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Double-eccentric crank thread anti-loosening device

A double eccentric, threaded technology, applied in the direction of threaded fasteners, screws, nuts, etc., can solve the problems of loosening, low reliability of nut pads, difficult processing, etc. Implement easy effects

Active Publication Date: 2014-09-03
CHINA NAT HEAVY MACHINERY RES INSTCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many existing anti-loosening technologies for nuts, but the anti-loosening of large nuts used in places with high strength, large loads and repeated shocks is still a key technical problem
Several existing anti-loosening methods, such as the use of large round nuts and nut washers, are difficult to process, and the reliability of the nut washers is not high under repeated high-strength impact loads; methods such as double nuts or internal thread locking screws It is also prone to loosening under the action of large axial force

Method used

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  • Double-eccentric crank thread anti-loosening device
  • Double-eccentric crank thread anti-loosening device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] like figure 1 , 2 The shown double eccentric crank thread anti-loosening device includes a threaded screw 2, on which a nut 4 matched with the threaded screw 2 is sleeved, and a crank 3, one end of the crank 3 is provided with a thread, and the side of the nut 4 is A tapered hole 6 is provided on the top, and the surface of the small diameter of the tapered hole 6 is located on the same surface as the outer surface of the nut 4, and the top end surface of the threaded rod 2 is provided with an eccentric hole 5;

[0017] The threaded end of the crank 3 extends through the tapered hole 6 to the outside of the nut 4 and is locked by the locking nut 1 , and the other end of the crank 3 is inserted into the eccentric hole 5 .

[0018] When the nut 4 and the threaded screw 2 are tightened, the crank 3 goes deep into the nut 4 from the tapered hole 6, and is inserted into the eccentric hole 5, and then locked with the lock nut 1, the crank 3 reaches the nut lock. For the pur...

Embodiment 2

[0020] In the above example, if figure 1 , 2 The double eccentric crank thread anti-loosening device has two cranks 3, two locking nuts 1 fitted on the cranks 3, and two corresponding tapered holes 6 and eccentric holes 5 on the side of the nut 4. The eccentric hole 5 is arranged symmetrically on both sides of the center line of the screw rod 2, the tapered hole 6 is on the same generatrix of the nut 4, one end of the two cranks 3 is put into the tapered hole 6, and the other end is put into the eccentric hole 5 Among them, when the nut 4 rotates in place, use the lock nut 1 to lock and lock it, and the crank 3 can achieve the purpose of the nut 4 from rotating. Using two cranks 3 and symmetrical eccentric holes 5 can better align the nut 4 with the thread Screw rod 2 is locked after being tightened. When the two cranks 3 are arranged symmetrically, the threaded side of one crank 3 will always retract along the tapered hole 6, and its retraction is restrained by locking the l...

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Abstract

The invention provides a double-eccentric crank thread anti-loosening device which comprises a threaded lead screw sleeved with a nut matched with the threaded lead screw. The device further comprises a crank, one end of the crank is provided with threads, the side face of the nut is provided with a taper hole, the small-aperture face of the taper hole and the outer side face of the nut are located on the same plane, and the end face of the top of the threaded lead screw is provided with an eccentric hole; the end, provided with the threads, of the crank penetrates through the taper hole, extends out of the nut and is locked through a locking nut, and the other end of the crank is inserted into the eccentric hole. The device is good in anti-loosening effect and easy to machine and use. The mechanism that when the eccentric crank rotates along with the nut, the crank will move in a reciprocating mode along with the nut is fully used, the moving tendency of the nut is prevented structurally, and accordingly the aim of completely preventing the threads from loosening is achieved. As for some large elements, particularly in some occasions where vibration impact is large, thread loosening caused by repeat vibration impact is effectively prevented, and a good use effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical equipment, and in particular relates to a double eccentric crank thread anti-loosening device suitable for occasions with relatively large vibration and impact. Background technique [0002] There are many kinds of existing anti-loosening technologies for nuts, but the anti-loosening of large nuts used in places with high strength, large loads and repeated shocks is still a key technical problem. Several existing anti-loosening methods, such as the use of large round nuts and nut washers, are difficult to process, and the reliability of the nut washers is not high under repeated high-strength impact loads; methods such as double nuts or internal thread locking screws It is also prone to loosening under the action of a large axial force. Contents of the invention [0003] In view of the above problems, the present invention provides an eccentric crank thread anti-loosening device with good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B39/04
Inventor 周文浩赵西韩马强刘磊王仕杰
Owner CHINA NAT HEAVY MACHINERY RES INSTCO
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