A fastening structure for anti-loosening bolts used in photovoltaic equipment installation

Abstract

This utility model discloses an anti-loosening bolt fastening structure for photovoltaic equipment installation, including a nut, a screw fixed to the bottom of the nut, a nut threaded onto the outer wall of the screw, an anti-loosening sleeve fitted onto the outer wall of the screw, a slot on the surface of the anti-loosening sleeve, the outer wall of the nut inserted into the inner wall of the slot, and a retaining ring fixed to the inner wall of the anti-loosening sleeve. This utility model relates to the technical field of photovoltaic equipment installation parts. This anti-loosening bolt fastening structure for photovoltaic equipment installation, through the cooperation of a limiting strip, limiting groove, slot, pin, rubber ring, and insertion hole, prevents the bolt from loosening as a whole. It solves the problem that long-term exposure to wind and vibration can cause stress attenuation between the two nuts, and continuous impact and friction between the threads, which not only accelerates thread wear but may also lead to thread deformation or even stripping, thus reducing the bolt's performance.

Description

Technical Field

[0001] This utility model relates to the technical field of photovoltaic equipment installation parts, specifically a fastening structure for anti-loosening bolts used in photovoltaic equipment installation. Background Technology

[0002] Photovoltaic equipment is a clean energy device that converts solar energy into electrical energy. It is mainly divided into three types: stand-alone, grid-connected, and hybrid. During the installation of photovoltaic equipment, bolts are commonly used connecting parts, and the firmness of their connection directly affects the stability and safety of the photovoltaic equipment.

[0003] Traditional bolts typically have two nuts attached to them. The friction generated by the relative preload of the two nuts helps prevent the bolt from loosening. However, photovoltaic equipment is usually installed outdoors and is subject to wind and vibration over a long period of time. Under long-term vibration, stress attenuation can easily occur between the two nuts, and continuous impact and friction can occur between the threads. This not only accelerates thread wear but may also cause thread deformation or even stripping, thus reducing the effectiveness of the bolt. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an anti-loosening bolt fastening structure for photovoltaic equipment installation. It solves the problem that under long-term wind influence and vibration, stress attenuation easily occurs between the two nuts, and continuous impact and friction occur between the thread teeth. This not only accelerates thread wear but may also lead to thread deformation or even stripping, thereby reducing the bolt's performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fastening structure for anti-loosening bolts used in photovoltaic equipment installation, comprising a nut, a screw fixedly connected to the bottom of the nut, a nut threadedly connected to the outer wall of the screw, an anti-loosening sleeve fitted onto the outer wall of the screw, a slot formed on the surface of the anti-loosening sleeve, the outer wall of the nut inserted into the inner wall of the slot, a retaining ring fixedly connected to the inner wall of the anti-loosening sleeve, the inner wall of the retaining ring fitting against the outer wall of the screw, an insertion hole formed on the outer wall of the nut, and a pin penetrating through the outer wall of the anti-loosening sleeve, the end of the pin inserted into the inner wall of the insertion hole.

[0006] Preferably, a rubber ring is fixed to the outer wall of the end of the pin, and the outer wall of the rubber ring is in contact with the inner wall of the insertion hole.

[0007] Preferably, a limiting groove is formed on the lower part of the outer wall of the screw, and a limiting strip is fixedly connected to the lower part of the inner wall of the anti-loosening sleeve, with the outer wall of the limiting strip inserted into the inner wall of the limiting groove.

[0008] Preferably, the outer wall of the anti-loosening sleeve is provided with anti-slip texture.

[0009] Preferably, the other end of the pin has a horizontal groove, and the side wall of the horizontal groove has a retaining groove.

[0010] Preferably, the bottom of the screw has a second chamfer, and the outer wall of the nut has a first chamfer.

[0011] Beneficial effects

[0012] This utility model provides an anti-loosening bolt fastening structure for photovoltaic equipment installation. It offers the following advantages: This anti-loosening bolt fastening structure for photovoltaic equipment installation, through the cooperation of an anti-loosening sleeve, retaining ring, limiting strip, limiting groove, slot, pin, rubber ring, and insertion hole, prevents the bolt from loosening as a whole. It also solves the problem of stress attenuation between the two nuts due to long-term wind vibration, and continuous impact and friction between the thread teeth under long-term vibration conditions. This not only accelerates thread wear but may also lead to thread deformation or even stripping, thus reducing the bolt's performance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 Exploded view;

[0015] Figure 3 for Figure 2 A structural diagram of the anti-loosening sleeve, slot, and pin;

[0016] Figure 4 for Figure 3 A structural diagram of the clasp, limiting strip, and anti-loosening sleeve;

[0017] Figure 5 for Figure 4 A schematic diagram of the structure of the central pin and the transverse groove.

