Frame vehicle body structure

Abstract

A vehicle body structure for a frame vehicle (1) according to the present disclosure comprises: a frame (2) that includes a pair of left and right side members (3) which extend in the vehicle front-rear direction; and a cabin (8) installed above the frame (2), wherein the cabin (8) has a pair of left and right side sills (10) that are disposed in the vehicle width direction on the outer sides of the respective side members (3) so as to face each other and a floor panel (11) that is connected in the vehicle width direction between the side sills (10). The vehicle body structure according to the present disclosure is provided with: stopper members (7) that are attached to the outer side surfaces in the vehicle width direction of the side members (3); and stopper receiving members (9) that are disposed on the vehicle front sides or vehicle rear sides of the stopper members (7) and that are attached to the cabin (8) over the borders between the floor panel (11) and the side sills (10).

Description

[Technical Field]

[0001] This case relates to the body structure of a frame vehicle. [Background technology]

[0002] In a conventional frame vehicle in which the body (cabin) is installed on top of the frame, a structure for absorbing impact during a vehicle collision has been applied between the frame and the body. For example, a structure has been proposed in which brackets (stopper portions) are fixed to the sides of the side members, and brackets (stopper receiving portions) and crash boxes are fixed to the sides of the side sills, and these are arranged facing each other in the fore-and-aft direction of the vehicle (see Patent Document 1). With this structure, the crash boxes are crushed in the event of a vehicle collision, thereby absorbing the impact. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-078660 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described shock-absorbing structure, the relative displacement between the frame and the cabin increases as the crash boxes are crushed during a vehicle collision. This raises concerns about damage to the mounts that support the body on the frame and the possibility of the body falling off. To address this issue, it is conceivable to reduce the relative displacement between the frame and the body by reducing the deformation allowance of the crash boxes or even eliminating the crash boxes entirely. However, in this case, the impact load during a vehicle collision tends to be concentrated around the brackets, making it difficult to ensure the required rigidity and strength.

[0005] One of the objects of the present invention, which was invented in light of the above-mentioned problems, is to provide a body structure for a frame vehicle that can improve shock-absorbing performance against external forces with a simple configuration. However, in addition to this object, another object of the present invention is to achieve effects derived from the respective configurations shown in the "Description of Embodiments" below, which cannot be obtained with conventional technology. [Means for solving the problem]

[0006] The disclosed frame vehicle body structure can be realized as the following disclosed aspects or application examples, and solves at least some of the above-mentioned problems. The disclosed body structure of a frame vehicle comprises a frame including a pair of left and right side members extending in the fore-and-aft direction of the vehicle, and a cabin installed on the upper part of the frame, the cabin having a pair of left and right side sills arranged opposite each other on the outer side of the vehicle width direction for each of the side members, and a floor panel connecting the side sills in the vehicle width direction. first The vehicle body structure includes a stopper member attached to an outer surface of the side member in the vehicle width direction, and a stopper receiving member attached to the cabin so as to straddle the side sill and the floor panel, and disposed in front of or behind the stopper member. a reinforcing member provided inside the stopper receiving member and reinforcing the stopper receiving member; Equipped with. The stopper receiving member has a box-like shape having a front side surface that forms an end surface at the front of the vehicle, a rear side surface that forms an end surface at the rear of the vehicle, a lower end surface that forms a lower end surface, and an inner side surface that forms an end surface on the inner side in the vehicle width direction. The reinforcing member is formed in a plane shape that follows the lower end surface of the stopper receiving member and is joined to the lower surface of the side sill. The second vehicle body structure includes a stopper member attached to the outer surface of the side member in the vehicle width direction, a stopper receiving member attached to the cabin so as to straddle the side sill and the floor panel and positioned in front of or behind the stopper member, a side step fixed to the side sill and extending from the side sill outward in the vehicle width direction, and a connecting member connecting the stopper receiving member and the side step. [Effects of the Invention]

[0007] According to the disclosed frame vehicle body structure, by attaching the stopper receiving member so that it straddles the side sill and the floor panel, the load transmitted from the stopper member to the stopper receiving member can be efficiently distributed and transmitted to the cabin. This makes it possible to suppress damage to the stopper member and the stopper receiving member and deformation around the members, and improves cushioning performance against external forces with a simple configuration. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is an exploded perspective view illustrating the body structure of a frame vehicle. [Figure 2] FIG. 2 is a bottom view of the body structure of the frame vehicle. [Figure 3] FIG. 4 is a perspective view showing the structure around the stopper member. [Figure 4] FIG. 4 is a perspective view showing the structure surrounding the stopper receiving member. [Figure 5] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] The disclosed body structure of a frame vehicle can be implemented according to the following embodiments. Regarding the definitions of directions in the embodiments, the front-rear direction is defined based on the forward and backward direction of the vehicle, and the left-right direction (vehicle width direction) is defined based on the front-rear direction. The up-down direction is defined based on the state in which the vehicle is stopped on a flat road surface. Furthermore, with the center of the frame vehicle's width direction as the reference, the directions toward the left and right sides are also called outboard directions, and the opposite directions (directions from the left and right sides of the frame vehicle toward the center of the vehicle width direction) are also called inboard directions. [Example]

