A fastener to prevent detachment

Abstract

This utility model relates to the field of fastener technology, and provides a fastener to prevent loosening, comprising a bolt fastener; a nut fastener disposed outside the teeth; and an anti-loosening structure, which includes a reinforcing component and an auxiliary fixing bolt, the anti-loosening structure being disposed within a limiting groove, the anti-loosening structure being used to limit the nut fastener and prevent it from loosening. This technical solution solves the problem in the prior art where fasteners, during use, often achieve fastening by tightening the nut to make the washer and the surface of the fastened part fit together, but after prolonged use, the friction between the nut and bolt threads gradually decreases, and the initially applied preload also decreases. This results in the washer no longer being able to effectively distribute pressure or protect the surface, leading to a poorer fixing effect, and in severe cases, direct detachment, affecting the safety of equipment use.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to a fastener for preventing detachment. Background Technology

[0002] In the complex landscape of industrial manufacturing and engineering construction, the reliability and durability of fasteners are often the unseen cornerstones for ensuring structural safety, extending equipment lifespan, and maintaining operational efficiency. However, the loosening and corrosion problems exposed by traditional bolt-nut fasteners under harsh conditions such as vibration, dynamic loads, temperature fluctuations, or corrosive media have long been a pain point in the engineering field. Loosening leads to the loss of preload, which can cause minor issues like abnormal equipment noise and misalignment, or more serious issues like connection failure and component detachment, resulting in safety hazards and production stoppages. At the same time, environmental corrosion directly erodes the fastener itself, weakening its mechanical strength and accelerating the deterioration process.

[0003] Existing fasteners typically consist of a bolt, a nut, and a washer. During use, the nut is tightened to bring the washer into contact with the surface of the part being fastened, thus achieving the fastening process. However, after prolonged use, the friction between the threads of the nut and the bolt gradually decreases, and the initial preload also decreases. This causes the washer to be unable to effectively distribute pressure or protect the surface, resulting in a poorer fastening effect. In severe cases, it may even fall off, affecting the safety of equipment use. Utility Model Content

[0004] To overcome the above-mentioned defects, this utility model provides a fastener to prevent detachment. It solves the problem that existing fasteners in the prior art usually consist of a bolt, a nut, and a washer. In use, the nut is tightened to make the washer fit against the surface of the fixed part, thereby achieving the fastening process. However, after long-term use, the friction between the threaded meshing pair of the nut and the bolt will gradually decrease, and the initial preload will also decrease. This will cause the washer to be unable to effectively distribute pressure or protect the surface, resulting in a poor fastening effect. In severe cases, it may even fall off directly, affecting the safety of equipment use.

[0005] According to one aspect, at least one embodiment of the present invention provides a fastener for preventing detachment, comprising:

[0006] A bolt fastener, comprising a bolt body, the bolt body having teeth on its exterior and limit grooves formed inside the bolt body, the limit grooves having internal thread grooves.

[0007] A nut fastener, wherein the nut fastener is disposed outside the teeth, the nut fastener includes a nut body that is threadedly connected to the teeth, a limiting ring is fixedly connected to the side of the nut body, the nut body and the limiting ring are an integral structure, and several sets of slots are provided on the outer side of the limiting ring.

[0008] The anti-loosening structure includes a reinforcing component and an auxiliary fixing bolt. The anti-loosening structure is set in a limiting groove and is used to limit the nut fastener to prevent the nut fastener from loosening.

[0009] For example, in at least one embodiment of the present invention, a fastener for preventing detachment is provided, which further includes: the reinforcing component includes a reinforcing connector disposed in a limiting groove, the top and bottom of the reinforcing connector are provided with limiting protrusions, the limiting protrusions and the limiting groove are fitted in shape, and the reinforcing connector slides in the limiting groove.

[0010] For example, in at least one embodiment of the present invention, a fastener for preventing detachment is provided, which further includes: a through groove is provided at the center of the reinforcing connector, and fixing parts are provided on both sides of the reinforcing connector, wherein the side of the fixing part is fitted with the limiting ring.

