Anti-loosening locking nut
By creating inner ring grooves and segmented grooves on the nut body and configuring fasteners, the problems of stability, locking, stability, safety, and technical application of traditional nuts are solved. This addresses specific problems that have not been effectively solved in existing technologies, as well as the technical challenges or requirements after nut connection.
Patent Information
- Application Number
- CN202520245740.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-17
AI Technical Summary
Traditional nuts are prone to loosening and slippage under complex torsional and shear loads, leading to unstable component connections and posing safety hazards.
An inner ring groove and segmented grooves are made on the nut body, and fasteners are installed. When the fasteners are tightened, they generate axial compressive force, which causes deformation of the inner ring circumference of the nut, thereby enhancing the locking effect.
It improves the locking and stability of the nut, prevents loosening and backing, and ensures the stability and safety of the connection.
Smart Images
Figure CN223609078U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to engineering machinery technical field relates to a fastener, concretely relates to a locking nut of preventing loosening. BACKGROUND
[0002] The nut can also be called a cap nut, and its main function is to fasten and connect. By cooperating with a bolt or a screw, the nut can realize the fixation and connection between two or more components, and ensure the integrity and stability of the equipment. The nut plays a key role in the field of mechanical manufacturing, and can improve the stability and reliability of mechanical equipment. In the field of automobile manufacturing, the nut is widely used to fasten the external structural parts of the automobile, such as wheels and engine components, to ensure the integrity and safety of the automobile structure.
[0003] Due to insufficient initial tightening torque or the influence of environmental vibration, the traditional nut often reverses and other phenomena occur under complex torsional and shearing loads, which leads to loosening of the connection between components and causes safety hazards.
[0004] In order to solve the problem of nut connection, a kind of stop nut with good fastening effect and not falling off appears on the market. The stop nut is provided with 2 to 3 clamping pieces at one end. When the bolt passes through the nut and comes out from the clamping pieces, the clamping pieces are deformed and clamped between the adjacent threads on the bolt to achieve the effect of clamping and stopping. Since the clamping pieces are fixed on the nut, the clamping pieces are difficult to restore once deformed, so the nut can only be used once and cannot be reused.
[0005] The above information disclosed in the background is only used to increase the understanding of the background of the present application, and therefore, it can include prior art known by those skilled in the art. SUMMARY
[0006] The utility model discloses in view of above-mentioned problem in prior art, proposes a kind of lock nut of preventing loosening, to solve the loosening, reverse problem after nut connection.
[0007] To solve the above technical problems, the utility model adopts the following technical solutions:
[0008] A kind of lock nut of preventing loosening, comprising:
[0009] The nut body has an inner circumferential side, an outer circumferential side, and first and second end faces opposite to each other, and a threaded hole extending axially is formed on the first end face;
[0010] An inner ring groove is continuously or intermittently formed on the inner circumferential side of the nut body and extends radially towards the outer circumferential side, and terminates before reaching the outer circumferential side.
[0011] a fastener threadedly connected in the threaded hole on the nut body;
[0012] a segmented groove formed on the first end face of the nut body and located on opposite sides of the fastener; the segmented groove extends from the inner circumferential side of the nut body to the outer circumferential side and the axial depth terminates at the inner ring groove.
[0013] In some embodiments of the present application, in order to simplify the processing process and improve the deformation effect, the inner ring groove can be formed in a circle on the inner circumferential side of the nut body.
[0014] In some embodiments of the present application, the radial depth of the inner ring groove can be configured to be between 1 / 2 and 2 / 3 of the width of the first end face of the nut body to ensure strength.
[0015] In some embodiments of the present application, an internal thread is formed on the inner circumferential side of the nut body, and the inner ring groove separates the internal thread into two parts, wherein the first part of the internal thread is adjacent to the first end face of the nut body, and the second part of the internal thread is adjacent to the second end face of the nut body, and the number of threads of the first part of the internal thread is less than that of the second part of the internal thread to ensure the fastening and reliability of the threaded connection between the nut and its mating part.
[0016] In some embodiments of the present application, the axial height of the inner ring groove can be configured to be greater than 2 times the pitch of the internal thread to ensure that the nut has sufficient deformation allowance and improve the locking effect.
[0017] In some embodiments of the present application, multiple fasteners can be configured on the nut, and a segmented groove adjacent to each fastener can be formed on opposite sides of each fastener, thereby deforming multiple positions on the nut to enhance the anti-loose and anti-backout effect of the nut.
