Anti-drop fastener

Abstract

The utility model provides a kind of anti-falling fastener, belong to fastener technical field, including bolt and nut, nut is sleeved on bolt, and is connected with bolt thread, it is provided with the fastening assembly for fixed between bolt and nut, it is provided with flat washer between fastening assembly and nut, flat washer is sleeved on bolt, fastening assembly includes first sleeve and second sleeve, first sleeve and second sleeve are all sleeved on bolt, first sleeve and second sleeve one end respectively integrally have multiple first flaps and multiple second flaps, the utility model is provided with fastening assembly, so that user can be after nut is tightened, by the relative rotation extrusion of first flap and second flap and rise, form preliminary mechanical lock, improve the basic anti-loose ability of the device, so that user that adds under vibration environment Thread microslip, improve the anti-falling stability and connection reliability of the device.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and more specifically, it relates to a fastener that prevents detachment. Background Technology

[0002] Fasteners, as the core basic components of mechanical connections, are widely used in the assembly and fixing of various equipment and structures. Their connection stability is directly related to the operational safety and service life of the equipment. In industrial production, in order to ensure the relative position of the parts is fixed and to reduce displacement or separation caused by external forces such as vibration and impact, it is necessary to use anti-loosening fasteners, thereby effectively ensuring the overall performance and operational reliability of the equipment.

[0003] However, traditional fasteners in conventional devices rely on the thread friction of bolts and nuts for locking. In long-term use, micro-slippage can easily occur between the threads, causing the friction to gradually decrease, leading to loosening or even detachment. On the other hand, in harsh environments such as humid and dusty conditions, fasteners need to have good sealing performance to prevent moisture and dust from entering the thread gaps and causing corrosion and jamming, which would affect subsequent disassembly and connection strength. However, the sealing structure of traditional devices is usually relatively simple, often using ordinary flat washers, which have poor fit with bolts and nuts, making them prone to the intrusion of external impurities, reducing the environmental adaptability and service life of traditional devices. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a fastener designed to prevent slippage, thereby resolving the issues in the prior art where traditional devices rely heavily on friction for locking, leading to slippage, and where simple sealing using ordinary flat washers results in poor sealing performance.

[0005] The purpose and effect of this utility model's anti-loosening fastener are achieved by the following specific technical means:

[0006] A fastener designed to prevent detachment includes a bolt and a nut. The nut is fitted onto the bolt and threadedly connected to it. A fastening assembly for fixing is provided between the bolt and the nut. A flat washer is provided between the fastening assembly and the nut. The flat washer is fitted onto the bolt. The fastening assembly includes a first retaining sleeve and a second retaining sleeve. Both the first retaining sleeve and the second retaining sleeve are fitted onto the bolt. One end of each of the first retaining sleeve and the second retaining sleeve is integrally formed with multiple sets of first flaps and multiple sets of second flaps.

[0007] Ideally, multiple sets of first pry bars and multiple sets of second pry bars are rotatably connected, and each set of first pry bars and multiple sets of second pry bars is provided with a crease groove.

[0008] Ideally, one end of the first sleeve is integrally formed with multiple sets of limiting strips, the multiple sets of limiting strips are respectively located between multiple sets of the first pry bar, and guide grooves are opened between the multiple sets of limiting strips.

[0009] Ideally, one end of the second rocker piece is provided with multiple sets of insert rods, one end of each set of insert rods is inclined, and each set of insert rods corresponds to one of the multiple sets of guide grooves.

[0010] Ideally, the flat washer is located between the first ferrule and the nut. One end of the flat washer is integrally formed with multiple sets of first sealing rings, and the other end is fitted with a gasket. The gasket is sleeved on the bolt and is made of rubber.

[0011] Ideally, one end of the first ferrule is integrally formed with a force-bearing head, and one end of the force-bearing head is integrally formed with a second sealing cut ring. The force-bearing head is connected to the first ferrule through multiple sets of reinforcing ribs.

[0012] Ideally, one end of the bolt is integrally formed with a punch head, and multiple sets of balls are provided between the punch head and the second ferrule. One end of each set of balls is located inside the punch head, and the other end contacts the second ferrule.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model, through the coordinated arrangement of the first sleeve, the second sleeve, the first pry bar, the second pry bar, the insert rod, and the limiting strip, combined with the guiding effect of the crease groove, allows the user to achieve initial mechanical locking by the relative rotation and squeezing of the first and second pry bars after the nut is tightened, thus improving the basic anti-loosening capability of the device. After the initial locking, the user can achieve secondary limiting and fixing by inserting the insert rod along the guide groove, further restricting the relative rotation of the bolt and nut. This eliminates the user's concern about slight slippage of the threads under vibration, improving the anti-loosening stability and connection reliability of the device.

