JP2011189794A - Floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor structure capable of enhancing the safety of a driver and suppressing an increases in the number of components of a floor frame. <P>SOLUTION: This floor structure includes a floor frame 11 which is mounted on the lower face of the floor to connect a cab hinge 3 with a cab mount 4. The floor frame 11 includes: a front straight portion 12 extending from forward to backward of a vehicle; an inclined portion 13 rising diagonally upward from a rear end of the front straight portion 12; and a rear straight portion 14 extending from the rear end of the inclined portion 13 toward backward. The rear straight portion 14 is formed with an easy-to-deform portion which generates lateral deformation on impact deformation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a floor structure.

  In general, in a large vehicle such as a cab-over type truck, as shown in FIGS. 19 and 20, a cab hinge 3 of a cab 2 is disposed above a chassis frame 1 extending in the vehicle front-rear direction with a required interval in the vehicle width direction. Similar to the chassis frame 1, a cross-sectional hat-shaped floor frame 5 that connects to the cab mount 4 is disposed so as to extend in the vehicle front-rear direction with a required interval in the vehicle width direction, and the floor panel 6 is disposed on the floor frame 5. Is to be placed.

  The floor frame 5 includes a front straight portion 5a extending in the horizontal direction, an inclined portion 5b rising obliquely upward from the rear end of the front straight portion 5a, and a rear straight portion 5c extending in the horizontal direction from the rear end of the inclined portion 5b. have.

  For example, Patent Document 1 shows a general technical level of the floor structure as shown in FIGS. 19 and 20.

JP-A-10-7029

  However, when a load is applied to the floor frame 5 constituted by the front straight portion 5a, the inclined portion 5b, and the rear straight portion 5c due to a collision, a curved shape between the front straight portion 5a and the inclined portion 5b is formed. The stress concentrates on the bent part or the curved bent part between the inclined part 5b and the rear straight part 5c, the floor frame 5 buckles and deforms in the front-rear direction, and the seat moves forward of the vehicle, thereby improving the driver's safety. There was a case that the sex decreased. In addition, when many reinforcing members are added as in the patent document, there is a problem that the number of parts increases and the manufacturing cost increases.

  In view of such circumstances, the present invention intends to provide a floor structure that increases the safety of the driver and reduces the increase in the number of parts of the floor frame.

  The present invention includes a floor frame that is provided on the lower surface of the floor and connects a cab hinge and a cab mount. The floor frame rises obliquely upward from a front straight portion that extends from the front to the rear of the vehicle and a rear end of the front straight portion. It has an inclined portion and a rear straight portion extending rearward from the rear end of the inclined portion, and the rear straight portion is provided with an easily deformable portion that causes lateral deformation at the time of collision deformation. It depends on the floor structure.

  In this invention, it is preferable that the said easily deformable part is provided in the reinforcement member distribute | arranged to a rear part straight part.

  In the present invention, the easily deformable portion is preferably formed by cutting out the reinforcing member on the side of the vehicle.

  The present invention also includes a hat-shaped floor frame having a cross-sectional shape that is provided on the lower surface of the floor and connects the cab hinge and the cab mount. The floor frame includes a front straight portion that extends rearward from the front of the vehicle, and a rear portion of the front straight portion. A cross-sectional shape having an inclined portion that rises obliquely upward from the end and a rear straight portion that extends rearward from the rear end of the inclined portion, the inclined portion being located in the front fold portion and / or the rear fold portion The present invention relates to a floor structure characterized by a deep hat-shaped depth.

  The present invention further includes a floor frame provided on the lower surface of the floor to connect the cab hinge and the cab mount. The floor frame extends from the front to the rear of the vehicle, and obliquely upwards from the rear end of the front straight. An inclined part that rises and a rear straight part that extends rearward from the rear end of the inclined part, and the inclined part is a front lap part that overlaps the front straight part at the front part, and / or a rear straight part at the rear part The present invention relates to a floor structure characterized in that a rear lap portion that overlaps with the portion is provided.

