Fastening connection structure

Abstract

The utility model discloses a fastening connection structure which comprises a connecting sleeve arranged in a connecting hole of a non-metal plate, a bolt is arranged in the connecting sleeve, and the bottom of the bolt extends out of the connecting sleeve and is connected with a connecting hole of a metal plate. The connecting sleeve comprises a cylinder and a disc arranged at the top of the cylinder, and the disc makes contact with the top of the bolt. A metal sleeve is replaced by the connecting sleeve, the cylinder is in interference fit with the connecting hole of the non-metal part, the connecting sleeve is limited through the arrangement of the disc in the connecting sleeve, and the risk that the connecting sleeve moves or falls off in the connecting hole of the non-metal part is prevented; during assembly, the connecting sleeve is directly pressed into the connecting hole of the non-metal part, the process assembly cost is greatly reduced, meanwhile, the situation that the non-metal part is rejected due to omission of the metal sleeve is avoided, and the technical problems that in the prior art, the fastening mode that the non-metal part is embedded into the metal sleeve is high in cost, and omission risks exist are solved.

Description

Technical Field

[0001] The utility model belongs to the field of fasteners and relates to a fastening connection structure. Background Art

[0002] As common standard parts, fasteners are widely used in the automotive parts industry, mainly for use between metal plates. With the popularization of the intelligence and lightweight of automotive parts, more and more non-metal parts are applied to the automotive industry, such as control panels, brackets, covers, etc. Since non-metal parts have low strength and are easy to deform, they cannot be directly fastened by traditional bolt fastening methods. In the automotive parts industry, it is common to embed a metal sleeve in the connection hole of a non-metal part and then fasten it with a bolt. When necessary, a spring washer is added to prevent loosening. However, the method of embedding the metal sleeve in the non-metal connection hole increases the process assembly cost and the risk of missing the metal sleeve. Missing the metal sleeve will also increase the scrap rate of non-metal parts. Summary of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a fastening connection structure to solve the technical problems of high cost and missing risk in the existing fastening method of embedding a metal sleeve in a non-metal part.

[0004] To solve the above technical problems, the utility model is implemented by adopting the following technical solutions:

[0005] A fastening connection structure includes a connection sleeve arranged in the connection hole of a non-metal plate. A bolt is arranged in the connection sleeve, and the bottom of the bolt extends out of the connection sleeve and is connected to the connection hole of a metal plate.

[0006] The connection sleeve includes a cylinder and a disc arranged at the top of the cylinder. The disc contacts the top of the bolt.

[0007] The utility model further includes the following technical features:

[0008] The top of the disc is provided with a spline, and the outer diameter of the disc is greater than the maximum outer diameter of the bolt.

[0009] An interference fit is provided between the connection sleeve and the connection hole of the non-metal plate.

[0010] 1 - 2 threads of internal threads are arranged on the inner wall of the cylinder.

[0011] The difference between the maximum outer diameter of the internal thread and the inner hole diameter of the cylinder is not greater than 0.3 mm.

[0012] The length of the cylinder is 0.5 mm less than the length of the connection hole of the non-metal plate.

[0013] Compared with the existing technology, the beneficial technical effects of the utility model are:

[0014] In the present utility model, a connecting sleeve is used instead of a metal sleeve. Among them, the cylinder is in interference fit with the connecting hole of the non-metallic part, and through the setting of the disc in the connecting sleeve, the connecting sleeve is limited, preventing the risk of the connecting sleeve from moving or falling off in the connecting hole of the non-metallic part; during assembly, the connecting sleeve can be directly pressed into the connecting hole of the non-metallic part, greatly reducing the process assembly cost. At the same time, it avoids the occurrence of waste products of non-metallic parts caused by missing the metal sleeve, and solves the technical problems of high cost and risk of omission in the fastening method of embedding the metal sleeve in the non-metallic part in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the structure of the connecting sleeve in the present utility model;

[0017] Figure 3 is a top view structural schematic diagram of the connecting sleeve in the present utility model.

[0018] The meanings of the various reference numerals in the figure are as follows: 1 - bolt, 2 - connecting sleeve, 3 - non-metallic plate, 4 - metal plate, 5 - internal thread, 6 - spline;

[0019] 201 - cylinder, 202 - disc.

[0020] The following further elaborates on the specific content of the present utility model in conjunction with embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that all the components in the present utility model, without special instructions, are components known in the art.

[0022] The following gives specific embodiments of the present utility model. It should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solution of this application fall within the protection scope of the present utility model.

