Double-drum type self-plugging rivet

Abstract

The utility model relates to the technical field of double-drum type self-plugging rivets, and discloses a double-drum type self-plugging rivet which comprises a rivet body, a conical flaring is formed in the bottom of the rivet body, and a core rod is slidably connected into the rivet body. According to the double-drum type self-plugging rivet, the conical flaring, the bottom plate and the barbs are arranged, so that the rivet can be pressed by the bottom plate when the rivet deforms, the barbs penetrate into the bottom of a material, the stability of fixation between the rivet and the material is improved, the locking ring in threaded connection with the core rod is arranged, and the abutting ring is arranged at the bottom of the locking ring; by arranging a limiting ring in threaded connection with the rivet body, the mounting length of the rivet can be adjusted according to the length of a hole, the rivet is matched with holes with different lengths, and the stability of the rivet after mounting is further improved; the problems that an existing single-drum rivet is poor in connection strength and durability, and connection is not reliable possibly due to the fact that the thicknesses are inconsistent in the connection process of multiple layers of materials are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of double-drum core-pulling rivets, in particular to a double-drum core-pulling rivet. BACKGROUND

[0002] The double-drum core-pulling rivet is a special fastener mainly used for single-side riveting and suitable for occasions where ordinary rivets cannot be used. Its working principle is to use a special tool, i.e. a rivet gun (manual, electric or pneumatic), to pull the core of the rivet so that the rivet body expands, thereby achieving the riveting effect.

[0003] During the riveting process, the core of the double-drum core-pulling rivet pulls the end of the rivet body into a double-drum-shaped rivet head, thereby clamping the two structure members to be riveted and reducing the pressure on the surface of the structure members. This design makes the riveted structure more stable and is suitable for the connection of low-strength or thin plate materials. The double-drum core-pulling rivet is widely used in products such as buildings, automobiles, ships, aircraft, machines, electrical appliances and furniture, and is favored due to its convenience of use, high efficiency, low noise, good waterproofness and reduction of labor intensity.

[0004] Although the existing single-drum core-pulling rivet is simple to operate, it has obvious deficiencies in connection strength and durability, especially in environments with high load bearing or frequent vibration, which can easily cause loosening or even breakage. In addition, the single-drum core-pulling rivet may not be reliable in connecting materials with inconsistent thicknesses. CONTENT OF THE INVENTION

[0005] In view of the deficiencies of the prior art, the present application provides a double-drum core-pulling rivet which can reinforce the rivet, avoid easy loosening of the rivet, improve the strength and stability of the rivet, adjust the installation length of the rivet according to the length of the hole, adapt the rivet to different holes, and further improve the stability of the rivet after installation. The present application solves the problems of obvious deficiencies in connection strength and durability of the existing single-drum rivet, especially in environments with high load bearing or frequent vibration, which can easily cause loosening or even breakage. In addition, the single-drum core-pulling rivet may not be reliable in connecting materials with inconsistent thicknesses.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a double-drum core-pulling rivet, comprising a rivet body, wherein the bottom of the rivet body is provided with a conical flared portion, the inside of the rivet body is slidably connected with a core rod, the bottom surface of the core rod is fixedly connected with a bottom plate, the upper surface of the bottom plate is fixedly connected with equidistantly arranged barbs, the outer circumferential surface of the core rod is threadedly connected with a locking ring, the bottom surface of the locking ring is fixedly connected with a pressing ring, and the top end of the outer circumferential surface of the rivet body is threadedly connected with a limiting ring.

[0007] Through the above scheme, since the existing single drum rivet has obvious defects in connection strength and durability, especially in the environment of bearing higher load or frequent vibration, it is easy to loosen or even break, in addition, the single drum type core rivet in the connection of multi-layer materials, the thickness is not consistent, which may cause unreliable connection, by setting the tapered flared, bottom plate, barb, prompting the rivet to be pressed tightly by the bottom plate when deforming, and the barb is stabbed into the bottom of the material, the stability between the rivet and the material is improved, the rivet is avoided to loosen easily, by setting the locking ring connected with the core rod thread, and setting the abutting ring at the bottom of the locking ring, prompting the rivet and the material to be further pressed, the stability of the rivet is improved, by setting the limiting ring threadedly connected with the rivet body, prompting the installation length of the rivet to be adjusted according to the length of the hole, and the length of the hole is adapted, the stability of the rivet after installation is further improved.

