Sliding door vehicle body structure and vehicle

Abstract

The application discloses a sliding door vehicle body structure and a vehicle. The sliding door vehicle body structure comprises a lower guide rail, a side wall outer plate and a rocker. The rocker comprises a rocker outer plate and a rocker inner plate. The bottom of the rocker inner plate and the rocker outer plate are sealed and welded. The top of the lower guide rail is welded with the top of the rocker inner plate to form a sealing surface. The bottom of the lower guide rail is welded with the top of the rocker outer plate to form a sealing surface. The side wall outer plate is arranged outside the lower guide rail. A horizontal sliding groove is arranged on the position of the lower guide rail for the sliding of the sliding door. In the application, the rocker is formed by the rocker outer plate and the rocker inner plate through bottom welding. The lower guide rail, the rocker inner plate and the rocker outer plate form a firm connection of a double support, and a very strong closed force structure is formed.

Description

Technical Field

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

[0002] In existing commercial sliding door models, the lower guide rail structure is located under the floor and integrated into the vehicle frame assembly. This structure has the following problems: 1. The lower guide rail structure extends to the passenger compartment. Due to manufacturing limitations, the welded edges of the structure cannot be sealed with body sealant, resulting in poor waterproofing and sealing performance. 2. Due to the limitations of the sliding door's lower guide rail structure, the cross-section at the lower guide rail of the side panel is small, resulting in insufficient handling rigidity. It needs to be divided into three parts: front, middle, and rear. The investment in tooling (mold / clamp / inspection fixture) is high, and spot welding connections are required, resulting in poor manufacturing precision. 3. Due to the limitation of the sliding door's sealing surface, the sealing edge of the rubber strip under the B-pillar cannot move forward, resulting in a small opening angle for the sliding door; 4. Due to the need to avoid the sliding door wheel arm, the cross-section and rounded corners of columns B and C are small. The outer sill plate is not connected to columns B and C, the door frame structure is incomplete, and the structural rigidity is weak. Utility Model Content

[0003] This application proposes a sliding door body structure and vehicle, relating to the field of vehicle body technology. The lower guide rail structure of the sliding door is arranged below the sealing surface of the sliding door, which has good waterproof and sealing performance, and enables a larger opening degree of the sliding door.

[0004] In a first aspect, embodiments of this application provide a sliding door body structure, including a lower guide rail, a side panel, and a door sill; The threshold includes an outer threshold panel and an inner threshold panel, and the bottom of the inner threshold panel and the outer threshold panel are sealed and welded together. The top of the lower guide rail is welded to the top of the inner sill plate to form a sealing surface, and the bottom of the lower guide rail is welded to the top of the outer sill plate to form a sealing surface. The outer side panel is located on the outside of the lower guide rail, and the outer side panel is provided with a transverse groove for the sliding door to slide at the position of the lower guide rail.

[0005] In this embodiment, the sill is formed by welding an outer sill plate and an inner sill plate together at the bottom. The lower guide rail forms a robust "double-support" connection with the inner and outer sill plates, creating a very strong closed-loop load-bearing structure.

[0006] Optionally, in the sliding door body structure according to the embodiments of this application, the upper side of the transverse sliding groove is welded to the outer side of the welding surface of the lower guide rail and the inner sill plate.

[0007] Optionally, in the sliding door body structure according to the embodiments of this application, the lower side of the transverse sliding groove is welded to the outer side of the welding surface of the lower guide rail and the outer sill plate.

[0008] In this embodiment, the side panel and the lower body frame (sill + lower guide rail) are completely integrated into a single unit through welding on the upper and lower sides. The lower guide rail and the side panel form a closed box, which improves the bending and torsional stiffness to an unprecedented degree.

[0009] Optionally, according to the sliding door body structure described in the embodiments of this application, the bottom of the side outer panel is also welded to the outer side of the welding surface of the inner sill panel and the outer sill panel, and a cavity structure is formed between the bottom of the outer sill panel and the lower side of the transverse sliding groove.

[0010] In this embodiment, a stable foundation comparable to a "bridge" is provided for the sliding door, solving problems caused by deformation of the foundation structure (such as abnormal noise, vibration, and jamming). The huge box-shaped structure becomes an extremely robust component of the bottom of the vehicle's side panel, significantly improving the vehicle's torsional and bending stiffness, and enhancing handling and safety.

