WO2021065703A1

WO2021065703A1 - Vehicle floor reinforcement structure

Info

Publication number: WO2021065703A1
Application number: PCT/JP2020/036227
Authority: WO
Inventors: 伸彦金光
Original assignee: いすゞ自動車株式会社
Priority date: 2019-09-30
Filing date: 2020-09-25
Publication date: 2021-04-08
Also published as: JP2021054335A; CN114466786A; JP7228133B2

Abstract

In the present invention, a gusset 30 has: a gusset body section 31; a gusset upper fixing section 32; a gusset lower fixing section 33; a gusset inside fixing section 34; and a gusset outside fixing section 35. The gusset body section 31 is disposed inside a floor sill that extends in a first direction, and is erected along a second direction. The outer peripheral edge of the gusset body section follows the inner peripheral surface of the floor sill. The gusset upper fixing section 32 extends in the first direction from the upper edge of the gusset body section 31, and is fixed superposed on a sill upper surface section. The gusset lower fixing section 33 extends in the first direction from the lower edge of the gusset body section 31, and is fixed superposed on a sill lower surface section. The gusset inside fixing section 34 extends in the first direction from the inside edge of the gusset body section 31 inside the vehicle cabin, and is fixed superposed on a sill inside surface section. The gusset outside fixing section 35 extends in the first direction from the outside edge of the gusset body section 31 outside the vehicle cabin, and is fixed superposed on a sill outside surface section.

Description

Vehicle floor reinforcement structure

This disclosure relates to the floor reinforcement structure of the vehicle.

Patent Document 1 describes the floor structure of a vehicle provided with a rocker portion composed of a floor side inner and a floor side outer along the side portion of the floor panel. A cross member is laid horizontally between the rocker portions, and a bulkhead is provided inside the rocker portion. In this floor structure, the lateral impact force from the door panel is transmitted to the bulkhead-cross member structure system to prevent the rocker portion from collapsing.

Japanese Patent Application Laid-Open No. 7-61374

In the structure of Patent Document 1, the bulkhead is provided to prevent the rocker portion (floor sill) from collapsing when a lateral impact force is received from the door panel, so that the bulkhead does not come off when the lateral impact force is applied. It may be fixed to the floor sill, and it is not required to hold the cross-sectional shape of the floor sill by the bulkhead. Therefore, in such a bulkhead, for example, it may not be possible to sufficiently suppress the crushing deformation of the floor sill due to bending when a load in the vertical direction is applied to the floor sill.

Therefore, the purpose of this disclosure is to reliably suppress the crushing deformation of the floor sill.

In order to achieve the above object, the floor reinforcement structure of the first aspect of the present disclosure includes a floor sill and a gusset.

The floor sill is fixed to the edge of the floor panel so as to extend in the first direction intersecting the vertical direction. The floor sill has an upper surface portion of the upper sill, a lower surface portion of the lower sill, an inner side surface portion of the sill on the passenger interior side, and an outer surface portion of the sill on the outer side of the passenger compartment. A rectangular closed cross section is formed by the inner side surface portion of the sill and the outer surface portion of the sill.

The gusset has a rectangular plate-shaped gusset main body portion, a plate-shaped gusset upper fixing portion, a plate-shaped gusset lower fixing portion, a plate-shaped gusset inner fixing portion, and a plate-shaped gusset outer fixing portion. The gusset body is arranged inside the floor sill and stands up in the vertical direction and along the second direction intersecting the first direction. The outer peripheral edge of the gusset body is along the inner peripheral surface of the floor sill. The gusset upper fixing portion extends from the upper end edge of the gusset main body portion in the first direction and is fixed so as to overlap the sill upper surface portion. The gusset lower fixing portion extends from the lower end edge of the gusset main body portion in the first direction and is fixed so as to overlap the sill lower surface portion. The gusset inner fixing portion extends in the first direction from the inner edge of the gusset main body on the vehicle interior side, and is fixed so as to overlap the sill inner side surface portion. The gusset outer fixing portion extends in the first direction from the outer edge of the gusset main body on the outer side of the passenger compartment, and is fixed so as to overlap the sill outer surface portion.

