Vehicle body under structure

Abstract

The utility model provides a lower structure of a vehicle body. The lower structure of the vehicle body is light and rigid. A vehicle body lower structure includes: an inner fender having a wall surface extending in a vehicle height direction; a bottom cover adjacent to the inner fender and covering a lower portion of the vehicle body, in which the bottom cover includes a cover body portion forming a lower surface of the bottom cover and a vertical wall portion extending upward along a wall surface; and a sub-frame provided above the undercover, the vehicle body lower structure further having a first fastening portion that connects and fastens the vertical wall portion of the undercover, the wall surface of the inner fender, and the sub-frame.

Description

Technical Field

[0001] This utility model relates to a vehicle body lower structure. Background Technology

[0002] In recent years, research and development related to lightweighting that contributes to energy efficiency has been underway in order to ensure access to affordable, reliable, sustainable and advanced energy for more people.

[0003] Among the inventions described in existing technical documents, prior art document 1 discloses a structure for fastening the underbody to the subframe, while prior art document 2 discloses a structure for fastening the underbody, sound-absorbing wall, and inner fender. However, in the prior art structures, the underbody is fixed by brackets of surrounding components, and the installation of brackets often leads to an increase in the number of parts and weight.

[0004] This project aims to address the aforementioned issues by achieving lightweighting. Furthermore, it contributes to energy efficiency.

[0005] [Existing technical documents]

[0006] [Patent Literature]

[0007] [Patent Document 1] Japanese Patent Publication No. 3535047

[0008] [Patent Document 2] Japanese Patent Publication No. 2010-052660 Utility Model Content

[0009] This utility model provides a vehicle body lower structure that is both lightweight and rigid.

[0010] This utility model provides a vehicle body lower structure. The vehicle body lower structure includes: an inner mudguard having a wall extending along the vehicle height direction; a bottom cover adjacent to the inner mudguard and covering the lower part of the vehicle body, wherein the bottom cover includes a cover body part and a vertical wall part, the cover body part forming the lower surface of the bottom cover, and the vertical wall part extending upward along the wall surface; and a subframe disposed above the bottom cover, and the vehicle body lower structure also has a first fastening part connecting the vertical wall part of the bottom cover, the wall of the inner mudguard, and the subframe for fastening.

[0011] In one embodiment of the present invention, the inner mudguard has the extension portion, which extends from the lower end of the wall surface to the lower part of the bottom cover, and the lower part of the vehicle body structure also has a second fastening portion for fastening the extension portion to the cover portion.

[0012] In one embodiment of the present invention, the aforementioned vertical wall portion has multiple ridges extending in the vehicle height direction, and the first fastening portion is disposed between the multiple ridges.

[0013] In one embodiment of the present invention, a plurality of the second fastening portions are provided, and the plurality of second fastening portions are arranged relative to the first fastening portion in a manner that spans a plurality of the aforementioned ridge lines.

[0014] Based on the above, in the vehicle body lower structure of this utility model, by configuring the vertical wall of the bottom cover, the wall of the inner mudguard and the first fastening part of the subframe, it is not necessary to install a bracket for fixing the bottom cover, thereby suppressing the increase in the number and weight of parts, which is conducive to the lightweighting of the vehicle body lower structure while taking into account rigidity.

[0015] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a plan view of the lower structure of a vehicle body according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the vicinity of the first fastening part of the lower structure of the vehicle body shown;

[0018] Figure 3A yes Figure 2 The diagram shows a cross-sectional view of the lower structure of the vehicle body;

[0019] Figure 3B yes Figure 3A An enlarged schematic diagram of the area near the first fastening part is shown;

[0020] Figure 4A yes Figure 1 A three-dimensional schematic diagram of the base shown;

[0021] Figure 4B yes Figure 4A An enlarged schematic diagram of the area near the vertical wall of the base shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100: Lower structure of the vehicle body

[0024] 110: Inner mudguard

[0025] 111: Wall

[0026] 112: Extension

[0027] 120: Base Cover

[0028] 121: Cover body section

[0029] 122: Wall vertical part

[0030] 130: Subframe

[0031] 140: First fastening part

[0032] 150: Second fastening part

[0033] RL: Edge. Detailed Implementation

[0034] Figure 1 This is a plan view of the lower structure of a vehicle body according to an embodiment of the present utility model; Figure 2 yes Figure 1 A three-dimensional schematic diagram of the vicinity of the first fastening part of the lower structure of the vehicle body shown; Figure 3A yes Figure 2 The diagram shows a cross-sectional view of the lower structure of the vehicle body; Figure 3B yes Figure 3A An enlarged schematic diagram of the area near the first fastening part is shown; Figure 4A yes Figure 1 A three-dimensional schematic diagram of the base shown; Figure 4B yes Figure 4A This is an enlarged schematic diagram of the area near the vertical wall of the bottom cover. It should be noted that, for convenience, the front-to-back, left-to-right, and up-down directions of the vehicle are defined as shown in the figure, and the composition of each part will be described according to these definitions. The front-to-back, left-to-right, and up-down directions correspond to the vehicle's length, width, and height directions, respectively. In this embodiment, the lower body structure 100 is shown as an example of the bottom structure located near the rear tires, but the invention is not limited to this. In other embodiments, the lower body structure 100 can also be the bottom structure located near the front tires. The following will use... Figures 1 to 4B This describes the specific structure of the lower structure 100 of the vehicle body.

