Vehicle under structure

Abstract

The utility model provides a lower structure of a vehicle. The vehicle lower structure includes: a front vehicle body undercover that constitutes a lower surface of a vehicle front portion; a middle underbody cover disposed on the vehicle rear side of the front underbody cover with a space therebetween; and a movable underbody cover disposed across the front underbody cover and the middle underbody cover, in the storage state, the movable underbody cover is arranged in a straight line shape when the vehicle is viewed from the side, and in the unfolded state, the movable underbody cover is in a convex shape towards the lower side when the vehicle is viewed from the side, and the deformation part is arranged on the vehicle front side of the front wheels and is closer to the lower side of the vehicle than in the storage state. A front side connecting part connected with the front vehicle body undercover is rotatably connected with the vehicle width direction as the axial direction, and a rear side connecting part is rotatably connected with the vehicle width direction as the axial direction and slidably connected in the front-rear direction of the vehicle within the range overlapped with the middle vehicle body undercover in the upward view of the vehicle.

Description

Technical Field

[0001] This utility model relates to a vehicle substructure. Background Technology

[0002] Patent Document 1 discloses a vehicle aerodynamic device. This device comprises wheel shrouds and a drive unit. The wheel shrouds are deployed towards the front of the vehicle's front wheels by rotating in an unfolding direction and are retracted into the vehicle body by rotating in a retracting direction. The drive unit deploys the wheel shrouds. In the technology described in Patent Document 1, deploying the wheel shrouds reduces the impact of wind on the front wheels, and storing the wheel shrouds ensures minimal ground clearance.

[0003] Prior art literature

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2023-095561 Utility Model Content

[0006] The problem to be solved by the utility model

[0007] However, in the aforementioned technology, since the front wheel periphery is opened when the wheel drag reduction fairing is deployed, there is a possibility that the desired aerodynamic characteristics cannot be obtained. Therefore, there is room for improvement in enhancing the aerodynamic characteristics around the front wheels while ensuring the vehicle's minimum ground clearance.

[0008] In view of the above facts, the purpose of this invention is to obtain a vehicle underbody structure that can improve the aerodynamic characteristics around the front wheels while ensuring the minimum ground clearance of the vehicle.

[0009] Methods for solving problems

[0010] Technical solution 1 describes a vehicle lower structure comprising: a front body cover forming the lower surface of the front of the vehicle; a middle body cover disposed at intervals on the rear side of the front body cover; and a movable body cover disposed across the front body cover and the middle body cover, extending from one end in the vehicle width direction to the other, and having a deformable portion at the center in the vehicle longitudinal direction, and capable of being in a stored state and an unfolded state. The stored state is characterized by the movable body cover being arranged in a straight line when viewed from the side of the vehicle, and the unfolded state is characterized by the movable body cover being... When viewed from the side of the vehicle, the cover has a convex shape on the lower side and the deformable part is positioned on the front side of the vehicle, closer to the lower side of the vehicle than in the stored state. In the movable body cover, one of the front connecting part connected to the front body cover and the rear connecting part connected to the middle body cover is rotatably connected axially in the vehicle width direction, and the other of the front connecting part and the rear connecting part is rotatably connected axially in the vehicle width direction. Furthermore, when viewed from below the vehicle, the cover is slidably connected in the vehicle longitudinal direction within the area overlapping with the front body cover or the middle body cover.

[0011] According to the present invention described in technical solution 1, the movable body underbody is configured to span across the front body underbody, which forms the lower surface of the front of the vehicle, and between the front body underbody and the intermediate body underbody, which is disposed on the rear side of the vehicle, and extends from one end in the vehicle width direction to the other. That is, the movable body underbody forms the lower surface of the vehicle between the front body underbody and the intermediate body underbody.

[0012] The movable body underbody can be deformed by having a deformable section at the center of the vehicle in the longitudinal direction, thereby achieving a stored state and an deployed state. The movable body underbody is stored (in the stored state) by being configured in a straight line when viewed from the side of the vehicle. This ensures a high minimum ground clearance. On the other hand, when the deformable section is positioned lower on the vehicle side when viewed from the side of the vehicle compared to the stored state, the movable body underbody is deployed in a downwardly convex shape (in the deployed state).

