Seamless wire epdm steering wheel structure

Abstract

The utility model relates to the technical field of steering wheel structure, especially a seamless line EPDM steering wheel structure, including lower support spare assembly, upper support spare assembly and the steering wheel framework between lower support spare assembly and upper support spare assembly, upper support spare assembly includes injection support spare, bubble cotton and leather, bubble cotton is pasted in the outside surface of injection support spare, leather is pasted in bubble cotton outside, and the structure of upper support spare assembly is same with lower support spare assembly, the injection support spare of lower support spare assembly is fixed with the steering wheel framework through screw, and upper support spare assembly is fixed with the steering wheel framework and is clamped, the utility model cancels the artificial sewing process to reach realizes the automatic production of steering wheel, improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of automobile steering wheels, and in particular to a seamless EPDM steering wheel structure. Background Technology

[0002] The conventional structure for automotive steering wheel rims involves bonding leather to a polyurethane foam surface and securing it with sewing thread. Since the sewing and securing is primarily done manually, it's difficult to automate the process, resulting in low production efficiency. This paper proposes a press-fit steering wheel rim structure to enable automated steering wheel production. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a seamless EPDM steering wheel structure that replaces the polyurethane foam structure and the sewing thread tightening structure.

[0004] On the one hand, the seamless two-color injection molded automotive steering wheel structure provided by this utility model adopts the following technical solution: A seamless EPDM steering wheel structure includes a lower support assembly, an upper support assembly, and a steering wheel frame located between the lower and upper support assemblies. The upper support assembly includes an injection-molded support, foam, and leather. The foam is adhered to the outer surface of the injection-molded support, and the leather is adhered to the outer surface of the foam. The upper support assembly has the same structure as the lower support assembly. The injection-molded support of the lower support assembly is fixed to the steering wheel frame with screws, and the upper support assembly is snap-fitted to the steering wheel frame.

[0005] Optionally, the injection-molded support of the lower support assembly is fixed with multiple first barbs, and the injection-molded support of the upper support assembly is fixed with multiple fixing blocks, each fixing block corresponding to a first barb, and the first barb hooks onto the corresponding fixing block.

[0006] Optionally, the first barbs are arranged in pairs, with the two first barbs of one pair facing back to back, and the two first barbs of one pair are engaged between two fixed blocks.

[0007] Optionally, multiple second barbs are fixed on the injection-molded support of the upper support assembly, and multiple connection holes are provided on the steering wheel frame. Each connection hole corresponds to a second barb, and the second barb passes through the corresponding connection hole and hooks onto the bottom of the steering wheel frame.

[0008] Optionally, the foam material is EPDM.

[0009] On the other hand, this utility model also discloses a construction process for a seamless EPDM steering wheel structure, including the following steps: S1. The upper support assembly and the lower support assembly are injection molded using injection molding process. Then the foam is cut and pasted onto the outer surface of the injection molded support. The first edge of the foam is required to be flush with the inner wall of the groove of the injection molded support, and the second edge of the foam is required to be flush with the edge of the parting surface of the injection molded support. S2. Glue the cut leather to the outside of the foam. S3. Secure the injection-molded support of the lower support assembly to the steering wheel frame with screws; S4. Press the upper support assembly onto the lower support frame assembly. The second barb on the injection-molded support of the upper support assembly passes through the connecting hole of the steering wheel frame and hooks onto the bottom of the steering wheel frame. The first barb on the injection-molded support of the lower support assembly hooks onto the fixing block, thus forming the steering wheel cover assembly.

