Bottom guard plate, rear suspension system and vehicle

Abstract

The invention provides a bottom protection plate, a rear suspension system and a vehicle, relates to the technical field of vehicle protection plates, and aims to solve the problem that an existing bottom protection plate is prone to cracking due to stress. The bottom protection plate comprises a bottom protection plate body, a concave part is formed on one side of the bottom protection plate body, a convex part is formed on the concave part on the other side of the bottom protection plate body, the concave part extends in the first direction and is used for absorbing energy generated by forced displacement of the bottom protection plate body in the second direction, and the first direction intersects with the second direction. The bottom protection plate can absorb stress generated by forced displacement.

Description

Technical Field

[0001] This application relates to the technical field of vehicle underbody shields, and more particularly to an underbody shield, a rear suspension system, and a vehicle. Background Art

[0002] With the improvement of people's living standards and the progress of science and technology, cars have gradually become the main means of transportation for people, and the types of cars have gradually become richer. Among them, the underbody shield is an integral part of the vehicle and can protect the vehicle chassis from being impacted by road obstacles.

[0003] Generally, the front side of the underbody shield can be connected to the vehicle body or the battery pack by bolts, and the rear side of the underbody shield can be connected to the subframe by bolts. However, during the driving of the vehicle, the subframe will displace during driving. At this time, since the front side of the underbody shield is fixedly connected to the vehicle body or the battery pack, a large stress will be generated on the rear side of the underbody shield due to the movement of the subframe, making the underbody shield prone to cracking problems due to the displacement of the subframe, creating a safety hazard. Summary of the Invention

[0004] The purpose of this application is to provide an underbody shield, a rear suspension system, and a vehicle, which are used to solve the problem that the existing underbody shield is prone to cracking due to stress.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, an embodiment of this application provides an underbody shield, including an underbody shield body. A recessed portion is formed on one side of the underbody shield body, and a protruding portion is formed on the other side of the underbody shield body corresponding to the recessed portion. Among them, the recessed portion extends along a first direction and is used to absorb the energy generated by the forced displacement of the underbody shield body along a second direction. The first direction intersects the second direction.

[0007] According to the above technical means, for the underbody shield provided by the embodiment of this application, since the underbody shield body is formed with a recessed portion, and a protruding portion is formed on the other side corresponding to the recessed portion. In this way, when the underbody shield body generates stress due to forced displacement along the second direction, the recessed portion can be deformed under the action of force to absorb the above-mentioned forced displacement, thereby reducing the overall stress of the underbody shield body and reducing the probability of cracking of the underbody shield body.

[0008] In a possible implementation manner, the number of recessed portions is multiple. The multiple recessed portions are arranged at intervals along the second direction.

[0009] According to the above technical means, the multiple recessed portions can jointly play an energy absorption effect, thereby further reducing the overall stress of the underbody shield body and achieving a better energy absorption effect.

[0010] In a possible implementation, along the first direction, the recess extends to both ends of the bottom guard plate body to form an opening.

[0011] According to the above technical means, since the recess penetrates the bottom guard plate body along the first direction. In this way, the length of the recess is relatively long, and it can absorb the stress generated by the forced displacement of the bottom guard plate body at various positions, and the absorption effect is better.

[0012] In a possible implementation, an opening is provided in the recess, and the opening extends along the second direction. The opening is used to absorb the energy generated by the forced displacement of the bottom guard plate body along the first direction.

[0013] According to the above technical means, since an opening is provided in the recess and the opening extends along the second direction. In this way, when the bottom guard plate body generates stress due to forced displacement along the first direction, the opening can play a role in energy dissipation, thereby reducing the stress of the bottom guard plate body and reducing the probability of cracking of the bottom guard plate body due to stress.

[0014] In a possible implementation, the number of recesses is multiple. The multiple recesses are arranged at intervals along the second direction. The opening extends through the multiple recesses along the second direction.

[0015] According to the above technical means, since the opening penetrates the multiple recesses. In this way, when designing the opening, only one opening needs to penetrate the multiple recesses, and the design is simple and convenient.

[0016] In a possible implementation, the bottom guard plate body includes a first bottom guard plate body, an energy absorption structure, and a second bottom guard plate body. Along the first direction, the energy absorption structure is located on one side of the first bottom guard plate body, arranged side by side with and connected to the first bottom guard plate body. Along the first direction, the second bottom guard plate body is located on the side of the energy absorption structure away from the first bottom guard plate body, arranged side by side with and connected to the energy absorption structure. Among them, the energy absorption structure is formed with a recess.

