Connecting structure for internal support and exterior trimming part of automobile

Abstract

The utility model relates to the field of connection of an internal support and an external decorative part of an automobile, in particular to a connecting structure of the internal support and the external decorative part of the automobile, which comprises a front protective skin, a left plastic support, a right plastic support and a middle plastic support arranged between the left plastic support and the right plastic support are welded and fixed on the inner side of the front protective skin. The left side plastic support, the right side plastic support and the middle plastic support are each provided with a plurality of welding parts used for being connected with the front protective skin, the welding parts make contact with the front protective skin, the left side plastic support, the right side plastic support and the middle plastic support are each provided with a buckle, and at least two welding parts are arranged on the periphery of each buckle. According to the connecting structure for the internal support and the exterior trimming part of the automobile, the welding support is designed into a split type support from an existing integral type support, injection molding deformation of parts is reduced, and the puncture welding firmness between the support and the front protective skin is effectively guaranteed; in order to reduce deformation, the plastic welding bracket is divided into three brackets from one bracket, and the three brackets share one set of mold, so that the appearance size of the mold is reduced, and the cost of the mold can also be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile interior support and outer trim part connection, especially to a kind of automobile interior support and outer trim part connection structure. BACKGROUND

[0002] The existing automobile interior support generally adopts integral type, and it is difficult to demold, the manufacturing cost of mould is relatively high, and the volume is relatively large. Injection molding deformation is more serious, the interior support and the skin cannot be completely matched, and the product has dimensional error after the interior support and the skin are welded.

[0003] Therefore, it is necessary to provide an automobile interior support and outer trim part connection structure to solve the above technical problems. CONTENT OF UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides an automobile interior support and outer trim part connection structure.

[0005] The utility model provides a kind of automobile interior support and outer trim part connection structure, including front protective skin, the inner side welding of front protective skin is fixed with left side plastic support, right side plastic support and the middle plastic support being arranged between left side plastic support, right side plastic support, the left side plastic support, right side plastic support and middle plastic support are all equipped with a plurality of welding parts for being connected with front protective skin, and welding part is in contact with front protective skin, the left side plastic support, right side plastic support and middle plastic support are all equipped with buckle, and at least two welding parts are provided around buckle, the both ends of welding part are welding point, and welding part is arranged inwards;

[0006] Positioning groove is provided on the front protective skin, one end of the middle plastic support is arranged in the positioning groove, the middle plastic support and the front protective skin are provided with stress avoidance gap, and the end of the middle plastic support away from the positioning groove is provided with pry gap between the front protective skin.

[0007] Preferably, when the front protective skin, left side plastic support, right side plastic support and middle plastic support are PP material, the welding area thickness of front protective skin and welding part is 3.2-3.5 mm, and the welding part thickness is 1.2-1.5 mm.

[0008] Preferably, when the front protective skin, left side plastic support, right side plastic support and middle plastic support are PC / ABS material, the welding area thickness of front protective skin and welding part is.~.mm, and the welding part thickness is 1.2-1.5 mm.

[0009] Preferably, before the welding part and the front protective skin are not welded, the welding surface curvature change of the welding part is within 0.2 mm.

[0010] Preferably, the welded part is square, with a length of 30~35mm and a width of 16mm~20mm.

[0011] Preferably, a reinforcing structure is provided around the welded portion.

[0012] Preferably, the reinforcing structure is a reinforcing rib or a flange, and the width of the reinforcing structure is 1.5~2.0mm and the height is 2~5mm.

[0013] Preferably, the edges of the left plastic bracket, the right plastic bracket, and the middle plastic bracket are all provided with flanges.

[0014] Compared with related technologies, the present invention provides the following beneficial effects:

[0015] With the rapid development of new energy vehicles, the design of the connection structure between the bracket and the outer skin is limited. Ultrasonic puncture welding technology, through precise puncture action and efficient welding process, achieves a strong connection between different materials, significantly improving the overall performance of the product. Compared with traditional welding methods, puncture welding technology has higher welding quality and more stable welding effect, effectively reducing the defect rate and defective product rate in the welding process.

[0016] In terms of cost control, piercing welding technology achieves significant savings by reducing material waste and energy consumption. Compared to traditional welding methods, piercing welding technology can more precisely control the weld depth and width, reducing unnecessary material consumption. Furthermore, by optimizing energy input during the welding process, piercing welding technology also reduces energy consumption, further lowering production costs. According to relevant data, automobile manufacturers using piercing welding technology have achieved savings of over 3% in both material and energy costs.

