Closed type oblate head self-plugging rivet

Abstract

The utility model relates to the technical field of self-plugging rivets, in particular to a closed type oblate head self-plugging rivet which comprises a rivet body and a rivet sleeve, the rivet sleeve is located on the outer surface of the rivet body, a sealing ring is installed on the outer surface of the rivet body, a clamping groove is formed in the side wall of the sealing ring, one side of the rivet sleeve is located in the clamping groove, and the other side of the rivet sleeve is located in the clamping groove. A fastening ring is installed on the outer surface of the sealing ring, and a plurality of open ring grooves are formed in the inner wall of the fastening ring and evenly distributed in an annular array. The closed type oblate head self-plugging rivet has the beneficial effects that the sealing ring and the fastening ring are used, the rivet body and the rivet sleeve are connected in a sealing mode through the sealing ring and the clamping groove, meanwhile, a workpiece can be clamped and fixed through the fastening ring, the situation that the rivet head directly screws the interior of the rivet sleeve with large strength is avoided, and the sealing effect is good. And the surface of the workpiece to be fastened is damaged.

Description

Technical Field

[0001] This utility model relates to the field of blind rivet technology, specifically a closed-type flat round head blind rivet. Background Technology

[0002] A rivet consists of a rivet body and a mandrel. During riveting, the mandrel is pulled out using a rivet gun, causing the rivet body to expand and form a strong mechanical connection. After riveting, the rivet body expands to form a reliable mechanical lock, making it suitable for applications subject to high loads. The closed-type flat round head blind rivet is a fastener that rivets from one side. The closed design effectively prevents leakage and is suitable for connections requiring airtight or liquid-tight sealing, as well as for applications where operation from both sides is not possible.

[0003] In the prior art, a closed-type flat round head blind rivet is tightened by screwing the rivet head at one end of the rivet body into the side wall of the rivet sleeve. The rivet sleeve is subjected to an outward expansion force due to the outward expansion of the rivet head, which generates an expansion force on the side end of the workpiece hole groove. When the tightening force is large, the corner of the side end of the workpiece hole groove is prone to breakage, affecting the overall performance of the workpiece.

[0004] Therefore, this utility model proposes a closed-type flat round head blind rivet to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a closed-type flat round head blind rivet to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a closed-type flat round head blind rivet, the closed-type flat round head blind rivet comprising: a rivet body and a rivet sleeve, the rivet sleeve being located on the outer surface of the rivet body, a sealing ring being installed on the outer surface of the rivet body, a groove being formed on the side wall of the sealing ring, one side of the rivet sleeve being located inside the groove, a fastening ring being installed on the outer surface of the sealing ring, and a plurality of open annular grooves being formed on the inner wall of the fastening ring, the open annular grooves being evenly distributed in a ring array.

[0007] Preferably, a movable ring is installed on the outer surface of the rivet body, and several long rods are installed on the side wall of the movable ring, with the long rods evenly distributed in a ring array.

[0008] Preferably, a locking rod is installed at one end of the long rod, and the locking rod passes into the interior of the open annular groove.

[0009] Preferably, a sealing ring is installed inside the slot, and a concave ring is installed at the center of the side wall of the sealing ring.

[0010] Preferably, a convex ring is installed on the side wall of the sealing ring, the convex ring and the concave ring are located on the same horizontal plane, and the convex ring is placed equidistantly on both sides of the concave ring.

[0011] Preferably, one side of the sealing ring is fixed to the inner wall of the slot, and the other side of the sealing ring is in contact with the side wall of the rivet sleeve.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention proposes a closed-type flat round head blind rivet that utilizes a sealing ring and a fastening ring. The sealing ring seals the rivet body and rivet sleeve through a groove, while the fastening ring clamps and fixes the workpiece, preventing the rivet head from directly twisting the inside of the rivet sleeve with excessive force, which could damage the surface of the workpiece to be fastened. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the closed-type flat round head blind rivet of this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the closed-type flat round head blind rivet of this utility model;

[0016] Figure 3 This utility model Figure 2 A magnified structural diagram of A in the middle;

[0017] Figure 4 This is a three-dimensional structural diagram showing the disassembled sealing ring and movable plate of this utility model.

