CN108953356B - Anti-removal nut and joint assembly - Google Patents
Anti-removal nut and joint assembly Download PDFInfo
- Publication number
- CN108953356B CN108953356B CN201710352031.7A CN201710352031A CN108953356B CN 108953356 B CN108953356 B CN 108953356B CN 201710352031 A CN201710352031 A CN 201710352031A CN 108953356 B CN108953356 B CN 108953356B
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- nut
- main
- auxiliary
- sleeve
- main nut
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- 230000033001 locomotion Effects 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 230000002337 anti-port Effects 0.000 claims 1
- 238000005253 cladding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention provides a tamper nut and fitting assembly. This prevent tearing open nut includes main nut (1), auxiliary nut (2) and sleeve (3), auxiliary nut (2) lock with main nut (1) when rotating along the tightening direction of main nut (1), separate with main nut (1) during reverse rotation, sleeve (3) cover is established outside main nut (1), and with auxiliary nut (2) fixed connection, it is spacing in order to prevent that auxiliary nut (2) from deviating from main nut (1) to form the axial between sleeve (3) and main nut (1), axial relative motion distance between sleeve (3) and main nut (1) is greater than auxiliary nut (2) relative main nut (1) from locking to the axial motion distance of separation. According to the anti-dismantling nut, the problems that in the prior art, a common fastener is easy to dismantle through a tool, so that the protection performance is poor and the common fastener is easy to steal are solved.
Description
Technical Field
The invention relates to the technical field of mechanical connection fastening devices, in particular to an anti-disassembly nut and a joint assembly.
Background
With the development of national modernization construction, outdoor open-air engineering equipment and various facilities are increasing, for example: highway guardrail, power transmission equipment, field irrigation equipment etc. these equipment and facility can not be nurse day and night on the one hand, and on the other hand, its mechanical connection is fixed and mostly adopts ordinary fastener again, can conveniently dismantle fast with ordinary instrument like spanner, breakout tongs, and the protectiveness is poor, consequently, stolen phenomenon takes place occasionally, and some still cause serious economic loss and social influence.
Disclosure of Invention
The invention aims to provide a disassembly-preventing nut and joint assembly to solve the problems that in the prior art, a common fastener is easy to disassemble through a tool, so that the common fastener is poor in protection performance and easy to steal.
In order to solve the technical problem, as an aspect of the present invention, a tamper nut is provided, including a main nut, an auxiliary nut, and a sleeve, a one-way ratchet structure is formed between the main nut and the auxiliary nut, the auxiliary nut is locked with the main nut when rotating along a tightening direction of the main nut, the auxiliary nut is separated from the main nut when rotating along a tightening direction of the main nut in a reverse direction, the sleeve is sleeved outside the main nut and is fixedly connected with the auxiliary nut, an axial limit is formed between the sleeve and the main nut to prevent the auxiliary nut from coming off the main nut, and an axial relative movement distance between the sleeve and the main nut is greater than an axial movement distance between the auxiliary nut and the main nut from locking to separation relative to the main nut.
According to the anti-dismantling nut, when the nut is installed, the auxiliary nut can be driven to rotate along the screwing direction of the main nut, when the auxiliary nut and the main nut are in axial contact, a one-way ratchet wheel structure is formed between the auxiliary nut and the main nut, the main nut is driven to rotate together by the rotation of the auxiliary nut, the main nut is enabled to rotate towards the screwing direction, and therefore the main nut is screwed. After main nut screwed up and targetting in place, if exert the counter rotation effort to auxiliary nut this moment, auxiliary nut can be along the reverse rotation of the tightening direction of main nut, and with the separation of main nut, break away from the locking position, even consequently, auxiliary nut rotates towards the direction of loosening, because auxiliary nut can't drive main nut and together rotate, consequently, can't operate main nut and rotate towards the direction of loosening through control auxiliary nut, because the main nut overcoat is equipped with the sleeve, fixed connection between sleeve and the auxiliary nut, whole cladding is in the main nut outside, can prevent that other people from operating main nut with the help of the direct and main nut contact of instrument, thereby effectively prevent that main nut from being dismantled, improve the anti-tear performance of preventing tearing open the nut.