[0010] [1. Configuration] Fig. 1 is an exploded perspective view showing a schematic view of the body structure of a frame vehicle 1 according to an embodiment, and Fig. 2 is a bottom view of the body structure. The frame vehicle 1 comprises a frame 2 and a cabin 8 installed on top of the frame 2. The frame 2 is a structural member that forms the framework of the frame vehicle 1, and includes at least a pair of left and right side members 3 extending in the longitudinal direction. The cabin 8 is a body that constitutes at least the passenger compartment or luggage compartment of the frame vehicle 1, and is mounted on the frame 2 via a plurality of cabin mounts 5. The cabin mounts 5 are shock absorbers that reduce vibrations and shocks transmitted to the cabin 8, and are, for example, rubber mounts or viscous mounts.

[0011] The side members 3 are members extending in the longitudinal direction over almost the entire length of the frame vehicle 1 from the front end to the rear end, and are provided in pairs spaced apart in the vehicle width direction. The cross-sectional shape of the side members 3 is formed, for example, into a closed cross-sectional shape (circular, rectangular, etc.) or a U-shape (groove, channel shape). The pair of side members 3 are formed so as to have an almost bilaterally symmetrical shape across the entire frame vehicle 1. The distance between the pair of side members 3 can be widened or narrowed depending on the shape of the cabin 8 and the layout of various on-board devices.

[0012] The frame 2 shown in Figures 1 and 2 is a ladder frame formed by connecting a pair of side members 3 and a cross member 4 in a ladder-like shape. The frame 2 is arranged so that its longitudinal direction corresponds to the fore-and-aft direction of the frame vehicle 1. The cross members 4 are members that connect the pair of side members 3 in the vehicle width direction, and are provided at multiple locations, for example, spaced apart in the fore-and-aft direction. The cross member 4 has a cross-sectional shape that is, for example, a closed cross-sectional shape or a U-shape, similar to the side members 3.

[0013] Mount brackets 6 that support the lower part of the cabin mount 5 are fixed to the side members 3. The position of the mount brackets 6 is set, for example, according to the layout of the cabin mount 5, so that the load of the cabin 8 is appropriately transmitted to the frame 2. The mount brackets 6 shown in Figures 1 and 2 are fixed to the outer surfaces of the side members 3 in the vehicle width direction. The number of cabin mounts 5 and mount brackets 6 is, for example, four or more, an even number. If the cabin mount 5 can be fixed onto the side members 3 or the cross members 4, the mount brackets 6 may be omitted.

[0014] A pair of left and right side sills 10 and a planar floor panel 11 connecting them in the vehicle width direction are provided below the cabin 8. The side sills 10 are members that form thresholds for the entrance and exit, and are arranged in the vehicle front-rear direction on each of the left and right sides of the cabin 8 along the lower edge of the side door opening. The cross-sectional shape of the side sills 10 is formed, for example, into a closed cross-sectional shape or a U-shape.

[0015] The floor panel 11 is a member that forms the floor surface of the passenger compartment or luggage compartment. The floor panel 11 may be formed with ribs or grooves to increase strength and rigidity, for example. A floor cloth 12, which is a reinforcing member, is attached to the underside of the floor panel 11 shown in Figures 1 and 2. The floor cloth 12 is arranged to connect a pair of side sills 10 in the vehicle width direction. The cross-sectional shape of the floor cloth 12 is formed, for example, in a closed cross-sectional shape or a U-shape. The floor cloth 12 is a portion that is supported by the cabin mounts 5. Note that a tunnel structure (a portion that protrudes upward in the center of the vehicle width direction, a backbone structure) may be applied near the center of the frame vehicle 1 in the vehicle width direction to accommodate drive system devices (propeller shaft, exhaust pipe, etc.), piping materials (fuel pipe, etc.), and wiring materials (wire harness, etc.) under the floor.

[0016] A side step 13 is fixed to the outer side of the side sill 10 in the vehicle width direction. The side step 13 extends from the side sill 10 toward the outer side in the vehicle width direction. The side step 13 can be used as a foothold for occupants when getting in and out of the vehicle through the entrance / exit door, and also has the effect of reducing air resistance while driving and improving the aesthetic appearance of the side of the vehicle. The side step 13 in this embodiment is made of resin or metal, and is fixed to each of the left and right side sills 10 via fasteners, clips, etc. (not shown).

[0017] [2. Stopper member and stopper receiving member] As shown in Figures 1 and 2, a stopper member 7 is attached to the outer surface of the side member 3 in the vehicle width direction. In addition, a stopper receiving member 9 is attached to the cabin 8. The stopper receiving member 9 is attached to the cabin 8 so as to straddle a side sill 10 and a floor panel 11, and is disposed in front of or behind the stopper member 7. The stopper receiving member 9 shown in Figures 1 and 2 is disposed behind the stopper member 7 with a predetermined distance therebetween, but the positional relationship between the stopper member 7 and the stopper receiving member 9 may be reversed, or multiple stopper members 7 and stopper receiving members 9 may be arranged alternately in the front-to-rear direction of the vehicle.

