、第一のサイドブラケット25とフレーム部材21の接続部を底板部21aの下面のみに限定したのは、第一のサイドブラケット25の車幅方向の振動を抑えるためである。
The connecting portion of the frame member 21 to the first side bracket 25 is a welded portion W14 whose position is shown in black in FIG. 13. The welded portion W14 exists only on the lower surface of the bottom plate portion 21a. The entire portion of the frame member 21 on one side of the second lower end plate portion 23f remains in an open cross section that opens upward. Here, the reason why the connection portion between the first side bracket 25 and the frame member 21 is limited to the lower surface of the bottom plate portion 21a is to suppress vibration of the first side bracket 25 in the vehicle width direction.
図1に示す他方側の支持部材24については、一方側の支持部材23に対して前述の面対称性をもった構造であるので、概要を述べるに留める。
The support member 24 on the other side shown in FIG. 1 has a structure that has the above-mentioned plane symmetry with respect to the support member 23 on the one side, so only an outline will be described.
他方側の支持部材24は、中央ブラケット22に対して他方側に寄った位置で前板部21b及び後板部21cに固定された第一及び第二の脚板部24a,24bを有し、他方側の第二ステップ部14を支えることができる。これら第一及び第二の脚板部24a,24bは、それぞれ車幅方向に延びる下端板部24c,24dと、下端板部24c,24dから上方側に曲げられた上行板部24e,24fと、を有する。
The support member 24 on the other side has first and second leg plate parts 24a and 24b fixed to the front plate part 21b and the rear plate part 21c at a position closer to the other side with respect to the center bracket 22, and The second step part 14 on the side can be supported. These first and second leg plate portions 24a, 24b include lower end plate portions 24c, 24d extending in the vehicle width direction, and ascending plate portions 24e, 24f bent upward from the lower end plate portions 24c, 24d. have
前板部21b及び後板部21cは、それぞれ第一の脚板部24aに溶接された第一の上端部21m,21nと、第一の上端部21m,21nに対して他方側に寄った位置で第二の脚板部24bに溶接された第二の上端部21o,21pと、を有する。前板部21bの他方側に形成された第一の上端部21mと、後板部21cの他方側に形成された第一の上端部21nは、それぞれ第一の脚板部24aの下端板部24c及び上行板部24eに接する切欠き状に形成されている(図3参照)。
The front plate part 21b and the rear plate part 21c have first upper end parts 21m and 21n welded to the first leg plate part 24a, and a position closer to the other side with respect to the first upper end parts 21m and 21n, respectively. It has second upper end portions 21o and 21p welded to the second leg plate portion 24b. The first upper end portion 21m formed on the other side of the front plate portion 21b and the first upper end portion 21n formed on the other side of the rear plate portion 21c are the lower end plate portion 24c of the first leg plate portion 24a, respectively. and is formed in a notch shape in contact with the ascending plate portion 24e (see FIG. 3).
踏荷重が他方側の第二ステップ部14に負荷されたとき、他方側の支持部材24は、他方側の第二ステップ部14を下方から支えることができる。この際、他方側の第一の脚板部24aは、他方側の第二ステップ部14の一方側(すなわち第一ステップ部11側)の端部を支え、第二の脚板部23bは、他方側の第二ステップ部14を下方から支えることになる。その踏荷重が他方側の支持部材24を介して前板部21bと後板部21cに作用しても、前板部21bと後板部21cに固定された第一及び第二の脚板部24a,24bの抵抗により、口開きが防止される。
When a pedal load is applied to the second step portion 14 on the other side, the support member 24 on the other side can support the second step portion 14 on the other side from below. At this time, the first leg plate part 24a on the other side supports the end part on one side (that is, the first step part 11 side) of the second step part 14 on the other side, and the second leg plate part 23b supports the end part on the other side. This will support the second step part 14 from below. Even if the pedal load acts on the front plate part 21b and the rear plate part 21c via the support member 24 on the other side, the first and second leg plate parts 24a fixed to the front plate part 21b and the rear plate part 21c , 24b prevents the mouth from opening.
