Guide plate and automobile

Abstract

The utility model relates to the technical field of passenger car design and manufacture, and discloses a guide plate and an automobile, the guide plate comprises a curved surface body, a first mounting part and a second mounting part, the first mounting part and the second mounting part are respectively connected with the curved surface body, the first mounting part is provided with a first connecting hole, and the second mounting part is provided with a second connecting hole; the curved surface body comprises a first curved surface part and a second curved surface part and a third curved surface part which are connected with the first curved surface part, the first mounting part is connected with the first curved surface part, and the second curved surface part is connected with the second mounting part; and a fourth curved surface part is arranged between the first mounting part and the second mounting part and is connected with the third curved surface part. The problems that when an existing automobile uses a flow guide plate to reduce the wind resistance coefficient of the whole automobile, the installation operation of the flow guide plate is complex, and universality is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of passenger car design and manufacturing, in particular to a deflector and a car. Background Art

[0002] In recent years, energy conservation and emission reduction in the automobile industry has been one of the key points of the national energy strategy. Among them, reducing the drag coefficient of the whole vehicle and reducing the resistance of the car's driving is an important measure to achieve automobile energy conservation and emission reduction. Wind resistance refers to the air resistance that the vehicle encounters during driving. The air resistance involved in general vehicles includes the following three forms: one is the resistance caused by the airflow hitting the front of the vehicle, which is almost all caused by the airflow impact; the second is friction resistance, which is caused by air passing through the car body; the third is appearance resistance, especially when the vehicle is driving at high speed, appearance resistance is its main source of air resistance; among them, the resistance caused by the appearance mainly comes from the vacuum area at the rear and bottom of the car. The larger the vacuum area, the greater the appearance resistance the car encounters.

[0003] Based on this, the main ways to reduce the vehicle's drag coefficient include designing a streamlined body shape, reducing turbulence around the body, increasing the smoothness of the body side and reducing the vortex at the rear of the vehicle, etc. Most of these methods need to be completed in the early stages of vehicle design and development. By adding aerodynamic accessories to the vehicle and adding deflectors, the aerodynamic performance of the vehicle can be optimized at the vehicle stage, thereby achieving the purpose of reducing the vehicle's driving resistance. The impact of aerodynamic drag reduction on different models of vehicles is different. For example, if the drag coefficient (Cd) of a fuel vehicle is reduced by 0.01, the corresponding comprehensive fuel consumption can be reduced by about 0.1L / 100km. If the extended-range vehicle reduces the same drag coefficient, its pure electric range can be increased by 6 to 10km, and the pure electric vehicle can increase the range by about 10 to 15km. This further illustrates the important role of aerodynamic drag reduction in vehicle energy consumption and range.

[0004] In the existing research on reducing the drag coefficient of the whole vehicle, the focus is mostly on the whole vehicle styling design, and few consider installing deflectors on the sheet metal and subframe at the rear lower part of the chassis to reduce the aerodynamic drag caused by the impact of high-speed airflow on the rear lower chassis. In addition, the market has great limitations on the design of deflectors installed on the rear lower chassis. The installation operation of the deflectors is relatively complicated, the deflector area is large, and the versatility is low. Utility Model Content

[0005] The utility model aims to provide a deflector and a car, so as to solve the problems that the deflector installation operation is complicated and the versatility is low when the deflector is used in the existing car to reduce the wind resistance coefficient of the whole car.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a deflector and a car, comprising a curved body and a first mounting part and a second mounting part respectively connected to the curved body, the first mounting part is provided with a first connecting hole, and the second mounting part is provided with a second connecting hole; the curved body comprises a first curved portion part and a second curved portion part and a third curved portion part respectively connected to the first curved portion part, the first mounting part is connected to the first curved portion part, and the second curved portion part is connected to the second mounting part; a fourth curved portion part is provided between the first mounting part and the second mounting part, and the fourth curved portion part is connected to the third curved portion part.

