Equal-plane sealing vehicle body blanking cap and sealing method of vehicle body blanking cap

Abstract

The invention relates to an equal-plane sealing vehicle body blanking cap which comprises a blanking cap body and hot melt adhesive, the blanking cap body is of a circular plate-shaped structure, a fixing part is arranged on the edge of the blanking cap body, the section of the fixing part is in an arc shape, the bent end of the fixing part is a first sealing part, the first sealing part is connected with the blanking cap body, and the opposite end of the first sealing part is a second sealing part. The second sealing part is used for abutting against the outer side of a metal plate hole, the inner side of the fixing part is coated with hot melt adhesive, the hot melt adhesive coating the first sealing part is bent towards the second sealing part to form a hook used for being connected to the inner side of the metal plate hole in a hung mode, the hot melt adhesive coating the second sealing part is used for abutting against the outer side of the metal plate hole, and the hot melt adhesive can be melted when the temperature is high. The framework can move upwards due to the upward elastic force of the pretightening force, the framework vertically moves to the previous horizontal plane from the horizontal plane, so that the plane of the whole structure point of the inner ring is flush with the inner side of the metal plate, and the hot melt adhesive can seal the metal plate hole at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to an isoplanar sealing vehicle body cover and a sealing method for the vehicle body cover. Background Art

[0002] In the process of automobile design and manufacturing, the space requirements are getting higher and higher, especially in new energy vehicles. The space utilization rate of the battery pack in the chassis is quite high, so demanding that the space protrusion on the back of the plug cover installation surface is almost zero. Therefore, the traditional hot melt adhesive plug cover is powerless in this application scenario. In view of this, the author proposed this technical solution to completely solve the problem of the space occupied by the inner circle of the plug cover. Summary of the invention

[0003] In view of this, the present application proposes an isoplanar sealing vehicle body cover and a sealing method for the vehicle body cover, wherein the spatial protrusion on the reverse side of the cover installation surface is required to be almost zero.

[0004] According to one aspect of the present application, there is provided an isoplanar sealing vehicle body plugging cover, which is suitable for sealing a sheet metal hole opened on a chassis sheet metal, comprising: a plugging cover body and hot melt adhesive;

[0005] The plugging cover body is a plate-like structure, and a fixing portion is provided on the edge;

[0006] The cross section of the fixing portion is arc-shaped, and one bent end is a first sealing portion, which is connected to the plugging cover body, and the opposite end of the first sealing portion is a second sealing portion, which is suitable for abutting against the outside of the sheet metal hole;

[0007] Among them, the inner side of the fixing part is coated with the hot melt adhesive, and the hot melt adhesive coated on the first sealing part is bent with a hook toward the second sealing part, which is suitable for hanging on the inner side of the sheet metal hole, and the hot melt adhesive coated on the second sealing part is suitable for abutting against the outer side of the sheet metal hole.

[0008] In a possible implementation, the plugging cover body is made of a high temperature resistant and elastic plastic material;

[0009] The melting range of the hot melt adhesive is between 120°C and 190°C;

[0010] The melting point of the blocking cover body is higher than the melting point of the hot melt adhesive.

[0011] In a possible implementation, a side of the second sealing portion away from the first sealing portion is an abutting end, and the abutting end is spaced from the hook by a first preset distance in a direction perpendicular to the plate surface of the blocking cover body;

[0012] The first preset distance is suitable for being smaller than the thickness of the sheet metal part.

[0013] In a possible implementation, the plugging cover body further includes: a frame;

[0014] The frame is a plate-like structure, and the cross section of the frame is in a "︹" shape;

[0015] The horizontal projection cross section of the fixing portion is an annular structure, which is matched with the fixing portion, and the fixing portion is arranged around the edge of the frame; and

[0016] After the hot melt adhesive is melted, the frame is stretched to abut against the inner wall of the sheet metal hole;

[0017] The preset bending angle between the first sealing portion and the frame is within the range of 80 degrees to 90 degrees.

[0018] In one possible implementation, the frame and the fixing portion are integrally formed.