[0018] The stopper member 7 and the stopper receiving member 9 are provided on at least one of the right and left sides of the frame vehicle 1, and preferably a pair on the left and right. The stopper member 7 is provided on the outer surface in the vehicle width direction that faces the side sill 10 in the vehicle width direction, and is disposed at a distance from both the stopper receiving member 9 and the side sill 10. Similarly, the stopper receiving member 9 is provided on the inner surface in the vehicle width direction that faces the side member 3 in the vehicle width direction, and is disposed at a distance from both the stopper member 7 and the side member 3.

[0019] Here, we will explain the functions and actions of the stopper member 7 and the stopper receiving member 9. When an external force acts on the frame 2 from the front of the frame 2 during a vehicle frontal collision, the frame 2 moves rearward relative to the cabin 8, and the stopper member 7 comes into contact with the stopper receiving member 9. At this time, the stopper receiving member 9 acts to prevent the stopper member 7 from moving rearward, thereby suppressing the frame 2 from moving rearward relative to the cabin 8.

[0020] This significantly reduces the injury value (an index value that indicates the degree of damage to a dummy in a vehicle safety performance evaluation test) in the frame vehicle 1. Also, since the relative displacement of the frame 2 with respect to the cabin 8 is reduced, the load on the cabin mount 5 is alleviated. This prevents, for example, deformation or breakage of the cabin mount 5, and reduces the possibility of the cabin 8 separating or falling off.

[0021] On the other hand, if an external force acts on the cabin 8 from outside the side sill 10 during a vehicle side collision, the cabin 8 moves inward in the vehicle width direction relative to the frame 2, causing the stopper member 7 to come into contact with the side sill 10 and the stopper receiving member 9 to come into contact with the side member 3. At this time, the stopper member 7 acts to prevent the side sill 10 from moving inward in the vehicle width direction, thereby suppressing deformation of the cabin 8. At the same time, the side member 3 acts to prevent the stopper receiving member 9 from moving inward in the vehicle width direction, further suppressing deformation of the cabin 8. This makes it easier to ensure space in the passenger compartment and luggage compartment, significantly reducing injury scores.

[0022] Furthermore, if an external force acts on the cabin 8 from behind during a rear-end collision, the cabin 8 moves forward relatively to the frame 2, and the stopper receiving member 9 comes into contact with the stopper member 7. At this time, the stopper member 7 acts to prevent the stopper receiving member 9 from moving forward, thereby suppressing the cabin 8 from moving forward relative to the frame 2. This significantly reduces the injury value. In addition, the fuel filler hose is prevented from falling off or being deformed or damaged as the cabin 8 moves forward.

[0023] The specific structures of the stopper member 7 and the stopper receiving member 9 in this embodiment will now be described. Fig. 3 is a perspective view of the stopper member 7 attached to the left side member 3. The stopper member 7 is formed in a box shape and is fixed by welding to an upper surface 14 and an outer surface 15 of the side member 3. The stopper member 7 is provided with a front surface 16 (front side surface), a rear surface 17 (rear side surface), an outer surface 18 (outer surface), a lower surface 19 (lower end surface), and an upper surface 20 (upper end surface). These five surfaces and the outer surface 15 of the side member 3 form a substantially box-shaped closed space.

[0024] The front surface portion 16 is a surface that forms the front end face of the stopper member 7, and the rear surface portion 17 is a surface that forms the rear end face of the stopper member 7. The rear surface portion 17 is an opposing surface that is disposed opposite a front side surface 36 of a stopper receiving member 9, which will be described later. Each of the front surface portion 16 and the rear surface portion 17 is disposed approximately perpendicular to the outer surface 15, with the normal line pointing in the fore-and-aft direction of the vehicle.

[0025] The front surface portion 16 is provided with a front flange portion 21 extending forward from its inner edge in the vehicle width direction, and the rear surface portion 17 is provided with a rear flange portion 22 extending rearward from its inner edge in the vehicle width direction. The front flange portion 21 and the rear flange portion 22 are fixed to the outer surface 15 by, for example, fillet welding (arc welding) while in surface contact with the outer surface 15.

[0026] The outer surface portion 18 is a surface that forms the outer end face of the stopper member 7 and connects the outer edges of the front surface portion 16 and the rear surface portion 17. The outer surface portion 18 is provided approximately parallel to the outer surface 15. As a result, the outer surface portion 18 becomes a surface that faces and is approximately parallel to the inner surface 32 of the side sill 10, which will be described later.

[0027] The lower surface portion 19 is a portion that forms the lower surface of the stopper member 7, and is formed in a flat shape that slopes from the lower end edge of the outer surface portion 18 toward the outer surface 15. The slope of the lower surface portion 19 is set, for example, so that the normal to the slope faces downward and outward from the vehicle. The lower surface portion 19 is provided with a lower flange portion 23 that extends downward from its inner edge in the vehicle width direction. The lower flange portion 23 is fixed to the outer surface 15 by, for example, fillet welding, while being in surface contact with the outer surface 15.

