Threshold beam, B-pillar-free vehicle door structure and vehicle

Abstract

The utility model provides a doorsill beam, a B-pillar-free vehicle door structure and a vehicle, the doorsill beam comprises a first plate and a second plate, and the first plate and the second plate are bent and connected to form an assembly space; the assembling space is provided with a first assembling area and a second assembling area in the length direction of the first plate or the second plate, the first plate is provided with a first mounting position and a second mounting position, the first mounting position is located in the first assembling area, the second mounting position is located in the second assembling area, and the first assembling area is used for assembling a front swing arm assembly; the second assembling area is used for installing a rear swing arm assembly; the second plate is provided with an assembling position which can be fixedly connected with a floor. The threshold beam is fixedly connected with the floor of the vehicle through the second plate, and the front swing arm assembly and the rear swing arm assembly are fixed and supported through the first plate, so that double-door swing of the vehicle without the B column is achieved; the front swing arm assembly and the rear swing arm assembly do not interfere with each other in the moving process, and the second plate can isolate the front swing arm assembly and the rear swing arm assembly from the battery.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to a sill beam, a door structure without a B-pillar and a vehicle. Background Art

[0002] With the improvement of people's living standards, automobiles have been widely used as a daily means of transportation in life, and people are increasingly pursuing intelligence and comfort. The traditional door opening methods of automobiles usually include standard hinge opening, scissor doors, gull-wing doors, and double-leaf doors. No matter which door opening method, due to the existence of the B-pillar of the automobile, it will cause inconvenience for passengers when getting on and off the vehicle.

[0003] The vehicle without a B-pillar has the advantages of a more spacious riding space and fewer blind spots on the side, making the vehicle more convenient to use and showing a rising trend. However, the existing sill structure cannot be adapted to the vehicle without a B-pillar and cannot realize the swing of the double-leaf doors of the vehicle without a B-pillar. Summary of the Utility Model

[0004] In view of this, in order to solve the above problems, the utility model provides a sill beam, a door structure without a B-pillar and a vehicle to realize the double-leaf door function of the vehicle without a B-pillar.

[0005] The utility model first provides a sill beam for a vehicle without a B-pillar, including: a first plate and a second plate, the first plate and the second plate are bent and connected to form an assembly space; along the length direction of the first plate or the second plate, the assembly space has a first assembly area and a second assembly area, the first plate is provided with a first installation position and a second installation position, the first installation position is located in the first assembly area, the second installation position is located in the second assembly area, the first assembly area is used for installing a front swing arm assembly, and the second assembly area is used for installing a rear swing arm assembly; the second plate is provided with an assembly position, and the assembly position can be fixedly connected to the floor.

[0006] In the above sill beam, the sill beam is fixedly connected to the floor of the vehicle through the assembly position of the second plate, and the front swing arm assembly and the rear swing arm assembly are respectively fixed and supported through the first installation position and the second installation position of the first plate. The front swing arm assembly can realize the forward swing opening of the front door, and the rear swing arm assembly can realize the backward swing opening of the rear door to realize the swing of the double-leaf doors of the vehicle without a B-pillar; the front swing arm assembly and the rear swing arm assembly do not interfere with each other during the movement process, and the second plate can isolate the front swing arm assembly and the rear swing arm assembly from the battery installed at the bottom of the floor, thereby avoiding the collision between the front swing arm assembly and the rear swing arm assembly and the battery during the movement process to ensure the use safety.

[0007] In one embodiment, a first avoidance hole and a second avoidance hole are further provided on the second plate. The first avoidance hole is close to the first assembly area, and the second avoidance hole is close to the second assembly area.

[0008] With such an arrangement, the first avoidance hole is used to fix and support the front door lock assembly, and the second avoidance hole is used to fix and support the rear door lock assembly. The first avoidance hole and the second avoidance hole can reduce the space occupied by the front door lock assembly and the rear door lock assembly in the assembly space.

[0009] In one embodiment, the assembly position is a through hole, and the through holes are arranged at intervals along the length direction of the second plate.

[0010] With such an arrangement, the through holes arranged at intervals along the length direction of the second plate provide multiple support points between the sill beam and the floor, so as to ensure the stability and reliability of the connection between the sill beam and the floor.

