WO2012049933A1 - 車体フロア構造 - Google Patents
車体フロア構造 Download PDFInfo
- Publication number
- WO2012049933A1 WO2012049933A1 PCT/JP2011/070860 JP2011070860W WO2012049933A1 WO 2012049933 A1 WO2012049933 A1 WO 2012049933A1 JP 2011070860 W JP2011070860 W JP 2011070860W WO 2012049933 A1 WO2012049933 A1 WO 2012049933A1
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- WO
- WIPO (PCT)
- Prior art keywords
- frame
- floor
- cross member
- fastening
- bead
- Prior art date
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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
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- 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
- B62D25/2009—Floors or bottom sub-units in connection with other superstructure subunits
- B62D25/2018—Floors or bottom sub-units in connection with other superstructure subunits the subunits being front structures
Definitions
- the present invention relates to a vehicle body floor structure in which a rear end of a floor frame is connected to a cross member, and a floor frame and a floor panel form a closed cross-sectional area.
- the left and right floor frames extend from the rear ends of the left and right front side frames toward the rear of the vehicle body, and the rear ends of the extended floor frames are connected to the cross member.
- This floor frame is formed in a substantially U-shaped cross section by the inner side wall in the vehicle width direction, the outer side wall in the vehicle width direction, and the bottom, and is formed into a closed cross section together with the floor frame by mounting the floor panel. (See, for example, Patent Document 1).
- a floor frame having a substantially U-shaped cross section is divided into a front floor frame and a rear floor frame.
- the rear floor frame is spot welded to the cross member alone.
- the rear floor frame is spot welded to the floor panel, and the front end of the rear floor frame is superimposed on the rear end of the front floor frame.
- the front and rear floor frames are connected to form a floor frame.
- the floor frame is coupled to the floor panel, and the floor frame and the floor panel form a closed cross section.
- the present invention provides a vehicle body floor structure capable of efficiently transmitting a load acting from the front end of the floor frame to the rear of the vehicle body from the floor frame to the cross member, and suitably supporting the transmitted load by the cross member. As an issue.
- the vehicle body floor structure includes a front side frame, and a floor frame extending rearward from the rear end of the front side frame.
- the cross member to which the rear end portion of the floor frame is connected and the floor frame connected to the cross member are formed in a substantially U-shaped cross section by side walls and a bottom portion inside and outside in the vehicle width direction
- the floor frame is a fastening member to be fastened in a state where the bottom portion of the rear end portion is overlapped with the bottom portion of the cross member, and the fastening member And a linear bead protruding downward at the inner and outer sides in the vehicle width direction of the fastened frame fastening portion, and the linear bead projects downward, whereby the frame fastening portion
- a vehicle floor structure is provided which is recessed relative to the linear bead.
- the linear bead is formed along a ridge line of the floor frame.
- the linear bead according to claim 3 preferably has a bottom projecting downward from the head of the fastening member.
- the linear bead is provided over the entire length from the front end to the rear end of the floor frame.
- the floor panel has a panel bead projected downward at a portion on the vehicle body rear side of the cross member, and the panel bead is disposed behind the linear bead. It is extended continuously from the end toward the rear of the vehicle body.
- the floor frame is superimposed on the floor panel and the cross member from below as described in claim 6, so that the cross member is sandwiched between the floor frame and the floor panel, and the floor frame
- the side walls on the inner and outer sides in the vehicle width direction are connected to the floor panel by spot welding, and the bottom of the rear end of the floor frame is fastened to the bottom of the cross member by the fastening member.
- the fastening member is a bolt, and a nut for fastening the bolt is provided on the bottom outer surface of the cross member.
- a linear central bead extending toward the head of the fastening member is formed between the linear beads in the floor frame.
- the frame fastening portion is formed at a portion corresponding to the bottom of the cross member.
- the bottom portion is overlapped with the bottom portion of the cross member and fastened with a bolt, and the linear bead is directed downward inward and outward in the vehicle width direction of the frame fastening portion. I made it stand out.
- the frame fastening portion can be reinforced with the linear bead by projecting the linear bead inward and outward in the vehicle width direction.
- the applied load can be efficiently transmitted to the frame fastening portion. Furthermore, the load transmitted to the frame fastening portion can be efficiently transmitted from the frame fastening portion to the cross member via the bolt. Thereby, the load efficiently transmitted through the bolt can be dispersed to the cross member and suitably supported.
- the linear bead is formed along the ridge line of the floor frame.
- the ridge line of the floor frame is a portion having high rigidity to the load in the longitudinal direction of the vehicle body.
- the floor frame is not coupled to the floor panel. Even in the case of this type of vehicle, the load acting on the front end portion of the floor frame can be efficiently transmitted by the linear bead by forming the linear bead in a ridgeline to enhance the rigidity of the linear bead.
- the bottom of the linear bead is provided below the head of the bolt. Therefore, the head of the bolt can be accommodated between the inner and outer linear beads so that the head of the bolt does not protrude downward from the inner and outer linear beads in the vehicle width direction. Thus, the head of the bolt can be protected by the inner and outer linear beads in the vehicle width direction.
