Seamless two-color mold injection-molded automobile steering wheel structure

Abstract

The utility model relates to the technical field of steering wheel structure especially is involved in a kind of seamless line two-color mould injection molding automobile steering wheel structure, including lower support piece assembly, upper support piece assembly is located between upper support piece assembly and lower support piece assembly steering wheel framework, lower support piece assembly includes previous injection support piece, post injection support piece and leather fixedly attached on the outer surface of post injection support piece, post injection support piece is formed by mould and soft material is attached on the outer surface of previous injection support piece, the structure of upper support piece assembly is same with the structure of lower support piece assembly, the previous injection support piece of lower support piece assembly is fixed with steering wheel framework by screw, and the previous injection support piece of upper support piece assembly is clamped with steering wheel framework.The utility model cancels artificial sewing process, to realize the automatic production of steering wheel, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of automobile steering wheels, and in particular to a seamless two-color injection molded automobile 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 two-color injection molded car steering wheel structure that replaces the polyurethane foam structure and the sewing thread tightening structure.

[0004] This utility model provides a seamless two-color injection molded automotive steering wheel structure, which adopts the following technical solution: A seamless two-color injection molded automotive steering wheel structure includes a lower support assembly, an upper support assembly, and a steering wheel frame located between the upper and lower support assemblies. The lower support assembly includes a pre-injection molded support, a post-injection molded support, and leather adhered and fixed to the surface of the post-injection molded support. The post-injection molded support is formed by attaching soft material to the outer surface of the pre-injection molded support using a mold. The structure of the upper support assembly is the same as that of the lower support assembly. The pre-injection molded support of the lower support assembly is fixed to the steering wheel frame with screws, and the pre-injection molded support of the upper support assembly is snapped into the steering wheel frame.

[0005] Optionally, multiple second barbs are fixed on the first injection molded support of the upper support assembly, and multiple connecting holes corresponding to the second barbs are opened on the steering wheel frame. The second barbs pass through the corresponding connecting holes and are snapped into the bottom of the steering wheel frame.

[0006] Optionally, the upper support assembly has multiple fixing blocks fixed on the previous injection molding support, and the lower support assembly has multiple first barbs fixed on the previous injection molding support, with the first barbs hooking onto the fixing blocks.

[0007] Compared with the prior art, the present invention has the following technical effects: This new steering wheel structure eliminates the traditional polyurethane foam structure, employing a two-color injection-molded support component. It also eliminates the leather stitching tensioning method, using a hook-and-loop fastening system on the support component. This eliminates the manual stitching process, achieving automated production of the steering wheel. Attached Figure Description

[0008] 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 first injection molded support component in the lower support component assembly of this utility model; Figure 4 This is a schematic diagram of the front injection molding support and the rear injection molding support in the lower support assembly of this utility model; Figure 5 This is a schematic diagram showing that the boundary of the subsequent injection molding of the previous injection molding support and the boundary of the subsequent injection molding support are flush with the boundary of the previous injection molding 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 A schematic diagram of the cross-sectional structure of FF.

[0009] Explanation of reference numerals in the attached drawings: 1. Lower support assembly; 11. Previous injection molded support; 12. Next injection molded support; 13. Leather; 15. Previous injection molding boundary; 16. Next injection molding boundary; 2. Upper support assembly; 3. Steering wheel frame; 31. Connecting hole; 4. Screw; 5. First barb; 6. Fixing block; 7. Second barb. Detailed Implementation

[0010] The following is in conjunction with the appendix Figure 1 - Appendix Figure 14 The present invention will be described in further detail below.

[0011] Reference Figures 1-14This utility model discloses a seamless two-color injection molded car steering wheel structure, including a lower support assembly 1, an upper support assembly 2, and a steering wheel frame 3, with the steering wheel frame 3 located between the upper support assembly 2 and the lower support assembly 1.

[0012] The upper support assembly 2 includes a pre-injection molded support 11, a post-injection molded support 12, and leather 13. The pre-injection molded support 11 is made of polypropylene or nylon fiberglass material, and the post-injection molded support 12 is made of TPO soft material. The leather 13 is glued to the outer surface of the post-injection molded support 12 with water-based adhesive to form the upper support assembly 2. The lower support assembly 1 has the same structure as the upper support frame assembly.

[0013] The first injection molded support 11 and the second injection molded support 12 adopt a two-color injection molding process, which is formed in one injection molding process. This process is divided into two steps. The first step, the first injection molding, uses a mold to injection mold the main body of the lower support component using a rigid material. Figure 3 As shown; in the second step, subsequent injection molding, a soft material is attached to the main surface of the previously injection-molded support 11 using another set of molds, as shown. Figure 4 As shown.

