WO2001096228A2 - Power microjack - Google Patents

Power microjack Download PDF

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Publication number
WO2001096228A2
WO2001096228A2 PCT/FR2001/001812 FR0101812W WO0196228A2 WO 2001096228 A2 WO2001096228 A2 WO 2001096228A2 FR 0101812 W FR0101812 W FR 0101812W WO 0196228 A2 WO0196228 A2 WO 0196228A2
Authority
WO
WIPO (PCT)
Prior art keywords
rod
axis
plate
micrometric
screw
Prior art date
Application number
PCT/FR2001/001812
Other languages
French (fr)
Inventor
Thales
Original Assignee
Da Silva, Carlos
Sauvageot, Paul
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 Da Silva, Carlos, Sauvageot, Paul filed Critical Da Silva, Carlos
Priority to AU67628/01A priority Critical patent/AU6762801A/en
Publication of WO2001096228A2 publication Critical patent/WO2001096228A2/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for

Definitions

  • the present invention relates to a micrometric power cylinder.
  • the present invention relates to a micrometric cylinder which can move heavy loads (several tonnes for example) with a very good resolution (of the order of 1 ⁇ m), which is faithful (repeatability of the positioning of the same order of magnitude as its resolution ) and which can operate in aggressive environments with the minimum of maintenance, while being as inexpensive as possible.
  • the jack according to the invention comprises, for at least one axis of movement, a movable corner driven by a micrometric screw, the face of this corner which is oblique with respect to the axis of the screw being in contact with the front face , which is parallel to it, of the cylinder rod which moves perpendicular to the axis of the micrometric screw.
  • FIG. 1 is a side perspective view of a cylinder according to the invention, the movable core of which is in the "low" position, that is to say returned to its body;
  • FIG. 2 is a side view, in section, of the cylinder of Figure
  • the movable core of which occupies the same position as in the figure - Figure 3 is a side view, in section of the cylinder of Figure 1, the movable core is in the "high" position, that is to say, out of its body;
  • FIG. 4 is a perspective view of a removable operating device of the micrometric screw of the jack of Figure 1;
  • FIGS. 5 to 7 are top views of the cylinder of Figure 1, for different positions of its movable plate.
  • the jack 1 described below is intended to lift relatively heavy loads vertically, for example up to 5 tonnes, with a resolution of the order of 1 ⁇ m, and a stroke of several centimeters for the three axes, but it is of course, these characteristics, which are given for information only, can be adapted to the different use cases.
  • the jack 1 essentially comprises in a housing 2, a wedge 3 driven by a micrometric screw 4, a rod 5 and a movable plate 6 integral with the rod 5.
  • the wedge 3 is a parallelepiped with pyramidal section whose flat side face moves reduced friction on the bottom wall 7 of the housing 2 when the screw 4 is rotated.
  • Means block the corner 3 in rotation and guide it so that it can only move in translation on the wall 7, parallel to the axis of the screw 4.
  • the head of the screw is passed 4 by a bearing 8 fixed to the housing 2, and a cup 9 is fixed on this head, the shape and dimensions of which are adapted to those of the operating end 10 of a reduction gear 11 maneuverable by a removable lever 12, the reduction gear 11 also being removable.
