Front lower protection device and vehicle

Abstract

The utility model relates to a front lower protection device and a vehicle, the front lower protection device is arranged on the front lower portion of a vehicle frame assembly, the front lower protection device comprises a cross beam assembly and a connecting piece, the connecting piece is used for being connected with the cross beam assembly and the vehicle frame assembly, the cross beam assembly comprises a non-metal cross beam and an end cover, and the cross section of the cross beam is shaped like a Chinese character'ri '; the end covers are arranged at the two ends of the beam and used for sealing the ends of the beam. According to the protection device, the nonmetal cross beam and the end cover are used in the cross beam assembly, the weight of the front lower protection device is greatly reduced, the cross section of the cross beam is shaped like the Chinese character'ri ', and the protection strength of the front lower protection device is improved. According to the protection device, the driving safety of the vehicle is improved, and meanwhile the development requirement for the light weight of the whole vehicle can be met.

Description

Technical Field

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

[0002] With the development of vehicle technology, vehicles have gradually become an indispensable means of transportation for people's production and life. With the increase in the number of cars, the incidence of vehicle traffic accidents has gradually increased, and the safety of both drivers and passengers and pedestrians has become more and more important. According to relevant standards, when designing the safety of vehicles, vehicles need to be equipped with front lower protection devices to reduce the damage to drivers and passengers in the event of a vehicle collision.

[0003] At present, the traditional front lower protection device has the problems of complex processing and excessive weight. It cannot meet the current development requirements for lightweighting of the entire vehicle. Therefore, there is an urgent need for a front lower protection device that is lightweight and has sufficient strength. Utility Model Content

[0004] Based on this, it is necessary to provide a front underbody protection device and a vehicle that are both lightweight and strong.

[0005] In a first aspect, the present application provides a front lower protection device, which is arranged at the front lower part of a frame assembly, and the front lower protection device includes a crossbeam assembly and a connecting member, and the connecting member is respectively connected to the crossbeam assembly and the frame assembly, wherein:

[0006] The crossbeam assembly comprises a non-metallic crossbeam and an end cover. The cross section of the crossbeam is in a Japanese shape. The end covers are arranged at both ends of the crossbeam to close the ends of the crossbeam.

[0007] In one embodiment, the end cover is connected to the crossbeam by rivets.

[0008] In one embodiment, the crossbeam assembly further includes a reinforcing plate connected to the crossbeam so that the crossbeam assembly is connected to the connecting member at the reinforcing plate, wherein: the length of the reinforcing plate in the first direction is related to the spacing between the two connecting members.

[0009] In one of the embodiments, the reinforcing plate is threadedly connected to the crossbeam.

[0010] In one of the embodiments, a first connecting plate is provided inside the crossbeam, a plurality of nuts are provided on the first connecting plate, and the reinforcing plate is threadedly connected to the crossbeam through bolts matching the nuts.

[0011] In one embodiment, the reinforcing plate is made of metal.

[0012] In one embodiment, the connecting member includes an upper wing surface, a first support member and a second support member, and the intersection of the first support member and the second support member is connected to the second connecting plate, wherein: the connecting member is connected to the frame assembly through the upper wing surface, and is connected to the crossbeam assembly through the second connecting plate.

[0013] In one embodiment, the upper wing surface is provided with a first mounting hole group, and the connecting member is specifically connected to the frame assembly through the first mounting hole group; the second connecting plate is provided with a second mounting hole group, and the connecting member is specifically connected to the crossbeam assembly through the second mounting hole group.

[0014] In one embodiment, the connecting member further comprises a reinforcing structure, which is arranged inside a triangle formed by the upper wing surface, the first support member and the second support member, and abuts against inner sides of the upper wing surface, the first support member and the second support member respectively.

[0015] In a second aspect, the present application provides a vehicle, which includes a frame assembly and a front lower protection device as proposed in the first aspect, wherein the front lower protection device is connected to a lower wing surface of a longitudinal beam of the frame assembly.