[0019] In a possible implementation, the abutting end is a straight structure, and when the plugging cover body is installed in the sheet metal hole, the plate surface of the abutting end is suitable for being parallel to the sheet metal;

[0020] A plurality of buffer grooves are formed on the inner side of the second sealing portion along the circumferential direction of the second sealing portion.

[0021] In a possible implementation, a preload angle between the hook and the first sealing portion is in a range of 30 degrees to 180 degrees.

[0022] In a possible implementation, a drainage groove is provided on the inner side of the fixing portion, and the drainage groove is provided in a direction from the fixing portion toward the center of the frame; and

[0023] The number of the drainage grooves is one or more, and more than two drainage grooves are arranged at equal intervals along the circumferential direction of the fixing portion.

[0024] In a possible implementation, a positioning reinforcement rib is provided on the outer side of the plug cover body;

[0025] One end of the positioning reinforcement rib is connected to the frame, and the other end is connected to the fixing portion;

[0026] The number of the positioning reinforcement ribs is more than two, and they are arranged at equal intervals along the circumferential direction of the blocking cover body.

[0027] A sealing method for a vehicle body plug cover, using a uniform plane sealing vehicle body plug cover to perform uniform plane sealing on a sheet metal hole on a sheet metal part;

[0028] S100, embedding the plug cover in the sheet metal hole, hooking the inner side of the sheet metal, and abutting the second sealing part against the outer side of the sheet metal;

[0029] S200, heating the position of the sheet metal hole where the plugging cover is installed, and when the temperature rises to 120 degrees to 190 degrees, the hot melt adhesive begins to melt gradually, and the edge position of the frame recovers its elasticity and moves until the sheet metal hole is flush with the inner side of the sheet metal part;

[0030] S300, the partially melted hot melt adhesive adheres the sheet metal hole and the frame, and the partially melted hot melt adhesive adheres the fixing portion and the sheet metal component.

[0031] The beneficial effects of the equal-plane sealing vehicle body plug cover of the embodiment of the present application: after the double-group plug cover is installed in the sheet metal hole, the rebound force of the plug cover frame forms a pre-tightening force between the plug cover and the sheet metal, and the force-bearing part structure of the inner circle does not use the frame high-temperature resistant material, but cleverly uses hot melt adhesive material. Since the mechanical properties of the hot melt adhesive material are similar to those of the frame high-temperature material at low temperatures, the pre-tightening force remains unchanged, but it will melt at high temperatures (120℃~190℃). When the hot melt adhesive of the inner circle melts, the skeleton will automatically move the skeleton upward as a whole due to the upward elastic force of the pre-tightening force, and move vertically from the horizontal plane to the upper horizontal plane, so that the plane of the overall structural point of the inner circle is flush with the inner side of the sheet metal. At this time, the hot melt adhesive will also seal the sheet metal hole. At the same time, the hot melt adhesive of the outer circle is also bonded and sealed to the outer side of the upper sheet metal of the sheet metal. When the temperature of the sheet metal drops to room temperature, the skeleton of the plug cover is basically flush with the plane of the sheet metal.

[0032] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0034] Figure 1 A schematic cross-sectional view showing the main structure of the isoplanar sealing vehicle body plugging cover according to an embodiment of the present application;

[0035] Figure 2 Another schematic cross-sectional view showing the main structure of the isoplanar sealing vehicle body plug cover according to an embodiment of the present application;

[0036] Figure 3 A partial cross-sectional schematic diagram showing the main structure of the isoplanar sealing vehicle body plug cover according to an embodiment of the present application;

[0037] Figure 4A bottom view schematically shows the main structure of the isoplanar sealing vehicle body plugging cover according to an embodiment of the present application;

