WO1989006756A1 - Dispositif de blocage - Google Patents

Dispositif de blocage

Info

Publication number
WO1989006756A1
WO1989006756A1 PCT/GB1989/000034 GB8900034W WO8906756A1 WO 1989006756 A1 WO1989006756 A1 WO 1989006756A1 GB 8900034 W GB8900034 W GB 8900034W WO 8906756 A1 WO8906756 A1 WO 8906756A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
locking device
members
cylindrical surface
insert
Prior art date
Application number
PCT/GB1989/000034
Other languages
English (en)
Inventor
Richard Arthur Lindsay
Original Assignee
Vinten Broadcast Limited
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
Application filed by Vinten Broadcast Limited filed Critical Vinten Broadcast Limited
Publication of WO1989006756A1 publication Critical patent/WO1989006756A1/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
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
    • F16B7/182—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements for coaxial connections of two rods or tubes
    • 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

Definitions

  • This invention relates to a locking device for screw threaded members, and more particularly, though not exclusively, to locking means for threadedly jointed bars or tubes of substantially circular cross-section.
  • the present locking device is not exclusively applicable to circular cross sections, it is to be understood that the locking improves the larger the number of facets in the cross-section of at least one of the members.
  • one end of each piece of bar may be drilled and tapped longitudinally to accept a threaded insert, such as studding, so that the two ends may be jointed by the insert; or a male thread may be formed on one end of one of the pieces of bar and a female on one end of the other piece of bar, if the finished overall length is not critical.
  • a threaded insert such as studding
  • Another method is to "sleeve" the end of one piece of bar, retaining the sleeve to the bar with a screw, rivet or pin fitted through the sleeve and into the bar, and then inserting an end of the other bar in the other end of the sleeve, where it is retained using a screw, pip-pin, or nut and bolt fitted through the sleeve and the other bar.
  • Specially manufactured clamps with flanges which can be bolted together are also used for joining two bars or tubes at their ends.
  • a locking device for retaining together two inter-engaging screw threaded members, comprising a coiled spring mounted on one of the members, the spring having inner and outer surfaces, a substantially cylindrical surface formed on the other member for engagement with one of said inner and outer surfaces, the spring being so coiled that upon screwing the members together the coils slip over the cylindrical surface and upon attempted unsolicited unscrewing of the members the coils tighten on the cylindrical surface to retain the members together, and rotation means engageable with an end of the coil spring to rotate said end in a direction to free the spring from the cylindrical surface to permit unscrewing of the memoers
  • a first bar or tubular member 1 has an annular section 2 into which is fitted a locking device means, generally shown at 3.
  • the device 3 comprises an insert 4 with an internal screw thread 4a.
  • a coil spring 5 of suitable diameter has its left end 5a anchored to the insert 4 and its right end 5b anchored to an external sleeve 6.
  • the sleeve 6 is of sufficient length to overlap both the spring 5 and a portion of the tubular member 1.
  • a shoulder 7 is formed on its inner wall, and the shoulder 7 is trapped between the spring's left end 5a and the right-hand end of the member 1, adjacent to which a snap ring 8, engages the insert 4 to stop the insert being pushed too far into the member 1.
  • the insert 4 is a push fit in the member 1 and is then retained therein with Loctite (R.T.M) or a similar locking compound. It may equally well be retained by any other known means such as grub screws, rivets or pins.
  • a stop-pin 9 is mounted on the insert 4 to operate in an arcuate slot 6a formed in the shoulder 7 of the sleeve 6.
  • a corresponding male threaded section 10 of a second bar member 11 engages with the screw thread 4a of insert 4.
  • the member 11 also has an external cylindrical surface 12 of slightly greater diameter than the inner diameter of coil spring 5.
  • the external surface 12 of the member 11 slightly opens the coils of the spring 5 and slips under the coils.
  • the unscrewing movement of the surface 12 drags and tightens the coils of the appropriately handed spring 5 to further clamp end grip upon the surface 12.
  • the external sleeve 6 In order to unscrew the two members from each other the external sleeve 6 must first be turned in such a direction relative to the first member 1 so as to open up the coils of the spring 5, thereby freeing the second member 11 for unscrewing.
  • the spring may equally well be arranged so that the outside diameter of the spring vice-versa engages an internal cylindrical surface of one of the members.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

Dispositif de blocage servant à retenir bout à bout deux élément filetés (1, 11). L'un des éléments porte un ressort spiralé (5) et un manchon (6) permettant l'ouverture des spires du ressort, qui normalement se plaque sur une surface cylindrique (12) du second élément lors de l'assemblage. On dévisse les deux éléments en faisant tourner le manchon (6) afin de libérer les spires du ressort de la surface (12).
PCT/GB1989/000034 1988-01-19 1989-01-13 Dispositif de blocage WO1989006756A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888801139A GB8801139D0 (en) 1988-01-19 1988-01-19 Improvements in/relating to jointing locks for members of substantially circular cross section
GB8801139 1988-01-19

Publications (1)

Publication Number Publication Date
WO1989006756A1 true WO1989006756A1 (fr) 1989-07-27

Family

ID=10630201

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/000034 WO1989006756A1 (fr) 1988-01-19 1989-01-13 Dispositif de blocage

Country Status (3)

Country Link
AU (1) AU3037789A (fr)
GB (1) GB8801139D0 (fr)
WO (1) WO1989006756A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1553310A1 (fr) * 2004-01-12 2005-07-13 Sarma Dispositif de verrouillage réversible sur une structure d'un embout à positionnement ajustable
CN106337859A (zh) * 2016-11-08 2017-01-18 天津七二通信广播股份有限公司 一种弹簧棘轮防松锁紧机构及使用方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1119159A (fr) * 1952-06-26 1956-06-15 Joints d'indesserrabilité et de calage pour accouplements filetés
GB2053403A (en) * 1979-07-13 1981-02-04 Nissan Motor Self-locking device for example a nut
WO1988006244A1 (fr) * 1987-02-17 1988-08-25 Hume, Catherine, Gillies Mecanisme d'emboitement reciproque pour elements telescopiques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1119159A (fr) * 1952-06-26 1956-06-15 Joints d'indesserrabilité et de calage pour accouplements filetés
GB2053403A (en) * 1979-07-13 1981-02-04 Nissan Motor Self-locking device for example a nut
WO1988006244A1 (fr) * 1987-02-17 1988-08-25 Hume, Catherine, Gillies Mecanisme d'emboitement reciproque pour elements telescopiques

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1553310A1 (fr) * 2004-01-12 2005-07-13 Sarma Dispositif de verrouillage réversible sur une structure d'un embout à positionnement ajustable
FR2865007A1 (fr) * 2004-01-12 2005-07-15 Sarma Dispositif de verrouillage reversible sur une structure d'un embout a positionnement ajustable
CN106337859A (zh) * 2016-11-08 2017-01-18 天津七二通信广播股份有限公司 一种弹簧棘轮防松锁紧机构及使用方法

Also Published As

Publication number Publication date
AU3037789A (en) 1989-08-11
GB8801139D0 (en) 1988-02-17

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