[0028] Upper surface portion 20 is a portion that forms the upper surface of stopper member 7, and is formed in a flat shape that extends from the upper end edge of outer surface portion 18 toward the inside in the vehicle width direction. Upper surface portion 20 is disposed so as to be substantially flush with upper surface 14 of side member 3, and is fixed to upper surface 14. Upper surface portion 20 is provided with an upper flange portion 24 that forms a portion near the inner end edge in the vehicle width direction. That is, unlike front flange portion 21, rear flange portion 22, and lower flange portion 23, upper flange portion 24 is provided so as to be substantially flush with upper surface portion 20 (without being bent relative to upper surface portion 20). Upper flange portion 24 is fixed to upper surface 14 by, for example, fillet welding, while being in surface contact with upper surface 14.

[0029] 3, the upper ends of the front surface portion 16 and the rear surface portion 17 are formed in a shape that protrudes upward more than the upper surface portion 20. The lower ends of the front surface portion 16 and the rear surface portion 17 are formed in a shape that protrudes downward more than the lower surface portion 19. This increases the contact area when the stopper member 7 and the stopper receiving member 9 come into contact with each other, and the load is transmitted between the frame 2 and the cabin 8 more reliably.

[0030] FIG. 4 is a perspective view of the stopper receiving member 9 attached to the left side sill 10, and FIG. 5 is an exploded perspective view thereof. The stopper receiving member 9 is formed in a box shape and is welded to the underside 31 of the floor panel 11 and the inner side surface 32 and underside 33 of the side sill 10. As shown in FIGS. 4 and 5, the stopper receiving member 9 has a front side surface 36, a rear side surface 37, a bottom end surface 38, and an inner side surface 39. These four surfaces, the underside 31 of the floor panel 11, and the inner side surface 32 of the side sill 10 form a substantially box-shaped closed space. A reinforcing member 50 is provided inside the stopper receiving member 9, and a connecting member 60 is provided below the stopper receiving member 9.

[0031] The front side surface 36 is a surface that forms the front end surface of the stopper receiving member 9 and is a surface that can come into surface contact with the rear surface portion 17 of the stopper member 7 in the event of a vehicle frontal collision, for example. The front side surface 36 is provided approximately perpendicular to the inner side surface 32 and is arranged so that its normal line faces the fore-and-aft direction of the vehicle. The rear side surface 37 is a surface that forms the rear end surface of the stopper receiving member 9 and is arranged approximately parallel to the front side surface 36.

[0032] The lower end surface 38 is a surface that forms the lower end surface of the stopper receiving member 9, and is formed in a planar shape that connects the lower end edges of the front side surface 36 and the rear side surface 37. The lower end surface 38 is provided approximately parallel to the lower surface 31 of the floor panel 11. The inner side surface 39 is a surface that forms the inner end surface of the stopper receiving member 9 in the vehicle width direction, and is formed in a planar shape that connects the inner end edges of the front side surface 36 and the rear side surface 37 in the vehicle width direction, and is also connected to the inner end edge of the lower end surface 38 in the vehicle width direction. The inner side surface 39 is provided approximately parallel to the inner side surface 32. As a result, the inner side surface 39 becomes a surface that faces the outer side surface 15 of the side member 3 in an approximately parallel manner.

[0033] The front side surface 36 is provided with a first flange portion 41 and a second flange portion 42. The first flange portion 41 is a planar portion that extends forward from the inner edge of the front side surface 36 in the vehicle width direction and is joined to the inner surface 32 of the side sill 10. The first flange portion 41 is in surface contact with the inner surface 32 and is fixed to the inner surface 32 by, for example, spot welding. The second flange portion 42 is a planar portion that extends forward from the upper end edge of the front side surface 36 and is joined to the underside 31 of the floor panel 11. The second flange portion 42 is in surface contact with the underside 31 and is fixed to the underside 31 by, for example, spot welding.

[0034] The rear side surface 37 is provided with a third flange portion 43 and a fourth flange portion 44. The third flange portion 43 is a planar portion that extends rearward from the inner edge of the rear side surface 37 in the vehicle width direction and is joined to the inner surface 32 of the side sill 10. The third flange portion 43 is fixed to the inner surface 32 by spot welding, for example, while in surface contact with the inner surface 32. The fourth flange portion 44 is a planar portion that extends rearward from the upper edge of the rear side surface 37 and is joined to the underside 31 of the floor panel 11. The fourth flange portion 44 is fixed to the underside 31 by spot welding, for example, while in surface contact with the underside 31.

[0035] The lower end surface 38 is provided with a fifth flange portion 45 extending from its outer edge in the vehicle width direction. Unlike the other flange portions 41 to 44, 46, the fifth flange portion 45 is provided so as to be substantially flush with the lower end surface 38 (without being bent relative to the lower end surface 38). The fifth flange portion 45 is provided substantially horizontally along the lower surface 33 of the side sill 10 and is fixed to the lower surface 33 by, for example, spot welding. In addition, the inner surface 39 is provided with a sixth flange portion 46 extending from its upper edge toward the inside in the vehicle width direction. The sixth flange portion 46 is fixed to the lower surface 31 of the floor panel 11 by, for example, spot welding, while being in surface contact with the lower surface 31.

