Self-locking bolt
By designing the bolt with a retaining column and a tensioning arc plate structure, the problem of traditional bolts loosening under vibration is solved, achieving efficient self-locking and anti-loosening, and enhancing the stability and safety of the connection.
Patent Information
- Application Number
- CN202520453128.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-15
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-15
AI Technical Summary
Traditional bolts are prone to loosening under vibration or impact, leading to connection failure and posing a safety hazard.
A self-locking bolt was designed by setting a stop post at the end of the threaded rod, and designing a movable port and sliding groove inside it, so that the holding block pushes the tensioning arc plate to expand radially during the tightening process. Combined with the limiting protrusion, protrusion through groove, anti-slip texture and triangular self-locking diagonal pattern of the pad, the anti-loosening performance is enhanced.
It achieves a highly efficient and reliable self-locking anti-loosening function, enhances the stability and safety of bolts in vibration environments, prevents loosening, and improves the stability of the connection.
Smart Images
Figure CN223725106U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of fastener, especially a self-locking bolt. BACKGROUND
[0002] In the field of mechanical connection, especially in application scenarios requiring high safety and stability, bolts play an important role as key fasteners. However, traditional bolts are prone to loosening under conditions of vibration, impact or long-term use, leading to connection failure and possibly causing serious safety accidents. Therefore, developing a bolt with self-locking function has become an important direction to improve connection reliability and safety. SUMMARY
[0003] The utility model provides a self-locking bolt, which has efficient and reliable self-locking anti-loosening function, solving the above problems existing in the use process of the prior art.
[0004] The technical scheme of the utility model is implemented as follows: a self-locking bolt comprises a bolt head and a threaded rod which are integrally formed, a stop post is integrally formed on one end of the threaded rod away from the bolt head, the cross-sectional width of the stop post is smaller than the diameter of the threaded rod, an active port is axially formed in the stop post, the active port penetrates through one end of the stop post away from the bolt head, a plurality of sliding grooves penetrating into the active port are radially formed on the side wall of the stop post, a stop pressing block is axially movably arranged in the active port, a tensioning arc plate is arranged on the side wall of the stop post, a sliding rod is connected to the tensioning arc plate, the sliding rod is slidingly fitted in the sliding groove, one end of the sliding rod away from the tensioning arc plate is linked with the stop pressing block and is used for pushing the tensioning arc plate radially outward when the stop pressing block moves toward the bolt head.
[0005] Preferably, a first inclined surface is formed on one end of the sliding rod away from the tensioning arc plate, and a second inclined surface is arranged on the stop pressing block and matches the first inclined surface.
[0006] Preferably, a clamping port is formed on the lower side of the second inclined surface of the stop pressing block and is used for clamping one end of the sliding rod away from the tensioning arc plate.
[0007] Preferably, a push post is integrally formed on the stop pressing block, the push post penetrates through the active port and is integrally formed with a stop plate.
[0008] Preferably, a limiting protrusion is integrally formed on the stop post at the opening position of the active port, and a protrusion passing groove is formed on the stop pressing block and is used for passing the limiting protrusion.
[0009] Preferably, a plurality of anti-skid lines are arranged on the outer side wall of the tensioning arc plate.
[0010] Preferably, the bolt head is integrally formed with a washer on the side facing the threaded rod, and the washer is provided with a plurality of triangular self-locking diagonal lines on the side facing the threaded rod.
[0011] In summary, the beneficial effects of the present application are:
[0012] 1. The utility model discloses a threaded rod end is provided with the resistance column, and the inside design movable mouth and slip slot, make resistance and hold the pressure block can push the radial expansion of the expansion arc plate in the process of screwing, thereby realize high -efficient, reliable self -locking anti -loose function.
[0013] 2, the design of the bayonet further prevents the back of the resistance and holds the pressure block, ensures that the expansion arc plate always keeps in the inflation state, enhances the anti -loose performance of the bolt.
[0014] 3, the design of the limiting lug and the lug through the groove effectively prevents the resistance and holds the pressure block in the installation and use process accidental drop, increases the stability and security of the system.