[0011] In one embodiment, the first installation position includes two first grooves arranged at intervals. The two first grooves are arranged at intervals along the length direction of the first plate, and each first groove is located on the side of the first plate away from the second plate.

[0012] With such an arrangement, the first groove is used to install the front swing arm assembly. The first groove located on the side of the first plate away from the second plate can facilitate the machining of the first groove and also facilitate the installation of the front swing arm assembly to the first groove.

[0013] In one embodiment, the second installation position includes two second grooves arranged at intervals. The two second grooves are arranged at intervals along the length direction of the first plate, and each second groove is located on the side of the first plate away from the second plate.

[0014] With such an arrangement, the second groove is used to install the rear swing arm assembly. The second groove located on the side of the first plate away from the second plate can facilitate the machining of the second groove and also facilitate the installation of the rear swing arm assembly to the second groove.

[0015] In one embodiment, a third plate is further included. The third plate and the first plate are respectively fixedly connected to the top end and the bottom end of the second plate and enclose the assembly space.

[0016] With such an arrangement, the third plate can prevent the front swing arm assembly and the rear swing arm assembly from being exposed, thereby protecting the front swing arm assembly and the rear swing arm assembly and ensuring the regular appearance of the vehicle.

[0017] The present application also provides a pillarless door structure, including: a front door assembly, including a front door and a front swing arm assembly connected to the front door; a rear door assembly, including a rear door and a rear swing arm assembly connected to the rear door; and the threshold beam, wherein the front swing arm assembly is movably installed at the first installation position; the rear swing arm assembly is movably installed at the second installation position.

[0018] With such a setting, it is possible to achieve the opposed-door swing of the front door assembly and the rear door assembly of the pillarless door structure, and the front door assembly and the rear door assembly do not interfere with each other during the movement process.

[0019] In one embodiment, the front swing arm assembly includes a first driving member and a front swing arm connected to the first driving member; the first installation position includes two first grooves arranged at intervals, and the two first grooves are arranged at intervals along the length direction of the first plate, and each first groove is located on the side of the first plate away from the second plate, the first driving member is installed at the first groove near the end of the first plate, and the front swing arm is installed at the other first groove.

[0020] With such a setting, the first driving member can drive the front swing arm to drive the front door to swing forward to open or swing backward to close.

[0021] In one embodiment, the rear swing arm assembly includes a second driving member and a rear swing arm connected to the second driving member; the second installation position includes two second grooves arranged at intervals, and the two second grooves are arranged at intervals along the length direction of the first plate, and each second groove is located on the side of the first plate away from the second plate, the second driving member is installed at the second groove near the end of the first plate, and the rear swing arm is installed at the other second groove.

[0022] With such a setting, the second driving member can drive the rear swing arm to drive the rear door to swing backward to open or swing forward to close.

[0023] The present application also provides a vehicle, including the pillarless door structure.

[0024] With such a setting, the vehicle can achieve no B-pillar, so that the rear passengers have more usable space, which is convenient for the rear passengers to get on and off or carry large items. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a threshold beam provided by the present utility model;

[0026] Figure 2 is Figure 1 a schematic structural diagram of the threshold beam combined with the swing arm assembly in

[0027] Figure 3 is Figure 1 a schematic structural view of the middle sill beam and the floor assembly.

[0028] Reference numerals: 100, sill beam; 10, first plate; 11, first mounting position; 111, first groove; 12, second mounting position; 121, second groove; 20, second plate; 21, assembly position; 22, first avoidance hole; 23, second avoidance hole; 30, assembly space; 31, first assembly area; 32, second assembly area; 40, fourth plate; 200, front swing arm assembly; 201, first driving member; 202, front swing arm; 203, first assembly seat; 300, rear swing arm assembly; 301, second driving member; 302, rear swing arm; 303, second assembly seat; 400, floor; 500, front door lock assembly; 600, rear door lock assembly. Detailed embodiments

[0029] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following detailed description of the specific embodiments of the present utility model will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model 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 thus should not be construed as a limitation of the present utility model.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0035] The conventional door opening methods of cars usually include standard hinge door opening, scissor doors, gull-wing doors and double-leaf doors, etc. No matter which door opening method, due to the existence of the B-pillar of the car, it will cause many inconveniences for the rear passengers when getting on and off the car or carrying large items.

