Threshold reinforcement structure and vehicle

Abstract

The application provides a threshold reinforcing structure and a vehicle. The threshold reinforcing structure is applied to a threshold. The threshold has a threshold inner cavity. The threshold comprises a threshold beam arranged in the threshold inner cavity. The threshold reinforcing structure comprises a reinforcing inner plate and a first reinforcing module in the threshold inner cavity. The reinforcing inner plate is connected with a cavity wall of the threshold inner cavity. The first reinforcing module comprises a first support. The first support is connected with the threshold beam. The first support is connected with at least one of the cavity wall of the threshold inner cavity and the reinforcing inner plate. The threshold reinforcing structure can improve the structural strength of the threshold, thereby improving the safety of the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a door sill reinforcement structure and a vehicle. Background Technology

[0002] The door sill and B-pillar of a vehicle are key load-bearing areas in side-impact collisions. Their structural design strength is directly related to the safety of the passenger compartment. The door sill and B-pillar need to have sufficient strength to cope with side-impact loads and avoid excessive crumple that could squeeze the survival space of the passenger compartment and the battery pack.

[0003] Existing vehicle door sill structures have limited strength, and under side pillar collision conditions, they are prone to large-scale crumple deformation and weld tearing, which affects the vehicle's safety performance. Utility Model Content

[0004] The purpose of this application is to solve the aforementioned technical problems by providing a door sill reinforcement structure and a vehicle, thereby increasing the structural strength of the door sill and thus improving vehicle safety. To achieve the above objective, the technical solution of this application is as follows:

[0005] In a first aspect, this application provides a threshold reinforcement structure applied to a threshold. The threshold has a threshold cavity and includes a threshold beam disposed in the threshold cavity. The threshold reinforcement structure includes a reinforcement inner plate and a first reinforcement module located in the threshold cavity. The reinforcement inner plate is connected to the cavity wall of the threshold cavity. The first reinforcement module includes a first bracket, which is connected to the threshold beam and is connected to at least one of the cavity wall of the threshold cavity and the reinforcement inner plate.

[0006] In one possible implementation, the reinforcing inner panel includes a first reinforcing part and a second reinforcing part. The second reinforcing part is disposed at the top and bottom of the first reinforcing part. The first reinforcing part abuts against the side wall of the sill cavity, and the second reinforcing part abuts against the top wall and bottom wall of the sill cavity, respectively.

[0007] In one possible implementation, the first bracket includes a first support portion, a second support portion, and a third support portion. The first support portion and the second support portion are connected to form an angle. The first support portion abuts against the bottom of the sill beam. The second support portion is connected to the bottom wall of the sill cavity. The third support portion is disposed at both ends of the second support portion along the length direction of the vehicle body. The third support portion abuts against the reinforcing inner panel.

[0008] In one possible implementation, the first bracket further includes a fourth support portion, which is disposed at both ends of the first support portion along the length direction of the vehicle body, and extends downward to the third support portion.

[0009] In one possible implementation, the first reinforcing module further includes a second bracket, the top of which is connected to the top wall of the sill cavity, and the bottom of which is connected to the sill beam.

[0010] In one possible implementation, the first reinforcing module is located between the A-pillar and the B-pillar, and the first bracket and the second bracket are arranged correspondingly along the height direction of the vehicle body.

[0011] In one possible implementation, the sill reinforcement structure further includes a second reinforcement module located in the sill cavity, at the junction of the sill and the B-pillar.

[0012] In one possible implementation, the second reinforcing module includes a third bracket and a fourth bracket, which are arranged correspondingly along the height direction of the vehicle body.

[0013] In one possible implementation, the top of the third bracket is connected to the top wall of the sill cavity and the B-pillar, respectively, and the bottom of the third bracket is connected to the sill beam; the top of the fourth bracket is connected to the sill beam, and the bottom of the fourth bracket is connected to the bottom wall of the sill cavity.

[0014] Secondly, this application provides a vehicle including the aforementioned door sill reinforcement structure.

