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a nut

A nut and nut body technology, applied in nuts, bolts, threaded fasteners, etc., can solve the problems of inadvertent disassembly, high cost, complex structure, etc.

Active Publication Date: 2017-10-17
QINGDAO TAINO FULUN MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned nuts have the following problems in practical application: (1) complex structure and high cost; (2) because the front end face of the fastening cap is embedded in the rear end face of the front nut body, it is necessary to disassemble the fastening cap in some cases. The torque required for the cap and the nut body is greater than the torque required for disassembling the nut body and the bolt. It is easy to disassemble the bolt and the nut body when disassembly occurs by mistake, so that the effect of preventing accidental disassembly cannot be achieved. This phenomenon occurs in a humid environment. This is especially noticeable when used in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] combine figure 1 and figure 2 As shown, a nut includes a nut body and a nut 1. The nut body is composed of front and rear sections, wherein, the nut body of the front section is represented by number 2, and the nut body of the rear section is represented by number 3.

[0024] Internal threads are provided on the front nut body 2 for connecting with bolts.

[0025] A limiting portion 4 is provided at the end of the front nut body 2 for blocking the nut 1 . The frontmost position of the nut 1 during movement can be limited by the limiting portion 4 . Specifically, the diameter of the limiting portion 4 is larger than the outer diameter of the rear nut body 3 .

[0026] An external thread 6 is provided on the rear nut body 3 . The external thread 6 matches the internal thread 5 provided on the nut 1, and the nut 1 and the rear nut body 3 are threadedly connected.

[0027] The nut 1 can adopt a hexagonal nut that is easy to cooperate with a wrench.

[0028] The nut ...

Embodiment 2

[0030] combine image 3 and Figure 4 As shown, except that the nut in the second embodiment is different from the first embodiment in the following technical features, other technical features can refer to the first embodiment above.

[0031] The rear nut body 3 includes a smooth section 7 and a threaded section 8 arranged in sequence from front to back. Wherein, the smooth section 7 is an unthreaded section, and the external thread 6 is arranged in the threaded section 8 .

[0032] The smooth section 7 acts as a force-relief area, and its function is to reduce the torque required for the separation between the nut 1 and the limiting part 4, thereby effectively preventing accidental disassembly between the bolt and the nut body.

[0033] Its general working principle is:

[0034] When the pipeline is connected, use a wrench to fasten the bolt and keep it in a static state, use another wrench to twist the nut 1 forward, and when the front end of the nut 1 is pressed against...

Embodiment 3

[0041] combine Figure 5 and Image 6 As shown, the nut in this embodiment 3 is different from that of embodiment 2 except for the following technical features, and other technical features can refer to the above embodiment 2.

[0042]The rear nut body 3 further includes a limiting segment 10 , and the limiting segment 10 is located on the rear side of the threaded segment 8 . Inside the limiting section 10, there is a nut anti-dropping part, which is used to prevent the nut 1 from slipping off due to wrong disassembly when the pipeline is installed vertically.

[0043] The anti-falling part of the nut includes a limit groove 11 and a limit ring 12 . The limiting slot 11 is provided on the limiting segment 10 , and the limiting slot 11 is arranged around the rear nut body 3 . The limiting ring 12 is adapted to the limiting groove 11 and installed in the limiting groove 11 .

[0044] The above-mentioned nut anti-dropping component has the advantages of simple structure, low...

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PUM

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Abstract

The invention discloses a nut, which comprises a nut body and a nut. The nut body is composed of a front section and a rear section. The nut body of the front section is provided with internal threads; Position part, the diameter of the limit part is greater than the outer diameter of the rear nut body; the rear nut body is provided with an external thread matching the internal thread of the nut, and the thread is between the nut and the rear nut body. connect. When connecting the pipeline, use a wrench to fasten the bolt and keep it in a static state, and use another wrench to twist the nut forward. When the front end of the nut is pressed against the limit part, continue to apply torque. At this time, the nut will drive the nut body to rotate as a whole until it is fastened with the bolt; in the event of disassembly by mistake, it can effectively prevent the nut body and the bolt from being disassembled. The invention has simple structure, convenient operation and low cost.

Description

technical field [0001] The invention relates to a nut. Background technique [0002] In pipeline connection, bolts and nuts are often used as connectors. The specific implementation method is: weld a section of pipeline to be connected on the bolt, insert another section of pipeline to be connected into the nut, and turn the bolt And the nut realizes the connection of two sections of pipelines. However, in some special fields, such as the field of compressors and automobiles, refrigerants, high-temperature and high-heat gases or liquids often flow in the pipelines. If the pipeline connection nuts and bolts are accidentally disassembled during normal operation or maintenance of the machine, it is easy to cause air to be mixed into the refrigerant pipeline, or high-temperature and high-heat gas or liquid to flow out, causing unnecessary safety hazards. Based on the above reasons, the prior art provides a nut that prevents accidental disassembly. [0003] The nut mainly incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B37/00F16B41/00
CPCF16B37/00F16B41/005
Inventor 陶二虎
Owner QINGDAO TAINO FULUN MACHINERY CO LTD
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