JP6040906B2 - Vehicle floor structure - Google Patents

Description

  The present invention is provided with pillars standing on both sides in the vehicle width direction at the position of the passenger compartment, a cross member extending in the vehicle width direction between the left and right pillars, and between the cross member and the pillar, The present invention relates to a vehicle floor structure including left and right gussets that support the left and right pillars from the vehicle interior side.

A conventional vehicle floor structure related to this is described in Patent Document 1.
As shown in FIG. 10, the vehicle floor structure has a vehicle floor between a center pillar 112 having a lower end supported by rocker rails 110 extending in the vehicle front-rear direction on both sides in the vehicle width direction, and the left and right center pillars 112. A cross member 114 that extends in the vehicle width direction, and left and right gussets 115 that are provided between the cross member 114 and the center pillar 112 and support the left and right center pillars 112 from the vehicle interior side are provided.
The gusset 115 is firmly fixed between the cross member 114 and the center pillar 112 by welding so as to cope with a side collision. Here, spot welding is generally used for welding, but when the structure of the gusset 115 is complicated, a portion where spot welding is difficult occurs. In this case, the gusset 115 is fixed manually by arc welding.

JP 2008-12996 A

  However, when the gusset 115 is fixed by arc welding, the gusset 115 cannot be fixed by a flow operation in a factory assembly line. For this reason, the gusset 115 is welded manually at a place off the factory assembly line. That is, a dedicated process is required, which is disadvantageous in cost.

  The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is that the gusset can be fixed between the cross member and the pillar in the factory flow operation, and this It is to prevent the load transmission efficiency at the time of vehicle side collision from being lowered by the fixed structure.

The above-described problems are solved by the inventions of the claims.
According to the first aspect of the present invention, there are provided pillars standing on both sides in the vehicle width direction at the position of the passenger compartment, a cross member extending in the vehicle width direction between the left and right pillars, and between the cross member and the pillar. A floor structure of a vehicle provided with left and right gussets for supporting the left and right pillars from a vehicle interior side, wherein the gusset is set between the cross member and the pillar between the gusset and the cross member. The gusset and the cross member are provided with load transmission surfaces facing each other through the gap in the vehicle width direction, and the gusset is connected to the connecting member and the connected member. A coupling mechanism that is coupled to the pillar and the cross member using a coupling mechanism composed of members, and the coupling mechanism that couples the gusset and the cross member is at least The gusset and the cross member are connected to each other in a state in which relative movement in the vehicle width direction is allowed by the size of the gap.

According to the present invention, since a gap is formed between the gusset and the cross member, the gusset can be set between the cross member and the pillar in a subsequent process. Further, the gusset is connected to the pillar and the cross member using a connecting mechanism including a connecting member and a connected member, for example, a bolt, a nut and the like. For this reason, the gusset can be set between the cross member and the pillar and connected to the pillar and the cross member in a factory flow operation.
Further, the coupling mechanism that couples the gusset and the cross member couples the gusset and the cross member in a state in which relative movement between the gusset and the cross member is allowed in the vehicle width direction. For this reason, for example, when a side collision load is applied to the vehicle, an excessive force is not applied to the connection mechanism, and the connection mechanism can be prevented from being damaged. And since the gusset and the cross member relatively move in the vehicle width direction in a state where the coupling mechanism is functioning, the load transmission surface of the gusset and the load transmission surface of the cross member come into contact with each other reliably.
Accordingly, the side collision load is reliably transmitted to the cross member via the pillar and the gusset. Thereby, even if a gap is formed between the gusset and the cross member, the load transmission efficiency at the time of a side collision does not decrease.

According to the invention of claim 2, the connecting mechanism for connecting the gusset and the cross member is provided in the bolt hole provided in one of the gusset and the cross member, and in the other of the gusset and the cross member. And a long hole in the vehicle width direction, a bolt passed through the long hole and the bolt hole, and a nut screwed into the bolt.
For this reason, the configuration of the coupling mechanism is simple and reliable.

According to the invention of claim 3, the end portion of the gusset covers the end portion of the cross member from the three sides of the front surface side, the upper surface side, and the rear surface side. It is the structure which connects a cross member.
As described above, since the connecting mechanism is provided in the portion that is easy to see and work, the working efficiency of the connecting work between the gusset and the cross member is improved.

