JP6596354B2 - Auto body structure - Google Patents

Description

  According to the present invention, a tunnel portion is formed in the center portion of the floor panel in the vehicle width direction so as to protrude upward and extend in the front-rear direction, and a floor frame extending in the front-rear direction is formed on the upper surface of the floor panel outside the tunnel portion in the vehicle width direction. The floor panel has a side wall and an upper wall at a position sandwiched between the floor frame and the tunnel portion, and is formed with a raised portion that is raised one step higher, and the floor panel is located above the raised portion along the lower end of the tunnel portion. The present invention relates to an automobile body structure in which a tunnel portion reinforcing frame extending in the front-rear direction is provided on a lower surface of a wall.

  A wire harness that connects the battery supported on the floor panel of the electric vehicle and the motor unit arranged in the front compartment is arranged inside the tunnel part extending in the front-rear direction at the center in the vehicle width direction of the floor panel. It is known from document 1.

  Further, an opening is formed in the front and rear surfaces of a cross member connected to the lower surface of the floor panel and extending in the vehicle width direction, and a fuel pipe is piped through the inside of a cylindrical guide member that penetrates these openings in the front and rear direction. It is known from Patent Document 2 below.

WO2014 / 167976 JP 2006-321315 A

  By the way, since the thing described in the said patent document 1 arrange | positions a wire harness inside a floor panel, in the case of the vehicle which arrange | positions a propeller shaft inside a floor panel, since a wire harness interferes with a propeller shaft. It is difficult to adopt.

  Moreover, since the thing described in the said patent document 2 forms an opening in a cross member and penetrates a guide member, there exists a possibility that the intensity | strength of the cross member which is a reinforcement member may fall by this opening.

  The present invention has been made in view of the above-described circumstances, and it is an object to enable linear members such as wire harnesses and fuel pipes to be guided from the lower surface of the floor panel to the engine room without reducing the rigidity of the vehicle body. And

  In order to achieve the above object, according to the invention described in claim 1, a tunnel portion is formed at the center portion of the floor panel in the vehicle width direction so as to rise upward and extend in the front-rear direction. A floor frame extending in the front-rear direction is provided on the upper surface of the floor panel on the outer side in the direction, and the floor panel has a side wall and an upper wall at a position sandwiched between the floor frame and the tunnel portion, and a raised portion that is raised one step higher And a vehicle body structure for a vehicle in which a tunnel portion reinforcing frame extending in the front-rear direction is provided on the lower surface of the upper wall of the raised portion along the lower end of the tunnel portion, and the front portion of the floor panel is a dashboard lower panel The lower surface of the tunnel portion reinforcing frame and the lower surface of the floor panel below the floor frame are connected by a connecting member at a portion connected to the lower portion of the floor portion, A linear member extending to the engine room in front of the dashboard lower panel is disposed in a space surrounded by the side wall of the raised portion, the upper wall of the raised portion, the tunnel portion reinforcing frame, and the connecting member. A vehicle body structure is proposed.

  According to the invention described in claim 2, in addition to the configuration of claim 1, the front portion of the floor frame is located at the front upper portion of the rear portion of the front side frame disposed in the front-rear direction in the engine room. And the connecting member has an L-shaped cross section in which a horizontal wall and a vertical wall are continuous with a ridge line in between, and a front portion of the connecting member is in front upper direction The automobile is bent and connected to the lower wall and the vehicle width direction inner wall of the rear portion of the front side frame, and the rear portion of the coupling member is connected to the lower wall and the vehicle width direction inner wall of the tunnel portion reinforcing frame. A vehicle body structure is proposed.

  According to the invention described in claim 3, in addition to the configuration of claim 2, a stiffener is disposed on the inner surface of the rear part of the front side frame, and the front part of the connecting member is the rear part of the front side frame and the front part frame. A vehicle body structure is proposed which is connected to a stiffener in a three-layered manner.

  According to the invention described in claim 4, in addition to the configuration of claim 2 or claim 3, the vertical wall of the rear part of the connecting member covers the front end of the tunnel part reinforcing frame and reinforces the tunnel part. A vehicle body structure is proposed which is connected to the inner wall of the frame in the vehicle width direction.

  According to the invention described in claim 5, in addition to the structure of any one of claims 1 to 4, the connecting member has a vertical wall rising height from the rear to the front. A vehicle body structure is proposed in which a flange that decreases toward the front and bends forward is formed at the upper end of the vertical wall.

  According to a sixth aspect of the present invention, in addition to the structure of any one of the first to fifth aspects, the vehicle body mounting portion and the connecting member at the rear portion of the subframe disposed in the engine room A vehicle body structure is proposed in which a stay is connected to the front part of the vehicle, and the rear part of the stay is connected to the connection member and the front side frame in a three-layered manner.