In the above configuration, a gusset having a rectangular plate-shaped gusset main body portion whose outer peripheral edge stands up along the inner peripheral surface of the floor sill is arranged inside the floor sill, and four fixing portions of the gusset (fixed portion on the gusset, The lower gusset fixing part, the gusset inner fixing part, and the gusset outer fixing part) are overlapped on the four surface parts of the floor sill (the upper surface of the sill, the lower surface of the sill, the inner side surface of the sill, and the outer surface of the sill), and the four parts of the gusset body Since the end edges (upper end edge, lower end edge, inner end edge, and outer edge) are fixed to the four face portions of the floor sill via the above four fixing portions, each fixing portion and each surface portion are fixed. Unless is released, the gusset body will not be displaced (tilted, etc.) with respect to the floor sill, and the gusset body will maintain an upright posture. Therefore, for example, the crushing deformation of the floor sill caused by bending when a load in the vertical direction is input to the floor sill can be reliably suppressed by the gusset main body portion of the gusset. The crushing deformation of the floor sill includes both elastic deformation and plastic deformation.

The second aspect of the present disclosure is the floor reinforcement structure of the first aspect, which includes a floor reinforcement.

The floor reinforcement extends below the floor panel in the second direction and is fixed to the lower surface of the floor panel to reinforce the floor panel. The end of the floor reinforcement is fixed to the lower surface of the sill so as to overlap from below. The gusset body is arranged inside the reinforcement coupling region that overlaps the end of the floor reinforcement in the floor sill.

In the above configuration, when a load is transmitted between the floor sill and the floor reinforcement when the vehicle is running, crushing deformation of the floor sill (deformation in which the rectangular closed cross section is crushed) is likely to occur in the reinforcement coupling region. , When crush deformation occurs at the reinforcement joint, the efficiency of load transmission between the floor sill and the floor reinforcement decreases, but the gusset (gusset body) reinforces the crush deformation in the relevant reinforcement joint area. Since it is suppressed, the load can be efficiently transmitted between the floor sill and the floor reinforcement.

The third aspect of the present disclosure is the floor reinforcement structure of the second aspect, and the floor reinforcement has a plate-shaped reinforcement fixing portion that overlaps the lower surface of the lower surface portion of the sill from below. The gusset lower fixing portion, the sill lower surface portion, and the reinforcement fixing portion are fixed in a state of surface contact with each other so that the sill lower surface portion is sandwiched between the gusset lower fixing portion and the reinforcement fixing portion.

In the above configuration, the gusset lower fixing portion, the floor sill sill lower surface portion, and the floor reinforcement reinforcement fixing portion are placed on each other so that the sill lower surface portion is sandwiched between the gusset lower fixing portion and the reinforcement fixing portion. Since it is fixed in a surface contact state, the load can be transmitted more efficiently between the floor sill and the floor reinforcement.

According to the present disclosure, crushing deformation of the floor sill can be reliably suppressed.

FIG. 1 is a side view schematically showing a vehicle according to an embodiment of the present disclosure. FIG. 2 is a perspective view of the floor reinforcing structure according to the embodiment of the present disclosure as viewed diagonally from above. FIG. 3 is a perspective view of the gusset of FIG. FIG. 4 is a bottom view of the floor reinforcement structure of FIG. 2 as viewed from below the vehicle. FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 7 is a cross-sectional view taken along the line VII-VII of FIG.

Hereinafter, one embodiment of the present disclosure will be described with reference to the drawings. In the figure, FR indicates the front of the vehicle, UP in the figure indicates the upper part of the vehicle, and IN in the figure indicates the inside in the vehicle width direction. Further, in the following description, the front-rear direction means the front-rear direction of the vehicle 1, and the left-right direction means the left-right direction in the vehicle width direction when facing the front of the vehicle.

As shown in FIG. 1, the vehicle 1 provided with the floor reinforcement structure according to the present embodiment is a vehicle with a frame in which the body 3 is supported by the vehicle body frame 2. On the left and right sides of the lower surface portion (body lower surface portion 4) of the body 3, a plurality of supported portions (4 locations in the present embodiment) are provided so as to be separated from each other in the front-rear direction, and the body 3 is provided with each supported portion 5. It is elastically supported by the vehicle body frame 2 via an elastic member 6 such as rubber.