Drawings
Fig. 1 is a schematic view showing a half-section structure of a tamper nut according to a first embodiment of the present invention in a locked state of a main nut and an auxiliary nut;
fig. 2 is a schematic view showing a half-section structure of a tamper nut according to a first embodiment of the present invention in a state where a main nut and an auxiliary nut are separated;
fig. 3 schematically shows a perspective view of a main nut of the tamper nut according to the first embodiment of the present invention;
fig. 4 is a perspective view schematically showing an auxiliary nut of the tamper nut according to the first embodiment of the present invention;
FIG. 5 is a schematic view showing a half-section structure of a sleeve of a tamper nut according to a first embodiment of the present invention;
fig. 6 schematically shows a perspective view of a tamper nut according to a first embodiment of the present invention;
FIG. 7 is a schematic view showing a half-section structure of a tamper nut according to a second embodiment of the present invention in a locked state of a main nut and an auxiliary nut;
FIG. 8 is a schematic view showing a half-section structure of a removal prevention nut in a state where a main nut and an auxiliary nut are separated according to a second embodiment of the present invention;
fig. 9 schematically shows a half-sectional view of a sleeve of a tamper nut according to a second embodiment of the present invention.
Reference numbers in the figures: 1. a main nut; 2. an auxiliary nut; 3. a sleeve; 4. a first wedge tooth; 5. a second wedge tooth; 6. sleeving a pipe; 7. a first stop boss; 8. a second stop boss; 9. a baffle ring; 10. and (4) bolts.
Detailed Description
The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.
Referring to fig. 1 to 6, according to a first embodiment of the present invention, the anti-tamper nut includes a main nut 1, an auxiliary nut 2 and a sleeve 3, a one-way ratchet structure is formed between the main nut 1 and the auxiliary nut 2, the auxiliary nut 2 is locked with the main nut 1 when rotating along a tightening direction of the main nut 1, the auxiliary nut 2 is separated from the main nut 1 when rotating along a tightening direction of the main nut 1 in a reverse direction, the sleeve 3 is sleeved outside the main nut 1 and fixedly connected to the auxiliary nut 2, an axial limit is formed between the sleeve 3 and the main nut 1 to prevent the auxiliary nut 2 from being removed from the main nut 1, and an axial relative movement distance between the sleeve 3 and the main nut 1 is greater than an axial movement distance between the auxiliary nut 2 and the main nut 1 from locking to separation.
According to the anti-disassembly nut, when the nut is installed, the auxiliary nut 2 can be driven to rotate along the screwing direction of the main nut 1, when the auxiliary nut 2 is in axial contact with the main nut 1, a one-way ratchet structure is formed between the auxiliary nut 2 and the main nut 1, the main nut 1 is driven to rotate together by the rotation of the auxiliary nut 2, the main nut 1 is enabled to rotate towards the screwing direction, and therefore the main nut 1 is screwed. After main nut 1 is screwed up and targets in place, if exert the counter rotation effort to auxiliary nut 2 this moment, auxiliary nut 2 can be along the reverse rotation of the tightening direction of main nut 1, and with main nut 1 separation, break away from the locking position, therefore even auxiliary nut 2 rotates towards the direction of loosening, because auxiliary nut 2 can't drive main nut 1 and rotate together, consequently can't rotate towards the direction of loosening through the main nut 1 of control auxiliary nut 2 operation, because 1 overcoat of main nut is equipped with sleeve 3, fixed connection between sleeve 3 and the auxiliary nut 2, whole cladding is in the main nut 1 outside, can prevent that other people from directly operating main nut 1 with the help of the direct and main nut 1 contact of instrument, thereby effectively prevent that main nut 1 from being dismantled, improve the anti-dismounting performance of preventing the nut of tearing open. Because sleeve 3 and auxiliary nut 2 fixed connection to the axial motion to auxiliary nut 2 on main nut 1 fixes a position, can prevent effectively that auxiliary nut 2 from deviating from main nut 1, improve auxiliary nut 2 and main nut 1 cooperation structure's stability and reliability.
