Lock nut

Abstract

The utility model discloses a kind of lock nuts, belong to mechanical parts technical field.The lock nut includes bottom nut, top nut rotationally installed in the top of bottom nut and locking assembly arranged in the inside of bottom nut.The locking assembly includes multiple limiting posts driven by spring, connecting ring for linkage limiting post synchronous movement and button for external operation.The bottom of top nut is provided with the limiting slot compatible with limiting post.Locking, spring pushes limiting post and forms mechanical locking by being clamped into limiting slot.The bottom of top nut is also provided with rubber damping pad, and forms frictional damping after being pressed tightly with bottom nut.When unlocking, press button can drive connecting ring to make all limiting posts synchronous and separate from limiting slot.The utility model realizes high-reliability anti-loose effect by the double effect of mechanical locking and frictional damping, simultaneously by button type unlocking structure, so that disassembly adjustment does not need tool, operation is convenient, and use efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical parts technology, and in particular to an anti-loosening nut. Background Technology

[0002] Nuts are widely used fasteners whose core function is to work with bolts or screws to secure two or more components together. However, during the operation of mechanical equipment, conditions such as vibration, impact, or alternating loads are unavoidable. These external factors cause the preload between the threaded pairs to gradually decrease, and the frictional force to drop accordingly. Ultimately, this may lead to the loosening or even detachment of the nut, posing a serious threat to the safe and stable operation of the equipment.

[0003] To address the problem of loose nuts, various anti-loosening solutions have been developed in existing technologies. For example, spring washers or locking washers are used to increase elasticity or friction to resist loosening; however, this method has limited effectiveness under severe vibration. Another common solution is to use double nuts (opposite nuts) for locking, increasing friction through the interaction force between the two nuts. While effective, this method requires a high tightening torque during installation, and improper operation can reduce its anti-loosening effect. Furthermore, adjustment and disassembly are relatively cumbersome.

[0004] To achieve more reliable anti-loosening effects, the industry has also developed anti-loosening nuts with mechanical locking structures. These nuts typically use pins, steel balls, or wedges to directly engage with the grooves of bolts or mating parts, creating a rigid lock. However, this type of structure often brings new problems. The locking mechanism can be quite complex, and some are designed for single use only, not for repeated disassembly and assembly. Even reusable types usually require specialized tools for unlocking, which is inconvenient, especially in confined spaces or emergency repair situations, significantly reducing work efficiency.

[0005] Therefore, this utility model proposes an anti-loosening nut to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of insufficient reliability due to the single anti-loosening structure in the existing anti-loosening nuts, and the inconvenience of disassembly and adjustment of some mechanical locking structures, this utility model aims to provide an anti-loosening nut with an improved structure that can effectively solve the above problems.

[0007] This utility model provides an anti-loosening nut, comprising: a bottom nut and a top nut rotatably mounted on the top of the bottom nut; and a locking component disposed inside the bottom nut.

[0008] The locking assembly includes multiple axially retractable limiting posts.

[0009] Furthermore, the bottom of the top nut is provided with a limiting groove that matches the limiting post. The locking assembly drives the limiting post to extend out of the bottom nut and engage in the limiting groove of the top nut through an elastic element, thereby forming a releasable mechanical locking relationship between the bottom nut and the top nut.

[0010] Preferably, the locking assembly specifically includes multiple springs, multiple guide rods, multiple limiting posts, a connecting ring, and a button. The springs provide elastic thrust, the guide rods guide the movement of the limiting posts, the connecting ring synchronizes the movement of all the limiting posts, and the button drives the connecting ring from the outside to achieve the unlocking action.

[0011] Preferably, the product name also includes a friction assembly disposed at the bottom of the top nut. Specifically, the friction assembly consists of multiple arc-shaped plates fixed to the bottom of the top nut, and a rubber damping pad is fixed to the bottom of each arc-shaped plate. This provides auxiliary anti-loosening frictional resistance when the top nut and the bottom nut are tightened, forming a dual anti-loosening effect of mechanical locking and frictional damping.

