Threshold beam assembly and vehicle

Abstract

The utility model provides a doorsill beam assembly and a vehicle, the doorsill beam assembly comprises a doorsill beam outer plate and a doorsill beam inner plate which define a doorsill beam cavity, and further comprises a first reinforcing part and a second reinforcing part which are arranged in the doorsill beam cavity, the first reinforcing part is located below a vehicle A column, and the second reinforcing part is located below a vehicle B column. The doorsill beam comprises a reinforcing framework and thermal expansion glue arranged on the reinforcing framework, and the thermal expansion glue can be connected with the doorsill beam outer plate and the doorsill beam inner plate after being heated and expanded. The second reinforcing part is arranged behind the first reinforcing part and extends in the length direction of the doorsill beam cavity. The doorsill beam assembly has the advantages of being high in structural strength and low in production cost, facilitates control over the manufacturing cost of a whole vehicle, and can meet the requirement for light weight of the vehicle.

Description

Technical Field

[0001] The utility model relates to the technical field of a vehicle door sill beam structure, in particular to a door sill beam assembly.

[0002] The utility model also relates to a vehicle comprising the door sill beam assembly. Background Art

[0003] The sill beam assembly is an important part of the vehicle's body structure. It is located under the doors on both sides of the vehicle, connecting the front and rear wheel arches, and is set along the length of the vehicle's side. The design and material selection of the sill beam are crucial to the passive safety performance of the vehicle, especially in side impact tests, where the performance of the sill beam directly affects the safety of passengers. With the advancement of automotive industry technology, the structural design of the sill beam is also being continuously optimized to meet higher safety standards and lightweight requirements.

[0004] At present, the common vehicle sill beam structure is usually equipped with an extruded aluminum alloy reinforcement beam in the sill beam sheet metal structure. This sill beam structure will be accompanied by a large consumption of aluminum alloy profiles during the production process, which is not conducive to the control of vehicle production costs. In addition, the use of more metal structural parts with higher comprehensive density further increases the weight of the vehicle.

[0005] In the prior art, there are related literature reports on the technical solution of using structural adhesive blocks to replace extruded aluminum alloy reinforcement beams. In this technical solution, a large amount of structural adhesive is filled through the door sill beam sheet metal structure to achieve the purpose of reducing production costs and vehicle weight. However, the structural adhesive will absorb heat during the painting and baking process of the door sill beam. Filling a large amount of structural adhesive in the sheet metal cavity will cause the local temperature of the sheet metal structure to be too low, which is not conducive to the drying of the surface electrophoretic paint and has an adverse effect on the efficiency of the painting and baking process. Utility Model Content

[0006] In view of this, the utility model aims to propose a threshold beam assembly, which has the advantages of good structural strength and low production cost, is conducive to the control of the cost of the whole vehicle, and meets the lightweight requirements of the vehicle.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] The utility model provides a threshold beam assembly, comprising a threshold beam outer plate and a threshold beam inner plate surrounding a threshold beam cavity, and a first reinforcement portion and a second reinforcement portion arranged in the threshold beam cavity;

[0009] The first reinforcement portion is located below the A-pillar of the vehicle and includes a reinforcement frame and a heat expansion adhesive disposed on the reinforcement frame, wherein the heat expansion adhesive is capable of connecting the sill beam outer plate and the sill beam inner plate when expanded by heat;

[0010] The second reinforcement portion is arranged behind the first reinforcement portion, and the second reinforcement portion extends along the length direction of the door sill beam cavity.

[0011] Further, the reinforcement frame and the threshold beam outer plate are connected by a first connecting member;

[0012] A limiting member is provided between the reinforcement frame and the threshold beam outer plate, and the limiting member is used to limit the installation position of the first reinforcement part on the threshold beam inner plate.

