CN211809913U

CN211809913U - Lower guard plate structure of automobile chassis

Info

Publication number: CN211809913U
Application number: CN202020217665.9U
Authority: CN
Inventors: 曾天微; 伍操; 向晖; 王文飞
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-10-30
Anticipated expiration: 2030-02-27

Abstract

The utility model discloses a backplate structure under vehicle chassis, backplate under the chassis, the downside of backplate is provided with a plurality of fairings, a plurality of from a left side to the right side interval under the chassis the fairing all is including connecting into holistic fairing anterior segment and fairing back end, the width scales up from the front to the back of fairing anterior segment, the fairing back end width is steadilyd decrease from the front to the back. The utility model provides a backplate structure under vehicle chassis can carry out the rectification to the high velocity air who gets into the car bottom, reduces the windage coefficient when the vehicle is high-speed to go, promotes the stability when the car is high-speed to go.

Description

Lower guard plate structure of automobile chassis

Technical Field

The utility model relates to the technical field of automobiles, concretely relates to backplate structure under vehicle chassis.

Background

The lower guard plate of the automobile chassis is a protection design commonly used for the lower automobile body of the automobile, and the lower guard plate mainly plays a role in wrapping the lower automobile body and a chassis part of the automobile body to protect the chassis part from being invaded by sand, stone, water flow and acid liquid, avoids the damage of a road surface to the automobile chassis or the lower automobile body, and prolongs the service lives of the chassis part and the lower automobile body. The design of the lower guard plate of the chassis of a plurality of vehicles in the current market only considers the protection effect on the chassis of the lower vehicle body, does not consider the aerodynamics and the vehicle running performance dynamics, does not have the good effects of reducing the wind resistance and the lifting force, and can not improve the stability of the vehicles running at high speed.

Disclosure of Invention

In view of this, the utility model aims at overcoming the defect among the prior art, providing under the vehicle chassis backplate structure, can carry out the rectification to the high velocity air who gets into the car bottom, the windage coefficient when reducing the vehicle and going at a high speed promotes the stability when the car goes at a high speed.

The utility model discloses a backplate structure under vehicle chassis, backplate under the chassis, the downside of backplate is provided with a plurality of fairings, a plurality of from a left side to the right side interval under the chassis the fairing all is including connecting into holistic fairing anterior segment and fairing back end, the fairing anterior segment width from the front to the back scales up, the fairing back end width from the front to the back steadilys decrease.

Further, a gap between every two adjacent rectifying parts is an airflow channel, and a flow guide part is arranged at the downstream of each airflow channel.

Further, the flow guide pieces are all of triangular wing surface structures.

Further, the middle part of the chassis lower guard plate is horizontally arranged, the rear part of the chassis lower guard plate extends upwards from the front to the back, the plurality of rectifying parts are arranged in the middle of the chassis lower guard plate, and the flow guide parts are arranged at the rear part of the chassis lower guard plate.

Further, the middle part of the chassis lower guard plate is horizontally arranged, the front part of the chassis lower guard plate extends upwards from back to front, and the plurality of rectifying pieces are arranged in the middle part of the chassis lower guard plate.

Furthermore, the front end of the front end part of the lower protection plate of the chassis is provided with an installation skirt edge, and a plurality of front installation through holes are formed in the installation skirt edge; the rear end part of the lower protective plate of the chassis is provided with a plurality of rear mounting through holes.

Further, the length of the fairing front section in the front-rear direction is smaller than the length of the fairing rear section in the front-rear direction.

Further, the corners of the front side, the left side and the right side of the fairing are rounded corners.

The utility model has the advantages that: the utility model discloses a lower protective plate structure of an automobile chassis, when a vehicle runs at a high speed, the lower protective plate of the chassis and four rectifying pieces can rectify the high-speed airflow entering the bottom of the automobile, eliminate various turbulences and turbulent flows caused by the airflow passing through a complex structure of the chassis, and reduce the wind resistance coefficient when the vehicle runs at a high speed; when the vehicle slightly deviates laterally due to road surface interference or driver operation errors, high-speed airflow is not rectified any more when passing through the rectifying part, but pressure is applied to one side of the rectifying part, the high-speed airflow impacts the side face of the rectifying part, and the rectifying part is positioned behind the mass center of the vehicle, so that a chassis lower guard plate generates aligning moment on the vehicle, and the aligning moment can work in cooperation with the aligning characteristic of the vehicle suspension; in summary, the stability of the automobile in high-speed running is remarkably improved.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural view after the utility model is turned over;

fig. 2 is a schematic structural view of the utility model at another viewing angle after turning;

fig. 3 is a front view of the present invention;

fig. 4 is a schematic diagram of the aligning moment generation of the present invention.