[0036] The reinforcing member 50 is provided inside the stopper receiving member 9 and reinforces the stopper receiving member 9. The reinforcing member 50 is preferably provided so as to straddle the stopper receiving member 9 and the side sill 10. The reinforcing member 50 is preferably formed in a plane shape that conforms to the lower end surface 38 of the stopper receiving member 9 and is joined to the lower surface 33 of the side sill 10. For example, as shown in FIG. 5 , the reinforcing member 50 is provided with a first reinforcing flange portion 51, a second reinforcing flange portion 52, a third reinforcing flange portion 53, a fourth reinforcing flange portion 54, and a reinforcing surface portion 55. The reinforcing surface portion 55 is a flat portion that is disposed on the lower end surface 38 of the stopper receiving member 9 and is formed in a plane shape that conforms to the lower end surface 38. The reinforcing surface portion 55 is preferably provided inside the stopper receiving member 9 in a state of surface contact with the lower end surface 38.

[0037] The first reinforcing flange portion 51 is a planar portion that extends upward from the front end edge of the reinforcing surface portion 55 and is joined to the front side surface 36 of the stopper receiving member 9. The first reinforcing flange portion 51 is fixed to the front side surface 36 by, for example, spot welding, while being in surface contact with the inner side of the front side surface 36. Similarly, the second reinforcing flange portion 52 is a planar portion that extends upward from the rear end edge of the reinforcing surface portion 55 and is joined to the rear side surface 37 of the stopper receiving member 9. The second reinforcing flange portion 52 is fixed to the rear side surface 37 by, for example, spot welding, while being in surface contact with the inner side of the rear side surface 37.

[0038] The third reinforcing flange portion 53 is a flat portion that extends upward from the inner end edge of the reinforcing surface portion 55 in the vehicle width direction and is joined to the inner surface 39 of the stopper receiving member 9. The third reinforcing flange portion 53 is fixed to the inner surface 39 by, for example, spot welding, in a state of surface contact with the inside of the inner surface 39.

[0039] The fourth reinforcing flange portion 54 is a portion of the reinforcing surface portion 55 near the outer edge in the vehicle width direction. Unlike the other flange portions 51 to 53, the fourth reinforcing flange portion 54 of this embodiment is provided so as to be substantially flush with the reinforcing surface portion 55 (without being bent relative to the reinforcing surface portion 55). The fourth reinforcing flange portion 54 is provided substantially horizontally along the underside 33 of the side sill 10 and is fixed to the underside 33 by, for example, spot welding. Preferably, the underside 33 of the side sill 10, the fifth flange portion 45 of the stopper receiving member 9, and the fourth reinforcing flange portion 54 of the reinforcing member 50 are welded and fixed together in a three-layer configuration. The fourth reinforcing flange portion 54 may be bent relative to the reinforcing surface portion 55, or the fourth reinforcing flange portion 54 may be fixed to the inner surface 32 of the side sill 10.

[0040] The connecting member 60 is provided below the stopper receiving member 9 and is a member that connects the stopper receiving member 9 and the side step 13. As shown in Fig. 5, the connecting member 60 is provided with a first surface portion 61, a second surface portion 62, a third surface portion 63, a front connecting flange portion 64, and a rear connecting flange portion 65. The overall shape of the connecting member 60 is crank-shaped when viewed from the front of the vehicle, and is shaped like an ascending staircase from the outer side in the vehicle width direction toward the inner side in the vehicle width direction.

[0041] The first surface portion 61 is a portion that supports the lower end surface 38 of the stopper receiving member 9, and is formed in a flat shape that is in surface contact with the lower end surface 38. The first surface portion 61 may be fastened and fixed to the lower end surface 38, for example, via a fastener (not shown), or may be fixed by fillet welding or spot welding. The third surface portion 63 is a portion that supports the lower surface 35 of the side step 13, and is formed in a flat shape that is in surface contact with the lower surface 35. The third surface portion 63 may be fastened and fixed to the lower surface 35 using a fastener (not shown), for example, or may be fixed to the lower surface 35 by fillet welding or spot welding.

[0042] The second surface portion 62 is a portion that connects the first surface portion 61 and the third surface portion 63. The second surface portion 62 may be formed in a flat shape that makes surface contact with the inner surface 34 of the side step 13. Alternatively, the second surface portion 62 may be formed in a curved shape that smoothly connects the first surface portion 61 and the third surface portion 63. Furthermore, the second surface portion 62 may be fastened and fixed to the inner surface 34 using a fastener (not shown), for example, or may be fixed to the inner surface 34 by fillet welding or spot welding.

[0043] The front connection flange 64 is an edge formed by bending the front end edges of the first surface 61, the second surface 62, and the third surface 63 approximately perpendicularly to the respective surfaces. Similarly, the rear connection flange 65 is an edge formed by bending the rear end edges of the first surface 61, the second surface 62, and the third surface 63 approximately perpendicularly to the respective surfaces. By providing these front connection flange 64 and rear connection flange 65, the rigidity of the connecting member 60 is sufficiently ensured.