  According to the floor structure of the present invention, the rear straight portion is provided with an easily deformable portion that causes lateral deformation, so that even when a load acts on the floor frame due to a collision, the floor frame is in the vehicle longitudinal direction. By suppressing the deformation and causing lateral deformation, the driver's safety can be improved. In addition, since the floor frame is configured by including the front straight portion, the inclined portion, and the rear straight portion, an increase in the number of parts can be suppressed and the manufacturing cost can be reduced. Further, when the depth of the cross-sectional hat shape located at the front fold portion of the inclined portion or / and the rear fold portion of the inclined portion is increased, the floor frame is prevented from being deformed in the front-rear direction. Safety can be increased. Furthermore, when a front lap portion that overlaps the front straight portion at the front portion of the inclined portion, or / and a rear wrap portion that overlaps the rear straight portion at the rear portion of the inclined portion, the floor frame is deformed in the front-rear direction. It is possible to achieve an excellent effect of being able to suppress and increase the safety of the driver.

It is a schematic side view which shows the Example of the floor structure of this invention. It is a schematic plan view which shows the Example of the floor structure of this invention. FIG. 3 is a cross-sectional view corresponding to III-III in FIG. 1. FIG. 4 is an equivalent view taken along the line IV-IV in FIG. 1. It is a VV cross-section equivalent view of FIG. It is a VI-VI cross-section equivalent view of FIG. It is a disassembled perspective view which shows the relationship between a front straight part, an inclination part, a rear straight part, a 1st reinforcement member, and a 2nd reinforcement member. It is a side view which shows a front part straight part. It is a top view which shows a front part straight part. It is a side view which shows an inclination part. It is a top view which shows an inclination part. It is a side view which shows a rear straight part. It is a top view which shows a rear straight part. It is a side view which shows a 1st reinforcement member. It is a top view which shows a 1st reinforcement member. It is a side view which shows a 2nd reinforcement member. It is a top view which shows a 2nd reinforcement member. (A) When the easily deformable portion of the second reinforcing member is provided on the outer side in the vehicle width direction, (B) When the easily deformable portion of the second reinforcing member is provided on the inner side in the vehicle width direction It is a conceptual diagram which shows the action moment to the inclination part. It is side sectional drawing which shows an example of the floor structure of a common cab over type | mold truck. It is a disassembled perspective view which shows the relationship between a chassis frame, a floor frame, and a floor panel.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIGS. 1-18 is an Example of the floor structure of this invention, In the figure, the part which attached | subjected the code | symbol same as FIG. 19, FIG. 20 represents the same thing.

  In the case of the present embodiment, the floor frame 11 provided on the lower surface (floor lower surface) of the floor panel 6 and connecting the cab hinge 3 and the cab mount 4 has a cross-sectional hat shape and is curved so as to avoid an engine (not shown). (FIG. 2 shows the right floor frame 11 in the vehicle traveling direction). The floor frame 11 includes a front straight part 12 extending from the front to the rear of the vehicle, an inclined part 13 rising obliquely upward from the rear end of the front straight part 12, and a rear part extending rearward from the rear end of the inclined part 13. The straight part 14, the 1st reinforcement member 15 arrange | positioned inside the front part straight part 12, and the 2nd reinforcement member 16 arrange | positioned inside the back part straight part 14 are provided.

  As shown in FIGS. 8 and 9, the front straight portion 12 includes a front bottom surface 17 extending rearward from the vehicle front position on the floor frame 11, and a front side surface 18 formed by bending both sides of the front bottom surface 17. And a front upper edge surface 19 extending in the vehicle width direction from the upper end of the front side surface 18 to have a cross-sectional hat type configuration. Further, behind the front straight portion 12, a front upper edge surface 19 and a cutout portion 12a formed by cutting out the upper portion of the front side surface 18 are provided to facilitate superposition with the inclined portion 13. Yes. Here, the configuration of the front bottom surface 17 will be described in more detail. The front bottom surface 17 extends obliquely downward from the front end to a predetermined position when viewed from the side, and a bracket 3a (see FIG. 1) is arranged on the lower surface. A front surface 17a that connects the cab hinge 3, an intermediate surface 17b that forms a straight horizontal surface from the front surface 17a in the vehicle front-rear direction, and a rear surface 17c that extends obliquely upward from the intermediate surface 17b to the rear end. ing.

