Back door upper electrophoretic exhaust structure, back door of automobile and automobile with same

Abstract

The utility model relates to automobile back door processing technical field discloses a back door upper part electrophoresis exhaust structure, automobile back door and have its automobile, including back door outer plate, back door inner plate and boss, wherein, one end of back door outer plate is provided with the bound edge, the bound edge is folded to the direction of the other end of back door outer plate direction, back door inner plate includes first base plate and second base plate, the bound edge is wrapped first base plate, second base plate is spaced apart with back door outer plate, and back door cavity is formed between second base plate and back door outer plate, one end of second base plate close to first base plate is provided with exhaust hole, through the exhaust hole of the upper part of back door inner plate, guarantee back door inner plate and back door outer plate after entering electrophoresis tank, back door cavity gas can be exhausted, and electrophoresis in back door cavity is not influenced, and moreover through the avoidance hole on the boss guide, make gas directional flow to exhaust hole, and gas discharge efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of automotive tailgate processing technology, and in particular to an electrophoretic exhaust structure for the upper part of a tailgate, an automotive tailgate, and an automotive having the same. Background Technology

[0002] Automotive electrophoretic paint protects the car body sheet metal and has a good anti-corrosion effect. If the electrophoresis is not done well, it will greatly affect the anti-corrosion effect of the car body and cause rust on the sheet metal. At present, most automotive painting production workshops use a 45° angle immersion in the electrophoresis tank for pretreatment electrophoresis. When the white car body is immersed in the electrophoresis tank, the upper part of the car tailgate needs to be designed with an exhaust hole to release the gas and avoid affecting the electrophoresis effect.

[0003] Because of the low density of gas, when the car body enters the electrophoresis tank, the air rises above the liquid. Current technology uses exhaust vents on the inner panel of the tailgate, but these vents cannot open to their highest point. Figure 1 and Figure 2 As shown, there is a 7mm distance between the vent hole and the upper part of the inner plate, which will prevent the gas between the vent hole and the upper part of the inner plate from escaping, resulting in poor electrophoresis. The vent hole can be plugged by using a patch after the coating electrophoresis is completed. However, the manufacturing cost of using a patch to plug the vent hole is high.

[0004] For example, Chinese utility model patent with publication number CN209383880U discloses an electrophoretic exhaust structure for the upper part of the back door.

[0005] In the above technical solution, it is not clearly stated that the exhaust notch is located at the highest point of the cavity between the inner and outer panels of the tailgate. This will still result in the gas in the cavity not being able to be completely discharged when the tailgate enters the electrophoresis tank, and the residual gas area cannot be covered by the electrophoretic paint, thus affecting the corrosion resistance of the car body. Utility Model Content

[0006] To overcome at least one of the defects described in the prior art, this utility model provides an upper electrophoretic exhaust structure for a tailgate, a car tailgate, and a car having the same. By opening an exhaust hole in the upper part of the inner panel of the tailgate, it is ensured that the gas inside the tailgate cavity can be completely exhausted after the inner and outer panels of the tailgate enter the electrophoresis tank, and the electrophoresis inside the tailgate cavity is not affected; moreover, the gas is guided to the exhaust hole by the clearance hole on the boss, resulting in higher gas emission efficiency.

[0007] The technical solution of this utility model is implemented as follows:

[0008] An electrophoretic exhaust structure for the upper part of a tailgate includes an outer tailgate panel, an inner tailgate panel, and a boss. One end of the outer tailgate panel is provided with a edging, which is bent toward the other end of the outer tailgate panel. The inner tailgate panel includes a first substrate and a second substrate. The edging wraps around the first substrate. The second substrate is spaced apart from the outer tailgate panel, and a tailgate cavity is formed between the second substrate and the outer tailgate panel.

[0009] The second substrate has an exhaust hole at one end near the first substrate;

[0010] The boss is located between the outer panel of the back door and the second base plate. The boss has a clearance hole for avoiding the gas discharged from the back door cavity. The back door cavity, the clearance hole and the exhaust hole are connected.