[0007] The beneficial effects of this solution are: 1. The surface of the curved body is used to interfere with the airflow entering the lower rear of the car, reducing the impact of the airflow on the rear chassis of the car body, thereby reducing the aerodynamic resistance of the original lower rear body of the car, achieving the effect of reducing the aerodynamic drag of the car. At the same time, due to the simple overall structure of the deflector, the bolts on the first mounting part and the second mounting part can be used to achieve connection with the chassis of most models of cars, thereby solving the problems of complex installation and operation of the existing deflector and low versatility.

[0008] 2. The detachable connection not only makes installation easy, but also enables the deflector to be replaced after long-term use, ensuring the effect of reducing air resistance after airflow disturbance.

[0009] 3. The curved body is formed by combining multiple curved surface parts. By constraining the arc radius range of each curved surface part, the shielding area of ​​the deflector on the lower rear of the vehicle and the inside of the vehicle body can be better controlled according to the height difference between the installation position of the deflector and the chassis, and the optimal deflector profile can be matched, thereby reducing the impact of airflow on the interior of the vehicle body and forming a positive pressure area, thereby achieving the purpose of reducing the wind resistance coefficient of the whole vehicle.

[0010] Preferably, the first curved surface portion has an arc radius of 150 to 250 mm, the second curved surface portion has an arc radius of 120 to 180 mm, the third curved surface portion has an arc radius of 130 to 170 mm, and the fourth curved surface portion has an arc radius of 400 to 500 mm.

[0011] Preferably, the overall height of the guide plate is 150-200 mm, the overall width of the guide plate is 230-280 mm, and the overall length of the guide plate is 160-180 mm.

[0012] Preferably, the thickness of the curved body, the first mounting portion and the second mounting portion are all 2-3.5 mm.

[0013] Preferably, the first mounting portion and the second mounting portion are both planar bodies.

[0014] Preferably, the first curved surface portion and the second curved surface portion are connected by a vertical fillet, and the radius of the fillet is 3 to 6 mm; the first curved surface portion and the third curved surface portion, and the third curved surface portion and the fourth curved surface portion are connected by a tangent connection.

[0015] Preferably, the guide plate is made of rubber or plastic.

[0016] Preferably, an automobile comprises the above-mentioned deflector, and the deflector is mounted on the rear subframe of the automobile body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the guide plate in the main viewing direction in the embodiment of the utility model;

[0018] Figure 2 A three-dimensional diagram of the guide plate in the embodiment of the utility model when viewed obliquely upward from the lower right side;

[0019] Figure 3 It is a three-dimensional diagram of the guide plate in the right view direction in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] Reference numerals in the drawings of the specification include: a first curved surface portion 1 , a second curved surface portion 2 , a third curved surface portion 3 , a fourth curved surface portion 4 , a first mounting portion 5 , a first connecting hole 51 , a second mounting portion 6 , and a second connecting hole 61 .

[0022] Example

[0023] The embodiment is basically as shown in the attached Figure 1-3 As shown, Figure 1 The deflector shown in the figure includes a curved body and a first mounting portion 5 and a second mounting portion 6 respectively connected to the curved body. The first mounting portion 5 and the second mounting portion 6 are used to detachably mount the deflector on the rear lower chassis of the automobile. The curved body makes the deflector as a whole present an irregular and asymmetrical three-dimensional structure to ensure that only the first mounting portion 5 and the second mounting portion 6 are in contact with the chassis after the deflector is installed, thereby achieving the installation of the deflector without interfering with the original vehicle body components. After installation, the surface of the curved body interferes with the airflow entering the rear lower part of the automobile, reducing the impact of the airflow on the rear chassis of the vehicle body, thereby reducing the aerodynamic resistance of the original rear lower body of the automobile, and achieving the effect of reducing the aerodynamic drag of the automobile.