[0011] Optionally, the sliding door body structure according to the embodiments of this application further includes a rear floor and a rear beam extension. The rear floor overlaps the inner sill plate, the bottom of the rear beam extension is welded to the inner sill plate, and the top is welded to the rear floor. A cavity structure is formed between the inner sill plate, the rear floor, and the rear beam extension.

[0012] In this embodiment, the cavity structure formed by the rear beam extension is adjacent to the cavity at the aforementioned sill, together forming a complex multi-cavity structure. The multi-cavity structure is more stable than a single cavity and can serve as a sound insulation cavity or a damping cavity, effectively blocking and absorbing noise and vibration transmitted from the rear and bottom.

[0013] Optionally, in the sliding door body structure according to the embodiments of this application, one end of the lower guide rail extends to the lower cavity of the B-pillar and is connected to the B-pillar reinforcing plate.

[0014] Optionally, according to the sliding door body structure described in the embodiments of this application, the lower cavity of the B-pillar is shaped like the number eight, and has a large rounded corner transition design on the side facing the lower guide rail.

[0015] In this embodiment, the impact force is effectively guided from the door sill and lower guide rail to the B-pillar and dispersed upwards, preventing brittle tearing at the connection point and thus improving passive safety.

[0016] Optionally, in the sliding door body structure according to the embodiments of this application, the other end of the lower guide rail extends to the lower cavity of the C-pillar and is connected to the C-pillar reinforcing plate.

[0017] Optionally, according to the sliding door body structure described in the embodiments of this application, the lower cavity of the C-pillar is shaped like the number eight, and has a large rounded corner transition design on the side facing the lower guide rail.

[0018] In this embodiment, the loads and lateral impacts from the sliding door can now be efficiently diverted and transmitted to both the B-pillar and C-pillar simultaneously via the lower guide rail.

[0019] Secondly, this application also provides a vehicle including the sliding door body structure described in any of the above embodiments.

[0020] In this embodiment, the lower guide rail structure of the sliding door is arranged below the sealing surface of the sliding door, which provides good waterproof and sealing performance and enables a larger opening of the sliding door; the side panel is stamped as a whole, which reduces weight and cost and improves dimensional accuracy; the lower cavity of the B and C pillars has an "eight" shape design and large rounded corner transition, and the lower guide rail is connected to the B / C pillar reinforcement plate, so the door frame structure is complete and the torsional rigidity of the whole vehicle is increased by 10%. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of this application; Figure 2 A cross-sectional view of a sliding door vehicle body structure provided in an embodiment of this application; Figure 3 This is a schematic diagram of a sliding door vehicle body structure provided in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures: 1. Lower guide rail; 2. Side outer panel; 3. Door sill inner panel; 4. Rear floor; 5. Rear beam extension; 6. Door sill outer panel; 7. B-pillar lower cavity; 8. C-pillar lower cavity. Detailed Implementation

[0024] To better understand the technical solutions in this specification, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0025] It should be understood that the described embodiments are merely some, not all, of the embodiments in this specification. All other embodiments obtained by those skilled in the art based on the embodiments in this specification without inventive effort are within the scope of protection of this specification.

[0026] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this specification. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0027] In existing commercial sliding door models, the lower guide rail structure is located under the floor and integrated into the vehicle frame assembly. This structure has the following problems: 1. The lower guide rail structure extends to the passenger compartment. Due to manufacturing limitations, the welded edges of the structure cannot be sealed with body sealant, resulting in poor waterproofing and sealing performance. 2. Due to the limitations of the sliding door's lower guide rail structure, the cross-section at the lower guide rail of the side panel is small, resulting in insufficient handling rigidity. It needs to be divided into three parts: front, middle, and rear. The investment in tooling (mold / clamp / inspection fixture) is high, and spot welding connections are required, resulting in poor manufacturing precision. 3. Due to the limitation of the sliding door's sealing surface, the sealing edge of the rubber strip under the B-pillar cannot move forward, resulting in a small opening angle for the sliding door; 4. Due to the need to avoid the sliding door wheel arm, the cross-section and rounded corners of columns B and C are small. The outer sill plate is not connected to columns B and C, the door frame structure is incomplete, and the structural rigidity is weak.