[0038] Figure 5 A schematic top view of the main structure of the isoplanar sealing vehicle body cover according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0039] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0040] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0042] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0043] In addition, in order to better illustrate the present application, numerous specific details are provided in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0044] Figure 1 A schematic cross-sectional view showing the main structure of the isoplanar sealing vehicle body cover according to an embodiment of the present application is shown. Figure 2 Another cross-sectional schematic diagram showing the main structure of the isoplanar sealing vehicle body cover according to an embodiment of the present application, Figure 3A partial cross-sectional schematic diagram showing the main structure of the isoplanar sealing vehicle body plug cover according to an embodiment of the present application is shown. Figure 4 A bottom view schematically shows the main structure of the isoplanar sealing vehicle body cover according to an embodiment of the present application, Figure 5 A schematic top view of the main structure of the isoplanar sealing vehicle body cover according to an embodiment of the present application is shown. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the isoplanar sealing vehicle body plugging cover of the embodiment of the present application includes: a plugging cover body 100 and hot melt adhesive 200. The plugging cover body 100 is a plate-like structure, and a fixing portion 122 is bent at the edge. The cross-section of the fixing portion 122 is arc-shaped, and one bent end is a first sealing portion 121, which is connected to the plugging cover body 100. The opposite end of the first sealing portion 121 is a second sealing portion 122, and the second sealing portion 122 is used to abut against the outside of the sheet metal hole, wherein the inner side of the fixing portion 122 is coated with hot melt adhesive 200, and the hot melt adhesive 200 coated on the first sealing portion is bent with a hook 210 toward the second sealing portion 122, which is suitable for hanging on the inner side of the sheet metal hole, and the hot melt adhesive 200 coated on the second sealing portion 122 is used to abut against the outside of the sheet metal hole.

[0045] In this specific embodiment, the plugging cover body 100 is embedded in the sheet metal hole, the bent hot melt adhesive 200 hook 210 is hooked on the inner side of the sheet metal hole of the sheet metal part 300, and the end of the second sealing part 122 away from the first sealing part 121 is in contact with the outer side of the sheet metal part 300. At this time, the second sealing part 122 is tightly attached to the outer side of the sheet metal part 300, and the second sealing part 122 has a pre-tightening force toward the hook 210, so that the plugging cover body 100 can be tightly hooked in the sheet metal hole of the sheet metal part 300. Then, the sheet metal hole position is heated, and the temperature is continuously increased from room temperature to 190 degrees, and the hot melt adhesive 200 will continue to melt at 120 degrees-190 degrees to form a sol state. Since the plugging cover body 100 has an upward pre-tightening force after installation, when the hot melt adhesive 200 finally melts, the outer side of the frame 121 expands and contacts the inner side wall of the sheet metal hole, and can be flush with the inner side of the sheet metal part 300. In this way, the plugging cover body 100 can be flush with the sheet metal hole of the sheet metal part 300 after the hot melt adhesive 200 melts, so that the protrusion of the space inside the sheet metal part 300 is almost zero.

[0046] In a specific embodiment, the plugging cover body 100 is an elastic member with a certain elasticity. In this way, the plugging cover body 100 can produce some deformation, and the plugging cover body 100 coated with hot melt adhesive 200 on the inner side can be embedded in the sheet metal hole on the sheet metal part 300, and the hook 210 formed by injection molding of the hot melt adhesive 200 and located on the inner side of the plugging cover body 100 is hung inside the sheet metal hole.

[0047] Furthermore, in this specific embodiment, the plugging cover body 100 is also a high temperature resistant part, and the melting point of the plugging cover body 100 is higher than the melting point of the hot melt adhesive 200. At a temperature of 120 degrees to 190 degrees, the hot melt adhesive 200 coated on the inner side of the plugging cover body 100 gradually melts and bonds the plugging cover body 100 and the sheet metal hole, while the plugging cover body 100 is not affected by the temperature.

[0048] Specifically, the plugging cover body 100 can be made of nylon or other heat-resistant materials with a melting point in the range of 200-265 degrees. When the temperature gradually rises from room temperature to 190 degrees, the hot melt adhesive 200 gradually dissolves and bonds the plugging cover body 100 and the sheet metal hole to seal the sheet metal hole.