[0015] Compared with existing technologies, the main benefits of this application's enhanced threshold structure and vehicle are as follows:

[0016] The top of the first bracket is connected to the sill beam, and the bottom of the first bracket can be connected to the cavity wall of the sill cavity. The first bracket can transfer the collision force along the height direction of the vehicle body to the sill beam and the sill respectively, improving the force transmission effect of the sill beam along the height direction of the vehicle body. The first bracket can also be connected to the reinforcing inner panel so that the first bracket can transfer the collision force to the reinforcing inner panel and the sill, improving the overall structural strength and collision bearing capacity of the sill. Under the side pillar collision condition, the sill collapse deformation is small and it is not easy to tear, thus protecting the safety performance of the passenger compartment. Attached Figure Description

[0017] Figure 1 A schematic diagram of a front door ring assembly provided for an embodiment of this application;

[0018] Figure 2 for Figure 1 The threshold shown is a partial structural diagram of one embodiment;

[0019] Figure 3 for Figure 1 The threshold shown is a cross-sectional schematic diagram of AA in one embodiment;

[0020] Figure 4 for Figure 1The threshold shown is a cross-sectional schematic diagram of BB in one embodiment;

[0021] Figure 5 for Figure 1 The threshold shown is a cross-sectional schematic diagram of CC in one embodiment.

[0022] Figure 6 for Figure 2 The diagram shown is a structural schematic of the reinforced inner plate in one embodiment.

[0023] Figure 7 for Figure 2 The diagram shown is a structural schematic of one embodiment of the threshold beam;

[0024] Figure 8 for Figure 2 The first support shown is a structural schematic diagram of one embodiment;

[0025] Figure 9 for Figure 2 The second support shown is a structural schematic diagram of one embodiment;

[0026] Figure 10 for Figure 2 The third support shown is a structural schematic diagram of one embodiment;

[0027] Figure 11 for Figure 2 The fourth support shown is a structural schematic diagram of one embodiment.

[0028] Figure label:

[0029] Threshold 1, Threshold Inner Panel 11, Threshold Outer Panel 12, Threshold Inner Cavity 13;

[0030] Threshold beam 2, beam inner cavity 21, B-pillar inner plate 22;

[0031] Reinforced inner panel 3, first reinforcing part 31, second reinforcing part 32;

[0032] First reinforcing module 4, first bracket 41, second bracket 42;

[0033] Second reinforcing module 5, third bracket 51, fourth bracket 52;

[0034] First support part 61, second support part 62, third support part 63, fourth support part 64, first reinforcing rib 65, bend 66, bracket groove 67;

[0035] First support body 71, second support body 72, second reinforcing rib 73, first force guiding rib 74, first flange 75;

[0036] First connecting part 81, second connecting part 82, second guiding rib 83, second flange 84;

[0037] First connector 91, second connector 92, third reinforcing rib 93. Detailed Implementation

[0038] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0039] Example 1

[0040] This embodiment provides a sill reinforcement structure applied to sill 1. By setting the sill reinforcement structure, the structural strength of sill 1 can be improved, ensuring the force transmission function of sill 1, A-pillar, and B-pillar. For example, Figure 1 , Figure 2 As shown, the X-axis is defined as the length direction of the vehicle body, the Y-axis is defined as the width direction of the vehicle body, and the Z-axis is defined as the height direction of the vehicle body. The following is a detailed explanation.

[0041] like Figures 1-11 As shown, the sill 1 has a sill cavity 13. Specifically, the sill 1 includes an inner sill plate 11 and an outer sill plate 12. The inner sill plate 11 and the outer sill plate 12 are connected to form the sill cavity 13. The inner sill plate 11 has an inner opening groove facing the outside of the vehicle body, and the outer sill plate 12 has an outer opening groove facing the inside of the vehicle body. The inner opening groove and the outer opening groove are connected to form the sill cavity 13. The sidewalls of the sill cavity 13 are the bottom walls of the inner opening groove and the outer opening groove. The top wall of the sill cavity 13 is a part of the area where the inner sill plate 11 and the outer sill plate 12 are connected, and the bottom wall of the sill cavity 13 is another part of the area where the inner sill plate 11 and the outer sill plate 12 are connected. The sill cavity 13 is roughly rectangular and has a collision energy absorption function.