  • this manually operated reducer can be replaced by a reducer controlled by an electric motor.
  • the oblique upper face 13 of the corner 3 makes an acute angle par with respect to its lower face 14 (which moves on the wall 7 and which is assumed to be horizontal in operation).
  • the value of the angle ⁇ is a function of the maximum load to be lifted, the source and the position resolution which it is desired to obtain. It is advantageously between 10 and 30 ° approximately.
  • the movable "rod" 5 of the jack 1 has its axis perpendicular to the axis of the screw 4. Its lower front face makes an angle Malawi with its axis and is arranged so as to be parallel to the face 13 of the corner 3 while resting sure the latter.
  • the rod 5 is guided in translation, parallel to its axis, by slides 15, only two of which are visible in the drawing (those extending perpendicular to the cutting plane).
  • the rod 5 At its upper end, the rod 5 comprises a plate 16, of square shape for example.
  • a central cutout 16A is made in the plate 6 to allow the end of the rod 5 to pass through.
  • this cutout are greater than those of the plate 16, so that the plate 6 can move in a plane perpendicular to the axis of the rod 5, its movements being limited by the plate 16, on the lateral faces of which the rods 17 to 20 of four micrometric cylinders 21 to 24 abut whose axes are coplanar and form an orthogonal cross: the axes of the cylinders 21 and 23 are combined, as are those of the jacks 22 and 24 to which they are perpendicular.
  • the plane formed by these axes of the cylinders is perpendicular to the axis of the rod 5 and passes through the middle of the height (thickness) of the plate 6.
  • the bodies of the cylinders 21 to 24 are integral with the plate 6, while their rods are applied against the plate 16. These jacks are controlled in opposition for each of the two axes, so as to create a relative movement of the plate 6 relative to the plate 16, therefore relative to the rod 5.
  • the starting position for which the rods of the four jacks are applied in abutment against the plate 16 and are at mid-stroke (FIG. 5)
  • the rod 18 is controlled so that it enters the body of the cylinder 23 by the same distance D. It is the same for the other axis, common to the cylinders 22 and 24 ( Figure 6).
  • Figure 7 the opposite position of the plate 6 relative to the plate 16.
  • the horizontal movements of the plate 6 relative to the plate 16 do not have the same micrometric resolution as the vertical movements of the rod 5 relative to the body of the cylinder 2, and if it was desired to obtain this same micrometric resolution, it would suffice to adopt for one of the two horizontal directions, or for both, the same type of wedge movement, micrometric screw and rod oblique front face sliding in relation to the corner.
  • the contact surfaces of the wedge and the oblique front face of the rod are treated in an appropriate manner to facilitate their relative sliding while minimizing their wear, as are the surface 14 of the wedge 3 and the upper surface. of wall 7 in contact with this surface 14, and that the movements of the plate 6 can be controlled in one direction, using only two jacks (17 and 18 or 19 and 20).