Description of reference numerals: 1-a lower chassis guard plate, 2-a mounting skirt edge, 3-a front mounting through hole, 4-a rear mounting through hole, 5-a rectifying part, 5 a-a front rectifying part section, 5 b-a rear rectifying part section, 6-a flow guide part and 7-a projection position of an automobile mass center on the lower chassis guard plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is the utility model discloses a schematic structure diagram, as shown in the figure, backplate structure under vehicle chassis in this embodiment, backplate 1 under the chassis, the downside of backplate 1 is provided with a plurality of fairings 5 from a left side to right side interval, and is a plurality of fairing 5 all is including connecting into holistic fairing anterior segment 5a and fairing back end 5b, fairing anterior segment 5a increases progressively from the front to the back width, fairing back end 5b decreases progressively from the front to the back width. In the specification, the directions of the vehicles are all referred to on a horizontal road surface, wherein front refers to the direction from the tail of the vehicle to the head of the vehicle, rear refers to the direction from the head of the vehicle to the tail of the vehicle, upper refers to the direction from the bottom of the vehicle to the roof of the vehicle, lower refers to the direction from the roof of the vehicle to the bottom of the vehicle, left refers to the left side of a driver, and right refers to the right side of the driver; for convenience of illustration, fig. 1 and 2 are both illustrated as the inverted structure of the present invention, and thus the upper and lower, left and right sides of fig. 1 and 2 are reversed. In this embodiment, four rectifying pieces 5 are arranged, and the positions of the four rectifying pieces 5 are all located behind the mass center of the automobile, and the rectifying pieces 5 can be fixed by directly welding on the chassis lower protective plate 1 or by arranging a clamping structure to be clamped with the chassis lower protective plate 1; when a vehicle runs at a high speed, the chassis lower guard plate 1 and the four rectifying pieces 5 can rectify high-speed airflow entering the bottom of the vehicle, eliminate various turbulences and turbulent flows caused by the airflow passing through a chassis complex structure, and reduce the wind resistance coefficient when the vehicle runs at a high speed; moreover, when the vehicle slightly deviates laterally due to road surface interference or driver operation errors, as shown in fig. 4, the high-speed airflow is not rectified any more when passing through the rectifying part 5, but pressure is applied to one side of the rectifying part 5, the high-speed airflow impacts the side surface of the rectifying part 5 along the arrow direction in fig. 4, and the rectifying part 5 is positioned behind the mass center of the vehicle, so that the chassis lower protective plate 1 can generate a aligning moment to the vehicle, and the aligning moment can work in cooperation with the aligning characteristic of the vehicle suspension; in summary, the stability of the automobile in high-speed running is remarkably improved.

In this embodiment, a gap between two adjacent rectifying members 5 is an airflow channel, and a flow guide member 6 is disposed downstream of each airflow channel. After the air current passes through the rectifying part 5, the flow guiding part 6 can further rectify the air current, and guide the air current flow so as to prevent turbulent flow and reduce the resistance of the vehicle in high-speed running. Preferably, the adjacent fairings 5 have the same pitch, and the airflow channels formed by the same pitch have the same width. Correspondingly, the spacing between adjacent flow guides 6 is the same.

In this embodiment, the flow guiding members 6 are all of a triangular wing surface structure. The triangular wing surface structure comprises a left side wall, a right side wall and a bottom wall, the left side wall and the right side wall are in mirror symmetry, the distance between the left side wall and the right side wall decreases progressively from top to bottom, so that the cross section of the flow guide piece 6 is in an isosceles trapezoid shape, and the bottom wall is parallel to the middle of the lower chassis protection plate 1. The structure has good rectification effect on airflow and low wind resistance coefficient.

In this embodiment, the middle of the chassis lower protective plate 1 is horizontally disposed, the rear portion of the chassis lower protective plate 1 extends upward from front to back, the plurality of fairings 5 are disposed in the middle of the chassis lower protective plate 1, and the flow guide members 6 are disposed at the rear portion of the chassis lower protective plate 1. The rear part of the chassis lower protective plate 1 extends upwards from front to back to form a circular arc-shaped plate-shaped structure.

