Anti-loosening structure of thread pair
By setting unequal numbers of axial grooves on the thread and inserting anti-loosening components, the problem of insufficient versatility and reliability of existing thread anti-loosening structures is solved, providing an anti-loosening solution with a simple structure and strong adaptability.
Patent Information
- Application Number
- CN202422206988.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-09-10
AI Technical Summary
Existing thread anti-loosening structures are insufficient in terms of versatility and reliability. In particular, the friction method and the mechanical braking method each have their own defects and are difficult to effectively prevent thread rollback.
A threaded pair anti-loosening structure is designed by setting multiple axial grooves of varying numbers on the threads of the first and second components to form a locking groove. An anti-loosening component is inserted into the locking groove to restrict the relative movement of the internal and external threads, thereby achieving anti-loosening.
It achieves a simple and versatile anti-loosening effect on threads without affecting thread strength, has a wide range of applications, and is convenient and quick to disassemble.
Smart Images
Figure CN223483135U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of anti-loosening structure technology, specifically relating to an anti-loosening structure for threaded pairs. Background Technology
[0002] There are two main types of thread locking methods: friction braking and mechanical braking. Friction braking increases the friction between the contact surfaces of the threaded parts, ensuring it always exceeds the force required for loosening, thus preventing thread rollback. For example, the conventional double-nut method involves tightening the lower and upper nuts sequentially to eliminate gaps in the threaded engagement and increase friction to ensure a tight lock. Another method is the Japanese concave-convex nut method, which also falls under friction. The convex nut has an eccentric conical boss; after tightening, the difference from the conventional double-nut method is that the entire thread of the convex nut presses against one side of the bolt, while the entire thread of the concave nut presses against the opposite side of the bolt's thread. This generates greater clamping friction, resulting in better anti-loosening performance. Theoretically, applying anaerobic adhesive to the thread surface to harden the narrow gap between the threads and prevent screw rollback also falls under friction. Friction locking only reduces the probability of loosening and is less reliable than mechanical braking. Mechanical braking methods, such as the common slotted nut + cotter pin and locking washer, use special structural shapes to prevent thread rollback. The slotted nut + cotter pin solution requires machining a transverse hole on the external thread, while the locking washer solution requires cutting a large slot on the external thread, both of which affect their versatility or scope of application.
[0003] Therefore, for the technical field, it is of great practical significance to provide a new type of anti-loosening structure for threaded pairs to solve or improve at least one of the above-mentioned technical problems. Utility Model Content
[0004] The purpose of this invention is to provide a new type of anti-loosening structure for threaded pairs, so as to solve or improve at least one technical problem existing in related technologies.
[0005] To solve the above-mentioned technical problems, the technical solution proposed by this utility model is as follows:
[0006] A threaded joint anti-loosening structure includes,
[0007] A first component, the first component being provided with external threads;
[0008] The second component has an internal thread that mates with the external thread;
[0009] Anti-loosening components;
[0010] The external thread portion of the first component is provided with a first groove extending along its axial direction, and the internal thread portion of the second component is provided with a second groove extending along its axial direction. The first groove and the second groove cooperate to form a locking groove for accommodating the anti-loosening element.
[0011] As an improvement to the aforementioned anti-loosening structure for threaded parts, there are multiple first grooves, which are arranged at intervals along the circumference of the first component; and there are multiple second grooves, which are arranged at intervals along the circumference of the second component.
[0012] As an improvement to the aforementioned anti-loosening structure for threaded pairs, the number of the first groove is not equal to the number of the second groove.
[0013] As an improvement to the aforementioned threaded anti-loosening structure, the anti-loosening element includes a head adapted for deformation, the radial dimension of which is larger than the radial dimension of the locking groove.
[0014] As an improvement to the aforementioned anti-loosening structure for threaded pairs, the anti-loosening component is made of aluminum.
[0015] As an improvement to the aforementioned anti-loosening structure for threaded pairs, the anti-loosening component includes a columnar portion connected to the head, and the columnar portion has a pointed tail at one end facing away from the head.
