Body sealing expansion sheet and filling structure

Abstract

The present application relates to a kind of car body sealing expansion sheet and filling structure, the expansion sheet, including foamed material body, plastic skeleton body and sheet metal, foamed material body is fixedly connected with plastic skeleton body by injection molding, sheet metal is embedded on plastic skeleton body.The expansion sheet is installed in the cavity surrounded by gutter sheet metal, gutter lower inner plate and side wall, through the galvanized steel sheet metal embedded, the expansion sheet is fixed with gutter sheet metal by welding mode;Then the expansion sheet end on gutter assembly is clamped into the gap of gutter lower inner plate, and welded with rear upright inner plate assembly;So as to realize the firm fixation position between the expansion sheet and two sheet metals.The foamed filling cavity gap can be effectively reduced and isolated by high-temperature baking in paint shop due to high-speed driving of vehicle, and other noises.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile manufacturing, and in particular to a body sealing expansion sheet and filling structure. BACKGROUND

[0002] During driving, noise sources such as engine noise, tire noise, and air noise during driving will be transmitted to the vehicle interior through the side cavity (A / B / C / D pillar cavity), producing cavity resonance noise, thereby affecting the comfort of driving and riding. With increasing emphasis on the comfort of the whole vehicle, NVH quietness as an important performance of the automobile, noise, vibration, and comfort are important characteristics that directly affect the customer's experience of the automobile, and thus the perception of automobile noise is increasingly concerned by the purchasers.

[0003] The expansion sheet is an important means of cavity separation, and is increasingly used to fill the side cavity (A / B / C / D pillar). The expansion sheet product is placed in the small cross-section cavity of the vehicle body, and after electrophoresis and heating expansion, the cavity is closed, used to block the transmission of air noise and structure noise, and plays a sealing, blocking, damping, and noise reduction role.

[0004] The existing expansion sheet fixing method generally directly punches a hole in the sheet metal, and then the expansion sheet is fixed to the vehicle body by clamping. However, due to the limitation of space and installation process, the expansion sheet cannot be smoothly assembled by clamping structure. SUMMARY

[0005] To solve the above problems, the present application provides a body sealing expansion sheet and filling structure, which realizes the fixation of the expansion sheet and the sheet metal of the vehicle body by welding through the pre-embedded metal sheet.

[0006] One of the technical solutions of the present application is: a body sealing expansion sheet, comprising a foamed material body, a plastic framework body, and a metal sheet, the foamed material body is fixedly connected with the plastic framework body by injection molding, and the metal sheet is pre-embedded on the plastic framework body.

[0007] Further optimized technical features include: the plastic framework body comprises a main framework part, the shape of the main framework part matches the filled cavity, the lower part of the main framework part extends to one side to form an elongated second framework part, the height of the end of the second framework part is greater than that of the starting end of the second framework part; a plurality of grooves are arranged on the main framework part, and the grooves are used for embedding the foamed material body; the foamed material body comprises a first foamed material main filling part wrapped on the outer wall of the main framework part.

[0008] The height of the end of the second framework part is greater than that of the starting end of the second framework part, and the end and the starting end can be but are not limited to smooth and continuous.

[0009] The plastic framework body is formed by two parts, the main framework part is used for filling large space cavity (first main cavity) support, and the second framework part is used for filling small space support (second cavity), which is beneficial to the support of the sound insulation foaming material body.

[0010] Further optimized technical features include: the foaming material body further includes a first foaming material main filling part, a second foaming material filling part extending to one side at the lower part of the first foaming material main filling part, and a third foaming material filling part extending upward at the end of the second foaming material filling part.

[0011] The shape of the second foaming material filling part and the third foaming material filling part does not completely correspond to the second framework part, the second foaming material filling part covers the second framework part, and the third foaming material filling part extends upward at the end of the second foaming material filling part. There is no framework structure in this part, and after assembly, this part is located in the cavity formed by the first side plate of the water channel panel and the side plate connected by the lower inner plate of the water channel, and the cavity is relatively narrow, which can reduce the weight of the expansion sheet and achieve good sound insulation effect.

[0012] Further optimized technical features include: the third foaming material filling part is provided with an open slot. The slot can change the mode of the third foaming material filling part and avoid resonance.

[0013] Further optimized technical features include: a polygonal fourth foaming material filling part is arranged at the lower part of the first foaming material main filling part away from the second foaming material filling part, and the fourth foaming material filling part protrudes from the plane of the first foaming material main filling part.

