JPH04113281U - Automobile lower body structure - Google Patents

Abstract

(57) [Summary] [Purpose] To efficiently improve the rigidity of the mount support portion and the surrounding floor panel in a vehicle body in which the chassis frame mounts and supports the floor panel. [Structure] The flange 2a at the side edge of the floor panel 2, which has a tunnel portion 4 extending in the longitudinal direction of the vehicle and bulging inward of the vehicle interior, is formed in the center of the vehicle width direction. It is welded to the side sill 6 extending in the direction.
A bead 5 extending from the tunnel portion 4 to the side sill 6 is formed at the middle portion of the floor panel 2 in the longitudinal direction of the vehicle body, thereby increasing the surface rigidity of the floor panel 2. The floor panel 2 is mounted and supported by the chassis frame 3 via a mount bracket 7, a rubber mount 8, and a chassis bracket 9. The upper part (7e) of the mount bracket 7 is attached to the front and rear walls (5a) forming the bead 5, and the side part 7b is attached to the side sill 6.
The mount brackets 7 are respectively welded to the inner panels 6b of the mount brackets 7 to increase the rigidity of the mount support portions.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention focuses on the lower body structure of automobiles, especially when the body is mounted by the chassis frame. Related to the mount support part of the car that supports the vehicle and the surrounding car body structure It is.

0002

[Conventional technology]

An automobile body is a one-piece structure in which the body and chassis frame are integrally formed. It has a body and a chassis frame separate from the body, and a chassis made of rubber etc. A vehicle body with a structure to which the body is attached via a mount (hereinafter, the chassis frame is Supporting the sea urchin body is called ``mount support.''

0003 If the chassis frame is a vehicle body that mounts and supports the body, the body mount The support part receives external forces such as thrusting, torsion, and vibration while driving, so the mount The support part needs to have bending and torsion strength.

0004

[Problem that the idea aims to solve]

An automobile mount with a chassis frame that mounts and supports the body as shown above. For example, the structure of the support part is as disclosed in Japanese Utility Model Application Publication No. 63-112985. It extends in the longitudinal direction of the vehicle along the side edges of the floor panels that make up the floor of the vehicle. The mount is fixed inside the side sill with a closed cross-section structure, and the mount is embedded and fixed within this mount. Extend the other end of the bracket from the opening provided on the side of the side sill and attach it to the chassis. It is known that it is combined with a frame. In this case, rigidity as a mount support Although the size is higher, the openings are provided on the sides of the side sills, which have a closed cross-section structure, so the size is lower. It is conceivable that the rigidity of the dosil itself decreases.

[0005] Therefore, we designed a structure in which the floor panel is mounted and supported by the chassis frame. The car body is also known, but since the floor panel is made of thin steel plate, The vibration of the floor panel may bend the floor panel around the mount support. The rigidity was not sufficient.

[0006] In view of the above issues, this invention is designed to mount and support the floor panel on the chassis frame. Efficiently improves the rigidity of the mount support and surrounding floor panels in the vehicle body. The purpose is to provide a lower body structure for automobiles that can be lifted up. be.

[0007]

[Means to solve the problem]

In order to solve the above problems, the lower body structure of the automobile according to the present invention has A floor panel that forms the floor of the vehicle body and has a bead that extends in the vehicle width direction at the center of the vehicle. on the front and rear walls forming the bead on the underside of this floor panel. A mount bracket to which the parts are connected, and the mount bracket is connected to the mount bracket. It is characterized by a chassis frame that mounts and supports the lower panel. It is something that

[0008] In addition, in order to solve the above problems, the lower body structure of an automobile according to the present invention has the above structure. In addition to the It is also possible to connect it to a side sill extending in the longitudinal direction of the vehicle body.

[0009]

[Action and effect]

As mentioned above, the lower body structure of the automobile according to the present invention has a The bead is formed on the lower surface of the floor panel where a bead extending in the vehicle width direction is formed. The chassis frame is attached via a mounting bracket whose upper part is connected to the front and rear walls that form the A frame mounts and supports the floor panel.

0010 A bead extending in the vehicle width direction counteracts the bending of the floor panel around the mount support. The upper part of the mat is engaged with the front and rear walls forming a bead. The mount bracket is attached to the chassis frame of the floor panel at the mount support. Improves rigidity against upthrust. Additionally, the side of the mounting bracket If you connect it to the side sill, the floor panel and side sill will be connected to the mounting bracket. The top of the mounting bracket will be connected to the front of the bead. Because it is attached to the back wall, it reduces the horizontal stress added to the mounting bracket. The rigidity of the floor panel against twisting can also be improved.

[0011] Therefore, the automobile lower body structure according to the present invention includes the Mauton support portion and its It is possible to efficiently improve the rigidity of surrounding floor panels.

0012

【Example】

Below, examples of the lower body structure of an automobile according to the present invention will be explained based on the drawings. I will clarify.

[0013] FIG. 1 is similar to FIG. 4, which shows the structure of the lower body structure of an automobile according to an embodiment of the present invention. Figure 2 is a sectional view taken along line II-I in Figure 1, showing the structure of the mount support part. II line sectional view, Figure 3 is an external perspective view showing each component, and Figure (a) is the floor panel. (b) is a perspective view of the mount bracket, (c) is a perspective view of the mount bracket. An external perspective view of the chassis frame to which the chassis brackets are connected, and FIG. 1 is a diagram schematically showing a part of a car body with a lower body structure of a car according to an embodiment of the invention; FIG.