[0018] In the diagram: 1. Nut; 2. Screw; 3. Nut; 4. First chamfer; 5. Second chamfer; 6. Anti-loosening sleeve; 7. Anti-slip texture; 8. Limiting groove; 9. Snap ring; 10. Limiting strip; 11. Slot; 12. Pin; 13. Rubber ring; 14. Horizontal groove; 15. Snap groove; 16. Insertion hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Long-term exposure to wind causes vibration. Under long-term vibration conditions, stress attenuation can easily occur between the two nuts, and continuous impact and friction between the threads can not only accelerate thread wear, but also cause thread deformation or even stripping, thereby reducing the effectiveness of the bolt.

[0021] In view of this, the present invention provides a fastening structure for anti-loosening bolts used in photovoltaic equipment installation. Through the cooperation between the anti-loosening sleeve, retaining ring, limiting strip, limiting groove, slot, pin, rubber ring and insertion hole, the bolt as a whole is prevented from loosening. This solves the problem of long-term wind force causing vibration. Under long-term vibration conditions, stress attenuation easily occurs between the two nuts, and continuous impact and friction occur between the threads. This not only accelerates the wear of the threads, but may also cause thread deformation or even stripping, thereby reducing the performance of the bolt.

[0022] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly introduced below.

[0023] Example 1, by Figure 1-5 As can be seen, the anti-loosening bolt fastening structure for photovoltaic equipment installation in this case includes a nut 1, a screw 2 fixedly connected to the bottom of the nut 1, a nut 3 threadedly connected to the outer wall of the screw 2, an anti-loosening sleeve 6 sleeved on the outer wall of the screw 2, a slot 11 opened on the surface of the anti-loosening sleeve 6, the outer wall of the nut 3 inserted into the inner wall of the slot 11, a retaining ring 9 fixedly connected to the inner wall of the anti-loosening sleeve 6, the inner wall of the retaining ring 9 fitting against the outer wall of the screw 2, an insertion hole 16 opened on the outer wall of the nut 3, and a pin 12 penetrating through the outer wall of the anti-loosening sleeve 6, the end of the pin 12 inserted into the inner wall of the insertion hole 16;

[0024] In the specific implementation process, it is worth noting that the nut 1, screw 2 and nut 3 are usually made of metal, such as carbon steel (commonly high-strength carbon steel such as grade 8.8 and grade 10.9) or stainless steel (304 and 316 stainless steel, suitable for photovoltaic outdoor environments with high corrosion resistance requirements). The nut 1 and screw 2 are integrally formed structures, providing basic fastening connection functions. The nut 3 is connected to the screw 2 through threads to achieve pre-tightening of the photovoltaic equipment. The anti-loosening sleeve 6 is made of metal (such as aluminum alloy, carbon steel with galvanized surface, etc.), which has a certain strength and toughness. The retaining ring 9 has a certain elasticity and is made of EPDM rubber. The retaining ring 9 and the anti-loosening sleeve 6 are connected by vulcanized adhesive.

[0025] During the installation of photovoltaic equipment, the workers first insert the screw 2 into the pre-drilled through hole in the mounting bracket and equipment. After that, the nut 3 is rotated onto the screw 2 to fix it in place. Then, the anti-loosening sleeve 6 is put on the screw 2. The anti-loosening sleeve 6 moves the slot 11 and inserts the slot 11 into the nut 3. At the same time, the anti-loosening sleeve 6 moves the retaining ring 9. When the retaining ring 9 moves, it is squeezed by the screw 2 and undergoes elastic deformation, thus pressing against the screw 2. After that, the workers move the pin 12 and insert the pin 12 into the socket 16 to prevent the bolt from loosening.

[0026] Furthermore, a rubber ring 13 is fixed to the outer wall of the end of the pin 12, and the outer wall of the rubber ring 13 is attached to the inner wall of the socket 16.

[0027] In the specific implementation process, it is worth noting that the rubber ring 13 is made of rubber (such as nitrile rubber). When the pin 12 moves, the pin 12 drives the rubber ring 13 to move and insert it into the socket 16. The rubber ring 13 uses the elasticity and sealing properties of rubber to fill the gap between the pin 12 and the socket 16, enhance the stability of the pin 12 connection, and at the same time have a certain buffering and anti-loosening effect.

[0028] Furthermore, a limiting groove 8 is provided on the lower outer wall of the screw 2, and a limiting strip 10 is fixedly connected to the lower inner wall of the anti-loosening sleeve 6. The outer wall of the limiting strip 10 is inserted into the inner wall of the limiting groove 8.

[0029] In the specific implementation process, it is worth noting that when the worker puts the anti-loosening sleeve 6 on the screw 2, the worker aligns the limiting strip 10 on the anti-loosening sleeve 6 with the limiting groove 8. After that, the worker moves the anti-loosening sleeve 6, and the anti-loosening sleeve 6 drives the limiting strip 10 to insert into the limiting groove 8 and move along the limiting groove 8. The two work together to achieve axial limiting of the anti-loosening sleeve 6 on the screw 2, preventing the anti-loosening sleeve 6 from moving axially along the screw 2.

