Locking nut with limiting structure

Abstract

The utility model discloses a locking nut with limiting structure relates to fastener technical field, the utility model discloses a fixed workpiece is provided with bolt in the inside, the bolt surface is connected with the nut with screw thread, the fixed workpiece one side is provided with anti -moving mechanism, the anti -moving mechanism includes the gasket subassembly of setting in the fixed workpiece one side and the anti -shaking subassembly of setting in the fixed workpiece one side, the utility model discloses the multidirectional meshing cooperation between anti -moving mechanism and fixed workpiece, has realized the stable positioning of connecting bottom structure, and first gasket and second gasket are placed respectively in the top and bottom of fixed workpiece, make its surface fixed first tooth plate accurate embedding fixed workpiece preset anti -shaking recess, in the nut tightening process, the pre -tightening force will be tightly pressed together in fixed workpiece surface gasket subassembly, first tooth plate and the meshing of anti -shaking recess effectively limited gasket subassembly in horizontal direction's displacement.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and in particular relates to a locking nut with a limiting structure. Background Technology

[0002] Lock nuts are fasteners that integrate special structures on the basis of standard nuts to prevent them from loosening spontaneously under vibration, impact or load changes. Their core function is to maintain the preload of bolted connections, ensuring the long-term stability and safety of mechanical connections. They are widely used in fields with extremely high safety requirements, such as vehicles, construction machinery, and aerospace.

[0003] Existing locking nuts still have some problems during use. For example, the connection between bolts and nuts mainly relies on the friction between the threads to achieve self-locking. When subjected to alternating loads or mechanical vibrations for a long time, this friction will gradually weaken, causing the threaded pair to rotate slightly relative to each other, which will cause the nut to loosen. This loosening process not only leads to a decrease in preload, but may also cause connection failure, resulting in serious equipment failure or safety accidents. Common anti-loosening nuts, such as nylon insert nuts and flange nuts, have limited anti-loosening effects.

[0004] To address this issue, we provide a locking nut with a limiting structure. Utility Model Content

[0005] The purpose of this utility model is to provide a locking nut with a limiting structure. By combining the anti-loosening mechanism and the limiting mechanism, the existing locking nuts have limited anti-loosening effect.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a locking nut with a limiting structure, comprising a fixed workpiece, a bolt inside the fixed workpiece, a nut threaded onto the surface of the bolt, an anti-movement mechanism on one side of the fixed workpiece, the anti-movement mechanism comprising a washer assembly and an anti-shaking assembly on one side of the fixed workpiece, and a limiting mechanism on the top of the fixed workpiece, the limiting mechanism comprising a limiting plate on the surface of the nut, a limiting assembly on the top of the fixed workpiece, and an anti-disengagement assembly on the bottom of the limiting plate.

[0008] The present invention is further configured such that the gasket assembly includes a first gasket disposed on the top of the fixed workpiece and a second gasket disposed on the bottom of the fixed workpiece.

[0009] The present invention is further configured such that the anti-sway assembly includes anti-sway grooves formed at the top and bottom of the fixed workpiece, and a first toothed plate inserted inside the anti-sway grooves.

[0010] The present invention is further configured such that the limiting component includes a second toothed plate fixedly connected to the side of the nut, and a third toothed plate meshing with the second toothed plate.

[0011] The present invention is further configured such that a limiting groove is formed on the top of the gasket assembly, and the cross-sectional shape of the limiting groove is trapezoidal.

[0012] The present invention is further configured such that a through slot is provided inside the limiting plate, and the through slot is adapted to be used with the nut.