[0049] Example 1

[0050] In a specific embodiment, the plugging cover body 100 includes: a frame 121 and a fixing portion 122. The frame 121 is a circular plate-shaped structure that matches the sheet metal hole and can be embedded in the sheet metal hole. The vertical cross-section of the frame 121 is a "︹"-shaped structure. Since the frame 121 is an elastic member, the edge of the frame 121 can be squeezed. The fixing portion 122 is a hollow ring-shaped structure that matches the frame 121. The fixing portion 122 is integrally formed around the edge of the frame 121 and is used to fix the frame 121 in the sheet metal hole.

[0051] Furthermore, in this specific embodiment, the fixing portion 122 and the frame 121 are integrally formed and made of the same material, both of which are high temperature resistant elastic parts.

[0052] In a specific embodiment, the fixing portion 122 includes a first sealing portion 121 and a second sealing portion 122. The first sealing portion 121 is bent 140 degrees to form the second sealing portion 122, and both the first sealing portion 121 and the second sealing portion 122 are plate-like structures. Among them, the side of the first sealing portion 121 away from the second sealing portion 122 is a connecting end, and the edge position of the skeleton 121 of the plugging cover body 100 is connected and fixed. The side of the second sealing portion 122 away from the first sealing portion 121 is a butting end, which is abutted against the outer side of the sheet metal part 300 to provide installation force for the plugging cover body 100. Hot melt adhesive 200 is coated on the inner side of the first sealing portion 121, and a mold is used to form a hook 210 with an equilateral trapezoidal cross section at the connecting end, which is used to be hung on the inner side of the sheet metal part 300. Specifically, the contact side 1221 of the second sealing portion 122 is spaced apart from the hook 210 formed by the hot melt adhesive 200 by a first preset distance in a direction perpendicular to the plate surface of the plugging cover body 100, and the length of the first preset distance is less than the thickness of the sheet metal part 300. In this way, the plugging cover body 100 can be embedded in the sheet metal hole.

[0053] Among them, one end of the hook 210 covers the connection end of the plugging cover body 100. Specifically, the end of the hook 210 away from the plugging cover body 100 has an angle α with the direction perpendicular to the plugging cover body 100. At the position where the hot melt adhesive contacts the sheet metal part 300, the hook 210 and the sheet metal part 300 have an angle α. The hook is used to bear the pre-tightening force between the plugging cover body 100 and the sheet metal part 300, so that the plugging cover body 100 can be hung in the hole opened on the sheet metal part 300. In addition, the angle α is within the range of 30 degrees to 180 degrees, which improves the installation or protection range of the plugging cover body 100.

[0054] Furthermore, in this specific embodiment, when the plugging cover body 100 is embedded in the sheet metal hole, since the first preset distance is smaller than the thickness of the sheet metal part 300, the abutting side 1221 of the second sealing portion 122 applies a pre-tightening installation force to the sheet metal part 300 in the direction of the hook 210, and the hook 210 applies a reactionary rebound force to the sheet metal part 300 in the direction of the second sealing portion 122, and the magnitude of the installation force is equal to the magnitude of the rebound force, thereby fixing the plugging cover body 100 in the sheet metal hole.

[0055] In this specific embodiment, the plate surface of the first sealing part 121 and the plate surface of the frame 121 are spaced at an angle of 80 degrees, and the frame 121 and the fixing part 122 are both elastic parts, which can embed the frame 121 in the sheet metal hole to avoid excessive installation force of the abutting side 1221 and rebound force of the hook 210, resulting in the fixing part 122 or the frame 121 being broken. Specifically, the frame 121 with a certain elasticity is also convenient for squeezing the frame 121 to be embedded in the sheet metal hole, and when the hot melt adhesive 200 is melted, it can be flush with the inner side of the sheet metal part 300.

[0056] In this specific embodiment, the cross section of the fixing portion 122 is arc-shaped, and the first sealing portion 121 is bent 45 degrees to form the second sealing portion 122. The second sealing portion 122 is used as a bent end of the fixing portion 122 to abut against the outer side of the sheet metal part 300, providing the plugging cover body 100 with an installation force toward the hook 210. In this way, when the plugging cover body 100 is installed in the sheet metal hole, the abutting side 1221 of the second sealing portion 122 and the hook 210 are respectively located on the two sides of the sheet metal part 300 corresponding to each other.

