Nut with anti-loosening structure

Abstract

The utility model relates to the technical field of locknuts, in particular to a nut with an anti-loosening structure, which comprises a nut main body, the nut main body is in threaded connection with a bolt, and the bolt and the nut main body are respectively provided with an anti-loosening mechanism which is used for providing elastic fastening force to enable the bolt and the nut main body to maintain stable pressure. The first elastic reset piece is tightened through the connecting pad, and when the nut body and the bolt are in threaded connection on the two sides of the part, a worker does not need to apply force for tightening the first elastic reset piece. And a worker can rotate a blade to cut a connecting pad to relieve contraction limiting, so that a first elastic reset piece works normally, and the technical problems that the extrusion force of the anti-loosening piece and the thread body is too large, the worker needs to apply large force to drive the elastic anti-loosening piece to deform, and the nut anti-loosening difficulty is increased are solved.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening nuts, specifically to a nut with an anti-loosening structure. Background Technology

[0002] A nut is a threaded mechanical part, typically used in conjunction with a bolt to form a secure connection through tightening. Nuts are usually made of metal, and common types include hexagonal nuts, round nuts, and square nuts. Nuts, together with bolts or screws, serve to fix and connect two or more components. By rotating the nut, components are tightened together, ensuring they are secure and do not loosen. Nuts are removable fasteners, offering greater flexibility compared to welding or riveting, allowing for disassembly and reconnection as needed. Nut connections provide greater convenience, especially during maintenance and repair.

[0003] Chinese Patent Publication No. CN109139670A discloses a composite anti-loosening nut, comprising a nut body, an elastic anti-loosening element disposed on the nut body, a countersunk hole axially provided on one end face of the nut body, the elastic anti-loosening element being fixedly disposed within the countersunk hole and having a threaded hole coaxial with the central threaded hole of the nut body; elastic elements evenly distributed circumferentially on the lower end face of the elastic anti-loosening element, the elastic elements being integrally formed with the elastic anti-loosening element and the lower end of the elastic elements contacting the bottom of the countersunk hole; a limiting structure is provided at the opening of the countersunk hole, the limiting structure contacting the upper end face of the elastic anti-loosening element. This invention combines the nut body, the elastic anti-loosening element, and the elastic elements. Both the nut body and the elastic anti-loosening element are connected to a screw or bolt. The elastic anti-loosening element tightens the thread or screw, thus preventing loosening, while the elastic elements provide stable axial elastic force, resulting in good anti-loosening effect. Therefore, this invention is suitable for widespread use.

[0004] The aforementioned patent mentions that the elastic anti-loosening component functions by using plastic deformation to clamp the bolt or thread. The limiting structure confines the elastic anti-loosening component inside the countersunk hole, so the limit of axial displacement of the elastic anti-loosening component is the opening of the countersunk hole. Therefore, it is necessary to drive the elastic anti-loosening component to move and compress it against the threaded body. To achieve this effect, sufficient contact and compressive force between the anti-loosening component and the threaded body must be ensured. However, if the compressive force between the anti-loosening component and the threaded body is too large, it can easily lead to workers needing to apply considerable force to drive the elastic anti-loosening component to deform, increasing the difficulty of preventing the nut from loosening. Therefore, we propose a nut with an anti-loosening structure. Summary of the Invention

[0005] To address the aforementioned issues, a nut with an anti-loosening structure is provided. The first elastic reset member is tightened by a connecting washer. When the nut body and the bolt are threaded together on both sides of the component, the operator does not need to apply force to tighten the first elastic reset member. This solves the technical problem that excessive extrusion pressure between the anti-loosening member and the threaded body leads to the operator needing to apply a large force to drive the elastic anti-loosening member to deform, which increases the difficulty of preventing the nut from loosening.

[0006] To address the existing technical problems, this utility model provides a nut with an anti-loosening structure, including a nut body, which is threadedly connected to a bolt. The bolt and the nut body are respectively provided with anti-loosening mechanisms for providing elastic tightening force to maintain stable pressure on the bolt and the nut body; the bolt and the nut body are also provided with synchronization mechanisms for restricting the rotational movement of the nut body on the outside of the bolt.

