Automobile rear bottom protection plate and automobile

Abstract

The utility model provides an automobile rear bottom guard plate and an automobile, which are characterized in that a guard plate body comprises a connecting piece and a protective piece, the connecting piece and the protective piece are sequentially arranged along a first direction, the connecting piece and the protective piece are fixedly connected, a diversion trench is arranged between the connecting piece and the protective piece, and the diversion trench is perpendicular to the bottom of an automobile body; the opening of the diversion trench is vertical to the direction from the headstock to the tailstock; wherein the guide groove is formed in the rear bottom protection plate and provided with a first guide face and a second guide face, and the first guide face and the second guide face are gradually and obliquely arranged away from the vehicle body in the first direction. The air flow at the bottom of the automobile is smoothly discharged from the flow guide groove, the first flow guide face and the second flow guide face have a better guiding effect on the air flow, the air flow is guided in the direction between the automobile tail and the ground, the air flow is prevented from rolling upwards to form vortexes, and wind resistance at the bottom of the automobile is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts manufacturing, and in particular to an automobile rear bottom guard plate and an automobile. Background Art

[0002] With the continuous advancement of technology, consumers have higher and higher requirements for vehicle performance, and wind resistance is one of the vehicle performances that most consumers are concerned about. As an important component of the bottom of the vehicle, the rear underbody guard has a significant impact on the vehicle's wind resistance and appearance.

[0003] In traditional automobile structural design, especially in the design of pure electric models, in order to ensure the aesthetics of the bottom of the vehicle, a rear bottom guard plate is set at the rear bottom of the vehicle chassis. The rear bottom guard plate covers the rear bottom of the vehicle chassis. The front and rear spans of the covering area are from the lower protective plate bracket at the rear of the vehicle chassis to the rear bumper. The front and rear spans of the covering are relatively large, achieving an aesthetic effect; however, in order to improve the passability of the vehicle, the departure angle is designed to be relatively large. Due to the attachment effect of airflow, when the vehicle is driving at high speed, the high-speed airflow flowing through the bottom of the vehicle passes through the front bottom guard plate, the lower surface of the battery pack, and the rear bottom guard plate, and is drawn into the rear of the vehicle, forming a vortex, thereby increasing the wind resistance of the vehicle and also increasing pollution at the rear of the vehicle body. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a rear underbody guard plate and a car, which are used to solve the problem in the prior art that the high-speed airflow flowing through the bottom of the car passes through the front underbody guard plate, the lower surface of the battery pack, and the rear underbody guard plate, and is drawn into the rear end of the car to form a vortex, thereby increasing the wind resistance of the entire vehicle and increasing pollution at the rear end of the vehicle.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a rear underbody guard plate for an automobile, comprising:

[0006] A guard plate body, the guard plate body comprising a connecting member and a protective member, the connecting member and the protective member being arranged in sequence along a first direction and fixedly connected to each other, a guide groove being provided between the connecting member and the protective member, the guide groove being perpendicular to the bottom of the vehicle body, and the opening of the guide groove being perpendicular to the direction from the front to the rear of the vehicle;

[0007] The guide groove has a first guide surface and a second guide surface, and the first guide surface and the second guide surface are both tilted along a first direction gradually away from the vehicle body, and the first guide surface and the second guide surface are two opposite surfaces.

[0008] Optionally, both sides of the connecting member along the first direction are provided with connecting side plates, and ends of the two connecting side plates away from the connecting member are fixedly connected to the protective member;

[0009] Wherein, the guide groove is formed between the connecting member and the protective member.

[0010] Optionally, the first guide surface extends toward the upper front of the vehicle body to form an extension surface, and a size of the extension surface in the extension direction ranges from 6 mm to 8 mm.

[0011] Optionally, the second guide surface extends toward the upper front of the vehicle body to form an exhaust surface.

[0012] Optionally, the inclination angle range of the first guide surface and the second guide surface of the guide groove is 40 degrees to 45 degrees.

[0013] Optionally, the connecting member is arranged parallel to the chassis of the automobile, and the protective member is arranged obliquely along the first direction gradually approaching the bottom of the automobile.

[0014] Optionally, the connecting member is provided with a groove away from the vehicle body.

[0015] Optionally, a first connecting portion is provided at one end of the connecting member away from the protective member, and a second connecting portion is provided at one end of the protective member away from the connecting member.

[0016] Optionally, one end of the two connecting side plates away from the connecting member is bent in a direction away from the vehicle body.

[0017] The present application also provides an automobile, comprising the above-mentioned rear bottom guard plate.

[0018] As described above, the beneficial effects brought about by the technical solution in the present invention include at least: setting a guide groove, an inclined first guide surface and a second guide surface on the rear bottom guard plate, so that the airflow at the bottom of the car can be discharged smoothly from the guide groove, and the first guide surface and the second guide surface have a better guiding effect on the airflow, guiding the airflow in the direction between the rear of the car and the ground, avoiding the airflow from rolling up to form vortices, and reducing the wind resistance at the bottom of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Shown is a schematic structural diagram of a rear underbody guard plate of an automobile according to an exemplary embodiment of the present invention;

[0020] Figure 2 A top view of a rear underbody guard plate for an automobile according to an exemplary embodiment of the present invention is shown;

[0021] Figure 3 A cross-sectional view of a rear underbody guard plate for an automobile according to an exemplary embodiment of the present invention is shown.

