Anti-loose hot-forged formed bolt assembly

Abstract

This utility model discloses an anti-loosening hot-forged bolt assembly, including a bolt, a nut, and an anti-loosening structure. The bolt has an integrally formed limiting shaft at its end, with multiple limiting grooves arranged in a circular array around its circumference. The nut has a polygonal limiting portion on its end face near the limiting shaft. The anti-loosening structure includes a polygonal limiting ring for expansion and contraction around the limiting portion, and two symmetrically arranged metal limiting springs on the limiting ring for embedding into two openings within it. Each metal limiting spring has a limiting protrusion integrally formed at its end away from the limiting sleeve for embedding into the limiting groove. After the nut is tightened, the limiting ring of the anti-loosening structure is first placed on the limiting portion of the nut, and then the nut is finely adjusted so that the limiting protrusions of the two metal limiting springs align with and embed into the limiting grooves, thereby achieving circumferential limiting of the nut and preventing further rotation, thus achieving the purpose of anti-loosening.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to an anti-loosening hot forged bolt assembly. Background Technology

[0002] Fasteners refer to all parts used for mechanical connection or fixation. Their core function is to maintain the positional stability and structural integrity of the parts. Fasteners are classified according to their shape and use as follows: (1) basic connecting parts, such as bolts, nuts, and washers; (2) special structural parts, such as clip nuts, vacuum clamps, and expansion granules.

[0003] A conventional bolt assembly includes a bolt and a nut. Hot-forged bolt assemblies have the following advantages: (1) Improved material utilization: Hot forging can control the plastic deformation of metal, allowing the material to flow fully during forging, reducing material waste and thus improving material utilization; (2) Improved mechanical properties: Hot forging can shape metal materials at high temperatures, causing them to undergo plastic deformation through external force, thereby obtaining better microstructure and mechanical properties. This process can refine metal grains, reduce internal defects, and improve the strength and toughness of the material; (3) Reduced internal stress: Compared with cold forging, hot forging helps reduce internal stress during processing because high temperatures make the metal easier to deform, reducing deformation resistance and thus reducing the generation of internal stress.

[0004] In existing bolt assemblies, washers are typically used in conjunction with bolts. The washers primarily serve to distribute pressure, prevent loosening, and protect the surfaces of the connected components. The purpose of this invention is to propose a new anti-loosening structure for bolt assemblies. Utility Model Content

[0005] The purpose of this invention is to provide a hot-forged bolt assembly with anti-loosening properties, which achieves the anti-loosening function through a new anti-loosening structure.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a hot-forged anti-loosening bolt assembly, comprising a bolt, a nut, and an anti-loosening structure, wherein the bolt is integrally provided with a limiting shaft at its end, and the limiting shaft is provided with a plurality of limiting grooves arranged in a circular array on its periphery; the nut is provided with a limiting part in the shape of a regular polygon on its end face near the limiting shaft; the anti-loosening structure includes a limiting ring in the shape of a regular polygon for expansion and contraction on the limiting part, and two metal limiting springs symmetrically arranged on the limiting ring for embedding into two of the opening grooves respectively, wherein the end of the metal limiting spring away from the limiting sleeve is integrally provided with a limiting protrusion for embedding into the limiting groove; during the process of the limiting sleeve being installed on the limiting part, the end of the metal limiting spring is first deformed by force and then abuts against the periphery of the limiting shaft, and then during the process of restoring deformation, the limiting protrusion is embedded in the limiting groove.

[0007] By adopting the above technical solution, after the nut is tightened, the limiting ring of the anti-loosening structure is first put on the limiting part of the nut, and then the nut is finely adjusted so that the limiting protrusions of the two metal limiting springs are aligned with the limiting grooves and embedded, thereby achieving circumferential limiting of the nut, so that the nut can no longer rotate, thus achieving the purpose of anti-loosening.

[0008] A further feature of this invention is that the end of the metal limiting spring away from the limiting sleeve extends upward at an angle toward the limiting shaft.

[0009] By adopting the above technical solution, the end of the metal limiting spring away from the limiting sleeve extends upward in an inclined direction toward the limiting shaft, so that it can be pushed outward during the process of the metal limiting spring abutting against the periphery of the limiting shaft, and then, through its recovery deformation process, it is convenient for the limiting protrusion to be embedded in the limiting groove for limiting.