[0011] Based on the above technical solutions, preferably, the first substrate and the second substrate are integrally formed.

[0012] Based on the above technical solutions, preferably, the outer panel of the back door and the edging are integrally formed.

[0013] Based on the above technical solutions, preferably, the vent hole is sealed with sealant.

[0014] Based on the above technical solutions, preferably, the sealant is PVC adhesive.

[0015] Based on the above technical solutions, preferably, the cross-section of the exhaust port is rectangular.

[0016] Based on the above technical solutions, preferably, the boss is in contact with the first substrate.

[0017] Based on the above technical solutions, preferably, the side of the boss near the exhaust hole is a smooth slope.

[0018] This utility model also provides a car tailgate, which includes the above-described electrophoretic exhaust structure at the upper part of the tailgate.

[0019] This utility model also provides a car that includes the above-described car tailgate.

[0020] In summary, the electrophoretic exhaust structure for the upper part of the back door provided by this utility model has the following advantages over the prior art:

[0021] (1) By setting an exhaust hole and placing the exhaust hole on the second base plate, with the exhaust hole corresponding to the highest point of the back door cavity, the air in the back door cavity can be completely discharged without affecting the electrophoresis effect of the back door inner panel and the back door outer panel, thus ensuring its sheet metal anti-corrosion effect.

[0022] (2) By setting the boss, the gas in the back door cavity will be guided by the clearance hole of the boss, so that the gas flows in a direction to the exhaust hole, reducing stagnation and making the exhaust efficiency more stable.

[0023] (3) By replacing the patch with sealant to seal the vent hole, the manufacturing cost is reduced;

[0024] (4) The sealant is achieved by directly sealing the vent hole with sealant. PVC sealant has good filling performance, making the sealing operation simpler and the sealing effect uniform and reliable. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a front view of the inner and outer panels of the tailgate, based on existing technology.

[0027] Figure 2 Cross-sectional views of the inner and outer panels of the tailgate in the prior art;

[0028] Figure 3 This is a front view of an embodiment of the present utility model;

[0029] Figure 4 This is a schematic diagram of gas flow according to an embodiment of the present invention;

[0030] Figure 5 This is a cross-sectional view of an embodiment of the present utility model;

[0031] The meanings of the reference numerals in the attached drawings are as follows: 1. Outer panel of the back door; 11. Edge banding; 2. Inner panel of the back door; 21. First base plate; 22. Second base plate; 221. Exhaust hole; 3. Boss; 31. Clearance hole; 4. Back door cavity. Detailed Implementation

[0032] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0033] See Figures 3-5This utility model discloses an electrophoretic exhaust structure for the upper part of the tailgate, including an outer tailgate panel 1, an inner tailgate panel 2, and a boss 3.

[0034] See Figure 4 and Figure 5 As shown, in this embodiment, one end of the outer panel 1 of the back door is provided with a edging 11, which is bent toward the other end of the outer panel 1 of the back door. Specifically, the bending angle of the edging 11 is 180°, and the edging 11 is parallel to the outer panel 1 of the back door. The length of the edging 11 is less than the length of the outer panel 1 of the back door, so as to ensure that the edging 11 can wrap the inner panel 2 of the back door. At the same time, the parallel design of the edging 11 and the outer panel 1 of the back door can also ensure the overall flatness and aesthetics of the outer panel 1 of the back door.

[0035] In this embodiment, the outer panel 1 of the back door and the edging 11 are integrally formed, completed in one processing step through a stamping process. This integral forming design eliminates connection gaps, improves the overall structural strength and sealing performance of the outer panel 1 and the edging 11, and reduces water and air leakage problems caused by loose connections or poor sealing. The outer panel 1 and the edging 11 are made of high-strength, corrosion-resistant steel, such as cold-rolled steel sheet, which has excellent stamping and forming performance.

