EP1858665A1 - Tool-holder mandrel for equipping a rotating machine - Google Patents

Tool-holder mandrel for equipping a rotating machine

Info

Publication number
EP1858665A1
EP1858665A1 EP06743587A EP06743587A EP1858665A1 EP 1858665 A1 EP1858665 A1 EP 1858665A1 EP 06743587 A EP06743587 A EP 06743587A EP 06743587 A EP06743587 A EP 06743587A EP 1858665 A1 EP1858665 A1 EP 1858665A1
Authority
EP
European Patent Office
Prior art keywords
jaw
mandrel
face
tool
circle
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.)
Withdrawn
Application number
EP06743587A
Other languages
German (de)
French (fr)
Inventor
Yves Marie Marcel Cachod
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.)
Amyot SA
Original Assignee
Amyot SA
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 Amyot SA filed Critical Amyot SA
Publication of EP1858665A1 publication Critical patent/EP1858665A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/1207—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving obliquely to the axis of the chuck in a plane containing this axis
    • B23B31/1215—Details of the jaws
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17615—Obliquely guided reciprocating jaws
    • Y10T279/17623—Threaded sleeve and jaw
    • Y10T279/17632—Conical sleeve

Definitions

  • the present invention relates to a tool chuck for the equipment of a rotary machine.
  • the clamping of a tool on a mandrel is achieved by jaws, generally three in number, offset angularly by 120 ° relative to each other.
  • the jaws are convergent towards the front of the mandrel, and are movable in a direction of approximation to each other to achieve the clamping of a tool, and in a direction of recoil, corresponding to a spacing to release the tool.
  • This axial displacement of the jaws which is accompanied by a radial displacement, also makes it possible to adapt the spacing between the jaws to the diameter of the tool that should be tightened.
  • the body of the mandrel comprises cavities of generally cylindrical shape, for guiding jaws of complementary shape.
  • the jaws which have a generally cylindrical shape in their guide zone inside the mandrel have ends of different shapes, including tapered ends having an edge facing inwards, so that the clamping on the tool is made at three edges belonging to the three jaws.
  • the object of the invention is therefore to provide a mandrel whose jaws are made simply and economically.
  • the chuck which it concerns, of the type comprising a body inside which are mounted, guided in translation, several jaws converging forward to achieve the clamping of a tool, each jaw having a toothing facing outwards or inwards, intended to cooperate with a drive member situated outside or inside, is characterized in that:
  • each jaw has a rectangular section, and is guided in a complementary profile groove in the body, The orientation of each jaw is such that its inward facing face is situated in a plane substantially tangential to a circle centered on the axis of the mandrel,
  • Each jaw is positioned in the body so that the longitudinal median plane of its inward facing face is offset from the nip on a circle centered on the axis of the mandrel and representative of the tail of the mandrel. a tool, so as to make contact with this circle at an edge, said active edge, delimiting this inner face, and located forward or tangent in the clamping direction.
  • Each jaw having a rectangular section can be obtained in a simple manner, for example by cutting a metal plate of suitable thickness, corresponding to the thickness of the jaws. It is also possible to obtain this type of jaw by simple operations such as forging operations.
  • the rectangular shape of the jaws nevertheless allows a clamping along the edges, the offset positioning of the jaws, as specified above, allowing contact with the tail of the tool along a so-called active edge edge delimiting the inner face of each bit. It may be noted that if it is a question of tightening the tail of a tool of hexagonal shape, the three inner planar faces, rest on three of the six faces of the tool and ensure a perfect tightening thereof.
  • the face of each jaw turned inward forms an angle of a few degrees, on the outside, with the tangent to a circle centered on the axis of the mandrel, passing through the point of contact between the active edge and this circle.
  • This feature ensures the clamping of a circular tool shank along three edges corresponding to the active edges of the inner face of the three jaws.
  • the toothing of each jaw is defined by cuts having walls perpendicular to the longitudinal plane of the jaw.
  • This feature is advantageous in that the teeth are obtained in a simple manner, by simple cutting, and can nevertheless mesh with a thread, this thanks to the offset of the position of the jaws, by relative to a position in which the longitudinal plane of each jaw would pass through the axis of the mandrel.
  • each jaw has in at least one of its lateral faces, at least one longitudinal groove, in which is intended to be engaged at least one stud projecting from the face facing the wall of the groove in which the jaw is engaged and guided.
  • the toothing of each jaw is formed on the face of the jaw turned inwards and cooperates with a central head threaded with a step to the left to obtain the movement of the jaws in one direction or the other according to the direction of rotation of the body and the head.
  • the toothing of each jaw is formed on the face of the jaw turned outwardly and cooperates with an outer nut driven by a casing pivotally mounted on the body.
  • Figure 1 is a perspective view in the clamping position of a tool whose tail has a hexagonal section
  • Figure 2 is a front view of the mandrel of Figure 1;
  • Figure 3 is a perspective view of two jaws of the mandrel, in the clamping position of the same tool, the outside of the mandrel has been torn off;
  • Figure 4 is a front view of the mandrel in the clamping position of a cylindrical drill;
  • Figure 5 is a longitudinal sectional view, along line V-V of Figure 4.
  • the mandrel shown in Figures 1 to 5 comprises a body 2 inside which is mounted a central head 3 for attachment to the shaft of a rotating machine, the central head 3 comprising in its front part an external thread 4
  • This mandrel is equipped with a retaining ring 5 integral with the central head, as well as in its front part with a clamping ring 6.
  • the body 2 has three longitudinal recesses of rectangular section, each serving for mounting and guiding of a bit 7.
  • each of the jaws has a rectangular section, which allows to obtain in a simple manner, for example, by cutting into a plate of predetermined thickness.
  • Each of the jaws has, on its face turned inwards, toothing 8 obtained by cuts having walls perpendicular to the longitudinal plane of the jaws.
  • each jaw comprises, in one of the lateral faces, a longitudinal groove 9, in which is intended to be engaged at least one protruding stud facing the wall of the groove in which is engaged and guided the bit considered.
  • each jaw is located in a plane substantially tangential to a circle 12 centered on the axis of the mandrel.
  • each jaw is positioned in the body so that the longitudinal median plane P of its face 10 is offset relative to its line of contact on a circle centered on the axis of the mandrel and representative of the tail of a tool. In this way, the contact with the circle is made at an edge 13 called active edge, which is located forward or tangent in the clamping direction of the tool.
  • the clamping is done by pressing the three inner faces 10 of the jaws on three sides of the shank 15 of the tool.
  • the clamping of the tail 17 is formed at the three active edges 13 of the three jaws.
  • the invention provides a great improvement to the existing technique by providing a mandrel of simple structure, insofar as the jaws it comprises can be obtained by mechanical operations or by operations of forging very simple and inexpensive.
  • the invention is not limited to the single embodiment of mandrel comprising a threaded central head with a left-hand step, but embraces all the variants thereof. It is thus that the teeth of each jaw could be arranged on the face of the jaw turned outwardly and cooperate with an outer nut driven by a casing pivotally mounted on the body, without we go out of the frame of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

