EP0692317A1 - Vorrichtung zur Erzeugung von Schwingungen, insbesondere für einen Pressentisch zum Formen von Gegenständen aus Beton - Google Patents

Vorrichtung zur Erzeugung von Schwingungen, insbesondere für einen Pressentisch zum Formen von Gegenständen aus Beton Download PDF

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Publication number
EP0692317A1
EP0692317A1 EP95420191A EP95420191A EP0692317A1 EP 0692317 A1 EP0692317 A1 EP 0692317A1 EP 95420191 A EP95420191 A EP 95420191A EP 95420191 A EP95420191 A EP 95420191A EP 0692317 A1 EP0692317 A1 EP 0692317A1
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EP
European Patent Office
Prior art keywords
shafts
lines
pair
chassis
shaft
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.)
Granted
Application number
EP95420191A
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English (en)
French (fr)
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EP0692317B1 (de
Inventor
Daniel Ancrenaz
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
    • B06B1/161—Adjustable systems, i.e. where amplitude or direction of frequency of vibration can be varied
    • B06B1/166—Where the phase-angle of masses mounted on counter-rotating shafts can be varied, e.g. variation of the vibration phase

Definitions

  • the present invention relates to a vibration generating device, in particular intended to equip the table with a press for manufacturing concrete products such as pavers, blocks, border elements and the like.
  • a vibration generating device comprising two pairs of shafts each equipped with unbalances.
  • the unbalances of one pair of shafts can be out of phase with those of the other pair of shafts, so that the unbalances can be placed either in phase or in phase opposition from one pair to another , thus modulating the amplitude of the vibrations transmitted to the table, between a maximum value and a zero value.
  • This phase shift is achieved by means of a toothed belt engaged, on the one hand, around toothed pulleys wedged on the shafts and, on the other hand, on idler pulleys mounted idly on a chassis movable in a plane perpendicular to the shafts .
  • Patents or patent applications US 4 830 597, EP 0 400 510, WO 92/20467 or EP 0 600 526 describe devices of this type.
  • the toothed belts of these devices have significant lengths since they must be engaged around the pulleys of each shaft, and the movable frames have a high inertia.
  • These belts are subjected to significant and repeated tensile stresses, generating elongation and wear which are the source of precise positioning defects of the unbalances in phase opposition.
  • the parasitic vibrations which result from a slight phase shift of the unbalances entail, at the time of demolding, a risk of alteration or even destruction of the fresh products.
  • the present invention aims to remedy all of these drawbacks.
  • the device it relates to is of the aforementioned type, comprising four lines of parallel shafts, equipped with imbalances and distributed in two superimposed pairs, and a toothed belt engaged, on the one hand, around toothed pulleys wedged on the lines of shafts and, on the other hand, on idler side pulleys mounted idly on a chassis movable in a plane perpendicular to the lines of trees, the displacement of this chassis making it possible to phase the imbalances of a pair of lines of trees by relative to those of the pair of superimposed shaft lines, so that the unbalances can be placed either in phase or in phase opposition from one pair to another.
  • the two levers and the connecting rod have a very low inertia, and transmit only limited stresses to the belt during their passage from one position to the other.
  • the phase shift is rapid and the maintenance of the belt is limited, so that the production rate obtained is high.
  • the length of the belt is kept substantially constant, whatever the position of the levers, which is also conducive to the longevity of the belt and to obtaining a precise positioning of the imbalances in phase opposition.
  • the relative position of the two levers can be adjusted so as to compensate for any lengthening of the belt, and to keep an optimum tension of the latter.
  • the belt is engaged around only two pulleys and has a reduced length, also limiting the risks of wear and elongation.
  • the drive motor is directly connected to one of the lines of shafts comprising a toothed pulley and is not mounted on the chassis.
  • the toothed belt transmits only half of the driving power and the inertia of the chassis is reduced, which contributes to limiting the wear of the belt.
  • the vibrator shafts are supported by lubricated bearings, placed and maintained in the housings.
  • the temperature in these casings during operation remains low and stable, despite the turbulence caused by the high rotation speed and the amplitude of the vibrations.
  • the motor is arranged coaxially with the shaft line which it drives. This arrangement allows the engine to be moved away from the molding location, to isolate it from the dusty atmosphere surrounding the press, which is important for the reliability of this engine.
