JP5807533B2 - Vehicle floor structure - Google Patents

Description

  The present invention includes a front floor panel having a tunnel portion, a rear floor panel, and a pair of left and right parking brake cables that pass from the inside of the tunnel portion, that is, the outside of the vehicle, to the rear of the step portion formed at the front portion of the rear floor panel. And a vehicle floor structure.

  Conventionally, a parking brake cable as an example of vehicle parts passes from the tunnel portion of the front floor panel to the rear of the rear floor panel step portion (so-called kick-up portion), bypasses the side of the fuel tank, and passes to the left and right rear wheels. Routed.

  The parking brake cable is bent more than a predetermined value because it affects the brake performance, that is, the radius of curvature cannot be reduced more than a predetermined value, and considering the layout with other parts, the routing route is less flexible. is there.

  In particular, in a rear wheel drive vehicle or a four wheel drive (4WD) vehicle in which a propeller shaft is disposed in the tunnel portion, a vehicle having a large exhaust pipe, or a vehicle having a low floor type and a relatively small tunnel portion, the parking brake cable is arranged. The degree of freedom of the space for the rope has been further reduced, and in the past, for example, by moving the fuel tank placement position to the rear of the vehicle, it was possible to secure the parking brake cable placement space. In this case, the wheel base becomes long, and there is room for improvement in terms of downsizing the vehicle, particularly in terms of downsizing the longitudinal length of the vehicle.

  By the way, Patent Document 1 discloses a front floor panel, a tunnel portion extending in the vehicle longitudinal direction at a substantially central portion in the vehicle width direction of the front floor panel, a rear floor panel positioned behind the front floor panel, and the rear floor. A step portion (kick-up portion) formed at the front portion of the panel, and the tunnel portion is formed in a divergent shape in which the rear side is gradually widened as viewed from above, and the rear end portion of the tunnel portion is formed as described above. Although a vehicle floor structure coupled to a stepped portion is disclosed, Patent Document 1 does not disclose a parking brake cable as an example of a vehicle component at all.

Japanese Utility Model Publication No. 1-68991

  Therefore, in the present invention, the lower end of the step portion at the front portion of the rear floor panel is joined to the rear portion of the front floor panel including the tunnel portion, and the joint portion between the side surface of the tunnel portion and the step portion is connected to the basic surface of the tunnel portion side surface. Forming a bulging portion that bulges outward in the vehicle width direction, and disposing the first vehicle component so as to pass between the bulging portion and the basic surface. An object of the present invention is to provide a vehicle floor structure in which the space in the vehicle front-rear direction can be narrowed, and thereby the vehicle body front-rear length can be made compact.

A vehicle floor structure according to the present invention includes a front floor panel, a tunnel portion extending in the vehicle longitudinal direction at a substantially central portion in the vehicle width direction of the front floor panel, and a rear floor panel positioned behind the front floor panel, A vehicle floor structure comprising a pair of left and right first vehicle parts that pass from the outside of the tunnel portion to the rear of the step portion formed at the front portion of the rear floor panel, wherein the lower end of the step portion is A bulge that is coupled to the rear portion of the front floor panel including the tunnel portion, and bulges outward in the vehicle width direction with respect to a basic surface of the side surface of the tunnel portion at a joint portion between the side surface of the tunnel portion and the stepped portion. The first vehicle component is disposed so as to pass between the bulging portion and the basic surface.
The first vehicle component described above may be set as a parking brake cable, or may be set as another vehicle component such as a conductive cable, fuel piping, brake piping, or air conditioning piping.

  According to the above configuration, the bulging portion that bulges outward in the vehicle width direction is formed at the coupling portion between the side surface of the tunnel portion and the stepped portion (so-called kick-up portion), and the first vehicle component is Since it arrange | positions so that it may pass between the said basic surfaces, the arrangement space of the 1st vehicle parts can be earned in the said bulging part, and, thereby, the vehicle front-and-rear for the 1st vehicle parts arrangement | positioning The space in the direction can be narrowed, and the vehicle body front-rear length can be made compact.

