Self-locking drum-type core-pulling rivet with good fastening effect

Abstract

The utility model relates to core pull rivet technical field, concretely is a kind of self-locking drum type core pull rivet of good fastening effect, including filling mechanism is located between the rivet core and rivet body, filling mechanism includes metal cylinder, the annular groove is established in rivet body inner side wall top end, and metal cylinder is fixedly sleeved in the annular groove inside of rivet body, metal cylinder is movably sleeved with rivet core, and the plurality of clamping slots are established in the outer side wall of rivet core. In the utility model, by rivet body top end and rivet core head through the hole of being riveted object and then pulling rivet core makes its head extrude rivet body, makes the middle part of rivet body first deformation filling the hole of being riveted object, along with rivet core continues to pull, so that rivet body top end is extruded deformation by rivet core head, to make rivet body top end extrusion metal cylinder deformation and be stuck in the plurality of clamping slots, and then connecting cylinder and gasket resist and open and show petal shape, and then pull rivet core makes connecting cylinder bottom and being riveted object resist and touch, to improve the connection fastening between rivet and being riveted object.

Description

Technical Field

[0001] This utility model relates to the field of blind rivet technology, specifically a self-locking drum-shaped blind rivet with good fastening effect. Background Technology

[0002] Blind rivets mainly consist of a rivet body and a rivet core. They are a type of rivet used for single-sided riveting and are generally used in conjunction with a rivet gun. A hole is made in the object to be riveted, and then the rivet core and rivet body are passed through the hole. The rivet gun is then used to pull the rivet core, causing the protruding head of the rivet core to compress and deform the rivet body. This causes the expanded part of the rivet body to form an uphead that applies pressure to the object to be riveted. The rivet core is then broken off by a pre-cut neck groove, completing the riveting operation. However, existing rivets mainly rely on the expanded part of the rivet body after riveting to apply pressure to the object to be riveted, which may result in insufficient fastening effect. Utility Model Content

[0003] The purpose of this invention is to provide a self-locking drum-shaped pull rivet with good fastening effect to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A self-locking drum-shaped pull rivet with good fastening effect includes a rivet core and a rivet body, wherein the rivet core is movably sleeved inside the rivet body, and a necking groove is formed on the outer wall of the rivet core, comprising:

[0006] A filling mechanism and an auxiliary mechanism are provided to improve the fastening of the connection between the rivet body and the rivet core. The filling mechanism is located between the rivet core and the rivet body. The filling mechanism includes a metal cylinder. An annular groove is provided at the top of the inner side wall of the rivet body. The metal cylinder is fixedly sleeved inside the annular groove of the rivet body. The metal cylinder is movably sleeved with the rivet core. Multiple slots are provided on the outer side wall of the rivet core. The auxiliary mechanism is fixedly sleeved with the rivet core.

[0007] Furthermore, the auxiliary mechanisms include:

[0008] The connecting cylinder and the hoop are fixedly sleeved on the inner side wall of the top opening of the connecting cylinder and the top of the nail core, and the hoop is fixedly sleeved on the outer side wall of the connecting cylinder.

[0009] Furthermore, the diameter of the middle part of the rivet body is smaller than that of the top part, and multiple slots are opened in the middle part of the rivet body, with a washer ring fixedly sleeved on the outer side wall of the rivet body.

[0010] Furthermore, the outer wall of the connecting cylinder has multiple cutting grooves.

[0011] Furthermore, the bottom opening of the connecting cylinder has a trumpet-shaped structure.

[0012] Furthermore, the inner diameters at both ends of the metal cylinder are larger than the inner diameter in the middle.

[0013] Furthermore, multiple expansion joints are provided on the outer wall of the metal cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By passing the rivet head and the rivet core head through a hole in the object being riveted, and then pulling the rivet core to compress the rivet head, the rivet head is restricted by the connecting sleeve, causing the middle part of the rivet head to deform and fill the hole in the object being riveted, thus improving the connection and tightness between the hole and the rivet. As the rivet core continues to be pulled, the deformed middle part of the rivet head inside the hole causes the rivet head to be compressed and deformed, thus causing the rivet head to compress and deform the metal sleeve and get stuck in multiple slots, improving the connection and tightness between the rivet head and the rivet core. Then, the connecting sleeve and the washer collide and burst open into a petal shape. Pulling the rivet core again causes the bottom of the connecting sleeve to collide with the object being riveted, increasing the contact area between the expanded part of the rivet and the object being riveted, thereby improving the connection and tightness between the rivet and the object being riveted. Attached Figure Description

[0016] Figure 1 These are product images of existing blind rivets;

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the connecting cylinder and nail core structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the metal cylinder and rivet structure in this utility model.

