Rear protection device and vehicle

Abstract

The present application relates to a rear protection device and a vehicle. The rear protection device is used to be connected to the frame of the vehicle, and the rear protection device includes a protection beam, which includes a truss structure and a plate assembly. The truss structure is made of carbon fiber composite materials, and the plate assembly is at least covered on the outer peripheral side of a portion of the truss structure, and the plate assembly is made of metal material. The above-mentioned rear protection device, by providing a plate assembly made of metal material, so that the protection beam has a certain structural rigidity and strength, thereby preventing the rear-end car from entering the bottom of the commercial vehicle when the vehicles collide. By providing a truss structure made of carbon fiber composite materials, the various failure modes of carbon fiber composite materials in the collision failure process are combined with the structural deformation of the truss structure to dissipate the energy of the vehicle collision, thereby reducing the deformation of the rear-end car, so that there is still a large survival space in the rear-end car after the collision, thereby improving the safety of the occupants in the rear-end car.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle rear protection devices, and in particular to a rear protection device and a vehicle. Background Art

[0002] Vehicle collision and rear-end collision can easily lead to serious consequences. For example, when a car rear-ends a commercial vehicle, the front end of the car is lower than that of the commercial vehicle, which can easily cause the car to drill into the bottom of the commercial vehicle during the rear-end collision. In order to improve the safety of passengers in rear-end collision accidents, a rear protection device is provided in the related art. The protection device is provided with a reinforcement structure to improve the structural strength of the device, thereby preventing the rear-end car from drilling into the bottom of the commercial vehicle.

[0003] However, the rear protection device in the related art has the problem of large deformation when a rear-end collision occurs. Summary of the invention

[0004] Based on this, it is necessary to provide a rear protection device and a vehicle that reduce the deformation of the rear-end collision car in order to solve the problem of large deformation of the rear-end collision car in the related technology.

[0005] According to one aspect of the present application, a rear protection device is provided, which is used to be connected to a frame of a vehicle, and the rear protection device includes a protection beam, and the protection beam includes:

[0006] a truss structure made of carbon fiber composite material; and

[0007] The plate assembly is at least covered on a portion of the outer periphery of the truss structure, and the plate assembly is made of metal material.

[0008] The above rear protection device is provided with a plate assembly made of metal material so that the protection beam has a certain structural rigidity and strength to prevent the rear-end car from entering the bottom of the commercial vehicle when the vehicles collide. By providing a truss structure made of carbon fiber composite materials, the various failure modes of carbon fiber composite materials in the collision failure process are combined with the structural deformation of the truss structure to dissipate the energy of the vehicle collision, thereby reducing the deformation of the rear-end car, so that there is still a large survival space in the rear-end car after the collision, thereby improving the safety of the occupants in the rear-end car.

[0009] In one embodiment, the protection beam extends longitudinally along a first direction;

[0010] The truss structure comprises a plurality of support units arranged in rows and columns along the first direction and a second direction perpendicular to the first direction, each of the support units comprises at least one first support portion extending longitudinally along a third direction;

[0011] Wherein, the third direction is perpendicular to the first direction and the second direction respectively.

[0012] In one embodiment, each of the support units includes a plurality of the first support portions spaced apart from each other around a center line parallel to the third direction;

[0013] Each of the first supporting portions is recessed toward the corresponding center line.

[0014] In one embodiment, each of the first supporting portions is provided with a first connecting portion at two opposite ends along the third direction, and each of the first connecting portions extends longitudinally in a direction from the corresponding first supporting portion to the corresponding center line;

[0015] One end of the first connection portion is connected to the corresponding first supporting portion, and one end of the first connection portion away from the first supporting portion is connected to another first connection portion located at the same end of the same supporting unit along the third direction.

