WO2016092572A1 - Unscrewing-preventing systems through friction for bolts - Google Patents
Unscrewing-preventing systems through friction for bolts Download PDFInfo
- Publication number
- WO2016092572A1 WO2016092572A1 PCT/IT2014/000330 IT2014000330W WO2016092572A1 WO 2016092572 A1 WO2016092572 A1 WO 2016092572A1 IT 2014000330 W IT2014000330 W IT 2014000330W WO 2016092572 A1 WO2016092572 A1 WO 2016092572A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nut
- unscrewing
- lock nut
- preventing system
- diameter
- Prior art date
Links
- 230000009467 reduction Effects 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000004809 Teflon Substances 0.000 claims description 2
- 229920006362 Teflon® Polymers 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
- F16B39/16—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts in which the screw-thread of the locknut differs from that of the nut
-
- 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
- F16B33/00—Features common to bolt and nut
- F16B33/004—Sealing; Insulation
-
- 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
- F16B33/00—Features common to bolt and nut
- F16B33/02—Shape of thread; Special thread-forms
- F16B2033/025—Shape of thread; Special thread-forms with left-hand thread
Definitions
- the present invention refers to an unscrewing- preventing system for bolts.
- the bolt is a component formed of a screw (head with threaded stem) and a
- the nut usually of an hexagonal shape, is screwed on the stem of the screw to connect parts which must be mutually assembled.
- the nut tends to be loosened, so that different solutions are adopted, among which the addition of a lock nut.
- Object of the present invention is solving the above prior art problems, by providing an unscrewing-preventing system for bolts which is efficient, unmovable and capable of being easily made .
- Table II shows a sixth preferred embodiment of the system of the present invention.
- the present invention consists in unscrewing- preventing systems for bolts (with a simple use or a biting catch use) in which the male has a single or double threading; it has deformable inserts and reductions with tightening functions and, in the mentioned cases, uses special nuts.
- the material to be used for each of the solutions included in the above drawings must be complying with the needs corresponding to every single case. Therefore, the inventive idea is extended to any material which is used for making it.
- Figure 1 shows a first preferred embodiment of the unscrewing-preventing system of the present invention, which has a screw 1, a nut 2 and a lock nut 3.
- the screw 1 has a first threading a having a first diameter and a first inclination
- the lock nut 3 is equipped with a holding chamber c obtained on its side in contact with the nut 2, in order to perform the optimum seal when tightening.
- Figure 2 shows a second preferred embodiment of the unscrewing-preventing system of the present invention.
- the chamber c is replaced by a chamfered cone c', which allows obtaining the same functionality of the chamber c, but with a simpler construction and a better assembling functionality.
- Figure 3 shows a third preferred embodiment of the unscrewing-preventing system of the present invention, in which at least one ring-type insert 4 is introduced, to be placed in the chamber c'', which in this case is obtained both in the nut 2, and in the lock nut 3.
- the insert 4 can be made of steel, copper, brass, teflon and other plastic materials. The tightened coupling of the external diameter of the insert 4 with the diameter of the chamber c'' ensures the tightening, all together, of the three parts.
- Figure 4 shows a fourth preferred embodiment of the unscrewing-preventing system of the present invention, in which an external cylindrical reduction on the nut 2 is proposed.
- the lock nut 3 is instead made greater as longitudinal extension, with a chamber c whoce diameter fits in the external reduction of the nut 2. The thereby generated friction ensures the tightening.
- Figure 5 shows a fifth preferred embodiment of the unscrewing-preventing system of the present invention.
- the screw 1 has a cylindrical reduction at the end, and a lock nut 3 with a chamfered cone for the entry and a cylindrical reduction for coupling with the end of the screw 1. The thereby generated friction ensures the tightening in c' 1 '.
- Figure 1 shows a sixth preferred embodiment of the unscrewing-preventing system of the present invention, where the lock nut 3 is instead made shorter as longitudinal extension with respect to the nut 2, while the holding chamber c is removed. The thereby generated friction ensures the tightening.
