JP2015160511A - Vehicle body lower part structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reinforce a tie-down hole peripheral part and a jack-up portion and reduce the number of components in a vehicle body lower part structure of a vehicle in which a tie-down hole is provided at each side sill.SOLUTION: In a vehicle body lower part structure of a vehicle, a tie-down hole 23 with which a tie-down hook engages is formed at a portion of a bottom wall part 19d of a side sill inner 19 which is located adjacent to the vehicle rear side of a jack-up part 41. A bracket body 27 of a reinforcement bracket 25 which reinforces a tie-down hole 23 peripheral part is provided on the bottom wall part 19d. A front side partition wall 33, which is disposed between the bracket body 27 and a vehicle front side end of the jack-up part 41, extends to the upper side, and partitions an inner space of the side sill 3 in a vehicle fore and aft direction, is provided at the bracket body 27.

Description

  The present invention relates to a vehicle body lower structure of a vehicle, and more particularly to a vehicle having a side sill in which a tie-down hole with which a tie-down hook is engaged is formed.

  2. Description of the Related Art Conventionally, a tie-down hole for fixing a vehicle when transported by various transport means such as a trailer, a railway freight car, and a transport ship is provided at the lower part of the vehicle body.

  An example of such a vehicle is disclosed in Patent Document 1. In the vehicle of this Patent Document 1, side sills extending in the vehicle front-rear direction are disposed on the left and right sides of the floor panel, and the lower surface of the floor panel is joined to the upper surface thereof. A cross member extending in the vehicle width direction is disposed on the lower surface of the floor panel, and an end of the cross member is joined to a side sill. A rear side frame extending in the vehicle front-rear direction is disposed inside the side sill in the vehicle width direction, and the rear side frame is joined to the lower surface of the floor panel. The rear side frame has a vertical width smaller than that of the side sill, and its bottom wall is located above the lower end of the side sill. A semicircular cutout is formed at a corner formed by a curved portion of the rear side frame of the rear side frame and a side sill in the bottom wall of the rear side frame. A tie-down bracket in which a tie-down hole for engaging a tie-down hook is formed on the bottom wall is fitted and fixed to the notch.

Japanese Patent Laid-Open No. 10-76978

  However, in the vehicle of Patent Document 1, when the tie-down hook is locked to the tie-down hole, the tie-down hook is passed through the vehicle body from the outside in the vehicle width direction and locked to the tie-down hole. At that time, the side sill is arranged on the outer side in the vehicle width direction of the tie-down bracket, that is, on the front side for the operator, and the operator has to pass the tie-down hook under the side sill and lock it. Locking operation becomes difficult. Therefore, it is conceivable that the tie-down hole is not provided on the rear side frame side but on the side sill on the front side. In that case, since the rigidity of the side sill tie-down hole is reduced by forming the tie-down hole, it is necessary to provide a reinforcing member for reinforcing the tie-down hole peripheral part.

  On the other hand, the side sill is formed with a jack-up portion that is supported by the jack at the time of jack-up. A relatively high rigidity is required for the jack-up portion because a support load by the jack acts from below. Therefore, the following measures are taken. That is, a flange that extends downward in the vehicle and extends in the vehicle front-rear direction is formed on the bottom wall portion of the side sill having a closed cross-sectional shape. The flange is recessed downward with a curved surface from the general surface of the upper surface of the bottom wall portion, so that the vertical width is narrow. A jack-up portion is formed in the narrow portion. In the side sill, a partition member for partitioning the inside of the side sill in the vehicle front-rear direction is disposed at a position adjacent to the jack up portion, and the jack up portion is reinforced by the partition member.

  However, if a reinforcing member for reinforcing the periphery of the tie-down hole as described above is separately provided in addition to the reinforcing member for reinforcing the jack-up portion that has been conventionally provided, there is a problem that the number of parts, weight, and cost increase. is there.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a tie-down hole peripheral portion while suppressing the number of parts in a vehicle body lower structure of a vehicle in which a tie-down hole is provided on a side sill. This is to achieve both the reinforcement of the jack and the reinforcement of the jack-up portion.