[0021] In the diagram: 100, nail core; 101, neck break groove; 102, slot; 200, rivet body; 210, washer ring; 300, filling mechanism; 310, metal cylinder; 311, expansion joint; 400, auxiliary mechanism; 410, connecting cylinder; 411, cutting groove; 420, hoop ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 2-5In this embodiment of the present invention, a self-locking drum-shaped pull rivet with good fastening effect includes a rivet core 100 and a rivet body 200, wherein the rivet core 100 is movably sleeved inside the rivet body 200, and a necking groove 101 is provided on the outer wall of the rivet core 100, comprising:

[0024] A filling mechanism 300 and an auxiliary mechanism 400 are provided to improve the tightness of the connection between the rivet body 200 and the rivet core 100. The filling mechanism 300 is located between the rivet core 100 and the rivet body 200. The filling mechanism 300 includes a metal cylinder 310. An annular groove is provided at the top of the inner side wall of the rivet body 200, and the metal cylinder 310 is fixedly sleeved inside the annular groove of the rivet body 200. The metal cylinder 310 is movably sleeved with the rivet core 100. Multiple slots 102 are provided on the outer side wall of the rivet core 100. The auxiliary mechanism 400 is fixedly sleeved with the rivet core 100.

[0025] Specifically, by setting a metal cylinder 310 between the rivet body 200 and the rivet core 100, when the rivet core 100 is pulled and its protruding head presses against the rivet body 200 to deform, the metal cylinder 310 can be driven to deform synchronously, so that the deformed metal cylinder 310 fills the gap between the rivet body 200 and the rivet core 100, and the deformed metal cylinder 310 fills the space between the deformed end of the rivet body 200 and the slot 102, so that the deformed metal cylinder 310 is stuck inside multiple slots 102, thereby improving the connection tightness between the rivet body 200 and the rivet core 100, and thus improving the tightness after the rivet is riveted.

[0026] Example 1

[0027] like Figure 3-5 As shown, in this embodiment, the auxiliary mechanism 400 includes:

[0028] The connecting cylinder 410 and the hoop 420 are connected. The inner side wall of the top opening of the connecting cylinder 410 is fixedly sleeved with the top of the nail core 100. The hoop 420 is fixedly sleeved with the outer side wall of the connecting cylinder 410. The outer side wall of the connecting cylinder 410 is provided with multiple cutting grooves 411. The diameter of the middle part of the rivet body 200 is smaller than the diameter of the top end, and the middle part of the rivet body 200 is provided with multiple slots. The outer side wall of the rivet body 200 is fixedly sleeved with a washer 210.

[0029] In this embodiment, the clamp 420 is tightly fitted onto the connecting cylinder 410. The clamp 420 is only clamped onto the connecting cylinder 410, not welded to it. During the riveting process, the head of the rivet core 100 and the top of the rivet body 200 pass through the hole opened in the object being riveted. The middle part of the rivet body 200 is located inside the hole in the object being riveted. The hole opened in the object being riveted has the same diameter as the bottom opening of the connecting cylinder 410 and is larger than the diameter of the rivet body 200. By pulling the rivet core 100... The head of the rivet 100 moves synchronously with the connecting cylinder 410, and the head of the rivet core 100 presses down on the rivet body 200 to deform as a whole. At this time, the connecting cylinder 410 and the clamp ring 420 can limit the top of the rivet body 200 to a certain extent, so that the top of the rivet body 200 does not deform first, but the middle part of the rivet body 200 deforms first by relying on the slot. After being squeezed and deformed, the middle part of the deformed rivet body 200 abuts against the hole in the object being riveted, improving the connection between the rivet body 200 and the object being riveted. The connection between the holes on the riveted objects is secure because the holes are filled with the middle part of the deformed rivet body 200. Further pulling of the rivet core 100 will press and deform the top of the rivet body 200, causing the metal cylinder 310 to deform under pressure and become stuck in multiple slots 102. Then, the rivet core 100 drives the bottom of the connecting cylinder 410 to contact the washer ring 210. Simultaneously, the deformed top of the rivet body 200 applies pressure to the connecting cylinder 410 inside, causing the connecting cylinder... 410 relies on its own cutting groove 411 to burst open, so that the bottom opening of the connecting cylinder 410 is petal-shaped, and the hoop 420 breaks off from the connecting cylinder 410. Then, the nail core 100 is pulled until the bottom opening of the connecting cylinder 410 contacts the object being riveted, thereby increasing the contact surface between the overall expansion part of the rivet and the object being riveted, thereby improving the tightness of the rivet after riveting. Then, the nail core 100 is broken off by the neck groove 101. The object being riveted is a high-strength metal plate or other materials.