[0024] like Figure 1As shown, the first mounting portion 5 is provided with a first connection hole 51, and the second mounting portion 6 is provided with a second connection hole 61. Bolts are threadedly connected in the first connection hole 51 and the second connection hole 61, and the deflector is detachably mounted on the vehicle body through the bolts. In this embodiment, the first mounting portion 5 is fixed to the sheet metal of the vehicle body chassis by bolts, and the second mounting portion 6 is fixed to the rear subframe of the vehicle by bolts. In traditional fuel-powered vehicles, extended-range vehicles, and new energy passenger vehicles including vehicles with no cover on the rear lower chassis of the vehicle, the sheet metal and the rear subframe are mostly vehicles with connecting rod structures, and the deflector can be bolted and installed, thereby greatly improving the versatility of the deflector; and the bolt connection operation is simple, and can be directly installed and used on most vehicles. By increasing the number of the first connection holes 51 and the second connection holes 61, the connection strength and installation stability of the deflector can be improved, and by changing the distribution positions of the first connection holes 51 and the second connection holes 61, the deflector can be adapted to the assembly between the sheet metal parts of the rear chassis and the rear subframe under more vehicle models. In addition, the first mounting portion 5 and the second mounting portion 6 are both planar bodies to increase the connection area between the deflector mounting surface and the sheet metal parts and the rear subframe, thereby further improving the stability and connection strength of the deflector connection.

[0025] The curved surface body includes a first curved surface portion 1, a second curved surface portion 2 connected to the right side of the first curved surface portion 1, and a third curved surface portion 3 connected to the bottom of the first curved surface portion 1. Figure 1 As shown, the first mounting portion 5 is connected to the lower portion of the first curved surface portion 1 and the third curved surface portion 3, and the second mounting portion 6 is connected to the lower portion of the second curved surface portion 2 and the right side of the third curved surface portion 3. Figure 2 and Figure 3 As shown, a fourth curved portion 4 is further provided between the first mounting portion 5 and the second mounting portion 6, and the top of the fourth curved portion 4 is connected to the bottom of the third curved portion 3; in this embodiment, the connection between each curved portion in each curved body and the first rotating portion and the second mounting portion 6 is integrally formed.

[0026] The material of the curved body, the first mounting portion 5 and the second mounting portion 6 (i.e., the material of the deflector) is rubber or plastic. Rubber or plastic is elastic, can maintain its shape under the action of airflow, is not easily damaged, and can rebound after deformation when subjected to irresistible impact. At the same time, after installation, no noise will be generated due to the vibration of the vehicle body. In addition, rubber or plastic is light in weight and cheap in price. Combined with the detachability of the deflector, it can be replaced at low cost after long-term use and damage occurs, thus meeting the needs of more users. In addition, the first curved portion 1 and the second curved portion 2, and the first mounting portion 5 and the first curved portion 1 are all vertically connected, and in the present embodiment, all vertical connections are vertically chamfered corner connections, i.e., chamfering is performed at the vertical connection between the two, and the radius of the chamfer is 3 to 6 mm; the first curved portion 1 and the third curved portion 3, the third curved portion 3 and the fourth curved portion 4, and the second curved portion 2 and the second mounting portion 6 are all tangently connected, and the tangent connections are all smoothed to make the transition between the two connections smoother, thereby ensuring the smoothness of the overall profile of the guide plate and achieving the purpose of reducing the impact of airflow.

[0027] The arc radius of the first curved portion 1 is 150-250 mm, the arc radius of the second curved portion 2 is 120-180 mm, the arc radius of the third curved portion 3 is 130-170 mm, and the arc radius of the fourth curved portion 4 is 400-500 mm. The range of the above arc radius is limited based on the rear structure under the conventional vehicle model to meet the overall layout requirements of the vehicle while ensuring the intensity of interference of the curved surface on the airflow; and the arc radius constraint range can better control the shielding area of ​​the deflector to the lower rear of the vehicle and the inside of the vehicle body according to the height difference between the first mounting portion 5 and the sheet metal, match the optimal deflector profile, thereby reducing the impact of airflow on the interior of the vehicle body and forming a positive pressure area, so as to achieve the purpose of reducing the wind resistance coefficient of the vehicle.