[0015] 2. When using this device, the user can achieve the first sealing protection by fitting the first sealing cut ring of the flat washer with the rubber gasket, which can reduce the intrusion of moisture and dust and improve the basic sealing performance of the device. Then, the second sealing cut ring of the force-bearing head further enhances the sealing effect, effectively reducing thread corrosion and jamming, reducing subsequent maintenance costs and disassembly difficulty for the user, and improving the environmental adaptability and service life of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembled structure of this utility model;

[0017] Figure 2This is a schematic diagram of the disassembled structure of this utility model;

[0018] Figure 3 This is a top view of the structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the first card sleeve structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the second ferrule structure of this utility model.

[0021] In the diagram, the correspondence between component names and their corresponding reference numerals is as follows:

[0022] 11. Bolt; 12. Nut; 13. Flat washer; 14. Breakout head; 21. First ferrule; 22. Second ferrule; 23. First pry bar; 24. Second pry bar; 25. Limiting strip; 26. Insert rod; 31. First sealing cut ring; 32. Force-bearing head; 33. Second sealing cut ring. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0024] Example:

[0025] like Figures 1 to 2 As shown, this utility model provides a fastener to prevent detachment, including a bolt 11 and a nut 12. The nut 12 is fitted onto the bolt 11 and threadedly connected to it. Through the threaded engagement of the bolt 11 and the nut 12, the locking force between the threads can achieve initial fixation of the parts to be connected, allowing users to quickly assemble the connection structure between components and improving the basic assembly efficiency of the device. A flat washer 13 is also fitted onto the bolt 11. One end of the flat washer 13 is integrally formed with multiple sets of first sealing rings 31. The first sealing rings 31 are annular protrusions that can fit against the end face of the parts to be connected when compressed, forming a sealing contact. The other end is fitted with a gasket, which is fitted onto the bolt 11. The gaskets are made of rubber, which has good elasticity and sealing properties and can fill the gap between the flat washer 13 and the nut 12. Users can achieve initial sealing protection through the cooperation of the first sealing rings 31 and the rubber gaskets, reducing the intrusion of water vapor and dust and improving the basic sealing performance of the device.

[0026] like Figures 2 to 4A fastening assembly for fixing is provided between the bolt 11 and the nut 12 shown. The fastening assembly includes a first retainer 21 and a second retainer 22. Both the first retainer 21 and the second retainer 22 are fitted onto the bolt 11 to adapt to the deformation requirements during assembly. One end of the first retainer 21 and the second retainer 22 is integrally formed with multiple sets of first pry bars 23 and multiple sets of second pry bars 24. The integrated arrangement of the first retainer 21, the second retainer 22 and the pry bars provides a structural basis for anti-loosening locking, so that the user can form a mechanical lock during the subsequent tightening process, thereby improving the anti-loosening reliability of the device.

[0027] One end of the bolt 11 is integrally formed with a breakthrough head 14. The breakthrough head 14 can guide the bolt 11 to pass smoothly through the through hole of the part to be connected, reducing alignment obstacles during assembly. Multiple sets of balls are provided between the breakthrough head 14 and the second retaining sleeve 22. One end of the multiple sets of balls is set inside the breakthrough head 14, and the other end contacts the second retaining sleeve 22. Through the rolling characteristics of the balls, the sliding friction between the breakthrough head 14 and the second retaining sleeve 22 when the bolt 11 is screwed in can be converted into rolling friction, making it easier for the user to turn the bolt 11, avoiding jamming, and improving the assembly convenience of the device.

[0028] Multiple sets of first pry bars 23 and multiple sets of second pry bars 24 are rotatably connected to ensure smooth rotation and prevent breakage. Each set of first pry bars 23 and multiple sets of second pry bars 24 is provided with a crease groove, which can guide the pry bars to deform precisely in a fixed direction and avoid deformation deviation or breakage. One end of the first sleeve 21 is integrally formed with multiple sets of limiting strips 25, which are located between the multiple sets of first pry bars 23. These limiting strips 25 can limit the excessive deformation of the first pry bars 23. The user can ensure that the pry bars deform stably when locked by the cooperation of the crease grooves and the limiting strips 25, thus avoiding damage and improving the durability of the anti-loosening structure of the device.

[0029] Guide grooves are provided between multiple sets of limiting strips 25. The guide grooves are inclined through structures with smooth inner walls and no burrs, which can provide a guiding path for the insertion rods 26. Multiple sets of insertion rods 26 are provided at one end of the second pry bar 24. The ends of the multiple sets of insertion rods 26 are all inclined and correspond to the multiple sets of guide grooves one by one. The user can insert the insertion rods 26 along the inclined guide grooves to form a secondary limit after the pry bar is deformed, further locking the relative rotation of the first retaining sleeve 21 and the second retaining sleeve 22. This allows the device to resist the micro-slippage of the threads under vibration environment and improves the anti-dropping stability of the device.

