High shear core pull rivet

Abstract

The utility model relates to a fastener, concretely relates to a high shear core pull rivet. The core pull rivet includes mutually nested nail body and core rod, the nail body includes fixed block and spiral sleeve pole, spiral sleeve pole sets up connecting hole along the axial direction, the core rod includes prying block and spiral rod, the fixed block inside sets up the positioning hole containing prying block, the positioning hole communicates with connecting hole, spiral rod is connected in connecting hole. The utility model discloses core pull rivet high shear, is applicable to high vibration environment, and simple structure is convenient for operation.

Description

Technical Field

[0001] This utility model relates to a fastener, specifically a high shear-resistant blind rivet. Background Technology

[0002] Blind rivets are single-sided fasteners widely used in aerospace, rail transportation, and other applications requiring single-sided operation. Ordinary blind rivets lack sufficient shear strength, making them unsuitable for high-vibration environments. While some blind rivets offer high shear resistance, they often have multiple components, making manufacturing difficult. Furthermore, when the interlayer thickness varies, grinding the exposed core after riveting is necessary, adding to the operational inconvenience. Utility Model Content

[0003] To overcome the above-mentioned defects, the purpose of this utility model is to provide a high shear resistance blind rivet that is highly shear resistant, suitable for high vibration environments, and has a simple structure and is easy to operate.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A high shear-resistant blind rivet includes a rivet body and a core rod that fit together. The rivet body includes a fixing block and a spiral sleeve rod. The spiral sleeve rod has a connecting hole along its axial direction. The core rod includes a wrench block and a spiral rod. The fixing block has a positioning hole inside to accommodate the wrench block. The positioning hole communicates with the connecting hole. The spiral rod is threaded into the connecting hole.

[0005] Preferably, the fixing block has a hexagonal structure.

[0006] Preferably, the tail end of the spiral sleeve has several grooves.

[0007] Preferably, the wrench block includes a positioning block, a connecting block, and a rotating block. The positioning block mates with a positioning hole. The connecting block is frustum-shaped. The smaller diameter end of the connecting block is fixedly connected to the positioning block, and the larger diameter end of the connecting block is fixedly connected to the rotating block.

[0008] Preferably, the inner wall of the connecting hole is provided with an internal thread, and the outer wall of the auger is provided with an external thread, the external thread engaging with the internal thread.

[0009] The positive and beneficial effects of this utility model are as follows: In the riveting and fixing process of this utility model, the rivet is inserted into a pre-made rivet hole. The fixing mechanism of the rivet gun fixes the fixing block of the rivet body, and the rotating mechanism of the rivet gun is connected to the rotating block of the core rod, driving the core rod to rotate. Because the rivet body is fixed by the rivet gun and cannot rotate, the core rod and the rivet body are threaded together, forcing the part of the rivet body exposed in the interlayer to deform, forming a bulge. When the spiral sleeve and the spiral rod are fully screwed together, the bulge deformation reaches its maximum size. With continued rotation, because the rivet body and the core rod are fully engaged, the connecting block of the core rod breaks at the connection point with the positioning block under the rotation of the rivet gun. The fracture surface coincides with the end face of the rivet body fixing block, eliminating the need for secondary grinding of the protruding part, reducing labor intensity, and thus completing the riveting and fixing of the interlayer. This utility model increases the thread locking performance by tightening the thread, thereby ensuring the vibration resistance of the rivet. Different specifications of blind rivets can be made according to the requirements of different thickness interlayers, expanding the scope of application. Moreover, the structure is simple, easy to manufacture, and easy to operate. Attached Figure Description

[0010] Figure 1 This is one of the schematic diagrams of the nail body structure of this utility model; Figure 2 This is the second schematic diagram of the nail body structure of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the nail body of this utility model; Figure 4 This is a schematic diagram of the core rod structure of this utility model; Figure 5 This is one of the schematic diagrams of the high shear resistance blind rivet structure of this utility model; Figure 6 This is the second schematic diagram of the high shear-resistant blind rivet structure of this utility model; Figure 7 This is a diagram showing the state of the high shear-resistant blind rivet of this utility model after installation; In the diagram: 1-nail body, 11-fixing block, 12-spiral sleeve rod, 13-connecting hole, 131-internal thread, 14-positioning hole, 15-groove, 2-core rod, 21-tightening block, 211-positioning block, 212-connecting block, 213-rotating block, 22-spiral rod, 221-external thread. Detailed Implementation

[0011] The present invention will be further described below with reference to some specific embodiments.