[0044] [3. Actions and Effects] (1) The body structure of the frame vehicle 1 of this embodiment includes a stopper member 7 and a stopper receiving member 9. The stopper member 7 is attached to the outer surface of the side member 3 in the vehicle width direction. The stopper receiving member 9 is attached to the cabin 8 so as to straddle the side sill 10 and the floor panel 11, and is disposed in front of or behind (rear in this embodiment) the stopper member 7. By attaching the stopper receiving member 9 so as to straddle the side sill 10 and the floor panel 11, it is possible to improve the cushioning performance against external forces with a simple configuration.

[0045] For example, in the event of a frontal vehicle collision, the load transmitted from the stopper member 7 to the stopper receiving member 9 can be efficiently dispersed and transmitted to the cabin 8. This makes it possible to suppress damage to the stopper member 7 and the stopper receiving member 9 and deformation around the members. Furthermore, in the event of a side vehicle collision, the load can be reliably transmitted from the stopper receiving member 9 to the side member 3, suppressing deformation of the cabin 8. The stopper member 7 and the stopper receiving member 9 act to fill the gap between the side member 3 and the side sill 10. Therefore, compared to a structure without the stopper member 7 and the stopper receiving member 9, the cabin 8 is less likely to be crushed in the vehicle width direction. Even in the event of a rearward vehicle collision, the increased rigidity of the stopper receiving member 9 allows the stopper member 7 to more reliably prevent the stopper receiving member 9 from moving rearward.

[0046] (2) In this embodiment, the stopper receiving member 9 is disposed behind the stopper member 7. With this configuration, when an external force acts on the frame 2 during a vehicle frontal collision, the stopper member 7 can be caused to collide with the stopper receiving member 9, thereby more reliably suppressing the rearward movement of the frame 2. In addition, the relative displacement of the frame 2 with respect to the cabin 8 can be more reliably reduced, preventing deformation or breakage of the cabin mount 5.

[0047] (3) As shown in Figures 4 and 5, the stopper receiving member 9 of this embodiment has a box-like shape having a front side surface 36 forming the front end surface, a rear side surface 37 forming the rear end surface, a lower end surface 38 forming the lower end surface, and an inner side surface 39 forming the inner end surface in the vehicle width direction. With this configuration, a box-like closed space (i.e., a space closed on all six sides, top, bottom, left, right, front, and rear) can be formed between the lower surface 31 of the floor panel 11 and the inner surface 32 of the side sill 10. Therefore, the rigidity of the stopper receiving member 9 can be increased with a simple configuration, and the shock-absorbing performance of the frame vehicle 1 can be improved.

[0048] (4) The stopper receiving member 9 of this embodiment has a first flange portion 41, a second flange portion 42, a third flange portion 43, and a fourth flange portion 44. The first flange portion 41 extends from the front side surface 36 and is joined to the inner surface 32 of the side sill 10 in the vehicle width direction. The second flange portion 42 extends from the front side surface 36 and is joined to the underside 31 of the floor panel 11. The third flange portion 43 extends from the rear side surface 37 and is joined to the inner surface 32 of the side sill 10 in the vehicle width direction. The fourth flange portion 44 extends from the rear side surface 37 and is joined to the underside 31 of the floor panel 11. This allows the stopper receiving member 9, the side sill 10, and the floor panel 11 to be stably and firmly fixed together. Furthermore, the load transmitted from the stopper member 7 to the stopper receiving member 9 during a vehicle frontal collision can be efficiently distributed. This further improves the shock-absorbing performance of the frame vehicle 1.

[0049] (5) The stopper receiving member 9 of this embodiment has a fifth flange portion 45 that extends from the lower end surface 38 and is joined to the lower surface 33 of the side sill 10. This allows the stopper receiving member 9 to be more firmly fixed to the side sill 10, preventing the stopper receiving member 9 from peeling off from the cabin 8 in the event of a collision between the stopper member 7 and the stopper receiving member 9. In addition, the load transmitted in the event of a frontal collision of the vehicle can be efficiently dispersed. Therefore, the shock-absorbing performance of the frame vehicle 1 can be further improved.

[0050] (6) The stopper receiving member 9 of this embodiment has a sixth flange portion 46 that extends from the inner surface 39 and is joined to the underside 31 of the floor panel 11. This allows the stopper receiving member 9 to be more firmly fixed to the side sill 10, preventing the stopper receiving member 9 from peeling off from the cabin 8 in the event of a collision between the stopper member 7 and the stopper receiving member 9. In addition, the load transmitted in the event of a frontal collision of the vehicle can be efficiently dispersed. Therefore, the shock-absorbing performance of the frame vehicle 1 can be further improved.

[0051] (7) A reinforcing member 50 that reinforces the stopper receiving member 9 is provided inside the stopper receiving member 9 of this embodiment. This increases the rigidity of the stopper receiving member 9, making it less likely to deform. Therefore, the shock-absorbing performance of the frame vehicle 1 can be further improved.