[0016] In one embodiment, each of the support units further comprises a second support portion extending along the third direction, and each end of the second support portion in the third direction is connected to at least one of the first connection portions located at the same end of the corresponding support unit in the third direction;

[0017] The second supporting portion includes a plurality of arc-shaped portions arranged along the third direction and connected end to end, and each of the arc-shaped portions is recessed in a direction perpendicular to the third direction and away from the corresponding center line.

[0018] In one embodiment, the truss structure further includes a connecting unit, each of which is connected between two adjacent first supporting portions of two adjacent supporting units;

[0019] The connection unit includes two third support portions that are arranged crosswise with each other, and two ends of each of the third support portions are respectively connected to two adjacent first support portions in the corresponding two support units.

[0020] In one embodiment, the plate assembly includes two first plates and at least one second plate, both of which extend longitudinally along a first direction;

[0021] The two first plates are respectively covered on two opposite sides of the truss structure in the second direction;

[0022] The second plate body is covered on one side of the truss structure in the third direction, and the opposite ends of the second plate body along the second direction are respectively connected to two second plate bodies;

[0023] Wherein, the third direction is perpendicular to the first direction and the second direction respectively.

[0024] In one embodiment, each of the first plates includes a first recessed portion and a second recessed portion which are staggered and connected to each other along the third direction;

[0025] The first recessed portion is recessed along the second direction toward a direction away from the truss structure, and the second recessed portion is recessed along the second direction toward a direction close to the truss structure.

[0026] In one embodiment, the protection beam further comprises two covering layers made of carbon fiber composite materials, and the two covering layers are respectively covered on two sides of the truss structure along the third direction;

[0027] The second plate is connected to a side of one of the covering layers away from the truss structure.

[0028] According to another aspect of the present application, a vehicle is provided, comprising the rear protection device as described in any one of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the assembly of the rear protection device and the frame in one embodiment of the present application;

[0030] Figure 2 for Figure 1 A schematic diagram of a partial structure of a protection beam in the illustrated embodiment;

[0031] Figure 3 for Figure 1 A schematic diagram of a partial structure of a truss structure in the illustrated embodiment;

[0032] Figure 4 for Figure 1 A side view of the truss structure in the illustrated embodiment;

[0033] Figure 5 for Figure 1 Schematic diagram of the assembly of the mounting bracket and the frame in the illustrated embodiment.

[0034] Description of reference numerals:

[0035] 100, rear protection device; 10, protection beam; 110, truss structure; 111, support unit; 1111, first support part; 1112, first connecting part; 1113, second support part; 1113a, arc part; 1114, second connecting part; 112, connecting unit; 1121, third support part; 120, plate assembly; 121, first plate; 1211, first recessed part; 1212, second recessed part; 122, second plate; 123, blocking part; 130, covering layer; 140, adhesive layer; 20, mounting bracket; 21, main bracket; 22, auxiliary bracket; 23, fixing plate; 30, second fastener; 40, third fastener; 200, frame; 201, cross beam; 202, longitudinal beam; A, first direction; B, second direction; C, third direction; a, center line. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] Figure 1 This is a schematic diagram of the assembly of the rear protection device and the frame in one embodiment of the present application; Figure 2 for Figure 1 A schematic diagram of the partial structure of the protection beam in the illustrated embodiment.

[0043] See also Figure 1-2 The rear protection device 100 provided in one embodiment of the present application is used to be connected to the vehicle frame 200, and the rear protection device 100 includes a protection beam 10. The protection beam 10 includes a truss structure 110 and a plate assembly 120, the truss structure 110 is made of carbon fiber composite material, and the plate assembly 120 is at least covered on the outer peripheral side of a portion of the truss structure 110, and the plate assembly 120 is made of metal material.

