Bolt and nut riveting fixing structure

Abstract

A bolt and nut riveting and fixing structure is used for connection between two overlapped connecting plates, connecting holes allowing a bolt to penetrate through are correspondingly formed in the two connecting plates, the bolt comprises a threaded rod and a bolt head, and threads are arranged on the threaded rod; the nut comprises a penetrating opening which is formed in the middle of a cylindrical nut body and allows a screw rod part to penetrate, the top face of the nut body is provided with an annular flange in an outward protruding mode, a notch is formed in the bottom of the inner side wall of the nut body, and a positioning protrusion which can be clamped into threads of the bolt is arranged in the notch in a protruding mode. The screw rod of the bolt penetrates through the connecting hole between the two connecting plates, the nut is screwed on the thread of the screw rod until the flange of the nut abuts against the bottom face of the connecting plate, the positioning protrusion of the nut is along the thread and achieves pre-locking, the nut is squeezed and deformed on the outer side of the screw rod through a riveter to complete fastening, and the two connecting plates are riveted together. The riveting device is simple in structure, can be quickly fixed and disassembled by utilizing a riveter, effectively improves the assembly efficiency, and reduces the labor cost.

Description

Technical Field

[0001] The utility model relates to the field of metal parts, and more particularly to a bolt and nut riveting fixing structure. Background Art

[0002] With the development of new energy sources and growing environmental awareness, solar photovoltaic systems have become widely used. Currently, existing technologies use steel purlins to securely connect photovoltaic modules and photovoltaic mounts. Bolts (or pressure blocks combined with bolts) secure the modules to the purlins. This fastening method typically utilizes a two-flat, one-spring hexagonal bolt assembly. However, this assembly requires numerous parts, resulting in lengthy installation times, low efficiency, and difficulty in disassembly, which increases the workload for workers. Therefore, a fast-installation bolt solution is urgently needed to address these photovoltaic installation challenges, leading to this proposal. Utility Model Content

[0003] The purpose of the utility model is to provide a bolt and nut riveting fixing structure, which has a simple structure and can be quickly fixed and disassembled using a rivet gun, effectively improving assembly efficiency and reducing labor costs.

[0004] In order to achieve the above objectives, the solution of the present invention is:

[0005] A bolt and nut riveting fixing structure is used for connecting two overlapping connecting plates, and corresponding connecting holes for the bolt to pass through are provided in the two connecting plates. The bolt includes a screw rod and a bolt head, and the screw rod is provided with a thread; the nut includes a through-hole formed in the middle of a cylindrical nut body for the screw rod to pass through, and the top surface of the nut body is provided with a ring-shaped flange protruding outward, and a notch is formed in the bottom of the inner wall of the nut body, and a positioning protrusion that can be inserted into the thread of the bolt is protruded in the notch; the screw rod of the bolt passes through the connecting hole between the two connecting plates, and the nut is screwed onto the thread of the screw rod until the flange of the nut hits the bottom surface of the connecting plate, and the positioning protrusion of the nut follows the thread and realizes pre-locking. The nut is squeezed and deformed on the outside of the screw rod by a rivet gun to complete the tightening, and the two connecting plates are riveted together.

[0006] Furthermore, the tail end of the screw rod forms a clamping portion that can be clamped and pulled back by a chuck in a rivet gun. When the bolt is pulled back, the nut is reversely squeezed to a predetermined position by the rivet gun to be deformed.

[0007] Furthermore, the engaging portion is formed into a neck portion by being concave inwardly along the circumferential direction at the middle of the tail end of the screw, and the outer end of the neck portion forms a cylindrical guide head, and the diameter of the guide head is smaller than the diameter of the screw.

[0008] Furthermore, the nut body forms an annular circumferential side wall, the top surface of the circumferential side wall is provided with an annular flange protruding outward, the inner wall surface of the circumferential side wall is not provided with threads, the inner edge of the bottom surface of the circumferential side wall extends inward to form a notch concave in the inner wall surface of the circumferential side wall, and the top of the notch protrudes into the through opening to form a square block-shaped positioning protrusion.

[0009] Furthermore, the screw rod protrudes from the bottom surface of the bolt head, the nut opening penetrates into the screw rod, the flange of the nut is located parallel to the bottom of the bolt head, and an anti-slip protrusion is also protruded from the bottom surface of the bolt head.

[0010] Furthermore, the anti-slip protrusions are convex patterns, convex particles or convex blocks.

[0011] Furthermore, the bolts and nuts are made of aluminum or stainless steel.

[0012] Furthermore, among the two connecting plates, the upper connecting plate is the pole of the photovoltaic bracket, and the lower connecting plate is the side connecting plate in the purlin.

