A kind of stop nut assembly
This utility model is related to a kind of stop nut assembly.
Screw bolt and nut is usually used in the fixation of two or more joint portion, be unable to do without securing member in being linked and packed.Securing member
Bring conveniently to mechanical industry, but it has an inevitable weakness, that is, in the environment of high vibration and varying load
Can voluntarily get loose, cause part or complete device damage, a disintegration, very cause to lead to security incident.For solving securing member
Get loose problem, from the beginning of threaded fastener is born, in the world the scientists and engineers of many countries made substantial amounts of test and
Grind.Stop nut originates from abroad, and it is to be attached on screw thread so that special engineering plastics are permanent, so that internal and external threads is being tightened
During engineering plastics be extruded and produce powerful counteracting force, substantially increase the frictional force between internal and external threads, carry
Supply the absolute resistance to vibration.This resistance is fully distributed in the whole engaged section of internal and external threads, and this frictional force with interior
Constrictive pressure between external screw thread is unrelated, retaining method different from the past, and that leans on is pressure after screw tightens and produces
Frictional force plays retaining effect, once screw is slightly loose, pressure reduces, and frictional force rapidly disappears and loses retaining effect, so that spiral shell
Silk gets loose.But the locking mode of plastics is affected by environment to be required it is impossible to meet high temperature and severe cold.The anti-loose measure of existing state female thread
Method has multiple, and the method wherein increasing frictional force is embedding just like setting spring washer, double nut, lock washer, binding nut, nylon
Methods such as part, chemical gluing etc., but under heavy duty, high vibration, severe environmental conditions, reliability is unstable；Mechanical anti-loose method
Just like slotted nut, split pin, stop washer, steel wire concatenation, concave cone locking etc., but some architectural limitation it is impossible to repeat to make
With；Construction anti-loose method has cone pressure tight-holding type locking, because manufacture is complicated, high cost can not extensively be applied and big in torsion
In the case of main body fracture occurs, damages phenomenon it is impossible to basic solve problem and have potential safety hazard, not to mention adapt to railway
This high standard of electrified contacting netses, the requirement of complex condition are it is necessary to explore a kind of new loosing Prevention Technology.And at present
The anti-loosing effect phase of stop nut be on duty, long-time using the rear disengagement that mother nut, locking nut and bolt easily occur.
Content of the invention
This utility model provides a kind of stop nut assembly, and it not only can improve the performance of locking anti-disengagement, and
Structure is simple, long service life.
This utility model employs technical scheme below：A kind of stop nut assembly, it includes mother nut, screw rod and locking
Nut, mother nut is enclosed within screw rod, is provided with female thread I inside described mother nut, and female thread I and the screw rod of mother nut are provided with
External screw thread II matches, and the surface in described mother nut stage casing is provided with external screw thread I, and external screw thread I is fine thread, described locking
It is provided with female thread II, female thread II is fine thread, locking nut passes through the female thread II of locking nut inside the front end of nut
Cooperation rear enclosure is in mother nut and the external screw thread I in mother nut stage casing between, and the tail end of mother nut is provided with effective cylinder, described main spiral shell
It is step-like transition between female stage casing and effective cylinder of mother nut tail end, the rear end of locking nut is provided with and the having of mother nut
The interior load wall that effect cylinder fits, has, on the surface of effective cylinder, the groove that twice are parallel to each other at external screw thread I.
Described twice groove is symmetrically distributed on effective cylinder, and twice groove is to be radially arranged.Described two are parallel to each other
The notch setting in opposite direction of twice groove.Described interior load wall thickness is 1-5mm.Front end outside described mother nut sets
It is set to outer hexagon shape, the outside of locking nut is set to outer hexagon shape, the outer hexagon shape of mother nut and locking nut
Outer hexagon shape is consistent.The described end face of effective cylinder tail end is contacted with the interior load wall of locking nut.
The leading portion end face of described effective cylinder is connected with one section of end face transition by one section of tangent plane with angle or arc.
This utility model has the advantages that：After employing above technical scheme, it can improve locking further
Anti-loosing effect between each part of nut, and self-locking property is good, difficult for drop-off, in addition this utility model structure simple and
Stability Analysis of Structures is good, and long service life is reusable, and the leading portion end face of effective cylinder is by one section of tangent plane with angle or arc
It is connected with one section of end face transition, so phenomenon that is viscous and killing can be occurred with mode locking nut when oppressing effective cylinder.
The surface in mother nut stage casing of the present utility model is provided with external screw thread I, and external screw thread I is fine thread, before described locking nut
End is internal to be provided with female thread II, and female thread II is fine thread, and locking nut passes through female thread II and the mother nut of locking nut
Between the external screw thread I in stage casing, cooperation rear enclosure, in mother nut, is completely embedded due to when fine thread coordinates, improves locking property further
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of this utility model mother nut.
Fig. 3 is the structural representation of this utility model locking nut.
Fig. 4 is the side schematic view of Fig. 1.
In Fig. 1, Fig. 2, Fig. 3 and Fig. 4, this utility model provides a kind of stop nut assembly, it include mother nut 1,
Screw rod 2 and locking nut 3, mother nut 1 is enclosed within screw rod 2, is provided with female thread I 4 inside described mother nut 1, mother nut 1 interior
The external screw thread II 5 that screw thread I 4 is provided with screw rod 2 matches, and the surface in described mother nut 1 stage casing is provided with external screw thread I 6, external screw thread
I 6 is fine thread, is provided with female thread II 7 inside the described front end of locking nut 3, and female thread II 7 is fine thread, locking
It is in mother nut 1, main that nut 3 passes through cooperation rear enclosure between the female thread II 7 of locking nut 3 and the external screw thread I 6 in mother nut 1 stage casing
The tail end of nut 1 is provided with effective cylinder 8, is platform between effective cylinder 8 of the described stage casing of mother nut 1 and mother nut 1 tail end
Scalariform transition, the rear end of locking nut 3 is provided with the interior load wall 10 fitting with effective cylinder 8 of mother nut 1, in effective cylinder
8 surface has the groove 9 that twice are parallel to each other at external screw thread I 6, and described twice groove 9 is symmetrically distributed in effective cylinder 8
On, twice groove 9 is to be radially arranged, the notch setting in opposite direction of described two twice grooves 9 being parallel to each other, described interior load
Wall 10 thickness is 1-5mm, and the described front end outside mother nut 1 is set to outer hexagon shape, and the outside of locking nut 3 is set to
Outer hexagon shape, the outer hexagon shape of mother nut 1 is consistent with the outer hexagon shape of locking nut 3, described effective cylinder 8 tail end
End face contact with the interior load wall 10 of locking nut 3, the leading portion end face of described effective cylinder 8 by one section of band angle or
The tangent plane of arc is connected with one section of end face transition.