[0016] As an improvement to the aforementioned anti-loosening structure of the threaded pair, the anti-loosening component is a hollow spring pin made of a thin elastic metal sheet.
[0017] As an improvement to the aforementioned anti-loosening structure for threaded pairs, the anti-loosening component is a glue-molded part.
[0018] As an improvement to the aforementioned anti-loosening structure for threaded pairs, the depth of the first groove is less than the height of the external thread.
[0019] As an improvement to the aforementioned anti-loosening structure for threaded pairs, the depth of the second groove is less than the height of the internal thread.
[0020] The threaded anti-loosening structure provided in this embodiment of the utility model only requires tightening the threads using conventional methods. After reaching the set tightening conditions, the relative positions of the two threads are slightly adjusted so that the first and second grooves cooperate to form a locking groove for accommodating the anti-loosening component. Then, the anti-loosening component is inserted. Under the limiting action of the anti-loosening component, the internal and external threads can no longer move relative to each other, thereby achieving thread anti-loosening. Therefore, the threaded anti-loosening structure provided in this embodiment of the utility model is simple in structure and highly versatile. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the anti-loosening structure of the threaded pair according to one embodiment of the present invention.
[0023] Figure 2 This is a schematic diagram of the anti-loosening component according to one embodiment of the present invention.
[0024] Figure 3 This is a schematic diagram of the anti-loosening component according to one embodiment of the present invention.
[0025] Figure 4 This is a schematic diagram of the anti-loosening structure of the threaded pair according to one embodiment of the present invention.
[0026] Figure 5 This is a schematic diagram of the structure of the first component according to one embodiment of the present invention.
[0027] Figure 6 This is a schematic diagram of the structure of the second component according to one embodiment of the present invention.
[0028] Legend:
[0029] 1. First component; 2. Second component; 3. Anti-loosening component; 11. First groove; 21. Second groove; 31. Head; 32. Hollow spring pin. Detailed Implementation
[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the threaded anti-loosening structure provided in this embodiment of the utility model includes a first component 1, which has an external thread; a second component 2, which has an internal thread that mates with the external thread; and an anti-loosening member 3. The external thread portion of the first component 1 has a first groove 11 extending axially therefrom, and the internal thread portion of the second component 2 has a second groove 21 extending axially therefrom. The first groove 11 and the second groove 21 cooperate to form a locking groove for accommodating the anti-loosening member 3.
[0036] It should be noted that the first component 1 can be a bolt or other threaded component, such as a shaft component integrated into the equipment. The second component 2 can be a nut or other threaded component, such as a threaded hole in the equipment, or even both internal and external threads may be part of the equipment or component. The anti-loosening component 3 can be a locking pin. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In the embodiment shown, the first component 1 is a bolt, the second component 2 is a nut, the anti-loosening component 3 can be a locking pin, the first groove 11 is an outer locking groove, and the second groove 21 is an inner locking groove.
[0037] The threaded anti-loosening structure provided in this embodiment of the utility model only requires tightening the threads using conventional methods. After reaching the set tightening conditions, the relative positions of the two threads are slightly adjusted so that the first groove 11 and the second groove 21 cooperate to form a locking groove for accommodating the anti-loosening member 3. Then, the anti-loosening member 3 is inserted. Under the limiting action of the anti-loosening member 3, the internal and external threads can no longer move relative to each other, thereby achieving thread anti-loosening. Therefore, the threaded anti-loosening structure provided in this embodiment of the utility model is simple in structure and highly versatile.