[0057] In a specific embodiment, the cross-section of the abutting end of the second sealing portion 122 is a straight structure, and when the plugging cover body 100 is installed in the sheet metal hole, the abutting end of the second sealing portion 122 can fit the outer side of the sheet metal part 300, thereby improving the firmness of the plugging cover body 100 installed in the sheet metal hole.

[0058] In a specific embodiment, a drainage groove 123 is provided on the inner side of the fixing portion 122, so that the hot melt adhesive 200 can flow from the second sealing portion 122 to the first sealing portion 121 in a sol state. Specifically, the opening direction of the drainage groove 123 is from the abutting end of the second sealing portion 122 to the connecting end of the first sealing portion 121. During the manufacturing process of the plugging cover body 100, the hot melt adhesive 200 is in a sol state at about 190 degrees. The hot melt adhesive 200 is poured along the abutting end of the second sealing portion 122 to the connecting end of the first sealing portion 121, and a hook 210 is formed at the connecting end of the first sealing portion 121 by using a mold.

[0059] Furthermore, in this specific embodiment, four drainage grooves 123 are provided, which are evenly spaced along the circumference of the plugging cover body 100 , so that the hot melt adhesive 200 can be evenly coated on the inner sides of the first sealing portion 121 and the second sealing portion 122 .

[0060] In a specific embodiment, a positioning reinforcement rib 124 is provided on the outside of the plugging cover body 100, and its two ends are respectively connected to the outside of the frame 121 and the outside of the fixing portion 122, so as to improve the rigidity of the plugging cover body 100. Specifically, the reinforcement rib 124 is provided at the connection position between the fixing portion 122 and the frame 121, and the length of the reinforcement rib 124 is small, so as not to affect the elasticity of the fixing portion 122 relative to the frame 121.

[0061] Example 2

[0062] In combination with Example 1, in a specific embodiment, hot melt adhesive 200 is also coated on the inner side of the second sealing portion 122. At 120 degrees to 190 degrees, the hot melt adhesive 200 coated on the inner side of the second sealing portion 122 gradually melts, and after cooling to room temperature, the abutting end of the second sealing portion 122 is bonded to the outer side of the sheet metal 300, thereby improving the sealing stability of the plugging cover body 100 and the sheet metal 300.

[0063] Furthermore, in this specific embodiment, a plurality of buffer grooves 1222 are provided along the circumference of the fixing portion 122 at the inner side of the second sealing portion 122 and adjacent to the abutting end, so as to delay the hot melt adhesive 200 in the form of sol from slowly flowing to the abutting end of the second sealing portion 122. In a high temperature environment of 120-190 degrees, the hot melt adhesive 200 coated on the fixing portion 122 gradually melts in a high temperature environment of 120-190 degrees, the hot melt adhesive 200 located on the inner side of the first sealing portion 121 melts, and after cooling to room temperature, it bonds the inner side wall of the sheet metal hole to the connecting end of the first sealing portion 121, and the hot melt adhesive 200 located on the inner side of the second sealing portion 122 melts, and after cooling to room temperature, it bonds the outer side of the sheet metal part 300 to the abutting end of the second sealing portion 122, thereby increasing the bonding force between the plugging cover body 100 and the sheet metal part 300.

[0064] A sealing method for a vehicle body plug cover, using a uniform plane sealing vehicle body plug cover to perform uniform plane sealing on a sheet metal hole on a sheet metal part 300;

[0065] S100, embed the plugging cover in the sheet metal hole, hook 210 is hooked on the inner side of the sheet metal part 300, and the second sealing part 122 is abutted against the outer side of the sheet metal part 300;

[0066] S200, the sheet metal hole where the plugging cover is installed is heated. When the temperature rises to 120 degrees to 190 degrees, the hot melt adhesive 200 begins to melt gradually, and the edge of the frame 121 recovers its elasticity and moves until the sheet metal hole is flush with the inner side of the sheet metal part 300;

[0067] S300 , the partially melted hot melt adhesive 200 adheres to the sheet metal hole and the frame 121 , and the partially melted hot melt adhesive 200 adheres to the fixing portion 122 and the sheet metal component 300 .

