Lock bolt

Abstract

The utility model discloses a lock bolt which comprises a hexagon nut, one end of the hexagon nut is fixedly connected with a first screw rod, a gasket is movably installed on the first screw rod, the first screw rod is provided with external threads, and the end portion of the end, close to the first screw rod, of the hexagon nut extends in the radial direction to form a first round cap edge. A first anti-loosening groove is formed in the side, facing the screw rod, of the first cap edge, the first anti-loosening groove is perpendicular to the screw rod and is arranged in a radial mode, the gasket is in a circular ring shape, anti-skid lines are arranged on the side, away from the nut, of the gasket and are perpendicular to the circle center of the gasket and are arranged in a radial mode, and a second anti-loosening groove is formed in the side, close to the nut, of the gasket and is perpendicular to the screw rod. The second anti-loosening grooves are arranged in a radial shape perpendicular to the circle center of the gasket, gear type meshing is formed between the anti-loosening grooves, relative rotation is prevented through mechanical interlocking, the friction coefficient of the contact face is increased through the anti-skid lines, transverse displacement is resisted through double resistance, the bolt cannot be loosened when being vibrated or impacted, and the safety of a mechanical structure cannot be affected.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical fastener technology, specifically relating to an anti-loosening bolt. Background Technology

[0002] Anti-loosening bolts are widely used in machinery, vehicle engineering, and building structures. Their core function is to resist loosening failure caused by dynamic loads such as vibration and impact. Traditional anti-loosening technologies mainly achieve this by increasing friction or mechanical interlocking, such as spring washers, double-nut structures, and thread-locking adhesives. However, ordinary washers are prone to displacement under long-term vibration, leading to a decrease in preload. Double-nut or composite washer designs increase installation complexity and have stringent requirements for bolt size matching. Thread-locking adhesives require curing time and are difficult to disassemble, affecting maintenance efficiency. Utility Model Content

[0003] The purpose of this invention is to provide an anti-loosening bolt to solve the problem of bolt loosening and failure caused by dynamic loads such as vibration and impact in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides an anti-loosening bolt, including a hexagonal nut, one end of which is fixedly connected to a screw rod. A washer is movably mounted on the screw rod. The screw rod has an external thread. A circular cap edge extends radially from the end of the hexagonal nut near the screw rod. An anti-loosening groove is provided on the side of the cap edge facing the screw rod. The anti-loosening groove is arranged radially perpendicular to the screw rod. An anti-loosening groove is provided on the side of the washer near the hexagonal nut. The anti-loosening groove is arranged radially perpendicular to the center of the washer. The anti-loosening groove matches the anti-loosening groove.

[0006] In a further technical solution, the gasket is annular, the diameter of the central hole of the gasket is larger than the diameter of the screw, and the diameter of the outer edge of the gasket is the same as the diameter of the outer edge of the cap.

[0007] In a further technical solution, the side of the gasket away from the hexagonal nut is provided with anti-slip texture, and the anti-slip texture is arranged radially perpendicular to the center of the gasket.

[0008] A further technical solution also includes a hexagonal nut, the center of which is hollowed out and has an internal thread, which matches an external thread on the screw.

[0009] In a further technical solution, a circular cap edge 2 extends radially from one end of the hexagonal nut, and an anti-loosening groove 3 is provided on the outer side of the cap edge, the anti-loosening groove 3 matching the anti-loosening groove 2.

[0010] A further technical solution also includes a tapered bolt, which includes a tapered nut. The small end of the tapered nut is fixedly connected to a screw rod two. The side of the tapered nut facing the screw rod two is provided with an anti-loosening groove four, which is arranged radially perpendicular to the center of the tapered nut.

[0011] In a further technical solution, the tapered bolt is movably fitted with a tapered washer, and both sides of the tapered washer are provided with anti-loosening grooves, which are arranged radially perpendicular to the center of the tapered nut.