[0028] In addition, in this embodiment, the overall height of the guide plate in the Z direction is 150-200 mm, the overall width of the guide plate in the Y direction is 230-280 mm, and the overall length of the guide plate in the X direction is 160-180 mm, wherein the coordinate axis is Figure 1 As an example, the coordinate origin is established at Figure 1The lower right corner, and the origin and the bottom surface of the first mounting portion 5 are located in the same horizontal plane, the Z axis is the height of the deflector vertically upward, the Y axis is the width of the deflector from the left side of the first curved portion 1 to the right side of the second curved portion 2, and the X axis is the length of the deflector between the first mounting portion 4 and the second mounting portion 6. While meeting the assembly space conditions of various types of automobiles, the volume of the deflector is controlled, and then the change of the air resistance at the rear end of the original automobile chassis is achieved with the minimum interference to the original automobile chassis. The thickness of the curved body, the first mounting portion 5 and the second mounting portion 6 are all 2 to 3.5 mm, so as to reduce the overall weight of the deflector while ensuring the structural stability of the deflector itself, thereby reducing the impact of the deflector installation on the overall structure while reducing costs.

[0029] Finally, this embodiment also relates to a car, wherein the above-mentioned deflector is installed on the rear subframe at the rear lower part of the car body.

[0030] The deflector is designed in reasonable size and can play a good aerodynamic drag reduction effect on different passenger cars (especially extended-range models). The added deflector can well guide the airflow to the lower space behind the vehicle body, and the impact of the airflow in the Z-direction rear area of ​​the deflector on the vehicle body is significantly reduced. After experimental verification, it was found that after the deflector is installed, the drag coefficient (Cd) of the whole vehicle is generally reduced by about 0.003 to 0.006, the pure electric cruising range of the whole vehicle is increased by about 2 to 5km, and the fuel consumption of fuel vehicles is reduced by about 0.05L / 100km.

[0031] This deflector can be installed on various types of vehicles such as traditional fuel, extended-range, and new energy passenger vehicles without covering parts on the rear lower chassis of the whole vehicle. It is a static component installed on the body, made of lightweight and cheap materials, and does not require additional energy supply. When the car is driving at high speed, it reduces the impact of the chassis turbulent airflow on the rear lower chassis, reduces the aerodynamic resistance of the rear body, and achieves the purpose of reducing the driving resistance of the whole vehicle. The overall structure of the deflector is simple, easy to install, low cost, and has high economic benefits.

[0032] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical solution of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A guide plate, characterized in that: It includes a curved body and a first mounting portion and a second mounting portion respectively connected to the curved body, the first mounting portion is provided with a first connecting hole, and the second mounting portion is provided with a second connecting hole; the curved body includes a first curved surface portion and a second curved surface portion and a third curved surface portion respectively connected to the first curved surface portion, the first mounting portion is connected to the first curved surface portion, and the second curved surface portion is connected to the second mounting portion; a fourth curved surface portion is provided between the first mounting portion and the second mounting portion, and the fourth curved surface portion is connected to the third curved surface portion.

2. A guide plate according to claim 1, characterized in that: The first curved surface portion has an arc radius of 150 to 250 mm, the second curved surface portion has an arc radius of 120 to 180 mm, the third curved surface portion has an arc radius of 130 to 170 mm, and the fourth curved surface portion has an arc radius of 400 to 500 mm.

3. A guide plate according to claim 2, characterized in that: The overall height of the guide plate is 150-200 mm, the overall width of the guide plate is 230-280 mm, and the overall length of the guide plate is 160-180 mm.

4. A guide plate according to claim 3, characterized in that: The thickness of the curved body, the first mounting portion and the second mounting portion are all 2 to 3.5 mm.

5. A guide plate according to claim 4, characterized in that: The first mounting portion and the second mounting portion are both planar bodies.

6. A guide plate according to claim 5, characterized in that: The first curved surface portion and the second curved surface portion are connected by a vertical fillet, and the radius of the fillet is 3 to 6 mm; the first curved surface portion and the third curved surface portion, and the third curved surface portion and the fourth curved surface portion are all connected by a tangent connection.

7. A guide plate according to claim 6, characterized in that: The material of the deflector is rubber or plastic.

8. A car, characterized in that: The invention comprises the deflector according to any one of claims 1 to 7, and the deflector is installed on the rear subframe of the automobile body.

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