[0014] As shown in FIG. 4, the vehicle body 1 equipped with the lower vehicle body structure of the present embodiment is The floor panel 2 that makes up the floor and the front of the vehicle body that mounts and supports the floor panel 2. The vehicle includes a chassis frame 3 (only a portion of which is shown) extending rearward. floor In the middle part of the panel 2 in the vehicle width direction, there is a tonne extending in the longitudinal direction of the vehicle body that bulges inward to the interior of the vehicle. A flannel portion 4 is formed.

[0015] As shown in Fig. 3(a), in the middle part of the floor panel 2 in the longitudinal direction of the vehicle body, there is a A bead 5 is formed which extends to. The bead 5 includes a front wall portion 5a, a bottom floor portion 5b, and It is formed from the rear wall portion 5c and bulges downward from the floor panel 2. And the bead 5 extends from the side edge of the floor panel 2 where the flange 2a is formed to the tunnel portion 4 It has been extended to.

[0016] As shown in FIG. 1, the side sill 6 extends along the side edges of the floor panel It is extended in the rear direction. The side sill 6 has an outer panel 6a and an inner panel 6b. constitutes a closed section. In addition, the flange 2a on the side edge of the floor panel 2 is It is welded to the inner panel 6b of the sill 6. Floor panel 2 is a mount bracket The chassis frame 3 is attached via the rubber mount 8 and chassis bracket 9. It is supported to mount.

As shown in FIG. 3(b), the mount bracket 7 is formed from a front part 7a, a side part 7b, a rear part 7c, and a top part 7d. Flanges 7e and 7f continuous from 7c are provided, respectively. As clearly shown in FIG.
e is welded and fixed to the front wall portion 5a of the bead 5, the flange 7f to the rear wall portion 5c of the bead 5, and the upper surface portion 7d to the bottom floor portion 5b of the bead 5, respectively. Further, as shown in FIG. 1, the side surface portion 7b of the mount bracket is welded to the inner panel 6b of the side sill 6.

[0018] As shown in FIG. 3(c), the chassis bracket 9 has an upper surface portion 9a and a peripheral edge of the upper surface portion 9a. A peripheral wall portion 9b extending downward, and a flange continuous from the upper surface portion 9a and the peripheral wall portion 9b. The flange 9c is welded to the chassis frame 3. The chassis frame 3 is made up of two panels 3a and 3b each having a U-shaped cross section and welded to each other. , forming a closed cross section. In addition, as shown in Figures 3(a) to (c), the bottom floor of bead 5 part 5b, the upper surface part 7d of the mount bracket 7, and the upper surface part 9a of the chassis bracket 9. A bolt insertion hole 10 is formed in each.

[0019] Then, as shown in FIGS. 1 and 2, the floor panel 2 is welded to the bead 5. It is welded to the chassis frame 3 via the attached mount bracket 7 and rubber mount 8. It is fixed to the chassis bracket 9 with bolts 11a and nuts 11b. Ru.

[0020] As mentioned above, in this embodiment, the bead 5 extends from the side sill 6 to the tunnel part 4. The side part of the mount bracket 7 is further welded to the side sill 6. This effectively increases the rigidity of the floor panel 2 around the mount support. I'm doing it.

[0021] The above is an explanation of the lower body structure of an automobile according to the present invention based on one embodiment. However, the automobile lower body structure according to the present invention is not limited to such embodiments. There isn't.

[0022] For example, in the above embodiment, the bead has a shape that bulges downward from the floor panel. However, it is also possible to form the bead into a shape that bulges inward into the vehicle interior.

[0023] Furthermore, in the above embodiment, the chassis frame is connected to the floor panel via the chassis bracket. The chassis frame is mounted and supported on the chassis frame without going through the chassis bracket. It is also possible to mount and support the panel.

[0024] Also, the shape and connection method of the mount bracket, the length of the bead, etc. will vary depending on the vehicle. It is possible to change it as appropriate.

[Brief explanation of drawings]

[Fig. 1] A sectional view taken along line II in Fig. 4 showing the structure of the lower body structure of an automobile according to an embodiment of the present invention.

[Fig. 2] A sectional view taken along line II-II in Fig. 1 showing the configuration of a mount support portion of a lower vehicle body structure of an automobile according to an embodiment of the present invention.

FIG. 3 is an external perspective view showing each component of the mount support portion of the lower body structure of an automobile according to an embodiment of the present invention;

FIG. 4 is an external perspective view schematically showing a part of a vehicle body equipped with a lower vehicle body structure of an automobile according to an embodiment of the present invention.

[Explanation of symbols]

2 Floor panel 3 Chassis frame 5 Bead 6 Side sill 7 Mount bracket

Claims (2)

[Scope of utility model registration request] Claims: 1. A floor panel constituting a vehicle body floor, in which a bead extending in the vehicle width direction is formed at an intermediate portion in the vehicle longitudinal direction; 1. A lower body structure for an automobile, comprising: a mounting bracket provided with a mount bracket; and a chassis frame that mounts and supports the floor panel via the mount bracket. 2. The lower part of an automobile according to claim 1, wherein a side portion of the mount bracket is coupled to a side sill extending in the longitudinal direction of the vehicle body along a side edge portion of the floor panel. Vehicle structure.