[0038] To reduce the adjustment range, in some embodiments of this invention, the number of first grooves 11 is multiple, and these multiple first grooves 11 are arranged at intervals along the circumference of the first component 1. The number of second grooves 21 is also multiple, and these multiple second grooves 21 are arranged at intervals along the circumference of the second component 2. Thus, as long as any one of the multiple first grooves 11 and any one of the multiple second grooves 21 aligns and cooperates to form a locking groove for accommodating the anti-loosening member 3, anti-loosening can be achieved. Preferably, the number of first grooves 11 and the number of second grooves 21 are not equal. Specifically, optionally, the number of second grooves 21 is greater than the number of first grooves 11, preferably by mathematically obtaining a greatest common multiple of the two. This minimizes the angle adjustment required to align and form the locking groove. Figure 5 As shown, the external thread portion of the first component 1 is machined with multiple first grooves 11. In this embodiment, five grooves are specified. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the internal thread portion of the second component 2 is machined with multiple second grooves 21; in this embodiment, six grooves are specified. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, during the process of screwing the second component 2 into the first component 1, the first groove 11 and the second groove 21 will align one by one at a 12° interval, which is a relatively small angle. When the thread is tightened according to the conventional method, when the thread is tightened to the specified value, it is only necessary to tighten it by no more than 12°, and a set of first groove 11 and second groove 21 will be aligned. At this position, the anti-loosening component 3 is inserted to complete the thread locking.
[0039] It is understood that the anti-loosening component 3 must be reliably fixed in the locking groove to ensure reliable anti-loosening. In some embodiments of this utility model, the anti-loosening component 3 includes a deformable head 31, the radial dimension of which is larger than the radial dimension of the locking groove. The head 31 can be made of a softer aluminum material; specifically, the anti-loosening component 3 is an aluminum part with a slightly larger head 31. After the anti-loosening component 3 is inserted into the first groove 11 and the second groove 21, the head 31 will protrude from the second component 2. A softer hammer can be used to strike the head 31, deforming it and embedding it into the adjacent thread. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, regardless of future vibrations, the anti-loosening component 3 will not come out. When the first component 1 needs to be disassembled later, simply loosen the threads using conventional methods; the aluminum anti-loosening component 3 can be directly sheared by the internal and external threads, thus simplifying the work. In some embodiments of this utility model, the anti-loosening component 3 includes a columnar portion connected to the head 31, with a pointed tail at one end facing away from the head 31. This makes the anti-loosening component 3 cylindrical overall, with one end slightly pointed to form a pointed tail, facilitating insertion into the locking groove. Once the anti-loosening component 3 is inserted into the aforementioned aligned set of locking grooves, the internal and external threads can no longer move relative to each other, thus achieving thread anti-loosening. In this embodiment, the anti-loosening component 3 is made of a material softer than the first component 1 and / or the second component 2. For example, the anti-loosening component 3 can be made of a material with lower strength or softer than the first component 1. The exposed portion protruding from the second component 2 is a slightly larger head 31. After the anti-loosening component 3 is inserted into the locking groove, the locking pin head 31 is deformed by striking it with a tool, embedding it into the adjacent thread. At this point, the anti-loosening component 3 is reliably fixed in the locking groove and will not come out again. In this embodiment, the anti-loosening component 3 is easily sheared when disassembling the threaded pair, but it will not shear under the natural working conditions of the threaded pair due to equipment vibration or changes in bolt tightening force. The anti-loosening component 3 made of a softer material can be fixed in the groove by various methods to ensure that it will not move. This method requires little modification to existing processes, has low cost, and is widely applicable.
[0040] In some embodiments of this utility model, such as Figure 3 As shown, the anti-loosening component 3 is a hollow spring pin 32 made of a thin, elastic metal sheet. In this embodiment, when installing the anti-loosening component 3, it needs to be forcefully driven or pressed into the locking groove formed by the first groove 11 and the second groove 21, leaving only the head exposed for future disassembly. With the help of the spring, the hollow spring pin 32 and the locking groove are tightly fitted, ensuring that the anti-loosening component 3 will not come out. When it is necessary to remove the threads later, the hollow spring pin 32 must be removed first, and then the threads can be loosened using conventional methods.