[0013] The movable body underbody is connected to the front body underbody at the front connecting part and to the middle body underbody at the rear connecting part. One of the front and rear connecting parts is rotatably connected axially in the vehicle width direction, and the other of the front and rear connecting parts is rotatably connected axially in the vehicle width direction and slidably connected in the vehicle longitudinal direction. Therefore, by rotating one of the front and rear connecting parts axially in the vehicle width direction from the stored state, and by sliding the other of the front and rear connecting parts towards one side while rotating axially in the vehicle width direction, the deformable part moves towards the lower side of the vehicle and unfolds into a downward convex shape (becoming the unfolded state).

[0014] When the vehicle is in motion, the airflow passing under the front body cover and moving towards the rear of the vehicle comes into contact with the portion of the movable body cover that is closer to the front of the vehicle than the deformable section, and is guided towards the lower side of the vehicle. The deformable section, in its deployed state, is positioned at the front of the front wheels. Therefore, by deploying the movable body cover while the vehicle is in motion, the inflow of airflow towards the wheel wells can be suppressed, thereby improving the aerodynamic characteristics around the front wheels.

[0015] Furthermore, the other of the front and rear connecting portions is slidably connected in the longitudinal direction of the vehicle within the area overlapping with the front or middle body cover when viewed from below. Therefore, when the front connecting portion is slidably connected to the front body cover, the front connecting portion slides when the front connecting portion of the front body cover and the movable body cover overlaps when viewed from below. Similarly, when the rear connecting portion is slidably connected to the middle body cover, the rear connecting portion slides when the rear connecting portion of the middle body cover and the movable body cover overlaps when viewed from below. In other words, the movable body cover is deployed without creating a gap between the front and middle body covers. Therefore, the reduction in aerodynamic characteristics caused by airflow entering a gap can be suppressed.

[0016] Utility Model Effect

[0017] As explained above, the vehicle substructure involved in this utility model has the following excellent effect: it can improve the aerodynamic characteristics around the front wheels. Attached Figure Description

[0018] Figure 1This is a longitudinal sectional view of the front of a vehicle that has applied the vehicle lower structure according to this embodiment, cut along the front-rear direction of the vehicle, and is a diagram showing the storage state of the movable body cover.

[0019] Figure 2 To indicate Figure 1 The longitudinal sectional view shown is of the movable body underbody in its unfolded state. Detailed Implementation

[0020] The following uses Figure 1 as well as Figure 2 The following describes a vehicle substructure according to one embodiment of the present invention. In addition, the arrow FR and arrow UP, appropriately indicated in the accompanying drawings, respectively denote the front side and upper side of the vehicle to which the vehicle substructure is applied. Furthermore, in the following description, unless otherwise specified, the directions front-back, up-down, and left-right are used to represent front-back in the front-back direction, up-down in the up-down direction, and left-right in the left-right direction (width direction), respectively.

[0021] exist Figure 1 The image shows a longitudinal sectional view of the front portion 14 of a vehicle 12, which incorporates the vehicle lower structure according to this embodiment, cut along the longitudinal direction of the vehicle and viewed from the left side of the vehicle. Figure 1 As shown, the vehicle 12 includes a front body cover 16 that forms the lower surface of the front part 14, and a middle body cover 18 that is disposed at a distance from the front body cover 16 on the rear side of the vehicle. The front end 18A of the middle body cover 18 is disposed at a position that overlaps approximately with the center of the front wheel 20 when viewed from the side of the vehicle.

[0022] A movable body cover 22 is disposed between the front body cover 16 and the middle body cover 18. The movable body cover 22 is configured to span across the front body cover 16 and the middle body cover 18 in the longitudinal direction of the vehicle. The movable body cover 22 is capable of... Figure 1 The storage status shown, and Figure 2 Move between the shown unfolded states.

[0023] The movable body underbody cover 22 is configured to include a front side cover 24 and a rear side cover 26. The front side cover 24 is connected to the front body underbody cover 16 and extends from one end in the vehicle width direction to the other end. The rear side cover 26 is connected to the middle body underbody cover 18 and extends from one end in the vehicle width direction to the other end. Both the front side cover 24 and the rear side cover 26 are formed into a generally rectangular plate shape when viewed from above.