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Machine Tool Units (AREA)
  • Details Of Measuring And Other Instruments (AREA)

Abstract

4).The invention concerns a jack essentially comprising a mobile wedge (3) acting on a rod (5) whereof the front surface in contact with the oblique surface (13) of the wedge has the same skew. The wedge is actuated by a micrometer screw (4).

Description

VERIN MICROMETRIQUE DE PUISSANCE MICROMETRIC POWER CYLINDER
La présente invention se rapporte à un vérin micrométrique de puissance.The present invention relates to a micrometric power cylinder.
Pour déplacer des charges lourdes (plusieurs tonnes, par exemple), on utilise classiquement des vérins hydrauliques ou pneumatiques. De tels vérins, quoique très robustes et pouvant être utilisés en environnement hostile, nécessitent une centrale hydraulique ou pneumatique, et ne permettent pas d'obtenir des déplacements micrométriques (avec une résolution de l'ordre de 1 //m). On connaît également des vérins à vis, qui permettent d'obtenir des déplacements micrométriques, mais pour de faibles charges (nettement inférieures à 1 tonne), et généralement avec un jeu provoquant un manque de fidélité du positionnement précis de la partie mobile de ces vérins.To move heavy loads (several tonnes, for example), hydraulic or pneumatic cylinders are conventionally used. Such cylinders, although very robust and which can be used in a hostile environment, require a hydraulic or pneumatic power station, and do not make it possible to obtain micrometric displacements (with a resolution of the order of 1 // m). Screw jacks are also known, which make it possible to obtain micrometric displacements, but for low loads (significantly less than 1 ton), and generally with a clearance causing a lack of fidelity of the precise positioning of the mobile part of these jacks. .
La présente invention a pour objet un vérin micrométrique pouvant déplacer de lourdes charges (plusieurs tonnes par exemple) avec une très bonne résolution (de l'ordre de 1 μm), qui soit fidèle (répétibilité du positionnement du même ordre de grandeur que sa résolution) et qui puisse fonctionner dans des milieux agressifs avec le minimum d'entretien, tout en étant le moins onéreux possible.The present invention relates to a micrometric cylinder which can move heavy loads (several tonnes for example) with a very good resolution (of the order of 1 μm), which is faithful (repeatability of the positioning of the same order of magnitude as its resolution ) and which can operate in aggressive environments with the minimum of maintenance, while being as inexpensive as possible.
Le vérin conforme à l'invention comporte, pour au moins un axe de déplacement, un coin mobile mû par une vis micrométrique, la face de ce coin qui est oblique par rapport à l'axe de la vis étant en contact avec la face frontale, qui lui est parallèle, de la tige du vérin qui se déplace perpendiculairement à l'axe de la vis micrométrique.The jack according to the invention comprises, for at least one axis of movement, a movable corner driven by a micrometric screw, the face of this corner which is oblique with respect to the axis of the screw being in contact with the front face , which is parallel to it, of the cylinder rod which moves perpendicular to the axis of the micrometric screw.
La présente invention sera mieux comprise à la lecture de la description détaillée d'un mode réalisation, pris à titre d'exemple non limitatif et illustré par le dessin annexé, sur lequel :The present invention will be better understood on reading the detailed description of an embodiment, taken by way of nonlimiting example and illustrated by the appended drawing, in which:
- la figure 1 est une vue de côté en perspective d'un vérin conforme à l'invention, dont le noyau mobile est en position « basse », c'est-à-dire rentré dans son corps ; - la figure 2 est une vue de côté, en coupe, du vérin de la figure- Figure 1 is a side perspective view of a cylinder according to the invention, the movable core of which is in the "low" position, that is to say returned to its body; - Figure 2 is a side view, in section, of the cylinder of Figure
1 , dont le noyau mobile occupe la même position qu'en figure - la figure 3 est une vue de côté, en coupe du vérin de la figure 1 , dont le noyau mobile est en position « haute », c'est-à-dire sorti au maximum de son corps ;1, the movable core of which occupies the same position as in the figure - Figure 3 is a side view, in section of the cylinder of Figure 1, the movable core is in the "high" position, that is to say, out of its body;