[0007] Preferably, the anti-loosening mechanism includes a first elastic reset member, a connecting pad, and an unlocking mechanism; the first elastic reset member is sleeved on the outside of the bolt, and the first elastic reset member is used to increase the elastic tightening force of the nut body and the bolt; the connecting pad is disposed on the first elastic reset member, and the connecting pad is connected to the nut body and the bolt respectively, and the connecting pad is used to realize the tightening operation of the first elastic reset member; the unlocking mechanism is disposed on the nut body and the bolt respectively, and the unlocking mechanism is used to release the limiting effect of the connecting pad on the first elastic reset member.

[0008] Preferably, the unlocking mechanism includes a blade and a ring plate; the blade is disposed on a connecting pad; the ring plate is rotatably disposed on the nut body and the bolt respectively, and the inner side of the ring plate is connected to the blade.

[0009] Preferably, the synchronization mechanism includes an extension mechanism, a locking mechanism, a positioning mechanism, and a guiding mechanism; the extension mechanism is mounted on the bolt and is used to cooperate with the axial movement of the nut body; the locking mechanism is mounted on the extension mechanism and the nut body and is used to restrict the nut body and the extension mechanism together; the positioning mechanism is mounted on the extension mechanism and the bolt and is used to assist the extension mechanism in rotating with the bolt; the guiding mechanism is mounted on the extension mechanism and is used to assist the extension mechanism in linear movement.

[0010] Preferably, the extension mechanism includes a connecting pipe, a connecting pipe, and a second elastic reset member; the connecting pipe is sleeved on the outside of the bolt; the connecting pipe is axially slidably sleeved on the outside of the connecting pipe; the second elastic reset member is sleeved on the outside of the connecting pipe, and its two ends are respectively connected to the connecting pipe and the connecting pipe.

[0011] Preferably, the locking mechanism includes a first elastic locking member, a second elastic locking member, and a mounting groove; the first elastic locking member is connected to the connecting pipe; the second elastic locking member is mated with the first elastic locking member and connected to the nut body; the mounting groove is opened on the side of the nut body near the second elastic locking member, and the mounting groove is used to accommodate the locking structure of the first elastic locking member and the second elastic locking member.

[0012] Preferably, the positioning mechanism includes a rod and a slot; the rod is connected to the inside of the connecting tube; the slot is located on the side of the bolt near the rod, and the slot is used to cooperate with the rod for linear movement.

[0013] Preferably, the guiding mechanism includes a slider and a groove; the slider is connected to the connecting pipe; the groove is formed on the side of the connecting pipe near the slider, and the groove is used to cooperate with the slider to move linearly.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. By tightening the first elastic reset component through the connecting washer, and when the nut body and bolt are threaded together on both sides of the component, the operator does not need to apply force to tighten the first elastic reset component. Furthermore, the operator can rotate the blade to cut the connecting washer to release the contraction limit, allowing the first elastic reset component to function normally. This solves the technical problem of excessive compressive force between the anti-loosening component and the threaded body, which previously required the operator to apply significant force to deform the elastic anti-loosening component, increasing the difficulty of preventing nut loosening.

[0016] 2. By using a synchronization mechanism to limit the movement between the nut body and the bolt, the nut body and the bolt can rotate synchronously. This effectively avoids uneven tightening force caused by asynchronous rotation, reduces stress concentration at the connection, and solves the technical problem of uneven force at the connection caused by asynchronous rotation of the nut and bolt, which can easily lead to stress concentration and thus loosening of the connection or structural failure. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a bolt and nut body with an anti-loosening structure and their connection structure.

[0018] Figure 2 This is a three-dimensional schematic diagram of a first elastic reset component and a connecting washer of a nut with an anti-loosening structure, and their connection structure.

[0019] Figure 3 This is a three-dimensional schematic diagram of a first elastic clamp and a second elastic clamp with an anti-loosening structure for a nut, and their connection structure.

[0020] Figure 4 This is a three-dimensional schematic diagram of a nut with an anti-loosening structure, including the blade, ring plate, and their connection structure.

[0021] Figure 5 This is a three-dimensional schematic diagram of a connecting pipe and butt joint with a nut having an anti-loosening structure and its connection structure.

[0022] Figure 6 It is a nut with an anti-loosening structure. Figure 2 Enlarged diagram of point A in the middle.

