Anti-loose combined nut using spring washer

Abstract

The utility model relates to the technical field of fasteners, in particular to an anti-loose combined nut using a spring washer, which comprises a nut body and the spring washer, an annular groove is further arranged on the inner side wall of the spring washer, one end of the nut body is fixedly connected with an annular plate which is connected end to end, the annular plate and the nut body are coaxially arranged, and the spring washer is arranged in the annular groove. The annular plate is arranged in a trumpet shape from the side close to the nut body to the direction away from the nut body. The outer diameter of the joint of the annular plate and the nut body is smaller than the inner diameter of the spring washer, and the outer diameter of the end, away from the nut body, of the annular plate is larger than the inner diameter of the spring washer and smaller than the diameter of the groove. When the annular plate partially extends into the groove of the spring washer, the nut body and the spring washer form a combined nut; when the annular plate completely extends into the groove in the spring washer, the annular plate is damaged so as to limit relative rotation of the nut and the spring washer.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a locknut combination using a spring washer. Background Art

[0002] Bolt connection is one of the commonly used fasteners, which is widely used in the fields of machinery, construction, etc. and plays an important role. When the bolt is working, the machine equipment will generate continuous vibration, which constantly acts on the connecting bolt. Over time, the vibration will gradually reduce the friction between the bolt and the nut, resulting in the loosening of the bolt.

[0003] Generally, it is considered that the anti-loosening effect of the spring washer is better than that of the flat washer, and the best effect is achieved by using a pair of special anti-loosening washers with inclined steps that are engaged with each other. However, the special anti-loosening washer not only has a high manufacturing cost, but also is relatively complex to install. Once one of the two anti-loosening washers is installed reversely, the anti-loosening effect is lost. Usually, bolt connections are assembled in combination, and the single installation quantity is large, so it is very easy to fail to achieve the expected anti-loosening effect due to installation errors. Content of the Utility Model

[0004] The purpose of the utility model is to provide a locknut combination using a spring washer to solve the above deficiencies in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A locknut combination using a spring washer includes a nut body and a spring washer. A circumferential groove is further provided on the inner side wall of the spring washer. One end of the nut body is fixedly connected with an annular plate connected end to end. The annular plate is coaxially arranged with the nut body. The annular plate is arranged in a flared shape from the side close to the nut body to the direction away from the nut body. The outer diameter of the connection part between the annular plate and the nut body is smaller than the inner diameter of the spring washer, and the outer diameter of the end of the annular plate away from the nut body is larger than the inner diameter of the spring washer and smaller than the diameter of the groove. When the annular plate partially extends into the groove of the spring washer, the nut body and the spring washer form a locknut combination. When the annular plate completely extends into the groove on the spring washer, the annular plate is damaged to limit the relative rotation between the nut and the spring washer.

[0007] Further, the outer diameter of the nut body is smaller than the outer diameter of the spring washer.

[0008] Further, the thickness of the annular plate is less than one-tenth of the thickness of the spring washer.

[0009] Further, the depth of the groove on the spring washer is not greater than one-fourth of the difference between the outer diameter and the inner diameter of the spring washer.

[0010] Further, the groove is arranged in a U shape.

[0011] Further, a plurality of annular grooves are provided on the spring washer, and each of the grooves communicates with the groove.

[0012] In the above technical solution, the beneficial effects of a lock - prevention combined nut using a spring washer provided by the present utility model are as follows:

[0013] 1. By providing the combined nut, the integral installation of the nut body and the spring washer is realized, the installation process is optimized, and the reduction of the lock - prevention effect caused by errors is avoided.

[0014] 2. By providing the annular plate and the spring washer, after the nut body is tightened, the spring washer generates additional elastic forces on both the tightened product and the nut body, thereby increasing the friction force to avoid loosening. In addition, when the annular plate completely extends into the groove on the spring washer, the annular plate is damaged under the action of the spring washer. On the one hand, it increases the contact surface and pressure with the groove on the spring washer, thereby increasing the friction force. On the other hand, the damaged annular plate forms a physical obstacle in the groove, thereby restricting the relative rotation between the nut body and the spring washer, and further improving the lock - prevention effect.

[0015] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0016] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and does not represent the full scope of the disclosed technology or a complete disclosure of all features. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments described in the present utility model, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present utility model;

[0019] Figure 2 It is a schematic diagram of the nut body structure provided by an embodiment of the present utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the spring washer after being flattened provided by an embodiment of the present utility model;

[0021] Figure 4 It is a schematic diagram of the natural state structure of the spring washer provided by an embodiment of the present utility model.

