Double-nut connecting fastener

Abstract

The utility model provides a double-nut connecting fastener which comprises two coaxial nut bodies which are fixed at intervals in the axial direction, the nut bodies are connected through a plurality of connecting rods which are arranged at intervals in the circumferential direction, and the two ends of each connecting rod are welded to inserting holes of the corresponding nut body. Long rods are in threaded connection with the interiors of the two nut bodies respectively, the ends of the long rods extend to the area between the two nut bodies and are provided with connecting holes, U-shaped connecting pieces penetrate through the connecting holes, and the two ends of each U-shaped connecting piece are connected with nuts to serve as locking pieces. Thread directions of the inner side walls of the two nut bodies are opposite. According to the fastener, the double nuts are combined and connected with the U-shaped connecting piece, and the connecting rod structure and the reverse thread design between the nut bodies are matched, so that the long rod is restrained from multiple dimensions, stress is uniformly dispersed, the long rod is effectively prevented from loosening, and the connecting stability is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of hardware fastener technology, specifically to a double nut connecting fastener. Background Technology

[0002] In the field of mechanical connections, it is often necessary to securely connect two long rods. Currently, a common connection method is to use elongated nuts, screwing the two long rods into the nuts and connecting them through threaded engagement. This connection method can meet basic fixed connection requirements to a certain extent and is widely used in many conventional mechanical devices. For example, in scenarios such as the erection of simple construction scaffolding and the assembly of frames for ordinary mechanical equipment, this method of connecting long rods with elongated nuts is widely used due to its relatively simple operation and low cost.

[0003] However, in actual use, the defects of this connection method gradually become apparent when the connection is subjected to vibration. Under vibration, the threaded connection between the long rod and the long nut is prone to relative displacement, leading to loosening of the connection. This loosening occurs frequently. Loosening not only affects the normal operating accuracy of mechanical equipment and reduces its service life, but in severe cases, it can even lead to equipment failure and safety accidents. Utility Model Content

[0004] In view of the problems pointed out in the background art, this utility model proposes a double nut connecting fastener to solve the above-mentioned technical problems.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A double-nut fastener includes two nut bodies, which are axially spaced and fixedly connected. Each nut body has a long rod threadedly connected to it. The ends of the two long rods extend into the area between the two nut bodies, and the ends of the long rods have connecting holes. The fastener also includes a U-shaped connector that connects to the connecting holes on the two long rods.

[0007] The present invention is further provided with a connecting rod between the two nut bodies, and the two ends of the connecting rod are respectively welded to the nut bodies.

[0008] The present invention is further provided that the nut body is provided with a plug hole for connecting to the connecting rod.

[0009] The present invention is further configured such that multiple connecting rods are provided and are spaced apart circumferentially on the nut body.

[0010] The present invention is further configured such that both ends of the connector protrude from the connecting hole, and locking elements are connected to both ends of the connector.

[0011] The present invention is further configured such that the locking member is a nut that can be threadedly connected to the end of the connecting member.

[0012] The present invention is further configured such that the threads on the inner sidewalls of the two nut bodies are arranged in opposite directions.

[0013] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0014] The double-nut fastener provided by this utility model has two long rods that are threadedly connected to the bodies of two nuts respectively, and then the two long rods are fixedly connected by a U-shaped connector, thereby preventing the long rods from loosening.

[0015] The innovation of this application lies in the fact that the two nut bodies are spaced apart, and the long rod extends between the two nut bodies and is then fixed by the U-shaped connector. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is an exploded view of the present invention.

[0019] Figure 3 This is a cross-sectional view of the present invention.

[0020] Figure 4 This is an exploded view of the present invention. Figure 2 .

[0021] The following are the labels in the attached diagram: 1. Nut body; 2. Long rod; 3. Connecting hole; 4. Connecting piece; 5. Connecting rod; 6. Insertion hole; 7. Locking piece. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] For reference as follows Figures 1-4 The present invention will be described as follows:

[0024] Example: A double-nut fastener includes two nut bodies 1, which are coaxially arranged and axially spaced apart and fixedly connected. This design breaks the conventional connection mode of traditional single nuts or long nuts.

[0025] Two long rods 2 are threadedly connected to the two nut bodies 1 respectively. The two nut bodies 1 provide independent and stable threaded connection interfaces for the long rods 2. Compared with the traditional long nut that connects the long rod through a single thread, the double threaded connection structure formed by the two nut bodies 1 and the long rods 2 increases the reliability of the connection to a certain extent.

[0026] The ends of the two long rods 2 extend into the area between the two nut bodies 1. The ends of the long rods 2 are provided with connecting holes 3, which penetrate the radial direction of the long rods 2, providing an installation base for subsequent fastening operations.