- la figure 4 est une vue en perspective d'un dispositif de manoeuvre amovible de la vis micrométrique du vérin de la figure 1 ; et- Figure 4 is a perspective view of a removable operating device of the micrometric screw of the jack of Figure 1; and
- les figures 5 à 7 sont des vues de dessus du vérin de la figure 1 , pour différentes positions de son plateau mobile.- Figures 5 to 7 are top views of the cylinder of Figure 1, for different positions of its movable plate.
Le vérin 1 décrit ci-dessous est destiné à soulever verticalement des charges relativement lourdes, par exemple jusqu'à 5 tonnes, avec une résolution de l'ordre de 1 μm, et une course de plusieurs centimètres pour les trois axes, mais il est bien entendu que ces caractéristiques, qui ne sont données qu'à titre indicatif, peuvent être adaptées aux différents cas d'utilisation. Le vérin 1 comporte essentiellement dans un boîtier 2, un coin 3 entraîné par une vis micrométrique 4, une tige 5 et un plateau mobile 6 solidaire de la tige 5. Le coin 3 est un parallélépipède à section pyramidale dont une face latérale plane se déplace à frottements réduits sur la paroi inférieure 7 du boîtier 2 lorsque la vis 4 est entraînée en rotation. Des moyens, non représentés, bloquent en rotation le coin 3 et le guident pour qu'il ne puisse se déplacer qu'en translation sur la paroi 7, parallèlement à l'axe de la vis 4. On fait passer la tête de la vis 4 par un palier 8 fixé au boîtier 2, et on fixe sur cette tête une coupelle 9 dont la forme et les dimensions sont adaptées à celles de l'extrémité de manoeuvre 10 d'un réducteur 11 manoeuvrable par un levier amovible 12, le réducteur 11 étant lui aussi amovible. Bien entendu, ce réducteur à manoeuvre manuelle peut être remplacé par un réducteur commandé par un moteur électrique.The jack 1 described below is intended to lift relatively heavy loads vertically, for example up to 5 tonnes, with a resolution of the order of 1 μm, and a stroke of several centimeters for the three axes, but it is of course, these characteristics, which are given for information only, can be adapted to the different use cases. The jack 1 essentially comprises in a housing 2, a wedge 3 driven by a micrometric screw 4, a rod 5 and a movable plate 6 integral with the rod 5. The wedge 3 is a parallelepiped with pyramidal section whose flat side face moves reduced friction on the bottom wall 7 of the housing 2 when the screw 4 is rotated. Means, not shown, block the corner 3 in rotation and guide it so that it can only move in translation on the wall 7, parallel to the axis of the screw 4. The head of the screw is passed 4 by a bearing 8 fixed to the housing 2, and a cup 9 is fixed on this head, the shape and dimensions of which are adapted to those of the operating end 10 of a reduction gear 11 maneuverable by a removable lever 12, the reduction gear 11 also being removable. Of course, this manually operated reducer can be replaced by a reducer controlled by an electric motor.
La face supérieure oblique 13 du coin 3 fait un angle aigu  par rapport à sa face inférieure 14 (qui se déplace sur la paroi 7 et qui est supposée être horizontale en fonctionnement). La valeur de l'angle  est fonction de la charge maximale à soulever, de la source et de la résolution de position que l'on désire obtenir. Elle est avantageusement comprise entre 10 et 30° environ. La « tige » mobile 5 du vérin 1 a son axe perpendiculaire à l'axe de la vis 4. Sa face frontale inférieure fait un angle  avec son axe et est disposée de façon à être parallèle à la face 13 du coin 3 en reposant sur cette dernière. La tige 5 est guidée en translation, parallèlement à son axe, par des glissières 15, dont seulement deux sont visibles sur le dessin (celles s'étendant perpendiculairement au plan de coupe). A son extrémité supérieure, la tige 5 comporte une plaque 16, de forme carrée par exemple. Une découpe centrale 16A est pratiquée dans le plateau 6 pour laisser passer l'extrémité de la tige 5. Les dimensions de cette découpe sont supérieures à celles de la plaque 16, afin que le plateau 6 puisse se déplacer dans un plan perpendiculaire à l'axe de la tige 5, ses déplacements étant limités par la plaque 16, sur les faces latérales de laquelle butent les tiges 17 à 20 de quatre vérins micrométriques 21 à 24 dont les axes sont coplanaires et forment une croix orthogonale : les axes des vérins 21 et 23 sont confondus, de même ceux des vérins 22 et 24 auxquels ils sont perpendiculaires. Le plan formé par ces axes des vérins est perpendiculaire à l'axe de la tige 5 et passe par le milieu de la hauteur (épaisseur) du plateau 6. Les corps des vérins 21 à 24 sont solidaires du plateau 6, tandis que leurs tiges sont appliquées contre la plaque 16. Ces vérins sont commandés en opposition pour chacun des deux axes, de façon à créer un mouvement relatif du plateau 