Body structure

Abstract

To provide a body structure capable of ensuring rigidity and strength against twisting of a cab. [Solution] The vehicle body structure includes an aisle arranged on the vehicle rear wall of the cabin, having a roughly rectangular opening that communicates in the fore-and-aft direction of the vehicle, connecting the cabin with a luggage compartment that is arranged rearward of the cabin, an opening lower frame arranged on the vehicle underside of the opening, a vehicle width direction one-side frame having a first bent portion and directly or indirectly connecting the vehicle width direction one-side end of the opening lower frame to the vehicle width direction one-side mount, and a vehicle width direction other-side frame having a second bent portion and directly or indirectly connecting the vehicle width direction other side end of the opening lower frame to the vehicle width direction other side mount.

Description

[Technical field]

[0001] The present disclosure relates to a vehicle body structure. [Background technology]

[0002] 2. Description of the Related Art As a conventional vehicle body structure, for example, a rear end lower structure of a cabin (also called a "cab") is known.

[0003] For example, Patent Document 1 describes a vehicle body structure which includes: a floor recess which is bent and recessed downwardly at the rear end of a floor panel; a cab lock bracket (also referred to as a "mount bracket") having a bottom portion to which a cab lock device is fixed and in which a striker insertion hole for inserting a striker is formed, and side portions which extend upward from both the left and right sides of the bottom and are joined to the rear surface of a back panel; and a back panel extension portion which has a vertical plate portion which extends downward from a rear part of the floor recess on the lower edge of the back panel, and a horizontal plate portion which bends and extends forward from the lower end of the vertical plate portion and is joined to the floor recess by overlapping above and below, and in which a bottom flange portion of the bottom is joined to the rear surface of the vertical plate portion and a lower surface of the bottom is joined to the upper surface of the floor recess.

[0004] That is, in the vehicle body structure described in Patent Document 1, the mount brackets arranged on both the left and right sides are connected at the lower end of the back panel, which makes it possible to ensure the rigidity and strength of the cab against twisting caused by road surface input while driving or cab inertial input while meandering.

[0005] Also, for example, in Patent Document 2, the rear cab mounting rail has a mounting bracket fixing portion supported from below by the rear cab mount via a rear cab mounting bracket (hereinafter abbreviated as "mount bracket"), and a supported area including the mounting bracket fixing portion, and extends in the vehicle width direction at the lower rear end of the cab body. The length of the supported area in the vehicle width direction is approximately the same as the length of the mounting bracket fixing portion in the vehicle width direction. The cab back panel stands up at the rear end of the cab body along the rear cab mounting rail. The back panel reinforcement has a widened lower end portion formed in a widened shape in which the length in the vehicle width direction gradually increases as it goes downward. A vehicle body structure is described in which the widened lower end portion has a lower end edge portion joined to the rear area of ​​the rear plate portion of the rear cab mounting rail.

[0006] That is, in the vehicle body structure described in Patent Document 2, the mounting brackets arranged on both sides in the vehicle width direction are connected by a rear cab mounting rail. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2012-232609 A [Patent Document 2] JP 2017-218119 A Summary of the Invention [Problem to be solved by the invention]

[0008] In some vehicle body structures, a back panel constituting the rear wall of the cab is provided with a passageway that connects the cab to a luggage compartment disposed behind the cab.

[0009] In the vehicle body structure described in the above Patent Document 1, the lower end of the back panel is divided at the center in the vehicle width direction to provide an aisle. This results in a structure in which the mount brackets on both sides in the vehicle width direction are not connected at the lower end of the back panel, making it difficult to ensure the rigidity and strength against twisting of the cab due to road input during driving or cab inertial input during meandering.

[0010] Furthermore, in the vehicle body structure described in Patent Document 2, the rear cab mounting rail is divided in the center in the vehicle width direction to provide an aisle. This results in a structure in which the mounting brackets on both sides in the vehicle width direction are not connected by the rear cab mounting rail, which also makes it difficult to ensure the rigidity and strength against twisting of the cab due to road input during driving or cab inertial input during meandering.

[0011] An object of the present disclosure is to provide a vehicle body structure that can ensure the rigidity and strength of the cab against torsion. [Means for solving the problem]

[0012] In order to achieve the above object, the vehicle body structure in the present disclosure includes: a passageway that is disposed in a vehicle rear side wall of the cabin, the passageway having a substantially rectangular opening that communicates in a vehicle front-rear direction, the passageway connecting the cabin and a luggage compartment that is disposed rearward of the cabin; A vehicle width direction one side mount bracket supported from below by a cab mount arranged on one side in the vehicle width direction; a vehicle width direction other side mount bracket supported from below by a cab mount arranged on the vehicle width direction other side; The opening on the underside of the vehicle Constituting the edge of An opening lower frame; An opening vehicle width direction one side edge portion constituting an edge of the opening on one side in the vehicle width direction; an opening vehicle width direction other side edge portion constituting an edge of the opening on the vehicle width direction other side; Has the first bending part Car A widthwise one side frame; Has a second bending part Car A frame on the other side in the width direction; Equipped with picture, The vehicle width direction one side frame further includes: A tip portion extending from the first bent portion to one side in the vehicle width direction The opening One side edge in the vehicle width direction and Vehicle width direction one side mount bracketand A tip portion extending from the first bent portion toward the bottom of the vehicle is connected to one end of the opening lower frame in the vehicle width direction, The vehicle width direction other side frame further includes: A tip portion extending from the second bent portion to the other side in the vehicle width direction The opening The other side edge in the vehicle width direction and the Vehicle width direction other side mount bracket and A tip portion extending from the second bent portion toward the bottom of the vehicle is connected to the other end of the opening lower frame in the vehicle width direction. Effect of the Invention

