Hasp seat with anti-loosening structure

Abstract

The utility model provides a hasp seat with an anti-loosening structure, which comprises a hasp seat body, a baffle plate and a limiting block, the baffle plate and the limiting block are rotatably arranged on the hasp seat body, and the baffle plate and the limiting block are rotatably connected with the hasp seat body through shaft pins; the shaft pin comprises a bolt, a nut is sleeved at one threaded end of the bolt, a spring washer is arranged on one side, facing the hasp seat body, of the nut, a square head is fixed at the end of the bolt, a baffle ring is sleeved on the square head, a square sleeve hole of the baffle ring is matched with the square head, and a clamping table is fixed on one side, facing the nut, of the baffle ring. A clamping groove matched with the clamping table is formed in the side, facing the baffle ring, of the nut, and the clamping table is embedded into the clamping groove to prevent the nut from rotating. A stopping mechanism is arranged on the square head and comprises a stop pin, a movable block, a spring and a stop screw, the stop pin is inserted into the guide hole, the movable block is connected with the stop pin and located in the containing hole, and the spring is arranged between the movable block and the stop screw, so that the stop pin elastically extends out of the stop ring all the time to stop the stop ring, and the stop ring is prevented from falling off.

Description

Technical Field

[0001] This utility model belongs to the field of hook and loop fastener technology, specifically relating to a hook and loop fastener with an anti-loosening structure. Background Technology

[0002] Hook and loop fasteners are common mechanical connection devices widely used in various structures requiring quick fixing and release, such as enclosures, door locks, and equipment housings. Their main function is to achieve a secure connection between components through mechanical engagement and locking mechanisms, and to easily unlock them when needed. However, during long-term use, due to vibration, impact, or external forces, the threaded connections in traditional hook and loop fasteners are prone to loosening, leading to decreased connection reliability and even affecting the safety of the overall structure.

[0003] Currently, most common latches on the market are secured with fasteners such as bolts and nuts, with some structures also incorporating spring washers or locking washers to enhance the stability of the threaded connection. However, these methods still have certain limitations, mainly in the following aspects: First, structures relying solely on threaded connections and washers for anti-loosening may still experience nut loosening due to vibration or impact during long-term use, thus affecting the stability of the latch. Second, some anti-loosening mechanisms rely on additional fasteners or welding methods, making installation and maintenance cumbersome and hindering convenience and economy in practical applications. Finally, some existing anti-loosening structures fail to adequately consider the rotational constraints of threaded connections, leading to a gradual weakening of the fastening effect under high-frequency use, thereby affecting the connection quality. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a latch seat with an anti-loosening structure. Through a special retaining ring design and blocking mechanism, the nut remains stable even when subjected to vibration or external force, thereby effectively preventing loosening and ensuring the long-term stability of the latch seat. At the same time, this structure is also convenient to install and easy to operate, making it suitable for various scenarios requiring high-reliability fastening.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A latch seat with an anti-loosening structure includes a latch seat body, and a baffle and a limiting block rotatably mounted on the latch seat body. The baffle and the limiting block are rotatably connected to the latch seat body via a pin.

[0007] The pin includes a bolt, a nut is fitted on one threaded end of the bolt, a spring washer is provided on the side of the nut facing the buckle body, a square head is fixed at one end of the bolt thread, and a retaining ring is fitted on the square head to engage with the nut and prevent the nut from rotating.

[0008] The square head is equipped with a blocking mechanism to prevent the retaining ring from falling off. The blocking mechanism can be elastically retracted into the square head.

[0009] Furthermore, a square sleeve hole is provided in the center of the retaining ring, and a protruding retaining plate is fixed on the side of the retaining ring facing the nut.

[0010] Furthermore, a groove is provided on the side of the nut facing the retaining ring, and the width of the groove is the same as the width of the retaining platform.

[0011] Furthermore, a guide hole is provided on one side of the square head, and a receiving hole communicating with the guide hole is provided on the other side of the square head. An internal thread is provided near the port of the receiving hole.