[0030] When the photovoltaic equipment is affected by wind vibration outdoors, the nut 3 tends to loosen or rotate with the screw 2 thread. However, since the outer wall of the nut 3 is inserted into the slot 11 of the anti-loosening sleeve 6, and the pin 12 locks the relative rotation of the two, and the anti-loosening sleeve 6 is axially limited by the limiting strip 10 and the limiting groove 8 of the screw 2, the anti-loosening sleeve 6 itself cannot rotate or move freely, thereby restricting the rotation of the nut 3 and preventing it from loosening.

[0031] If an external force attempts to rotate the nut 3, the side wall of the slot 11 and the pin 12 will bear the rotational torque of the nut 3, distributing the torque to the limiting structure of the anti-loosening sleeve 6 and the screw 2. By utilizing the structural strength and fit of each component, the loosening tendency is counteracted, and long-term anti-loosening is achieved.

[0032] Furthermore, the outer wall of the anti-loosening sleeve 6 is provided with anti-slip texture 7;

[0033] In the specific implementation process, it is worth noting that the anti-slip texture 7 increases the friction coefficient of the outer wall of the anti-loosening sleeve 6. When using tools (such as wrenches or pliers) to install or remove the anti-loosening sleeve 6, the tools can hold the anti-loosening sleeve 6 more firmly, making it easier to apply force. At the same time, during the manual installation and debugging stage, the operator can also use the anti-slip texture 7 to more easily rotate or move the anti-loosening sleeve 6, improving the convenience and efficiency of installation.

[0034] Furthermore, a transverse groove 14 is provided at the other end of the pin 12, and a slot 15 is provided on the side wall of the transverse groove 14.

[0035] In the specific implementation process, it is worth noting that the external tool is shaped like a concave handle, and the end of the concave handle is fixed with a locking block that matches the shape of the locking slot 15. The concave handle and the locking block are made of elastic plastic material, which is thermoplastic polyurethane elastomer. The concave handle and the locking block are integrally molded.

[0036] When disassembling the pin 12, the worker presses the concave handle to deform it, then inserts it into the transverse groove 14. At the same time, the concave handle moves the locking block. After inserting the concave handle into the transverse groove 14, the worker stops pressing the concave handle and allows it to spring back, thus inserting the locking block into the locking slot 15. After that, the worker pulls the concave handle to disengage the pin 12 from the insertion hole 16. Finally, the concave handle is removed from the transverse groove 14, making it convenient for the worker to move and disassemble the pin 12.

[0037] Example 2, by Figure 1 and 2 It can be seen that the bottom of the screw 2 is provided with a second chamfer 5, and the outer wall of the nut 3 is provided with a first chamfer 4;

[0038] In the specific implementation process, it is worth noting that when the nut 3 is screwed into the screw 2, the first chamfer 4 can guide the nut 3 to smoothly align with the thread of the screw 2, avoiding damage to the starting end of the thread. The second chamfer 5 at the bottom of the screw 2 can allow the screw 3 to pass through the through hole on the mounting bracket and photovoltaic equipment more smoothly, reducing installation resistance and protecting the end of the screw 2 and the surface of the mounting bracket and photovoltaic equipment from damage.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anti-loosening bolt fastening structure for photovoltaic device installation, comprising a nut (1), characterized by: The bottom of the nut (1) is fixedly connected to a screw (2), the outer wall of the screw (2) is threaded with a nut (3), the outer wall of the screw (2) is fitted with an anti-loosening sleeve (6), the surface of the anti-loosening sleeve (6) is provided with a slot (11), the outer wall of the nut (3) is inserted into the inner wall of the slot (11), the inner wall of the anti-loosening sleeve (6) is fixedly connected with a retaining ring (9), the inner wall of the retaining ring (9) is attached to the outer wall of the screw (2), the outer wall of the nut (3) is provided with an insertion hole (16), the outer wall of the anti-loosening sleeve (6) is penetrated by a pin (12), the end of the pin (12) is inserted into the inner wall of the insertion hole (16).

2. The loosening-preventing bolt fastening structure for photovoltaic equipment installation according to claim 1, characterized in that: A rubber ring (13) is fixed to the outer wall of the end of the pin (12), and the outer wall of the rubber ring (13) is attached to the inner wall of the socket (16).

3. The loosening-preventing bolt fastening structure for photovoltaic equipment installation according to claim 1, characterized in that: A limiting groove (8) is provided on the lower part of the outer wall of the screw (2), and a limiting strip (10) is fixedly connected to the lower part of the inner wall of the anti-loosening sleeve (6). The outer wall of the limiting strip (10) is inserted into the inner wall of the limiting groove (8).

4. The loosening-preventing bolt fastening structure for photovoltaic equipment installation according to claim 1, characterized in that: The outer wall of the anti-loosening sleeve (6) is provided with anti-slip texture (7).

5. The anti-loosening bolt fastening structure for photovoltaic equipment installation according to claim 1, characterized in that: The other end of the pin (12) is provided with a horizontal groove (14), and the side wall of the horizontal groove (14) is provided with a slot (15).

6. The loosening-preventing bolt fastening structure for photovoltaic equipment installation according to claim 1, characterized in that: The bottom of the screw (2) is provided with a second chamfer (5), and the outer wall of the nut (3) is provided with a first chamfer (4).

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