According to the invention of claim 4, the gusset is composed of a gusset inner member fixed to the cross member, and a gusset outer member that covers the gusset inner member from three sides of the front side, the upper side, and the rear side, The load transmission surface is provided on the gusset inner member, and the cross member is connected to the cross member by the coupling mechanism in a state in which the gusset outer member covers the end of the cross member from the front side, the upper side, and the rear side. It is comprised so that it may be connected with the edge part of this.
In this way, the gusset outer member of the gusset covers the gusset inner member and the end of the cross member from the three sides of the front side, the upper side, and the rear side. Guided by the gusset outer member, the load transmission surface of the gusset inner member is surely brought into contact with the load transmission surface of the cross member.

According to the invention of claim 5, the gusset inner member is formed in a substantially inverted U-shaped cross section by the front plate portion, the ceiling plate portion, and the rear plate portion, and a lid-like bulk is formed at the end of the gusset inner member. It is covered and the load transmission surface is formed.
Thus, since the bulk provided with the load transmission surface and the gusset inner member are separate members, the configuration of the gusset inner member can be simplified.

  According to the present invention, it becomes possible to fix the gusset between the cross member and the pillar in a factory flow operation. Moreover, the load transmission efficiency at the time of a vehicle side collision is not reduced by this fixing structure.

1 is an overall schematic plan view (A diagram) of a vehicle including a floor structure according to Embodiment 1 of the present invention, and FIG. It is a disassembled perspective view of the center pillar of a vehicle. It is a disassembled perspective view showing the floor part structure of a vehicle. It is a disassembled perspective view of a cross member. It is a disassembled perspective view of a gusset. It is a whole perspective view of a gusset. It is a longitudinal cross-sectional view showing the positional relationship of a gusset, a center pillar, and a cross member. FIG. 8 is a sectional view (plan sectional view) taken along the line VIII-VIII in FIG. 7. It is IX-IX arrow sectional drawing (longitudinal sectional view) of FIG. It is a side view showing the floor part structure of the conventional vehicle.

[Embodiment 1]
Hereinafter, the vehicle floor structure according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 9.
The floor structure of the vehicle according to the present embodiment is a floor structure at the center of the passenger compartment of a sedan type passenger car.
Here, front and rear, left and right and up and down in the figure correspond to front and rear, left and right and up and down of the passenger car.

<About the basic structure of the passenger car C>
Before describing the details of the floor structure in the passenger car C, the basic structure outline of the passenger car C will be described.
As shown in FIG. 1A, on the floor F of the passenger compartment of the passenger car C, the rocker rails 10 constituting the frame of the passenger car C extend in the vehicle front-rear direction at both side positions (left and right ends) in the vehicle width direction. Is provided. A center pillar 20 is erected at a rear position of the door opening DK of the passenger compartment, and a lower end portion of the center pillar 20 is connected to the rocker rail 10. As shown in FIGS. 1A and 1B, the outside of the center pillar 20 is covered with a body side panel 15 that constitutes the outer design surface of the passenger car C. Then, as shown in FIG. 1 (B), the side door Dr is accommodated in the recess 15k of the body side panel 15 located at the periphery of the door opening DK of the passenger compartment.
As shown in FIG. 1A, a cross member 30 extending in the vehicle width direction is provided between the left and right center pillars 20, and the cross member 30 and the left and right center pillars 20 are provided. Left and right gussets 40 are provided between the center pillars 20 to support the center pillars 20 from the vehicle interior side.
Here, since the left and right center pillars 20 and the left and right gussets 40 are symmetrical and have the same configuration, the right center pillar 20 and the gusset 40 will be described below as a representative.

