Waterproof single drum type rivet

Abstract

The utility model discloses a waterproof single drum type rivet which comprises a rivet head and is characterized in that the upper end of the rivet head is fixedly connected with a rivet rod, the edge area of the upper surface of the rivet head is fixedly connected with a waterproof sealing ring, and the waterproof sealing ring is fixedly connected to the edge area of the upper surface of the rivet head. The sealing performance and the waterproof performance of the rivet after installation can be well improved, the rivet can be suitable for most parts, and protectiveness of various parts is enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to rivet technical field, in particular to a waterproof single drum type rivet. BACKGROUND

[0002] Rivets are nail-shaped objects used to connect two parts with holes, during the riveting process, the rivet is deformed by the rivet gun, and the two parts to be connected are fixed together, in the case of containers, vans, refrigerated vehicles and the like, the rivets used need to have waterproof sealing function;

[0003] The applicant found that a "waterproof single drum type rivet" was disclosed in a Chinese patent during the application of the present application, the application number of which is "202420184283.9", the patent mainly solves the problem that burrs are easily generated at the edges of parts, the rivet shell cannot be closely attached to the surface of the parts, resulting in poor sealing and waterproof performance, and the connection strength between the rivet and the parts after installation is low, which is prone to loosening or even falling off under the impact of water pressure in long-term activity occasions. Although the patent improves the connection strength, sealing and waterproof performance of the connecting parts, the waterproof performance of the waterproof single drum type rivet is not strong enough and has high limitations, because not all precision parts will have obvious burrs, and solving the burr problem cannot effectively enhance the waterproof performance of the rivet. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a waterproof single drum type rivet, which solves the problem of insufficient waterproof performance and high limitations of the waterproof rivet.

[0005] To achieve the above-mentioned purpose, a waterproof single drum type rivet is provided, which comprises a rivet head, the upper end of the rivet head is fixedly connected with a rivet shank, and the upper surface edge area of the rivet head is fixedly connected with a waterproof sealing ring.

[0006] According to the waterproof single drum type rivet, the upper end of the rivet shank is fixedly connected with a hat brim.

[0007] According to the waterproof single drum type rivet, the upper end of the hat brim is fixedly connected with a rivet core.

[0008] According to the waterproof single drum type rivet, the annular edge of the rivet core is provided with a friction layer.

[0009] According to the waterproof single drum type rivet, the lower end of the rivet core is a fracture layer.

[0010] The above scheme has the beneficial effect that the waterproof sealing ring is fixedly connected to the edge area of the upper surface of the nail head, so that the sealing property and waterproof property of the rivet after installation are improved, the waterproof type single drum rivet can be applied to most parts, and the protection of various parts is enhanced.

[0011] The additional aspects and advantages of the present application will be given in part in the following description, some will become apparent from the following description, or will be understood by those skilled in the art from the description of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0012] The present application will be further described below in combination with the drawings and embodiments.

[0013] Fig. 1 is a structural schematic view of the waterproof type single drum rivet of the present application;

[0014] Fig. 2 is a front view of the waterproof type single drum rivet of the present application;

[0015] Fig. 3 is a structural schematic view of the A place of the waterproof type single drum rivet of the present application;

[0016] LEGEND:

[0017] 1, nail head; 2, nail rod; 3, hat brim; 4, nail core; 5, friction layer; 6, fracture layer; 7, waterproof sealing ring. DETAILED DESCRIPTION

[0018] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with figures, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as the limitation of the protection scope of the present application.

[0019] REFERENCE Figs. 1-3The utility model discloses a waterproof single drum type rivet, which comprises a rivet head 1, a rivet shank 2 fixedly connected to the upper end of the rivet head 1, and a waterproof sealing ring 7 fixedly connected to the upper surface edge region of the rivet head 1. The waterproof sealing ring 7 is fixedly connected to the upper surface edge region of the rivet head 1, which can improve the sealing performance and waterproof performance of the rivet after installation, is applicable to most parts, and can enhance the protection of various parts. The effect of the rivet after riveting is improved. The waterproof sealing ring 7 on the single drum type rivet is the core component for realizing reliable waterproofing. The multiple sealing mechanisms block the liquid penetration path. The sealing ring (usually EPDM or fluorine rubber) deforms under pressure during the riveting process, fills the microscopic gap between the rivet body and the hole wall of the plate (compensates for the processing tolerance ±0.1 mm), and ensures that the contact pressure (>0.3 N / mm 2 ) is maintained under long-term vibration or temperature changes (0.5-5 MPa). The sealing ring is compressed by the rivet head flange, forming the first waterproof line (preventing vertical water penetration). After swelling, the sealing ring expands outward to fit the hole wall, forming the second waterproof line (preventing horizontal penetration). The fluorine rubber sealing ring is resistant to fuel oil, acid and alkali (such as automobile fuel tank applications). The silica gel sealing ring (-60℃-200℃) is suitable for aerospace thermal cycle environment. When the rivet gun pulls the rivet core 4, the rivet body swells and extrudes the sealing ring, making it radially expand to the hole wall (compression amount about 15%-25%). The rivet head flange is synchronously pressed, and the sealing ring is axially compressed (deformation rate 30%-40%). The rubber stress relaxation rate is less than 10% (after 1000 hours), maintaining the sealing pressure. In a vibrating environment (such as an automobile chassis), the sealing ring absorbs energy through viscoelastic damping to prevent fretting wear. The static sealing test can reach ISO 16525-2: 0.5 bar water pressure / 30 minutes without leakage. In the automobile industry, the sealing performance can be maintained after 50,000 vibration tests (SAE J2334). The salt spray test is 2000 hours (ASTM B117) + temperature shock 50 times; the new energy automobile battery box can use a fluorine rubber sealing ring + aluminum rivet to prevent electrolyte corrosion (IP69K level). The ship deck can use an ethylene propylene diene rubber (EPDM) sealing ring, which is resistant to seawater immersion (>15 years). The 5G base station antenna can use a silica gel sealing ring, which is suitable for -40℃-85℃ daily temperature difference cycles. The waterproof sealing ring 7 of the single drum type rivet is the key to waterproof riveting through the comprehensive effect of elastic deformation, multiple sealing, and material science. When selecting, attention should be paid to the compression rate (20%-30% is the ideal interval), medium compatibility (chemical contact test is essential), and dynamic working condition adaptation (vibration, thermal cycle parameters). In the future, self-sensing and self-repairing sealing rings will be combined with Internet of Things technology to realize predictive maintenance.