In one embodiment of the present invention, the bulging portion is formed so as to avoid a ridge line portion formed by the side surface and the upper surface of the tunnel portion.
According to the above configuration, since the bulged portion is formed so that the ridge line portion remains between the side surface of the tunnel portion and the upper surface of the tunnel portion, a collision is caused by the ridge line portion having a high load transmission contribution degree at the time of frontal collision of the vehicle. The load can be smoothly transmitted from the tunnel portion to the stepped portion of the rear floor panel, the strength against the front impact can be improved, and the rigidity of the coupling portion can be improved by the bulging portion.

In one embodiment of the present invention, a second vehicle component is disposed below the rear floor panel and behind the step portion of the rear floor panel, and the first vehicle component is a vehicle at least on the upper surface of the tunnel portion. A parking brake cable supported by a mounting member on a lower surface and a vehicle rear side surface below the step portion of the rear floor panel, and an upper surface portion of the bulging portion is inclined downward toward the outside in the vehicle width direction. The parking brake cable is disposed along the upper surface of the bulge and through the space between the stepped portion and the second vehicle component.
The second vehicle part described above may be set in a fuel tank, a battery, an exhaust pipe, or the like.

  According to the above configuration, the parking brake cable can be routed between the stepped portion and the second vehicle part without forcibly bending the parking brake cable as the first vehicle part. Thus, even in a vehicle having a relatively small tunnel portion, the vehicle body length can be reduced.

  According to the present invention, the lower end of the step portion at the front portion of the rear floor panel is coupled to the rear portion of the front floor panel including the tunnel portion, and the junction portion between the side surface of the tunnel portion and the step portion is connected to the basic surface of the tunnel portion side surface. The bulging portion bulging outward in the vehicle width direction is formed, and the first vehicle component is disposed so as to pass between the bulging portion and the basic surface. The space in the front-rear direction can be narrowed, which has the effect of making the vehicle body front-rear length compact.

Schematic plan view showing a vehicle floor structure of the present invention 1 is an enlarged plan view of the main part of FIG. Bottom view of the portion corresponding to FIG. Bottom view of the exhaust system, propeller shaft, and rear differential device removed from FIG. 4 is an enlarged bottom view of the main part of FIG. The perspective view which shows the principal part of the floor structure for vehicles in the state seen from diagonally upward The perspective view which shows the connection structure of a tunnel part and a level | step difference part 2 is a cross-sectional view taken along line AA in FIG. A perspective view of a mounting member that supports the parking brake cable on the upper surface of the tunnel portion. The perspective view which shows the attachment member of FIG. 9 in the state which looked up from the vehicle downward direction A perspective view of a mounting member that supports the parking brake cable on the lower surface of the vehicle

  The purpose of narrowing the vehicle front-rear direction space for the first vehicle parts routing and reducing the vehicle body front-rear length is the front floor panel and the front-rear panel in the vehicle width direction substantially central portion of the front floor panel. A tunnel portion extending in a direction, a rear floor panel positioned behind the front floor panel, and a pair of left and right first passages passing from the vehicle exterior side of the tunnel portion to the rear of the step portion formed at the front portion of the rear floor panel. A vehicle floor structure including a vehicle component, wherein a lower end of the stepped portion is coupled to a rear portion of the front floor panel including the tunnel portion, and the side surface of the tunnel portion is coupled to the stepped portion. And a bulging portion that bulges outward in the vehicle width direction with respect to the basic surface of the side surface of the tunnel portion, and the first vehicle component passes between the bulging portion and the basic surface. It was realized by configurations that are arranged so as.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawing shows a vehicle floor structure, and FIG. 1 is a plan view schematically showing the vehicle floor structure. In FIG. 1, a dash lower panel 1 for partitioning an engine room and a vehicle compartment in the front-rear direction is provided. A front floor panel 2 that forms the floor of the passenger compartment is joined and fixed to the lower rear end of the dash lower panel 1.

The front floor panel 2 is a panel extending from the lower rear end of the dash lower panel 1 to the rear of the vehicle. The front floor panel 2 protrudes into the vehicle interior and extends in the longitudinal direction of the vehicle body at a substantially central portion in the vehicle width direction. A tunnel part 3 is provided. In this embodiment, the front floor panel 2 and the tunnel portion 3 are constituted by different members, and the front floor panel 2 and the tunnel portion 3 made of these different members are integrated by a welding joining means such as spot welding. ing.
Side sills 4, 4 extending in the front-rear direction of the vehicle are joined and fixed to the left and right side portions of the front floor panel 2 described above.