[0044] The above-mentioned rear protection device 100 is provided with a plate assembly 120 made of metal material so that the protection beam 10 has a certain structural rigidity and strength, thereby preventing the rear-end car from drilling into the bottom of the vehicle when the vehicle collides. The truss structure 110 made of carbon fiber composite material is used to utilize the complex failure mechanism of carbon fiber composite material during the collision failure process, as well as various failure forms including fiber breakage, matrix cracking, separation and shearing of matrix and fiber, interlayer cracking, etc., and combined with the structural deformation of the truss structure 110, the truss structure 110 can dissipate higher collision energy. In this way, the protection beam 10 absorbs a large amount of energy when the vehicle collides, effectively reduces the deformation of the rear-end car, and provides a larger survival space in the rear-end car, thereby improving the safety of the occupants in the rear-end car. In addition, the truss structure 110 is made of carbon fiber composite material, which also realizes the lightweight of the rear protection device 100.

[0045] It should be noted that the above rear protection device 100, because the plate assembly 120 made of metal is at least covered on the outer peripheral side of a part of the truss structure 110, ensures the rigidity and strength of the protection beam 10, and makes the deformation of the carbon fiber composite material more stable under the regular plastic deformation of the metal material. Therefore, the interaction effect generated when the metal material and the carbon fiber composite material are mixed and used is used to further improve the energy absorption characteristics of the overall structure of the protection beam 10.

[0046] In some embodiments, in combination Figure 1 and Figure 2 As shown, the plate assembly 120 includes a first direction (ie Figure 1 The two first plates 121 are respectively arranged on the truss structure 110 along the second direction (i.e. Figure 1 The second plate 122 is disposed on opposite sides of the truss structure 110 along the third direction (i.e. Figure 1 The first plate 121 and the second plate 122 are connected to the two second plate 122 at opposite ends along the second direction. The third direction is perpendicular to the first direction and the second direction. In this way, by providing the first plate 121 and the second plate 122 both extending along the first direction, the first plate 121 and the second plate 122 can be arranged at the rear of the vehicle along the extension direction of the crossbeam 201 of the frame 200, so as to increase the contact area between the protection beam 10 and the rear-end car when the vehicles collide, and play a more complete protective role for the rear of the vehicle. By providing two first plate 121 and at least one second plate 122, at least three sides of the protection beam 10 are protected by the plate assembly 120 made of metal, so that the protection beam 10 has sufficient strength to prevent the rear-end car from penetrating into the bottom of the vehicle.

[0047] In actual use, the first direction is the extension direction of the cross beam 201 of the vehicle, the third direction is the extension direction of the longitudinal beam 202 of the vehicle, and the second direction is the vertical direction.

[0048] Optionally, the first plate 121 and the second plate 122 can both be made of steel plates, and the performance grade and thickness of the steel plates can be set according to the requirements of rigidity and strength. It is understood that the material of the plate assembly 120 can be made of other metals according to the use requirements, which is not limited here.

[0049] In some embodiments, in combination Figure 1 and Figure 2 As shown, there is one second plate 122, and the second plate 122 is used to connect with the vehicle frame 200. In this way, the side of the truss structure 110 away from the second plate 122 in the third direction can contact the rear-end car, so that most of the impact caused by the collision of the vehicles can directly act on the truss structure 110, thereby effectively utilizing the energy absorption characteristics of the truss structure 110, so that most of the collision energy is dissipated by the truss structure 110, and the protection beam 10 has a better buffering and energy absorption effect.

[0050] Alternatively, if Figure 2 As shown, each first plate body 121 is provided with a blocking portion 123 extending longitudinally along the first direction on one side away from the second plate body 122 along the third direction, and the two blocking portions 123 extend toward the side close to each other along the second direction, and the blocking portion 123 and the second plate body 122 are arranged opposite to each other in the third direction, so that the truss structure 110 is fixed between the second plate body 122 and the blocking portion 123, thereby making the truss structure 110 more reliably fixed relative to the plate assembly 120.