[0015] 4, the anti -slip line increases the friction between the expansion arc plate and the inner wall of the threaded hole, further improves the anti -loose effect, ensures the stability of connection.
[0016] 5, the design of the washer and the triangular self -locking diagonal line increases the friction between the bolt head and the connecting piece, further enhances the stability of the whole connection, prevents the bolt from loosening in the vibration environment. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0018] Figure 1 It is the overall structure schematic diagram of the utility model;
[0019] Figure 2 It is the structure explosion schematic diagram of the utility model;
[0020] Figure 3 It is the cross section structure schematic diagram of the utility model;
[0021] Figure 4 It is Figure 3 It is the local structure enlarged schematic diagram of the lower side portion;
[0022] Figure 5 It is Figure 3 It is the structure schematic diagram of the lower side portion screw thread cooperation into the threaded hole.
[0023] In the diagram: 1. Bolt head; 11. Washer plate; 12. Triangular self-locking diagonal pattern; 2. Threaded rod; 3. Abutment; 31. Movable opening; 32. Sliding groove; 33. Limiting protrusion; 41. Holding block; 411. Second inclined surface; 412. Bayonet; 413. Protrusion through groove; 44. Push post; 45. Abutment plate; 51. Tensioning arc plate; 511. Anti-slip texture; 52. Sliding rod; 521. First inclined surface. Detailed Implementation
[0024] The following will refer to the appendix in the embodiments of this utility model. Figures 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. 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.
[0025] Example:
[0026] like Figures 1 to 5 As shown, this utility model discloses a self-locking bolt, comprising an integrally formed bolt head 1 and a threaded rod 2. The threaded rod 2 has an integrally formed abutment 3 at the end away from the bolt head 1. The cross-sectional width of the abutment 3 is smaller than the diameter of the threaded rod 2. An axially oriented movable opening 31 is provided within the abutment 3, extending through the end of the abutment 3 away from the bolt head 1. Furthermore, a plurality of radially oriented sliding joints are provided on the side wall of the abutment 3, penetrating into the movable opening 31. The sliding slot 32 has an axially movable support block 41 inside the movable opening 31. A tensioning arc plate 51 is provided on the side wall of the support column 3, and a sliding rod 52 is connected to the tensioning arc plate 51. The sliding rod 52 slides and engages in the sliding slot 32. In this utility model, the end of the sliding rod 52 away from the tensioning arc plate 51 is linked with the support block 41 and is used to push the tensioning arc plate 51 radially outward when the support block 41 moves toward the bolt head 1.
[0027] Specifically, the sliding rod 52 has a first inclined surface 521 at the end away from the tensioning arc plate 51, while the holding block 41 has a second inclined surface 411 that fits against the first inclined surface 521.
[0028] Furthermore, the supporting block 41 has a slot 412 on the lower side of the second inclined surface 411 for inserting one end of the sliding rod 52 away from the tensioning arc plate 51.
[0029] Among them, the supporting block 41 has an integrally formed push post 44, which penetrates through the movable opening 31 and has an integrally formed a stop plate 45.
[0030] In use, the supporting block 41 is located within the movable opening 31, with its push post 44 penetrating the movable opening 31 and bearing a stop plate 45. The tensioning arc plate 51 is in a contracted state. When the bolt is screwed into the threaded hole, the stop post 3 gradually approaches the bottom of the threaded hole. The stop plate 45 at the lower end of the supporting block 41 first contacts the bottom of the threaded hole and receives an upward thrust as the threaded rod 2 continues to rotate. The push post 44 transmits this thrust to the supporting block 41, causing it to move upward axially. As the supporting block 41 moves upward, its second inclined surface 411 interacts with the first inclined surface 521 of the sliding rod 52, forcing the sliding rod 52 to move radially outward along the sliding groove 32. The outward movement of the sliding rod 52 causes the tensioning arc plate 51 to expand radially, pressing it tightly against the inner wall of the threaded hole, forming an effective self-locking mechanism. Figure 5 As shown, when the sliding rod 52 engages with the latch 412 of the holding block 41, the holding block 41 can no longer move downwards, ensuring that the tensioning arc plate 51 remains in an expanded state and preventing the bolts from loosening. It should be noted that the latch 412 should not be too deep, because when the sliding rod 52 engages with the latch 412 of the holding block 41, the tensioning arc plate 51 will retract to some extent. The depth of the latch 412 should be set such that although the tensioning arc plate 51 retracts to some extent, it will not seriously affect the tensioning effect.