  In order to achieve the above object, the present invention provides a tie-down hole in the side sill so as to be close to the jack-up portion, and a partition member is provided between the tie-down hole and the anti-tie-down hole side end of the jack-up portion. It is provided.

  Specifically, the present invention provides a vehicle in which side sills extending in the front-rear direction are provided at both ends in the vehicle width direction of a floor panel forming a floor surface of a passenger compartment, and a jack-up portion supported by a jack is formed on the side sill. The following solutions were taken for the undercarriage of the car body.

  That is, in the first invention, the side sill has a closed cross-sectional shape, a flange extending in the vehicle front-rear direction from the bottom wall portion projects downward, and the jack-up portion is a general surface of the upper surface of the bottom wall portion. A tie-down hook is formed at a portion adjacent to the jack-up portion of the bottom wall portion in the vehicle front-rear direction by forming the curved portion with a curved surface so that the flange has a narrow vertical width. A tie-down hole to be locked is formed, and a reinforcing member that reinforces the peripheral portion of the tie-down hole is provided on the bottom wall portion, and the reinforcing member has a reaction between the reinforcing member and the jack-up portion. A partition member is provided between the side end of the reinforcing member and extends upward to partition the inside of the side sill in the vehicle front-rear direction.

  According to the first invention, the tie-down hole is formed adjacent to the jack-up portion, and the tie-down hole peripheral portion having low rigidity is reinforced by the reinforcing member. Further, a partition member integral with the reinforcement member is disposed between the reinforcement member and the end of the jack-up portion on the side opposite to the reinforcement member. The up portion can be reinforced. Accordingly, it is possible to reinforce the periphery of the tie-down hole and the jack-up portion while suppressing the number of parts.

  According to a second invention, in the first invention, the bead portion protruding from the curved surface to a position substantially equal to the general surface of the bottom wall portion from the curved surface to the jack-up portion corresponding position of the bottom wall portion. The reinforcing member has an extension portion that extends to the bead portion in the longitudinal direction of the vehicle and is joined to the bead portion.

  According to the second invention, the bead portion is formed in the jack-up portion, and further, a part of the reinforcing member that reinforces the tie-down hole peripheral portion is joined to the bead portion, so that the jack-up portion is further reinforced. The

  According to a third aspect of the present invention, in the second aspect of the present invention, a kick-up portion that is stepped up at the rear of the vehicle is formed at the boundary between the front floor panel and the rear front panel at the rear of the vehicle. A cross member extending in the vehicle width direction and having both ends connected to the pair of side sills is provided on the rear side of the kick-up portion, and the partition member corresponds to the cross member on the inner peripheral surface of the side sill. It is characterized by being joined to.

  According to the third invention, since the partition member provided at the position adjacent to the jack-up portion is joined to the cross member-corresponding portion on the inner peripheral surface of the side sill, the support load from the jack is increased during the jack-up. The cross member acts on the cross member via the up portion and the partition member, and the cross member receives the support load. As described above, since the support load is transmitted to the cross member having a relatively high rigidity, it is possible to suppress the deformation of the side sill.

  As described above, according to the present invention, it is possible to achieve both reinforcement of the tie-down hole peripheral portion and reinforcement of the jack-up portion while suppressing the number of parts.

It is a bottom view showing the appearance of the back of the vehicle in the vehicle body lower part structure according to the embodiment of the present invention. It is the II section enlarged view of FIG. It is a perspective view which shows the vehicle body lower part structure of the vehicle which concerns on embodiment. FIG. 3 is a view corresponding to FIG. 2 in a state where a rear side frame is removed. It is the VV sectional view taken on the line of FIG. It is a side view of the vehicle body lower part structure of a vehicle in the state where a frame side outer panel and a side sill outer were removed. It is a figure which shows a reinforcement bracket, Comprising: (a) is a top view, (b) is a front view, (c) is a side view. It is a figure which shows the positional relationship of a reinforcement bracket, a floor panel, and a cross member. FIG. 7 is a view corresponding to FIG. 6 illustrating a vehicle body lower part structure according to a modification of the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the following description of preferable embodiment is only an illustration essentially, and is not intending restrict | limiting this invention, its application thing, or its use.

