Connecting structure of plastic part and reinforced metal plate

Abstract

The utility model relates to a connecting structure of a plastic part and a reinforced metal plate. The connecting structure comprises the plastic part provided with a first circular hole; the reinforcing metal plate is provided with a second circular hole, and the second circular hole and the first circular hole are located on the same central axis; the annular piece is positioned at the second circular hole and is integrally formed with the reinforcing metal plate; the pulling rivet comprises a rivet body and a rivet cap, the rivet body penetrates through the first circular hole, the second circular hole and the annular part and is connected with the plastic part and the reinforcing metal plate, and the rivet cap is arranged at one end of the pulling rivet in a sleeving mode and is tightly combined with the pulling rivet. Compared with the prior art, the utility model has the advantages that the assembly difficulty of the plastic vehicle body structural member is reduced while the requirement of resisting torque attenuation is met, the production efficiency is improved, the manufacturing cost is reduced and the like.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and in particular to a connection structure between a plastic part and a reinforcing sheet metal. Background Technology

[0002] In the automotive manufacturing industry, plastic parts, including plastic resin tailgates, tail covers, and side doors, are often assembled with multiple reinforcing sheet metal parts using bolts. It is crucial to ensure the connection performance and reliability of these plastic body structural components and the reinforcing sheet metal. Torque attenuation requirements are typically defined for the connection areas, generally requiring attenuation to be no more than 20% to 30%. Currently, the method to combat torque attenuation in the market is to add metal ring-shaped components. Common metal ring-shaped components come in various shapes and sizes, including circular rings, elliptical rings, and T-rings. Figure 1 As shown, the annular component is embedded into the structural hole of the plastic part through assembly, thereby forming a metal support structure within the structural hole to resist torque attenuation, as shown. Figure 2 As shown. However, this method has problems with assembly difficulties and the metal ring part being easy to fall off. The main reason is that the size of the structural hole of the plastic part (dimensional tolerance ±0.5mm) and the size of the metal ring (dimensional tolerance ±0.2mm) cannot be well matched, which leads to the part shifting and loosening in actual production, resulting in the bolts loosening, which makes it impossible to meet the connection requirements. As a result, rework is required frequently, which not only reduces production efficiency but also increases manufacturing costs.

[0003] Patent publication number CN210949407U discloses a connection structure between a plastic part and a reinforcing sheet metal, comprising a plastic part, a reinforcing sheet metal, and a bolt assembly. The plastic part has a circular hole, and the reinforcing sheet metal has a cylindrical boss integrally stamped therewith. The bolt assembly includes a bolt and a nut. When the plastic part and the reinforcing sheet metal are connected, the reinforcing sheet metal fits snugly against the plastic part. The cylindrical boss on the reinforcing sheet metal passes through the corresponding circular hole on the plastic part, and the side of the cylindrical boss fits against the inner wall of the circular hole. The end of the cylindrical boss away from the reinforcing sheet metal is flush with the end face of the plastic part. One end of the bolt thread passes sequentially through the plastic part and the reinforcing sheet metal and is fastened by the nut, with the cylindrical boss integrally formed with the reinforcing sheet metal. However, after installation, the static torque value of the bolt may be significantly lower than the specified installation torque value, resulting in insufficient clamping force, which in turn causes loosening and abnormal noise, or even peeling and prevents further assembly. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the existing technology and provide a connection structure between plastic parts and reinforced sheet metal, which can reduce the assembly difficulty of plastic body structural parts, improve production efficiency, and reduce manufacturing costs while meeting the requirements for resisting torque attenuation.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A connection structure between a plastic part and reinforcing sheet metal, comprising:

[0007] A plastic part with a first circular hole;

[0008] The reinforced sheet metal is provided with a second circular hole, and the second circular hole and the first circular hole are on the same central axis.

[0009] A ring-shaped component located at the second circular hole and integrally formed with the reinforcing sheet metal;

[0010] And a rivet, comprising a rivet body that passes through the first circular hole, the second circular hole, the annular member and connects the plastic part and the reinforcing sheet metal, and a rivet head that is fitted onto the rivet and fits against the inner wall of the annular member.

[0011] Furthermore, when the plastic part and the reinforcing sheet metal are connected, the reinforcing sheet metal is attached to the plastic part, and the annular part is located on the side close to the plastic part and passes through the first circular hole.

[0012] Furthermore, the diameter of the annular member is less than or equal to the diameter of the first circular hole.

