Binding lock nut
By designing a screw and nut mechanism, combined with a locking component, the problem of poor fixing effect of existing anti-loosening nuts on curved mounting bodies is solved, achieving stable support and fastening of nuts on curved mounting bodies and enhancing anti-loosening performance.
Patent Information
- Application Number
- CN202511843078.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-09
- Publication Date
- 2026-01-09
AI Technical Summary
Existing anti-loosening nuts are not effective at securing curved mounting surfaces, making it difficult to fit them properly, resulting in insufficient stability and tightness of the nuts.
A locking nut with a ferrule is designed, comprising a screw mechanism and a nut mechanism. The screw mechanism is tightly fitted to the outer side of the mounting body through a first contact end face, and the nut mechanism is tightly fitted to the inner arc surface of the mounting body through a second contact end face. The contact body is fixed by the cooperation of a limiting groove and a protrusion, and a locking component is used to prevent the nut from rotating, thereby enhancing the locking effect.
It achieves stable support and fastening of the nut on the arc-shaped mounting body, prevents loosening, improves installation speed and stability, is suitable for ring-shaped mounting bodies, and enhances the nut's anti-loosening performance.
Smart Images
Figure CN121296568A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of nut technology, and more specifically, to a loosening nut with a ferrule. Background Technology
[0002] A nut is a part used to tightly connect mechanical equipment. It is usually screwed together with a bolt or screw to fasten it. It is an essential component in all manufacturing machinery. Depending on the material, it is divided into several types such as carbon steel, stainless steel, and non-ferrous metals. The nut has threads on the inside, and only nuts and bolts of the same specification can be connected together.
[0003] In related technologies, in order to prevent the nuts from loosening after installation, some anti-loosening nuts with self-locking function have emerged. Although they can have a good anti-loosening effect, most of them are only suitable for flat mounting bodies. When the contact surface between the mounting body and the nut is arc-shaped, the existing anti-loosening nuts cannot effectively fit the arc-shaped contact surface, resulting in an unsatisfactory fixing effect of the nut. Summary of the Invention
[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a loosening nut with a constricted opening.
[0005] To achieve the above objectives, the present invention provides the following technical solution, comprising: a screw mechanism and a nut mechanism, wherein the nut mechanism is used to fix the end of the screw mechanism; The screw mechanism includes a connecting body, one end of which is provided with a first contact end face adapted to the outside of the mounting body, and a first stud and a second stud are respectively fixedly installed at both ends of the connecting body; The nut mechanism includes a cap body and a contact body. The contact body is rotatably mounted on the end of the cap body. One end of the contact body is provided with a second contact end face that is adapted to the inner side of the mounting body. A limiting groove is formed on the outer side of the first stud. A protrusion adapted to the limiting groove is fixedly mounted on the inner side of the contact body. When the nut mechanism is connected to the screw mechanism, the position of the contact body is fixed by sliding the protrusion in the limiting groove.
[0006] Compared with the prior art, the present invention has the following beneficial effects: (1) A nut structure is formed by setting a screw mechanism and a nut mechanism. It is suitable for ring-shaped mounting bodies. The screw mechanism is mainly connected to the external mounting components to play a supporting role. The screw mechanism can be tightly fitted to the outside of the mounting body by setting a first contact end face on the connecting body that is compatible with the outside of the mounting body, which is beneficial to improving the support stability of the screw mechanism. The nut mechanism is primarily used to secure the installed screw mechanism. A contact body is rotatably positioned at the bottom of the nut, serving as a bottom support structure to prevent direct contact between the nut and the inner curved surface of the mounting surface. The contact body has a second contact end face at its bottom that mates with the inner curved surface of the mounting surface, ensuring a tight fit and providing stable support for the nut, maintaining an effective fastening. This allows the nut to adapt well to curved mounting surfaces. A protrusion on the contact body, which slides in conjunction with a limiting groove on the first stud, limits the contact body's position. This prevents the contact body from rotating with the nut, keeping its position fixed. This ensures precise contact with the inner curved surface of the mounting surface, providing stable support. Furthermore, it eliminates the need for manual adjustment, quickly reaching the designated position and accelerating the nut installation process, making installation more convenient and efficient.