- the linear bead is provided over the entire length from the front end to the rear end of the floor frame. Therefore, the bottom portion of the floor frame can be formed flat in the longitudinal direction of the vehicle body. Thereby, the rectification effect of the air which flows through the bottom of a floor frame can be acquired.
- the load applied to the front end of the floor frame can be more efficiently transmitted by the linear bead.
- the panel bead is made to project downward at a portion of the floor panel at the rear of the cross member in the vehicle body. Furthermore, this panel bead was extended so as to continue from the rear end of the linear bead toward the rear of the vehicle body.
- a plurality of cross members are provided in the vehicle body floor structure at predetermined intervals in the longitudinal direction of the vehicle body. That is, in addition to the cross member in which the bottom portion of the floor frame is bolted, another cross member (hereinafter referred to as “rear cross member”) is provided behind the cross member. Therefore, the panel bead can be interposed between the rear end portion of the linear bead and the rear cross member by extending the panel bead toward the rear of the vehicle body.
- the load applied to the front end of the floor frame can be efficiently transmitted from the frame fastening portion to the cross member through the bolt and the remaining load can be transmitted to the rear cross member through the panel bead. Therefore, the load acting on the front end portion of the floor frame can be dispersed to the two cross members and supported more suitably.
- the side walls in the vehicle width direction of the floor frame are joined by spot welding to the floor panel, and the bottom of the floor frame is bolted to the bottom of the cross member.
- the cross member is coupled to the floor panel such that the cross member and the floor panel form a closed cross section. Therefore, it is difficult to couple the bottom of the floor frame to the bottom of the cross member by spot welding. Therefore, the bottom of the floor frame is bolted to the bottom of the cross member. Thereby, the bottom of the floor frame can be easily attached to the bottom of the cross member, and the assemblability of the vehicle floor structure can be enhanced.
- the nut can be made to project downward from the bottom by providing the nut for fastening the bolt on the outer surface of the bottom of the cross member.
- the bottom of the floor frame may be spaced downwardly from the bottom of the cross member to accommodate the nuts projecting from the bottom in the floor frame.
- the area of the closed cross-sectional area formed by the rear end of the floor frame and the cross member can be secured larger than the area of the closed cross-sectional area obtained by overlapping the bottom of the floor frame on the bottom of the cross member.
- the rigidity of the closed cross section formed by the rear end portion of the floor frame and the cross member can be enhanced. Therefore, it is possible to prevent the rear end of the floor frame from being deformed by the load acting from the front end of the floor frame to the rear of the vehicle body, and to transmit the load to the cross member more efficiently.
- the linear central bead is formed between the linear beads on the inner and outer sides in the vehicle width direction, and the linear central bead is extended toward the head of the bolt. Therefore, a part of the load acting from the front end of the floor frame to the rear of the vehicle body can be efficiently transmitted to the head of the bolt through the linear central bead. Thus, the load applied from the front end of the floor frame to the rear of the vehicle body can be more efficiently transmitted to the cross member through the bolt.
- the frame fastening portion i.e., the recess
- the frame fastening portion is formed at a portion corresponding to the bottom of the cross member. Therefore, the frame fastening portion (recess) can be kept small. As a result, the rigidity of the floor frame can be enhanced, so that the load acting from the front end of the floor frame to the rear of the vehicle body can be more efficiently transmitted to the cross member.
- FIG. 1 is a bottom view showing a vehicle body floor structure according to a first embodiment of the present invention.
- FIG. 2 is an enlarged view of area 2 of FIG. 1;
- FIG. 2 is a perspective view of the right floor frame and center cross member shown in FIG. 1;
- FIG. 4 is an exploded perspective view of the right floor frame shown in FIG. 3;
- FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 3;
- FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 2; It is the figure seen from the direction of the arrow 7 of FIG.
- FIG. 8 is a cross-sectional view taken along line 8-8 of FIG.
- the vehicle body floor structure 10 is provided with an outer frame skeletal body 11 constituting an outer frame of the vehicle body floor and an inner skeletal body 12 provided inside the outer frame skeletal body 11.
- the outer frame skeleton body 11 includes left and right front side frames 15 extending in the longitudinal direction of the vehicle body, left and right outriggers 17 projected to the outside of the vehicle body from rear end portions 15a of the left and right front side frames 15, Left and right side sills 18 extended from the respective outer ends of the outrigger 17 to the rear of the vehicle body, and left and right rear frames 21 extended rearward from the rear end of the left and right side sills 18 respectively. And have.
- the outer frame skeleton body 11 includes left and right front pillars 23 raised from the front ends of the left and right side sills 18 and left and right upper frames 24 extended from the left and right front pillars 23 toward the front of the vehicle body. And have.
- a left wheel house 25 is provided between the left front side frame 15 and the left upper frame 24.
- a right wheel house 25 is provided between the right front side frame 15 and the right upper frame 24.
- dashboards 26 are provided on the left and right outriggers 17.
- the inner frame body 12 includes a front cross member 31 bridged to the front ends of left and right side sills 18, a central cross member (cross member) 33 provided on the rear side of the vehicle relative to the front cross member 31, and a central cross member A rear cross member 35 provided on the rear side of the vehicle than 33, a left floor frame 38 extending rearward from the rear end 15a of the left front side frame 15 and a rear end of the right front side frame 15 And a right floor frame 38 extended from the portion 15a toward the rear of the vehicle body.
