EP3236143B1 - Structure articulée - Google Patents

Structure articulée Download PDF

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Publication number
EP3236143B1
EP3236143B1 EP17165928.7A EP17165928A EP3236143B1 EP 3236143 B1 EP3236143 B1 EP 3236143B1 EP 17165928 A EP17165928 A EP 17165928A EP 3236143 B1 EP3236143 B1 EP 3236143B1
Authority
EP
European Patent Office
Prior art keywords
elements
articulated structure
rotation
friction
friction member
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP17165928.7A
Other languages
German (de)
English (en)
Other versions
EP3236143A1 (fr
Inventor
Mario Nanni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viabizzuno SRL
Original Assignee
Viabizzuno SRL
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 Viabizzuno SRL filed Critical Viabizzuno SRL
Publication of EP3236143A1 publication Critical patent/EP3236143A1/fr
Application granted granted Critical
Publication of EP3236143B1 publication Critical patent/EP3236143B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/26—Pivoted arms

Definitions

  • This invention relates to an articulated structure according to claim 1 and a method of assembling an articulated structure according to claim 12.
  • this invention relates to an articulated structure equipped with a friction member.
  • this invention relates to an articulated structure equipped with a friction member and integrated in lighting structures, such as spotlights and lighting projectors.
  • the spotlights are usually inserted in rectilinear guides which simplify both the positioning that the powering. Once positioned, the spotlights must then be oriented to direct the light beam in the desired direction.
  • the spotlights are usually connected to the guide by supports, such as arms or articulated arms.
  • the supports although they provide a certain versatility in the orientation of the spotlights, are not free from drawbacks.
  • a further drawback connected to the use of the supports of known type is due to the fact that sometimes the spotlight is not easily accessible, thereby making the above-mentioned loosening and tightening operations even more difficult..
  • the aim of this invention is to provide an articulated model which is able to overcome the drawbacks of the prior art and which is at the same time practical to use and simple to make.
  • a further aim of this invention is to provide an articulated structure which is easy to adjust and which is stable in its configuration.
  • a further aim of this invention is to provide an articulated structure which is inexpensive to make.
  • Another aim of the invention is to provide a method for assembling an articulated structure which is simple and practical to implement.
  • the numeral 1 denotes in its entirety an articulated structure made in accordance with this invention.
  • the articulated structure 1 according to the invention is advantageously used to support lighting devices, not illustrated, such as spotlights and the like.
  • the articulated structure 1 comprises a first element 2 with an elongate shape and a second element 3 also with an elongate shape.
  • the first and second elements 2, 3 are advantageously made of sheet metal.
  • the elements 2, 3 are made by casting, in configurations which are also not flat.
  • first and second elements 2, 3 are equal and interchangeable.
  • the elements 2, 3 have different lengths.
  • first element 2 and second element 3 are pivoted to each other by a pin 4, shown in Figure 4 .
  • the pivot pin 4 makes the first and second elements 2, 3 movable relative to each other in a tilting fashion about a predetermined axis of rotation A, coinciding with a central axis of the pin 4.
  • the two first and second elements 2, 3 have respective circular through holes 20, 30 designed to allow the insertion of the pin 4.
  • the articulated structure 1 comprises, operatively positioned between the two first and second elements 2, 3, a first friction member 5 with a circular extension and a second friction member 6 with a circular extension.
  • the first friction member 5 comprises an annular C-shaped wall 7.
  • the annular wall 7 has the form of a cylindrical ring without an axial extension portion.
  • the first friction member 5 also comprises a tab 8 protruding in an axial direction from the annular wall 7 and integral with the latter.
  • the tab 8 as clearly shown in Figures 2 and 3 , is configured to be inserted in the respective cavity 21 which is exactly shaped to match, for making the first friction member 5 integral with the first element 2 relative to the rotation of the latter about the axis A.
