Lock nut structure
By introducing a wire thread insert design into austenitic stainless steel nuts, the combination of inner Spirod threads and outer standard threads solves the problem of loosening of austenitic stainless steel nuts under vibration and temperature difference environments, achieving high strength and anti-loosening effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2026-03-31
AI Technical Summary
Due to their low hardness and uneven distribution of tightening force, austenitic stainless steel nuts are prone to loosening under vibration and temperature difference conditions, affecting the stability of the connection.
It adopts a wire thread sleeve design, with Spirod threads on the inner side and standard threads on the outer side. Combined with a stainless steel ring, it forms an anti-loosening nut structure, which evenly distributes the tightening force, enhances the nut strength and prevents it from loosening.
It improves the tensile strength and anti-loosening performance of nuts, enhances the reliability of nuts and bolts, and avoids the splitting and loosening problems of traditional threaded structures.
Smart Images
Figure CN224064671U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a locknut structure, especially an austenitic stainless steel locknut structure, and belongs to the technical field of fasteners. BACKGROUND
[0002] The austenitic stainless steel nut is applied to the manufacture of nuts due to excellent corrosion resistance, and the common nut structure comprises an annular stainless steel ring, an internal thread is arranged in the annular stainless steel ring, and fastening connection is achieved through cooperation with the thread of a bolt. However, due to the low hardness of the austenitic stainless steel, the fastening force distribution between the common standard threads is very uneven, the stainless steel nut is prone to splitting, the structure is loose, and under the influence of frequent vibration and large temperature difference, the standard thread is prone to loosening, thereby affecting the connection stability of the fastener. Therefore, a nut with high structural strength and capable of preventing loosening is required. SUMMARY
[0003] The utility model discloses in order to overcome above -mentioned insufficient, provided a locknut structure, its strength is high, has good anti -loosening performance.
[0004] In order to achieve this object, the utility model adopts the structure that: locknut structure, including the body and steel wire thread, the body is stainless steel ring, and internal thread is arranged in the body, and the steel wire thread is the spring shape thread cover that steel wire is wound, and the outside of steel wire thread is standard thread, and the inside is the screw thread of shibila, and the outside standard thread of steel wire thread cooperates with the inside internal thread of the body.
[0005] The inside of the steel wire end of the steel wire thread is provided with a force groove.
[0006] The bottom of the body is provided with a circle of outwardly protruding gasket.
[0007] The contact surface of the outside standard thread and the inside shibila screw thread of the steel wire thread is arc-shaped.
[0008] The utility model has the advantages of reasonable and ingenious structure, the cooperation of the steel wire thread, the shibila screw thread can play good anti-loosening effect, and the fastening force can be uniformly dispersed on the nut, the strength of the nut is strengthened, and the nut is prevented from splitting. BRIEF DESCRIPTION OF DRAWINGS
[0009] The utility model will be explained through example and with reference to the mode of the drawings, wherein:
[0010] Figure 1 It is the perspective view of the utility model;
[0011] Figure 2 It is the sectional view of the utility model;
[0012] Figure 3is a three-dimensional structure diagram of the steel wire nut. DETAILED DESCRIPTION
[0013] The utility model will be explained in further detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the structure related to the utility model.
[0014] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0015] In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be internal communication of two elements; fixed connection can be welding or gluing. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.
[0016] As shown in the anti-loose nut structure shown in Figure 1 , Figure 2 , the anti-loose nut structure comprises a body 1 and a steel wire nut 2, the body is a stainless steel ring, the outer side is a column with a polygonal cross section, and an internal thread 11 is arranged inside, the steel wire nut 2 is a spring-shaped thread sleeve wound by steel wires, the outer side of the steel wire nut 2 is a standard thread 22, and the inner side is a Schutz thread 21, the outer side standard thread 22 of the steel wire nut 2 cooperates with the inner side internal thread 11 of the body 1. When the anti-loose nut is not fastened with the bolt, there is a certain gap between the steel wire nut 2 and the body 1, when the bolt is screwed in, the Schutz thread 21 on the inner side of the steel wire nut 2 changes the stress direction of the radial force, so that the radial force is uniformly dispersed on each tooth port of the steel wire nut 2, and the uniformly dispersed force is further dispersed to the body 1, so that the body 1 is uniformly stressed, avoiding the body 1 cracking caused by the high stress ratio of one buckle and two buckles during traditional thread fastening, improving the strength of the nut as a fastener, and increasing the tensile strength from the original 700MPa to 1040MPa. At the same time, the Schutz thread 21 has good anti-loose performance, which can improve the reliability of the nut and the bolt.
[0017] As Figure 3 shown, the steel wire nut 2 is provided with a force slot 23 inside the steel wire end, which facilitates the disassembly of the body 1 and the steel wire nut 1, and does not need to reduce the tail of the steel wire nut 2 after the equipment is completed, thereby reducing the generation of burrs.
[0018] The bottom of the body 1 is provided with a ring of outwardly protruding gasket 3, which plays a role in dispersing the axial pressure of the body 1 and reducing the damage caused by the body 1 to the connected equipment.
[0019] The contact surface of the standard thread 22 on the outer side of the steel wire nut 1 and the internal thread 11 on the body 1 is uniformly arc-shaped, and the contact surface of the internal force slot 21 is also arc-shaped, so that the steel wire nut 1 can be flexibly transformed in position between the body 1 and the bolt due to the change of the fastening force, avoiding the direct cooperation of the bolt and the nut to cause seizure and difficult disassembly.
[0020] According to the above-mentioned utility model, through the above-mentioned description, relevant staff can make various changes and modifications without deviating from the technical idea of the utility model. The technical scope of the utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.
Claims
1. A locking nut structure comprising a body (1) and a wire thread insert (2), characterized in that, The body (1) is a stainless steel ring, internally provided with internal threads (11), the steel wire sleeve (2) is a spring-shaped threaded sleeve wound by steel wires, the outer side of the steel wire sleeve (2) is provided with standard threads (22), and the inner side is provided with Possil threads (21), the outer side standard threads (22) of the steel wire sleeve (2) are matched with the inner side internal threads (11) of the body (1).
2. The lock nut structure according to claim 1, characterized by The steel wire sleeve (2) is internally provided with a force groove (23) at the end of the steel wire.
3. The lock nut structure according to claim 1, characterized by The bottom of the body (1) is provided with a gasket (3) outwardly protruding.
4. The lock nut structure according to claim 1, characterized by The contact surfaces of the outer side standard threads (22) and the inner side Possil threads (21) of the steel wire sleeve (2) are both arc-shaped.