[0013] The present invention is further configured such that the anti-detachment component includes an anti-detachment insertion hole formed on the top of the gasket assembly, and an anti-detachment rod fixedly connected to the bottom of the limiting plate, wherein the anti-detachment rod and the anti-detachment insertion hole are designed with an interference fit.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model achieves stable positioning of the underlying structure by multi-directional meshing between the anti-sway mechanism and the fixed workpiece. The first and second shims are placed on the top and bottom of the fixed workpiece, respectively, so that the first toothed plate fixed on its surface is accurately embedded in the pre-set anti-sway groove of the fixed workpiece. During the tightening of the nut, the pre-tightening force presses the shim assembly tightly against the surface of the fixed workpiece. At this time, the meshing between the first toothed plate and the anti-sway groove effectively restricts the horizontal displacement of the shim assembly. The mechanical interlocking method effectively prevents the relative sliding between the shim assembly and the fixed workpiece, providing a reliable base plane for the entire locking system and effectively improving the connection rigidity and vibration resistance.

[0016] 2. This utility model achieves dual circumferential and axial constraints on the nut through a composite locking mechanism between the limiting mechanism and the nut. After the nut is installed in place, the limiting plate is sleeved on the outside of the nut through the through slot and pressed down, so that the third toothed plate at its bottom meshes with the second toothed plate on the side of the nut. At the same time, the bottom end of the third toothed plate is embedded in the toothed limiting groove on the top of the first washer to form circumferential locking. Meanwhile, the anti-loosening rod at the bottom of the limiting plate is inserted into the anti-loosening insertion hole of the first washer under pressure, and axial fixation is achieved through interference fit. This effectively restricts the nut in multiple motion dimensions, effectively enhances its anti-loosening ability under vibration or alternating loads, and extends the service life of the connection pair.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a perspective view of a locking nut with a limiting structure.

[0020] Figure 2 This is a schematic diagram showing the separation of the anti-movement mechanism and the limiting mechanism in a locking nut with a limiting structure.

[0021] Figure 3 This is a structural diagram of the anti-shake component in a locking nut with a limiting structure.

[0022] Figure 4 This is a front view of the first washer in a locking nut with a limiting structure.

[0023] Figure 5 This is a diagram illustrating the effect of inserting the anti-disengagement rod into the anti-disengagement hole in a locking nut with a limiting structure.

[0024] In the attached diagram: 1. Fixed workpiece; 2. Bolt; 3. Nut; 4. Anti-movement mechanism; 41. Washer assembly; 411. First washer; 412. Second washer; 42. Anti-sway assembly; 421. Anti-sway groove; 422. First toothed plate; 5. Limiting mechanism; 51. Limiting plate; 52. Limiting assembly; 521. Second toothed plate; 522. Third toothed plate; 53. Anti-detachment assembly; 531. Anti-detachment insertion hole; 532. Anti-detachment rod; 6. Limiting groove; 7. Through slot. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0026] Please see Figures 1-5 This utility model is a locking nut with a limiting structure, including a fixed workpiece 1, a bolt 2 inside the fixed workpiece 1, a nut 3 threadedly connected to the surface of the bolt 2, an anti-movement mechanism 4 on one side of the fixed workpiece 1, the anti-movement mechanism 4 including a washer assembly 41 on one side of the fixed workpiece 1 and an anti-shaking assembly 42 on one side of the fixed workpiece 1, a limiting mechanism 5 on the top of the fixed workpiece 1, the limiting mechanism 5 including a limiting plate 51 on the surface of the nut 3, a limiting assembly 52 on the top of the fixed workpiece 1, and an anti-disengagement assembly 53 on the bottom of the limiting plate 51.