[0030] like Figure 3-4 As shown, in this embodiment, the bottom opening of the connecting cylinder 410 is a trumpet-shaped structure, and the inner diameters at both ends of the metal cylinder 310 are larger than the inner diameter at the middle.

[0031] In specific implementation, the bottom opening of the connecting cylinder 410 is a trumpet-shaped structure, so that when the connecting cylinder 410 is moved by the head of the nail core 100, the bottom opening of the connecting cylinder 410 is more likely to burst open and disperse in a petal shape after being pressed after contacting the pad ring 210. The metal cylinder 310 is thinner in the middle, so that the metal cylinder 310 is more likely to deform inward when deformed, so that the metal cylinder 310 can be stuck in multiple slots 102 after deformation.

[0032] Example 2

[0033] Based on Embodiment 1, multiple expansion joints 311 are provided to facilitate the deformation of the metal cylinder 310.

[0034] like Figure 5As shown, in this embodiment, the outer wall of the metal cylinder 310 is provided with multiple deformation joints 311.

[0035] In practice, when the metal cylinder 310 is deformed and squeezed by the top of the rivet 200, the metal cylinder 310 can be deformed by relying on the deformation joint 311, which facilitates the deformation of the metal cylinder 310.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-locking drum-shaped pull rivet with good fastening effect, comprising a rivet core (100) and a rivet body (200), wherein the rivet core (100) is movably sleeved inside the rivet body (200), and the outer wall of the rivet core (100) is provided with a necking groove (101), characterized in that, include: A filling mechanism (300) is located between the rivet core (100) and the rivet body (200). The filling mechanism (300) includes a metal cylinder (310). An annular groove is provided at the top of the inner sidewall of the rivet body (200), and the metal cylinder (310) is fixedly sleeved inside the annular groove of the rivet body (200). The metal cylinder (310) is movably sleeved with the rivet core (100), and a plurality of slots (102) are provided on the outer sidewall of the rivet core (100). The auxiliary mechanism (400) is fixedly sleeved with the nail core (100).

2. The self-locking drum-shaped pull rivet with good fastening effect according to claim 1, characterized in that, The inner diameters at both ends of the metal cylinder (310) are larger than the inner diameter at the middle.

3. The self-locking drum-shaped blind rivet with good fastening effect according to claim 2, characterized in that, The outer wall of the metal cylinder (310) is provided with multiple deformation joints (311).

4. The self-locking drum-shaped blind rivet with good fastening effect according to any one of claims 1-3, characterized in that, The auxiliary mechanism (400) includes: The inner side wall of the top opening of the connecting tube (410) is fixedly sleeved with the top end of the nail core (100); The hoop (420) is fixedly sleeved to the outer wall of the connecting cylinder (410).

5. The self-locking drum-shaped blind rivet with good fastening effect according to claim 4, characterized in that, The outer wall of the connecting cylinder (410) is provided with multiple cutting grooves (411).

6. The self-locking drum-shaped blind rivet with good fastening effect according to claim 5, characterized in that, The bottom opening of the connecting cylinder (410) has a trumpet-shaped structure.

7. The self-locking drum-shaped blind rivet with good fastening effect according to claim 6, characterized in that, The diameter of the middle part of the rivet body (200) is smaller than the diameter of the top part, and multiple slots are opened in the middle part of the rivet body (200). A washer ring (210) is fixedly sleeved on the outer side wall of the rivet body (200).

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