Automobile door drainage structure

Abstract

This invention relates to a car door drainage structure that provides a good seal between the door trim panel and the car body sheet metal while ensuring smooth drainage of water accumulation in the side area. A door trim panel is connected to the outer side of the door outer panel. The length of the door trim panel is consistent with the X-direction, and its bottom edge extends to the bottom of the outer and inner door panels. A lower door strip is provided between the door trim panel and the bottom of the outer and inner door panels. The length of the lower door strip is consistent with the X-direction. The upper edge of the lower door strip is fixedly connected to the door trim panel, and the lower edge extends towards the side panel and seals against the side panel sealing strip. Drainage holes arranged in the Z-direction are provided on the lower door strip. Water flowing down from the outer door panel and door frame flows down through the drainage holes and exits the vehicle through the gap between the door trim panel and the lower door strip. Part of the water flows from the leakage holes in the outer door panel and is discharged through the drainage holes in the lower door strip; another part comes from the door frame and is guided by the lower door strip to also be discharged through the drainage holes.

Description

Technical Field

[0001] This invention relates to the field of automotive door technology, and more specifically to an automotive door drainage structure. Background Technology

[0002] With the development of the automotive industry, the requirements for the aesthetics and corrosion resistance of visible car surfaces are becoming increasingly stringent. Ordinary car door drainage channels are drainage holes drilled into the inner door panel, but this presents several unavoidable problems: 1. Exposed drainage holes are aesthetically unappealing and tend to yellow or blacken after prolonged use, leading to customer complaints; 2. Punching holes on the irregular surface of the inner door panel creates numerous burrs, making rusting a common complaint; 3. Without shielding the holes, high-speed wind noise can easily enter the vehicle through them.

[0003] To address the aforementioned problems, an invention application entitled "A Drainage Channel Structure for an Outer Door Panel" (application number: 202110299978.2) discloses the following technical solution: It includes an outer door panel, an inner door panel, and an outer door guard panel. A water outlet is provided near the lower edge of the outer door panel, and a clip mounting hole is provided near the upper right side of the outer door panel. A corresponding portion of the water outlet is provided at the lower part of the inner door panel. This corresponding portion of the water outlet corresponds to the water outlet on the outer door panel, forming an upper drainage channel. A clip mounting structure is provided on the upper right side of the outer door guard panel, and two baffles are provided in the middle of the lower edge of the outer door guard panel. The clip mounting structure of the outer door guard panel corresponds to the clip mounting hole on the outer door panel and is fixed by clips. A drainage channel is formed between the two baffles, and this drainage channel is correspondingly connected to the upper drainage channel. Because the outer door panel has two water deflectors, positioned on either side of the drainage hole with a small gap between them and the lower surface of the door panel, these deflectors block rainwater from flowing out of the drainage hole, causing it to flow downwards and not to the sides. This also prevents wind from entering the door cavity during high-speed driving, reducing wind noise. Furthermore, since the lower part of the door panel is flat, the drainage hole is formed using a punching process, which is simple and reliable, avoiding burrs on the edges of the drainage hole and reducing the risk of corrosion. The integrated structure also provides advantages such as concealed drainage channels and a good aesthetic appearance. As consumers have increasingly higher demands for vehicle styling, and considering the overall vehicle design, sealing, NVH performance, and appearance requirements, the door trim panel must reflect the matching mounting plate of the lower door sealing strip. With the side door trim panels becoming larger, the area of ​​the side door trim panel accumulates a lot of water. Because the Y-direction sealing strip matches the side panel with zero gap, the water in the side door area cannot drain, causing water quality problems. When the door is opened, a large amount of rainwater flows out, leading to complaints. Summary of the Invention

[0004] The purpose of this invention is to provide a car door drainage structure that provides a good seal between the door trim panel and the car body sheet metal while ensuring smooth drainage of water accumulation in the side area.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a car door drainage structure, comprising an outer door panel and an inner door panel with their lower plates attached to each other, a door decorative panel connected to the outer side of the outer door panel, the length of the door decorative panel being consistent with the X direction, characterized in that: the bottom edge of the door decorative panel extends to the bottom of the outer door panel and the inner door panel, a lower door strip is provided between the door decorative panel and the bottom of the outer door panel and the inner door panel, the length of the lower door strip is consistent with the X direction, the upper edge of the lower door strip is fixedly connected to the door decorative panel, the lower edge extends towards the side wall direction and is sealed and cooperates with the side wall sealing strip, and drainage holes arranged in the Z direction are opened on the lower door strip, the water flowing down from the outer door panel and the door frame flows down from the drainage holes and flows out of the car through the gap between the door decorative panel and the lower door strip.