[0008] Further, the outer circumferential surface of the core rod is fixedly sleeved with a snap ring, and the outer wall diameter of the snap ring is greater than the inner wall diameter of the rivet body.

[0009] Through the above scheme, the snap ring can ensure the expansion of the rivet body during the drawing process of the core rod, enlarge the diameter of the bottom of the rivet body, prompt the area of the double drum to be larger when the rivet body deforms, and further the friction area with the bottom of the material is larger, the stability of the rivet body after installation is improved.

[0010] Further, the threaded portion of the rivet body is made of steel material, and the limiting ring is made of steel material.

[0011] Through the above scheme, the threaded portion of the rivet body and the limiting ring threadedly connected with it made of steel material have higher strength and stability, can bear larger pressure and load, avoid the threaded portion of the rivet body from deforming during the fixing process of the rivet, cause the limiting ring to slip, improve the stability of the limiting ring and the stability of the rivet body after installation, at the same time, the steel material also has good corrosion resistance, avoid the threaded portion of the rivet body and the limiting ring from easily corroding during use, improve the durability of the rivet.

[0012] Further, the outer circumferential surface of the limiting ring is provided with equally spaced anti-skid grooves.

[0013] Through the above scheme, the anti-skid grooves on the limiting ring can increase the friction between the hands or external tools, facilitate the installation and disassembly of the limiting ring, provide convenience for the user, and improve the practicality of the rivet.

[0014] Further, the outer circumferential surface of the locking ring is provided with equally spaced anti-skid grooves.

[0015] Through the above scheme, the anti-skid grooves on the locking ring can increase the friction between the hands or external tools, facilitate the installation and disassembly of the locking ring, provide convenience for the user, and improve the practicality of the rivet.

[0016] Further, the bottom of the rivet body is made of aluminum alloy material.

[0017] Through the above scheme, the bottom of the rivet body made of aluminum alloy material can reduce the weight of the rivet, avoid the rivet from having a greater impact on the weight of the material after installation, and better produce deformation to form a double-drum structure, facilitating the installation of the rivet. Meanwhile, the bottom of the rivet body made of aluminum alloy material also has good corrosion resistance, avoiding the rivet from being easily corroded during use and improving the durability of the rivet.

[0018] Further, the bottom plate is made of steel material, the barbs are arranged in a ring shape, and the barbs are made of steel material.

[0019] Through the above scheme, the bottom plate and the barbs made of steel material have higher strength and stability, can withstand greater pressure and load, avoid deformation of the bottom plate and the barbs during rivet fixing, improve the stability of the rivet body after installation, and also avoid the bottom plate and the barbs from being easily corroded, thereby improving the durability of the rivet. The barbs arranged in a ring shape can be evenly pierced into the bottom of the material, promoting uniform stress.

[0020] Further, the barbs are arranged in parallel with the core rod.

[0021] Through the above scheme, the barbs can be vertically pierced into the bottom of the material to limit the rivet, avoid the rivet from being easily loosened, and improve the stability of the rivet and the material.

[0022] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0023] The double-drum type core-pulling rivet is provided with a tapered flared portion, a bottom plate, and barbs, so that the rivet can be compressed by the bottom plate and the barbs can be pierced into the bottom of the material when the rivet deforms, improving the stability of the rivet and the material, avoiding the rivet from being easily loosened, and further compressing the rivet and the material by arranging a locking ring threadedly connected with the core rod and arranging a pressing ring at the bottom of the locking ring, thereby improving the stability of the rivet. The length of the rivet can be adjusted according to the length of the hole to adapt to holes of different lengths, further improving the stability of the rivet after installation, solving the obvious deficiencies of the existing single-drum rivet in connection strength and durability, and the problem that the single-drum type core-pulling rivet may cause unreliable connection in the connection of materials of different thicknesses. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a whole three-dimensional structure diagram of the present application;

[0025] Figure 2 It is a whole structure diagram of the rivet body of the present application;

[0026] Figure 3 is a sectional structure diagram of the whole application;

[0027] Figure 4 is a sectional front structure diagram of the application.

