WO2004113744A1 - ボルトとナットの緩み止め構造 - Google Patents
ボルトとナットの緩み止め構造 Download PDFInfo
- Publication number
- WO2004113744A1 WO2004113744A1 PCT/JP2004/008632 JP2004008632W WO2004113744A1 WO 2004113744 A1 WO2004113744 A1 WO 2004113744A1 JP 2004008632 W JP2004008632 W JP 2004008632W WO 2004113744 A1 WO2004113744 A1 WO 2004113744A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nut
- bolt
- lock nut
- peripheral surface
- lock
- Prior art date
Links
- 230000002265 prevention Effects 0.000 title claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 47
- 238000012360 testing method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000035939 shock Effects 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
- F16B39/122—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts foreseen with mating surfaces inclined, i.e. not normal, to the bolt axis
Definitions
- the present invention relates to a bolt and nut locking structure, and more particularly to a bolt and nut locking structure for locking a nut screwed into a bolt.
- this bolt and nut locking structure has the following disadvantages. That is, the direction in which the lower nut was screwed into the bolt was the same as the direction in which the lock nut to be tightened from above the nut was screwed into the bolt. As a result, when vibrations or shocks are applied in a particular direction, the upper and lower nuts tend to loosen simultaneously in that direction.
- the invention according to claim 1 provides a bolt including a bolt, a nut member screwed to the bolt by a female screw formed on an inner peripheral surface, and a lock nut for locking the nut member to the bolt.
- a nut wherein the nut member has a lock nut engaging portion formed in a tapered or straight shape toward one end in the axial direction.
- Has an external thread formed on the outer peripheral surface in the same or opposite thread direction as the internal thread on the inner peripheral surface has a slit extending toward one end in the axial direction, and has a lock nut screwed onto the male screw. The bolts and nuts are locked together by locking the nut members to the bolts.
- the nut member has a cylindrical shape as a whole, and a female screw is threaded on an inner peripheral surface of a shaft hole having a circular cross section.
- the nut member has a wrench locking portion at the other end in the axial direction, and is formed to taper from the wrench locking portion toward one end in the axial direction or to be straight toward one end in the axial direction.
- the tapered shape means that the lock nut locking portion has a truncated conical shape as a whole, and its outer diameter continuously decreases from the other end toward one end.
- the straight shape means that the outer diameter is the same in the axial direction.
- the axial length of the lock nut engaging portion is not limited.
- the lock nut engaging portion has a slit extending toward one end of the axial force and the other end.
- the number of the slits may be at least one.
- the pair of slits can be formed symmetrically. Then, the elastic deformation of the lock nut engaging portion is facilitated.
- a male screw is formed in the same screw direction as the inner peripheral surface of the nut member or in the reverse screw direction.
- the other end of the nut member in the axial direction is provided with a spanner engaging portion for fastening the nut member to a bolt.
- the shape of this wrench locking part can be polygonal such as hexagonal or circular. Also, it is better that the width of the spanner locking portion is as wide as possible.
- the member to be fastened is sandwiched between the bolt and the nut.
- the member to be fastened may be single or plural.
- Bolts shall include stud bolts.
- Bonoleto and lock nuts can be polygonal or circular. The material, size, shape, etc. of the bolts, nut members and lock nuts do not matter. For example, these materials are used for SS400.
- the bolt and nut locking structure according to the first aspect, first, the bolt is rotated in one direction and screwed to the nut member. In this case, the bolt is passed through the member to be fastened. Next, rotate the lock nut around the lock nut locking portion of the nut member in the same Or screw in the opposite direction. Thereby, the bolt is screwed into the nut member, and the nut member is tightened by the lock nut.
- the lock nut engaging portion is formed to be tapered or straight toward one end in the axial direction. Further, a slit is formed in the lock nut locking portion.
- the lock nut is tightened to the nut member to which the bolt is screwed. Then, the slit is elastically deformed so as to narrow the tip side. Thereby, the tightness between the outer peripheral surface of the lock nut engaging portion and the inner peripheral surface of the lock nut is increased. And this adhesion makes the fastening between the bolt and the nut member stronger. As a result, the bolt is firmly fastened to the nut member, and the lock nut is firmly fastened to the nut member.
- the external thread formed on the outer peripheral surface of the lock nut engaging portion of the nut member is a fine thread.