[0013] Furthermore, the thickness of the reinforcement frame is 2 mm to 4 mm, and the distance between the reinforcement frame and the threshold beam outer plate / the threshold beam inner plate is greater than or equal to 3 mm;

[0014] The thickness of the thermal expansion adhesive before thermal expansion is 2 mm to 4 mm, and the distance between the thermal expansion adhesive and the threshold beam outer plate / the threshold beam inner plate before thermal expansion is 3 mm.

[0015] Further, the second reinforcement portion is connected to the sill beam inner plate through a plurality of second connecting members;

[0016] A glue coating groove is provided on one side of the second reinforcement portion facing the inner plate of the sill beam, and the second reinforcement portion can also be connected to the inner plate of the sill beam by means of adhesive provided in the glue coating groove.

[0017] Furthermore, the second connecting members are provided on both the upper side and the lower side of the second reinforcement portion, and the second connecting members on the upper side and the second connecting members on the lower side are staggered in the length direction of the door sill beam cavity.

[0018] Furthermore, a main cavity is provided in the second reinforcement part, and a partition is provided in the main cavity to divide the main cavity into a plurality of sub-cavities, and each of the sub-cavities passes through the second reinforcement part along the length direction of the door sill beam cavity.

[0019] Furthermore, a gap between an upper surface of the second reinforcement portion and a top wall of the sill beam cavity is greater than or equal to 5 mm, a gap between a lower surface of the second reinforcement portion and a bottom wall of the sill beam cavity is greater than or equal to 5 mm, and a gap between an outer side surface of the second reinforcement portion and an outer side wall of the sill beam cavity is greater than or equal to 5 mm.

[0020] Furthermore, the second reinforcement portion is made of aluminum alloy.

[0021] Furthermore, the distance between the first reinforcement part and the second reinforcement part in the two length directions of the door sill is 5 mm to 10 mm. Compared with the prior art, the utility model has the following advantages:

[0022] The sill beam assembly and the vehicle described in the utility model include a sill beam outer plate and a sill beam inner plate, which are spliced ​​and buckled to form a sill beam cavity, and a first reinforcement portion located below the A-pillar of the vehicle and a second reinforcement portion located behind the first reinforcement portion are respectively arranged in the sill beam cavity along the length direction of the vehicle body.

[0023] By arranging the first reinforcement part and the second reinforcement part in the cavity of the sill beam, the structural strength of the sill beam assembly can be better strengthened, which is beneficial to improving the impact resistance of the vehicle. By arranging the first reinforcement part at the lower part of the A-pillar of the vehicle and arranging the second reinforcement part behind the first reinforcement part and extending along the length direction of the sill beam, the overall structural strength of the sill beam can be strengthened along the entire length direction of the sill beam. The first reinforcement part includes a reinforcement frame and a thermal expansion adhesive, which has the advantages of high structural strength and light weight, and has good crush energy absorption performance. Due to the introduction of the first reinforcement part, compared with the structure of the prior art in which an extruded aluminum alloy reinforcement beam is arranged throughout the body, the production cost is lower and the weight is lower, which is beneficial to meet the requirements of lightweight design of the whole vehicle.

[0024] In addition, by arranging the first connecting member and the limiting member on the reinforcing frame, the positioning and fixing of the reinforcing frame are limited. The first connecting member can be made of standard parts such as bolts and screws to reduce processing costs, and the processing and disassembly are relatively convenient. The limiting member is arranged between the reinforcing frame and the threshold, which is convenient for quickly finding the installation position of the reinforcing frame in the threshold beam cavity, which is conducive to improving assembly accuracy and assembly efficiency. By limiting the thickness of the reinforcing frame and the distance between the reinforcing frame and the threshold beam outer plate or the threshold beam inner plate, the thermal expansion adhesive can have good bonding reliability while ensuring that the reinforcing frame has sufficient mechanical strength and load-bearing capacity.