Preferably, one end of the main nut 1 facing the auxiliary nut 2 is provided with a wedge-shaped groove, one end of the auxiliary nut 2 facing the main nut 1 is provided with a second wedge-shaped tooth 5 matched with the wedge-shaped groove, and the wedge-shaped groove and the second wedge-shaped tooth 5 form a one-way ratchet structure. When the auxiliary nut 2 rotates along the direction of screwing the main nut 1, the second wedge-shaped teeth 5 are gradually screwed into the wedge-shaped groove from shallow to deep and embedded into the wedge-shaped groove, when the second wedge-shaped teeth 5 are screwed in place, the tooth ends of the second wedge-shaped teeth 5 are in contact with the tail end baffle of the wedge-shaped groove, and the main nut 1 is driven to rotate together through the tail end baffle in the rotating process, so that the main nut 1 rotates towards the screwing direction, and the locking of the main nut 1 is completed. After main nut 1 rotated to the position, can the counter rotation auxiliary nut 2, 5 counter rotations of second wedge tooth of auxiliary nut 2 this moment, second wedge tooth 5 can be followed the inclined plane direction in wedge groove and screwed out the wedge groove by the depth to shallowly to with the separation of wedge groove, even rotate auxiliary nut 2 this moment, second wedge tooth 5 also can't drive main nut 1 rotatory, consequently can prevent that main nut 1 from being dismantled, improve the anti-tear performance of preventing tearing the nut open.
Preferably, the one-way ratchet between the main nut 1 and the auxiliary nut 2 can also be a structure, wherein one end of the main nut 1 facing the auxiliary nut 2 is provided with a first wedge-shaped tooth 4, one end of the auxiliary nut 2 facing the main nut 1 is provided with a second wedge-shaped tooth 5 matched with the first wedge-shaped tooth 4, and the first wedge-shaped tooth 4 and the second wedge-shaped tooth 5 form a one-way ratchet structure. In the present embodiment, the plurality of first wedge teeth 4 are uniformly distributed along the circumferential direction of the end surface of the main nut 1, and the second wedge teeth 5 are circumferentially distributed on the end surface of the auxiliary nut 2 in one-to-one correspondence with the first wedge teeth 4. Wherein the tooth-shaped structure of the first wedge-shaped teeth 4 is complementary to the tooth-shaped structure of the second wedge-shaped teeth 5, in particular, the thickness of the first wedge-shaped teeth 4 increases progressively and the thickness of the second wedge-shaped teeth 5 decreases progressively in the clockwise direction of the main nut 1. This kind of structure is direct to cooperate through the first wedge tooth 4 of main nut 1 and the second wedge tooth 5 of auxiliary nut 2, need not to set up the periphery, consequently can simplify processing structure, reduces the processing degree of difficulty and processing cost.
Preferably, interference fit or welding is performed between the sleeve 3 and the auxiliary nut 2, so that a stable and reliable connection structure can be formed between the sleeve 3 and the auxiliary nut 2.
Preferably, the sleeve 3 is sleeved on the periphery of the second wedge-shaped tooth 5 of the auxiliary nut 2, so that the matching structure of the auxiliary nut 2 can be simplified, the matching structure of the sleeve 3 does not need to be separately processed on the auxiliary nut 2, the processing technology is reduced, the processing difficulty is reduced, and the processing efficiency of the auxiliary nut 2 is improved. Of course, the boss structure may be disposed on the outer periphery of the auxiliary nut 2, and then the sleeve 3 is sleeved on the boss structure, so that the sleeve 3 and the boss structure may be in interference fit or may be welded and fixed. The sleeve 3 and the auxiliary nut 2 may be fitted together by caulking or the like and then welded and fixed.
Preferably, the main nut 1 comprises a socket 6 axially projecting towards the auxiliary nut 2, the auxiliary nut 2 being slidingly sleeved on the socket 6. The sleeve 6 can form radial positioning for the arrangement of the auxiliary nut 2, prevent the auxiliary nut 2 from generating radial deviation in the using process, ensure the accuracy of the movement direction of the auxiliary nut 2 and improve the reliability of the matching structure of the auxiliary nut 2 and the main nut 1.