- Fine thread has a smaller thread pitch than regular thread. If the pitch is small, the contact area between the outer peripheral surface of the nut member and the inner peripheral surface of the lock nut increases. Therefore, it is difficult to loosen a fine thread than a coarse thread.
- the fine screw is applied, for example, to a place where vibration or impact is strong.
- the external thread formed on the outer peripheral surface of the lock nut engaging portion of the nut member is a fine thread. Fine threads have a smaller thread pitch than coarse threads. If the pitch is small, the contact area between the outer peripheral surface of the nut member and the inner peripheral surface of the lock nut increases. Therefore, the Itodame screw is less likely to loosen than the coarse screw.
- the fine screw is applied to, for example, a place where vibration or impact is strong.
- the bolt is screwed to the nut member by rotating the bolt in one direction.
- the lock nut is screwed into the lock nut engaging portion of the nut member in the same or reverse direction as the above.
- the bolt is screwed into the nut member, and the nut member is It is tightened with a nut.
- the lock nut engaging portion is formed to be tapered or straight toward one end in the axial direction. Further, a slit is formed in the lock nut locking portion.
- the slit deforms so as to narrow the tip end side. Thereby, the adhesion (frictional force) between the outer peripheral surface of the lock nut engaging portion and the inner peripheral surface of the lock nut increases. And this adhesion makes the fastening between the bolt and the nut member stronger. As a result, the bolt is firmly fastened to the nut member, and the lock nut is firmly fastened to the nut member.
- This bolt and nut locking structure can be applied, for example, to places involving vibration and impact such as internal combustion engines and railways.
- this bolt and nut locking structure can be applied to existing bolts such as stud bolts.
- the lock nut can be fastened to the nut member in the middle of the bolt and stopped.
- FIG. 1 is a front view of a part of a bolt and nut locking structure according to a first embodiment of the present invention, which is partially cut away.
- FIG. 2 is an exploded view showing a bolt and nut locking structure according to Embodiment 1 of the present invention.
- FIG. 3 is an exploded view showing a bolt and nut locking structure according to Embodiment 1 of the present invention.
- FIG. 4 is a cross-sectional view showing a configuration of a test device for testing a bolt and nut locking structure according to Embodiment 1 of the present invention.
- FIG. 5 is a front view showing a state in which the stud of the bolt and nut locking structure according to the first embodiment of the present invention is applied.
- FIG. 6 is a front view showing a state in which the bolt and the nut according to Embodiment 1 of the present invention are locked in the middle of a bolt having a locking structure.
- FIG. 7 is a front view showing a state in which a pipe with a bolt and nut locking structure according to Embodiment 1 of the present invention is fixed.
- FIG. 8 is a partial cutaway view of a bolt and nut locking structure according to Embodiment 2 of the present invention. It is a front view of a leg.
- FIG. 9 is a front view showing a bolt and nut locking structure according to the related art.
- the bolt and nut locking structure is configured such that the (upper and lower) superimposed (horizontal) members to be fastened 21, 22 are fastened by bolts 11 and nut members 12, It is configured by locking (strongly fixing) the member 12 with the lock nut 13.
- the bolt 11 uses a general-purpose product.
- the bonoleto 11 has a hexagonal head 24 and a shaft 23 with a screw (coarse thread) screwed on the distal end side with a predetermined length integral therewith.
- the nut member 12 has a hexagonal spanner locking portion 25 at its lower portion (the other end in the axial direction), and a lock nut locking portion 14 at the upper portion (the one end in the axial direction). It is provided continuously.
- a female screw to be screwed with the male screw of the bolt 11 is formed.
- the lock nut engaging portion 14 formed at one axial end of the nut member 12 is tapered toward one end thereof.
- the lock nut locking portion 14 is formed with a pair of slits 17 extending from one end in the axial direction to the other end.
- the pair of slits 17 are provided in parallel with each other at a distance of a semicircle (180 degrees).
- the length and width of the slit 17 are arbitrary.
- the outer peripheral surface 16 of the lock nut engaging portion 14 has a male screw (Itoda female screw) that is threaded in a reverse screw direction to the inner peripheral surface 15.
- a male screw threaded in the same screw direction as the inner peripheral surface 15 may be formed.
- This external thread is a fine thread having a small pitch of the thread thread on the inner peripheral surface 15.
- a coarse thread can be formed on the outer peripheral surface.
