JP3316058B2 - Lower body structure of car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower body structure of a cab-over type automobile.

[0002]

2. Description of the Related Art As a method for mounting an automobile engine,
In general, an engine room is provided in front of a vehicle compartment, and an engine is housed in the engine room. For example, as shown in Japanese Utility Model Laid-Open Publication No. A so-called cab-over type is known in which a floor panel below a passenger seat is raised one step to form a deck portion, and a space below the deck portion is used as an engine room to house an engine.

[0003]

When the engine is housed in the engine room below the deck of the floor panel as described above, hot air tends to be trapped in the engine room, causing overheating of the engine. This hot air is transmitted into the vehicle interior via the floor panel, causing a problem that the vehicle interior temperature becomes high. At the same time, the vibration from the engine is transmitted to the vertical wall surface caused by raising the floor panel by one step, and there is a problem that noise is generated by the panel vibration of the vertical wall surface.

[0004] In particular, when the size of the engine is increased in order to respond to the need for improving the engine output, the calorific value of the engine itself increases, and the space around the engine in the engine room is reduced. Is worse, and the heat is more likely to be trapped. To cope with this, if the engine room is widened, not only the interior of the vehicle compartment becomes narrower, but also the area of the vertical wall surface of the deck section becomes large, and the vertical wall surface is more likely to vibrate. That is, the above problem becomes more remarkable as the size of the engine increases.

Accordingly, the present invention provides an automobile in which an engine room is provided below a deck provided on a floor panel, wherein an engine housed in the engine room is effectively cooled, and a vertical portion constituting the deck is provided. It is an object of the present invention to provide a lower vehicle body structure capable of reducing noise due to wall vibration.

[0006]

Means for Solving the Problems In order to solve the above problems, a lower body structure of an automobile according to the present invention is characterized in that it is constructed as follows.

That is, the invention according to claim 1 of the present application (hereinafter referred to as the invention)
According to the first invention, a front surface of a floor panel forming a floor surface of the vehicle compartment is joined to a lower end of a dash panel constituting a front surface of the vehicle compartment, and the floor panel has a lower engine room. in step higher the vehicle bottom structure of the deck portion is formed to provide the above de
The front deck is located on the front of the deck.
Panel, rear deck panel on the rear, and front end
On the front deck panel and rear end on the rear deck panel
Set on the left and right sides of the deck so that they are joined together.
On a vertical wall consisting of a pair of side deck panels
Therefore, the surroundings are configured and the deck
The upper surface is open, and the center of the opening extends in the front-rear direction of the vehicle body.
Erection of the center deck member
Seat members are placed on the left and right sides of the
While location, the center of the vehicle width direction of the floor panel
The front end is on the dash panel and the rear end is the front
A tunnel portion is formed so as to be joined to the key panel , and the tunnel portion is provided in an inclined shape so that its front portion is lower and its rear portion is higher.

The invention according to claim 2 of the present application (hereinafter referred to as “the invention”)
A second aspect of the present invention is characterized in that a reinforcing member is provided at the intersection of the left and right side frames extending in the vehicle longitudinal direction on the lower surface of the floor panel and the vertical wall surfaces on the front and rear of the deck portion on the floor panel.

[0009]

According to the above structure, in any of the first and second aspects of the invention, the deck portion is raised one step at the center of the floor panel in the vehicle width direction to provide an engine room from the front end of the floor panel. Since the tunnel portion is formed on the front vertical wall surface, when the vehicle is running, wind is introduced into the engine room below the deck portion through the tunnel portion, and the engine in the engine room is cooled. The Rukoto.

Also, since the front of the tunnel portion is lowered, a degree of freedom in layout is widened, for example, by arranging a console box at the front portion, and the height of the tunnel portion becomes higher toward the rear. Because it is inclined,
As the height of the tunnel portion at the portion joined to the vertical wall surface at the front of the deck increases, the area of the vertical wall at the front of the deck decreases, and panel vibration at this portion is reduced.

Further, according to the second aspect of the present invention, the reinforcing member is disposed at the intersection of the left and right side frames extending in the vehicle longitudinal direction on the lower surface of the floor panel and the vertical wall surfaces of the floor panel in front and rear of the deck portion. Therefore, the whole deck part becomes strong and the rigidity of the vertical wall surface also increases,
Panel vibration on the vertical wall surface is further reduced.

[0012]

Embodiments of the present invention will be described below.