[0010] Compared with the prior art, the present invention has the following technical effects: This utility model's steering wheel structure uses an EPDM foam and leather structure bonded to the surface of the support component. The leather stitching and tightening method is eliminated; instead, a hook-and-loop fastening method is used on the support component, thereby improving the production efficiency of the steering wheel structure. Attached Figure Description

[0011] Figure 1 This is a perspective view of the overall structure of this utility model; Figure 2 This is a perspective view of the steering wheel frame in this utility model; Figure 3 This is a schematic diagram of the injection-molded support component in the lower support assembly of this utility model; Figure 4 This is a schematic diagram of the injection-molded support component and foam in the lower support assembly of this utility model; Figure 5 This is a schematic diagram showing that the edge of the first foam is flush with the inner wall of the groove, and the edge of the second foam is flush with the edge of the parting surface in the lower support assembly of this utility model. Figure 6 This is a top view of the lower support assembly in this utility model; Figure 7 This is the book Figure 6 Schematic diagram of the cross-sectional structure of CC; Figure 8 This is a schematic diagram of the lower support assembly and steering wheel frame after installation in this utility model; Figure 9 This is a perspective view of the upper support assembly in this utility model; Figure 10 This is a schematic diagram of the fixing block and the second barb in the lower support assembly of this utility model; Figure 11 This is a top view of the overall structure of the steering wheel in this utility model; Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure of DD; Figure 13 yes Figure 11 Schematic diagram of the cross-sectional structure of the EE; Figure 14 yes Figure 11 Schematic diagram of the cross-sectional structure of FF; Explanation of reference numerals in the attached drawings: 1. Lower support assembly; 11. Injection molded support; 12. Foam; 13. Leather; 14. Edge of the first foam; 15. Inner wall of the leather groove; 16. Edge of the second foam; 17. Edge of the parting surface; 2. Upper support assembly; 3. Steering wheel frame; 31. Connecting hole; 4. Screw; 5. First barb; 6. Fixing block; 7. Second barb. Detailed Implementation

[0012] The following is in conjunction with the appendix Figure 1 - Appendix Figure 14 The present invention will be described in further detail below.

[0013] Reference Figures 1-14 The present invention discloses a seamless EPDM steering wheel structure, including a lower support assembly 1, an upper support assembly 2, and a steering wheel frame 3, wherein the steering wheel frame 3 is located between the lower support assembly 1 and the upper support assembly 2.

[0014] The lower support assembly 1 includes an injection-molded support 11, foam 12, and leather 13. The foam 12 is EPDM foam. The material of the foam 12 is not limited to EPDM foam, but can also be polyurethane foam (PU), polyethylene foam (PE), etc., and can be selected and replaced according to customer needs and material properties.

[0015] Foam 12 is glued to the outer surface of the injection-molded support 11. The first foam edge 14 of foam 12 is flush with the inner wall 15 of the groove of the injection-molded support 11, and the second foam edge 16 of foam 12 is flush with the parting surface edge 17 of the injection-molded support 11. Leather 13 is glued to the outside of foam 12. The structure of the upper support assembly 2 is the same as that of the lower support assembly 1.

[0016] Multiple screws 4 are provided on the steering wheel frame 3. The injection-molded support 11 of the lower support assembly 1 has threaded holes. The screws 4 pass through the steering wheel frame 3 and are threadedly connected and fixed to the injection-molded support 11. Multiple first barbs 5 are fixed on the injection-molded support 11 of the lower support assembly 1, and multiple fixing blocks 6 are fixed on the injection-molded support 11 of the upper support assembly 2. Each fixing block 6 corresponds to one first barb 5, and the first barb 5 hooks onto the fixing block 6, thereby achieving a snap-fit ​​fixation between the injection-molded support 11 of the lower support assembly 1 and the injection-molded support 11 of the upper support assembly 2. Figure 5 As shown, the first barbs 5 are arranged in pairs, with the two first barbs 5 in one pair facing back to back, and the two first barbs 5 in one pair are engaged between the two fixing blocks 6.

[0017] Multiple second barbs 7 are fixed on the injection-molded support 11 of the upper support assembly 2. Multiple connecting holes 31 are provided on the steering wheel frame 3. Each connecting hole 31 corresponds to a second barb 7. The second barb 7 passes through the corresponding connecting hole 31 and hooks onto the bottom of the steering wheel frame 3, thereby snapping and fixing the injection-molded support 11 of the upper support assembly 2 to the steering wheel frame 3.