[0013] After adopting the above structure, the utility model ensures its fastening strength through a simple bolt-nut matching structure and a transition fit or interference fit fixed by riveting. During assembly, it is only necessary to screw the nut onto the bolt for pre-tightening, and then use a rivet gun to quickly fix it. The assembly is simple and fast, and disassembly can be completed simply and quickly using common power tools, which effectively improves assembly efficiency and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of connecting photovoltaic modules and steel purlins of the present invention;

[0015] Figure 2 for Figure 1 Schematic cross-sectional view;

[0016] Figure 3 It is a structural diagram of the bolt in the utility model;

[0017] Figure 4 It is a structural diagram of the nut in the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the bolt and nut after assembly of the utility model;

[0019] Figure 6 for Figure 5 A cross-sectional schematic diagram;

[0020] Figure 7 This is a schematic diagram of the riveting principle of the present invention. DETAILED DESCRIPTION

[0021] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0022] like Figure 1 、 Figure 2 As shown, the utility model discloses a bolt and nut riveted fixing structure, which can be used for the connection between two overlapping connecting plates or connecting parts. In this embodiment, the upper connecting plate is the frame rod 11 of the photovoltaic bracket, and the lower connecting plate is the side connecting strip 12 in the purlin. At the same time, in the two connecting plates, namely the frame rod 11 and the side connecting strip 12, corresponding connection holes for the screw rod of the bolt to pass through are provided.

[0023] Combine Figures 2 to 6 As shown, in the present invention, the bolt 2 includes a screw rod 21 and a bolt head 22, and a thread 211 is provided on the screw rod 21; the nut 3 includes a cylindrical nut body 31 and a flange 32 with a ring protruding outward on the top surface of the nut body 31, and a through-hole 311 for the screw rod to pass through is formed in the middle of the nut body 31. The material of the bolt 2 and the nut 3 can be metal such as aluminum or stainless steel. Further, a notch 312 is formed in the bottom of the inner wall of the nut body 31, and a positioning protrusion 313 that can be inserted into the thread 211 of the bolt is protruded in the notch 312. During assembly, the screw rod 21 of the bolt 2 passes through the connecting hole between the two connecting plates (such as Figure 2 As shown), the nut 3 is screwed onto the thread 211 of the screw rod 21 until the flange 32 of the nut presses against the bottom surface of the connecting plate (i.e., the side connecting plate 12) located below. The positioning protrusion 313 of the nut 3 can follow the thread 211 and achieve pre-tightening. Then, the nut 3 can be tightened after being squeezed and deformed on the outside of the screw rod 21 by a rivet gun, and the bolt is tightened to rivet the two connecting plates together, achieving a transition fit or interference fit fixed by riveting to ensure its fastening strength. The fixation of the photovoltaic module and the purlin can be quickly fastened and disassembled by bolt and nut riveting.

[0024] Specific, combined Figure 3 、 Figure 5 as well as Figure 7As shown, a clamping portion can be formed at the tail end of the screw 21, which can be clamped and pulled back by a chuck (open chuck 41) in the rivet gun 4. When the bolt 2 is pulled back, the nut 3 can be reversely extruded by the rivet gun to a predetermined position (i.e., the set stroke of the rivet gun's forward extrusion), causing deformation. In this embodiment, the clamping portion is formed by a constricted portion 212 formed circumferentially inwardly at the middle of the tail end of the screw 21. The outer end of the constricted portion 212 forms a cylindrical guide head 213, and the diameter of the guide head 213 is smaller than that of the screw 21. The cooperation between the constricted portion 212 and the guide head 213 allows the open chuck portion of the rivet gun 4 to clamp the constricted portion 212 of the screw 21, thereby pulling the screw 21 outward. At the same time, the cylindrical guide head 213 can more easily pass through the connection hole between the two connecting plates, serving as a guide, making bolt installation faster and more convenient, saving time and effort.

[0025] like Figure 4 、 Figure 6 as well as Figure 7 As shown, the nut body 31 forms an annular peripheral sidewall, the top surface of which is provided with an annular flange 32 protruding outwardly. The inner wall surface of the peripheral sidewall is not provided with threads. The inner edge of the bottom surface of the peripheral sidewall extends inwardly to form a notch 312 recessed in the inner wall surface of the peripheral sidewall. The top of the notch 312 protrudes into the through-hole 311 to form a square block-shaped positioning protrusion 313. Although the nut 3 does not have threads to form a threaded connection with the screw 21, the notch 312 and the positioning protrusion 313 on the nut body 31 can serve as a limiter, making it easier to pre-assemble the screw 21. The positioning protrusion 313 can follow the screw thread 211 to complete the pre-locking step, achieving a good anti-loosening and tightening effect. Therefore, the threaded section 211 of the screw 21 can provide an anti-loosening pre-locking function for the nut 3, which is conducive to the nut 3 being pressed against the connected component (connecting plate) under the action of a tool, and the nut 3 can shrink and wrap around the screw 21.