[0013] According to the present disclosure, it is possible to ensure the rigidity and strength of the cab against torsion. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a side view showing an example of a vehicle equipped with a vehicle body structure according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a partial rear view of one side portion in the vehicle width direction, which is half the length from the center portion in the vehicle width direction to one side end portion in the vehicle width direction, in the vehicle body structure according to this embodiment, as viewed from the rear side of the vehicle. [Diagram 3] FIG. 3 is a partial perspective view of one side portion in the vehicle width direction, which is half the length from the center portion in the vehicle width direction to one side end portion in the vehicle width direction in the vehicle body structure according to this embodiment, as viewed obliquely from above and rearward of the vehicle. [Figure 4] FIG. 4 is a rear view of the gusset as viewed from the rear side of the vehicle. [Diagram 5] FIG. 5 is a plan view of the gusset as viewed from above the vehicle. [Figure 6] FIG. 6 is a partial perspective view of the other vehicle width direction portion, which is the half portion extending from the vehicle width direction center portion to the vehicle width direction other side end portion in the vehicle body structure according to this embodiment, as viewed obliquely from above and rear of the vehicle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. FIG. 1 is a side view showing an example of a vehicle equipped with a vehicle body structure according to an embodiment of the present disclosure. FIG. 1 depicts a TL axis, a WL axis, and a BL axis. The left-right direction is referred to as the TL direction or the vehicle front-rear direction, the right direction is referred to as the vehicle rear side, the vehicle rear direction, or the "+TL direction", and the left direction is referred to as the vehicle front side, the vehicle front direction, and the "-TL direction". The up-down direction is referred to as the WL direction, the vehicle up-down direction, or the vehicle height direction, the up direction is referred to as the vehicle upper side, the vehicle upper direction, or the "+WL direction", and the down direction is referred to as the vehicle lower side, the vehicle lower direction, and the "-WL direction". The depth direction of the paper is referred to as the BL direction or the vehicle width direction, the near side is referred to as one side of the vehicle width direction or the "+BL direction", and the far side is referred to as the other side of the vehicle width direction and the "-BL direction".

[0016] As shown in FIG. 1, the vehicle body structure in the embodiment of the present disclosure is applied to a commercial vehicle (CV) in which a luggage compartment (not shown) is arranged on the vehicle rear side (+TL direction) of the cab 10. The CV in the present embodiment is provided with a passageway PW (see FIG. 2) connecting the cab 10 and the luggage compartment. Note that the vehicle body structure in the present disclosure is not limited to CVs, but may also be applied to vehicles in which a separate room is arranged on the vehicle rear side of the cab 10 and a passageway is provided connecting the cab 10 and the separate room. Also, although the vehicle body structure in the present disclosure is applied to a high roof type vehicle, it is not limited to the high roof type.

[0017] Fig. 2 is a partial rear view of one side portion in the vehicle width direction, which is half of the vehicle body structure according to this embodiment from the center in the vehicle width direction to the one side end in the vehicle width direction, as viewed from the rear side of the vehicle (+TL direction). Note that in Fig. 2, the other side portion in the vehicle width direction, which is half of the vehicle body structure from the center in the vehicle width direction to the other side end in the vehicle width direction, is omitted because it is configured symmetrically to the one side portion in the vehicle width direction. In the following description, the one side portion in the vehicle width direction will be mainly described, and the other side portion in the vehicle width direction will be described in terms of configurations that are different from those of the one side portion in the vehicle width direction, and descriptions of the same configurations will be omitted.

[0018] The CV has a side member 2 on one side (+BL direction) in the vehicle width direction extending in the vehicle front-rear direction (TL direction), a side member (not shown) on the other side (-BL direction) in the vehicle width direction extending in the vehicle front-rear direction (TL direction), and a plurality of cross members 3 extending in the vehicle width direction to connect the side members 2 together. The pair of side members 2 and the plurality of cross members 3 form a body frame 4 of the CV. A front cab mount (not shown) is disposed at the front end of the body frame 4. In addition, a rear cab mount 5 is disposed at the rear end of the body frame 4.