[0027] It also includes a U-shaped connector 4, which connects to the connection holes 3 on the two long rods 2. Through this mechanical connection, the two long rods 2 are rigidly connected in space.

[0028] When the connection is subjected to external forces such as vibration, traditional threaded connections are prone to loosening due to relative rotation between the long rod and the nut caused by vibration. However, in this invention, due to the fixed constraint of the U-shaped connector 4 on the two long rods 2, the long rods 2 cannot generate relative rotation or axial displacement within the nut body 1. Even if one of the long rods 2 is subjected to vibration and tends to loosen, the other long rod 2 will exert a restraining force on it through the connection of the U-shaped connector 4, preventing loosening and thus achieving a stable connection between the two long rods.

[0029] Compared with existing technologies, this utility model has significant innovative advantages. On the one hand, the combination structure of the double nut and the U-shaped connector constrains the long rod from multiple dimensions, greatly improving the anti-loosening performance compared with the traditional long nut connection method. On the other hand, this structural design does not require additional complex anti-loosening accessories, such as anti-loosening washers, which reduces manufacturing costs and installation complexity while ensuring connection stability. It has high practicality and economy and is suitable for various mechanical connection scenarios with high requirements for connection stability.

[0030] A connecting rod 5 is provided between the two nut bodies 1, further enhancing the stability of the overall structure. Both ends of the connecting rod 5 are welded to the nut bodies 1. This connection method forms a robust rigid connection, ensuring that the two nut bodies 1 maintain a fixed axial spacing and coaxiality during use.

[0031] The nut body 1 is provided with a insertion hole 6 for connecting to the connecting rod 5. This provides precise positioning for the installation of the connecting rod 5, facilitates accurate placement of the connecting rod 5 before welding, ensures assembly accuracy, and improves production efficiency.

[0032] Multiple connecting rods 5 are provided and spaced circumferentially around the nut body 1. This layout optimizes the force distribution between the nut bodies 1 from a mechanical perspective. When subjected to external forces, the multiple connecting rods 5 can evenly distribute the stress, preventing damage to a single connection point due to force concentration. This significantly enhances the impact and deformation resistance of the connection structure between the two nut bodies 1, further improving the overall structural strength and reliability of the double-nut fastener.

[0033] Both ends of the connector 4 protrude from the connecting holes 3, and locking elements 7 are connected to both ends of the connector 4. The locking elements 7 are nuts that can be threaded into the ends of the connector 4. When the two ends of the U-shaped connector 4 are inserted into the connecting holes 3 of the long rod 2, tightening the nuts on the ends of the connector 4 creates an axial constraint on the connector 4, preventing it from coming out of the connecting holes 3. This locking structure adds a layer of security to the connection of the long rod 2, ensuring that the connector 4 and the long rod 2 remain stably connected even under long-term vibration or complex external forces, effectively preventing connection failure of the long rod 2 due to loosening of the connector 4.

[0034] The threads on the inner walls of the two nut bodies 1 are arranged in opposite directions. This is another innovation in the anti-loosening function of this fastener. When the two long rods 2 are screwed into the two nut bodies 1 respectively, due to the opposite thread directions, when a loosening tendency occurs due to vibration or external force, the loosening directions of the two long rods 2 are opposite. This design makes the long rods 2 mutually restrain each other, further suppressing the loosening tendency of the long rods 2. For example, when one long rod 2 has a loosening tendency to rotate clockwise due to vibration, the other long rod 2 will have a loosening tendency to rotate counterclockwise. The connection of the two long rods 2 through the U-shaped connector 4 will form opposite resisting forces against each other, thereby greatly improving the anti-loosening effect and significantly enhancing the stability and reliability of the connection compared to the traditional same-direction thread connection method.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual nut connection fastener comprising a nut body, characterized by: The nut body is provided with two, two nut body axial spacing and fixed connection, two nut body respectively threaded with long rod, two long rod end respectively to the region between two nut body, long rod end is equipped with connecting hole, also includes U-shaped connecting piece, connecting piece and two long rod connecting hole connection.

2. A dual nut connection fastener according to claim 1, wherein: Two nut body between the connecting rod connecting both ends respectively with nut body welding.

3. A dual nut connection fastener according to claim 2, wherein: The nut body is provided with and connecting rod connecting plug hole.

4. A dual nut connection fastener according to claim 2, wherein: The connecting rod is provided with a plurality of and in the nut body circumferential spacing.

5. A dual nut connection fastener according to claim 1, wherein: The connecting piece is provided with two ends from the connecting hole, and the connecting piece is provided with a locking piece.

6. A dual nut connection fastener according to claim 5, wherein: The locking piece is a nut capable of being screwed with the end of the connecting piece.

7. A dual nut connection fastener according to claim 1, wherein: The threads on the inner side walls of the two nut bodies are oppositely arranged.

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