[0051] In some embodiments, Figure 2 As shown, each first plate 121 includes a first recessed portion 1211 and a second recessed portion 1212 which are staggered and connected to each other along the third direction, the first recessed portion 1211 is recessed in the second direction away from the truss structure 110, and the second recessed portion 1212 is recessed in the second direction toward the truss structure 110. In this way, when the first plate 121 is impacted along the third direction, the first recessed portion 1211 and the second recessed portion 1212 can be compressed and deformed in the third direction, which is beneficial to the dissipation and conduction of the collision energy, so that the first plate 121 has a certain energy absorption effect, so as to further improve the overall energy absorption effect of the protection beam 10.

[0052] In some embodiments, Figure 2As shown, the protection beam 10 further includes two covering layers 130 made of carbon fiber composite materials, the two covering layers 130 are respectively covered on both sides of the truss structure 110 along the third direction, and the second plate body 122 is connected to a side of one of the covering layers 130 away from the truss structure 110. In this way, the carbon fiber covering layer 130 is provided to fix the truss structure 110, and together with the truss structure 110, a total energy absorption module made of carbon fiber composite materials is formed, and the total energy absorption module is conveniently fixedly connected to the plate body assembly 120.

[0053] It should be noted that the covering layer 130 may be made of carbon fiber composite panels with different performance levels, different fiber arrangement directions, different numbers of plies, and different thicknesses according to the stiffness and strength requirements.

[0054] Optionally, the protection beam 10 further includes a plurality of first fasteners (not shown in the figure) penetrating the second plate body 122 and the covering layer 130 connected thereto along the third direction, so as to fix the second plate body 122 relative to the covering layer 130 connected thereto.

[0055] In some embodiments, Figure 2 As shown, the covering layer 130 and the truss structure 110 are bonded and fixed by an adhesive layer 140. Optionally, the adhesive layer 140 may be made of oxidized resin glue.

[0056] Figure 3 for Figure 1 A schematic diagram of a partial structure of a truss structure in the illustrated embodiment; Figure 4 for Figure 1 Side view of the truss structure in the illustrated embodiment.

[0057] In some embodiments, Figures 2 to 4As shown, the protection beam 10 extends longitudinally along the first direction, and the truss structure 110 includes a plurality of support units 111 arranged in rows along the first direction and a second direction perpendicular to the first direction, and each support unit 111 includes at least one first support portion 1111 extending longitudinally along a third direction. The third direction is perpendicular to the first direction and the second direction, respectively. In this way, by setting the protection beam 10 to extend longitudinally along the first direction, the protection beam 10 can be set at the rear of the vehicle along the extension direction of the cross beam 201 of the frame 200, thereby playing a protective role for different parts of the rear of the vehicle. By setting the truss structure 110 to include a plurality of support units 111, and each support unit 111 includes at least one first support portion 1111 extending along the third direction, the first support portion 1111 can withstand pressure in the third direction, thereby providing the protection beam 10 with impact resistance in the third direction. By providing the truss structure 110 with a plurality of support units 111 arranged in rows and columns along the first direction and the second direction respectively, the support units 111 are arranged evenly, so that the truss structure 110 as a whole has good impact resistance.

[0058] It is understandable that, in actual use, the third direction is set to be parallel to the extension direction of the longitudinal beam 202 of the vehicle, that is, parallel to the impact direction when the rear-end car collides with the rear of the vehicle, thereby utilizing the higher impact strength of the first support portion 1111 in the third direction to increase the impact energy absorbed by the protection beam 10, that is, to improve the energy absorption characteristics of the protection beam 10.

[0059] In some embodiments, Figure 3 and Figure 4 As shown, each support unit 111 includes a plurality of first support portions 1111 spaced apart from each other around a center line a parallel to the third direction, and each first support portion 1111 is recessed toward the corresponding center line a. Thus, by setting each first support portion 1111 to be recessed toward the corresponding center line a, the first support portion 1111 is used to withstand the tensile force along the recessed direction of the first support portion 1111, thereby further improving the compression resistance of the first support portion 1111, and making the protection beam 10 have a better energy absorption effect. When a vehicle collides, the structural deformation of the first support portion 1111 is combined with the complex failure mechanism and failure form of the carbon fiber composite material during the failure process, so that the truss structure 110 dissipates a higher collision energy.