[0036] See Figure 4 and Figure 5 As shown, in this embodiment, the inner panel 2 of the back door includes a first substrate 21 and a second substrate 22, which are arranged sequentially with a height difference between them. This design allows the first substrate 21 to fit snugly against the edging 11, while the second substrate 22 is spaced apart from the outer panel 1 of the back door. The first substrate 21 and the second substrate 22 are integrally formed and completed in one processing step through a stamping process. The connection between the two is seamless, with a smooth and flat surface, which enhances the structural strength of the inner panel 2 of the back door and improves its overall sealing performance, avoiding water seepage and air leakage problems caused by seams. The materials of the first substrate 21 and the second substrate 22 are also selected from high-strength, corrosion-resistant steel, such as cold-rolled steel plate, to ensure the durability and stability of the inner panel 2 of the back door.

[0037] See Figure 4 and Figure 5 As shown, in this embodiment, the edging 11 wraps around the first substrate 21. The edging 11 wraps around the edge of the first substrate 21 by welding process to ensure that the relative position between the first substrate 21 and the back door outer panel 1 is fixed, while ensuring the strength and sealing of the connection part; the second substrate 22 is spaced apart from the back door outer panel 1, and a back door cavity 4 is formed between the second substrate 22 and the back door outer panel 1, and air can flow in the back door cavity 4.

[0038] See Figure 3As shown, in this embodiment, the second substrate 22 is provided with an exhaust hole 221 at one end near the first substrate 21. The exhaust hole 221 corresponds to the highest point of the tailgate cavity 4 and is connected to the tailgate cavity 4. When the white body enters the electrophoresis tank, due to the low density of the gas, the air will rise to the higher position of the tailgate cavity 4. The exhaust hole 221 is located here to ensure that the gas can be completely discharged without affecting the electrophoresis effect and ensuring the anti-corrosion effect of the tailgate sheet metal.

[0039] See Figure 5 As shown, in this embodiment, the boss 3 is located between the outer panel 1 of the back door and the second substrate 22. The boss 3 has a clearance hole 31 for avoiding the gas discharged from the back door cavity 4. The back door cavity 4, the clearance hole 31 and the exhaust hole 221 are connected to ensure that the gas in the back door cavity 4 can be accurately guided through the clearance hole 31 and discharged from the exhaust hole 221. Gas tends to stagnate at the top of the corners inside the back door cavity 4. The boss 3 is located between the outer panel 1 of the back door and the second substrate 22 and is in close contact with the outer panel 1 of the back door and the second substrate 22. It can guide the gas into the clearance hole 31 and discharge it from the exhaust hole 221, reducing the gas residue inside the back door cavity 4. Moreover, the gas can directly enter the exhaust hole 221 under the guidance of the boss 3, reducing the flow path and improving efficiency.

[0040] Specifically, the boss 3 is integrally formed with the outer panel 1 of the back door and the second base plate 22. This design eliminates the connection gaps and ensures the structural strength and stability of the boss 3.

[0041] See Figure 3 and Figure 5 As shown, in this embodiment, the cross-section of the exhaust port 221 is rectangular. The gas guided by the boss 3 can naturally transition to the exhaust port 221, avoiding airflow turbulence caused by the difference in cross-sectional shape. When the gas enters the exhaust port 221, it does not need to diffuse laterally or contract, maintaining a stable flow rate and direction, and the exhaust efficiency is significantly improved.

[0042] See Figure 3As shown in this embodiment, the vent hole 221 has a length of 8mm and a width of 3mm. This 8mm length and 3mm width are more reasonable, ensuring smooth gas discharge and providing sufficient venting area. This allows the gas to be quickly discharged when the electrophoretic liquid enters the cavity, ensuring uniform coverage of the inner and outer panels of the back door and improving electrophoresis quality. Furthermore, the 8mm length and 3mm width design has minimal impact on the overall structural strength of the inner panel 2 of the back door. Compared to a larger vent hole 221, this design avoids stress concentration and structural weakening caused by an excessively large opening, ensuring that the inner panel 2 of the back door will not suffer structural reliability reduction due to the size of the vent hole 221 when subjected to opening, closing, vibration, and other loads during normal use. The side of the boss 3 near the vent hole 221 is a smooth slope, facilitating the smooth entry of the clearance hole 31 on the boss 3 into the vent hole 221.