[0024] Furthermore, the movable body cover 22 has a deformable portion 28 at its center in the longitudinal direction of the vehicle. The deformable portion 28 is made of flexible resin and is formed as a strip extending in the width direction of the vehicle. The deformable portion 28 is fixed to the lower surface of the rear end portion 24A of the front side cover 24 and the lower surface of the front end portion 26A of the rear side cover 26, thereby connecting the front side cover 24 and the rear side cover 26 in the longitudinal direction of the vehicle. As a result, no gap is generated between the front side cover 24 and the rear side cover 26 when the vehicle is viewed from below.

[0025] The front end portion 24B of the front side cover 24 is rotatably connected to the rear end portion 16A of the front body cover 16 with the vehicle width direction as the axis. Specifically, a pair of left and right bearings 30 are fixed at both ends in the vehicle width direction on the lower surface side of the rear end portion 16A of the front body cover 16. (The bearing on the left side of the vehicle is not shown in the figure.)

[0026] Furthermore, a front support shaft 32 along the vehicle width direction is provided at the front end portion 24B of the front cover 24. The front support shaft 32 is mounted on a pair of left and right bearings 30, thereby allowing the front cover 24 to rotate around the front support shaft 32 while being supported by the bearings 30. In addition, the front end portion 24B of the front cover 24 corresponds to the front connecting portion in this utility model.

[0027] Furthermore, the rear end portion 26B of the rear side cover 26 is rotatably and slidably connected to the front end portion 18A of the intermediate body cover 18 in a direction axially oriented about the vehicle width. Specifically, on the lower surface side of the front end portion 18A of the intermediate body cover 18, a pair of left and right guide rails 34 are fixed at both ends in the vehicle width direction (the guide rail on the left side of the vehicle is not shown in the figure). The guide rails 34 extend in the vehicle longitudinal direction and have groove portions 34A along this direction on the inner side in the vehicle width direction (see reference). Figure 2 ).

[0028] Furthermore, a rear support shaft 36 is provided at the rear end portion 26B of the rear side cover 26, extending along the vehicle width direction. Both ends of the rear support shaft 36 are supported by a pair of left and right guide rails 34 in a slidable and rotatable manner. The guide rails 34 are configured such that their front ends are positioned approximately at the same level as the front end of the intermediate body underbody cover 18. Thus, the rear support shaft 36 slides within the groove portion 34A within the area overlapping with the intermediate body underbody cover 18 when the vehicle is viewed from below. Additionally, the rear end portion 26B of the rear side cover 26 corresponds to the rear connecting portion in this invention.

[0029] exist Figure 1 In the storage state shown, the rear support shaft 36 is located in the groove portion 34A of the guide rail 34 (see reference). Figure 2At the rear end of the vehicle. In this state, the front side cover 24 and the rear side cover 26 are approximately horizontal, and the movable body bottom cover 22 is configured as a straight line when viewed from the side of the vehicle.

[0030] On the other hand, Figure 2 In the unfolded state shown, the rear support shaft 36 is located at the front end of the groove portion 34A of the guide rail 34. At this time, the deformable portion 28 is positioned on the vehicle front side of the front wheel 20. Furthermore, in the unfolded state, the deformable portion 28 is positioned on the lower side of the vehicle compared to the stored state. As a result, in the unfolded state, the movable body cover 22 becomes a convex shape when viewed from the side of the vehicle.

[0031] In this embodiment, as an example, the movable body cover 22 is moved from a stored state to an deployed state via a control device (not shown) when the vehicle 12's speed exceeds 70 km / h. Furthermore, when the vehicle 12 stops, the movable body cover 22 is returned from the deployed state to the stored state via the same control device. However, the conditions for controlling the movable body cover 22 are not limited to the above. For example, the movable body cover 22 can also be deployed when the vehicle 12 is traveling on a highway, and stored in other situations.

[0032] like Figure 1 as well as Figure 2 As shown, in both the stored and deployed states, the gap between the front body cover 16 and the middle body cover 18 is covered by the movable body cover 22. In other words, the lower surface of the vehicle 12 is always covered regardless of the state of the movable body cover 22.

[0033] (effect)

[0034] Next, the function of this embodiment will be explained.

