CN216812437U

CN216812437U - Internal locking garland rivet

Info

Publication number: CN216812437U
Application number: CN202220348755.0U
Authority: CN
Inventors: 焦道军; 魏海艳
Original assignee: Anhui Lexiang Precision Hardware Co ltd
Current assignee: Wuhan Yiyang Hardware Products Co.,Ltd.
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-06-24
Anticipated expiration: 2032-02-21

Abstract

The utility model discloses an internal locking garland rivet, which belongs to the technical field of rivets and comprises a rivet core and a rivet head arranged at the upper end of the rivet core, wherein a rivet body is sleeved outside the rivet core, the bottom surface of the rivet head is in an annular shape, a plurality of prismatic knives with pre-stress cutting force are arranged at equal intervals, the rivet body consists of a fly head part and a limiting part, the limiting part is connected to the lower end of the fly head part, and the upper end of the fly head part is provided with a fly head structure contacted with the prismatic knives. The utility model improves the cutting mode of the existing garland rivet, and has the advantages of easy manufacture, low stress, easy forming and low breakage rate compared with the garland mode in the prior art by increasing the cutting structure and improving the stress structure, in particular to an enlarged edge cutter and gradual cutting.

Description

Internal locking garland rivet

Technical Field

The utility model relates to the technical field of rivets, in particular to an internally-locked garland rivet.

Background

The existing garlands rivet is provided with a plurality of bead knife edges with downward sharp angles through uniformly distributing on the bottom surface of a pin head, and is used for cutting the outer wall of a rivet body to be broken, so that garlands extending uniformly and outwards are formed.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The utility model aims to provide an internally-locked garland rivet to solve the problems in the background technology.

2. Technical scheme

An internal locking garland rivet comprises a rivet core and a rivet head arranged at the upper end of the rivet core, wherein a rivet body is sleeved on the outer side of the rivet core, the bottom of the rivet head is in an annular shape and is provided with a plurality of prismatic knives with pre-stress cutting force at equal intervals, the rivet body comprises a flying head part and a limiting part, the limiting part is connected to the lower end of the flying head part, and a flying head structure in contact with the prismatic knives is arranged at the upper end of the flying head part.

Preferably, a limiting groove is formed in the nail core, and a limiting protrusion in clamping fit with the limiting groove is arranged in the limiting portion.

Preferably, the edge cutter comprises a prepressing part and a cutting part, the upper end of the cutting part is connected with the bottom surface of the nail head, the upper end of the prepressing part is connected with the lower end of the cutting part, and the lower end of the prepressing part extends onto the nail core.

Preferably, the prepressing part is of a wedge-shaped structure with a wide upper part and a narrow lower part, and the extrusion force of the wedge edge of the prepressing part and the flywheel structure during upward sliding is gradually increased.

Preferably, the distance from the cutting surface of the cutting part to the vertical center line of the mandrel is matched with the radius of the head structure.

Preferably, the aircraft nose structure is including being the angular groove of annular equidistant seting up in aircraft nose top surface, angular groove quantity and arris sword quantity adaptation.

Preferably, the corner groove is one of a triangular groove and a heart-shaped groove.

Preferably, the flying head structure further comprises a circular platform groove arranged on the inner wall of the upper end of the flying head part, and the circular platform groove is of an inverted circular platform structure.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages that:

the utility model improves the cutting mode of the existing garland rivet, and has the advantages of easy manufacture, low stress, easy forming and low breakage rate compared with the garland mode in the prior art by increasing the cutting structure and improving the stress structure, in particular to an enlarged edge cutter and gradual cutting.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the overall structure of the present invention;

FIG. 3 is a schematic view of the nail body of the present invention;

FIG. 4 is a schematic view of the core pin and its connection structure of the present invention;

the reference numbers in the figures illustrate: 1. a nail core; 101. a limiting groove; 2. a nail head; 3. a nail body; 4. a prism cutter; 401. a prepressing section; 402. a cutting section; 5. a fly head portion; 6. a limiting part; 601. a limiting bulge; 7. a fly head structure; 701. an angular groove; 702. a circular table groove.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Referring to fig. 1-4, the present invention provides a technical solution:

the utility model provides an internal locking garland rivet, includes core 1 and locates pin fin 2 of core 1 upper end, and 1 outside cover of core is equipped with the

nail body

3, and 2 bottom surfaces of pin fin are annular equidistant a plurality of arris sword 4 that have the cutting power of answering in advance, and the nail body 3 comprises flying head 5 and spacing portion 6, and spacing portion 6 is connected in flying head 5 lower extreme, flies 5 upper ends of head and is equipped with the first 7 of flying head structure with arris sword 4 contact. The utility model improves the cutting mode of the existing garland rivet, and has the advantages of easy manufacture, low stress, easy forming and low breakage rate compared with the garland mode in the prior art by increasing the cutting structure and improving the stress structure, in particular to the enlarged edge cutter 4 and gradual cutting.

