EP3236143A1 - Gelenkstruktur - Google Patents

Gelenkstruktur Download PDF

Info

Publication number: EP3236143A1
Authority: EP; European Patent Office
Prior art keywords: articulated structure; elements; rotation; friction; structure according
Prior art date: 2016-04-20
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.): Granted

Application number

EP17165928.7A

Other languages

English (en)

French (fr)

Other versions

EP3236143B1 (de

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.)

2016-04-20

Filing date

2017-04-11

Publication date

2017-10-25

2017-04-11 Application filed by Viabizzuno SRL filed Critical Viabizzuno SRL

2017-10-25 Publication of EP3236143A1 publication Critical patent/EP3236143A1/de

2019-03-13 Application granted granted Critical

2019-03-13 Publication of EP3236143B1 publication Critical patent/EP3236143B1/de

Status Not-in-force legal-status Critical Current

2037-04-11 Anticipated expiration legal-status Critical

Links

Images

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.
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 first drawback consists in the fact that many of these supports have friction connections and joints for friction which must therefore be loosened before the adjustment and subsequently tightened once the desired configuration has been identified.
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 two smaller and larger annular walls 9, 10 both have the shape of a cylindrical ring without a portion with axial extension.
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.
annular wall 7 of the first friction member 5 is inserted between the two smaller and larger annular concentric walls 9, 10 of the second member 6, in a concentric fashion.
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 is of the expansion type and comprises a male element 13 and a female element 14, both these male and female elements 13, 14 having respective heads 13a, 14a.
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 above-mentioned Belleville springs 15, 16 are interposed between a respective head 13a, 14a of the rivet 12 and the outer surfaces of the first and second elements 2 and 3.
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.
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.
the described succession of deformations therefore brings the surfaces in contact with the annular walls 7, 9, 10 to generate a mutual rubbing together, at a rotation of the elements 2, 3, which generates respective friction forces resulting from the above-mentioned rotation.
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.
the above-mentioned rivet 12, with its male and female elements 13, 14 and Belleville springs 15, 16 define, in their entirety for the articulated structure 1, respective means 18 for clamping in a pack, in the direction of the predetermined axis of rotation A, the first and second elements 2, 3 and the first and second friction members 5, 6 interposed between them.
the invention also relates to a method for assembling an articulated structure and comprises a plurality of steps.
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.
This invention achieves the preset aims and brings important advantages.
the articulated structure 1 according to the invention is exceptionally compact at the pivot and the friction members have a limited size.
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)

EP17165928.7A 2016-04-20 2017-04-11 Gelenkstruktur Not-in-force EP3236143B1 (de)

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 true EP3236143A1 (de)	2017-10-25
EP3236143B1 EP3236143B1 (de)	2019-03-13

Family

ID=56740315

Family Applications (1)

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

Country Status (2)

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

Citations (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
US20060096444A1 (en) *	2004-11-08	2006-05-11	Hoshino Gakki Mfg. Co., Ltd.	Angle adjustor

2016
- 2016-04-20 IT ITUA2016A002755A patent/ITUA20162755A1/it unknown
2017
- 2017-04-11 EP EP17165928.7A patent/EP3236143B1/de not_active Not-in-force

Patent Citations (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
US20060096444A1 (en) *	2004-11-08	2006-05-11	Hoshino Gakki Mfg. Co., Ltd.	Angle adjustor

Also Published As

Publication number	Publication date
EP3236143B1 (de)	2019-03-13
ITUA20162755A1 (it)	2017-10-20

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