[0036] To solve the above problems, some existing cars have started to cancel the B-pillar to obtain a more spacious riding space. However, the existing sill structure cannot be adapted to the B-pillarless vehicle model and cannot realize the swing of the double-leaf doors of the B-pillarless vehicle model.

[0037] As Figures 1 to 3 shown, the present application first provides a sill beam 100, which is applied to a vehicle with a B-pillarless vehicle model, and its purpose is to solve the problem that the rear passengers of the vehicle with a B-pillarless vehicle model have more usable space. The sill beam 100 can cooperate with the existing B-pillarless vehicle model and realize the swing structure of the double-leaf doors of the B-pillarless vehicle model.

[0038] As Figures 1 to 3As shown, specifically, the sill beam 100 includes a first plate 10 and a second plate 20, and the first plate 10 and the second plate 20 are bent and connected to form an assembly space 30; along the length direction of the first plate 10 or the second plate 20, that is, the X direction shown in the figure, the assembly space 30 has a first assembly area 31 and a second assembly area 32. The first plate 10 is provided with a first installation position 11 and a second installation position 12. The first installation position 11 is located in the first assembly area 31, and the second installation position 12 is located in the second assembly area 32. The first assembly area 31 is used for installing the front swing arm assembly 200, and the second assembly area 32 is used for installing the rear swing arm assembly 300; the second plate 20 is provided with an assembly position 21, and the assembly position 21 can be fixedly connected to the floor 400.

[0039] In the sill beam 100 provided by the embodiment of the present invention, the sill beam 100 is fixedly connected to the floor 400 of the vehicle through the assembly position 21 of the second plate 20, and the front swing arm assembly 200 and the rear swing arm assembly 300 are respectively fixed and supported through the first installation position 11 and the second installation position 12 of the first plate 10. The front swing arm assembly 200 can swing the front door (not shown in the figure) forward to open, and the rear swing arm assembly 300 can swing the rear door (not shown in the figure) backward to open, so as to realize the swing of the opposed doors of the vehicle without a B-pillar; since the front swing arm assembly 200 and the rear swing arm assembly 300 are respectively installed in the first assembly area 31 and the second assembly area 32, therefore, the front swing arm assembly 200 and the rear swing arm assembly 300 do not interfere with each other during the movement process, and the second plate 20 can isolate the front swing arm assembly 200 and the rear swing arm assembly 300 from the battery installed at the bottom of the floor 400, so as to further avoid the collision between the front swing arm assembly 200 and the rear swing arm assembly 300 and the battery during the movement process, so as to ensure the use safety.

[0040] As Figure 1 and Figure 3As shown, since the vehicle is a B-pillarless model, the front door lock assembly 500 and the rear door lock assembly 600 of the vehicle also need to be installed on the sill beam 100. The second plate 20 is further provided with a first avoidance hole 22 and a second avoidance hole 23. The first avoidance hole 22 is close to the first assembly area 31, and the second avoidance hole 23 is close to the second assembly area 32. The first avoidance hole 22 is used to fix and support the front door lock assembly 500. When the front swing arm assembly 200 controls the front door to swing and close, the front door can cooperate with the front door lock assembly 500 to be locked. The second avoidance hole 23 is used to fix and support the rear door lock assembly 600. When the rear swing arm assembly 300 controls the rear door to swing and close, the rear door can cooperate with the rear door lock assembly 600 to be locked. The front door lock assembly 500 and the rear door lock assembly 600 can be arranged on the side surface of the second plate 20 facing away from the assembly space 30, and respectively extend into the assembly space 30 through the first avoidance hole 22 and the second avoidance hole 23, so as to reduce the space occupied by the front door lock assembly 500 and the rear door lock assembly 600 in the assembly space 30, reduce the overall volume of the sill beam 100, and also facilitate the electrical connection between the front door lock assembly 500 and the rear door lock assembly 600 and the control device of the vehicle.