- a front cross member 31 bridged to the front ends of left and right side sills 18, a central cross member (cross member) 33 provided on the rear side of the vehicle relative to the front cross member 31, and a central cross member A rear cross member 35 provided on the rear side of the vehicle than 33, a left floor frame 38 extending rearward from the rear end 15a of the left front side frame 15 and a rear end of the right front side frame 15 And a right floor frame 38 extended from the portion 15a toward the rear of the vehicle
- the front cross member 31 is a reinforcing member whose upper side is opened by being formed in a substantially U-shaped cross section by the front and rear wall portions 31a and 31b and the bottom portion 31c.
- the front cross member 31 extends in the vehicle width direction by being bridged to the front ends of the left and right side sills 18.
- the central cross member 33 is a reinforcing member whose upper side is opened by being formed into a substantially U-shaped cross section by the front and rear wall portions 41 and 42 and the bottom portion 43 as in the front cross member 31.
- the central cross member 33 extends in the vehicle width direction by being bridged over the centers 18 a of the left and right side sills 18.
- An attachment hole 44 (see FIGS. 4 and 6) is formed in the bottom 43 of the central cross member 33.
- the welding nut 45 is coupled to the inner surface 43 a of the bottom portion 43.
- the welding nut 45 is provided coaxially with the mounting hole 44 of the bottom portion 43.
- a front floor panel 47 is placed on the top of the front cross member 31 and the center cross member 33. Furthermore, the front floor panel 47 is placed on the top of the left and right floor frames 38. The front cross panel 31 is placed on the top of the front cross member 31 so that the front cross member 31 and the front floor panel 47 form a closed cross section.
- the central cross member 33 and the front floor panel 47 form a closed cross-sectional area 48 (see FIG. 6).
- the welding pieces 41a and 42a before and after the central cross member 33 are spot welded to the front floor panel 47.
- the central cross member 33 is attached to the front floor panel 47, and the central cross member 33 and the front floor panel 47 form a closed cross-sectional area 48.
- the rear cross member 35 is formed into a substantially U-shaped cross section by the front and rear wall portions 35 a and 35 b and the bottom portion 35 c in the same manner as the front cross member 31. It is. After that, the cross member 35 extends in the vehicle width direction by being bridged over the front end portions 21 a of the left and right rear frames 21.
- a rear floor panel 51 is placed on top of the central cross member 33 and the rear cross member 35. By mounting the rear floor panel 51 on the upper portion of the rear cross member 35, a closed cross-sectional site is formed by the rear cross member 35 and the rear floor panel 51.
- the right floor frame 38 includes a floor frame main body 54 extended from the rear end 15a (FIG. 1) of the right front side frame 15 toward the rear of the vehicle body; Fasten the center cross member 33 to the frame cover 55 provided on the frame, the frame legs 56 on the inner and outer sides in the vehicle width direction connecting the floor frame main body 54 to the front floor panel 47, and the rear end 54a of the floor frame main body 54 And fastening means 57.
- the frame leg 56 on the inner side in the vehicle width direction will be referred to as "the inner frame leg 56”
- the frame leg 56 on the outer side in the vehicle width direction will be referred to as the "outer frame leg 56".
- the impact load passes through the right front side frame 15 and the rear end from the front end 38b (FIG. 1) of the right floor frame 38. It is input toward the part 38a.
- the fastening means 57 comprises a welding nut 45 (see FIG. 6) joined by welding to the bottom 43 (inner surface 43a) of the central cross member 33, and a fastening bolt (fastening member) 58 screwable to the welding nut 45. ing.
- the floor frame main body 54 is formed in a substantially U-shaped cross section by the frame side wall 61 and the frame bottom portion (bottom portion) 62 on the inner and outer sides in the vehicle width direction.
- the frame side wall 61 on the inner side in the vehicle width direction will be referred to as “inner frame side wall 61”
- the frame side wall 61 on the outer side in the vehicle width direction will be referred to as “outer frame side wall 61”.
- the inner frame side wall 61 and the inner frame leg portion 56 form an inner side wall 39 (an inner side wall on the inner side in the vehicle width direction) of the right floor frame 38.
- the outer frame side wall 61 and the outer frame leg portion 56 form an outer side wall 39 (an outer side wall in the vehicle width direction) of the right floor frame 38.
- the upper ends 61 a of the inner and outer frame side walls 61 are closed by the frame cover 55.
- a lower end 56 a of the inner frame leg 56 is provided at the upper end 61 a of the inner frame side wall 61.
- a lower end 56 a of the outer frame leg 56 is provided at an upper end 61 a of the outer frame side wall 61.
- the inner joint piece 55a of the frame lid 55, the upper end 61a of the inner frame side wall 61, and the lower end 56a of the inner frame leg 56 are joined by spot welding.
- the outer joint piece 55a of the frame lid 55, the upper end 61a of the outer frame side wall 61, and the lower end 56a (i.e., the outer wall 39) of the outer frame leg 56 are connected by spot welding.
