Lock nut

Abstract

The utility model discloses a locknut which comprises a fastening part, the fastening part is arranged on the outer side of a bolt used for being matched with the nut in a sleeved mode and is in threaded connection with the bolt, a screwing part is arranged on the outer side of the fastening part in a sleeved mode, and a connecting part is fixedly connected between the fastening part and the top end of the screwing part. A V-shaped wide and shallow inner groove is defined by the fastening part, the connecting part and the screwing part. Due to the arrangement of the V-shaped wide and shallow inner groove, when a fastened object is vibrated, vibration force on the fastened object can be transmitted to the connecting part through the expanding part and the screwing part, the end, away from the fastened object, of the nut is converted into centripetal enclasping force, a bolt is enclasped, and the fastening effect is achieved. The nut is not prone to loosening when applied in a low-frequency and high-strength vibration scene, so that the fastening effect on a fastened object is improved, compared with a traditional U-shaped deep and narrow inner groove, the machining process can be simplified, the production cost can be reduced, and the nut is suitable for being used in the low-frequency and high-strength vibration scene.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a locking nut. Background Art

[0002] Nuts are parts that tightly connect mechanical equipment. They are connected to screws or bolts through the inner threads. Only nuts and bolts of the same specifications can be connected together. However, during the use of nuts, most of the stress will be concentrated on the 2-3 teeth at the bottom of the nut. Under the action of vibration, the nut is prone to loosening.

[0003] For example, the Chinese utility model patent with application number "202321621123.8" and name "A U-shaped anti-loosening nut" discloses a U-shaped anti-loosening nut, including: a fastening part, which is sleeved on the outside of a bolt used to match the nut and is threadedly connected to the bolt; a tightening part, which is sleeved on the outside of the fastening part and spaced apart from the fastening part; a connecting part, which connects the fastening part and the tightening part, so that the connecting part, the fastening part and the tightening part are enclosed to form an inner groove, and the notch of the inner groove is arranged toward the fastened object; the arrangement of the inner groove ensures that when the fastened object is vibrated, the vibration wave cannot be transmitted from the tightening part through the inner groove to the fastening part, but is transmitted to the connecting part through the force-bearing end face of the nut, the enlarged part, and the tightening part, and finally converted into a centripetal clamping force at the top of the nut, thereby making the nut less likely to loosen.

[0004] The U-shaped anti-loosening nut in the above-mentioned patent has a deep and narrow inner groove. Although the deeper inner groove can be more conducive to transmitting the vibration force exerted on the nut to the end of the nut away from the fastener, it has a better anti-loosening effect and is more suitable for use in high-frequency, low-intensity vibration scenarios. However, due to the deep and narrow inner groove, the actual production and processing is cumbersome and the production cost is high. Therefore, the present application proposes an anti-loosening nut with a wide and shallow inner groove. Compared with the traditional U-shaped deep and narrow inner groove, the V-shaped wide and shallow inner groove can simplify the processing technology and reduce the production cost, and is suitable for use in low-frequency, high-intensity vibration scenarios. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a locking nut.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an anti-loosening nut, including a fastening part, which is sleeved on the outside of a bolt used to match the nut and is threadedly connected to the bolt, a tightening part is sleeved on the outside of the fastening part, and a connecting part is fixedly connected between the top of the fastening part and the tightening part, and the fastening part, the connecting part and the tightening part are enclosed to form a V-shaped wide and shallow inner groove, and the notch of the V-shaped wide and shallow inner groove is set toward the object to be fastened.

[0007] As a further description of the above technical solution: the fastening portion, the connecting portion and the screwing portion are an integrally formed structure.

[0008] As a further description of the above technical solution: the inner surface of the fastening portion is provided with thread threads that are compatible with the threads on the outer surface of the bolt.

[0009] As a further description of the above technical solution: the bottom end of the tightening portion is fixedly connected with an enlarged portion, the enlarged portion and the tightening portion are an integrally formed structure, and the enlarged portion abuts against the object to be fastened.

[0010] As a further description of the above technical solution: the size of the enlarged portion is larger than the size of the twisting portion.

[0011] As a further description of the above technical solution: the bottom end of the fastening portion is higher than the bottom end of the enlarged portion, and there is a gap between the end of the fastening portion away from the connecting portion and the object to be fastened.

[0012] As a further description of the above technical solution: the depth dimension of the V-shaped wide and shallow inner groove is 10%-50% of the height dimension of the nut.

[0013] As a further description of the above technical solution: the width of the V-shaped wide and shallow inner groove close to the object to be fastened is greater than the width of the end away from the object to be fastened.

[0014] The utility model has the following beneficial effects:

[0015] Compared with the prior art, the anti-loosening nut, through the setting of the V-shaped wide and shallow inner groove, can transmit the vibration force on the fastened object to the connecting part through the expansion part and the screwing part when the fastened object is subjected to vibration, and convert it into a centripetal clamping force at the end of the nut away from the fastened object, holding the bolt, so that the nut is not easy to loosen in low-frequency and high-intensity vibration scenarios, thereby improving the fastening effect of the fastened object. Compared with the traditional U-shaped deep and narrow inner groove, it can simplify the processing technology and reduce the production cost, and is suitable for use in low-frequency and high-intensity vibration scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a U-shaped anti-loosening nut in the prior art;

[0017] Figure 2 A top view of the overall structure of a locking nut proposed by the utility model;

[0018] Figure 3 This is a bottom view of the overall structure of a locking nut proposed by the utility model;

[0019] Figure 4 The utility model is a cross-sectional view of the overall structure of a locking nut.