[0018] In the diagram: 1. Rivet body; 2. Rivet sleeve; 3. Sealing ring; 4. Slot; 5. Fastening ring; 6. Open ring groove; 7. Movable ring; 8. Long rod; 9. Locking rod; 10. Sealing ring; 11. Concave ring; 12. Convex ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Example 1: Please refer to Figures 1 to 4This utility model provides a technical solution: a closed-type flat round head blind rivet, the closed-type flat round head blind rivet includes: a rivet body 1 and a rivet sleeve 2, the rivet sleeve 2 is located on the outer surface of the rivet body 1, a sealing ring 3 is installed on the outer surface of the rivet body 1, a groove 4 is opened on the side wall of the sealing ring 3, one side of the rivet sleeve 2 is located inside the groove 4, a fastening ring 5 is installed on the outer surface of the sealing ring 3, and a plurality of open ring grooves 6 are opened on the inner wall of the fastening ring 5, the open ring grooves 6 are evenly distributed in a ring array;

[0021] In use, the sealing ring 3 is fitted onto the outer surface of the rivet body 1 near the rivet head. The rivet body 1 is passed through the slot of the workpiece to be fastened, so that one side wall of the sealing ring 3 is in contact with the surface of the workpiece. The rivet sleeve 2 is fitted onto the surface of the rivet body 1 and inserted into the slot of the workpiece to be fastened, so that the inner end of the rivet sleeve 2 is placed inside the slot 4. The fastening ring 5 is fitted onto the outer surface of the sealing ring 3, and the rivet body 1 is tightened, so that the rivet head is tightened into the inside of the sealing ring 3 and the rivet sleeve 2. The rivet body 1 and the rivet sleeve 2 are tightened inside the workpiece, and the workpiece is clamped and fixed. This avoids the rivet head directly twisting the inside of the rivet sleeve with too much force, which could damage the surface of the workpiece to be fastened. At the same time, the inner wall of the fastening ring 5 can increase the extensibility of the fastening ring 5 through the open annular groove 6, which can improve the movement of the rivet body 1 into the rivet sleeve 2 while fixing the rivet tightly, thus increasing the sealing performance inside the rivet.

[0022] Example 2: Based on Example 1, a structure is provided to improve the fastening connection between the fastening ring 5 and the rivet body 1. A movable ring 7 is installed on the outer surface of the rivet body 1. Several long rods 8 are installed on the side wall of the movable ring 7. The long rods 8 are evenly distributed in a ring array. A locking rod 9 is installed at one end of the long rod 8. The locking rod 9 passes into the interior of the open ring groove 6.

[0023] In use, before tightening the rivet body 1, the movable ring 7 is placed on the outer surface of the rivet head of the rivet body 1, and the locking rod 8 is moved into the interior of the open ring groove 6. When the rivet body 1 is tightened, the rivet head expands into the interior of the sealing ring 3, causing the surface of the sealing ring 3 to expand and move the locking rod 8 outward. According to the lever principle, the long rod 8 is subjected to an inward force near the interior of the movable ring 7, which causes the movable ring 7 and the rivet head of the rivet body 1 to contract and clamp, thereby improving the fastening of the rivet.

[0024] Example 3: Based on Example 2, an improved sealing ring 3 and rivet sleeve 2 are provided. A sealing ring 10 is installed inside the groove 4. A concave ring 11 is installed at the center of the side wall of the sealing ring 10. A convex ring 12 is installed on the side wall of the sealing ring 10. The convex ring 12 and the concave ring 11 are located on the same horizontal plane, and the convex ring 12 is placed equidistantly on both sides of the concave ring 11. One side of the sealing ring 10 is fixed to the inner wall of the groove 4, and the other side of the sealing ring 10 is in contact with the side wall of the rivet sleeve 2.