[0018] In some embodiments of the present application, multiple fasteners can be configured to be equally spaced in the circumferential direction on the first end face of the nut body, so that the deformation positions are uniformly distributed on the nut to further improve the locking effect of the nut.
[0019] In some embodiments of the present application, in order to improve the reliability of the nut, the nut body can be made of alloy structural steel which is easy to deform and not easy to break.
[0020] In some embodiments of the present application, the nut body can be designed as a common hexagonal nut, and the fastener can be selected as a common internal hexagonal bolt to facilitate the selection of appropriate operating tools.
[0021] In some embodiments of the application, a circular ring mounting surface can be formed on the second end surface of the nut body, the inner ring of the circular ring mounting surface is aligned with the inner ring circumferential surface of the nut body, and the outer ring radius of the circular ring mounting surface is less than or equal to the inscribed circle radius of the hexagonal outer ring circumferential surface of the nut body, and is transitioned to the outer ring circumferential surface of the nut body through an outwardly extending inclined surface, so that a gap is formed between the outer ring circumferential surface of the nut body and the cooperating part to facilitate the clamping and force application of the operating tool on the outer ring circumferential surface of the nut body. The threaded hole can pass through the first end surface of the nut body to the circular ring mounting surface to facilitate the machining of the threaded hole and the selection of the inner hexagonal bolt.
[0022] Compared with the prior art, the advantages and positive effects of the utility model mainly lie in:
[0023] 1. The inner ring groove and the segmented groove are formed in the nut body, the area divided by the inner ring groove and the segmented groove is more prone to deformation than other areas of the nut body, the fastener such as a bolt is arranged in the easy-to-deform area, and when the fastener is tightened, axial extrusion force is generated between the internal thread of the nut body and the external thread of the cooperating part, thereby reducing the thread gap and achieving the locking effect of the nut.
[0024] 2. The fastener is additionally arranged on the nut body, which can achieve another fixing effect in addition to the connection of the nut body, and through double fixing, the stability and fastening of the connection between two or more components can be improved.
[0025] 3. The fastener is arranged to increase the friction resistance of the nut body rotation, thereby preventing the nut from loosening and reversing under complex torsional and shearing load after connection, and achieving the locking effect.
[0026] 4. The anti-loosening locking nut can be made of alloy structural steel and other materials that are prone to deformation but not prone to brittle fracture, is simple to form, low in cost, and convenient to popularize and apply in the mechanical manufacturing field.
[0027] Other features and advantages of the utility model will become more apparent after reading the specific implementation manner of the utility model in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creating creative labor on the premise of the drawings.
[0029] Figure 1 is an embodiment of the anti-loose locking nut shown in the overall structure schematic diagram of the utility model;
[0030] Figure 2 is Figure 1 is an embodiment of the anti-loose locking nut shown in the rear view;
[0031] Figure 3 is Figure 1 is an embodiment of the anti-loose locking nut and the cooperating piece connection shown in the axonometric view;
[0032] Figure 4 is Figure 3 is the A-A cross-sectional structure diagram.
[0033] In the figure, 100, nut body; 110, inner ring circumferential side; 111, internal thread; 112, first part internal thread 113, second part internal thread; 114, inner ring groove; 120, outer ring circumferential side; 130, first end face; 131, threaded hole; 132, segmented groove; 133, easy deformation area; 140, second end face; 141, mounting surface; 142, inclined surface; 150, through hole; 200, fastener; 300, component; 400, cooperating piece; 410, end. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0035] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed or operated in a particular orientation, therefore, it cannot be understood as the limitation of the utility model.
[0036] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integral molding, or the communication inside component. For the person skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances. In the description of the embodiment, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable way.
[0037] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features.
[0038] In the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more than two.
[0039] Referring to Figure 1 、 Figure 2 The nut of the embodiment can be designed as a conventional polygonal structure, for example, a hexagonal nut as shown in Figure 1 , to facilitate the installation and disassembly operation of the nut by the operation tool matched therewith.
[0040] The nut of the embodiment has a nut body 100, and a circular through hole 150 is formed in the middle of the nut body 100, so that the nut body 100 forms an annular structure, that is, has a circular inner annular side surface 110 and a polygonal outer annular side surface 120.