[0014] After assembly, the polygonal fourth foaming material filling part extends out of the lower inner plate of the water channel, and the small space below the lower inner plate of the water channel is soundproofed, improving the filling and sound insulation effect of the expansion sheet; meanwhile, a supporting surface is arranged between the fourth foaming material filling part and the first foaming material main filling part, which can effectively limit and support the fourth foaming material filling part after the fourth foaming material filling part is clamped into the gap on the lower inner plate of the water channel.

[0015] Further optimized technical features include: it is a mounting structure, the expansion sheet is mounted in the cavity surrounded by the water channel panel, the lower inner plate of the water channel, and the side wall, the cavity includes a first main cavity surrounded by the water channel panel, the lower inner plate of the water channel, and the side wall, and a second cavity surrounded by the water channel panel and the lower inner plate of the water channel.

[0016] Further optimized technical features include: the expansion sheet is first welded to the water channel panel by metal sheet to form a water channel assembly, and then the fourth foam filling part at the end of the expansion sheet is clamped into the gap of the lower inner plate of the water channel to form a rear upright column assembly, and the rear upright column assembly is welded with the side wall.

[0017] The second technical solution of the present application is: a vehicle body sealing expansion sheet filling structure in a cavity surrounded by a water channel panel, a lower inner plate of the water channel and a side wall, the cavity including a first main cavity surrounded by the water channel panel, the lower inner plate of the water channel and the side wall, and a second cavity surrounded by the water channel panel and the lower inner plate of the water channel, the first main cavity including a polygon, and the second cavity including an elongated groove shape at a lower part of one side of the first main cavity; the vehicle body sealing expansion sheet is filled in the first main cavity and the second cavity.

[0018] Further optimized technical features include: the water channel panel includes a bottom plate, a first side plate extending upward from one side of the bottom plate, and a second side plate extending upward from the other side of the bottom plate, the bottom plate, the first side plate and the second side plate surrounding an open groove, and a connecting cover plate extending from the upper end of the second side plate for lap joint with the side wall; the connecting cover plate is not coplanar with the second side plate; a pre-embedded metal sheet is arranged at a position corresponding to the connecting cover plate on the main frame, and the pre-embedded metal sheet is connected with the connecting cover plate.

[0019] Further optimized technical features include: the lower inner plate of the water channel is provided with a gap, and the fourth foam filling part of the sealing expansion sheet is clamped in the gap; the edge of the lower inner plate of the water channel adjacent to the gap is provided with a downward flange, and the downward flange is used for welding connection with the side wall, and the fourth foam filling part protrudes from the sealing expansion sheet and corresponds to the downward flange to form sound insulation for the connection part of the downward flange and the side wall.

[0020] As a preferred, the foam body is made of a thermally activated expandable thermoplastic elastomer.

[0021] As a preferred, the plastic skeleton body is made of PA66 material.

[0022] As a preferred, the metal sheet is made of a galvanized steel plate.

[0023] The present application has the following beneficial effects:

[0024] 1. The expansion sheet is formed by double-color injection molding of a thermoplastic elastomer and a PA66 skeleton, and is assembled on the panel in the welding workshop, and is foamed and filled in the gap by high-temperature baking in the paint workshop, which can effectively reduce and isolate the wind noise and other noises generated by high-speed driving of the vehicle.

[0025] 2, the expansion sheet is installed in the cavity surrounded by the water channel sheet metal, the water channel lower inner plate and the side wall, the expansion sheet is fixed with the water channel sheet metal by welding through the galvanized steel sheet metal embedded in the plastic skeleton of the expansion sheet; then the end of the expansion sheet on the water channel assembly is clamped into the gap of the water channel lower inner plate, and is welded with the rear upright inner plate assembly; so that the expansion sheet is fixed between the two sheet metals. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structural schematic diagram of the expansion sheet of the application;

[0027] Figure 2 It is the installation schematic diagram of the expansion sheet of the application;

[0028] Figure 3 It is the explosion diagram of Figure 2

[0029] Figure 4 It is the cavity structure surrounded by the water channel sheet metal, the water channel lower inner plate and the side wall;

[0030] Figure 5 It is the expansion sheet installation area assembly structure on the vehicle body;

