CN210509906U - End face taper centering interlocking locknut external member - Google Patents
End face taper centering interlocking locknut external member Download PDFInfo
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- CN210509906U CN210509906U CN201921638777.5U CN201921638777U CN210509906U CN 210509906 U CN210509906 U CN 210509906U CN 201921638777 U CN201921638777 U CN 201921638777U CN 210509906 U CN210509906 U CN 210509906U
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Abstract
An end face taper centering interlocking locknut kit comprises an upper nut with an axial threaded through hole I and a lower nut with an axial threaded through hole II, wherein one end face of the upper nut is provided with a boss, and the end face of the boss has a taper; a cylindrical groove matched with the boss is concavely formed in one end face of the lower nut, and the contact plane between the bottom of the groove and the end face of the boss is provided with a taper matched with the end face of the boss; under the assembly state, the terminal surface of boss is located the bottom of recess, the center pin of screw through-hole I and II center pin coincidences of screw through-hole, the boss of upper nut is clearance fit with the columniform recess of lower nut. The nut suite adopts the novel end face taper centering interlocking locknut suite which avoids eccentric applying lateral force to the screw rod additionally by end face taper centering, avoids the lateral force of the thread caused by the side surface matching of the eccentric cone, and has better safety and anti-seismic performance than the shockproof nut on the current market.
Description
Technical Field
The utility model relates to a fastener field specifically is end face tapering centering interlocking locknut external member.
Background
The eccentric nut in Japan utilizes the matching of eccentric taper surfaces to achieve the shockproof effect similar to the wedge wedged in the thread. The eccentric nut is widely applied to the high-speed rail industry, is convenient to disassemble and maintain and can be used for multiple times. After the upper nut and the lower nut are locked, the lower nut can transmit the vibration force to the upper nut from the eccentric contact surface in a one-way mode due to the parallel offset eccentric angle, and therefore the phenomenon that the nut is loosened due to the fact that vibration is transmitted uniformly due to the fact that the full contact surface of a common nut is avoided. However, the eccentric taper surface of the eccentric nut is easy to generate additional lateral force applied to the thread during assembly, and the service effect or the service life of the thread is affected. And the eccentric nut is generally stressed in a lateral pressing mode, so that the screw is additionally stressed in a lateral force mode, and the risk of fracture of the screw caused by the lateral force is caused. Therefore, from the safety point of view, the nut is not loosened but the screw rod is broken, and great potential safety hazard also exists.
Disclosure of Invention
The utility model provides an adopt the centering of terminal surface tapering to avoid off-centre to additionally exert the novel terminal surface tapering centering interlocking locknut external member of yawing force for the screw rod, avoided eccentric awl side cooperation to lead to screw thread side direction atress, its security and anti-seismic performance all are superior to the nut that takes precautions against earthquakes on the current market.
The utility model adopts the technical proposal that: an end face taper centering interlocking locknut kit comprises an upper nut with an axial threaded through hole I and a lower nut with an axial threaded through hole II, wherein the aperture of the threaded through hole I is the same as that of the threaded through hole II; one end face of the upper nut is provided with a boss, and the end face of the boss has taper; a cylindrical groove matched with the boss is concavely formed in one end face of the lower nut, the central axis of the cylindrical groove is overlapped with the central axis of the threaded through hole II, and the contact plane between the bottom of the groove and the end face of the boss is made into a taper matched with the end face of the boss; under the assembly state, the terminal surface of boss is located the bottom of recess, the center pin of screw through-hole I and II center pin coincidences of screw through-hole, the boss of upper nut is clearance fit with the columniform recess of lower nut.
The further technical scheme is as follows: the profile design requirements of the boss are as follows: the bottom of the groove of the lower nut is suspended in the air at the contact plane of the lug boss end surface of the upper nut.
The further technical scheme is as follows: the profile of the boss is one or any one of eccentric circle, ellipse, diamond, perfect circle, ring and triangle.