[0020] Legend:

[0021] 1. Fastening part; 2. Tightening part; 3. Connecting part; 4. V-shaped wide and shallow inner groove; 5. Enlarged part; 6. Screw thread. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 2-4 The utility model provides a kind of anti-loosening nut: it includes a fastening part 1, the fastening part 1 is sleeved on the outside of the bolt used to match the nut, and is threadedly connected with the bolt, the outside of the fastening part 1 is sleeved with a screwing part 2, and a connecting part 3 is fixedly connected between the tops of the fastening part 1 and the screwing part 2, the fastening part 1, the connecting part 3 and the screwing part 2 are an integrally formed structure, the fastening part 1, the connecting part 3 and the screwing part 2 are enclosed to form a V-shaped wide and shallow inner groove 4, the notch of the V-shaped wide and shallow inner groove 4 is arranged toward the fastened object, and the cross-sectional shape of the V-shaped wide and shallow inner groove 4 is a "V" shape with both sides inclined (not shown in the figure) or a "V" shape with one side vertical and the other side inclined (as shown in the figure) Figure 4 shown);

[0024] By setting the V-shaped wide and shallow inner groove 4, when the fastened object is subjected to vibration, the vibration force on the fastened object can be transmitted to the connecting part 3 through the enlarged part 5 and the screwing part, and converted into a centripetal clamping force at the end of the nut away from the fastened object, holding the bolt, so that the nut is not easy to loosen under the action of low-frequency vibration or long-term vibration, thereby improving the fastening effect of the fastened object. Compared with the traditional U-shaped deep and narrow inner groove, it can simplify the processing technology and reduce the production cost, and is suitable for use in low-intensity vibration scenarios.

[0025] The inner surface of the fastening portion 1 is provided with thread teeth 6 which are matched with the threads on the outer surface of the bolt.

[0026] The bottom end of the screwing part 2 is fixedly connected with an enlarged part 5 , the enlarged part 5 and the screwing part 2 are an integrally formed structure, and the enlarged part 5 abuts against the fastened object, and the size of the enlarged part 5 is larger than that of the screwing part 2 .

[0027] The bottom end of the fastening portion 1 is higher than the bottom end of the enlarged portion 5 , and there is a gap between the end of the fastening portion 1 away from the connecting portion 3 and the object to be fastened.

[0028] The depth dimension of the V-shaped wide and shallow inner groove 4 is 10%-50% of the height dimension of the nut.

[0029] The width of the V-shaped wide and shallow inner groove 4 close to the object to be fastened is greater than the width of the end away from the object to be fastened.

[0030] Working principle: The anti-loosening nut is threadedly connected to the thread on the matching bolt through the thread on the inner surface of the fastener. When the anti-loosening nut and the bolt are tightened, its enlarged part abuts against the fastened object, and the end of the fastening part close to the fastened object is spaced from the fastened object (that is, there is an interval), thereby completing the fastening of the fastened object. When the fastened object vibrates, the vibration force on the fastened object can be transmitted to the connecting part through the enlarged part and the screwing part, and converted into a centripetal clamping force at the end of the nut away from the fastened object, holding the bolt, so that the nut is not easy to loosen when used in low-frequency and high-intensity vibration scenarios, thereby improving the fastening effect of the fastened object.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A locking nut, comprising a fastening portion (1), the fastening portion (1) being sleeved on the outside of a bolt used to match the nut and being threadedly connected to the bolt, a screwing portion (2) being sleeved on the outside of the fastening portion (1), a connecting portion (3) being fixedly connected between the top ends of the fastening portion (1) and the screwing portion (2), characterized in that: The fastening portion (1), the connecting portion (3) and the screwing portion (2) are combined to form a V-shaped wide and shallow inner groove (4), and the notch of the V-shaped wide and shallow inner groove (4) is arranged toward the object to be fastened.

2. A locking nut according to claim 1, characterized in that: The fastening portion (1), the connecting portion (3) and the screwing portion (2) are an integrally formed structure.

3. The anti-loosening nut according to claim 1, characterized in that: The inner surface of the fastening portion (1) is provided with thread teeth (6) that match the threads on the outer surface of the bolt.

4. The anti-loosening nut according to claim 1, characterized in that: The bottom end of the tightening portion (2) is fixedly connected to an enlarged portion (5); the enlarged portion (5) and the tightening portion (2) are an integrally formed structure, and the enlarged portion (5) abuts against the object to be fastened.

5. A locking nut according to claim 4, characterized in that: The size of the enlarged portion (5) is greater than the size of the screwing portion (2).

6. A locking nut according to claim 4, characterized in that: The bottom end of the fastening portion (1) is higher than the bottom end of the enlarged portion (5), and a gap exists between the end of the fastening portion (1) away from the connecting portion (3) and the object to be fastened.

7. The anti-loosening nut according to claim 1, characterized in that: The depth dimension of the V-shaped wide and shallow inner groove (4) is 10%-50% of the height dimension of the nut.

8. The anti-loosening nut according to claim 1, characterized in that: The width of the V-shaped wide and shallow inner groove (4) close to the object to be fastened is greater than the width of the end away from the object to be fastened.

Images