[0012] Furthermore, the blocking mechanism includes a stop pin inserted in the guide hole and a stop screw installed on the internal thread. A movable block is fixed at one end of the stop pin located in the receiving hole, and a spring is provided between the movable block and the stop screw.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model provides a latch seat with an anti-loosening structure. Compared with the prior art, this latch seat improves the stability of the connection and the anti-loosening ability through optimized structural design, ensuring that the fasteners will not loosen due to vibration or external impact during long-term use, thereby improving the reliability and safety of the latch seat.

[0015] This invention features a retaining ring within the nut's groove. The retaining ring's retaining structure fits tightly with the nut's groove, preventing the nut from rotating under external force and ensuring it remains in a pre-tightened state. The retaining ring itself does not rotate through the engagement of a square sleeve hole and a square head, further enhancing the anti-loosening effect. Compared to traditional methods relying on spring washers or double nuts for locking, this design provides a more reliable mechanical anti-loosening structure that maintains a tight fit even under high vibration environments, making it suitable for applications requiring high-strength anti-loosening measures.

[0016] This invention features a blocking mechanism on the square head. This mechanism, through the combined action of a stop pin, a movable block, and a spring, ensures the retaining ring is always blocked, preventing accidental detachment. The spring's elasticity ensures the stop pin remains extended and firmly presses against the retaining ring, maintaining a stable locking state even under external vibration or impact. Compared to traditional locking plates or adhesive methods, this blocking mechanism offers better stability and durability, and provides effective anti-loosening protection without affecting the normal operation of the latch seat.

[0017] The main components of this utility model, such as the latch seat body, baffle, and limiting block, are all made of high-strength materials and undergo surface treatment to enhance corrosion resistance and wear resistance, making them suitable for various complex environments. The high dimensional accuracy of key fasteners such as bolts, nuts, and retaining rings ensures a tight fit of the overall structure, preventing loosening due to dimensional errors and improving product reliability and service life. Furthermore, the overall design simplifies the installation and maintenance process, requiring no additional anti-loosening components or special tools for assembly, thus enhancing ease of operation.

[0018] This invention's anti-loosening structure is suitable for various mechanical connection scenarios, especially for high-vibration and high-impact environments, such as transportation equipment, industrial machinery, and heavy equipment. In these applications, this anti-loosening latch effectively reduces equipment failures caused by loose threads, improving the safety and stability of equipment operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the shaft pin structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the retaining ring of this utility model;

[0022] Figure 4 This is a schematic diagram of the nut according to the present invention;

[0023] Figure 5 This is a schematic diagram of the square head of this utility model;

[0024] Figure 6 This is a schematic diagram of the blocking mechanism of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Hook and latch body; 2. Baffle; 3. Shaft pin; 31. Bolt; 32. Nut; 321. Slot; 33. Retaining ring; 331. Sleeve hole; 332. Locking platform; 34. Square head; 341. Guide hole; 342. Receiving hole; 343. Internal thread; 35. Blocking mechanism; 351. Stop pin; 352. Movable block; 353. Spring; 354. Stop screw; 4. Limit block. Detailed Implementation

[0027] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. Example

[0028] like Figure 1 As shown, a latch seat with an anti-loosening structure includes a latch seat body 1, and a baffle 2 and a limiting block 4 rotatably mounted on the latch seat body 1. The baffle 2 and the limiting block 4 are rotatably connected to the latch seat body 1 via a pin 3. The latch seat body 1 is made of Q235 carbon steel and the surface is electro-galvanized to improve corrosion resistance and enhance mechanical strength. The baffle 2 and the limiting block 4 are made of 45# steel and are quenched to improve hardness and wear resistance, making them less prone to deformation and damage during long-term use. The pin 3, as a key component connecting the baffle 2, the limiting block 4 and the latch seat body 1, needs to have high strength and fatigue resistance to ensure that the latch seat can maintain a stable connection when subjected to high-frequency opening and closing operations.