[0068] In this specific embodiment, regarding S100, the plugging cover is embedded in the sheet metal hole, the hook 210 is hooked on the inner side of the sheet metal 300, and the second sealing portion 122 abuts against the outer side of the sheet metal 300. The plugging cover body 100 matches the sheet metal hole, and when the plugging cover body 100 is embedded in the sheet metal hole, the plugging cover body 100 is sealed with the sheet metal hole. At this time, the hot melt adhesive 200 coated on the inner side of the plugging cover body 100 is hooked on the inner side of the sheet metal 300 by using the hook 210 formed by the mold, and the fixing portion 122 of the plugging cover body 100 is an arc-shaped structure, and the end away from the plugging cover body 100 abuts against the outer side. Since the spacing distance between the abutting side 1221 of the blocking cover body 100 and the hook 210 in the direction perpendicular to the blocking cover body 100 is smaller than the thickness of the sheet metal 300, the abutting side 1221 of the blocking cover body 100 has a pre-tightening installation force toward the sheet metal 300, and the hook 210 has a rebound force toward the sheet metal 300, thereby fixing the blocking cover body 100 in the sheet metal hole.

[0069] In this specific embodiment, regarding S200, the position of the sheet metal hole where the plugging cover is installed is heated. When the temperature rises to 120 degrees to 190 degrees, the hot melt adhesive 200 begins to melt gradually, and the edge position of the skeleton 121 recovers its elasticity and rotates until the sheet metal hole is flush with the inner side of the sheet metal part 300. The hot melt adhesive 200 gradually melts within 120 degrees to 190 degrees, and the plugging cover body 100 is a high-temperature resistant elastic part, which can be made of nylon with a melting point higher than 190 degrees, and is not affected when the hot melt adhesive 200 melts. After the hot melt adhesive 200 melts, the position where the skeleton 121 is connected to the fixing part 122 recovers its original position due to elasticity, and gradually rotates toward the inner side of the sheet metal hole until it is flush with the inner side of the sheet metal part 300.

[0070] The elastic force of the squeezed skeleton 121 is equal to the pre-tightening force between the second sealing portion 122 and the hook 210, so that the skeleton 121 can be stretched to be flush with the inner side of the sheet metal part 300 after the hot melt adhesive 200 melts. Moreover, the diameter of the skeleton 121 after stretching is equal to the diameter of the sheet metal hole, so that the sheet metal hole can be sealed.

[0071] In this specific embodiment, S300, the partially melted hot melt adhesive 200 adheres to the sheet metal hole and the frame 121, and the partially melted hot melt adhesive 200 adheres to the fixing portion 122 and the sheet metal part 300. In a high temperature environment of 120 degrees to 190 degrees, the hot melt adhesive 200 gradually melts, and the frame 121 stretches to seal the inside of the sheet metal hole. The partially melted hot melt adhesive 200 flows on the circular edge of the frame 121 and the inner wall of the sheet metal hole. When the temperature drops to room temperature, the hot melt adhesive 200 is fixed and adhered to the frame 121 and the sheet metal hole, increasing the bonding strength between the plug cover body 100 and the sheet metal part 300. Another portion of the melted hot melt adhesive 200 flows between the abutting end of the plugging cover body 100 and the outer side of the sheet metal part 300 . When the temperature drops to room temperature, the hot melt adhesive 200 fixes the adhesive fixing portion 122 and the sheet metal part 300 , thereby increasing the bonding strength between the plugging cover body 100 and the sheet metal part 300 .