[0035] According to the vehicle lower structure involved in this embodiment, the movable body cover 22 forms the lower surface of the vehicle 12 between the front body cover 16 and the middle body cover 18.

[0036] like Figure 1 As shown, the movable body underbody 22 is stored (in a stored state) by being configured in a straight line when viewed from the side of the vehicle. This ensures minimal ground clearance.

[0037] On the other hand, such as Figure 2As shown, when the speed of vehicle 12 exceeds 70 km / h, the movable body cover 22 is deployed. At this time, the front end 24B of the front side cover 24 rotates axially about the vehicle width direction. Furthermore, the rear end 26B of the rear side cover 26 slides towards the front of the vehicle while rotating axially about the vehicle width direction. As a result, the rear end 24A of the front side cover 24, the front end 26A of the rear side cover 26, and the deformable part 28 move towards the lower side of the vehicle. In this way, the movable body cover 22 is deployed (in the deployed state) in a downwardly convex shape.

[0038] The front side cover 24 of the deployed movable body underbody cover 22 slopes downwards towards the rear of the vehicle. As a result, the airflow passing under the front body underbody cover 16 and moving towards the rear of the vehicle 12 during travel touches the front side cover 24 of the deployed movable body underbody cover 22 and is guided downwards towards the vehicle. The deformable part 28 is positioned at the front of the front wheel 20 in the deployed state. Therefore, by deploying the movable body underbody cover 22 during vehicle travel, the inflow of airflow towards the wheel arches (not shown) can be suppressed, thereby improving the aerodynamic characteristics around the front wheel 20.

[0039] Furthermore, the guide rail 34 is configured such that its front end is positioned approximately the same as the front end of the intermediate body cover 18, allowing the rear support shaft 36 to slide within the area overlapping with the intermediate body cover 18 when the vehicle is viewed from below. Thus, in both the stored and deployed states, the gap between the front body cover 16 and the intermediate body cover 18 is covered by the movable body cover 22. In other words, the lower surface of the vehicle 12 is always covered regardless of the state of the movable body cover 22. Therefore, the reduction in aerodynamic characteristics caused by airflow entering the gap can be suppressed.

[0040] [Supplementary Explanation of the Above-described Embodiments]

[0041] In the above embodiment, the rear end portion 26B of the rear side cover 26 is slidably connected to the middle vehicle body cover 18, but it is not limited to this. The front side connecting portion can also be slidably connected to the front vehicle body cover.

[0042] Furthermore, in the above embodiment, the movable vehicle body cover 22 was described as having a front side cover 24 and a rear side cover 26, and the front side cover 24 and the rear side cover 26 were connected by a flexible deformable part 28, but it is not limited to this. For example, the movable vehicle body cover may have three plate-shaped members arranged in the front-rear direction, and these plate-shaped members may be connected by a linkage mechanism, so that the movable vehicle body cover becomes convex downward when it is in the unfolded state. Alternatively, the movable vehicle body cover may be constructed from a single flexible member.

[0043] Symbol Explanation

[0044] 12…vehicle; 14…front; 16…front body cover; 18…middle body cover; 20…front wheel; 22…movable body cover; 24B…front end of front side cover (front side connection); 26B…rear end of rear side cover (rear side connection); 28…deformable part.

Claims

1. A vehicle substructure, characterized in that, have: The front body cover forms the lower surface of the front of the vehicle; The middle body cover is positioned at intervals on the rear side of the front body cover; A movable body underbody is configured to span across the front body underbody and the middle body underbody, extending from one end in the vehicle width direction to the other. It has a deformable portion at the center in the vehicle's longitudinal direction and can be configured in a stored state and an unfolded state. In the stored state, the movable body underbody is configured in a straight line when viewed from the side of the vehicle. In the unfolded state, the movable body underbody becomes convex downwards when viewed from the side of the vehicle, and the deformable portion is positioned on the vehicle's lower side, in front of the front wheels, compared to the stored state. In the movable body cover, one of the front connecting part connected to the front body cover and the rear connecting part connected to the middle body cover is rotatably connected axially in the vehicle width direction, and the other of the front connecting part and the rear connecting part is rotatably connected axially in the vehicle width direction, and is slidably connected in the vehicle front-rear direction within the range overlapping with the front body cover or the middle body cover when the vehicle is viewed from below.

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