[0012] In a further technical solution, a hexagonal groove is provided at the center of the end of the tapered nut away from the screw.

[0013] Beneficial effects:

[0014] This invention uses the anti-loosening groove of the cap edge and the gasket to form a gear-like engagement, and mechanical interlocking to prevent relative rotation. The anti-slip texture increases the friction coefficient of the contact surface, and the double resistance resists lateral displacement, so that the bolt will not loosen when subjected to vibration or impact, and will not affect the safety of the mechanical structure. Attached Figure Description

[0015] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0016] Figure 1 A hexagonal bolt structure diagram of an anti-loosening bolt provided in Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of a hexagonal bolt with washer structure for an anti-loosening bolt provided in Embodiment 1 of this utility model;

[0018] Figure 3 This is a schematic diagram of a washer structure for an anti-loosening bolt provided in Embodiment 1 of this utility model;

[0019] Figure 4 This is a schematic diagram of a hexagonal nut structure for an anti-loosening bolt provided in Embodiment 2 of this utility model;

[0020] Figure 5 This is a schematic diagram of a hexagonal nut with washer for an anti-loosening bolt, provided in Embodiment 2 of this utility model;

[0021] Figure 6 This is a schematic diagram of a tapered bolt structure for an anti-loosening bolt provided in Embodiment 3 of this utility model;

[0022] Figure 7 This is a schematic diagram of a tapered bolt with a tapered washer for an anti-loosening bolt, provided in Embodiment 3 of this utility model;

[0023] Figure 8This is a schematic diagram of a tapered washer structure for an anti-loosening bolt provided in Embodiment 3 of this utility model.

[0024] in:

[0025] 1. Hexagonal nut; 2. Screw 1; 3. Washer; 4. Hexagonal nut; 5. Tapered bolt; 11. Cap edge 1; 21. External thread; 31. Anti-loosening groove 2; 32. Anti-slip texture; 41. Internal thread; 42. Cap edge 2; 51. Tapered nut; 52. Screw 2; 53. Tapered washer; 111. Anti-loosening groove 1; 421. Anti-loosening groove 3; 511. Anti-loosening groove 4; 512. Hexagonal groove; 521. Anti-loosening groove 5. Detailed Implementation

[0026] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example 1:

[0028] like Figures 1 to 3 As shown, this utility model embodiment provides an anti-loosening bolt, including a hexagonal nut 1, one end of which is fixedly connected to a screw rod 2. A washer 3 is movably mounted on the screw rod 2. The screw rod 2 is provided with an external thread 21. A circular cap edge 11 extends radially from the end of the hexagonal nut 1 near the screw rod 2. An anti-loosening groove 111 is provided on the side of the cap edge 11 facing the screw rod. The anti-loosening groove 111 is arranged radially perpendicular to the screw rod. An anti-loosening groove 31 is provided on the side of the washer 3 near the hexagonal nut 1. The anti-loosening groove 31 is arranged radially perpendicular to the center of the washer 3. The anti-loosening groove 31 matches the anti-loosening groove 111.

[0029] This embodiment of the utility model integrates the hexagonal nut 1 with the screw 2 with external threads 21, and enhances the overall structural strength of the bolt by combining it with a movable washer 3 and a radially extending circular cap edge 11. The cap edge 11 increases the contact area with the contact surface, improving the anti-loosening performance. The radial anti-loosening groove 111, which is set perpendicular to the center of the screw, generates radial engagement resistance when tightening, forming a mechanical interlocking effect, effectively resisting the reverse rotation of the nut caused by vibration or impact. The anti-loosening groove 31 and the anti-loosening groove 111 are set with the same tooth groove, so that the anti-loosening groove 31 and the anti-loosening groove 111 are perfectly engaged, preventing slippage during engagement and affecting the anti-loosening effect.