また、図1に示す第二のサイドブラケット26については、第一のサイドブラケット25に対して前述の面対称性をもった構造であるので、その説明を省略する。
Further, the second side bracket 26 shown in FIG. 1 has a structure that has the above-mentioned plane symmetry with respect to the first side bracket 25, so a description thereof will be omitted.
このリヤバンパー構造は、上述のように、車幅方向の中央部に形成された第一ステップ部11と、第一ステップ部11に対して車幅方向の片側(一方側又は他方側)に寄った位置で第一ステップ部11よりも高く形成された第二ステップ部12,14を有するリヤバンパーフェイシャ10と、リヤバンパーフェイシャ10の内側に配置されたバンパーリンフォース20と、を備えるものである。
As described above, this rear bumper structure includes a first step portion 11 formed at the center portion in the vehicle width direction, and a portion located on one side (one side or the other side) in the vehicle width direction with respect to the first step portion 11. The present invention includes a rear bumper fascia 10 having second step parts 12 and 14 formed higher than the first step part 11 at a position where the rear bumper fascia 10 is located higher than the first step part 11, and a bumper reinforcement 20 disposed inside the rear bumper fascia 10. .
そのバンパーリンフォース20が、第二ステップ部12,14の下方と第一ステップ部11の下方との間に亘る底板部21aと、底板部21aの前方側から上方に延びる前板部21bと、底板部21aの後方側から上方に延びる後板部21cと、を一体に有しかつ前板部21bと後板部21c間を車幅方向の全長に亘って上方に開いた開断面を有するフレーム部材21を備える。これにより、全長に亘って閉断面のフレームに比してフレーム部材21を軽量化すると共に、踏荷重が上方へ向いた前板部21bと後板部21cに作用するので、フレーム部材21の開放口を前後方向に向けた場合に比して前板部21bと後板部21cが踏荷重の作用によって撓みにくくなり、踏荷重に対するバンパーリンフォース20の剛性向上に有効である。さらに、そのバンパーリンフォース20が、第一ステップ部11の下方で前記開断面を覆うように前板部21b及び後板部21cに固定され第一ステップ部11を支える中央ブラケット22と、中央ブラケット22に対して前記片側(一方側又は他方側)に寄った位置で前記開断面を覆うように前板部21b及び後板部21cに固定された第一及び第二の脚板部23a,23b,24a,24bを有して第二ステップ部12,14を支える支持部材23,24と、を具備する。したがって、踏荷重が作用する第一ステップ部11、第二ステップ部12,14を支えるための剛性をもった中央ブラケット22、一支持部材23,24を利用して開断面のフレーム部材21を踏荷重が作用する要所で閉断面化し、車幅方向の広い範囲に亘ってフレーム部材21の口開きを防止することができ、これにより、バンパーリンフォース20の重量増加を避けつつ、踏荷重に対するバンパーリンフォース20の剛性を十分に確保することができる。したがって、このリヤバンパー構造は、リヤバンパーフェイシャ10に設けた一段目の第一ステップ部11と、二段目の第二ステップ部12,14と、を支えるバンパーリンフォース20の剛性確保と軽量化の両立を図ることができる。
The bumper rinse force 20 extends between a bottom plate part 21a between the lower part of the second step parts 12, 14 and the lower part of the first step part 11, and a front plate part 21b extending upward from the front side of the bottom plate part 21a. A frame that integrally includes a rear plate part 21c extending upward from the rear side of the bottom plate part 21a, and has an open cross section that is open upward over the entire length in the vehicle width direction between the front plate part 21b and the rear plate part 21c. A member 21 is provided. This reduces the weight of the frame member 21 over the entire length compared to a frame with a closed cross section, and since the pedal load acts on the upwardly facing front plate portion 21b and rear plate portion 21c, the frame member 21 can be opened. The front plate part 21b and the rear plate part 21c are less likely to bend due to the pedal load than when the mouth is oriented in the front-rear direction, which is effective in improving the rigidity of the bumper reinforcement 20 against the pedal load. Furthermore, the bumper rinse force 20 is fixed to the front plate part 21b and the rear plate part 21c so as to cover the open section below the first step part 11, and supports the first step part 11, and the central bracket First and second leg plate parts 23a, 23b fixed to the front plate part 21b and the rear plate part 21c so as to cover the open cross section at a position closer to the one side (one side or the other side) with respect to 22, Support members 23 and 24 having 24a and 24b and supporting the second step parts 12 and 14 are provided. Therefore, the frame member 21 with an open cross section is stepped on using the central bracket 22 and the supporting members 23 and 24, which have rigidity to support the first step part 11 and the second step parts 12 and 14 on which the stepping load acts. The cross-section is closed at key points where loads are applied, and it is possible to prevent the frame member 21 from opening over a wide range in the vehicle width direction.Thereby, while avoiding an increase in the weight of the bumper reinforcement 20, it is possible to reduce the resistance to pedal loads. Sufficient rigidity of the bumper reinforcement 20 can be ensured. Therefore, this rear bumper structure secures the rigidity and reduces the weight of the bumper reinforcement 20 that supports the first step part 11 of the first stage and the second step parts 12 and 14 of the second stage provided on the rear bumper fascia 10. It is possible to achieve both.
