A sealing strip for improving back door paint grinding

Abstract

The utility model relates to the technical field of automobile parts, and more specifically, to a sealing strip for improving the wear of the back door paint. It comprises a clamping part and a sealing strip, both ends of the sealing strip are connected to the clamping part, a cavity is provided between the sealing strip and the clamping part, the outer surface of the sealing strip is set as a smooth curved surface, and a lubricating layer is sprayed on the outer surface of the sealing strip. The utility model sets the outer surface of the sealing strip as a smooth curved surface so that the sealing strip has only a single layer of contact with the back door, thereby reducing the sealing reaction force and thus reducing the friction. At the same time, the lubricating layer is sprayed on the outer surface of the sealing strip, which plays a role in lubricating the contact between the sealing strip and the back door, and can further reduce the friction between the back door and the sealing strip, thereby reducing the wear of the back door paint during the driving of the vehicle and protecting the back door paint surface.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, and more specifically to a sealing strip for improving the grinding of paint on a back door. Background Art

[0002] The tailgate frame sealing strip of a car is usually formed by composite extrusion of dense rubber, sponge rubber and metal frame, and installed on the sheet metal edge of the tailgate frame by snap-on. Its main functions are waterproof, dustproof, soundproof and cushioning the impact when the tailgate is closed.

[0003] The prior art discloses a hatchback sealing strip for a vehicle, comprising a sealing strip body and a lip connected to the sealing strip body, wherein the sealing strip body comprises a bubble tube with a small protruding lip. When the hatchback is closed, the bubble tube contacts the hatchback to seal. Since the hatchback is not completely rigid, the hatchback and the hatchback door frame move relative to each other during the driving of the vehicle, causing the hatchback to rub against the bubble tube lip of the hatchback frame sealing strip, which causes the paint surface of the hatchback to wear over time. Utility Model Content

[0004] The utility model aims to provide a sealing strip for improving the paint abrasion of a back door, which can reduce the friction between the sealing strip and the back door while ensuring the sealing effect, thereby reducing the paint abrasion of the back door during the driving of the vehicle.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A sealing strip for improving back door paint grinding comprises a clamping part and a sealing strip, both ends of the sealing strip are connected to the clamping part, a cavity is provided between the sealing strip and the clamping part, the outer surface of the sealing strip is set as a smooth curved surface, and a lubricating layer is sprayed on the outer surface of the sealing strip.

[0007] According to the above technical means, the utility model provides a sealing strip for improving the wear of the back door paint. During installation, the clamping part of the sealing strip is clamped on the vehicle body frame for fixation. The sealing strip abuts against the back door. The effect of the cavity allows the sealing strip to deform, which can play the role of waterproofing, dustproofing, soundproofing and buffering the impact of the back door when closing for the back door at different distances. The outer surface of the sealing strip is set to a smooth curved surface, so that the sealing strip and the back door have only a single layer of contact, reducing the sealing reaction force, thereby reducing the friction. At the same time, a lubricating layer is sprayed on the outer surface of the sealing strip, which plays a lubricating role in the contact between the sealing strip and the back door, and can further reduce the friction between the back door and the sealing strip, thereby reducing the wear of the back door paint during the driving of the vehicle and protecting the back door paint surface.

[0008] Furthermore, the outer surface of the sealing strip is set to be arc-shaped. The arc-shaped outer surface can further ensure the smoothness of the outer surface of the sealing strip, and only a single-layer sealing structure is provided between the sealing strip and the back door, thereby minimizing the friction between the back door and the sealing strip.

[0009] Furthermore, the material of the lubricating layer is silicon-modified water-soluble polyurethane resin. Using water-soluble paint is more environmentally friendly and non-toxic than fat-soluble paint.

[0010] Furthermore, the thickness of the lubricating layer is at least 10 micrometers. The thickness of the lubricating layer can ensure durability and prevent the lubricating layer from being worn out in a short time.

[0011] Furthermore, the inner surface of the sealing strip is provided with at least two weakened grooves, which allow the sealing strip to deform in a desired direction when compressed, thereby preventing the sealing strip from deforming randomly and ensuring the sealing effect.