[0041] As Figures 1 to 3 shown, in one embodiment, the assembly position 21 is a through hole, and the through holes are arranged at intervals along the length direction of the second plate 20. Specifically, fasteners such as bolts and nuts can be used to fix the sill beam 100 and the floor 400 at the through holes. During the assembly process, the bolt can be first passed through the floor 400 and the through hole, and then the nut is threadedly fixed to the bolt. The multiple through holes arranged at intervals along the length direction of the second plate 20 provide multiple support points between the sill beam 100 and the floor 400, so as to ensure the stability and reliability of the connection between the sill beam 100 and the floor 400, and also ensure the stability and reliability of the sill beam 100 in supporting the front swing arm assembly 200 and the rear swing arm assembly 300. Among them, the number of through holes can be eight as shown in the figure, and the eight through holes are arranged at intervals along the length direction of the second plate 20, or they can be grouped in pairs of two and arranged at intervals along the length direction of the second plate 20; alternatively, the number of through holes can also be two, three, four or more. Of course, in other embodiments, the sill beam 100 and the floor 400 can also be fixedly connected by other means such as welding at the assembly position 21, as long as the stability and reliability of the connection between the sill beam 100 and the floor 400 can be ensured. The embodiments of the present invention do not make specific limitations here.

[0042] As Figure 2As shown, the first mounting position 11 includes two first grooves 111 arranged at intervals. The two first grooves 111 are arranged at intervals along the length direction of the first plate 10, and each first groove 111 is located on the side of the first plate 10 away from the second plate 20. The two first grooves 111 are respectively used for mounting the first driving member 201 and the front swing arm 202 of the front swing arm assembly 200. The fact that the first groove 111 is located on the side of the first plate 10 away from the second plate 20 can facilitate the machining of the first groove 111 and also facilitate the installation of the first driving member 201 and the front swing arm 202 at the first groove 111. Specifically, the front swing arm assembly 200 further includes two first mounting seats 203. The first driving member 201 is mounted at one of the first grooves 111 through one of the first mounting seats 203, and the front swing arm 202 is mounted at the other first groove 111 through the other first mounting seat 203. The first driving member 201 can drive the front swing arm 202 to drive the front door to swing open or closed, and the first mounting seat 203 can ensure the stability and reliability of the connection between the first driving member 201 and the front swing arm 202 and the first plate 10.

[0043] As Figure 2 shown, the second mounting position 12 includes two second grooves 121 arranged at intervals. The two second grooves 121 are arranged at intervals along the length direction of the first plate 10, and each second groove 121 is located on the side of the first plate 10 away from the second plate 20. The two second grooves 121 are respectively used for mounting the second driving member 301 and the rear swing arm 302 of the rear swing arm assembly 300. The fact that the second groove 121 is located on the side of the first plate 10 away from the second plate 20 can facilitate the machining of the second groove 121 and also facilitate the installation of the second driving member 301 and the rear swing arm 302 at the second groove 121. Specifically, the rear swing arm assembly 300 further includes two second mounting seats 303. The second driving member 301 is mounted at one of the second grooves 121 through one of the second mounting seats 303, and the rear swing arm 302 is mounted at the other second groove 121 through the other second mounting seat 303. The second driving member 301 can drive the rear swing arm 302 to drive the rear door to swing open or closed, and the second mounting seat 303 can ensure the stability and reliability of the connection between the second driving member 301 and the rear swing arm 302 and the first plate 10.

[0044] It should be noted that both the front swing arm 202 and the rear swing arm 302 are existing door swing arm structures, so the specific structures of the front swing arm 202 and the rear swing arm 302 will not be specifically described here.

[0045] Further, the sill beam 100 further includes a third plate (not shown in the figure). The third plate and the first plate 10 are respectively fixedly connected to the top end and the bottom end of the second plate 20 and enclose an assembly space 30. The first plate 10, the second plate 20, and the third plate enclose a U-shaped structure. The opening of the U-shaped structure faces away from the floor 400, so that the front swing arm 202 can be connected to the front door and drive the front door to swing open or closed, and the rear swing arm 302 can be connected to the rear door and drive the rear door to swing open or closed. The third plate covers the top of the front swing arm assembly 200 and the rear swing arm assembly 300, which can prevent the front swing arm assembly 200 and the rear swing arm assembly 300 from being exposed, thereby protecting the front swing arm assembly 200 and the rear swing arm assembly 300 and ensuring the regular appearance of the vehicle.