- the lock nut 13 is screwed into a male screw on the outer peripheral surface 16 of the lock nut engaging portion 14.
- the lock nut 13 is formed of a hexagon nut having an outer diameter larger than that of the nut member 12.
- a female screw to be screwed with the male screw of the nut member 12 is formed on the inner peripheral surface 18 of the lock nut 13, a female screw to be screwed with the male screw of the nut member 12 is formed.
- This female screw is also a fine screw similar to the male screw of the lock nut engaging portion 14.
- the inner peripheral surface 18 of the lock nut 13 is tapered toward one end in the axial direction. That is, the female screw of the lock nut 13 is formed on a tapered surface.
- a unidirectional force bolt is applied to each of the mounting holes of the horizontally fastened members (steel plates having a predetermined thickness) 21 and 22 which are vertically stacked. Screw in 11.
- the shaft 23 of the bolt 11 is inserted through the mounting holes of the members 21 and 22 to be fastened, and the tip of the shaft 23 projects from the mounting hole by a predetermined length.
- the nut member 12 is screwed in one direction to the tip of the shaft portion 23 of the bolt 11 from the other direction into the members to be fastened 21, 22.
- the lock nut 13 is screwed into the lock nut locking portion 14 of the nut member 12. You.
- the lock nut engaging portion 14 of the nut member 12 is tightened toward the axial center of the nut member 12.
- the lock nut locking portion 14 is formed in a tapered shape toward one end in the axial direction, and the lock nut locking portion 14 is provided with a slit 17.
- the lock nut engaging portion 14 is deformed by the slit 17 so as to taper toward one end in the axial direction.
- the adhesion between the outer peripheral surface of the lock nut engaging portion 14 and the inner peripheral surface of the lock nut 13 increases.
- the adhesion between the inner peripheral surface (female screw) of the lock nut engaging portion 14 and the male screw of the bolt 11 is also increased. And this adhesion makes the connection between the bolt 11 and the nut member 12 stronger. As a result, the bolt 11 is firmly fastened to the nut member 12, and the lock nut 13 is firmly fastened to the nut member 12.
- Fig. 4 shows a looseness tester (NAS-type high-speed screw looseness tester) that performs a vibration test of a commonly used bolt and nut fastening structure.
- This looseness tester is provided with a vibrating table 33 for vibrating an object to be vibrated.
- the vibration table 33 vibrates the vibration target in the vertical direction or the horizontal direction.
- a cylindrical vibration barrel 34 for fixing an object to be vibrated is provided on the vibration table 33.
- the one-way bolt 11 is inserted into the vibrating barrel 34 substantially horizontally.
- the nut member 12 shape: M12
- the nut member 12 shape: M12
- the lock nut 13 is screwed into the lock nut engaging portion 14 of the nut member 12.
- Vibration tests were performed on these loose structures on a looseness tester.
- the vibration test conditions were as follows: the vibration direction was vertical, the vibration frequency was 1780 rpm, the width A of the vibration table stroke was 11 mm, and the width B of the impact stroke was 19 mm. Under these conditions, an experiment was performed in which the tightening torque for tightening Bonoreto 11 to the nut member 12 was changed.
- Table 1 shows the results when the external thread on the outer peripheral surface 16 of the lock nut engaging portion 14 is formed in the reverse screw direction to the internal thread on the inner peripheral surface 15 (Case 1).
- Table 2 shows the results for cases formed in the same screw direction (case 2).
- Table 2 also shows the results of ordinary hexagon nuts, U nuts, and grooved nuts for reference.
- the matching mark described on the bolt 11, the nut member 12, and the jig washer 35 is used.
- the vibration test when the position of the matching mark is shifted and the jig washer 35 can be turned by hand, it is judged that the jig was loosened.
- the vibration test was performed for 15 minutes, and when the jig was loosened for 15 minutes, the return torque was measured.
- Lock nut Ml 2 7 5 0 5 0 1 5 did not loosen 4 2.1 36.7 Lock lock nut M l 2 6 0 6 0 1 5 did not loose 5 7 .0 0 .0
- the bolt and nut locking structure according to the present invention can be applied to places involving vibration and impact such as internal combustion engines and railways.
- the bolt and nut locking structure of the present invention can be applied to the following cases.
- the nut member 12 and the lock nut 13 are fastened to the stud 11 having no screw function.