[0022] Reference numerals:

[0023] 1. Connecting piece; 2. Protective piece; 3. Guide groove; 4. First guide surface; 5. Second guide surface; 6. Connecting side panel. DETAILED DESCRIPTION

[0024] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0025] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed at will, and the component layout may also be more complex.

[0026] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present disclosure. However, it will be apparent to those skilled in the art that the embodiments of the present disclosure may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid making the embodiments of the present disclosure difficult to understand.

[0027] See Figure 1 、 Figure 2 and Figure 3 The utility model provides a rear bottom guard plate of an automobile, comprising: a guard plate body, the guard plate body comprising a connecting member 1 and a guard 2, the connecting member 1 and the guard 2 are arranged in sequence along a first direction (in one embodiment of the present application, the direction from the front to the rear of the vehicle is the first direction, and the width direction of the vehicle body is the left-right direction), and the connecting member 1 is fixedly connected to the guard 2, a guide groove 3 is provided between the connecting member 1 and the guard 2, the guide groove 3 is perpendicular to the bottom of the vehicle body, and the opening of the guide groove 3 is perpendicular to the direction from the front to the rear of the vehicle; wherein, the guide groove 3 has a first guide surface 4 and a second guide surface 5, the first guide surface 4 and the second guide surface 5 are both inclined gradually away from the vehicle body along the first direction, and the first guide surface 4 and the second guide surface 5 are two opposite surfaces.

[0028] In one embodiment of the present application, specifically, the guard plate body includes a connecting member 1 and a protective member 2, the connecting member 1 is used to connect to the bottom of the car, the protective member 2 is used to protect the rear bottom of the car, the connecting member 1 and the protective member 2 are integrally formed, and there is a guide groove 3 between the connecting member 1 and the protective member 2, the guide groove 3 is a vertically arranged groove, the guide groove 3 is facing the direction from the front of the car to the rear of the car, the airflow flows from the bottom of the car to the guide groove 3, the bottom surface (first guide surface 4) and the top surface (second guide surface 5) of the inner wall of the guide groove 3 are both inclined along the first direction toward the direction away from the bottom of the car, forming the first guide surface 4 and the second guide surface The flow surface 5 guides the airflow in the direction between the rear of the vehicle and the ground, preventing the airflow from rolling up to form vortices, allowing the airflow at the bottom of the vehicle body to be discharged smoothly from the guide groove 3 and the guide groove 3, thereby reducing the wind resistance at the bottom of the vehicle. Through the structure of the guide groove 3, the drag coefficient of the entire vehicle can be reduced by 6 counts (the usage in wind resistance is a non-standard measurement method used to quantify the degree of improvement of the drag coefficient due to design optimization, which refers to how many tiny units or percentages the drag coefficient (Cd) value is reduced compared to the original design or industry standard), which is equivalent to a weight reduction of 30 kg and an increase of 3.6 kilometers in pure electric range according to CLTC working conditions.

[0029] See Figure 3 Furthermore, the protective member 2 is arranged at an angle, the protective member 2 is arranged gradually close to the vehicle body along the first direction, and the inclination angle of the protective member 2 is 20°.

[0030] In one embodiment of the present application, the height distance between the lowest point of the protective member 2 and the connecting member 1 ranges from 47 mm to 50 mm.

[0031] In one embodiment of the present application, the protective member 2 and the connecting member 1 are integrally formed, the portion of the protective member 2 close to the front of the vehicle is sunken to form the connecting member 1, and a guide groove 3 is provided at the connection between the protective member 2 and the connecting member 1.

[0032] The connecting member 1 is provided with connecting side plates 6 on both sides along the first direction, and one end of the two connecting side plates 6 away from the connecting member 1 is fixedly connected to the protective member 2;

[0033] Wherein, the guide groove 3 is formed between the connecting member 1 and the protective member 2 .

[0034] In one embodiment of the present application, specifically, both sides of the connecting member 1 in the first direction are provided with connecting side panels 6 (the two connecting side panels 6 are respectively provided along the left and right directions of the connecting member 1), the connecting side panels 6 are a right-angled triangle structure, and the height of the connecting side panels 6 gradually increases along the first direction. In this embodiment, the connecting side panels 6 and the connecting member 1 are fixedly connected (or integrally formed), the highest point of the connecting side panels 6 is fixedly connected (or integrally formed) with the protective member 2, the gap between the protective member 2 and the connecting member 1 forms a guide groove 3, and the edge of the connecting side panel 6 forms the edge of the guide groove 3.

[0035] The first guide surface 4 extends toward the upper front of the vehicle body to form an extension surface, and the size of the extension surface in the extension direction ranges from 6 mm to 8 mm.