[0006] In the above scheme, part of the water flow comes from the leakage hole on the outer panel of the door, and the other part comes from the door frame. The water from the leakage hole area on the outer panel of the door is discharged through the drainage hole on the lower panel of the door, and the water from the door frame is also discharged through the drainage hole guided by the lower panel of the door. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the overall structure of the car door and side panel.

[0008] Figure 2 Exploded view of the door trim panel and lower door slats;

[0009] Figure 3 , Figure 4 This is a cross-sectional view of the car door drainage structure. Detailed Implementation

[0010] To facilitate understanding, let's first define the directions in the following text: the side closest to the carriage is defined as "inside," the side closest to the outside of the carriage is defined as "outside," the length direction of the carriage is defined as "X-direction," the width direction is defined as "Y-direction," and the height direction is defined as "Z-direction." The following will combine... Figures 1-4 The present invention will be described in further detail below.

[0011] A car door drainage structure includes an outer door panel 10 and an inner door panel 20 with their lower parts abutting each other. A door trim panel 30 is connected to the outer side of the outer door panel 10. The length of the door trim panel 30 is consistent with the X-direction. The bottom edge of the door trim panel 30 extends to the bottom of the outer door panel 10 and the inner door panel 20. A lower door strip 40 is provided between the door trim panel 30 and the bottom of the outer door panel 10 and the inner door panel 20. The length of the lower door strip 40 is consistent with the X-direction. The upper plate of the lower door strip 40... The edge is fixedly connected to the door trim panel 30, and the lower edge extends towards the side panel 50 and seals against the side panel sealing strip 60 (the seal here specifically refers to the situation when the door is closed; when the door is open, the lower door panel 40 is separated from the sealing strip 60). A Z-oriented drainage hole 41 is provided on the lower door panel 40. Water flowing down from the outer door panel 10 and the door frame flows down through the drainage hole 41 and exits the vehicle through the gap between the door trim panel 30 and the lower door panel 40. Figure 4 As shown, the water flow to be discharged is divided into two parts. One part comes from the drain hole on the outer door panel (this is a conventional design; in existing technologies, drain holes are provided on the outer door panel 10, so it will not be described in detail in this invention), and the other part comes from the door frame. The water from the drain hole area of ​​the outer door panel 10 is directly discharged through the drain hole 41 arranged in the Z direction on the lower door strip 40, while the water from the door frame is also discharged through the drain hole after being guided by the lower door strip 40. Since the door trim panel 30 is an exposed exterior component, while the lower door strip 40 is an internal, invisible component, the drain hole 41 is located on the lower door strip 40 to reduce the number of openings in the exterior component and to prevent wind from entering the door cavity when the car is traveling at high speed, thus reducing wind noise.

[0012] As a preferred embodiment of the present invention, the lower door panel 40 is a multi-stage folded plate, including a first vertical plate 42 with its surface arranged vertically. The first vertical plate 42 is fixedly connected to the door decorative panel 30. A transition plate 43 extends from the lower edge of the first vertical plate 42 toward the side sealing strip 60. A second vertical plate 44 is bent downward from the inner edge of the transition plate 43. The junction of the transition plate 43 and the second vertical plate 44 abuts against the side sealing strip 60 to form a sealing fit, effectively preventing splashed water from entering the vehicle. A drain hole 41 is opened on the transition plate 43, and a gap is left between the transition plate 43 and the bottom of the outer door panel 10 and the inner door panel 20, ensuring that water on the inner and outer sides of the outer door panel 10 and the inner door panel 20 can flow into the drain hole 41.

[0013] To ensure that all water at the door frame can enter the drain hole 41, the transition plate 43 includes a drainage channel 431 adjacent to the first vertical plate 42 and a ramp section 432 adjacent to the second vertical plate 44. The ramp section 432 is arranged to gradually slope downwards from the inside to the outside. The length of the drainage channel 431 is consistent with the X-direction, and the drain hole 41 is located at the bottom of the drainage channel 431. Due to the characteristic that water flows downhill, the water at the door frame is guided by the ramp section 432 into the drainage channel 431 and discharged from the drain hole 41.

[0014] For aesthetic matching, the bottom of the outer door panel 10 and the inner door panel 20 are aligned with the junction of the drainage groove 431 and the ramp section 432, and the drainage hole 41 is located on the outside of the outer door panel 10 and the inner door panel 20.