- the frame cover 55 and the inner and outer frame leg portions 56 are integrally coupled to the floor frame main body 54, thereby forming the right floor frame 38.
- the right floor frame 38 is attached to the front floor panel 47 by joining the joint pieces 56 b of the inner and outer frame legs 56 to the front floor panel 47 by spot welding.
- a portion 47a of the front floor panel 47 on the vehicle body front side of the central cross member 33 is formed in a concave shape upward.
- the central cross member 33 By forming the central cross member 33 in a concave shape, it is possible to accommodate a member such as a fuel tank below the front floor panel 47.
- the right floor frame 38 can be spot welded to the front floor panel 47 by providing the right floor frame 38 with the inner and outer frame legs 56. It is.
- the inner frame side wall 61 of the floor frame main body 54 is provided with an inner overhanging piece 64 at the rear end.
- the inner overhanging piece 64 has a panel piece 64 a that can abut the front floor panel 47 and a member piece 64 b that can abut the front wall 41 and the bottom 43 of the central cross member 33.
- the outer frame side wall 61 of the floor frame main body 54 is provided with an outer overhanging piece 64 at its rear end.
- the outer overhanging piece 64 has a panel piece 64 a that can contact the front floor panel 47 and a member piece 64 b that can contact the front wall 41 and the bottom 43 of the central cross member 33.
- the main portion 62a is formed to have the width W1
- the front half 62c of the rear end 62b is formed to be gradually wider from the width W1 to the width W2.
- the second half portion 62d of the second portion 62b is formed wide in the width dimension W2.
- the rear end portion 62 b of the frame bottom portion 62 has a frame fastening portion 66 formed at the center in the vehicle width direction and a linear bead 71 provided on the inner and outer sides in the vehicle width direction of the frame fastening portion 66.
- the frame fastening portion 66 is a recess formed to extend toward the rear of the vehicle body at the center in the vehicle width direction of the rear end portion 62b of the frame bottom portion 62.
- the frame fastening portion 66 has a front half 66a and a rear half 66b.
- the front half 66a is formed to be inclined such that the recess depth D gradually increases (that is, the depth of the recess gradually increases) from the front end 66c to the central portion 66d of the frame fastening portion 66 ing.
- the rear half 66b is formed to have a constant depth in a state where the recess depth dimension D is maximum, and the mounting hole 68 is formed.
- the mounting hole 68 of the frame fastening portion 66 is in contact with the mounting hole 44 of the bottom portion 43 in a state in which the rear end portion 62 b of the frame bottom portion 62 (the rear half 66 b of the frame fastening portion 66) is superimposed on the bottom portion 43 of the central cross member 33. And coaxially arranged.
- the fastening bolt 58 is inserted into the mounting hole 68 of the frame fastening portion 66 and the mounting hole 44 of the bottom portion 43, and the screw portion 58 c of the fastening bolt 58 is screwed to the welding nut 45.
- the rear end portion 62 b (specifically, the frame fastening portion 66) of the frame bottom portion 62 is fastened by the fastening bolt 58 in a state of being superimposed on the bottom portion 43 of the central cross member 33. That is, the rear end 38 a of the right floor frame 38 is connected to the central cross member 33 by a fastening bolt 58.
- the linear bead 71 protrudes downward inward and outward in the vehicle width direction of the frame fastening portion 66. ing.
- the frame fastening portion 66 is formed in a state of being recessed relative to the linear bead 71 by a recess depth dimension D.
- the linear bead 71 can be reinforced by the linear bead 71 by causing the linear bead 71 to project downward to the inside and outside of the frame joint portion 66 in the vehicle width direction.
- the linear bead 71 is a reinforcing protrusion formed linearly along a ridge line (ridge line) 54 b on the inner and outer sides in the vehicle width direction of the floor frame main body 54.
- the ridge line 54b on the inner side in the vehicle width direction is a convex angular portion formed by the intersection of the frame side wall 61 and the frame bottom 62 on the inner side in the vehicle width direction.
- the ridge line 54b on the outer side in the vehicle width direction is a convex angular portion formed by the intersection of the frame side wall 61 and the frame bottom 62 on the outer side in the vehicle width direction.
- the ridge lines 54b on the inner and outer sides in the vehicle width direction have high rigidity with respect to the load in the longitudinal direction of the vehicle body.
- the rigidity of the linear bead 71 can be further enhanced by forming the inner and outer linear beads 71 on the highly rigid ridge line 54b.
- the linear bead 71 is formed in a substantially trapezoidal shape in cross section by the projection side walls 71 a and 71 b on the inner and outer sides in the vehicle width direction, the projection bottom 71 c and the bottom 43 of the central cross member 33.
- the projection bottom portion 71 c is disposed below the head portion 58 a of the fastening bolt 58 by being provided at a position separated downward by H 1 dimension with respect to the bottom portion 43 of the central cross member 33. Therefore, the head 58a of the fastening bolt 58 is accommodated between the inner and outer linear beads 71 so that the head lower surface 58b of the head 58a does not protrude downward from the inner and outer linear beads 71 in the vehicle width direction. it can. Thereby, the head 58a of the fastening bolt 58 can be protected by the linear bead 71 on the inner and outer sides in the vehicle width direction.
