Anti-thread-slipping double-end bolt

Abstract

The utility model relates to the technical field of bolts, in particular to an anti-thread-slipping double-end bolt which comprises a double-end bolt body, threaded grooves are symmetrically formed in the outer surfaces of the two ends of the double-end bolt body, a nut is installed on each section of threaded groove in a threaded mode, a limiting groove is formed in each nut, and straight grooves are symmetrically formed in the two ends of the double-end bolt body. Threaded sleeves are in threaded connection with the interiors of the two ends of the stud body, square notches which are symmetrically distributed are formed in the exteriors of the lower ends of the threaded sleeves, and clamping blocks which are symmetrically distributed are slidably installed in the lower ends of the threaded sleeves. Through the matching structure of the clamping block and the nut limiting groove, the clamping block is clamped into the limiting groove under the pushing of the threaded ejector rod to form effective mechanical locking, so that the nut loosening phenomenon caused by vibration, impact and the like is prevented, and the connection reliability is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, and in particular to an anti-slip double-ended bolt. Background Technology

[0002] A double-ended bolt is a fastener with external threads at both ends and a smooth, unthreaded section in the middle. It is typically used to achieve a detachable and fixed connection between two connected parts. Its structure allows it to be clamped by screwing in nuts at both ends during assembly. Therefore, it is widely used in mechanical engineering, building structures, bridge engineering, automobile manufacturing, and other fields, and has become an indispensable standard part in many industrial equipment.

[0003] However, in practical applications, traditional double-ended bolts still have certain technical defects. Especially in complex working conditions and high vibration environments, the nut and bolt are prone to loosening due to external vibration, impact loads or temperature changes. This loosening will not only reduce the clamping force of the connection, but may also lead to connection failure, which in turn will cause unstable equipment operation, component damage or even safety accidents.

[0004] Therefore, there is an urgent need to provide a non-slip threaded double-ended bolt. Utility Model Content

[0005] In order to overcome the shortcomings of traditional double-ended bolts, which are prone to loosening in high-vibration environments, leading to reduced connection reliability, potential equipment failure, or even safety accidents, this utility model provides an anti-slip threaded double-ended bolt.

[0006] To address the aforementioned issues, this utility model employs the following technical solution: an anti-slip double-ended bolt, comprising a double-ended bolt body, with symmetrically arranged threaded grooves on the outer surfaces of both ends of the body, each threaded groove having a nut threadedly installed thereon, the nut having a limiting groove inside, the double-ended bolt body having symmetrically arranged slots at both ends, threaded sleeves being threadedly connected to the inner surfaces of both ends of the double-ended bolt body, symmetrically distributed square slots being opened on the outer surface of the lower end of the threaded sleeve, symmetrically distributed locking blocks being slidably installed inside the lower end of the threaded sleeve, a first elastic element being connected between the locking blocks and the threaded sleeve, and a threaded push rod being threadedly connected inside the threaded sleeve.

[0007] More preferably, the outer side of the locking block is provided with a spherical protrusion structure, which matches the limiting groove on the nut.

[0008] More preferably, the lower end of the threaded push rod is designed as a frustum structure, and the side of the locking block that contacts the frustum structure is designed as a matching inclined surface.

[0009] More preferably, the upper end of the threaded push rod is fixedly connected to a symmetrically distributed connecting rod, a telescopic rod is slidably installed on the connecting rod, a second elastic element is connected between the telescopic rod and the connecting rod, the outer surface of the nut is provided with symmetrically distributed grooves, and the lower end of the telescopic rod is provided with a protrusion that matches the groove.

[0010] More preferably, the threaded push rod has a hexagonal countersunk hole at its top end.

[0011] More preferably, the length of the double-ended bolt body is 10mm, and the diameter of the double-ended bolt body is 3mm-5mm.

[0012] Compared with the prior art, the present invention has the following technical effects: 1. Through the cooperation structure of the locking block and the nut limiting groove, the locking block is driven into the limiting groove by the threaded top rod, forming an effective mechanical lock, thereby preventing the nut from loosening due to vibration, impact and other reasons, and significantly improving the reliability of the connection.

[0013] 2. Through the cooperation of connecting rod, telescopic rod, second elastic element, groove and protrusion, the nut is circumferentially locked during installation to prevent the nut from rotating, which further improves the stability and safety of the overall connection structure. During disassembly, the nut can be rotated synchronously, which simplifies the disassembly steps, reduces the difficulty of manual operation, and improves maintenance efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the double-headed bolt body, nut, and telescopic rod of this utility model.

[0016] Figure 3 This is a three-dimensional sectional view of the double-ended bolt body, threaded sleeve, and threaded push rod of this utility model.

[0017] Figure 4 This is an exploded view of the double-ended bolt body, threaded sleeve, and threaded push rod of this utility model.

[0018] Figure 5 This is a three-dimensional sectional view of the nut of this utility model.

