WO2003067104A1 - Ecrou de blocage - Google Patents

Ecrou de blocage Download PDF

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Publication number
WO2003067104A1
WO2003067104A1 PCT/JP2003/001098 JP0301098W WO03067104A1 WO 2003067104 A1 WO2003067104 A1 WO 2003067104A1 JP 0301098 W JP0301098 W JP 0301098W WO 03067104 A1 WO03067104 A1 WO 03067104A1
Authority
WO
WIPO (PCT)
Prior art keywords
nut
final
locking
locking nut
tightening
Prior art date
Application number
PCT/JP2003/001098
Other languages
English (en)
Japanese (ja)
Inventor
Ryusuke Mashima
Original Assignee
Mashima Seisakusyo Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2002028142A external-priority patent/JP2003227508A/ja
Priority claimed from JP2002381628A external-priority patent/JP2003294021A/ja
Application filed by Mashima Seisakusyo Co., Ltd. filed Critical Mashima Seisakusyo Co., Ltd.
Priority to AU2003211911A priority Critical patent/AU2003211911A1/en
Publication of WO2003067104A1 publication Critical patent/WO2003067104A1/fr

Links

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
    • 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
    • F16B39/026—Locking of screws, bolts or nuts in which the locking takes place after screwing down by swaging the nut on the bolt, i.e. by plastically deforming the nut

