Self-locking nut
By designing milled thread grooves and a wedge-shaped block self-locking mechanism inside the nut, combined with a sealing structure, the loosening problem of traditional nuts under vibration and high load conditions is solved, achieving self-locking and anti-loosening effects, and improving the stability and protective performance of the nut.
Patent Information
- Application Number
- CN202520404783.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-10
AI Technical Summary
Traditional nuts are prone to loosening under vibration or high load conditions, leading to equipment failure and safety accidents.
A self-locking nut was designed, which adopts an internally milled threaded groove and a self-locking mechanism, including a fixed base plate, a wedge groove and a wedge block. The wedge block is inclined to increase the friction force, and dust is prevented from entering through a sealing ring and a sealing cap, thereby improving the friction force and the tightness.
It achieves self-locking function under vibration and high load conditions, improves the stability and anti-loosening effect of the nut, and avoids equipment failure and safety accidents.
Smart Images
Figure CN223894722U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nut technical field, concretely relates to a self locking nut. BACKGROUND
[0002] The nut is also called as the screw cap, is a fixed tool, the center has the hole, the hole's inside has the thread, often with the screw of the size is combined to use, to fix the relevant joint part, the nut and the screw or the screw are screwed together to be used to start the fastening effect's spare part, all production manufacture machinery must use a kind of element according to the different material, divide into carbon steel, stainless steel, nonferrous metal etc. several big types, nut is mostly hexagonal, secondly is square.
[0003] The common nut in the market mainly has ordinary nut, spring washer nut and nylon insert nut etc., these nuts show different performance characteristics under different application scenarios, but the anti-loose effect is not good generally, especially in the vibration environment or high load condition, the traditional nut is prone to looseness, leading to equipment failure and even safety accidents.
[0004] Therefore, it is necessary to invent a self locking nut to solve the above problems. CONTENT OF UTILITY MODEL
[0005] The utility model aims at providing a self locking nut to solve the problem that the traditional nut is prone to looseness in the vibration environment or high load condition, leading to equipment failure and even safety accidents.
[0006] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a self locking nut, including nut main part, the inside of nut main part is milled with thread groove, the lower end of nut main part is provided with self locking mechanism, self locking mechanism includes fixed bottom plate, wedge-shaped slot and wedge-shaped block, the lower end of nut main part is welded with fixed bottom plate, the lower surface of fixed bottom plate is milled with multiple groups of wedge-shaped slots, and the wedge-shaped block is between two groups of wedge-shaped slots, and the wedge-shaped block is inclined.
[0007] By adopting the above technical scheme, when the nut is rotated clockwise into the surface of the screw, the nut rotates along the inclined and rotating direction of the wedge-shaped block, the wedge-shaped block expands radially outward under the pressure of the nut after contacting with the object, the wedge-shaped block increases the friction between the nut and the object, and when the nut rotates counterclockwise, the inclined and rotating direction of the wedge-shaped block is opposite, so that the nut is difficult to rotate, thereby realizing the self locking function.
[0008] Optionally, the center of the fixed bottom plate is milled with an annular sealing groove, and the inner fixed wall of the sealing groove is fixedly connected with a positioning ring.
[0009] Optionally, a sealing ring is clamped in the sealing groove, and a positioning groove is formed in the upper surface of the sealing ring.
[0010] By adopting the technical scheme, the sealing ring is clamped in the sealing groove, the lower end of the nut body is sealed, dust is prevented from entering the nut from the lower side, pollution to the inside of the nut is avoided, the cleanliness of the inside of the nut is improved, the friction between the nut and the object can be further improved, and the fastening degree of the nut is improved.
[0011] Optionally, the positioning ring is clamped in the inside of the positioning groove.
[0012] By adopting the technical scheme, the positioning ring is clamped in the inside of the positioning groove.
[0013] Optionally, the upper end of the nut body is fixedly connected with a connecting ring, and the outer edge of the upper end of the connecting ring is fixedly connected with a first clamping ring.
[0014] Optionally, the upper side of the connecting ring is provided with a sealing cap, a connecting hole is formed in the axis of the sealing cap, and a rubber gasket is fixedly connected to the inner wall of the connecting hole.
[0015] By adopting the technical scheme, the screw rod passes through the inside of the connecting hole, and the rubber gasket tightly abuts against the surface of the screw rod, so that the upper end of the nut is protected, and foreign matters are prevented from entering the inside of the nut.
[0016] Optionally, the lower end of the sealing cap is fixedly connected with a second clamping ring, and the second clamping ring is clamped on the lower side of the first clamping ring.