[0046] As Figure 1 shown, the sill beam 100 further includes two fourth plates 40. The two fourth plates 40 are respectively arranged at both ends of the first plate 10 along the length direction, and each fourth plate 40 is fixedly connected to the first plate 10, the second plate 20, and the third plate. The first plate 10, the second plate 20, the third plate, and the two fourth plates 40 enclose the assembly space 30. The fourth plate 40 can also protect the front swing arm assembly 200 and the rear swing arm assembly 300 and ensure the regular appearance of the vehicle.

[0047] As Figures 2 to 3 shown, an embodiment of the present invention further provides a B-pillarless door structure, including a front door assembly, a rear door assembly, and the above-mentioned sill beam 100, wherein: the front door assembly includes a front door and a front swing arm assembly 200 connected to the front door; the rear door assembly includes a rear door and a rear swing arm assembly 300 connected to the rear door; the front swing arm assembly 200 is movably installed at the first installation position 11; the rear swing arm assembly 300 is movably installed at the second installation position 12. The front swing arm assembly 200 is installed at the first installation position 11 and can move within the first assembly area 31 to drive the front door to swing open or closed. The rear swing arm assembly 300 is installed at the second installation position 12 and can move within the second assembly area 32 to drive the rear door to swing open or closed. Thereby, the opposite-door swing of the front door assembly and the rear door assembly of the B-pillarless door structure can be realized, and the front door assembly and the rear door assembly do not interfere with each other during the movement process.

[0048] As Figure 2As shown, the front swing arm assembly 200 includes a first driving member 201 and a front swing arm 202 connected to the first driving member 201; the first mounting position 11 includes two first grooves 111 arranged at intervals, and the two first grooves 111 are arranged at intervals along the length direction of the first plate 10, and each first groove 111 is located on the side of the first plate 10 away from the second plate 20. In one implementation, the front swing arm assembly 200 further includes two first mounting seats 203. The first driving member 201 is mounted at the first groove 111 near the end of the first plate 10 through one of the first mounting seats 203, and the front swing arm 202 is mounted at the other first groove 111 through the other first mounting seat 203, so that the first driving member 201 can drive the front swing arm 202 to drive the front door to swing forward to open or swing backward to close. The first mounting seat 203 can ensure the stability and reliability of the connection between the first driving member 201 and the front swing arm 202 and the first plate 10. Setting the first driving member 201 at a position near the end of the first plate 10 can prevent the height of the first driving member 201 from being too high and affecting the passengers getting on and off the vehicle. Of course, in other implementations, the front swing arm 202 can also be mounted at the first groove 111 near the end of the first plate 10 according to the structure and movement mode of the front swing arm 202, and the first driving member 201 can be mounted at the other first groove 111, as long as the first driving member 201 can drive the front swing arm 202 to drive the front door to swing forward to open or swing backward to close.

[0049] As Figure 2As shown in the figure, the rear swing arm assembly 300 includes a second driving member 301 and a rear swing arm 302 connected to the second driving member 301; the second mounting position 12 includes two second grooves 121 arranged at intervals, and the two second grooves 121 are arranged at intervals along the length direction of the first plate 10, and each second groove 121 is located on the side of the first plate 10 away from the second plate 20. In one embodiment, the rear swing arm assembly 300 further includes two second mounting seats 303. The second driving member 301 is mounted on the second groove 121 near the end of the first plate 10 through one of the second mounting seats 303, and the rear swing arm 302 is mounted on the other second groove 121 through the other second mounting seat 303, so that the second driving member 301 can drive the rear swing arm 302 to drive the rear door to swing backward to open or swing forward to close. The second mounting seat 303 can ensure the stability and reliability of the connection between the second driving member 301 and the rear swing arm 302 and the first plate 10. Setting the second driving member 301 at a position near the end of the first plate 10 can avoid the excessive height of the second driving member 301 from affecting the getting on and off of passengers. Of course, in other embodiments, the rear swing arm 302 can also be mounted on the second groove 121 near the end of the first plate 10 according to the structure and movement mode of the rear swing arm 302, and the second driving member 301 can be mounted on the other second groove 121, as long as the second driving member 301 can drive the rear swing arm 302 to drive the front door to swing forward to open or swing backward to close.