[0042] The sill 1 includes a sill beam 2 disposed in the sill cavity 13. The sill beam 2 is not directly connected to the sill inner panel 11 and the sill outer panel 12, but is indirectly connected to the sill 1 through a sill reinforcement structure. When a side pillar collision occurs, the sill outer panel 12 is located in the external space of the vehicle body. The sill outer panel 12 is the first-level load-bearing structure, the sill beam 2 is the second-level load-bearing structure, and the sill inner panel 11 is the third-level load-bearing structure. The cavity wall of the sill cavity 13 and the sill beam 2 deform and collapse step by step, which can gradually dissipate the side pillar collision energy, reduce the collision energy to the internal space of the vehicle body, and thus reduce the crush damage to the occupants and battery pack.

[0043] The sill reinforcement structure includes a reinforcing inner plate 3 and a first reinforcing module 4 located in the sill cavity 13. The first reinforcing module 4 includes a first support 41. The reinforcing inner plate 3 is connected to the cavity wall of the sill cavity 13, and the first support 41 is connected to the sill beam 2. The first support 41 is connected to at least one of the cavity wall of the sill cavity 13 and the reinforcing inner plate 3. Specifically, the top of the first support 41 is connected to the sill beam 2, the bottom of the first support 41 is connected to the cavity wall of the sill cavity 13, and the middle part of the first support 41 is connected to the reinforcing inner plate 3.

[0044] The reinforcing inner plate 3 is installed on the cavity wall of the inner cavity 13 of the sill. Specifically, the reinforcing inner plate 3 is connected to the inner sill plate 11, and the connection method can be welding. The connection between the reinforcing inner plate 3 and the inner sill plate 11 effectively improves the connection strength of the sill 1 and the load-bearing capacity of the side post of the sill 1 during collision.

[0045] For example, the top of the first bracket 41 is connected to the sill beam 2, which is arranged along the length of the vehicle body. The sill beam 2 is approximately cuboid and has an inner cavity 21. The inner cavity 21 is divided into multiple sub-cavities by ribs, which has a good energy absorption effect. Specifically, the sill beam 2 extends from the A-pillar to the rear of the B-pillar. The length of the sill beam 2 exceeds the length of the battery pack located in the interior space of the vehicle body, which can provide maximum protection for the battery pack and reduce the risk of the sill 1 collapsing and deforming to crush the battery pack in a side pillar collision.

[0046] The top of the first bracket 41 is connected to the bottom of the sill beam 2, and the bottom of the first bracket 41 is connected to the cavity wall of the sill inner cavity 13. Specifically, the bottom of the first bracket 41 extends between the inner sill plate 11 and the outer sill plate 12, and is connected to the inner sill plate 11 and the outer sill plate 12 respectively. The first bracket 41 can transmit the collision force along the height direction of the vehicle body to the sill beam 2 and the cavity wall of the sill inner cavity 13 respectively, improving the force transmission effect of the sill beam 2 along the height direction of the vehicle body. The middle part of the first bracket 41 is connected to the reinforcing inner plate 3, so that the first bracket 41 can transmit the collision force to the reinforcing inner plate 3 and the sill 1, improving the overall structural strength and collision bearing capacity of the sill 1. Under the side pillar collision condition, the sill 1 has a small amount of collapse deformation and is not prone to tearing, thus protecting the internal safety performance of the passenger compartment.

[0047] In one embodiment, the reinforcing inner plate 3 includes a first reinforcing part 31 and a second reinforcing part 32. The second reinforcing part 32 is disposed at the top and bottom of the first reinforcing part 31. The first reinforcing part 31 abuts against the side wall of the sill cavity 13, and the second reinforcing part 32 abuts against the top wall and bottom wall of the sill cavity 13, respectively.

