Self-locking bolt

Abstract

The utility model discloses a self-locking bolt, and relates to the technical field of self-locking bolts, the self-locking bolt comprises a bolt body, a nut is sleeved outside the bolt body, a screw rod is arranged at the bottom end of the bolt body, a circular ring groove is arranged on the screw rod, a fixing assembly is sleeved outside the screw rod, and the fixing assembly comprises a fixing sleeve, a fixing semi-ring, a spring and a pulling plate. The fixing semi-ring is arranged on the surface of the hole in the fixing sleeve, the spring is arranged on the back of the fixing semi-ring, the pulling plate is fixedly connected with the fixing semi-ring, and the pushing block is arranged at the bottom end of the fixing sleeve and fixedly connected with the pulling plate. The fixing sleeve is screwed on the screw rod in a sleeved mode, then the fixing semi-ring is clamped into the circular ring groove through cooperation of the push block, the pull plate and the spring, and therefore the bolt body and the nut are prevented from loosening and falling off due to special conditions such as vibration, and meanwhile the surfaces of the bolt body, the nut and the threads of the inner walls of the holes of the fixing sleeve are coated with waterproof paint. Threads are prevented from rusting under the humid condition, and the service life of the bolt is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of self-locking bolts, and specifically to a self-locking bolt. Background Art

[0002] The self-locking bolt is a kind of bolt, belonging to the strengthened bolt, and is often applied to equipment with strong vibration force to prevent the bolt itself from loosening due to vibration, thus affecting the use of the equipment. A locking bolt with a self-locking function recorded in the patent with the patent announcement number CN220337252U effectively prevents the nut from loosening by setting a self-locking piece at the lower end of the nut. At the same time, by setting a rotating component, a movable block, a clamping block and a self-locking block inside the bolt, the movable block is driven by rotating the rotating component, the clamping block is then driven by the movable block, and finally the clamping block drives the self-locking block to move outwards, thereby achieving the self-locking effect, effectively preventing the bolt and the nut from loosening and falling off under conditions such as vibration. However, this locking bolt is not easy to disassemble, which is inconvenient for the subsequent disassembly and maintenance operations of the equipment.

[0003] Based on this, a self-locking bolt is now provided to eliminate the drawbacks of the existing device. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a self-locking bolt to solve the problems in the background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A self-locking bolt includes a bolt body, a nut is sleeved outside the bolt body, a screw rod is further provided at the bottom end of the bolt body, and a fixing component is sleeved outside the screw rod.

[0007] On the basis of the above technical solutions, the utility model further provides the following optional technical solutions:

[0008] In an optional solution: a circular ring groove is provided on the screw rod.

[0009] In an optional solution: the fixing component includes a fixing sleeve, a fixing semi-ring, a spring, a pull plate and a push block. The fixing semi-ring is provided on the inner surface of the fixing sleeve, the spring is provided on the back of the fixing semi-ring, the pull plate passes through the bottom end of the fixing sleeve and is fixedly connected with the fixing semi-ring, the push block is provided at the bottom end of the fixing sleeve, and the push block is fixedly connected with the pull plate.

[0010] In an optional solution: an opening is provided in the middle of the fixing sleeve, and the size of the opening is the same as that of the bolt body.

[0011] In an alternative embodiment: A part of the inner wall of the opening of the fixed sleeve is provided with threads, and the threads on the inner wall of the opening of the fixed sleeve match the threads on the outer wall of the bolt body.

[0012] In an alternative embodiment: There are two fixed half-rings, and the arcs of the two fixed half-rings match the circular ring grooves on the screw rod.

[0013] In an alternative embodiment: A rubber sleeve is provided on opposite sides of the two fixed half-rings.

[0014] In an alternative embodiment: The surfaces of the bolt body, the nut, and the threaded part on the inner wall of the opening of the fixed sleeve are all coated with waterproof paint.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] By providing a fixing component, the present utility model can be installed at the bottom of the bolt body after the bolt body and the nut are installed. Through the cooperation of the threads in the opening, the fixed half-rings, and the circular ring grooves on the screw rod, the self-locking effect of the bolt can be achieved, effectively preventing the bolt body and the nut from loosening and falling off under vibrations and other conditions.

[0017] By coating the threads of the bolt body, the nut, and the inner wall of the opening of the fixed sleeve with waterproof paint, the present utility model effectively avoids the situation of thread rusting, achieving the effects of waterproofing and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model.

[0019] Figure 2 is a schematic structural diagram of the screw rod of the present utility model.