[0012] Furthermore, the clamping part includes a steel belt frame and a rubber strip sleeved on the outer periphery of the steel belt frame, the bottom of the rubber strip is provided with an opening, the sealing strip is installed on the rubber strip on the side away from the opening, and a plurality of grooves are provided on the outer side of the rubber strip. The steel belt frame is used to ensure the clamping force of the clamping part, and the rubber strip is used to prevent the steel belt frame from directly contacting the vehicle body frame and causing damage to the vehicle body frame. The provision of the grooves can reduce the frame mark of the steel belt frame, which can be more beautiful.

[0013] Furthermore, the inner walls on both sides of the rubber strip are provided with a plurality of inner teeth at intervals. The arrangement of the inner teeth enables the clamping part to be better clamped on the vehicle body frame, thereby increasing the friction resistance and preventing the sealing strip from falling off.

[0014] Furthermore, a soft convex bump is provided at the inner top of the rubber strip. When clamping, there will be a gap between the inner top of the rubber strip and the vehicle body frame. The soft convex bump can better fill the gap, thereby effectively preventing water leakage at the gap.

[0015] Furthermore, a bubble tube is provided at the bottom of the rubber strip, and the bubble tube is integrally formed with the inner teeth at the bottom. The bubble tube can further enhance the sealing effect; the bubble tube and the inner teeth at the bottom are connected to the rubber strip, which can increase the connection area between the bubble tube and the rubber strip and avoid cracking.

[0016] Furthermore, a lip is provided on one side of the rubber strip, and a technical rib is provided between the rubber strip and the lip. The lip is provided to cover the gap between the sealing strip and the ceiling and the decorative panel; during installation, the provision of the technical rib can facilitate the lip to be brought out from the bottom of the decorative panel or the ceiling to the top.

[0017] Furthermore, the process ribs are installed on the inner side of the lip edge, which can prevent the steel strip from leaking out when the strip is installed on the outer side of the rubber strip.

[0018] Furthermore, the process rib is in surface contact or line contact with the lip edge. Reducing the contact area can be more conducive to tearing the process rib.

[0019] Furthermore, an anti-crack block is provided on the inner side of the lip, and the process rib is installed on the anti-crack block. By providing the anti-crack block, when the process rib is torn, the anti-crack block remains on the inner side of the lip, which can avoid tearing the lip.

[0020] Compared with the prior art, the beneficial effects are:

[0021] 1. The utility model provides a sealing strip for improving the paint abrasion of the back door. By setting the outer surface of the sealing strip as a smooth curved surface, the sealing strip has only a single layer of contact with the back door, reducing the sealing reaction force, thereby reducing the friction. At the same time, a lubricating layer is sprayed on the outer surface of the sealing strip to lubricate the contact between the sealing strip and the back door, which can further reduce the friction between the back door and the sealing strip, thereby reducing the paint abrasion of the back door during the driving of the vehicle and protecting the paint surface of the back door.

[0022] 2. The utility model provides a sealing strip for improving the back door paint grinding. By forming the bubble tube and the lowermost inner teeth as one piece, the bubble tube and the lowermost inner teeth are connected to the rubber strip together, which can increase the connection area between the bubble tube and the rubber strip and prevent the bubble tube from falling off.

[0023] 3. The utility model provides a sealing strip for improving the back door paint grinding. By arranging an anti-cracking block, the anti-cracking block remains on the inner side of the lip when the process rib is torn, thereby preventing the lip from being torn. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the installation of a sealing strip for improving the back door paint grinding of the utility model;

[0025] Figure 2 This is a schematic diagram of the overall structure of the sealing strip for improving the back door paint grinding of the utility model;

[0026] Figure 3 This is a cross-sectional material distribution diagram in Example 3 of the utility model;

[0027] Figure 4 This is a cross-sectional material distribution diagram in Example 4 of the utility model;

[0028] Figure 5 It is a schematic diagram of the steel belt structure of the utility model.