[0052] (8) The reinforcing member 50 of this embodiment is provided so as to straddle the stopper receiving member 9 and the side sill 10. This allows an impact on the stopper receiving member 9 to be transmitted to the side sill 10 via the reinforcing member 50. This further improves the shock-absorbing performance of the frame vehicle 1. The reinforcing member 50 may be joined to the inner surface 32 of the side sill 10 or to the lower surface 33 of the side sill 10.

[0053] (9) The reinforcing member 50 of this embodiment is formed in a planar shape that conforms to the lower end surface 38 of the stopper receiving member 9 and is joined to the underside of the side sill 10. This prevents deformation of the connecting portion between the stopper receiving member 9 and the side sill 10, while efficiently transmitting impact to the stopper receiving member 9 to the side sill 10 via the reinforcing member 50. This further improves the shock-absorbing performance of the frame vehicle 1.

[0054] (10) In this embodiment, the lower surface 33 of the side sill 10, the reinforcing member 50, and the fifth flange portion 45 of the stopper receiving member 9 can be welded together in three layers. With this configuration, not only the lower end surface 38 of the stopper receiving member 9 but also the joint portion between the stopper receiving member 9 and the side sill 10 can be efficiently reinforced. Therefore, the shock-absorbing performance of the frame vehicle 1 can be further improved.

[0055] (11) The reinforcing member 50 of this embodiment has a first reinforcing flange portion 51, a second reinforcing flange portion 52, and a third reinforcing flange portion 53. The first reinforcing flange portion 51 extends from a reinforcing surface portion 55 that is arranged along the lower end surface 38 of the stopper receiving member 9, and is joined to the front side surface 36 of the stopper receiving member 9. The second reinforcing flange portion 52 extends from the reinforcing surface portion 55 and is joined to the rear side surface 37 of the stopper receiving member 9. The third reinforcing flange portion 53 extends from the reinforcing surface portion 55 and is joined to the inner side surface 39 of the stopper receiving member 9. With this configuration, the entire lower end surface 38 can be efficiently reinforced, and the shock-absorbing performance of the frame vehicle 1 can be further improved.

[0056] (12) The vehicle body structure of this embodiment is provided with a side step 13 and a connecting member 60. The side step 13 is fixed to the side sill 10 and extends outward from the side sill 10 in the vehicle width direction. The connecting member 60 connects the stopper receiving member 9 and the side step 13. This configuration can stabilize the fixed state of the side step 13. Furthermore, it can efficiently distribute the external force input to the side step 13 during a vehicle side collision to the side sill 10 and floor panel 11. Therefore, deformation of the cabin 8 can be suppressed, and the shock-absorbing performance of the frame vehicle 1 can be further improved.

[0057] (13) The stopper member 7 of this embodiment has a box-like shape having a front surface 16 (front side) that forms the end surface at the front of the vehicle, a rear surface 17 (rear side) that forms the end surface at the rear of the vehicle, a lower surface 19 (lower end surface) that forms the lower end surface, and an outer surface 18 (outer surface) that forms the end surface on the outer side in the vehicle width direction. Furthermore, the front surface 16 (front side) or the rear surface 17 (rear side) of the stopper member 7 is disposed opposite the stopper receiving member 9. This configuration increases the rigidity of the stopper member 7 with a simple configuration. Furthermore, for example, in the event of a frontal collision, the stopper member 7 and the stopper receiving member 9 can be brought into surface contact, allowing for more reliable load transmission. Therefore, the shock-absorbing performance of the frame vehicle 1 can be further improved.

[0058] (14) The stopper member 7 of this embodiment has an upper surface portion 20 that is fixed to the upper surface 14 of the side member 3. As shown in FIG. 3 , the front surface portion 16 (front side surface) of the stopper member 7 and the rear surface portion 17 (rear side surface) of the stopper member 7 are formed in a shape that protrudes upward from the upper surface portion 20. This configuration can improve the shape stability of the stopper member 7. Also, for example, the contact area between the stopper member 7 and the stopper receiving member 9 during a vehicle frontal collision can be increased, allowing for more reliable load transmission. Therefore, the shock-absorbing performance of the frame vehicle 1 can be further improved. In addition, the front surface portion 16 and the rear surface portion 17 are formed in a shape that protrudes downward from the lower surface portion 19. This can further increase the contact area, thereby further improving the shock-absorbing performance of the frame vehicle 1.

[0059] [4. Other] The above-described embodiments are merely illustrative and are not intended to exclude various modifications or applications of techniques not explicitly described in the present embodiments. Each configuration of the present embodiments can be modified in various ways without departing from the spirit of the present embodiments. Furthermore, each configuration of the present embodiments can be selected as needed, or can be appropriately combined with various configurations included in known techniques.