[0028] In the figure:

[0029] 1, rivet body; 2, conical flared; 3, core rod; 4, bottom plate; 5, barb; 6, locking ring; 7, limiting ring; 8, abutting ring; 9, snap ring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3 , a double-drum type core-pulling rivet in the embodiment includes a rivet body 1, the bottom of the rivet body 1 is provided with a conical flared 2, the inside of the rivet body 1 is slidingly connected with a core rod 3, the bottom surface of the core rod 3 is fixedly connected with a bottom plate 4, the upper surface of the bottom plate 4 is fixedly connected with equidistantly arranged barbs 5, the outer circumferential surface of the core rod 3 is threadedly connected with a locking ring 6, the bottom surface of the locking ring 6 is fixedly connected with an abutting ring 8, and the top end of the outer circumferential surface of the rivet body 1 is threadedly connected with a limiting ring 7.

[0032] Please refer to Figure 3 and Figure 4 , the outer circumferential surface of the core rod 3 is fixedly sleeved with a snap ring 9, the outer wall diameter of the snap ring 9 is greater than the inner wall diameter of the rivet body 1, the snap ring 9 can ensure the expansion of the rivet body 1 in the process of pulling the core rod 3, expand the diameter of the bottom of the rivet body 1, and promote the area of the double drum to be larger when the rivet body 1 deforms, so as to further increase the friction area with the bottom of the material, and improve the stability of the rivet body 1 after installation is completed.

[0033] Please refer to Figure 1 , Figure 2 and Figure 3The threaded portion of the rivet body 1 is made of steel material, the limiting ring 7 is made of steel material, the threaded portion of the rivet body 1 and the limiting ring 7 connected with the threaded portion have higher strength and stability, can bear larger pressure and load, avoid deformation of the threaded portion of the rivet body 1 in the process of rivet fixing, cause the limiting ring 7 to slip, improve the stability of the limiting ring 7 and the stability of the rivet body 1 after installation, and the steel material also has good corrosion resistance, avoids easy corrosion of the threaded portion of the rivet body 1 and the limiting ring 7 in the process of use, and improves the durability of the rivet.

[0034] Please refer to Figure 2 and Figure 3 , the outer circumferential surface of the limiting ring 7 is provided with equidistantly arranged anti-skid grooves, the anti-skid grooves on the limiting ring 7 can increase the friction between the hands or external tools, facilitate the installation and disassembly of the limiting ring 7, provide convenience for the user, and improve the practicality of the rivet.

[0035] Please refer to Figure 1 , Figure 2 and Figure 3 , the outer circumferential surface of the locking ring 6 is provided with equidistantly arranged anti-skid grooves, the anti-skid grooves on the locking ring 6 can increase the friction between the hands or external tools, facilitate the installation and disassembly of the locking ring 6, provide convenience for the user, and improve the practicality of the rivet.

[0036] Please refer to Figure 1 , Figure 2 and Figure 3 , the bottom of the rivet body 1 is made of aluminum alloy material, the bottom of the rivet body 1 made of aluminum alloy material can reduce the weight of the rivet, avoid that the rivet has a great influence on the weight of the material after installation, can better deform to form a double-drum structure, facilitate the installation of the rivet, and the bottom of the rivet body 1 made of aluminum alloy material also has good corrosion resistance, avoids easy corrosion of the rivet in the process of use, and improves the durability of the rivet.

[0037] Please refer to Figure 1 , Figure 2 and Figure 3 , the bottom plate 4 is made of steel material, the barb 5 is arranged in a ring shape, the barb 5 is made of steel material, the bottom plate 4 and the barb 5 made of steel material have higher strength and stability, can bear larger pressure and load, avoid deformation of the bottom plate 4 and the barb 5 in the process of rivet fixing, improve the stability of the rivet body 1 after installation, and also avoid easy corrosion of the bottom plate 4 and the barb 5, improve the durability of the rivet, and the ring-shaped barb 5 can uniformly penetrate into the bottom of the material to promote uniform stress.

[0038] Please refer to Figure 1 , Figure 2 and Figure 4The barb 5 is parallel to the core rod 3, which enables the barb 5 to be vertically inserted into the bottom of the material, limits the rivet from being easily loosened, and improves the stability of the rivet and the material.