[0019] Each of the pair of side members 2 has a groove-shaped cross section and is disposed so that their groove openings face each other in the vehicle width direction (BL direction). Each of the pair of side members 2 has a groove upper wall 2a located above the groove opening, a groove lower wall 2b located below the groove opening, and a groove bottom wall 2c connecting the groove upper wall 2a and the groove lower wall 2b. Each of the groove upper wall 2a and the groove lower wall 2b has a horizontal plane in a rear view seen from the rear of the vehicle. The groove bottom wall 2c has a vertical plane in a rear view.

[0020] (Rear cab mount 5) The rear cab mount 5 is fastened to each of the pair of side members 2 by fasteners. The rear cab mount 5 has a vertical surface portion 5a, a horizontal surface portion 5b, a slope portion 5c, and a pair of flange portions 5d. The vertical surface portion 5a has a vertical plane in rear view, and is fastened to the groove bottom wall 2c. The horizontal surface portion 5b is disposed on one side in the vehicle width direction (+BL direction) and in the vehicle upper direction (+WL direction) from the vertical surface portion 5a, and has a horizontal plane in rear view. The slope portion 5c extends from the position of the upper end of the vertical surface portion 5a in the vehicle upper direction diagonally with respect to the one side in the vehicle width direction to a position near the other end of the horizontal surface portion 5b in the vehicle width direction.

[0021] The pair of flanges 5d are arranged to face each other in the vehicle front-rear direction (TL direction). One of the pair of flanges 5d is arranged to continue from the vehicle front end positions of the vertical surface portion 5a, the horizontal surface portion 5b, and the inclined surface portion 5c, and has a vertical surface in a side view seen from one side in the vehicle width direction (+BL direction). The other of the pair of flanges 5d is arranged to continue from the vehicle rear end positions of the vertical surface portion 5a, the horizontal surface portion 5b, and the inclined surface portion 5c, and has a vertical surface in a side view.

[0022] (Shock absorbing part 5e) A shock absorbing portion 5e is disposed on the horizontal surface portion 5b. The shock absorbing portion 5e has a flat plate 5f fastened onto the horizontal surface portion 5b, and a mounting rubber 5g disposed on the flat plate 5f.

[0023] (Cab 10) Next, the cab 10 will be described with reference to Fig. 1. The cab 10 is disposed on the vehicle upper side (+WL direction) of the vehicle body frame 4. The cab 10 has a cab body 11. The cab body 11 has a cab body bottom surface portion 11a that defines the vehicle lower side (-WL direction) of the cab body 11, a cab body front surface portion 11b that defines the vehicle front side (-TL direction) of the cab body 11, a cab body one side surface portion 11c that defines one side in the vehicle width direction (+BL direction) of the cab body 11, a cab body other side surface portion (not shown) that defines the other side in the vehicle width direction (-BL direction) of the cab body 11, and a cab body rear surface portion 11d that defines the vehicle rear side (+TL direction) of the cab body.

[0024] (Aisle PW, opening 35) Next, the passage PW and the opening 35 will be described with reference to FIG. 2. As described above, the CV is provided with the passage PW that connects the cab 10 and the luggage compartment (not shown). The passage PW has a substantially rectangular opening 35 that communicates in the vehicle front-rear direction (TL direction). The edge of the opening 35 on the lower side of the vehicle (-WL direction) is formed by an opening lower edge portion 35a. The edge of the opening 35 on the upper side of the vehicle (+WL direction) is formed by an opening upper edge portion (not shown). The edge of the opening 35 on one side in the vehicle width direction (+BL direction) is formed by an opening one side edge portion 35b. The edge of the opening 35 on the other side in the vehicle width direction (+BL direction) is formed by an opening other side edge portion (not shown).

[0025] (Cab body bottom part 11a, floor panel 13) Next, the cab body bottom portion 11a and the floor panel 13 will be described with reference to Figs. 1 and 2. The cab body bottom portion 11a has a floor panel 13 and a floor underframe 14. A vehicle rear edge portion 13a of the floor panel 13 is disposed on the vehicle upper side (+WL direction) of the cross member 3 and extends in the vehicle width direction (BL direction) along the cross member 3. A floor panel reinforcement 13b extending in the vehicle width direction is disposed on the vehicle rear edge portion 13a. The vehicle rear edge portion 13a and the floor panel reinforcement 13b form an opening lower edge portion 35a. The opening lower edge portion 35a corresponds to the "opening lower frame" of the present disclosure.

[0026] The floor panel 13 has side panels 13c that constitute the ends of the floor panel 13 on one side and the other side in the vehicle width direction. The side panel 13c has a step 13d that is located at a higher position than the general surface (including the vehicle rear edge 13a) of the floor panel 13, and a wall 13e that connects the step 13d and the general surface. A floor underframe 14 extending in the vehicle front-rear direction (TL direction) is fixed to the vehicle lower side surface of the step 13d. An end 14a on the vehicle front side (-TL direction) of the floor underframe 14 is disposed in correspondence with the end of the vehicle front side of the side panel 13c. An end 14b on the vehicle rear side (+TL direction) of the floor underframe 14 is disposed in correspondence with the end of the vehicle rear side of the side panel 13c (step 13d).