The side sill 4 is a vehicle body strength member that has a side sill closed section that extends in the front-rear direction of the vehicle by joining the side sill inner and the side sill outer, and the side sill 4 improves the rigidity of the side portion of the vehicle body.
In addition, at the rear part of the front floor panel 2, no. The rear floor panel 6 is joined and fixed via a step portion 5 as a three cross member. The rear floor panel 6 is a panel member that forms the floor surface of the luggage compartment.

  Here, as shown in the perspective view of FIG. 7, the stepped portion 5 described above is formed integrally with the kick-up portion 7 extending in the vertical direction and the lower end of the kick-up portion 7, and includes the tunnel portion 3. A lower coupling flange portion 8 coupled to the rear portion of the panel 2 and an upper coupling flange 9 integrally formed with the upper end of the kick-up portion 7 and coupled to the front portion of the rear floor panel 6 are seen in a side view. It is a vehicle body strength member integrally formed in a substantially Z shape.

On the other hand, in the rear part of the rear floor panel 6 described above, a spare tire pan 10 for storing a spare tire (or other parts) is formed in a recessed manner in the middle part in the vehicle width direction (see FIG. 1).
Furthermore, rear side frames 11, 11 extending in the front-rear direction of the vehicle are provided on the left and right sides of the rear floor panel 6. The front end portion of the rear side frame 11 described above extends forward of the vehicle up to the rear end portion of the side sill 4.

  As shown in FIG. 1, the front floor panel 2 between the dash lower panel 1 and the stepped portion 5 has a front cross member that connects the tunnel portion 3 and the side sill 4 in the vehicle width direction in the front-rear direction intermediate portion. No. 2 cross members 12 and 12 are provided. A closed cross section extending in the vehicle width direction is formed between the two cross member 12 and the front floor panel 2 to improve the rigidity of the lower vehicle body.

  As shown in FIG. No. 2 as a cross member that connects between the tunnel portion 3 and the side sill 4 in the vehicle width direction also in the front-rear direction intermediate portion of the front floor panel 2 between the cross member 12 and the stepped portion 5. 2.5 Cross members 13 and 13 are provided. A closed cross section extending in the vehicle width direction is also formed between the 2.5 cross member 13 and the front floor panel 2 to improve the lower vehicle body rigidity.

Further, as shown in FIG. 1, in the middle part in the front-rear direction of the rear floor panel 2 between the above-described stepped portion 5 and the front end portion of the spare tire pan 10, there is a space between the pair of left and right rear side frames 11, 11 in the vehicle width direction. No. as the rear cross member to be connected. A four cross member 14 is provided to improve the rear vehicle body rigidity. This No. The 4 cross member 14 is 4 cross member upper, 4 cross member lowers.
In FIG. 1, 15 is a front wheel, and 16 is a rear wheel.

2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is a bottom view thereof. In FIG. 3, a second vehicle component is provided below the rear floor panel 6 and behind the stepped part 5 of the rear floor panel 6. A fuel tank 17 is provided.
The fuel tank 17 is formed in a bowl shape in which a portion corresponding to the tunnel portion 3 is recessed upward. The bowl-shaped fuel tank 17 is formed on the vehicle body side using a pair of left and right tank bands 18 and 18. It is supported.
That is, the front end portion of the tank band 18 is fixedly supported by the step portion 5, and the rear end portion of the tank band 18 is No. 5. The four cross members 14 are fixedly supported.
Further, a protective cover 19 for integrally protecting the fuel tank 17 from heat damage is integrally attached to the lower surface (bottom surface of the vehicle outside) of the portion where the fuel tank 17 is recessed upward corresponding to the tunnel portion 3. ing.

In this embodiment, a vehicle in which at least the rear wheels 16 and 16 are driven is illustrated as a vehicle. The propeller shaft 20 is disposed, and an exhaust pipe 21 is disposed further below the propeller shaft 20.
In FIG. 3, 22 is a rear differential device, 23 is a rear axle shaft, 24 is a sub-frame, and the sub-frame 24 is composed of a front cross member 25, a rear cross member 26, and left and right side members. Parts 27 and 27.
In FIG. 3, 28 is a front lower arm, 29 is a rear lower arm, and 30 is a trailing arm.