[0011] For example, in at least one embodiment of the present invention, a fastener for preventing detachment is provided, which further includes: a groove is provided inside the reinforcing connector, a piston rod is slidably connected in the groove, and a spring is provided outside the piston rod body.

[0012] For example, in at least one embodiment of the present invention, a fastener for preventing detachment is provided, which further includes: one end of the spring is fixedly connected to the piston rod, the other end of the spring is fixedly connected to the inner wall of the slide groove, and a damping rod is provided inside the spring.

[0013] For example, in at least one embodiment of the present invention, a fastener for preventing detachment is provided, which further includes: a lever fixedly connected to the side of the piston rod, an insert rod fixedly connected to the side of the lever by welding, and the insert rod being inserted into a slot on the outside of the limiting ring.

[0014] For example, in at least one embodiment of the present invention, a fastener for preventing detachment is provided, which further includes: the nut of the auxiliary fixing bolt and the through groove insertion, and the screw of the auxiliary fixing bolt and the internal thread groove threaded connection.

[0015] For example, in at least one embodiment of the present invention, a fastener for preventing detachment is provided, which further includes: a cross groove is provided on the side of the nut of the auxiliary fixing bolt, and the auxiliary fixing bolt is provided in multiple sets.

[0016] The beneficial effects of the embodiments of this utility model are as follows:

[0017] In this invention, by setting an anti-loosening structure, after the bolt and nut fasteners are tightened and fixed, a supporting force is applied to the side of the nut fastener during use to limit its movement, effectively preventing slippage and ensuring the stability of the connection. The auxiliary fixing bolt is threaded into the internal thread groove, allowing the reinforced connector and the nut fastener to abut against each other, axially locking and limiting the nut fastener to ensure the stability of the connection. Furthermore, to ensure the auxiliary fixing bolts can be screwed into the internal thread groove and achieve effective connection, multiple sets of auxiliary fixing bolts with different lengths are provided, allowing the operator to select the appropriate auxiliary fixing bolt. When bolting, an auxiliary fixing bolt matching the length of the distance range between the starting position of the internal thread groove and the slot on the side of the limiting ring should be selected. Then, the spring in the reinforcing component drives the pull block and the insertion rod to insert into the slot on the side of the limiting ring, so that the reinforcing component and the nut fastener are connected, and the nut fastener is circumferentially locked and limited. This device locks the position of the nut fastener in both axial and circumferential directions, providing a stable and anti-loosening support for the connection position of the nut fastener. It can effectively prevent the nut from loosening or falling off after long-term use, thereby significantly improving the stability and safety of the entire fastener connection node. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0019] Figure 1 This is an exploded view of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the bolt structure of this utility model;

[0021] Figure 3 This is an exploded view of the anti-detachment structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the reinforcement component of this utility model;

[0023] Figure 5 For the present utility model Figure 4 Enlarged view of a portion;

[0024] In the diagram: 1. Bolt fastener; 2. Nut fastener; 3. Reinforcing component; 4. Auxiliary fixing bolt; 5. Cross groove; 101. Bolt body; 102. Teeth; 103. Limiting groove; 104. Internal thread groove; 201. Nut body; 202. Limiting ring; 301. Reinforcing connector; 302. Through groove; 303. Fixing part; 304. Limiting protrusion; 305. Slide groove; 306. Piston rod; 307. Pulley; 308. Insert rod; 309. Spring. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0026] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] like Figures 1-5 As shown, it illustrates a fastener for preventing detachment in one embodiment of the present invention, comprising:

[0032] Bolt fastener 1 includes bolt body 101, the bolt body 101 is provided with teeth 102 on the outside, and limit grooves 103 are respectively opened in the inside of the bolt body 101, and internal thread grooves 104 are opened in the limit grooves 103.