[0007] (2) By setting this locking component, it is mainly used to lock the position of the nut mechanism after installation, to prevent the nut body from rotating relative to each other during use, which is conducive to enhancing the anti-loosening effect of the nut and making it more suitable for the ring-shaped mounting body; Among them, by setting the movable rod, it is not only used to lock the position of the contact body and the nut body, but also, when installing the stud mechanism, the movable rod can be engaged with the through hole on the mounting body to quickly determine the installation position of the stud mechanism, and to prevent the nut mechanism from rotating relative to each other during installation, so that the nut mechanism is synchronously aligned with the inner arc surface of the mounting body and the screw mechanism, which is conducive to improving the overall installation fit of the nut and enhancing its stability; In addition, by setting a rotating component, it is not only used to push the movable rod to move, so that the locking rod can complete the locking action, but also to seal the top of the cap body to prevent external impurities from entering the inner cavity of the cap body and affecting the connection between the cap body and the first stud. Attached Figure Description
[0008] Figure 1 This invention provides a schematic diagram of the structure of a pre-locking nut during installation. Figure 2 A cross-sectional view of a pre-locking nut during installation, provided by the present invention; Figure 3 for Figure 2 A magnified view of a portion of region A shown in the diagram; Figure 4 This is a schematic diagram of the structure of a loop-type anti-loosening nut provided by the present invention; Figure 5 An exploded view of a pre-locking nut provided by the present invention.
[0009] 1. Screw mechanism; 11. Connecting body; 12. First stud; 13. Second stud; 14. Locking component; 141. Rotating component; 142. Locking rod; 143. Moving rod; 144. Moving groove; 145. Support spring; 146. Snap-fit hole; 2. Nut mechanism; 21. Nut body; 22. Contact body; 23. Limiting groove; 24. Protrusion; 25. Marking groove; 3. Mounting body. Detailed Implementation
[0010] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.
[0011] Reference Figures 1 to 5 The following is a further description of an embodiment of the anti-loosening nut of the present invention.
[0012] A locking nut with a ferrule includes a screw mechanism 1 and a nut mechanism 2. The nut mechanism 2 is used to fix the end of the screw mechanism 1. The screw mechanism 1 includes a connecting body 11. One end of the connecting body 11 is provided with a first contact end face that is adapted to the outer side of the mounting body 3. A first stud 12 and a second stud 13 are respectively fixedly installed at both ends of the connecting body 11. The first contact end face is an inwardly concave arc surface, which is used to adapt to the arc-shaped mounting surface on the outer side of the mounting body 3, so that the connecting body 11 can fit tightly with the arc-shaped mounting surface. When the screw mechanism 1 is in use, the first contact end face is facing the outer arc surface of the mounting body 3, and the first stud 12 is inserted into the mounting hole on the mounting body 3, so that the first stud 12 extends to the inner side of the mounting body 3, and finally the first contact end face is tightly fitted with the outer arc surface of the mounting body 3, thus completing the installation operation of the screw mechanism 1.