[0029] like Figure 2 As shown, the shaft pin 3 includes a bolt 31, with a nut 32 fitted onto the threaded end of the bolt 31. A spring washer is provided on the side of the nut 32 facing the latch body 1. The spring washer is made of 65Mn spring steel and undergoes a heat treatment process to improve its elastic recovery ability, thereby enhancing the anti-loosening effect. A square head 34 is fixed to the end of the threaded end of the bolt 31. The square head 34 is made of 40Cr alloy steel and undergoes surface nitriding treatment to improve its wear resistance and fatigue strength, so that it can remain stable under high load conditions. A retaining ring 33 is fitted onto the square head 34 to engage with the nut 32 and prevent the nut 32 from rotating. The retaining ring 33 is made of 304 stainless steel to ensure that it will not rust due to environmental factors during long-term use, thus affecting the anti-loosening effect.

[0030] The square head 34 is equipped with a blocking mechanism 35 to prevent the retaining ring 33 from falling off. The blocking mechanism 35 can be elastically retracted into the square head 34. The design of the blocking mechanism 35 ensures that the retaining ring 33 will not fall off accidentally due to loosening when subjected to vibration or external impact, thereby improving the stability and safety of the buckle seat. The overall dimensions of the blocking mechanism 35 have been precisely calculated so that it can maintain good elasticity without affecting the normal opening and closing operation of the buckle seat.

[0031] like Figure 3As shown, the retaining ring 33 has a square sleeve hole 331 in the center, and a protruding retaining plate 332 is fixed on the side of the retaining ring 33 facing the nut 32. The size of the square sleeve hole 331 strictly matches the outer dimensions of the square head 34 to ensure a tight fit and prevent the retaining ring 33 from loosening or shifting during use. The height of the retaining plate 332 is designed to be 1.5mm, which can be accurately embedded in the retaining groove 321 of the nut 32, thereby ensuring the stability of the anti-loosening structure. The retaining plate 332 is made of wear-resistant stainless steel to improve impact resistance and enable it to maintain its anti-loosening function for a long time.

[0032] like Figure 4 As shown, the nut 32 has a slot 321 on the side facing the retaining ring 33. The width of the slot 321 is the same as the width of the retaining platform 332, which is set to 3.0mm to ensure that the retaining platform 332 can be firmly embedded and will not loosen due to excessive gap. The nut 32 is made of high-strength alloy steel and has undergone oxidation and blackening treatment to improve its corrosion resistance, so that it can be used for a long time in harsh environments without affecting its performance. The thread specification of the nut 32 is M8×1.25, which can provide sufficient locking force and is suitable for different installation scenarios.

[0033] like Figure 5 As shown, a guide hole 341 with a diameter of 2.5 mm is provided on one side of the square head 34 to ensure that the stop pin 351 can be smoothly inserted and effectively block the movement. A receiving hole 342 communicating with the guide hole 341 is provided on the other side of the square head 34. An internal thread 343 is provided near the end of the receiving hole 342. The pitch of the internal thread 343 is 0.8 mm to ensure that the stop screw 354 can be reliably fixed and to maintain the structural integrity of the blocking mechanism 35. The overall size design of the square head 34 takes into account the material strength and processing technology to ensure that it will not deform under repeated stress during long-term use.

[0034] like Figure 6 As shown, the blocking mechanism 35 includes a stop pin 351 inserted into the guide hole 341 and a stop screw 354 installed on the internal thread 343. A movable block 352 is fixed to one end of the stop pin 351 located in the receiving hole 342. The movable block 352 is made of high carbon steel and is precision machined to ensure that it can form a good linkage mechanism with the stop pin 351. A spring 353 is provided between the movable block 352 and the stop screw 354. The spring 353 has a diameter of 1.2mm, is made of 65Mn spring steel, and is tempered to ensure its elastic stability and long-term fatigue resistance. The stop screw 354 is made of nickel-plated alloy steel, which can improve corrosion resistance while ensuring high strength, so that it can maintain a stable fixing function in different environments. Example

[0035] This embodiment provides a latch seat with an anti-loosening structure. By optimizing the connection structure, the latch seat improves stability and anti-loosening effect, ensuring that the fasteners will not loosen due to vibration or external impact during long-term use, thus improving the reliability of the latch seat.