  According to the invention described in claim 7, in addition to the structure of claim 6, the stay includes a bead extending along a longitudinal direction of the stay, and a connection portion with the connecting member and the rear of the bead. An automobile body structure is proposed, which is characterized in that an opening is provided between the ends.

  The fuel pipe 31 of the embodiment corresponds to the linear member of the present invention.

  According to the configuration of the first aspect, the tunnel portion is formed in the center portion of the floor panel in the vehicle width direction so as to protrude upward and extend in the front-rear direction, and extends in the front-rear direction on the upper surface of the floor panel on the outer side in the vehicle width direction of the tunnel portion. A floor frame is provided, and the floor panel has a side wall and an upper wall at a position sandwiched between the floor frame and the tunnel portion to form a raised portion that is raised one step higher, and an upper wall of the raised portion along the lower end of the tunnel portion is formed. A tunnel portion reinforcing frame extending in the front-rear direction is provided on the lower surface.

  The front part of the floor panel is connected to the lower part of the dashboard lower panel, and the lower surface of the tunnel reinforcement frame is connected to the lower surface of the floor panel below the floor frame with a connecting member. A linear member that extends to the engine room in front of the dashboard lower panel is placed in the space surrounded by the wall, the tunnel reinforcement frame, and the connecting member. The degree can be increased.

  According to the configuration of claim 2, the front portion of the floor frame is connected to the rear portion of the front side frame disposed in the front-rear direction in the engine room with the dashboard lower panel inclined from the front upper side to the rear lower side. The The connecting member has an L-shaped cross section in which a horizontal wall and a vertical wall are continuous across a ridgeline, and the front part of the connecting member is bent forward and upward to connect to the lower wall of the rear part of the front side frame and the inner wall in the vehicle width direction. Since the rear part of the connecting member is connected to the lower wall of the tunnel reinforcement frame and the inner wall in the vehicle width direction, the collision load input from the front side frame is transmitted to the floor frame and absorbed. It can be transmitted from the side frame through the connecting member to the tunnel portion reinforcing frame and absorbed.

  According to the third aspect of the present invention, the stiffener is arranged on the inner surface of the rear part of the front side frame, and the front part of the connecting member is connected to the rear part of the front side frame and the stiffener in a three-layer manner. The strength of the connecting portion of the member can be increased to improve the collision load transmission performance.

  According to the fourth aspect of the present invention, the vertical wall at the rear part of the connecting member covers the front end of the tunnel part reinforcing frame and is connected to the inner wall in the vehicle width direction of the tunnel part reinforcing frame. The collision load can be transmitted not only to the tunnel portion reinforcing frame via the ridge line of the connecting member but also directly from the vertical wall of the connecting member to the front end of the tunnel portion reinforcing frame.

  According to the fifth aspect of the present invention, since the rising height of the vertical wall from the horizontal wall decreases from the rear to the front, a flange that bends forward is formed at the upper end of the vertical wall. In addition to securing the strength of the connecting member so that the position of the ridge line does not change in the vertical direction, not only can the space for arranging the linear member be secured, but the linear member is in contact with the flange bent forward and scratches It is prevented from sticking.

  According to the configuration of the sixth aspect of the present invention, the stay includes a stay for connecting the vehicle body mounting portion at the rear portion of the subframe disposed in the engine room and the front portion of the connecting member, and the rear portion of the stay is connected to the connecting member and the front side frame. Since they are connected in a stack, it is possible to improve the steering stability by increasing the rigidity of the body mounting portion of the subframe.

  According to the configuration of the seventh aspect, the stay includes the bead extending along the longitudinal direction thereof and the opening between the connection portion with the connecting member and the rear end of the bead. When the subframe is retracted by the load, the connecting member breaks at the fragile opening, so that the subframe is allowed to retract, and the impact energy absorption effect is enhanced.

The bottom view of the vehicle body front part of a motor vehicle. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. FIG. 3 is an enlarged perspective view of a part 3 in FIG. 2. FIG. 4 is a sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the present specification, the front-rear direction, the left-right direction (vehicle width direction), and the up-down direction are defined with reference to an occupant seated in a driver seat.