Definitions

  • the present invention relates to a fastening technique for various mechanical devices and building steel frames, and more particularly, to a fastening nut which is screwed onto a male screw portion (such as a port) from a fastening nut.
  • the present invention relates to a locking nut for preventing loosening.
  • a port and a nut as fastening means may be gradually loosened by an external force such as vibration, and various means have been proposed as means for preventing such loosening of the nut.
  • This double nut is designed so that one nut (final fastening nut) screwed to a male thread (porto etc.) is tightened from the other nut (locking nut). Both nuts are prevented from loosening by the action of tightly tightening the nuts.
  • the seating surface (axial end surface) of the locking nut has the same area as the seating surface of the final fastening nut.
  • the protrusion formed on the conventional lock nut functions only when it is crushed, and is not a protrusion for plastically deforming the female screw portion of the nut for final tightening.
  • the locknut cannot be reused as a locknut because it is crushed.
  • the conventional lock nut functions only when the projections are crushed, the hardness of the material must be equal to or less than the hardness of the material of the nut for final fastening.
  • the projection cannot be reused as a lock nut because the projection is crushed.
  • the present invention has been made in order to solve the above-described problems, and securely tightens both nuts while preventing the nuts for final tightening from rotating together when the nuts for locking are tightened.
  • the primary task is to provide a locking nut that can be matched.
  • the female thread of the final fastening nut is plastically deformed by the locking nut, and the final fastening nut itself has a function of preventing loosening, so that the fastening work is simplified and the locking nut is further reduced.
  • the second problem is to prevent the nut for final tightening from being loosened even if the lock is loosened, and to provide a locking nut that can be reused. . Disclosure of the invention
  • a locking nut (claim 1) of the present invention comprises:
  • a locking nut that is designed to prevent loosening of the final fastening nut by tightening from above the final fastening nut screwed into the male thread.
  • An annular projection is formed on the axial end face
  • An annular seating surface for contacting the seating surface of the nut for final fastening is formed at the tip of the annular projection.
  • the configuration was such that the area of the annular seating surface was formed smaller than the area of the axial end surface.
  • This locking nut (Claim 1) is used by being tightened from above a nut for final tightening screwed to a male thread portion such as a port. That is, the annular projection has a nut for final tightening. With the male thread so that it faces ⁇ .
  • the annular seating surface is pressed annularly against the seating surface of the final fastening nut when the locking nut is tightened.
  • the pressing force can be applied evenly to the seating surface of the nut for final fastening, and when the annular projection breaks even if the annular seating surface bites into the seating surface of the nut for final fastening. As a result, pressure can be reliably applied to the nut for final fastening.
  • the female screw part of the nut for final fastening is formed with a protrusion for plastic deformation.
  • the locking nut according to the present invention (Claim 2) is used by tightening from above a final fastening nut screwed into a male thread portion such as a porto, that is, a protrusion faces the final fastening nut. Screw it into the male screw part.
  • the projection is formed at the periphery of the screw hole, and the tip of the projection comes into contact with the periphery of the screw hole of the nut for final fastening. .
  • the tip of the protrusion is pressed against the periphery of the screw hole of the final tightening nut, and the pressing force causes the female screw of the final tightening nut.
  • the part is plastically deformed.
  • the nut for final tightening has its own locking function.
  • the hardness of the material of the nut for locking is mainly determined. The hardness is higher than the hardness of the nut material.
  • FIG. 1 is a cross-sectional view of a double-nut structure using a locking nut of an embodiment according to claim 1 of the present invention.
  • FIG. 2 is a half sectional view of the lock nut.
  • FIG. 3 is a half sectional view showing another example of the annular projection.
  • FIG. 4 is a half sectional view showing another example of the annular projection.
  • FIG. 5 is a half cross-sectional view showing another example of a nut for sucking.
  • FIG. 6 is a cross-sectional view of a double-nut structure using the locking nut of the embodiment according to claim 2 of the present invention.
  • FIG. 7 is a bottom view of the locking nut.
  • FIG. 8 is an enlarged sectional view of the locking nut.
  • FIG. 9 is an enlarged cross-sectional view showing another example of the projection formed on the locking nut.
  • FIG. 10 is an enlarged half-sectional view showing another example of the protrusion formed on the locking nut.
  • FIG. 11 is an enlarged half-sectional view showing another example of the protrusion formed on the locking nut.
  • FIG. 12 is an enlarged half-sectional view showing another example of the protrusion formed on the locking nut.
  • FIG. 13 is an enlarged half-sectional view showing another example of the protrusion formed on the locking nut.
  • FIG. 14 is a bottom view showing another example of the locking nut of the present invention.
  • FIG. 15 is an enlarged sectional view of the locking nut.
  • FIG. 16 is a bottom view showing another example of the locking nut of the present invention.
  • FIG. 17 is a cross-sectional view of the locking nut.
  • FIG. 18 is a bottom view showing another example of the lock nut of the present invention.
  • FIG. 19 is a cross-sectional view of the locking nut.
  • FIG. 1 is a cross-sectional view of a double-nut structure using the locking nut of the embodiment
  • FIG. 2 is a half-sectional view of the locking nut.
  • this lock nut 1 is It is formed in a hexagonal nut shape with a female screw 11 formed on its surface, and an annular projection 13 is formed on one axial end surface 12 at the periphery of the screw hole.
  • the other axial end surface 14 may be formed as a flat seat surface, or may be formed with a similar annular projection.
  • the annular projection 13 is formed in a cylindrical shape at the periphery of the screw hole of the axial end face 12, and a tip thereof is formed in a circularly continuous annular seating face 15. The area is formed smaller than the area of the axial end face 12.
  • the area of the annular seating surface 15 is made smaller than the area of the axial end surface 12 by making the width a of the annular seating surface 15 smaller than the width b from the nut outer periphery 16 to the screw hole 10.
  • 3 and 4 are half sectional views showing other examples of the annular projection.
  • Fig. 3 shows an example in which an annular projection 13 is formed in the middle part between the nut outer periphery 16 of the axial end face 12 and the screw hole 10; the example of Fig. 4 shows a screw from the nut outer periphery 16 This is an example in which an annular projection 13 inclined in a tapered shape toward the hole 10 is formed.
  • the lock nut 1 is used as a double nut with the final tightening nut 2.
  • the male nut of the bolt 4 passed through the members 3 to be tightened is used.
  • the locking nut 1 is moved so that the annular projection 13 faces the nut 2 for final fastening. Screw it into the male thread part 40 of the bolt 4.
  • annular seating surface 15 is used, the annular seating surface 15 is annularly pressed against the seating surface 20 of the final tightening nut 2 as the locking nut 1 is tightened.
  • the pressing force accompanying the tightening of the locking nut 1 can be evenly applied to the seating surface 20 of the nut for final tightening 2, and the annular seating surface 15 can be applied to the nut for final tightening. Even if it penetrates into the seating surface 20 of the second 2, the annular projection 13 is not crushed, and the pressure can be reliably applied to the nut 2 for final fastening.