[0030] In one feasible implementation scheme, such as Figure 3 As shown, the gasket 3 is annular. The diameter of the central hole of the gasket 3 is larger than the diameter of the screw 2, and the diameter of the outer edge of the gasket 3 is the same as the diameter of the outer edge of the cap 11. By designing the diameter of the central hole of the gasket 3 to be larger than the diameter of the screw 2, it is easier for the screw 2 to pass through the gasket 3. The fact that the outer diameter of the gasket 3 is the same as the outer edge diameter of the cap 11 prevents the gasket 3 from deforming due to different forces, thus affecting the performance.

[0031] In one feasible implementation scheme, such as Figure 3 As shown, the side of the gasket 3 away from the hexagonal nut 1 is provided with anti-slip texture 32, which is arranged radially perpendicular to the center of the gasket 3. By providing radial anti-slip texture 32 on one side of the gasket 3, the friction with the contacting object is increased.

[0032] Example 2:

[0033] like Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that it also includes a hexagonal nut 4. The hexagonal nut 4 has a hollow center and an internal thread 41 at its center, which matches the external thread 21 of the screw 2. By making the center of the hexagonal nut 4 hollow and having an internal thread 41, it can be used with the screw of the hexagonal bolt to further enhance the anti-loosening effect.

[0034] In one feasible implementation scheme, such as Figure 4 and Figure 5 As shown, a circular cap edge 42 extends radially from one end of the hexagonal nut 4, and an anti-loosening groove 421 is provided on the outer side of the cap edge. The anti-loosening groove 421 matches the anti-loosening groove 31 of the washer 3. By matching the cap edge 42 of the hexagonal nut 4 with the washer 3, the adaptability of the washer 3 is increased, and the anti-loosening performance of the hexagonal nut 4 is improved during use.

[0035] Example 3:

[0036] like Figure 6 As shown, this embodiment differs from other embodiments in that it also includes a tapered bolt 5. The tapered bolt 5 includes a tapered nut 51, the small end of which is fixedly connected to a second threaded rod 52. The tapered nut 51 has an anti-loosening groove 511 on the side facing the second threaded rod 52, and the anti-loosening groove 511 is arranged radially perpendicular to the center of the tapered nut 51. By making the bolt tapered, it is suitable for countersunk hole installation, increasing the versatility of anti-loosening bolts and adapting to more application needs.

[0037] In one feasible implementation scheme, such as Figure 7 and Figure 8As shown, the tapered bolt 5 is movably mounted with a tapered washer 53. Both sides of the tapered washer 53 are provided with anti-loosening grooves 521, which are arranged radially perpendicular to the center of the tapered nut 51. By providing anti-loosening grooves 521 on the tapered washer 53, which match the anti-loosening grooves 511 on the tapered bolt 5, the anti-loosening grooves 521 and 511 engage during use. The anti-loosening groove 521 on the other side increases the contact area with the object, thereby increasing the anti-loosening performance of the tapered bolt 5.

[0038] In one feasible implementation scheme, such as Figure 6 As shown, a hexagonal groove 512 is provided at the center of the end of the tapered nut 51 away from the screw 52. By providing the hexagonal groove 512 on the tapered nut 51, it is compatible with standard internal hex wrenches, saving installation space and allowing for use in some compact installation spaces.