また、支持部材23,24が、第二ステップ部12,14の第一ステップ部11側の端部を支える第一の脚板部23a,24aと、第一の脚板部23a,24aよりも前記片側(一方側又は他方側)に位置し、第二ステップ部12,14を下方から支える第二の脚板部23b,24bと、を含む。これにより、第二ステップ部12,14を車幅方向に幅広く支持することができると共に、そのための第一及び第二の脚板部23a,24a,23b,24bを利用してフレーム部材21の前記片側(一方側又は他方側)を車幅方向に幅広く補強してフレーム部材21の前記片側(一方側又は他方側)での口開きを防止することができる。
Further, the supporting members 23 and 24 support the first leg plate parts 23a and 24a that support the ends of the second step parts 12 and 14 on the first step part 11 side, and the one side of the first leg plate parts 23a and 24a. Second leg plate parts 23b and 24b are located on one side or the other side and support the second step parts 12 and 14 from below. As a result, the second step portions 12 and 14 can be widely supported in the vehicle width direction, and the first and second leg plate portions 23a, 24a, 23b, and 24b are used to support the second step portions 12 and 14 on one side of the frame member 21. (one side or the other side) can be reinforced widely in the vehicle width direction to prevent the frame member 21 from opening on one side (one side or the other side).
また、第一及び第二の脚板部23a,23b,24a,24bが、それぞれ車幅方向に延びる下端板部23e,23f,24c,24dと、下端板部23e,23f,24c,24dから上方側に曲げられた上行板部23g,23h,24e,24fと、を有し、前板部21b及び後板部21cが、それぞれ第一の脚板部23aに溶接された第一の上端部21i,21j,21m,21nと、第一の上端部21i,21jに対して前記片側に寄った位置で第二の脚板部23bに溶接された第二の上端部21k,21l,21o,21pと、を有し、第一及び第二の上端部21i~21pのうち、少なくとも一か所の上端部21i,21j,21m,21nが、対応の脚板部23a,24aの下端板部23e,24c及び上行板部23g,24eに接する切欠き状に形成されている。これにより、これらの溶接長を長くすることができる。前板部21b及び後板部21cに対する中央ブラケット22、支持部材23,24の総合的な溶接長を大きくする程、口開き防止を強化するのに有効である。したがって、このリヤバンパー構造は、前述の切欠き状によって脚板部23a,24aと前板部21b、後板部21cの溶接長を長くし、踏荷重に対するバンパーリンフォース20の剛性確保を図り易くすることができる。
Further, the first and second leg plate portions 23a, 23b, 24a, and 24b are connected to lower end plate portions 23e, 23f, 24c, and 24d extending in the vehicle width direction, and upper side from the lower end plate portions 23e, 23f, 24c, and 24d, respectively. Ascending plate portions 23g, 23h, 24e, 24f are bent, and the front plate portion 21b and the rear plate portion 21c are respectively welded to the first leg plate portion 23a. , 21m, 21n, and second upper end portions 21k, 21l, 21o, 21p welded to the second leg plate portion 23b at positions closer to one side than the first upper end portions 21i, 21j. Among the first and second upper end portions 21i to 21p, at least one upper end portion 21i, 21j, 21m, 21n is connected to the lower end plate portions 23e, 24c of the corresponding leg plate portions 23a, 24a and the ascending plate portion. It is formed in the shape of a notch in contact with 23g and 24e. Thereby, the length of these welds can be increased. The larger the overall welding length of the central bracket 22 and the supporting members 23, 24 to the front plate part 21b and the rear plate part 21c is, the more effective it is to strengthen the prevention of opening. Therefore, in this rear bumper structure, the welding length of the leg plate parts 23a, 24a, the front plate part 21b, and the rear plate part 21c is lengthened by the above-mentioned notch shape, and it is easy to ensure the rigidity of the bumper reinforcement 20 against the pedal load. be able to.