[0015] After multiple experiments, it was finally found that the best effect was achieved when the angle between the slope section 432 and the horizontal plane was 5°.

[0016] According to the overall vehicle styling requirements, the door trim panel 30 has an arc-shaped cross section, including an outer trim panel 31. The bottom edge of the outer trim panel 31 extends toward the bottom edge of the second vertical plate 44, and a bottom trim panel 32 extends from the bottom edge of the outer trim panel 31 toward the bottom edge of the second vertical plate 44. The surface of the bottom trim panel 32 is gradually inclined downward from the outside to the inside, which can guide the water flow. The gap between the bottom edge of the bottom trim panel 32 and the bottom edge of the second vertical plate 44 forms a drainage channel 45. The upper edge of the outer trim panel 31 extends toward the door outer panel 10, and an upper trim panel 33 extends from the top edge of the outer trim panel 31 toward the door outer panel 10. Cover plates 34 are provided at the front and rear ends of the upper trim panel 33, the outer trim panel 31 and the bottom trim panel 32 to cover and hide the internal structure and improve the appearance quality.

[0017] A buckle 36 is provided on the middle of the inner side panel of the outer trim panel 31 and the inner side panel of the upper trim panel 33, protruding towards the outer door panel 10. The buckle 36 is inserted into a locking hole on the outer door panel 10 to form a locking engagement. A BOSS post 37 is provided on the lower part of the inner side panel of the outer trim panel 31, protruding towards the first vertical plate 42. A screw 38 passes through a through hole 421 on the first vertical plate 42 and is fastened to the BOSS post 37. A boss 39 is provided on the inner side panel of the bottom trim panel 32, protruding towards the second vertical plate 44. A latch 391 is provided on the boss 39. A latch 441 protruding from the outer side panel of the second vertical plate 44 is inserted into the latch 391 to form a locking engagement. The door trim panel 30 and the lower door strip 40 are processed using two separate injection molds. The latch 441 in the lower door strip 40 is first inserted into the slot 391 for initial positioning. Then, the lower door strip 40 is assembled to the BOSS pillar 37 using screws 38. The door trim panel supplier assembles the entire assembly into a single module and supplies it to the OEM, thus reducing final assembly time and the number of assembly stations. Finally, the door trim panel 30 is transferred to the vehicle body using clips 36.

[0018] To ensure the reliability of the connections between components and the stability of their postures, multiple buckles 36 and BOSS pillars 37 are spaced apart along the length of the outer trim panel 31 and the upper trim panel 33, multiple bosses 39 are spaced apart along the length of the bottom trim panel 32, and multiple drainage holes 41 are spaced apart along the length of the drainage groove 431. The cavities between the drainage holes 41 and the two bosses 39 are arranged correspondingly, so that the water discharged from the drainage holes 41 can directly reach the inclined surface of the bottom trim panel 32 and then be guided to the drainage channel 45.

[0019] Preferably, some of the drain holes 41 are located directly below the leakage holes of the outer door panel 10, so that the water flowing down from the outer door panel 10 can be directly discharged from the drain holes 41, shortening the drainage time.

[0020] Because the door decorative panel 30 is relatively long, in order to improve its own strength, multiple reinforcing ribs 35 are provided on the inner side of the door decorative panel 30. The surface of the reinforcing ribs 35 is located in the vertical plane. The reinforcing ribs 35 abut against the outer surfaces of the outer panel 31 and the first vertical plate 42 to form a limiting fit. The setting of the reinforcing ribs 35 improves the strength of the door decorative panel 30 itself and prevents its deformation. On the other hand, the outer panels 31 and the first vertical plate 42 also support the door decorative panel 30, further preventing the door decorative panel 30 from deforming or shaking. At the same time, the outer panels 31 and the first vertical plate 42 also limit the position of the door decorative panel 30 in the Y direction to ensure proper installation.

[0021] Furthermore, the bottom plate of the outer door panel 10 covers the inner door panel 20 to form a edging structure, and the drainage hole 41 is on the outside of the edging structure.

