All-iron round-head large-brim step hippocampus type self-plugging rivet

Abstract

The utility model discloses a full-iron round-head large-brim step hippocampus type self-plugging rivet which comprises a rivet body and a mandrel, the rivet body comprises a body, a rivet head and a large-brim flange, the inside of the rivet body is of a hollow structure, the mandrel is connected in the hollow body in an attached mode and fixed to the rivet head, threads connected with a rivet assembling tool are arranged on the lower portion of the mandrel, and the large-brim flange is arranged on the lower portion of the mandrel. A fracture part with a slightly smaller diameter is arranged at the upper part of the thread; and a double-step locking structure is arranged between the mandrel and the nail head. When a fastening part is effectively riveted, the occlusion degree of the rivet head and the rivet body is enhanced through mechanical double-step locking, so that the locking capacity is improved, the reworking cost and the uncontrollable cost caused by loosening or falling of the rivet head are avoided, meanwhile, water can be effectively prevented from flowing in, and the risk that an electric appliance is damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a full-iron round-head large-brim-step seahorse-shaped core-pulling rivet. Background Art

[0002] In the field of new energy vehicles, ordinary bolts and nuts cannot be used due to the requirements of volume, weight, strength, space, etc. Most of them use blind rivets for connection. It has the characteristics of light weight, more reliable connection, high strength, convenient and quick installation, and can be riveted unilaterally through a rivet gun. Therefore, in addition to the automotive field, blind rivets are also widely used in the assembly of mechanical and electrical and light industrial products such as aviation, instruments, furniture, and decoration.

[0003] After being connected for a long time, the existing blind rivets are prone to loosening and falling off due to the long-term vibration of the car. In addition, the nail heads of conventional products are locked with vertical teeth. When water flows through, it will seep in through the gaps between the vertical teeth, causing the risk of electrical short circuit, which brings certain adverse effects to people's use process. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to overcome the defects of the above-mentioned prior art and provide a blind rivet specially used for connecting the body of a new energy vehicle, which has reliable core shaft locking, good anti-loosening and sealing effects.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a full-iron round-head large-brim step seahorse-shaped core-pulling rivet, which is characterized in that: it comprises a rivet body and a mandrel, the rivet body comprises a main body, a rivet head and a large-brim flange, and the interior is a hollow structure, the mandrel is attached to the hollow main body and is pressed and connected with the rivet head, the lower part of the mandrel is provided with a thread connected with a rivet assembly tool, the upper part of the thread is provided with a fracture part with a slightly smaller diameter, and a double-step locking structure is provided between the mandrel and the rivet head.

[0006] Furthermore, the double-step locking structure includes a boss, a first step and a second step. The boss is arranged on one end of the core shaft close to the nail head, and the diameter of the boss is slightly smaller than the core shaft. The boss forms the first step and the second step with the lower end surface of the core shaft and the nail head respectively.

[0007] Furthermore, a punching hole is provided on the cap at the end of the large brim flange away from the nail head, so as to remove burr waste generated in the riveting process.

[0008] Furthermore, a convex deformation portion is provided in the middle of the main body of the rivet body so that the rivet body can be deformed better during riveting, thereby achieving rapid and effective riveting of the riveted plates.

[0009] Furthermore, the core shaft is provided with an axial locking groove at a position corresponding to the deformation portion, which plays an overall anti-slip and anti-displacement role in the thread rolling process, and also plays an anti-rotation and nail head locking function after riveting.

[0010] Furthermore, the rivet is suitable for riveted plates with a thickness of 4 to 7 mm.

[0011] The utility model of the all-iron round head large brim step seahorse type blind rivet has the following beneficial effects:

[0012] 1. While providing effective riveting for the fastening parts, a mechanical double-step locking is designed between the nail head and the mandrel to enhance the bite between the nail head and the rivet body, thereby improving the locking ability, eliminating the rework costs and uncontrollable costs caused by the loosening or falling of the nail head, and effectively preventing water from flowing in to avoid the risk of electrical damage;

[0013] 2. An axial locking groove is set on the mandrel to prevent slipping and displacement during the thread rolling process, and to prevent rotation and lock the nail head after riveting;

[0014] 3. An annular groove is provided at the bottom of the large brim flange to support the front end of the rivet assembly tool and ensure the stability of the riveting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

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

[0017] Figure 2 It is a front structural schematic diagram of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the connection between the rivet body and the mandrel of the utility model;

[0019] Figure 4 This is a state diagram of the utility model after being riveted with the riveted plate;

[0020] In the figure: 1. rivet body, 11. rivet head, 12. main body, 13. large brim flange, 2. mandrel, 3. boss, 31. first step, 32. second step, 4. deformation part, 5. fracture part, 6. punching hole on the cap, 7. locking groove, 8. riveting plate. DETAILED DESCRIPTION

[0021] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] The all-iron round head large brim step seahorse type blind rivet as shown in the figure includes a rivet body 1 and a mandrel 2. The rivet body 1 includes a nail head 11, a body 12 and a large brim flange 13, and the interior is a hollow structure. The mandrel 2 is attached to the hollow body 12 and is pressed and connected with the nail head 11. The lower part of the mandrel 2 is provided with a thread connected to the rivet assembly tool, and the upper part of the thread is provided with a fracture part 5 with a slightly smaller diameter. A double-step locking structure is provided between the mandrel 2 and the nail head 11 to enhance the bite between the nail head and the rivet body, thereby improving the locking ability, eliminating the rework costs and uncontrollable costs caused by the loosening or falling off of the nail head, and at the same time effectively preventing water from flowing in and avoiding the risk of damage to electrical appliances.