As shown in FIG. 2, the body 3 is joined to the floor panel 10 that divides the lower part of the passenger compartment and the rear end edge of the floor panel 10 and extends in the vehicle width direction (the first direction that intersects the vertical direction). The rear end sill (floor sill) 11 and the left and right side sill 12 (only the left side in FIG. 2) are joined to the left and right edge portions of the floor panel 10 and extend in the front-rear direction (the second direction intersecting the vertical direction and the vehicle width direction). (Fig.) And a rear pillar 13 that stands up from the left and right rear corners of the lower surface portion 4 of the body (the portion where the end portion of the rear end sill 10 in the vehicle width direction and the rear end portion of the side sill 11 intersect) and extends upward. ..

As shown in FIG. 4, a floor reinforcement 14 arranged below the floor panel 10 and reinforcing the floor panel 10 is fixed to the lower surface of the floor panel 10. The floor reinforcement 14 connects the left and right first reinforcement portions 15 extending in the front-rear direction separated in the vehicle width direction and the left and right first reinforcement portions 15 extending in the vehicle width direction at predetermined positions in the front-rear direction. It has a plurality of second reinforcement portions 16. The floor reinforcement 14 has a concave hat-shaped cross section that bulges downward and is open upward (see FIG. 7), and the flange portions 17 on both sides of the concave shape are joined to the lower surface of the floor panel 10. A closed cross section is formed between the floor panel 10 and the floor panel 10.

As shown in FIG. 2, the floor panel 10, the rear end sill 11, the side sill 12, and the floor reinforcement 14 constitute the lower surface portion 4 of the body. The rearmost supported portion 5R of the plurality of supported portions 5 of the body 3 is set at the left and right rear corners of the lower surface portion 4 of the body (see FIG. 4). When the vehicle is running, the load (vibration) input from the tire 7 (see FIG. 1) to the rearmost supported portion 5R of the body 3 via the vehicle body frame 2 and the elastic member 6 (see FIG. 1) is mainly applied. It is distributed and transmitted to the rear end sill 11, the side sill 12, and the rear pillar 13.

As shown in FIGS. 5 to 7, the rear end sill 11 is formed by the upper sill 18 and the lower sill 19. The upper sill 18 is bent forward from the upper sill upper surface portion 20, the sill inner side surface portion 21 on the vehicle interior side extending downward from the front end edge of the sill upper surface portion 20, and the lower end edge of the sill inner side surface portion 21. The front upper flange portion 22 extending and the rear upper flange portion 23 extending obliquely upward from the rear end edge of the sill upper surface portion 20 are integrally provided, and are formed by, for example, bending a metal plate material. The lower sill 19 includes a lower sill lower surface portion 24, a sill outer surface portion 25 on the outer side of the passenger compartment that bends upward from the rear end edge of the sill lower surface portion 20, and an upper sill lower surface portion 24 from the front end edge. It integrally has a front lower flange portion 26 that is bent and further bent forward and extends, and a rear lower flange portion 27 that is bent from the upper end edge of the sill outer surface portion 25 and extends diagonally upward rearward. For example, a metal plate material is bent. It is formed by doing. The front upper flange portion 22 and the front lower flange portion 26 are vertically overlapped and joined, and the rear upper flange portion 23 and the rear lower flange portion 27 are vertically overlapped and joined, whereby the upper sill 18 and the lower sill 19 are joined. The rear end sill 11 is formed by.

Inside the rear end sill 11, a rectangular closed cross section is formed by the sill upper surface portion 20, the sill lower surface portion 24, the sill inner side surface portion 21, and the sill outer surface portion 25. In the present embodiment, the upper surface portion 20 of the sill has a convex shape in which the front side region is inclined forward and diagonally downward from the front end edge of the central region, and the rear side region is inclined backward and diagonally downward from the rear end edge of the central region. The lower surface portion 24 of the sill, the inner side surface portion 21 of the sill, and the outer surface portion 25 of the sill are flat plates, but the shapes of the

surface portions

20, 21, 24, and 25 of the rear end sill 11 can be arbitrarily set.