Abstract
An unscrewing-preventing system is described, comprising: a screw (1), a nut (2) and a lock nut (3), wherein the screw (1) has a first threading (a) having a first diameter and a first thread inclination, and a second threading (b) having a second diameter, smaller than the first diameter, and a second thread inclination opposite to the first inclination, the lock nut (3) being equipped with a holding chamber (c) obtained on its side in contact with the nut (2), in order to perform a seal when tightening.
Description
UNSCRE ING-PREVENTING SYSTEMS THROUGH FRICTION FOR BOLTS
The present invention refers to an unscrewing- preventing system for bolts.
The invention finds application in the field of mechanics. In mechanics, the bolt is a component formed of a screw (head with threaded stem) and a
+ nut with a corresponding thread.
The nut, usually of an hexagonal shape, is screwed on the stem of the screw to connect parts which must be mutually assembled. When there are vibrations, stresses or impacts, the nut tends to be loosened, so that different solutions are adopted, among which the addition of a lock nut.
Currently, it is foreseen that a nut is assembled on the screw, followed, for a better safety, by a lock nut. However, cases can occur in which the loosening of the lock nut occurs and, consequently, the nut is also loosened.
Documents GB-A-238 487, US-A-1 539 213 and US- A-2 301 634 disclose unscrewing-preventing systems according to the prior art.
Object of the present invention is solving the above prior art problems, by providing an unscrewing-preventing system for bolts which is efficient, unmovable and capable of being easily made .
The above and other objects and advantages of the invention, as will appear from the following description, are obtained with an unscrewing-
+ preventing system for bolts as claimed in Claim 1.
Preferred embodiments and non-trivial variations of the present invention are the subject matter of the dependent claims.
It is intended that the enclosed claims are an integral part of the present description.
The present invention will be better described by some preferred embodiments thereof, provided as a non-limiting example, with reference to the enclosed drawings, in which, in Table I, the following are shown: in Figure 1 a first preferred embodiment of the system of the present invention; in Figure 2 a second preferred embodiment of the
system of the present invention; in Figure 3 a third preferred embodiment of the system of the present invention; in Figure 4 a fourth preferred embodiment of the system of the present invention; and in Figure 5 a fifth preferred embodiment of the system of the present invention, while Figure 1 in
Table II shows a sixth preferred embodiment of the system of the present invention.
With reference to the Figures, a preferred embodiment of the unscrewing-preventing system for bolts of the present invention is shown and
+ described. It will be immediately obvious that numerous variations and modifications (for example related to shape, sizes, various colors and parts with equivalent functionalities) could be made to what is described, without departing from the scope of the invention as appears from the enclosed claims .
The present invention consists in unscrewing- preventing systems for bolts (with a simple use or a biting catch use) in which the male has a single or double threading; it has deformable inserts and reductions with tightening functions and, in the mentioned cases, uses special nuts.
The material to be used for each of the solutions included in the above drawings must be complying with the needs corresponding to every single case. Therefore, the inventive idea is extended to any material which is used for making it.
In Table I, Figure 1 shows a first preferred embodiment of the unscrewing-preventing system of the present invention, which has a screw 1, a nut 2 and a lock nut 3. The screw 1 has a first threading a having a first diameter and a first inclination
+
(or orientation) of its thread, and a second threading b having a second diameter, smaller than the first diameter, and a second thread inclination opposite to the first inclination. The lock nut 3 is equipped with a holding chamber c obtained on its side in contact with the nut 2, in order to perform the optimum seal when tightening.
Figure 2 shows a second preferred embodiment of the unscrewing-preventing system of the present invention. In such Figure, the chamber c is replaced by a chamfered cone c', which allows obtaining the same functionality of the chamber c, but with a simpler construction and a better assembling functionality.
