Lock bolt for electric power fitting

Abstract

The utility model discloses a lock bolt for electric power fittings, which comprises a bolt, a right-hand thread nut and a left-hand thread nut, the bolt is an integral body, a bolt head, a screw rod, a right-hand thread rod and a left-hand thread rod are sequentially arranged from a large head end to a screw end tail, the diameter of the left-hand thread rod is smaller than that of the right-hand thread rod, and the right-hand thread nut is connected with the right-hand thread rod. The left-hand threaded rod and the right-hand threaded rod are eccentrically arranged, the right-hand nut is provided with a conical surface boss, the left-hand nut is provided with a conical surface groove, the right-hand nut is meshed with the right-hand threaded rod, the left-hand nut is meshed with the left-hand threaded rod, and the right-hand nut is meshed with the right-hand threaded rod. The conical surface boss of the right-hand thread nut can be inserted into the conical surface groove of the left-hand thread bolt. Through the unique structural design, the anti-loosening performance of the bolt is effectively improved, the reliability of electric power fitting connection is ensured, meanwhile, the manufacturing cost is reduced, and installation and maintenance are convenient.

Description

Technical Field

[0001] This application relates to the field of fastener technology, and more specifically to an anti-loosening bolt for power fittings. Background Technology

[0002] In power systems, power fittings are crucial components for connecting and securing various electrical equipment, and their reliability directly impacts the safe and stable operation of the power system. Bolts, commonly used fasteners in power fittings, are prone to loosening during long-term operation due to external forces such as vibration and impact, leading to connection failures and potential safety accidents.

[0003] Currently, some common anti-loosening bolts on the market have poor anti-loosening effects and cannot meet the requirements of long-term stable operation of power systems; others have complex structures, high manufacturing costs, and are inconvenient to install and maintain. Therefore, there is an urgent need for an anti-loosening bolt for power fittings that has a simple structure, good anti-loosening effect, and low cost. Utility Model Content

[0004] In view of this, this application provides an anti-loosening bolt for power fittings. Through a unique structural design, it effectively improves the anti-loosening performance of the bolt, ensures the reliability of power fitting connections, and at the same time reduces manufacturing costs and facilitates installation and maintenance.

[0005] According to one aspect of this application, one embodiment provides an anti-loosening bolt for power fittings, comprising a bolt, a positive thread nut, and a negative thread nut. The bolt is a single unit, and from the large end to the screw end, it consists of a bolt head, a screw rod, a positive thread rod, and a negative thread rod. The diameter of the negative thread rod is smaller than that of the positive thread rod. The negative thread rod is eccentrically disposed from the positive thread rod. The positive thread nut has a conical boss, and the negative thread nut has a conical groove. The positive thread nut engages with the positive thread rod, and the negative thread nut engages with the negative thread rod. The conical boss of the positive thread nut can be inserted into the conical groove of the negative thread nut.

[0006] In some embodiments, the length of the positive thread rod is 0.8-1.2 times the thickness of the positive thread nut with the wedge-shaped boss.

[0007] In some embodiments, the eccentricity between the reverse threaded rod and the forward threaded rod is 0.3-2.0 mm.

[0008] In some embodiments, the bolts, positive thread nuts, and negative thread nuts are made of carbon steel, alloy steel, stainless steel, titanium, or titanium alloy.

[0009] In some embodiments, the bolts, positive thread nuts, and negative thread nuts, after being made of carbon steel or alloy steel, require galvanizing or zinc-diffusion anti-corrosion treatment.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. The anti-loosening bolt for power fittings of this utility model, through the mutual cooperation of the conical boss of the positive thread nut and the conical groove of the negative thread nut, and the eccentric setting of the positive thread rod and the negative thread rod, so that when subjected to external force, the positive thread nut and the negative thread nut will generate mutually restraining torque, effectively preventing the nut from loosening and greatly improving the anti-loosening performance.

[0012] 2. The anti-loosening bolt for power fittings of this utility model has a clever and simple structure design compared to some complex anti-loosening structures. It is easy to manufacture and process, thus reducing production costs.

[0013] 3. The present invention relates to an anti-loosening bolt for power fittings. The installation process of the anti-loosening bolt is similar to that of ordinary bolts, requiring no special tools or complicated operations. At the same time, maintenance is also relatively convenient, reducing installation and maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 3 This is a schematic diagram of the bolt of this utility model.

[0017] In the diagram: 1. Bolt; 11. Bolt head; 12. Screw; 13. Threaded rod; 14. Threaded rod; CL1. Threaded rod axis; CL2. Threaded rod axis; 2. Threaded nut; 21. Conical boss; 3. Threaded nut; 31. Conical groove. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0019] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0020] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages).

[0021] Example 1:

[0022] Please refer to Figure 1 , Figure 2 and Figure 3 Bolt 1, positive thread nut 2, and negative thread nut 3 are made of carbon steel.