[0013] Furthermore, the height of the annular member is 0.1 to 0.3 mm higher than the height of the first circular hole, preferably 0.2 mm. When the nail body is connected to the nut head, the axial force of the product always acts on the surface of the arc-shaped connector and will not be transmitted to the first circular hole. This ensures that the force is always transmitted between the annular members, and the annular members will not be crushed or deformed under torque, resulting in a reduction in product torque.

[0014] Furthermore, an arc-shaped connector is provided at the connection between the annular component and the reinforcing sheet metal.

[0015] Furthermore, the ratio of the radius of the arc connector to the height of the annular member is 0.625 to 1:1.

[0016] Furthermore, the nail body includes a grooved section that mates with the nail head, and a pull rod section connected to the grooved section, one end of which extends out from the nail head and mates with the riveting equipment to clamp the pull rod.

[0017] Furthermore, the outer wall of the grooved section is provided with axial grooves.

[0018] Furthermore, the inner wall of the nail head is provided with several protrusions that mate with the axial groove and extend radially.

[0019] Furthermore, the cross-sectional shape of the protrusion includes circular, rectangular, elliptical, and inverted toothed shapes.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] (1) By setting an annular part integrally formed with the reinforcing sheet metal, the present invention reduces the dimensional accuracy requirement of the first circular hole of the plastic part, and transforms the first circular hole from a high-precision assembly hole into a low-precision through hole, thereby reducing the assembly difficulty.

[0022] (2) During use, the plastic parts are heated and creep, causing the wall thickness of the plastic parts to become thinner, which easily creates a gap between them and the ring-shaped parts. Since the ring-shaped parts of this utility model are integrally formed with the reinforcing sheet metal, the ring-shaped parts will not shift or loosen due to the gap, thus better meeting the requirements for resisting torque attenuation during connection.

[0023] (3) After the ring-shaped part and the reinforcing sheet metal are integrally formed in this utility model, the number of product parts is reduced, the manufacturing process is shortened, the manufacturing cost is reduced, and the production efficiency is improved.

[0024] (4) This utility model uses a rivet to pass through the first circular hole, the second circular hole, and the annular part, connecting the plastic part and the reinforcing sheet metal. The rivet head is fitted onto the rivet and fits against the inner wall of the annular part. Compared to the conventional case where the rivet head is located on one side of the first circular hole, the second circular hole, and the annular part, the rivet head in this utility model expands after riveting, causing it to fit tightly against the annular part. When a gap occurs between the first circular hole and the annular part, an outward force is applied to the annular part, ensuring that the annular part always fits against the first circular hole. This makes the connection between the plastic part and the reinforcing sheet metal more secure and provides better sealing. It also ensures strong stability and reliability even when a gap occurs between the annular part and the plastic part.

[0025] (5) The rivet of this utility model is riveted by groove, which makes the operation more convenient and the anti-loosening performance stronger. Attached Figure Description

[0026] Figure 1 Here are schematic diagrams of common metal ring-shaped components: (a) circular ring, (b) elliptical ring;

[0027] Figure 2 This is a diagram showing the connection structure between the plastic parts and the reinforcing sheet metal when using a metal ring-shaped component.

[0028] Figure 3 This is a diagram showing the connection structure between the plastic part and the reinforcing sheet metal as shown in Example 1;

[0029] Figure 4 This is a schematic diagram of the rivet body shown in Example 2;

[0030] Figure 5 This is a cross-sectional view of the nail head shown in Example 2.

[0031] Explanation of markings in the diagram:

[0032] 1-Plastic part, 11-First circular hole;

[0033] 2-Reinforced sheet metal, 21-Second circular hole;

[0034] 3-Ring-shaped component, 31-Circular arc connector;

[0035] 4-Rivet, 41-Rivet body, 411-Groove section, 4111-Axial groove, 412-Rivet rod section, 42-Rivet head, 421-Protrusion;

[0036] 5- Bolt, 51- Nut. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments. In the following embodiments or examples, unless otherwise specified, the functional components or structures are conventional components or structures used in the art to achieve the corresponding functions.

[0038] It should be noted that in the description of this utility model, the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] A connection structure between a plastic part and reinforcing sheet metal, comprising:

[0041] Plastic part 1 with a first circular hole 11;

[0042] The reinforcing sheet metal 2 is provided with a second circular hole 21, and the second circular hole 21 and the first circular hole 11 are on the same central axis.