[0031] Figure 6 It is the B-B sectional view of Figure 4

[0032] Wherein: 1, expansion sheet; 11, foaming material body; 111, first foaming material main filling part; 112, second foaming material filling part; 113, third foaming material filling part; 1131, opening groove; 114, fourth foaming material filling part; 1141, supporting surface; 12, plastic skeleton body; 121, main skeleton part; 122, second body skeleton part; 123, groove; 13, metal sheet; 2, water channel sheet metal; 21, bottom plate; 22, first side plate; 23, second side plate; 24, connecting cover plate; 3, water channel lower inner plate; 31, gap; 32, flange; 4, side wall. DETAILED DESCRIPTION

[0033] The technical solutions of the application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0034] As Figures 1-6 ​​As shown, the body sealing expansion sheet of the present application comprises a foamed material body 11, a plastic skeleton body 12 and a metal sheet 13, the foamed material body 11 is fixedly connected with the plastic skeleton body 12 through injection molding, and the metal sheet 13 is embedded on the plastic skeleton body 12. In the embodiment, the foamed material body 11 is made of heat-activated expandable thermoplastic elastomer, the plastic skeleton body 12 is made of PA66 material, and the metal sheet 13 is made of galvanized steel plate.

[0035] In combination Figures 2-6 As shown, the expansion sheet 1 of the present application is installed in the cavity 5 surrounded by the water channel sheet metal 2, the water channel lower inner plate 3 and the side wall 4. Due to the limitation of the sheet metal welding process, the water channel sheet metal 2 belongs to one assembly, the water channel inner plate 3 belongs to another assembly, and the two assemblies are welded and then finally welded with the side wall 4. Moreover, the water channel sheet metal 2 belongs to a surface with appearance requirements, and is not suitable for being punched on the sheet metal for fixing the expansion sheet 1. Therefore, the galvanized steel plate metal sheet 13 is embedded in the plastic skeleton 12 of the expansion sheet, and the expansion sheet 1 is fixed with the water channel sheet metal 2 by welding. Then the expansion sheet end clamping pawl 14 of the water channel assembly is clamped into the gap of the water channel lower inner plate 3, and is welded with the rear pillar inner plate assembly. Thus, the expansion sheet 1 is fixed between the two sheet metals.

[0036] The expansion sheet 1 of the present application is first welded with the water channel sheet metal 2 through the metal sheet 11 to form a water channel assembly, then the end of the expansion sheet 1 is clamped into the gap of the water channel lower inner plate 3 to form a rear pillar assembly, and finally the assembly is assembled and welded with the side wall. After the expansion sheet 1 is fixed on the sheet metal part, a fluid cavity is formed between the plastic skeleton body 12 and the sheet metal part, and the galvanized steel plate metal sheet 13 is in contact with the sheet metal part. The above structure forms a fluid cavity between the expansion sheet 1 and the sheet metal part, facilitates the flow of the related pre-treatment tank liquid and electrophoresis tank liquid, avoids the problem of poor electrophoresis between the expansion sheet 1 and the sheet metal part, and increases the body corrosion resistance.

[0037] The expansion sheet 1 of the present application is composed of a heat-activated expandable thermoplastic elastomer 11, a composite skeleton carrier 12 and a galvanized steel plate metal sheet 13. Finally, through high-temperature electrophoresis of paint, the expandable thermoplastic elastomer 11 fills the gap between the vehicle body, and bonds each separate open cavity into a closed structure, thereby blocking the cavity and playing the roles of sealing, blocking, shock absorption and noise reduction.

[0038] The expansion sheet 1 of the present application is first welded with the water channel sheet metal 2 through the metal sheet 13 to form a water channel assembly, then the end of the expansion sheet 1 is clamped into the gap of the water channel lower inner plate 3 to form a rear pillar assembly, and finally the assembly is assembled and welded with the side wall.

[0039] In combination Figure 1As shown, the plastic skeleton body 12 of the present application comprises a main skeleton part 121, which is shaped to match the filled cavity 5, and an elongated second skeleton part 122 extending from the lower part of the main skeleton part 121 to one side, with the end height of the second skeleton part 122 being greater than the starting end; a plurality of grooves 123 are arranged on the upper part of the main skeleton part 121 at intervals, which are used for embedding the foamed material body, so that the two are more closely attached during injection molding; the foamed material body 11 comprises a first foamed material main filling part 111 wrapped on the outer wall of the main skeleton part 121.

[0040] The end height of the second skeleton part 122 is greater than the starting end of the second skeleton part, and the part between the end and the starting end can be, but is not limited to, a smooth and continuous part.