  4 is a bottom view in a state where the exhaust pipe 21, the propeller shaft 20, the rear differential device 22 and the like are removed from FIG. 3, FIG. 5 is an enlarged bottom view of the main part of FIG. 4, and FIG. 6 is a main part of the vehicle floor structure. FIG. 7 is a perspective view showing a coupling structure between a tunnel portion and a step portion, and FIG. 8 is a cross-sectional view taken along line AA in FIG.

As shown in FIG. 6, the coupling flange portion 8 as the lower end of the stepped portion 5 is coupled to the rear portion of the front floor panel 2 including the tunnel portion 3 from above, and the rear portion of the top deck portion 3 a of the tunnel portion 3. A coupling portion 81 between the end portion and the coupling flange portion 8, and a coupling portion 82 between the rear end portion of the side surface 3 b of the tunnel portion 3 and the coupling flange portion 8 are formed.
In addition, of the coupling portions 81 and 82, the coupling portion 82 with the side surface 3b of the tunnel portion 3 swells outward in the vehicle width direction with respect to the basic surface 3c on the side surface of the tunnel portion indicated by an imaginary line in FIG. A pair of left and right bulging portions 83, 83 are formed.

As shown in FIGS. 6 and 8, the pair of left and right bulging portions 83, 83 are formed so as to avoid the ridgeline portion 3 d formed by the side surface 3 b of the tunnel portion 3 and the top deck portion 3 a of the tunnel portion 3. It has been done. In other words, the above-described bulging portions 83 and 83 are formed so as to leave the ridge line portion 3d of the tunnel portion 3 in consideration of the load transferability at the time of the front collision.
Furthermore, as shown in FIGS. 6 and 8, the above-described bulging portion 83 is formed so that the upper surface portion thereof is inclined downward toward the outer side in the vehicle width direction.
As shown in FIGS. 2 to 6 and 8, a pair of left and right parking brake cables 31 and 32 are provided as first vehicle parts.

As shown in the bottom view in FIG. 4, the pair of left and right parking brake cables 31, 32 pass from the outside of the tunnel portion 3 to the rear of the step portion 5 formed at the front portion of the rear floor panel 6, 17 is routed around the left and right rear wheels 16 and 16 by bypassing the left and right sides.
Specifically, as shown in FIG. 8, the pair of left and right parking brake cables 31 and 32 are disposed so as to pass between the bulging portion 83 and the basic surface 3 c on the side surface of the tunnel portion 3.

9 is a perspective view of an attachment member that supports the parking brake cables 31 and 32 on the upper surface of the tunnel portion 3, FIG. 10 is a perspective view showing the attachment member of FIG. 9 as viewed from below the vehicle, and FIG. , 32 is a perspective view of an attachment member that supports the lower surface of the vehicle.
Each of the parking brake cables 31 and 32 described above includes inner cables 31a and 32a and outer tubes 31b and 32b, as shown in FIGS.

As shown in the plan view of FIG. 2.5 No. 2 between the cross member 13 and the stepped portion 5 A raised portion 3 e that rises further upward than the top deck portion 3 a is integrally formed at a portion adjacent to the 2.5 cross member 13.
As shown in FIGS. 4 and 5, a pair of left and right mounting members 33, 34 are used on the surface of the top deck portion 3 a of the tunnel portion 3 on the vehicle lower side of the raised portion 3 e. 31 and 32 are supported.
As shown in FIGS. 4 and 5, the bracket 40 and the attachment are provided on the lower surface of the lower coupling flange portion 8 and the lower rear surface of the kick-up portion 7 as the vehicle rear side surface below the step portion 5. Parking brake cables 31 and 32 are supported using member 41.

  As shown in FIGS. 9 and 10, the mounting members 33 and 34 described above include tube holding portions 33a and 34a that hold the outer tubes 31b and 32b, and guide portions 33b that hold the inner cables 31a and 32a movably. 34b and mounting seats 33c, 34c are provided, and the mounting seats 33c, 34c are fastened and fixed to the above-described raised portion 3e using the fastening member 35.