The rear end portion of the floor panel 10 overlaps the front lower flange portion 26 from below, and is joined to the front upper flange portion 22 and the front lower flange portion 26. The rear end portion of the flange portion 17 of the first reinforcement portion 15 extends rearward along the lower surface of the sill lower surface portion 24, and a plate-shaped reinforcement fixing portion 28 is joined to the sill lower surface portion 24 so as to overlap from below. Configure.

As shown in FIG. 4, the left and right gussets 30 are arranged and fixed inside the joints with the left and right first reinforcement portions 15 of the rear end sill 11. Since the left and right gussets 30 are provided symmetrically, the left gusset 30 will be described below, and the detailed description of the right gusset 30 will be omitted.

As shown in FIGS. 3 and 5 to 7, the gusset 30 has a rectangular plate-shaped gusset main body 31, a plate-shaped gusset upper fixing portion 32, a plate-shaped gusset lower fixing portion 33, and a plate-shaped gusset. The gusset inner fixing portion 34 and the plate-shaped gusset outer fixing portion 35 are integrally provided.

The outer peripheral edge of the gusset main body 31 is formed in a rectangular shape so as to be along the inner peripheral surface of the rear end sill 11, and stands up along the front-rear direction. The gusset main body 31 is arranged inside the reinforcement coupling region 39 which is vertically overlapped with the rear end of the first reinforcement 15 of the rear end sill 11. Further, the gusset main body 31 is formed in a concave shape in which the central portion thereof partially bulges toward one side in the vehicle width direction (inside in the vehicle width direction in the present embodiment). Due to the concave shape, the rigidity of the gusset main body 31 is increased, and the gusset 30 is less likely to be deformed.

The gusset upper fixing portion 32 bends and extends inward in the vehicle width direction from the upper end edge of the gusset main body portion 31, and is fixed so as to overlap the inner surface (lower surface) of the sill upper surface portion 20. The gusset lower fixing portion 33 bends and extends outward in the vehicle width direction from the lower end edge of the gusset main body portion 31, and is fixed so as to overlap the inner surface (upper surface) of the sill lower surface portion 24. The gusset inner fixing portion 34 bends and extends inward in the vehicle width direction from the front end edge (inner end edge on the vehicle interior side) of the gusset main body 31, and is fixed so as to overlap the inner surface (rear surface) of the sill inner side surface portion 21. The gusset outer fixing portion 35 bends and extends outward in the vehicle width direction from the rear end edge (outer end edge outside the passenger compartment) of the gusset main body 31, and is fixed so as to overlap the inner surface (front surface) of the sill outer surface portion 25. ..

In the present embodiment, the fixing portions 32 to 35 of the gusset 30 extend from the gusset main body portion 31 so that the gusset upper fixing portion 32 and the gusset inner fixing portion 34 are inside in the vehicle width direction, and the gusset lower fixing portion 33 and Although the gusset outer fixing portion 35 is outside in the vehicle width direction, the gusset 30 may be formed so as to extend in the opposite direction to any one or more of the fixing portions 32 to 35.

Further, the method of fixing the fixing portions 32 to 35 of the gusset 30 to the

surface portions

20, 24, 21, 25 of the rear end sill 11 is arbitrary, and in the present embodiment, the gusset upper fixing portion 32 and the sill upper surface portion 20 are used. Is fixed by fastening the bolt 36 and the nut 37 with an adhesive, the gusset lower fixing portion 33 and the sill lower surface portion 24 are fixed by spot welding, and the gusset inner fixing portion 34 and the sill inner side surface portion 21 are fixed by an adhesive. It is fixed, and the gusset outer fixing portion 35 and the sill outer surface portion 25 are fixed by spot welding. A bolt insertion hole 38 through which the bolt 36 is inserted is formed in the gusset upper fixing portion 32. Similar to the sill upper surface portion 20, the gusset upper fixing portion 32 has a convex shape in which the front side region is inclined forward and diagonally downward from the front end edge of the central region, and the rear side region is inclined forward and diagonally downward from the rear end edge of the central region. A bolt insertion hole 38 is provided in a region partially extending inward in the vehicle width direction from the central region.