  FIG. 1 is a bottom view showing an appearance of the vehicle rear side of the vehicle body lower structure of the vehicle 1, and FIG. 2 is an enlarged view of a portion II in FIG. 1. In the figure, arrows Fr and Re indicate the vehicle front-rear direction, arrow F indicates the vehicle front, and arrow R indicates the vehicle rear. Furthermore, arrows R and L indicate the vehicle width direction, arrow R indicates the vehicle right direction, and arrow L indicates the vehicle left direction. Therefore, FIG. 2 shows a vehicle right side portion of the vehicle body lower structure.

  A pair of side sills 3 and 3 extending in the vehicle front-rear direction are provided at a lower portion of the vehicle body of the vehicle 1 with an interval in the vehicle width direction. A frame side outer panel 5 forming an external appearance is attached to the side surface of each side sill 3 on the outer side in the vehicle width direction. The pair of side sills 3 and 3 are connected by a floor panel 7 that forms a floor surface of a passenger compartment (not shown).

  The floor panel 7 includes a front floor panel 7a that forms a vehicle front side portion of the floor surface, and a rear floor panel 7b that is disposed behind the vehicle and forms a vehicle rear side portion of the floor surface. . A pair of rear side frames 9, 9 extend in the vehicle front-rear direction below both ends of the rear floor panel 7b in the vehicle width direction.

  A rear wheel house 11 is connected to the rear end of each side sill 3, and a knuckle 13 for supporting a wheel is provided inside the rear wheel house 11. A recess 9 a is formed in front of the rear wheel house 11 on the bottom surface of each rear side frame 9. A fixing bolt 15 for fixing the front end of the trailing arm 13, which is one of suspension suspension members, is disposed in the recess 9 a, and the trailing end of the trailing arm 13 is connected to the knuckle 13. ing.

  FIG. 3 is a perspective view of the lower structure of the vehicle body as viewed from the upper right front. In FIG. 3, the side sill 3 is omitted.

  The rear floor panel 7b is disposed above the vehicle relative to the front floor panel 7a. At the boundary between the front floor panel 7a and the rear floor panel 7b, the rear floor panel 7b is kicked up so as to rise rearward of the vehicle. A portion 7c is formed.

  A cross member 17 extending in the vehicle width direction is disposed behind the kick-up portion 7c in the vehicle width direction. The cross member 17 includes the pair of side sills 3, 3 disposed on both sides in the vehicle width direction. Are connected. Further, at the rear side of the kick-up portion 7c, the front end portion of each rear side frame 9 is joined to the side surface in the vehicle width direction of the side sill 3 disposed on the outer side in the vehicle width direction.

  The pair of side sills 3 have substantially the same configuration. Therefore, here, the configuration of the side sill 3 on the right side of the vehicle will be described, and the description of the configuration of the side sill 3 on the left side of the vehicle will be omitted.

  FIG. 4 is a view corresponding to FIG. 2 in a state where the rear side frame 9 is removed. FIG. 5 is a cross-sectional view taken along line VV in FIG.

  The side sill 3 has a closed cross-sectional shape as shown in FIG. 5, a side sill inner 19 disposed on the inner side in the vehicle width direction, a side sill outer 21 joined to the side sill inner 19 from the outer side in the vehicle width direction, have.

  The side sill outer 21 has a hat shape in cross section, and is formed with a recess 21a that opens inward in the vehicle width direction and extends in the vehicle front-rear direction.

