JPH0629159Y2 - Underbody structure of vehicle - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to an underbody structure of a vehicle having an improved structure around a floor pan on which a seat or the like is installed.

(Prior Art) A front floor pan that constitutes a vehicle body of a passenger car (vehicle) receives a large amount of load, and a front seat must be arranged on both sides in the vehicle width direction, or a parking lever device must be arranged on a central backbone. I won't. Therefore, in the front floor pan, conventionally, as shown in FIG. 5, a cross member c is provided on the front side upper surface of the front floor pan a along both sides in the vehicle width direction from the central backbone b, and the floor pan is provided. The lateral rigidity of a is obtained. Further, seat mounting seats e, e are provided on the cross members c, c, seat mounting brackets f are provided on both sides of the rear side of the front floor pan a, and a seat fixing hole g is provided on the rear side of the opposite backbone b. And the front seat d is attached. Further, as shown in FIG. 6, the front floor pan a at which the parking lever device h is attached is located.
The parking lever bracket j is provided on the back side of the backbone-b together with the parking lever lean force k (reinforcing member for eliminating stickiness when the parking lever is operated), and the parking lever device h is mounted on the backbone b.
Is provided.

(Problems to be solved by the invention) However, such an underbody structure requires many parts such as the cross member c, the seat mounting bracket f, the parking lever bracket j, and the parking lever lean force k. Therefore, there is a problem in terms of workability in assembling.

The present invention has been made in view of such a problem, and an object thereof is to provide an underbody structure of a vehicle capable of assembling a seat and a parking lever device with a small number of parts. It is in.

[Configuration of Device] (Means and Actions for Solving Problems) In this device, a seat bracket 3 having a closed cross section is formed on both sides of a floor pan 1 with a backbone 1a as a boundary so as to connect a mounting portion of a seat 2. The seat bracket 3 is provided in a rectangular shape along the width direction and the floor side part, respectively, and plate ends 5 are formed at the ends of the seat bracket 3 on the backbone 1a side so as to wrap with each other on the backbone 1a. By fixing the parking lever device 6 on the seat bracket 5 and providing seat mounting portions 7 and 8 at seat mounting portions of the seats 2 and 2 of the seat bracket 3, the conventional cross member, seat mounting bracket, parking lever bracket and parking Reduce the number of parts by making the green force into two parts.

(Embodiment) Hereinafter, the present invention will be described based on an embodiment shown in FIGS. 1 to 4. FIG. 1 shows an underbody structure on the front side of a passenger car (vehicle), and 1 is a front floor pan (corresponding to a floor pan) in which a backbone 1a is formed in the center. Front seats 2, 2 are arranged on both sides of the front floor pan 1 in the vehicle width direction with the backbone 1a interposed therebetween (only the left side is shown). Then, a rectangular seat bracket 3 which is an essential part of the present invention is provided on the upper surfaces on both sides sandwiching the backbone 1a of the front seats 2 and 2 so as to connect four seat mounting portions respectively. There is.

The seat bracket 3 and its surroundings will be described below.
The left and right seat brackets 3 are the same, and the structure thereof is, for example, a hat-shaped cross section shown in FIG.
Side cross member portions 3a, 3a and two side member portions 3 having a substantially inverted L-shaped cross section shown in FIGS. 4 and 5.
It has a structure in which b and 3b are integrally connected in a rectangular shape.
The cross member portions 3a, 3a are attached along the vehicle width direction, following the points where the conventional cross members and seat mounting brackets were, and form a closed cross-section structure with excellent rigidity. Also, the side member portion 3b,
3b is attached so that the inner one (on the side of the backbone 1a) faces the side portion of the backbone 1a. Further, the outer side member portion 3b on the opposite side is attached along the side edge of the front floor pan 1. Then, the outer side member portion 3b and the side sill 4 (members attached to the side portions of the front floor pan 1) are joined together to form a closed cross section similarly. The inside of each seat bracket 3, 3 installed on both sides of the backbone 1a in this way (on the side of the backbone 1a)
The side member portions 3b are each formed with a plate surface portion 5 overlapping the upper surface of the backbone 1a. Specifically, as shown in FIG. 2, the plate surface portion 5 extends the entire upper wall end forming the inverted L-shaped portion of the side member portion 3b outward by an amount corresponding to the width dimension of the backbone 1a. It has a structure. Then, as shown in FIG. 1, these plate surface portions 5 and 5 are attached to each other by wrapping each other on the backbone 1a, and the inverted L-shaped portions are attached to the side portions of the backbone 1a while forming a closed cross section. However, the rigidity of the portion to which the parking lever device 6 (device for operating the parking brake) is attached is increased instead of the conventional parking lever bracket and parking lever lean force. The parking lever device 6 is attached to the lap portion of the backbone 1a.

