Anti-loose nut for construction

Abstract

The utility model provides a kind of anti-loose nut for building belongs to nut technical field.It solves the problem that existing nut bolt connection is easy to loosen.The anti-loose nut for building, including the nut body with threaded hole in middle part and the gasket with through hole in middle part, gasket is the open gasket with opening, nut body and gasket between being equipped with when the width of opening is used to make the retraction structure smaller when both coaxial relative movement, nut body and gasket between still being equipped with ratchet and pawl structure.Gasket is open gasket, when nut body and gasket coaxial relative movement, guide cone hole can make gasket hug tightly screw rod, realize axial positioning, simultaneously through the ratchet and pawl structure of being set can prevent nut body reverse rotation, anti-loose effect is good, stable and reliable, and it has advantages such as reasonable structure design, easy to process, low manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the field of nut technology and relates to an anti-loosening nut for construction. Background Technology

[0002] Anti-loosening screw assembly structures typically involve a screw passing through a through hole in the workpiece and being screwed in with two nuts to prevent loosening. Alternatively, the screw can pass through a through hole, with washers and spring washers fitted onto it before finally being screwed in with a nut. However, in specialized fields such as railway track laying and bridge connections, the contact surfaces between the nut and the spring washer or gasket are flat. Vibration from the railway track can cause the threaded surface to slip, easily leading to the screw or nut rotating and loosening. This can ultimately result in threaded connection failure and potentially cause safety accidents. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a construction anti-loosening nut with good anti-loosening effect.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A building anti-loosening nut includes a nut body with a threaded hole in the middle and a washer with a through hole in the middle. The washer is an open washer with an opening. A retraction structure is provided between the nut body and the washer to reduce the width of the opening when the two move relative to each other on the same axis. A ratchet and pawl structure is also provided between the nut body and the washer.

[0006] The nut body and washer are used together, with the through hole and threaded hole coaxial. The opening is connected to the through hole. When the washer is subjected to radial inward force, the width of the opening decreases, and at the same time, the inner diameter of the washer decreases, which firmly grips the screw that mates with the building anti-loosening nut, achieving axial positioning. Combined with the ratchet and pawl structure, it can prevent the nut from rotating in the opposite direction, providing a good anti-loosening effect.

[0007] In the aforementioned anti-loosening nut for construction, the recessed structure includes a guide cone hole located at one end of the nut body and coaxially connected with the threaded hole. The diameter of the guide cone hole at the end near the threaded hole is smaller than the diameter at the other end of the guide cone hole. The outer diameter of the washer is smaller than the maximum diameter of the guide cone hole, and the outer diameter of the washer is larger than the minimum diameter of the guide cone hole.

[0008] The screw, which mates with the construction anti-loosening nut, passes through the workpiece and the washer in sequence before being threaded onto the nut body. The head of the screw rests against one side of the workpiece, and the washer rests against the other side. As the nut body tightens, it gradually contacts and compresses the washer. The axial movement of the nut body drives the inner diameter of the washer to decrease through the guide cone hole. The washer then firmly holds the screw mating with the construction anti-loosening nut, achieving axial positioning.

[0009] In the aforementioned anti-loosening nuts for construction, the washer has a guide cone surface at one end near the nut body. The guide cone surface is positioned opposite to the guide cone hole, which increases the contact area between the washer and the nut body, improving stability and allowing for better clamping of the screw.

[0010] In the aforementioned anti-loosening nut for construction, the inner wall of the through hole has several axially extending ribs. When the radial dimension of the washer decreases, the ribs abut against the thread of the screw, that is, the screw is tightened by the ribs.

[0011] In the aforementioned anti-loosening nuts for construction, there are at least three reinforcing ribs. Preferably, the at least three reinforcing ribs are evenly distributed along the centerline of the washer.

[0012] In the aforementioned anti-loosening nut for construction, the nut body has an annular retaining edge at one end of the guide cone hole, and the ratchet and pawl structure is located between the annular retaining edge and the washer.

[0013] The outer surface of the annular retaining flange and the outer surface of the nut body are on the same annular surface. The annular retaining flange has a relatively thick wall to meet the stress requirements and the installation requirements of the ratchet and pawl structure. The washer is located inside the annular retaining flange. When the guide cone surface abuts against the guide cone hole and the washer holds the screw tightly, the end of the washer away from the nut body is flush with the end of the annular retaining flange away from the nut body, or the end of the washer away from the nut body slightly protrudes from the end of the annular retaining flange away from the nut body.