<About center pillar 20>
The center pillar 20 includes an inner pillar 23 and a pillar reinforcement 25, as shown in FIGS. A flange portion 23 f is formed on each of the front end edge and the rear end edge of the inner pillar 23. Further, the flange portion 25 f is also formed on the front end edge and the rear end edge of the pillar reinforcement 25. The center pillar 20 is formed in a cylindrical shape by joining the flange 23f of the inner pillar 23 and the flange 25f of the pillar reinforcement 25 and welding them together. Further, as shown in FIG. 1 (B), the flange portions 15f formed on the edge of the recess portion 15k of the body side panel 15 are aligned with the front flange portions 23f and 25f of the center pillar 20 by welding. Fixed.
A gusset 40 (described later) is coupled to the side wall surface 23w of the lower end portion of the inner pillar 23 in the center pillar 20 as shown in FIGS. Further, as shown in FIG. 1B and FIG. 2, the second bulk 24 for absorbing shock is fixed to the back side surface 23 r of the inner pillar 23 at a position on the extension line of the gusset 40. Further, the first bulk 27 for absorbing shock is fixed to the outer wall surface 25 w of the pillar reinforcement 25 at a position on the extension line of the gusset 40 and the second bulk 24.

<About the cross member 30>
The cross member 30 is a frame that extends in the vehicle width direction at the center of the vehicle compartment and reinforces the floor F of the vehicle compartment. As shown in FIGS. 3 and 4, the cross member 30 includes a base member 32, an inner member 34, and an outer member 35. As shown in FIGS. 4 and 9 (cross-sectional views), the base member 32 is formed into a substantially inverted L-shaped cross section by a front plate portion 32f and a ceiling plate portion 32u, and a floor portion F (FIG. 9) of the passenger compartment. The sheet support portion front surface Ff and the upper surface Fu of the sheet support portion are fixed to the floor portion F in a state of covering the corner portions.
As shown in FIGS. 4 and 9, the inner member 34 is formed in a narrow box shape having a substantially inverted U-shaped cross section by a front plate portion 34f, a ceiling plate portion 34u, and a rear plate portion 34b. The lower end edge of the plate portion 34f is fixed to the upper portion of the front plate portion 32f of the base member 32 by welding or the like. A flange portion 34x is bent at the lower edge of the rear plate portion 34b of the inner member 34, and the flange portion 34x is fixed to the ceiling plate portion 32u of the base member 32 by welding or the like as shown in FIG. ing.

At the right end of the inner member 34, as shown in FIG. 4, two bolt holes 342 are formed in a predetermined position of the front plate portion 34f and aligned in the vehicle width direction, and at a predetermined position of the ceiling plate portion 34u. One bolt hole 344 is formed. Similarly, two bolt holes 342 and 344 are formed in the left end portion of the inner member 34 in the front plate portion 34f and in the ceiling plate portion 34u. The bolt holes 342 and 344 are holes used to fix the gusset outer members 47 (described later) of the left and right gussets 40 with bolts B. As shown in FIGS. 8 and 9, nuts N into which bolts B are screwed into the positions of the respective bolt holes 342 and 344 are welded inside the inner member 34 (the front plate portion 34f and the ceiling plate portion 34u). It is fixed by etc. The nut N at the position of the bolt hole 344 is not shown.
Further, as shown in the plan sectional view of FIG. 8, the left and right end portions of the inner member 34 are opened by bending the end portion of the front plate portion 34f and the end portion of the rear plate portion 34b at right angles. Is closed to form a load transmission surface 34p.
The outer member 35 is a member that covers and reinforces the inner member 34 from the outside. As shown in FIGS. 4 and 9, the front member 35f, the ceiling member 35u, and the rear member 35b are substantially U-shaped in cross section. It is formed in a narrow box shape. The bolt holes 352 and 354 for fastening the gusset outer members 47 of the left and right gussets 40 to the front plate portion 35f and the ceiling plate portion 35u of the outer member 35 are bolted to the bolt holes 342 and 344 of the inner member 34, respectively. Each is formed to overlap.
The outer member 35 is fixed to the inner member 34 by welding or the like in a state where the outer member 35 is covered with the inner member 34.

