CN213575097U - Self-locking nut mechanical anti-loosening structure - Google Patents
Self-locking nut mechanical anti-loosening structure Download PDFInfo
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- CN213575097U CN213575097U CN202022531166.XU CN202022531166U CN213575097U CN 213575097 U CN213575097 U CN 213575097U CN 202022531166 U CN202022531166 U CN 202022531166U CN 213575097 U CN213575097 U CN 213575097U
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Abstract
The utility model relates to a self-locking nut mechanical anti-loosening structure, which comprises a valve shaft and a nut component, wherein one end of the valve shaft is provided with a first external thread section and a second external thread section, and the thread rotating directions of the first external thread section and the second external thread section are opposite; the nut component comprises a fastening nut, a locking piece and a locking nut, the thread directions of the fastening nut and the locking nut are opposite, the fastening nut is in threaded connection with the first external thread section, the locking nut is in threaded connection with the second external thread section, the locking piece is arranged between the fastening nut and the locking nut, and the fastening nut and the locking nut are fixed with the locking piece. The utility model discloses lock nut screw thread direction is opposite with fastening nut screw thread direction, and is connected with the locking piece between lock nut and the fastening nut, and the locking piece makes fastening nut and lock nut can not relative motion, reaches the locking target of fastening nut, and this structure machinery locking is difficult for becoming invalid, and locking effectual can not destroy the screw pair yet.
Description
Technical Field
The utility model belongs to the technical field of machinery is locking, especially, relate to a structure is prevented loosing by auto-lock nut machinery.
Background
The thread fastening structure is widely applied to various industries, the anti-loosening requirement is higher and higher, the anti-loosening methods are more and more, and people continuously pursue the thread anti-loosening structure which is simple in structure, convenient to assemble and disassemble, reliable in work and suitable in cost. When the thread coupling widely applied in engineering mechanical equipment is impacted, vibrated, subjected to variable load and subjected to temperature change, the thread coupling may loosen or even completely separate, so that accidents are caused. Therefore, corresponding thread locking measures must be taken when designing the threaded connection. The anti-loosening measures are many, and can be divided into 3 types of friction anti-loosening, direct locking anti-loosening and thread pair damage anti-loosening according to the action principle, and in addition, a Tang thread is provided in the 90 s of the last century.
Friction lock, i.e. trying to increase the pressure and friction between the thread pairs to prevent relative rotation. The friction type anti-loose structure of the underwater clamp connector disclosed in the chinese patent CN110594274A comprises a clamping hand, a clamping hand fixing plate, a clamping hand rotating block, a threaded rod, a threaded sleeve, a torsion joint, a guide plate, and a pressing plate. The contact surface of the clamping hand and the clamping hoop connector, which is close to the bolt, is provided with reticulate patterns and knurls, so that the friction coefficient of the clamping hand and the close bolt can be increased; however, regardless of the frictional force, the anti-loosening measure fails as long as the external force exceeds the frictional force.
The direct locking and anti-loosening are realized by using metal elements which are convenient to replace to restrain a thread pair. For example, bolts and nuts are constrained to each other by cotter pins, a set of screw heads are constrained to each other by wires, a washer is stopped, and the like. These measures are not effective and require a certain position of the coupling member.
Breaking the thread pair relationship to prevent loosening is to convert the thread pair into a non-kinematic pair, thereby eliminating the possibility of relative rotation. For example, a punching nut disclosed in chinese patent publication No. CN 202500877U includes a hexagonal nut body, where any side surface of the hexagonal nut body is provided with a circular hole or a tapered hole, and the tapered hole or the circular hole is punched on the side surface of the hexagonal nut, so that after the nut is tightened, tension is locally generated to break the thread pair relationship, thereby achieving the purpose of preventing loosening. The thread pair in the anti-loosening mode can be used only once, is difficult to disassemble, and damages the thread pair.
The same thread section of the bolt with the Down's threads is provided with threads with left and right turning directions, the threads can be matched with left-handed threads and right-handed threads, and the thread directions of the fastening nut and the locking nut are opposite. The fastening nut is not loosened on the assumption that the locking nut is not loosened. However, in practical situations, the locknut is loosened under certain conditions, and the fastening nut is also loosened; in addition, the tang thread structure breaks the continuity of the bolt threads, sacrificing fastening strength.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a self-locking nut machinery anti loosening structure is provided to mechanical locking is inefficacy easily among the solution prior art or need destroy the vice or fastening strength subalternation problem of screw thread.
In order to solve the technical problem, the utility model provides a technical scheme does:
the utility model relates to a self-locking nut mechanical anti-loosening structure, which comprises a bolt and a nut component, wherein one end of the bolt is provided with a first external thread section and a second external thread section, the second external thread section is positioned at the outer side of the first external thread section, the outer diameter of the first external thread section is not less than that of the second external thread section, and the thread rotating directions of the first external thread section and the second external thread section are opposite; the nut component comprises a fastening nut, a locking piece and a locking nut, the thread directions of the fastening nut and the locking nut are opposite, the fastening nut is in threaded connection with the first external thread section, the locking nut is in threaded connection with the second external thread section, the locking piece is arranged between the fastening nut and the locking nut, and the fastening nut and the locking nut are fixed with the locking piece.