[0020] Figure 3 is a schematic cross-sectional structural diagram of a fixed sleeve of the present utility model.

[0021] Annotation of reference numerals: 100 bolt body, 101 nut, 200 fixing component, 201 fixed sleeve, 202 fixed half-ring, 203 spring, 204 pull plate, 205 push block, 300 screw rod, 301 circular ring groove, 302 rubber sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] In one embodiment, as Figure 1 - Figure 2As shown in the figure, a self-locking bolt includes a bolt body 100, a nut 101 is sleeved outside the bolt body 100, a screw rod 300 is further provided at the bottom end of the bolt body 100, and a fixing component 200 is also sleeved outside the screw rod 300;

[0024] When in use, by inserting the bolt body 100 into a specified position of a component to be fixed, then rotating the nut 101 upward from the bottom end of the bolt body 100 until the nut 101 completely fixes the bolt body 100, and then sleeving and rotating the fixing component 200 on the screw rod 300 at the bottom end of the bolt body 100, the self-locking fixation of the bolt body 100 is completed.

[0025] In one embodiment, as Figure 2 shown, a circular ring groove 301 is provided on the screw rod 300;

[0026] When in use, by sleeving and rotating the fixing component 200 on the screw rod 300, the fixing component 200 can be fixed on the screw rod 300 through the circular ring groove 301, thereby achieving the self-locking effect of the bolt body 100 and effectively preventing the bolt body 100 and the nut 101 from loosening and falling off.

[0027] In one embodiment, as Figure 3 shown, the fixing component 200 includes a fixing sleeve 201, a fixing semi-ring 202, a spring 203, a pull plate 204 and a push block 205. The fixing semi-ring 202 is provided on the inner surface of the fixing sleeve 201. The spring 203 is provided on the back of the fixing semi-ring 202. The pull plate 204 passes through the bottom end of the fixing sleeve 201 and is fixedly connected to the fixing semi-ring 202. The push block 205 is provided at the bottom end of the fixing sleeve 201, and the push block 205 is fixedly connected to the pull plate 204;

[0028] When in use, by pushing the push block 205 on the bottom surface of the fixing sleeve 201, the push block 205 can drive the pull plate 204 to move inward, causing the pull plate 204 to push the spring 203 to compress inward, so that the fixing semi-ring 202 moves inward. When the fixing semi-ring 202 completely enters the inner wall, the fixing sleeve 201 can be sleeved and rotated on the screw rod 300 or removed from the screw rod 300. When the fixing sleeve 201 is sleeved and rotated on the screw rod 300, the loosening and falling off of the bolt body 100 caused by vibration can be avoided. At the same time, the upper surface area of the fixing sleeve 201 is larger than that of the nut 101, so when the nut 101 loosens due to vibration, the falling off of the nut 101 can also be prevented.

[0029] In one embodiment, as Figure 1 and Figure 3 shown, an opening is provided in the middle of the fixing sleeve 201, and the size of the opening is the same as that of the bolt body 100;

[0030] During use, the opening size is exactly the same as that of the bolt body 100, which can ensure that the fixing sleeve 201 can just be screwed onto the screw rod 300.

[0031] In one embodiment, as Figure 3 shown, a part of the inner wall of the opening of the fixing sleeve 201 is provided with threads, and the threads on the inner wall of the opening of the fixing sleeve 201 match the threads on the outer wall of the bolt body 100;

[0032] During use, the length of the fixing sleeve 201 is greater than that of the screw rod 300. When the fixing sleeve 201 is sleeved on the screw rod 300, a part of the fixing sleeve 201 will extend beyond the bolt body 100, and the inner wall of the opening of the extended part of the fixing sleeve 201 is provided with threads that are consistent with the outer wall of the bolt body 100, so that the fixing sleeve 201 can be fixed on the bolt body 100 again through the threads, and the cooperation with the screw rod 300 better realizes the fixing of the fixing sleeve 201, and at the same time makes the self-locking effect of the bolt body 100 better.

[0033] In one embodiment, as Figure 2 and Figure 3 shown, there are two fixing half-rings 202, and the arcs of the two fixing half-rings 202 match the circular ring grooves 301 on the screw rod 300;

[0034] During use, when the fixing sleeve 201 is screwed onto the screw rod 300, the two fixing half-rings 202 on the inner wall of the opening of the fixing sleeve 201 will pop out under the action of the spring 203 and then snap into the circular ring grooves 301 on the screw rod 300. The arc of the fixing half-ring 202 matches the circular ring grooves 301 on the screw rod 300, which can make the fixing sleeve 201 better fixed on the screw rod 300.