[0041] Among them, a plurality of inner threads 111 are formed on the inner annular side surface 110, to be threadedly connected with a cooperating piece (for example, a screw, a bolt or other parts with external threads), to realize the connection and fixation between two or more parts. The outer annular side surface 120 forms a polygonal structure, such as a hexagonal structure as shown in Figure 1 , to facilitate the clamping of the wrench and other operation tools, and the nut body 100 is installed on or removed from the cooperating piece by rotating.
[0042] In addition, the nut body 100 of the embodiment also has an axis direction position relative to two end surfaces, which can be defined as a first end surface 130 and a second end surface 140 respectively, in combination with Figure 1 、 Figure 2As shown in the figure, the inner circumferential side surface 110 and the outer circumferential side surface 120 are between the two end surfaces 130, 140, and are perpendicular to the two end surfaces 130, 140, respectively. When the nut is threadedly connected with its mating member, first, the second end surface 40 of the nut body 100 is directed towards the mating member, then the mating member is inserted into the through hole 150 of the nut body 100, and the nut body 100 is rotated to achieve the connection and fixation between the nut body 100 and the mating member by the cooperation between the internal thread 111 on the nut body 100 and the external thread on the mating member.
[0043] In order to make the nut of the present embodiment have the functions of anti-loosening and retreat prevention, first, a plurality of threaded holes 131 are formed on the first end surface 130 of the nut body 100, the threaded holes 131 extend along the axial direction of the nut body 100, and can penetrate the second end surface 140 of the nut body 100 or terminate at a position close to the second end surface 140, for mounting the fastener 200.
[0044] In some embodiments, the threaded holes 131 are preferably formed in multiple numbers, and are arranged equidistantly along the circumferential direction on the first end surface 130 of the nut body 100. One fastener 200 is respectively mounted in each threaded hole 131, so that the fasteners 200 are uniformly distributed on the first end surface 130 of the nut body 100.
[0045] As a specific embodiment, as shown in the figure, Figure 1 four fasteners 200 can be mounted on the first end surface 130 of the nut body 100, and the central angle between two adjacent fasteners 200 is 90°. In some embodiments, the fastener 200 can be a connecting member with external thread, such as a screw or a bolt, for example, Figure 1 as shown in the figure, a hexagonal bolt, which can be threadedly connected in the threaded hole 131 by using the existing hexagonal wrench.
[0046] Secondly, an inner ring groove 114 is formed on the inner circumferential side surface 110 of the nut body 100, as shown in the figure, Figure 1 , Figure 2 The inner ring groove 114 can be formed in a circle on the inner circumferential side surface 110 of the nut body 100, or only a plurality of segments are formed on the inner circumferential side surface 110 of the nut body 100 for the arrangement position of the fastener 200. The inner ring groove 114 extends radially from the inner circumferential side surface 110 of the nut body 100 to the outer circumferential side surface 120, and in combination with Figure 4 as shown in the figure, the radial depth of the inner ring groove 114 exceeds the formation position of the threaded hole 131 and terminates before reaching the outer circumferential side surface 120.
[0047] On the first end surface 130 of the nut body 100, a segmented groove 132 is formed on the opposite side of each fastener 200, as shown in the figure,Figure 1 Each of the segment grooves 132 extends from the inner peripheral side 110 of the nut body 100 to the outer peripheral side 120 of the nut body 100 and terminates at the inner ring groove 114. In this way, a plurality of deformable regions 133 are formed on the nut body 100, each of which is divided by two segment grooves 132 and one inner ring groove 114. The threaded hole 131 and the fastener 200 are arranged in the deformable region 133 and extend through the inner ring groove 114 to the second end face 140 of the nut body 100. When the fastener 200 is tightened, the fastener 200 exerts a downward extrusion force on the first end face 130 of the nut body 100, forcing a portion of the first end face 130 in the deformable region 133 to move towards the inner ring groove 114, thereby deforming the inner peripheral side 110 of the nut body 100 to prevent the nut from loosening.
[0048] In some embodiments, in order to facilitate the deformation of the deformable region 133 on the nut body 100 under the extrusion force of the fastener 200, the nut body 100 can be made of a material that is deformable but not brittle, such as a metal material such as alloy structural steel, to meet the design requirements.
[0049] While achieving the deformation anti-loosening effect on the nut body 100, in order to ensure that the nut has sufficient connection strength, the present embodiment is particularly designed for the opening position and opening depth of the inner ring groove 114.