<About gusset 40>
The gusset 40 is a member for supporting the center pillar 20 from the vehicle interior side and transmitting a collision load at the time of a vehicle side collision to the cross member 30. The gusset 40 includes a gusset inner member 43 and a gusset outer member 47 as shown in FIGS.
As shown in FIG. 5, the gusset inner member 43 is formed in a narrow box shape having a substantially inverted U-shaped cross section by a front plate portion 43f, a ceiling plate portion 43u, and a rear plate portion 43b. As shown in FIG. 7, the gusset inner member 43 is set between the center pillar 20 and the cross member 30 so that the ceiling plate portion 43u is horizontal. Here, the length dimension of the gusset inner member 43 in the vehicle width direction is set smaller than the distance from the side wall surface 23w of the center pillar 20 to the load transmission surface 34p of the cross member 30 as shown in FIG. .
As shown in FIG. 5 and the like, the front plate portion 43f of the gusset inner member 43 has a small height dimension from the position of the ceiling plate portion 43u (upper end position) to the lower end position on the center pillar 20 side, and on the cross member 30 side. It is formed to be large. On the other hand, the rear plate portion 43b of the gusset inner member 43 has substantially the same height dimension in the vehicle width direction, and is set to a value substantially equal to the height dimension of the front plate portion 43f on the center pillar 20 side.

As shown in FIG. 5, the front plate portion 43 f of the gusset inner member 43 is provided with a flange portion 430 at the lower end position on the cross member 30 side, and two bolt holes 432 are formed in the flange portion 430. ing. The bolt hole 432 of the flange portion 430 of the front plate portion 43f is configured to be bolted to the base member 32 of the cross member 30 in alignment with the bolt hole 323 of the base member 32 of the cross member 30 shown in FIG. ing. Here, the bolt hole 432 of the front plate portion 43f of the gusset inner member 43 is formed to have a sufficiently large diameter with respect to the bolt, and the base of the cross member 30 when the gusset inner member 43 receives a side collision load. The member 32 is configured to be movable by a difference in diameter between the bolt hole 432 and the bolt.
Further, at the end of the gusset inner member 43 on the cross member 30 side, as shown in FIG. 5, a lid-like bulk 45 (hereinafter referred to as a lid-like bulk 45) so as to close the end opening of the gusset inner member 43. Is fixed by welding or the like.

The lid-like bulk 45 is a member for transmitting a side collision load applied to the gusset inner member 43 to the load transmission surface 34p of the inner member 34 of the cross member 30. The lid-shaped bulk 45 is closed at a right angle with respect to the bulk main body 45p, closing the end opening of the gusset inner member 43, and the front plate 43f, the ceiling plate 43u of the gusset inner member 43, And flange portions 45f, 45u, and 45b welded to the rear plate portion 43b, respectively. And the bulk main-body part 45p of the lid-like bulk 45 is formed in the shape substantially equal to the load transmission surface 34p of the cross member 30 (inner member 34).
The length in the vehicle width direction of the gusset inner member 43 and the like in a state where the lid-like bulk 45 is fixed to the gusset inner member 43 is the load of the cross member 30 from the side wall surface 23w of the center pillar 20 as shown in FIG. The distance is set smaller than the distance to the transmission surface 34p. Therefore, in a state where the gusset inner member 43 and the like are set between the center pillar 20 and the cross member 30, the bulk main body 45p such as the gusset inner member 43 and the load transmission surface 34p of the cross member 30 (inner member 34) are connected. Oppositely, a gap T is formed between both 45p and 34p.
That is, the bulk main body 45p such as the gusset inner member 43 corresponds to the load transmission surface of the gusset inner member of the present invention.

The upper part of the gusset inner member 43 and the lid-like bulk 45 are covered with a gusset outer member 47 as shown in FIG.
As shown in FIG. 7, the gusset outer member 47 is a member that is slanted between the center pillar 20 and the cross member 30 so that the center pillar 20 side is raised, and prevents the center pillar 20 from falling. . As shown in FIG. 5, the gusset outer member 47 is formed in a narrow box shape having a substantially inverted U-shaped cross section by a front plate portion 47f, a ceiling plate portion 47u, and a rear plate portion 47b. The length dimension in the vehicle width direction is set larger than 43. The gusset outer member 47 has an upper end (right end) on the center pillar 20 side aligned with the right end of the gusset inner member 43, as shown in FIG. It covers the lid-like bulk 45 and is fixed to the gusset inner member 43 by welding or the like (see symbol Y in FIG. 6). As a result, the left end portion (cross member 30 side end portion) of the gusset outer member 47 protrudes to the left by a certain dimension with respect to the lid-like bulk 45 of the gusset inner member 43. The left end portion (cross-member 30 side end portion) of the gusset outer member 47 is put on the outer member 35 of the cross member 30 as shown in FIGS.