[0027] A reinforcing bracket 13f is disposed on the wall portion 13e at the end portion on the vehicle rear side of the side panel 13c. The reinforcing bracket 13f has a flat portion 13g having a plane perpendicular to the vehicle front-rear direction (TL direction). An end portion of the flat portion 13g on the vehicle lower side (-WL direction) is fixed to the opening lower edge portion 35a side. An end portion of the flat portion 13g on one side in the vehicle width direction (+BL direction) is fixed to the wall portion 13e side.

[0028] (Cab body rear part 11d, back panel 34) Next, the cab body rear surface portion 11d and the back panel 34 will be described with reference to Figs. 1 and 2. The cab body rear surface portion 11d has the back panel 34. The back panel 34 corresponds to the "vehicle rear wall" of the present disclosure. The back panel 34 has a vehicle width direction one-side back panel 34a arranged on one side in the vehicle width direction and a vehicle width direction other-side panel (not shown) arranged on the vehicle width direction other-side panel. The vehicle width direction one-side back panel 34a is arranged on the vehicle upper side (+WL direction) of the vehicle rear end portion 14b of the floor underframe 14.

[0029] The gap between the back panel 34a on one side in the vehicle width direction and the panel (not shown) on the other side in the vehicle width direction forms the passage PW. The other side edge in the vehicle width direction of the back panel 34a on one side in the vehicle width direction forms the opening one side edge portion 35b. The one side edge in the vehicle width direction of the panel on the other side in the vehicle width direction forms the opening other side edge portion (not shown). In other words, the center in the vehicle width direction of the back panel 34 has an opening for the passage PW.

[0030] (Mount bracket 20) Next, the mount bracket 20 will be described with reference to FIG. 2 and FIG. 3. FIG. 3 is a partial perspective view of one side portion in the vehicle width direction, which is a half portion from the center portion in the vehicle width direction to the one side end portion in the vehicle width direction in the vehicle body structure according to the present embodiment, as viewed from an obliquely upward rear of the vehicle. The mount bracket 20 is arranged on one side in the vehicle width direction (+BL direction) of the opening 35. The mount bracket 20 corresponds to the "vehicle width direction one side mount" of the present disclosure. A mount bracket (not shown) is arranged on the other side in the vehicle width direction (-BL direction) of the opening 35. The mount bracket arranged on the other side in the vehicle width direction of the opening 35 corresponds to the "vehicle width direction other side mount" of the present disclosure. The mount bracket 20 arranged on one side in the vehicle width direction and the mount bracket arranged on the other side in the vehicle width direction are arranged symmetrically on the one side in the vehicle width direction and the other side in the vehicle width direction. Hereinafter, the mount bracket 20 arranged on one side in the vehicle width direction will be mainly described, and the mount bracket arranged on the other side in the vehicle width direction will be described in terms of a configuration different from that of the mount bracket 20, and a description of the same configuration will be omitted.

[0031] The mount bracket 20 has a bottom wall portion 22 that is U-shaped in rear view, a first side wall portion 23 extending from an end position of the bottom wall portion 22 on one side in the vehicle width direction (+BL direction) toward the vehicle upper direction (+WL direction), a second side wall portion 24 extending from an end position of the bottom wall portion 22 on the other side in the vehicle width direction (-BL direction) toward the vehicle upper direction, a vehicle front flange 25, and a vehicle rear flange 26. The vehicle front flange 25 is a flange that extends from the end positions of the bottom wall portion 22, the first side wall portion 23, and the other side wall portion 24 on the vehicle front side (-TL direction) toward the inside surrounded by the bottom wall portion 22, the first side wall portion 23, and the other side wall portion 24. The vehicle front flange 25 is fastened to an end portion 14b on the vehicle rear side of the floor underframe 14 by a fastener.

[0032] The vehicle rear flange 26 is a flange extending from the end positions of the vehicle rear side (+TL direction) of each of the bottom wall portion 22, the one side wall portion 23 and the other side wall portion 24 to the outer side opposite the inner side surrounded by each of the bottom wall portion 22, the one side wall portion 23 and the other side wall portion 24.

[0033] An under bracket 27 is disposed at a position lower than the bottom wall portion 22 (in the -WL direction) of the vehicle and higher than the shock absorbing portion 5e (in the +WL direction). The under bracket 27 is fastened to the bottom wall portion 22 and to the shock absorbing portion 5e. As a result, the mount bracket 20 is fastened to the horizontal surface portion 5b via the under bracket 27 and the shock absorbing portion 5e.

[0034] A side bracket 28 is disposed at a position on the other side in the vehicle width direction (-BL direction) of the other side wall portion 24. The side bracket 28 has a first flat portion 28a having a plane perpendicular to the vehicle front-rear direction (TL direction) as a flat surface, and a second flat portion 28b having a plane perpendicular to the vehicle width direction (BL direction) as a flat surface. The first flat portion 28a is fastened to a vehicle rear surface of a vehicle rear flange 26 extending from an end position of the other side wall portion 24 on the vehicle rear side toward the outside (the other side in the vehicle width direction). A connecting portion 52 (described later) is fastened to the second flat portion 28b.

