Tooth-shaped counteractive geometric self-locking lock washer

Abstract

The tooth-shaped counteractive geometric self-locking lock washer comprises a washer body, the washer body is formed by combining an upper-layer washer body and a bottom-layer washer body, a mounting groove used for mounting the upper-layer washer body is formed in the front face of the bottom-layer washer body, the upper-layer washer body is mounted in the mounting groove, and the lower-layer washer body is mounted in the mounting groove. And gradient tooth surfaces are arranged on the inner bottom surface of the mounting groove and the contact surface of the upper-layer gasket. The utility model relates to the technical field of fasteners, in particular to a gasket capable of providing circumferential counter-acting force to replace counter-acting force provided by force arm support during traditional fixed-torque fastening when a part is fastened in a fixed-torque mode, so that unbalance loading is eliminated, the purpose of improving axial force precision during fastening is achieved, and geometric self-locking between two layers of gaskets is achieved after fastening is completed. The tooth-shaped counteractive geometric self-locking lock washer has good self-locking performance and can keep a stable locking effect under various working conditions, so that the connection safety is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a tooth-shaped reaction geometric self-locking anti-loosening washer. Background Art

[0002] Threaded fasteners—bolts, studs, nuts, and washers—are well-known and used in traditional bolted connection applications. However, in mechanical connections, bolts and nuts often loosen due to vibration or load fluctuations, leading to equipment failure and safety hazards. This loosening problem is common in many applications, including petrochemicals, power generation, steel, heavy machinery, aerospace, and automotive. Existing anti-loosening devices primarily include spring washers, lock nuts, and adhesives, but these still pose a risk of failure under certain conditions.

[0003] Existing anti-loosening devices are mostly spring washers or locking nuts. Although spring washers can provide a certain pre-tightening force, their effect will be weakened in high-frequency vibration environments and they cannot effectively prevent loosening. Although locking nuts are designed to improve the locking effect, they may still loosen due to material fatigue or lubrication failure in extreme temperature, humidity or temperature and pressure fluctuation environments. In addition, although adhesives provide a certain fixing effect, they will cause additional trouble when disassembly and maintenance are required. Therefore, to address the existing problems, we urgently need a new type of anti-loosening washer. Utility Model Content

[0004] In view of the above situation, in order to overcome the current technical defects, the utility model provides an easy-to-use toothed reaction geometric self-locking anti-loosening washer. This anti-loosening washer can provide good self-locking performance when tightening parts, and can maintain a stable locking effect under various working conditions. By adopting a toothed reaction geometric design, it can automatically enhance the locking force under the action of external force, improve the bolt axial force accuracy, and play an anti-loosening effect after tightening is completed, thereby significantly improving the safety and reliability of the connection.

[0005] The technical solution adopted by the present invention is as follows: The tooth-shaped reaction geometric self-locking anti-loosening washer proposed in this solution includes a washer body, which is composed of an upper washer and a bottom washer. The front of the bottom washer is provided with an installation groove for installing the upper washer. The upper washer is installed in the installation groove. The bottom surface of the installation groove and the contact surface of the upper washer are both provided with gradient tooth surfaces. The gradient tooth surfaces can improve the tightness of the installation of the upper washer and the bottom washer.

[0006] Furthermore, a tooth-shaped structure adapted to the driving sleeve is provided on the periphery of the bottom gasket, and the tooth-shaped structure is evenly and symmetrically distributed on the periphery of the bottom gasket.

[0007] Furthermore, the back of the bottom washer is provided with a knurled contact surface, and the front of the upper washer is provided with a knurled anti-slip surface that contacts the nut.

[0008] The beneficial effects achieved by the utility model using the above structure are as follows: the utility model is a tooth-shaped reaction geometric self-locking anti-loosening washer, which has the following advantages: the tooth-shaped reaction geometric self-locking anti-loosening washer is composed of an upper washer and a bottom washer, and the anti-slip tightness of the upper washer and the bottom washer can be improved by setting the installation groove and the gradient tooth surface contact surface. When the bolt is tightened, the tooth-shaped structure evenly and symmetrically distributed on the periphery of the bottom washer is adapted to the drive sleeve to provide a circumferential reaction force when tightening the nut with a fixed torque, thereby improving the axial force accuracy during tightening. After installation, since the angle (α) of the gradient tooth-shaped structure of the tooth-shaped reaction geometric self-locking anti-loosening washer is greater than the rising angle (β) of the bolt thread, it can form geometric self-locking, further ensuring that the bolt does not loosen, thereby achieving the effect of improving the axial force accuracy of the bolt during tightening, and can also play an anti-loosening effect after the tightening is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0010] Figure 1 This is a schematic diagram of the front structure of the bottom gasket of the utility model;