[0013] The nut mechanism 2 includes a cap body 21 and a contact body 22. The contact body 22 is rotatably mounted on the end of the cap body 21. One end of the contact body 22 is provided with a second contact end face that is adapted to the inner side of the mounting body 3. The second contact end face is an outwardly convex arc surface, which is used to adapt to the arc surface of the inner side of the mounting body 3 and can fit tightly with the inner arc surface. A limiting groove 23 is provided on the outer side of the first stud 12. A protrusion 24 adapted to the limiting groove 23 is fixedly installed on the inner side of the contact body 22. When the nut mechanism 2 is connected to the screw mechanism 1, the position of the contact body 22 is fixed by sliding the protrusion 24 in the limiting groove 23, so that it will not rotate with the cap body 21. The first stud 12 is used to connect with the cap body 21. The inner cavity of the cap body 21 is provided with a threaded groove adapted to the first stud 12. The second stud 13 is used to connect with the external part to be installed. A threaded groove is provided on the outer side of the second stud 13. After the screw mechanism 1 is installed, the nut mechanism 2 needs to be installed on the screw mechanism 1 to fix the screw mechanism 1. This is done by aligning the protrusion 24 with the limiting groove 23, and then fitting the contact body 22 onto the first stud 12. Next, rotate the cap body 21 so that the cap body 21 moves the contact body 22 down gradually. Because the contact body 22 is restricted by the protrusion 24, it will not rotate with the cap body 21, and the cap body 21 will not be restricted by the contact body 22, until the second contact end face at the bottom of the contact body 22 is in contact with the inner arc surface of the mounting body 3. Under the stable support of the contact body 22, the cap body 21 maintains an effective fastening effect. The nut structure of this invention mainly consists of a screw mechanism 1 and a nut mechanism 2. It is suitable for ring-shaped mounting bodies 3. The screw mechanism 1 primarily connects to external mounting components, providing support. A first contact end face adapted to the outer side of the mounting body 3 is provided on the connecting body 11, allowing the screw mechanism 1 to fit tightly against the outer side of the mounting body 3, thus improving the support stability of the screw mechanism 1. The nut mechanism 2 is mainly used to fix the screw mechanism 1 after installation. A contact body 22 is rotatably provided at the bottom end of the cap 21, serving as a bottom support structure for the cap 21 and preventing direct contact between the cap 21 and the inner arc surface of the mounting body 3. A second contact body 22 adapted to the inner arc surface of the mounting body 3 is provided at the bottom end of the contact body 22. The contact end face allows the contact body 22 to maintain a tight fit with the inner arc surface of the mounting body 3, thereby providing stable support for the cap body 21 and keeping it in an effective fastening state. This allows the cap body 21 to adapt well to the arc-shaped mounting surface. By setting a protrusion 24 on the contact body 22, and using the cooperation of the protrusion 24 with the limiting groove 23 on the first stud 12 to slide, the contact body 22 can be limited. When the cap body 21 rotates, it can prevent the contact body 22 from rotating with it, keeping the position of the contact body 22 fixed. On the one hand, this is conducive to its precise contact with the inner arc surface of the mounting body 3, thereby providing stable support for the cap body 21. On the other hand, it eliminates the need for manual adjustment and quickly reaches the designated position, which helps to speed up the installation of the cap body 21 and makes the installation process more convenient and time-saving.
[0014] As an embodiment of the present invention, in order to further improve the fastening effect of the nut structure, the present invention provides a locking component 14. Specifically, the screw mechanism 1 further includes a locking component 14, which includes a rotating member 141, a locking rod 142, and a movable rod 143. The rotating member 141 is threadedly installed on the upper end of the cap body 21. A regular hexagonal mating groove is provided on the top of the rotating member 141 to facilitate connection with the rotating member 141 using external tools. A U-shaped movable groove 144 is provided inside the connecting body 11, and the end of the movable groove 144 extends from the inside of the connecting body 11 to the first stud 1. At the end of 2, the locking rod 142 and the movable rod 143 are slidably installed in the two vertical sections of the movable groove 144. A support spring 145 is fixedly