  As shown in FIGS. 1 to 4, the lower portion of the dashboard lower panel 13 rises forward and upward from the front end of the floor panel 12 sandwiched between a pair of left and right side sills 11, and an engine room 14 is partitioned in front of the floor. Is done. A tunnel section 15 having a trapezoidal cross section bulges upward so as to straddle the vehicle width direction center portion of the dashboard lower panel 13 from the vehicle width direction center portion of the floor panel 12. On the lower surface of the floor panel 12, a pair of left and right tunnel portion reinforcement frames 16 and 16 are disposed in the front-rear direction along both sides of the tunnel portion 15 in the vehicle width direction, and the left and right tunnel portion reinforcement frames on the upper surface of the floor panel 12 A pair of left and right floor frames 17, 17 are arranged in the front-rear direction on the outer side in the vehicle width direction of 16,16.

  The floor panel 12 has a pair of left and right raised portions 30 including side walls 30a, 30a and upper walls 30b, 30b from the portions connected to the floor frames 17, 17 toward the portions connected to the tunnel reinforcement frames 16, 16. 30 (see FIG. 4). Therefore, in the floor panel 12, the portion connected to the tunnel reinforcement frames 16, 16 is one step higher than the portion connected to the floor frames 17, 17.

  The rear portions of the pair of left and right front side frames 18 and 18 disposed in the front-rear direction in the engine room 14 are curved downward and downward while gradually decreasing the thickness in the vertical direction, and the front of the dashboard lower panel 14 is inclined forward and upward. Connected to. The front ends of the floor frames 17 and 17 that curve forward and upward are connected to the rear surface of the dashboard lower panel 14 that slopes forward and upward. The rear ends of the front side frames 18 and 18 and the front ends of the floor frames 17 and 17 are: Align in the front-rear direction across the dashboard lower panel 14.

  A square frame-shaped sub-frame 19 having an opening at the center is disposed in the engine room 14, and left and right rear portions thereof are bolts 21, 20 from below on brackets 20, 20 provided on the lower surfaces of the front side frames 18, 18. 21 is fastened. The rear lower surfaces of the left and right front side frames 18 and 18 and the front lower surfaces of the left and right tunnel portion reinforcing frames 16 and 16 are connected by a pair of left and right connecting members 22 and 22 whose rear side is inclined inward in the vehicle width direction. At the same time, the front ends of the connection frames 22 and 22 and the rear ends of the sub frames 19 are connected by a pair of left and right stays 23 and 23 extending in the front-rear direction.

  As shown in FIGS. 2 to 5, the connecting member 22 is a member obtained by pressing a metal plate. The connecting member 22 has a horizontal wall 22a extending in a substantially horizontal direction, and an end portion on the inner side in the vehicle width direction of the horizontal wall 22a via a ridge line 22e. A vertical wall 22b that rises upward, a flange 22c that is bent upward at the outer end in the vehicle width direction of the horizontal wall 22a, and a flange 22d that is bent forward at the upper end of the vertical wall 22b. The front end of the horizontal wall 22a is bent forward and upward along the lower surface of the front side frame 18, and the front and rear portions of the vertical wall 22b are bent in opposite directions along the front-rear direction. The standing height of the vertical wall 22b from the horizontal wall 22a gradually decreases toward the front of the connecting member 22 (toward the back side of the paper surface in FIG. 4).

  A stiffener 24 having a U-shaped cross section is disposed along the inner surface of the rear portion of the front side frame 18. The front portion of the horizontal wall 22a of the connecting member 22 is overlapped with the lower wall 18a and the stiffener 24 of the rear portion of the front side frame 18 and is fastened with bolts 25, and the vertical wall 22b of the connecting member 22 is also fastened. The front part is overlapped with the inner wall 18 b in the vehicle width direction and the stiffener 24 at the rear part of the front side frame 18 and is fastened together with bolts 26.

  Further, the rear portion of the horizontal wall 22a of the connecting member 22 is overlapped with the lower wall 16a of the front portion of the tunnel portion reinforcing frame 16 and fastened with a bolt 27, and the rear portion of the vertical wall 22b of the connecting member 22 is reinforced with the tunnel portion. It is overlapped with the inner wall 16 b in the vehicle width direction at the front portion of the frame 16 and fastened with a bolt 28.

  The stay 23 is a member formed by pressing a metal plate, and a bead 23c that protrudes downward along the longitudinal direction is formed at a portion sandwiched between the front and rear mounting portions 23a and 23b, and a rear mounting portion. An opening 23d is formed at the step between 23b and the rear end of bead 23c. Then, the mounting portion 23a on the front side of the stay 23 and the mounting portion 21a on the rear end of the sub frame 19 are fastened to the bracket 20 on the lower surface of the front side frame 18 by the bolt 21 (see FIG. 2), and the stay 23 The rear mounting portion 23b, the horizontal wall 22a of the connecting member 22, the lower wall 18a of the front side frame 18, and the stiffener 24 are fastened together by bolts 29 (see FIG. 2).

