WO1996001379A1 - Dispositif de raccordement a filetage autobloquant - Google Patents

Dispositif de raccordement a filetage autobloquant Download PDF

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Publication number
WO1996001379A1
WO1996001379A1 PCT/US1995/005820 US9505820W WO9601379A1 WO 1996001379 A1 WO1996001379 A1 WO 1996001379A1 US 9505820 W US9505820 W US 9505820W WO 9601379 A1 WO9601379 A1 WO 9601379A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
projections
fastening device
threaded
meshing
Prior art date
Application number
PCT/US1995/005820
Other languages
English (en)
Inventor
Richard W. Vanderdrift
Original Assignee
Vanderdrift Richard W
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 US08/372,318 external-priority patent/US5538378A/en
Application filed by Vanderdrift Richard W filed Critical Vanderdrift Richard W
Priority to MX9700216A priority Critical patent/MX9700216A/es
Priority to EP95919779A priority patent/EP0769108A4/fr
Priority to JP8503863A priority patent/JPH10502435A/ja
Priority to BR9508203A priority patent/BR9508203A/pt
Priority to AU25462/95A priority patent/AU689897B2/en
Publication of WO1996001379A1 publication Critical patent/WO1996001379A1/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
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/32—Locking by means of a pawl or pawl-like tongue

Definitions

  • the present invention relates to self-locking threads and threaded connections
  • fasteners function in this regard by increasing friction between the otherwise mated threads of the male and female components or between the fastener and the parts joined by the fastener.
  • Examples include: lock washers, tooth washers, blind thread bores filled with resilient inserts such as disclosed in U.S. Pat. No. 5,078,562 issued to DeHaitre on January 7, 1992, and screw thread profiles that jam or deform when tightened such as disclosed in U.S. Pat. No. 5,242,252 issued to Harle on September 7, 1993.
  • Other such fasteners and connections function by increasing the friction between the engaging surfaces of the head of the male component and work piece, or between the female component and work piece such as disclosed in U.S.
  • fasteners using these approaches generally require high or
  • threads, threaded fasteners, and threaded devices (i) that will not come loose under loads equal or less than the fastener supports, (ii) that can be easily installed using conventional tools, (iii) that employ torque values appreciably closer to those torque values only necessary to clamp together the workpieces (as opposed to requiring higher torque values to provide increased resistance against loosening), and (iv)
  • the present invention addresses these drawbacks in known prior threaded fasteners and threaded devices and meets these needs
  • Figure 1A is a side view of the invention in an assembled state.
  • Figure IB is a bottom view of the invention in an assembled state showing the flexible thread projections of the female component interacting with the thread recesses of
  • Figure 2 A is a side view of adjacent thread rotations of the invention in an
  • Figure 2B is a side view of adjacent rotations of the invention in an assembled state increased in size to show details of one flexible thread projection of the female component meshed with a recess of the male component.
  • Figure 3 A is a top view of the female fastening component's flexible thread according to a preferred embodiment of the present invention.
  • Figure 3B is a side view of the female fastening component's flexible thread according to a preferred embodiment of the present invention.
  • Figure 3C is a bottom view of the female fastening component with its flexible thread according to a preferred embodiment of the present invention.
  • Figure 3D is a half cut away side view of the female fastening component with its
  • Figure 4 A is a side view of adjacent rotations of an alternative embodiment of the
  • Figure 4B is a side view of adjacent rotations of an alternative embodiment of the present invention in an assembled and unlocked state as applied to male and female fastening components where the projections of the flexible thread segment press axially against the recesses of the male thread..
  • Figure 1A shows a side view of a self-locking threaded connection, in an assembled
  • the projection locking thread is either attached to the female
  • projections are formed in a manner that enables them to flex axially or radially.
  • the female component is typically a threaded nut, bore, or hole.
  • the male component is typically a threaded bolt, cylinder, stud, shank or screw.
  • the projection locking thread and the recess locking thread are designed to work together so that, as the male component is being screwed into or out of the female component, the two threads engage each other in a novel manner (hereafter referred to as "meshing") and thereby lock.
  • meshing novel manner
  • Figure IB shows an end view of the self-locking threaded connection of Figure 1A
  • Figures 2A is a side view of one projection of the flexible thread segment in an unlocked state.
  • Figure 2B the projection appearing in Figure 2A is shown in greater
  • the axial tensile stress must also lift or force the flexible thread segment's projections out of the male thread's recesses and to overcome any remaining friction.
  • the loosening torque resulting from tensile stress must be great enough to overcome the natural spring return action pushing the flexible thread segment's projections into the male thread's projections. To ensure that the loosening torque is less than these
  • the faces of the recesses and projections can be formed so that the projections dig into the recesses when torque is applied in either the tightening or loosening directions.
  • the fasteners cannot be either further tightened or loosened once meshing occurs without damaging the projection or the recess.
  • the female component is used with a traditional bolt or other male component without recesses, the flexible thread segment presses up against the males thread creating additional resistance to loosening.
  • the additional resistance prevents inadvertent loosening in the same manner as prevailing torque nuts such as those with nylon inserts.
  • Figure 3A is a bottom view and Figure 3B is a side view of the female component's
  • the female's flexible thread segment is not solid from its root to its crest for its full length.
  • the flexible thread segment can be attached to the female component (12) in any
  • Figure 4 A is a side view of adjacent rotations of an alternative embodiment of the
  • the recesses (32) are located at the root and
  • Figure 4B is a side view of adjacent rotations of an alternative embodiment of the present invention in an assembled and unlocked state where the projections of the internal flexible thread segment press axially against the recesses of the male thread.
  • the recesses (32) and the projections are on the following flanks.
  • projections on the external thread can be used to mesh with the projections of the flexible thread segment.
  • the flexible thread segment can be more or less than one full rotation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Dowels (AREA)
  • Handcart (AREA)
  • Earth Drilling (AREA)
  • Clamps And Clips (AREA)