[0025] Secondly, the glue groove provided on the second reinforcement part plays a role in maintaining the position of the structural glue, which can facilitate the application and solidification process of the structural glue, thereby ensuring the reliability of the connection between the second reinforcement part and the inner plate of the sill beam. By providing the second connecting member on the second reinforcement part, the relative position of the second reinforcement part and the inner plate of the sill beam can be fixed. By staggering the second connecting member on the upper side of the second reinforcement part and the second connecting member on the lower side of the second reinforcement part in the length direction of the sill beam assembly, it is beneficial to improve the reliability of the connection between the second reinforcement part and the inner plate of the sill beam, so that the second reinforcement part and the inner plate of the sill beam are evenly connected in the entire length direction of the sill beam assembly, the connection is firm and reliable, and the second reinforcement part can be effectively prevented from slipping.

[0026] Furthermore, by arranging a partition inside the second reinforcement part, the main cavity is divided into a plurality of sub-cavities, which has a good weight reduction effect while ensuring the structural strength, thereby achieving better control over the weight of the whole vehicle. The second reinforcement part can be made by directly cutting existing profiles, which is beneficial to further reduce production costs. By setting a gap between the second reinforcement part and the top, inner wall and bottom of the sill beam cavity, the installation position of the second reinforcement part can be limited, which is beneficial to better ensure the reinforcement effect of the sill beam assembly. By setting the second reinforcement part to be made of aluminum alloy material and cooperating with the first reinforcement part to form a composite material reinforcement structure, it is possible to take into account various requirements such as structural strength, lightweight and production cost, and simplify the assembly process of the sill beam. When applied to vehicles, it is beneficial to improve the comprehensive performance of the vehicle.

[0027] Moreover, by limiting the gap between the second reinforcement part and the top wall, bottom wall and outer side wall of the sill beam cavity, the installation position of the second reinforcement part can be limited, which is conducive to better ensuring the reinforcement effect of the sill beam assembly. By limiting the gap between the first reinforcement part and the second reinforcement part, sufficient space can be reserved for the collapse deformation of the first reinforcement part after a collision occurs, ensuring the collapse energy absorption effect of the first reinforcement part, and avoiding the collision between the first reinforcement part and the second reinforcement part under normal conditions.

[0028] In addition, the utility model also provides a vehicle provided with the door sill beam assembly.

[0029] The vehicle described in the utility model has the same beneficial effects as the door sill beam assembly described above relative to the prior art, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0031] Figure 1 This is a schematic structural diagram of a threshold beam assembly in an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of the internal structure of the threshold beam assembly;

[0033] Figure 3 This is a schematic diagram of the structure of the first reinforcement part in the embodiment of the present application;

[0034] Figure 4 It is a schematic structural diagram of the second reinforcement part in the embodiment of the present application.

[0035] Description of reference numerals:

[0036] 1. Threshold beam cavity; 2. Threshold beam outer plate; 3. Threshold beam inner plate;

[0037] 4. The first reinforcement part;

[0038] 401, reinforcing frame; 402, thermal expansion adhesive; 403, first connecting member; 404, limiting member;

[0039] 5. The second reinforcement part;

[0040] 501, second connecting member; 502, glue coating groove; 503, partition. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0042] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] Taking a sill beam assembly and a vehicle described in the utility model as an example, the directional words used in the embodiments, such as "up, down, left, right, front, and back", are defined based on the up and down direction (also called the height direction, or the Z direction of the whole vehicle), the left and right direction (also called the width direction, or the Y direction of the whole vehicle), and the front and rear direction (also called the length direction, or the X direction of the whole vehicle). "Inside and outside" are defined based on the contour of the corresponding parts. For example, "inside" and "outside" are defined based on the contour of the vehicle, and the side of the vehicle contour close to the middle of the vehicle is "inside", and the opposite is "outside".

[0044] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0045] The following will refer to the attached Figure 1 To Attachment Figure 4 The utility model is described in detail in conjunction with the embodiments.