[0072] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A uniform plane sealing vehicle body plug cover, suitable for sealing a sheet metal hole opened on a chassis sheet metal, characterized in that: include: Plug cover body and hot melt adhesive; The plugging cover body is a plate-like structure, and a fixing portion is provided on the edge; The cross section of the fixing portion is arc-shaped, and one bent end is a first sealing portion, which is connected to the plugging cover body, and the opposite end of the first sealing portion is a second sealing portion, which is suitable for abutting against the outer side of the sheet metal hole; Among them, the inner side of the fixing part is coated with the hot melt adhesive, and the hot melt adhesive coated on the first sealing part is bent with a hook toward the second sealing part, which is suitable for hanging on the inner side of the sheet metal hole, and the hot melt adhesive coated on the second sealing part is suitable for abutting against the outer side of the sheet metal hole.

2. The isoplanar sealing vehicle body cover according to claim 1, characterized in that: The plugging cover body is made of high temperature resistant and elastic plastic material; The melting range of the hot melt adhesive is between 120°C and 190°C; The melting point of the blocking cover body is higher than the melting point of the hot melt adhesive.

3. The isoplanar sealing vehicle body cover according to claim 1, characterized in that: The side of the second sealing portion away from the first sealing portion is an abutting end, and the abutting end is spaced apart from the hook by a first preset distance in a direction perpendicular to the plate surface of the blocking cover body; The first preset distance is suitable for being smaller than the thickness of the sheet metal part.

4. The isoplanar sealing vehicle body cover according to any one of claims 1 to 3, characterized in that: The plugging cover body also includes: a frame; The frame is a plate-like structure, and the cross section of the frame is in a "︹" shape; The horizontal projection cross section of the fixing portion is an annular structure, which is matched with the fixing portion, and the fixing portion is arranged around the edge of the frame; and After the hot melt adhesive is melted, the frame is stretched to abut against the inner wall of the sheet metal hole; The preset bending angle between the first sealing portion and the frame is within the range of 80 degrees to 90 degrees.

5. The isoplanar sealing vehicle body cover according to claim 4, characterized in that: The frame and the fixing portion are integrally formed.

6. The isoplanar sealing vehicle body cover according to claim 3, characterized in that: The abutting end is a straight structure, and when the plugging cover body is installed in the sheet metal hole, the plate surface of the abutting end is suitable to be parallel to the sheet metal; A plurality of buffer grooves are formed on the inner side of the second sealing portion along the circumferential direction of the second sealing portion.

7. The isoplanar sealing vehicle body cover according to claim 4, characterized in that: The preload angle between the hook and the first sealing portion is in the range of 30 degrees to 180 degrees.

8. The isoplanar sealing vehicle body cover according to claim 4, characterized in that: A drainage groove is provided on the inner side of the fixing portion, and the drainage groove is provided in a direction from the fixing portion toward the center of the frame; and The number of the drainage grooves is one or more, and the drainage grooves are arranged at equal intervals along the circumferential direction of the fixing portion.

9. The isoplanar sealing vehicle body cover according to claim 4, characterized in that: The outer side of the plug cover body is provided with positioning reinforcement ribs; One end of the positioning reinforcement rib is connected to the frame, and the other end is connected to the fixing portion; The number of the positioning reinforcement ribs is more than two, and they are arranged at equal intervals along the circumferential direction of the blocking cover body.

10. A method for sealing a vehicle body cover, using the isoplanar sealing vehicle body cover according to any one of claims 1 to 9 to perform isoplanar sealing on a sheet metal hole on a sheet metal part; S100, embedding the plug cover in the sheet metal hole, hooking the inner side of the sheet metal, and abutting the second sealing part against the outer side of the sheet metal; S200, heating the position of the sheet metal hole where the plugging cover is installed, and when the temperature rises to 120 degrees to 190 degrees, the hot melt adhesive begins to melt gradually, and the edge position of the frame recovers its elasticity and moves until the sheet metal hole is flush with the inner side of the sheet metal part; S300, the partially melted hot melt adhesive adheres the sheet metal hole and the frame, and the partially melted hot melt adhesive adheres the fixing portion and the sheet metal component.

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