[0027] As a preferred embodiment of the above, the anti-sway mechanism 4 serves to establish a stable reference plane and prevent relative displacement between the gasket assembly 41 and the workpiece, providing a foundation for the subsequent tightening of the nut 3. The operator places the first gasket 411 and the second gasket 412 on the top and bottom of the fixed workpiece 1, respectively, and precisely embeds the first toothed plate 422 fixed on the first gasket 411 and the second gasket 412 into the anti-sway groove 421 opened on the surface of the workpiece. When the bolt 2 and the nut 3 are tightened, the preload force presses the upper and lower gaskets tightly against both sides of the fixed workpiece 1. At this time, the engagement of the first toothed plate 422 with the anti-sway groove 421 effectively restricts any horizontal movement of the gasket assembly 41, thereby ensuring the stability of the entire connection. To ensure the stability of the layer structure, the limiting mechanism 5 directly applies circumferential and axial constraints to the nut 3, preventing it from loosening through multi-level mechanical interlocking. After the nut 3 is tightened, the operator places the limiting plate 51 on the outside of the nut 3 through its through slot 7 and presses it down. During this process, the third toothed plate 522 fixed at the bottom of the limiting plate 51 meshes with the second toothed plate 521 fixed on the side of the nut 3. The bottom end of the third toothed plate 522 is finally embedded in the limiting groove 6 at the top of the first washer 411, forming a circumferential lock. At the same time, the anti-disengagement rod 532 at the bottom of the limiting plate 51 is inserted into the anti-disengagement insertion hole 531 of the first washer 411 under pressure. The interference fit between the two forms an axial lock, thereby firmly locking the nut 3 from multiple directions. Example

[0028] Please see Figures 1-5 Based on Embodiment 1, the gasket assembly 41 includes a first gasket 411 disposed on the top of the fixed workpiece 1 and a second gasket 412 disposed on the bottom of the fixed workpiece 1. The anti-sway assembly 42 includes anti-sway grooves 421 formed on the top and bottom of the fixed workpiece 1, and a first toothed plate 422 inserted into the anti-sway groove 421. There are two sets of first toothed plates 422, which are respectively fixed to the side of the first gasket 411 and the second gasket 412 near the fixed workpiece 1. The limiting assembly 52 includes a second toothed plate 521 fixedly connected to the side of the nut 3, and a first toothed plate 412 that meshes with the second toothed plate 521. The three-tooth plate 522 is fixedly connected to the bottom of the limiting plate 51. The top of the gasket assembly 41 has a limiting groove 6 with a trapezoidal cross-sectional shape. The limiting groove 6 is located on the top of the first gasket 411. The limiting plate 51 has a through slot 7 inside, which is adapted to the nut 3. The anti-detachment assembly 53 includes an anti-detachment insertion hole 531 located on the top of the gasket assembly 41 and an anti-detachment rod 532 fixedly connected to the bottom of the limiting plate 51. The anti-detachment rod 532 and the anti-detachment insertion hole 531 are designed with an interference fit. The anti-detachment insertion hole 531 is located on the top of the first gasket 411.

[0029] As a preferred embodiment of the above: the gasket assembly 41 disperses the pressure on the top and bottom of the fixed workpiece 1, protects the connecting surface, and provides a foundation for the subsequent limiting mechanism 5. The anti-sway assembly 42 inserts the first toothed plates 422 on the first gasket 411 and the second gasket 412 into the corresponding anti-sway grooves 421. After the bolt 2 and nut 3 are installed, the first gasket 411 and the second gasket 412 are pressed against one side of the fixed workpiece 1, providing a limiting foundation for the subsequent limiting mechanism 5. The second toothed plate 521 and the third toothed plate 522, after the nut 3 is installed in place, allow the limiting plate 51 to be fitted downwards onto the surface of the nut 3, and ensure the bottom third tooth... Plate 522 engages downward with the second toothed plate 521, and the locking between the toothed plates prevents it from slipping out. With the setting of the limiting groove 6, after the third toothed plate 522 engages with the second toothed plate 521, it continues to move downward into the limiting groove 6. At this time, the second toothed plate 521, the third toothed plate 522 and the limiting groove 6 form a stable meshing structure. With the help of the anti-shaking component 42, the nut 3 is fastened to the top of the fixed workpiece 1. With the setting of the through slot 7, the limiting plate 51 can be sleeved on the surface of the nut 3. With the setting of the anti-slip component 53, during the downward installation of the limiting plate 51, the anti-slip rod 532 is inserted into the anti-slip hole 531. The interference fit makes it difficult for the limiting plate 51 to easily slip upward.