[0014] In the aforementioned anti-loosening nut for construction, the ratchet and pawl structure includes a number of ratchet teeth evenly distributed on the outer wall of the washer and a pawl located on the inner side of the annular retaining edge. The number of ratchet teeth and the washer together form a ratchet, and the pawl is configured to cooperate with the ratchet.

[0015] In the aforementioned anti-loosening nut for construction, the pawl is a spring clip. During the tightening process, due to the elasticity of the pawl, it can bypass the ratchet teeth without hindering the rotation of the nut body. At the same time, the ratchet teeth and pawl can prevent the nut body from rotating in the opposite direction, resulting in a good anti-loosening effect.

[0016] In the aforementioned anti-loosening nut for construction, the ratchet and pawl structure includes a number of ratchet teeth evenly distributed on the inner wall of the annular flange and a pawl provided on the washer. The number of ratchet teeth and the annular flange form an inner ratchet, and the pawl is configured to cooperate with the ratchet.

[0017] Compared with existing technologies, this anti-loosening nut for construction has the following advantages:

[0018] The gasket is an open gasket. When the nut body and the gasket move coaxially relative to each other, the guide cone hole allows the gasket to grip the screw and achieve axial positioning. At the same time, the ratchet and pawl structure prevents the nut body from rotating in the opposite direction, resulting in good anti-loosening effect and stable and reliable performance. Moreover, the structure is reasonably designed, easy to process, and has low manufacturing cost. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the anti-loosening nut for construction provided in Embodiment 1.

[0020] Figure 2 This is a bottom view of the anti-loosening nut for construction provided in Embodiment 1.

[0021] Figure 3 This is a schematic diagram of the connection between the anti-loosening nut and the screw provided in Embodiment 1.

[0022] In the diagram, 1 is the nut body; 11 is the threaded hole; 12 is the guide cone hole; 13 is the annular flange; 2 is the washer; 21 is the through hole; 22 is the opening; 23 is the guide cone surface; 24 is the rib; 3 is the screw; 31 is the screw head; 4 is the ratchet tooth; and 5 is the pawl. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] Example 1

[0025] like Figure 1 The construction anti-loosening nut shown is used in conjunction with a screw 3 with a shank head 31 to lock the workpiece. The construction anti-loosening nut includes a nut body 1 with a threaded hole 11 in the center and a washer 2 with a through hole 21 in the center. The nut body 1 and washer 2 are used together and are coaxially arranged, with the through hole 21 and the threaded hole 11 being coaxial. The washer 2 is an open washer with an opening 22 that communicates with the through hole 21. When the washer 2 is subjected to a radially inward force, the width of the opening 22 decreases, and simultaneously, the inner diameter of the washer 2 decreases.

[0026] A recessed structure is provided between the nut body 1 and the washer 2 to reduce the width of the opening 22 when the two move relative to each other on the same axis. A ratchet and pawl structure is also provided between the nut body 1 and the washer 2. When the inner diameter of the washer 2 decreases, the screw 3 is firmly held, achieving axial positioning. Combined with the ratchet and pawl structure, the nut can be prevented from rotating in the opposite direction, resulting in a good anti-loosening effect.

[0027] like Figure 1As shown, the recessed structure includes a guide cone hole 12 located at one end of the nut body 1 and coaxially connected with the threaded hole 11. The diameter of the guide cone hole 12 at one end near the threaded hole 11 is smaller than the diameter at the other end of the guide cone hole 12. The outer diameter of the gasket 2 is smaller than the maximum diameter of the guide cone hole 12, and the outer diameter of the gasket 2 is larger than the minimum diameter of the guide cone hole 12.

[0028] like Figure 1 As shown, the gasket 2 has a guide cone surface 23 at one end near the nut body 1. The guide cone surface 23 is arranged opposite to the guide cone hole 12, which can increase the contact area between the gasket 2 and the nut body 1, improve stability, and better grip the screw 3.

[0029] like Figure 1 and Figure 2 As shown, the inner wall of the through hole 21 has several axially extending ribs 24. When the radial dimension of the gasket 2 decreases, the ribs 24 abut against the threads of the screw 3, that is, the screw 3 is held together by the ribs 24. There are at least three ribs 24. In this embodiment, as shown... Figure 2 As shown, there are three ribs 24, which are evenly distributed along the center line of the spacer 2.

