A high-rise box and its fiberglass foaming process for embedded parts structure
By using blind hole press-fit nuts and new pre-embedded sheet metal parts in the fiberglass foaming process of the elevated box, the problem of the welding nuts of the pre-embedded parts being blocked is solved, thus achieving efficient production and simplified quality control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 常州新泉汽车零部件有限公司
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-26
AI Technical Summary
In the existing process of fiberglass foaming for elevated boxes, the welding nuts of the embedded parts are easily blocked by the foaming material, which leads to the need to add a tapping process later, which consumes time and increases the risk of quality control.
The blind hole press-fit nut is integrally formed with a new type of pre-embedded sheet metal part to form a new type of pre-embedded sheet metal assembly, which avoids the foam material from entering the nut hole and eliminates the tapping process.
Improve production efficiency, reduce quality control risks, lower production costs, and achieve mass production.
Smart Images
Figure CN224276999U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive overhead box technology, and in particular to the overhead box and its fiberglass foaming process embedded component structure. Background Technology
[0002] Heavy-duty trucks, as a production and transportation tool, serve logistics and other fields, with practicality and economy as their core considerations. Drivers and passengers spend long periods working and living inside the cab, making the overhead storage box a crucial component of heavy-duty trucks, serving a significant storage function. This necessitates higher reliability for the overhead storage box. Among these, overhead storage boxes made with long-fiberglass foam are widely used in the industry due to their good integrity, high strength, and stable matching. However, due to limitations in the manufacturing process, welding nuts on embedded parts are filled and sealed with foam material during production, requiring an additional tapping process for the assembly of various accessories and bolts. The large number of embedded parts consumes significant time and labor, increasing the risk of compromised quality control. Utility Model Content
[0003] In view of the practicality and shortcomings of the existing technology, the purpose of this utility model is to provide an elevated box and its fiberglass foaming process embedded part structure to solve the problem.
[0004] The technical solution adopted in this utility model is as follows:
[0005] An elevated box and its fiberglass foaming process embedded component structure include an elevated box body, a novel embedded sheet metal part and a nut for fixed connection, characterized in that the novel embedded sheet metal part and the nut for fixed connection constitute a novel embedded sheet metal assembly, the nut is a blind hole nut hole, and the novel embedded sheet metal assembly is fixed to the elevated box body as a whole.
[0006] The elevated box and its fiberglass foaming process embedded component structure are characterized in that the nut is a blind hole press-fit nut.
[0007] The elevated box and its fiberglass foaming process embedded component structure are characterized in that the distance between the blind hole press-fit nut and the surface of the elevated box body is at least 3mm.
[0008] The elevated box and its fiberglass foaming process embedded part structure are characterized in that the thickness of the blind hole press-fit nut is 1.5mm-2mm.
[0009] The elevated box and its fiberglass foaming process embedded part structure are characterized in that the thickness of the new embedded sheet metal part is 1mm-1.5mm.
[0010] This utility model of an elevated box and its fiberglass foaming process embedded part structure is novel in concept, scientific in design, and reasonable and simple in structure, which is conducive to mass production. It eliminates the tapping process, is safe and reliable, and has ideal effect, which greatly improves production efficiency, reduces the quality control risks of each process in the production process, and has low manufacturing cost. Attached Figure Description
[0011] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.
[0012] Figure 1 A schematic diagram of the overall structure of the existing long glass fiber foaming process;
[0013] Figure 2 for Figure 1 A schematic diagram of the AA-direction section;
[0014] Figure 3 This is a schematic diagram of the overall structure of the long glass fiber foaming process of this utility model;
[0015] Figure 4 for Figure 3 DD-direction sectional view;
[0016] Figure 5 This is a schematic diagram of the embedded part structure for the long glass fiber foaming process of this utility model;
[0017] Figure 6 for Figure 5 A schematic cross-sectional view of the FF direction;
[0018] In the diagram: 1-elevated box body, 2-existing technology embedded sheet metal assembly, 4-projection weld nut, 5-new embedded sheet metal part, 6-blind hole press-fit nut.
[0019] M is the upper mold, a is the distance between the blind hole rivet nut and the surface of the elevated box body, b is the thread depth of the blind hole rivet nut, c is the thread diameter of the blind hole rivet nut, d is the thickness of the blind hole rivet nut, and e is the thickness of the new type of pre-embedded sheet metal part. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described below are merely illustrative of this utility model. Key terms that need attention in these descriptions, including "pre-embedded" and "blind hole press-fit nut," are only for the purpose of facilitating and simplifying the description of this utility model, and therefore should not be construed as limiting this utility model.