[0016] The above-mentioned front lower protective device and vehicle are provided with a front lower protective device at the front lower part of the frame assembly, and the front lower protective device includes a crossbeam assembly and a connecting member, and the connecting member is used to connect with the crossbeam assembly and the frame assembly respectively, and the crossbeam assembly includes a non-metallic crossbeam and end caps, and the cross section of the crossbeam is a Japanese character shape, and the end caps are provided at both ends of the crossbeam, and are used to close the ends of the crossbeam. The protective device of the utility model uses non-metallic crossbeams and end caps in the crossbeam assembly, which greatly reduces the weight of the front lower protective device, and the cross section of the crossbeam is a Japanese character shape, which improves the protective strength of the front lower protective device. The protective device of the utility model can not only improve the driving safety of the vehicle, but also meet the development requirements for lightweighting of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic diagram of a front lower protection device according to an embodiment;

[0019] Figure 2 is a schematic diagram of a crossbeam in a front lower protection device according to an embodiment;

[0020] Figure 3 is a schematic diagram of a crossbeam in a front lower protection device according to another embodiment;

[0021] Figure 4 A schematic diagram of a cross beam end cover in a front lower protection device according to an embodiment;

[0022] Figure 5 The figure is a schematic diagram of a connecting member in a front lower protection device according to an embodiment.

[0023] Description of reference numerals:

[0024] 100. Frame assembly;

[0025] 200, connecting member; 210, upper wing surface; 212, first mounting hole group; 220, first supporting member; 230, second supporting member; 240, second connecting plate; 242, second mounting hole group;

[0026] 300, crossbeam assembly; 310, crossbeam; 320, end cover; 330, reinforcement plate; 340, first connecting plate; 342, nut; 344, bolt. DETAILED DESCRIPTION

[0027] 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.

[0028] In the description of the present application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 the specific circumstances.

[0031] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0032] It should be noted that if 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. If 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. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] First, the terms used in this utility model are defined. Front underbody protection refers to a special front underbody protection device or a vehicle body, frame component or other component that can have the front underbody protection function by virtue of its own appearance and characteristics. When working, the front underbody protection device can have sufficient blocking force against the force parallel to the longitudinal axis of the vehicle, thereby improving the safety of the vehicle.

[0034] In order to meet the requirement for lightweighting of the whole vehicle, the utility model provides a high-strength front lower protection device and a vehicle with high safety which is equipped with the front lower protection device.

[0035] like Figure 1As shown, in one embodiment, a front lower protection device is provided. The front lower protection device is disposed below the front of the vehicle frame assembly 100 and includes a crossbeam assembly 300 and a connecting member 200. The connecting member 200 is connected to the crossbeam assembly 300 and the vehicle frame assembly 100 respectively, wherein: The crossbeam assembly 300 includes a non-metallic crossbeam 310 and end caps 320. The cross-section of the crossbeam 310 is in the shape of a Chinese character 'Ri' (日). The end caps 320 are disposed at both ends of the crossbeam 310 for closing the ends of the crossbeam 310.

[0036] Among them, the non-metallic crossbeam 310 and end caps 320 are lighter in weight and higher in practicality compared with the current metal front lower protection device. For example, the crossbeam 310 and end caps 320 can be made of a composite material of resin and glass fiber. The resin material is used as the base to provide the shape and structure of the workpiece, and the glass fiber is used as the reinforcing material to increase the strength and stiffness of the workpiece. Compared with materials such as carbon fiber, the composite material of resin and glass fiber is lighter in weight, higher in strength, lower in cost, and also has a certain corrosion resistance, and can be more widely used in the industry, especially suitable for use in harsh environments.