[0023] The following are the labels in the diagram: 1. Bolt; 11. Nut body; 2. First elastic reset component; 21. Connecting washer; 22. Blade; 23. Ring plate; 24. Connecting pipe; 25. Butt joint pipe; 26. Second elastic reset component; 27. First elastic retainer; 28. Second elastic retainer; 29. ​​Mounting groove; 210. Insert rod; 211. Slot; 212. Slider; 213. Slide groove. Detailed Implementation

[0024] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0025] See Figures 1-2 As shown, a nut with an anti-loosening structure includes a nut body 11, which is threadedly connected to a bolt 1. Anti-loosening mechanisms are respectively provided on the bolt 1 and the nut body 11 to provide elastic tightening force and maintain stable pressure on the bolt 1 and the nut body 11. Synchronization mechanisms are also provided on the bolt 1 and the nut body 11 to restrict the rotational movement of the nut body 11 outside the bolt 1. The anti-loosening mechanism includes a first elastic reset member 2, a connecting washer 21, and an unlocking mechanism. The first elastic reset member 2 is sleeved on the outside of the bolt 1 and is used to increase the tension of the nut body 1. 1. Elastic fastening force of bolt 1; Connecting pad 21 is disposed on the first elastic reset member 2, and the connecting pad 21 is connected to the nut body 11 and bolt 1 respectively. The connecting pad 21 is used to realize the tightening operation of the first elastic reset member 2; Unlocking mechanism is disposed on the nut body 11 and bolt 1 respectively. The unlocking mechanism is used to release the limiting position of the connecting pad 21 on the first elastic reset member 2; The unlocking mechanism includes a blade 22 and a ring plate 23; The blade 22 is disposed on the connecting pad 21; The ring plate 23 is rotatably disposed on the nut body 11 and bolt 1 respectively, and the inner side of the ring plate 23 is connected to the blade 22.

[0026] Specifically, the first elastic reset element 2 uses a spring as the implementing element. The connecting pad 21 is made of deformable rubber material, and the cross-sectional shape of the ring plate 23 is a regular hexagon.

[0027] When the nut body 11 and bolt 1 are threaded together on both sides of the component, the nut body 11 and bolt 1 cause the connecting washer 21 to fit tightly against the component. At this time, the first elastic reset member 2 is in a contracted state inside the connecting washer 21, so that the operator does not need to apply additional external force to retract the first elastic reset member 2, thus facilitating easy rotation of the nut body 11. Subsequently, the rotating ring plate 23 drives the blade 22 to rotate, and the blade 22 cuts the connecting washer 21, causing one side of the connecting washer 21 to separate from the nut body 11 and bolt 1. At this time, the first elastic reset member 2 is released from the limiting constraint of the connecting washer 21, generating a force that squeezes the nut body 11, bolt 1 and component respectively. This force can ensure that the nut body 11 and bolt 1 maintain a stable connection under external load, effectively preventing loosening or excessive gaps.

[0028] See Figures 1-3 As shown, the synchronization mechanism includes an extension mechanism, a locking mechanism, a positioning mechanism, and a guiding mechanism. The extension mechanism is mounted on the bolt 1 and is used to cooperate with the axial movement of the nut body 11. The locking mechanism is mounted on both the extension mechanism and the nut body 11 and is used to restrict the nut body 11 and the extension mechanism together. The positioning mechanism is mounted on both the extension mechanism and the bolt 1 and is used to assist the extension mechanism in rotating with the bolt 1. The guiding mechanism is mounted on the extension mechanism and is used to assist the extension mechanism in linear movement.

[0029] Specifically, when the synchronization mechanism is in use, the extension mechanism is fitted onto the outside of the bolt 1 through the positioning mechanism. At this time, the extension mechanism can rotate with the bolt 1, and then the extension mechanism is driven to extend. Through the guide mechanism, the extension mechanism can be kept to extend in a straight line. The extension mechanism is restricted to the nut body 11 through the locking mechanism, so that the nut body 11 can rotate with the bolt 1, ensuring that the nut body 11 always rotates synchronously with the bolt 1, preventing the nut body 11 from loosening or shifting during use, and ensuring the stability and tightness of the connection.