[0035] (Gusset 40A) Next, the gusset 40A will be described. FIG. 4 is a rear view of the gusset as viewed from the rear side of the vehicle. FIG. 5 is a plan view of the gusset as viewed from the upper side of the vehicle. The gusset 40A is formed by joining the vehicle width direction one side frame 40, the vehicle width direction one side panel 51, and the connecting bracket 53 to each other. The gusset 40A is disposed on each of the vehicle width direction one side (+BL direction) and the vehicle width direction other side (-BL direction) of the opening 35. The gusset 40A disposed on the vehicle width direction one side and the gusset (not shown) disposed on the vehicle width direction other side are disposed symmetrically on the vehicle width direction one side and the vehicle width direction other side. Hereinafter, the gusset 40A disposed on the vehicle width direction one side will be mainly described, and the gusset disposed on the vehicle width direction other side will be described in terms of different configurations, and the description of the same configurations will be omitted.

[0036] (Vehicle width direction one side frame 40, vehicle width direction other side frame 40R) Fig. 6 is a partial perspective view of the other side portion in the vehicle width direction, which is half the length from the vehicle width direction center portion to the vehicle width direction other side end portion in the vehicle body structure according to this embodiment, as viewed from diagonally above the rear of the vehicle. As shown in Figs. 3 and 6, the one-side frame 40 in the vehicle width direction and the other-side frame 40R in the vehicle width direction are symmetrically disposed on the one side (+BL direction) and the other side (-BL direction) in the vehicle width direction of the opening 35, respectively.

[0037] The vehicle width direction one side frame 40 has a bent portion 41, a vehicle width direction one side extending portion 42, and a vehicle downward extending portion 43. The vehicle width direction one side frame 40 is manufactured using an iron pipe or a stainless steel pipe. Similarly, the vehicle width direction other side frame 40R has a bent portion 41R, a vehicle width direction other side extending portion 42R, and a vehicle downward extending portion 43R. The vehicle width direction other side frame 40R is manufactured using an iron pipe or a stainless steel pipe. Hereinafter, the vehicle width direction one side frame 40 will be mainly described, and the vehicle width direction other side frame 40R will be described in terms of different configurations, and the description of the same configurations will be omitted.

[0038] (Bending part 41) The bent portion 41 is a portion bent in an L-shape from the vehicle upper direction (+WL direction) toward one side in the vehicle width direction (+BL direction).

[0039] (Vehicle width direction one side extension portion 42) The vehicle width direction one side extending portion 42 extends to one side in the vehicle width direction, which is one of the bent directions. A tip end portion of the vehicle width direction one side extending portion 42 is indirectly connected to the mount bracket 20 via the side bracket 28.

[0040] (Vehicle downward extending portion 43) The vehicle-downward extending portion 43 extends in the other bent direction, that is, in the vehicle-downward direction. A tip end of the vehicle-downward extending portion 43 is fastened to one end of the floor panel reinforcement 13b in the vehicle width direction by a fastener via a connecting bracket 53.

[0041] (Vehicle width direction one side panel 51) The one vehicle width direction panel 51 is a reinforcing part for reinforcing the one vehicle width direction frame 40. The other vehicle width direction panel is a reinforcing part for reinforcing the other vehicle width direction frame. The one vehicle width direction panel 51 and the other vehicle width direction panel are arranged symmetrically to each other on one vehicle width direction side (+BL direction) and the other vehicle width direction side (-BL direction). In the following explanation, the one vehicle width direction panel 51 arranged on one vehicle width direction side will be mainly explained, and the one vehicle width direction panel arranged on the other vehicle width direction side will be explained as follows. The configurations different from those of the panel 51 on one side in the vehicle width direction will be described, and the description of the same configurations will be omitted.

[0042] The vehicle width direction one side panel 51 has a main planar portion 51a, a first minor planar portion 51b, and a second minor planar portion 51c.

[0043] The main planar portion 51a has a plane perpendicular to the vehicle front-rear direction (TL direction). The main planar portion 51a is disposed at a position on the vehicle front side of the one-side frame 40 in the vehicle width direction and at a position on one side in the vehicle width direction (+BL direction) of the vehicle downward extending portion 43. The main planar portion 51a has a bending line L1, and has a vehicle upper portion 51d which is an area above the bending line L1, and a vehicle lower portion 51e which is an area below the bending line L1.