[0037] The cross-section of the crossbeam 310 is in the shape of a Chinese character 'Ri' (日), which can enhance the strength of the crossbeam 310. The crossbeam 310 in the shape of a Chinese character 'Ri' (日) can meet the strength requirements and be made into a cross-section with uneven thickness to provide a higher flexural rigidity. At the same time, the cross-section in the shape of a Chinese character 'Ri' (日) can reduce the amount of material used to a certain extent. When designing the crossbeam 310, the material can be distributed at the most needed positions, thereby improving the material utilization rate. In addition, due to the reduction of the material used in the cross-section structure in the shape of a Chinese character 'Ri' (日), the weight of the structure is reduced to a certain extent, especially suitable for workpieces that require lightweight design.

[0038] In the protection device of this embodiment, non-metallic crossbeam 310 and end caps 320 are used in the crossbeam assembly 300, which greatly reduces the weight of the front lower protection device. Moreover, the cross-section of the crossbeam 310 is in the shape of a Chinese character 'Ri' (日), which improves the protection strength of the front lower protection device. While improving the driving safety of the vehicle, it can also meet the development requirements for the lightweight of the whole vehicle.

[0039] In an exemplary embodiment, the end cap 320 is connected to the crossbeam 310 by a rivet.

[0040] Among them, the end cap 320 is a device disposed on both sides of the crossbeam 310 for closing the crossbeam 310. Referring to Figures 1 to 4 , the crossbeam assembly 300 of this embodiment includes two left and right end caps 320, which are respectively disposed at both ends of the crossbeam 310.

[0041] A pull rivet is a commonly used connection element, usually consisting of a cap, a tube and a rivet column. When in use, the pull rivet is inserted into a pre-drilled hole, and then the tail of the rivet is hammered or squeezed by mechanical or hydraulic pressure to expand it to form a rivet head, thereby fixing and connecting two or more workpieces. Pull rivets are easy to install and do not require special equipment. Only a rivet gun is needed to complete the connection. They are easy to use, and the connection is firm and not easy to loosen. They have high vibration resistance and high connection strength. After using pull rivets to connect, the appearance is neat and no obvious connection marks will be left.

[0042] Reference Figure 4 As shown, the end cover 320 is a closed cover, which is arranged at both ends of the cross beam 310, and the cross-sectional area of ​​the end of the end cover 320 not connected to the cross beam 310 is smaller than the end connected to the cross beam 310. The end cover 320 is connected to the cross beam 310 by rivets, so that there are no sharp corners at both ends of the cross beam assembly 300, which can effectively provide safety assurance and avoid personal injury in the event of a collision.

[0043] In another embodiment, the crossbeam assembly 300 further includes a reinforcing plate 330 , which is connected to the crossbeam 310 so that the crossbeam assembly 300 is connected to the connecting member 200 at the reinforcing plate 330 , wherein: the length of the reinforcing plate 330 in the first direction is related to the spacing between the two connecting members 200 .

[0044] In order to improve the service life of the beam assembly 300 and facilitate operation, a reinforcing plate 330 is provided on the beam assembly 300 to connect the beam assembly 300 with the connecting member 200 through the reinforcing plate 330 .

[0045] Exemplary, reference Figure 1 and Figure 3 The reinforcing plate 330 is arranged at the edge of the cross beam 310 to wrap the corners of the cross beam 310. The front lower protection device of this embodiment is provided with two left and right connecting members 200 when connecting the cross beam assembly 300 to the frame assembly 100. The length direction of the cross beam 310 is taken as the first direction. Since the reinforcing plate 330 is used to strengthen the connection between the cross beam assembly 300 and the connecting member 200, the length of the reinforcing plate 330 in the first direction is related to the spacing between the two connecting members 200.

[0046] Generally speaking, for a front lower protection device including two connectors 200, the length of the reinforcing plate 330 must be at least greater than or equal to the distance between the two connectors 200, and must be less than the length of the crossbeam. Considering the convenience and cost of processing, the length of the reinforcing plate 330 in the first direction should not be too long. If the front lower protection device includes multiple connectors 200 for the sake of connection stability, the length of the reinforcing plate 330 must be greater than the distance between the two end connectors 200.

