Hexagon torque lock nut and fastener
By setting six opposite sides on the outer ring of the locking nut and setting a locking part on each set of opposite sides, the structure is optimized to increase the torque, which solves the problem of loosening of the locking nut under special working conditions and achieves higher locking strength and anti-loosening effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FAWER AUTOMOTIVE PARTS LIMITED COMPARTY
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-29
AI Technical Summary
Existing locking nuts are prone to loosening under special working conditions such as vibration, high temperature, and high humidity, which affects the locking strength.
A hexagonal torque locking nut was designed. By setting six opposite sides on the outer ring surface of the locking body, with each pair of opposite sides arranged in a group and a locking part set on each group of opposite sides, the structure is optimized to increase torque, reduce assembly gap, and improve locking effect.
Under special working conditions, the hexagonal torque lock nut significantly improves the locking strength, reduces the risk of loosening, and enhances the anti-loosening effect.
Smart Images
Figure CN224301212U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fastener technology, and in particular to a hexagonal torque lock nut and fastener. Background Technology
[0002] Currently, the self-locking reliability of lock nuts decreases under dynamic loads, often requiring loosening measures to improve the reliability of the nut's locking mechanism. Common lock nuts typically include the following types:
[0003] Torque-locking nuts with opposite sides: In practical applications, relying solely on the torque of two opposite sides results in uneven torque distribution when the nut is under force, which can easily lead to loosening of the connection. Especially under complex working conditions such as vibration and impact, it is impossible to guarantee stable connection strength.
[0004] Three-point torque locking nut: Pressure is applied at three points on the end face of the nut, causing the first thread on the end face of the nut to deform and break. This increases the friction between the nut and the bolt, making it unusable.
[0005] Nylon lock nuts: Although they have a certain anti-loosening effect, nylon material is prone to aging and deformation in harsh environments such as high temperature and high humidity, which reduces locking performance. In addition, the coefficient of friction between nylon and metal is unstable, resulting in poor torque control accuracy.
[0006] It is evident that existing common locking nuts are prone to loosening under special working conditions such as vibration, high temperature, and high humidity, which affects the locking strength. Utility Model Content
[0007] The purpose of this application is to provide a hexagonal torque locking nut and fastener, so as to solve to some extent the technical problem that existing locking nuts are prone to loosening under special working conditions.
[0008] This application provides a hexagonal torque locking nut, comprising: a locking body, the locking body including an inner ring surface and an outer ring surface arranged coaxially;
[0009] The outer annular surface includes six opposite sides arranged in a ring in sequence. Each pair of opposite sides is arranged in a group, and the two opposite sides in each group are arranged opposite each other.
[0010] Each of the opposite sides is provided with a locking part, and the locking parts on the two opposite sides of each group are arranged opposite each other.
[0011] In the above technical solution, the locking part is formed by a partial indentation of the opposite side facing the inner ring surface, and the six locking parts are arranged in a centrally symmetrical manner.
[0012] In any of the above technical solutions, the inner ring surface is provided with an internal thread, and the locking body is provided with an external thread that is compatible with the internal thread.
[0013] In any of the above technical solutions, the internal thread further comprises a major diameter, a pitch diameter, and a minor diameter. A reduction portion is formed at the position of the internal thread in the region opposite to the locking portion. The major diameter of the reduction portion is smaller than the major diameter of the internal thread at other positions on the inner annular surface except for the reduction portion. The pitch diameter of the reduction portion is smaller than the pitch diameter of the internal thread at other positions on the inner annular surface except for the reduction portion. The minor diameter of the reduction portion is smaller than the minor diameter of the internal thread at other positions on the inner annular surface except for the reduction portion.
[0014] In any of the above technical solutions, the locking part is further described as a circular recess.
[0015] In any of the above technical solutions, the locking part is further defined as a rectangular recess.
[0016] In any of the above technical solutions, each of the opposite sides is provided with a recess, and the locking part is disposed in the recess.
[0017] In any of the above technical solutions, the hexagonal torque locking nut further includes a flange, the flange being disposed on the locking body, the flange having a through hole, the diameter of the through hole being not less than the diameter of the inner ring surface, and the through hole being coaxially disposed with the locking body.
[0018] In any of the above technical solutions, the diameter of the flange is further greater than the diameter of the locking body.
[0019] This application also provides a fastener, including the hexagonal torque locking nut described in any of the above technical solutions, and thus has all the beneficial technical effects of the hexagonal torque locking nut, which will not be repeated here.
[0020] Compared with the prior art, the beneficial effects of this application are as follows:
[0021] The hexagonal torque locking nut provided in this application includes: a locking body, which includes an inner ring surface and an outer ring surface arranged coaxially; the outer ring surface includes six opposite sides arranged in a ring, with each pair of opposite sides arranged in a group, and the two opposite sides in each group facing each other; each pair of opposite sides is provided with a locking part, and the locking parts on the two opposite sides in each group facing each other.