[0033] Nut fastener 2 is provided on the outside of tooth 102. Nut fastener 2 includes nut body 201 which is threadedly connected to tooth 102. Limiting ring 202 is fixedly connected to the side of nut body 201. Nut body 201 and limiting ring 202 are integral structures. Several sets of slots are provided on the outer side of limiting ring 202.

[0034] The anti-loosening structure includes a reinforcing component 3 and an auxiliary fixing bolt 4. The anti-loosening structure is set in the limiting groove 103 and is used to limit the nut fastener 2 to prevent the nut fastener 2 from loosening.

[0035] The reinforcing component 3 includes a reinforcing connector 301 disposed in the limiting groove 103. The top and bottom of the reinforcing connector 301 are provided with limiting protrusions 304. The limiting protrusions 304 and the limiting groove 103 fit together in shape, and the reinforcing connector 301 slides in the limiting groove 103.

[0036] A through groove 302 is provided at the center of the reinforcing connector 301, and a fixing part 303 is provided on both sides of the reinforcing connector 301. The side of the fixing part 303 fits against the limiting ring 202.

[0037] The reinforcing connector 301 has a sliding groove 305 inside, and a piston rod 306 is slidably connected in the sliding groove 305. A spring 309 is provided on the outside of the piston rod 306.

[0038] One end of the spring 309 is fixedly connected to the piston rod 306, and the other end of the spring 309 is fixedly connected to the inner wall of the slide groove 305. A damping rod is provided inside the spring 309.

[0039] A lever 307 is fixedly connected to the side of the piston rod 306. A plug rod 308 is fixedly connected to the side of the lever 307 by welding. The plug rod 308 is inserted into the slot on the outside of the limiting ring 202.

[0040] The nut of the auxiliary fixing bolt 4 is inserted into the through groove 302, and the screw of the auxiliary fixing bolt 4 is threaded into the internal thread groove 104.

[0041] The nut of the auxiliary fixing bolt 4 has a cross groove 5 on its side, and the auxiliary fixing bolt 4 is set in multiple sets.

[0042] In this embodiment, during use, the operator first passes the bolt body 101 through the part to be fixed, and then tightens the nut body 201 outside the teeth 102 of the bolt body 101. After the basic tightening operation is completed, the reinforcing connector 301 is inserted from one side of the limiting groove 103 of the bolt body 101 into the limiting groove 103, and the auxiliary fixing bolt 4 is inserted along the through groove 302. Then, the operator uses a Phillips screwdriver to insert into the Phillips groove 5 on the nut of the auxiliary fixing bolt 4 and rotates the screwdriver, thereby driving the auxiliary fixing bolt 4 and the reinforcing component 3 to move along the limiting groove 103 toward the side of the nut body 201.

[0043] During this process, the auxiliary fixing bolt 4 gradually screws into the internal thread groove 104 provided in the bolt body 101. The limiting protrusions 304 provided at the top and bottom of the reinforcing connector 301 ensure stable movement of the reinforcing component 3 during movement and during the screwing in of the auxiliary fixing bolt 4, preventing skewing or jamming and significantly improving operational convenience. Multiple sets of auxiliary fixing bolts 4 with different lengths are provided. When selecting the auxiliary fixing bolt 4, the operator must choose an auxiliary fixing bolt 4 that matches the distance range between the starting position of the internal thread groove 104 and the side slot of the limiting ring 202, thereby ensuring that the auxiliary fixing bolt 4 can be screwed into the internal thread groove 104 and achieve effective connection.

[0044] Subsequently, to ensure that the overall structure formed by the reinforcing connector 301 and the fixing part 303 can fit snugly against the side of the limiting ring 202, the operator needs to move the levers 307 on both sides of the reinforcing connector 301 respectively, so that the insert rod 308 fixedly connected to the side of the lever 307 retracts into the fixing part 303. Then, the auxiliary fixing bolt 4 is screwed into the internal thread groove 104 until the overall structure formed by the reinforcing connector 301 and the fixing part 303 fits tightly against the side of the limiting ring 202. At this time, the overall structure formed by the reinforcing connector 301 and the fixing part 303 can apply a strong axial support force to the limiting ring 202 when the fastener is working. This achieves mechanical limiting of the nut fastener 2 in the axial direction, effectively preventing the nut fastener 2 from loosening along the axial direction of the bolt body 101 during use.