[0023] The double-step locking structure includes a boss 3, a first step 31 and a second step 32. The boss 3 is arranged on one end of the core shaft 2 close to the nail head 11, and the diameter of the boss 3 is slightly smaller than the core shaft 2. The boss 3 forms the first step 31 and the second step 32 with the lower end surfaces of the core shaft 2 and the nail head 11 respectively.

[0024] The large brim flange 13 is provided with a cap punching hole 6 at one end away from the nail head 11 for removing burr waste generated during the riveting process.

[0025] An outwardly convex deformation portion 4 is provided in the middle of the main body 12 of the rivet body 1, so that the rivet body can be better deformed when riveting, thereby realizing fast and effective riveting of the riveted plates. The core shaft 2 is provided with an axial locking groove 7 at a position corresponding to the deformation portion 4, which plays an overall anti-slip and anti-displacement role in the thread rolling process, and at the same time plays an anti-rotation and nail head locking function after riveting.

[0026] The rivet is suitable for riveting plates with a thickness of 4 to 7 mm.

[0027] The technical requirements for implementation are as follows:

[0028] 1. Material:

[0029] Rivet body material: 10B21; Nail core material: SWCH45K;

[0030] 2. Mechanical properties:

[0031] Shear load: ≥17KN; Tensile load: ≥10KN; Nail core breaking load: ≤24KN; Nail core removal force: ≥10N; Nail head retention capacity: ≥50N;

[0032] 3. Surface treatment:

[0033] Rivet body: electroplated zinc-nickel alloy trivalent natural color passivation; nail core: electroplated zinc-nickel alloy trivalent natural color passivation; coating thickness: 8-15um; nickel content: 12%-16%; neutral salt spray test: after hot storage at 120℃X24, no white rust for ≥144h, no red rust for ≥720h;

[0034] 4. Applicable riveting sheet metal thickness: 3mm~7mm, sheet metal opening size: Φ8.1mm~Φ8.3mm;

[0035] 5. Appearance:

[0036] The surface should be free of burrs and harmful defects, and have a complete head and rod shape; after riveting: defects such as head jumping, exposed nail core, nail head falling off, nail body pulling through, nail body skewness, rivet loosening, etc. are not allowed. During visual inspection, the rivet should not have any signs of cracking;

[0037] 6. The banned and restricted substances in products shall comply with the provisions of Q / JLJ16001 "Requirements for banned and restricted substances in automotive parts and materials".

[0038] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A full iron round head large brim step seahorse type blind rivet, characterized by: The invention comprises a rivet body (1) and a mandrel (2). The rivet body (1) comprises a nail head (11), a body (12) and a large brim flange (13), and is hollow inside. The mandrel (2) is attached to the hollow body (12) and is tightly connected to the nail head (11). The lower part of the mandrel (2) is provided with a thread connected to a rivet assembly tool, and the upper part of the thread is provided with a fracture part (5) with a slightly smaller diameter. A double-step locking structure is provided between the mandrel (2) and the nail head (11).

2. The all-iron round head large brim step seahorse type blind rivet according to claim 1 is characterized by: The double-step locking structure comprises a boss (3), a first step (31) and a second step (32); the boss (3) is arranged on an end of the core shaft (2) close to the nail head (11), and the diameter of the boss (3) is slightly smaller than that of the core shaft (2); the boss (3) forms the first step (31) and the second step (32) with the lower end surfaces of the core shaft (2) and the nail head (11), respectively.

3. The all-iron round head large brim step seahorse type blind rivet according to claim 1 is characterized by: The large brim flange (13) is provided with a cap punching hole (6) at one end away from the nail head (11) for removing burr waste generated during the riveting process.

4. The all-iron round head large brim step seahorse type blind rivet according to claim 1 is characterized by: An outwardly convex deformation portion (4) is provided in the middle of the main body (12) of the rivet body (1).

5. The all-iron round head large brim step seahorse type blind rivet according to claim 4 is characterized by: The core shaft (2) is provided with an axial locking groove (7) at a position corresponding to the deformation portion (4).

6. The all-iron round head large brim step seahorse type blind rivet according to claim 1 is characterized by: The rivet is suitable for riveting plates with a thickness of 4 to 7 mm.

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