[0017] The welding bracket is designed from the existing integral bracket to a split bracket to reduce the deformation of the parts during injection molding and effectively ensure the piercing weld strength between the bracket and the front bumper skin; in order to reduce deformation, the plastic welding bracket is split from one bracket into three brackets, and the three brackets share a set of molds. The mold size is reduced, which can also reduce mold costs, avoid excessive deformation during injection molding, and ensure product quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the AA section;

[0020] Figure 3 This is a schematic diagram of the split internal support structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the left-side plastic bracket structure of this utility model;

[0022] Figure 5 A schematic diagram of the existing product structure;

[0023] Figure 6 This is a schematic diagram of the existing internal support structure.

[0024] The following are labeled in the diagram: 1. Front bumper cover; 2. Left plastic bracket; 3. Right plastic bracket; 4. Middle plastic bracket; 5. Welded section; 6. Reinforcing structure; 7. Buckle. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Please refer to the following: Figures 1 to 6 A connection structure between an automotive interior bracket and an exterior trim component includes a front bumper cover 1. A left plastic bracket 2, a right plastic bracket 3, and a middle plastic bracket 4 positioned between the left and right plastic brackets 2 and 3 are welded and fixed to the inner side of the front bumper cover 1. The welding bracket is designed as a split bracket instead of the existing integral bracket to reduce injection molding deformation of the parts and effectively ensure the piercing weld strength between the bracket and the front bumper cover. To reduce deformation, the plastic welding bracket is split from one bracket into three brackets, with the three brackets sharing a single mold. This reduces the mold's external dimensions and lowers mold costs.

[0027] The left plastic bracket 2, right plastic bracket 3, and middle plastic bracket 4 are each equipped with several welding parts 5 for connecting to the front bumper skin 1, and the welding parts 5 are in contact with the front bumper skin 1. Each of the left plastic bracket 2, right plastic bracket 3, and middle plastic bracket 4 is equipped with a buckle 7, and at least two welding parts 5 are provided around the buckle 7. The location design of the welding area is a key element in the puncture welding structure. The location of the weld points should ensure that they can effectively disperse and transfer force when subjected to external force, avoiding stress concentration and breakage. The spacing and arrangement of the weld points are also factors that need to be considered in the puncture welding design. Too small a spacing may lead to an overly concentrated welding area, increasing welding difficulty and the risk of deformation; while too large a spacing may reduce the connection strength and affect the overall performance of the bumper. Therefore, during the design process, the spacing and arrangement of the weld points should be reasonably determined according to the specific structural requirements, material properties, and process conditions.

[0028] The two ends of the welding part 5 are welding points, which indicate the welding head. The welding part 5 is recessed to facilitate the location of the welding points.

[0029] The front bumper cover 1 is provided with a positioning groove, and one end of the middle plastic bracket 4 is set in the positioning groove. The middle plastic bracket 4 and the front bumper cover 1 are provided with a stress avoidance gap to release stress and prevent detachment during welding and use. The end of the middle plastic bracket 4 away from the positioning groove is provided with an easy pry gap between it and the front bumper cover 1 for easy replacement when damaged.

[0030] For parts that require significant stress, such as the center support bracket of the front bumper, the spacing between weld points should be 60-120mm; for other parts, the spacing should be 120-150mm.

[0031] When the front bumper skin 1, left plastic bracket 2, right plastic bracket 3, and middle plastic bracket 4 are made of PP material, the thickness of the welding area between the front bumper skin 1 and the welding part 5 is 3.2~3.5 mm, and the thickness of the welding part 5 is 1.2~1.5 mm. When the front bumper skin 1, left plastic bracket 2, right plastic bracket 3, and middle plastic bracket 4 are made of PC / ABS material, the thickness of the welding area between the front bumper skin 1 and the welding part 5 is 3.0~3.5 mm, and the thickness of the welding part 5 is 1.2-1.5 mm. (Too thin a material may result in insufficient welding strength, while too thick a material will increase welding difficulty and cost. Therefore, during the design process, the material thickness of the front bumper skin 1 and its left plastic bracket 2, right plastic bracket 3, and middle plastic bracket 4 should be reasonably selected according to the specific structural requirements, material properties, and process conditions. To ensure the versatility of the welding head of the welding robot, the welding mark and pull-out force should be balanced as much as possible through the welding head design and bracket structure design.)