[0021] like Figure 1-2As shown, the existing pre-embedded sheet metal assembly 2 includes pre-embedded sheet metal and projection weld nut 4. In the structure where they are fixedly connected by projection welding, since the projection weld nut 4 is a through hole, during foaming, even if the upper surface of the sheet metal part is in contact with the upper mold M shown by the dotted line, the foaming material will still flow in from the through hole of the projection weld nut 4, causing the nut hole to be filled and blocked, so it is necessary to tap it separately.
[0022] This invention uses a blind hole nut hole as the pre-embedded sheet metal part 5 and its fixed connection nut. The pre-embedded sheet metal part 5 and its fixed connection nut constitute a new pre-embedded sheet metal assembly. Through foaming of the elevated box body 1, the new pre-embedded sheet metal assembly is fixed to the elevated box body 1 as a whole. Because the nut hole is a blind hole, it prevents the foaming material from flowing into the nut hole and causing it to be filled and blocked.
[0023] See Figures 3-6 As shown, the specific implementation steps of this embodiment are as follows:
[0024] 1. Rivet the blind hole press-fit nut 6 to the embedded sheet metal part 5 of this new type to form the embedded sheet metal assembly of this new type;
[0025] 2. Place the new type of pre-embedded sheet metal assembly into the upper mold of the high-rise box body foaming mold, and the five sides of the new type of pre-embedded sheet metal part are attached to the upper mold;
[0026] 3. Pour the long glass fiber foam material, close the mold, and open the mold to remove the parts after the process time is reached.
[0027] During the foaming process of the elevated box body, the new type of pre-embedded sheet metal assembly includes a blind hole rivet nut 6 and a new type of pre-embedded sheet metal part 5 that are fixedly connected. The blind hole rivet nut 6 has a blind hole on one side, and during foaming, the new type of pre-embedded sheet metal part 5 serves as a pre-embedded part. During foaming, its upper surface fits seamlessly with the upper mold M shown by the dotted line, and the foaming material will not flow into the hole of the blind hole rivet nut. Therefore, bolts can be directly installed during subsequent assembly.
[0028] Based on actual usage conditions, theoretical analysis, and practical application experience data, this utility model stipulates that the distance 'a' between the blind hole press-fit nut and the surface of the elevated box body should be at least 3mm to prevent the embedded part from penetrating the product surface; the thread depth 'b' of the blind hole press-fit nut should be determined according to the actual bolt length, and an appropriate safety distance should be reserved between the bolt and the thread hole of the blind hole press-fit nut; the cylinder thread diameter 'c' of the blind hole press-fit nut should be determined according to the actual bolt diameter; the thickness 'd' of the blind hole press-fit nut should be determined according to the actual specifications of each manufacturer, generally 1.5-2mm; and the thickness 'e' of the new embedded sheet metal part is generally 1-1.5mm.
[0029] Based on the above, the structure of the elevated box and its fiberglass foaming process embedded parts of this utility model is simple and reliable, which is conducive to mass production. It eliminates the tapping process, greatly improves production efficiency, and reduces the quality control risks of each process in the production process.
[0030] The above description is only a general embodiment of this utility model. For those skilled in the art, there are various other embodiments with modifications and variations, which will not be elaborated here. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model are included within the protection scope claimed by this utility model.
Claims
1. An overhead tank and its fiberglass foaming process embedded part structure, comprising an overhead tank body (1), and a new type of embedded sheet metal part (5) and its fixedly connected nut, characterized in that, The new type of embedded sheet metal part (5) and its fixedly connected nut constitute a new type of embedded sheet metal assembly. The nut is a blind hole nut hole. The new type of embedded sheet metal assembly is fixed as one piece with the elevated box body (1).
2. The overhead tank and its fiberglass foamed-in-place insert structure of claim 1, wherein, The nut is a blind hole press-fit nut (6).
3. The overhead tank of claim 2, and its fiberglass foamed process pre-embedded component structure, wherein, The distance (a) between the blind hole press-fit nut and the surface of the elevated box body is at least 3 mm.
4. The overhead tank of claim 2, and its fiberglass foamed process pre-embedded component structure, wherein, The thickness (d) of the blind hole press-fit nut is 1.5mm-2mm.
5. The overhead tank of claim 1 and its fiberglass foamed-in-place insert structure, wherein, The thickness (e) of the new type of embedded sheet metal part is 1mm-1.5mm.