  • FIG. 5 is a half-sectional view showing another example of a locking nut.
  • the locking nut 1 is formed by drawing a steel plate with a press to form the main body 1a. After molding, the female screw 11 is machined to form a locking nut 1.
  • the shape of the annular projection 13 can be formed in the same manner as in FIGS. 2, 3, and 4. it can.
  • the material of the lock nut 1 is not particularly limited, and may be steel (SWCH 8-: L0, SS400, S45C, etc.), high tension steel, stainless steel (SUS3 04, etc.), alloy steel (SCM 435, etc.), titanium, and other synthetic resins such as aluminum, copper, rigid PVC, polycarbonate, etc. if they have a higher hardness than the material of the nut 2 for final fastening. Etc. It can be used, and the shape is not limited to a hexagonal nut shape, but may be a square nut shape or the like.
  • FIG. 6 is a sectional view of a double nut structure using a locking nut according to an embodiment of the present invention
  • FIG. 7 is a bottom view of the locking nut
  • FIG. 8 is an enlarged sectional view of the locking nut. It is.
  • the nut 6 for locking has a hexagonal nut shape in which a female screw portion 61 is formed on the inner peripheral surface of the screw hole 60.
  • Four single-width protrusions 63 are formed at the same interval along the periphery of the screw hole of one axial end face (bottom face) 62 of the nut body 6a.
  • the other end surface (upper surface) 64 in the axial direction may be formed on a flat surface, or may have a similar projection.
  • the shape of the nut body 6a is not limited to a hexagonal nut shape, but can be formed into a square nut shape, and the nut body 6a can be formed by drawing a steel plate by pressing. Can also.
  • Each of the protrusions 63 is formed integrally with the nut body 6a at the periphery of the screw hole of the axial end face 62, and the side surface thereof is formed in a convex arc shape as shown in FIG. However, its cross-sectional shape is formed in a square shape.
  • the number of protrusions 63 is not limited to four in the embodiment, but may be one, or two, three, five, six, or the like.
  • the side surface shape of the protrusion 63 may be a square shape as shown in FIG. 9, the cross-sectional shape thereof is a triangular shape as shown in FIG. 10, a chevron shape as shown in FIG. It can be formed in a semicircular shape as shown in FIG. 12 and in a circular arc shape as shown in FIG.
  • the locking nut 6 is used for final tightening as shown in FIG.
  • Nut 7 is used as a double nut.
  • the material of the final fastening nut 7 is generally made of mild steel, but the locking nut 6 of the present embodiment has a higher hardness than the material of the final fastening nut 7. It is formed of a material.
  • Specific materials include steel (SWCH8-10, SS400, S405C, etc.), high tension steel, stainless steel (SUS304, etc.), alloy steel (SCM435) Etc.), titanium, and other synthetic resins such as aluminum, copper, hard vinyl chloride-polycarbonate, etc., as long as the hardness is higher than the material of the nut 2 for final fastening.
  • the final fastening nut 7 is screwed into the male screw portion 90 of the bolt 9 passed through the members to be fastened 8, 8 to fasten the members to be fastened 8, and then the The nut 6 is screwed into the male screw portion 90 such that the projection 63 faces the nut 7 for final fastening.
  • the tip of the projection 63 comes into contact with the periphery of the screw hole of the nut 7 for final tightening, but when the nut 6 for locking is further tightened, the tip of the projection 63 becomes The female screw 70 is plastically deformed at the screw hole opening of the nut 7 by the pressing force against the peripheral edge of the screw hole of the nut 7.
  • the final fastening nut 7 can prevent the loosening of the locking nut 6 by itself, and it is also easy to simply tighten the locking nut 6. It is possible to prevent the nut 7 for final tightening from being loosened by a simple operation.
  • the material of the material of the locking nut 6 is used as a means for plastically deforming the female thread portion 70 of the nut 7 for final fastening by the pressing force accompanying the tightening of the nut 6 for locking.
  • the hardness is higher than the hardness of the material of the nut 7 for final fastening.
  • FIG. 14 is a bottom view showing another example of the locking nut
  • FIG. 15 is an enlarged sectional view of the locking nut.
  • the lock nut 6 has three long protrusions 63 formed at the same interval along the periphery of the screw hole of one axial end surface (bottom surface) 62 of the nut body 6a. .
  • the other axial end surface (upper surface) may be formed as a flat surface, or a similar protrusion may be formed.
  • Each of the protrusions 63 is formed integrally with the nut body 6a at the periphery of the screw hole of the axial end face 62, and the side surface thereof is formed in a convex arc shape as shown in FIG.
  • the cross-sectional shape is square.
  • the number of the protrusions 63 is not limited to three in the embodiment, but may be one, or two, four, five or the like.
  • the side surface shape of the protrusion 63 can be formed in a square shape as in the first embodiment, and the cross-sectional shape thereof is as shown in FIG. 10, FIG. 11, FIG. 12, FIG. It can be formed in a triangular shape, chevron shape, semicircular shape, or arc shape at the tip as shown in Fig.
  • FIG. 16 is a bottom view showing another example of the locking nut
  • FIG. 17 is a cross-sectional view of the locking nut.
  • This locking nut 6 is provided on one axial end face of the nut body 6a.
  • annular protrusion 63 is formed on the body along the periphery of the screw hole 62.
  • the other axial end surface (upper surface) may be formed as a flat surface, or a similar protrusion may be formed.
  • each of the protrusions 63 can be formed in a rectangular shape as in the first embodiment, and as shown in FIGS. 10, 11, 12 and 13. It can be formed into a triangular shape, chevron shape, semicircular shape, or arc shape at the tip. Further, the tip surface of the projection 63 can be formed in a wavy shape, a tooth shape, a saw blade shape, or the like.
  • FIG. 18 is a bottom view showing the locking nut of the fourth embodiment
  • FIG. 19 is a sectional view of the locking nut.
  • the locking nut 6 has four hemispherical protrusions 63 integrally formed at the same interval along the periphery of the screw hole of one axial end surface (bottom surface) 62 of the nut body 6a. Have been.
  • the other axial end surface (upper surface) may be formed as a flat surface, or a similar protrusion may be formed.
  • the number of protrusions 63 is not limited to four in the embodiment, but may be one, or two, three, five, six, seven, eight, ten, etc. be able to. Industrial applicability
  • the area of the annular seating surface that comes into contact with the seating surface of the nut for final fastening is formed smaller than the area of the axial end surface.
  • the contact area between the two nuts is reduced to prevent the nuts for final tightening from rotating together with the tightening of the locking nuts, and tightening is performed by the reduced contact area. Increase the pressure and tighten both nuts securely. Can be.
  • the annular seating surface because of the annular seating surface, the pressing force accompanying the tightening of the locking nut can be evenly applied to the seating surface of the nut for final tightening. Even if it cuts into the seat surface of the gut, the annular projection does not collapse, and pressure can be reliably applied to the nut for final fastening.
  • the female screw portion of the final tightening nut can be plastically deformed by tightening the locking nut. It can have its own locking function.
  • the hardness of the material of the locking nut is higher than the hardness of the material of the nut for final fastening, the protrusions are not crushed, and the female screw portion of the nut for final fastening is securely formed. It can be plastically deformed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