The further technical scheme is as follows: the profile of the boss is eccentric round with the axial thread through hole I.
The further technical scheme is as follows: the profile of boss is the concentric regular circle with axial screw thread through-hole I, just the up end of boss is provided with a unfilled corner.
Since the technical scheme is used, the utility model discloses an end face tapering centering interlocking locknut external member has following beneficial effect:
the theory of operation of current eccentric nut of contrast, the utility model discloses an upper and lower nut both sides face is clearance fit, and there is not the contact of side, just does not produce extra yawing force yet and applys for screw thread work part, absolutely can not influence the fatigue strength and the meshing force of screw thread because of the side direction atress, and operating conditions is superior to Japan eccentric nut greatly. The eccentric boss of the Japanese eccentric nut still does not influence assembly when the machining out-of-tolerance is less, but the radial force brought to the thread by the out-of-tolerance part can influence the service life and the effect, and even if the size is not out-of-tolerance at all, the interference extrusion can still generate extra lateral force to be applied to the thread. And the utility model discloses a boss of upper nut and the columniform recess both sides face of lower nut are cylindrical clearance fit (usable eccentric or unfilled corner reach required unilateral holding down force), can't assemble at all when the size is out of tolerance, have stopped from the root to bring extra side direction atress for the screw thread because of the error.
Furthermore, the utility model discloses in, when the profile was laminated about the nut, the stress surface acted on the terminal surface. The discovery of contrast japan eccentric nut, the utility model discloses an its effort of terminal surface tapering is not a centripetal force, but takes place the skew off-centre after in order to prevent the upper and lower nut interlock, and its main function is centering, guarantees the axiality after the upper and lower nut closes soon as far as possible. Therefore, the eccentric design (can also be designed into any shape: eccentric circle, rhombus, concentric circle, ring, ellipse, triangle and the like) of the utility model mainly uses the suspended part to generate downward reverse pressure to bite the thread surface of the part when the nut under the groove is locked, the pressure is higher, the locking force is stronger, the anti-loosening performance is more excellent, and the locking force is the upper and lower locking force parallel to the axis. The eccentric locking principle of the japanese eccentric nut is to generate centripetal force to lock with the protruded profile, and the force generated by locking is centripetal, not the up-down locking force of the present invention. The utility model utilizes the molded surfaces of the upper and lower nuts to generate the upper and lower interlocking force coaxial with the screw rod to seize the thread surface of the screw rod, all stress points only act on the thread engaging surface on one side, and any centripetal force is not generated to influence the strength of the screw rod; because of the power that has the interlocking again of nut from top to bottom, consequently, the utility model discloses a nut can arbitrary moment locking part on the boss, and the nut from top to bottom produces the interlocking when twisting recess lower nut and locking, and the lower nut does not follow the nut and rotates, and after twisting required moment of torsion, the axial force that the part bore can not reach the limit that the screw rod bore, can protect the screw rod and can play good locking effect again. Therefore, the end face taper centering interlocking locknut suite has better safety performance than a centripetal force locking mode of a Japanese eccentric nut and is safer than a locknut which is locked by large torque on the market.
In conclusion, the eccentric contact stress surface of the nut sleeve is only the end surface, and the screw is not additionally subjected to lateral force by lateral pressure stress as in the case of the Japanese eccentric nut, so that the fracture risk of the screw caused by the lateral force is avoided to the maximum extent, and the safety and the shockproof effect are better than those of the Japanese eccentric nut. And this nut external member simple to operate is reliable, dismantles simply.
The technical features of the end face taper centering interlocking locknut set of the present invention will be further explained with reference to the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic view of an upper nut structure according to a first embodiment;
FIG. 2 is a cross-sectional view of an upper nut according to one embodiment;
FIG. 3 is a perspective view of an upper nut of the first embodiment;
FIG. 4 is a schematic view of a lower nut structure according to the first embodiment;
FIG. 5 is a cross-sectional view of a lower nut of the first embodiment;
FIG. 6 is a bottom perspective view of the nut of the first embodiment;
FIG. 7 is a schematic view of the assembly of the upper nut and the lower nut of the first embodiment;
fig. 8 is a view showing a state of the end face taper centering interlocking locknut assembly according to the first embodiment of the present invention.