As shown in FIG. 6 and the like, the front plate portion 35f, 34f of the cross member 30 (outer member 35, inner member 34) is provided on the front plate portion 47f of the left end portion (end portion on the cross member 30 side) of the gusset outer member 47. Two elongated holes 472 are formed at positions corresponding to the bolt holes 352 and 342. In addition, a long hole 474 is formed at a position corresponding to the bolt holes 354 and 344 of the ceiling plate portions 35u and 34u of the outer member 35 and the inner member 34 in the ceiling plate portion 47u at the left end portion of the gusset outer member 47. Yes.
As shown in FIGS. 6 and 7, the long holes 472 and 474 of the gusset outer member 47 are formed long in the vehicle width direction, and the length dimension of these long holes 472 and 474 is the long holes 472 and 474. Is set to be larger by a predetermined dimension R than the diameter dimension of the bolt B passed through. For this reason, the gusset outer member 47 is fixed in the vehicle width direction by a predetermined dimension R with respect to the cross member 30 in a state where the gusset outer member 47 is bolted to the cross member 30 using the elongated holes 472 and 474. It becomes possible to move.
Here, the predetermined dimension R (hereinafter referred to as a long hole margin dimension R) is sufficiently larger than the gap dimension T (see FIG. 7) between the bulk main body 45p such as the gusset inner member 43 and the load transmitting surface 34p of the cross member 30. It is set to a large value.

As shown in FIG. 6 and the like, the front plate portion 47f, the ceiling plate portion 47u, and the rear plate portion 47b end portions of the gusset outer member 47 on the center pillar 20 side end portion (right end portion) are respectively outward. Three flange portions 475 are formed by being bent by 90 °. A bolt hole 476 is formed in each flange portion 475 of the gusset outer member 47.
Further, as shown in FIGS. 3 and 7, bolt holes 236 are formed in the inner pillar 23 of the center pillar 20 at positions corresponding to the bolt holes 476 of the flange portions 475 of the gusset outer member 47. As shown in FIG. 7, a nut N is fixed to the back side surface 23 r of the inner pillar 23 at the position of the bolt hole 236 by welding or the like.

<About fixing gusset 40>
Next, a procedure for setting and fixing the gusset 40 having the above configuration between the center pillar 20 and the cross member 30 will be described.
Here, when the gusset 40 is fixed, the center pillar 20 and the cross member 30 are fixed to the body of the passenger car C in advance by welding or the like. Further, a lid-like bulk 45 is fixed to the end portion of the gusset inner member 43 constituting the gusset 40 by welding or the like, and further, the upper portion of the gusset inner member 43 and the lid-like bulk 45 are covered with a gusset outer member 47. It is fixed by welding or the like.
In this state, the gusset 40 is set between the center pillar 20 and the cross member 30. That is, the end portion of the gusset outer member 47 of the gusset 40 is covered with the end portion of the outer member 35 of the cross member 30, and the gusset inner member 43 and the lid-like bulk 45 are loaded on the side wall surface 23 w of the center pillar 20 and the cross member 30. Set between the transmission surface 34p. Then, as shown in FIG. 7, the long holes 472 and 474 of the gusset outer member 47 are aligned with the bolt holes 352 (342) and 354 (344) of the outer member 35 (inner member 34) of the cross member 30. Further, the bolt holes 476 of the flange portions 475 of the gusset outer member 47 are aligned with the bolt holes 236 of the center pillar 20 (inner pillar 23). Further, as shown in FIG. 3, the bolt hole 432 of the flange portion 430 formed at the lower end portion of the gusset inner member 43 of the gusset 40 is aligned with the bolt hole 323 of the base member 32 of the cross member 30.