[0041] The plastic skeleton body 12 adopts two parts formed integrally, which are combined Figure 4 As shown, the main skeleton part 121 is shaped to support the foamed material for filling a large space cavity (the first main cavity 51), and the second skeleton part 122 is used to support the foamed material for filling a small space (the second cavity 52), which is beneficial to the support of the soundproof foamed material body 11. The shape of the second skeleton part 121 and the corresponding foamed material can correspond or not correspond, and the foamed material can further extend upwards without the skeleton, which can reduce the weight.

[0042] The foamed material body 11 further comprises an elongated second foamed material filling part 112 extending from the lower part of the first foamed material main filling part 111 to one side, and the second foamed material filling part 112 is wrapped around the second skeleton part 122; the end of the second foamed material filling part 112 extends upwards to form a third foamed material filling part 113; the side walls of the second foamed material filling part 112, the third foamed material filling part 113 and the first foamed material main filling part 111 form an open groove shape.

[0043] The shape of the second foamed material filling part 112 and the third foamed material filling part 113 does not completely correspond to the second skeleton part 122, the second foamed material filling part 112 wraps the second skeleton part 122, and the third foamed material filling part 113 extends upwards at the end of the second foamed material filling part 112 to form a part without a skeleton structure. After assembly, this part is located in the cavity formed by the first side plate 22 of the water channel panel 2 and the side plate connection of the lower inner plate 3 of the water channel, which is relatively narrow, which can reduce the weight of the expansion sheet 1 and achieve good sound insulation effect.

[0044] The third foamed material filling part 113 is provided with an open slot 1131. The open slot 1131 can change the mode of the third foamed material filling part 113 to avoid resonance.

[0045] The lower part of the first foaming material main filling part 111 away from the second foaming material filling part 112 is provided with a polygonal fourth foaming material filling part 114 which protrudes from the plane of the first foaming material main filling part 111.

[0046] After assembly, the polygonal fourth foaming material filling part 114 extends out of the gutter lower inner plate 3, soundproofs the small space at the lower part of the gutter lower inner plate 3, and improves the filling and soundproofing effect of the expansion sheet 1; at the same time, a supporting surface 1141 is arranged between the fourth foaming material filling part 114 and the first foaming material main filling part 111, which can effectively limit and support the fourth foaming material filling part 114 after the fourth foaming material filling part 114 is clamped into the gap 31 on the gutter lower inner plate 3.

[0047] In combination Figure 4 , the expansion sheet 1 is installed in the cavity 5 surrounded by the gutter sheet metal 2, the gutter lower inner plate 3 and the side wall 4, and the cavity 5 includes a first main cavity 51 surrounded by the gutter sheet metal 2, the gutter lower inner plate 3 and the side wall 4, and a second cavity 52 surrounded by the gutter sheet metal 2 and the gutter lower inner plate 3.

[0048] The expansion sheet 1 is first welded to the gutter sheet metal 2 through the metal sheet 13 to form a gutter assembly, then the fourth foaming material filling part 114 at the end of the expansion sheet 1 is clamped into the gap 31 of the gutter lower inner plate 3 to form a rear pillar assembly, and the rear pillar assembly is assembled and welded with the side wall 4.

[0049] The vehicle body sealing expansion sheet filling structure includes a cavity 5 surrounded by the gutter sheet metal 2, the gutter lower inner plate 3 and the side wall 4, and the cavity 5 includes a first main cavity 51 surrounded by the gutter sheet metal 2, the gutter lower inner plate 3 and the side wall 4, and a second cavity 52 surrounded by the gutter sheet metal 2 and the gutter lower inner plate 3, the first main cavity 51 includes a polygonal shape, and the second cavity 52 located at the lower part of one side of the first main cavity 51 includes an elongated groove shape; the vehicle body sealing expansion sheet 1 is filled in the first main cavity 51 and the second cavity 52.

[0050] The gutter sheet metal 2 includes a bottom plate 21, a first side plate 22 extending upward from one side of the bottom plate 21, and a second side plate 23 extending upward from the other side of the bottom plate 21, and the bottom plate 21, the first side plate 22 and the second side plate 23 form an open groove, and the second side plate 23 extends to form a connecting cover plate 24 at the upper end, which is used for lap joint with the side wall 4; the connecting cover plate 24 is not coplanar with the second side plate 23; a pre-buried metal sheet 13 is arranged at a position corresponding to the main framework part 121 of the connecting cover plate 24, and the pre-buried metal sheet 13 is connected with the connecting cover plate 24.