  As shown in FIGS. 10 and 11, the inclined portion 13 bends the middle bottom surface 20 that is bent obliquely upward from the horizontal direction on the front side of the vehicle on the floor frame 11, and further bends both sides of the middle bottom surface 20. And the middle upper side surface 21 extending in the vehicle width direction from the upper end of the middle side surface 21 has a cross-sectional hat-shaped configuration. Further, a front notch portion 23 is formed in front of the inclined portion 13 by notching the outer side in the vehicle width direction of the middle upper edge surface 22 to facilitate superposition with the front straight portion 12. Further, a rear notch 24 is formed behind the inclined portion 13 by notching the outer side in the vehicle width direction of the middle bottom surface 20, the middle side surface 21, and the middle upper edge surface 22. Here, the configuration of the middle bottom surface 20 will be described in more detail. The middle bottom surface 20 has a front surface 20a that forms a straight horizontal surface from the front end to a predetermined position when viewed from the side, and a curved shape from the front surface 20a. An intermediate surface 20b that extends obliquely upward through the front bent portion 20d and further toward the horizontal direction through the curved rear bent portion 20e, and a rear surface that forms a straight horizontal plane from the intermediate surface 20b to the rear end. 20c. Further, the inclined portion 13 increases the strength of the inclined portion 13 by increasing the depth of the cross-sectional hat shape located at the front bent portion 20d and / or the rear bent portion 20e. Further, the inclined portion 13 can be reduced in size from the combination of the front straight portion 12 and the rear straight portion 14, and when the inclined portion 13 is reduced in size, deep drawing without providing additional parts. Can be formed.

  As shown in FIGS. 12 and 13, the rear straight portion 14 includes a rear bottom surface 25 extending rearward from the inclined portion 13 in the floor frame 11, a rear side surface 26 formed by bending both sides of the rear bottom surface 25, and a rear side surface 26. And a rear upper edge surface 27 extending in the vehicle width direction from the upper end of the vehicle. Here, the configuration of the rear bottom surface 25 will be described in more detail. The rear bottom surface 25 is, as viewed from the side, a front surface 25a that forms a straight horizontal plane from the front end to the middle position, and from the front surface 25a to the rear end. A rear surface 25b that extends obliquely upward and has a bracket 4a (see FIG. 1) on the lower surface to connect the cab mount 4 is provided. Further, the rear bottom surface 25 is formed so as to gradually widen the width of the rear surface 25b rearward when viewed from above.

  The first reinforcing member 15 includes a first bottom surface 28 having a predetermined width and length, and a first bottom surface 28 so that the first reinforcing member 15 can be installed inside the cross-sectional hat shape of the front straight portion 12 as shown in FIGS. The first side surface 29 is formed by bending both sides of the bottom surface 28 and has a U-shaped cross-sectional configuration.

  The second reinforcing member 16 includes a second bottom surface 30 having a predetermined width and length, a second bottom surface 30 so that the second reinforcing member 16 can be installed inside the cross-sectional hat shape of the rear straight portion 14 as shown in FIGS. The second side surface 31 is formed by bending both sides of the bottom surface 30 and has a U-shaped cross-sectional configuration. Further, an easily deformable portion 32 is formed in front of the second reinforcing member 16 by providing a notch on the outer side in the vehicle width direction (vehicle side side) of the second side surface 31 and the second bottom surface 30. Here, the easily deformable portion 32 is not limited to a notch, and may be a hole, a thin layer portion with a reduced thickness, or another material that can be easily deformed.

  As shown in FIGS. 1 to 6, the floor frame 11 is configured such that the first reinforcing member 15 is disposed inside the front straight portion 12, and the first reinforcing member 15 is halfway from the front end portion of the front straight portion 12. It is located in between. Further, the front straight portion 12 is provided with a tip portion of the inclined portion 13 so as to sandwich the rear end portion of the first reinforcing member 15, and the inclined portion 13 rises from the rear end of the front straight portion 12. It is installed to extend to. Further, the front straight portion 12 and the first reinforcing member 15 are fixed to the front bottom surface 17 and the first bottom surface 28 by bolt fastening means 33 or welding, and the front straight portion 12 and the inclined portion 13 are The front bottom surface 17 and the middle bottom surface 20 are fixed by welding. Here, the front straight portion 12 is reinforced by the first reinforcing member 15 and connected to the cab hinge 3. Moreover, while forming the double front lap | wrap part 35 with which the front straight part 12 and the inclination part 13 overlap from the middle part to the rear-end part of the front straight part 12, in the front-end | tip part of the inclination part 13, A triple front wrap portion 36 is formed in which the front straight portion 12, the first reinforcing member 15, and the inclined portion 13 overlap. Further, in the double front wrap portion 35, the middle bottom surface 20 of the inclined portion 13 extends from the front bottom surface 17 of the front straight portion 12 from the tip portion of the inclined portion 13 to the contact portion between the front straight portion 12 and the inclined portion 13. It is fixed in a floating state (see FIG. 5). For this reason, the closed cross section formed by the inclined part 13 is formed in the closed cross section formed by the front straight part 12, and the strength of the floor frame 11 can be increased by these two closed cross sections. Further, in the triple front wrap portion 36, the strength of the closed cross section formed by the inclined portion 13 is continued to the first reinforcing member 15, and the strength can be further increased. Furthermore, the space surrounded by the front straight portion 12, the first reinforcing member 15, and the inclined portion 13 becomes a closed space to prevent rust due to water intrusion, and the rigidity of the floor frame 11 is enhanced by the closed cross section. In addition, the cross section is prevented from collapsing.