[0017] According to the above technical means, when manufacturing the bottom guard plate body, it can be manufactured separately, and the first bottom guard plate body, the energy absorption structure, and the second bottom guard plate body can be manufactured separately, and the manufacturing is simpler and more convenient.

[0018] In a possible implementation, the energy absorption structure is made of a heat-melt material.

[0019] According to the above technical means, the energy absorption structure has a better energy absorption effect and can better absorb stress.

[0020] In a possible implementation, along the third direction, the depth of the recess is greater than or equal to 2 mm and less than or equal to 10 mm.

[0021] According to the above technical means, the depth of the concave part is moderate, which can ensure the energy absorption effect while also ensuring the strength of the bottom guard plate body itself.

[0022] In a possible implementation manner, along the second direction, the width of the concave part is greater than or equal to 5 mm and less than or equal to 15 mm.

[0023] According to the above technical means, the width of the concave part is moderate, which can ensure the energy absorption effect while also ensuring the strength of the bottom guard plate body itself.

[0024] In a second aspect, an embodiment of the present application provides a rear suspension system, including any one of the bottom guard plates in the first aspect.

[0025] Since the rear suspension system provided by the embodiment of the present application includes any one of the bottom guard plates in the first aspect, it can solve the same technical problems as the above bottom guard plate and achieve the same technical effects, which will not be elaborated here.

[0026] In a possible implementation manner, the rear suspension system further includes a vehicle frame and a first fastener. The first fastener is connected to the vehicle frame and the bottom guard plate body. The vehicle frame and the bottom guard plate body are connected by the first fastener.

[0027] According to the above technical means, since the bottom guard plate body is designed with a concave part for energy absorption. In this way, the vehicle frame can be directly connected by the first fastener, and the connection is more convenient and firm.

[0028] In a third aspect, an embodiment of the present application provides a vehicle, including any one of the rear suspension systems in the second aspect.

[0029] Since the vehicle provided by the embodiment of the present application includes any one of the rear suspension systems in the second aspect, it can solve the same technical problems as the rear suspension system and achieve the same technical effects, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of a rear suspension system provided by an embodiment of the present application;

[0031] Figure 2 is a schematic structural diagram of a connection pad provided by an embodiment of the present application;

[0032] Figure 3 is a schematic structural diagram of a bottom guard plate provided by an embodiment of the present application;

[0033] Figure 4 is a schematic structural diagram of the bottom guard plate in a connected state provided by an embodiment of the present application;

[0034] Figure 5 is a forced analysis displacement nephogram of different bottom guard plates along the first direction;

[0035] Figure 6 Stress nephogram of forced analysis for different bottom guards along the first direction;

[0036] Figure 7 Displacement nephogram of forced analysis for different bottom guards along the second direction;

[0037] Figure 8 Stress nephogram of forced analysis for different bottom guards along the second direction.

[0038] Reference numerals:

[0039] 100 - Rear suspension system; 10 - Bottom guard; 101 - Depression; 102 - Opening; 11 - Bottom guard body; 111 - First bottom guard body; 112 - Energy absorption structure; 113 - Second bottom guard body; 20 - Vehicle frame; 30 - Battery pack; 40 - Connecting pad; 50 - First fastener; 60 - Second fastener. Detailed implementation manners

[0040] In order to enable those of ordinary skill in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above - mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0042] The embodiments of the present application provide a vehicle. Among them, the specific type of the vehicle is not specifically limited in the embodiments of the present application. For example, the vehicle provided in the embodiments of the present application can be an electric vehicle, a hybrid vehicle or a solar vehicle, etc. At the same time, the vehicle provided in the embodiments of the present application can also be vehicles of different forms. For example, the vehicle provided in the embodiments of the present application can be a sedan, a sport utility vehicle (SUV) or a multi - purpose vehicle (MPV).

[0043] The vehicle may include a vehicle frame. The vehicle frame can form the overall shape structure of the exterior of the vehicle and form a passenger accommodation space. The vehicle frame is formed with a door structure through which users can enter and exit.