Figure 3 shows a third preferred embodiment of the unscrewing-preventing system of the present invention, in which at least one ring-type insert 4 is introduced, to be placed in the chamber c'', which in this case is obtained both in the nut 2, and in the lock nut 3. The insert 4 can be made of steel, copper, brass, teflon and other plastic materials. The tightened coupling of the external diameter of the insert 4 with the diameter of the chamber c'' ensures the tightening, all together, of the three parts.
+
Figure 4 shows a fourth preferred embodiment of the unscrewing-preventing system of the present invention, in which an external cylindrical reduction on the nut 2 is proposed. The lock nut 3 is instead made greater as longitudinal extension, with a chamber c whoce diameter fits in the external reduction of the nut 2. The thereby generated friction ensures the tightening. Finally, Figure 5 shows a fifth preferred embodiment of the unscrewing-preventing system of the present invention. Therein, the screw 1 has a cylindrical reduction at the end, and a lock nut 3 with a chamfered cone for the entry and a cylindrical reduction for coupling with the end of
the screw 1. The thereby generated friction ensures the tightening in c'1'.
In Table II, Figure 1 shows a sixth preferred embodiment of the unscrewing-preventing system of the present invention, where the lock nut 3 is instead made shorter as longitudinal extension with respect to the nut 2, while the holding chamber c is removed. The thereby generated friction ensures the tightening.
Claims
1. Unscrewing-preventing system comprising: a screw (1), a nut (2) and a lock nut (3), characterized in that said screw (1) has a first threading (a) having a first diameter and a first thread inclination, and a second threading (b) having a second diameter, smaller than the first diameter, and a second thread inclination opposite to the first inclination, said lock nut (3) being equipped with a holding chamber (c) obtained on its side in contact with the nut (2) , in order to
+ perform a seal when tightening.
2. Unscrewing-preventing system according to claim 1, characterized in that said lock nut (3) is equipped, in place of said chamber (c) , with a chamfered cone (c1) .
3. Unscrewing-preventing system according to claim 1 or 2, characterized in that both said nut (2) and said lock nut (3) are equipped with a chamber (c' ') inside which at least one ring-type insert (4) is placed, adapted to perform a coupling of nut (2) and lock nut (3) to obtain their tightening through friction.
4. Unscrewing-preventing system according to claim 3, characterized in that said insert (4) is
made of steel, copper, brass, teflon or other plastic materials.
5. Unscrewing-preventing system according to claim 1, characterized in that said nut (2) is equipped with an external cylindrical reduction, said lock nut (3) being equipped with a longitudinal extension which is much greater than the longitudinal extension of said nut (2) , said chamber (c) of said lock nut (3) having such a diameter as to fit into the external reduction of said nut (2) , generating a friction which ensures
+ the tightening.
6. Unscrewing-preventing system according to claim 1, characterized in that said screw (1) has a cylindrical reduction at its end, and said lock nut (3) is equipped with a chamfered cone for entry and with a cylindrical reduction for coupling with the end of the screw (1), the thereby generated friction ensuring the tightening (in c''1)- 7. Unscrewing-preventing system according to claim 1, characterized in that the longitudinal extension of said lock nut (3) is shorter than the longitudinal extension of said nut (2), the holding chamber (c) being removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IT2014/000330 WO2016092572A1 (en) | 2014-12-11 | 2014-12-11 | Unscrewing-preventing systems through friction for bolts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IT2014/000330 WO2016092572A1 (en) | 2014-12-11 | 2014-12-11 | Unscrewing-preventing systems through friction for bolts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016092572A1 true WO2016092572A1 (en) | 2016-06-16 |