As shown in FIGS. 2 and 9, the guide portions 33b and 34b of the attachment members 33 and 34 protrude upward (in the vehicle compartment side) from the opening formed in the raised portion 3e, and each of these guide portions 33b and 34b. The front ends of the inner cables 31a and 32a that are guided so as to be movable are connected and fixed to a single equalizer 36 shown in FIG.
As shown in FIG. 2, the equalizer 36 and a parking brake lever (not shown) are connected by a single parking brake cable 37.

  The left and right brackets 40 and 40 and the attachment members 41 and 41 shown in FIG. 5 are formed in the same structure. That is, as shown in a perspective view of one bracket 40 and one attachment member 41 in FIG. 11, the bracket 40 described above has a U-shaped cross-section bracket body 40a and a plurality of integrally formed bracket bodies 40a. There are mounting seats 40b, 40c, 40d, and 40e, and these mounting seats 40b to 40e are fixed to the vehicle body side.

The mounting member 41 has a holding portion 41b integrally formed at the rear end portion of the mounting seat 41a. As shown in FIG. 11, the holding portion 41b holds the outer tube 32b of the parking brake cable 32. The mounting seat 41a described above is fixed to the bracket 40 using the fastening member 42.
Although FIG. 11 shows the bracket 40 and the mounting member 41 on the right side of the vehicle, the bracket and the mounting member on the left side of the vehicle are configured in the same manner as that on the right side.
Then, as shown in the bottom view in FIG. 5, the parking brake cables 31 and 32 supported by the mounting members 33, 34, 41, and 41 are routed along the upper surface portions of the bulging portions 83 and 83 described above. After that, it is disposed so as to pass through the space between the stepped portion 5 and the fuel tank 17, and further bypasses the side of the fuel tank 17 to the rear wheel 16 side as shown in FIGS. It has been routed.

Further, as shown in FIGS. 3 and 4, the parking brake cables 31 and 32 described above are supported by other mounting members 43 and 43 on the inner side in the front vehicle width direction of the trailing arm 30. The member 43 is fixed to the front mounting seat 30a of the trailing arm 30.
In the figure, 50 is a tunnel member having a cross-sectional hat shape formed integrally with the tunnel portion 3, and 51 is a floor frame that forms a closed cross section between the front floor panels 2.
In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, and arrow UP indicates the upper side of the vehicle.

  As described above, the vehicle floor structure of the above embodiment includes the front floor panel 2, the tunnel portion 3 extending in the vehicle longitudinal direction at the substantially center portion in the vehicle width direction of the front floor panel 2, and the front floor panel 2 described above. And a pair of left and right first vehicle parts (parking brake cables 31,...) That pass from the outside of the tunnel portion 3 to the rear of the step portion 5 formed at the front portion of the rear floor panel 6. 32), the lower end of the stepped portion 5 is coupled to the rear portion of the front floor panel 2 including the tunnel portion 3, and the side surface 3b of the tunnel portion 3 and the above-described A bulging portion 83 that bulges outward in the vehicle width direction with respect to the basic surface 3c of the tunnel portion side surface 3b is formed in the coupling portion 82 with the stepped portion 5, and the first vehicle component (par Ring reference brake cable 31, 32) in which it is disposed so as to pass between the bulged portion 83 and the base surface 3c (see FIG. 6, FIG. 8).

According to this configuration, the bulging portion 83 that bulges outward in the vehicle width direction is formed in the coupling portion 82 between the tunnel side surface 3b and the step portion 5, so that the first vehicle component (see the parking brake cables 31, 32). Is disposed so as to pass between the bulging portion 83 and the basic surface 3c, so that the bulging portion 83 reserves a space for arranging the first vehicle parts (parking brake cables 31, 32). Thus, the space in the vehicle front-rear direction for routing the first vehicle component (see the parking brake cables 31 and 32) can be narrowed, and the vehicle body front-rear length can be made compact.
Further, the bulging portion 83 is formed so as to avoid the ridge line portion 3d formed by the side surface 3b and the upper surface (see the top deck portion 3a) of the tunnel portion 3 (see FIG. 6).