[0039] The anti-loosening bolt provided in this embodiment is manufactured as an integrally formed hexagonal bolt. The hexagonal nut 1 extends radially from the end near the screw rod 2, forming a circular cap edge 11 to increase the contact area with the contact surface. An external thread 21 is machined on the surface of the screw rod 2. Radial anti-loosening grooves 111 are machined on the end face of the circular cap edge 11 near the screw rod 2, with the groove shape perpendicular to the screw axis to enhance engagement resistance. A circular washer 3 is manufactured, with a central hole slightly larger than the diameter of the screw rod 2, allowing the washer 3 to deflect slightly on the screw rod 2. Radial anti-slip textures 32 are machined on the side of the washer 3 away from the hexagonal nut 1 to increase friction with the contact surface. A second radial anti-loosening groove 31 matching the anti-loosening groove of the cap edge 11 is machined on the side of the washer 3 near the hexagonal nut 1, forming an engagement structure. The washer 3 is then fitted onto the screw rod 2, allowing it to slide axially along the screw rod 2 and compensating for the assembly angle. To address the deviation, a hexagonal nut 4 is manufactured, with its internal thread 41 matching the external thread 21 of the screw. A radially extending circular cap edge 42 is machined at one end of the hexagonal nut 4, and an anti-loosening groove 421 is designed on its end face. This groove forms a multi-stage engagement with the anti-loosening groove 31 of the washer 3. The washer 3 is then fitted onto the screw 2, with the anti-loosening groove 31 facing the nut, for direct tightening of the application area. Alternatively, it can pass through the application area and then be inserted into another washer 3, with the anti-loosening groove of the washer 3 facing the hexagonal nut 4. The anti-loosening groove 31 of the washer 3 engages sequentially with the anti-loosening groove 111 of the hexagonal nut 1 or the anti-loosening groove 421 of the hexagonal nut 4, forming a stepped anti-loosening structure. By engaging with the anti-loosening groove on the washer 3, relative rotation is prevented when the bolt is vibrated. The anti-slip texture 32 on the other side of the washer 3 increases the contact area, further preventing the bolt from loosening along with the washer 3.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An anti-loosening bolt, characterized in that: The device includes a hexagonal nut (1), one end of which is fixedly connected to a screw rod (2), and a washer (3) is movably mounted on the screw rod (2). The screw rod (2) is provided with an external thread (21). A circular cap edge (11) extends radially from the end of the hexagonal nut (1) near the screw rod (2). An anti-loosening groove (111) is provided on the side of the cap edge (111) facing the screw rod (2). The anti-loosening groove (111) is arranged radially perpendicular to the screw rod. An anti-loosening groove (31) is provided on the side of the washer (3) near the hexagonal nut (1). The anti-loosening groove (31) is arranged radially perpendicular to the center of the washer (3). The anti-loosening groove (31) matches the anti-loosening groove (111).

2. The anti-loosening bolt according to claim 1, characterized in that: The gasket (3) is annular, the diameter of the central hole of the gasket (3) is larger than the diameter of the screw (2), and the outer edge diameter of the gasket (3) is the same as the outer edge diameter of the cap (11).

3. The anti-loosening bolt according to claim 2, characterized in that: The gasket (3) has anti-slip texture (32) on the side away from the hexagonal nut (1), and the anti-slip texture (32) is arranged radially perpendicular to the center of the gasket (3).

4. The anti-loosening bolt according to claim 1, characterized in that: It also includes a hexagonal nut (4), which has a hollow center and an internal thread (41) at its center, which matches the external thread (21) of the screw (2).

5. The anti-loosening bolt according to claim 4, characterized in that: The hexagonal nut (4) has a circular cap edge (42) extending radially from one end. An anti-loosening groove (421) is provided on the outer side of the cap edge, and the anti-loosening groove (421) matches the anti-loosening groove (31).

6. The anti-loosening bolt according to claim 1, characterized in that: It also includes a tapered bolt (5), which includes a tapered nut (51). The small end of the tapered nut (51) is fixedly connected to a screw rod (52). The tapered nut (51) facing the screw rod (52) is provided with an anti-loosening groove (511), which is arranged radially perpendicular to the center of the tapered nut (51).

7. The anti-loosening bolt according to claim 6, characterized in that: The tapered bolt (5) is movably mounted with a tapered washer (53), and both sides of the tapered washer (53) are provided with anti-loosening grooves (521), which are arranged radially perpendicular to the center of the tapered nut (51).

8. The anti-loosening bolt according to claim 6, characterized in that: The conical nut (51) has a hexagonal groove (512) at the center of the end away from the screw (52).

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