[0047] In another embodiment, in order to save cost and overall weight, the reinforcing plate 330 may also be provided only at the connection with the connecting member 200. For the place where there is no connecting member 200, the reinforcing plate 330 may not be provided. In this case, the reinforcing plate 330 is a plurality of plates related to the number of connecting members 200 rather than a whole.

[0048] In a further embodiment, the reinforcing plate 330 is threadedly connected to the crossbeam 310 .

[0049] Among them, threaded connection is a common and reliable mechanical connection method, which connects two parts together through the rotational movement of the thread and is widely used in engineering design and manufacturing. Threaded connection is applicable to various materials and has good versatility. At the same time, threaded connection can be repeatedly disassembled and installed, which is convenient for maintenance and replacement of parts. Since the reinforcement plate 330 is used to provide a connection point for the connection between the beam assembly 300 and the connector 200, the beam assembly 300 is reinforced. With the use of the reinforcement plate 330, wear, corrosion and aging may occur, and the threaded connection can flexibly replace the reinforcement plate 330.

[0050] like Figure 3 As shown, in an exemplary embodiment, a first connecting plate 340 is provided inside the crossbeam 310 , and a plurality of nuts 342 are provided on the first connecting plate 340 . The reinforcing plate 330 is threadedly connected to the crossbeam 310 via bolts 344 matching the nuts 342 .

[0051] The reinforcing plate 330 is connected to the cross beam 310 through a first connecting plate 340 disposed inside the cross beam 310. Figure 3 As shown, a plurality of nuts 342 are provided on the first connecting plate 340, which can also be called a nut plate. The first connecting plate 340 is placed on the inner edge of the cross beam 310, and bolts 344 matching the nuts 342 on the first connecting plate 340 are determined. Through the matching of the nuts 342 and the bolts 344, the threaded connection between the connector 200 and the cross beam 310 is achieved.

[0052] It can be understood that the above-mentioned connection method between the connecting member 200 and the beam 310 is only an example, and the connecting member 200 and the beam 310 can also adopt other connection methods which are not limited to the above-mentioned forms, as long as the connecting member 200 and the beam 310 can be connected.

[0053] In another exemplary embodiment, the reinforcing plate 330 is made of metal.

[0054] Among them, metal has high strength and height, can withstand large loads and pressures, can be used stably for a long time in harsh environments, and has good corrosion resistance and wear resistance. Metal materials also have a wide operating temperature range and can maintain good performance at high or low temperatures. At the same time, metal materials are easy to process because of their good plasticity and deformation ability.

[0055] In order to meet the requirements of lightweight vehicle design, this embodiment uses a composite material of light-weight but high-strength resin and glass fiber in the cross beam 310 and the end cover 320. The reinforcing plate 330 uses a metal material, which is easy to process and maintain.

[0056] It is understandable that the reinforcing plate 330 may also be made of other materials rather than limited to metal materials. In actual applications, appropriate materials may be selected according to specific needs and conditions to meet the performance requirements of the product.

[0057] In one embodiment, the connecting member 200 includes an upper wing surface 210, a first support member 220 and a second support member 230, and the intersection of the first support member 220 and the second support member 230 is connected to the second connecting plate 240, wherein: the connecting member 200 is connected to the frame assembly 100 through the upper wing surface 210, and is connected to the crossbeam assembly 300 through the second connecting plate 240.

[0058] Reference Figure 1 and Figure 5 The connecting member 200 is a triangular-shaped support member, including an upper wing surface 210, a first support member 220 and a second support member 230. The triangular-shaped support member enables the connecting member 200 to support the frame assembly 100 when connecting the frame assembly 100 to the crossbeam assembly 300, thereby improving the stability of the connection.