installed between the bottom end of the locking rod 142 and the movable groove 144. The movable groove 144 is filled with a filling medium between the locking rod 142 and the movable rod 143. The filling medium is hydraulic oil. A snap-fit hole 146 adapted to the locking rod 142 is opened on the side of the contact body 22 near the second contact surface. The snap-fit hole 146 extends upward to the bottom of the cap body 21. The top end of the locking rod 142 is set in an arc shape so that it can be easily snapped into the snap-fit hole 146. It should be noted that when the screw mechanism 1 is installed on the outside of the mounting body 3, the outside of the mounting body 3 is provided with a through hole that is compatible with the locking rod 142, and the locking rod 142 extends to the outside of the connecting body 11 in its natural state. At this time, it is only necessary to align the locking rod 142 with the through hole for installation, and the overall position of the screw mechanism 1 remains fixed after installation. When using the locking component 14, the cap body 21 is already installed. Then, using an auxiliary tool, its end is engaged in the mating groove on the top of the rotating component 141. This causes the rotating component 141 to rotate, simultaneously moving downwards along the inner side of the cap body 21 and pressing against the movable rod 143. As the movable rod 143 moves downwards, it presses against the hydraulic oil, allowing the hydraulic oil to push the locking rod 142 upwards. The locking rod 142 then extends into the snap-fit hole 146 and stretches the support spring 145. Because the screw mechanism 1 is limited by the locking rod 142 during installation, it remains in the standard position, while the contact body 22 is limited by the protrusion 24. The function is to ensure that the contact body 22 is in the standard position after installation. At this time, the snap-fit hole 146 on the contact body 22 can be aligned with the locking rod 142, so that the top of the locking rod 142 can extend smoothly into the snap-fit hole 146. Finally, it can simultaneously snap-fit and lock the cap body 21 and the contact body 22, so that the cap body 21 will not loosen. When it is necessary to remove the nut mechanism 2, the rotating part 141 is rotated in the opposite direction to move it upward. At the same time, under the elastic force of the support spring 145, the locking rod 142 can be driven to move downward to reset and squeeze the hydraulic oil to flow, so that the bottom end of the movable rod 143 is always in contact with the hydraulic oil surface. The locking component 14 is primarily used to lock the position of the installed nut mechanism 2, preventing relative rotation of the cap 21 during use. This enhances the anti-loosening effect of the nut and makes it more suitable for the annular mounting body 3. The movable rod 143 not only locks the positions of the contact body 22 and the cap 21, but also, during stud installation, engages with the through hole on the mounting body 3 to quickly determine the stud mechanism's installation position, ensuring the nut mechanism is securely in place during installation. There will be no relative rotation, so when the nut mechanism 2 is installed later, the nut mechanism 2 can be synchronously aligned with the inner arc surface of the mounting body 3 and the screw mechanism 1, which will help improve the overall installation fit of the nut and enhance its stability. In addition, by setting the rotating part 141, it is not only used to push the movable rod 143 to move, so that the locking rod 142 can complete the locking action, but also to seal the top of the cap body 21 to prevent external impurities from entering the inner cavity of the cap body 21 and affecting the connection between the cap body 21 and the first stud 12.
[0015] As an embodiment of the present invention, in order to ensure that the snap-fit hole 146 on the cap body 21 is aligned with the snap-fit hole 146 on the contact body 22 when rotating the cap body 21, the present invention further optimizes the above solution. Specifically, a marking groove 25 is provided on the outer side of the cap body 21 and the top of the contact body 22. When the two marking grooves 25 overlap, it indicates that the cap body 21 has reached the standard installation position. By setting two marking grooves 25, the staff can intuitively see whether the cap body 21 has reached the standard position. On the one hand, it ensures that the snap-fit hole 146 on the cap body 21 and the snap-fit hole 146 on the contact body 22 can be accurately aligned, which is conducive to the subsequent extension of the locking rod 142 to complete the locking operation. On the other hand, it ensures that the cap body 21 can reach the standard position so that it can play a stable fixing effect.