L'invention concerne un écrou de blocage conçu pour éviter le relâchement d'un écrou principal grâce à la déformation plastique du filet interne de l'écrou principal, l'opération de serrage étant simplifiée et le relâchement de l'écrou principal pouvant être évité même si l'écrou de blocage se dévisse. L'invention concerne un écrou de blocage (1) apte à être serré depuis le dessus d'un écrou principal (2) fileté sur un filet externe (20) afin d'éviter le relâchement de l'écrou principal, l'écrou de blocage étant obtenu à partir d'une matière dont la dureté est supérieure à celle de la matière de l'écrou principal et ayant une saillie (30) formée autour du bord périphérique de l'orifice fileté pratiqué dans la surface d'extrémité axiale. La saillie étant plaquée au niveau de son extrémité avant contre le rebord périphérique de l'orifice fileté de l'écrou principal afin de déformer de manière plastique le filet interne de l'écrou principal.
PCT/JP2003/001098 2002-02-04 2003-02-04 Ecrou de blocage WO2003067104A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003211911A AU2003211911A1 (en) 2002-02-04 2003-02-04 Locking nut

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2002-26615 2002-02-04
JP2002026615 2002-02-04
JP2002028142A JP2003227508A (ja) 2002-02-05 2002-02-05 ロック用ナット
JP2002-28142 2002-02-05
JP2002381628A JP2003294021A (ja) 2002-02-04 2002-12-27 ロック用ナット
JP2002-381628 2002-12-27

Publications (1)

Publication Number Publication Date
WO2003067104A1 true WO2003067104A1 (fr) 2003-08-14

Family

ID=27738889

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/001098 WO2003067104A1 (fr) 2002-02-04 2003-02-04 Ecrou de blocage

Country Status (2)

Country Link
AU (1) AU2003211911A1 (fr)
WO (1) WO2003067104A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109869403A (zh) * 2019-03-14 2019-06-11 尹苑苑 一种防松螺母顶推预紧系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5266865U (fr) * 1975-11-14 1977-05-18
JPS61164811U (fr) * 1986-03-29 1986-10-13
EP0220165A2 (fr) * 1985-10-21 1987-04-29 Bombardier-Rotax-Wien Produktions- und Vertriebsgesellschaft m.b.H. Méthode pour l'assurage d'un boulon, spécialement d'un goujon, dans un trou taraudé d'une pièce, boulon et outil pour la mise en oeuvre de cette méthode
WO1998009086A1 (fr) * 1996-08-26 1998-03-05 Hideo Moroi Contre-ecrou

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5266865U (fr) * 1975-11-14 1977-05-18
EP0220165A2 (fr) * 1985-10-21 1987-04-29 Bombardier-Rotax-Wien Produktions- und Vertriebsgesellschaft m.b.H. Méthode pour l'assurage d'un boulon, spécialement d'un goujon, dans un trou taraudé d'une pièce, boulon et outil pour la mise en oeuvre de cette méthode
JPS61164811U (fr) * 1986-03-29 1986-10-13
WO1998009086A1 (fr) * 1996-08-26 1998-03-05 Hideo Moroi Contre-ecrou

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109869403A (zh) * 2019-03-14 2019-06-11 尹苑苑 一种防松螺母顶推预紧系统

Also Published As

Publication number Publication date
AU2003211911A1 (en) 2003-09-02

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