Vehicle underbody structure

Abstract

The invention provides a vehicle bottom structure which has better impact absorption efficiency and a light weight structure. A vehicle underbody structure includes a floor panel, and a lower cover covering a lower portion of the floor panel in a vehicle up-down direction, the lower cover including: a floor plate provided on an outer side in the vehicle underbody structure; and a reinforcement member which is provided between the floor panel and the floor panel in the vertical direction of the vehicle and close to the center side of the floor panel in the width direction of the vehicle, and which extends in the front-rear direction of the vehicle.

Description

Technical Field

[0001] The invention relates to a vehicle bottom structure. Background Art

[0002] In order to allow the elderly, the disabled, and children, who are relatively vulnerable groups, to use a sustainable transportation system, we are committed to providing a means of transportation with better body rigidity. In the existing technology, the bottom structure of the vehicle includes a cover that covers the power components such as the motor and the transmission shaft, and the cover has high rigidity and torsion resistance. However, the space between the cover and the body is not used, making it more difficult to absorb the impact as a whole. The present invention aims to solve the above-mentioned problems and improve the rigidity of the body, and further hopes to provide a sustainable transportation system. Summary of the invention

[0003] The invention provides a vehicle bottom structure with better impact absorption efficiency and a lightweight structure.

[0004] The vehicle bottom structure of the present invention includes: a floor panel and a lower cover covering the lower side of the floor panel in the vehicle vertical direction, the lower cover including: a bottom plate arranged on the outer side of the vehicle bottom structure; and a reinforcing member arranged between the bottom plate and the floor panel in the vehicle vertical direction and close to the center side of the bottom plate in the vehicle width direction, the reinforcing member extending along the vehicle front-rear direction.

[0005] In an embodiment of the present invention, the vehicle bottom structure also includes a driving element and a transmission shaft, and the driving element and the transmission shaft are arranged inside the lower cover and close to the inner side in the front-rear direction of the vehicle. The lower cover also includes a driving element contact portion and a transmission shaft contact portion, and the driving element contact portion and the transmission shaft contact portion are arranged at positions close to the driving element and the transmission shaft, and the interior of the lower cover is formed into a concave shape corresponding to the driving element and the transmission shaft.

[0006] In an embodiment of the present invention, the lower cover further includes a driving element covering portion covering a lower portion of the driving element in the vehicle up-down direction, and the driving element covering portion extends along the vehicle front-rear direction.

[0007] In an embodiment of the present invention, the lower cover is a honeycomb structure.

[0008] Based on the above, in the vehicle bottom structure of the present invention, the space between the vehicle body (floor panel) and the lower cover is effectively utilized to set the reinforcement, thereby increasing the impact absorption efficiency against rear impacts. While the impact absorption efficiency is increased, the number of surrounding frame components can be reduced and the material can be lightweight, thereby reducing costs. In addition, since the increase in overall rigidity can suppress the deflection or deformation of the lower cover, the aerodynamics of the bottom of the vehicle can also be optimized. Moreover, since the weight of the lower cover is increased, the vibration of the vehicle body (floor panel) can be suppressed. Accordingly, the vehicle bottom structure of the present invention has better impact absorption efficiency and a lightweight structure.

[0009] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional schematic diagram of a vehicle bottom structure according to an embodiment of the present invention.

[0011] Figure 2 yes Figure 1 A partial schematic diagram of the lower cover of the vehicle bottom structure.