[0017] By adopting the technical scheme, the second clamping ring is clamped on the lower side of the first clamping ring, and the sealing cap and the upper end of the nut body are fixed.
[0018] Optionally, the nut body is hexagonal, and the six sides and the hexagon of the nut body are all cut into arc shapes.
[0019] In the above technical scheme, the technical effects and advantages of the utility model are as follows:
[0020] 1. When the nut is rotated clockwise into the surface of the screw rod, the nut rotates along the inclined and rotating direction of the wedge-shaped block, the wedge-shaped block is expanded outward along the radial direction under the pressure of the nut after contacting the object, the wedge-shaped block increases the friction between the nut and the object, and the nut is difficult to rotate, so that the self-locking function is realized, and the stability of the nut in use is improved.
[0021] 2. The sealing ring and the sealing cap are matched to seal the nut body, dust is prevented from entering the inside of the nut, pollution to the inside of the nut is avoided, the cleanliness of the inside of the nut is improved, the friction between the nut and the object can be further improved, and the fastening degree of the nut is improved. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is the whole structure schematic diagram of the utility model;
[0023] Figure 2 It is the nut main body upside structure schematic diagram of the utility model;
[0024] Figure 3 It is the nut main body downside structure schematic diagram of the utility model;
[0025] Figure 4 It is the sealing cap structure schematic diagram of the utility model;
[0026] Figure 5 It is the sealing ring structure schematic diagram of the utility model.
[0027] Brief description of the drawings:
[0028] 1, nut main body;11, connecting ring;12, first snap ring;13, thread groove;14, fixed bottom plate;15, sealing groove;16, positioning ring;17, wedge-shaped groove;18, wedge-shaped block;2, sealing cap;21, connecting hole;22, rubber washer;23, second snap ring;3, sealing ring;31, positioning groove. Specific implementation
[0029] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model will be further introduced in detail below in conjunction with the drawings.
[0030] The utility model provides a kind of self-locking nut as shown in Figures 1 to 3 Including nut main body 1, thread groove 13 is milled in the inside of nut main body 1, self-locking mechanism is provided at the lower end of nut main body 1, self-locking mechanism includes fixed bottom plate 14, wedge-shaped groove 17 and wedge-shaped block 18, fixed bottom plate 14 is welded fixed with the lower end of nut main body 1, multiple sets of wedge-shaped grooves 17 are milled in the lower surface of fixed bottom plate 14, wedge-shaped block 18 is between two wedge-shaped grooves 17, wedge-shaped block 18 is inclined, nut main body 1 is hexagonal, six surfaces of nut main body 1 are all cut into arc with hex.
[0031] Among them, in the process of processing, six surfaces of nut main body 1 are all cut into arc with hex, effectively improve the contact area with spanner surface, facilitate to tighten nut, and thread groove 13 is milled in the inside of nut main body 1, while multiple sets of wedge-shaped blocks 18 are milled on the surface of fixed bottom plate 14, then fixed bottom plate 14 is welded fixed with the lower end of nut main body 1.
[0032] Specifically, in the process of fixing the objects, first, the screw rod is inserted through the through holes on the surfaces of the two groups of objects, and then the nut body 1 is screwed into one end of the screw rod. When the nut body 1 is screwed clockwise on the surface of the screw rod, the nut body 1 rotates along the inclined and rotating direction of the wedge-shaped block 18. When the wedge-shaped block 18 contacts the object, with the continuous rotation of the nut body 1, the wedge-shaped block 18 expands radially outward under the pressure of the nut body 1, increasing the friction between the nut body 1 and the object and the surface of the screw rod. At the same time, due to the inclined direction of the wedge-shaped block 18, when the nut body 1 rotates counterclockwise, the direction of the wedge-shaped block 18 is opposite to the inclined and rotating direction of the wedge-shaped block 18. The wedge-shaped block 18 is clamped on the surface of the object, and it is difficult to rotate, thereby realizing the self-locking function and improving the stability of the nut.
[0033] participate Figure 3 and Figure 5 The center of the fixing base plate 14 is milled with an annular sealing groove 15. The inner fixed wall of the sealing groove 15 is fixedly connected with a positioning ring 16. The sealing groove 15 is clamped with a sealing ring 3. The upper surface of the sealing ring 3 is provided with a positioning groove 31. The positioning ring 16 is clamped in the inside of the positioning groove 31.
