EP2412986A1 - Actionneur hydraulique - Google Patents

Actionneur hydraulique Download PDF

Info

Publication number: EP2412986A1
Authority: EP; European Patent Office
Prior art keywords: flange; fact; wheel; hydraulic; cylinder
Prior art date: 2010-07-28
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

EP11006120A

Other languages

German (de)

English (en)

Other versions

EP2412986B1 (fr

Inventor

Stefano Bonamin

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.)

Step Technology Srl

Original Assignee

STEP di Bonami Stefano

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.)

2010-07-28

Filing date

2011-07-26

Publication date

2012-02-01

2011-07-26 Application filed by STEP di Bonami Stefano filed Critical STEP di Bonami Stefano

2012-02-01 Publication of EP2412986A1 publication Critical patent/EP2412986A1/fr

2014-10-15 Application granted granted Critical

2014-10-15 Publication of EP2412986B1 publication Critical patent/EP2412986B1/fr

Status Not-in-force legal-status Critical Current

2031-07-26 Anticipated expiration legal-status Critical

Images

Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
- F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
- F15B15/061—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement by unidirectional means

Definitions

the object of the invention concerns a compact hydraulic fifth wheel.
the fifth wheel system where rotation takes place using a worm screw that engages involute gear teeth on the outer ring of the fifth wheel also has serious drawbacks, even if it is the system that takes up the least space.
this system is very sensitive to output torque because the inevitable play, which occurs between the outer casing where the worm screw is fixed connected to the motor and the central body where the involute teeth are located, causes dangerous and harmful stresses that initially damage the bottom of the thrust bearings of the worm screw, and when the play increases the involute profile of the screw itself is damaged;
another drawback is that it has a fixing system that uses very long screws that cannot easily be found, thereby considerably increasing installation costs, and to this is added to the fact that this system is much more expensive than the previous ones.
the purpose of this invention is to have a hydraulic fifth wheel that is more compact than those currently on the market, less complex, more easily assembled and disassembled, providing easy maintenance and which, something that is extremely important, is less expensive than present ones, both in terms of construction as well as maintenance.
the object of this invention is a hydraulic fifth wheel including, fixed solidly to a first flange, a tubular element (inside band) in a coaxial position with regard to a second tubular elements (outside band) fixed solidly to a second flange directly opposite, characterised by the fact that in between the two flanges and the internal band there is a turn cylinder, whose body is hinged onto the two above-mentioned flanges and whose spindle has devices at the end for joining to the two cams on the their flat internal surface, so that following the horizontal movement of the spindle of the turn cylinder you get a relative rotation between the two flanges.
the turn cylinder is a hydraulic piston, powered hydraulically using a pair of holes on the head and on the sleeve of the turn cylinder for supplying the liquid, preferably oil, for the flow and return.
this pair of holes is connected via tubing to another pair of holes on the internal surface of one of the two flanges, using two revolving couplings.
the two above-mentioned holes hydraulically communicate radially with the outside of the fifth wheel (respectively on the tubular element or on the flange) to which are fixed two flexible hoses for the flow and return of the pressurised oil coming from a hydraulic power unit located outside and controlled by a distributor.
the advantage of this configuration is that the fifth wheel can be moved, and in particular the hydraulic piston, without the moving parts being exposed to the outside elements, thereby reducing normal maintenance considerably, or it can even be used completely immersed in liquids since it is watertight.
the coupling devices on the end of the rod are fork-shaped, with a flat cross-section that carries two protruding spindles opposite one another, in an axial relationship and set at 90° with respect to the operating axle of the turn cylinder.
This linear movement of the turn cylinder imparts a rotary movement between the first flange and the second flange opposite it.
the hydraulic cylinder When constructing the hydraulic cylinder it is possible to use various expedients for making it as compact as possible and ensure that it can be housed inside the fifth wheel, like for example using gaskets and guiding rings for reducing the size of their housing to a minimum, or to shaping the bottom joined to the cylinder sleeve in order to further reduce the dimensions. For the same reason also the inner part of the inner band roller sliding was shaped so as to have as little space as possible between the bottom of the cylinder and the inner surface of the band.
the hydraulic fifth wheel 30 is composed of a flange 4 is fixed solidly to an internal band 9 using screws 3; there is a second opposite flange 13 that is fixed solidly to the outer band 11 by means of screws 21.
These two series of vertical rollers 10 have a dual purpose; the first purpose consists of keeping radially centred and transmitting the radial load between the inner band 9 and the outer band 11, thereby providing relative rotation between them; a second purpose consists of axially locking the inner band 9 and the outer band 11 so as to prevent an opening of the fifth wheel 30 that is subjected to a negative axial load (see detail X in figs. 32 and 36 ).
the two holes (26, 27) with tapered threading on the inner surface of the first flange 4 are connected respectively to two holes with tapered threading positioned radially to the flange itself to which are fixed two flexible hydraulic tubes for the flow-return of the pressurised oil coming from a hydraulic power unit located outside and controlled by a distributor.
a fork arm 33 On the end of the spindle 32 has been fixed a fork arm 33, with a flat cross-section that carries two protruding shafts 49 opposite one another, in an axial relationship with one another and set at 90° with respect to the operating axle of the turn cylinder 8.
These two protruding shafts 49 opposite to each other carry two runner wheels 17 to which are joined two bushes with lubrication pockets 15 (sliding bearings) to provide rotation around their shafts with minimal friction.
the cylindrical surface of the two wheels 17 are in contact, respectively, with the surface of a first cam 28 in the first flange 4, and with the surface of a second cam 29 in the opposite flange 13.
the thrust exercised by the turn cylinder 8 is transmitted to the first flange 4 and to the second flange 13 by spindles 48 positioned on the head 35 and housed in a concentric way in the two flanges 4 and 13 and the two wheels 17 that act respectively on the two profiles of the cams 28 and 29 on the inner part of the two flanges 4 and 13 in question.
This linear movement of the turn cylinder 8 imparts a rotary movement between the first flange 4 and the second flange 13 opposite it.
the outer shape of the fork 33 was specially designed to reduce the size to a minimum, for this reason an alloy steel is used in order to make up for the reduction of the resistant section and to have sufficient resistance to the mechanical stress to which it is subjected.
cylinder sleeve 31 cylinder rod 32; fork 33; piston 34; head 35; fork guide 36; O-ring 37; guide ring 38; O- ring 39; anti-extrusion ring 40; guide ring 41; rod wiper 42; Balsele 43; Balmaster 44; dowel pins 45; fork guide 46 assembly screws; fork fastening screws 47; spindles positioned on the head 48; offset spindles on the fork 49.