[0030] like Figure 1 As shown, the nut body 1 has an annular retaining flange 13 at one end of the guide cone hole 12, and a ratchet and pawl structure is located between the annular retaining flange 13 and the washer 2. The outer surface of the annular retaining flange 13 and the outer surface of the nut body 1 are on the same annular surface. The wall thickness of the annular retaining flange 13 is relatively thick to meet the force requirements and the installation requirements of the ratchet and pawl structure. The washer 2 is located on the inner side of the annular retaining flange 13. When the guide cone surface 23 abuts against the guide cone hole 12 and the washer 2 holds the screw 3 tightly, the end of the washer 2 away from the nut body 1 is flush with the end of the annular retaining flange 13 away from the nut body 1, or the end of the washer 2 away from the nut body 1 slightly protrudes from the end of the annular retaining flange 13 away from the nut body 1.

[0031] like Figure 2 As shown, the ratchet and pawl structure includes several ratchet teeth 4 evenly distributed on the outer wall of the washer 2 and pawls 5 located on the inner side of the annular retaining flange 13. The ratchet teeth 4 and the washer 2 form a ratchet, and the pawls 5 are configured to cooperate with the ratchet. The pawl 5 is a spring plate. During the tightening process of the nut body 1, due to the elasticity of the pawl 5, the pawl 5 can bypass the ratchet teeth 4, without hindering the rotation of the nut body 1. At the same time, the ratchet teeth 4 and the pawl 5 can prevent the nut body 1 from rotating in the opposite direction, resulting in a good anti-loosening effect.

[0032] like Figure 3As shown, the screw 3, which mates with the building anti-loosening nut, passes through the workpiece and the washer 2 in sequence and is threadedly connected to the nut body 1. The head 31 of the screw 3 abuts against one side of the workpiece, and the washer 2 abuts against the other side of the workpiece. During the tightening process, the nut body 1 gradually contacts and compresses the washer 2. The axial movement of the nut body 1 drives the inner diameter of the washer 2 to decrease through the guide cone hole 12. The washer 2 firmly holds the screw 3, which mates with the building anti-loosening nut, thus achieving axial positioning.

[0033] Example 2

[0034] The structural principle of this embodiment is basically the same as that of Embodiment 1. The difference is that the ratchet and pawl structure includes several ratchet teeth 4 evenly distributed on the inner wall of the annular flange 13 and pawls 5 provided on the gasket 2. The several ratchet teeth 4 and the annular flange 13 form an inner ratchet, and the pawls 5 are configured to cooperate with the ratchet. The pawl 5 is a spring plate.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A type of anti-loosening nut for construction, characterized in that, The nut body (1) includes a nut body (1) with a threaded hole (11) in the middle and a washer (2) with a through hole (21) in the middle. The washer (2) is an open washer with an opening (22). A recessed structure is provided between the nut body (1) and the washer (2) to reduce the width of the opening (22) when the two move relative to each other on the same axis. A ratchet and pawl structure is also provided between the nut body (1) and the washer (2).

2. The anti-loosening nut for construction according to claim 1, characterized in that, The recessed structure includes a guide cone hole (12) located at one end of the nut body (1) and coaxially connected with the threaded hole (11). The diameter of the guide cone hole (12) at the end near the threaded hole (11) is smaller than the diameter at the other end of the guide cone hole (12). The outer diameter of the gasket (2) is smaller than the maximum diameter of the guide cone hole (12), and the outer diameter of the gasket (2) is larger than the minimum diameter of the guide cone hole (12).

3. The anti-loosening nut for construction according to claim 2, characterized in that, The gasket (2) has a guide cone surface (23) at one end near the nut body (1).

4. The anti-loosening nut for construction according to claim 1, 2, or 3, characterized in that, The inner wall of the through hole (21) has several axially extending ribs (24).

5. The anti-loosening nut for construction according to claim 4, characterized in that, The number of the reinforcing bars (24) is at least three.

6. The anti-loosening nut for construction according to claim 1, 2, or 3, characterized in that, The nut body (1) has an annular flange (13) at one end of the guide cone hole (12), and the ratchet pawl structure is located between the annular flange (13) and the washer (2).

7. The anti-loosening nut for construction according to claim 6, characterized in that, The ratchet and pawl structure includes several ratchet teeth (4) evenly distributed on the outer wall of the pad (2) and pawls (5) located on the inner side of the annular flange (13). The ratchet teeth (4) and the pad (2) form a ratchet, and the pawls (5) are configured to cooperate with the ratchet.

8. The anti-loosening nut for construction according to claim 7, characterized in that, The pawl (5) is a spring clip.

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