According to this configuration, the bulging portion 83 is formed so that the ridge portion 3d remains between the tunnel side surface 3b and the tunnel portion upper surface (top deck portion 3a). The ridge line portion 3d having a high contribution can smoothly transmit a collision load from the tunnel portion 3 to the step portion 5 at the front portion of the rear floor panel 6, thereby improving the proof strength against the front collision and the bulging portion. 83, the rigidity of the coupling portion 82 can be improved.
Furthermore, a second vehicle component (see fuel tank 17) is disposed below the rear floor panel 6 and behind the stepped portion 5 of the rear floor panel 6, and the first vehicle component is at least connected to the tunnel portion 3. Parking brake cable 31 supported by mounting members 33, 34, 41, 41 on the vehicle lower side surface of the upper surface (top deck portion 3 a) and the vehicle rear side surface below the stepped portion 5 at the front of the rear floor panel 6. , 32, the upper surface portion of the bulging portion 83 is inclined downward in the vehicle width direction, and the parking brake cables 31, 32 are along the upper surface portion of the bulging portion 83, and It is disposed so as to pass through the space between the step portion 5 and the second vehicle component (see the fuel tank 17) (see FIGS. 4, 5, and 6).

  According to this configuration, the parking brake cables 31 and 32 are connected to the stepped portion 5 and the second vehicle part (fuel tank 17) without excessively bending the parking brake cables 31 and 32 as the first vehicle parts. It is possible to reduce the length of the vehicle body in the longitudinal direction even in a low floor type vehicle with a relatively small tunnel portion.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The first vehicle component of the present invention corresponds to the parking brake cables 31 and 32 of the embodiment,
Similarly,
The upper surface of the tunnel part corresponds to the top deck part 3a,
The second vehicle part corresponds to the fuel tank 17,
The present invention is not limited to the configuration of the above-described embodiment.
For example, the first vehicle component may be a conductive cable instead of the parking brake cables 31 and 32 disclosed in the embodiment, and the second vehicle component may be a battery or battery instead of the fuel tank 17. It may be a part such as an exhaust pipe or a main silencer.

  As described above, the present invention includes a front floor panel, a tunnel portion extending in the vehicle longitudinal direction at a substantially central portion in the vehicle width direction of the front floor panel, and a rear floor panel positioned behind the front floor panel. This is useful for a vehicle floor structure comprising a pair of left and right first vehicle parts that pass from the outside of the tunnel portion to the rear of a step portion formed at the front portion of the rear floor panel.

2. Front floor panel
3 ... Tunnel part
3a ... Top deck (top surface of tunnel)
3b ... Side
3c ... Basic surface
3d ... Ridge line
5 ... Step part
6 ... Rear floor panel
17 ... Fuel tank (second vehicle part)
31, 32 ... Parking brake cable (first vehicle member)
33, 34 ... Mounting member
41 ... Mounting member
82. Joint part
83 ... bulge part

Claims (3)

Front floor panel,
A tunnel portion extending in the longitudinal direction of the vehicle body at a substantially central portion in the vehicle width direction of the front floor panel;
A rear floor panel located behind the front floor panel;
A vehicle floor structure comprising a pair of left and right first vehicle parts that pass from the outside of the tunnel portion to the rear of the step portion formed at the front portion of the rear floor panel,
A lower end of the stepped portion is coupled to a rear portion of the front floor panel including the tunnel portion;
A bulging portion that swells outward in the vehicle width direction with respect to the basic surface of the tunnel portion side surface is formed at a coupling portion between the side surface of the tunnel portion and the stepped portion,
A vehicle floor structure in which the first vehicle component is disposed so as to pass between the bulging portion and the basic surface. The vehicle floor structure according to claim 1, wherein the bulging portion is formed so as to avoid a ridge line portion formed by a side surface and an upper surface of the tunnel portion. A second vehicle component is disposed below the rear floor panel and behind the stepped portion of the rear floor panel;
The first vehicle component is a parking brake cable supported by an attachment member at least on a vehicle lower surface of the upper surface of the tunnel portion and a vehicle rear surface of the rear floor panel step portion lower portion,
The upper surface portion of the bulging portion is inclined downward toward the outside in the vehicle width direction,
3. The vehicle according to claim 1, wherein the parking brake cable is disposed so as to be along an upper surface portion of the bulging portion and to pass through a space between the step portion and the second vehicle component. Floor structure.

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