[0050] Wherein, the first driving member 201 and the second driving member 301 can be driving motors, and the first driving member 201 and the second driving member 301 are electrically connected to the control device of the vehicle.

[0051] The embodiment of the present invention further provides a vehicle, including the above-mentioned door structure without a B-pillar. In this way, the vehicle can achieve no B-pillar, so that the rear passengers have more usable space, which is convenient for the rear passengers to get on and off or carry large items.

[0052] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0053] The above-mentioned embodiments only express several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A sill beam for a vehicle without a B-pillar, characterized in that, Comprising: A first plate (10) and a second plate (20), the first plate (10) and the second plate (20) are bent and connected to form an assembly space (30); Along the length direction of the first plate (10) or the second plate (20), the assembly space (30) has a first assembly area (31) and a second assembly area (32). The first plate (10) is provided with a first installation position (11) and a second installation position (12). The first installation position (11) is located in the first assembly area (31), and the second installation position (12) is located in the second assembly area (32). The first assembly area (31) is used for installing a front swing arm assembly (200), and the second assembly area (32) is used for installing a rear swing arm assembly (300); The second plate (20) is provided with an assembly position (21), and the assembly position (21) can be fixedly connected to the floor (400).

2. The sill beam according to claim 1, characterized in that, The second plate (20) is further provided with a first avoidance hole (22) and a second avoidance hole (23). The first avoidance hole (22) is close to the first assembly area (31), and the second avoidance hole (23) is close to the second assembly area (32).

3. The threshold beam according to claim 1, characterized in that, The assembly position (21) is a through hole, and the through holes are arranged at intervals along the length direction of the second plate (20).

4. The sill beam according to claim 1, characterized in that, The first installation position (11) includes two first grooves (111) arranged at intervals. The two first grooves (111) are arranged at intervals along the length direction of the first plate (10), and each first groove (111) is located on the side of the first plate (10) away from the second plate (20).

5. The threshold beam according to claim 1 or 4, characterized in that, The second installation position (12) includes two second grooves (121) arranged at intervals. The two second grooves (121) are arranged at intervals along the length direction of the first plate (10), and each second groove (121) is located on the side of the first plate (10) away from the second plate (20).

6. The sill beam according to claim 1, wherein It further includes a third plate. The third plate and the first plate (10) are respectively fixedly connected to the top end and the bottom end of the second plate (20) and enclose the assembly space (30).

7. A door structure without a B-pillar, characterized in that, Comprising: A front door assembly, including a front door and a front swing arm assembly (200) connected to the front door; A rear door assembly, including a rear door and a rear swing arm assembly (300) connected to the rear door; and The sill beam according to any one of claims 1 to 6, the front swing arm assembly (200) is movably installed in the first installation position (11); the rear swing arm assembly (300) is movably installed in the second installation position (12).

8. The door structure without a B-pillar according to claim 7, characterized in that, The front swing arm assembly (200) includes a first driving member (201) and a front swing arm (202) connected to the first driving member (201); The first installation position (11) includes two first grooves (111) arranged at intervals. The two first grooves (111) are arranged at intervals along the length direction of the first plate (10). Each first groove (111) is located on the side of the first plate (10) away from the second plate (20). The first driving member (201) is installed at the first groove (111) near the end of the first plate (10), and the front swing arm (202) is installed at the other first groove (111).

9. The door structure without a B-pillar according to claim 8, characterized in that, The rear swing arm assembly (300) includes a second driving member (301) and a rear swing arm (302) connected to the second driving member (301); The first installation position (11) includes two second grooves (121) arranged at intervals. The two second grooves (121) are arranged at intervals along the length direction of the first plate (10). Each second groove (121) is located on the side of the first plate (10) away from the second plate (20). The second driving member (301) is installed at the second groove (121) near the end of the first plate (10), and the rear swing arm (302) is installed at the other second groove (121).

10. A vehicle, characterized in that, Comprising the B-pillarless door structure according to any one of claims 7 to 9.

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