[0022] Description of the reference numerals:

[0023] 1. Nut body; 2. Spring washer; 21. Groove; 22. Card slot; 3. Annular plate. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0025] Please refer to Figures 1-4 , a lock - preventing combined nut using a spring washer 2, including a nut body 1 and a spring washer 2. A circumferential groove 21 is further provided on the inner side wall of the spring washer 2. One end of the nut body 1 is fixedly connected with an annular plate 3 connected end - to - end. The annular plate 3 and the nut body 1 are coaxially arranged. The annular plate 3 is arranged in a flared shape from the side close to the nut body 1 to the direction away from the nut body 1. The outer diameter of the connection part between the annular plate 3 and the nut body 1 is smaller than the inner diameter of the spring washer 2, and the outer diameter of the end of the annular plate 3 away from the nut body 1 is larger than the inner diameter of the spring washer 2 and smaller than the diameter of the groove 21. When the annular plate 3 partially extends into the groove 21 of the spring washer 2, the nut body 1 and the spring washer 2 form a combined nut. When the annular plate 3 completely extends into the groove 21 on the spring washer 2, the annular plate 3 is damaged to limit the relative rotation between the nut and the spring washer 2. The groove 21 is opened in the middle of the inner side wall of the spring washer 2 for the convenience of

[0026] Through the provided combined nut, the integrated installation of the nut body 1 and the spring washer 2 is realized, the installation process is optimized, and the reduction of the lock - preventing effect caused by errors is avoided. When the nut body 1 is tightened, the spring washer 2 generates additional elastic forces on both the tightened product and the nut body 1, thereby increasing the friction force to prevent loosening. In addition, when the annular plate 3 completely extends into the groove 21 on the spring washer 2, the annular plate 3 is damaged under the action of the spring washer 2. On the one hand, the contact surface and pressure with the groove 21 on the spring washer 2 are increased, thereby increasing the friction force. On the other hand, the damaged annular plate 3 forms a physical obstacle in the groove 21, thereby restricting the relative rotation between the nut body 1 and the spring washer 2 and further improving the lock - preventing effect.

[0027] Further, the outer diameter of the nut body 1 is smaller than the outer diameter of the spring washer 2.

[0028] Furthermore, the thickness of the circumferential plate is less than one-tenth of the thickness of the spring washer 2, ensuring that the annular plate 3 on the nut body 1 is damaged during fastening while the spring washer 2 is not significantly damaged.

[0029] Furthermore, the depth of the groove 21 on the spring washer 2 is not greater than one-fourth of the difference between the outer diameter and the inner diameter of the spring washer 2. The groove 21 is arranged in a U shape, ensuring that the groove does not significantly affect the overall mechanical properties of the spring washer 2 and does not cause significant stress concentration, thus ensuring the safety and reliability of the spring washer 2. The U-shaped groove 21 should be machined on the spring washer 2 before it is formed into a circle and heat-treated, which not only ensures the production efficiency during groove preparation but also ensures the consistency of the groove depth and shape, thereby ensuring the installation effect and the fastening and loosening prevention effect of the combined nut.

[0030] Furthermore, a plurality of annularly arranged clamping grooves 22 are also provided on the spring washer 2, and each of the clamping grooves 22 communicates with the groove 21. The clamping grooves 22 and the groove 21 together form grooves with inconsistent depths in the circumferential direction of the annular plate 3. When the annular plate 3 is damaged, a part of the damaged arc-shaped plate extends into the clamping groove 22, thereby enhancing the effect of physical obstruction and further improving the loosening prevention effect of the nut body 1.

[0031] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A lock - preventing combined nut using a spring washer (2), characterized in that: It includes a nut body (1) and a spring washer (2). A circumferential groove (21) is also provided on the inner side wall of the spring washer (2). One end of the nut body (1) is fixedly connected with an annular plate (3) connected end to end. The annular plate (3) and the nut body (1) are coaxially arranged. The annular plate (3) is arranged in a flared shape from the side close to the nut body (1) to the direction away from the nut body (1). The outer diameter at the connection between the annular plate (3) and the nut body (1) is smaller than the inner diameter of the spring washer (2). The outer diameter of the end of the annular plate (3) away from the nut body (1) is larger than the inner diameter of the spring washer (2) and smaller than the diameter of the groove (21). When the annular plate (3) partially extends into the groove (21) of the spring washer (2), the nut body (1) and the spring washer (2) form a combined nut. When the annular plate (3) completely extends into the groove (21) on the spring washer (2), the annular plate (3) is damaged to limit the relative rotation between the nut and the spring washer (2).

2. The anti-loosening combined nut using a spring washer (2) according to claim 1, characterized in that, The outer diameter of the nut body (1) is smaller than the outer diameter of the spring washer (2).

3. The anti-loosening combined nut using a spring washer (2) according to claim 1, characterized in that, The thickness of the circumferential plate is less than one-tenth of the thickness of the spring washer (2).

4. A locknut using a spring washer (2) according to claim 1, characterized in that, The depth of the groove (21) on the spring washer (2) is not greater than one-fourth of the difference between the outer diameter and the inner diameter of the spring washer (2).

5. A locknut using a spring washer (2) according to claim 1, characterized in that, The groove (21) is arranged in a U shape.

6. A locknut combination using a spring washer (2) according to claim 1, characterized in that, A plurality of annularly arranged card slots (22) are also provided on the spring washer (2), and each of the card slots (22) communicates with the groove (21).

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