Specifically, a limiting groove 101 is formed in the nail core 1, and a limiting protrusion 601 clamped and matched with the limiting groove 101 is arranged in the limiting portion 6. The internal locking of the nail core 1 and the nail body 3 is realized through the clamping matching of the limiting protrusion 601 and the limiting groove 101.

Further, the edge knife 4 comprises a prepressing part 401 and a cutting part 402, the upper end of the cutting part 402 is connected with the bottom surface of the nail head 2, the upper end of the prepressing part 401 is connected with the lower end of the cutting part 402, and the lower end of the prepressing part 401 extends to the nail core 1. Compared with the ribbed knife edge with a tiny structure and tough hardness in the prior art, the ribbed knife 4 disclosed by the utility model has the advantages that the manufacturing difficulty is reduced and the cutting stress is low by enlarging the structure and arranging the gradually-changed tangent plane.

Still further, the prepressing section 401 is a wedge-shaped structure with a wide top and a narrow bottom, and the pressing force when the wedge edge of the prepressing section 401 and the fly head structure 7 slide upward is gradually increased. The stress of the fly head part 5 is gradually increased through the gradually changed tangent plane, the pull loss rate is reduced, and the forming stability is improved.

Further, the distance from the cutting surface of the cutting part 402 to the vertical center line of the mandrel 1 is matched with the radius of the fly head structure 7.

It should be noted that the nose structure 7 includes angular grooves 701 formed on the top surface of the nose portion 5 at equal intervals in a ring shape, and the number of the angular grooves 701 is adapted to the number of the edge blades 4.

It is noted that the corner groove 701 is one of a triangular groove and a heart-shaped groove.

In addition, the flying head structure 7 further includes a circular truncated cone groove 702 formed in the inner wall of the upper end of the flying head portion 5, and the circular truncated cone groove 702 is of an inverted circular truncated cone structure. The design of the circular truncated cone groove 702 is to form a gradual contact structure with the wedge edge of the prepressing portion 401, which is beneficial to the pattern drawing forming of the flyer head portion 5.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an internal locking garland rivet, includes mandrel (1) and locates pin fin (2) of mandrel (1) upper end, mandrel (1) outside cover is equipped with the nail body (3), its characterized in that: the bottom surface of the nail head (2) is provided with a plurality of arris cutters (4) with pre-stress cutting force at equal intervals in an annular shape, the nail body (3) is composed of a flying head part (5) and a limiting part (6), the limiting part (6) is connected to the lower end of the flying head part (5), and the upper end of the flying head part (5) is provided with a flying head structure (7) contacted with the arris cutters (4).

2. An internally latchable rivet according to claim 1, characterized in that: the nail core (1) is provided with a limiting groove (101), and a limiting bulge (601) in clamping fit with the limiting groove (101) is arranged in the limiting portion (6).

3. An internally latchable rivet according to claim 1, characterized in that: the edge knife (4) comprises a prepressing portion (401) and a cutting portion (402), the upper end of the cutting portion (402) is connected with the bottom surface of the nail head (2), the upper end of the prepressing portion (401) is connected with the lower end of the cutting portion (402), and the lower end of the prepressing portion (401) extends to the nail core (1).

4. An internally latchable rivet according to claim 3, characterized in that: the prepressing part (401) is of a wedge-shaped structure with a wide upper part and a narrow lower part, and the extrusion force of the wedge edge of the prepressing part (401) and the flywheel structure (7) during upward sliding is gradually increased.

5. An internally latchable pull rivet according to claim 3, characterised in that: the distance from the cutting surface of the cutting part (402) to the vertical central line of the nail core (1) is matched with the radius of the fly head structure (7).

6. An internally latchable rivet according to claim 3, characterized in that: the flyer head structure (7) comprises angle grooves (701) which are annular and are arranged on the top surface of the flyer head part (5) at equal intervals, and the number of the angle grooves (701) is matched with the number of the edge cutters (4).

7. An internally latchable rivet according to claim 6, wherein: the corner groove (701) is one of a triangular groove and a heart-shaped groove.

8. An internally latchable rivet according to claim 6, wherein: the flying head structure (7) further comprises a circular table groove (702) arranged on the inner wall of the upper end of the flying head part (5), and the circular table groove (702) is of an inverted circular table structure.