[0012] Preferably, the spring is sleeved on the outside of the guide rod, with one end abutting against the inner bottom surface of the bottom nut and the other end abutting against the bottom of the limiting post, providing a continuous and stable axial thrust to the limiting post.

[0013] Preferably, the bottom of the limiting post is fixedly connected to the top of the guide rod, and the two together form a guide locking unit that can be raised and lowered along the axis, ensuring the stability and accuracy of the limiting post during the extension and retraction process.

[0014] Preferably, the connecting ring is a ring structure that is fixedly connected to the middle or lower part of all the limiting posts, thereby evenly distributing the single unlocking action input by the button to each limiting post and ensuring synchronous unlocking of the locking mechanism.

[0015] Preferably, the side wall of the bottom nut has a groove for the button to slide. The button is fixedly connected to the connecting ring and extends through the groove to the outside of the bottom nut, making it convenient for the user to press to release the lock.

[0016] This utility model has the following beneficial effects: 1. In this utility model, by setting a dual anti-loosening structure of mechanical locking and friction damping, that is, by using a spring to push the limiting post into the limiting groove of the top nut to form a mechanical lock, and at the same time using the rubber damping pad at the bottom of the top nut to press against the bottom nut to generate friction, the problem of the single structure and insufficient anti-loosening reliability of the existing anti-loosening nut is solved, and the technical effect of dual locking and more stable and reliable connection is achieved.

[0017] 2. In this utility model, by setting a button that can be pressed from the outside, the button moves all the limit posts synchronously to disengage from the limit groove, which solves the problem that some mechanical locking nuts are difficult to disassemble and require special tools in the prior art. It achieves the technical effect of quick unlocking, convenient disassembly and adjustment without tools, and significantly improves the efficiency of installation and maintenance. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of an anti-loosening nut proposed in this utility model; Figure 2 This is a cross-sectional view of the bottom nut of an anti-loosening nut proposed in this utility model; Figure 3 This is a schematic diagram of the top nut of an anti-loosening nut proposed in this utility model.

[0019] Legend: 1. Bottom nut; 2. Top nut; 3. Arc plate; 4. Rubber damping pad; 5. Spring; 6. Guide rod; 7. Limiting post; 8. Button; 9. Connecting ring. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0021] Please refer to Figures 1 to 3 This utility model provides an anti-loosening nut, which aims to solve the problems of insufficient anti-loosening reliability and inconvenient disassembly and adjustment caused by the simple structure of the anti-loosening nut in the prior art.

[0022] like Figure 1 As shown, the anti-loosening nut includes a bottom nut 1 and a top nut 2 rotatably mounted on the top of the bottom nut 1. The bottom nut 1 serves as the main load-bearing body, and its interior contains a locking component for achieving mechanical locking. The top nut 2 cooperates with the bottom nut 1 to form a double anti-loosening structure.

[0023] like Figure 2 As shown, a sliding groove is provided on the side wall of the bottom nut 1, and multiple vertically arranged guide rods 6 are fixedly connected inside it. The guide rods 6 are used to guide the moving parts of the locking assembly. A connecting ring 9 is also slidably connected inside the bottom nut 1. The connecting ring 9 is used to link multiple moving parts in the locking assembly.

[0024] like Figure 3 As shown, the bottom of the top nut 2 is provided with multiple limiting grooves, which are used to form a snap-fit ​​with the limiting post 7 in the locking assembly. The bottom of the top nut 2 is also fixedly connected with four arc-shaped plates 3. The bottom of the arc-shaped plates 3 is fixed with rubber damping pads 4 by adhesive. The rubber damping pads 4 are used to provide frictional resistance when the top nut 2 and the bottom nut 1 are tightened.

