Anti-loosening and anti-falling nut

Abstract

The utility model relates to the technical field of nuts, in particular to an anti-loose and anti-disengagement nut. Comprising a nut body, a wedge-shaped inclined face is arranged at the tooth bottom of an internal thread of the nut body, the included angle between the wedge-shaped inclined face and the axis of the internal thread is 30 degrees, and a non-supporting face and / or a hexagonal face of the nut body are / is provided with an extrusion face. Compared with the prior art, the structure is simple, machining is easy, the stability and safety of nut connection are guaranteed, bolt and nut looseness caused by vibration or other external factors is prevented, and therefore stable operation of an electric power system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nuts, in particular to a nut that is prevented from loosening and falling off. Background Art

[0002] With the development of the economy, the construction of the national power system has entered an important stage of full start-up and accelerated advancement. In the power system, the anti-loosening and anti-detachment of fasteners is a focus of attention, which is related to the stability and safety of the connection.

[0003] At present, existing traditional nuts are prone to loosening when faced with external environmental factors such as vibration and temperature changes. The stability of the fasteners cannot be guaranteed, which affects the safety of the power system. Therefore, it is very necessary to design a nut that prevents loosening and falling off. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an anti-loosening and anti-falling nut, which can be applied to the field of fixing equipment of power systems, overhead line towers, and bolt connections.

[0005] To achieve the above-mentioned purpose, a nut that prevents loosening and falling off is designed, comprising a nut body, wherein a wedge-shaped inclined surface is provided at the bottom of the internal thread of the nut body, the angle between the wedge-shaped inclined surface and the axis of the internal thread is 30 degrees, and the non-support surface and / or hexagonal surface of the nut body is provided with an extrusion surface.

[0006] The extrusion surface on the non-support surface is extruded from the outside to the middle, so that the internal thread at the end of the non-support surface is elliptical.

[0007] The number of the extrusion surfaces is 2, and the two extrusion surfaces are arranged opposite to each other.

[0008] The nut body and the bolt are interference fit.

[0009] An extrusion point is provided on the extrusion surface of the hexagonal surface, and the extrusion point is extruded toward the core of the nut body.

[0010] The extrusion point forms a bulge on the inner side of the internal thread of the nut body.

[0011] The number of the extrusion surfaces is 2, and the two extrusion surfaces are arranged opposite to each other.

[0012] The number of the extrusion surfaces is 3, and the 3 extrusion surfaces are spaced and evenly arranged.

[0013] The nut body is selected from one of a hexagonal nut, a flange nut, a flange nut, and a nut with a large chamfer on the non-support surface.

[0014] Compared with the prior art, the utility model has a simple structure and is easy to process, ensures the stability and safety of the nut connection, prevents the bolts and nuts from loosening due to vibration or other external factors, and thus ensures the stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the front view of the first embodiment of the present invention.

[0016] Figure 2 This is a top view of the first embodiment of the present invention.

[0017] Figure 3 This is the front view of the second embodiment of the present utility model.

[0018] Figure 4 This is a top view of the second embodiment of the present invention.

[0019] Figure 5 This is a top view of the third embodiment of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings. Example 1

[0021] like Figures 1 to 2 As shown, a wedge-shaped inclined surface 2 is provided at the bottom of the internal thread 8 of the nut body 1, and the angle between the wedge-shaped inclined surface 2 and the axis of the internal thread 8 is 30 degrees. An extrusion surface 5 is provided on the non-support surface 3 of the nut body 1.

[0022] The extrusion surface 5 on the non-support surface 3 is extruded from the outside to the middle, so that the internal thread 8 at the end of the non-support surface 3 is elliptical.

[0023] The number of the extrusion surfaces 5 is two, and the two extrusion surfaces 5 are arranged opposite to each other.

[0024] During specific use, the nut body 1 and the bolt are interference fit.

[0025] The nut body 1 is selected from one of a hexagonal nut, a flange nut, a flange nut, and a nut with a large chamfer on the non-support surface.

[0026] When this embodiment is used, since there is a 30° wedge-shaped slope 2 at the bottom of the internal thread 8, when the bolt and nut are tightened together, the tip of the bolt is tightly pressed against the wedge-shaped slope 2 of the internal thread 8, thereby generating a large locking force, effectively solving the problem of loosening of the bolt and nut due to vibration or other external factors. The two end surfaces of the non-support surface 3 of the nut body 1 are squeezed toward the middle, changing the shape of the internal thread 8 at the end of the non-support surface 3 from a circular thread to an elliptical shape. Since the internal thread 8 at the non-support surface end becomes elliptical, when the external thread of the bolt is screwed in with the help of external force, the nut body 1 and the bolt produce an interference fit, achieving the purpose of self-locking and anti-slip. Example 2

[0027] This embodiment only describes the differences from the first embodiment, and the similarities are not described again.