- the left floor frame 38 is a member symmetrical with the right floor frame 38. Therefore, the constituent members of the left floor frame 38 are assigned the same reference numerals as the right floor frame 38, and the description of the left floor frame 38 is omitted.
- the front floor panel 47 is placed on the top of the central cross member 33.
- the central cross member 33 is attached to the front floor panel 47 by spot welding the front and rear joint pieces 41 a and 42 a of the central cross member 33 to the front floor panel 47.
- the central cross member 33 and the front floor panel 47 form a closed cross section 48.
- the frame cover 55 (see also FIG. 4) and the inner and outer frame legs 56 are integrally joined to the floor frame main body 54 to form the right floor frame 38.
- the inner and outer frame legs 56 of the right floor frame 38 are superimposed on the front floor panel 47 from the lower side as shown by arrow A.
- the frame bottom portion 62 (rear end portion 62b) of the right floor frame 38 is superimposed on the bottom portion 43 of the central cross member 33 as shown by arrow B from below.
- the inner and outer frame legs 56 of the right floor frame 38 are superimposed on the front floor panel 47 from below, and the rear end 62 b of the frame bottom 62 is placed on the bottom 43 of the central cross member 33. Overlay from below. As a result, the right floor frame 38 and the front floor panel 47 sandwich the front portion of the central cross member 33 (that is, the front wall portion 41 and the bottom portion 43).
- the screw portion 58 c of the fastening bolt 58 protruding from the mounting hole 44 of the bottom portion 43 is screwed to the welding nut 45. Therefore, the rear end 62 b (specifically, the frame fastening portion 66) of the frame bottom portion 62 can be fastened with the fastening bolt 58 in a state where the rear end portion 62 b is overlapped with the bottom portion 43 of the central cross member 33. Thus, the process of assembling the right floor frame 38 to the front floor panel 47 and the central cross member 33 is completed.
- the frame fastening portion 66 of the frame bottom portion 62 is fastened by the fastening bolt 58 in a state in which the frame fastening portion 66 is superimposed on the bottom portion 43 of the central cross member 33. Therefore, it is not necessary to couple the frame fastening portion 66 of the frame bottom 62 to the closed cross-sectional area 48 formed by the central cross member 33 and the front floor panel 47 by spot welding. Thereby, the frame fastening portion 66 of the frame bottom portion 62 can be easily attached to the bottom portion 43 of the central cross member 33, and the assemblability of the vehicle body floor structure 10 can be enhanced.
- the frame fastening portion 66 of the frame bottom portion 62 is fastened by a fastening bolt 58 in a state of being superimposed on the bottom portion 43 of the central cross member 33.
- the frame fastening portion 66 is reinforced by linear beads 71 on the inner and outer sides in the vehicle width direction.
- the impact load F1 passes from the front end 38b (FIG. 1) of the right floor frame 38 to the rear end 38a via the right front side frame 15 (FIG. 1). It is input towards.
- the load F1 acts like an arrow from the front end 38b of the right floor frame 38 toward the rear of the vehicle body, the applied load F1 is efficiently transmitted to the frame fastening part 66 as an arrow.
- the load F1 transmitted to the frame fastening portion 66 can be efficiently transmitted from the frame fastening portion 66 through the fastening bolt 58 to the central cross member 33 as indicated by the arrow.
- the load F1 efficiently transmitted through the fastening bolt 58 is dispersed to the central cross member 33, and the central cross member 33 can be suitably supported.
- the linear bead 71 is formed along the ridge line 54b inside and outside in the vehicle width direction of the right floor frame 38.
- the ridge lines 54b on the inner and outer sides in the vehicle width direction of the right floor frame 38 are portions having high rigidity with respect to the load in the vehicle longitudinal direction.
- the rigidity of the linear bead 71 is further enhanced by forming the linear bead 71 on the highly rigid ridge line 54b.
- the right floor frame 38 is not coupled to the front floor panel 47. Even in this type of vehicle, the load F1 acting on the front end portion 38b of the right floor frame 38 is a fastening bolt by forming the linear bead 71 on the ridge line 54b on the inner and outer sides in the vehicle width direction to enhance the rigidity of the linear bead 71 It is possible to communicate to 58 efficiently.
- the vehicle body floor structure 80 is provided with stiffeners (reinforcement members) 81 at the central cross member 33 of the first embodiment, and the other configuration is the same as the vehicle body floor structure 10 of the first embodiment. .
- the stiffener 81 is a reinforcing member disposed at the bottom 43 in the central cross member 33.
- the stiffener 81 includes a stiffener base 82 mountable on the inner surface 43a of the bottom 43, a front bending piece 83 provided at the front end of the stiffener base 82, and a rear bend provided at the rear end of the stiffener base 82. And a piece 84 of music.
- the stiffener base 82 is formed with a mounting hole 85, and a welding nut 45 is welded to the back surface 82a.
- the welding nut 45 is provided coaxially with the mounting hole 85.
