A kind of alternative adhesive bonding and visual failure early warning lock washer

Abstract

The utility model provides a kind of alternative to replace viscose and visual failure early warning's lock washer, including a pair of lock washer, still including at least two plastic clamps, at least two recesses are evenly provided on each the lock washer, two the recesses of the lock washer axial adhesion and make corresponding position recess intercommunication, each the plastic clamp is simultaneously clamped in two lock washer mutually intercommunicating two recesses on it.The utility model evenly sets at least two plastic clamps between two lock washers, replaces the viscose adhesion between two lock washers by the mode of plastic clamp locking lock washer, to replace the use of traditional glue with mechanical fixed mode, prevent two lock washers from separating due to glue aging, and plastic clamp has the color identification different from lock washer, when lock washer loosens, two recesses intercommunication on it will be misaligned, so that plastic clamp is cut off, to facilitate the visual identification of staff.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening washers, specifically an anti-loosening washer that replaces adhesive bonding and provides a visual failure warning. Background Technology

[0002] An anti-loosening washer is a washer that prevents bolts from loosening. It consists of two washers: the outer one has radial teeth, and the inner one has a wedge-shaped surface. When assembled, the inner wedge-shaped surfaces face each other, and the outer radial teeth engage with the contact surfaces at both ends. When the connecting parts are vibrated and the bolts tend to loosen, only the inner oblique teeth of the two washers are allowed to move relative to each other, generating lifting tension, thereby achieving 100% locking. However, existing anti-loosening washers have the following drawbacks: 1. Anti-loosening washers need to be bonded together in pairs using an adhesive process. The adhesive curing time is relatively long, about 15-20 minutes, which seriously affects efficiency. In addition, although this process can meet the initial assembly requirements, the adhesive is easily affected by environmental factors and time accumulation during long-term storage and subsequent circulation, and will fail to cure. After the adhesive fails, the two anti-loosening washers that were originally bonded will lose their restraint and will easily separate under the action of external forces such as vibration and bumps during transportation. 2. In practical applications, even if the anti-loosening washer becomes loose, it cannot be directly identified by visual inspection because there are no obvious visual features. Utility Model Content

[0003] The purpose of this invention is to provide an anti-loosening washer that replaces adhesive bonding and provides a visual failure warning, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An anti-loosening washer that replaces adhesive bonding and provides visual failure warning includes a pair of anti-loosening washers and at least two plastic clamps. Each anti-loosening washer has at least two grooves evenly distributed on it. The two anti-loosening washers are axially attached and the grooves at corresponding positions are connected to each other. Each plastic clamp is simultaneously engaged in the two interconnected grooves on the two anti-loosening washers.

[0005] Preferably, the two opposite end faces of the anti-loosening washer are respectively provided with multiple toothed surfaces and multiple wedge-shaped surfaces, and the multiple toothed surfaces and multiple wedge-shaped surfaces are radially arranged on their respective planes, with the multiple wedge-shaped surfaces of the two anti-loosening washers fitting together.

[0006] Preferably, the groove has an integrally formed limiting part inside, the top surface of the limiting part is lower than the tooth surface, the bottom surface of the limiting part is lower than or equal to the wedge surface, and the limiting part is in contact with the plastic clamp.

[0007] Preferably, the plastic clamp consists of a main body, a bending part, and a sealing part. The two bending parts are symmetrically arranged at both ends of the main body, and the sealing part is fixedly arranged at one end of the bending part. The main body is simultaneously engaged in the interconnected grooves on the two anti-loosening washers and abuts against the side wall of the limiting part. The bending part and the sealing part are also engaged in the grooves and contact the limiting part.

[0008] Preferably, the width of the narrowest part in the horizontal direction of the blocking part is greater than or equal to the width of the widest part in the horizontal direction of the bending part.

[0009] Preferably, one end of the sealing part is provided with an extension part along the axial direction, one end of the extension part extends into the groove, and the side of the extension part contacts the inner sidewall of the limiting part.