[0035] Please refer to Figures 1 to 4B In this embodiment, the lower body structure 100 includes an inner mudguard 110, a bottom cover 120, a subframe 130, and a first fastening part 140. For example... Figure 2 and Figure 3A As shown, in this embodiment, the subframe 130 is disposed above the underbody 120, the inner mudguard 110 has a wall 111 extending along the vehicle height direction, and the underbody 120 is adjacent to the inner mudguard 110 and covers the lower part of the vehicle body. Furthermore, as... Figures 3A to 4B As shown, the bottom cover 120 includes a cover body portion 121 and a vertical wall portion 122. The cover body portion 121 forms the lower surface of the bottom cover 120, and the vertical wall portion 122 extends upward along the wall surface 111 of the inner mudguard 110. Furthermore, as... Figure 3A and Figure 3B As shown, the first fastening part 140 connects the vertical wall portion 122 of the bottom cover 120, the wall surface 111 of the inner mudguard 110, and the subframe 130 for fastening. For example, as Figure 3A and Figure 3B As shown, in this embodiment, the first fastening part 140 can be a threaded fastener. In this way, by fastening the vertical wall part 122 of the bottom cover 120, the wall surface 111 of the inner mudguard 110 and the first fastening part 140 of the subframe 130, it is not necessary to install a bracket for fixing the bottom cover 120, thereby suppressing the increase in the number and weight of parts.

[0036] In addition, such as Figure 3A As shown, in this embodiment, the inner mudguard 110 has an extension 112, which extends from the lower end of the wall surface 111 of the inner mudguard 110 toward the lower part of the bottom cover 120, and as... Figure 4B As shown, the lower body structure 100 also has a second fastening portion 150 for fastening the extension 112 of the inner mudguard 110 to the cover portion 121 of the bottom cover 120. For example, in this embodiment, the second fastening portion 150 may also be a threaded fastener. Thus, the bottom cover 120 can be supported from below by the arrangement of the extension 112 of the inner mudguard 110.

[0037] On the other hand, such as Figure 4B As shown, in this embodiment, the vertical wall portion 122 of the base cover 120 is formed with multiple surfaces and has multiple ridges RL extending in the vehicle height direction. The first fastening portion 140 is disposed between the multiple ridges RL formed between the multiple surfaces of the vertical wall portion 122. Thus, by forming the vertical wall portion 122 of the base cover 120 with multiple surfaces and disposing the first fastening portion 140 between the ridges RL formed between the multiple surfaces, the strength of the vertical wall portion 122 of the base cover 120 and the first fastening portion 140 can be improved. Furthermore, as... Figure 4B As shown, in this embodiment, multiple second fastening portions 150 are provided, and the multiple second fastening portions 150 are arranged relative to the first fastening portion 140 in a manner that crosses multiple ridge lines RL. In this way, by arranging the second fastening portions 150 in a manner that crosses the ridge lines RL extending from the first fastening portion 140, the structural strength can be further improved compared to when the second fastening portions 150 are located inside the ridge lines RL.

[0038] In summary, in the vehicle body lower structure of this utility model, by configuring the vertical wall of the bottom cover, the wall of the inner mudguard, and the first fastening part of the subframe, it is not necessary to install a bracket for fixing the bottom cover, thereby suppressing the increase in the number and weight of parts, which is conducive to the lightweighting of the vehicle body lower structure while also ensuring rigidity.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vehicle body lower structure, characterized in that, include: The inner mudguard has a wall extending along the vehicle height direction; A bottom cover, adjacent to the inner mudguard and covering the lower part of the vehicle body, wherein the bottom cover includes a cover body portion and a vertical wall portion, the cover body portion forming the lower surface of the bottom cover, and the vertical wall portion extending upward along the wall surface; as well as The subframe is located above the underbody, and The lower structure of the vehicle body also has a first fastening part that connects the vertical wall portion of the underbody, the wall surface of the inner mudguard, and the subframe for fastening.

2. The vehicle body lower structure according to claim 1, characterized in that, The inner mudguard has an extension that extends from the lower end of the wall surface toward the underside of the base cover, and The lower structure of the vehicle body also has a second fastening part that secures the extension to the cover.

3. The vehicle body lower structure according to claim 2, characterized in that, The vertical wall section has multiple ridges extending in the vehicle height direction. The first fastening part is disposed between the plurality of said ridges.

4. The vehicle body lower structure according to claim 3, characterized in that, The second fastening part is provided in multiple parts. The plurality of second fasteners are configured relative to the first fastener in a manner that spans the plurality of said ridge lines.

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