[0043] See Figure 5 As shown, in this embodiment, the highest height of the boss 3 is set to 2mm, that is, the boss 3 is fixed to the back door outer panel 1 and the second base plate 22. The boss 3 is located near the exhaust hole 221. Moreover, this design can make the distance between the boss 3 and the exhaust hole 221 close, ensuring that the gas can accurately enter the exhaust hole 221.

[0044] In this embodiment, after the body-in-white electrophoresis is completed, the vent 221, as the connection between the tailgate cavity 4 and the outside, needs to prevent the intrusion of moisture, dust, and corrosive media. The vent 221 is sealed with sealant to ensure a good seal, and instead of using patches for sealing, the amount of patches used is reduced, lowering manufacturing costs. It should also be noted that the sealant is PVC adhesive. The elastic seal formed after PVC adhesive cures can tightly adhere to the inner wall and edges of the vent 221. Furthermore, the boss 3 is in contact with the first substrate 21. This design reduces the amount of sealant needed when sealing the vent 221.

[0045] This utility model also provides a car tailgate, which includes the above-mentioned upper electrophoretic exhaust structure. Since the car tailgate adopts all the technical solutions of the above embodiments, it also possesses all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0046] This utility model also provides a car, which includes the above-described tailgate. Since the car adopts all the technical solutions of the above embodiments, it also possesses all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0047] Specific implementation steps:

[0048] The body-in-white is placed in the electrophoresis tank at a 45° angle. Electrophoresis is performed on the outer tailgate panel 1 and the inner tailgate panel 2. The gas in the tailgate cavity 4 will be discharged from the exhaust port 221 through the clearance hole 31 on the boss 3. After the electrophoresis process is completed, the exhaust port 221 is sealed with sealant to ensure airtightness.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrophoretic exhaust structure for the upper part of a back door, characterized in that, Includes the outer rear door panel (1), the inner rear door panel (2), and the boss (3), wherein, One end of the outer panel (1) of the back door is provided with a edging (11), which is bent toward the other end of the outer panel (1); The inner panel (2) of the back door includes a first substrate (21) and a second substrate (22). The edging (11) wraps around the first substrate (21). The second substrate (22) is spaced apart from the outer panel (1) of the back door. A back door cavity (4) is formed between the second substrate (22) and the outer panel (1) of the back door. The second substrate (22) has an exhaust hole (221) at one end near the first substrate (21); The boss (3) is located between the outer panel (1) of the back door and the second base plate (22). The boss (3) has a clearance hole (31) for avoiding the gas discharged from the back door cavity (4). The back door cavity (4), the clearance hole (31) and the exhaust hole (221) are connected.

2. The electrophoretic exhaust structure on the upper part of the back door according to claim 1, characterized in that, The first substrate (21) and the second substrate (22) are integrally formed.

3. The electrophoretic exhaust structure on the upper part of the back door according to claim 1, characterized in that, The outer panel (1) of the back door and the edging (11) are integrally formed.

4. The electrophoretic exhaust structure on the upper part of the back door according to claim 1, characterized in that, The vent (221) is sealed with sealant.

5. The electrophoretic exhaust structure on the upper part of the back door according to claim 4, characterized in that, The sealant is PVC adhesive.

6. The electrophoretic exhaust structure for the upper part of the back door according to claim 1, characterized in that, The cross-section of the exhaust port (221) is rectangular.

7. The electrophoretic exhaust structure for the upper part of the back door according to claim 1, characterized in that, The boss (3) is in contact with the first substrate (21).

8. The electrophoretic exhaust structure for the upper part of the back door according to claim 7, characterized in that, The side of the boss (3) near the exhaust port (221) is a smooth slope.

9. A car tailgate, characterized in that, Includes the electrophoretic exhaust structure on the upper part of the back door as described in any one of claims 1-8.

10. A car, characterized in that, Including the car tailgate as described in claim 9.

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