[0031] In this utility model, the abutment 3 has a limiting protrusion 33 integrally formed at the opening position of the movable port 31, such as... Figure 2 As shown, the supporting block 41 has a protrusion through groove 413 for the limiting protrusion 33 to pass through. When the supporting block 41 is installed into the movable opening 31, the protrusion through groove 413 on the supporting block 41 is aligned with the limiting protrusion 33, so that it can be installed into the movable opening 31. After being rotated into the movable opening 31, the supporting block 41 is rotated so that the protrusion through groove 413 is misaligned with the limiting protrusion 33. The limiting protrusion 33 can then limit the supporting block 41, thus preventing the supporting block 41 from coming out of the movable opening 31 before the threaded hole is tightened.
[0032] In this utility model, the outer wall of the tensioning arc plate 51 is provided with a number of anti-slip textures 511. The anti-slip textures 511 increase the friction between the tensioning arc plate 51 and the inner wall of the threaded hole, further improving the anti-loosening effect and ensuring the stability of the connection.
[0033] In this utility model, a pad 11 is integrally formed on the side of the bolt head 1 facing the threaded rod 2. The pad 11 is provided with a plurality of triangular self-locking diagonal lines 12 on the side of the pad 11 facing the threaded rod 2. The design of the pad 11 and the triangular self-locking diagonal lines 12 increases the friction between the bolt head 1 and the connecting parts, further enhancing the stability of the overall connection and preventing the bolt from loosening in a vibration environment.
[0034] Meanwhile, it needs to be pointed out that the terms indicated by the utility model, such as "front", "rear", "vertical", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the utility model.
[0035] The above merely describes the preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A self-locking bolt comprising a bolt head and a threaded shank formed integrally, characterized in that: The threaded rod is integrally formed with an abutting post on the end away from the bolt head, the abutting post has a cross section width smaller than the diameter of the threaded rod, an active opening is axially formed in the abutting post, the active opening penetrates through the end of the abutting post away from the bolt head, a plurality of sliding slots are radially formed in the side wall of the abutting post and penetrate into the active opening, an abutting pressing block is axially movably arranged in the active opening, a tensioning arc plate is arranged on the side wall of the abutting post, a sliding rod is connected to the tensioning arc plate, the sliding rod is slidingly fitted in the sliding slot, the end of the sliding rod away from the tensioning arc plate is linked with the abutting pressing block and is used for pushing the tensioning arc plate radially outward when the abutting pressing block moves towards the end of the bolt head.
2. A self-locking bolt according to claim 1, wherein: The end of the sliding rod away from the tensioning arc plate is formed with a first inclined surface, and the abutting pressing block is provided with a second inclined surface which is fitted with the first inclined surface.
3. A self-locking bolt according to claim 2, wherein: The abutting pressing block is formed with a clamping opening under the second inclined surface, which is used for clamping the end of the sliding rod away from the tensioning arc plate.
4. A self-locking bolt according to claim 1, wherein: The abutting pressing block is integrally formed with a pushing post which penetrates through the active opening and is integrally formed with an abutting plate.
5. A self-locking bolt according to claim 1, wherein: The abutting post is integrally formed with a limiting protrusion at the opening position of the active opening, and the abutting pressing block is formed with a protrusion passing groove through which the limiting protrusion passes.
6. A self-locking bolt according to claim 1, wherein: The outer side wall of the tensioning arc plate is provided with a plurality of anti-skid lines.
7. A self-locking bolt according to claim 1, wherein: The bolt head is integrally formed with a pad on the side towards the threaded rod, and the side of the pad towards the threaded rod is provided with a plurality of triangular self-locking diagonal lines.