なお、この実施形態では、第一の脚板部23a,24aについて溶接長を長くするだけで十分な剛性を確保することができる例であるため、第二の脚板部23b,24bについては溶接長を長くしていないが、更なる剛性向上を図る場合には第二の脚板部23b,24bについても溶接長を長くすればよい。
Note that this embodiment is an example in which sufficient rigidity can be secured simply by increasing the welding length for the first leg plates 23a and 24a, so the welding length for the second leg plates 23b and 24b is increased. Although the welding length is not made longer, in order to further improve the rigidity, the welding length of the second leg plate portions 23b and 24b may also be made longer.
また、バンパーリンフォース20が、フレーム部材21の車幅方向の一端部に接続されたサイドブラケット25,26をさらに具備し、サイドブラケット25,26に対するフレーム部材21の接続部としての溶接部W14が底板部21aのみに存在している。これにより、サイドブラケット25,26の車幅方向の振動を抑えることができる。
The bumper reinforcement 20 further includes side brackets 25 and 26 connected to one end of the frame member 21 in the vehicle width direction, and a welded portion W14 as a connection portion of the frame member 21 to the side brackets 25 and 26 is provided. It exists only in the bottom plate portion 21a. Thereby, vibration of the side brackets 25 and 26 in the vehicle width direction can be suppressed.
また、フレーム部材21が、底板部21aを部分的に下方へ押し出した膨出部21dの下端に締結座面21fを有し、リヤバンパーフェイシャ10が、締結座面21fに締結された下端壁部19を有する。これにより、締結座面21fと下端壁部19間の高低差を底板部21a側から抑制して、締結時に下端壁部19と締結座面21f間に隙間が生じることを防ぎ、ひいては、下端壁部19付近が外力の作用時に撓みにくくして、外力に対するリヤバンパーフェイシャ10の下部の剛性を向上させることができる。
Further, the frame member 21 has a fastening seat surface 21f at the lower end of the bulging portion 21d that partially pushes out the bottom plate portion 21a downward, and the rear bumper fascia 10 has a lower end wall portion fastened to the fastening seat surface 21f. It has 19. This suppresses the height difference between the fastening seat surface 21f and the lower end wall 19 from the bottom plate part 21a side, prevents a gap from forming between the lower end wall 19 and the fastening seat surface 21f during fastening, and furthermore, the lower end wall By making the vicinity of the portion 19 less likely to bend when an external force is applied, the rigidity of the lower part of the rear bumper fascia 10 against external forces can be improved.