[0010] Preferably, the maximum vertical distance between the two bent portions is less than the minimum vertical distance between the tooth surface of one anti-loosening washer and the tooth surface of the other anti-loosening washer.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention features at least two plastic clamps evenly spaced between two anti-loosening washers. These clamps lock the washers in place of adhesive, replacing traditional glue with mechanical fastening. This prevents the washers from separating due to glue aging. The plastic clamps have a different color marking than the washers. When a washer becomes loose, the two interconnected grooves on the clamp will misalign, shearing the clamp and allowing for visual identification by workers. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a side view of the present invention. Figure 4 This is a structural schematic diagram of one side of the anti-loosening washer of this utility model; Figure 5 This is a schematic diagram of the other side of the anti-loosening washer of this utility model; Figure 6 This is a schematic diagram of the main structure of the plastic clamp of this utility model.

[0013] In the diagram: 1. Anti-loosening washer; 11. Toothed surface; 12. Groove; 13. Limiting part; 14. Wedge-shaped surface; 2. Plastic clamp; 21. Main body; 22. Bending part; 23. Sealing part; 24. Extension part. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-6 This utility model provides an anti-loosening washer that replaces adhesive bonding and provides a visual failure warning. It includes a pair of anti-loosening washers 1 and at least two plastic clamps 2. Each anti-loosening washer 1 has at least two grooves 12 evenly distributed on it. The two anti-loosening washers 1 are axially attached and the grooves 12 at corresponding positions are connected to each other. Each plastic clamp 2 is simultaneously engaged in the two interconnected grooves 12 on the two anti-loosening washers 1.

[0016] Specifically, the working principle is to use mechanical plastic clamps 2 to lock instead of chemical bonding, and to use the color and fracture of the plastic clamps 2 as direct visual indicators of failure.

[0017] Please see Figures 1 to 3 The two anti-loosening washers 1 are structurally identical, typically made of spring steel or stainless steel stampings. At least two grooves 12 are evenly distributed on the circumference of each anti-loosening washer 1. These grooves 12 are typically radially extending, rectangular through-slots, symmetrically distributed on the anti-loosening washer 1. During pre-assembly, the two anti-loosening washers 1 are axially fitted and precisely aligned, so that their respective grooves 12 are axially interconnected, forming complete engaging channels that penetrate the sides of the pair of combined anti-loosening washers 1. Each plastic clamp 2 acts as an independent mechanical locking element, designed to simultaneously and tightly engage with both anti-loosening washers 1 in this interconnected pair. Within the through groove 12, two or more plastic clamps 2 work together to physically connect two independent anti-loosening washers 1 into a pre-assembled whole that cannot be freely separated. This connection method completely eliminates the adhesive process in the background technology, eliminates the restriction of glue curing time on production efficiency, and completely solves the problem of glue failure due to aging and environmental degradation, which leads to the accidental separation of anti-loosening washers 1 during storage and transportation. The plastic clamps 2 are usually injection molded from engineering plastics with high impact toughness, fatigue resistance and bright colors such as red, yellow or green, and the material properties need to be elastic and easy to shear, which lays the foundation for its subsequent visual warning function.

[0018] The two opposite end faces of the anti-loosening washer 1 are respectively provided with multiple toothed surfaces 11 and multiple wedge-shaped surfaces 14. The multiple toothed surfaces 11 and multiple wedge-shaped surfaces 14 are radial structures on their respective planes, and the multiple wedge-shaped surfaces 14 of the two anti-loosening washers 1 fit together.

[0019] Please see Figure 4 and Figure 5 These tooth surfaces 11 are typically fine, radially spaced with a slight inclination. They present a radial structure on their respective planes, with slightly convex tooth tips. When the anti-loosening washer 1 is assembled in a bolted connection, the tooth surface 11 on this side will bite into the lower surface of the bolt head or nut, or the upper surface of the connected parts, generating strong adhesion and anti-rotation resistance. On the opposite end face, multiple wedge-shaped surfaces 14 are provided. These wedge-shaped surfaces 14 also present a radial structure on their respective planes, but their tooth profiles are not aligned. The inclined face has a gentle slope on one side and is almost vertical on the other. During assembly, the multiple wedge-shaped surfaces 14 of the two anti-loosening washers 1 are in contact with each other, that is, the wedge-shaped surface 14 of one washer engages with the inclined surface of the wedge-shaped surface 14 of the other washer. When the bolt tends to loosen due to vibration, the wedge-shaped surfaces 14 of the two washers will slide relative to each other. This sliding will generate a lifting tension that radially expands the two anti-loosening washers 1 due to the action of the inclined surface, thereby generating continuous pressure between the bolt and the connected parts, counteracting the loosening torque and achieving the anti-loosening effect.