[0046] Embodiment 1

[0047] This embodiment relates to a threshold beam assembly, which combines two reinforcement structures made of different materials to have the advantages of the two reinforcement structures of different materials, meet the needs of different situations, and overcome the defects and shortcomings caused by the use of a single material reinforcement structure, thereby improving the structural strength and collision performance of the threshold beam assembly, and reducing the production cost and overall weight of the threshold beam assembly. By adopting the threshold beam assembly involved in this embodiment, it is beneficial to control the production cost of the whole vehicle and meet the needs of the lightweight development of the vehicle, thereby improving the overall quality and comprehensive performance of the vehicle.

[0048] In terms of overall structure, refer to Figure 1 and Figure 2 The sill beam assembly of this embodiment includes a sill beam cavity 1, a sill beam outer plate 2, a sill beam inner plate 3, a first reinforcement part 4 and a second reinforcement part 5. The sill beam outer plate 2 and the sill beam inner plate 3 are interlocked by welding, and the cavity formed is the sill beam cavity 1. The first reinforcement part 4 and the second reinforcement part 5 are fixedly installed in the sill beam cavity 1 to form a support and structural reinforcement for the sill beam outer plate 2 and the sill beam inner plate 3. The first reinforcement part 4 is arranged below the A-pillar of the vehicle, and includes a reinforcement frame 401 and a thermal expansion adhesive 402 for fixing the reinforcement frame 401. The thermal expansion adhesive 402 is coated in the gap between the surface of the reinforcement frame 401 and the sill beam outer plate 2 or the sill beam inner plate 3, and can be bonded between the sill beam outer plate 2 or the sill beam inner plate 3 and the reinforcement frame 401 after thermal expansion. The second reinforcement part 5 is arranged behind the first reinforcement part 4, and is fixedly arranged on the sill beam inner plate 3 along the length direction of the sill beam cavity 1.

[0049] As set above, the first reinforcement part 4 and the second reinforcement part 5 are made of different materials. The first reinforcement part 4 has a good crushing energy absorption effect and a low average density, which can reduce the overall weight of the threshold beam assembly, conforming to the direction of vehicle lightweight design, and has a low production cost, which is conducive to the control of the production cost of the whole vehicle. The second reinforcement part 5 has a good load-bearing capacity and an installation process that is easier to operate and implement than the first reinforcement part 4. While simplifying the installation process, the threshold beam assembly in this embodiment can have good structural strength and load-bearing capacity.

[0050] By arranging the first reinforcement part 4 below the A-pillar, the overall structural strength of the sill beam can be strengthened in the entire length direction of the sill beam. When the vehicle collides, the first reinforcement part 4 can collapse at the first time and absorb the impact energy, and then guide the impact force to the second reinforcement part 5. The second reinforcement part 5 arranged behind the first reinforcement part 4 can further resist the impact force generated by the collision, reduce the intrusion of the impact energy into the interior of the vehicle passenger compartment, ensure the integrity of the vehicle body after the collision, and improve the safety of the passengers.

[0051] Based on the above design concept, specifically, in this embodiment, refer to Figure 1 and Figure 2 The sill beam outer panel 2 and the sill beam inner panel 3 can be a sheet metal structure formed by a metal sheet through sheet metal stamping. The sill beam outer panel 2 and the sill beam inner panel 3 are welded to form a sheet metal structure with a cavity below the A-pillar of the vehicle. The cavity formed by the sill beam outer panel 2 and the sill beam inner panel 3 is the sill beam cavity. The sill beam cavity is long and is arranged along the length direction of the vehicle body. The first reinforcement part 4 and the second reinforcement part 5 are both fixedly installed in the sill beam cavity. Among them, the first reinforcement part 4 is fixedly installed in the sill beam cavity at a position below the A-pillar of the vehicle, and the second reinforcement part 5 is located behind the first reinforcement part 4 and is arranged along the length direction parallel to the sill beam cavity.