[0060] It should be noted that the center line a refers to the rotationally symmetric center line of all the first support portions 1111 included in the same support unit 111, that is, after each first support portion 1111 rotates around the corresponding center line a by a preset angle, it coincides with another first support portion 1111 of the same support unit 111.

[0061] Alternatively, if Figure 3 and Figure 4 As shown, each support unit 111 includes four first support portions 1111 , and the preset angle is 90 degrees. In the same support unit 111 , any first support portion 1111 is overlapped with another adjacent first support portion 1111 after rotating 90 degrees around the corresponding center line a.

[0062] Specifically, among the four first supporting parts 1111 included in the same supporting unit 111, two first supporting parts 1111 are arranged opposite to each other in the first direction, and the other two first supporting parts 1111 are arranged opposite to each other in the second direction, so that all the first supporting parts 1111 of the truss structure 110 are evenly distributed in the first direction and the second direction.

[0063] In some other embodiments, the number of the first supporting portions 1111 included in each supporting unit 111 and the preset angles may also adopt other settings.

[0064] In order to connect different first supporting parts 1111 to each other, in some embodiments, Figure 3 and Figure 4 As shown, each first support portion 1111 is provided with a first connection portion 1112 at two opposite ends along the third direction, and each first connection portion 1112 extends longitudinally in the direction of the corresponding first support portion 1111 pointing to the corresponding center line a. One end of the first connection portion 1112 is connected to the corresponding first support portion 1111, and one end of the first connection portion 1112 away from the first support portion 1111 is connected to other first connection portions 1112 located at the same end of the same support unit 111 along the third direction. In this way, by providing the first connection portion 1112, all the first support portions 1111 included in the same support unit 111 are connected to each other by means of the first connection portion 1112, so as to facilitate the transmission of collision energy and increase the impact resistance of the support unit 111 in the direction perpendicular to the third direction.

[0065] Furthermore, if Figure 4 As shown, each first support portion 1111 is further provided with at least one second connection portion 1114, and along the third direction, the second connection portion 1114 is located between the corresponding two first connection portions 1112, and one end of the second connection portion 1114 is connected to the first support portion 1111, and the other end of the second connection portion 1114 is connected to the other second connection portion 1114 of the same support unit 111. In this way, the structural strength of the support unit 111 is further improved.

[0066] In some embodiments, Figure 3 and Figure 4As shown, each support unit 111 further includes a second support portion 1113 extending along the third direction, and each end of the second support portion 1113 in the third direction is connected to at least one first connection portion 1112 located at the same end of the support unit 111 in the third direction. The second support portion 1113 includes a plurality of arc portions 1113a arranged along the third direction and connected end to end, and each arc portion 1113a is concave in a direction perpendicular to the third direction and away from the corresponding center line a. In this way, each arc portion 1113a can withstand the pulling force in the concave direction thereof.

[0067] It should be noted that among all the arc portions 1113a included in each second support portion 1113, at least one arc portion 1113a has a different concave direction from the other arc portions 1113a, so that the second support portion 1113 can withstand tensile forces in different directions, thereby enabling the second support portion 1113 to have better crushing characteristics in different directions.

[0068] Alternatively, if Figure 3 and Figure 4 As shown, the second supporting portion 1113 includes a plurality of arc-shaped portions 1113a whose recessed directions are opposite to each other.

[0069] Specifically, each arc-shaped portion 1113a is recessed along the second direction in a direction away from the corresponding center line a, and the same second support portion 1113 includes arc-shaped portions 1113a with recessed directions opposite to each other, so that the second support portion 1113 can withstand the tensile forces on opposite sides along the second direction, so that the protective beam 10 has good energy absorption characteristics under compression along the second direction.