[0060] For example, the specific shapes and structures of the stopper member 7 and the stopper receiving member 9 are not limited to those in the above-described embodiment, and may be, for example, a bracket shape other than a box shape, or a polygonal prism shape or a polyhedron shape. By attaching at least the stopper member 7 to the outer surface 15 of the side member 3 in the vehicle width direction, locating the stopper receiving member 9 in front of or behind it, and attaching the stopper receiving member 9 to the cabin 8 so as to straddle the side sill 10 and the floor panel 11, it is possible to obtain the same functions and effects as in the above-described embodiment. [Industrial Applicability]

[0061] The present invention is applicable to the frame vehicle manufacturing industry, and also applicable to the frame and cabin manufacturing industry applied to frame vehicles. [Explanation of symbols]

[0062] 1 Frame vehicle 2 frames 3 Side members 4 cross members 5 Cabin Mount 6 Mounting bracket 7 Stopper member 8 Cabins 9 Stopper receiving member 10 Side sill 11 Floor panel 12 Floor Cross 13 Side step 14 Top side 15 External surface 16 Front part (front side) 17 Rear part (rear side) 18 External part (outer surface) 19 Bottom part (bottom end face) 20 Top part 21 Front flange 22 Rear flange 23 Lower flange 24 Upper flange 31 Bottom side 32 Inner surface 33 Bottom side 34 Inner surface 35 Bottom side 36 Front side 37 Posterior side 38 Lower end surface 39 Inner surface 41 First flange 42 Second flange portion 43 Third flange 44 Fourth flange part 45 Fifth flange 46 Sixth flange 50 Reinforcement member 51 First reinforcing flange 52 Second reinforcing flange 53 Third reinforcing flange 54 Fourth reinforcing flange 55 Reinforcement surface section 60 Connecting member 61 First side 62 Second surface part 63 Third side part 64 Front connection flange 65 Rear connection flange

Claims

1. A body structure of a frame vehicle including a frame including a pair of left and right side members extending in a vehicle longitudinal direction, and a cabin installed on an upper portion of the frame, the cabin having a pair of left and right side sills arranged opposite each other on the outer sides of the side members in the vehicle width direction, and a floor panel connecting the side sills in the vehicle width direction, a stopper member attached to an outer surface of the side member in the vehicle width direction; a stopper receiving member attached to the cabin so as to straddle the side sill and the floor panel, and disposed in front of or behind the stopper member; a reinforcing member provided inside the stopper receiving member and reinforcing the stopper receiving member, the stopper receiving member has a box-like shape having a front side surface that forms an end surface at the front of the vehicle, a rear side surface that forms an end surface at the rear of the vehicle, a lower end surface that forms a lower end surface, and an inner side surface that forms an end surface on the inner side in the vehicle width direction, The reinforcing member is formed in a surface shape that conforms to the lower end surface of the stopper receiving member and is joined to the lower surface of the side sill. A frame vehicle body structure characterized by:

2. The stopper receiving member is disposed behind the stopper member.

2. The frame vehicle body structure according to claim 1.

3. The stopper receiving member has a first flange portion extending from the front side surface and joined to the inner surface of the side sill in the vehicle width direction, a second flange portion extending from the front side surface and joined to the underside of the floor panel, a third flange portion extending from the rear side surface and joined to the inner surface of the side sill in the vehicle width direction, and a fourth flange portion extending from the rear side surface and joined to the underside of the floor panel.

2. The frame vehicle body structure according to claim 1.

4. The stopper receiving member has a fifth flange portion that extends from the lower end surface and is joined to the lower surface of the side sill.

2. The frame vehicle body structure according to claim 1.

5. The stopper receiving member has a sixth flange portion that extends from the inner surface and is joined to the lower surface of the floor panel.

2. The frame vehicle body structure according to claim 1.

6. The lower surface of the side sill, the reinforcing member, and the fifth flange portion are welded together in three layers.

5. The frame vehicle body structure according to claim 4.

7. The reinforcing member has a first reinforcing flange portion extending from a reinforcing surface portion disposed along the lower end surface and joined to the front side surface, a second reinforcing flange portion extending from the reinforcing surface portion and joined to the rear side surface, and a third reinforcing flange portion extending from the reinforcing surface portion and joined to the inner side surface.

2. The frame vehicle body structure according to claim 1.

8. A body structure of a frame vehicle comprising a frame including a pair of left and right side members extending in the fore-and-aft direction of the vehicle, and a cabin installed on the upper part of the frame, the cabin having a pair of left and right side sills arranged opposite each of the side members on the outer side in the vehicle width direction, and a floor panel connecting the side sills in the vehicle width direction, a stopper member attached to an outer surface of the side member in the vehicle width direction; a stopper receiving member attached to the cabin so as to straddle the side sill and the floor panel, and disposed in front of or behind the stopper member; a side step fixed to the side sill and extending outward from the side sill in a vehicle width direction; a connecting member that connects the stopper receiving member and the side step; A frame vehicle body structure comprising:

9. the stopper member has a box-like shape having a front surface portion forming an end surface at the front of the vehicle, a rear surface portion forming an end surface at the rear of the vehicle, a lower surface portion forming a lower end surface, and an outer surface portion forming an end surface at an outer side in the vehicle width direction, The front surface of the stopper member or the rear surface of the stopper member is disposed opposite the stopper receiving member.

9. The frame vehicle body structure according to claim 1.

10. the stopper member has an upper surface portion fixed to an upper surface of the side member, The front surface of the stopper member or the rear surface of the stopper member is formed in a shape that protrudes upward beyond the top surface.

10. The frame vehicle body structure according to claim 9.

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