[0030] The working principle of this utility model is as follows: First, the operator places the first gasket 411 and the second gasket 412 in the gasket assembly 41 on the top and bottom of the fixed workpiece 1, respectively, so that the first toothed plate 422 fixed on the first gasket 411 and the second gasket 412 is aligned and inserted into the anti-sway groove 421 pre-opened on the surface of the fixed workpiece 1. Then, the bolt 2 is passed through the fixed workpiece 1, and the nut 3 is threaded onto the surface of the bolt 2. By tightening the nut 3, a preload is generated, which tightly presses the first gasket 411 and the second gasket 412 onto the top and bottom of the fixed workpiece 1. At this time, the engagement of the first toothed plate 422 with the anti-sway groove 421 effectively restricts the movement of the gasket assembly 41 in the horizontal direction, thereby establishing a stable connection foundation and preventing relative sliding between the gasket assembly 41 and the workpiece.

[0031] Next, the operator places the limiting plate 51 onto the outside of the nut 3 through its internal through slot 7 and presses the limiting plate 51 downward. During this process, the third toothed plate 522 at the bottom of the limiting plate 51 engages with the second toothed plate 521 fixed on the side of the nut 3. At the same time, the bottom end of the third toothed plate 522 is embedded in the limiting groove 6 at the top of the first washer 411, forming a circumferential lock. Meanwhile, the anti-disengagement rod 532 at the bottom of the limiting plate 51 is inserted into the anti-disengagement insertion hole 531 of the first washer 411 under pressure, and axial locking is achieved through interference fit. In this way, the limiting mechanism 5 applies constraints to the nut 3 from multiple directions, effectively preventing the nut 3 from loosening under vibration or load changes.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A locking nut with a limiting structure, comprising a fixed workpiece (1), characterized in that: The fixed workpiece (1) is provided with a bolt (2) inside, and a nut (3) is threaded onto the surface of the bolt (2); An anti-movement mechanism (4) is provided on one side of the fixed workpiece (1). The anti-movement mechanism (4) includes a gasket assembly (41) provided on one side of the fixed workpiece (1) and an anti-shaking assembly (42) provided on one side of the fixed workpiece (1). The top of the fixed workpiece (1) is provided with a limiting mechanism (5), which includes a limiting plate (51) provided on the surface of the nut (3), a limiting component (52) provided on the top of the fixed workpiece (1), and an anti-detachment component (53) provided on the bottom of the limiting plate (51).

2. A locking nut with a limiting structure according to claim 1, characterized in that: The gasket assembly (41) includes a first gasket (411) disposed on the top of the fixed workpiece (1) and a second gasket (412) disposed on the bottom of the fixed workpiece (1).

3. A locking nut with a limiting structure according to claim 1, characterized in that: The anti-sway assembly (42) includes anti-sway grooves (421) formed at the top and bottom of the fixed workpiece (1), and a first toothed plate (422) inserted inside the anti-sway grooves (421).

4. A locking nut with a limiting structure according to claim 1, characterized in that: The limiting component (52) includes a second toothed plate (521) fixedly connected to the side of the nut (3), and a third toothed plate (522) meshing with the second toothed plate (521).

5. A locking nut with a limiting structure according to claim 1, characterized in that: The gasket assembly (41) has a limiting groove (6) on its top, and the cross-sectional shape of the limiting groove (6) is trapezoidal.

6. A locking nut with a limiting structure according to claim 1, characterized in that: The limiting plate (51) has a through slot (7) inside, which is adapted to the nut (3).

7. A locking nut with a limiting structure according to claim 1, characterized in that: The anti-detachment component (53) includes an anti-detachment insertion hole (531) opened on the top of the gasket assembly (41) and an anti-detachment rod (532) fixedly connected to the bottom of the limiting plate (51). The anti-detachment rod (532) and the anti-detachment insertion hole (531) are designed with an interference fit.

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