- the welding nut 45 and the mounting hole 85 are coaxially arranged with respect to the mounting hole 44 of the bottom 43 and the mounting hole 68 of the frame fastening portion 66.
- the fastening bolt 58 is inserted into the mounting holes 68, 44, 85, and the screw portion 58 c of the fastening bolt 58 is screwed to the welding nut 45.
- the frame fastening portion 66 of the right floor frame 38 is fastened to the bottom portion 43 and the stiffener 81 via the fastening bolt 58.
- the central cross member 33 is reinforced by the stiffener 81, and the frame fastening portion 66 of the right floor frame 38 is fastened to the bottom 43 and the stiffener 81 via the fastening bolt 58. Therefore, when the load F1 acting on the right floor frame 38 is transmitted to the central cross member 33 via the fastening bolt 58, the transmitted load F1 is more efficiently dispersed by the central cross member 33, and the central cross member 33 Can be suitably supported.
- the weld nut 45 of the first embodiment is welded to the outer surface (bottom outer surface) 43b of the bottom portion 43 of the central cross member 33.
- the structure of the second embodiment is the same as that of the vehicle body floor structure 10 of the first embodiment.
- the welding nut 45 is welded to the outer surface (bottom outer surface) 43 b of the bottom portion 43 of the central cross member 33 by welding, and is disposed coaxially with the mounting hole 44 of the bottom portion 43.
- the welding nut 45 can project downward from the bottom 43 (bottom outer surface 43 b).
- the welding nut 45 protruding from the bottom 43 is accommodated in the rear end 62 b of the frame bottom 62.
- the rear half portion 66 b of the frame fastening portion 66 abuts on the lower surface 45 a of the welding nut 45. In this state, the mounting hole 68 of the frame fastening portion 66 is disposed coaxially with the welding nut 45.
- the fastening bolt 58 is inserted into the mounting hole 68 of the frame fastening portion 66, and the screw portion 58 c of the fastening bolt 58 is screwed to the welding nut 45.
- the frame fastening portion 66 is attached to the bottom portion 43 of the central cross member 33 via the welding nut 45.
- the frame fastening portion 66 is disposed below and away from the bottom portion 43 of the central cross member 33.
- the upper side 71 d of the outer protrusion side wall 71 b of the linear bead 71 is in contact with the bottom portion 43 of the central cross member 33.
- the frame fastening portion 66 by separating the frame fastening portion 66 downward from the bottom portion 43 of the central cross member 33, the area of the closed cross-sectional area 92 formed by the rear end portion 62b of the frame bottom portion 62 and the bottom portion 43 of the central cross member 33 is implemented. Larger than Example 1 can be secured.
- the frame fastening portion 66 according to the first embodiment is superimposed on the bottom portion 43 of the central cross member 33.
- the rigidity of the closed cross-sectional area 92 can be increased. This prevents the rear end 38a of the right floor frame 38 from being deformed by the load F1 acting from the front end 38b (FIG. 1) of the right floor frame 38 toward the rear of the vehicle body. Can be transmitted more efficiently.
- the linear bead 71 is provided over the entire length of the right floor frame 38, and the panel bead 102 is provided on the rear floor panel 51.
- the structure of the second embodiment is the same as that of the vehicle body floor structure 10 of the first embodiment.
- the linear bead 71 is a reinforcing protrusion provided linearly in the entire length from the front end 38 b (FIG. 1) of the right floor frame 38 to the rear end 38 a. Therefore, the frame bottom portion 62 of the right floor frame 38 can be formed flat in the longitudinal direction of the vehicle body. Thereby, the rectification effect of the air which flows through frame bottom 62 of right floor frame 38 can be acquired.
- the load F1 acting on the front end 38b of the right floor frame 38 is framed by the linear bead 71. It can transmit to the fastening part 66 more efficiently.
- the panel bead 102 is a protrusion for reinforcement that protrudes downward at a portion of the rear floor panel 51 behind the vehicle body of the central cross member 33. That is, the panel bead 102 is integrally formed on the rear floor panel 51.
- the panel bead 102 is extended continuously from the rear end portion 71e of the linear bead 71 toward the rear of the vehicle body.
- a plurality of front cross members 31 (FIG. 1), a central cross member 33 and a rear cross member 35 are provided at predetermined intervals in the vehicle longitudinal direction. That is, the rear cross member 35 is provided behind the central cross member 33. Therefore, the panel bead 102 can be interposed between the rear end portion 71 e of the linear bead 71 and the rear cross member 35 by extending the panel bead 102 toward the rear of the vehicle body.
- the load F1 applied to the front end 38b (FIG. 1) of the right floor frame 38 is efficiently transmitted from the frame fastening portion 66 to the central cross member 33 through the fastening bolt 45, and the remaining load F2 is panel bead 102. Can be passed on to the cross member 35 afterward. Therefore, the load F1 applied to the front end portion 38b of the right floor frame 38 can be dispersed and more suitably supported by the two cross members (ie, the central cross member 33 and the rear cross member 35).
- the linear bead 71 is provided over the entire length of the right floor frame 38 and the panel bead 102 is provided on the rear floor panel 51.
- the present invention is not limited to this.