[0028] The difference between this embodiment and the first embodiment is that Figures 3 and 4 As shown, in this embodiment, an extrusion surface 5 is provided on the hexagonal surface 4 of the nut body 1 .

[0029] An extrusion point 6 is provided on the extrusion surface 5 on the hexagonal surface 4 . The extrusion point 6 is extruded toward the core of the nut body 1 , forming a protrusion 7 inside the internal thread 8 of the nut body 1 , thereby changing the shape of the internal thread 8 .

[0030] In this embodiment, the number of the extrusion surfaces 5 is three, and the three extrusion surfaces 5 are spaced apart and evenly arranged.

[0031] In this embodiment, two points are squeezed from the hexagonal surface 4 of the nut body 1 toward the nut core, thereby changing the shape of the internal thread 8 and achieving the purpose of self-locking and anti-slipping. Example 3

[0032] This embodiment only describes the differences from the second embodiment, and the similarities are not repeated.

[0033] The difference between this embodiment and the second embodiment is that Figure 5 As shown, in this embodiment, the number of the extrusion surfaces 5 is two, and the two extrusion surfaces 5 are arranged opposite to each other and are respectively located on the opposite surfaces of the hexagon. Example 4

[0034] This embodiment only describes the differences from the first embodiment, and the similarities are not described again.

[0035] The difference between this embodiment and the first embodiment is that, in this embodiment, an extrusion surface 5 is provided on both the non-support surface 3 and the hexagonal surface 4 of the nut body 1 .

[0036] The arrangement of the extrusion surface 5 on the hexagonal surface 4 is the same as that of the extrusion surface 5 in the second embodiment.

[0037] This embodiment changes the shape of the internal threads at the corresponding positions of the non-support surface 3 and the hexagonal surface 4 to achieve the purpose of self-locking and anti-slipping. Example 5

[0038] This embodiment only describes the differences from the third embodiment, and the similarities are not described again.

[0039] The difference between this embodiment and the third embodiment is that, in this embodiment, an extrusion surface 5 is provided on both the non-support surface 3 and the hexagonal surface 4 of the nut body 1 .

[0040] The arrangement of the extrusion surface 5 on the hexagonal surface 4 is the same as that of the extrusion surface 5 in the third embodiment.

[0041] This embodiment changes the shape of the internal threads at the corresponding positions of the non-support surface 3 and the hexagonal surface 4 to achieve the purpose of self-locking and anti-slipping.

Claims

1. A nut for preventing loosening and falling off, comprising a nut body, characterized in that: A wedge-shaped inclined surface (2) is provided at the bottom of the internal thread (8) of the nut body (1), and the angle between the wedge-shaped inclined surface (2) and the axis of the internal thread (8) is 30 degrees. The hexagonal surface (4) of the nut body (1) is provided with an extrusion surface (5); An extrusion point (6) is provided on the extrusion surface (5) on the hexagonal surface (4), and the extrusion point (6) is extruded toward the core of the nut body (1); The extrusion point (6) forms a protrusion (7) on the inner side of the internal thread (8) of the nut body (1).

2. The anti-loosening and anti-falling nut according to claim 1, characterized in that: The extrusion surface (5) on the non-support surface (3) of the nut body (1) is extruded from the outside toward the middle, so that the internal thread (8) at the end of the non-support surface (3) is elliptical.

3. The anti-loosening and anti-falling nut according to claim 2, characterized in that: The number of the extrusion surfaces (5) is two, and the two extrusion surfaces (5) are arranged opposite to each other.

4. The anti-loosening and anti-falling nut according to claim 2 or 3, characterized in that: The nut body (1) is interference fit with the bolt.

5. The anti-loosening and anti-falling nut according to claim 1, characterized in that: The number of the extrusion surfaces (5) is two, and the two extrusion surfaces (5) are arranged opposite to each other.

6. The anti-loosening and anti-falling nut according to claim 1, characterized in that: The number of the extrusion surfaces (5) is 3, and the 3 extrusion surfaces (5) are spaced and evenly arranged.

7. The anti-loosening and anti-falling nut according to claim 1 or 2, characterized in that: The nut body (1) is selected from one of a hexagonal nut, a flange nut, and a flange nut.

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