[0048] For example, the first reinforcing part 31 is connected to the inner sill plate 11, the inner sill plate 11 has an inner opening groove, and both the inner opening groove and the reinforcing inner plate 3 are generally C-shaped. The first reinforcing part 31 is connected to the bottom wall of the inner opening groove, and the second reinforcing part 32 is connected to the side wall of the inner opening groove. The reinforcing inner plate 3 is adapted to the inner sill plate 11 to improve the structural strength of the inner sill plate 11. The reinforcing inner plate 3 and the inner sill plate 11 can be fixed by welding.

[0049] In one embodiment, the first bracket 41 includes a first support portion 61, a second support portion 62, and a third support portion 63. The first support portion 61 and the second support portion 62 are connected to form an approximately L-shaped structure. The first support portion 61 abuts against the sill beam 2, the second support portion 62 is connected to the bottom wall of the sill cavity 13, and the third support portion 63 is disposed at both ends of the second support portion 62 along the length direction of the vehicle body. The third support portion 63 abuts against the reinforcing inner plate 3.

[0050] The first support part 61 abuts against the bottom of the sill beam 2, and the first support part 61 and the sill beam 2 can be fixed by riveting; the second support part 62 extends between the inner sill plate 11 and the outer sill plate 12, and is fixed to the inner sill plate 11 and the outer sill plate 12 by welding respectively.

[0051] Multiple first reinforcing ribs 65 are provided at the connection between the first support part 61 and the second support part 62 to improve the bending strength of the first bracket 41 and reduce the probability of deformation of the first bracket 41 under stress.

[0052] One end of the third support part 63 is connected to the second support part 62, and the other end of the third support part 63 is provided with a bend 66, which abuts against the first reinforcing part 31 and is fixed by welding. The third support part 63 is perpendicularly connected to the second support part 62. The first bracket 41 transmits the collision force to the reinforcing inner plate 3 along the width direction of the vehicle body through the third support part 63. Moreover, the second support part 62 is provided with two third support parts 63, which improves the stability and force transmission effect of the first bracket 41.

[0053] In one embodiment, the first bracket 41 further includes a fourth support portion 64, which is disposed at both ends of the first support portion 61 along the length direction of the vehicle body, and extends downward to the third support portion 63.

[0054] The first support part 61, the second support part 62, the third support part 63 and the fourth support part 64 surround to form a support groove 67. The fourth support part 64 can strengthen the structural strength between the first support part 61 and the third support part 63, so that the first support 41 can further improve the collision energy absorption effect through the support groove 67. The third support part 63 and the fourth support part 64 can quickly disperse the collision force and reduce the amount of collapse deformation of the sill cavity 13 where the first support 41 is located.

[0055] In one embodiment, the first reinforcing module 4 further includes a second bracket 42, the top of which is connected to the top wall of the sill cavity 13, and the bottom of which is connected to the sill beam 2.

[0056] The second support 42 includes a first support body 71 and a second support body 72, which are connected to form an approximately L-shaped structure. Multiple second reinforcing ribs 73 are provided at the connection between the first support body 71 and the second support body 72 to improve the structural strength of the second support 42. The first support body 71 extends between the inner sill plate 11 and the outer sill plate 12 and is fixed to the inner sill plate 11 by welding. The second support body 72 is fixed to the top of the sill beam 2 by riveting.

[0057] The second support body 72 is provided with a first force guide rib 74 extending along the width direction of the vehicle body. The first force guide rib 74 is located in the middle of the second support body 72 and is used to guide the force flow to be quickly transmitted to the sill 1. At the same time, it can improve the bending strength of the second support body 72.

[0058] The second support body 72 is provided with first flanges 75 at both ends along the length of the vehicle body. The first flanges 75 extend upward to further enhance the bending resistance of the second support body 72.