  • the second friction member 6 comprises two concentric annular walls 9, 10, respectively smaller and larger, both C-shaped.
  • the second friction member 6 also comprises a tab 11 protruding in an axial direction from the annular walls 9, 10 and integral with them.
  • the tab 11 rigidly connects the two smaller and larger annular walls 9, 10, guaranteeing also their concentricity.
  • the tab 11 is configured to be inserted in the respective cavity 31 which is exactly shaped to match, for making the section friction member 6 integral with the second element 3 relative to the rotation of the latter about the axis A.
  • first and second friction members 5, 6 interpenetrate with each other in the direction of the predetermined axis of rotation A.
  • cylindrical surfaces is used to mean the approximately cylindrical inner and outer faces (apart from, that is, the missing portion) of the annular walls 7, 9, 10 of the friction members 5, 6.
  • the rivet 12 defines, with its elements 13, 14, the above-mentioned pivot pin 4.
  • the two first and second friction members 5, 6 interpenetrate with each other in such a way that their axial dimension reduces to that of only one of the two, after which the respective tabs 8, 11 are inserted in respective cavities 21, 31 of the first and second elements 2, 3, located with the holes 20, 30 coaxial with each other and the annular walls 7, 9, 10.
  • Two Belleville springs 15, 16 are positioned outside the first and second elements 2, 3, coaxial with the holes 20, 30.
  • the Belleville springs 15, 16 usefully perform the purpose of eliminating any possible axial clearances in the assembly of the articulated structure 1.
  • the female element 14 is positioned with a relative outer cylindrical surface facing an inner cylindrical surface of the smaller annular wall 9 of the second friction member 6.
  • the tightening in a pack by the rivet 12 is advantageously actuated by a compression of the two elements 13, 14 in the direction of the axis of rotation A, as indicated by the arrows F in Figure 2 ; this compression is achieved with a suitable press not illustrated.
  • This compression on the basis of the operating principle of the rivet 12, determines a radial expansion of the rivet 12, the expansion of which is transmitted to the adjacent smaller annular wall 9.
  • the smaller annular wall 9 acts like a spring, deforming elastically when opening and transmitting in turn the deformation to the adjacent annular wall 7 of the first friction member 5.
  • the annular wall 7 of the first friction member 5 deforms elastically and transmits the relative deformation to the larger annular wall 10 which in turn will undergo any elastic deformation.
  • first and second friction members 5, 6 thus define, for the articulated structure 1, respective friction means 17 which are operatively positioned between the first and second elements 2, 3 to obstruct the reciprocal rotation.
  • a first step consists in preparing a first element 2 and a second element 3 with an elongate shape which are pivoted to each other by means of a pin 4, to make the first and the second elements 2, 3 movable relative to each other in tilting fashion around a predetermined axis of rotation A.
  • a subsequent step comprises preparing a first friction member 5 with a circular extension, which is integral in rotation with one of the above-mentioned first and second elements 2, 3, and a second friction member 6 with a circular extension, which is integral in rotation with the other of the above-mentioned first and second elements 2, 3, with the first and second friction members 5, 6 interpenetrating with each other in the direction of the predetermined axis of rotation A.
  • the method according to the invention therefore requires positioning an expansion rivet 12, passing centrally inside the first and second friction members 5, 6, and pressing the expansion rivet 12 to close the articulated structure 1 tightly in a pack and to radially force the friction members 5, 6 so as to increase the friction force generated on respective surfaces in mutual contact.
  • the friction members 5, 6 are made by casting, and are preferably made of zama.
  • the articulated structure 1 according to the invention is exceptionally compact at the pivot and the friction members have a limited size. Moreover, the articulated structure 1 does not require any adjustment in use of the friction force which is determined in advance also as a function of the diameter of the rivet which can also vary as a function of the load which the articulated structure 1 is designed to support.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Pivots And Pivotal Connections (AREA)