  • each lever has the shape of a relatively closed V and with branches of unequal lengths, the shortest branch comprising the idler pulley on its free end , and the longest branch being connected to the articulated rod.
  • the figures represent a vibration generator device 1 equipping table 2 with a press for manufacturing concrete products such as pavers, blocks, edge elements and the like.
  • the table 2 rests on the frame 3 of the press by means of flexible studs 4 and comprises, fixed to its lower face, two casings 5 each traversed by four shafts 6 equipped with unbalances 7. These shafts 6 are distributed on each casing 5, in two superimposed pairs, and are two to two coaxial from one casing 5 to another.
  • the shafts 6 are connected, by means of flexible couplings of cardan type 8, to drive shafts 9, the shafts 6 and 9 thus constituting four lines of shafts distributed in two superposed pairs.
  • shafts 9 Four of the shafts 9 include pinions 10 wedged on them.
  • the pinions 10 of two shafts 9 of the same pair mesh with each other.
  • the pinions 10 are housed in a casing 11, integral with the press frame, through which the shafts 9 pass.
  • the housings 5 and 11 contain the bearings of the shafts 6 and 9, and oil for the lubrication of these bearings and of the pinions 10.
  • One of these two shafts 9 is connected, by means of a flexible cardan coupling, to a drive motor 14, arranged coaxially with the shaft 9.
  • This motor is carried by a base fixed on a base 15.
  • Each lever 16 is placed laterally with respect to the shafts 6 and 9 and can pivot in a plane perpendicular to them.
  • the lower parts of the levers 16 are mounted in yokes fitted by walls 18 integral with the base 15.
  • the levers 16 have the shape of a relatively closed V and with branches 16a, 16b of unequal lengths.
  • the shortest branches 16a include idler pulleys 20, mounted on their free end, and the longest branches 16b, clearly protruding beyond the pulleys 20, are connected to the connecting rod 17 at their ends.
  • a toothed belt 21 is engaged, on the one hand, around the pulleys 12 and, on the other hand, on the idler pulleys 20, which constitute lateral return pulleys.
  • a double-acting cylinder 25 is connected to one of the levers 16 and to the base 15, while being pivotally mounted relative to one and to the other.
  • the shafts 6 and 9 are rotated by the motor 14, either directly with respect to the shaft 6 and the shaft 9 to which it is directly connected, or by means of the pinions 10 and the belt 21 for other trees.
  • the pinions 10 are used to drive the shafts 6 and 9 of each pair of shaft lines in opposite directions to one another.
  • the jack 25 makes it possible to move the chassis formed by the levers 16 and by the connecting rod 17 in a plane perpendicular to the shafts 6 and 9, and, therefore, to vary the length of the belt 21 extending between the two toothed pulleys 12.
  • This variation in length makes it possible to phase the unbalances 7 of the pair of upper shaft lines relative to those of the pair of lower shaft lines, so that the unbalances 7 can be placed either in phase or in opposition to phase from one pair to another, thus making it possible to modulate the amplitude of the vibrations transmitted to table 2, between a maximum value and a zero value.
  • the two pivoting levers 16 and the connecting rod 17 have a very low inertia, and transmit only limited stresses to the belt 21 when they pass from one position to the other. They thus make it possible to considerably limit the wear of the belt 21 and ensure precise positioning of the unbalances 7 in phase opposition.
  • the phase shift is rapid and the maintenance of the belt 21 is limited, so that the production rate obtained is high.
  • the length of the belt 21 is kept substantially constant, whatever the position of these levers 16, which is conducive to the longevity of the belt 21 and obtaining a precise positioning of the imbalances in phase opposition.
  • the belt 21 is engaged around only two pulleys 12, has a reduced length and transmits to the trees only half of the driving power, which also contributes to limiting the risks of wear and elongation.
  • the motor is far from the molding location, and is therefore isolated from the dusty environment surrounding the press.
  • the device 1 is compact and can be easily integrated into existing machines, with minimal adaptations.
  • the temperature in the casings 5 and 11 during operation remains low and stable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP95420191A 1994-07-13 1995-07-06 Vorrichtung zur Erzeugung von Schwingungen, insbesondere für einen Pressentisch zum Formen von Gegenständen aus Beton Expired - Lifetime EP0692317B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9408931A FR2722444B1 (fr) 1994-07-13 1994-07-13 Dispositif de vibration pour table de presse utilisee pour la fabrication de produits en beton
FR9408931 1994-07-13

Publications (2)