Abstract

La présente invention concerne un dispositif de raccordement à filetage autobloquant comprenant un élément mâle (11) présentant un filetage bloquant du type à évidements (31) et un élément femelle (12) dont un segment présente du filetage flexible (21). La tension provoquée par le redressement du segment à filetage femelle flexible force les saillants (22) du segment à filetage flexible à pénétrer dans les évidements (32) du filetage bloquant par évidements, ce qui empêche l'écrou fileté de se desserrer et de se dégager à la suite d'une pression axiale se combinant éventuellement à des mouvements de vibration, de dilatation, de contraction ou autres. Les formes des saillants (22) et des évidements (32) sont conçues pour que leurs surfaces glissent l'une sur l'autre dès qu'on applique un couple adéquat. Les deux filetages sont conçus pour coopérer. L'élément femelle (12), lorsqu'il est utilisé avec un élément mâle standard (11) sans évidements (32), présente une résistance au desserrement accidentel.
PCT/US1995/005820 1994-07-01 1995-05-05 Dispositif de raccordement a filetage autobloquant WO1996001379A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
MX9700216A MX9700216A (es) 1995-01-13 1995-05-05 Dispositivo de conexion roscado auto-trabable.
EP95919779A EP0769108A4 (fr) 1994-07-01 1995-05-05 Dispositif de raccordement a filetage autobloquant
JP8503863A JPH10502435A (ja) 1994-07-01 1995-05-05 セルフロックねじ山付連結具
BR9508203A BR9508203A (pt) 1994-07-01 1995-05-05 Dispositivo de conexão rosqueado de travamento automático
AU25462/95A AU689897B2 (en) 1994-07-01 1995-05-05 Self-locking threaded connecting device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US26953594A 1994-07-01 1994-07-01
US08/269,535 1994-07-01
US08/372,318 1995-01-13
US08/372,318 US5538378A (en) 1995-01-13 1995-01-13 Self-locking threaded connecting device

Publications (1)

Publication Number Publication Date
WO1996001379A1 true WO1996001379A1 (fr) 1996-01-18

Family

ID=26953758

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/005820 WO1996001379A1 (fr) 1994-07-01 1995-05-05 Dispositif de raccordement a filetage autobloquant

Country Status (7)