[0025] The core structure of the locking assembly includes multiple springs 5, multiple limit posts 7, and a button 8. The springs 5 ​​are sleeved on the outside of the guide rod 6, and their top ends act on the bottom of the limit posts 7 to provide elastic thrust. The bottom of the limit posts 7 is fixedly connected to the top end of the guide rod 6, and its top end can extend through the top surface of the bottom nut 1 to reach into the limit groove of the top nut 2 to achieve mechanical limiting. The connecting ring 9 is fixedly connected to all the limit posts 7. The button 8 is fixedly connected to the connecting ring 9 and slides in the groove of the bottom nut 1. The button 8 is used to operate from the outside to control the unlocking action of the locking assembly.

[0026] To solve the above-mentioned technical problems, the anti-loosening nut forms a specific mechanical locking and unlocking relationship with the top nut 2 through a locking component set inside the bottom nut 1.

[0027] Please refer to the following carefully. Figure 2 and Figure 3 The locking assembly includes multiple springs 5, multiple guide rods 6, multiple limit pins 7, a button 8, and a connecting ring 9. These components work together to achieve reliable locking and convenient unlocking of the top nut 2.

[0028] The guide rod 6 is vertically fixed to the inner bottom surface of the bottom nut 1. Its function is to provide precise axial guidance for the extension and retraction of the spring 5 and the lifting and lowering of the limit post 7, and to prevent deflection or jamming during the movement.

[0029] Spring 5 is a helical compression spring, which is sleeved on the outside of guide rod 6. The bottom end of spring 5 is supported by the inner bottom surface of bottom nut 1, and its top end abuts against the bottom of limit post 7, so as to continuously apply an upward elastic thrust to limit post 7.

[0030] The bottom of the limiting post 7 is fixedly connected to the top of the guide rod 6 to form an integral lifting unit. The top of the limiting post 7 is designed to fit the limiting groove at the bottom of the top nut 2. Under the push of the spring 5, the top of the limiting post 7 can extend out of the top surface of the bottom nut 1.

[0031] The connecting ring 9 is a ring structure that is slidably disposed inside the bottom nut 1 and fixedly connected to the middle or lower part of all the limit posts 7 to ensure that all the limit posts 7 can rise and fall synchronously. A button 8 is fixedly connected to the outer wall of the connecting ring 9.

[0032] Button 8 extends through the groove in the side wall of bottom nut 1 and its fixed connection with connecting ring 9 allows the pressing force applied to button 8 to be directly transmitted to connecting ring 9, thereby driving all limit pins 7 to move downward synchronously. This sliding fit structure between button 8 and groove ensures the smoothness and reliability of unlocking operation.

[0033] Based on the above embodiments, the present invention may further include the following preferred technical solutions: In one specific embodiment, in order to enhance the frictional anti-loosening effect, four arc-shaped plates 3 are fixedly connected to the bottom of the top nut 2. These arc-shaped plates 3 are evenly distributed around the bottom surface of the top nut 2. Rubber damping pads 4 are fixed to the bottom of the arc-shaped plates 3 by adhesive. This structure allows the rubber damping pads 4 to be pressed against the top surface of the bottom nut 1 when the top nut 2 is tightened, thereby generating frictional resistance to assist in anti-loosening.

[0034] Furthermore, the spring 5 is installed such that its bottom end is directly supported by the inner bottom surface of the bottom nut 1, and its top end abuts against the bottom of the limiting post 7. This arrangement ensures that the spring 5 can stably apply a continuous axial thrust to the limiting post 7.

[0035] In order to achieve synchronous movement of all limit posts 7, the connecting ring 9 is fixedly connected to all limit posts 7. Through the integral structure of the connecting ring 9, a single unlocking action input by the button 8 can be evenly distributed and transmitted to each limit post 7, thereby ensuring that all limit posts 7 slide synchronously along the axial direction of the guide rod 6.