- the panel bead 102 may be removed from the rear floor panel 51, and the linear bead 71 may be provided only over the entire length of the right floor frame 38.
- the linear bead 71 of the first embodiment may be provided instead of the linear bead 71 of the fourth embodiment, and the panel bead 102 may be provided on the rear floor panel 51 in this state.
- Example 4 Although the example which formed the panel bead 102 in the back floor panel 51 integrally was demonstrated in Example 4, it is also possible to comprise the panel bead 102 and the back floor panel 51 by a separate member, without being limited to this. It is. In this case, the panel bead 102 is coupled to the rear floor panel 51 by spot welding or a fastening bolt.
- the degree of freedom in determining the shape of the panel bead 102 can be increased. Thereby, it is also possible to form the shape of the panel bead 102 so that the load F1 applied to the right floor frame 38 can be more efficiently transmitted to the rear of the vehicle body.
- the vehicle body floor structure 110 has the linear central bead 112 formed between the linear beads 71, and the other configuration is the same as that of the vehicle body floor structure 100 of the fourth embodiment. .
- the linear central bead 112 is a reinforcing projection which is formed between the linear beads 71 on the outer side in the vehicle width direction of the frame bottom portion 62 and extends toward the head 58 a of the fastening bolt 58. . Therefore, the rear end 112 a of the linear central bead 112 can be provided in the vicinity of the head 58 a of the fastening bolt 58.
- the vehicle body floor structure 120 has the frame fastening portion 122 formed at a portion 62e corresponding to the bottom portion 43 of the central cross member 33 in the rear end portion 62b of the frame bottom portion 62.
- the other configuration is the same as that of the vehicle body floor structure 10 of the first embodiment.
- the frame fastening portion 122 i.e., the recess
- the frame fastening portion 122 of the first embodiment is configured (FIG. 2). It can be kept smaller. Therefore, the concave portion of the rear end portion 62b of the frame bottom portion 62 can be suppressed to be small, and the rigidity of the right floor frame 38 can be enhanced. Thus, the load F1 acting from the front end 38b of the right floor frame 38 toward the rear of the vehicle body can be more efficiently transmitted to the central cross member 33 through the frame fastening portion 122 of the right floor frame 38.
- the vehicle body floor structure according to the present invention is not limited to the above-described embodiments, and may be modified or improved as appropriate.
- the example which formed the linear bead 71 in cross-sectional substantially trapezoidal shape was demonstrated in Example 1, forming in other shapes, such as cross-sectional substantially triangular shape and a cross-sectional substantially arc shape, is not restricted to this, either. It is possible.
- the fastening bolt 58 and the welding nut 45 are illustrated as the fastening means 57, but it is also possible to use other fastening means (fastening member) such as a clip without being limited thereto.
- the present invention is not limited thereto.
- the rear end 62b of the frame bottom 62 is connected to the bottom 43 of the central cross member 33, and the rear end of the outer wall 39 on the inner and outer sides in the vehicle width direction is fastened to the front wall 41 of the central cross member 33 It is also possible to connect with a bolt 58 or the like.
- the number of fastening bolts 58 is exemplified. Not limited to As another example, for example, it is also possible to align and fasten a plurality of fastening bolts 58 in the longitudinal direction of the vehicle body. By fastening the frame fastening portions 66 and 122 using a plurality of fastening bolts 58, the right floor frame 38 can be more favorably prevented from rotating about the fastening bolts 58.
- the shapes and configurations of the bead 71, the stiffener 81, the panel bead 102, the linear central bead 112, and the like are not limited to those illustrated, and may be modified as appropriate.
- the vehicle body floor structure of the present invention is suitable for application to a car in which the rear end of the floor frame is connected to the cross member and the floor frame and the floor panel form a closed cross-sectional area.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Claims (9)