[0010] A further feature of this invention is that the extension and retraction range of the limiting ring on the limiting part is 5-10mm.

[0011] By adopting the above technical solution, since the tightness of bolts varies in different usage scenarios, in this anti-loosening structure, the limiting ring is sleeved on the limiting part 1 and extends and retracts. By limiting the extension and retraction range of the limiting ring on the limiting part, it is ensured that the circumferential limiting effect on the nut can be achieved within a certain range, thereby achieving the anti-loosening effect.

[0012] A further feature of this invention is that two pressing pads are symmetrically arranged on the circumference of the limiting ring.

[0013] By adopting the above technical solution, during the installation of the anti-loosening structure, the metal limiting spring of the anti-loosening structure needs to be opened by the edge of the limiting shaft first, and the limiting ring needs to be fitted on the limiting part. The pressing piece is provided to facilitate pressing and installation.

[0014] A further feature of this invention is that the nut has six surfaces on its periphery, and the number of limiting grooves is six.

[0015] By adopting the above technical solution, the conventional nut has six sides and six limiting grooves. When the limiting protrusions of the two metal limiting springs are embedded in two of the limiting grooves, the required rotation angle of the nut will not be too large.

[0016] A further feature of this invention is that the inner ring of the limiting part is provided with an annular groove, and an annular rubber ring is embedded in the annular groove. During the process of tightening the nut onto the bolt, the annular rubber ring deforms and abuts against the threaded portion of the bolt.

[0017] By adopting the above technical solution, and by setting an annular rubber ring on the inner side of the limiting part, the annular rubber ring will deform and abut against the threaded part of the bolt during the process of tightening the nut onto the bolt, thereby further improving the anti-loosening effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is an exploded view of the structure of this utility model.

[0020] Reference numerals in the attached drawings: 1. Bolt; 1-1. Limiting shaft; 1-2. Limiting groove; 2. Nut; 2-1. Limiting part; 2-2. Annular groove; 2-3. Annular rubber ring; 3. Anti-loosening structure; 3-1. Limiting ring; 3-1-1. Pressing piece; 3-2. Metal limiting spring; 3-2-1. Limiting protrusion. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Example: An anti-loosening hot-forged bolt assembly, such as... Figure 1 As shown, it includes bolt 1, nut 2, and anti-loosening structure 3, wherein bolt 1 and nut 2 are both hot forged.

[0023] like Figure 1 and Figure 2 As shown, a limiting shaft 1-1 is integrally provided at the end of the bolt 1, and six limiting grooves 1-2 arranged in a circular array are provided on the periphery of the limiting shaft 1-1.

[0024] like Figure 1 and Figure 2 As shown, a hexagonal limiting part 2-1 is provided on the end face of the nut 2 near the limiting shaft 1-1. The nut 2 has six faces on its periphery, including the limiting part 2-1. An annular groove 2-2 is provided on the inner ring of the limiting part 2-1, and an annular rubber ring 2-3 is embedded in the annular groove 2-2. During the process of tightening the nut 2 onto the bolt 1, the annular rubber ring 2-3 deforms and abuts against the threaded part of the bolt 1.

[0025] like Figure 1 and Figure 2As shown, the anti-loosening structure 3 includes a regular polygonal limiting ring 3-1 for expansion and contraction on the limiting part 2-1, and two symmetrically arranged metal limiting springs 3-2 on the limiting ring 3-1 for embedding into two opening slots respectively. The end of each metal limiting spring 3-2 away from the limiting sleeve has an integrally formed limiting protrusion 3-2-1 for embedding into the limiting groove 1-2. During the installation of the limiting sleeve on the limiting part 2-1, the end of the metal limiting spring 3-2 first deforms under force and then abuts against the periphery of the limiting shaft 1-1. Then, during the recovery deformation process, the limiting protrusion 3-2-1 embeds into the limiting groove 1-2.

[0026] like Figure 1 and Figure 2 As shown, the extension and retraction range of the limiting ring 3-1 on the limiting part 2-1 is 5-10mm. The end of the metal limiting spring 3-2 away from the limiting sleeve extends upward at an angle toward the limiting shaft 1-1. Two pressing pieces 3-1-1 are symmetrically arranged on the circumference of the limiting ring 3-1.