[0044] The upper end 51f of the vehicle upper portion 51d is disposed at a position on the vehicle upper side of the vehicle width direction one side extending portion 42. A through hole 51g is provided at an end on one side of the vehicle width direction of the upper end 51f. The lower end 51h of the vehicle upper portion 51d is disposed at a position on the vehicle lower side of the vehicle width direction one side extending portion 42. A through hole 51j is provided at an end on one side of the vehicle width direction of the lower end 51h. Two through holes 51k are provided at an end on the other side of the vehicle width direction of the vehicle lower portion 51e. The two through holes 51k are disposed apart from each other in the vehicle up-down direction (WL direction). A through hole 51m is provided at an end on one side of the vehicle width direction of the vehicle lower portion 51e. The through hole 51m is disposed at a predetermined distance from the position of the through hole 51j toward the vehicle lower side (-WL direction). The through holes 51g, 51j, 51k, and 51m are pilot holes for fastening the one side panel 51 in the vehicle width direction to the reinforcing bracket 13f.

[0045] The first minor flat portion 51b has a plane extending from the end position of the other side in the vehicle width direction of the vehicle lower portion 51e toward the vehicle rear side (+TL direction). The plane of the first minor flat portion 51b has an elongated outer shape with the direction extending toward the vehicle rear side as the short side direction and the direction along the vehicle downward extending portion 43 as the long side direction. The first minor flat portion 51b is arc welded to the surface of the vehicle downward extending portion 43 opposite to the opening 35 (+BL direction).

[0046] The second sub-plane portion 51c is a plane that is substantially perpendicular to the vehicle width direction (BL direction) and has a substantially rectangular outer shape. The second sub-plane portion 51c extends from an end position on one side of the vehicle width direction of the vehicle upper portion 51d toward the rear side of the vehicle (+TL direction). The second sub-plane portion 51c is arc-welded to the tip of the vehicle width direction one side extending portion 42. The second sub-plane portion 51c corresponds to the "connecting portion" of the present disclosure. The tip of the vehicle width direction one side extending portion 42 is fastened to the plane portion 13g by a fastener via the second sub-plane portion 51c.

[0047] As described above, the first minor planar portion 51b is arc-welded to the vehicle-downward extending portion 43, and the second minor planar portion 51c is arc-welded to the vehicle-width-direction-one-side extending portion 42. This results in a structure in which the vehicle-width-direction-one-side panel 51 is bridged between the vehicle-width-direction-one-side extending portion 42 and the vehicle-width-direction-one-side extending portion 43. In this structure, the vehicle-width-direction-one-side frame 40 and the vehicle-width-direction-one-side panel 51 reinforce each other, thereby making it possible to suppress deformation of each other.

[0048] The joining method for joining the vehicle width direction one side panel 51 and the vehicle width direction one side frame 40 is not limited to arc welding, but may be other welding methods such as laser welding, and is also not limited to the welding method, but may be other joining methods using, for example, connecting fittings.

[0049] (Connecting bracket 53) Next, the connecting bracket 53 will be described with reference to Fig. 3 to Fig. 5. The connecting bracket 53 has a bottom surface portion 53a having a plane perpendicular to the vehicle up-down direction (WL direction) and a wall surface portion 53b having a plane perpendicular to the vehicle front-rear direction (TL direction). The bottom surface portion 53a is arc-welded to the tip of the vehicle downward extending portion 43. The bottom surface portion 53a is fastened to one side end of the floor panel reinforcement 13b in the vehicle width direction by a fastener. The bottom surface portion 53a is provided with a through hole 53c which is a pilot hole for fastening.

[0050] Next, the assembly of the gusset 40A and the cab 10 will be described. As described above, in the gusset 40A arranged on one vehicle width direction side (+BL direction) of the opening 35, the tip of the vehicle width direction one side extension portion 42 is indirectly connected to the mount bracket 20 arranged on the vehicle width direction one side via the side bracket 28. In addition, the tip of the vehicle downward extension portion 43 is indirectly connected to the floor panel reinforcement 13b via the connecting bracket 53. Furthermore, the gusset 40A has a structure in which the vehicle width direction one side frame 40 and the vehicle width direction one side panel 51 reinforce each other.

[0051] Similarly, in the gusset disposed on the other side in the vehicle width direction (-BL direction), the tip of the extension on the other side in the vehicle width direction is indirectly connected to the mount bracket disposed on the other side in the vehicle width direction via a side bracket. Also, the tip of the extension in the vehicle downward direction is indirectly connected to the floor panel reinforcement 13b via a connecting bracket. Furthermore, the gusset has a structure in which the frame on the other side in the vehicle width direction and the panel on the other side in the vehicle width direction reinforce each other.

[0052] Therefore, a connection structure is formed in which the mount bracket 20 arranged on one side in the vehicle width direction and the mount bracket arranged on the other side in the vehicle width direction are connected via the floor panel reinforcement 13b, the gusset 40A arranged on one side in the vehicle width direction of the opening 35 (+BL direction), and the gusset arranged on the other side in the vehicle width direction (-BL direction) of the opening 35. This connection structure makes it possible to ensure the rigidity and strength of the cab 10 against twisting.