As described above, the gusset inner member 43 and the lid-like bulk 45 (the gusset inner member 43 and the like) are set between the side wall surface 23w of the center pillar 20 and the load transmission surface 34p of the cross member 30. Since the gap T is formed between the bulk main body 45p such as the member 43 and the load transmission surface 34p of the cross member 30, the alignment of the gusset 40 is facilitated.
After the gusset 40 is set between the center pillar 20 and the cross member 30 in this way, the flange portion 430 of the gusset 40 (the gusset inner member 43) is used in the base member 32 of the cross member 30 using the bolt holes 432 and 323. Bolt B (see FIG. 3). Further, as shown in FIG. 7, each flange portion 475 of the gusset 40 (gusset outer member 47) is bolted to the center pillar 20 (inner pillar 23) using bolt holes 476 and 236. Further, the end portion of the gusset outer member 47 of the gusset 40 is connected to the end portion of the outer member 35 of the cross member 30 as shown in FIGS. 7 to 9 by elongated holes 472 and 474 and bolt holes 352 (342) and 354. Use (344) to fix bolt B.
In this state, fixing of the gusset 40 is completed.

<About the operation of the gusset 40 at the time of a side collision>
Next, the operation of the gusset 40 when the passenger car C undergoes a side collision will be described.
When the passenger car C undergoes a side collision, the collision load is absorbed to some extent by the first bulk 27 and the second bulk 24 of the center pillar 20 and then applied to the gusset 40. When a collision load is applied to the gusset 40 via the center pillar 20, the gusset outer member 47 and the gusset inner member 43 of the gusset 40 are simultaneously pressed indoors. As described above, since the end of the gusset outer member 47 is bolted to the end of the cross member 30 via the long holes 472 and 474, the gusset outer member 47 is relatively easy with respect to the cross member 30. Move to the indoor side. Here, the long hole margin dimension R is set to be sufficiently larger than the gap dimension T between the bulk main body 45p such as the gusset inner member 43 and the load transmission surface 34p of the cross member 30. For this reason, when a collision load is applied to the gusset 40, the elongated holes 472 and 474 of the gusset outer member 47 are formed after the bulk main body 45 p such as the gusset inner member 43 abuts against the load transmission surface 34 p of the cross member 30. Of the cross member 30 comes into contact with the side surface of the bolt B of the cross member 30.
For this reason, when a collision load is applied to the gusset 40, an excessive force is not applied to the bolt B, and the cutting of the bolt B can be prevented. Then, the collision load is efficiently applied from the gusset 40 to the cross member 30 in a state where the bolt B or the like is functioning.

<Advantages of the floor structure of the passenger car C according to this embodiment>
According to the floor structure of the passenger car C according to the present embodiment, a gap T is formed between the bulk main body portion 45p of the gusset 40 (the gusset inner member 43 and the like) and the load transmission surface 34p of the cross member 30. Can be set between the cross member 30 and the center pillar 20 in a later process. Further, the gusset outer member 47 of the gusset 40 is connected to the center pillar 20 and the cross member 30 using bolts B and nuts N, respectively. For this reason, the gusset 40 can be set between the cross member 30 and the center pillar 20 and can be connected to the center pillar 20 and the cross member 30 in a factory flow operation.
Further, the gusset 40 and the cross member 30 are connected using the long holes 472 and 474 and bolts B, nuts N, etc., and the gusset 40 (the gusset outer member 47) and the cross are at least as large as the dimension of the gap T. Both 47 and 30 are connected in a state in which relative movement in the vehicle width direction with respect to the member 30 is allowed.
For this reason, for example, when a side collision load is applied to the vehicle, an excessive force is not applied to the bolt B or the like, and the damage to the bolt B can be prevented. Since the gusset 40 and the cross member 30 move relative to each other in the vehicle width direction while the bolt B or the like is functioning, the bulk main body 45p (load transmission surface) of the gusset 40 and the load transmission surface of the cross member 30 are used. 34p comes into contact with certainty.
Therefore, the side collision load is reliably transmitted to the cross member 30 via the center pillar 20 and the gusset 40. Thereby, even if the clearance T is formed between the gusset 40 and the cross member 30, the load transmission efficiency at the time of a side collision does not fall.