Preferably, the locking plate comprises a locking plate body, a first flanging and a second flanging are respectively arranged at two ends of the locking plate body, the fastening nut and the locking nut are respectively tightly attached to the upper surface and the lower surface of the locking plate body, the first flanging is clamped with the side face of the fastening nut, and the second flanging is clamped with the side face of the locking nut.
Preferably, the locking plate comprises a locking plate body, a third flanging is arranged at one end of the locking plate body, the fastening nut and the locking nut are tightly attached to the upper surface and the lower surface of the locking plate body respectively, the third flanging is clamped with the side face of the fastening nut, and the locking nut is welded with the locking plate body.
Preferably, the first external thread section has an outer diameter greater than an outer diameter of the second external thread section.
Preferably, the outer diameter of the first external thread section is the same as that of the second external thread section, and the second external thread section is a left-right double thread.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
the utility model discloses a nut component includes fastening nut, locking plate and lock nut, and lock nut screw thread direction is opposite with fastening nut screw thread direction, and is connected with the locking piece between lock nut and the fastening nut, and the locking piece makes fastening nut and lock nut can not relative motion, reaches the locking target of fastening nut, and this structure mechanical locking is difficult for becoming invalid, and locking effect is good, also can not destroy the screw pair.
Drawings
FIG. 1 is a schematic view of a mechanical anti-loosening structure of a self-locking nut according to an embodiment;
FIG. 2 is a schematic view of a bolt according to the first and second embodiments;
FIG. 3 is a schematic view of a mechanical anti-loosening structure of the self-locking nut according to the second embodiment;
fig. 4 is a schematic view of a bolt according to a third embodiment.
Description of the labeling: 1-bolt, 11-first external thread section, 12-second external thread section, 13-shoulder, 2-fastening nut, 3-locking nut, 4-locking piece, 41-locking piece body, 42-first flanging, 43-second flanging, 44-third flanging and 5-valve disc.
Detailed Description
For further understanding of the present invention, the present invention will be described in detail with reference to the following examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.
Example one
The valve disc and the bolt hookup's of valve mode is used as the example to this embodiment, is right the utility model relates to a from locking nut machinery anti loosening structure further explains.
Referring to fig. 1 and 2, the self-locking nut mechanical anti-loose structure according to the present embodiment is used for locking a valve disc 5, and the structure includes a bolt 1 and a nut assembly, where the bolt 1 is a valve shaft, a shoulder 13 is provided on the bolt 1, and the valve disc 5 is fixed on the shoulder 13 by the nut assembly. One end of the bolt 1 is provided with a first external thread section 11 and a second external thread section 12, the second external thread section 12 is located on the outer side of the first external thread section 11, the thread rotating directions of the first external thread section 11 and the second external thread section 12 are opposite (the first external thread section 11 is right-handed, the second external thread section 12 is left-handed), and in the embodiment, the outer diameter of the first external thread section 11 is larger than the outer diameter of the second external thread section 12 (the outer diameter of the first external thread section 11 is 36mm, and the outer diameter of the second external thread section 12 is 30 mm).
The nut component include fastening nut 2, locking plate 4 and lock nut 3, fastening nut 2 and lock nut 3's screw thread opposite direction, fastening nut 2 threaded connection is in first external screw thread section 11, lock nut 3 threaded connection is in second external screw thread section 12, locking plate 4 sets up between fastening nut 2 and lock nut 3, locking plate 4 includes locking plate body 41, the both ends of locking plate body 41 are equipped with first turn-ups 42 and second turn-ups 43 respectively, fastening nut 2 and lock nut 3 hug closely the upper and lower surface of locking plate body 41 respectively, first turn-ups 42 and fastening nut 2's side joint, second turn-ups 43 and lock nut 3's side joint, and then make fastening nut 2 and lock nut 3 all fixed with the locking plate.
The anti-loosening principle of the mechanical anti-loosening structure of the self-locking nut is as follows: the thread direction of the locking nut 3 is opposite to that of the fastening nut 2, a locking piece 4 is connected between the locking nut 3 and the fastening nut 2, and the locking piece 4 prevents the fastening nut 2 and the locking nut 3 from moving relatively to each other, so that the aim of preventing the fastening nut 2 from loosening is fulfilled.
Example two
Referring to fig. 2 and 3, the self-locking nut mechanical anti-loose structure according to the present embodiment is used for locking the valve disc 5, and the structure includes a bolt 1 and a nut assembly, the bolt 1 is a valve shaft, a shoulder 13 is provided on the bolt 1, and the valve disc 5 is fixed on the shoulder 13 by the nut assembly. One end of the bolt 1 is provided with a first external thread section 11 and a second external thread section 12, the second external thread section 12 is located on the outer side of the first external thread section 11, the thread rotating directions of the first external thread section 11 and the second external thread section 12 are opposite (the first external thread section 11 is right-handed, the second external thread section 12 is left-handed), and in the embodiment, the outer diameter of the first external thread section 11 is larger than the outer diameter of the second external thread section 12 (the outer diameter of the first external thread section 11 is 36mm, and the outer diameter of the second external thread section 12 is 30 mm).