  The side sill outer 21 includes a vertical wall portion 21b to which the frame side outer panel 5 is bonded to an outer surface and forms a bottom portion of the concave portion 21a, and an upper wall portion 21c extending inward in the vehicle width direction from the upper end of the vertical wall portion 21b. And a bottom wall portion 21d extending inward in the vehicle width direction from the lower end of the vertical wall portion 21b. Further, an upper flange 21e projects upward from the vehicle width direction inner end of the vertical wall portion 21b, while a lower flange 21f projects downward from the vehicle width direction inner end of the bottom wall portion 21d. The upper wall portion 21c is formed with a ridge portion 21g that protrudes inward in the vehicle width direction and extends in the vehicle front-rear direction, thereby increasing the rigidity of the side sill outer 21.

  On the other hand, the side sill inner 19 is joined to the front end of the rear side frame 9. The side sill inner 19 has a hat-like cross section like the side sill outer 21, and is formed with a recess 19a that opens outward in the vehicle width direction and extends in the vehicle front-rear direction.

  The side sill inner 19 is joined to the front end portion of the rear side frame 9 and forms a bottom portion of the concave portion 19a, and an upper wall portion 19c extending outward in the vehicle width direction from the upper end of the vertical wall portion 19b. And a bottom wall portion 19d that extends outward in the vehicle width direction from the lower end of the vertical wall portion 19b and faces the upper wall portion 19c. Further, the upper flange 19e projects upward from the vehicle width direction outer end of the upper wall portion 19c, while the lower flange 19f (flange) projects from the vehicle width direction outer end of the bottom wall portion 19d to the vehicle lower side. ing. Then, the upper flange 21e and the lower flange 21f are joined to the upper flange 19e and the lower flange 19f from the outside in the vehicle width direction by welding or the like, respectively.

  As shown in FIG. 4, a tie-down hole 23 in which a tie-down hook (not shown) is locked is formed at a position corresponding to the front end of the rear floor panel 7b of the bottom wall portion 19d. The tie-down hole 23 is a long hole that is long in the vehicle front-rear direction. A reinforcing bracket 25 that reinforces the periphery of the tie-down hole 23 is provided at a position corresponding to the tie-down hole 23 in the recess 19a.

  FIG. 6 is a view of the vehicle body lower structure when the frame side outer panel 5 and the side sill outer 21 are removed as viewed from the right side of the vehicle. FIG. 7 is a view showing the reinforcing bracket 25, wherein (a) is a plan view, (b) is a front view, and (c) is a side view.

  The reinforcing bracket 25 is formed by bending a single steel plate, and is a substantially rectangular plate-shaped bracket body 27 (reinforcement) joined to a portion corresponding to the tie-down hole 23 on the bottom wall portion 19d by welding or the like. Member), a vertical plate portion 29 that rises upward from the inner end in the vehicle width direction of the bracket main body 27 and is joined to the vertical wall portion 19b by welding or the like, and downward from the outer end in the vehicle width direction of the bracket main body 27. A bracket flange 31 that extends and is joined to the lower flange 19f by welding or the like from the outside in the vehicle width direction, and a pair of partitions that rise upward from both ends in the vehicle front-rear direction of the bracket body 27 and partition the recess 19a in the vehicle front-rear direction. And walls 33 and 35 (partition members).

  The bracket body 27 is provided over the entire width direction of the bottom wall portion 19d, and a through hole 27a having substantially the same shape as the tie-down hole 23 is formed from the center in the vehicle front-rear direction to the front end portion. ing. Note that a corner of the bracket main body 27 at the front of the vehicle and in the vehicle width direction is cut out.

  The vertical plate portion 29 has a substantially trapezoidal plate shape, and the vehicle rear side portion is inclined forward of the vehicle toward the vehicle upper side.

  The bracket flange 31 has a rectangular plate shape and has substantially the same vertical width as the lower flange 19 f of the side sill inner 19.

  Of the pair of partition walls 33, 35, a rear partition wall 35 (hereinafter referred to as a rear partition wall 35) has a substantially rectangular plate shape and extends from the bracket body 27 to the upper wall portion 19c above the vehicle. It extends.