[0052] By adopting the above structure, the sill beam outer panel 2 and the sill beam inner panel 3 can form a sheet metal structure with a cavity which has a relatively small overall weight and sufficiently high structural strength. The sill beam cavity 1 formed by the sill beam outer panel 2 and the sill beam inner panel 3 plays a role in limiting and supporting the installation of the first reinforcement part 4 and the second reinforcement part 5.

[0053] Reference Figure 2 and Figure 3, based on the purpose of improving the crushing energy absorption effect of the threshold beam assembly, meeting the lightweight design requirements of the whole vehicle, and controlling the threshold beam assembly and the overall cost of the vehicle, in this embodiment, the first reinforcement part 4 includes a reinforcement skeleton 401 and a thermal expansion adhesive 402. Among them, the reinforcement skeleton 401 can be a composite skeleton with bolt holes and limit holes opened along the width direction of the vehicle body. The reinforcement skeleton 401 can be made of an organic material (such as PA66+GF35 material) composed of nylon and glass fiber in a certain proportion by injection molding. The local thickness range of the reinforcement skeleton 401 is between 2mm and 4mm, and the specific thickness of the reinforcement skeleton 401 can be determined by the safety performance requirements and the baking simulation analysis results.

[0054] The surface of the reinforcement frame 401 is coated with a thermal expansion adhesive 402. The thermal expansion adhesive 402 can be made of a foaming material (such as epoxy resin, foaming agent, curing agent, special additives, etc.). The thermal expansion adhesive 402 can foam and expand during the coating baking process (140°C ± 2°C, 20min), and the foaming rate is 150% to 350%. After foaming, the thermal expansion adhesive 402 can bond the reinforcement frame 401 to the threshold beam inner plate 3 or the threshold beam outer plate 2 to form a hybrid structure with good mechanical strength.

[0055] In order to ensure the bonding effect of the thermal expansion adhesive 402, the distance between the reinforcing frame 401 and the threshold beam outer plate 2 or the threshold beam inner plate 3 is greater than or equal to 3mm. Before the thermal expansion adhesive 402 is heated and foamed, its own coating thickness ranges from 2mm to 4mm, and the gap between itself and the threshold beam outer plate 2 or the threshold beam inner plate 3 and other sheet metal structures is 3mm.

[0056] By limiting the thickness of the reinforcing frame 401 and the distance between the reinforcing frame 401 and the threshold beam outer plate 2 or the threshold beam inner plate 3, the thermal expansion adhesive 402 can have better bonding reliability while ensuring that the reinforcing frame 401 has sufficient mechanical strength and bearing capacity.

[0057] Reference Figure 2 and Figure 3 In order to limit the position of the first reinforcement part 4 before the thermal expansion adhesive 402 foams, a first connecting member 403 and a limiting member 404 are also installed on the first reinforcement part 4. In this embodiment, the first connecting member 403 can be a snap fastener. The snap fastener is installed in a bolt hole opened along the width direction of the vehicle body on the reinforcement frame 401. In order to further improve the fixing effect, the snap fastener is arranged as two evenly distributed along the length direction of the reinforcement frame 401, and the arrangement directions of the two snap fasteners are opposite. The limiting member 404 can be a stud screw. The limiting member 404 is inserted into the limiting hole of the reinforcement frame 401, and cooperates with the first connecting member 403 to achieve the limitation between the first reinforcement part 4 and the sill beam outer panel 2.

[0058] By setting the first connecting member 403 as a standard part such as a snap fastener, the processing cost can be reduced, and the processing, disassembly and assembly are relatively convenient. By arranging a limiting member 404 between the reinforcing skeleton 401 and the threshold beam sheet metal structure, it is convenient to quickly find the installation position of the reinforcing skeleton 401 in the cavity 1 of the threshold beam during the installation process, which is beneficial to improving the assembly accuracy and assembly efficiency.