6 par rapport à la plaque 16, donc par rapport à la tige 5. Ainsi, par exemple, de la position de départ, pour laquelle les tiges des quatre vérins sont appliquées en butée contre la plaque 16 et sont à mi- course (figure 5), si on commande la sortie, sur une distance D, de la tige 17 du vérin 21 , on commande la tige 18 de façon qu'elle rentre dans le corps du vérin 23 de la même distance D. Il en est de même pour l'autre axe, commun aux vérins 22 et 24 (figure 6). On a représenté en figure 7 la position opposée du plateau 6 par rapport à la plaque 16. Bien entendu, les mouvements horizontaux du plateau 6 par rapport à la plaque 16 n'ont pas la même résolution micrométrique que les mouvements verticaux de la tige 5 par rapport au corps du vérin 2, et si on désirait obtenir cette même résolution micrométrique, il suffirait d'adopter pour l'une des deux directions horizontales, ou pour les deux, le même type de mouvement à coin, vis micrométrique et tige à face frontale oblique glissant par rapport au coin. Il est également bien entendu que les surfaces en contact du coin et de la face frontale oblique de la tige sont traitées de façon appropriée pour faciliter leur glissement relatif tout en minimisant leur usure, de même que la surface 14 du coin 3 et la surface supérieure de la paroi 7 en contact avec cette surface 14, et que les mouvements du plateau 6 peuvent être commandés dans une seule direction, à l'aide de deux vérins seulement (17 et 18 ou 19 et 20). The oblique upper face 13 of the corner 3 makes an acute angle par with respect to its lower face 14 (which moves on the wall 7 and which is assumed to be horizontal in operation). The value of the angle  is a function of the maximum load to be lifted, the source and the position resolution which it is desired to obtain. It is advantageously between 10 and 30 ° approximately. The movable "rod" 5 of the jack 1 has its axis perpendicular to the axis of the screw 4. Its lower front face makes an angle avec with its axis and is arranged so as to be parallel to the face 13 of the corner 3 while resting sure the latter. The rod 5 is guided in translation, parallel to its axis, by slides 15, only two of which are visible in the drawing (those extending perpendicular to the cutting plane). At its upper end, the rod 5 comprises a plate 16, of square shape for example. A central cutout 16A is made in the plate 6 to allow the end of the rod 5 to pass through. The dimensions of this cutout are greater than those of the plate 16, so that the plate 6 can move in a plane perpendicular to the axis of the rod 5, its movements being limited by the plate 16, on the lateral faces of which the rods 17 to 20 of four micrometric cylinders 21 to 24 abut whose axes are coplanar and form an orthogonal cross: the axes of the cylinders 21 and 23 are combined, as are those of the jacks 22 and 24 to which they are perpendicular. The plane formed by these axes of the cylinders is perpendicular to the axis of the rod 5 and passes through the middle of the height (thickness) of the plate 6. The bodies of the cylinders 21 to 24 are integral with the plate 6, while their rods are applied against the plate 16. These jacks are controlled in opposition for each of the two axes, so as to create a relative movement of the plate 6 relative to the plate 16, therefore relative to the rod 5. Thus, for example, the starting position, for which the rods of the four jacks are applied in abutment against the plate 16 and are at mid-stroke (FIG. 5), if the output, over a distance D, of the rod 17 of the jack 21 is controlled, the rod 18 is controlled so that it enters the body of the cylinder 23 by the same distance D. It is the same for the other axis, common to the cylinders 22 and 24 (Figure 6). There is shown in Figure 7 the opposite position of the plate 6 relative to the plate 16. Of course, the horizontal movements of the plate 6 relative to the plate 16 do not have the same micrometric resolution as the vertical movements of the rod 5 relative to the body of the cylinder 2, and if it was desired to obtain this same micrometric resolution, it would suffice to adopt for one of the two horizontal directions, or for both, the same type of wedge movement, micrometric screw and rod oblique front face sliding in relation to the corner. It is also understood that the contact surfaces of the wedge and the oblique front face of the rod are treated in an appropriate manner to facilitate their relative sliding while minimizing their wear, as are the surface 14 of the wedge 3 and the upper surface. of wall 7 in contact with this surface 14, and that the movements of the plate 6 can be controlled in one direction, using only two jacks (17 and 18 or 19 and 20).