[0020] It should be noted that the wedge angle of the wedge surface 14 needs to be greater than the thread helix angle of the bolt. When it loosens, the two anti-loosening washers 1 move out of place. The lifting distance of the anti-loosening washer 1 is greater than the thread lifting distance. The anti-loosening washer 1 expands in the axial direction, which in turn increases the clamping force, so that it can be effectively locked.

[0021] The groove 12 has an integrally formed limiting part 13 inside. The top surface of the limiting part 13 is lower than the tooth surface 11, and the bottom surface of the limiting part 13 is lower than or equal to the wedge surface 14. The limiting part 13 is in contact with the plastic clamp 2.

[0022] Please see Figure 4 and Figure 5Inside the groove 12, a raised limiting part 13 is integrally formed through stamping or milling. This limiting part 13 is essentially a raised platform or boss in the center of the bottom surface of the groove 12. The top surface of the limiting part 13, that is, the side near the tooth surface 11, is machined so that its height is lower than the tooth tip height of the tooth surface 11 on the outer side of the anti-loosening washer 1. This ensures that when the washer is tightened with the bolt head or nut, it is the tooth surface 11 that bears the pressure and engages, while the top surface of the limiting part 13 does not contact the bolt head, avoiding interference and abnormal stress. At the same time, the bottom surface of the limiting part 13, that is, the side near the wedge-shaped surface 14, is designed to be lower than or equal to the tooth root height of the wedge-shaped surface 14. This allows the wedge-shaped surfaces 14 of the two washers to fit completely when they are mated, and the bottom surface of the limiting part 13 does not obstruct the tight contact of the wedge-shaped surfaces 14, ensuring the normal operation of the anti-loosening mechanism. Functionally, the side wall of the limiting part 13 contacts the corresponding part of the finally inserted plastic clamp 2. The limiting part 13 forms a pair of parallel inner surfaces inside the groove 12. These two inner surfaces form a tight fit with the sides of the main body 21 and the extension 24 of the plastic clamp 2, providing precise radial and circumferential positioning for the plastic clamp 2, preventing it from shaking in the groove 12, and effectively transferring the shear force borne by the plastic clamp 2 to the anti-loosening washer 1.

[0023] The plastic clamp 2 consists of a main body 21, a bending part 22, and a sealing part 23. Two bending parts 22 are symmetrically arranged at both ends of the main body 21. The sealing part 23 is fixedly arranged at one end of the bending part 22. The main body 21 is simultaneously engaged in the grooves 12 that are interconnected on the two anti-loosening washers 1 and abuts against the side wall of the limiting part 13. The bending part 22 and the sealing part 23 are also engaged in the grooves 12 and contact the limiting part 13. The width of the narrowest part of the sealing part 23 in the horizontal direction is greater than or equal to the width of the widest part of the bending part 22 in the horizontal direction. One end of the sealing part 23 is provided with an extension part 24 along the axial direction. One end of the extension part 24 extends into the groove 12, and the side of the extension part 24 contacts the inner side wall of the limiting part 13. The maximum vertical distance between the two bending parts 22 is less than the minimum vertical distance between the tooth surface 11 of one anti-loosening washer 1 and the tooth surface 11 of the other anti-loosening washer 1.