[0028] In view of this, according to Figures 1 to 3 As shown, this application embodiment provides a sliding door body structure, including a lower guide rail 1, a side outer panel 2, and a threshold; The threshold includes an outer threshold plate 6 and an inner threshold plate 3, and the bottom of the inner threshold plate 3 and the outer threshold plate 6 are sealed and welded. The top of the lower guide rail 1 is welded to the top of the inner sill plate 3 to form a sealing surface, and the bottom of the lower guide rail 1 is welded to the top of the outer sill plate 6 to form a sealing surface. The outer side panel 2 is located on the outside of the lower guide rail 1, and the outer side panel 2 is provided with a transverse sliding groove for the sliding door to slide at the position of the lower guide rail 1.

[0029] In this embodiment, the door sill itself is a hollow structure, formed by welding the outer sill plate 6 (facing outwards) and the inner sill plate 3 (facing inwards) together at the bottom. The lower guide rail 1 forms a robust "double-support" connection with the inner sill plate 3 and the outer sill plate 6, creating a very strong closed-loop load-bearing structure. This structure can stably withstand the repeated loads and impacts from the frequent opening and closing of the sliding door, preventing the guide rail from loosening or deforming due to long-term use. It strengthens the overall rigidity of the vehicle body sidewall, contributing to improved vehicle handling and durability. The stable guide rail base ensures that the sliding door can always move smoothly and steadily, avoiding jamming. Furthermore, in this embodiment, the welded edges are all coated with vehicle body sealant, effectively preventing road surface water, rainwater, and dust from entering the vehicle body interior and sill cavity through the sliding groove and sill joint. This isolates water and air, greatly reducing the risk of electrochemical corrosion in the sill cavity (which easily accumulates moisture and salt) and the connection point of the lower guide rail 1, thus extending the vehicle body's lifespan. Furthermore, better sealing means less noise and wind noise enters the car, improving ride comfort.

[0030] The lower guide rail 1 is highly integrated with the vehicle sill structure, rather than being an added component. Compared to external guide rails, this design is more compact, lowers the vehicle floor height, and helps improve interior headroom or lower the vehicle's center of gravity. The sliding door's groove opening on the outer side panel 2 can be made more refined, resulting in smoother and more aesthetically pleasing side profiles. The sliding door's sealing surface is moved upwards, increasing the cross-section of the outer side panel 2 at this point, improving handling rigidity. The outer side panel 2 can be integrally molded, reducing tooling investment and costs while improving dimensional accuracy.

[0031] In some embodiments, the upper side of the transverse slide is welded to the outer side of the welding surface of the lower guide rail 1 and the inner sill plate 3. The lower side of the transverse slide is welded to the outer side of the welding surface of the lower guide rail 1 and the outer sill plate 6.

[0032] In this embodiment, the side panel 2 and the lower body frame (sill + lower guide rail 1) are completely integrated into a single unit through welding on the upper and lower sides. The lower guide rail 1 and the side panel 2 form a closed box, resulting in unprecedented improvement in bending and torsional rigidity. The rigidity and stability required for the sliding door operation reach the highest level, completely eliminating door vibration, abnormal noise, or jamming caused by deformation of the basic structure. The high-rigidity "door frame" greatly strengthens the side of the vehicle body, improving the overall handling and durability. In side collisions, this robust three-dimensional structure can effectively resist impact forces, distributing the force more evenly throughout the vehicle body and better protecting the passenger compartment. Furthermore, the upper and lower weld seams formed by the side panel 2 and the lower guide rail 1 themselves constitute two continuous sealing weld seams. Together with the sealing surface between the lower guide rail 1 and the sill, multiple sealing barriers are formed. Even if a small amount of moisture or dust attempts to intrude through the gaps in the side panel 2, it will be effectively blocked by the outermost weld seam. The sealing reliability is extremely high. This ensures that the internal cavity of the threshold and the connection point with the lower guide rail 1 are completely isolated from the outside world, fundamentally solving the corrosion risk of this type of structure.

[0033] In some embodiments, the bottom of the side panel 2 is also welded to the outer side of the welding surface of the inner sill plate 3 and the outer sill plate 6, and a cavity structure is formed between the bottom of the outer sill plate 6 and the lower side of the transverse groove.