[0026] Furthermore, in the bolt 2, the screw rod 21 protrudes from the bottom surface of the bolt head 22, and the screw rod 21 protrudes from the bottom surface of the bolt head 22. Figure 3 、 Figure 5 、 Figure 6 As shown, the opening 311 of the nut 3 penetrates the screw 21, and the flange 32 of the nut 3 is located parallel to the bottom of the bolt head 22. The bottom surface of the bolt head 22 is also provided with anti-slip protrusions 221. The anti-slip protrusions 221 can be anti-slip structures such as ridges, ridges, or bumps. In this embodiment, the anti-slip protrusions 221 are arranged in a ring-like structure with multiple protrusions spaced apart and arranged on the bottom surface of the bolt head 22. When the bolt head 22 is assembled, it is fixed to the upper surface of the connecting plate. The anti-slip protrusions 221 can be embedded in the connecting plate surface and firmly locked at the assembly point, providing excellent anti-loosening, anti-slip, and anti-rotation functions, and a long service life.

[0027] Combine Figure 7 , further explaining the principle of riveting fixation of the utility model:

[0028] 1. First, insert the bolt 2 through the material to be connected (such as the frame rod 11 and the side connecting strip 12). Screw the nut 3 onto the thread 211 of the screw 21 in the bolt 2. The notch 312 and the positioning protrusion 313 are designed to prevent it from loosening and rotating on the thread 211. Tighten the nut to pre-tighten it.

[0029] 2. Place the rivet gun (power tool) with the open collet 41 completely over the end of the bolt 2. When the rivet gun is activated, the front open collet 41 closes and pulls the bolt 2, closing any gaps in the joint and squeezing the nut 3 to the position set by the rivet gun (i.e., the set forward stroke of the rivet gun). The nut then deforms and tightens.

[0030] 3. Once the rivet gun (power tool) stroke limit is reached, the tool stroke stops and returns to release bolt 2, and tightening is completed.

[0031] When it is necessary to release the fixation and remove the bolt and nut, a separate rivet gun can be used to break the fixed and deformed nut 3 to achieve disassembly. Specifically, the hydraulic principle is used to drive the cutter head (not shown) of a dedicated electric disassembly tool (rivet gun). The cutter head in the electric disassembly tool (inside) pushes forward against the peripheral side wall of the nut body 31 (the cutter head pushes forward from the bottom of the peripheral side wall). Using the shearing collar, the peripheral side wall of the nut body is sheared (crushed), and the nut is sheared and destroyed, allowing the nut to be removed and the bolt and nut to fall off, thus allowing for simple and quick disassembly using common electric tools.

[0032] The above embodiments and drawings do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A bolt-nut riveted fixing structure for connecting two superimposed connecting plates, wherein the two connecting plates are provided with corresponding connecting holes for the bolts to pass through, characterized in that: The bolt includes a screw rod and a bolt head, and the screw rod is provided with a thread; the nut includes a through-hole formed in the middle of the cylindrical nut body for the screw rod to pass through, the top surface of the nut body is provided with a ring-shaped flange protruding outward, and a notch is formed in the bottom of the inner wall of the nut body, and a positioning protrusion is provided in the notch that can be inserted into the thread of the bolt; the screw rod of the bolt passes through the connecting hole between the two connecting plates, and the nut is screwed onto the thread of the screw rod until the flange of the nut hits the bottom surface of the connecting plate, and the positioning protrusion of the nut follows the thread and realizes pre-locking. The nut is squeezed and deformed on the outside of the screw rod by a rivet gun to complete the tightening, and the two connecting plates are riveted together.

2. The bolt and nut riveting fixing structure according to claim 1, characterized in that: The tail end of the screw rod forms a clamping portion that can be clamped and pulled back by a chuck in a rivet gun. When the bolt is pulled back, the nut is reversely squeezed by the rivet gun to a predetermined position to be deformed.

3. The bolt and nut riveting fixing structure according to claim 2, characterized in that: The clamping portion is formed into a neck portion by being concave inwardly along the circumferential direction at the middle of the tail end of the screw, and the outer end of the neck portion forms a cylindrical guide head, and the diameter of the guide head is smaller than the diameter of the screw.

4. The bolt and nut riveting fixing structure according to claim 1, characterized in that: The nut body forms an annular circumferential side wall, the top surface of the circumferential side wall is provided with an annular flange protruding outward, the inner wall surface of the circumferential side wall is not provided with threads, the inner edge of the bottom surface of the circumferential side wall extends inward to form a notch concave in the inner wall surface of the circumferential side wall, and the top of the notch protrudes into the through opening to form a square block-shaped positioning protrusion.

5. The bolt and nut riveted fixing structure according to claim 1, characterized in that: The screw rod protrudes from the bottom surface of the bolt head, the nut opening penetrates into the screw rod, the flange of the nut is parallel to the bottom of the bolt head, and an anti-slip protrusion is convexly provided on the bottom surface of the bolt head.

6. The bolt and nut riveting fixing structure according to claim 5, characterized in that: The anti-slip protrusions are convex patterns, convex grains or bumps.

7. The bolt and nut riveted fixing structure according to claim 1, characterized in that: Bolts and nuts are made of aluminum or stainless steel.

8. The bolt and nut riveted fixing structure according to claim 1, characterized in that: Of the two connecting plates, the upper connecting plate is the pole of the photovoltaic bracket, and the lower connecting plate is the side connecting plate in the purlin.

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