[0044] In addition, to drive the vehicle, the vehicle may further include an electric drive system assembly. The electric drive system assembly may include an electric drive system. Among them, the electric drive system may include a drive motor and a reducer. The drive motor can provide power, and the reducer can be connected to the drive motor. The reducer can adjust the speed to enable the vehicle to run at different speeds. Among them, according to different drive modes of the electric drive system, the electric drive system can be divided into front-wheel drive, rear-wheel drive, four-wheel drive and other layout modes.

[0045] In addition, the vehicle may further include a transmission system, which can be connected to the electric drive system and transmit the power generated by the engine to the wheels.

[0046] To supply power to electrical components such as the drive motor, the vehicle provided in the embodiment of the present application further includes a battery system. Among them, the battery system may include a battery pack, and the battery pack can be used to provide electrical energy. The battery pack can be connected to the electric drive system of the vehicle and other electrical components. In this way, the electrical energy of the battery pack can be transmitted to each component of the vehicle for power supply.

[0047] In addition, the vehicle provided in the embodiment of the present application may further include a rear suspension system. As Figure 1 shown, the rear suspension system 100 may include a frame 20 and a bottom guard plate 10. The bottom guard plate 10 can be connected to the frame 20. In addition, the bottom guard plate 10 can also be connected to the battery pack 30. Exemplarily, as Figure 1 shown, the frame 20 and the battery pack 30 can be located on the same side of the bottom guard plate 10 and are connected to the bottom guard plate 10.

[0048] The bottom guard plate 10 includes a bottom guard plate body 11. A recess 101 is formed on one side of the bottom guard plate body 11, and a protrusion is formed on the other side of the recess 101. Among them, the recess 101 extends in a first direction and is used to absorb the energy of the forced displacement of the bottom guard plate body 11 in a second direction. The first direction intersects the second direction.

[0049] Based on this, for the bottom guard plate 10 provided in the embodiment of the present application, since the bottom guard plate body is formed with a recess 101, and the recess 101 is formed with a protrusion on the other side. In this way, when the bottom guard plate body 11 generates stress of forced displacement in the second direction, the recess 101 can be deformed under the action of force to absorb the above-mentioned forced displacement, so that the overall stress of the bottom guard plate body 11 is reduced, and the probability of cracking of the bottom guard plate body 11 is reduced.

[0050] Exemplarily, as Figure 1 shown, the frame 20 and the battery pack 30 can be located on the upper side of the bottom guard plate 10 and are spaced apart in the left-right direction as Figure 1 shown. Among them, the second direction can be the left-right direction as Figure 1 shown, and the first direction is perpendicular toFigure 1 the direction of the plane shown (i.e., Figure 1 the inner and outer directions). In this way, when the vehicle frame 20 undergoes displacement along the Figure 1 left - right direction shown during driving, since the bottom guard plate body 11 is designed with a recessed portion 101 extending in the first direction, the recessed portion 101 can absorb the displacement of the vehicle frame 20, thereby absorbing the forced displacement of the bottom guard plate body 11 caused by the vehicle frame 20, reducing the overall stress of the bottom guard plate body 11, and reducing the probability of cracking of the bottom guard plate body 11.

[0051] In addition, as Figure 1 and Figure 2 shown, the rear suspension system 100 may further include a connecting pad 40. The connecting pad 40 can connect the vehicle frame 20 and the bottom guard plate 10. Among them, the connecting pad 40 can have a certain deformability. In this way, after the connecting pad 40 is subjected to the forced displacement from the vehicle frame 20, the connecting pad 40 can be compressed along the Figure 2 front - rear direction and the left - right direction shown, so as to reduce the forced displacement transmitted from the connecting pad 40 to the bottom guard plate 10, and finally reduce the forced displacement of the bottom guard plate 10 and the stress concentration generated thereby.

[0052] In a possible implementation manner, as Figure 3 shown, the number of the recessed portions 101 is multiple. The multiple recessed portions 101 are arranged at intervals along the second direction. Based on this, the multiple recessed portions 101 can jointly play an energy - absorbing effect, thereby further reducing the overall stress of the bottom guard plate body 11 and having a better energy - absorbing effect.

[0053] The specific number of the recessed portions 101 can be designed according to requirements. Exemplarily, as Figure 3 shown, the number of the recessed portions 101 can be two. Of course, the number of the recessed portions 101 can also be other numbers, which can be specifically designed according to the actual situation, and are only illustrated here as an example.