  As shown in FIGS. 3 and 4, the fuel pipe 31 extending from the fuel tank mounted at the rear of the vehicle body to the engine mounted in the engine room 14 includes the side wall 30 a of the raised portion 30 of the floor panel 12 and the raised portion 30. It arrange | positions so that the space enclosed by the upper wall 30b, the vehicle width direction outer wall 16c of the tunnel part reinforcement frame 16, and the flange 22d of the upper end of the vertical wall 22b of the connection member 22 may be passed.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  As apparent from FIGS. 3 and 4, the front portion of the floor panel 12 is connected to the lower portion of the dashboard lower panel 13, and the lower surface of the tunnel portion reinforcing frame 16 and the lower surface of the floor panel 12 below the floor frame 17 Are connected by a connecting member 22, the side wall 30 a and the upper wall 30 b of the raised portion 30 of the floor panel 12, the outer wall 16 c in the vehicle width direction of the tunnel portion reinforcing frame 16, and the flange 22 d of the vertical wall 22 b of the connecting member 22. Since the fuel pipe 31 extending from the fuel tank at the rear of the vehicle body to the engine room 14 in front of the dashboard lower panel 13 is arranged in the space surrounded by, the fuel pipe 31 can be connected without using the internal space of the tunnel portion 15. It is possible to easily secure the space for placement and increase the degree of freedom in design.

  At this time, since the rising height of the vertical wall 22b from the horizontal wall 22a decreases from the rear to the front (see FIG. 4), the connecting member 22 is connected so that the position of the ridge line 22e does not change in the vertical direction. A space for arranging the linear member 31 can be easily secured while securing the strength of the member 22. Moreover, since the connecting member 22 has a flange 22e bent forward at the upper end of the vertical wall 22b, the edge of the upper end of the vertical wall 22b is prevented from coming into direct contact with the connecting member 22, and the bent portion has a rounded flange 22e. It is possible to prevent the linear member 31 from being damaged.

  3 and 5, the connecting member 22 has an L-shaped cross section in which the horizontal wall 22a and the vertical wall 22b are continuous with the ridgeline 22e interposed therebetween, and the front portion of the connecting member 22 is bent forward and upward. Since the rear portion of the front side frame 18 is connected to the lower wall 18a and the inner wall 18b in the vehicle width direction, and the rear portion of the coupling member 22 is connected to the lower wall 16a and the inner wall 16b in the vehicle width direction of the front portion of the tunnel reinforcement frame 16. In addition to transmitting the collision load input from the front side frame 18 to the floor frame 17 and absorbing it, the collision load is transmitted from the front side frame 18 to the tunnel portion reinforcing frame 16 via the connecting member 22 and absorbed. Can do.

  Further, a stiffener 24 for reinforcement is disposed on the inner surface of the rear part of the front side frame 18, and the lower wall 22 a of the front part of the connecting member 22 is overlapped with the lower wall 18 a of the rear part of the front side frame 18 and the stiffener 24. Since it is fastened with the bolts 25, the strength of the connecting portion between the front side frame 18 and the connecting member 22 can be increased and the transmission performance of the collision load can be improved.

  Moreover, the vertical wall 22b at the rear part of the connecting member 22 extending in the oblique direction covers the front end of the tunnel part reinforcing frame 16 and is fastened to the inner wall 16b in the vehicle width direction of the tunnel part reinforcing frame 16 with bolts 28. The collision load input from 18 can be transmitted not only to the tunnel portion reinforcing frame 16 via the ridge line 22 a of the connecting member 22 but also directly from the vertical wall 22 b of the connecting member 22 to the front end of the tunnel portion reinforcing frame 16.

  As is clear from FIGS. 2 and 3, the engine room 14 is provided with a sub-frame 19 that supports the engine, transmission, suspension device, and the like. The front part is connected by a stay 23, but the rear part of the stay 23 is overlapped on the horizontal wall 22 of the connecting member 22 and the lower wall 18a of the front side frame 18 in a three-layered manner, and a stiffener 24 is further added to add 4 Since the bolts 29 are fastened in a state of being overlapped with each other, the collision load transmitted to the subframe 19 can be efficiently transmitted to the front side frame 16 and the floor frame 17 via the stay 23. Thereby, the attachment rigidity of the sub-frame 19 that supports the suspension device can be increased, and the steering stability of the vehicle can be improved.