  At the upper end of the rear partition wall 35, a substantially rectangular plate-like upper joint piece 35a elongated in the vehicle width direction and joined to the upper wall portion 19c by welding or the like is formed. Further, at the inner end in the vehicle width direction of the rear partition wall 35, three inner joining pieces 35b, 35b, 35b joined to the vertical wall portion 19b by welding or the like are formed at intervals in the vehicle vertical direction. ing. The upper joint piece 35a extends from the upper end of the rear partition wall 35 so as to incline upward toward the rear of the vehicle. On the other hand, the inner joint pieces 35b, 35b, 35b are bent substantially vertically from the inner end in the vehicle width direction of the rear partition wall 35 to the rear of the vehicle. The inner joining pieces 35b, 35b, 35b have substantially the same protruding dimensions.

  The rear partition wall 35 is formed with a substantially U-shaped rib 37 that opens outward in the vehicle width direction. In FIG. 7B, only the upper end portion of the rib 37 is shown.

  On the other hand, of the pair of partition walls 33, 35, the front partition wall 33 (hereinafter referred to as the front partition wall 33) has a substantially trapezoidal plate shape as shown in FIG. The vertical width increases toward the upper side of the vehicle from the bracket body 27 to the upper wall portion 19c. The lower end of the front partition wall 33 and the inner corner in the vehicle width direction are notched.

  A pair of upper joining pieces 33a, 33a joined to the upper wall portion 19c by welding or the like are formed at the upper end of the front partition wall 33 with a gap in the vehicle width direction. A pair of inner joining pieces 35b, 35b joined to the vertical wall portion 19b by welding or the like are formed at the inner end in the vehicle width direction of the front partition wall 33 with an interval in the vehicle vertical direction. The upper joint pieces 35a and 35a and the inner joint pieces 35b and 35b are bent substantially vertically from the end of the front partition wall 33 toward the front of the vehicle. The pair of upper joint pieces 35a, 35a have substantially the same protruding dimensions as shown in FIG. On the other hand, as shown in FIGS. 6 and 7C, the upper inner joint piece 35b of the pair of inner joint pieces 35b and 35b protrudes further forward of the vehicle than the lower inner joint piece 35b. Yes.

  Further, as shown in FIG. 7B, a substantially U-shaped rib 39 that opens outward in the vehicle width direction is formed in the front partition wall 33. The rib 39 is formed by recessing a part of the front partition wall 33 toward the rear of the vehicle, and an upper rib 39a extending in the vehicle width direction along the upper end of the front partition wall 33 in order from the upper side, The upper rib 39a includes a vertical rib 39b extending downward from the inner end in the vehicle width direction, and a lower rib 39c extending downwardly from the lower end of the vertical rib 39b toward the outer side in the vehicle width direction. . The upper rib 39a extends in the vehicle width direction toward the upper inner joint piece 35b, while the lower rib 39c extends in the vehicle width direction toward the lower inner joint piece 35b. ing.

  FIG. 8 is a view showing a positional relationship between the reinforcing bracket 25 and the floor panel 7 and the cross member 17. In addition, in FIG. 8, the said reinforcement bracket 25 is shown with the virtual line.

  The cross member 17 is inclined upward toward the rear of the vehicle behind the kick-up portion 7c. The front partition wall 33 of the reinforcing bracket 25 is located outside the cross member 17 in the vehicle width direction. The inner joint piece 33b on the upper side of the front partition wall 33 is joined to the center of the cross member 17 in the vehicle vertical direction on the inner peripheral surface of the vertical wall portion 19b of the side sill inner 19.

  When a collision load acts on the frame side outer panel 5 and the side sill outer 21 at the time of a vehicle-side collision, the front side partition wall 33 and the rear side partition wall 35 that partition the concave portion 19a in the vehicle front-rear direction are received. Therefore, deformation of the side sill 3 can be suppressed.

