JP6234266B2 - Floor cross member reinforcement structure - Google Patents

Description

  The present invention relates to a reinforcing structure for a floor cross member that is disposed on the left and right sides of a floor tunnel in the center longitudinal direction of a vehicle and to which seat legs are attached.

  In general, a floor leg member arranged on the left and right across a floor tunnel in the center front-rear direction of the vehicle has a structure in which a seat leg or a seat rail is attached, and a load is applied to the seat attachment portion at the time of a vehicle frontal collision. Therefore, conventionally, measures to reinforce the seat mounting portion have been taken.

  Specifically, for example, as described in Patent Document 1, the seat rail is attached to the cross members disposed on the left and right of the tunnel portion protruding upward in the center front-rear direction of the floor panel via a plurality of brackets, Further, a structure has been proposed in which seat anchor reinforcement is provided for reinforcement to realize anchor reinforcement.

Japanese Patent Laying-Open No. 2008-12934 (see paragraphs 0017-0024 and FIGS. 1 and 2)

  However, in the case of the conventional structure described in Patent Document 1 described above, since each bracket is used only for anchor reinforcement, it is necessary to prepare various brackets exclusively for anchor reinforcement, and the structure becomes complicated. There is a problem of increasing the weight and cost.

  It is an object of the present invention to reinforce a floor cross member to which a seat leg is attached by utilizing an existing reinforcing member.

In order to achieve the above object, the floor cross member reinforcing structure of the present invention is the floor cross member reinforcing structure in which the seat legs are attached to the left and right sides of the floor tunnel in the center longitudinal direction of the vehicle. A tunnel reinforcement disposed so as to cover the upper surface of a floor tunnel, a flange provided on an edge of each of the floor cross members facing the floor tunnel, and a rear end of the tunnel reinforcement A tunnel gusset that is attached to the vertical wall-shaped seat riser and is welded to the tunnel reinforcement, and the floor tunnel, the flanges of the two floor cross members, and the tunnel reinforcement are sequentially stacked and welded. The tunnel gusset is in the vicinity of the welding point. Is location is characterized in that it is welded to the tunnel reinforcement (claim 1).

According to the first aspect of the present invention, the tunnel reinforcement covering the upper surface of the floor tunnel is normally used for reinforcing the floor tunnel, and the floor tunnel, the flanges of both floor cross members, and the tunnel reinforcement By overlapping and welding, the load applied to both floor cross members via the seat legs at the time of a vehicle collision can be distributed to the existing tunnel reinforcement, and the existing reinforcing member can be used without using a dedicated reinforcing member. By utilizing the tunnel reinforcement, it is possible to reinforce the floor cross member to which the seat leg is attached while preventing an increase in the weight and cost of the vehicle. Moreover, since the tunnel gusset is welded to the tunnel reinforcement and attached to the seat riser, the floor tunnel can be reinforced.

It is a perspective view of one embodiment of the reinforcement structure of the floor cross member concerning the present invention. FIG. 2 is a partial cutaway front view of FIG. 1. FIG. 2 is a side view of a different part of FIG. 1. FIG. 4 is a partial perspective view of FIG. 3.

  An embodiment of the present invention will be described in detail with reference to FIGS.

  As shown in FIGS. 1 and 2, a floor tunnel 2 having a U-shaped cross section protrudes upward at the center of the passenger compartment floor 1 and is formed in the front-rear direction of the vehicle. A vertical wall-shaped seat riser 3 is formed, and a tunnel reinforcement 4 having a U-shaped cross section is disposed so as to cover the upper surface from the front end to the rear end of the floor tunnel 2 and is welded to the floor tunnel 2. Reinforcing vertical members 5a and 5b having a U-shaped cross-section in the front-rear direction are disposed on the lower surface side of the floor 1 and on the left and right rising portions of the floor tunnel 2 from the floor 1, and above the vertical members 5a and 5b, respectively. Inner flanges 6a and 6b formed extending in the direction of the floor tunnel 2 are arranged along the left and right side surfaces of the floor tunnel 2 and welded to the floor tunnel 2, and are formed on the vertical members 5a and 5b, respectively. 1 of the lower surface disposed along an outer flange 7a, 7b are welded to the floor 1, floor tunnel 2 is reinforced.