FIG. 9 is a schematic view of the upper nut structure of the second embodiment;
FIG. 10 is a cross-sectional view of the upper nut of the second embodiment;
FIG. 11 is a perspective view of the upper nut of the second embodiment;
FIG. 12 is a schematic view of the lower nut structure of the second embodiment;
FIG. 13 is a cross-sectional view of the lower nut of the second embodiment;
FIG. 14 is a bottom perspective view of the nut of the second embodiment;
FIG. 15 is a schematic view of the assembly of the upper nut and the lower nut of the second embodiment;
fig. 16 is a view showing the using state of the end face taper centering interlocking locknut assembly according to the second embodiment of the present invention.
In the figure:
1-upper nut I, 11-round boss I, 12-thread through hole Ia;
2-lower nut I, 21-cylindrical groove I, 22-threaded through hole IIa;
3-mounting a nut II, 31-a circular boss II, 32-a thread through hole Ib, 33-a unfilled corner;
4-lower nut II, 41-cylindrical groove II, 42-threaded through hole IIb;
5-screw.
Detailed Description
An end face taper centering interlocking locknut kit comprises an upper nut with an axial threaded through hole I and a lower nut with an axial threaded through hole II, wherein the aperture of the threaded through hole I is the same as that of the threaded through hole II; one end face of the upper nut is provided with a boss, and the end face of the boss has taper; a cylindrical groove matched with the boss is concavely formed in one end face of the lower nut, the central axis of the cylindrical groove is overlapped with the central axis of the threaded through hole II, and the contact plane between the bottom of the groove and the end face of the boss is made into a taper matched with the end face of the boss; under the assembly state, the terminal surface of boss is located the bottom of recess, the center pin of screw through-hole I and II center pin coincidences of screw through-hole, the boss of upper nut is clearance fit with the columniform recess of lower nut.
The profile design requirements of the boss are as follows: the bottom of the groove of the lower nut is suspended in the air at the contact plane of the lug boss end surface of the upper nut.
The utility model discloses a specific boss profile (can be not limited to arbitrary shapes such as eccentric circular, oval, rhombus, perfect circle, annular, triangle-shaped) makes the upper and lower nut produce the interlocking force that the unilateral pushed down to centering through the tapering terminal surface, just can die the unable rotation of screw thread face lock of screw rod and withdraw and be the utility model discloses a patent protection scope. The utility model discloses also having arrived the conclusion through a large amount of actual test, arbitrary profile cooperation as long as can follow the utility model discloses a principle all can obtain good locking performance, can pass through GB/T10431(2008) transverse vibration test completely and detect, and the experiment can last screw rod fatigue fracture still not hard up yet.
The present invention will be further described with reference to the following examples in which the profile of the boss is in the form of two more typical appearances, namely an eccentric circle and a concentric circle, without thereby limiting the scope of the invention to the examples described.
The first embodiment is as follows:
as shown in fig. 1 to 7, the end face taper centering interlocking locknut kit comprises an upper nut I1 with an axial threaded through hole Ia 12 and a lower nut I2 with an axial threaded through hole IIa, wherein the diameter of the threaded through hole Ia 12 is the same as that of the threaded through hole IIa 22.
One end face of the upper nut I1 is provided with a circular boss I11, the profile of the circular boss I11 is an eccentric circle eccentric to the axial threaded through hole Ia 12, as shown in FIG. 1, wherein a represents the central line of the circular boss I11, and b represents the central line of the axial threaded through hole Ia 12; the end face A (see figures 2 and 3) of the circular boss I11 is provided with a taper.