As shown in FIG. 7, one of the gusset lower fixing portion 33, the sill lower surface portion 24, and the left and right reinforcement fixing portions 28 has a sill lower surface portion 24 between the gusset lower fixing portion 33 and the reinforcement fixing portion 28. They are stacked in a state of surface contact with each other so as to be sandwiched, and are fixed by spot welding or the like. The gusset main body 31 of the present embodiment is arranged in a region of the reinforcement coupling region 39 of the rear end sill 11 that overlaps the rear end portion of the first reinforcement portion 15 and overlaps with the concave shape of the first reinforcement portion 15. , Further, it is arranged on the outside in the vehicle width direction (on the right side in FIG. 7) of the relevant area. The gusset lower fixing portion 33 of the present embodiment is fixed so as to overlap with the reinforcement fixing portion 28 on the outer side in the vehicle width direction (right side in FIG. 7) of the left and right reinforcement fixing portions 28 of the first reinforcement portion 15.

According to the present embodiment, inside the rear end sill 11, a gusset 30 having a rectangular plate-shaped gusset main body 31 whose outer peripheral edge stands up along the inner peripheral surface of the rear end sill 11 is arranged, and 4 of the gusset 30 The fixed parts (gusset upper fixing part 32, gusset lower fixing part 33, gusset inner fixing part 34, and gusset outer fixing part 35) are attached to the four surface parts of the floor sill (sill upper surface part 20, sill lower surface part 24, sill inner side). Overlapping the face portion 21 and the sill outer surface portion 25), the four end edges (upper end edge, lower end edge, inner edge and outer edge) of the gusset main body 31 are passed through the four fixing portions 32 to 35. Since it is fixed to the four

surface portions

20, 24, 21, 25 of the rear end sill 11, the gusset main body portion 31 is not fixed unless the fixing portions 32 to 35 and the

surface portions

20, 24, 21, 25 are released. Does not displace (tilt, etc.) with respect to the rear end sill 11, and the gusset body 31 maintains an upright posture. Therefore, for example, the gusset main body 31 of the gusset 30 can reliably suppress the crushing deformation of the rear end sill 11 due to bending when a load in the vertical direction is input to the rear end sill 11. The crushing deformation of the rear end sill 11 includes both elastic deformation and plastic deformation.

Further, when a load is transmitted between the rear end sill 11 and the first reinforcement portion 15 when the vehicle is running or the like, the crushing deformation of the rear end sill 11 (deformation such that the rectangular closed cross section is crushed) is the reinforcement. It is likely to occur in the coupling region 39, and if crushing deformation occurs in the reinforcement coupling portion 39, the load transmission efficiency between the rear end sill 11 and the first reinforcement portion 15 decreases, but the reinforcement coupling region 39 is affected. Since the gusset 30 (gusset main body 31) is reinforced to suppress crushing deformation, the load can be efficiently transmitted between the rear end sill 11 and the first reinforcement portion 15.

Therefore, for example, the load (vibration) input from the supported portion 5R to the rear end sill 11 when the vehicle is running can be efficiently transmitted to the first reinforcement portion 15. In particular, in the present embodiment, the position of the gusset main body 31 in the reinforcement coupling region 39 is located on the outer side in the vehicle width direction (closer to the supported portion 5R to which the load is input) in the region overlapping the concave shape of the first reinforcement portion 15. Since it is on the side), the vibration input during traveling can be transmitted to the floor reinforcement 14 more efficiently.

Further, the gusset lower fixing portion 33 of the gusset 30, the sill lower surface portion 24 of the rear end sill 11, and the reinforcement fixing portion 28 of the first reinforcement portion 15 are located between the gusset lower fixing portion 33 and the reinforcement fixing portion 28. Since the sill lower surface portions 24 are fixed in surface contact with each other so as to be sandwiched between them, the load can be transmitted more efficiently between the rear end sill 11 and the first reinforcement portion 15.

Further, in the case of a vehicle in which the floor reinforcement 14 is provided with a seatbelt fixing point (for example, a seatbelt anchor mounting point), the forward load input to the floor reinforcement 14 via the seatbelt at the time of a vehicle front collision is applied to the rear end. It can be efficiently transmitted to the sill 11 to suppress the deformation of the floor reinforcement 14.