  The floor frame 11 is configured such that the rear end portion of the inclined portion 13 is surrounded by the front end side of the rear straight portion 14 so that the rear straight portion 14 extends rearward from the rear end of the inclined portion 13. Further, the front end portion of the second reinforcing member 16 is arranged inside the rear straight portion 14 so as to sandwich the rear end portion of the inclined portion 13, and the second reinforcing member 16 is halfway from the front portion of the rear straight portion 14. It is located in between. The rear straight portion 14 and the inclined portion 13 are fixed by welding at the rear bottom surface 25 and the middle bottom surface 20 or the like, and the rear straight portion 14 and the second reinforcing member 16 are fixed at the rear bottom surface 25 and the second bottom surface 30 or the like. It is fixed by welding. Here, at the front part of the rear straight part 14, a double rear wrap part 39 in which the inclined part 13 and the rear straight part 14 overlap is formed, and the rear straight part 14 is located at the front middle position of the rear straight part 14. 14, the inclined portion 13, and the second reinforcing member 16 form a triple rear wrap portion 40. Further, a part of the easily deformable part 32 such as a notch formed in the second reinforcing member 16 matches the rear notch part 24 (see FIG. 11) of the inclined part 13, and the easily deformable part 32 is in the vehicle width direction. The double rear wrap portion 39 and the triple rear wrap portion 40 are adjacent to each other. As a result, since the easily deformable portion 32 is provided in the double rear wrap portion 39 and the triple rear wrap portion 40 having high rigidity, deformation can be promoted by stress concentration.

  Further, a seat 42 is disposed above the inclined portion 13 and the rear straight portion 14 of the floor frame 11 via a floor panel 6 and a bracket 41. Here, a bed space may be provided above the inclined portion 13 and the rear straight portion 14 to provide a bed.

  Next, the operation of the above embodiment will be described.

  When a load is applied to the floor frame 11 due to a collision, stress concentrates on the easily deformable portion 32 such as a notch, and the floor frame 11 buckles and deforms to the side of the vehicle with the easy deformable portion 32 as the center. To absorb. As a result, the amount of movement of the seat 42 forward of the vehicle can be reduced.

  At the same time, the floor frame 11 increases the strength by the depth of the cross-sectional hat shape located at the front bent portion 20d of the inclined portion 13 and / or the rear bent portion 20e of the inclined portion 13, and the seat of the floor frame 11 in the vehicle longitudinal direction is increased. Suppress bending. In addition, the double front wrap portion 35, the triple front wrap portion 36, the double rear wrap portion 39, and the triple rear wrap portion 40 arranged on the floor frame 11 before and after the inclined portion 13 are the front straight portion 12. In addition to reinforcing the joint portion of the inclined portion 13 and the rear straight portion 14, the strength in the vehicle front-rear direction is increased to suppress buckling of the floor frame 11 in the vehicle front-rear direction.

  Thus, according to the embodiment, the rear straight portion 14 is provided with the easily deformable portion 32 that deforms to the side of the vehicle, so that a load acts on the floor frame 11 due to a collision. However, the floor frame 11 can be prevented from being deformed in the vehicle front-rear direction, and the safety of the driver can be improved. Further, since the floor frame 11 is configured by including the front straight portion 12, the inclined portion 13, the rear straight portion 14, the first reinforcing member 15, and the second reinforcing member 16, an increase in the number of parts is suppressed, and the manufacturing cost is reduced. Can be reduced.