[0029] Among them, the illustrated markings are explained as follows: 100, body frame; 200, tailgate; 300, EPDM sponge rubber; 400, EPDM dense rubber; 1. Clamping part; 101, steel belt skeleton; 102, rubber strip; 121, groove; 103, opening; 2. sealing strip; 201, weakened groove; 3. cavity; 4. lubricating layer; 5. inner teeth; 6. soft convex bump; 7. bubble tube; 8. lip; 9. process rib; 10. anti-cracking block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention is described in one of the embodiments in combination with the specific implementation methods. Among them, the drawings are only used for exemplary descriptions, and only schematic diagrams are shown, not physical drawings, and cannot be understood as limitations on the present invention; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for exemplary explanations and cannot be understood as limiting the present invention. For ordinary technicians in the field, the specific meanings of the above terms can be understood according to specific circumstances. In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B.

[0032] Example 1

[0033] like Figures 1 to 5 As shown, this embodiment proposes a sealing strip for improving the back door paint grinding, including a clamping part 1 and a sealing strip 2, both ends of the sealing strip 2 are connected to the clamping part 1, a cavity 3 is provided between the sealing strip 2 and the clamping part 1, the outer surface of the sealing strip 2 is set to be a smooth curved surface, and the outer surface of the sealing strip 2 is sprayed with a lubricating layer 4.

[0034] According to the above technical means, the utility model provides a sealing strip for improving the grinding of the back door paint. During installation, the clamping part 1 of the sealing strip is clamped on the vehicle body frame 100 for fixing, and the sealing strip 2 is abutted against the back door 200. The cavity 3 allows the sealing strip 2 to deform, and can play the role of waterproofing, dustproofing, soundproofing and buffering the impact of the back door 200 when closing the back door at different distances. The area of ​​the cavity 3 here is larger than that of the common sealing strip, which can increase the contact area between the sealing strip and the back door 200, thereby ensuring the sealing performance. The outer surface of the sealing strip 2 is set as a smooth curved surface, so that the sealing strip 2 has only a single-layer contact with the back door 200, avoiding the double-layer contact between the small lip and the bubble tube and the back door 200 in the prior art, reducing the sealing reaction force, thereby reducing the friction. At the same time, a lubricating layer 4 is sprayed on the outer surface of the sealing strip 2. The spraying process of the sealing strip is: extrusion of the sealing strip, plasma treatment of the surface of the spraying area, online spraying, and baking. Spraying only on the outer surface of the sealing strip 2 can reduce the number of spray guns arranged, reduce the amount of coating, save coating costs, and optimize the production line layout. The lubricating layer 4 lubricates the contact between the sealing strip 2 and the back door 200, and can further reduce the friction between the back door 200 and the sealing strip 2, thereby reducing the paint abrasion of the back door 200 during the driving of the vehicle, and protecting the paint surface of the back door 200.

[0035] Example 2

[0036] This embodiment proposes a sealing strip for improving the back door paint grinding. Based on the embodiment 1, in this embodiment, Figure 2 and Figure 3 As shown, the outer surface of the sealing strip 2 is set to be arc-shaped. The arc-shaped outer surface can further ensure the smoothness of the outer surface of the sealing strip 2, and only a single-layer sealing structure is provided between the sealing strip 2 and the back door 200, thereby minimizing the friction between the back door 200 and the sealing strip 2. The inner surface of the sealing strip 2 is provided with at least two weakening grooves 201. The setting of the weakening grooves 201 allows the sealing strip 2 to deform in the desired direction when compressed, thereby avoiding the sealing strip 2 from deforming at will, thereby ensuring the sealing effect. The specific position of the weakening grooves 201 is confirmed by simulation analysis, and the final effect of the simulation analysis is that the sealing strip 2 can fit the shape of the back door 200 after deformation, thereby ensuring a good sealing effect. At the same time, the material of the sealing strip 2 is EPDM sponge glue 300, and the EDPM sponge glue 300 has good shock absorption and buffering properties, which can reduce the impact and noise caused by contact or collision between different materials, and is more conducive to the deformation of the sealing strip 2.