[0059] In order to improve the stability of the connection between the connecting member 200 and the cross beam assembly 300, a second connecting plate 240 is further provided at the intersection of the first support member 220 and the second support member 230. Generally speaking, the front lower protection device includes at least two left and right connecting members 200, and the cross beam assembly 300 is connected to the frame assembly 100 through the connecting members 200 to achieve front lower protection of the vehicle.

[0060] like Figure 5 As shown, in a further embodiment, the upper wing surface 210 is provided with a first mounting hole group 212, and the connecting member 200 is specifically connected to the frame assembly 100 through the first mounting hole group 212; the second connecting plate 240 is provided with a second mounting hole group 242, and the connecting member 200 is specifically connected to the crossbeam assembly 300 through the second mounting hole group 242.

[0061] The first mounting hole group 212 is a plurality of mounting holes opened on the upper wing surface 210, for example, five mounting holes are set on the upper wing surface 210, and are connected to the lower wing surface of the longitudinal beam of the frame assembly 100 by bolts. The second mounting hole group 242 is set at the edge of the second connecting plate 240, for example, four mounting holes are respectively set on the two opposite edges of the second adapter plate, and are connected to the crossbeam assembly 300 of the front lower protection device by bolts, which can improve the stability of the connection.

[0062] It should be noted that there is no restriction on the number and location of the mounting holes in the first mounting hole group 212 and the second mounting hole group 242. The number and location of the mounting holes can be adjusted according to actual application needs under the premise of stable connection and convenient processing.

[0063] It can be understood that the connection method between the above-mentioned connecting member 200 and the frame assembly 100 and the crossbeam assembly 300 can also adopt other forms, and is not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of completing the connection between the connecting member 200 and the frame assembly 100 and the crossbeam assembly 300.

[0064] In another embodiment, the connector 200 further includes a reinforcement structure, which is disposed inside the triangle formed by the upper wing surface 210, the first support member 220 and the second support member 230, and abuts against the inner sides of the upper wing surface 210, the first support member 220 and the second support member 230 respectively.

[0065] The connecting member 200 of this embodiment is mainly used to realize the connection between the cross beam assembly 300 and the frame assembly 100, so as to realize the front and lower protection of the vehicle through the cross beam assembly 300. Therefore, the connecting member 200 plays a key role. A reinforcing structure is set inside the triangle of the connecting member 200 to enhance the strength of the connecting member 200. For example, the reinforcing structure can be as follows Figure 5 The design shown is a hollow design, so as to improve the strength of the connector 200 while meeting the overall lightweight requirements of the vehicle.

[0066] It is understandable that the above-mentioned connecting member 200 can also adopt other forms, and is not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of connecting the crossbeam assembly 300 and the frame assembly 100.

[0067] In one embodiment, a vehicle is provided. The vehicle includes a frame assembly 100 and a front lower protection device as proposed in the above embodiments. The front lower protection device is connected to a lower wing surface of a longitudinal beam of the frame assembly 100 .

[0068] Reference Figures 1 to 5As shown, the vehicle of this embodiment includes a frame assembly 100 and a front lower protection device, wherein the front lower protection device is arranged at the front and lower part of the frame assembly 100, and includes a crossbeam assembly 300 and a connecting member 200, and the connecting member 200 is used to connect the crossbeam assembly 300 and the frame assembly 100. Specifically, the upper wing surface 210 of the connecting member 200 is connected to the lower wing surface of the longitudinal beam of the frame assembly 100 through a first mounting hole group 212; a second connecting plate 240 is also provided at the intersection of the first support member 220 and the second support member 230 of the connecting member 200, and the connecting member 200 is connected to the crossbeam assembly 300 through a second mounting hole group 242 on the second connecting plate 240.