In this embodiment, the middle of the chassis bottom guard plate 1 is horizontally disposed, the front of the chassis bottom guard plate 1 extends upward from the rear to the front, and the plurality of fairings 5 are disposed in the middle of the chassis bottom guard plate 1. When a vehicle runs at a high speed, the chassis lower protective plate 1 can rectify high-speed airflow entering the bottom of the vehicle, various turbulences and turbulent flows caused by the airflow passing through a chassis complex structure are eliminated, the wind resistance coefficient when the vehicle runs at a high speed is reduced, meanwhile, the front part of the chassis lower protective plate 1 and the middle part of the chassis lower protective plate 1 jointly form a high-speed airflow diffusion structure, according to the Venturi effect, the airflow is accelerated when passing through a throat area of the diffusion structure and then gradually returns to the same speed, in the diffusion structure formed by the front part of the chassis lower protective plate 1 and the middle part of the chassis lower protective plate 1, the middle part of the chassis lower protective plate 1 belongs to the throat area, the airflow is accelerated when passing through the throat area, on the basis that the higher the air flow speed, the lower pressure is smaller, the lift force generated by the high-speed airflow of a rear suspension part is, the stability of the automobile in high-speed running can be improved.

In the embodiment, the front end of the chassis lower guard plate 1 is provided with an installation skirt 2, and the installation skirt 2 is provided with a plurality of front installation through holes 3; the rear end part of the chassis lower protective plate 1 is provided with a plurality of rear mounting through holes 4. The mounting skirt 2 is connected with the vehicle body through a front mounting through hole 3, and the rear end part of the chassis lower protective plate 1 is connected with the tail part of the vehicle body through a rear mounting through hole 4.

In the present embodiment, the length of the fairing front section 5a in the front-rear direction is smaller than the length of the fairing rear section 5b in the front-rear direction. The design ensures that the included angle of the front end of the front section of the rectifying section is larger than the included angle of the rear end of the rear section 5b of the rectifying piece, and the whole rectifying piece is of a streamline structure, so that the wind resistance coefficient of the rectifying piece 5 can be reduced when a vehicle runs at high speed.

In this embodiment, the corners of the front side, the left side, and the right side of the fairing 5 are rounded corners, and the three corners are designed as rounded corners, so that the wind resistance coefficient of the fairing 5 during high-speed driving of a vehicle can be further reduced. The corners of the left side of fairing 5 and the right side of fairing 5 are both located at the junction of the fairing segment front section and fairing segment rear section 5 b.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a backplate structure under vehicle chassis which characterized in that: backplate (1) under the chassis, the downside of backplate (1) is provided with a plurality of fairing (5) from a left side to the right interval under the chassis, and is a plurality of fairing (5) all is including connecting into holistic fairing anterior segment (5 a) and fairing back end (5 b), fairing anterior segment (5 a) width from the front to the back increases progressively, fairing back end (5 b) width from the front to the back decreases progressively.

2. The underbody shield structure for an automobile chassis according to claim 1, wherein: the gap between every two adjacent rectifying parts (5) is an airflow channel, and a flow guide part (6) is arranged at the downstream of each airflow channel.

3. The underbody shield structure for an automobile chassis according to claim 2, wherein: the flow guide pieces (6) are all of triangular wing surface structures.

4. The underbody shield structure for an automobile chassis according to claim 3, wherein: the middle of the lower chassis protection plate (1) is horizontally arranged, the rear portion of the lower chassis protection plate (1) extends upwards from the front to the rear, the plurality of rectifying pieces (5) are arranged in the middle of the lower chassis protection plate (1), and the flow guide pieces (6) are arranged at the rear portion of the lower chassis protection plate (1).

5. The underbody shield structure for an automobile chassis according to claim 1 or 4, wherein: the middle of the chassis lower protective plate (1) is horizontally arranged, the front part of the chassis lower protective plate (1) extends upwards from back to front, and the plurality of rectifying pieces (5) are arranged in the middle of the chassis lower protective plate (1).

6. The underbody shield structure for an automobile chassis according to claim 5, wherein: the front end of the chassis lower guard plate (1) is provided with an installation skirt edge (2), and a plurality of front installation through holes (3) are formed in the installation skirt edge (2); the rear end part of the chassis lower protective plate (1) is provided with a plurality of rear mounting through holes (4).

7. The underbody shield structure for an automobile chassis according to claim 1, wherein: the length of the fairing front section (5 a) in the front-rear direction is smaller than the length of the fairing rear section (5 b) in the front-rear direction.

8. The underbody shield structure for an automobile chassis according to claim 7, wherein: the corners of the front side, the left side and the right side of the fairing (5) are all round corners.