Self-locking nut
By designing a self-locking nut, the hexagonal nut body and locking thread pins are used to increase the friction between the screw and the nut, the problem of easy loosening and reusable and anti-loosening effect is solved.
Patent Information
- Application Number
- CN202422380488.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-29
AI Technical Summary
When the existing nuts adjust the height or distance, they are easy to loosen. The existing anti-retreatment measures are complex and easy to damage, and cannot be reused.
A self-locking nut is designed. Through the cooperation of the hexagon nut body, locking thread pin, locking through-hole pin and locking bolt, the closure of the gap and the deformation of the internal threaded hole are used to increase the friction between the screw and the nut to prevent loosening.
Reusable use of screws and nuts is achieved without damaging the screws. Through the design of structural features, the friction between the nuts and screws is increased, avoiding excessive looseness of the nuts and simple operation.
Smart Images
Figure CN222991900U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nuts, in particular to a self-locking nut. Background Technique
[0002] When using nuts to adjust height or distance, it is necessary to ensure that the nuts will not loosen. Generally, the measures adopted are to use double nuts to lock and prevent the nuts from loosening or to use anti-loosening nuts. However, when using double nuts to lock and prevent loosening, a large mutual force is required between the two nuts, which is likely to cause damage to the screw and the nut. Moreover, this anti-loosening measure is prone to failure and the operation is complex. The anti-loosening principle of using anti-loosening nuts is to increase the friction between the nut and the screw, which is generally divided into steel sheet damping and plastic damping. If the damping is large, it is easy to damage the screw; if the damping is small, the anti-loosening effect cannot be achieved, and such screws and nuts cannot be reused. Content of the Utility Model
[0003] (1) Technical Problems to be Solved
[0004] In view of the deficiencies of the prior art, the utility model provides a self-locking nut, which solves the problems put forward in the above background technique.
[0005] (2) Technical Solutions
[0006] To achieve the above object, the utility model is realized through the following technical solutions: a self-locking nut, including a hexagonal nut body, an internal thread hole is opened in the middle of the hexagonal nut body, a locking thread pin and a locking through-hole pin are arranged below the hexagonal nut body, a gap is arranged in the middle of the locking through-hole pin and the locking thread pin, a fastening bolt passing through both of them is arranged between the locking through-hole pin and the locking thread pin, a triangular buckle is arranged on the outer side of the lower end of the locking thread pin, and a retaining groove plate holding the triangular buckle is connected below the locking through-hole pin.
[0007] Preferably, the material of the self-locking nut is metal iron or steel, so it has high strength, and the self-locking nut is connected to the screw through the internal thread hole.
[0008] Preferably, the wall thickness dimensions of the hexagonal nut body, the locking thread pin and the locking through-hole pin are basically the same, so that the strength of the three when deforming under force is also basically the same. Furthermore, when the locking through-hole pin and the locking thread pin are combined or sprung open, they can drive the hexagonal nut body to deform synchronously.
[0009] Preferably, when the fastening bolt is tightened, the gap is forced to close. When the gap closes, the internal thread hole also deforms and squeezes inward to increase the pressure between the screw and the nut, so as to increase the friction between the screw and the nut and prevent the nut from loosening.
[0010] Preferably, when the locking bolt is loosened, the locking threaded pin and the locking through-hole pin naturally bounce open, so that the internal threaded hole is no longer forced to deform inward. At this time, the pressure generated between the internal threaded hole and the screw rod decreases, resulting in a decrease in the frictional force between the screw rod and the nut. Furthermore, the self-locking nut can be easily rotated on the screw rod.
[0011] Preferably, a profiling groove with the same shape and size as the triangular buckle is provided on the inner side of the retaining groove plate. The triangular buckle is embedded in the profiling groove and buckled together to prevent the locking threaded pin and the locking through-hole pin from bouncing outwards excessively, thus avoiding the nut from being too loose.