  Further, as shown in FIG. 1, a tunnel gusset 10 having an outer shape obtained by cutting a rectangular parallelepiped into an oblique half is disposed at the rear end portion of the floor tunnel 2, and the front end of the tunnel gusset 10 covering the tunnel reinforcement 4 from above. The U-shaped portion 10a formed on the portion and its flanges 10a1, 10a2 are welded to the tunnel reinforcement 4, and the flanges 10b, 10c, 10d formed on the periphery of the rear end of the tunnel gusset 10 are attached to the seat riser 3. The floor tunnel 2 is further reinforced with bolts.

  As shown in FIGS. 1 and 2, floor cross members 12a, 12b having a hat-shaped cross section are disposed on the left and right sides of the floor tunnel 2, and the front and rear flanges 13a1, 13a2 and the right side of the left floor cross member 12a Similarly, the front and rear flanges of the floor cross member 12b are welded to the floor tunnel 2 to reinforce the floor tunnel 2.

  Here, as shown in FIG. 2, on both floor cross members 12a and 12b, seat legs 17a and 17b to which seat rails 15a and 15b of left and right seats are fastened by bolts 16a and 16b are bolts and nuts 18a, It is attached by 18b.

  By the way, as shown in FIG. 1 and FIG. 2, upper flanges 20a and 20b are further formed on the upper edge of each of the floor cross members 12a and 12b facing the floor tunnel 2, and the floor tunnel 2 and both floor cross members 12a and 12b are formed. Three members of the upper flanges 20a and 20b of the 12b and the tunnel reinforcement 4 are sequentially stacked and welded together (indicated by crosses in FIGS. 1 and 2), and the seat legs 17a and 17b at the time of a frontal collision of the vehicle. Thus, the load applied to both floor cross members 12a and 12b through the like is effectively distributed to the tunnel reinforcement provided for reinforcing the floor tunnel 2.

  Further, as shown in FIG. 3, the rear ends of the vertical members 5 a and 5 b described above are blocked by the partition member 22. As shown in FIG. 4, the partition member 22 has flanges 22a, 22b, 22c, and 22d in the same direction on the entire periphery, and the left and right and lower flanges 22a, 22b, and 22c are the vertical members 5a and 5b. Are welded to the inner surfaces of the left and right wall surfaces and the lower wall surface, and the upper flange 22d is welded to the lower surface of the floor 1 (indicated by crosses in FIGS. 3 and 4), thereby further reinforcing the floor tunnel 2. ing.

  Therefore, according to the above-described embodiment, the tunnel reinforcement 4 that covers the upper surface of the floor tunnel 2 is normally used for reinforcing the floor tunnel 2, and each of the floor tunnel 2 and both floor cross members 12a and 12b is used. The upper flanges 20a, 20b and the tunnel reinforcement 4 are overlapped and welded so that the load applied to both floor cross members 12a, 12b via the seat legs 17a, 17b at the time of a vehicle collision is transferred to the existing tunnel reinforcement 4 The seat leg can be dispersed while preventing the increase in weight and cost of the vehicle by utilizing the tunnel reinforcement 4 which is an existing reinforcing member without using a dedicated reinforcing member as in the prior art. Floor cross member 12a to which 17a, 17b is attached 2b can be reinforced.

  Further, since the tunnel gusset 10 is welded to the tunnel reinforcement 4 and bolted to the seat riser 3, the floor tunnel 2 can be further reinforced. Furthermore, since the partition member 22 is welded to the rear ends of the vertical members 5a and 5b and the floor 1, the floor tunnel 2 can be further reinforced.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the case where the reinforcement of the floor tunnel 2 is further strengthened by the tunnel gusset 10 and the partition members 22 at the rear ends of the vertical members 5a and 5b has been described. It goes without saying that either or both may be omitted.

2 ... Floor tunnel 4 ... Tunnel reinforcement 12a, 12b ... Floor cross member 20a, 20b ... Upper flange

Claims (1)

In the reinforcement structure of the floor cross member that is disposed on the left and right across the floor tunnel in the center front-rear direction of the vehicle and the seat leg is attached,
A tunnel reinforcement arranged to cover the upper surface of the floor tunnel;
A flange provided at an edge of each of the floor cross members facing the floor tunnel ;
A tunnel gusset attached to a vertical wall-like sheet riser formed at the rear end of the tunnel reinforcement and welded to the tunnel reinforcement .
The floor tunnel, the flanges of both floor cross members and the tunnel reinforcement are sequentially stacked and welded ,
A reinforcing structure of a floor cross member , wherein the tunnel gusset is disposed in the vicinity of the welding location and welded to the tunnel reinforcement.

Images