Blind rivet

Abstract

The utility model discloses a self-plugging rivet, which relates to the technical field of rivets, and comprises a core rod and a driving ring, the upper part of the core rod is sleeved with a rivet sleeve, a ring and a rivet body, the top of the rivet body is arranged between the core rod and the rivet sleeve, the ring is arranged between the rivet body and the rivet sleeve, and the inner side of the bottom of the rivet body is provided with a lock ring reserved groove for placing a lock ring; the locking ring is arranged on the inner side of the driving ring, and the lower portion of the core rod is sleeved with the locking ring and the driving ring. According to the utility model, the processing cost can be reduced under the condition that the riveting quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to rivet technical field, specifically a kind of core rivet. BACKGROUND

[0002] At present, China's aviation industry is at the forefront of the world, still faces some challenges, and technical innovation and independent research and development are the bottleneck of existing aviation field, and in the uncertainty of regional safety environment, there are some potential conflicts. This is a new challenge to aviation industry.

[0003] In the aviation aspect, the connection mode used mainly is thread connection and riveting, and the reliability of riveting to assembled parts is increasingly required to be high in installation efficiency, and with the breakthrough of localization of products completely dependent on imports, higher requirements are put forward for cost control. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the insufficient of prior art, providing a kind of core rivet under the basis condition of high efficiency and cost reduction, reduce the cost in processing process, realize the efficient mode.

[0005] The utility model aims at overcoming the insufficient of prior art, providing a kind of core rivet under the basis condition of high efficiency and cost reduction, reduce the cost in processing process, realize the efficient mode.

[0006] The lock ring is arranged on the inner side of the driving ring, and the lock ring and the driving ring are both sleeved on the lower part of the core rod.

[0007] The top of the rivet body is a closed end, the bottom of the rivet body is an expanded end, and the outer diameter of the expanded end is larger than that of the closed end.

[0008] The lock ring pre-reserved groove is arranged on the inner side of the expanded end, and the inner side of the expanded end is further provided with a groove with a triangular cross section, facilitating the deep insertion of the lock ring into the lock ring pre-reserved groove.

[0009] The core rod comprises a first rod, a second rod, a third rod, a closed end rod and a wrenching rod, the outer diameter of the first rod is larger than that of the second rod, the outer diameter of the second rod is larger than that of the third rod, the rivet sleeve is sleeved on the outer side of the second rod and the third rod, and the top of the rivet sleeve is fixedly connected with the first rod.

[0010] The bottom inner side of the rivet sleeve is provided with a groove for placing the ring.

[0011] The lock ring is made of easily expandable material, and the lock ring is provided with a fracture to facilitate expansion.

[0012] The core rod, the nail sleeve, the nail body and the driving ring are all made of titanium alloy material, have high strength and excellent corrosion resistance, the ring is made of polyformal material, and the temperature of the ring rises during rotation of the driving ring, and the polyformal material expands when the temperature changes.

[0013] The utility model discloses the beneficial effect is:

[0014] 1, the utility model discloses a lock ring is thoroughly entered between the nail body and the core rod lock ring reserved groove, and expands thoroughly locks the nail body and the core rod, reaches lock ring part can form safe self -locking structure, guarantees reliable connection integrity.

[0015] 2, the utility model discloses can realize the connection and fastening at narrow space, can realize quick installation, and installation efficiency is very high, can be used to the connection and fastening at composite material and metal structure, satisfies 0~7° inclined plane's installation. DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of the utility model;

[0017] Figure 2 It is the structural schematic diagram of the core rod;

[0018] Figure 3 It is the structural schematic diagram of the nail sleeve;

[0019] Figure 4 It is the structural schematic diagram of the ring;

[0020] Figure 5 It is the structural schematic diagram of the nail body;

[0021] Figure 6 It is the structural schematic diagram of the lock ring;

[0022] Figure 7 It is the structural schematic diagram of the driving ring;

[0023] In the drawing: 1 - core rod, 2 - nail sleeve, 3 - ring, 4 - nail body, 5 - lock ring, 6 - driving ring, 7 - first part rod, 8 - second part rod, 9 - third part rod, 10 - close -up part rod, 11 - twist part rod. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] In one embodiment of this application:

[0027] like Figures 1 to 7 As shown, a blind rivet includes a core rod 1 and a drive ring 6. The upper part of the core rod 1 is fitted with a rivet sleeve 2, a ring 3 and a rivet body 4. The top of the rivet body 4 is located between the core rod 1 and the rivet sleeve 2. The ring 3 is located between the rivet body 4 and the rivet sleeve 2. The bottom inner side of the rivet body 4 is provided with a locking ring reserved groove for placing a locking ring 5.

[0028] The locking ring 5 is located inside the drive ring 6, and both the locking ring 5 and the drive ring 6 are fitted onto the lower part of the core rod 1.

[0029] The top of the nail body 4 is constricted, and the bottom of the nail body 4 is flared. The outer diameter of the flared part is larger than the outer diameter of the constricted part.