- the nut member 12 is inserted from the tip of the shaft portion 23 of the stud bolt 11 screwed to the members to be fastened 21, 22.
- the nut member 12 is screwed into the stud 11, and the lower surface of the spanner engaging portion 25 of the nut member 12 is brought into contact with the members to be fastened 21, 22.
- the lock nut 13 is screwed into the nut member 12.
- the lock nut 13 is tightened, the nut member 12 is firmly in contact with the members to be fastened 21 and 22, and an external force acts on the stud 11. As a result, it becomes possible to remove the implantable bonole 11 screwed in a state extending to the members to be fastened 21, 22.
- the bolt and nut locking structure according to the present invention has a slit at the lock nut engaging portion as described above.
- the U-bonoleto 11 is locked to the knob 30, and the two legs of the U-bolt 11 protrude from the fixing member 32. Threads are formed at the tips of the two legs of the bolt 11, respectively. Then, the nut members 12 are screwed into the threads. Further, the lock nut 13 is tightened to the nut member 12. At this time, the nut member 12 and the lock nut 13 are stopped at a predetermined interval (D portion) from the fixing member 32. This allows gas temperature changes Thus, even if the pipe 30 expands, the pipe 30 is not damaged. Further, even if the pipe 30 contracts, the nut member 12 and the lock nut 13 do not come off from the bolt 11.
- D portion a predetermined interval
- the bolt and nut locking structure according to the present embodiment is the same as the bolt and nut locking structure according to the first embodiment except that the following changes are made. That is, the lock nut locking portion 14 is formed straight toward one end in the axial direction.
- the term “formed straight” means that the thickness in the axial direction is constant, that is, the shape is cylindrical.
- the inner peripheral surface of the lock nut 13 is formed with a female screw in a tapered shape. Other configurations are the same as those in the first embodiment.
- the lock nut 13 Tighten the lock nut 13 to the lock nut engaging portion 14 of the nut member 12. Then, it is tightened from one end side of the lock nut locking portion 14, and the slit is deformed so that the tip is narrowed.
- the tip of the first embodiment is more tightly tightened from one end side than the nut member 12 having the tapered lock nut locking portion 14.
- the nut member 12 is faster than the nut member 12 of the first embodiment and the force is firmly tightened. Since the one end side is tightened tightly, the length of the lock nut 13 in the height direction may be reduced to approximately 1/2.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/560,750 US20070071573A1 (en) | 2003-06-18 | 2004-06-18 | Loosening prevention structure for bolt and nut |
EP04746134A EP1635078A4 (en) | 2003-06-18 | 2004-06-18 | STRUCTURE FOR PREVENTING BOLT AND NUT RELEASE |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003173753 | 2003-06-18 | ||
JP2003-173753 | 2003-06-18 | ||
JP2003-410893 | 2003-09-12 | ||
JP2003410893A JP2005030584A (ja) | 2003-06-18 | 2003-12-09 | ボルト・ナットの緩み止め構造 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004113744A1 true WO2004113744A1 (ja) | 2004-12-29 |
Family
ID=33543471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/008632 WO2004113744A1 (ja) | 2003-06-18 | 2004-06-18 | ボルトとナットの緩み止め構造 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070071573A1 (ja) |
EP (1) | EP1635078A4 (ja) |
JP (1) | JP2005030584A (ja) |