[0036] like Figure 1 As shown, the latch body 1 is made of Q235 carbon steel and galvanized to improve corrosion resistance and mechanical strength; the baffle 2 and the limiting block 4 are made of 45 steel and quenched at high temperature to enhance wear resistance and hardness; the pin 3 includes a bolt 31, which is M8×1.25 and made of 40Cr alloy steel and nitrided to improve surface hardness and fatigue resistance; the threaded end of the bolt 31 is fitted with a nut 32, which matches the bolt in size, and a spring washer is added to the side of the bolt facing the latch body 1. The spring washer is made of 65Mn spring steel and tempered at high temperature to improve elasticity and fatigue resistance, so as to effectively prevent the nut from loosening due to vibration. Example

[0037] This embodiment provides an anti-loosening structure that uses a retaining ring to engage with a nut. This structure ensures that the nut is always locked and will not loosen even under high vibration conditions.

[0038] like Figure 2 As shown, a square head 34 is fixed to the end of the bolt 31. The square head 34 is made of 40Cr alloy steel and has undergone nitriding treatment to improve wear resistance and fatigue strength. A retaining ring 33 is fitted onto the square head 34. The retaining ring 33 is made of 304 stainless steel to prevent rust and improve the anti-loosening effect. A square sleeve hole 331 is provided in the center of the retaining ring 33. The size of the square sleeve hole 331 is strictly matched with the square head 34 to ensure no gap during assembly and to prevent the retaining ring from rotating or loosening during use. A protruding retaining platform 332 is provided on the side of the retaining ring 33 facing the nut 32. The retaining platform 332 is designed with a height of 1.5mm and a width of 3.0mm. It matches the retaining groove 321 opened on the side of the nut 32 facing the retaining ring to ensure that the retaining platform 332 is firmly embedded in the retaining groove 321, thereby preventing the nut 32 from rotating and loosening due to vibration or impact and improving the reliability of the latch seat. Example

[0039] This embodiment provides an optimized design for the blocking mechanism 35, which ensures that the retaining ring 33 will not accidentally fall off due to external forces during long-term use, thereby improving the overall stability and safety of the latch seat.

[0040] like Figure 5 , 6As shown, one side of the square head 34 is provided with a guide hole 341, the diameter of which is set to 2.5mm to ensure that the stop pin 351 can be smoothly inserted; the other side of the square head 34 is provided with a receiving hole 342, and the receiving hole 342 has an internal thread 343 near the port, the pitch of which is set to 0.8mm to ensure that the stop screw 354 can be tightly fixed and to prevent loosening; the blocking mechanism 35 includes a stop pin 351, a movable block 352, a spring 353 and a stop screw 354. The stop pin 351 is inserted into the guide hole 341 and extends outward, and its end located in the receiving hole 342 is fixedly connected to the movable block 352. 352 is made of high-carbon steel and is machined with high precision to ensure reliable linkage with the stop pin 351; a spring 353 is provided between the movable block 352 and the stop screw 354. The diameter of the spring 353 is set at 1.2mm, made of 65Mn spring steel, and tempered to improve elastic stability and fatigue resistance; when the stop pin 351 is subjected to external force, it can retract along the guide hole 341 into the square head 34. When the external force disappears, the spring 353 returns to its original position, allowing the stop pin 351 to extend again and block the movement of the retaining ring 33, thereby effectively preventing the retaining ring 33 from falling off and improving the anti-loosening effect. Example

[0041] This embodiment provides an optimized material and structural matching design that enables the latch seat to maintain stable performance in different environments and improves its overall service life.

[0042] like Figures 1 to 6 As shown, the main structures of the latch seat, such as the body 1, baffle 2, and limiting block 4, are all made of high-strength materials and have undergone surface protection treatment to improve wear resistance and corrosion resistance, making them suitable for complex environments such as high humidity and strong vibration. The tolerances of fastening components such as bolts 31, nuts 32, and retaining rings 33 are controlled within ±0.02mm to ensure tight assembly and avoid loosening caused by dimensional errors. The optimization of the overall structure enables the latch seat to withstand more than 10,000 opening and closing operations without affecting its anti-loosening performance, significantly improving the reliability and durability of the product. In addition, the assembly process of this latch seat is simple, requiring only conventional tools to complete installation and disassembly without the need for additional auxiliary fasteners, reducing usage costs and improving maintenance convenience. Example

[0043] This embodiment provides a latch seat suitable for different industrial application scenarios. This latch seat is particularly suitable for high vibration and high impact environments, such as transportation equipment, industrial machinery, heavy equipment and other fields.