また、リヤバンパーフェイシャ10が、第一ステップ部11に対して車幅方向の両側(一方側及び他方側)にそれぞれ第二ステップ部12,14を有し、バンパーリンフォース20が、中央ブラケット22に対して車幅方向の両側(一方側及び他方側)にそれぞれ支持部材23,24を有する。これにより、リヤバンパーフェイシャ10及びバンパーリンフォース20の構造を車幅方向の両側でバランスよく設けつつ、両第二ステップ部12,14を支えるバンパーリンフォース20の剛性確保と軽量化を図ることができる。
Further, the rear bumper fascia 10 has second step parts 12 and 14 on both sides (one side and the other side) in the vehicle width direction with respect to the first step part 11, and the bumper reinforcement 20 has second step parts 12 and 14 on both sides (one side and the other side) of the first step part 11, Support members 23 and 24 are respectively provided on both sides (one side and the other side) in the vehicle width direction. As a result, the structure of the rear bumper fascia 10 and the bumper reinforcement 20 can be provided in a well-balanced manner on both sides in the vehicle width direction, while securing the rigidity and reducing the weight of the bumper reinforcement 20 that supports both second step parts 12 and 14. can.
なお、この実施形態では、第一の脚板部23a,24aを備えたブラケットと、第二の脚板部23b,24bを備えたブラケットと、を含む複数のブラケットで各支持部材23,24をフレーム部材21上に構築した例を示したが、本発明において支持部材の構造は特に限定されず、支持部材の構成要素としてフレーム部材上に配置する部材でフレーム部材の閉断面化を図ればよい。例えば、第二ステップ部の車幅方向長さ等に応じて第二の脚板部を省いたり、第一、第二の脚板部とは異なる他の脚板部を追加してフレーム部材の閉断面化に利用したりすることが可能である。また、第一の脚板部及び第二の脚板部を一体に備えたブラケットを採用することも可能である。また、この実施形態では、第二ステップ部12,14を車両1の車幅方向の両側に設け、これに対応して支持部材23,24を設けた例を示したが、第二ステップ部、支持部材を車両の車幅方向片側だけに設ける態様も本発明の範囲に含まれる。
In this embodiment, each support member 23, 24 is connected to a frame member by a plurality of brackets including a bracket provided with first leg plate portions 23a, 24a and a bracket provided with second leg plate portions 23b, 24b. Although the structure of the supporting member is not particularly limited in the present invention, it is only necessary to use a member disposed on the frame member as a component of the supporting member to make the frame member have a closed cross section. For example, depending on the length of the second step in the vehicle width direction, the second leg plate may be omitted, or another leg plate different from the first and second leg plates may be added to create a closed cross-section of the frame member. It is possible to use it for Furthermore, it is also possible to employ a bracket that integrally includes a first leg plate portion and a second leg plate portion. Further, in this embodiment, an example was shown in which the second step portions 12 and 14 were provided on both sides of the vehicle 1 in the vehicle width direction, and supporting members 23 and 24 were provided correspondingly, but the second step portions, A mode in which the support member is provided only on one side of the vehicle in the vehicle width direction is also included within the scope of the present invention.
今回開示された実施形態はすべての点で例示であって制限的なものではないと考えられるべきである。したがって、本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。
The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. Therefore, the scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.
以上、各種の実施の形態について説明したが、本発明はかかる例に限定されないことは言うまでもない。当業者であれば、特許請求の範囲に記載された範疇内において、各種の変更例又は修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。また、発明の趣旨を逸脱しない範囲において、上記実施の形態における各構成要素を任意に組み合わせてもよい。
Although various embodiments have been described above, it goes without saying that the present invention is not limited to such examples. It is clear that those skilled in the art can come up with various changes or modifications within the scope of the claims, and these naturally fall within the technical scope of the present invention. Understood. Further, each of the constituent elements in the above embodiments may be arbitrarily combined without departing from the spirit of the invention.
なお、本出願は、2022年3月31日出願の日本特許出願(特願2022-058045)に基づくものであり、その内容は本出願の中に参照として援用される。
Note that this application is based on a Japanese patent application (Japanese Patent Application No. 2022-058045) filed on March 31, 2022, and the contents thereof are incorporated as a reference in this application.