  Next, the collision load acting on the front partition wall 33 is mainly transmitted through the upper rib 39a and the lower rib 39c extending in the vehicle width direction of the rib 39, and converges on the vertical rib 39b, and the pair of upper and lower parts It acts on the inner joining pieces 33b and 33b. The collision load acts on the vertical wall portion 19b of the side sill inner 19 through the inner joint piece 33b, and acts on the cross member 17 located on the inner side in the vehicle width direction.

  Thus, the transmission path of the collision load at the time of the vehicle side collision, that is, the load path is connected to the cross member 17 having a relatively high rigidity. Accordingly, it is possible to suppress deformation of the vehicle body lower structure.

  Further, since the collision load is efficiently transmitted to the inside in the vehicle width direction by the rib 39 formed on the front partition wall 33, the deformation of the side sill 3 can be further suppressed.

  On the other hand, as shown in FIG. 4, a jack-up portion 41 where the vehicle 1 is supported by a jack (not shown) at a portion corresponding to the cross member 17 of the side sill 3, that is, a portion adjacent to the front side of the tie-down hook. Is formed.

  As shown in FIG. 6, a portion of the bottom wall portion 19d of the side sill inner 19 corresponding to the jack-up portion 41 is recessed downward with a curved surface 43 from the general surface of the upper surface of the bottom wall portion 19d. Due to the curved surface 43, the portion corresponding to the jack-up portion 41 of the lower flange 19f of the side sill inner 19 has a narrow vertical width. Therefore, the narrow portion has higher rigidity than the other portions of the lower flange 19f. Therefore, the narrow portion is supported by the jack. Thus, the jack-up portion 41 is formed by the narrow portion of the lower flange 19f.

  In the portion corresponding to the jack-up portion 41 of the bottom wall portion 19d, a bead portion 45 projecting upward from the curved surface 43 to substantially the same height as the general surface of the bottom wall portion 19d extends linearly in the vehicle width direction. It is formed as follows. By forming the bead portion 45 in this way, the rigidity of the jack-up portion 41 is further increased.

  As shown in FIG. 6, the front partition wall 33 of the reinforcing bracket 25 includes the bracket body 27, the end of the jack-up portion 41 on the side opposite to the bracket body 27, that is, the vehicle front side end of the curved surface 43. Between the two. In this way, the tie-down hole 23 is formed adjacent to the jack-up portion 41, and the peripheral portion of the tie-down hole 23 with low rigidity is reinforced by the bracket body 27 of the reinforcing bracket 25. Furthermore, by arranging the front partition wall 33 which is also a part of the reinforcing bracket 25, further reinforcement of the peripheral portion of the tie-down hole 23 and reinforcement of the jack-up portion 41 are possible.

-Effects of the embodiment of the invention-
According to the embodiment, the tie-down hole 23 is formed adjacent to the jack-up portion 41, and the peripheral portion of the tie-down hole 23 with low rigidity is reinforced by the bracket body 27 of the reinforcing bracket 25. Further, the front partition wall 33 integral with the bracket body 27 is disposed between the bracket body 27 and the end of the jack-up portion 41 on the side opposite to the bracket body 27, so that the one front partition wall 33 ties down. Further reinforcement of the periphery of the hole 23 and reinforcement of the jack-up portion 41 are possible. Therefore, it is possible to reinforce the periphery of the tie-down hole 23 and the jack-up portion 41 while suppressing the number of parts.

  Moreover, according to the said embodiment, since the front side partition wall 33 provided in the position adjacent to the jackup part 41 is joined to the cross member 17 corresponding | compatible part in the vertical wall part 19b of the side sill inner 19, The support load from the jack acts on the cross member 17 via the jack-up portion 41 and the front partition wall 33, and the cross member 17 receives this support load. As described above, since the support load is transmitted to the cross member 17 having a relatively high rigidity, the deformation of the side sill 3 can be suppressed.

(Modification)
FIG. 9 is a view corresponding to FIG. 6 illustrating a vehicle body lower part structure according to a modification of the embodiment.