[0023] The present utility model provides a fastening connection structure, including a connecting sleeve 2 arranged in the connecting hole of a non-metallic plate 3, a bolt 1 is arranged in the connecting sleeve 2, the bottom of the bolt 1 extends out of the connecting sleeve 2 and is connected to the connecting hole of a metal plate 4;

[0024] The connecting sleeve 2 includes a cylinder 201 and a disc 202 arranged at the top of the cylinder 201, and the disc 202 contacts the top of the bolt 1.

[0025] In the above technical solution, the connecting sleeve 2 is used instead of the metal sleeve. Among them, the cylinder 201 has an interference fit with the connecting hole of the non-metallic part 3, and through the setting of the disc 202 in the connecting sleeve 2, the connecting sleeve 1 is limited, preventing the risk of the connecting sleeve 1 from moving or falling off in the connecting hole of the non-metallic part 3; during assembly, the connecting sleeve 2 can be directly pressed into the connecting hole of the non-metallic part 3, greatly reducing the process assembly cost. At the same time, it avoids the occurrence of waste products of non-metallic parts caused by missing metal sleeves, and solves the technical problems of high cost and missing risk in the fastening method of embedding metal sleeves in non-metallic parts in the prior art.

[0026] In this solution, both the connecting sleeve 2 and the bolt 1 are made of metal materials.

[0027] A spline 6 is provided at the top of the disc 202, and the outer diameter of the disc 202 is greater than the maximum outer diameter of the bolt 1.

[0028] In the above technical solution, setting the spline 6 increases the friction force between the connecting sleeve 2 and the bolt 1, playing an anti-loosening role and avoiding the use of independent anti-loosening parts such as spring washers. Moreover, in the existing structure, it is also impossible to achieve the anti-loosening function by adding a spring washer in the metal sleeve, because the spring washer directly contacts the non-metallic plate 3 and will directly damage the surface of the metal plate 4, so it is impossible to achieve the anti-loosening effect by adding a spring washer.

[0029] The outer diameter of the disc 202 is greater than the maximum outer diameter of the bolt 1, enabling the disc 202 to well support the bolt head of the bolt 1 and making the connection between the connecting sleeve 2 and the bolt 1 more stable.

[0030] There is an interference fit between the connecting sleeve 2 and the connecting hole of the non-metallic plate 3.

[0031] In the above technical solution, in the interference fit method, the elastic property of the material is used to expand and deform the connecting hole of the non-metallic plate 3 and sleeve it on the connecting sleeve 2. When the connecting hole resumes its original shape, a clamping force on the shaft is generated to connect the two parts, making the connection between the connecting sleeve 2 and the non-metallic plate 3 more stable.

[0032] One to two threads of internal thread 5 are provided on the inner wall of the cylinder 201.

[0033] In the above technical solution, the internal thread 5 is used to screw into the thread of the bolt 1, enabling the connecting sleeve 2 and the bolt 1 to form an assembly and avoiding missing installation.

[0034] The difference between the maximum outer diameter of the internal thread 5 and the inner hole diameter of the cylinder 201 is not greater than 0.3 mm.

[0035] In the above technical solution, this setting method ensures a proper gap between the inner hole of the connecting sleeve 2 and the bolt, and this part can meet the requirements of different specifications of threads, with strong versatility.

[0036] The length of the cylinder 201 is 0.5 mm less than the length of the connection holes of the non-metal plate 3.

[0037] In the above technical solution, this setting method can prevent the contact between the connecting sleeve 2 and the metal plate 5 and interference.

Claims

1. A fastening connection structure, characterized in that, It includes a connecting sleeve (2) arranged in the connecting hole of a non-metal plate (3), a bolt (1) is arranged in the connecting sleeve (2), and the bottom of the bolt (1) extends out of the connecting sleeve (2) and is connected to the connecting hole of a metal plate (4); The connecting sleeve (2) includes a cylinder (201) and a disc (202) arranged at the top of the cylinder (201), and the disc (202) is in contact with the top of the bolt (1).

2. The fastening connection structure according to claim 1, characterized in that, A spline (6) is arranged at the top of the disc (202), and the outer diameter of the disc (202) is larger than the maximum outer diameter of the bolt (1).

3. The fastening connection structure according to claim 1, characterized in that, An interference fit is provided between the connecting sleeve (2) and the connecting hole of the non-metal plate (3).

4. The fastening connection structure according to claim 1, wherein, One or two threads of internal threads (5) are arranged on the inner wall of the cylinder (201).

5. The fastening connection structure according to claim 4, characterized in that, The difference between the maximum outer diameter of the internal thread (5) and the inner hole diameter of the cylinder (201) is not greater than 0.3 mm.

6. The fastening connection structure according to claim 1, characterized in that, The length of the cylinder (201) is 0.5 mm less than the length of the connecting hole of the non-metal plate (3).

Images