[0054] Of course, in some other embodiments, the number of the recessed portions 101 can also be only one. At this time, in order to ensure a good energy - absorbing effect, the size of the recessed portion 101 along the second direction can be relatively large, which can be specifically designed according to the actual situation and will not be further limited here.

[0055] In a possible implementation manner, along the first direction, the recessed portion 101 extends to both ends of the bottom guard plate body 11 to form openings. Based on this, since both ends of the recessed portion 101 along the first direction form openings at both ends of the bottom guard plate body 11. In this way, the length of the recessed portion 101 is longer, and it can absorb the stress generated by the forced displacement of the bottom guard plate body 11 at various positions, and the absorption effect is better.

[0056] Of course, in some other embodiments, along the first direction, the recess 101 may not extend to both ends of the bottom guard body 11. At this time, in order to enable the recess 101 to better play an energy absorption role, along the first direction, the number of the recesses 101 may be multiple. Thus, multiple recesses 101 can respectively play an energy absorption role, so that the multiple recesses 101 at each position can absorb the stress generated by the forced displacement of the bottom guard body 11 at each position, and the absorption effect is better.

[0057] In some embodiments, as Figure 3 shown, an opening 102 is formed in the recess 101, and the opening 102 extends along the second direction. The opening 102 is used to absorb the energy generated by the forced displacement of the bottom guard body along the first direction.

[0058] Since the opening 102 is formed in the recess 101 and the opening 102 extends along the second direction. In this way, when the bottom guard body generates stress due to forced displacement along the first direction, the opening 102 can play a role in discharging energy, thereby reducing the stress of the bottom guard body 11 and reducing the probability of cracking of the bottom guard body 11 due to stress.

[0059] In some embodiments, the opening 102 may penetrate through the bottom guard body 11. At this time, the opening 102 can better play a role in discharging energy. Of course, in some other embodiments, the opening 102 may also be a recess on the bottom guard body 11. At this time, the opening 102 can also play a relatively good energy discharging effect.

[0060] It can be understood that the opening 102 may also be provided at other positions. For example, in some other embodiments, the opening 102 may also be located on one side of the recess 101 and is spaced apart from the recess 101.

[0061] In some embodiments, the number of the recesses 101 is multiple. The multiple recesses 101 are arranged at intervals along the second direction. The opening 102 penetrates through the multiple recesses 101 along the second direction. Since the opening 102 penetrates through the multiple recesses 101. In this way, when designing the opening 102, only one opening 102 is needed to penetrate through the multiple recesses 101, and the design is simple and convenient.

[0062] Of course, in some other embodiments, the number of the recesses 101 is multiple, and the opening 102 penetrates through one recess 101 along the second direction. At this time, a single opening 102 can only penetrate through one recess 101. The above openings 102 may be respectively formed in the multiple recesses 101.

[0063] In some embodiments, as Figure 3As shown, the bottom guard plate body 11 includes a first bottom guard plate body 111, an energy absorption structure 112, and a second bottom guard plate body 113. Along the first direction, the energy absorption structure 112 is located on one side of the first bottom guard plate body 111, arranged side by side with and connected to the first bottom guard plate body 111. Along the first direction, the second bottom guard plate body 113 is located on the side of the energy absorption structure 112 away from the first bottom guard plate body 111, arranged side by side with and connected to the energy absorption structure 112. Among them, the energy absorption structure 112 is formed with a recess 101.

[0064] Based on this, when manufacturing the bottom guard plate body 11, it can be manufactured separately, manufacturing the first bottom guard plate body 111, the energy absorption structure 112, and the second bottom guard plate body 113 respectively, which is more simple and convenient. At the same time, the first bottom guard plate body 111 and the second bottom guard plate body 113 can be respectively connected to the battery pack 30 and the vehicle frame 20. Since the above-mentioned recess 101 is provided on the energy absorption structure 112, the forced positions that may occur on the vehicle frame 20 and the battery pack 30 can be transmitted to the energy absorption structure 112 through the first bottom guard plate body 111 and the second bottom guard plate body 113, and the recess 101 on the energy absorption structure 112 is used for energy dissipation to better protect the bottom guard plate body 11.