[0043] The annular part 3 is located at the second circular hole 21 and is integrally formed with the reinforcing sheet metal 2;

[0044] And a rivet 4, which includes a rivet body 41 that passes through the first circular hole 11, the second circular hole 21, and the annular member 3 and connects the plastic part 1 and the reinforcing sheet metal 2, and a rivet head 42 that is fitted on the rivet 41 and fits against the inner wall of the annular member 3.

[0045] In some specific embodiments, when the plastic part 1 and the reinforcing sheet metal 2 are connected, the reinforcing sheet metal 2 is attached to the plastic part 1, and the annular part 3 is located on the side close to the plastic part 1 and passes through the first circular hole 11.

[0046] In some specific embodiments, the diameter of the annular member 3 is less than or equal to the diameter of the first circular hole 11.

[0047] In some specific embodiments, the height of the annular member 3 is 0.1 to 0.3 mm higher than the height of the first circular hole 11, preferably 0.2 mm.

[0048] In some specific embodiments, an arc-shaped connector 31 is provided at the connection between the annular member 3 and the reinforcing sheet metal 2.

[0049] In some specific embodiments, the ratio of the radius of the arc connector 31 to the height of the annular member 3 is 0.625 to 1:1.

[0050] In some specific embodiments, the nail body 41 includes a grooved section 411 that mates with the nail head 42, and a pull rod section 412 connected to the grooved section 411. One end of the pull rod section 412 extends out of the nail head 42 and mates with the riveting equipment to clamp the pull rod.

[0051] In some specific embodiments, the outer wall of the grooved section 411 is provided with an axial groove 4111.

[0052] In some specific embodiments, the inner wall of the nail head 42 is provided with a plurality of protrusions 421 that cooperate with the axial groove 4111 and extend radially.

[0053] In some specific embodiments, the cross-sectional shape of the protrusion 421 includes circular, rectangular, elliptical, and inverted toothed shapes.

[0054] Each of the above embodiments can be implemented individually or in any combination of two or more.

[0055] The following description uses specific examples to illustrate the point.

[0056] Example 1

[0057] A connection structure between a plastic part and reinforcing sheet metal, such as Figure 3 As shown, it includes:

[0058] Plastic part 1 with a first circular hole 11;

[0059] The reinforcing sheet metal 2 is provided with a second circular hole 21, and the second circular hole 21 and the first circular hole 11 are on the same central axis.

[0060] The annular part 3 is located at the second circular hole 21 and is integrally formed with the reinforcing sheet metal 2;

[0061] And a rivet 4, which includes a rivet body 41 that passes through the first circular hole 11, the second circular hole 21, and the annular member 3 and connects the plastic part 1 and the reinforcing sheet metal 2, and a rivet head 42 that is fitted on the rivet 41 and fits against the inner wall of the annular member 3.

[0062] In this embodiment, when the plastic part 1 and the reinforcing sheet metal 2 are connected, the reinforcing sheet metal 2 is attached to the plastic part 1, and the annular part 3 is located on the side close to the plastic part 1 and passes through the first circular hole 11.

[0063] In this embodiment, the diameter of the annular member 3 is less than or equal to the diameter of the first circular hole 11.

[0064] In this embodiment, the height of the annular member 3 is 0.2 mm higher than the height of the first circular hole 11.

[0065] In this embodiment, an arc-shaped connector 31 is provided at the connection between the annular member 3 and the reinforcing sheet metal 2.

[0066] In this embodiment, the ratio of the radius of the arc connector 31 to the height of the annular member 3 is 0.8:1.

[0067] The working process and principle of the connection structure are as follows:

[0068] The central axes of the second circular hole 21 of the reinforcing sheet metal 2 and the first circular hole 11 of the plastic part 1 are aligned on the same straight line. The annular part 3 is inserted into the first circular hole 11. The nail body 41 is passed through the first circular hole 11, the annular part 3, and the second circular hole 21. The nail head 42 is fitted onto the nail body 41, and the nail head 42 is pushed along the axial direction of the nail body 41 to a position on the annular part 3, so that the outer wall of the nail head 42 is tightly attached to the inner wall of the annular part 3. The pressure fixing is completed using a riveting device. After completion, the nail head 42 expands, further providing a certain pressure to the annular part 3, so that the outer wall of the annular part 3 is tightly attached to the inner wall of the first circular hole 11 of the plastic part 1.

[0069] Example 2

[0070] This embodiment is based on embodiment 1, such as... Figure 4 and 5 As shown, further settings are also provided:

[0071] In this embodiment, the nail body 41 includes a grooved section 411 that mates with the nail head 42, and a pull rod section 412 connected to the grooved section 411. One end of the pull rod section 412 extends out of the nail head 42 and mates with the riveting equipment to clamp the pull rod.

