Lock nut with helical tooth structure

Abstract

The utility model discloses a locknut with a helical tooth structure, and belongs to the technical field of nut locking. A locknut with a helical tooth structure comprises a screw and a nut, the screw comprises a rod body, and threads are arranged on the rod body of the screw; a thread is formed in the nut; the screw further comprises an elastic locking element, a through hole is formed in the middle of the elastic locking element, and threads matched with the screw rod body are formed in the hole wall of the through hole of the elastic locking element. The elastic locking element is sleeved outside the rod body of the screw in a threaded connection manner; the elastic locking element further comprises a plurality of inner helical teeth and a plurality of outer helical teeth; the plurality of inner helical teeth are positioned between adjacent threads in the hole wall of the elastic locking element and are uniformly distributed; the height of each inner helical tooth is gradually increased along the thread forming direction; the plurality of outer helical teeth are positioned between adjacent threads on the periphery of the elastic locking element and are uniformly distributed; the height of each outer helical tooth is gradually increased in the thread forming direction. The locking effect between the nut and the screw can be enhanced, so that the anti-loosening effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of nut anti-loosening, and more specifically relates to an anti-loosening nut with a helical tooth structure. Background Art

[0002] Conventional nuts do not have an anti-loosening function, but in some special use occasions, such as power transmission towers, railway projects, communication systems, highways and other field facilities. In order to prevent damage by lawless elements, the fastening nut is required to have an anti-loosening function.

[0003] Anti-loosening nut is a kind of nut. Anti-loosening nut is mainly used to prevent loosening of mechanical components. However, the existing anti-loosening nuts on the market have complex structures, high costs, and poor anti-loosening effects. Most of the existing anti-loosening nuts can achieve a locking effect, but the fit between the nut and the screw is not tight after locking, and the anti-loosening effect is poor, which affects daily use in life. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an anti-loosening nut with a helical tooth structure, which can realize the locking effect between the enhanced nut and the screw to achieve the anti-loosening effect.

[0005] The utility model discloses a locking nut with a helical tooth structure, comprising a screw and a nut, wherein the screw comprises a rod body, and a thread is provided on the rod body of the screw; the nut is provided with a thread; the nut also comprises an elastic locking element, a through hole is provided in the middle of the elastic locking element, and a thread matching the screw rod body is provided on the hole wall of the elastic locking element through hole; the elastic locking element threaded connection sleeve is arranged outside the screw rod body; the elastic locking element also comprises a plurality of inner helical teeth and a plurality of outer helical teeth, the plurality of inner helical teeth are located between adjacent threads in the hole wall of the elastic locking element and are evenly arranged; the height of each inner helical tooth increases gradually along the direction in which the threads are opened; the plurality of outer helical teeth are located between adjacent threads on the outer periphery of the elastic locking element and are evenly arranged; the height of each outer helical tooth increases gradually along the direction in which the threads are opened.

[0006] As a further improvement of the utility model, the outer periphery of the elastic locking element is a conical surface, and the outer periphery of the elastic locking element is provided with a thread matching the nut; the inside of the nut is a tapered hole; the hole wall of the tapered hole is a conical surface matching the outer periphery of the elastic locking element.

[0007] As a further improvement of the utility model, a breaking groove is provided at the upper end of the elastic locking element.

[0008] As a further improvement of the utility model, the end surface of each internal bevel tooth that abuts against the hole wall is flush with the thread surface in the hole wall.

[0009] As a further improvement of the utility model, the end surface of each external bevel tooth that fits the outer peripheral conical surface is flush with the thread surface inside the conical surface.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] Compared with the prior art, the present invention adds an elastic locking element between the screw and the nut, and the inner and outer sides of the elastic locking element are respectively provided with inner bevel teeth and outer bevel teeth. The addition of the inner and outer bevel teeth increases the friction between the nut, the screw and the elastic locking element, so as to strengthen the locking effect between the screw and the nut through the elastic locking element. The tapered hole in the nut matches the tapered surface formed on the outer periphery of the elastic locking element, and the contact area is increased through the tapered surface, so as to increase the anti-loosening effect between the elastic locking element and the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0013] Figure 2 It is a three-dimensional structural schematic diagram of the nut of the utility model;

[0014] Figure 3 It is a side view structural schematic diagram of the nut of the utility model;

[0015] Figure 4 For this utility model Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0016] Figure 5 It is a structural schematic diagram of the elastic locking element of the utility model;

[0017] Figure 6 It is a side view structural schematic diagram of the elastic locking element of the utility model;

[0018] Figure 7 For this utility model Figure 6 Schematic diagram of the cross-sectional structure at AA in the middle.