- 車体フロア構造であって、
フロントサイドフレームと、
前記フロントサイドフレームの後端部から車体後方に向けて延出されたフロアフレームと、
前記フロアフレームの後端部が連結されたクロスメンバーと、
前記クロスメンバーに連結された前記フロアフレームが車幅方向内外側の側壁および底部で断面略U字状に形成され、断面略U字状の前記フロアフレームに載置されたフロアパネルと、
前記フロアパネルが前記フロアフレームに載置されることで、前記フロアフレームおよび前記フロアパネルで形成される閉断面部位と、
を具備しており、
前記フロアフレームは、
前記後端部のうち前記底部が前記クロスメンバーの底部に重ね合わされた状態で締結する締結部材と、
前記締結部材で締結されたフレーム締結部の車幅方向内外側において下方に向けて突出した線状ビードと、を含んでおり、
前記線状ビードが下方に向けて突出することにより、前記フレーム締結部は、前記線状ビードに対して凹んだ状態に形成されていることを特徴とする車体フロア構造。 - 前記線状ビードは、前記フロアフレームの稜線に沿って形成されていることを特徴とする請求項1に記載の車体フロア構造。
- 前記線状ビードは、前記締結部材の頭部よりも下方に突出する底部を有することを特徴とする請求項1に記載の車体フロア構造。
- 前記線状ビードは、前記フロアフレームの前端部から後端部まで全長に亘って設けられていることを特徴とする請求項1に記載の車体フロア構造。
- 前記フロアパネルは、前記クロスメンバーの車体後方の部位に下方へ向けて突出されたパネルビードを有し、前記パネルビードは、前記線状ビードの後端部から車体後方に向けて連続するように延出されていることを特徴とする請求項1に記載の車体フロア構造。
- 前記フロアパネルおよび前記クロスメンバーに前記フロアフレームが下方から重ね合わされることにより、前記クロスメンバーは、前記フロアフレームおよび前記フロアパネルで挟み込まれ、前記フロアフレームの前記車幅方向内外側の側壁は、前記フロアパネルにスポット溶接で結合され、前記フロアフレームの前記後端部のうち前記底部が前記クロスメンバーの底部に前記締結部材で締結されていることを特徴とする請求項1に記載の車体フロア構造。
- 前記締結部材はボルトであり、前記ボルトを締結するナットは、前記クロスメンバーの底部外面に設けられていることを特徴とする請求項1記載の車体フロア構造。
- 前記フロアフレームのうち前記線状ビード間において、前記締結部材の頭部に向けて延出する線状中央ビードが形成されていることを特徴とする請求項1に記載の車体フロア構造。
- 前記フレーム締結部は、前記クロスメンバーの底部に相当する部位に形成されたことを特徴とする請求項1に記載の車体フロア構造。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201180048816.6A CN103153763B (zh) | 2010-10-13 | 2011-09-13 | 车身底板构造 |
EP11832372.4A EP2628665B1 (en) | 2010-10-13 | 2011-09-13 | Vehicle body floor structure |
JP2012538609A JP5548778B2 (ja) | 2010-10-13 | 2011-09-13 | 車体フロア構造 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2010230989 | 2010-10-13 | ||
JP2010-230989 | 2010-10-13 |
Publications (1)
Publication Number | Publication Date |
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WO2012049933A1 true WO2012049933A1 (ja) | 2012-04-19 |
Family
ID=45938167
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2011/070860 WO2012049933A1 (ja) | 2010-10-13 | 2011-09-13 | 車体フロア構造 |
Country Status (4)
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EP (1) | EP2628665B1 (ja) |
JP (1) | JP5548778B2 (ja) |
CN (1) | CN103153763B (ja) |
WO (1) | WO2012049933A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3007374A3 (fr) * | 2013-06-24 | 2014-12-26 | Renault Sa | Partie de chassis a deux corps creux delimites par une piece de structure |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6757362B2 (ja) * | 2018-05-25 | 2020-09-16 | 本田技研工業株式会社 | 車体下部構造 |
JP2023150547A (ja) * | 2022-03-31 | 2023-10-16 | 本田技研工業株式会社 | アンカユニット付き車両構造 |
Citations (7)
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JP3467756B2 (ja) * | 1993-03-30 | 2003-11-17 | マツダ株式会社 | 自動車の下部構造 |
JP4581509B2 (ja) * | 2004-06-30 | 2010-11-17 | マツダ株式会社 | 車両の下部車体構造 |
JP4478654B2 (ja) * | 2006-02-13 | 2010-06-09 | 本田技研工業株式会社 | 車体フロア構造 |
JP4384206B2 (ja) * | 2007-06-28 | 2009-12-16 | 本田技研工業株式会社 | 自動車の車体構造 |
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- 2011-09-13 WO PCT/JP2011/070860 patent/WO2012049933A1/ja active Application Filing
- 2011-09-13 CN CN201180048816.6A patent/CN103153763B/zh not_active Expired - Fee Related
- 2011-09-13 EP EP11832372.4A patent/EP2628665B1/en not_active Not-in-force
- 2011-09-13 JP JP2012538609A patent/JP5548778B2/ja not_active Expired - Fee Related
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JPS6288660U (ja) * | 1985-11-26 | 1987-06-06 | ||
JPH0680987U (ja) * | 1993-04-27 | 1994-11-15 | カルソニック株式会社 | 排気管の継手構造 |
JPH10119826A (ja) * | 1996-10-22 | 1998-05-12 | Mitsubishi Motors Corp | フロアストリンガ構造 |
JP2006015770A (ja) * | 2004-06-30 | 2006-01-19 | Mazda Motor Corp | 車両の下部車体構造 |
JP2006096186A (ja) * | 2004-09-29 | 2006-04-13 | Mazda Motor Corp | 車体下部構造 |
JP2006321315A (ja) * | 2005-05-18 | 2006-11-30 | Honda Motor Co Ltd | 車両のフロア構造 |
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FR3007374A3 (fr) * | 2013-06-24 | 2014-12-26 | Renault Sa | Partie de chassis a deux corps creux delimites par une piece de structure |
Also Published As
Publication number | Publication date |
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EP2628665A4 (en) | 2014-10-08 |
CN103153763B (zh) | 2016-05-18 |
JP5548778B2 (ja) | 2014-07-16 |
EP2628665A1 (en) | 2013-08-21 |
CN103153763A (zh) | 2013-06-12 |
JPWO2012049933A1 (ja) | 2014-02-24 |
EP2628665B1 (en) | 2015-11-25 |
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