[0065] Of course, the recess 101 can also be provided at other positions. For example, in some embodiments, the first bottom guard plate body 111 and the second bottom guard plate body 113 can also be provided with the recess 101. At this time, the first bottom guard plate body 111 and the second bottom guard plate body 113 can also use the recess 101 for energy dissipation.

[0066] Of course, the bottom guard plate body 11 can also be of other compositional structures. For example, in some other embodiments, the bottom guard plate body 11 can also be integrally formed. At this time, the manufacturing of the bottom guard plate body 11 is simpler.

[0067] In a possible implementation manner, the energy absorption structure 112 is made of a hot-melt material. Based on this, the energy absorption structure 112 has a better energy absorption effect and can better absorb stress. Exemplarily, the energy absorption structure 112 can be made of a polyurethane material. Of course, the first bottom guard plate body 111 and the second bottom guard plate body 113 can have the same material as the energy absorption structure 112 or different materials from the energy absorption structure 112, and can be specifically selected according to the actual situation.

[0068] Based on Figure 3In the solution shown, the first bottom guard plate body 111 and the second bottom guard plate body 113 can be connected to the energy absorption structure 112 by rivets. In this way, the connection between the first bottom guard plate body 111 and the second bottom guard plate body 113 is relatively firm. Of course, the first bottom guard plate body 111 and the second bottom guard plate body 113 can also be connected to the energy absorption structure 112 by other means, and specific selection can be made according to the actual situation.

[0069] In a possible implementation manner, along the third direction, the depth of the recess 101 is greater than or equal to 2 mm and less than or equal to 10 mm.

[0070] According to the above technical means, the depth of the recess 101 is appropriate, which can ensure the energy absorption effect while also ensuring the strength of the bottom guard plate body itself.

[0071] In a possible implementation manner, along the second direction, the width of the recess 101 is greater than or equal to 5 mm and less than or equal to 15 mm.

[0072] According to the above technical means, the width of the recess 101 is appropriate, which can ensure the energy absorption effect while also ensuring the strength of the bottom guard plate body itself.

[0073] Generally, when connecting the bottom guard plate body 11 to the vehicle frame 20 and the battery pack 30, in order to enable the bottom guard plate body 11 to avoid the stress generated by the forced displacement of the vehicle frame 20 as much as possible, so that the two can perform relative displacement within a certain extent. A bolt with a rubber sleeve is used to connect the bottom guard plate body 11 and the vehicle frame 20. In this way, when the vehicle frame 20 undergoes forced displacement, since the bolt is equipped with a rubber sleeve and the rubber sleeve has flexibility, relative displacement can occur between the bottom guard plate body 11 and the vehicle frame 20, thereby avoiding the problem of stress concentration on the bottom guard plate body 11.

[0074] In some embodiments, as Figure 4 shown, the rear suspension system 100 further includes a first fastener 50. The first fastener 50 is connected to the vehicle frame 20 ( Figure 1 ) and the bottom guard plate body 11 ( Figure 1 ). The vehicle frame 20 and the bottom guard plate body 11 are connected by the first fastener 50. Since the bottom guard plate body 11 is designed with a recess 101 for energy absorption. In this way, the vehicle frame 20 can be directly connected by the first fastener 50, and the connection is more convenient and firm.

[0075] In some embodiments, as Figure 4 shown, the rear suspension system 100 may further include a second fastener 60. The second fastener 60 is connected to the battery pack 30 and the bottom guard plate body 11. The battery pack 30 ( Figure 1 ) and the bottom guard plate body 11 ( Figure 1) are connected to each other by a second fastener 60. Since the bottom guard plate body 11 is designed with a recessed portion 101 ( Figure 1 ) for energy absorption. In this way, the battery pack 30 can be directly connected by the second fastener 60, and the connection is more convenient and firm.

[0076] Exemplarily, both the first fastener 50 and the second fastener 60 can be bolts. Since the connection can be made only by bolts without setting rubber sleeves, the cost can be saved.