[0019] Description of the numbers in the figure:

[0020] Screw 1 , nut 2 , tapered hole 21 , elastic locking element 3 , breaking groove 31 , inner bevel teeth 32 , outer bevel teeth 33 , breaking groove 31 . DETAILED DESCRIPTION

[0021] Specific embodiment 1: Please refer to Figure 1-7 The invention discloses a locking nut with a helical tooth structure, comprising a screw 1, a nut 2 and an elastic locking element 3. The nut 2 is sleeved on the screw 1, and an elastic locking element 3 is further clamped between the nut 2 and the screw 1.

[0022] The screw 1 comprises a rod body and a rod cap, and the rod body of the screw 1 is provided with threads.

[0023] A tapered groove 21 is provided in the middle of the nut 2 , and a thread is provided on the hole wall of the tapered hole 21 .

[0024] A through hole is provided in the middle of the elastic locking element 3, and a thread matching the shaft of the screw 1 is provided on the hole wall of the elastic locking element 3. The threaded sleeve of the elastic locking element 3 is arranged outside the shaft of the screw 1. A plurality of evenly arranged inner bevel teeth 32 are provided between adjacent threads in the hole wall of the elastic locking element 3, and each inner bevel tooth 32 increases in height along the direction of thread opening, and the end face of each inner bevel tooth 32 that fits the hole wall is flush with the thread surface in the hole wall. The outer periphery of the elastic locking element 3 is a conical surface, and threads are provided on the conical surface. The conical surface formed by the hole wall of the tapered hole 21 matches the conical surface of the outer periphery of the elastic locking element 3, and threads matching the hole wall of the tapered hole 21 are provided. A plurality of evenly arranged outer bevel teeth 33 are provided between adjacent threads in the outer peripheral conical surface of the elastic locking element 3, and each outer bevel tooth 33 increases in height along the direction of thread opening, and the end face of each outer bevel tooth 33 that fits the outer peripheral conical surface is flush with the thread surface in the conical surface. A breaking groove 31 is formed at the upper end of the elastic locking element 3, and the breaking groove 31 is used for facilitating self-adjustment of the length.

[0025] Working principle:

[0026] When in use, the utility model uses an elastic locking element to further lock the fit between the screw and the nut. First, the elastic locking element is sleeved on the screw rod and threadedly connected, and the elastic locking element is also provided with inner bevel teeth between the threads connecting the screw and the elastic locking element, so as to strengthen the locking degree between the screw and the elastic locking element. At the same time, the outer periphery of the elastic locking element is a conical surface that matches the conical hole opened in the middle of the nut, so as to increase the contact area and improve the locking degree through the conical surface. At the same time, the outer periphery of the elastic locking element is threadedly connected to the nut, and outer bevel teeth are also provided between the threads on the outer periphery of the elastic locking element, and the locking degree between the nut and the elastic locking element is strengthened by the outer bevel teeth to achieve an anti-loosening effect.

Claims

1. A locking nut with a helical tooth structure, comprising a screw (1) and a nut (2), wherein the screw (1) comprises a shaft, the shaft of the screw (1) is provided with a thread, and the nut (2) is provided with a thread; the nut (2) is provided with a thread; the characteristics are as follows: The elastic locking element (3) further comprises an elastic locking element (3), wherein a through hole is formed in the middle of the elastic locking element (3), and a thread matching the shaft of the screw (1) is formed in the hole wall of the through hole of the elastic locking element (3); the elastic locking element (3) is threadedly sleeved outside the shaft of the screw (1); the elastic locking element (3) further comprises a plurality of inner bevel teeth (32) and a plurality of outer bevel teeth (33), wherein the plurality of inner bevel teeth (32) are located between adjacent threads in the hole wall of the elastic locking element (3) and are evenly arranged; the height of each inner bevel tooth (32) increases gradually along the direction in which the threads are formed; the plurality of outer bevel teeth (33) are located between adjacent threads on the outer periphery of the elastic locking element (3) and are evenly arranged; the height of each outer bevel tooth (33) increases gradually along the direction in which the threads are formed.

2. The anti-loosening nut with a helical tooth structure according to claim 1, characterized in that: The outer circumference of the elastic locking element (3) is a conical surface, and a thread matching the nut (2) is provided on the outer circumference of the elastic locking element (3); the inside of the nut (2) is a conical hole (21); and the hole wall of the conical hole (21) is a conical surface matching the outer circumference of the elastic locking element (3).

3. The anti-loosening nut with a helical tooth structure according to claim 1, characterized in that: The upper end of the elastic locking element (3) is provided with a breaking groove (31).

4. The anti-loosening nut with a helical tooth structure according to claim 1, characterized in that: The end surface of each internal bevel tooth (32) that abuts against the hole wall is flush with the thread surface in the hole wall.

5. The anti-loosening nut with a helical tooth structure according to claim 1, characterized in that: The end surface of each external bevel tooth (33) that fits the outer peripheral conical surface is flush with the thread surface inside the conical surface.

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