[0036] In one embodiment of the present application, specifically, the first guide surface 4 is provided with an extension surface, which extends along the inclined direction of the first guide surface 4, and the extension surface is located above the connector 1, which is more convenient for airflow discharge and reduces airflow roll-up.

[0037] The second guide surface 5 extends toward the upper front of the vehicle body to form an exhaust surface.

[0038] In one embodiment of the present application, specifically, the second guide surface 5 extends in a direction close to the vehicle body (ie, a direction away from the protective member 2 ) to form an exhaust surface, and the exhaust surface is located above the connecting member 1 .

[0039] See Figure 3 In one embodiment of the present application, specifically, the first guide surface 4 and the second guide surface 5 of the guide groove 3 have an inclination angle ranging from 40 degrees to 45 degrees.

[0040] In one embodiment of the present application, the first guide surface 4 and the second guide surface 5 are inclined at an angle of 45 degrees, which can better guide the airflow to the lower rear of the vehicle body.

[0041] In one embodiment of the present application, specifically, the connecting member 1 is arranged parallel to the chassis of the automobile, and the protective member 2 is arranged to be tilted gradually close to the bottom of the automobile along a first direction, and the protective member 2 is gradually tilted toward the direction close to the bottom of the automobile. The inclination angle of the protective member 2 is 20°, so that the high-speed airflow is separated here, which facilitates the airflow to flow out of the guide groove 3 and reduces wind resistance.

[0042] The connecting member 1 is provided with a groove away from the vehicle body.

[0043] In one embodiment of the present application, specifically, a first connecting portion is provided at one end of the connecting member 1 away from the protective member 2, and a second connecting portion is provided at one end of the protective member 2 away from the connecting member 1. The connecting member 1 is connected to the vehicle body through the first connecting portion, and the protective member 2 is connected to the vehicle body through the second connecting portion.

[0044] The two connecting side plates 6 are bent in a direction away from the vehicle body at one end away from the connecting member 1 .

[0045] In one embodiment of the present application, the distance between the guide groove 3 and the plane of the connecting member 1 is 6 mm-8 mm.

[0046] In one embodiment of the present application, the length of the guide groove 3 is 1012 mm and the width is 31 mm. The length direction of the guide groove 3 is the left and right direction of the car, and the width direction is the height direction of the car.

[0047] It should be noted that the rear bottom guard plate is not only used for electric vehicles or new energy vehicles, but the rear bottom guard plate structure is also used for other vehicle models. For example, trucks, buses and cars can all be equipped with rear bottom guard plates. Depending on the model, the size of the rear bottom guard plate and the guide groove 3 will change accordingly.

[0048] The present application also provides an automobile, comprising the rear bottom guard plate as described above.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A rear underbody guard plate for an automobile, characterized in that: include: A guard plate body, the guard plate body comprising a connecting member and a protective member, the connecting member and the protective member being arranged in sequence along a first direction and fixedly connected to each other, a guide groove being provided between the connecting member and the protective member, the guide groove being perpendicular to the bottom of the vehicle body, and the opening of the guide groove being perpendicular to the direction from the front to the rear of the vehicle; The guide groove has a first guide surface and a second guide surface, and the first guide surface and the second guide surface are both tilted along a first direction gradually away from the vehicle body, and the first guide surface and the second guide surface are two opposite surfaces.

2. The automobile rear underbody guard according to claim 1, characterized in that: The connecting member is provided with connecting side plates on both sides along the first direction, and one end of the two connecting side plates away from the connecting member is fixedly connected to the protective member; Wherein, the guide groove is formed between the connecting member and the protective member.

3. The automobile rear underbody guard according to claim 1, characterized in that: The first guide surface extends toward the upper front of the vehicle body to form an extension surface, and the size of the extension surface in the extension direction ranges from 6 mm to 8 mm.

4. The automobile rear underbody guard according to claim 1, characterized in that: The second guide surface extends toward the upper front of the vehicle body to form an exhaust surface.

5. An automobile rear underbody guard according to any one of claims 1 to 4, characterized in that: The inclination angle range of the first guide surface and the second guide surface of the guide groove is 40 degrees to 45 degrees.

6. An automobile rear underbody guard according to any one of claims 1 to 4, characterized in that: The connecting member is arranged parallel to the chassis of the automobile, and the protecting member is arranged obliquely along the first direction gradually approaching the bottom of the automobile.

7. The automobile rear underbody guard according to claim 6, characterized in that: The connecting piece is provided with a groove away from the vehicle body.

8. The automobile rear underbody guard according to any one of claims 1 to 4, characterized in that: A first connecting portion is provided at one end of the connecting member away from the protecting member, and a second connecting portion is provided at one end of the protecting member away from the connecting member.

9. The automobile rear underbody guard according to claim 2, characterized in that: The two connecting side plates are bent in a direction away from the vehicle body at one end away from the connecting member.

10. An automobile, characterized in that: Comprising a rear bottom guard plate as described in any one of claims 1-9.

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