[0072] In this embodiment, the outer wall of the grooved section 411 is provided with an axial groove 4111;

[0073] The inner wall of the nail head 42 is provided with a plurality of protrusions 421 that cooperate with the axial groove 4111 and extend radially.

[0074] In this embodiment, the cross-sectional shape of the protrusion 421 is circular.

[0075] The working process and principle of the connection structure are as follows:

[0076] The central axes of the second circular hole 21 of the reinforcing sheet metal 2 and the first circular hole 11 of the plastic part 1 are aligned on the same straight line. The annular part 3 is inserted into the first circular hole 11. The nail body 41 is passed through the first circular hole 11, the annular part 3, and the second circular hole 21. After aligning the protrusion 421 on the inner wall of the nail head 42 with the axial groove 4111 of the groove section 411, the nail head 42 is fitted onto the nail body 41. When the nail head 42 is pushed along the axial direction of the nail body 41 to the position of the annular part 3, the nail head 42 is rotated so that the protrusion 421 on it is located in the axial groove 4111 to fix the axial relative position of the nail head 42 and the nail body 41. Finally, a riveting device is used to complete the pressure fixation.

[0077] Example 3

[0078] Compared with Embodiment 2, most aspects are the same, except that the cross-sectional shape of the protrusion 421 is a reverse tooth shape. When the nail head 42 is squeezed by the nail body 41 and a rebound force is generated, it cannot overcome the resistance between the reverse tooth protrusion 421 and the axial groove 4111. Therefore, the nail body 41 will not retract in the reverse direction, achieving a backstop effect, thereby preventing loosening and improving the fixing strength of the riveting.

[0079] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A connection structure between a plastic part and reinforcing sheet metal, characterized in that, The application relates to a plastic part (1) provided with a first circular hole (11), a reinforcing sheet metal (2) provided with a second circular hole (21) which is on the same central axis as the first circular hole (11), a ring-shaped part (3) located at the second circular hole (21) and integrated with the reinforcing sheet metal (2), and a pull rivet (4) comprising a rivet body (41) penetrating through the first circular hole (11), the second circular hole (21) and the ring-shaped part (3) and connecting the plastic part (1) and the reinforcing sheet metal (2), and a rivet cap (42) sleeved on the pull rivet (4) and abutting against the inner wall of the ring-shaped part (3). When the plastic part (1) and the reinforcing sheet metal (2) are connected, the reinforcing sheet metal (2) abuts against the plastic part (1), and the ring-shaped part (3) is located on the side close to the plastic part (1) and penetrates through the first circular hole (11). The diameter of the ring-shaped part (3) is less than or equal to the diameter of the first circular hole (11). The height of the ring-shaped part (3) is 0.1-0.3 mm higher than the height of the first circular hole (11). The connecting part of the ring-shaped part (3) and the reinforcing sheet metal (2) is provided with a circular arc connecting part (31).

2. The connecting structure of a plastic member and a reinforced sheet metal according to claim 1, wherein The ratio of the radius of the circular arc connecting part (31) to the height of the ring-shaped part (3) is 0.625-1:

1.

3. The connecting structure of a plastic member and a reinforced sheet metal according to claim 1, wherein The rivet body (41) comprises a groove section (411) matched with the rivet cap (42), a pull rod section (412) connected with the groove section (411), and one end of the pull rod section (412) extends out of the rivet cap (42) and is matched with riveting equipment to hold the pull rod.

4. The connection structure of a plastic member and a reinforced sheet metal according to claim 1, wherein The outer wall of the groove section (411) is provided with an axial groove (4111).

5. The connection structure of a plastic member and a reinforced sheet metal according to claim 1, wherein The inner wall of the rivet cap (42) is provided with a plurality of protrusions (421) matched with the axial groove (4111) and extending radially.

6. The connection structure of a plastic member and a reinforced sheet metal according to claim 5, wherein The cross-sectional shape of the protrusions (421) comprises a circle, a rectangle, an ellipse and an inverted tooth shape.

7. The connection structure of a plastic member and a reinforced sheet metal according to Claim 1, wherein ​ 8. The connection structure of a plastic member and a reinforced sheet metal according to claim 7, wherein ​ 9. The structure of claim 8, wherein the plastic member is formed of a resin material, and the reinforcing sheet metal is formed of a metal material. ​ 10. The structure of claim 9, wherein the plastic member is formed of a resin material, and the reinforcing sheet metal is formed of a metal material. ​

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