[0018] The steering wheel structure of this utility model adopts a structure in which EPDM foam and leather 13 are bonded to the surface of the support component. The fastening method of the leather 13 by stitching is eliminated, and a fastening method of snapping on the support component with barbs is adopted, thereby improving the production efficiency of the steering wheel structure.

[0019] This utility model also discloses a construction process for a seamless EPDM steering wheel structure, including the following steps: S1. The injection molding process is used to process the injection molded support 11 of the upper support assembly 2 and the lower support assembly 1. Then, the foam 12 is placed on a cutting machine and cut using a corresponding die. The cut molded foam 12 is then glued to the outer surface of the injection molded support 11. The first foam edge 14 of the foam 12 is required to be flush with the inner wall 15 of the groove of the injection molded support 11, and the second foam edge 16 of the foam 12 is required to be flush with the parting surface edge 17 of the injection molded support 11.

[0020] S2. Glue the cut leather 13 to the outside of the foam 12. The leather 13 should completely cover the foam 12. Then, glue the leather 13 inward along the parting line of the injection support 11, ensuring that the parting line surface is completely covered.

[0021] S3. Use screws 4 to fix the injection-molded support 11 of the lower support assembly 1 to the steering wheel frame 3. The lower support assembly 1 and the steering wheel frame 3 are collectively defined as the lower support assembly and frame assembly.

[0022] S4. Press the upper support assembly 2 onto the lower support assembly and frame assembly. The diagram after assembly is shown below. Figure 11 As shown.

[0023] The second barb 7 on the injection-molded support 11 of the upper support assembly 2 passes through the connecting hole 31 of the steering wheel frame 3 and hooks onto the bottom of the steering wheel frame 3 (e.g., Figure 13 As shown), the first barb 5 on the injection-molded support 11 of the lower support assembly 1 hooks onto the fixing block 6 (as shown). Figure 12 As shown in the figure, this ultimately forms the steering wheel wrapping assembly.

[0024] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, principle, and materials of this utility model should be included within the scope of protection of this utility model.

Claims

1. A seamless EPDM steering wheel structure, characterized in that, The assembly includes a lower support assembly (1), an upper support assembly (2), and a steering wheel frame (3) located between the lower support assembly (1) and the upper support assembly (2). The upper support assembly (1) includes an injection-molded support (11), foam (12), and leather (13). The foam (12) is pasted on the outer surface of the injection-molded support (11), and the leather (13) is pasted on the outer side of the foam (12). The upper support assembly (2) has the same structure as the lower support assembly (1). The injection-molded support (11) of the lower support assembly (1) is fixed to the steering wheel frame (3) by screws (4), and the upper support assembly (2) is snapped to the steering wheel frame (3).

2. The seamless EPDM steering wheel structure according to claim 1, characterized in that, Multiple first barbs (5) are fixed on the injection-molded support (11) of the lower support assembly (1), and multiple fixing blocks (6) are fixed on the injection-molded support (11) of the upper support assembly (2). Each fixing block (6) corresponds to a first barb (5), and the first barb (5) hooks onto the corresponding fixing block (6).

3. The seamless EPDM steering wheel structure according to claim 2, characterized in that, The first barb (5) is in a group of two, and the two first barbs (5) of the group are set back to back. The two first barbs (5) of the group are engaged between two fixed blocks (6).

4. The seamless EPDM steering wheel structure according to claim 1 or 2, characterized in that, Multiple second barbs (7) are fixed on the injection-molded support (11) of the upper support assembly (2). Multiple connecting holes (31) are provided on the steering wheel frame (3). Each connecting hole (31) corresponds to a second barb (7). The second barb (7) passes through the corresponding connecting hole (31) and hooks onto the bottom of the steering wheel frame (3).

5. The seamless EPDM steering wheel structure according to claim 1, characterized in that, The foam (12) is made of EPDM.

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