[0034] In this embodiment, three welds connect the components into a complete closed-section beam. In engineering mechanics, the torsional and bending stiffness of a closed section (such as a box girder) is much greater than that of an open section. This provides a stable foundation for the sliding door, comparable to a "bridge," and solves problems caused by deformation of the foundation structure (such as abnormal noise, vibration, and jamming). The massive box-shaped structure becomes an extremely robust component of the bottom side panel of the vehicle body, significantly improving the torsional and bending stiffness of the entire vehicle, and enhancing handling and safety.

[0035] The bottom weld completely seals off the last path for water and dust to enter the door sill cavity and guide rail connection points from the bottom. The entire system is now completely encased in a metal shell. This achieves "full-coverage" protection for the internal cavity and critical connection points, preventing water from high-pressure water jets during car washes or mud splashes from the road from entering the core area. It also isolates the system from moisture and corrosive media, ensuring the highest standard of durability for the bottom of the vehicle side panel and the sliding door guide rail system.

[0036] The enclosed cavity structure itself is an excellent sound insulation and damping structure, which can effectively block road noise and tire noise from entering the vehicle, while also suppressing noise generated by panel vibration. When the vehicle is in motion, especially on bumpy roads and at high speeds, the quietness inside the vehicle is significantly improved, enhancing ride comfort.

[0037] In some embodiments, the system further includes a rear floor 4 and a rear beam extension 5, the rear floor 4 overlapping the inner sill plate 3, the bottom of the rear beam extension 5 being welded to the inner sill plate 3 and the top being welded to the rear floor 4, and a cavity structure being formed between the inner sill plate 3, the rear floor 4 and the rear beam extension 5.

[0038] In this embodiment, the rear beam extension 5 directly and smoothly transfers the forces from the rear body (rear floor 4, rear beam) to the sill-side panel assembly, ensuring a continuous and unified force flow path between the front and rear of the vehicle. This enhances the overall torsional and bending stiffness of the vehicle body, resulting in less deformation during cornering and bumpy driving. Loads from the sliding doors and rear wheel impacts can be quickly distributed throughout the vehicle body through this robust structure, preventing stress concentration. Rear impact energy can be effectively guided to the high-strength sill beam and dispersed forward through the rear beam extension 5, reducing deformation of the passenger compartment. Combined with the sill and side panel outer plates 2, it also effectively resists side intrusion, significantly improving the vehicle's passive safety and providing more comprehensive protection for occupants.

[0039] The cavity structure formed by the rear beam extension 5 is adjacent to the cavity at the aforementioned sill, together forming a complex multi-cavity structure. The multi-cavity structure is more stable than a single cavity and can serve as a sound insulation cavity or a damping cavity, effectively blocking and absorbing noise and vibration transmitted from the rear and bottom.

[0040] In some embodiments, one end of the lower guide rail 1 extends to the lower cavity 7 of the B-pillar and is connected to the B-pillar reinforcing plate. The lower cavity 7 of the B-pillar is V-shaped and has a large rounded corner transition design on one side facing the lower guide rail 1.

[0041] In this embodiment, the lower guide rail 1 is directly connected to the B-pillar reinforcement plate, meaning that all longitudinal (vehicle longitudinal direction) forces and vibrations generated by the sliding door can be directly and efficiently transmitted to the B-pillar, the core of the passenger compartment. This avoids the guide rail end becoming a weak point in rigidity and prevents weld cracking due to long-term impact. The B-pillar (vertical support), lower guide rail 1 (horizontal support), and sill (bottom support) together form an extremely stable three-dimensional frame, providing the most stable operating foundation for the sliding door to date. The "large rounded corner transition" eliminates sharp corners. Under stress, force lines flow along the shape like water; sharp corners cause force lines to become congested, stress to spike, and they are highly susceptible to becoming the origin of fatigue cracks. Large rounded corners allow force lines to transition smoothly and evenly to the B-pillar. This significantly reduces the risk of cracks forming at the lower end of the B-pillar, a critical connection point, under long-term vibration and impact loads, greatly improving the durability and reliability of the vehicle body structure. In side collisions, the embodiments of this application can effectively guide the impact force from the sill and lower guide rail 1 to the B-pillar and disperse it upwards, preventing brittle tearing of the structure at the connection point, thereby improving passive safety.