[0016] As an embodiment of the present invention, a common feature of current anti-loosening nuts using rolling technology to shrink the thread opening is that they focus on strengthening the axial friction of the nut without closing the radial clearance of the nut. This fails to effectively prevent relative movement between the nut and bolt during vibration, resulting in weak anti-loosening performance. Therefore, to solve this problem, the present invention optimizes the above solution as follows: the pitch of the last threaded groove on the upper end of the cap 21 is 5% smaller than the pitch of the threads in other positions; the major diameter of the internal thread is 20% smaller than the pitch of the threads in other positions. The anti-loosening principle of this method is that the axial and radial forces at the upper end of the cap 21 together compress and clamp the threads of the first stud 12, forming an interference fit, effectively preventing relative movement between the nut and bolt during vibration, thereby achieving a reliable anti-loosening effect. This method can adapt to bolts of different shapes and specifications, such as standard round-mouth anti-loosening nuts, elliptical-mouth anti-loosening nuts, and point-pressure mouth anti-loosening nuts. It can be selected according to different usage scenarios and anti-loosening requirements. Installation and use are the same as ordinary nuts, requiring no additional tools or operating steps.
[0017] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0018] 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 invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0019] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.
Claims
1. A type of anti-loosening nut with a constricted opening, characterized in that, include: A screw mechanism (1) and a nut mechanism (2), wherein the nut mechanism (2) is used to fix the end of the screw mechanism (1); The screw mechanism (1) includes a connecting body (11), one end of which is provided with a first contact end face that is adapted to the outside of the mounting body (3), and the two ends of the connecting body (11) are respectively fixedly installed with a first stud (12) and a second stud (13). The nut mechanism (2) includes a cap body (21) and a contact body (22). The contact body (22) is rotatably mounted on the end of the cap body (21). One end of the contact body (22) is provided with a second contact end face that is adapted to the inner side of the mounting body (3). A limiting groove (23) is provided on the outer side of the first stud (12). A protrusion (24) adapted to the limiting groove (23) is fixedly mounted on the inner side of the contact body (22). When the nut mechanism (2) is connected to the screw mechanism (1), the position of the contact body (22) is fixed by sliding the protrusion (24) in the limiting groove (23).
2. The anti-loosening nut according to claim 1, characterized in that, The first contact end face is an inwardly concave arc surface, and the second contact end face is an outwardly convex arc surface.
3. The anti-loosening nut according to claim 2, characterized in that, The first stud (12) is used to connect with the cap body (21), and the inner cavity of the cap body (21) is provided with a threaded groove that is adapted to the first stud (12).
4. The anti-loosening nut according to claim 3, characterized in that, The second stud (13) is used to connect with the external part to be installed, and the second stud (13) has a threaded groove on its outer side.
5. The anti-loosening nut according to claim 4, characterized in that, The screw mechanism (1) further includes a locking component (14), which includes a rotating component (141), a locking rod (142), and a movable rod (143). The rotating component (141) is threaded onto the upper end of the cap body (21). A U-shaped movable groove (144) is provided inside the connecting body (11). The end of the movable groove (144) extends from inside the connecting body (11) to the end of the first stud (12). The locking rod (142) and the movable rod (143) slide relative to each other. The locking rod (142) is fixedly installed in the two vertical sections of the movable groove (144). A support spring (145) is fixedly installed between the bottom end of the locking rod (142) and the movable groove (144). The movable groove (144) is filled with a filling medium between the locking rod (142) and the movable rod (143). The contact body (22) has a snap-fit hole (146) adapted to the locking rod (142) on the side near the second contact surface. The snap-fit hole (146) extends upward to the bottom of the cap body (21).
6. The anti-loosening nut according to claim 5, characterized in that, The filling medium is hydraulic oil, and the top of the locking rod (142) is set in an arc shape.
7. The anti-loosening nut according to claim 5, characterized in that, Marking grooves (25) are provided on the outer side of the cap body (21) and the top of the contact body (22). When the two marking grooves (25) overlap, it indicates that the cap body (21) has reached the standard installation position.
8. The anti-loosening nut according to claim 7, characterized in that, The pitch of the last threaded groove at the upper end of the cap body (21) is 5% smaller than the pitch of the threaded groove at other positions; the major diameter of the internal thread is 20% smaller than the pitch of the threaded groove at other positions.