[0039] The double-drum type core-pulling rivet in the embodiment is provided with the conical flared portion 2, the bottom plate 4 and the barb 5, which enables the rivet to be pressed by the bottom plate 4 when the rivet is deformed, and the barb 5 to be inserted into the bottom of the material, improves the stability of the rivet and the material, avoids the rivet from being easily loosened, and is provided with the locking ring 6 which is threadedly connected with the core rod 3, and the abutting ring 8 which is arranged at the bottom of the locking ring 6, which enables the rivet and the material to be further pressed, improves the stability of the rivet, is provided with the limiting ring 7 which is threadedly connected with the rivet body 1, which enables the installation length of the rivet to be adjusted according to the length of the hole, and is adapted to the holes with different lengths, further improves the stability of the rivet after installation, and solves the problems that the existing single-drum rivet has obvious deficiencies in connection strength and durability, is easily loosened or even broken, and the single-drum type core-pulling rivet is connected in the connection of the multi-layer materials, and the thicknesses are inconsistent, which may cause the connection to be unreliable.

[0040] It should be noted that the length of the barb 5 is slightly greater than the width of the rivet body 1 after deformation, which enables only the top end of the barb 5 to be inserted into the material, avoids being inserted too deep, and causes damage to the material.

[0041] The working principle of the above embodiment is as follows:

[0042] When the rivet is installed, first, the locking ring 6 and the limiting ring 7 are removed, then the rivet body 1 is inserted from the inside of the hole to the outside, and the height of the limiting ring 7 is adjusted according to the length of the hole, so that the length of the double-drum deformation part at the bottom of the rivet body 1 remains consistent, thereby fixing holes of different lengths and improving the stability of the installed rivet. After the limiting ring 7 is installed, the core rod 3 is pulled out using an external tool, the core rod 3 drives the clasp ring 9, the bottom plate 4 and the barb 5 to move upwards, the clasp ring 9 can ensure the expansion of the rivet body 1 during the upward movement, expand the diameter of the bottom of the rivet body 1, and make the double-drum area larger during deformation, thereby increasing the friction area with the material bottom and improving the stability of the installed rivet body 1. The bottom plate 4 can extrude the conical flared portion 2 when it moves upwards, so that the bottom of the rivet body 1 is deformed into a double-drum structure, and the conical flared portion 2 is flattened. The conical flared portion 2 and the deformed double-drum structure are extruded, the bottom of the rivet body 1 is pressed against the bottom surface of the material, the barb 5 is inserted into the bottom surface of the material during the upward movement, the stability of the rivet and the material is improved, and the rivet is prevented from loosening easily. Finally, the locking ring 6 is screwed onto the core rod 3, and the locking ring 6 is tightened, the abutting ring 8 at the bottom of the locking ring 6 can abut against the upper surface of the material, and the core rod 3 and the bottom plate 4 are lifted during rotation, further tightening the rivet as a whole and improving the stability of the rivet.

[0043] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0044] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A double-drum type blind rivet comprising a rivet body (1), characterized in that: The bottom of the rivet body (1) is provided with a conical flared portion (2), the inside of the rivet body (1) is slidably connected with a core rod (3), the bottom surface of the core rod (3) is fixedly connected with a bottom plate (4), the upper surface of the bottom plate (4) is fixedly connected with equidistantly arranged barbs (5), the outer circumferential surface of the core rod (3) is threadedly connected with a locking ring (6), the bottom surface of the locking ring (6) is fixedly connected with an abutting ring (8), and the top end of the outer circumferential surface of the rivet body (1) is threadedly connected with a limiting ring (7).

2. A double-die type self-plunging rivet according to claim 1, characterized in that: The outer circumferential surface of the core rod (3) is fixedly sleeved with a clamping ring (9), and the outer wall diameter of the clamping ring (9) is greater than the inner wall diameter of the rivet body (1).

3. A double-die type self-plunging rivet according to claim 1, characterized in that: The threaded portion of the rivet body (1) is made of steel material, and the limiting ring (7) is also made of steel material.

4. A double-die type self-plunging rivet according to claim 1, wherein: The outer circumferential surface of the limiting ring (7) is provided with equidistantly arranged anti-skid grooves.

5. A double-die type self-plunging rivet according to claim 1, wherein: The outer circumferential surface of the locking ring (6) is provided with equidistantly arranged anti-skid grooves.

6. A double-die type self-plunging rivet according to claim 1, wherein: The bottom of the rivet body (1) is made of aluminum alloy material.

7. A double-die type self-plunging rivet according to claim 1, wherein: The bottom plate (4) is made of steel material, the barbs (5) are arranged in a ring shape, and the barbs (5) are made of steel material.

8. A double-die type self-plunging rivet according to claim 1, wherein: The barbs (5) are arranged in parallel with the core rod (3).

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