An automatic centering nut and washer assembly

Abstract

The utility model relates to the field of fastener, concretely is a kind of automatic centering nut washer assembly.It includes coaxially distributed nut and washer, nut has coaxially distributed thread hole, nut outer periphery has the outer wall surface of regular polygon, nut bottom has the inner taper surface that from outside to inside is up convex distribution, washer has coaxially distributed inner hole, washer bottom has tooth surface, washer top has the outer taper surface that from outside to inside is up convex distribution, outer taper surface and inner taper surface match.The inner taper surface and outer taper surface in the utility model match each other, play the role of automatic centering, thereby each other inhibits the radial slip of the other party, and does not increase dismounting moment, so that threaded connection is easy to disassemble while producing the anti-loose effect.

Description

Technical Field

[0001] This utility model relates to the field of fasteners, and in particular to an automatic centering nut and washer assembly. Background Technology

[0002] Threaded connections offer advantages such as low cost, easy assembly and disassembly, and high connecting force, making them widely used in machinery, transportation, and construction. However, in practical applications, due to various vibrations and impacts, threaded connections are prone to loosening. Loose threads not only reduce connecting force and lead to connection failure, but can also cause serious safety accidents in severe cases. Therefore, certain anti-loosening measures are necessary.

[0003] Double-layer self-locking washers are a commonly used type of anti-loosening fastener with excellent anti-loosening effect. Traditional double-layer self-locking washers rely on increasing the disassembly torque to prevent loosening, which, while providing an anti-loosening effect, also increases the difficulty of disassembling threaded connections. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background technology by proposing an automatic centering nut and washer assembly. The inner and outer conical surfaces cooperate with each other to achieve automatic centering, thereby inhibiting each other's radial slippage without increasing the disassembly torque. This makes the threaded connection easy to disassemble while providing an anti-loosening effect.

[0005] The technical solution of this utility model is an automatic centering nut and washer assembly, which includes a nut and a washer coaxially distributed. The nut has a threaded hole coaxially distributed, an outer wall surface of a regular polygon on the outer periphery of the nut, and an inner conical surface convex from the outside to the inside at the bottom of the nut. The washer has an inner hole coaxially distributed, a toothed surface at the bottom of the washer, and an outer conical surface convex from the outside to the inside at the top of the washer, with the outer conical surface matching the inner conical surface.

[0006] Preferably, the cross-sectional profiles of both the inner and outer conical surfaces are circular.

[0007] Preferably, the nut has an outer peripheral surface one, and the washer has an outer peripheral surface two, both of which are circumferential surfaces and are aligned with each other.

[0008] Preferably, the diameter of the outer peripheral surface is larger than the diameter of the circumcircle of the outer wall surface.

[0009] Preferably, the tooth surface includes a plurality of tooth-shaped modules evenly distributed in a ring, and the plurality of tooth-shaped modules are connected in a ring in sequence.

[0010] Preferably, the toothed module includes inclined surface one and inclined surface two, with one end of inclined surface one and one end of inclined surface two connected.

[0011] Preferably, the connecting ends of inclined plane one and inclined plane two are intersection lines, and the extension line of the intersection line passes through the central axis of the washer.

[0012] Preferably, the plane perpendicular to the central axis of the washer is used as the reference plane, the angle between the first inclined plane and the reference plane is between 50 degrees and 70 degrees, and the angle between the second inclined plane and the reference plane is between 5 degrees and 70 degrees.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] In this invention, the sharp corners on the toothed surface of the washer are embedded into the material of the clamped part due to compression, thereby restricting the relative slippage between the washer and the clamped part. The inner conical surface of the nut and the outer conical surface of the washer are automatically centered and coaxially engaged, inhibiting each other's radial slippage, thereby inhibiting the relative slippage between the nut and the clamped part, thus achieving an anti-loosening effect. Furthermore, the inner conical surface of the nut and the outer conical surface of the washer do not restrict their relative rotation, do not increase the disassembly torque, and make the threaded connection easy to disassemble while providing an anti-loosening effect. Attached Figure Description

[0015] Figure 1 This is a structural cross-sectional view of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure from above the nut;

[0018] Figure 4 This is a schematic diagram of the structure from below the nut;

[0019] Figure 5 This is a schematic diagram of the washer structure;

[0020] Figure 6 This is a schematic diagram of the structure after the washer is flipped over;

[0021] Figure 7 This is a schematic diagram of the tooth surface structure;

[0022] Figure 8 This is a schematic diagram of the structure of this utility model when applied to bolt loosening prevention.

[0023] Reference numerals: 1. Nut; 11. Inner conical surface; 12. Threaded hole; 13. Outer wall surface; 2. Washer; 21. Inner hole; 22. Outer peripheral surface two; 23. Tooth surface; 231. Inclined surface one; 2311. Intersection line; 232. Inclined surface two; 24. Outer conical surface. Detailed Implementation

[0024] like Figures 1-8As shown in the figure, the automatic centering nut and washer assembly proposed in this embodiment includes a nut 1 and a washer 2 that are coaxially distributed.

[0025] like Figures 2-4 As shown, the nut 1 has coaxially distributed threaded holes 12, the outer periphery of the nut 1 has a regular polygonal outer wall surface 13, the bottom of the nut 1 has an inner conical surface 11 that is convex upward from the outside to the inside, the cross-sectional profile of the inner conical surface 11 is circular, the outer periphery of the nut 1 has an outer peripheral surface one, the diameter of the outer peripheral surface one is larger than the diameter of the circumcircle of the outer wall surface 13, the regular polygonal outer wall surface 13 facilitates the disassembly and assembly of the nut 1, the outer peripheral surface one is staggered from the outer wall surface 13 to separate the outer wall surface 13 from the washer 2.