[0036] Working principle: During assembly and locking, first tighten the bottom nut 1 onto the bolt of the workpiece, and then tighten the top nut 2 toward the bottom nut 1. During this process, the arc plate 3 at the bottom of the top nut 2 drives the rubber damping pad 4 to contact and be pressed with the top surface of the bottom nut 1, generating an initial frictional damping force. As the top nut 2 continues to tighten, the limiting groove at its bottom aligns with the top of the limiting post 7. The spring 5, which is in a pre-compressed state, then releases its elastic force, pushing the limiting post 7 upward and locking it into the limiting groove. At this time, the mechanical limiting formed by the limiting post 7 and the limiting groove, as well as the frictional damping force generated by the rubber damping pad 4, together achieve a double anti-loosening lock for the nut.

[0037] During disassembly and unlocking, press the button 8 that extends out of the groove of the bottom nut 1. The button 8 causes the connecting ring 9 to slide downwards synchronously. All the limiting posts 7 fixed on the connecting ring 9 are pulled downwards synchronously and overcome the elastic force of the spring 5 to compress them further. When the top of the limiting post 7 is completely disengaged from the limiting groove of the top nut 2, the mechanical limit is released. At this time, keep the button 8 pressed and rotate the top nut 2 counterclockwise to disassemble it. After releasing the button 8, the elastic force of the spring 5 will push the limiting post 7 and the connecting ring 9 to automatically reset, preparing for the next use.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A locking nut, characterized in that, include: Bottom nut (1), the side wall of which is provided with a sliding groove, which accommodates the locking component; Top nut (2), which is rotatably mounted on the top of bottom nut (1), and the bottom of top nut (2) is provided with multiple limiting grooves; The locking component includes: Multiple springs (5) are disposed inside the bottom nut (1); Multiple guide rods (6) are vertically arranged inside the bottom nut (1); Multiple limiting posts (7), the bottom of each limiting post (7) is fixedly connected to the top of the corresponding guide rod (6), the top of the limiting post (7) extends through the top surface of the bottom nut (1), and the corresponding spring (5) is sleeved on the outside of the guide rod (6), and the elastic force of the spring (5) acts on the limiting post (7). Connecting ring (9), which is slidably disposed inside the bottom nut (1) and fixedly connected to all the limiting posts (7); Button (8), which is fixedly connected to the connecting ring (9) and slidably fitted in the groove of the bottom nut (1); Under the elastic force of the spring (5), the top end of the limiting post (7) is pushed to engage in the limiting groove of the top nut (2), thereby restricting the relative rotation between the top nut (2) and the bottom nut (1).

2. The anti-loosening nut according to claim 1, characterized in that, The bottom of the top nut (2) is fixedly connected to multiple arc-shaped plates (3).

3. The anti-loosening nut according to claim 2, characterized in that, A rubber damping pad (4) is fixed to the bottom of the arc plate (3).

4. The anti-loosening nut according to claim 3, characterized in that, The rubber damping pad (4) is fixed to the bottom of the arc plate (3) by adhesive.

5. The anti-loosening nut according to claim 2, characterized in that, The number of the arc-shaped plates (3) is four.

6. The anti-loosening nut according to claim 1, characterized in that, The top end of the spring (5) abuts against the bottom of the limiting post (7), and its bottom end is supported by the inner bottom surface of the bottom nut (1).

7. The anti-loosening nut according to claim 1, characterized in that, The connection ring (9) is designed so that all the limiting posts (7) slide synchronously along the axial direction of the guide rod (6) under the drive of the button (8).

8. The anti-loosening nut according to claim 1, characterized in that, When the button (8) is pressed, the connecting ring (9) causes all the limiting posts (7) to retract into the bottom nut (1) against the elastic force of the spring (5), so that the top of the limiting post (7) is completely disengaged from the limiting groove.

9. A locking nut according to claim 3, characterized in that, When the top nut (2) is tightened onto the bottom nut (1), the rubber damping pad (4) is pressed into contact with the top surface of the bottom nut (1) and generates frictional resistance.

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