  The reinforcing bracket 47 according to this modified example is different from the above embodiment in that it has an extension portion 49 extending from the bracket body 27 to the bead portion 45 in front of the vehicle. Since other configurations are substantially the same as those of the above-described embodiment, the description thereof is omitted here.

  The extension 49 extends from the front end of the bracket body 27 to the front of the vehicle to the protruding end of the bead portion 45. The extension 49 is joined to the protruding end by welding or the like.

  Thus, the reinforcement bracket 25 and the bead part 45 are joined. Therefore, the jack-up portion 41 is reinforced by the reinforcing bracket 25 and the reinforcing bracket 25 is reinforced by the bead portion 45. Accordingly, the rigidity around the tie-down hole 23 is further increased, and the rigidity of the jack-up portion 41 is further increased.

  In the above embodiment, the jack-up portion 41 is formed in the front of the tie-down hole 23 and the front partition wall 33 is disposed between the bracket body 27 and the front-side end of the jack-up portion 41. However, the present invention is not limited thereto, and the jack-up portion 41 is formed on the rear side of the tie-down hole 23, and the rear partition wall 35 is disposed between the bracket body 27 and the rear-side end of the jack-up portion 41. May be.

  As described above, the vehicle body lower part structure of the vehicle according to the present invention can be applied to an application that reinforces the tie-down hole peripheral part and the jack-up part while suppressing the number of parts.

DESCRIPTION OF SYMBOLS 1 Vehicle 3 Side sill 7 Floor panel 7a Front floor panel 7b Rear floor panel 7c Kick-up part 9 Rear side frame 17 Cross member 19 Side sill inner 19a Recessed part 19c Upper wall part 19d Bottom wall part 19f Lower flange (flange)
21 Side sill outer 23 Tie down hole 25 Reinforcement bracket 27 Bracket body (reinforcement member)
33 Front partition wall 35 Rear partition wall 41 Jack-up part 43 Curved surface 45 Bead part 47 Reinforcement bracket 49 Extension part

Claims (3)

A vehicle body lower part structure of a vehicle in which side sills extending in the front-rear direction are provided at both ends in the vehicle width direction of a floor panel forming a floor surface of a passenger compartment, and a jack-up portion supported by a jack is formed on the side sill,
The side sill has a closed cross-sectional shape, and a flange extending in the vehicle front-rear direction from its bottom wall portion projects downward,
The jack-up portion is formed by making the vertical width of the flange narrower by being recessed downward with a curved surface than the general surface of the upper surface of the bottom wall portion,
A tie-down hole in which a tie-down hook is locked is formed in a portion of the bottom wall portion adjacent to the jack-up portion in the vehicle front-rear direction.
On the bottom wall, a reinforcing member for reinforcing the periphery of the tie-down hole is provided,
The reinforcing member is provided with a partition member disposed between the reinforcing member and an end of the jack-up portion on the side opposite to the reinforcing member and extending upward to partition the side sill in the vehicle front-rear direction. The vehicle body lower part structure characterized by this. The vehicle body lower part structure according to claim 1,
A bead portion that protrudes upward from the curved surface to a position substantially the same as the general surface of the bottom wall portion is formed at a location corresponding to the jack-up portion of the bottom wall portion,
The vehicle body lower part structure according to claim 1, wherein the reinforcing member has an extension portion that extends in the vehicle front-rear direction to the bead portion and is joined to the bead portion. In the vehicle body lower part structure according to claim 1 or 2,
At the boundary portion between the front floor panel and the rear front panel behind the vehicle in the floor panel, a kick-up portion that is stepped up at the rear of the vehicle is formed,
A cross member extending in the vehicle width direction and having both ends connected to the pair of side sills is provided at the rear of the kick-up portion.
The vehicle body lower part structure according to claim 1, wherein the partition member is joined to a portion corresponding to the cross member on the inner peripheral surface of the side sill.

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