10 リヤバンパーフェイシャ
11 第一ステップ部
12,14 第二ステップ部
19 下端壁部
20 バンパーリンフォース
21 フレーム部材
21a 底板部
21b 前板部
21c 後板部
21d 膨出部
21f 締結座面
21i,21j,21m,21n 第一の上端部
21k,21l,21o,21p 第二の上端部
22 中央ブラケット
23,24 支持部材
23a,24a 第一の脚板部
23b,24b 第二の脚板部
23e,23f,24c,24d 下端板部
23g,23h,24e,24f 上行板部
25,26 サイドブラケット
W14 溶接部(接続部) 10Rear bumper fascia 11 First step part 12, 14 Second step part 19 Lower end wall part 20 Bumper reinforcement 21 Frame member 21a Bottom plate part 21b Front plate part 21c Rear plate part 21d Swelling part 21f Fastening seat surface 21i, 21j, 21m, 21n First upper end portion 21k, 21l, 21o, 21p Second upper end portion 22 Central bracket 23, 24 Support member 23a, 24a First leg plate portion 23b, 24b Second leg plate portion 23e, 23f, 24c, 24d Lower end plate portions 23g, 23h, 24e, 24f Ascending plate portions 25, 26 Side bracket W14 Welded portion (connection portion)
11 第一ステップ部
12,14 第二ステップ部
19 下端壁部
20 バンパーリンフォース
21 フレーム部材
21a 底板部
21b 前板部
21c 後板部
21d 膨出部
21f 締結座面
21i,21j,21m,21n 第一の上端部
21k,21l,21o,21p 第二の上端部
22 中央ブラケット
23,24 支持部材
23a,24a 第一の脚板部
23b,24b 第二の脚板部
23e,23f,24c,24d 下端板部
23g,23h,24e,24f 上行板部
25,26 サイドブラケット
W14 溶接部(接続部) 10
Claims (6)
- 車幅方向の中央部に形成された第一ステップ部と、前記第一ステップ部に対して車幅方向の片側に寄った位置で前記第一ステップ部よりも高く形成された第二ステップ部とを有するリヤバンパーフェイシャと、
前記リヤバンパーフェイシャの内側に配置されたバンパーリンフォースと、を備え、
前記バンパーリンフォースが、
前記第二ステップ部の下方と前記第一ステップ部の下方との間に亘る底板部と、前記底板部の前方側から上方に延びる前板部と、前記底板部の後方側から上方に延びる後板部とを一体に有しかつ前記前板部と前記後板部間を車幅方向の全長に亘って上方に開いた開断面を有するフレーム部材と、
前記第一ステップ部の下方で前記開断面を覆うように前記前板部及び前記後板部に固定され前記第一ステップ部を支える中央ブラケットと、
前記中央ブラケットに対して前記片側に寄った位置で前記開断面を覆うように前記前板部及び前記後板部に固定された脚板部を有して前記第二ステップ部を支える支持部材と、を具備するリヤバンパー構造。 a first step portion formed at a central portion in the vehicle width direction; and a second step portion formed higher than the first step portion at a position closer to one side in the vehicle width direction with respect to the first step portion. a rear bumper fascia having;
a bumper reinforcement located inside the rear bumper fascia;
The bumper rinse force is
a bottom plate section extending between the lower part of the second step part and the lower part of the first step part; a front plate part extending upward from the front side of the bottom plate part; and a rear plate part extending upward from the rear side of the bottom plate part. a frame member that integrally includes a plate portion and has an open cross section that is open upward over the entire length in the vehicle width direction between the front plate portion and the rear plate portion;
a central bracket fixed to the front plate part and the rear plate part so as to cover the open section below the first step part and supporting the first step part;
a support member that supports the second step portion and has a leg plate portion fixed to the front plate portion and the rear plate portion so as to cover the open cross section at a position closer to the one side with respect to the central bracket; A rear bumper structure equipped with - 前記支持部材が、
前記第二ステップ部の前記第一ステップ部側の端部を支える第一の前記脚板部と、
前記第一の脚板部よりも前記片側に位置し、前記第二ステップ部を下方から支える第二の前記脚板部と、
を含む請求項1に記載のリヤバンパー構造。 The support member is
a first leg plate portion that supports an end of the second step portion on the first step portion side;
a second leg plate part that is located on one side of the first leg plate part and supports the second step part from below;
The rear bumper structure according to claim 1, comprising: - 前記第一及び第二の脚板部が、それぞれ車幅方向に延びる下端板部と、前記下端板部から上方側に曲げられた上行板部とを有し、