Preferably, the inner peripheral wall of the sleeve 3 is provided with a first stopping boss 7, the outer peripheral wall of the main nut 1 is provided with a second stopping boss 8, and the second stopping boss 8 is located between the first stopping boss 7 and the auxiliary nut 2 and forms a stop for the axial movement of the first stopping boss 7. An axial stopping structure can be formed between the first stopping boss 7 and the second stopping boss 8, when the auxiliary nut 2 rotates reversely, the auxiliary nut 2 moves towards the direction far away from the main nut 1, when the auxiliary nut 2 moves for a certain distance, the second wedge-shaped teeth 5 are completely separated from the first wedge-shaped teeth 4, at this time, if the auxiliary nut 2 continues to move towards the direction far away from the main nut 1, the first stopping boss 7 moves towards the direction close to the second stopping boss 8, when the first stopping boss 7 moves to the position of the second stopping boss 8, the sleeve 3 can not move together with the auxiliary nut 2, under the connecting action of the sleeve 3, the auxiliary nut 2 can not move towards the direction far away from the main nut 1, so that the auxiliary nut 2 can not be separated from the main nut 1, the main nut 1 is prevented from being exposed, and the main nut 1 is prevented from being directly disassembled, the anti-removal performance of the main nut 1 is improved.
Preferably, the axial relative movement distance between the sleeve 3 and the main nut 1 is within 5mm greater than the axial movement distance of the auxiliary nut 2 from locking to separation with respect to the main nut 1. The first backstop boss 7 of the inside of sleeve and the second backstop boss 8 of main nut 1 excircle match, guarantee that auxiliary nut 2 can not drop, sleeve 3 and auxiliary nut 2 are fixed for main nut 1 along the axial mobilizable distance more than or equal to the axial distance that the wedge tooth required breaks away from each other to guarantee that the wedge tooth breaks away from. The axial relative movement distance between the sleeve 3 and the main nut 1 is greater than the length of the auxiliary nut 2 relative to the main nut 1 from locking to separating, the length of the auxiliary nut from locking is within 5mm, the exposed length of the main nut 1 can be prevented from enabling the pipe wrench to have a clamping width, and the problem that the pipe wrench directly operates the main nut 1 to cause the disassembly-preventing nut to be disassembled is avoided.
Referring to fig. 7 to 9 in combination, the tamper bolt according to the second embodiment of the present invention has substantially the same structure as that of the first embodiment, except that in this embodiment, the end of the sleeve 3 away from the end of the auxiliary nut 2 is provided with a stop ring 9, and the stop ring 9 axially stops at the end of the main nut 1 away from the auxiliary nut 2. This sleeve 3 forms axial backstop through setting up the fender ring 9 at the tip with main nut 1, consequently need not to set up the backstop boss, can directly form spacingly through the axial motion of fender ring 9 to auxiliary nut 2, prevents that auxiliary nut 2 from deviating from main nut 1.
According to an embodiment of the present invention, the joint assembly includes a bolt 10 and a tamper nut screwed on the bolt 10, the tamper nut being the above-described tamper nut.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a prevent nut of tearing open, its characterized in that, including main nut (1), auxiliary nut (2) and sleeve (3), main nut (1) with form one-way ratchet structure between auxiliary nut (2), auxiliary nut (2) along when screwing up the direction of main nut (1) rotates with main nut (1) locking, auxiliary nut (2) along when screwing up the direction antiport of main nut (1) with main nut (1) separation, sleeve (3) cover is established outside main nut (1), and with auxiliary nut (2) fixed connection, sleeve (3) with form axial spacing between main nut (1) so as to prevent auxiliary nut (2) follow deviate from on main nut (1), sleeve (3) with axial relative motion distance between main nut (1) is greater than auxiliary nut (2) is relative main nut (1) is from locking to the axial relative motion distance of separation And (4) moving distance.