[0042] In some embodiments, the other end of the lower guide rail 1 extends to the lower cavity 8 of the C-pillar and connects to the C-pillar reinforcing plate. The lower cavity 8 of the C-pillar is V-shaped and features a large rounded corner transition design on one side facing the lower guide rail 1. The lower guide rail 1 is arranged at the lower end of the B-pillar and C-pillar cavities to increase the opening of the sliding door, such as... Figure 3 As shown in the figure, L is the overall length of the lower guide rail 1, which is the opening degree that the sliding door can achieve.

[0043] In this embodiment, loads from the sliding door and lateral impact forces can now be efficiently diverted and transmitted to both the B-pillar and C-pillar simultaneously via the lower guide rail 1. The force is distributed over a wider area, avoiding excessive stress at a single connection point. The average stress on each component is lower, significantly extending the fatigue life of the entire vehicle body structure. In side impacts, this complete force ring can extremely effectively transfer and absorb impact energy from the point of impact through the sill beam and guide rail to both the B-pillar and C-pillar.

[0044] Secondly, this application also provides a vehicle including the sliding door body structure described in any of the above embodiments.

[0045] The lower guide rail 1 of the sliding door is located below the sealing surface of the sliding door, which provides good waterproof and sealing performance and allows for a larger opening of the sliding door; the side outer panel 2 is stamped in one piece, reducing weight and cost and improving dimensional accuracy; the B-pillar lower cavity 7 and C-pillar lower cavity 8 have an "eight" shape design and large rounded corner transition, and the lower guide rail 1 is connected to the B / C pillar reinforcement plate, making the door frame structure complete and increasing the torsional rigidity of the whole vehicle by 10%.

[0046] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. A sliding door vehicle body structure, characterized in that, This includes the lower guide rail, side panels, and door sill; The threshold includes an outer threshold panel and an inner threshold panel, and the bottom of the inner threshold panel and the outer threshold panel are sealed and welded together. The top of the lower guide rail is welded to the top of the inner sill plate to form a sealing surface, and the bottom of the lower guide rail is welded to the top of the outer sill plate to form a sealing surface. The outer side panel is located on the outside of the lower guide rail, and the outer side panel is provided with a transverse groove for the sliding door to slide at the position of the lower guide rail.

2. The sliding door vehicle body structure according to claim 1, characterized in that, The upper side of the transverse slide is welded to the outer side of the welding surface of the lower guide rail and the inner sill plate.

3. The sliding door vehicle body structure according to claim 1, characterized in that, The lower side of the transverse slide is welded to the outer side of the welding surface of the lower guide rail and the outer sill plate.

4. The sliding door vehicle body structure according to claim 3, characterized in that, The bottom of the outer side panel is also welded to the outer side of the welding surface of the inner sill panel and the outer sill panel, and a cavity structure is formed between the bottom of the outer sill panel and the lower side of the transverse sliding groove.

5. The sliding door vehicle body structure according to claim 1, characterized in that, It also includes a rear floor and a rear beam extension, the rear floor overlapping the inner sill plate, the bottom of the rear beam extension being welded to the inner sill plate and the top being welded to the rear floor, and a cavity structure being formed between the inner sill plate, the rear floor and the rear beam extension.

6. The sliding door vehicle body structure according to claim 1, characterized in that, One end of the lower guide rail extends to the lower cavity of the B-pillar and is connected to the B-pillar reinforcing plate.

7. The sliding door vehicle body structure according to claim 6, characterized in that, The lower cavity of the B-pillar is shaped like the number eight, and features a large rounded corner transition design on the side facing the lower guide rail.

8. The sliding door vehicle body structure according to claim 6 or 7, characterized in that, The other end of the lower guide rail extends to the lower cavity of the C-pillar and is connected to the C-pillar reinforcing plate.

9. The sliding door vehicle body structure according to claim 8, characterized in that, The lower cavity of the C-pillar is shaped like the number eight, and has a large rounded corner transition design on the side facing the lower guide rail.

10. A vehicle, characterized in that, The sliding door body structure includes any one of claims 1 to 9.

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