[0059] In one embodiment, the first reinforcing module 4 is located between the A-pillar and the B-pillar, and the first bracket 41 and the second bracket 42 are arranged correspondingly along the height direction of the vehicle body, so that the sill 1 has high dynamic and static stiffness along the height direction of the vehicle body, effectively reducing vibration and noise, thereby improving the NVH performance of the vehicle.

[0060] In one embodiment, the sill reinforcement structure further includes a second reinforcement module 5 located in the sill cavity 13. The second reinforcement module 5 is disposed at the junction of the sill 1 and the B-pillar and is connected to the sill beam 2.

[0061] The sill beam 2 is fixed to the inner cavity 13 of the sill by the second reinforcing module 5. The second reinforcing module 5 can also strengthen the structure at the junction of the sill 1 and the B-pillar, effectively dispersing the collision force at the junction of the sill 1 and the B-pillar, avoiding tearing at the junction of the sill 1 and the B-pillar in the case of side column collision, and improving the structural performance of the sill beam 2.

[0062] In one embodiment, the second reinforcing module 5 includes a third bracket 51 and a fourth bracket 52, which are arranged correspondingly along the height direction of the vehicle body to make the sill 1 have high dynamic and static stiffness along the height direction of the vehicle body, effectively reducing vibration and noise, thereby improving the NVH performance of the vehicle.

[0063] In one embodiment, the top of the third bracket 51 is connected to the top wall of the sill cavity 13 and the B-pillar, respectively, and the bottom of the third bracket 51 is connected to the sill beam 2; the top of the fourth bracket 52 is connected to the sill beam 2, and the bottom of the fourth bracket 52 is connected to the bottom wall of the sill cavity 13.

[0064] The third bracket 51 includes a first connecting part 81 and a second connecting part 82, which are connected to form an approximately L-shaped structure. The B-pillar includes an outer B-pillar panel and an inner B-pillar panel 22. The bottom of the inner B-pillar panel 22 overlaps with the top of the inner sill panel 11. The first connecting part 81 extends between the inner sill panel 11 and the inner B-pillar panel 22, and is fixed to both panels by welding. The second connecting part 82 is fixed to the sill beam 2 by riveting. The sill beam 2 is fixed to the junction of the top wall of the inner sill cavity 13 and the B-pillar by the third bracket 51, ensuring the structural strength of the junction between the sill 1 and the B-pillar and reducing the amount of collapse deformation in the event of a side pillar collision.

[0065] The first connecting part 81 is provided with a plurality of second force guiding ribs 83 extending along the height direction of the vehicle body, which are used to guide the force flow to be quickly transmitted to the junction of the sill 1 and the B-pillar; at the same time, they can improve the bending strength of the first connecting part 81.

[0066] The second connecting part 82 is provided with second flanges 84 at both ends along the length of the vehicle body. The second flanges 84 extend upward to improve the bending resistance of the second connecting part 82.

[0067] The fourth bracket 52 includes a first connecting body 91 and a second connecting body 92. The first connecting body 91 and the second connecting body 92 are connected to form an approximately L-shaped structure. The first connecting body 91 is fixed to the bottom of the sill beam 2 by riveting. The second connecting body 92 extends between the inner sill plate 11 and the outer sill plate 12, and is fixed to the inner sill plate 11 and the outer sill plate 12 by welding, respectively.

[0068] The second connecting body 92 has multiple third reinforcing ribs 93 arranged along the height direction of the vehicle body. One end of the third reinforcing rib 93 extends to the connection between the first connecting body 91 and the second connecting body 92. The third reinforcing rib 93 is a long strip groove structure with a width that gradually decreases from top to bottom. The third reinforcing rib 93 effectively improves the structural strength of the second connecting body 92, thereby improving the force transmission stability of the fourth bracket 52. The sill beam 2 is connected to the bottom wall of the sill cavity 13 through the fourth bracket 52. When the side pillar collision occurs, the collision force at the junction of the sill 1 and the B pillar can be transmitted through the third bracket 51, the sill beam 2, and the fourth bracket 52, ensuring the structural strength at the junction of the sill 1 and the B pillar and reducing the amount of collapse deformation of the sill 1 during the side pillar collision.