[0030] See Figures 1-3 and Figure 5As shown, the extension mechanism includes a connecting tube 24, a connecting tube 25, and a second elastic reset member 26; the connecting tube 24 is sleeved on the outside of the bolt 1; the connecting tube 25 is axially slidably sleeved on the outside of the connecting tube 24; the second elastic reset member 26 is sleeved on the outside of the connecting tube 24, and its two ends are connected to the connecting tube 24 and the connecting tube 25 respectively; the locking mechanism includes a first elastic locking member 27, a second elastic locking member 28, and a mounting groove 29; the first elastic locking member 27 is connected to the connecting tube 25; the second elastic locking member 28 is mated with the first elastic locking member 27 and connected to the nut body 11; the mounting groove 29... A mounting groove 29 is provided on the side of the nut body 11 near the second elastic clip 28 to accommodate the engagement structure of the first elastic clip 27 and the second elastic clip 28; the positioning mechanism includes a rod 210 and a slot 211; the rod 210 is connected to the inner side of the connecting tube 24; the slot 211 is provided on the side of the bolt 1 near the rod 210 and is used to cooperate with the rod 210 for linear movement; the guiding mechanism includes a slider 212 and a groove 213; the slider 212 is connected to the connecting tube 24; the groove 213 is provided on the side of the connecting tube 25 near the slider 212 and is used to cooperate with the slider 212 for linear movement.

[0031] Specifically, the outer diameter of the connecting pipe 24 is adapted to the inner diameter of the connecting pipe 25, the second elastic reset member 26 uses a spring as the implementing element, and the first elastic locking member 27 and the second elastic locking member 28 are both made of deformable metal. The insertion rod 210 matches the rectangular cross-section slot 211, and the slider 212 and the slide groove 213 form a mating relationship.

[0032] After the first elastic reset member 2 releases the limiting constraint of the connecting pad 21, the insertion rod 210 slides into the slot 211. Thanks to the matching structure between the insertion rod 210 and the rectangular cross-section slot 211, the insertion rod 210 can effectively avoid shaking and rotation inside the slot 211. Subsequently, the insertion rod 210 drives the connecting tube 24 to be sleeved on the outside of the bolt 1, pulling the connecting tube 25 to make the slider 212 slide along the slide groove 213. Since the outer diameter of the connecting tube 24 matches the inner diameter of the connecting tube 25, and the slider 212 and the slide groove 213 form a fit, the connecting tube 25 can slide stably along the connecting tube 24. During the movement of the connecting tube 25, the second elastic reset member 26 is stretched and extended, generating an upward pulling force on the connecting tube 24, causing the insertion rod 210 to maintain the docking state with the slot 211.

[0033] Simultaneously, the movement of the connecting tube 25 causes the first elastic clamp 27 to extend into the mounting groove 29, and the inclined surface of the first elastic clamp 27 presses against the inclined surface of the second elastic clamp 28. Based on the deformable metal properties of the first and second elastic clamps 28, the two achieve a snap-fit ​​connection and are confined within the mounting groove 29, thereby fixing the connecting tube 24 and the connecting tube 25 to the outside of the bolt 1. At this time, the connecting tube 24 and the connecting tube 25 can rotate synchronously with the bolt 1 via the insertion rod 210, and drive the nut body 11 to rotate in tandem with the bolt 1. The synchronous rotation of the nut body 11 and the bolt 1 ensures that they maintain a consistent rotation angle and speed during rotation, effectively avoiding uneven tightening force caused by asynchronous rotation, reducing stress concentration at the connection point, ensuring uniform force on the components, and thus preventing misalignment or loosening of the nut body 11 and the bolt 1.

[0034] Working principle: The nut body 11 and bolt 1 are threaded together on both sides of the component. Then, the ring plate 23 is rotated, and the blade 22 cuts the connecting pad 21, causing one side of the connecting pad 21 to separate from the nut body 11 and bolt 1. The first elastic reset member 2 is released from the limiting constraint of the connecting pad 21, generating a force that squeezes the nut body 11, bolt 1 and component respectively. At this time, the insert rod 210 is slidably engaged with the slot 211, and the connecting tube 25 is pulled, so that the inclined surface of the first elastic clamp 27 and the inclined surface of the second elastic clamp 28 are pressed against each other to achieve a locking connection. Then, the connecting tube 24 and the connecting tube 25 are fixed to the outside of the bolt 1, driving the nut body 11 and bolt 1 to rotate together, thereby preventing the nut body 11 and bolt 1 from being misaligned or loose.