[0012] Example 1 See Figures 1-7A high shear-resistant blind rivet includes a rivet body 1 and a core rod 2 that fit together. The rivet body 1 includes a fixing block 11 and a spiral sleeve 12. The spiral sleeve 12 has a connecting hole 13 along the axial direction. The core rod 2 includes a wrench block 21 and a spiral rod 22. The fixing block 11 has a positioning hole 14 inside to accommodate the wrench block 21. The positioning hole 14 communicates with the connecting hole 13. The spiral rod 22 passes through the positioning hole 14 and is threaded into the connecting hole 13.

[0013] Furthermore, the fixing block 11 has a hexagonal structure. The fixing block is connected to the anchor gun fixing mechanism, which facilitates the fixing of the anchor gun nail body.

[0014] Furthermore, three grooves 15 are evenly opened at the tail of the spiral sleeve 12. The grooved structure, combined with the threaded compression, further increases the threaded locking performance.

[0015] Furthermore, the wrench block 21 includes a positioning block 211, a connecting block 212, and a rotating block 213. The positioning block 211 is an irregular shape composed of a cylinder and a frustum. The positioning hole 14 is shaped to fit the positioning block 211, and the positioning block 211 is inserted into the positioning hole 14 from the frustum end. The rotating block 213 is connected to the anchor gun rotating mechanism. The connecting block 212 is frustum-shaped, with its small-diameter end fixedly connected to the cylindrical end of the positioning block 211, and its large-diameter end fixedly connected to the rotating block 213. The positioning block, in conjunction with the positioning hole, provides limiting and tensile strength, preventing the core rod from moving left or right during the engagement of the screw rod and the screw sleeve rod, ensuring it rotates only in its original position.

[0016] Furthermore, an internal thread 131 is formed on the inner wall of the tail of the connecting hole 13, and an external thread 221 is formed on the outer wall of the tail of the helical rod 22. The external thread 221 mates with the internal thread 131. The core rod has a smooth rod structure in the sandwich, which greatly enhances the shear capacity compared to the hollow structure or fully threaded structure of ordinary rivets, ensuring high shear resistance.

[0017] In use, this high-shear-resistant blind rivet involves fitting the rivet body and the core rod together. The positioning block of the core rod is embedded in the positioning hole of the fixing block. Part of the internal thread of the spiral sleeve is threadedly connected to part of the external thread of the spiral rod. The rivet is inserted into the pre-made rivet hole. A rivet gun is used, with its fixing mechanism securing the fixing block of the rivet body. The rotating mechanism of the rivet gun is connected to the rotating block, causing the core rod to rotate. Because the rivet body is fixed by the rivet gun and cannot rotate, the external thread of the spiral rod engages with the internal thread of the spiral sleeve, forcing the part of the rivet body exposed from the interlayer to deform, forming a bulge. When the spiral sleeve and the spiral rod are fully engaged, the bulge deformation reaches its maximum size. Continuing rotation, because the rivet body and the core rod are fully engaged, the connecting block of the core rod breaks at the connection point with the positioning block under the rotation of the rivet gun. The fracture surface coincides with the end face of the rivet body fixing block. See [reference needed]. Figure 7 No need for secondary grinding of protruding parts, reducing labor intensity, thus completing the riveting and fixing of the interlayer.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A high shear-resistant blind rivet, characterized in that, The device includes a nail body and a core rod that fit together. The nail body includes a fixing block and a spiral sleeve rod. The spiral sleeve rod has a connecting hole along the axial direction. The core rod includes a wrench block and a spiral rod. The fixing block has a positioning hole inside to accommodate the wrench block. The positioning hole communicates with the connecting hole. The spiral rod is threaded into the connecting hole.

2. The high shear resistance blind rivet according to claim 1, characterized in that, The fixing block has a hexagonal structure.

3. The high shear resistance blind rivet according to claim 1, characterized in that, Several grooves are opened at the tail of the spiral sleeve.

4. The high shear resistance blind rivet according to claim 1, characterized in that, The wrench block includes a positioning block, a connecting block, and a rotating block. The positioning block mates with a positioning hole. The connecting block is frustum-shaped. The smaller diameter end of the connecting block is fixedly connected to the positioning block, and the larger diameter end of the connecting block is fixedly connected to the rotating block.

5. The high shear-resistant blind rivet according to any one of claims 1-4, characterized in that, The inner wall of the connecting hole is threaded internally, and the outer wall of the helical rod is threaded externally, with the external thread engaging with the internal thread.

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