[0025] In use, the inside of the groove 4 of the sealing ring 3 is fixed by the sealing ring 10, and the convex ring 11 and concave ring 12 on the surface of the sealing ring 10 form multiple cavities inside the groove 4. When one end of the rivet sleeve 2 is inserted into the inside of the groove 4, the surfaces of the convex ring 11 and the concave ring 12 can overlap and fit together through their curvature. After the side wall of the rivet sleeve 2 is in contact with the side wall of the convex ring 11 and the concave ring 12, the surface contact between the convex ring 11 and the concave ring 12 seals the inside of the groove 4, forming multiple cavities. After the rivet body 1 and the rivet sleeve 2 are tightened, the air inside the cavity is compressed, and the pressure inside the cavity increases. According to the law of conservation of energy, this will generate an outward force on the outer surface of the groove 4, so that the inner wall of the sealing ring 3 clamps and fixes the rivet body 1, which can increase the sealing performance of the rivet.

[0026] In actual use, the sealing ring 3 is fitted onto the outer surface of the rivet body 1 near the rivet head. The rivet body 1 is passed through the slot of the workpiece to be fastened, so that one side wall of the sealing ring 3 is in contact with the surface of the workpiece. The rivet sleeve 2 is fitted onto the surface of the rivet body 1 and inserted into the slot of the workpiece to be fastened, so that the inner end of the rivet sleeve 2 is placed inside the slot 4. The fastening ring 5 is fitted onto the outer surface of the sealing ring 3. Before tightening the rivet body 1, the movable ring 7 is fitted onto the outer surface of the rivet head of the rivet body 1. The locking rod 8 is moved into the interior of the open ring groove 6. The rivet body 1 is tightened, so that the rivet head is tightened into the interior of the sealing ring 3 and the rivet sleeve 2. The rivet body 1 and the rivet sleeve 2 are then tightened together. Inside the workpiece, the workpiece is clamped and fixed to avoid the rivet head directly twisting the inside of the rivet sleeve with too much force, which could damage the surface of the workpiece to be fastened. At the same time, the inner wall of the fastening ring 5 can increase the extensibility of the fastening ring 5 through the open ring groove 6, so that the rivet body 1 can move into the rivet sleeve 2 while the rivet is fixed tightly, increasing the sealing of the rivet. When the rivet body 1 is tightened, the rivet head expands into the inside of the sealing ring 3, causing the surface of the sealing ring 3 to expand and move the clamping rod 8 outward. According to the lever principle, the long rod 8 is subjected to an inward force near the inside of the movable ring 7, which causes the movable ring 7 and the rivet head of the rivet body 1 to contract and clamp, improving the fastening of the rivet.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A closed-type flat round head blind rivet, characterized in that: The closed-type flat round head blind rivet includes: a rivet body (1) and a rivet sleeve (2). The rivet sleeve (2) is located on the outer surface of the rivet body (1). A sealing ring (3) is installed on the outer surface of the rivet body (1). A groove (4) is opened on the side wall of the sealing ring (3). One side of the rivet sleeve (2) is located inside the groove (4). A fastening ring (5) is installed on the outer surface of the sealing ring (3). A plurality of open annular grooves (6) are opened on the inner wall of the fastening ring (5). The open annular grooves (6) are evenly distributed in a ring array.

2. The closed-type flat round head blind rivet according to claim 1, characterized in that: The outer surface of the rivet body (1) is fitted with a movable ring (7), and the side wall of the movable ring (7) is fitted with several long rods (8), which are evenly distributed in a ring array.

3. The closed-type flat round head blind rivet according to claim 2, characterized in that: One end of the long rod (8) is fitted with a locking rod (9), which is inserted into the interior of the open annular groove (6).

4. The closed-type flat round head blind rivet according to claim 1, characterized in that: A sealing ring (10) is installed inside the slot (4), and a concave ring (11) is installed at the center of the side wall of the sealing ring (10).

5. A closed-type flat round head blind rivet according to claim 4, characterized in that: The sealing ring (10) has a convex ring (12) installed on its side wall. The convex ring (12) and the concave ring (11) are located on the same horizontal plane, and the convex ring (12) is placed equidistantly on both sides of the concave ring (11).

6. A closed-type flat round head blind rivet according to claim 4, characterized in that: One side of the sealing ring (10) is fixed to the inner wall of the slot (4), and the other side of the sealing ring (10) is in contact with the side wall of the rivet sleeve (2).

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