[0035] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A nut with an anti-loosening structure, comprising a nut body (11), the nut body (11) being threadedly connected to a bolt (1), characterized in that, The bolt (1) and the nut body (11) are respectively provided with anti-loosening mechanisms to provide elastic fastening force so that the bolt (1) and the nut body (11) maintain stable pressure; The bolt (1) and the nut body (11) are also provided with a synchronization mechanism to restrict the rotational movement of the nut body (11) outside the bolt (1).

2. A nut with an anti-loosening structure according to claim 1, characterized in that, The anti-loosening mechanism includes a first elastic reset element (2), a connecting pad (21), and an unlocking mechanism; The first elastic reset element (2) is sleeved on the outside of the bolt (1). The first elastic reset element (2) is used to increase the elastic fastening force of the nut body (11) and the bolt (1). The connecting pad (21) is disposed on the first elastic reset member (2). The connecting pad (21) is connected to the nut body (11) and the bolt (1) respectively. The connecting pad (21) is used to realize the tightening operation of the first elastic reset member (2). The unlocking mechanism is respectively set on the nut body (11) and the bolt (1). The unlocking mechanism is used to release the limit of the connecting pad (21) on the first elastic reset member (2).

3. A nut with an anti-loosening structure according to claim 2, characterized in that, The unlocking mechanism includes a blade (22) and a ring plate (23); The blade (22) is mounted on the connecting pad (21); The ring plate (23) is rotatably mounted on the nut body (11) and the bolt (1), and the inner side of the ring plate (23) is connected to the blade (22).

4. A nut with an anti-loosening structure according to claim 1, characterized in that, The synchronization mechanism includes an extension mechanism, a positioning mechanism, a positioning mechanism, and a guiding mechanism; An extension mechanism is provided on the bolt (1) and is used to cooperate with the axial movement of the nut body (11); The locking mechanism is provided on the extension mechanism and the nut body (11), and the locking mechanism is used to restrict the nut body (11) and the extension mechanism together; The positioning mechanism is set on the extension mechanism and the bolt (1). The positioning mechanism is used to assist the extension mechanism in rotating with the bolt (1). The guiding mechanism is mounted on the extension mechanism and is used to assist the extension mechanism in linear movement.

5. A nut with an anti-loosening structure according to claim 4, characterized in that, The extension mechanism includes a connecting tube (24), a connecting tube (25), and a second elastic reset member (26); The connecting pipe (24) is sleeved on the outside of the bolt (1); The butt joint (25) can be axially slidably sleeved on the outside of the connecting pipe (24); The second elastic reset member (26) is sleeved on the outside of the connecting pipe (24), and the two ends of the second elastic reset member (26) are connected to the connecting pipe (24) and the connecting pipe (25) respectively.

6. A nut with an anti-loosening structure according to claim 4, characterized in that, The locking mechanism includes a first elastic locking element (27), a second elastic locking element (28), and a mounting slot (29); The first flexible clamp (27) is connected to the connecting pipe (25); The second elastic clip (28) docks with the first elastic clip (27), and the second elastic clip (28) is connected to the nut body (11); The mounting groove (29) is opened on the side of the nut body (11) near the second elastic clip (28). The mounting groove (29) is used to accommodate the engagement structure of the first elastic clip (27) and the second elastic clip (28).

7. A nut with an anti-loosening structure according to claim 4, characterized in that, The positioning mechanism includes a rod (210) and a slot (211); The insertion rod (210) is connected to the inside of the connecting tube (24); The slot (211) is located on the side of the bolt (1) near the insert (210), and the slot (211) is used to cooperate with the insert (210) for linear movement.

8. A nut with an anti-loosening structure according to claim 4, characterized in that, The guiding mechanism includes a slider (212) and a groove (213); The slider (212) is connected to the connecting tube (24); The slide (213) is provided on the side of the connecting pipe (25) near the slider (212), and the slide (213) is used to cooperate with the slider (212) to move linearly.

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