Country Link
EP (1) EP0769108A4 (fr)
JP (1) JPH10502435A (fr)
AU (1) AU689897B2 (fr)
BR (1) BR9508203A (fr)
CA (1) CA2194164A1 (fr)
TW (1) TW268081B (fr)
WO (1) WO1996001379A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750178A1 (fr) * 1996-06-24 1997-12-26 Schneider Electric Sa Procede d'assemblage de toles metalliques
EP1471269A2 (fr) * 2003-04-23 2004-10-27 Simmonds Dispositif de verrouillage d'un écrou à un axe fileté pour assembler par serrage de l'écrou une pièce à une autre pièce solidaire de cet axe
FR2888900A1 (fr) * 2005-07-21 2007-01-26 Snecma Dispositif de freinage en rotation de deux elements visses l'un dans l'autre
US8382415B1 (en) 2006-09-05 2013-02-26 Harold Goldbaum Rapid-engaging and positive-locking threaded configuration

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6442778B2 (ja) * 2014-09-08 2018-12-26 株式会社ＮｅｊｉＬａｗ ピストン部材、ピストン締結構造
JP2017067252A (ja) * 2015-10-02 2017-04-06 濱中ナット株式会社 ボルト・ナットの弛み止め構造

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1289867A (en) * 1918-03-16 1918-12-31 William J P Moore Cotter-pin.
US1593088A (en) * 1926-06-03 1926-07-20 Lowe Mak Sing Nut lock
US2372884A (en) * 1943-09-25 1945-04-03 James A Davis Lock nut
US2534035A (en) * 1947-04-30 1950-12-12 Lachatre Louis Spring nut lock
US4168731A (en) * 1977-10-06 1979-09-25 Taber Benjamin C Locking nut and bolt assembly

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2521257A (en) * 1946-07-11 1950-09-05 Lillian M Sample Self-locking nut for notched bolts
US4653968A (en) * 1980-08-25 1987-03-31 Illinois Tool Works, Inc. Adjustable abutment assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1289867A (en) * 1918-03-16 1918-12-31 William J P Moore Cotter-pin.
US1593088A (en) * 1926-06-03 1926-07-20 Lowe Mak Sing Nut lock
US2372884A (en) * 1943-09-25 1945-04-03 James A Davis Lock nut
US2534035A (en) * 1947-04-30 1950-12-12 Lachatre Louis Spring nut lock
US4168731A (en) * 1977-10-06 1979-09-25 Taber Benjamin C Locking nut and bolt assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0769108A4 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750178A1 (fr) * 1996-06-24 1997-12-26 Schneider Electric Sa Procede d'assemblage de toles metalliques
EP0816693A1 (fr) * 1996-06-24 1998-01-07 Schneider Electric Sa Procédé d'assemblage de tÔles métalliques
EP1471269A2 (fr) * 2003-04-23 2004-10-27 Simmonds Dispositif de verrouillage d'un écrou à un axe fileté pour assembler par serrage de l'écrou une pièce à une autre pièce solidaire de cet axe
FR2854213A1 (fr) * 2003-04-23 2004-10-29 Simmonds Sa Dispositif de verrouillage d'un ecrou a un axe filete pour assembler par serrage de l'ecrou une piece a une piece solidaire de cet axe
EP1471269A3 (fr) * 2003-04-23 2004-12-29 Simmonds Dispositif de verrouillage d'un écrou à un axe fileté pour assembler par serrage de l'écrou une pièce à une autre pièce solidaire de cet axe
FR2888900A1 (fr) * 2005-07-21 2007-01-26 Snecma Dispositif de freinage en rotation de deux elements visses l'un dans l'autre
US8382415B1 (en) 2006-09-05 2013-02-26 Harold Goldbaum Rapid-engaging and positive-locking threaded configuration

Also Published As

Publication number Publication date
JPH10502435A (ja) 1998-03-03
EP0769108A4 (fr) 1998-01-14
AU689897B2 (en) 1998-04-09
CA2194164A1 (fr) 1996-01-18
AU2546295A (en) 1996-01-25
BR9508203A (pt) 1997-12-23
EP0769108A1 (fr) 1997-04-23
TW268081B (fr) 1996-01-11

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