Publication Number Publication Date
EP0692317A1 true EP0692317A1 (de) 1996-01-17
EP0692317B1 EP0692317B1 (de) 1997-08-06

Family

ID=9465537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95420191A Expired - Lifetime EP0692317B1 (de) 1994-07-13 1995-07-06 Vorrichtung zur Erzeugung von Schwingungen, insbesondere für einen Pressentisch zum Formen von Gegenständen aus Beton

Country Status (5)

Country Link
EP (1) EP0692317B1 (de)
AT (1) ATE156391T1 (de)
DE (1) DE69500519T2 (de)
ES (1) ES2105857T3 (de)
FR (1) FR2722444B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004069504A1 (de) * 2003-02-05 2004-08-19 Institut für Fertigteiltechnik und Fertigbau Weimar e.V. Vorrichtung zur formgebung von gemengen
WO2009012922A2 (de) 2007-07-24 2009-01-29 ThyssenKrupp Fördertechnik GmbH Unwuchtantrieb für siebmaschinen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006029241A1 (de) * 2006-06-26 2007-12-27 Gebr. Bellmer Gmbh Maschinenfabrik Vorrichtung zum Erzeugen von Schwingungen
ES2383408B1 (es) * 2008-12-01 2013-04-29 Metalurgica Poyatos, S.A. Mecanismo para un dispositivo vibrador y dispositivo vibrador

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830597A (en) 1986-08-27 1989-05-16 Knauer Gmbh Maschinenfabrik Vibrator for a block molding machine
EP0400510A1 (de) 1989-06-02 1990-12-05 M.A.B. Vorrichtung mit Rütteltisch zur Herstellung von Betongegenständen
WO1992020467A1 (fr) 1991-05-22 1992-11-26 Societe Materiels Vincent Vaillant Mvv S.A. Dispositif autorisant le controle et l'action d'effets vibratoires sur des machines et materiels en vue notamment du traitement de produits destines a etre fibres, tasses et compactes
EP0600526A1 (de) 1992-12-03 1994-06-08 Antonio Poyatos Diaz Vibrationsvorrichtung für Maschinen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886976A (en) * 1956-07-13 1959-05-19 Norman L Dean System for converting rotary motion into unidirectional motion
DE8801315U1 (de) * 1988-02-03 1988-03-17 Hella KG Hueck & Co, 4780 Lippstadt Schwingförderer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4830597A (en) 1986-08-27 1989-05-16 Knauer Gmbh Maschinenfabrik Vibrator for a block molding machine
EP0400510A1 (de) 1989-06-02 1990-12-05 M.A.B. Vorrichtung mit Rütteltisch zur Herstellung von Betongegenständen
WO1992020467A1 (fr) 1991-05-22 1992-11-26 Societe Materiels Vincent Vaillant Mvv S.A. Dispositif autorisant le controle et l'action d'effets vibratoires sur des machines et materiels en vue notamment du traitement de produits destines a etre fibres, tasses et compactes
EP0600526A1 (de) 1992-12-03 1994-06-08 Antonio Poyatos Diaz Vibrationsvorrichtung für Maschinen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004069504A1 (de) * 2003-02-05 2004-08-19 Institut für Fertigteiltechnik und Fertigbau Weimar e.V. Vorrichtung zur formgebung von gemengen
US7527487B2 (en) 2003-02-05 2009-05-05 Institut für Fertigteiltechnik und Fertigbau Weimar e.V. Device for moulding mixtures
WO2009012922A2 (de) 2007-07-24 2009-01-29 ThyssenKrupp Fördertechnik GmbH Unwuchtantrieb für siebmaschinen
WO2009012922A3 (de) * 2007-07-24 2009-11-26 ThyssenKrupp Fördertechnik GmbH Unwuchtantrieb für siebmaschinen
AU2008280515B2 (en) * 2007-07-24 2012-12-13 Flsmidth A/S Unbalanced drive for screening machines
US8925731B2 (en) 2007-07-24 2015-01-06 Thyssenkrupp Industrial Solutions Ag Unbalanced drive for screening machines

Also Published As

Publication number Publication date
DE69500519D1 (de) 1997-09-11
ATE156391T1 (de) 1997-08-15
EP0692317B1 (de) 1997-08-06
FR2722444B1 (fr) 1996-08-23
DE69500519T2 (de) 1998-02-12
ES2105857T3 (es) 1997-10-16
FR2722444A1 (fr) 1996-01-19

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