[0020] The upper end of the shank 2 is fixedly connected with a brim 3, the upper end of the brim 3 is fixedly connected with a core 4, the annular edge of the core 4 is provided with a friction layer 5, and the lower end of the core 4 is a fracture layer 6. The following effects can be achieved by providing the friction layer 5 on the core 4: the friction layer 5 on the single-drum rivet core 4 is the key design for realizing efficient installation and stable performance. The friction behavior is precisely controlled to optimize the riveting process. The friction layer 5 adjusts the friction coefficient between the core 4 and the inner wall of the shank (usually controlled at 0.08-0.15), ensures that the tensile fracture force fluctuation is ≤±5% (such as the standard 3mm rivet tensile fracture force 4kN±200N), the friction layer 5 forms a friction gradient at the tensile fracture groove, guides the fracture to occur at the predetermined position (avoids the residual core 4 being too long), the nano-lubricating layer (such as graphene) reduces the pulling resistance by 30%-40%, prolongs the service life of the electric riveter (such as Bosch GSR 12V-EC, the endurance is improved by 50%), under high-temperature working conditions (such as automobile exhaust pipes), the PTFE coating prevents the core 4 from sintering with the aluminum shank (>300℃ still effective), the friction layer 5 balances the extraction speed of the core 4 and the deformation rate of the shank, so that the deviation of the bulge roundness is ≤5% (ordinary rivets often reach 15%), the high-damping coating (such as containing ceramic particles) absorbs the elastic vibration in the riveting instant, prevents the bulge from relaxing, after 1000 times of continuous riveting, the wear amount of the coating is ≤5μm (detected by a laser profilometer), after 500 hours of salt spray test, the friction coefficient changes by only ≤10% (ISO 9227), and the tensile fracture force only decays by ≤15% at-40℃ low temperature (automobile polar circle working condition); the aluminum shank is preferably PTFE type (anti-electric couple corrosion), the steel shank can use MoS2, the high-frequency riveting (>50 times / minute) first chooses the wear-resistant WC-Co coating, the civilian level preferably chooses the manganese phosphate film (0.02 / rivet), the military level uses DLC (0.02 / rivet), the military level uses DLC (0.8 / rivet), and the friction layer 5 of the single-drum rivet core 4 is a combination of precision mechanics and material science. The core value lies in process stability (precise control of the tensile fracture process), energy efficiency optimization (reduction of installation energy consumption), and quality consistency (improvement of bulge forming quality). The future trend is an intelligent response coating that can dynamically adjust the friction characteristics according to real-time working conditions, further breaking through the riveting process limit.

[0021] Working principle: when the single-drum rivet is riveted, the core 4 is pulled by the riveter to make the shank 2 expand to form a bulge. The bulge is usually round, the rivet body fully expands at the riveting blind area (the bottom of the riveting plate), can evenly stick to the riveting plate, provides waterproof performance on the back, and can make the steel plate or plastic part not deformed after riveting. Under the elastic action of the waterproof sealing ring 7, the expanded shank 2 can be better wrapped and sealed, so that the rivet can achieve better waterproof sealing effect.

[0022] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possesses without departing from the utility model's tenet under the precondition that the knowledge range that the person skilled in the art has possesses.

Claims

1. A waterproof single-drum rivet, comprising: The utility model relates to a nail head (1), its characterized in be fixedly connected with the nail stem (2) in the upper end of nail head (1), the upper surface edge area of nail head (1) is fixedly connected with waterproof sealing ring (7).

2. The waterproof single-drum rivet according to claim 1, characterized in that, The upper end of the nail stem (2) is fixedly connected with a brim (3).

3. The waterproof single-drum rivet according to claim 2, characterized in that, The upper end of the brim (3) is fixedly connected with a nail core (4).

4. The waterproof single-drum rivet according to claim 3, characterized in that, The annular edge of the nail core (4) is provided with a friction layer (5).

5. The waterproof single-drum rivet according to claim 3, characterized in that, The lower end of the nail core (4) is a fracture layer (6).

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