[0044] like Figures 1 to 6As shown, this latch seat has a compact structure and adopts a modular design, making it suitable for mechanical connections of different sizes. The fit between the nut 32 and the retaining ring 33 ensures that it will not loosen in high vibration environments, improving the safety and stability of the equipment. The optimized design of the blocking mechanism 35 prevents the retaining ring 33 from accidentally falling off, thus ensuring the long-term reliability of the latch seat. Tests show that after 100 hours of continuous use in an environment with a vibration frequency as high as 50Hz, the nut 32 did not loosen, demonstrating excellent anti-loosening performance. In addition, this latch seat is suitable for a temperature range of -40℃ to 120℃ and can work normally in extreme environments, further broadening its application range and market prospects.

[0045] The working principle of this utility model is as follows: When the baffle 2 or the limiting block 4 is rotated and installed using the shaft pin 3, one end of the thread of the bolt 31 is passed through the baffle 2 or the limiting block 4 and through the buckle seat body 1. At this time, the spring washer is put on the bolt 31 and the nut 32 is screwed on the bolt 31 to tighten it. Then, the retaining ring 33 is put on the square head 34 and the locking platform 332 is locked in the slot 321 on the nut 32. The blocking mechanism 35 on the square head 34 blocks the retaining ring 33 to prevent it from falling off. At this time, the cooperation between the square head 34 and the square sleeve hole 331 prevents the retaining ring 33 from rotating. The retaining ring 33 is locked in the slot 321 by the locking platform 332 to prevent the nut 32 from rotating, thereby preventing the nut 32 from loosening, and thus completing the anti-loosening installation of the baffle 2 and the limiting block 4.

[0046] The blocking mechanism 35 uses a spring 353 to push the movable block 352, causing the stop pin 351 to extend out of the surface of the square head 34, thereby blocking the stop ring 33.

[0047] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A hook and loop fastener with an anti-loosening structure, comprising a hook and loop fastener body (1), and a baffle (2) and a limiting block (4) rotatably mounted on the hook and loop fastener body (1), characterized in that: Both the baffle (2) and the limiting block (4) are rotatably connected to the buckle seat body (1) via a pivot pin (3); The pin (3) includes a bolt (31), a nut (32) is fitted on one threaded end of the bolt (31), a spring washer is provided on the side of the nut (32) facing the buckle body (1), a square head (34) is fixed at one end of the threaded end of the bolt (31), and a retaining ring (33) is fitted on the square head (34) to engage with the nut (32) and prevent the nut (32) from rotating. The square head (34) is equipped with a blocking mechanism (35) to prevent the retaining ring (33) from falling off. The blocking mechanism (35) can be elastically retracted into the square head (34).

2. The latch seat with an anti-loosening structure according to claim 1, characterized in that: The center of the retaining ring (33) is provided with a square sleeve hole (331), and a protruding retaining plate (332) is fixed on the side of the retaining ring (33) facing the nut (32).

3. A latch seat with an anti-loosening structure according to claim 2, characterized in that: The nut (32) has a slot (321) on the side facing the retaining ring (33), and the width of the slot (321) is the same as the width of the mounting plate (332).

4. A latch seat with an anti-loosening structure according to claim 1, characterized in that: The square head (34) has a guide hole (341) on one side and a receiving hole (342) communicating with the guide hole (341) on the other side. The receiving hole (342) has an internal thread (343) near the port.

5. A latch seat with an anti-loosening structure according to claim 4, characterized in that: The blocking mechanism (35) includes a stop pin (351) inserted in the guide hole (341) and a stop screw (354) installed on the internal thread (343). A movable block (352) is fixed at one end of the stop pin (351) located in the receiving hole (342). A spring (353) is provided between the movable block (352) and the stop screw (354).

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