[0059] Referring to Figure 2 and Figure 4 , in order to improve the structural strength and load-bearing capacity of the present application and simplify the installation process and steps, in this embodiment, the second reinforcing part 5 can be made of an aluminum alloy hollow profile. The inner side of the second reinforcing part 5 has a main cavity parallel to the length direction of the cavity 1 of the threshold beam. A plurality of partition plates 503 are further arranged on the inner side of the second reinforcing part 5, and the main cavity is divided into a plurality of sub-cavities due to the arrangement of the partition plates 503. Each of the sub-cavities is parallel to the length direction of the cavity 1 of the threshold beam and penetrates through the second reinforcing part 5. The second reinforcing part 5 is configured as a hollow aluminum alloy profile with a cross-section of a "mesh" shape plus diagonal braces due to the arrangement of the partition plates 503. In order to achieve a balance between the manufacturing cost and the structural strength, the thickness of the aluminum alloy profile forming the surface of the second reinforcing part 5 is 2.7 mm, and the thickness of the aluminum alloy profile of the partition plate 503 forming the second reinforcing part 5 is 2.5 mm.

[0060] Referring to Figure 2 and Figure 4 , in order to fix the second reinforcing part 5 in the cavity 1 of the threshold beam, a plurality of second connecting members 501 are arranged on the second reinforcing part 5 along the width direction of the vehicle body. The second connecting member 501 can be a bolt with a gasket, and the second connecting member 501 penetrates through the second reinforcing part 5 and the inner panel 3 of the threshold beam. The second connecting members 501 are configured to be uniformly distributed along the length direction of the cavity 1 of the threshold beam. In this embodiment, the number of the second connecting members 501 is 5. In order to improve the fastening effect of the second connecting member 501 on the second reinforcing part 5, the distribution positions of the second connecting members 501 on the second reinforcing part 5 are arranged in a staggered manner along the length direction of the cavity 1 of the threshold beam, so that the connecting lines of the distribution points of the second connecting members 501 are distributed in a "W" shape or a broken line shape.

[0061] Referring to Figure 2 and Figure 4In order to improve the fixing effect of the second reinforcement part 5 in the sill beam cavity 1, structural glue is applied between the second reinforcement part 5 and the sill beam inner plate 3 to assist in fixing. In order to enable the structural glue to achieve a better bonding effect, a glue groove 502 is provided on the side of the second reinforcement part 5 facing the sill beam inner plate 3. The glue groove 502 can be a long groove with a rectangular cross-section that is opened along a direction parallel to the length of the second reinforcement part 5. The glue groove 502 plays a role in keeping the structural glue in position, which can prevent the overflow of the structural glue and improve the bonding effect of the structural glue. In addition, the opening of the glue groove 502 can reduce the amount of aluminum alloy material used and reduce the overall weight of the second reinforcement part 5.

[0062] Reference Figure 2 and Figure 4 In order to ensure the supporting effect of the second reinforcing part 5 on the sill beam assembly structure, it is necessary to limit the installation position of the second reinforcing part 5 inside the sill beam cavity 1. In this embodiment, the gap between the upper surface of the second reinforcing part 5 and the top of the sill beam cavity 1 is 5 mm, the gap between the lower surface of the second reinforcing part 5 and the bottom of the sill beam cavity 1 is 5 mm, and the gap between the outer side surface of the second reinforcing part 5, that is, the side of the second reinforcing part 5 away from the sill beam inner plate 3 and the outer side wall of the sill beam cavity 1 is 5 mm.

[0063] Reference Figure 2 In order to leave enough space for the collapse and deformation of the first reinforcement part 4 after a collision, a 5mm-10mm installation interval is set between the first reinforcement part 4 and the second reinforcement part 5. The installation interval can also prevent the first reinforcement part 4 and the second reinforcement part 5 from colliding and causing abnormal noise under normal conditions.