  Moreover, the stay 23 includes a bead 23c extending along the longitudinal direction, and an opening 23d between the fastening portion with the connecting member 22 and the rear end of the bead 23c. When the connection member 22 is retracted, the connecting member 22 is broken at the fragile opening 23d, so that the subframe 19 is allowed to retract and the impact energy absorption effect is enhanced. At this time, since the rear end of the bead 23c of the stay 23 is located below the head of the bolt 29 with the opening 23d interposed therebetween (see FIG. 2), when the subframe 19 moves backward due to the collision load of the frontal collision. Since the rear end of the bead 23c passes the head of the bolt 29, the break of the stay 23 at the opening 23d can be promoted.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, the linear member of the present invention is not limited to the fuel pipe 31 of the embodiment, and may be another linear member such as a wire harness.

12 floor panel 13 dashboard lower panel 14 engine room 15 tunnel portion 16 tunnel portion reinforcing frame 16a lower wall 16b inner wall 17 in the vehicle width direction floor frame 18 front side frame 18a lower wall 18b inner wall 19 in the vehicle width direction sub-frame 22 connecting member 22a horizontal wall 22b Vertical wall 22d Flange 22e Edge 23 Stay 23c Bead 23d Opening 24 Stiffener 30 Raised part 30a Side wall 30b Upper wall 31 Fuel piping (linear member)

Claims (7)

  A tunnel portion (15) that protrudes upward and extends in the front-rear direction is formed at the vehicle width direction center portion of the floor panel (12), and the upper surface of the floor panel (12) outside the tunnel portion (15) in the vehicle width direction. A floor frame (17) extending in the front-rear direction is provided, and the floor panel (12) is disposed between the floor frame (17) and the tunnel portion (15) at a side wall (30a) and an upper wall (30b). And a ridge (30) that is raised one step higher, and extends in the front-rear direction on the lower surface of the upper wall (30b) of the ridge (30) along the lower end of the tunnel (15). The vehicle body structure of an automobile provided with (16), wherein the front part of the floor panel (12) is connected to the lower part of the dashboard lower panel (13), and the tunnel part reinforcement The lower surface of the frame (16) and the lower surface of the floor panel (12) below the floor frame (17) are connected by a connecting member (22), and the side wall (30a) of the raised portion (30) and the raised portion ( 30) A line extending to the engine room (14) in front of the dashboard lower panel (13) in a space surrounded by the upper wall (30b), the tunnel portion reinforcing frame (16), and the connecting member (22). A vehicle body structure characterized by disposing a member (31).   The front portion of the floor frame (17) is arranged at the rear portion of the front side frame (18) disposed in the front-rear direction in the engine room (14), and the dashboard lower panel (13) is inclined from the front upper side to the rear lower side. The connecting member (22) has an L-shaped cross section in which the horizontal wall (22a) and the vertical wall (22b) are continuous with the ridge line (22e) in between, and the front of the connecting member (22). The portion is bent forward and upward and connected to the lower wall (18a) of the rear portion of the front side frame (18) and the inner wall (18b) in the vehicle width direction, and the rear portion of the connecting member (22) is connected to the tunnel portion reinforcing frame ( 16. The vehicle body structure according to claim 1, wherein the vehicle body structure is connected to a lower wall (16a) and an inner wall (16b) in the vehicle width direction.   A stiffener (24) is disposed on the inner surface of the rear part of the front side frame (18), and the front part of the connecting member (22) is connected to the rear part of the front side frame (18) and the stiffener (24) in a stacked manner. The vehicle body structure according to claim 2, wherein the vehicle body structure is a vehicle body structure.   The vertical wall (22b) at the rear part of the connecting member (22) covers the front end of the tunnel part reinforcing frame (16) and is connected to the inner wall (16b) in the vehicle width direction of the tunnel part reinforcing frame (16). The vehicle body structure according to claim 2, wherein the vehicle body structure is a vehicle body structure.   The connecting member (22) has a flange (a height of the vertical wall (22b) rising from the horizontal wall (22a) decreases from the rear to the front and bends forward at the upper end of the vertical wall (22b) ( The vehicle body structure according to any one of claims 1 to 4, wherein 22d) is formed.   A stay (23) is provided for connecting a vehicle body mounting portion at the rear portion of the subframe (19) disposed in the engine room (14) and a front portion of the connecting member (22), and the rear portion of the stay (23) is The vehicle body structure according to any one of claims 1 to 5, wherein the vehicle body structure is connected to the connecting member (22) and the front side frame (18) in a stacked manner. The stay (23) includes a bead (23c) extending along a longitudinal direction of the stay (23), and an opening (23d) between a connection portion with the coupling member (22) and a rear end of the bead (23c). The vehicle body structure according to claim 6, further comprising:

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