[0030] The locking ring is reserved in the inner side of the flared opening, and the inner circumferential side of the flared opening is also provided with a groove with a triangular cross-section.

[0031] The core rod 1 includes a first rod 7, a second rod 8, a third rod 9, a closing rod 10, and a wrench rod 11. The outer diameter of the first rod 7 is larger than the outer diameter of the second rod 8, and the outer diameter of the second rod 8 is larger than the outer diameter of the third rod 9. The nail sleeve 2 is fitted on the outside of the second rod 8 and the third rod 9, and the top of the nail sleeve 2 is fixedly connected to the first rod 7.

[0032] The bottom inner side of the nail sleeve 2 is provided with a groove for placing the ring 3.

[0033] The locking ring 5 is made of an easily expandable material and has a break. A qualified rivet is inserted into the opening in the sandwich panel, with the rivet support surface in contact with the mounting surface. The rivet gun head clamps the drive ring 6, and the rivet gun's pull head engages with the wrench 11 of the core rod 1. By pressing the rivet gun button, the pull head rotates, causing the drive ring 6 and locking ring 5 to rotate, thus completing the riveting process. During riveting, the drive ring 6 slides along the core rod 1 towards the bottom of the nail body 4, driving the locking ring 5 forward to embed into the locking ring pre-drilled groove at the bottom of the nail body 4. During embedding, the rivet gun's pull head continues to rotate, and the drive ring 6 and locking ring 5 continue to move forward along the core rod 1, pushing... As the moving nail body 4 moves forward, the top of the nail body 4 is deeply inserted between the core rod 1 and the ring 3. At the same time, the top of the nail body 4 expands the bottom of the nail sleeve 2 and the ring 3 outward until the locking ring 5 is completely embedded in the locking ring groove at the bottom of the nail body 4. The locking ring 5 expands and completely locks the nail body 4 and the core rod 1. However, at this time, the rivet gun head continues to apply a rotational force to the drive ring 6. The weakest point of the core rod 1 (i.e., the junction of the closing part rod 10 and the wrench part rod 11) will break. The wrench part rod 11 will be twisted off by the rotating rivet gun head, and the broken wrench part rod 11 and the drive ring 6 on it can be discarded.

[0034] In another embodiment of this application:

[0035] Based on the previous embodiment, this embodiment improves the materials of the core rod 1, nail sleeve 2, ring 3, nail body 4, locking ring 5, and drive ring 6. The core rod 1 is made of TB9 titanium alloy, the nail sleeve 2, nail body 4, and drive ring 6 are all made of CP titanium alloy, the locking ring 5 is made of A286 high-temperature alloy, which has long-term creep resistance, high strength, and corrosion resistance, and the ring 3 is made of polyoxymethylene. During the rotation of the drive ring 6, the temperature of the ring 3 will rise, and the polyoxymethylene material will expand when the temperature changes.

[0036] The above description is merely an embodiment of this utility model. It should be understood that this utility model is not limited to the form disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A blind rivet, characterized in that: Includes a core rod (1) and a drive ring (6). The core rod (1) is fitted with a nail sleeve (2), a ring (3) and a nail body (4). The top of the nail body (4) is located between the core rod (1) and the nail sleeve (2). The ring (3) is located between the nail body (4) and the nail sleeve (2). The bottom inner side of the nail body (4) is provided with a lock ring reserved groove for placing a lock ring (5). The locking ring (5) is located inside the drive ring (6), and both the locking ring (5) and the drive ring (6) are fitted onto the lower part of the core rod (1).

2. The blind rivet according to claim 1, characterized in that: The top of the nail body (4) is constricted, and the bottom of the nail body (4) is flared, with the outer diameter of the flared opening being larger than that of the constricted opening.

3. The blind rivet according to claim 2, characterized in that: The locking ring pre-reserved groove is set on the inside of the flared opening, and the inner circumferential side of the flared opening is also provided with a groove with a triangular cross-section.

4. The blind rivet according to claim 1, characterized in that: The core rod (1) includes a first rod (7), a second rod (8), a third rod (9), a closing rod (10), and a wrench rod (11). The outer diameter of the first rod (7) is larger than the outer diameter of the second rod (8), and the outer diameter of the second rod (8) is larger than the outer diameter of the third rod (9). The nail sleeve (2) is fitted on the outside of the second rod (8) and the third rod (9), and the top of the nail sleeve (2) is fixedly connected to the first rod (7).

5. The blind rivet according to claim 4, characterized in that: The bottom inner side of the nail sleeve (2) is provided with a groove for placing the ring (3).

6. The blind rivet according to claim 1, characterized in that: The locking ring (5) is provided with a break.

7. The blind rivet according to claim 6, characterized in that: The locking ring (5) is made of an easily expandable material.

8. The blind rivet according to claim 7, characterized in that: The core rod (1), nail sleeve (2), nail body (4) and drive ring (6) are all made of titanium alloy, and the ring (3) is made of polyoxymethylene.

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