The nut component include fastening nut 2, locking plate 4 and lock nut 3, fastening nut 2 and lock nut 3's screw thread opposite direction, fastening nut 2 threaded connection is in first external screw thread section 11, 3 threaded connection of lock nut is in second external screw thread section 12, locking plate 4 sets up between fastening nut 2 and lock nut 3, locking plate 4 includes locking plate body 41, the one end of locking plate body 41 is equipped with third turn-ups 44, fastening nut 2 and lock nut 3 hug closely the upper and lower surface of locking plate body 41 respectively, third turn-ups 44 and fastening nut 2's side joint, lock nut 3 welds with locking plate body 41, and then make fastening nut 2 and lock nut 3 all fixed with the locking plate.
EXAMPLE III
The present embodiment also uses the way of coupling the valve disc of the valve with the bolt as an example to further explain the mechanical anti-loosening structure of the self-locking nut of the present invention.
Referring to fig. 4, the present embodiment is different from the first embodiment or the second embodiment in that: one end of the bolt 1 is provided with a first external thread section 11 and a second external thread section 12, the thread rotating directions of the first external thread section 11 and the second external thread section 12 are opposite, and the outer diameter of the first external thread section 11 is the same as that of the second external thread section 12 in the embodiment (the outer diameters of the first external thread section 11 and the second external thread section 12 are both 36mm), wherein the second external thread section 12 is a left-right double thread, which ensures that the fastening nut can be assembled on the first external thread section 11 through the second external thread section 12.
It should be appreciated that the first external thread section 11 of the present embodiment is a right-hand thread and the second external thread section 12 is a left-hand and right-hand double thread (i.e., including both left-hand and right-hand threads), and thus falls within the specific form of "opposite direction of the threads of the fastening nut and the locking nut".
The nut assembly in this embodiment is connected to the bolt 1 in the form of the first embodiment or the second embodiment for fixing the valve disc 5, and the connection mode of the nut assembly is not illustrated.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (5)
1. The utility model provides a structure is prevented loosing by auto-lock nut machinery which characterized in that: the bolt comprises a bolt and a nut assembly, wherein one end of the bolt is provided with a first external thread section and a second external thread section, the second external thread section is positioned on the outer side of the first external thread section, the outer diameter of the first external thread section is not smaller than that of the second external thread section, and the rotation directions of the threads of the first external thread section and the second external thread section are opposite; the nut component comprises a fastening nut, a locking piece and a locking nut, the thread directions of the fastening nut and the locking nut are opposite, the fastening nut is in threaded connection with the first external thread section, the locking nut is in threaded connection with the second external thread section, the locking piece is arranged between the fastening nut and the locking nut, and the fastening nut and the locking nut are fixed with the locking piece.
2. The self-locking nut mechanical anti-loosening structure of claim 1, further comprising: the locking plate comprises a locking plate body, a first flanging and a second flanging are respectively arranged at two ends of the locking plate body, a fastening nut and a locking nut are respectively tightly attached to the upper surface and the lower surface of the locking plate body, the first flanging is clamped with the side face of the fastening nut, and the second flanging is clamped with the side face of the locking nut.
3. The self-locking nut mechanical anti-loosening structure of claim 1, further comprising: the locking plate comprises a locking plate body, a third flanging is arranged at one end of the locking plate body, a fastening nut and a locking nut are tightly attached to the upper surface and the lower surface of the locking plate body respectively, the third flanging is clamped with the side face of the fastening nut, and the locking nut is welded with the locking plate body.
4. A mechanical anti-loosening structure for a self-locking nut as claimed in any one of claims 1 to 3, further comprising: the outer diameter of the first external thread section is larger than that of the second external thread section.
5. A mechanical anti-loosening structure for a self-locking nut as claimed in any one of claims 1 to 3, further comprising: the outer diameter of the first external thread section is the same as that of the second external thread section, and the second external thread section is a left-right-handed double thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022531166.XU CN213575097U (en) | 2020-11-05 | 2020-11-05 | Self-locking nut mechanical anti-loosening structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022531166.XU CN213575097U (en) | 2020-11-05 | 2020-11-05 | Self-locking nut mechanical anti-loosening structure |
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| Publication Number | Publication Date |
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| CN213575097U true CN213575097U (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022531166.XU Active CN213575097U (en) | 2020-11-05 | 2020-11-05 | Self-locking nut mechanical anti-loosening structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859311A (en) * | 2021-09-27 | 2021-12-31 | 资阳晨工机车修理有限公司 | DF12 type locomotive anti-delay system and method |
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2020
- 2020-11-05 CN CN202022531166.XU patent/CN213575097U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859311A (en) * | 2021-09-27 | 2021-12-31 | 资阳晨工机车修理有限公司 | DF12 type locomotive anti-delay system and method |
| CN113859311B (en) * | 2021-09-27 | 2023-06-02 | 资阳晨工机车修理有限公司 | DF12 locomotive anti-delay system and method |
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