[0037] The material of the lubricating layer 4 is a lubricating and wear-resistant coating, and the material here is preferably a silicon-modified water-soluble polyurethane resin. Compared with fat-soluble coatings, water-soluble coatings are more environmentally friendly and non-toxic. The specific brand of the coating is Fuchuan FC-9081. This coating is a single-component coating used on automotive seals. It has the advantages of smooth feel, high wear resistance, low VOC, pollution resistance, and easy use. It has excellent performance in solving abnormal noises. It can be used alone or mixed with other sealing coatings. Its main component is silicon-modified polyurethane resin. The thickness of the lubricating layer 4 is at least 10 microns. The thickness of the lubricating layer 4 can ensure durability, prevent the lubricating layer 4 from being worn out in a short time, and allow the lubricating layer 4 to be maintained for a long time in normal use of the car.

[0038] Example 3

[0039] This embodiment proposes a sealing strip for improving the back door paint grinding. Based on the first and second embodiments, in this embodiment, Figure 2 and Figure 3 As shown, the clamping part 1 includes a steel belt frame 101 and a rubber strip 102 sleeved on the outer periphery of the steel belt frame 101. The bottom of the rubber strip 102 is provided with an opening 103. The sealing strip 2 is installed on the rubber strip 102 away from the opening 103. The outer side of the rubber strip 102 is provided with a plurality of grooves 121. The clamping force of the clamping part 1 is ensured by the steel belt frame 101. Figure 5 The figure shows a schematic diagram of the structure of the steel belt skeleton 101. The steel belt skeleton 101 uses a steel belt that is cut by rolling shearing, which is more conducive to the deformation of the steel belt. The steel belt here can be made of metal products such as aluminum belts that can ensure the clamping force. The rubber strip 102 is used to prevent the steel belt skeleton 101 from directly contacting the body frame 100 and causing damage to the body frame 100. The rubber strip 102 here uses EPDM dense glue 400, which has better durability. The setting of the groove 121 can weaken the skeleton mark of the steel belt skeleton 101 that is cut by rolling shearing in appearance, and can make the exposed rubber strip 102 more beautiful in appearance.

[0040] A plurality of inner teeth 5 are arranged at intervals on the inner walls on both sides of the rubber strip 102. Here, the inner teeth 5 adopt EDPM dense glue 400 to ensure the strength of the inner teeth 5 and improve the durability of the inner teeth 5. The setting of the inner teeth 5 allows the clamping part 1 to be better clamped on the body frame 100, improves the friction resistance, and prevents the sealing strip from falling off. A soft bulge 6 is provided at the top of the rubber strip 102. The soft bulge 6 adopts EDPM sponge glue 300, which is conducive to the deformation of the soft bulge 6 and better fits and seals the body frame 100. When clamping, there will be a gap between the top of the rubber strip 102 and the body frame 100. The setting of the soft bulge 6 can better fill the gap, thereby effectively avoiding water leakage in the gap.

[0041] A bubble tube 7 is provided at the bottom of the rubber strip 102. The bubble tube 7 can further enhance the sealing effect. Here, the bubble tube 7 is made of EDPM sponge glue 300, which is more conducive to deformation and sealing.

[0042] A lip 8 is provided on one side of the rubber strip 102, and a process rib 9 is provided between the rubber strip 102 and the lip 8. Here, the lip 8 uses EDPM sponge glue 300, which has good shock absorption and cushioning properties, and can reduce the impact and noise caused by contact or collision between different materials. The setting of the lip 8 can block the gap between the sealing strip and the ceiling and the decorative panel; during installation, the setting of the process rib 9 can facilitate the lip 8 to be brought out from the bottom of the decorative panel or ceiling to the top, and the process rib 9 uses EDPM dense glue 400, which is convenient for completely tearing off the process rib 9. The process rib 9 is installed on the inner side of the lip 8. It can avoid the leakage of the steel strip when tearing when it is installed on the outer side of the rubber strip 102. The process rib 9 is in surface contact or line contact with the lip 8. Reducing the contact area can be more conducive to tearing the process rib 9. An anti-crack block 10 is provided on the inner side of the lip 8, and the process rib 9 is installed on the anti-crack block 10. The anti-crack block 10 uses EDPM dense glue 400, and the EDPM dense glue 400 is first connected with the EDPM sponge glue 300 of the lip edge 8, and the connection area is much larger than the connection area between the anti-crack block 10 and the process rib 9. By providing the anti-crack block 10, when the process rib 9 is torn, the splitting point is located between the anti-crack block 10 and the process rib 9, and the anti-crack block 10 still remains on the inner side of the lip edge 8 after tearing, which can prevent the lip edge 8 from being torn.