Claims

1. A vehicle door drainage structure, comprising a door outer panel (10) and a door inner panel (20) which are attached to each other, and a door trim panel (30) which is attached to an outer side of the door outer panel (10), wherein a length direction of the door trim panel (30) is aligned with an X direction. The bottom edge of the door trim panel (30) extends below the door outer panel (10) and the door inner panel (20), and a door lower strip (40) is arranged between the door trim panel (30) and the bottom of the door outer panel (10) and the door inner panel (20), the length direction of the door lower strip (40) is consistent with the X direction, the upper plate edge of the door lower strip (40) is fixedly connected with the door trim panel (30), the lower plate edge extends towards the side wall (50) and is sealingly connected with the side wall sealing strip (60), and a drainage hole (41) arranged in the Z direction is arranged on the door lower strip (40), so that water flowing from the door outer panel (10) and the door frame flows out of the vehicle through the drainage hole (41) and the gap between the door trim panel (30) and the door lower strip (40); The door lower strip (40) is in a multi-stage folded plate shape and includes a first vertical plate (42) arranged in the vertical direction, the first vertical plate (42) is fixedly connected with the door trim panel (30), the lower plate edge of the first vertical plate (42) extends towards the side wall sealing strip (60) and is provided with a transition plate (43), the inner side plate edge of the transition plate (43) is bent downwards to form a second vertical plate (44), the junction of the transition plate (43) and the second vertical plate (44) abuts against the side wall sealing strip (60) to form a sealing connection, and the drainage hole (41) is arranged on the transition plate (43) and a gap is formed between the transition plate (43) and the bottom of the door outer panel (10) and the door inner panel (20); A buckle (36) is arranged on the middle position of the inner side plate surface of the outer trim panel (31) and the inner side plate surface of the upper trim panel (33) and protrudes towards the door outer panel (10), the buckle (36) is inserted into a clamping hole arranged on the door outer panel (10) to form a clamping connection, and a BOSS column (37) is arranged on the lower position of the inner side plate surface of the outer trim panel (31) and protrudes towards the first vertical plate (42), and a screw (38) is fixedly connected with the BOSS column (37) after penetrating through a through hole (421) arranged on the first vertical plate (42); A boss (39) is arranged on the inner plate surface of the bottom trim panel (32) and protrudes towards the second vertical plate (44), a clamping hole (391) is arranged on the boss (39), and a clamping tongue (441) arranged on the outer plate surface of the second vertical plate (44) is inserted into the clamping hole (391) to form a clamping connection; The transition plate (43) includes a drainage groove (431) adjacent to the first vertical plate (42) and an inclined section (432) adjacent to the second vertical plate (44), the inclined section (432) is arranged to gradually incline downwards from the inner side to the outer side, the groove length of the drainage groove (431) is consistent with the X direction, and the drainage hole (41) is arranged at the groove bottom position of the drainage groove (431); The junction of the bottom of the door outer panel (10) and the door inner panel (20) and the drainage groove (431) and the inclined section (432) is aligned, the drainage hole (41) is located on the outer side of the door outer panel (10) and the door inner panel (20), and the included angle between the inclined section (432) and the horizontal plane is 5°.

2. The automobile door drainage structure according to claim 1, characterized by: The door trim panel (30) is arc-shaped in cross section and comprises an outer trim panel (31), a bottom trim panel (32) extending from the bottom edge of the outer trim panel (31) toward the bottom edge of the second vertical plate (44), the panel surface of the bottom trim panel (32) being arranged to gradually incline downward from outside to inside, the gap between the lower panel edge of the bottom trim panel (32) and the bottom edge of the second vertical plate (44) forming a drainage channel (45), an upper trim panel (33) extending from the upper panel edge of the outer trim panel (31) toward the door outer panel (10), and cover plates (34) arranged at the front and rear ends of the upper trim panel (33), the outer trim panel (31) and the bottom trim panel (32).

3. The automobile door drain structure according to claim 1, characterized by: The buckle (36) and the BOSS column (37) are arranged in multiple numbers in the length direction of the outer trim panel (31) and the upper trim panel (33), the boss (39) is arranged in multiple numbers in the length direction of the bottom trim panel (32), and the drainage hole (41) is arranged in multiple numbers in the length direction of the drainage groove (431) and is arranged in correspondence with the cavity between the two bosses (39).

4. The automobile door drainage structure according to claim 3, characterized by: Some of the drainage holes (41) are located directly below the liquid leakage holes of the door outer panel (10).

5. The automobile door drainage structure according to claim 1, characterized by: The inner side panel surface of the door trim panel (30) is provided with multiple reinforcing rib plates (35), the panel surface of the reinforcing rib plate (35) is located in the vertical plane, and the reinforcing rib plate (35) is in abutting engagement with the outer panel surfaces of the outer trim panel (31) and the first vertical plate (42) to form a limiting fit.

6. The automobile door drainage structure according to claim 1, characterized by: The bottom panel of the door outer panel (10) is wrapped around the door inner panel (20) to form a wrapped edge structure, and the drainage hole (41) is located outside the wrapped edge structure.

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