[0014] The lower support assembly 1's pre-molded support 11 is connected and fixed to the steering wheel frame 3 by screws 4. Multiple first barbs 5 are fixed inside the pre-molded support 11 of the lower support assembly 1, and multiple fixing blocks 6 are fixed inside the pre-molded support 11 of the upper support assembly 2. Each fixing block 6 corresponds to one barb, and the first barbs 5 hook onto the fixing blocks 6, thereby engaging the lower support assembly 1 with the upper support assembly 2.

[0015] Multiple second barbs 7 are fixed on the first injection molded support 11 of the upper support assembly 2. Multiple connecting holes 31 are opened on the steering wheel frame 3. Each second barb 7 corresponds to a connecting hole 31. The second barb 7 passes through the connecting hole 31 and is snapped onto the steering wheel frame 3.

[0016] This steering wheel structure eliminates the traditional polyurethane foam structure, adopting a two-color injection-molded support component structure. The leather stitching 13 is no longer tightened; instead, it uses a hook-and-loop fastening method on the support component. This eliminates the manual stitching process, achieving automated production of the steering wheel. The two-stage injection molding process is more efficient than simply attaching the foam to the previously injection-molded support component 11.

[0017] This utility model also discloses a construction process for a seamless two-color injection molded automotive steering wheel structure, including the following steps: S1. The upper support assembly 2 and the lower support assembly 1 are injection molded using a two-color injection molding process.

[0018] Injection molding is divided into two steps. The first step is the first injection molding, in which the main body of the first injection molded support component 11 is completed by using a hard material through a mold. The second step is the second injection molding, in which a soft material is attached to the main body surface of the first injection molded support component 11 through another set of molds.

[0019] The two-color injection molding process is used to manufacture the previous injection molded support 11 and the subsequent injection molded support 12. It is required that the boundary 16 of the subsequent injection molding is flush with the boundary 15 of the previous injection molding. Figure 5 As shown, the lower support assembly 1 has a leather groove and a parting line, with the subsequent injection boundary 16 and the previous injection boundary 15. After completely covering the surface of the subsequent injection boundary 16 with the cut leather 13, it is pasted along the parting line of the lower support assembly 1 inwards, ensuring complete coverage of the parting line surface.

[0020] S2. Connect the lower support assembly 1 to the steering wheel frame 3.

[0021] The structure is defined as the lower support connecting frame assembly, in which screws 4 are passed through the steering wheel frame 3 and tightened into the bolt holes on the previous injection-molded support 11 of the lower support assembly 1.

[0022] S3. Press the upper support assembly 2 onto the lower support connecting frame assembly.

[0023] The second barb 7 of the upper support assembly 2 is passed through the connecting hole 31 on the steering wheel frame 3, so that the second barb 7 hooks onto the bottom of the steering wheel frame 3, and the first barb 5 on the lower support assembly 1 hooks onto the fixing block 6 of the upper support assembly 2, thereby engaging the upper support assembly 2 with the steering wheel frame 3 and engaging the upper support assembly 2 with the lower support frame assembly, ultimately forming the steering wheel cover 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 and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A seamless two-color injection molded automotive 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 upper support assembly (2) and the lower support assembly (1). The lower support assembly (1) includes a pre-molded support (11), a post-molded support (12), and leather (13) pasted and fixed to the surface of the post-molded support (12). The post-molded support (12) is formed by attaching soft material to the outer surface of the pre-molded support (11) by a mold. The structure of the upper support assembly (2) is the same as that of the lower support assembly (1). The pre-molded support (11) of the lower support assembly (1) is fixed to the steering wheel frame (3) by screws (4). The pre-molded support (11) of the upper support assembly (2) is snapped into the steering wheel frame (3).

2. The seamless two-color injection molded automotive steering wheel structure according to claim 1, characterized in that, Multiple second barbs (7) are fixed on the first injection molded support (11) of the upper support assembly (2). Multiple connecting holes (31) corresponding to the second barbs (7) are opened on the steering wheel frame (3). The second barbs (7) pass through the corresponding connecting holes (31) and are snapped into the bottom of the steering wheel frame (3).

3. The seamless two-color injection molded automotive steering wheel structure according to claim 1 or 2, characterized in that, Multiple fixing blocks (6) are fixed on the previous injection molding support (11) of the upper support assembly (2), and multiple first barbs (5) are fixed on the previous injection molding support (11) of the lower support assembly (1). The first barbs (5) are hooked on the fixing blocks (6).

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