[0069] In one embodiment, the front door ring assembly includes a sill reinforcement structure, and the front door ring assembly also includes a lower outer A-pillar panel and an upper outer A-pillar panel. The lower outer A-pillar panel, the upper outer A-pillar panel, the outer B-pillar panel, and the sill panel 12 are welded together to form an integral structure, ensuring the structural integrity of the front door ring assembly and thereby improving the safety of side pillar collisions.

[0070] Example 2

[0071] This embodiment provides a vehicle including the sill reinforcement structure described in the above embodiment. The vehicle has the beneficial effects brought by the sill reinforcement structure, which will not be elaborated here.

[0072] In the description of this application, it should be understood that the terms "length", "width", "height", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0075] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0076] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A threshold reinforcement structure applied to a threshold (1), the threshold (1) having a threshold cavity (13), the threshold (1) including a threshold beam (2) disposed in the threshold cavity (13), characterized in that: The threshold reinforcement structure includes a reinforcing inner plate (3) and a first reinforcement module (4) located in the threshold cavity (13). The reinforcing inner plate (3) is connected to the cavity wall of the threshold cavity (13). The first reinforcement module (4) includes a first bracket (41), which is connected to the threshold beam (2). The first bracket (41) is connected to at least one of the cavity wall of the threshold cavity (13) and the reinforcing inner plate (3).

2. The threshold reinforcement structure according to claim 1, characterized in that: The reinforced inner plate (3) includes a first reinforcing part (31) and a second reinforcing part (32). The second reinforcing part (32) is disposed at the top and bottom of the first reinforcing part (31). The first reinforcing part (31) abuts against the side wall of the threshold cavity (13). The second reinforcing part (32) abuts against the top wall and bottom wall of the threshold cavity (13) respectively.

3. The threshold reinforcement structure according to claim 1, characterized in that: The first bracket (41) includes a first support part (61), a second support part (62) and a third support part (63). The first support part (61) and the second support part (62) are connected to form an angle. The first support part (61) abuts against the bottom of the sill beam (2). The second support part (62) is connected to the bottom wall of the sill cavity (13). The third support part (63) is disposed at both ends of the second support part (62) along the length direction of the vehicle body. The third support part (63) abuts against the reinforcing inner plate (3).

4. The threshold reinforcement structure according to claim 3, characterized in that: The first bracket (41) further includes a fourth support portion (64), which is disposed at both ends of the first support portion (61) along the length direction of the vehicle body, and extends downward to the third support portion (63).

5. The threshold reinforcement structure according to claim 1, characterized in that: The first reinforcing module (4) also includes a second bracket (42), the top of which is connected to the top wall of the sill cavity (13), and the bottom of which is connected to the sill beam (2).

6. The threshold reinforcement structure according to claim 5, characterized in that: The first reinforcing module (4) is located between the A-pillar and the B-pillar, and the first bracket (41) and the second bracket (42) are arranged correspondingly along the height direction of the vehicle body.

7. The threshold reinforcement structure according to claim 1, characterized in that: The threshold reinforcement structure also includes a second reinforcement module (5) located in the inner cavity (13) of the threshold, and the second reinforcement module (5) is disposed at the junction of the threshold (1) and the B-pillar.

8. The threshold reinforcement structure according to claim 7, characterized in that: The second reinforcing module (5) includes a third bracket (51) and a fourth bracket (52), which are arranged correspondingly along the height direction of the vehicle body.

9. The threshold reinforcement structure according to claim 8, characterized in that: The top of the third bracket (51) is connected to the top wall of the threshold cavity (13) and the B-pillar respectively, and the bottom of the third bracket (51) is connected to the threshold beam (2); the top of the fourth bracket (52) is connected to the threshold beam (2), and the bottom of the fourth bracket (52) is connected to the bottom wall of the threshold cavity (13).

10. A vehicle, characterized in that: Includes the threshold reinforcement structure as described in any one of claims 1-9.

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