[0026] like Figure 5 and Figure 6 As shown, washer 2 has coaxially distributed inner holes 21, which are coaxial with threaded holes 12. The bottom of washer 2 has a toothed surface 23, which provides an anti-loosening effect when embedded in the clamped part. The top of washer 2 has an outer conical surface 24 that convexes upwards from the outside to the inside, which matches the inner conical surface 11. The cross-sectional profile of the outer conical surface 24 is circular to achieve coaxial installation of nut 1 and washer 2. The outer periphery of washer 2 has an outer circumferential surface 22. Both outer circumferential surface 22 and outer circumferential surface 1 are circular and aligned with each other, resulting in better structural regularity after the nut-washer assembly is installed.

[0027] like Figure 6 and Figure 7 As shown, tooth surface 23 includes multiple tooth-shaped modules evenly distributed in a ring, meaning that the multiple tooth-shaped modules in tooth surface 23 are evenly distributed around the central axis of washer 2. The multiple tooth-shaped modules are connected sequentially in a ring. Each tooth-shaped module includes an inclined surface 1 231 and an inclined surface 232, with one end of inclined surface 1 231 connected to one end of inclined surface 232. The other end of inclined surface 1 231 is connected to one end of inclined surface 232 in an adjacent tooth-shaped module, and the other end of inclined surface 232 is connected to one end of inclined surface 1 231 in an adjacent tooth-shaped module. The multiple tooth-shaped modules are connected to each other in a ring, and the projections of the inner and outer circumferences of washer 2 are both circular. The connection point of inclined surface 1 231 and inclined surface 232 is an intersection line 2311, and the extension line of intersection line 2311 passes through the central axis of washer 2, resulting in a more regular structural design.

[0028] With the plane perpendicular to the central axis of washer 2 as the reference plane, the angle between inclined plane 1 231 and the reference plane is between 50 degrees and 70 degrees, and the angle between inclined plane 232 and the reference plane is between 5 degrees and 70 degrees. Within the range of the inclination angles of the two inclined planes, the protruding intersection line 2311 can be used to embed into the clamped part 1 to achieve the anti-loosening effect.

[0029] In this embodiment, after the bolt is passed through clamped part two and clamped part one, washer 2 is put on, nut 1 is screwed onto the bolt, and the nut is tightened to form a preload. Under the action of the preload, clamped part one, clamped part two, and washer 2 are clamped together. The sharp corner (i.e., intersection line 2311) on the tooth surface 23 of washer 2 will be embedded into the material of clamped part one due to compression, thereby restricting the relative slippage between washer 2 and clamped part one. At this time, the inner conical surface 11 of nut 1 and the outer conical surface 24 of washer 2 automatically center and coaxially engage, inhibiting the radial slippage of each other, thereby inhibiting the relative slippage between nut and clamped part one, thus achieving an anti-loosening effect. Moreover, the inner conical surface 11 of nut 1 and the outer conical surface 24 of washer 2 do not restrict the relative rotation of each other, do not increase the disassembly torque, and make the threaded connection easy to disassemble while producing an anti-loosening effect.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An automatic centering nut and washer assembly, characterized in that, The nut (1) and washer (2) are coaxially distributed. The nut (1) has a threaded hole (12) coaxially distributed. The outer periphery of the nut (1) has a regular polygonal outer wall surface (13). The bottom of the nut (1) has an inner conical surface (11) that is convex from the outside to the inside. The washer (2) has an inner hole (21) coaxially distributed. The bottom of the washer (2) has a toothed surface (23). The top of the washer (2) has an outer conical surface (24) that is convex from the outside to the inside. The outer conical surface (24) matches the inner conical surface (11).

2. The self-centering nut and washer assembly according to claim 1, characterized in that, The cross-sectional profiles of both the inner conical surface (11) and the outer conical surface (24) are circular.

3. The self-centering nut and washer assembly according to claim 1, characterized in that, The nut (1) has an outer peripheral surface one, and the washer (2) has an outer peripheral surface two (22). Both outer peripheral surfaces one and two (22) are circumferential surfaces and are aligned with each other.

4. The self-centering nut and washer assembly according to claim 3, characterized in that, The diameter of the outer circumferential surface is greater than the diameter of the circumcircle of the outer wall surface (13).

5. The self-centering nut and washer assembly according to claim 1, characterized in that, The tooth surface (23) includes multiple tooth-shaped modules that are evenly distributed in a ring, and the multiple tooth-shaped modules are connected in a ring in sequence.

6. The self-centering nut and washer assembly according to claim 5, characterized in that, The toothed module includes inclined surface one (231) and inclined surface two (232) with one end of inclined surface one (231) and the other end of inclined surface two (232) connected.

7. The self-centering nut and washer assembly according to claim 5, characterized in that, The connection point of inclined plane 1 (231) and inclined plane 2 (232) is the intersection line (2311), and the extension line of the intersection line (2311) passes through the central axis of the washer (2).

8. The self-centering nut and washer assembly according to claim 5, characterized in that, With the plane perpendicular to the central axis of the washer (2) as the reference plane, the angle between the first inclined plane (231) and the reference plane is between 50 degrees and 70 degrees, and the angle between the second inclined plane (232) and the reference plane is between 5 degrees and 70 degrees.

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