Although the present disclosure has been described above based on the above-described embodiment, the present disclosure is not limited to the contents of the above-described embodiment, and of course, it can be changed as appropriate without departing from the present disclosure. That is, it goes without saying that all other embodiments, examples, operational techniques, and the like made by those skilled in the art based on this embodiment are included in the scope of the present disclosure.

For example, in the present embodiment, a vehicle with a frame in which the outer end portion of the rear end sill 11 in the vehicle width direction is elastically supported by the vehicle body frame 2 has been described, but the floor reinforcement structure of the present disclosure is other than the vehicle with a frame (for example, a monocoque vehicle). May be applied to.

Further, in the present embodiment, the case where the gusset 30 is provided inside the rear end sill 11 has been described, but the gusset 30 may be provided inside another floor sill (for example, the side sill 12) to reinforce the floor.

This application is based on a Japanese patent application (Japanese Patent Application No. 2019-181007) filed on September 30, 2019, the contents of which are incorporated herein by reference.

This disclosure is applicable to vehicles equipped with floor sills.

1: Vehicle 2: Body frame 3: Body 4: Body

lower surface

5, 5R: Supported part 6: Elastic member 7: Tire 10: Floor panel 11: Rear end sill (floor sill)
12: Side sill 13: Rear pillar 14: Floor reinforcement 15: First reinforcement part 16: Second reinforcement part 17: Floor reinforcement flange part 18: Upper sill 19: Lower sill 20: Sill upper surface part 21: Sill Inner side surface portion 22: Front upper flange portion of upper sill 23: Rear upper flange portion of upper sill 24: Sill lower surface portion 25: Sill outer surface portion 26: Front lower flange portion of lower sill 27: Rear lower flange portion of lower sill 28: Reinforcement fixing part 30: Gasset 31: Gasset main body 32: Gasset upper fixing part 33: Gasset lower fixing part 34: Gasset inner fixing part 35: Gasset outer fixing part 36: Bolt 37: Nut 38: Bolt insertion hole 39 : Reinforce joint

Claims

It is fixed to the edge of the floor panel so as to extend in the first direction intersecting the vertical direction, and the upper surface of the upper sill, the lower surface of the lower sill, the inner side surface of the sill on the passenger interior side, and the outer surface of the sill on the outer passenger compartment A floor sill in which a rectangular closed cross section is internally partitioned by
With a gusset placed inside the floor sill,
The gusset
A rectangular plate-shaped gusset body that stands up in the vertical direction and along the second direction that intersects the first direction, and whose outer peripheral edge is along the inner peripheral surface of the floor sill.
A plate-shaped gusset upper fixing portion that extends from the upper end edge of the gusset main body portion in the first direction and is fixed so as to overlap the upper surface portion of the sill.
A plate-shaped lower gusset fixing portion that extends from the lower end edge of the gusset main body portion in the first direction and is fixed so as to overlap the lower surface portion of the sill.
A plate-shaped gusset inner fixing portion extending in the first direction from the inner edge of the gusset main body on the vehicle interior side and overlapping and being fixed on the inner side surface of the sill.
A vehicle floor reinforcing structure having a plate-shaped gusset outer fixing portion extending in the first direction from the outer edge of the gusset main body portion on the outer side of the vehicle interior and being fixed so as to overlap the sill outer surface portion. ..
The floor reinforcing structure according to claim 1.
A floor reinforcement that extends below the floor panel along the second direction and is fixed to the lower surface of the floor panel to reinforce the floor panel.
The end portion of the floor reinforcement is fixed to the lower surface portion of the sill so as to overlap from below.
The gusset main body portion is a vehicle floor reinforcing structure characterized in that the gusset main body portion is arranged inside a reinforcement coupling region that is vertically overlapped with the end portion of the floor reinforcement in the floor sill.
The floor reinforcement structure according to claim 2.
The floor reinforcement has a plate-shaped reinforcement fixing portion that overlaps from below on the lower surface of the lower surface portion of the sill.
The gusset lower fixing portion, the sill lower surface portion, and the reinforcement fixing portion are fixed in a state of being in surface contact with each other so that the sill lower surface portion is sandwiched between the gusset lower fixing portion and the reinforcement fixing portion. The floor reinforcement structure of the vehicle, which is characterized by being done.