[0022] The hexagonal torque lock nut provided in this application, through structural optimization, adds a locking part to the locking body, reduces the assembly gap between it and the mating part, and increases the torque of the hexagonal torque lock nut, thereby improving the locking degree between the hexagonal torque lock nut and the mating part, and thus strengthening the anti-loosening effect of the hexagonal torque lock nut. It also has excellent locking performance under special working conditions.
[0023] The fasteners provided in this application include the hexagonal torque lock nut described above. Therefore, the hexagonal torque lock nut improves the locking effect under special working conditions and reduces the risk of the locking structure loosening. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of a hexagonal torque locking nut provided in an embodiment of this application;
[0026] Figure 2 A front view of a hexagonal torque lock nut provided in an embodiment of this application;
[0027] Figure 3 A top view of a hexagonal torque lock nut provided in an embodiment of this application;
[0028] Figure 4 A schematic diagram of another hexagonal torque locking nut provided in an embodiment of this application;
[0029] Figure 5 A front view of another hexagonal torque lock nut provided in an embodiment of this application.
[0030] Figure label:
[0031] 1-Locking body, 101-Inner ring surface, 102-Outer ring surface, 1021-Opposite side surface, 2-Locking part, 3-Flange. Detailed Implementation
[0032] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.
[0033] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.
[0034] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0036] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0037] The following reference Figures 1 to 5 The hexagonal torque lock nut and fastener described in the embodiments of this application are explained.
[0038] See Figures 1 to 5As shown, an embodiment of this application provides a hexagonal torque locking nut. The hexagonal torque locking nut includes a locking body 1, which is a cylindrical shape with open ends. The locking body 1 has an inner ring surface 101 and an outer ring surface 102, which are coaxially arranged. The inner ring surface 101 is used to connect with a matching component, which is specifically a bolt, screw, etc. used in conjunction with this hexagonal torque locking nut. The outer ring surface 102 is composed of six opposite sides 1021 connected end to end. The six outer ring surfaces 102 are centrally symmetrically arranged and divided into three groups of two. In each group, every two outer ring surfaces 102 are directly opposite each other. Each opposite side 1021 is provided with a locking part 2, for a total of six locking parts 2. The six locking parts 2 are centrally symmetrically arranged, and the locking parts 2 on each group of directly opposite opposite sides 1021 are directly opposite each other.
[0039] Specifically, the inner ring surface 101 of the locking body 1 is provided with an internal thread, and the outer surface of the clamp is provided with an external thread. The internal thread of the inner ring surface 101 is adapted to the external thread on the clamp, so that the clamp can be inserted into the locking body 1 and connected by the adapted thread.
[0040] Furthermore, the hexagonal torque locking nut also includes a flange 3, and the locking body 1 is disposed on the flange 3. Preferably, the locking body 1 and the flange 3 have an integral structure. A through hole is provided at the center of the flange 3. The through hole is coaxially disposed with the inner ring surface 101 of the locking body 1 and the two are connected to each other so as to allow the fitting to pass through.
[0041] The edge of flange 3 is a circular edge, and the outer diameter of flange 3 is larger than the outer diameter of locking body 1. Along the gradual tightening direction of the threaded connection between the hexagonal torque locking nut and the matching part, flange 3 is located at the front end of locking body 1. After the hexagonal torque locking nut and the matching part are connected in place, flange 3 can act as a pad to prevent excessive compression of the surrounding area by locking body 1 after the hexagonal torque locking nut and the matching part are locked together.
[0042] Furthermore, during the machining stage of this hexagonal torque locking nut, after the locking body 1 is machined, a tool is used to apply pressure to the six opposite faces 1021 simultaneously with the same force, so that locking parts 2 are generated on the six opposite faces 1021 at the same time. The locking parts 2 are specifically recesses formed by the opposite faces 1021 facing the inner ring surface 101, and the depth of the locking parts 2 is distributed radially along the locking body 1. The locking body 1 has a major diameter, a pitch diameter, and a minor diameter. The major diameter, also known as the outer diameter or nominal diameter, refers to the diameter of an imaginary cylinder that coincides with the crest of the external thread or the root of the internal thread. It is the main dimension of the thread and is used to describe the basic size of the thread. The pitch diameter refers to the diameter of an imaginary cylinder or cone whose generatrix passes through the point where the width of the groove and the ridge on the thread profile are equal. The minor diameter refers to the diameter of an imaginary cylinder or cone that is tangent to the root of the external thread or the crest of the internal thread. The function of the minor diameter is to prevent the nut from being threaded too deep and to prevent the screw strength from decreasing. If the minor diameter is too large or the groove on the circumference of the nut is too deep, it will lead to a decrease in the tightening force of the nut or even damage. It should be noted that the major diameter, pitch diameter, and minor diameter are the common names and structures of locking nuts in the industry. When the locking part 2 is pressed onto the locking body 1 using a tool, the locking part 2 is generated due to the change in the force on the opposite side 1021. A reduction part is formed at the position of the locking part 2 corresponding to the internal thread. Under the action of force, the major diameter, pitch diameter and minor diameter of the internal thread all shrink, making the major diameter at the position of the reduction part smaller than the major diameter at other positions of the internal thread except for the reduction part, the pitch diameter at the position of the reduction part smaller than the pitch diameter at other positions, and the minor diameter at the position of the reduction part smaller than the minor diameter at other positions. In addition, the minor diameter of the internal thread on the back of the six locking parts 2 shrinks at the same time. This makes the fit clearance between the locking part 2 and the matching part smaller during the assembly of the hexagonal torque locking nut and the matching part, and the torque of the hexagonal torque locking nut relative to the matching part increases, thereby strengthening the anti-loosening effect of the hexagonal torque locking nut and thus strengthening the locking effect of the hexagonal torque locking nut.