[0053] The vehicle body structure 1 in the above embodiment has a floor panel reinforcement 13b arranged on the vehicle underside of a substantially rectangular opening 35 arranged in a back panel 34 of the cab 10, a bent portion 41 bent in an L-shape from the vehicle upper direction toward one side in the vehicle width direction, and further has a vehicle width direction one-side extending portion 42 extending to one side in the vehicle width direction, which is one of the bent directions, and a tip portion of the vehicle width direction one-side extending portion is directly or indirectly connected to a mount bracket 20 arranged on one side in the vehicle width direction of the opening 35, and further has a vehicle downward extending portion 43 extending in the vehicle downward direction, which is the other bent direction, and a tip portion of the vehicle downward extending portion 43 is connected to the floor panel reinforcement 13b. and a vehicle width other-side frame 40R having a bent portion 41R bent in an L-shape from the upper direction of the vehicle toward the other side in the vehicle width direction and further having a vehicle width other-side extending portion 42R extending to the other side in the vehicle width direction, which is one of the bent directions, and a tip portion of the vehicle width other-side extending portion is directly or indirectly connected to a mount bracket 20 arranged on the other side of the vehicle width direction of the opening, and further having a vehicle downward extending portion 43R extending in the vehicle downward direction, which is the other bent direction, and a tip portion of the vehicle downward extending portion 43R is connected to the vehicle width other-side end of the floor panel reinforcement 13b.

[0054] The above configuration forms a connection structure in which the mount bracket 20 arranged on one side in the vehicle width direction and the mount bracket 20 arranged on the other side in the vehicle width direction are connected via the floor panel reinforcement 13b, the one-side frame 40 arranged on one side in the vehicle width direction (+BL direction) of the opening 35, and the other-side frame 40R arranged on the other side in the vehicle width direction (-BL direction) of the opening 35. This connection structure makes it possible to ensure the rigidity and strength of the cab 10 against twisting.

[0055] The vehicle body structure 1 in the above embodiment further includes a vehicle width direction one-side panel 51 that is installed between the vehicle width direction one-side extending portion 42 and the vehicle bottom extending portion 43 so as to reinforce the vehicle width direction one-side frame 40, and a vehicle width direction other-side panel that is installed between the vehicle width direction other-side extending portion 42R and the vehicle bottom extending portion 43R so as to reinforce the vehicle width direction other-side frame 40R. This makes it possible to have a structure in which the vehicle width direction one-side frame 40 and the vehicle width direction one-side panel 51 reinforce each other. Also, it makes it possible to have a structure in which the vehicle width direction other-side frame 40R and the vehicle width direction other-side panel reinforce each other.

[0056] In the vehicle body structure 1 in the above embodiment, the vehicle width direction one side frame 40 and the vehicle width direction one side panel 51 are joined to each other, and the vehicle width direction other side frame 40R and the vehicle width direction other side panel are joined to each other. This makes it possible to assemble them together with a simple configuration. Since the vehicle width direction one side frame 40 and the vehicle width direction one side panel 51 can be handled as a single unit, for example, it is possible to improve the ease of assembly.

[0057] In the vehicle body structure 1 in the above embodiment, the vehicle width direction one-side panel 51 is joined to a surface of the vehicle width direction one-side frame 40 opposite the opening 35, and the vehicle width direction other-side panel is joined to a surface of the vehicle width direction other-side frame 40R opposite the opening 35. By making the joint portion on the opposite side, for example, an edge does not protrude on the opening 35 side, so that safety can be ensured.

[0058] Moreover, in the vehicle body structure 1 in the above embodiment, the one vehicle width direction panel 51 has a connecting portion 52 for directly or indirectly connecting the tip end of the one vehicle width direction extending portion 42 to the mount bracket 20 arranged on one vehicle width direction side of the opening 35, and the other vehicle width direction panel has a connecting portion for directly or indirectly connecting the tip end of the other vehicle width direction extending portion to the mount bracket arranged on the other vehicle width direction side of the opening 35. This eliminates the need to use the connecting portion 52 as a separate part, making it possible to reduce the number of parts and the assembly man-hours.

[0059] In this embodiment, the tip end of the vehicle width direction one side extending portion 42 is indirectly connected to the mount bracket 20 arranged on one side of the opening 35 in the vehicle width direction, but it may also be directly connected.

[0060] In addition, in this embodiment, the present disclosure is shown as being applied to a vehicle body structure in which the cab 10 is fixed to the rear cab mount 5 via the mount bracket 20, but it may also be applied to a cab-tilted vehicle body structure in which the cab 10 is tilted from a normal horizontal position to a forward-inclined position.