[0011] Figure 2 This is a schematic diagram of the reverse structure of the bottom gasket of the present utility model;

[0012] Figure 3 This is a schematic diagram of the front structure of the upper gasket of the present utility model;

[0013] Figure 4 This is a schematic diagram of the back structure of the upper gasket of the present invention;

[0014] Figure 5 A schematic diagram of the planed surface structure of the bottom gasket and the upper gasket of the utility model;

[0015] Figure 6 This is a schematic diagram of the installation of the present utility model.

[0016] Among them, 1. upper gasket, 2. bottom gasket, 3. mounting groove, 4. gradient tooth surface, 5. tooth structure, 6. knurled contact surface, 7. knurled anti-slip surface. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] like Figure 1 — Figure 5 As shown, the technical solution adopted by the present invention is as follows: the toothed reaction geometric self-locking anti-loosening washer proposed in this solution includes a washer body, which is composed of an upper washer 1 and a bottom washer 2. The front of the bottom washer 2 is provided with a mounting groove 3 for installing the upper washer 1, and the upper washer 1 is installed in the mounting groove 3. The bottom surface of the mounting groove 3 and the contact surface of the upper washer 1 are both provided with gradient tooth surfaces 4. The gradient tooth surfaces 4 can improve the tightness of the installation of the upper washer 1 and the bottom washer 2. The outer periphery of the bottom washer 2 is provided with a toothed structure 5 that is compatible with the drive sleeve. The toothed structures 5 are evenly and symmetrically distributed on the outer periphery of the bottom washer 2. The back of the bottom washer 2 is provided with a knurled contact surface 6, and the front and back surfaces of the upper washer 1 are provided with knurled anti-slip surfaces 7 that contact the nut.

[0020] During specific use, the bottom gasket 2 is installed in the installation groove 3 of the upper gasket 1. The gradient tooth surface 4 provided on the installation groove 3 and the bottom gasket 2 is used to increase the tightness of the installation. The tooth structure 5 provided on the bottom gasket 2 is used to contact the equipment body to be installed. The knurled anti-slip surface 7 provided on the bottom gasket 2 is used to improve the tightness of the contact with the nut. When tightening the bolt, a fixed torque tightening tool is used to assemble the gasket body with a special double-layer drive sleeve. The outer layer of the double-layer drive sleeve is clamped on the tooth structure 5 on the outer periphery of the bottom gasket. The friction force generated by the knurled contact surface 6 provided on the bottom gasket 2 and the equipment body provides a tightening reaction force, so that only axial tension is generated when the bolt is tightened, and no lateral bias load is generated, thereby improving the axial force accuracy of the bolt.

[0021] like Figure 6 As shown, after the washer body is tightened with the bolt, since the angle (α) of the toothed structure 5 is greater than the rising angle (β) of the bolt thread, it can form a geometric self-locking, further ensuring that the bolt does not loosen, thereby achieving the effect of improving the bolt axial force accuracy during tightening, and also playing a role in preventing loosening after tightening is completed.

[0022] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, material, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, material, or apparatus.

[0023] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A toothed reaction geometry self-locking anti-loosening washer, characterized by: It includes a washer body, which is composed of an upper washer and a bottom washer. The front of the bottom washer is provided with a mounting groove for installing the upper washer. The upper washer is installed in the mounting groove. The bottom surface of the mounting groove and the contact surface of the upper washer are both provided with gradient tooth surfaces. The gradient tooth surface angle is set to be greater than the thread rise angle to form geometric self-locking, ensuring that the bolt will not loosen after tightening.

2. A toothed reaction geometric self-locking anti-loosening washer according to claim 1, characterized in that: The outer periphery of the bottom gasket is provided with a tooth structure adapted to the drive sleeve. The tooth structure is evenly and symmetrically distributed on the outer periphery of the bottom gasket and is used to adapt to the drive sleeve to provide a circumferential reaction force when tightening the nut with a constant torque, thereby improving the axial force accuracy during tightening.

3. The toothed reaction geometric self-locking anti-loosening washer according to claim 2, characterized in that: The back of the bottom washer is provided with a knurled contact surface, and the front of the upper washer is provided with a knurled anti-slip surface that contacts the nut. The friction coefficient of the knurled contact surface of the bottom washer is greater than the friction coefficient of the knurled anti-slip surface of the contact surface between the upper washer and the nut.

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