[0043] Example 4

[0044] The sealing strip for improving the back door paint grinding proposed in this embodiment is different from that in embodiment 3 in that the inner teeth 5 at the bottom end are made of EDPM sponge glue 300, and the inner teeth 5 other than the inner teeth 5 at the bottom end are made of EDPM dense glue 400, and the rest are the same. Figure 2 and Figure 4 As shown, a bubble tube 7 is provided at the bottom of the rubber strip 102, and the bubble tube 7 is integrally formed with the inner teeth 5 at the bottom. The sealing effect can be further enhanced by providing the bubble tube 7. Here, the bubble tube 7 uses EDPM sponge glue 300, which is more conducive to deformation and sealing; the bubble tube 7 and the inner teeth 5 at the bottom are connected to the rubber strip 102 together, that is, the bubble tube 7 and the inner teeth 5 at the bottom are integrally formed using EDPM sponge glue 300, and the inner teeth 5 except the inner teeth at the bottom are all integrally formed using EDPM dense glue 400. After integrally forming, they are connected to the rubber strip 102, which can increase the connection area between the bubble tube 7 and the rubber strip 102 and avoid cracking. At the same time, the use of EDPM sponge glue 300 for the inner teeth 5 at the bottom can be conducive to the deformation of the inner teeth 5 at the bottom, making it easier for the clamping part 1 to be clamped on the vehicle body frame 100.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A sealing strip for improving the back door paint, characterized in that: The invention comprises a clamping part (1) and a sealing strip (2), wherein both ends of the sealing strip (2) are connected to the clamping part (1), a cavity (3) is provided between the sealing strip (2) and the clamping part (1), the outer surface of the sealing strip (2) is provided as a smooth curved surface, and the outer surface of the sealing strip (2) is sprayed with a lubricating layer (4).

2. The sealing strip for improving the back door paint according to claim 1, characterized in that: The outer surface of the sealing strip (2) is configured to be in an arc shape.

3. The sealing strip for improving back door paint according to claim 1, characterized in that: The material of the lubricating layer (4) is silicon-modified water-soluble polyurethane resin; the thickness of the lubricating layer (4) is at least 10 micrometers.

4. The sealing strip for improving back door paint according to claim 1, characterized in that: The inner surface of the sealing strip (2) is provided with at least two weakened grooves (201).

5. The sealing strip for improving the back door paint according to any one of claims 1 to 4, characterized in that: The clamping part (1) comprises a steel belt frame (101) and a rubber strip (102) sleeved on the outer periphery of the steel belt frame (101), an opening (103) is provided at the bottom of the rubber strip (102), the sealing strip (2) is installed on the rubber strip (102) on a side away from the opening (103), and a plurality of grooves (121) are provided on the outer side of the rubber strip (102).

6. The sealing strip for improving the back door paint according to claim 5, characterized in that: The inner walls on both sides of the rubber strip (102) are provided with a plurality of inner teeth (5) at intervals, and the inner top of the rubber strip (102) is provided with a soft convex bump (6).

7. The sealing strip for improving the back door paint according to claim 6, characterized in that: A bubble tube (7) is provided at the bottom of the rubber strip (102), and the bubble tube (7) is integrally formed with the inner teeth (5) at the lower end.

8. The sealing strip for improving the back door paint according to claim 5, characterized in that: A lip edge (8) is provided on one side of the rubber strip (102), and a process rib (9) is provided between the rubber strip (102) and the lip edge (8).

9. The sealing strip for improving the back door paint according to claim 8, characterized in that: The process rib (9) is installed on the inner side surface of the lip edge (8) and is in surface contact or line contact with the lip edge (8).

10. The sealing strip for improving the back door paint according to claim 9, characterized in that: An anti-crack block (10) is provided on the inner side surface of the lip edge (8), and the process rib (9) is installed on the anti-crack block (10).

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