[0032] Before the welded part 5 is welded to the front cover skin 1, the curvature change of the welded surface of the welded part 5 is within 0.2mm (the welded surface should be flat, smooth, and free of oil, dust, and other impurities to ensure weld quality. Simultaneously, the shape and size of the welded surface should match the welding head to ensure smooth welding. During the design process, the welded surface should be fully considered and planned to ensure welding quality and efficiency).

[0033] When welding, the following points should be noted: ensure a tight fit between the welded part and the base material; the welding direction of the welding head should be perpendicular to the welding surface; the curvature change of the welding surface should be within 0.2mm, otherwise the welding head needs to be designed to conform to the shape, etc.

[0034] The welded part 5 is square, with a length of 30~35mm and a width of 16mm~20mm.

[0035] A reinforcing structure 6 is provided around the welded part 5.

[0036] The reinforcing structure 6 is a reinforcing rib or a flange, and the width of the reinforcing structure 6 is 1.5~2.0mm and the height is 2~5mm.

[0037] The edges of the left plastic bracket 2, the right plastic bracket 3, and the middle plastic bracket 4 are all provided with flanges to ensure strength and stability.

[0038] A set of robotic piercing and welding equipment can achieve welding of parts for different projects by simply changing the fixture and switching the welding process parameters.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A connection structure between an internal automotive bracket and an external trim component, characterized in that: The front bumper includes a front bumper cover (1). The front bumper cover (1) has a left plastic bracket (2), a right plastic bracket (3), and a middle plastic bracket (4) between the left plastic bracket (2) and the right plastic bracket (3) welded to its inner side. The left plastic bracket (2), the right plastic bracket (3), and the middle plastic bracket (4) are each provided with a number of welding parts (5) for connecting with the front bumper cover (1), and the welding parts (5) are in contact with the front bumper cover (1). The left plastic bracket (2), the right plastic bracket (3), and the middle plastic bracket (4) are each provided with a buckle (7), and at least two welding parts (5) are provided around the buckle (7). The two ends of the welding parts (5) are welding points, and the welding parts (5) are recessed. The front bumper cover (1) is provided with a positioning groove, one end of the middle plastic bracket (4) is set in the positioning groove, the middle plastic bracket (4) and the front bumper cover (1) are provided with a stress avoidance gap, and the end of the middle plastic bracket (4) away from the positioning groove is provided with an easy pry gap between it and the front bumper cover (1).

2. The connection structure between an automotive interior bracket and an exterior trim component according to claim 1, characterized in that, When the front bumper skin (1), left plastic bracket (2), right plastic bracket (3) and middle plastic bracket (4) are made of PP material, the thickness of the welding area between the front bumper skin (1) and the welding part (5) is 3.2~3.5 mm, and the thickness of the welding part (5) is 1.2~1.5 mm.

3. The connection structure between an automotive interior bracket and an exterior trim component according to claim 1, characterized in that, When the front bumper skin (1), left plastic bracket (2), right plastic bracket (3) and middle plastic bracket (4) are made of PC / ABS material, the thickness of the welding area between the front bumper skin (1) and the welding part (5) is 3.0~3.5mm, and the thickness of the welding part (5) is 1.2-1.5mm.

4. The connection structure between an automotive interior bracket and an exterior trim component according to claim 1, characterized in that, Before the welded part (5) is welded to the front cover skin (1), the curvature of the welded surface of the welded part (5) changes within 0.2 mm.

5. The connection structure between an automotive interior bracket and an exterior trim component according to claim 1, characterized in that, The welded part (5) is square, with a length of 30~35mm and a width of 16mm~20mm.

6. The connection structure between an automotive interior bracket and an exterior trim component according to claim 1, characterized in that, A reinforcing structure (6) is provided around the welded part (5).

7. The connection structure between an automotive interior bracket and an exterior trim component according to claim 6, characterized in that, The reinforcing structure (6) is a reinforcing rib or a flange, and the width of the reinforcing structure (6) is 1.5~2.0mm and the height is 2~5mm.

8. The connection structure between an automotive interior bracket and an exterior trim component according to claim 1, characterized in that, The edges of the left plastic bracket (2), right plastic bracket (3) and middle plastic bracket (4) are all provided with flanges.

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