[0050] Specifically, the inner ring groove 114 can be arranged on the inner peripheral side 110 closer to the first end face 130 and farther from the second end face 140. That is, the inner thread 111 arranged on the inner peripheral side 110 is divided into upper and lower parts by the inner ring groove 114, as shown in Figure 2 Among them, the first part of the inner thread 112 is adjacent to the first end face 130, the second part of the inner thread 113 is adjacent to the second end face 140, and the number of turns of the first part of the inner thread 112 is significantly less than the number of turns of the second part of the inner thread 113.
[0051] In some embodiments, the first part of the inner thread 112 can be arranged only 2 to 3 turns, which meets the locking requirements. The second part of the inner thread 113 can be arranged more than 10 turns to ensure the stability of the threaded connection between the nut and the mating member.
[0052] In order to prevent the portion of the first end face 130 in the deformable region 133 from breaking off the nut body 100 when deformed, the radial opening depth of the inner ring groove 114 cannot be too close to the outer peripheral side 120 of the nut body 100. In some embodiments, as shown in Figure 4As shown, the radial depth of the inner ring groove 114 can be configured to be between 1 / 2 and 2 / 3 of the width of the first end face 130 of the nut body 100 to ensure sufficient connection strength.
[0053] In addition, in some embodiments, the axial height h of the inner ring groove 114 can be configured to be 2-3 times the pitch of the internal thread 111, as shown in Figure 2 to ensure that the easy-to-deform area 133 can have sufficient deformation allowance, thereby improving the locking effect of the nut.
[0054] In order to facilitate the tightening and assembly of the nut on the mating part, the second end face 140 of the nut body 100 is structurally designed in this embodiment, in combination Figure 2 , Figure 4 , an installation face 141 protruding from the outer ring circumferential surface 120 is formed thereon, which is used to contact the component 300 to be connected and fixed, so as to facilitate the tightening operation of the nut by using a wrench or the like tool.
[0055] In some embodiments, the installation face 141 can be designed as a circular ring, as shown in Figure 2 The inner ring diameter of the circular ring-shaped installation face 141 is equal to the inner ring diameter of the nut body 100, and the inner ring of the circular ring-shaped installation face 141 is aligned with the inner ring circumferential surface 110 of the nut body 100. The outer ring diameter of the circular ring-shaped installation face 141 is less than or equal to the diameter of the inscribed circle of the polygonal outer ring circumferential surface 110 of the nut body 100, and the outer ring of the circular ring-shaped installation face 141 is smoothly transitioned to the outer ring circumferential surface 110 of the nut body 100 through the inclined surface 142, as shown in Figure 4 The inclined surface 142 is inclined outward from the outer ring of the circular ring-shaped installation face 141 to the outer ring circumferential surface 110 of the nut body 100. Since the circular ring-shaped installation face 141 protrudes from the outer ring circumferential surface 110 of the nut body 100 in the axial direction of the nut, when the nut is tightened on the component 300 to be connected and fixed, the inclined surface 142 can form a gap between the outer ring circumferential surface 110 of the nut body 100 and the component 300, thereby facilitating the application of force by the operating tool.
[0056] For the case where the threaded hole 131 is formed through the first end face 130 to the second end face 140 of the nut body 100, the threaded hole 131 can be configured to pass through the circular ring-shaped installation face 141, so as to maximize the axial depth of the threaded hole 131 and facilitate the selection of the fastener 200.
[0057] In the selection of the fastener 200, the length of the fastener 200 installed in the threaded hole 131 should at least extend from the first end surface 130 of the nut body 100 through the inner ring groove 114 to the direction of the second end surface 140, so as to ensure that the extrusion force of the fastener 200 on the first end surface 130 can force the easily deformable area 133 of the first end surface 130 to effectively deform and reliably maintain when the fastener 200 is tightened, so as to ensure that the nut can maintain its locking and retreat-preventing effect after being threadedly connected with the cooperating member 400.
[0058] Industrial applicability
[0059] In some application scenarios in which a pipe is required to be installed on a fixed component, as shown in Figure 3 、 Figure 4 , the end of the pipe is usually provided with external threads, which can be used as the cooperating member 400 of the nut, and the pipe can be installed and fixed on the component 300 by being threadedly connected with the nut.
[0060] The specific installation process is as follows:
[0061] First, the end 410 of the pipe provided with external threads is inserted through the assembly hole provided on the component 300 and exposed.