[0064] Embodiment 2

[0065] This embodiment relates to a vehicle, including the sill beam assembly as described in the first embodiment.

[0066] The vehicle in this embodiment, by adopting the sill beam assembly of the first embodiment, can obtain better vehicle body strength, lighter vehicle weight, lower production and assembly costs, easier cost control, and better comprehensive performance.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A threshold beam assembly, characterized in that: It comprises a threshold beam outer plate (2) and a threshold beam inner plate (3) which surround and form a threshold beam cavity (1), and a first reinforcement part (4) and a second reinforcement part (5) which are arranged in the threshold beam cavity (1); The first reinforcement part (4) is located below the A-pillar of the vehicle and comprises a reinforcement frame (401) and a heat expansion adhesive (402) arranged on the reinforcement frame (401), wherein the heat expansion adhesive (402) is capable of connecting the sill beam outer plate (2) and the sill beam inner plate (3) when expanded by heat; The second reinforcement portion (5) is arranged behind the first reinforcement portion (4), and the second reinforcement portion (5) extends along the length direction of the door sill beam cavity (1).

2. The threshold beam assembly according to claim 1, characterized in that: The reinforcing frame (401) and the sill beam outer plate (2) are connected via a first connecting member (403); A limiting member (404) is provided between the reinforcing frame (401) and the sill beam outer plate (2), and the limiting member (404) is used to limit the installation position of the first reinforcing portion (4) on the sill beam outer plate (2).

3. The threshold beam assembly according to claim 2, characterized in that: The thickness of the reinforcing frame (401) is 2 mm to 4 mm, and the distance between the reinforcing frame (401) and the threshold beam outer plate (2) or the threshold beam inner plate (3) is greater than or equal to 3 mm; The thickness of the heat expansion adhesive (402) before thermal expansion is 2 mm to 4 mm, and the distance between the heat expansion adhesive (402) and the threshold beam outer plate (2) or the threshold beam inner plate (3) before thermal expansion is 3 mm.

4. The door sill beam assembly according to claim 1, characterized in that: The second reinforcement portion (5) is connected to the sill beam inner plate (3) via a plurality of second connecting members (501); A glue coating groove (502) is provided on one side of the second reinforcement portion (5) facing the sill beam inner plate (3), and the second reinforcement portion (5) can also be connected to the sill beam inner plate (3) by means of adhesive provided in the glue coating groove (502).

5. The door sill beam assembly according to claim 4, characterized in that: The second connecting member (501) is provided on the upper side and the lower side of the second reinforcement portion (5), and the second connecting member (501) on the upper side and the second connecting member (501) on the lower side are arranged alternately in the length direction of the door sill beam cavity (1).

6. The threshold beam assembly according to claim 1, characterized in that: A main cavity is provided in the second reinforcement portion (5), and a partition (503) is provided in the main cavity to divide the main cavity into a plurality of sub-cavities, each of which passes through the second reinforcement portion (5) along the length direction of the sill beam cavity (1).

7. The threshold beam assembly according to claim 1, characterized in that: The gap between the upper surface of the second reinforcing portion (5) and the top wall of the sill beam cavity (1) is greater than or equal to 5 mm, the gap between the lower surface of the second reinforcing portion (5) and the bottom wall of the sill beam cavity (1) is greater than or equal to 5 mm, and the gap between the outer side surface of the second reinforcing portion (5) and the outer side wall of the sill beam cavity (1) is greater than or equal to 5 mm.

8. The door sill beam assembly according to claim 1, characterized in that: The second reinforcement part (5) is made of aluminum alloy.

9. The sill beam assembly according to any one of claims 1 to 8, characterized in that: The distance between the first reinforcement part (4) and the second reinforcement part (5) in the two length directions of the door sill is 5 mm-10 mm.

10. A vehicle, characterized in that: The vehicle is provided with a sill beam assembly as claimed in any one of claims 1 to 9.

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