[0045] Finally, the levers 307 on both sides are released. At this time, the compressed return spring 309 quickly returns to its original position under the action of the elastic force. During the return process of the spring 309, the spring 309 drives the piston rods 306 and levers 307 on both sides to move to the middle position, thereby driving the insertion rod 308 to extend out from the fixed part 303 and insert into the slot opened on the outside of the limiting ring 202. The number of slots is even and the slots are closely arranged. This process can realize the circumferential locking between the reinforcing component 3 and the nut fastener 2, and can effectively prevent the nut fastener 2 from loosening due to the circumferential rotation of the bolt fastener 1 and the nut fastener 2.

[0046] This device locks the position of the nut fastener 2 in both axial and circumferential directions, providing a stable and non-detachable support for the connection position of the nut fastener 2. It can effectively prevent the nut from loosening or falling off after long-term use, thereby significantly improving the stability and safety of the entire fastener connection node.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fastener for preventing detachment, characterized in that, include: The bolt fastener (1) includes a bolt body (101), the bolt body (101) is provided with teeth (102) on the outside, and limit grooves (103) are respectively opened inside the bolt body (101), and internal thread grooves (104) are opened in the limit grooves (103). Nut fastener (2), the nut fastener (2) is disposed outside the teeth (102), the nut fastener (2) includes a nut body (201) that is threadedly connected to the teeth (102), a limiting ring (202) is fixedly connected to the side of the nut body (201), the nut body (201) and the limiting ring (202) are an integral structure, and several sets of slots are opened on the outer side of the limiting ring (202); The anti-loosening structure includes a reinforcing component (3) and an auxiliary fixing bolt (4). The anti-loosening structure is set in a limiting groove (103) and is used to limit the nut fastener (2) to prevent the nut fastener (2) from loosening.

2. The fastener for preventing detachment according to claim 1, characterized in that, The reinforcement component (3) includes a reinforcement connector (301) disposed in a limiting groove (103). The top and bottom of the reinforcement connector (301) are provided with limiting protrusions (304). The limiting protrusions (304) and the limiting groove (103) fit together in shape. The reinforcement connector (301) slides in the limiting groove (103).

3. The fastener for preventing detachment according to claim 2, characterized in that, The reinforcing connector (301) has a through groove (302) at its center, and a fixing part (303) is provided on both sides of the reinforcing connector (301). The side of the fixing part (303) fits against the limiting ring (202).

4. A fastener for preventing detachment according to claim 2, characterized in that, The reinforcing connector (301) has a groove (305) inside, and a piston rod (306) is slidably connected in the groove (305). A spring (309) is provided on the outside of the piston rod (306).

5. A fastener for preventing detachment according to claim 4, characterized in that, One end of the spring (309) is fixedly connected to the piston rod (306), and the other end of the spring (309) is fixedly connected to the inner wall of the slide groove (305). A damping rod is provided inside the spring (309).

6. A fastener for preventing detachment according to claim 4, characterized in that, A lever (307) is fixedly connected to the side of the piston rod (306), and a plug rod (308) is fixedly connected to the side of the lever (307) by welding. The plug rod (308) is inserted into the slot on the outside of the limiting ring (202).

7. A fastener for preventing detachment according to claim 1, characterized in that, The nut of the auxiliary fixing bolt (4) is inserted into the through groove (302), and the screw of the auxiliary fixing bolt (4) is threaded into the internal thread groove (104).

8. A fastener for preventing detachment according to claim 1, characterized in that, The auxiliary fixing bolt (4) has a cross groove (5) on the side of the nut, and the auxiliary fixing bolt (4) is configured in multiple sets.

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