Claims (12)

  1. Structure articulée comprenant
    - un premier élément (2) et
    - un second élément (3), pouvant pivoter réciproquement au moyen d'une cheville (4) pour rendre les premier et second éléments (2, 3) mobiles respectivement de façon basculante autour d'un axe de rotation (A) prédéterminé,
    - des moyens de frottement (17) étant fonctionnellement positionnés entre les premier et second éléments (2, 3) pour empêcher leur rotation réciproque, les moyens de frottement (17) comprenant un premier organe de frottement (5) doté d'une extension circulaire étant solidaire en rotation de l'un des premier (2) et second (3) éléments, et un second organe de frottement (6) doté d'une extension circulaire étant solidaire en rotation avec l'autre des premier (2) et second (3) éléments, les premier et second organes de frottement (5, 6) étant au moins partiellement montés ensemble dans la direction de l'axe prédéterminé de rotation (A) et configurés pour avoir des parties cylindriques respectives en contact mutuel, caractérisée en ce que le premier organe de frottement (5) comprend une cloison annulaire (7) et le second organe de frottement (6) comprend deux cloisons annulaires (9, 10), respectivement petite et grande, étant concentriques réciproquement, la cloison annulaire (7) du premier organe (5) étant configurée pour être au moins en partie introduite entre les deux cloisons annulaires concentriques (9, 10) du second élément (6), de façon concentrique à celles-ci.
  2. Structure articulée selon la revendication 1, caractérisée en ce que les premier et second organes de frottement (5, 6) sont interposés entre les premier et second éléments (2, 3) dans la direction de l'axe prédéterminé de rotation (A).
  3. Structure articulée selon la revendication 1 ou 2, caractérisée en ce que les cloisons annulaires (7, 9, 10) des premier et second organes de frottement (5, 6) sont en forme de « C ».
  4. Structure articulée selon l'une quelconque des revendications de 1 à 3, caractérisée en ce que le premier organe de frottement (5) comprend une languette (8), dépassant dans une direction axiale de l'espace de la cloison annulaire (7), étant solidaire de celle-ci et se prolongeant radialement, la languette (8) étant configurée pour être introduite dans une cavité correspondante (21) relative réalisée dans le premier élément (2) pour rendre le premier organe de frottement (5) solidaire en rotation du premier élément (2).
  5. Structure articulée selon l'une quelconque des revendications précédente, caractérisée en ce que le second organe de frottement (6) comprend une languette (11), dépassant dans une direction axiale de l'espace des petite et grande cloisons annulaires (9, 10), étant reliée aux petite et grande cloisons annulaires (9, 10) et se prolongeant radialement, la languette (11) étant configurée pour être introduite dans une cavité correspondante (31) relative réalisée dans le second élément (3) pour rendre le second organe de frottement (6) solidaire en rotation du second élément (3).
  6. Structure articulée selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comprend des moyens (18) de fermeture des premier et second éléments (2, 3) et des premier et second organes de frottement (5, 6) interposés entre eux fermement dans un paquet, dans la direction de l'axe prédéterminé de rotation (A).
  7. Structure articulée selon la revendication 6 lorsqu'elle dépend de la revendication 3, caractérisée en ce que les moyens de fermeture (18) comprennent un rivet d'expansion (12) passant à travers l'intérieur de la petite cloison annulaire (9) du second organe de frottement (6) et est configuré pour forcer radialement la petite cloison annulaire (9).
  8. Structure articulée selon la revendication 7, caractérisée en ce que les moyens de fermeture (18) comprennent au moins un ressort Belleville (15, 16) interposé entre une tête (13a, 14a) du rivet (12) et un des premier et second éléments (2, 3).
  9. Structure articulé selon la revendication 7 ou 8, caractérisée en ce que le rivet (12) comprend un élément mâle (13) et un élément femelle (14), les éléments mâle et femelle (13, 14) comportant des têtes (13a, 14a) respectives.
  10. Structure articulée selon l'une quelconque des revendications de 7 à 9, caractérisée en ce que le rivet (12) définit le pivot (4) des premier et second éléments (2, 3).
  11. Structure articulée selon l'une quelconque des revendications précédentes, caractérisée en ce que les premier et second éléments (2, 3) ont une forme allongée.
  12. Procédé servant à assembler une structure articulée comprenant les étapes de :
    - préparer un premier élément (2) et un second élément (3), pouvant pivoter réciproquement au moyen d'une cheville (4) pour rendre les premier et second éléments (2, 3) mobiles respectivement de façon basculante autour d'un axe de rotation (A) prédéterminé,
    - préparer un premier organe de frottement (5) doté d'une extension circulaire étant solidaire en rotation de l'un des premier et second éléments (2, 3), et un second organe de frottement (6) doté d'une extension circulaire étant solidaire en rotation avec l'autre des premier et second éléments (2, 3), les premier et second organes de frottement (5, 6) étant au moins partiellement montés ensemble dans la direction de l'axe prédéterminé de rotation (A),
    - positionner un rivet d'expansion (12) passant centralement à travers l'intérieur des organes de frottement (5, 6) dotés d'une extension circulaire,
    - appuyer sur le rivet d'expansion (12) pour fermer la structure articulée fermement dans un paquet et pour forcer radialement les organes de frottement (5, 6) de manière à augmenter la force de frottement générée sur des surfaces respectives en contact mutuel.
EP17165928.7A 2016-04-20 2017-04-11 Structure articulée Not-in-force EP3236143B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUA2016A002755A ITUA20162755A1 (it) 2016-04-20 2016-04-20 Struttura articolata

Publications (2)

Publication Number Publication Date
EP3236143A1 EP3236143A1 (fr) 2017-10-25
EP3236143B1 true EP3236143B1 (fr) 2019-03-13

Family

ID=56740315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17165928.7A Not-in-force EP3236143B1 (fr) 2016-04-20 2017-04-11 Structure articulée

Country Status (2)

Country Link
EP (1) EP3236143B1 (fr)
IT (1) ITUA20162755A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE334417C (de) * 1919-09-02 1921-03-17 Helmholz & Pauli Reibungsgelenk fuer Kipplampen
DE1090759B (de) * 1958-01-25 1960-10-13 Egon Hillebrand Gelenkleuchte
JP4313329B2 (ja) * 2004-11-08 2009-08-12 星野楽器製造 株式会社 角度調節装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
ITUA20162755A1 (it) 2017-10-20
EP3236143A1 (fr) 2017-10-25

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