[0012] The present utility model provides a self-locking nut, which has the following beneficial effects:
[0013] 1. For this self-locking nut, through the cooperative setting of the hexagonal nut body, the locking threaded pin, the locking through-hole pin and the locking bolt, the self-locking nut has the effect of being reusable without damaging the screw and nut. Through the cooperation of pins with relatively large structural features and a locking bolt with a relatively large diameter, the hexagonal nut body can be easily forced to deform and squeeze the screw rod to increase the frictional force to achieve the purpose of loosening prevention. Since the hexagonal nut body only applies pressure to the screw rod radially and the force application direction is uniform, the threads of both will not be damaged, so it can be reused. At the same time, because the structural features of the pin and the bolt are relatively large, the locking threads are also relatively large and thus are not easily damaged, so it can be reused.
[0014] 2. For this self-locking nut, through the cooperative setting of the triangular buckle and the retaining groove plate, the self-locking nut has the effect of preventing over-loosening. By restricting the excessive outward bouncing of the pins through the triangular buckle and the retaining groove plate, the expansion of the internal threaded hole can be avoided, and further, the excessive clearance between the nut and the screw rod can be avoided to achieve the effect of loosening prevention. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic structural diagram of the first three-dimensional view of the present utility model;
[0016] Figure 2 is a schematic structural diagram of the second three-dimensional view of the present utility model;
[0017] Figure 3 is a schematic structural diagram of the front view of the present utility model;
[0018] Figure 4 is a schematic structural diagram of the cross-sectional view of the present utility model.
[0019] In the figure: 1. Hexagonal nut body; 2. Internal threaded hole; 3. Locking threaded pin; 4. Locking through-hole pin; 5. Gap; 6. Locking bolt; 7. Triangular buckle; 8. Retaining groove plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0021] Please refer to Figures 1 to 4 , the present utility model provides a technical solution: a self-locking nut, including a hexagonal nut body 1, an internal thread hole 2 is opened in the middle of the hexagonal nut body 1. The material of this self-locking nut is metal iron or steel, so it has high strength. This self-locking nut is connected to a screw through the internal thread hole 2. A locking thread pin 3 and a locking through-hole pin 4 are arranged below the hexagonal nut body 1. The wall thickness dimensions of the hexagonal nut body 1, the locking thread pin 3, and the locking through-hole pin 4 are basically the same, so that the strength of the three when deformed by force is also basically the same. Thus, when the locking through-hole pin 4 and the locking thread pin 3 are combined or sprung open, they can drive the hexagonal nut body 1 to deform synchronously. A gap 5 is arranged between the locking through-hole pin 4 and the locking thread pin 3. A confinement bolt 6 passing through the two is arranged between the locking through-hole pin 4 and the locking thread pin 3. When the confinement bolt 6 is tightened, the gap 5 is forced to close. When the gap 5 is closed, the internal thread hole 2 also deforms and presses inward to increase the pressure between the screw and the nut, so that the friction between the screw and the nut increases to prevent the nut from loosening. When the confinement bolt 6 is loosened, the locking thread pin 3 and the locking through-hole pin 4 naturally spring open, so that the internal thread hole 2 no longer receives force and deforms inward. At this time, the pressure generated between the internal thread hole 2 and the screw decreases, so that the friction between the screw and the nut decreases. Thus, the self-locking nut can be easily rotated on the screw. A triangular buckle 7 is arranged on the outer side of the lower end of the locking thread pin 3. A retaining groove plate 8 that holds the triangular buckle 7 is connected below the locking through-hole pin 4. A profiling groove with the same shape and size as the triangular buckle 7 is opened on the inner side of the retaining groove plate 8. The triangular buckle 7 is embedded in the profiling groove and buckled together to prevent the locking thread pin 3 and the locking through-hole pin 4 from springing open excessively to avoid the nut from being too loose.