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Fluid Mechanics (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Actuator (AREA)
Braking Arrangements (AREA)
Pressure Welding/Diffusion-Bonding (AREA)

EP20110006120 2010-07-28 2011-07-26 Actionneur hydraulique Not-in-force EP2412986B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
ITPD2010A000240A IT1401183B1 (it)	2010-07-28	2010-07-28	Ralla idraulica compatta

Publications (2)

Publication Number	Publication Date
EP2412986A1 true EP2412986A1 (fr)	2012-02-01
EP2412986B1 EP2412986B1 (fr)	2014-10-15

Family

ID=43734180

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20110006120 Not-in-force EP2412986B1 (fr)	2010-07-28	2011-07-26	Actionneur hydraulique

Country Status (2)

Country	Link
EP (1)	EP2412986B1 (fr)
IT (1)	IT1401183B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN111168429A (zh) *	2019-12-24	2020-05-19	中信戴卡股份有限公司	一种用于车轮加工的定位装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1229437A (fr) *	1959-07-07	1960-09-07	Mahdrescherwerk Weimar Veb	Dispositif de commande de rotation, en particulier pour grues
US5106052A (en) *	1991-05-09	1992-04-21	Dipti Datta	Air damper apparatus
DE4134220A1 (de) *	1990-10-29	1992-04-30	Volkswagen Ag	Vorrichtung zur justierung der relativen winkellage von zwei rotierenden, konzentrischen maschinenteilen

2010
- 2010-07-28 IT ITPD2010A000240A patent/IT1401183B1/it active
2011
- 2011-07-26 EP EP20110006120 patent/EP2412986B1/fr not_active Not-in-force

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1229437A (fr) *	1959-07-07	1960-09-07	Mahdrescherwerk Weimar Veb	Dispositif de commande de rotation, en particulier pour grues
DE4134220A1 (de) *	1990-10-29	1992-04-30	Volkswagen Ag	Vorrichtung zur justierung der relativen winkellage von zwei rotierenden, konzentrischen maschinenteilen
US5106052A (en) *	1991-05-09	1992-04-21	Dipti Datta	Air damper apparatus

Also Published As

Publication number	Publication date
EP2412986B1 (fr)	2014-10-15
IT1401183B1 (it)	2013-07-12
ITPD20100240A1 (it)	2012-01-29

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