Stranded locknut assembly with high-elastic damping inner ring

Abstract

The utility model discloses a stranded locknut assembly with a high-elasticity damping inner ring, which comprises a nut, the bottom of the inner wall of the nut is in an unfilled corner shape, an elastic inner ring is filled in the unfilled corner shape, the shape of the elastic inner ring is the same as that of the unfilled corner shape, the height of the elastic inner ring is larger than that of the unfilled corner shape, and the height of the elastic inner ring is larger than that of the unfilled corner shape. The nut has the advantage of preventing the nut from loosening.

Description

Technical Field

[0001] This utility model belongs to the field of nut technology, specifically relating to a stranded anti-loosening nut assembly with a high-elasticity damping inner ring. Background Technology

[0002] Existing bolt-nut connections are clearance fits. After the nut is tightened, the upper part of the nut thread comes into contact with the lower part of the bolt thread. The nut transmits the upward rebound force of the connector to the bolt thread, causing the friction between the bolt thread and the nut thread to continuously increase. In other words, ordinary bolt-nut connections in existing technology mainly rely on the friction between the threads to prevent the nut from loosening and ultimately failing.

[0003] Existing technologies with some anti-loosening functions, such as elastic washers, nylon nuts, toothed double-layer anti-loosening washers, and flange nuts with toothed bottom surfaces, do not have ideal anti-loosening effects; they only delay the anti-loosening time. Utility Model Content

[0004] To solve the technical problem of loose nuts, this utility model provides a hinged anti-loosening nut assembly with a high-elasticity damping inner ring.

[0005] The specific plan is as follows:

[0006] A hinged anti-loosening nut assembly with a high-elasticity damping inner ring includes a nut, the bottom of the inner wall of the nut being notched, the notched area being filled with an elastic inner ring, the shape of the elastic inner ring being the same as the shape of the notched area, and the height of the elastic inner ring being greater than the height of the notched area.

[0007] The nut is a flange nut.

[0008] The notched shape includes a slope and a vertical surface, with a slope fixed on the vertical surface and a chamfer or rounded corner at the bottom of the vertical surface.

[0009] At least one groove or at least one protrusion is provided on the inclined surface, and at least one groove or at least one protrusion is provided on the vertical surface.

[0010] Both the inclined surface and the vertical surface are provided with threads, and the direction of the threads is opposite to or the same as the direction of the threads on the nut.

[0011] The notched shape can be any one of a triangle, rectangle, trapezoid, or arc.

[0012] The bottom of the elastic inner ring, near the end of the notched inner wall, is set as a right angle, chamfer, or rounded.

[0013] The elastic inner ring is made of a metallic or non-metallic material, and the non-metallic material is damping rubber.

[0014] The nut assembly also includes a washer, and the washer has at least one through hole.

[0015] The advantages of this utility model are as follows: the friction force preventing loosening of the nut assembly shown is increased in three aspects: A. the friction force between the inner surface of the nut notch and the outer surface of the elastic inner ring; B. the friction force between the inner surface of the elastic washer and the bolt thread; C. the friction force between the bottom of the elastic inner ring and the top of the washer; the sum of these three sub-items of friction force is the newly added anti-loosening friction force.

[0016] In addition, the elastic inner ring itself has sound absorption and vibration damping functions. Using this invention will significantly improve the noise and fluctuations generated by vibration.

[0017] These functions effectively prevent and stop the loosening and retraction of nuts under vibration, ensuring efficient and robust connection and safe service of nuts, bolts and connecting parts, thereby guaranteeing the long-term safe and stable operation of the mechanical equipment in which this component is used. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of an existing flange nut.

[0019] Figure 2 This is a cross-sectional view of a flange nut with a missing corner.

[0020] Figure 3 This is a schematic diagram showing a groove or protrusion on a missing corner.

[0021] Figure 4 This is a schematic diagram of a flange nut with a triangular notch.

[0022] Figure 5 This is a schematic diagram of a rectangular structure with a missing corner on a flange nut.

[0023] Figure 6 This is a schematic diagram of a trapezoidal structure with a notched corner on a flange nut.

[0024] Figure 7 This is a schematic diagram of a flange nut with a notched, arc-shaped structure.

[0025] Figure 8 This is a schematic diagram of the through-hole structure on the washer.

[0026] Figure 9 This is a schematic diagram of the flange nut before tightening.

[0027] Figure 10 This is a schematic diagram of the service state of the flange nut after it has been tightened.

[0028] Figure 11 This is a schematic diagram of the structure of the protrusions and recesses on the connector. Detailed Implementation

[0029] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the implementation of this utility model, not all of it. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] In this embodiment, the nut can be a regular nut or a flange nut, preferably a flange nut, and nut 1 is a high-strength nut, such as... Figure 1 The image shown is a cross-sectional view of a flange nut, in which... Figure 1 The upper middle part is a nut, and the lower part is a flange. The nut is fixed to the flange.