WO (1) | WO2004113744A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110307239A (zh) * | 2019-08-08 | 2019-10-08 | 朱正唯 | 一种防松动组合螺母 |
CN113586581A (zh) * | 2021-09-09 | 2021-11-02 | 江苏宁欣汽车零部件有限公司 | 一种用于车辆的防脱u型螺栓 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011247352A (ja) * | 2010-05-27 | 2011-12-08 | Sekisui Chem Co Ltd | バルブの緩み止め構造 |
KR101969033B1 (ko) * | 2012-11-20 | 2019-04-15 | 엘지전자 주식회사 | 태양 전지 모듈 및 이를 포함하는 태양광 발전 장치 |
CN106337867B (zh) * | 2016-10-17 | 2018-06-26 | 广西师范大学 | 一种锥形螺纹连接机构 |
JP6813890B2 (ja) * | 2017-08-09 | 2021-01-13 | ハードロック工業株式会社 | 調整ボルトの緩み止め構造 |
CN111609022B (zh) * | 2020-05-06 | 2022-02-15 | 杨恒海 | 一种防松动组合螺母 |
CN111473035A (zh) * | 2020-05-15 | 2020-07-31 | 申秀云 | 一种止动槽螺母防松装置 |
CN115076204B (zh) * | 2022-05-31 | 2023-12-26 | 鄂尔多斯应用技术学院 | 一种航空航天用紧固件 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5345354U (ja) * | 1976-09-20 | 1978-04-18 | ||
JPS5520776U (ja) * | 1978-07-29 | 1980-02-09 | ||
JPS58119611U (ja) * | 1982-02-10 | 1983-08-15 | 日産自動車株式会社 | 緩み止めナツト |
JPS62113907A (ja) * | 1985-11-13 | 1987-05-25 | 小松 実 | ダブルナツト |
JPH0484821U (ja) * | 1990-11-30 | 1992-07-23 | ||
JP2001323914A (ja) * | 2000-05-17 | 2001-11-22 | Chinao Yamashita | ナットの逆転防止装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1081239A (en) * | 1913-01-28 | 1913-12-09 | Charles J Lantz | Nut-lock. |
US1157596A (en) * | 1913-08-22 | 1915-10-19 | Selman Liss | Lock-nut. |
US1207356A (en) * | 1916-03-13 | 1916-12-05 | Herbert B Wright | Lock-nut. |
GB153227A (en) * | 1920-03-19 | 1920-11-04 | Charles Stewart Hastings Snow | Improvements in nut locks |
US1524099A (en) * | 1923-08-20 | 1925-01-27 | Luther F Morehead | Loose-lug lock nut |
US2191201A (en) * | 1938-03-01 | 1940-02-20 | Samuel M Kass | Lock nut |
DE1962009A1 (de) * | 1969-12-11 | 1971-06-16 | Buechel Eugen | Feststellschraube mit Mchrkantkopf,bei welcher auf der Schraube eine Zwischenmutter und auf dieser eine Feststellschraube sitzt |
NO159616C (no) * | 1985-06-19 | 1989-01-18 | Harald Kolvereid | L smutter. |
US4909689A (en) * | 1987-03-05 | 1990-03-20 | Noboru Sado | Double locknut assembly |
JP3182117B2 (ja) * | 1997-09-25 | 2001-07-03 | 株式会社石亀工業 | ナット合わせ手段付きロックナット |
US6808348B1 (en) * | 2003-04-09 | 2004-10-26 | Alcon Global Fasteners, Inc. | Lock nut member |
-
2003
- 2003-12-09 JP JP2003410893A patent/JP2005030584A/ja active Pending
-
2004
- 2004-06-18 US US10/560,750 patent/US20070071573A1/en not_active Abandoned
- 2004-06-18 WO PCT/JP2004/008632 patent/WO2004113744A1/ja active Application Filing
- 2004-06-18 EP EP04746134A patent/EP1635078A4/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5345354U (ja) * | 1976-09-20 | 1978-04-18 | ||
JPS5520776U (ja) * | 1978-07-29 | 1980-02-09 | ||
JPS58119611U (ja) * | 1982-02-10 | 1983-08-15 | 日産自動車株式会社 | 緩み止めナツト |
JPS62113907A (ja) * | 1985-11-13 | 1987-05-25 | 小松 実 | ダブルナツト |
JPH0484821U (ja) * | 1990-11-30 | 1992-07-23 | ||
JP2001323914A (ja) * | 2000-05-17 | 2001-11-22 | Chinao Yamashita | ナットの逆転防止装置 |
Non-Patent Citations (1)
Title |
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See also references of EP1635078A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110307239A (zh) * | 2019-08-08 | 2019-10-08 | 朱正唯 | 一种防松动组合螺母 |
CN113586581A (zh) * | 2021-09-09 | 2021-11-02 | 江苏宁欣汽车零部件有限公司 | 一种用于车辆的防脱u型螺栓 |
CN113586581B (zh) * | 2021-09-09 | 2022-08-26 | 江苏宁欣汽车零部件有限公司 | 一种用于车辆的防脱u型螺栓 |
Also Published As
Publication number | Publication date |
---|---|
EP1635078A4 (en) | 2008-02-27 |
EP1635078A1 (en) | 2006-03-15 |
JP2005030584A (ja) | 2005-02-03 |
EP1635078A9 (en) | 2006-10-18 |
US20070071573A1 (en) | 2007-03-29 |
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