2. The tamper nut as claimed in claim 1, characterized in that the end of the main nut (1) facing the auxiliary nut (2) is provided with a wedge-shaped groove, and the end of the auxiliary nut (2) facing the main nut (1) is provided with a second wedge-shaped tooth (5) cooperating with the wedge-shaped groove, the wedge-shaped groove and the second wedge-shaped tooth (5) forming the one-way ratchet structure.
3. The tamper nut according to claim 1, characterized in that the end of the main nut (1) facing the auxiliary nut (2) is provided with first wedge teeth (4), the end of the auxiliary nut (2) facing the main nut (1) is provided with second wedge teeth (5) cooperating with the first wedge teeth (4), the first wedge teeth (4) and the second wedge teeth (5) forming the one-way ratchet structure.
4. The tamper nut as claimed in any one of claims 1 to 3, characterized in that the sleeve (3) and the auxiliary nut (2) are in an interference fit or welded.
5. The tamper nut as claimed in any one of claims 1 to 3, characterized in that the main nut (1) comprises a socket (6) projecting axially towards the auxiliary nut (2), the auxiliary nut (2) being slidingly fitted on the socket (6).
6. The tamper nut as claimed in any one of claims 1 to 3, characterized in that a first stop boss (7) is provided on an inner circumferential wall of the sleeve (3), a second stop boss (8) is provided on an outer circumferential wall of the main nut (1), the second stop boss (8) being located between the first stop boss (7) and the auxiliary nut (2) and forming a stop for axial movement of the first stop boss (7).
7. The tamper nut as claimed in any one of claims 1 to 3, characterized in that the end of the sleeve (3) remote from the end of the auxiliary nut (2) is provided with a stop ring (9), the stop ring (9) axially stopping at the end of the main nut (1) remote from the auxiliary nut (2).
8. Tamper nut according to any one of claims 1 to 3, characterized in that the axial relative movement distance between the sleeve (3) and the main nut (1) is within 5mm greater than the axial movement distance of the auxiliary nut (2) from locking to separation relative to the main nut (1).
9. A joint assembly comprising a bolt (10) and a tamper nut threaded on the bolt (10), characterised in that the tamper nut is as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710352031.7A CN108953356B (en) | 2017-05-18 | 2017-05-18 | Anti-removal nut and joint assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710352031.7A CN108953356B (en) | 2017-05-18 | 2017-05-18 | Anti-removal nut and joint assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108953356A CN108953356A (en) | 2018-12-07 |
| CN108953356B true CN108953356B (en) | 2021-07-20 |
Family
ID=64462796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710352031.7A Active CN108953356B (en) | 2017-05-18 | 2017-05-18 | Anti-removal nut and joint assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108953356B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020129212A1 (en) | 2018-12-20 | 2020-06-25 | 三菱電機株式会社 | Pipe joint structure, and air conditioner |
| JP7413529B2 (en) * | 2019-12-04 | 2024-01-15 | 浙江盾安人工環境股▲ふん▼有限公司 | Anti-separation nut assembly and air conditioning system |
| CN212616854U (en) * | 2020-04-15 | 2021-02-26 | 浙江盾安禾田金属有限公司 | Anti-dismantling joint and anti-dismantling joint assembly |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3302239A1 (en) * | 1983-01-24 | 1984-07-26 | Paul Pleiger Handelsgesellschaft mbH, 5810 Witten | Connecting element |
| US6695557B2 (en) * | 2001-09-05 | 2004-02-24 | John Hove | Wheel lug nut security seal |
| CN203453660U (en) * | 2013-07-31 | 2014-02-26 | 广东美的制冷设备有限公司 | Air conditioner and disassembly preventing pipe connection device |
| CN104976209B (en) * | 2015-07-10 | 2017-08-25 | 上海三菱电机·上菱空调机电器有限公司 | Tamper-resistant union nut, union nut component, the method for air conditioner and union nut Anti-dismantling |
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2017
- 2017-05-18 CN CN201710352031.7A patent/CN108953356B/en active Active
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| Publication number | Publication date |
|---|---|
| CN108953356A (en) | 2018-12-07 |
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