[0023] The large end of bolt 1 is bolt head 11, which is a hexagonal head used for tightening with a wrench. After bolt head 11 are screw 12, positive thread 13 and negative thread 14.

[0024] The diameter of the reverse thread rod 14 is smaller than that of the normal thread rod 13. If the normal thread rod 13 is M18, then the reverse thread rod 14 is M14. The distance between the axis LC1 of the normal thread rod and the axis CL2 of the reverse thread rod is 0.6mm.

[0025] The length of the positive thread rod 13 is set to be 1 times the thickness of the wedge-shaped boss inside the positive thread nut 2.

[0026] A conical boss 21 is machined inside the positive thread nut 2. The conical boss 21 is coaxial with the positive thread nut 2. A conical groove 31 is machined in the negative thread nut 3 to mate with the conical boss 21. The conical groove 31 is coaxial with the negative thread nut.

[0027] Finally, the bolts 1, the positive thread nut 2, and the negative thread nut 3 made of carbon steel are galvanized to improve their corrosion resistance.

[0028] During installation, screw the positive thread nut 2 into the positive thread rod 13 and the negative thread nut 3 into the negative thread rod 14, so that the conical boss 21 of the positive thread nut 2 is inserted into the conical groove 31 of the negative thread nut 3.

[0029] When this anti-loosening bolt was applied to the connection of electrical fittings, it remained in good tightness even after long-term vibration and impact, demonstrating excellent anti-loosening effect.

[0030] Example 2:

[0031] Bolt 1, positive thread nut 2, and negative thread nut 3 are made of alloy steel.

[0032] The diameter of the reverse thread rod 14 is smaller than that of the normal thread rod 13. If the normal thread rod 13 is M18, then the reverse thread rod 14 is M12. The axis of the normal thread rod is LC1. Figure 2 The red line in the middle) and the axis CL2 of the reverse thread rod ( Figure 2 The distance between the yellow lines in the diagram is 1.2 mm, and the length of the positive thread rod is 0.9 times the thickness of the wedge-shaped boss inside the positive thread nut.

[0033] After manufacturing, the alloy steel parts undergo zinc plating for corrosion protection.

[0034] The anti-loosening bolt was installed at the hardware connection point of the power tower. After a period of use, the anti-loosening bolt did not loosen, and the connection was firm and reliable, meeting the requirements for safe operation of the power system.

[0035] Example 3:

[0036] Bolt 1, threaded nut 2, and reverse threaded nut 3 are made of titanium.

[0037] The diameter of the reverse thread rod 14 is smaller than that of the normal thread rod 13. If the normal thread rod 13 is M18, then the reverse thread rod 14 is M11. The distance between the axis LC1 of the normal thread rod and the axis CL2 of the reverse thread rod is 2.0 mm. The length of the normal thread rod is 1.2 times the thickness of the wedge-shaped boss inside the normal thread nut.

[0038] Since stainless steel itself has good corrosion resistance, no additional anti-corrosion treatment is required.

[0039] When this anti-loosening bolt was applied to electrical fittings in coastal areas, it maintained good tightening and anti-loosening performance even in harsh environments with high salt spray, and no obvious corrosion was observed, proving that the anti-loosening bolt has strong environmental adaptability.

[0040] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. An anti-loosening bolt for power fittings, characterized in that: The device includes a bolt (1), a straight thread nut (2), and a reverse thread nut (3). The bolt (1) is a single unit, consisting of a bolt head (11), a screw (12), a straight thread rod (13), and a reverse thread rod (14) from the large end to the screw end. The diameter of the reverse thread rod (14) is smaller than that of the straight thread rod (13). The reverse thread rod (14) is eccentrically positioned with respect to the straight thread rod (13). The straight thread nut (2) has a conical boss (21), and the reverse thread nut (3) has a conical groove (31). The straight thread nut (2) engages with the straight thread rod (13), and the reverse thread nut (3) engages with the reverse thread rod (14). The conical boss (21) of the straight thread nut (2) can be inserted into the conical groove (31) of the reverse thread nut (3).

2. The anti-loosening bolt for power fittings according to claim 1, characterized in that: The length of the positive thread rod (13) is 0.8-1.2 times the thickness of the wedge-shaped boss inside the positive thread nut (2).

3. The anti-loosening bolt for power fittings according to claim 1, characterized in that: The eccentricity between the reverse thread rod (14) and the positive thread rod (13) is 0.3-2.0 mm.

4. The anti-loosening bolt for power fittings according to any one of claims 1-3, characterized in that: The bolt (1), the positive thread nut (2), and the negative thread nut (3) are made of carbon steel, alloy steel, stainless steel, titanium, or titanium alloy.

5. The anti-loosening bolt for power fittings according to claim 4, characterized in that: The bolts (1), positive thread nuts (2), and negative thread nuts (3) are made of carbon steel or alloy steel and require galvanizing or zinc-diffusion anti-corrosion treatment.

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