[0019] The components in the attached diagram are labeled as follows: 1. Double-ended bolt body, 2. Threaded groove, 3. Nut, 301. Limiting groove, 4. Slotted groove, 5. Threaded sleeve, 6. Square slot, 7. Locking block, 8. First elastic element, 9. Threaded push rod, 10. Connecting rod, 11. Telescopic rod, 12. Second elastic element, 13. Groove, 14. Protrusion, 15. Hexagonal countersunk hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1: Please refer to Figures 1-5 A type of anti-slip double-ended bolt includes a double-ended bolt body 1, which is 10mm long and 3mm-5mm in diameter. The upper and lower outer surfaces of the body have two symmetrically arranged threaded grooves 2, each threaded groove 2 having a nut 3 threadedly installed. The nut 3 has a limiting groove 301 inside for locking with subsequent structures. The upper and lower ends of the double-ended bolt body 1 have two symmetrically arranged slots 4. Threaded sleeves 5 are threadedly connected to the upper and lower ends of the double-ended bolt body 1. The lower end of each threaded sleeve 5 has two symmetrically distributed square slots 6. The lower end of each threaded sleeve 5 has two symmetrically distributed locking blocks 7 slidably installed inside. The locking blocks 7 can move radially within a certain range and can be... The square slot 6 and the slot 4 extend outwards. In addition, the outer side of the locking block 7 is provided with a spherical protrusion structure. The spherical protrusion matches the limiting groove 301 on the nut 3, thereby achieving a locking and fixing. A first elastic element 8 is connected between the locking block 7 and the threaded sleeve 5 to provide an inward restoring force for the locking block 7. The threaded sleeve 5 is internally threaded with a threaded push rod 9. The lower end of the threaded push rod 9 is designed as a frustum structure. The side of the locking block 7 that contacts the frustum structure is designed as a matching inclined surface, so that the locking block 7 can be pushed outwards when the threaded push rod 9 rotates downwards. In addition, the top of the threaded push rod 9 is provided with a hexagonal countersunk hole 15 for use with a corresponding hexagonal wrench or other matching tools. This design allows users to rotate the threaded push rod 9 more conveniently and efficiently.

[0022] In use, first, pass the double-ended bolt body 1 through the parts to be connected, then screw the nuts 3 into both ends of the double-ended bolt body 1 to the appropriate positions. Next, screw the threaded sleeve 5 into the inside of the double-ended bolt body 1, and then screw the threaded push rod 9 into the threaded sleeve 5. As the threaded push rod 9 is screwed into the appropriate position, the frustum structure at its lower end moves downward and pushes the locking block 7 to slide radially outward, compressing the first elastic element 8. When the locking block 7 is fully extended from the square slot 6 and the slot 4, the spherical protrusion structure on it will be embedded in the limiting groove 301 inside the nut 3, thereby forming an axial and circumferential limiting effect on the nut 3, ensuring the stability of the nut 3, effectively preventing the nut 3 from loosening due to vibration or other external forces, improving the stability and reliability of the connection structure, reducing the occurrence of equipment failures, and extending the service life of the equipment.

[0023] Example 2: Based on Example 1, please refer to... Figure 3 and Figure 4 The upper end of the threaded top rod 9 is fixed with two connecting rods 10 that are symmetrically distributed on the left and right. A telescopic rod 11 is slidably installed on the connecting rod 10. A second elastic element 12 is connected between the telescopic rod 11 and the connecting rod 10 to provide elastic force for the telescopic rod 11 so that it can extend and retract freely. The outer surface of the nut 3 is provided with two grooves 13 that are symmetrically distributed on the left and right. The lower end of the telescopic rod 11 is provided with a protrusion 14 that matches the groove 13.

[0024] During use, when the threaded push rod 9 is screwed in counterclockwise to fix the nut 3, as the threaded push rod 9 moves downward, the telescopic rod 11 will slide upward relative to the connecting rod 10 due to the reverse force from the upper end face of the nut 3, and compress the second elastic element 12. At this time, the protrusion 14 on the telescopic rod 11 will be embedded in the groove 13 on the surface of the nut 3, thereby achieving circumferential limiting of the nut 3 and further enhancing its anti-loosening performance. When it is necessary to disassemble the nut 3, simply screw the threaded push rod 9 out clockwise. At this time, the groove 13 will abut against the protrusion 14 to prevent the protrusion 14 from falling out. The protrusion 14 will still be stuck in the groove 13. Therefore, while the threaded push rod 9 is rotating, the nut 3 can be screwed out together through the connecting rod 10 and the telescopic rod 11, thereby simplifying the disassembly steps and improving work efficiency.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A kind of anti-wire double-end bolt, including double-end bolt main body (1), the outer surface of both ends of the main body is provided with thread groove (2) symmetrically, each thread groove (2) is threadedly installed with nut (3), it is characterized by: The nut (3) is internally provided with a limiting slot (301), the stud bolt body (1) is symmetrically provided with a slot (4) at both ends, the stud bolt body (1) is internally threadedly connected with a threaded sleeve (5) at both ends, the threaded sleeve (5) is externally provided with a square notch (6) symmetrically distributed at the lower end, the threaded sleeve (5) is internally slidably connected with a clamping block (7) symmetrically distributed at the lower end, the clamping block (7) and the threaded sleeve (5) are connected with a first elastic member (8), and the threaded sleeve (5) is internally threadedly connected with a threaded ejector rod (9).

2. A non-slip double end bolt according to claim 1, characterized in that: The outer side of the clamping block (7) is provided with a spherical convex structure, and the spherical convex structure is matched with the limiting slot (301) on the nut (3).

3. A non-slip double end bolt according to claim 2, characterized in that: The lower end of the threaded ejector rod (9) is designed as a circular truncated cone structure, and the side of the clamping block (7) in contact with the circular truncated cone structure is designed as a matching inclined surface.

4. A non-slip double end bolt according to claim 3, wherein: The upper end of the threaded ejector rod (9) is fixedly connected with a connecting rod (10) symmetrically distributed, the connecting rod (10) is slidably connected with an extension rod (11), the extension rod (11) and the connecting rod (10) are connected with a second elastic member (12), the outer surface of the nut (3) is provided with a recess (13) symmetrically distributed, and the lower end of the extension rod (11) is provided with a convex block (14) matched with the recess (13).

5. A non-slip double end bolt according to claim 4, wherein: The top end of the threaded ejector rod (9) is provided with a hexagonal counterbore (15).

6. A non-slip double end bolt according to claim 5 wherein: The length of the stud bolt body (1) is 10mm, and the diameter of the stud bolt body (1) is 3mm-5mm.

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