[0041] In some embodiments of this utility model, the anti-loosening component 3 is an injection-molded part, meaning that the anti-loosening component 3 is formed by injecting curable adhesive on-site and then solidifying it. The anti-loosening component 3 can also be made of two-component AB adhesive, pressed into the locking groove to be installed using an injection device, and solidified to form the anti-loosening component 3. This method eliminates the risk of detachment, is reliable, and lightweight. The anti-loosening component 3 made of adhesive can also have a partially exposed head. In case the anti-loosening component 3 is cut off, the head will fall off and be easily detected, thereby improving the system's fault tolerance or reliability. If the head is not visible, it indicates that the thread has loosened, simplifying the inspection work and avoiding greater losses. In this embodiment, the anti-loosening component 3 is easily sheared off when disassembling the threaded pair, but under the natural working conditions of the threaded pair, it will not be sheared off due to equipment vibration or changes in bolt tightening force.
[0042] In some embodiments of this utility model, the depth of the first groove 11 is less than the height of the external thread, the depth of the second groove 21 is less than the height of the internal thread, and the depth of the locking groove is slightly less than the thread height, so as not to weaken the strength of the first component 1 and the second component 2. In some embodiments of this utility model, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the first groove 11 is open at one end of the first component 1 and extends from one end of the first component 1 toward the middle, and the second groove 21 extends from one end of the second component 2 to the other end of the second component 2 and is open at both ends. The axial length of the first groove 11 is greater than the axial length of the second component 2.
[0043] In summary, the threaded anti-loosening structure provided by this utility model embodiment only requires tightening the threads using conventional methods. After reaching the set tightening conditions, the relative positions of the two threads are slightly adjusted so that the first groove 11 and the second groove 21 cooperate to form a locking groove for accommodating the anti-loosening member 3. Then, the anti-loosening member 3 is inserted. Under the limiting effect of the anti-loosening member 3, the internal and external threads can no longer move relative to each other, thereby achieving thread anti-loosening. Inserting the anti-loosening member 3 into the aforementioned locking groove position, through the structural shape of the anti-loosening member 3, prevents the internal and external threads from moving relative to each other, or prevents the threads from loosening. From a manufacturing perspective, the aforementioned locking grooves of the internal and external threads can be directly machined using a punch press, with minimal impact on the manufacturing process and low cost. This invention only requires partially removing a small portion of the thread, without damaging the thread strength, so it has a wide applicability to thread diameters, and can also be implemented for small threads.
[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A threaded pair anti-loosening structure, characterized in that: include, The first component (1) is provided with an external thread; The second component (2) is provided with an internal thread that mates with the external thread; Anti-loosening component (3); The external thread portion of the first component (1) is provided with a first groove (11) extending along its axial direction, and the internal thread portion of the second component (2) is provided with a second groove (21) extending along its axial direction. The first groove (11) and the second groove (21) cooperate to form a locking groove for accommodating the anti-loosening member (3).
2. The threaded anti-loosening structure according to claim 1, characterized in that: The number of first slots (11) is multiple, and the multiple first slots (11) are arranged at intervals along the circumference of the first component (1). The number of second slots (21) is multiple, and the multiple second slots (21) are arranged at intervals along the circumference of the second component (2).
3. The threaded anti-loosening structure according to claim 2, characterized in that: The number of the first slot (11) is not equal to the number of the second slot (21).
4. The threaded pair anti-loosening structure according to any one of claims 1-3, characterized in that: The anti-loosening component (3) includes a deformable head (31) with a radial dimension greater than that of the locking groove.
5. The threaded anti-loosening structure according to claim 4, characterized in that: The anti-loosening component (3) is made of aluminum.
6. The threaded anti-loosening structure according to claim 4, characterized in that: The anti-loosening component (3) includes a columnar portion connected to the head (31), and the end of the columnar portion facing away from the head (31) is provided with a pointed tail.
7. The threaded pair anti-loosening structure according to any one of claims 1-3, characterized in that: The anti-loosening component (3) is a hollow spring pin (32) made of elastic metal sheet rolled into shape.
8. The threaded pair anti-loosening structure according to any one of claims 1-3, characterized in that: The anti-loosening component (3) is a glue-molded component.
9. The threaded pair anti-loosening structure according to any one of claims 1-3, characterized in that: The depth of the first groove (11) is less than the height of the external thread.
10. The threaded pair anti-loosening structure according to any one of claims 1-3, characterized in that: The depth of the second groove (21) is less than the height of the internal thread.