Further, seat mounting seats 7 and 7 and seat fixing holes 8 and 8 (both are equivalent to seat mounting portions) are provided in the seat bracket 3 where the front seat 2 is assembled.
The front seat 2 can be installed on the seat bracket 3.

However, the structure using the seat brackets 3, 3 has two parts and can also serve as a cross member, a seat mounting bracket, a parking lever bracket and a parking lever lean force, which are conventionally required for reinforcement and part mounting. Become. However, it is possible to reduce the number of parts of the underbody. Therefore, it is possible to assemble the seat and the parking lever device with a small number of parts, and it is possible to improve work efficiency.

Moreover, since the seat mounting dimensions can be maintained with high precision, the seat mounting precision can be improved. Moreover, the portion where the parking lever device 6 is attached does not become sticky as in the conventional case.

Moreover, since the front floor pan 1 including the backbone 1a is spread over a wide range by the seat brackets 3 and 3 and is reinforced so as to press the floor surface, the rigidity of the front floor pan 1 can be significantly improved. Especially, around the backbone 1a is improved. Moreover, in addition to that, since the joint rigidity of the side sill 4, which is a side bone, is also improved, the effect is that not only the rigidity of the front floor panel 1 but also the entire vehicle body can be improved.
It can be a car body.

[Advantage of the Invention] As described above, according to the present invention, the conventional cross member, seat mounting bracket, parking lever bracket, and parking lever lean can be made into two parts.

Therefore, the seat can be assembled and the parking lever device can be assembled with a small number of parts, and the working efficiency can be improved. Moreover, it is possible to improve the assembling accuracy of the seat.

Moreover, since the floor bracket is reinforced over a wide range with the seat bracket, the rigidity of the floor pan can be improved. In addition, since the joint rigidity of the side bones is also improved, the rigidity of not only the floor pan but also the entire vehicle body can be improved, and thus the floor and vehicle body with low vibration can be obtained.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention.
FIG. 1 is a perspective view showing a structure around a front floor pan of a passenger car, which is a main part, FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. Fig. 4, Fig. 4 is a sectional view taken along the line CC in Fig. 1, Fig. 5 is a perspective view showing an underbody structure of a conventional passenger car, and Fig. 6 is its D-Fig.
It is sectional drawing which follows the D line. 1 ... Front floor pan (floor pan), 1a ... Backbone, 2 ... Front seat (sheet), 3 ...
Seat bracket, 5 ... plate surface part, 6 ... parking lever device, 7, 8 ... seat mounting seat, seat fixing hole (seat mounting part).

Claims (1)

[Scope of utility model registration request] 1. A floor pan in which seats are arranged on both sides of a backbone, and a rectangular shape along the vehicle width direction and side portions of the floor so as to connect the seat attachment portions to both sides of the floor pan with the backbone as a boundary. A seat bracket having a closed cross-section provided respectively, a plate surface portion formed on the backbone side end of these seat brackets and wrapping each other on the backbone, and a parking lever device fixed on the wrapping plate surface portion. And a seat mounting portion for fixing the seat, which is provided at a mounting portion of each seat of the seat bracket.