FIG. 1 shows a cabin 1 of a cab-over type vehicle according to this embodiment. The basic structure of the cabin 1 will be described. As shown in FIGS. 1 and 2, a dash panel 2 is provided on the front of the cabin. A front floor panel 3, which is arranged and has a front end joined to a lower end of the dash panel 2 and forms a floor surface in a front part of the vehicle compartment, is laid. Behind the front floor panel 3, there is formed a deck portion 10 characteristic of a cab-over type vehicle, and behind the deck portion 10, a rear floor panel 4 is provided.
Is laid.

As shown in FIG. 3, the deck section 10 has a front deck panel 11 having a raised central portion, left and right side deck panels 12, 13, and FIG. The periphery is constituted by a vertical wall surface comprising a rear deck panel 14 having a raised central portion, and left and right side deck panels 12, 1 are formed.
3 is joined to the front deck panel 11 and the rear end is joined to the rear deck panel 14.

Each of the panels 11 to 14 constituting the vertical wall surface
As a result, the deck portion 10 has a shape one step higher than the floor surface, and a space formed below the deck portion 10 is an engine room 16 in which the engine 17 is stored.

The upper surface 10a is open,
The central portion 10b has a raised structure. As shown by a chain line in FIG. 2, a center deck member 15 extending in the front-rear direction of the vehicle body is erected at the center of the opening end, and seat members are provided on both left and right sides thereof via seat pans (not shown). Is to be placed. That is, the upper surface portion 10a of the deck portion 10 is closed by these members, and conversely, by moving the sheet, maintenance and inspection of the engine 17 can be performed from the opening. .

Side frames 20 extending in the front-rear direction of the vehicle body as shown in FIG. 5 are provided on both left and right sides of a range from the lower surface of the front floor panel 3 to the lower surface of the rear floor panel 4 through the lower part of the deck portion 10. 21 are joined. The side frames 20, 21 are composed of side frame inner members 22, 23 and side frame outer members 24, 25. Below the front and rear floor panels 3, 4, as shown in FIG. The inner members 22, 23 and the outer members 24, 25 are joined at lower surfaces 22a to 25a to form a U-shaped cross-sectional shape having an open upper surface, and the side frame inner members 22, 23 and the outer members 24, 25 are formed. 25 are joined to the lower surfaces of the floor panels 3 and 4 via flange portions 22b to 25b formed at both upper end portions and extending in the vehicle width direction to form closed sections X and X between the floor panels 3 and 4. ing.

On the other hand, below the deck portion 10, as shown in FIGS.
The upper ends of the inner frame members 4 and 25 are bent at right angles inward in the vehicle width direction to form horizontal plane portions 24c and 25c, and have an inverted L-shaped cross-sectional shape. To form an L-shaped cross-section, and each member newly forms vertically extending flange portions 22d to 25d at both ends thereof, and the two members are combined through the flange portions 22d to 25d. It has a structure that forms a closed section Y, Y.

Further, the left and right side frames 20,
At the intersection of the front deck panel 21 and the left and right side frames 20, 21 and the rear deck panel 4, triangular gussets 30 are arranged.

The gussets 30... 30 are joined to the lower surfaces of the front deck panel 11 and the rear deck panel 14 via flanges 30 a formed at the upper ends, and the lower ends thereof are side frames 20, 21. Is joined to.

At this time, gussets 30 arranged at the intersection of the rear deck panel 14 and the left and right side frames 20, 21 and at the intersection of the front deck panel 11 and the right side frame 21 in the traveling direction of the vehicle. Reference numeral 30 denotes flange portions 24d, 25d formed at the upper end portions of the side frame outer members 24, 25, that is, the side frame outer members 24, 25 and the side frame inner members 22, 23.
Is joined to a portion of the joint A having increased rigidity.

Further, step members 40 and 41 are provided from both sides of the front floor panel 3 to the left and right side deck panels 12 and 13. Step member 4
0, 41 have vertical wall surfaces 40a, 41a and extending portions 40b, 41b extending in the vehicle width direction.
Are joined to the side end of the front floor panel 3 and the lower end of the side deck panel 12.13, and the extending portions 40b, 41b are formed at the rear thereof with the shape of the vertical wall surfaces 40a, 41a. , And extends upward to form a curved surface.

Incidentally, a tunnel portion 50 which is a feature of the present invention is formed at the center of the front floor panel 3 in the vehicle width direction. That is, the tunnel section 50
As shown in the cross-sectional shape of FIG. 6, the front floor panel 3 is formed so as to bulge upward at the center thereof, and the height thereof is reduced at the joint with the dash panel 2. The height is increased while going through a two-step inclination toward the joint B with the deck panel 11. And it is joined to the front deck panel 11 via a flange portion 51.