[0069] The crossbeam assembly 300 includes a non-metal crossbeam 310 and an end cap 320. The cross-section of the crossbeam 310 is in the shape of a Japanese character. The end caps 320 are arranged at both ends of the crossbeam 310 to close the ends of the crossbeam 310. In addition, the crossbeam assembly 300 also includes a reinforcing plate 330, which is connected to the crossbeam 310 so that the crossbeam assembly 300 is connected to the connecting member 200 at the reinforcing plate 330.

[0070] Exemplarily, the reinforcing plate 330 is threadedly connected to the cross beam 310. A first connecting plate 340 is provided inside the cross beam 310, and a plurality of nuts 342 are provided on the first connecting plate 340. The reinforcing plate 330 is threadedly connected to the cross beam 310 through bolts 344 matching the nuts 342.

[0071] The vehicle of this embodiment is provided with a front lower protection device at the front lower part of the frame assembly 100, and the front lower protection device includes a crossbeam assembly 300 and a connecting member 200. A non-metallic crossbeam 310 and an end cover 320 are used in the crossbeam assembly 300, for example, a composite material of resin and glass fiber is used, which can greatly reduce the weight of the front lower protection device, and the cross section of the crossbeam 310 is a Japanese-shaped cross section, which improves the protection strength of the front lower protection device. While improving the driving safety of the vehicle, it can also meet the development requirements for lightweighting of the entire vehicle, and has a wide range of uses and strong applicability.

[0072] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0073] 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.

[0074] The above-described 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 present application. 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 present application shall be subject to the attached claims.

Claims

1. A front lower protection device, characterized in that: It is arranged below the front of the vehicle frame assembly. The front lower protection device includes a crossbeam assembly and a connecting piece. The connecting piece is respectively connected to the crossbeam assembly and the vehicle frame assembly. Wherein: The crossbeam assembly includes a non-metallic crossbeam and end caps. The cross-section of the crossbeam is in the shape of a Chinese character 'Ri'. The end caps are arranged at both ends of the crossbeam for closing the ends of the crossbeam.

2. The front lower protection device according to claim 1, characterized in that: The end caps are connected to the crossbeam by rivets.

3. The front lower protection device according to claim 1, characterized in that: The crossbeam assembly further includes a reinforcing plate. The reinforcing plate is connected to the crossbeam so that the crossbeam assembly is connected to the connecting piece at the reinforcing plate. Wherein: The length of the reinforcing plate in the first direction is related to the distance between the two connecting pieces.

4. The front lower protection device according to claim 3, characterized in that: The reinforcing plate is connected to the crossbeam by threads.

5. The front lower protection device according to claim 4, characterized in that: A first connecting plate is arranged inside the crossbeam. A plurality of nuts are arranged on the first connecting plate. The reinforcing plate is threadedly connected to the crossbeam by bolts matching the nuts.

6. The front lower protection device according to claim 3, characterized in that: The reinforcing plate is made of metal.

7. The front lower protection device according to claim 1, characterized in that: The connecting piece includes an upper wing surface, a first support member and a second support member. The intersection of the first support member and the second support member is connected to a second connecting plate. Wherein: The connecting piece is connected to the vehicle frame assembly through the upper wing surface and is connected to the crossbeam assembly through the second connecting plate.

8. The front lower protection device according to claim 7, characterized in that: The upper wing surface is provided with a first set of mounting holes. The connecting piece is specifically connected to the vehicle frame assembly through the first set of mounting holes; the second connecting plate is provided with a second set of mounting holes. The connecting piece is specifically connected to the crossbeam assembly through the second set of mounting holes.

9. The front lower protection device according to claim 7, characterized in that: The connecting piece further includes a reinforcing structure. The reinforcing structure is arranged inside the triangle formed by the upper wing surface, the first support member and the second support member and is respectively in contact with the inner sides of the upper wing surface, the first support member and the second support member.

10. A vehicle, characterized in that: It includes a vehicle frame assembly and the front lower protection device according to any one of claims 1 to 9. The front lower protection device is connected to the lower wing surface of the longitudinal beam of the vehicle frame assembly.

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