[0027] Implementation effect: After the nut 2 is tightened, the limiting ring 3-1 of the anti-loosening structure 3 is first put on the limiting part 2-1 of the nut 2, and then the nut 2 is finely adjusted so that the limiting protrusions 3-2-1 of the two metal limiting springs 3-2 are aligned with the limiting grooves 1-2 and embedded, thereby achieving circumferential limiting of the nut 2, so that the nut 2 cannot continue to rotate, thus achieving the purpose of anti-loosening.

[0028] The metal limiting spring 3-2 extends upward at the end away from the limiting sleeve, tilting towards the limiting shaft 1-1. This allows it to expand outward as it contacts the circumference of the limiting shaft 1-1. During its recovery deformation, the limiting protrusion 3-2-1 easily embeds into the limiting groove 1-2 for positioning. Because the tightness of the bolt 1 varies in different applications, in this anti-loosening structure 3, the limiting ring 3-1 is fitted onto the limiting part 2-1 and extends and retracts. By limiting the range of extension and retraction of the limiting ring 3-1 on the limiting part 2-1, a circumferential limiting effect on the nut 2 is achieved within a certain range, thus preventing loosening. During the installation of the anti-loosening structure 3, the metal limiting spring 3-2 of the anti-loosening structure 3 needs to be opened by the edge of the limiting shaft 1-1, and the limiting ring 3-1 needs to be fitted onto the limiting part 2-1. The pressing piece 3-1-1 facilitates pressing and installation. The conventional nut 2 has six sides on its circumference, and the number of limiting grooves 1-2 is also six. At this time, when the limiting protrusions 3-2-1 of the two metal limiting springs 3-2 are embedded in two of the limiting grooves 1-2, the required rotation angle of the nut 2 will not be too large.

[0029] By providing an annular rubber ring 2-3 on the inner side of the limiting part 2-1, the annular rubber ring 2-3 deforms and abuts against the threaded part of the bolt 1 during the process of tightening the nut 2 onto the bolt 1, thereby further improving the anti-loosening effect.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A hot-forged anti-loosening bolt (1) assembly, comprising a bolt (1), a nut (2), and an anti-loosening structure (3), characterized in that: The end of the bolt (1) is integrally provided with a limiting shaft (1-1), and the periphery of the limiting shaft (1-1) is provided with a plurality of limiting grooves (1-2) arranged in a circular array. The nut (2) has a polygonal limiting part (2-1) on its end face near the limiting shaft (1-1); The anti-loosening structure (3) includes a limiting ring (3-1) in the shape of a regular polygon and used to fit and extend on the limiting part (2-1), and two metal limiting springs (3-2) symmetrically arranged on the limiting ring (3-1) and used to be embedded in the two opening slots therein, respectively. The end of the metal limiting spring (3-2) away from the limiting sleeve is integrally provided with a limiting protrusion (3-2-1) for being embedded in the limiting groove (1-2); During the installation of the limiting sleeve on the limiting part (2-1), the end of the metal limiting spring (3-2) is first deformed by force and then abuts against the periphery of the limiting shaft (1-1). Then, during the recovery deformation process, the limiting protrusion (3-2-1) is embedded in the limiting groove (1-2).

2. The anti-loosening hot forged bolt (1) assembly according to claim 1, characterized in that: The metal limiting spring (3-2) extends upward at the end away from the limiting sleeve, tilting towards the limiting shaft (1-1).

3. The anti-loosening hot forged bolt (1) assembly according to claim 1, characterized in that: The extension and retraction range of the limiting ring (3-1) on the limiting part (2-1) is 5-10mm.

4. The anti-loosening hot forged bolt (1) assembly according to claim 1, characterized in that: The limiting ring (3-1) has two pressing pieces (3-1-1) symmetrically arranged on its circumference.

5. The anti-loosening hot forged bolt (1) assembly according to claim 1, characterized in that: The nut (2) has six surfaces around its periphery, and the number of limiting grooves (1-2) is six.

6. The anti-loosening hot forged bolt (1) assembly according to claim 1, characterized in that: The inner ring of the limiting part (2-1) is provided with an annular groove (2-2), and an annular rubber ring (2-3) is embedded in the annular groove (2-2). During the process of tightening the nut (2) onto the bolt (1), the annular rubber ring (2-3) abuts against the threaded part of the bolt (1) after deformation.

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