Family
ID=52573695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT2014/000330 WO2016092572A1 (en) | 2014-12-11 | 2014-12-11 | Unscrewing-preventing systems through friction for bolts |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2016092572A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763074A (en) * | 2017-02-16 | 2017-05-31 | 浙江华东科技检测有限公司 | Thickness tooth left-right rotary combines check bolt |
| CN108240391A (en) * | 2016-12-23 | 2018-07-03 | 李瑛� | A kind of tight screw |
| CN110056564A (en) * | 2019-04-20 | 2019-07-26 | 吴小康 | A kind of bolt and nut connection anti-loose structure with combine |
| CN110159640A (en) * | 2019-05-30 | 2019-08-23 | 深圳市南帝自行车有限公司 | A kind of anti-loosening screw nut assembly |
| US11109670B2 (en) | 2016-10-27 | 2021-09-07 | Steelcase Inc. | Flip top table |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US853150A (en) * | 1907-02-23 | 1907-05-07 | Frank E Bartz | Nut-lock. |
| US1093050A (en) * | 1912-02-10 | 1914-04-14 | Otto A Heckel | Nut-lock. |
| US1467824A (en) * | 1922-06-24 | 1923-09-11 | David E Ahlers | Bolt and nut lock |
| US1539213A (en) | 1923-03-29 | 1925-05-26 | Shaw George | Means for locking nuts upon bolts |
| GB238487A (en) | 1925-04-04 | 1925-08-20 | Hubert Dollman | Improvements in lock nuts |
| FR751892A (en) * | 1932-06-08 | 1933-09-11 | Device intended to ensure that the nuts cannot be locked | |
| US2301634A (en) | 1941-02-01 | 1942-11-10 | Nicholay Paul | Lock nut |
| US2313763A (en) * | 1941-12-24 | 1943-03-16 | Louis E Olsen | Nut assembly |
| JP2004204867A (en) * | 2002-12-24 | 2004-07-22 | Etsuzo Kuinose | Lock device for screw |
| WO2014125514A1 (en) * | 2013-02-14 | 2014-08-21 | Michele Eramo | Unscrewing-preventing system with friction for bolts |
-
2014
- 2014-12-11 WO PCT/IT2014/000330 patent/WO2016092572A1/en active Application Filing
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US853150A (en) * | 1907-02-23 | 1907-05-07 | Frank E Bartz | Nut-lock. |
| US1093050A (en) * | 1912-02-10 | 1914-04-14 | Otto A Heckel | Nut-lock. |
| US1467824A (en) * | 1922-06-24 | 1923-09-11 | David E Ahlers | Bolt and nut lock |
| US1539213A (en) | 1923-03-29 | 1925-05-26 | Shaw George | Means for locking nuts upon bolts |
| GB238487A (en) | 1925-04-04 | 1925-08-20 | Hubert Dollman | Improvements in lock nuts |
| FR751892A (en) * | 1932-06-08 | 1933-09-11 | Device intended to ensure that the nuts cannot be locked | |
| US2301634A (en) | 1941-02-01 | 1942-11-10 | Nicholay Paul | Lock nut |
| US2313763A (en) * | 1941-12-24 | 1943-03-16 | Louis E Olsen | Nut assembly |
| JP2004204867A (en) * | 2002-12-24 | 2004-07-22 | Etsuzo Kuinose | Lock device for screw |
| WO2014125514A1 (en) * | 2013-02-14 | 2014-08-21 | Michele Eramo | Unscrewing-preventing system with friction for bolts |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11109670B2 (en) | 2016-10-27 | 2021-09-07 | Steelcase Inc. | Flip top table |
| US11589672B2 (en) | 2016-10-27 | 2023-02-28 | Steelcase Inc. | Flip top table |
| CN108240391A (en) * | 2016-12-23 | 2018-07-03 | 李瑛� | A kind of tight screw |
| CN106763074A (en) * | 2017-02-16 | 2017-05-31 | 浙江华东科技检测有限公司 | Thickness tooth left-right rotary combines check bolt |
| CN110056564A (en) * | 2019-04-20 | 2019-07-26 | 吴小康 | A kind of bolt and nut connection anti-loose structure with combine |
| CN110159640A (en) * | 2019-05-30 | 2019-08-23 | 深圳市南帝自行车有限公司 | A kind of anti-loosening screw nut assembly |
| WO2020237910A1 (en) * | 2019-05-30 | 2020-12-03 | 深圳市南帝自行车有限公司 | Anti-loose screw nut assembly |
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