[0022] When in use, firstly the outer contour of the self-locking nut is processed by wire cutting, then the internal threaded hole 2 is punched in the middle of the hexagonal nut body 1, and the threaded bottom hole is further processed at the pin, and the gap 5 is further cut out by wire cutting to form a locking threaded pin 3 and a locking through-hole pin 4, and the triangular buckle 7 and the retaining groove plate 8 are cut out at the same time, and the threaded bottom hole on the locking threaded pin 3 is further directly tapped to form a threaded hole, and the threaded bottom hole on the locking through-hole pin 4 is further enlarged so that it can penetrate the captive bolt 6, and the self-locking nut is further installed on the screw through the internal threaded hole 2. At this time, the internal threaded hole 2 has the triangular buckle 7 and the retaining groove plate 8. The limit can avoid its expansion, so that the self-locking nut will not be too loose when connected to the screw. When the self-locking nut and the screw need to be locked, it is only necessary to tighten the locking bolt 6. In this process, the locking threaded pin 3 and the locking through-hole pin 4 are closed, and at the same time, the internal threaded hole 2 is also forced to shrink and squeeze the screw from all angles to increase its friction force to achieve the effect of preventing loosening. At this time, the hexagonal nut body 1 only applies radial pressure to the screw and the force is applied in a uniform direction, so as not to damage the threads of both, so it can be reused. At the same time, because the pin and the bolt structural features are relatively large, the locking thread is also relatively large and not easy to be damaged, so it can be reused.
[0023] To summarize, the self-locking nut can easily force the hexagonal nut body 1 to deform and squeeze the screw rod through the pin with relatively large structural features and the locking bolt 6 with relatively large diameter to increase the friction force and achieve the purpose of loosening. Since the hexagonal nut body 1 only applies radial pressure to the screw rod and the force is applied in a uniform direction and will not damage the threads of both, it can be reused. At the same time, since the pin and the bolt have relatively large structural features, the locking thread is also relatively large and not easy to be damaged, so it can be reused. The triangular buckle 7 and the retaining groove plate 8 limit the pin from being excessively ejected outward to avoid the expansion of the internal threaded hole 2, thereby avoiding the gap between the nut and the screw rod being too large to achieve the anti-loosening effect.
[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A self-locking nut, comprising a hexagonal nut body (1), characterized in that: An internal threaded hole (2) is provided in the middle of the hexagonal nut body (1); a locking threaded pin (3) and a locking through-hole pin (4) are provided below the hexagonal nut body (1); a gap (5) is provided between the locking through-hole pin (4) and the locking threaded pin (3); a locking bolt (6) is provided between the locking through-hole pin (4) and the locking threaded pin (3) to pass through the two; a triangular buckle (7) is provided on the outer side surface of the lower end of the locking threaded pin (3); and a retaining groove plate (8) is connected below the locking through-hole pin (4) to hold the triangular buckle (7).
2. The self-locking nut according to claim 1, characterized in that: The self-locking nut is made of metal iron or steel and has high strength. The self-locking nut is connected to the screw rod via an internal threaded hole (2).
3. The self-locking nut according to claim 1, characterized in that: The wall thicknesses of the hexagonal nut body (1), the locking thread pin (3) and the locking through-hole pin (4) are substantially the same, so that the strength of the three forces upon deformation is also substantially the same, and thus the locking through-hole pin (4) and the locking thread pin (3) can both drive the hexagonal nut body (1) to deform synchronously when they are combined or ejected.
4. The self-locking nut according to claim 1, characterized in that: When the locking bolt (6) is tightened, the gap (5) is closed by force. When the gap (5) is closed, the internal threaded hole (2) is also deformed and squeezed inward to increase the pressure between the screw and the nut, so that the friction between the screw and the nut is increased to prevent the nut from loosening.
5. The self-locking nut according to claim 1, characterized in that: When the locking bolt (6) is loosened, the locking thread pin (3) and the locking through hole pin (4) are naturally opened so that the internal thread hole (2) is no longer deformed inwardly by force. At this time, the pressure generated between the internal thread hole (2) and the screw is reduced, so that the friction between the screw and the nut is reduced, thereby allowing the self-locking nut to be easily rotated on the screw.
6. The self-locking nut according to claim 1, characterized in that: The inner side of the retaining groove plate (8) is provided with a profiling groove having the same shape and size as the triangular buckle (7). The triangular buckle (7) is embedded in the profiling groove and buckled together to prevent the locking threaded pin (3) and the locking through hole pin (4) from being excessively ejected outwards, thereby preventing the nut from being too loose.