The end portion of the gusset 40 (the gusset outer member 47) is configured so as to cover the end portion of the cross member 30 from the front side, the upper surface side, and the rear surface side. The gusset outer member 47 and the cross member 30 are connected on the front side and the upper side. As described above, since the connecting mechanism using the bolts B or the like is provided in the portion that is easy to see and work, the working efficiency of the connecting work between the gusset 40 and the cross member 30 is improved.
Further, since the gusset outer member 47 of the gusset 40 covers the gusset inner member 43 and the end of the cross member 30 from the three sides of the front side, the upper side, and the rear side, the gusset inner side when receiving a side collision load The member 43 is guided by the gusset outer member 47, so that the bulk main body 45p (load transmission surface) of the gusset inner member 43 is surely brought into contact with the load transmission surface 34p of the cross member 30.
Moreover, since the lid-shaped bulk 45 provided with the bulk main body 45p (load transmission surface) and the gusset inner member 43 are separate members, the configuration of the gusset inner member 43 can be simplified.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in this embodiment, the example which forms the load transmission surface (bulk main-body part 45p) by closing the edge part opening of the gusset inner member 43 of the gusset 40 with the lid-shaped bulk 45 was shown. However, for example, it is also possible to configure the load transmission surface by bending the end portions of the front plate portion 43f and the rear plate portion 43b of the gusset inner member 43 inward by about 90 ° and overlapping each other.
Moreover, in this embodiment, the example which comprises the gusset 40 from the gusset inner member 43 and the gusset outer member 47 was shown. However, the gusset inner member 43 and the gusset outer member 47 can be integrated.

20 ... center pillar 30 ... cross member 34 ... inner member 34p ... load transmission surface 40 ... gusset 43 ... gusset inner member 45p ... bulk body (load transmission surface)
45 ... Lid bulk (bulk)
47 ... Gusset outer member 342 .. Bolt hole (connection mechanism)
344 .. Bolt hole (connection mechanism)
472 ・ ・ Long hole (connecting mechanism)
474 ・ ・ Long hole (connecting mechanism)
B ... Bolt (connecting member of connecting mechanism)
N ... Nut (member to be connected to the connecting mechanism)
T ・ ・ ・ ・ Gap

Claims (5)

Pillars erected on both sides in the vehicle width direction at the position of the passenger compartment, a cross member extending in the vehicle width direction between the left and right pillars, and the left and right pillars provided between the cross members and the pillars A floor structure of a vehicle including left and right gussets that support the vehicle from the vehicle interior side,
A gap necessary for setting the gusset between the cross member and the pillar is formed between the gusset and the cross member,
The gusset and the cross member are provided with load transmission surfaces facing each other through the gap in the vehicle width direction,
The gusset is connected to the pillar and the cross member using a connection mechanism including a connecting member and a connected member, and the connecting mechanism for connecting the gusset and the cross member includes at least the gap. A vehicle floor structure characterized in that the gusset and the cross member are connected to each other in a state in which relative movement in the vehicle width direction is allowed by the dimension of. The vehicle floor structure according to claim 1,
The connecting mechanism for connecting the gusset and the cross member is provided in a bolt hole provided in one of the gusset and the cross member, and provided in either one of the gusset and the cross member. A vehicle floor structure comprising a long long hole, a bolt that passes through the long hole and the bolt hole, and a nut that is screwed into the bolt. The floor structure of a vehicle according to claim 1 or 2,
The end of the gusset covers the end of the cross member from the front side, the top side, and the rear side,
The vehicle floor structure according to claim 1, wherein the connecting mechanism is configured to connect the gusset and the cross member on a front side and an upper side. A vehicle floor structure according to any one of claims 1 to 3, wherein
The gusset is composed of a gusset inner member fixed to the cross member, and a gusset outer member that covers the gusset inner member from three sides of the front side, the upper side, and the rear side,
The load transmitting surface is provided on the gusset inner member;
The gusset outer member is configured to be connected to the end of the cross member by the connecting mechanism in a state where the end of the cross member covers the three sides of the front side, the upper side, and the rear side. A vehicle floor structure characterized by The vehicle floor structure according to claim 4,
The gusset inner member is formed in a substantially inverted U-shaped cross section by a front plate portion, a ceiling plate portion, and a rear plate portion,
A floor structure of a vehicle, wherein a load transmission surface is formed by covering an end portion of the gusset inner member with a lid-like bulk.

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