[0077] Based on Figure 3 the shown scheme, as Figure 5 shown, when the bottom guard plate body 11 undergoes a forced displacement in the X direction, as Figure 5 shown in a of Figure 5 , a in Figure 5 is the forced analysis displacement nephogram without the recessed portion 101, and there is a relatively obvious displacement in the upper region of the bottom guard plate body 11. On the contrary, as Figure 5 shown in b of

[0078] Figure 6 shown, Figure 6 , a and b in Figure 6 are the stress analysis diagrams of the bottom guard plate body 11 without the recessed portion 101 and with the recessed portion 101 respectively. As Figure 6 shown in a of

[0079] Figure 7 shown, when the bottom guard plate body 11 undergoes a forced displacement in the X direction, there is obvious stress concentration in the upper region of the bottom guard plate body 11. On the contrary, as Figure 7 shown in b of Figure 7 , when the bottom guard plate body 11 is provided with the recessed portion 101, the recessed portion 101 can play a role in discharging energy, so that the problem of stress concentration existing in the upper region of the bottom guard plate body 11 is eliminated. Figure 7 Figure 7 shown in b of

[0080] Figure 8 shown, Figure 8 ​​​​In FIGS. a and b are respectively the stress analysis diagrams of the bottom guard plate body 11 without the opening 102 and with the opening 102 provided, as Figure 8 shown in FIG. a, when the bottom guard plate body 11 undergoes a forced displacement in the Y direction, there is obvious stress concentration at the connection position of the bottom guard plate body 11 (i.e., Figure 4 at the first fastener 50 and the second fastener 60 shown). On the contrary, as Figure 8 shown in FIG. b, when the bottom guard plate body 11 is provided with the opening 102, the opening 102 can play a role in energy dissipation, thereby weakening the problem of stress concentration at the connection position.

[0081] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A bottom guard plate, characterized in that, Comprising: A bottom guard plate body (11), on one side of the bottom guard plate body (11), a recessed portion (101) is formed; on the other side of the bottom guard plate body (11), a protruding portion is formed in the recessed portion (101). Wherein, the recessed portion (101) extends along a first direction for absorbing the energy of the forced displacement of the bottom guard plate body (11) along a second direction; the first direction intersects with the second direction.

2. The bottom guard plate according to claim 1, characterized in that, The number of the recessed portions (101) is multiple; the multiple recessed portions (101) are arranged at intervals along the second direction.

3. The bottom guard plate according to claim 1, characterized in that, Along the first direction, the recessed portion (101) extends to both ends of the bottom guard plate body (11) to form an opening (102).

4. The bottom guard plate according to claim 1, characterized in that, An opening (102) is formed in the recessed portion (101), and the opening (102) extends along the second direction; the opening (102) is used for absorbing the energy of the forced displacement of the bottom guard plate body (11) along the first direction.

5. The bottom guard plate according to claim 4, characterized in that, The number of the openings (102) is multiple; the multiple openings (102) are arranged at intervals along the first direction.

6. The bottom guard plate according to claim 4, characterized in that, The number of the recessed portions (101) is multiple; the multiple recessed portions (101) are arranged at intervals along the second direction; the opening (102) penetrates through the multiple recessed portions (101) along the second direction.

7. The bottom guard plate according to claim 1, characterized in that, The bottom guard plate body (11) includes: A first bottom guard plate body (111); An energy absorption structure (112), along the first direction, located on one side of the first bottom guard plate body (111), arranged side by side with and connected to the first bottom guard plate body (111); and, A second bottom guard plate body (113), along the first direction, located on the side of the energy absorption structure (112) away from the first bottom guard plate body (111), arranged side by side with and connected to the energy absorption structure (112); Wherein, the energy absorption structure (112) forms the recessed portion (101).

8. The bottom guard plate according to claim 7, characterized in that The energy absorption structure (112) is made of a hot-melt material.

9. The bottom guard plate according to claim 1, characterized in that, Along a third direction, the depth of the recessed portion (101) is greater than or equal to 2 mm and less than or equal to 10 mm; the third direction is perpendicular to both the first direction and the second direction; and / or, Along the second direction, the width of the recessed portion (101) is greater than or equal to 5 mm and less than or equal to 15 mm.

10. A rear suspension system, characterized in that, Including the bottom guard plate (10) according to any one of claims 1-9.

11. The rear suspension system according to claim 10, characterized in that, The rear suspension system (100) further includes: A vehicle frame (20); and, A first fastener (50), the first fastener (50) is connected to the vehicle frame (20) and the bottom guard plate body (11); the vehicle frame (20) and the bottom guard plate body (11) are connected by the first fastener (50).

12. A vehicle, characterized in that, Including the rear suspension system (100) according to claim 10 or 11.

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