Next, the operation of this embodiment will be described.

According to the above configuration, the front floor panel 3 is located at the center of the front floor panel 3 in the vehicle width direction.
Front deck panel 1 from the front end of the deck section 10 to the front
1, the tunnel portion 50 is formed, so that when the vehicle is running, wind is introduced into the engine room 16 below the deck portion through the tunnel portion 50 and the engine 17 in the engine room 16 is cooled. The Rukoto.

The tunnel section 50 has a front part 5
0a is lowered, so that the degree of freedom in layout is widened, for example, by arranging the console box 52 in that portion, and the front deck panel 11 As the height H of the tunnel portion 50 at the junction B with the front deck panel 11 increases, the area S above the junction B of the front deck panel 11 decreases, and panel vibration at this portion is reduced. .

Further, the gussets 30 are arranged at the intersections of the left and right side frames 20, 21 extending in the vehicle longitudinal direction on the lower surface of the floor panel and the front deck panel 11 and the rear deck panel 14, so that the deck is provided. Since the entire portion 10 is strengthened and the rigidity of the vertical wall surface is increased, panel vibration of the vertical wall surface is further reduced.

[0028]

As described above, according to the lower body structure of an automobile according to the present invention, a deck raised one step to provide an engine room from the front end of the floor panel is provided at the center of the floor panel in the vehicle width direction. Since the tunnel is formed on the vertical wall of the front of the vehicle, when the vehicle is running, wind is introduced into the engine room below the deck through the tunnel to cool the engine in the engine room. Will be done.

Also, since the front portion of the tunnel portion is lowered, the degree of freedom in layout can be increased, such as arranging a console box in that portion, and the height increases toward the rear. Because of the inclined shape, the height of the tunnel portion at the portion joined to the vertical wall surface on the front surface of the deck portion is increased, so that the area of the vertical wall surface on the front surface of the deck portion is reduced, and panel vibration at this portion is reduced. Is reduced.

In particular, according to the second aspect of the present invention, the reinforcing member is disposed at the intersection of the left and right side frames extending in the vehicle longitudinal direction on the lower surface of the floor panel and the vertical wall surfaces on the front and rear of the deck portion of the floor panel. As a result, the entire deck portion is strengthened and the rigidity of the vertical wall surface is increased, so that panel vibration on the vertical wall surface is further reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a vehicle body according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 2;

FIG. 4 is a sectional view taken along the line CC of FIG. 2;

FIG. 5 is a side view of the side frame as viewed from outside the vehicle.

FIG. 6 is a sectional view of a tunnel portion which is a feature of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cabin 2 Dash panel 3 Front floor panel (floor panel) 4 Rear floor panel (floor panel) 10 Deck part 11 Front deck panel (vertical wall surface) 12, 13 Side deck panel (vertical wall surface) 14 Rear deck panel (vertical wall surface) 16 Engine room 20, 21 Side frame 30 Gazette (reinforcing member)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-146635 (JP, A) JP-A-48-51424 (JP, A) JP-A 4-43589 (JP, U) JP-A 50-50 74625 (JP, U) Japanese Utility Model 63-18359 (JP, U) Japanese Utility Model 57-150072 (JP, U) Japanese Utility Model 60-177171 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) B62D 25/20 B62D 33/06

Claims (2)

(57) [Claims] 1. A front surface of a floor panel forming a floor surface of a vehicle compartment is joined to a lower end of a dash panel constituting a front surface of the vehicle compartment, and an engine room is provided below the floor panel. since a vehicle bottom structure of which is one step higher the deck is formed, the deck portion
Is a front deck panel provided at the front of the deck section
The rear deck panel provided at the rear and the front end
Rear deck panel, rear deck panel
Provided on both left and right sides of the deck so that
Vertical wall surface consisting of a pair of side deck panels
The periphery is configured and the upper surface of the deck
An opening is provided at the center of the opening.
The center deck member is erected and the center deck member is
Seat members are placed on both left and right sides via seat pans.
On the other hand, at the center of the floor panel in the vehicle width direction ,
The front end is on the dash panel and the rear end is on the front deck panel.
A tunnel portion is formed so as to be joined to each of the tunnels, and the tunnel portion is provided so as to be inclined so that its front portion is lower and its rear portion is higher. Body structure. 2. A reinforcing member is provided at an intersection between left and right side frames extending in the vehicle front-rear direction on the lower surface of the floor panel and vertical wall surfaces of the floor panel in front and rear of the deck portion. 2. The lower body structure of the vehicle according to 1.