[0051] The lower inner plate 3 of the water channel is provided with a gap 31, the gap 31 is located at the side of the side wall 4, the fourth foaming material filling part 114 of the sealing expansion sheet 1 is clamped in the gap 31; the edge of the lower inner plate 3 close to the gap 31 is provided with a downward flange 32, the downward flange 32 is used for welding connection with the side wall 4, the fourth foaming material filling part 114 protrudes from the sealing expansion sheet 1 and corresponds to the downward flange 32, forming sound insulation for the connecting part of the downward flange 32 and the side wall 4.

[0052] It should be noted that the above technical solutions are exemplary, and the present specification can be embodied in different forms, and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the present disclosure thorough and complete, and will fully convey the scope disclosed by the present specification to those skilled in the art. In addition, the technical solutions of the present application are only limited by the scope of the claims.

[0053] Finally, it should be noted that the above embodiments are only more representative examples of the present application. Obviously, the present application is not limited to the above embodiments, and there can be many variations. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments shall be considered as falling within the protection scope of the present application.

Claims

1. A vehicle body sealing expansion plate, characterized in that: It includes a foam material body, a plastic skeleton body, and a metal sheet. The foam material body is fixedly connected to the plastic skeleton body by injection molding, and the metal sheet is pre-embedded in the plastic skeleton body. The plastic skeleton body includes a main skeleton part whose shape matches the cavity to be filled. The lower part of the main skeleton part extends to one side to form a slender second skeleton part, and the height of the end of the second skeleton part is greater than that of the beginning of the second skeleton part. The main skeleton part is provided with a plurality of grooves at intervals for embedding the foam material body. The foam material body includes a first foam material body filling part covering the outer wall of the main skeleton part.

2. The vehicle body sealing expansion sheet as described in claim 1, characterized in that: The foaming material body also includes a first foaming material main filling part extending to one side to form a slender second foaming material filling part, the second foaming material filling part covering the outer periphery of the second skeleton part; the end of the second foaming material filling part extends upward to form a third foaming material filling part; the second foaming material filling part, the third foaming material filling part and the first foaming material main filling part form an open groove shape.

3. The vehicle body sealing expansion sheet as described in claim 2, characterized in that: The third foaming material filling section is provided with an open groove.

4. The vehicle body sealing expansion sheet as described in claim 2, characterized in that: A polygonal fourth foam filling part is provided at the lower part of the first foam main filling part, which is far away from the second foam filling part. The fourth foam filling part protrudes from the plane of the first foam main filling part.

5. The vehicle body sealing expansion sheet according to claim 1, characterized in that: The expansion plate is installed in the cavity formed by the water trough sheet metal, the water trough lower inner plate and the side wall. The cavity includes a first main cavity enclosed by the water trough sheet metal, the water trough lower inner plate and the side wall, and a second cavity enclosed by the water trough sheet metal and the water trough lower inner plate.

6. The vehicle body sealing expansion sheet according to claim 5, characterized in that: The expansion sheet is first welded to the sheet metal of the water channel through a metal sheet to form the water channel assembly. Then, the fourth foaming material filling part at the end of the expansion sheet is inserted into the notch of the lower inner plate of the water channel.

7. A vehicle body sealing expansion pad filling structure, characterized in that: The device includes a cavity formed by a water channel sheet, a lower water channel plate, and a side panel. The cavity includes a first main cavity enclosed by the water channel sheet, the lower water channel plate, and the side panel, and a second cavity enclosed by the water channel sheet and the lower water channel plate. The first main cavity is polygonal, and the second cavity, located on the lower part of one side of the first main cavity, includes an elongated groove shape. The vehicle body sealing expansion sheet as described in any one of claims 1 to 6 fills the first main cavity and the second cavity.

8. The vehicle body sealing expansion sheet filling structure according to claim 7, characterized in that: The water channel sheet metal includes a base plate, one side of which extends upward to form a first side plate, and the other side of which extends upward to form a second side plate. The base plate, the first side plate, and the second side plate form an open groove. The upper end of the second side plate extends to form a connecting sealing plate that overlaps with the side plate. The connecting sealing plate and the second side plate are not coplanar. A pre-embedded metal sheet is set at a position in the main frame part corresponding to the connecting sealing plate, and the pre-embedded metal sheet is connected to the connecting sealing plate.

9. The vehicle body sealing expansion sheet filling structure according to claim 7, characterized in that: The lower inner plate of the water trough has a notch located on the side wall, and the fourth foaming material filling part of the sealing expansion sheet is stuck in the notch.

Images