[0070] In one embodiment, Figure 3 and Figure 4 As shown, the second support portion 1113 includes four arc portions 1113a, wherein the concave directions of two arc portions 1113a are opposite to the concave directions of the other two arc portions 1113a. In other embodiments, the number of arc portions 1113a included in the second support portion 1113 may also be other settings, which are not limited here.

[0071] Optionally, the second supporting portion 1113 is disposed along the corresponding center line a, so that both ends of the second supporting portion 1113 can be respectively connected to all the first connecting portions 1112 included in the supporting unit 111 to which it belongs.

[0072] In order to connect the plurality of support units 111 to each other, in some embodiments, Figure 3 and Figure 4As shown, opposite ends of the first support portion 1111 in the third direction are respectively connected to opposite ends of adjacent first support portions 1111 in adjacent support units 111 , so as to facilitate the transfer of collision energy within the truss structure 110 .

[0073] In some embodiments, Figure 3 and Figure 4 As shown, the truss structure 110 further includes a connection unit 112, each connection unit 112 is connected between two adjacent first support portions 1111 in two adjacent support units 111, and the connection unit 112 includes two third support portions 1121 arranged crosswise with each other, and both ends of each third support portion 1121 are respectively connected to two adjacent first support portions 1111 in the corresponding two support units 111. In this way, by providing the connection unit 112, the collision energy is transferred between the adjacent support units 111 by means of the connection unit 112. By providing the connection unit 112 including two third support portions 1121 arranged crosswise with each other, the third support portion 1121 can withstand the pressure along the third direction, and the impact resistance of the truss structure 110 in the third direction is further improved.

[0074] Therefore, the truss structure 110 is provided with a support unit 111 including a first support portion 1111 and a second support portion 1113, and a connection unit 112 including a third support portion 1121, so that the truss structure 110 has good energy absorption characteristics in the first direction, the second direction and the third direction. When the vehicles collide, the truss structure 110 combines the structural deformation and the complex failure mechanism and failure form of the carbon fiber composite material, such as fiber breakage, matrix cracking, matrix fiber separation and shearing, and interlayer cracking, so that the truss structure 110 dissipates a high collision energy, plays a good role in buffering and absorbing energy, effectively reduces the deformation of the rear-end collision car, and ensures the survival space of the occupants in the rear-end collision car.

[0075] Optionally, the truss structure 110 may be manufactured by using a hot melt deposition 3D printing technology and using a mixed short-cut carbon fiber polycarbonate composite material.

[0076] Figure 5 for Figure 1 Schematic diagram of the assembly of the mounting bracket and the frame in the illustrated embodiment.

[0077] In order to connect the protection beam 10 to the frame 200, in some embodiments, Figure 1 and Figure 5 As shown, the rear protection device 100 further includes two mounting brackets 20 which are spaced apart from each other and arranged opposite to each other along the longitudinal extension direction of the protection beam 10 , and the protection beam 10 is connected to the vehicle frame 200 by means of the mounting brackets 20 .

[0078] Specifically, combined Figure 2and Figure 5 As shown, the protection beam 10 is connected to the mounting bracket 20 via the second plate 122. In one embodiment, the rear protection device 100 includes a plurality of second fasteners 30 extending through the second plate 122 and the mounting bracket 20 along a third direction to fix the protection beam 10 relative to the mounting bracket 20.

[0079] In actual use, Figure 2 As shown, two mounting brackets 20 can be respectively connected to two longitudinal beams 202 of the vehicle. For example, the mounting bracket 20 can be installed on one side of the corresponding longitudinal beam 202 away from the other longitudinal beam 202 along the first direction.

[0080] In some embodiments, Figure 5 The rear protection device 100 further includes a third fastener 40 penetrating through the mounting bracket 20 and the corresponding longitudinal beam 202 along the first direction.