[0035] In one embodiment, as Figure 3 shown, a rubber sleeve 302 is provided on the opposite sides of the two fixing half-rings 202;

[0036] During use, since the fixing half-ring 202 will inevitably touch the screw rod 300 during the process of sleeving and removing the fixing sleeve 201, and a rubber sleeve 302 is sleeved on the opposite sides of the fixing half-ring 202, the collision friction between the fixing half-ring 202 and the screw rod 300 can be reduced, thereby preventing damage to the device and affecting the service life of the device.

[0037] In one embodiment, as Figure 1 and Figure 3 shown, the surfaces of the bolt body 100, the nut 101, and the inner threaded part of the opening of the fixing sleeve 201 are all coated with waterproof paint;

[0038] During use, by applying waterproof paint to the surfaces of the threaded holes in the bolt body 100, nut 101, and fixing sleeve 201, the acceleration of rusting of the threads in various humid conditions can be avoided, thereby extending the service life of the device and also improving the waterproof property of the locking bolt.

[0039] The working principle of the present utility model is as follows: During use, the bolt body 100 is inserted into the designated position of the device that needs to be fixed by the bolt body 100, and then the nut 101 is rotated upward from the bottom end of the bolt body 100 until the nut 101 completely fixes the bolt body 100. Then, the push block 205 on the bottom surface of the fixing sleeve 201 is pushed, so that the movement of the push block 205 drives the pull plate 204 to move inward. Then, the inward movement of the pull plate 204 drives the fixed half-ring 202 to compress the spring 203 inward, so that the fixed half-ring 202 enters the inner wall of the opening. When the fixed half-ring 202 completely enters the inner wall of the opening, the opening on the fixing sleeve 201 is aligned with the screw rod 300 and sleeved. When the top end of the fixing sleeve 201 reaches the bolt body 100, the fixing sleeve 201 is rotated until the screw rod 300 reaches the bottom end of the fixing sleeve 201. Then, the push block 205 is released, so that the fixed half-ring 202 is snapped into the circular ring groove 301 under the action of the spring 203, thereby completing the installation of the device. When it is necessary to disassemble the device for maintenance later, similarly, the push block 205 at the bottom end of the fixing sleeve 201 is pushed, so that the push block 205 drives the pull plate 204, which in turn drives the fixed half-ring 202 to compress the spring 203 inward. After the push block 205 is pushed to the bottom, first rotate the fixing sleeve 201 to rotate the fixing sleeve 201 off the bolt body 100, and then remove it from the screw rod 300. Finally, the nut 101 is also rotated off the bolt body 100 to complete the disassembly of the bolt.

[0040] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A self-locking bolt, comprising a bolt body (100), characterized in that: The bolt body (100) is provided with a nut (101) on its outer sleeve, the bottom end of the bolt body (100) is also provided with a screw rod (300), and the screw rod (300) is also provided with a fixing assembly (200) on its outer sleeve; The screw rod (300) is provided with a circular groove (301); The fixing assembly (200) comprises a fixing sleeve (201), a fixing half ring (202), a spring (203), a pull plate (204) and a push block (205); the fixing half ring (202) is arranged in the fixing sleeve (201); the spring (203) is arranged on the back of the fixing half ring (202); the pull plate (204) passes through the bottom end of the fixing sleeve (201) and is fixedly connected to the fixing half ring (202); the push block (205) is arranged at the bottom end of the fixing sleeve (201); and the push block (205) is fixedly connected to the pull plate (204).

2. A self-locking bolt according to claim 1, characterized in that: An opening is provided in the middle of the fixing sleeve (201), and the size of the opening is consistent with the size of the bolt body (100).

3. A self-locking bolt according to claim 1, characterized in that: A portion of threads is provided on the inner wall of the opening of the fixing sleeve (201), and the threads on the inner wall of the opening of the fixing sleeve (201) match the threads on the outer wall of the bolt body (100).

4. A self-locking bolt according to claim 1, characterized in that: The fixing half ring (202) is provided with two pieces, and the arc shapes of the two fixing half rings (202) match the annular groove (301) on the screw rod (300).

5. A self-locking bolt according to claim 1, characterized in that: A rubber sleeve (302) is provided on opposite sides of the two fixing half rings (202).

6. A self-locking bolt according to claim 1, characterized in that: The surfaces of the bolt body (100), the nut (101) and the threaded parts of the fixing sleeve (201) are all coated with waterproof coating.

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