[0031] like Figure 2 As shown, a hinged anti-loosening nut assembly with a high-elasticity damping inner ring includes a nut 1, the bottom of the inner wall of the nut 1 is notched 2, the notched 2 is filled with an elastic inner ring 3, the shape of the elastic inner ring 3 is the same as the shape of the notched 2, and the height of the elastic inner ring 3 is greater than the height of the notched 2.

[0032] The notched corner 2 includes a slope 4 and a vertical surface 5. The slope 4 is fixed on the vertical surface 5, and the bottom end of the vertical surface 5 is provided with a chamfer or rounded corner. The chamfer or rounding prevents the elastic inner ring 3 from bulging outward and extending into the connection surface between the nut 1 and the connector 11 when the nut 1 is tightened.

[0033] like Figure 3 As shown, at least one groove 6 or at least one protrusion 7 is provided on the inclined surface 4, and at least one groove 6 or at least one protrusion 7 is provided on the vertical surface 5.

[0034] Preferably, the inclined surface 4 has an arc-shaped groove 6, and the vertical surface 5 has an arc-shaped protrusion 7. This allows the elastic inner ring 3 to engage with the inner surface of the notched corner 2, increasing the frictional force to prevent the nut from loosening. During installation, first install the elastic inner ring 3 into place, then tighten the flanged nut 1. The tightening torque used is 1.3 to 2 times that of a regular nut. Alternatively, the elastic inner ring 3 can be pressed into the notched corner 2 of the nut 1 first, and then the components can be tightened together.

[0035] Both the inclined surface 4 and the vertical surface 5 are provided with threads, the direction of which is opposite to or the same as the direction of the thread on the nut 1. In this embodiment, the opposite direction is preferred because the upper part of the thread on the nut 1 is generally right-handed, so the threads on the inclined surface 4 of the notched 2 and the vertical surface 5 are left-handed. During the tightening of the nut 1, the elastic inner ring 3 is forcibly compressed and extends into the left-handed thread groove of the vertical surface 5 of the notched 2. When the nut 1 is subjected to the impact of vibration and moves backward, since the left-handed thread on the vertical surface 5 is opposite to the right-handed thread on the upper part of the nut, the left-handed thread generated by the compression of the elastic inner ring 3 will prevent the nut 1 from moving backward in the right-handed case, thereby achieving the purpose of preventing the nut from moving backward and loosening.

[0036] In this embodiment, the presence of threads, grooves 6, or protrusions 7 on the inclined surface 4 and the vertical surface 5 allows the elastic inner ring 3 to be compressed and expanded, and then more tightly bound together with the notched inner surface of the nut 1, forming a unified whole.

[0037] like Figures 4 to 7 As shown, the missing corner 2 can be any one of a triangle, rectangle, trapezoid, or arc.

[0038] The bottom of the elastic inner ring 3 and the end near the notched inner wall are set as a right angle, chamfer, or rounded. The right angle, chamfer, or rounded bottom of the elastic inner ring 3 is used to prevent the part of the elastic inner ring 3 that bulges outward and downward from being pressed between the nut 1 and the connector 11 when the nut 1 is tightened, which would make it difficult to tighten the nut 1.

[0039] The elastic inner ring 3 is made of metal or non-metal material, and the non-metal material is damping rubber.

[0040] like Figure 8 As shown, the nut 1 assembly also includes a washer 8, which has at least one through hole 9. The washer 8 is installed between the nut 1 and the bolt head. The through hole 9 on the washer 8 allows the elastic inner ring 3 to be compressed and more tightly bonded to the upper surface of the washer 8, increasing the friction between the elastic inner ring 3 and the washer 8, forming a new joint, and further achieving the purpose of preventing the nut from loosening.

[0041] The upper part of the nut assembly described in this embodiment works on the same principle as a regular nut. The key technology is in the lower part, where the bottom of the inner wall of the nut is designed with a notched corner 2. Inside the notched corner 2 is a non-rigid, highly elastic inner ring, and the height of the elastic inner ring 3 is greater than the height of the notched corner 2.

[0042] In this embodiment, washer 8 is a metal washer. In actual assembly, washer 8 can be installed or not. Figures 9 to 10As shown, the bolt 10 passes through the connector 11. If a washer 8 is added, the washer 8 needs to be fitted onto the bolt 10, and then the elastic inner ring 3 is placed on the washer 8. The nut 1 is then gradually tightened from the top of the bolt 10.

[0043] If the washer 8 is not installed, the elastic inner ring 3 is placed directly on the connector 11, and the nut 1 is gradually tightened from the top of the bolt 10. At this time, the upper surface of the connector 11 needs to be set as a protrusion 12 or a recess 13. In this way, when the nut 1 presses the elastic inner ring 3, the lower surface of the elastic inner ring 3 can extend into the recess 13 of the connector 11, or the protrusion 12 of the connector 11 can extend into the lower surface of the elastic inner ring 3, which increases the engagement between the elastic inner ring 3 and the connector 11.