[0062] Then, the end 410 of the pipe is inserted into the through hole 150 of the nut body 100, and the second end surface 140 of the nut body 100 is directed towards the component 300.
[0063] The nut body 100 is rotated to realize the connection and assembly of the nut body 100 on the pipe by the cooperation between the internal threads 111 of the nut body 100 and the external threads on the pipe.
[0064] When the nut body 100 is rotated to be pressed against the component 300 by the second end surface 140 thereof, the pipe is fixedly installed on the component 300.
[0065] Then, the fastener 200 on the nut is tightened to apply an extrusion force of the fastener 200 on the first end surface 130 of the nut body 100, so that the first end surface 130 is deformed in the easily deformable area 133 and is offset towards the inner ring groove 114, thereby reducing the thread gap between the internal threads 111 of the nut body 100 and the external threads on the pipe and realizing the locking effect of the nut.
[0066] Since the first end surface 130 of the nut body 100 is uniformly provided with a plurality of easily deformable areas 133, the fastener 200 in each easily deformable area 133 is tightened, so that locking points are formed at a plurality of positions in the circumferential direction of the nut. The plurality of locking points are uniformly distributed and locked on the end 410 of the pipe, for example Figure 3It is shown that the locking is carried out at the upper, lower, left and right four-point positions of the pipe, so that even if the pipe or the component 300 is vibrated or twisted during the later work, the nut will not be loose or retreated, thereby ensuring the stable assembly of the pipe on the component 300.
[0067] When it is needed to remove the pipe from the component 300, the fastener 200 on the nut is first loosened to release the locking between the nut and the pipe. Then, the nut body 100 is reversely rotated to remove the nut from the pipe. After that, the pipe can be taken out from the assembly hole of the component 300, and the pipe is removed from the component 300.
[0068] The nut of the embodiment has simple structure, convenient use and good anti-loose and anti-retreat effects.
[0069] Of course, the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.
Claims
1. A lock nut for preventing loosening, characterized by comprising: Comprising: a nut body having an inner circumferential side, an outer circumferential side, and opposite first and second end faces, an axially extending threaded hole being formed in the first end face; an inner circumferential groove continuously or discontinuously formed in the inner circumferential side of the nut body and extending radially toward the outer circumferential side and terminating before reaching the outer circumferential side; a fastener threadedly connected in the threaded hole of the nut body; a segmented groove formed in the first end face of the nut body and located on opposite sides of the fastener, the segmented groove extending from the inner circumferential side to the outer circumferential side of the nut body and terminating axially at the inner circumferential groove.
2. A lock nut according to claim 1, wherein The inner circumferential groove forms a ring on the inner circumferential side of the nut body.
3. A lock nut according to claim 2, wherein The radial depth of the inner circumferential groove is between 1 / 2 and 2 / 3 of the width of the first end face of the nut body.
4. The lock nut of claim 2, wherein: An internal thread is formed in the inner circumferential side of the nut body, the inner circumferential groove separates the internal thread into two parts, wherein the first part of the internal thread is adjacent to the first end face of the nut body, the second part of the internal thread is adjacent to the second end face of the nut body, the number of threads of the first part of the internal thread is less than that of the second part of the internal thread.
5. The lock nut of claim 4, wherein: The axial height of the inner circumferential groove is greater than 2 times the pitch of the internal thread.
6. The lock nut of claim 1, wherein The fastener is configured with multiple, each fastener has a segmented groove formed on opposite sides adjacent to the fastener.
7. The lock nut of claim 6, wherein Multiple fasteners are equally spaced in the circumferential direction on the first end face of the nut body.
8. The lock nut of claim 1, wherein The nut body is made of alloy structural steel.
9. The lock nut according to any one of claims 1 to 8, wherein: the nut body is a hexagonal nut; the fastener is an internal hexagonal bolt.
10. The lock nut according to claim 9, wherein: a circular annular mounting surface is formed on the second end face of the nut body, the inner ring of the circular annular mounting surface is aligned with the inner circumferential side of the nut body, the outer ring radius of the circular annular mounting surface is less than or equal to the inscribed circle radius of the hexagonal outer circumferential side of the nut body, and the outer annular mounting surface transitions to the outer circumferential side of the nut body through an outwardly extending inclined surface; the threaded hole penetrates from the first end face of the nut body to the circular annular mounting surface.