[0043] This hexagonal torque lock nut is sized to match that of a regular lock nut, and the locking part 2 is matched with different sizes on hexagonal torque lock nuts of different specifications. Preferably, taking an M14 hexagonal torque lock nut as an example, in one embodiment of this application, the locking part 2 is a circular recess. When the shape of the locking part 2 is a circular recess, the diameter of the locking part is 3.4mm. Preferably, the shape of the locking part 2 can also be a rectangular recess, in which case the long side of the locking part 2 is 3.4mm and the wide side is 2mm. Of course, the shape of the locking part is not limited to circular and rectangular, and can also be other shapes.
[0044] Furthermore, the shape of the locking body 1 can be similar to that of a common nut, with each opposite side surface 1021 being a plane. In this embodiment, preferably, each opposite side surface 1021 of the locking body 1 is provided with a recess, the length of which extends along the axial direction of the locking body 1. Each recess includes a first side wall and a second side wall facing each other, and a bottom wall located between the first side wall and the second side wall. Most of the locking part 2 is located on the bottom wall, and a small part extends to the first side wall and the second side wall. The first side wall, the second side wall, and the bottom wall transition naturally between adjacent sides. The opposite side surfaces 1021 are thinned to facilitate the processing to form the locking part 2.
[0045] In summary, the hexagonal torque locking nut provided in this application, through structural optimization, adds a locking part 2 to the locking body 1, reduces the assembly gap between it and the opposing part, increases the torque of the hexagonal torque locking nut, thereby improving the locking degree between the hexagonal torque locking nut and the opposing part, and thus strengthening the anti-loosening effect of the hexagonal torque locking nut. It also has excellent locking performance under special working conditions.
[0046] The embodiments of this application also provide a fastener, including the hexagonal torque locking nut described in any of the above embodiments, and thus have all the beneficial technical effects of the hexagonal torque locking nut, which will not be repeated here.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A hexagonal torque locking nut, characterized in that, include: A locking body, the locking body comprising an inner ring surface and an outer ring surface arranged coaxially; The outer annular surface includes six opposite sides arranged in a ring in sequence. Each pair of opposite sides is arranged in a group, and the two opposite sides in each group are arranged opposite each other. Each of the opposite sides is provided with a locking part, and the locking parts on the two opposite sides of each group are arranged opposite each other.
2. The hexagonal torque locking nut according to claim 1, characterized in that, The locking portion is formed by a partial indentation of the opposite side facing the inner annular surface, and the six locking portions are arranged in a centrally symmetrical manner.
3. The hexagonal torque locking nut according to claim 1, characterized in that, The inner ring surface is provided with an internal thread, and the locking body is provided with an external thread that is compatible with the internal thread.
4. The hexagonal torque locking nut according to claim 3, characterized in that, The internal thread has a major diameter, a pitch diameter, and a minor diameter. The position of the internal thread in the area opposite to the locking part forms a reduction section. The major diameter of the reduction section is smaller than the major diameter of the internal thread at other positions on the inner annular surface except for the reduction section. The pitch diameter of the reduction section is smaller than the pitch diameter of the internal thread at other positions on the inner annular surface except for the reduction section. The minor diameter of the reduction section is smaller than the minor diameter of the internal thread at other positions on the inner annular surface except for the reduction section.
5. The hexagonal torque locking nut according to claim 1, characterized in that, The locking part is a circular recess.
6. The hexagonal torque locking nut according to claim 1, characterized in that, The locking part is a rectangular recess.
7. The hexagonal torque lock nut according to claim 1, characterized in that, Each of the opposite sides is provided with a recess, and the locking part is disposed in the recess.
8. The hexagonal torque lock nut according to any one of claims 1 to 7, characterized in that, The hexagonal torque locking nut also includes a flange, which is disposed on the locking body. The flange has a through hole, the diameter of which is not less than the diameter of the inner ring surface, and the through hole is coaxially disposed with the locking body.
9. The hexagonal torque lock nut according to claim 8, characterized in that, The diameter of the flange is larger than the diameter of the locking body.
10. A fastener, characterized in that, Includes the hexagonal torque lock nut as described in any one of claims 1 to 9.