[0044] like Figure 10 As the nut 1 is gradually tightened, the height of the elastic inner ring 3 is compressed and reduced, causing the width between the inner and outer diameters of the elastic inner ring 3 to be squeezed and increased by the downward squeezing force. The inner wall is then forced into the groove between the threads of the bolt 10. The elastic inner ring 3 clamps the bolt thread from both the top and bottom, tightly twisting it into a single unit with the bolt thread. Furthermore, the outer wall of the elastic inner ring 3 is also forcibly pressed against the inner surface of the notched corner 2 at the bottom of the nut 1.

[0045] In addition, the surface of the notched 2 has grooves 6 or protrusions 7. Under the outward compression of the elastic inner ring 3, the outer surface of the elastic inner ring 3 will extend into the groove 6, and at the same time, the protrusions 7 will extend into the interior of the surface of the elastic inner ring, so that the elastic inner ring and the inner surface of the notched nut form a twisted state.

[0046] The lower surface of the elastic inner ring 3 is also drilled into the through hole 9 on the upper surface of the washer 8, thereby making the lower surface of the elastic inner ring 3 and the upper surface of the washer 8 interlock, further preventing the elastic inner ring from rotating backward under the action of vibration.

[0047] In this embodiment, the nut 1, elastic inner ring 3, bolt 10, and washer 8 form an interlocking four-part integrated structure, creating a seamless, integral material mixture. The connection method changes from a steel-to-steel gap contact between the nut and bolt to an interference contact between steel and flexible components, achieving a significantly increased frictional force and preventing loosening.

[0048] In this embodiment, bolt 10, nut 1, elastic inner ring 3, and washer 8 interlock to form a tightly integrated four-piece assembly. The upward elastic force of the elastic inner ring 3 makes the threaded contact between nut 1 and bolt 10 tighter and more secure, increasing the friction between them. Through these improvements, the purpose of preventing nut loosening is achieved, and it also has positive effects on vibration prevention, noise reduction, theft prevention, and leakage prevention.

[0049] The advantages of this utility model are as follows: the friction force of the nut assembly shown in the figure to prevent loosening is increased in three aspects: A. the friction force between the inner surface of the nut notch and the outer surface of the elastic inner ring; B. the friction force between the inner surface of the elastic inner ring and the bolt thread; C. the friction force between the bottom of the elastic inner ring and the top of the connector or washer; the sum of these three sub-items of friction force is the newly added anti-loosening friction force.

[0050] In addition, the elastic inner ring itself has sound absorption and vibration damping functions. Using this invention will significantly improve the noise and fluctuations generated by vibration.

[0051] These functions effectively prevent and stop the nut from loosening or slipping under vibration, ensuring an efficient and secure connection between the nut, bolt, and the connected parts, and guaranteeing safe service. This ensures that the mechanical equipment used with this component can operate safely and stably for a long time.

[0052] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A hinged anti-loosening nut assembly with a high-elasticity damping inner ring, characterized in that: It includes a nut (1), the bottom of the inner wall of the nut (1) is notched (2), the notched (2) is filled with an elastic inner ring (3), the shape of the elastic inner ring (3) is the same as the shape of the notched (2), and the height of the elastic inner ring (3) is greater than the height of the notched (2).

2. The hinged anti-loosening nut assembly with a high-elasticity damping inner ring according to claim 1, characterized in that: The nut (1) is a flange nut.

3. The hinged anti-loosening nut assembly with a high-elasticity damping inner ring according to claim 2, characterized in that: The notched corner (2) includes a slope (4) and a vertical surface (5). The slope (4) is fixed on the vertical surface (5), and the bottom end of the vertical surface (5) is provided with a chamfer or rounded corner.

4. The hinged anti-loosening nut assembly with a high-elasticity damping inner ring according to claim 3, characterized in that: The inclined surface (4) is provided with at least one groove (6) or at least one protrusion (7), and the vertical surface (5) is provided with at least one groove (6) or at least one protrusion (7).

5. The hinged anti-loosening nut assembly with a high-elasticity damping inner ring according to claim 3, characterized in that: Both the inclined plane (4) and the vertical plane (5) are provided with threads, and the direction of the threads is opposite to or the same as the direction of the threads on the nut (1).

6. The hinged anti-loosening nut assembly with a high-elasticity damping inner ring according to claim 1, characterized in that: The notched shape (2) can be any one of a triangle, rectangle, trapezoid or arc.

7. The hinged anti-loosening nut assembly with a high-elasticity damping inner ring according to claim 1, characterized in that: The bottom of the elastic inner ring (3) and the end near the notched inner wall are set as a right angle, chamfer, or rounded.

8. The hinged anti-loosening nut assembly with a high-elasticity damping inner ring according to claim 1, characterized in that: The elastic inner ring (3) is made of metal or non-metal material, and the non-metal material is damping rubber.

9. The hinged anti-loosening nut assembly with a high-elasticity damping inner ring according to claim 1, characterized in that: The nut (1) assembly also includes a washer (8) having at least one through hole (9).

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