[0012] Description of Reference Numerals

[0013] 100: vehicle bottom structure;

[0014] 110: Floor panel;

[0015] 120: lower cover;

[0016] 121: bottom plate;

[0017] 122: reinforcement;

[0018] 123: driving element contact portion;

[0019] 124: transmission shaft contact portion;

[0020] 125: driving element covering portion;

[0021] 130: driving element;

[0022] 140: transmission shaft;

[0023] X: vehicle width direction;

[0024] Y: front and rear direction of the vehicle;

[0025] Z: The vehicle's up and down direction. DETAILED DESCRIPTION

[0026] Figure 1It is a three-dimensional schematic diagram of a vehicle bottom structure according to an embodiment of the present invention. Figure 2 yes Figure 1 A partial schematic diagram of the lower cover of the vehicle bottom structure. In this embodiment, the vehicle bottom structure 100 is, for example, a portion applied to the rear part of the chassis of the vehicle, and is particularly used to cover structures such as a drive device disposed at the bottom of the vehicle, but the present invention is not limited thereto. The vehicle width direction X, the vehicle front-to-rear direction Y, and the vehicle up-down direction Z in the accompanying drawings are not used to limit the positional relationship of the components in the present invention. Whenever possible, the same element symbols are used in the drawings and descriptions to indicate the same or similar parts. The following will be used in conjunction with Figure 1 and Figure 2 A vehicle bottom structure 100 according to the present embodiment will be described.

[0027] Please refer to Figure 1 and Figure 2 In this embodiment, the vehicle bottom structure 100 includes a floor panel 110 and a lower cover 120 covering the lower part of the floor panel 110 in the vehicle vertical direction Z. The lower cover 120 is, for example, disposed at the rear part of the vehicle body in the vehicle longitudinal direction Y, but may also be disposed at the front part of the vehicle body in the vehicle longitudinal direction Y, and may be adjusted according to actual needs, and the present invention is not limited thereto. Figure 2 As shown, the lower cover 120 is, for example, a four-corner honeycomb structure, so as to improve the impact absorption efficiency. In other examples not shown, the lower cover 120 can also be a pentagonal, hexagonal or other suitable shape, as long as it can improve the impact absorption efficiency and easily control the deformation state, so as to improve the degree of freedom of design.

[0028] Furthermore, the lower cover 120 includes a bottom plate 121 and a reinforcement member 122. The bottom plate 121 is disposed on the outer side of the vehicle bottom structure 100. Specifically, the bottom plate 121 is disposed below the floor panel 110 in the vehicle vertical direction Z. Therefore, when the vehicle body is viewed upward from below in the vehicle vertical direction Z, the bottom plate 121 can be seen without being blocked by other components. The reinforcement member 122 is disposed between the bottom plate 121 and the floor panel 110 in the vehicle vertical direction Z and close to the center side of the bottom plate 121 in the vehicle width direction X. Furthermore, the reinforcement member 122 extends along the vehicle front-rear direction Y. Among them, the reinforcement member 122 is, for example, a convex strip, but it can also be other elements suitable for reinforcement, and the present invention is not limited to this.

[0029] It can be seen that in the vehicle bottom structure 100 of the present embodiment, the space between the vehicle body (floor panel 110) and the lower cover 120 is effectively utilized to set the reinforcement 122, thereby increasing the impact absorption efficiency against rear impacts. While the impact absorption efficiency is increased, the number of surrounding frame components can be reduced and the material can be lightweight, thereby reducing costs. In addition, since the increase in overall rigidity can suppress the deflection or deformation of the lower cover 120, the aerodynamics of the bottom of the vehicle can also be optimized. Moreover, since the weight of the lower cover 120 is increased, the vibration of the vehicle body (floor panel 110) can be suppressed. Accordingly, the vehicle bottom structure 100 of the present embodiment has better impact absorption efficiency and a lightweight structure.

[0030] Furthermore, in this embodiment, the vehicle bottom structure 100 further includes a driving element 130 and a transmission shaft 140. The driving element 130 and the transmission shaft 140 are disposed below the floor panel 110 in the vehicle vertical direction Z. Specifically, the driving element 130 and the transmission shaft 140 are disposed inside the lower cover 120 and close to the inner side in the vehicle front-rear direction Y (the inner side is relative to the outer edge of the vehicle body, and in this embodiment, it is the front side in the vehicle front-rear direction Y). The lower cover 120 is provided with a side wall extending along the vehicle vertical direction Z at the outer edge of the bottom plate 121. Therefore, the driving element 130 and the transmission shaft 140 are covered by the lower cover 120 and cannot be viewed from the outside of the vehicle body.