[0024] Please see Figures 4 to 6The plastic clamp 2 has an overall shape resembling a flat "U". Two bent portions 22 are symmetrically arranged at both ends of the main body 21. They bend approximately 90 degrees from both ends of the main body 21 to one side, forming an "L"-shaped hook structure. The sealing portion 23 is fixedly arranged at the free end of each bent portion 22. Its horizontal cross-sectional area is usually larger than that of the bent portion 22. The width of the narrowest part of the sealing portion 23 in the horizontal direction is designed to be greater than or equal to the width of the widest part of the bent portion 22 in the horizontal direction. This allows the sealing portion 23 to push open the slightly elastic metal edge at the entrance of the groove 12 when the plastic clamp 2 is pressed into the connecting groove 12 of the two anti-loosening washers 1 along its axial direction, that is, perpendicular to the plane of the anti-loosening washer 1. Once fully inserted, its wider head acts as an anti-loosening agent, making it difficult for it to fall out on its own. To further enhance the clamp's resistance to radial movement within the groove 12, one end of the sealing portion 23 is axially... An extension portion 24 is provided in a direction parallel to the axis of the washer. One end of the extension portion 24 extends deep into the interior of the groove 12 after assembly, and the side of the extension portion 24 is in close contact with the inner wall of the limiting portion 13 inside the groove 12, forming a surface contact fit. This greatly increases the shear resistance area and stability of the plastic clamp 2. The maximum vertical distance between the outer surfaces of the sealing portions 23 of the two bent portions 22, that is, the total height of the plastic clamp 2 in the direction parallel to the axis of the anti-loosening washer 1, is strictly designed to be less than the minimum vertical distance between the top of the tooth surface 11 of one anti-loosening washer 1 and the top of the tooth surface 11 of the other anti-loosening washer 1. This ensures that when the pair of anti-loosening washers 1 are fully tightened by the bolt, the sealing portions 23 of the two plastic clamps 2 will not contact or interfere with the bolt head or the surface of the connector. All the tightening force is borne by the tooth surface 11 of the anti-loosening washer 1. The plastic clamp 2 only serves as a connection and warning function and is not subject to axial compressive stress.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A type of anti-loosening washer that replaces adhesive bonding and provides visual failure warning, comprising a pair of anti-loosening washers (1), characterized in that, It also includes at least two plastic clamps (2), and each of the anti-loosening washers (1) has at least two grooves (12) evenly provided. The two anti-loosening washers (1) are axially attached and the grooves (12) at corresponding positions are connected to each other. Each of the plastic clamps (2) is simultaneously engaged in the two grooves (12) on the two anti-loosening washers (1) that are connected to each other.

2. The anti-loosening washer according to claim 1, which replaces adhesive bonding and provides visual failure warning, is characterized in that... The anti-loosening washer (1) has multiple toothed surfaces (11) and multiple wedge-shaped surfaces (14) on its two opposite end faces. The multiple toothed surfaces (11) and multiple wedge-shaped surfaces (14) are radial structures on their respective planes. The multiple wedge-shaped surfaces (14) of the two anti-loosening washers (1) fit together.

3. The anti-loosening washer according to claim 2, which replaces adhesive bonding and provides visual failure warning, is characterized in that... The groove (12) has an integrally formed limiting part (13) inside. The top surface of the limiting part (13) is lower than the tooth surface (11), and the bottom surface of the limiting part (13) is lower than or equal to the wedge surface (14). The limiting part (13) is in contact with the plastic clamp (2).

4. The anti-loosening washer according to claim 3, which replaces adhesive bonding and provides visual failure warning, is characterized in that... The plastic clamp (2) consists of a main body (21), a bending part (22) and a sealing part (23). The two bending parts (22) are symmetrically arranged at both ends of the main body (21). The sealing part (23) is fixedly arranged at one end of the bending part (22). The main body (21) is simultaneously engaged in the grooves (12) that are interconnected on the two anti-loosening washers (1) and abuts against the side wall of the limiting part (13). The bending part (22) and the sealing part (23) are also engaged in the grooves (12) and contact the limiting part (13).

5. The anti-loosening washer according to claim 4, which replaces adhesive bonding and provides visual failure warning, is characterized in that... The width of the narrowest part of the blocking part (23) in the horizontal direction is greater than or equal to the width of the widest part of the bending part (22) in the horizontal direction.

6. The anti-loosening washer according to claim 4, which replaces adhesive bonding and provides visual failure warning, is characterized in that... One end of the sealing part (23) is provided with an extension part (24) along the axial direction. One end of the extension part (24) extends into the groove (12), and the side of the extension part (24) contacts the inner wall of the limiting part (13).

7. The anti-loosening washer according to claim 4, which replaces adhesive bonding and provides visual failure warning, is characterized in that... The maximum vertical distance between the two bent portions (22) is less than the minimum vertical distance between the tooth surface (11) of one anti-loosening washer (1) and the tooth surface (11) of the other anti-loosening washer (1).

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