[0081] In some embodiments, Figure 5 As shown, each mounting bracket 20 includes a main bracket 21 and a sub-bracket 22. The main bracket 21 is arranged along the second direction, and the opposite ends of the main bracket 21 in the second direction are respectively used to connect with the frame 200 and the corresponding sub-bracket 22, and the sub-bracket 22 is connected to the protection beam 10.

[0082] Optionally, combined Figure 1-2 and Figure 5 As shown, each mounting bracket 20 also includes a fixing plate 23 disposed between the auxiliary bracket 22 and the protective beam 10, so that the auxiliary bracket 22 is connected to the second plate body 122 by means of the fixing plate 23, and the plane where the fixing plate 23 is located is perpendicular to the third direction.

[0083] According to another aspect of the present application, a vehicle is provided, comprising the rear protection device 100 as described in any one of the above embodiments.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A rear protection device, used to be connected to the frame of a vehicle, characterized in that: The rear protection device comprises a protection beam, and the protection beam comprises: a truss structure made of carbon fiber composite material; and A plate assembly is at least covered on a portion of the outer periphery of the truss structure, and the plate assembly is made of a metal material; the protection beam extends longitudinally along a first direction; The truss structure comprises a plurality of support units arranged in rows and columns along the first direction and a second direction perpendicular to the first direction, and each of the support units comprises four first support portions extending longitudinally along a third direction; Wherein, the third direction is perpendicular to the first direction and the second direction respectively; each of the support units comprises four first support portions spaced apart from each other around a center line parallel to the third direction; The center line is the rotationally symmetrical center line of all the first supporting parts included in the same supporting unit. In the same supporting unit, after any one of the first supporting parts rotates 90 degrees around the corresponding center line, it overlaps with another adjacent first supporting part, and each of the first supporting parts is recessed toward the corresponding center line; Each of the first supporting portions is provided with a first connecting portion at two opposite ends along the third direction, and each of the first connecting portions extends longitudinally in a direction from the corresponding first supporting portion to the corresponding center line; One end of the first connection portion is connected to the corresponding first support portion, and one end of the first connection portion away from the first support portion is connected to other first connection portions located at the same end of the same support unit along the third direction; each of the support units further comprises a second support portion extending along the third direction, and each end of the second support portion in the third direction is connected to at least one first connection portion located at the same end of the support unit along the third direction; The second supporting portion comprises a plurality of arc-shaped portions arranged along the third direction and connected end to end, each of the arc-shaped portions being recessed in a direction perpendicular to the third direction and away from the corresponding center line; among all the arc-shaped portions included in each second supporting portion, at least one of the arc-shaped portions has a recessed direction different from that of the other arc-shaped portions; The truss structure further includes a connecting unit, each of which is connected between two adjacent first supporting portions of two adjacent supporting units; The connection unit includes two third support portions that are arranged crosswise with each other, and two ends of each of the third support portions are respectively connected to two adjacent first support portions in the corresponding two support units.

2. The rear protection device according to claim 1, characterized in that: The plate assembly includes two first plates and at least one second plate, both extending longitudinally along a first direction; The two first plates are respectively covered on two opposite sides of the truss structure in the second direction; The second plate body is covered on one side of the truss structure in the third direction, and the opposite ends of the second plate body along the second direction are respectively connected to two second plate bodies; Wherein, the third direction is perpendicular to the first direction and the second direction respectively.

3. The rear protection device according to claim 2, characterized in that: Each of the first plates comprises a first recessed portion and a second recessed portion which are staggered and connected to each other along the third direction; The first recessed portion is recessed along the second direction toward a direction away from the truss structure, and the second recessed portion is recessed along the second direction toward a direction close to the truss structure.

4. The rear protection device according to claim 2, characterized in that: The protection beam further comprises two covering layers made of carbon fiber composite materials, and the two covering layers are respectively covered on two sides of the truss structure along the third direction; The second plate is connected to a side of one of the covering layers away from the truss structure.

5. A vehicle, characterized in that: Comprising the rear protection device according to any one of claims 1 to 4.

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