前記前板部及び前記後板部が、それぞれ前記第一の脚板部に溶接された第一の上端部と、前記第一の上端部に対して前記片側に寄った位置で前記第二の脚板部に溶接された第二の上端部とを有し、
前記第一及び第二の上端部のうち、少なくとも一か所の上端部が、対応の前記脚板部の下端板部及び上行板部に接する切欠き状に形成されている請求項2に記載のリヤバンパー構造。 The first and second leg plate portions each have a lower end plate portion extending in the vehicle width direction, and an ascending plate portion bent upward from the lower end plate portion,
The front plate portion and the rear plate portion each have a first upper end portion welded to the first leg plate portion, and a second leg plate at a position closer to the one side with respect to the first upper end portion. a second upper end welded to the second upper end;
The upper end portion of at least one of the first and second upper end portions is formed in a notch shape that contacts the lower end plate portion and the ascending plate portion of the corresponding leg plate portion. Rear bumper structure. - 前記バンパーリンフォースが、前記フレーム部材の車幅方向の一端部に接続されたサイドブラケットをさらに具備し、
前記サイドブラケットに対する前記フレーム部材の接続部が、前記底板部のみに存在している請求項1から3のいずれか1項に記載のリヤバンパー構造。 The bumper reinforcement further includes a side bracket connected to one end of the frame member in the vehicle width direction,
The rear bumper structure according to any one of claims 1 to 3, wherein a connection portion of the frame member to the side bracket exists only in the bottom plate portion. - 前記フレーム部材が、前記底板部を部分的に下方へ押し出した膨出部の下端に締結座面を有し、前記リヤバンパーフェイシャが、前記締結座面に締結された下端壁部を有する請求項1から4のいずれか1項に記載のリヤバンパー構造。 The frame member has a fastening seat surface at a lower end of a bulge that partially pushes out the bottom plate part downward, and the rear bumper fascia has a lower end wall part fastened to the fastening seat surface. The rear bumper structure according to any one of 1 to 4.
- 前記リヤバンパーフェイシャが、前記第一ステップ部に対して車幅方向の両側にそれぞれ前記第二ステップ部を有し、
前記バンパーリンフォースが、前記中央ブラケットに対して車幅方向の両側にそれぞれ前記支持部材を有する請求項1から5のいずれか1項に記載のリヤバンパー構造。 The rear bumper fascia has the second step portions on both sides of the first step portion in the vehicle width direction, and
The rear bumper structure according to any one of claims 1 to 5, wherein the bumper reinforcement has the support members on both sides of the center bracket in the vehicle width direction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2022058045 | 2022-03-31 | ||
JP2022-058045 | 2022-03-31 |
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PCT/JP2023/011031 WO2023189862A1 (en) | 2022-03-31 | 2023-03-20 | Rear bumper structure |
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US4023841A (en) * | 1975-08-15 | 1977-05-17 | Reynolds Metals Company | Bumper construction and method of making same |
JPH11235958A (en) * | 1998-02-20 | 1999-08-31 | Isuzu Motors Ltd | Vehicle body bumper structure |
US20040041417A1 (en) * | 2002-08-28 | 2004-03-04 | Paul Ferrigan | Bumper assembly for vehicle |
JP2006069279A (en) * | 2004-08-31 | 2006-03-16 | Mazda Motor Corp | Rear structure for vehicle body |
-
2023
- 2023-03-20 WO PCT/JP2023/011031 patent/WO2023189862A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US4023841A (en) * | 1975-08-15 | 1977-05-17 | Reynolds Metals Company | Bumper construction and method of making same |
JPH11235958A (en) * | 1998-02-20 | 1999-08-31 | Isuzu Motors Ltd | Vehicle body bumper structure |
US20040041417A1 (en) * | 2002-08-28 | 2004-03-04 | Paul Ferrigan | Bumper assembly for vehicle |
JP2006069279A (en) * | 2004-08-31 | 2006-03-16 | Mazda Motor Corp | Rear structure for vehicle body |
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