[0034] In addition, before screwing the nut body 1 into the surface of the screw rod, first, the sealing ring 3 is clamped in the inside of the sealing groove 15, and the sealing ring 3 is pressed, so that the positioning ring 16 is clamped in the inside of the positioning groove 31. With the continuous compression of the nut body 1 and the object surface, the sealing ring 3 is extruded, and the sealing ring 3 is in close contact with the object surface, further improving the friction between the nut body 1 and the object, preventing the nut body 1 from loosening, and sealing the lower end of the nut body 1 to prevent dust from entering the inside of the nut body 1.
[0035] Referring to Figure 2 and Figure 4 The upper end of the nut body 1 is fixedly connected with a connecting ring 11. The outer edge of the upper end of the connecting ring 11 is fixedly connected with a first clamping ring 12. The upper side of the connecting ring 11 is provided with a sealing cap 2. The shaft center of the sealing cap 2 is provided with a connecting hole 21. The inner wall of the connecting hole 21 is fixedly connected with a rubber gasket 22. The inner edge of the lower end of the sealing cap 2 is fixedly connected with a second clamping ring 23. The second clamping ring 23 is clamped on the lower side of the first clamping ring 12.
[0036] At the same time, after the nut body 1 is tightly fixed with the screw rod, the sealing cap 2 is sleeved on the surface of the screw rod, and the screw rod penetrates the connecting hole 21. At this time, the rubber gasket 22 is in close contact with the surface of the screw rod. At this time, the sealing cap 2 is rotated to move closer to the nut body 1, until the second clamping ring 23 is clamped on the lower side of the first clamping ring 12, the sealing cap 2 is clamped and fixed, and the sealing cap 2 seals the upper end of the nut body 1.
[0037] The utility model discloses a working principle: when the nut main body 1 is rotated clockwise into the screw surface, nut main body 1 rotates along the oblique and rotating direction of wedge block 18, after wedge block 18 contacts with the object, is expanded along the radial outward under the pressure of nut main body 1, and wedge block 18 increases the friction of nut main body 1 and the object, and then is difficult to rotate, thereby realizes self-locking function, improves the stability of nut main body 1 in the use process, and simultaneously through the cooperation of sealing washer 3 and sealing cap 2, nut main body 1 is sealed, avoids the dust into the inside of nut main body 1, avoids the pollution to the inside of nut main body 1, improves the neatness of the inside of nut main body 1, and simultaneously can further improve the friction between nut main body 1 and the object, improves the fastening degree of nut main body 1.
[0038] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the utility model and are not intended to limit the utility model. Without departing from the spirit and scope of the utility model, various changes and improvements can be made to the utility model, and these changes and improvements all fall within the scope of the claimed utility model.
Claims
1. A self-locking nut, comprising a nut body (1), characterized in that: The nut body (1) has a threaded groove (13) milled inside. The lower end of the nut body (1) is provided with a self-locking mechanism. The self-locking mechanism includes a fixed base plate (14), a wedge groove (17) and a wedge block (18). The fixed base plate (14) is welded and fixed to the lower end of the nut body (1). The lower surface of the fixed base plate (14) is milled with multiple sets of wedge grooves (17). Between two sets of wedge grooves (17) is a wedge block (18). The wedge block (18) is inclined.
2. A self-locking nut according to claim 1, characterized in that: The center of the fixed base plate (14) is milled with an annular sealing groove (15), and a positioning ring (16) is fixedly connected to the inner wall of the sealing groove (15).
3. A self-locking nut according to claim 2, characterized in that: A sealing ring (3) is snapped into the inside of the sealing groove (15), and a positioning groove (31) is provided on the upper surface of the sealing ring (3).
4. A self-locking nut according to claim 3, characterized in that: The positioning ring (16) is engaged inside the positioning groove (31).
5. A self-locking nut according to claim 1, characterized in that: The upper end of the nut body (1) is fixedly connected to a connecting ring (11), and a first retaining ring (12) is fixedly connected to the outer edge of the upper end of the connecting ring (11).
6. A self-locking nut according to claim 5, characterized in that: A sealing cap (2) is provided on the upper side of the connecting ring (11), and a connecting hole (21) is provided at the axis of the sealing cap (2). A rubber gasket (22) is fixedly connected to the inner wall of the connecting hole (21).
7. A self-locking nut according to claim 6, characterized in that: A second retaining ring (23) is fixedly connected to the inner edge of the lower end of the sealing cap (2), and the second retaining ring (23) is engaged under the first retaining ring (12).
8. A self-locking nut according to claim 1, characterized in that: The nut body (1) is hexagonal, and all six sides and six corners of the nut body (1) are cut into arc shapes.