  In addition, the easily deformable portion 32 is asymmetrical in strength with respect to the central axis of the cross section (shown by C in FIG. 3) by a notch or a hole arranged in the rear straight portion 14, to the side during the collision deformation. It causes deformation. Further, when the easily deformable portion 32 is provided on the second reinforcing member 16 disposed on the rear straight portion 14, the easily deformable portion 32 can be easily provided on the floor frame 11 while increasing the strength of the floor frame 11. Safety can be easily increased.

  Moreover, if the easily deformable part 32 is formed by notching the second reinforcing member 16 on the side of the vehicle, the easily deformable part 32 can be easily formed, and the safety of the driver can be easily increased. Can do. Here, when the easily deformable portion 32 of the second reinforcing member 16 is disposed on the outer side in the vehicle width direction or on the inner side in the vehicle width direction, the floor frame 11 is buckled and deformed laterally with the easily deformable portion 32 as the center. On the other hand, considering the case where a load is applied from the rear of the vehicle due to a collision from the rear of the vehicle, the configuration having the notch easily deformable portion 32 on the outer side in the vehicle width direction as shown in FIG. Compared with the configuration having 32 on the inner side in the vehicle width direction, the offset amount at the time of deformation is a <b, the acting moment on the inclined portion 13 is reduced, the bending is suppressed and the axial force is received, and the strength of the floor frame 11 Is advantageous.

  Further, according to the embodiment, the depth of the cross-sectional hat shape located at the front bent portion 20d of the inclined portion 13 and / or the rear bent portion 20e of the inclined portion 13 is increased, so that no additional parts are provided. Further, the floor frame 11 can be prevented from being deformed in the front-rear direction, and the safety of the driver can be improved.

  Further, according to the embodiment, the front wrap portions 35 and 36 that overlap the front straight portion 12 at the front portion of the inclined portion 13 and / or the rear wrap portions 39 and 40 that overlap the rear straight portion 14 at the rear portion of the inclined portion 13. Is provided to prevent deformation by increasing the strength of the front and rear portions of the inclined portion 13, which is disadvantageous in strength. As a result, the floor frame 11 is prevented from being deformed in the front-rear direction, and the driver's safety. Can be increased.

  The floor structure of the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the scope of the present invention.

3 cab hinge 4 cab mount 11 floor frame 12 front straight portion 13 inclined portion 14 rear straight portion 16 second reinforcing member 20d front fold portion 20e rear fold portion 32 easily deformable portion 35 double front wrap portion (wrap portion)
36 Triple front wrap (wrap)
39 Double rear wrap (wrap)
40 Triple back wrap (wrap)

Claims (5)

A floor frame is provided on the lower surface of the floor to connect the cab hinge and cab mount.
The floor frame includes a front straight portion extending rearward from the front of the vehicle, an inclined portion rising obliquely upward from a rear end of the front straight portion, and a rear straight portion extending rearward from the rear end of the inclined portion. Have
A floor structure characterized in that an easily deformable portion that causes lateral deformation at the time of collision deformation is provided on the rear straight portion.   The floor structure according to claim 1, wherein the easily deformable portion is provided on a reinforcing member disposed on a rear straight portion.   The floor structure according to claim 1, wherein the easily deformable portion is formed by cutting out a reinforcing member on a side of the vehicle. It has a hat-shaped floor frame with a cross-sectional shape that connects to the cab hinge and cab mount on the lower surface of the floor.
The floor frame includes a front straight portion extending rearward from the front of the vehicle, an inclined portion rising obliquely upward from a rear end of the front straight portion, and a rear straight portion extending rearward from the rear end of the inclined portion. Have
The inclined structure is a floor structure characterized in that the depth of a cross-sectional hat shape located at a front fold or / and a rear fold is increased. A floor frame is provided on the lower surface of the floor to connect the cab hinge and cab mount.
The floor frame includes a front straight portion extending rearward from the front of the vehicle, an inclined portion rising obliquely upward from a rear end of the front straight portion, and a rear straight portion extending rearward from the rear end of the inclined portion. Have
The inclined structure has a front lap portion that overlaps the front straight portion at the front portion, and / or a rear wrap portion that overlaps the rear straight portion at the rear portion.

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