[0061] In addition, the above-mentioned embodiments are merely examples of the embodiment of the present disclosure, and the technical scope of the present disclosure should not be interpreted as being limited by them. In other words, the present disclosure can be embodied in various forms without departing from the gist or main features thereof. [Industrial Applicability]

[0062] The present disclosure is preferably used for vehicles having a body structure that requires ensuring the rigidity and strength of the cab against torsion. [Explanation of symbols]

[0063] 1. Body structure 2 Side members 2a Groove upper side wall 2b Groove lower side wall 2c groove bottom wall 3 Cross member 4 Body frame 5 Rear cab mount 5a Vertical section 5b Horizontal part 5c Slope section 5d Flange part 5e Shock absorbing part 5f flat plate 5g Mount rubber 10 Cab 11 Cab body 11a Bottom of the cab body 11b Cab body front part 11c Cab body one side part 11d Rear part of cab body 13 Floor Panel 13a Rear edge of vehicle 13b Floor panel reinforcement 13c Side Panel 13d stepped section 13e wall 13f Reinforcement bracket 13g flat part 14 Floor underframe 14a Front end of vehicle 14b Rear end of vehicle 20 Mounting bracket 22 Bottom wall 23 One side wall 24 Other side wall 25 Vehicle front flange 26 Vehicle rear flange 27 Under bracket 28 Side bracket 28a 1st plane part 28b 2nd plane part 34 Back Panel 34a Vehicle width direction one side back panel 35 Aperture 35a Lower edge of opening 35b One side edge of opening 40A Gusset 40 Vehicle width direction one side frame 40R Other side frame in vehicle width direction 41 Bend section 41R bending part 42 Vehicle width direction one side extension part 42R Other side extension in vehicle width direction 43 Vehicle downward extension 43R Vehicle bottom extension 51 Vehicle width direction one side panel 51a Main plane part 51b 1st sub-plane part 51c 2nd sub-plane part 51d Upper part of the vehicle 51e Lower part of the vehicle 51f Upper end 51g through hole 51h Lower end 51j Through hole 51k through hole 51m through hole 52 Connecting part 53 Connecting bracket 53a Bottom part 53b Wall section 53c through hole

Claims

1. a passageway that is disposed in a vehicle rear side wall of the cabin, the passageway having a substantially rectangular opening that communicates in a vehicle front-rear direction, the passageway connecting the cabin and a luggage compartment that is disposed rearward of the cabin; A vehicle width direction one side mount bracket supported from below by a cab mount arranged on one side in the vehicle width direction; a vehicle width direction other side mount bracket supported from below by a cab mount arranged on the vehicle width direction other side; an opening lower frame that configures an edge of the opening on a vehicle lower side; An opening vehicle width direction one side edge portion constituting an edge of the opening on one side in the vehicle width direction; an opening vehicle width direction other side edge portion constituting an edge of the opening on the vehicle width direction other side; a vehicle width direction one side frame having a first bent portion; a frame on another side in the vehicle width direction having a second bent portion; Equipped with The vehicle width direction one side frame further has a tip portion extending from the first bent portion to the vehicle width direction one side and directly or indirectly connected to the opening vehicle width direction one side edge portion and the vehicle width direction one side mount bracket, and further has a tip portion extending from the first bent portion toward the bottom of the vehicle connected to the vehicle width direction one side end portion of the opening lower frame, The vehicle width direction other side frame further has a tip portion extending from the second bent portion to the vehicle width direction other side, which is directly or indirectly connected to the opening vehicle width direction other side edge portion and the vehicle width direction other side mount bracket, and further has a tip portion extending from the second bent portion toward the bottom of the vehicle connected to the vehicle width direction other side end portion of the opening lower frame. Body structure.

2. Each of the first bent portion and the second bent portion is bent into an L shape. The vehicle body structure according to claim 1 .

3. a vehicle width direction one side panel that is spanned between a vehicle width direction one side extending portion that extends from the first bent portion to one side in the vehicle width direction and a vehicle downward extending portion that extends from the first bent portion in the vehicle downward direction so as to reinforce the vehicle width direction one side frame; a vehicle width direction other-side panel that is spanned between a vehicle width direction other-side extending portion that extends from the second bent portion to the vehicle width direction other side and a vehicle downward extending portion that extends from the second bent portion in a vehicle downward direction so as to reinforce the vehicle width direction other-side frame; Further comprising: The vehicle body structure according to claim 1 or 2.

4. The vehicle width direction one side frame and the vehicle width direction one side panel are joined to each other, The vehicle width direction other side frame and the vehicle width direction other side panel are joined to each other. The vehicle body structure according to claim 3.

5. The vehicle width direction one side panel is joined to a surface of the vehicle width direction one side frame opposite to the opening, The vehicle width direction other side panel is joined to a surface of the vehicle width direction other side frame opposite to the opening. The vehicle body structure according to claim 4.

6. the vehicle width direction one side panel has a connecting portion for directly or indirectly connecting the tip portion extending from the first bent portion to the vehicle width direction one side mount of the opening, the other-side panel in the vehicle width direction has a connecting portion for directly or indirectly connecting the tip portion extending from the second bent portion to the other-side mount in the vehicle width direction of the opening, The vehicle body structure according to claim 3.

7. The opening lower frame is disposed along the floor surface of the passage, The vehicle width direction one side frame is disposed on one side of the passage in the vehicle width direction, The vehicle width direction other side frame is disposed on the vehicle width direction other side of the passage. The vehicle body structure according to claim 1 .

Images