[0031] Furthermore, the lower cover 120 also includes a driving element contact portion 123 and a transmission shaft contact portion 124. The driving element contact portion 123 and the transmission shaft contact portion 124 are arranged at a position close to the driving element 130 and the transmission shaft 140. In detail, the driving element contact portion 123 and the transmission shaft contact portion 124 are opposite to the driving element 130 and the transmission shaft 140 in the vehicle front-rear direction Y, and the driving element contact portion 123 and the transmission shaft contact portion 124 are located behind the driving element 130 and the transmission shaft 140 in the vehicle front-rear direction Y. Furthermore, the interior of the lower cover 120 is formed into a concave shape corresponding to the driving element 130 and the transmission shaft 140, that is, the driving element contact portion 123 is concave relative to the transmission shaft contact portion 124 toward the rear side of the vehicle front-rear direction Y. Thus, when an impact occurs, the lower cover 120 can be pressed against the driving element 130 and the transmission shaft 140 more closely and crushed by the concave design corresponding to the driving element 130 and the transmission shaft 140, thereby achieving better impact absorption efficiency. The contact surfaces of the driving element contact portion 123 and the transmission shaft contact portion 124 are shown as planar, but in other examples not shown, they can also be in a shape that is more closely aligned with the driving element 130 and the transmission shaft 140, and the present invention is not limited thereto.

[0032] In addition, in this embodiment, the lower cover 120 further includes a driving element covering portion 125 covering the lower portion of the driving element 130 in the vehicle vertical direction Z. The driving element covering portion 125 extends along the vehicle front-rear direction Y to cover the entire driving element 130 without being exposed from a viewing angle in the vehicle vertical direction Z. In this way, the lower cover 120 can have both the functions of shock absorption and shielding the element.

[0033] In summary, in the vehicle bottom structure of the present invention, the space between the vehicle body (floor panel) and the lower cover is effectively utilized to set the reinforcement, thereby increasing the impact absorption efficiency against the impact from the rear side. While the impact absorption efficiency is increased, the number of surrounding frame components can be reduced and the material can be lightweight, thereby reducing costs. In addition, since the increase in overall rigidity can suppress the deflection or deformation of the lower cover, the aerodynamics of the bottom of the vehicle can also be optimized. Moreover, since the weight of the lower cover is increased, the vibration of the vehicle body (floor panel) can be suppressed. In addition, the lower cover also includes a drive element contact portion and a transmission shaft contact portion. When a collision occurs, the lower cover can be more closely pressed against the drive element and the transmission shaft and crushed by the concave design corresponding to the drive element and the transmission shaft, thereby having better impact absorption efficiency. Accordingly, the vehicle bottom structure of the present invention has better impact absorption efficiency and a lightweight structure.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle bottom structure, comprising: A floor panel, and a lower cover covering the lower side of the floor panel in the vehicle up-down direction, wherein the lower cover comprises: a bottom plate disposed on an outer side of the vehicle bottom structure; and The reinforcing member is provided between the floor panel and the floor panel in the vehicle vertical direction and close to the center of the floor panel in the vehicle width direction, and the reinforcing member extends in the vehicle front-rear direction.

2. The vehicle bottom structure according to claim 1, characterized in that: The vehicle bottom structure further includes a driving element and a transmission shaft, wherein the driving element and the transmission shaft are arranged inside the lower cover and close to the inner side in the front-rear direction of the vehicle. The lower cover also includes a driving element contact portion and a transmission shaft contact portion, which are arranged at positions close to the driving element and the transmission shaft, and the interior of the lower cover is formed into a concave shape corresponding to the driving element and the transmission shaft.

3. The vehicle bottom structure according to claim 2, characterized in that: The lower cover further includes a driving element covering portion that covers a lower portion of the driving element in the vehicle up-down direction, the driving element covering portion extending along the vehicle front-rear direction.

4. The vehicle bottom structure according to claim 1, characterized in that: The lower cover is a honeycomb structure.

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