A cylindrical groove I21 matched with the circular boss I11 is formed in the inner side of one end face of the lower nut I2 in a concave mode, the central axis of the cylindrical groove I21 is overlapped with the central axis of the threaded through hole IIa, and the bottom of the cylindrical groove I21 and the contact plane of the end face of the circular boss B (see figure 5) are made into taper matched with the end face of the circular boss I11.
In an assembly state, the end face of the circular boss I11 is located at the bottom of the cylindrical groove I21, the central axis of the threaded through hole Ia 12 coincides with the central axis of the threaded through hole IIa 22, and the circular boss I11 of the upper nut I is in clearance fit with the cylindrical groove I21 of the lower nut I. As can be seen from FIG. 7, the position E shows that the two side surfaces of the cylindrical groove I21 and the circular boss I11 are in clearance fit, and lateral force caused by excessive extrusion is avoided; the cooperation of the tapered end faces (A, B) to ensure that the coaxial shafts do not shift after locking is shown at F; the figure G shows that the eccentric position causes the screw to hang in the air, and the locking force is concentrated at the position so that the upper nut and the lower nut can clamp the thread surface of the screw in a one-way mode; f1 shows the upward pushing force generated after locking, the direction of the pushing force is the direction indicated by the arrow; in the figure f2 shows that the suspension causes a unilateral downward pressure, the direction of which is indicated by the arrow. The end face taper centering interlocking locknut kit of the embodiment is used as shown in fig. 8.
The key point of this embodiment is that the terminal surface tapering centering can let the effort that leads to after the locking of one-way locking force because of the off-centre only apply on the unilateral screw thread, and can not extra apply to produce horizontal centripetal lateral force for the screw rod, furthest has protected the screw rod, furthest has avoided the cracked risk of screw rod.
Example two:
as shown in fig. 9 to 15, the end face taper centering interlocking locknut kit comprises an upper nut ii 3 with an axial threaded through hole lb 32 and a lower nut ii 4 with an axial threaded through hole lb 42, wherein the diameter of the threaded through hole lb 32 is the same as that of the threaded through hole lb 42.
One end face of the upper nut II 3 is provided with a circular boss II 31, the profile of the circular boss II 31 is a perfect circle concentric with the axial threaded through hole Ib 32, and the upper end face of the circular boss II 31 is provided with an unfilled corner 33. As shown in fig. 9, c indicates the center line of the circular boss ii 31 and also indicates the center line of the threaded through hole ii b42, and the center line of the circular boss ii 31 coincides with the center line of the threaded through hole ii b 42; the end surface C (see figures 10 and 11) of the circular boss II 31 is provided with a taper; a cylindrical groove II 41 matched with the circular boss II 31 is concavely formed in one end face of the lower nut II 4, the central axis of the cylindrical groove II is overlapped with the central axis of the threaded through hole IIb 42, and the contact plane D (see figure 13) of the bottom of the cylindrical groove II 41 and the end face of the circular boss is made into a taper matched with the end face of the circular boss II 31.
In an assembled state, the end face of the circular boss II 31 is located at the bottom of the cylindrical groove II 41, the central axis of the threaded through hole Ib 32 is overlapped with the central axis of the threaded through hole IIb 42, and the circular boss II 31 of the upper nut II 3 is in clearance fit with the cylindrical groove II 41 of the lower nut II 4. As can be seen from FIG. 15, H, I shows that the two sides of the cylindrical groove II 41 and the circular boss II 31 are in clearance fit, and lateral force caused by excessive extrusion is avoided; in the figure, J shows that the single-side pressure of the unfilled corner is larger than the unfilled corner direction due to the hanging unfilled corner of the round boss II 31; the taper end face (C, D) is matched to ensure that the coaxial shafts are not deviated after locking; f1 shows the upward pushing force generated after locking, the direction of the pushing force is the direction indicated by the arrow; in the figure f2 shows that the suspension causes a unilateral downward pressure, the direction of which is indicated by the arrow. The use state of the present embodiment is shown in fig. 16.