Claims

REVENDICATIONS
1. Vérin micrométrique de puissance, caractérisé par le fait qu'il comporte, pour au moins un axe de déplacement, un coin mobile (3) mû par une vis micrométrique (4), la face (13) de ce coin qui est oblique par rapport à l'axe de la vis étant en contact avec la face frontale, qui lui est parallèle, de la tige (5) du vérin, qui se déplace perpendiculairement à l'axe de la vis micrométrique.1. Power micrometric cylinder, characterized in that it comprises, for at least one axis of movement, a movable corner (3) moved by a micrometric screw (4), the face (13) of this corner which is oblique relative to the axis of the screw being in contact with the front face, which is parallel to it, of the rod (5) of the jack, which moves perpendicular to the axis of the micrometric screw.
2. Vérin selon la revendication 1 , caractérisé par le fait qu'il comporte un plateau (6) à l'extrémité libre de sa tige, disposé perpendiculairement à l'axe de cette tige et dont les déplacements, dans un plan perpendiculaire à l'axe de cette tige sont commandés par au moins un couple de vérins (17-18, 19-20) dont les corps sont solidaires du plateau et dont les tiges s'appuient sur une plaque (16) fixée à l'extrémité de la tige (5) coopérant avec le coin mobile. 2. Cylinder according to claim 1, characterized in that it comprises a plate (6) at the free end of its rod, arranged perpendicular to the axis of this rod and whose displacements, in a plane perpendicular to the axis of this rod are controlled by at least a pair of jacks (17-18, 19-20) whose bodies are integral with the plate and whose rods are supported on a plate (16) fixed to the end of the rod (5) cooperating with the movable wedge.
PCT/FR2001/001812 2000-06-13 2001-06-12 Power microjack WO2001096228A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU67628/01A AU6762801A (en) 2000-06-13 2001-06-12 Power microjack

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0007520A FR2810028B1 (en) 2000-06-13 2000-06-13 MICROMETRIC POWER CYLINDER
FR00/0752020000613 2000-06-13

Publications (1)

Publication Number Publication Date
WO2001096228A2 true WO2001096228A2 (en) 2001-12-20

Family

ID=8851214

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2001/001812 WO2001096228A2 (en) 2000-06-13 2001-06-12 Power microjack

Country Status (3)

Country Link
AU (1) AU6762801A (en)
FR (1) FR2810028B1 (en)
WO (1) WO2001096228A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4167538B2 (en) * 2003-05-12 2008-10-15 サンデン株式会社 Vending machine temperature control unit mounting structure
FR2956344B1 (en) * 2010-02-16 2012-02-17 Claude Marcel Hubert Malher SELF-LOCKING TRAPEZES CONSTITUTING A LIFTING APPARATUS ADAPTABLE UNDER A TABLE UNDER-TABLE WRAPPER OR MACHINING TABLE
CN102381657A (en) * 2011-09-16 2012-03-21 李忠理 Micro jack

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1348851A (en) * 1919-10-01 1920-08-10 William M Cook Auto-jack
GB1234551A (en) * 1969-01-21 1971-06-03
FR2152427B3 (en) * 1971-09-14 1974-05-10 Micro Controle
FR2206542B1 (en) * 1972-11-15 1976-10-29 Thomson Csf
FR2394724A1 (en) * 1977-06-13 1979-01-12 Micro Controle Drive mechanism for use in metrology - consists of threaded shaft with main and auxiliary nuts coupled by metallic bellows
FR2523942A1 (en) * 1982-03-26 1983-09-30 Frogerais Ets Edmond Lifting and handling wedge for pastille mould - has two inclined lifting planes actuated by threaded rod for relative sliding
FR2553397B1 (en) * 1983-10-18 1987-02-27 Freyssinet Int Stup IMPROVEMENTS IN DEVICES FOR LIFTING HIGH LOADS

Also Published As

Publication number Publication date
FR2810028B1 (en) 2004-05-28
AU6762801A (en) 2001-12-24
FR2810028A1 (en) 2001-12-14

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