[0030] The first ferrule 21 has an integrally formed force-bearing head 32 at one end. The force-bearing head 32 can evenly bear the pressure transmitted by the flat washer 13, avoiding damage caused by excessive local stress on the first ferrule 21. The force-bearing head 32 also has an integrally formed second sealing cut ring 33 at one end. The second sealing cut ring 33 can fit against the surface of the connected parts to form a seal. The force-bearing head 32 is connected to the first ferrule 21 through multiple sets of reinforcing ribs. The reinforcing ribs are triangular support structures, which can improve the connection strength between the force-bearing head 32 and the first ferrule 21. The setting of the reinforcing ribs and the second sealing cut ring 33 not only enhances the structural stability but also strengthens the sealing effect, enabling the device to maintain good sealing and structural performance for a long time and improving its service life.

[0031] The specific usage and function of this embodiment are as follows:

[0032] When using this device for installation, the user first places the first retaining sleeve 21 and the second retaining sleeve 22 onto the bolt 11. Then, the user places the bolt 11, which is pre-fitted with the first retaining sleeve 21 and the second retaining sleeve 22, into the opening of the part to be connected. This reduces the complexity of step-by-step operations, making the assembly process simpler and avoiding positional shifts caused by separate installation of the retaining sleeves. This improves the accuracy of the assembly and enhances the user's operational fluency. Next, the part to be connected is placed on the device, and the bolt 11 is guided through the opening of the part to be connected. Then, the flat washer 13 is placed on the bolt 11, ensuring that the first sealing cut ring 31 at one end of the flat washer 13 faces the part to be connected, and the rubber gasket at the other end is in contact with the flat washer 13. Then, the nut 12 is screwed into the threaded end of the bolt 11. After being compressed, the first sealing cut ring 31 on the flat washer 13 is in contact with the end face of the part to be connected. The rubber gasket fills the gap between the flat washer 13 and the nut 12, forming the first seal and reducing the intrusion of moisture and dust.

[0033] The second sealing ring 33 on the force-bearing head 32 fits against the end face of the connected part, forming a second seal, further reducing residual impurities and extending the service life of the device. Finally, the nut 12 is tightened with a tool. During the tightening process, the locking force of the nut 12 drives the bolt 11 to move in the direction of the nut 12. The breakthrough head 14 at one end of the bolt 11 simultaneously pushes the second ferrule 22 to move in the direction of the first ferrule 21, squeezing the first pry bar 23 and the second pry bar 24 to rotate relative to each other along the crease groove and pry them up. With the guidance of the crease groove, the first pry bar 23 and the second pry bar 24 deform to form the first mechanical anti-loosening barrier. At the same time, the inclined insertion rod 26 on the second pry bar 24 is inserted obliquely along the guide groove between the limiting strips 25 to form a secondary limit. This double anti-loosening structure of the device effectively reduces the micro-slippage of the threads under vibration environment, improves the reliability of anti-detachment, and enhances the user's control over the connection stability.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments.

Claims

1. A fastener for preventing detachment, comprising a bolt (11) and a nut (12), characterized in that: The nut (12) is fitted onto the bolt (11) and threadedly connected to the bolt (11). A fastening assembly for fixing is provided between the bolt (11) and the nut (12). A flat washer (13) is provided between the fastening assembly and the nut (12). The flat washer (13) is fitted onto the bolt (11). The fastening assembly includes a first retainer (21) and a second retainer (22). Both the first retainer (21) and the second retainer (22) are fitted onto the bolt (11). One end of the first retainer (21) and the second retainer (22) is integrally formed with multiple sets of first pry bars (23) and multiple sets of second pry bars (24).

2. The anti-loosening fastener according to claim 1, characterized in that: Multiple sets of first warp pieces (23) and multiple sets of second warp pieces (24) are rotatably connected, and crease grooves are provided on multiple sets of first warp pieces (23) and multiple sets of second warp pieces (24).

3. The anti-loosening fastener according to claim 2, characterized in that: The first sleeve (21) has multiple sets of limiting strips (25) integrally formed at one end. The multiple sets of limiting strips (25) are located between the multiple sets of the first pry bar (23), and guide grooves are provided between the multiple sets of limiting strips (25).

4. The anti-loosening fastener according to claim 3, characterized in that: The second rocker plate (24) has multiple sets of insert rods (26) at one end. Each set of insert rods (26) is inclined at one end and corresponds to one of the multiple sets of guide grooves.

5. The anti-loosening fastener according to claim 1, characterized in that: The flat washer (13) is located between the first sleeve (21) and the nut (12). One end of the flat washer (13) is integrally formed with multiple sets of first sealing cut rings (31), and the other end is fitted with a gasket. The gasket is fitted onto the bolt (11) and is made of rubber.

6. The anti-loosening fastener according to claim 5, characterized in that: The first ferrule (21) has a force-bearing head (32) integrally formed at one end, and a second sealing cut ring (33) integrally formed at the other end. The force-bearing head (32) is connected to the first ferrule (21) through multiple sets of reinforcing ribs.

7. The anti-loosening fastener according to claim 1, characterized in that: One end of the bolt (11) is integrally formed with a breakthrough head (14). Multiple sets of balls are provided between the breakthrough head (14) and the second ferrule (22). One end of the multiple sets of balls is located inside the breakthrough head (14), and the other end is in contact with the second ferrule (22).

Images