The key point of this embodiment is that the dead angle tapering centering can let the effort that leads to the locking of one-way locking force because of the unfilled corner only apply on unilateral screw thread, and can not extra apply to produce horizontal centripetal lateral force for the screw rod, furthest has protected the screw rod, furthest has avoided the cracked risk of screw rod.
In the two embodiments, the taper centering of the end face is adopted, so that no lateral force is applied to the screw, and the downward unidirectional locking force generated by the groove nut at the suspended position is utilized to seize the thread profile to play a role in preventing looseness. The screw rod is provided with a locking screw, the locking screw is provided with a locking screw hole, the locking screw hole is provided with a locking screw hole, the locking.
The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize. The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited to the description of the above embodiments, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of ways without departing from the spirit of the present invention, and all of them should be considered as belonging to the scope of the present invention as defined by the appended claims.
Claims (5)
1. The utility model provides an end face tapering centering interlocking locknut external member which characterized in that: the nut comprises an upper nut with an axial threaded through hole I and a lower nut with an axial threaded through hole II, wherein the aperture of the threaded through hole I is the same as that of the threaded through hole II; one end face of the upper nut is provided with a boss, and the end face of the boss has taper; a cylindrical groove matched with the boss is concavely formed in one end face of the lower nut, the central axis of the cylindrical groove is overlapped with the central axis of the threaded through hole II, and the contact plane between the bottom of the groove and the end face of the boss is made into a taper matched with the end face of the boss; under the assembly state, the terminal surface of boss is located the bottom of recess, the center pin of screw through-hole I and II center pin coincidences of screw through-hole, the boss of upper nut is clearance fit with the columniform recess of lower nut.
2. The end face taper centering interlocking locknut assembly of claim 1, wherein: the profile design requirements of the boss are as follows: the bottom of the groove of the lower nut is suspended in the air at the contact plane of the lug boss end surface of the upper nut.
3. The end face taper centering interlocking locknut assembly of claim 2, wherein: the profile of the boss is one or any one of eccentric circle, ellipse, diamond, perfect circle, ring and triangle.
4. The end face taper centering interlocking locknut assembly of claim 3, wherein: the profile of the boss is eccentric round with the axial thread through hole I.
5. The end face taper centering interlocking locknut assembly of claim 3, wherein: the profile of boss is the concentric regular circle with axial screw thread through-hole I, just the up end of boss is provided with a unfilled corner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921638777.5U CN210509906U (en) | 2019-09-27 | 2019-09-27 | End face taper centering interlocking locknut external member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921638777.5U CN210509906U (en) | 2019-09-27 | 2019-09-27 | End face taper centering interlocking locknut external member |
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| CN210509906U true CN210509906U (en) | 2020-05-12 |
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| CN201921638777.5U Active CN210509906U (en) | 2019-09-27 | 2019-09-27 | End face taper centering interlocking locknut external member |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645254A (en) * | 2019-09-27 | 2020-01-03 | 周峰 | End face taper centering interlocking locknut external member |
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2019
- 2019-09-27 CN CN201921638777.5U patent/CN210509906U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645254A (en) * | 2019-09-27 | 2020-01-03 | 周峰 | End face taper centering interlocking locknut external member |
| WO2021057534A1 (en) * | 2019-09-27 | 2021-04-01 | 周峰 | Interlocking locknut kit with end face taper centering |
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Effective date of registration: 20230406 Address after: 056000 Dongbao Village, Guantao Town, Guantao County, Handan City, Hebei Province Patentee after: HEBEI XINDE POWER FITTINGS CO.,LTD. Patentee after: Zhejiang Jianfan Special Fasteners Co.,Ltd. Address before: 545002 Room 302, unit 2, building 11, village 3, Shengli community, Liubei District, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee before: Zhou Feng |