The invention concerns a mandrel comprising a body (2) wherein are mounted, guided in translation, several jaws (7) which converge forward to clamp a tool. Each jaw (7) has a rectangular cross-section, and is guided in a groove with complementary profile provided in the body, the orientation of each jaw (7) is such that its side (10) facing inside is located in a plane substantially tangent to a circle (12) centered on the axis of the mandrel, and each jaw (7) is positioned in the body such that the longitudinal median plane (P) of its side (10) facing inside is offset relative to the contact line on a circle (12) centered on the axis of the mandrel and representing the shank of a tool, so as to provide a contact with said circle an edge (13), called active edge, delimiting said inner side (10), and located in front or tangent in the clamping direction.

Description

Mandrin porte-outil pour l'équipement d'une machine tournante Tool chuck for the equipment of a rotating machine
La présente invention a pour objet un mandrin porte-outil pour l'équipement d'une machine tournante.The present invention relates to a tool chuck for the equipment of a rotary machine.
Le serrage d'un outil sur un mandrin est réalisé par des mors, généralement au nombre de trois, décalés angulairement de 120° les uns par rapport aux autres. Les mors sont convergents vers l'avant du mandrin, et sont déplaçables dans un sens de rapprochement les uns des autres pour réaliser le serrage d'un outil, et dans un sens de recul, correspondant à un écartement pour libérer l'outil. Ce déplacement axial des mors qui s'accompagne d'un déplacement radial, permet également d'adapter l'écartement entre les mors au diamètre de l'outil qu'il convient de serrer.The clamping of a tool on a mandrel is achieved by jaws, generally three in number, offset angularly by 120 ° relative to each other. The jaws are convergent towards the front of the mandrel, and are movable in a direction of approximation to each other to achieve the clamping of a tool, and in a direction of recoil, corresponding to a spacing to release the tool. This axial displacement of the jaws which is accompanied by a radial displacement, also makes it possible to adapt the spacing between the jaws to the diameter of the tool that should be tightened.
De façon connue, le corps du mandrin comprend des cavités de forme générale cylindrique, servant au guidage de mors de forme complémentaire. Il en résulte des opérations complexes d'usinage, tant pour réaliser les cavités de guidage des mors, que pour réaliser les mors eux- mêmes. En effet, les mors qui possèdent une forme générale cylindrique dans leur zone de guidage à l'intérieur du mandrin, comportent des extrémités de formes différentes, notamment des extrémités effilées comportant une arête tournée vers l'intérieur, de façon que le serrage sur l'outil soit réalisé au niveau de trois arêtes appartenant aux trois mors.In known manner, the body of the mandrel comprises cavities of generally cylindrical shape, for guiding jaws of complementary shape. This results in complex machining operations, both to achieve the guiding cavities of the jaws, as to achieve the jaws themselves. Indeed, the jaws which have a generally cylindrical shape in their guide zone inside the mandrel, have ends of different shapes, including tapered ends having an edge facing inwards, so that the clamping on the tool is made at three edges belonging to the three jaws.
Si les solutions mises en oeuvre de façon connue donnent satisfaction d'un point de vue technique, elles sont très coûteuses de mise en oeuvre, notamment en raison du nombre des opérations d'usinage nécessaires. Le but de l'invention est donc de fournir un mandrin dont les mors soient réalisés de façon simple et économique.If the solutions implemented in known manner are satisfactory from a technical point of view, they are very expensive to implement, in particular because of the number of machining operations required. The object of the invention is therefore to provide a mandrel whose jaws are made simply and economically.
A cet effet, le mandrin qu'elle concerne, du type comportant un corps à l'intérieur duquel sont montés, guidés en translation, plusieurs mors qui convergent vers l'avant pour réaliser le serrage d'un outil, chaque mors comportant une denture tournée vers l'extérieur ou vers l'intérieur, destinée à coopérer avec un organe d'entraînement situé à l'extérieur ou à l'intérieur est caractérisé en ce que:For this purpose, the chuck which it concerns, of the type comprising a body inside which are mounted, guided in translation, several jaws converging forward to achieve the clamping of a tool, each jaw having a toothing facing outwards or inwards, intended to cooperate with a drive member situated outside or inside, is characterized in that:
• chaque mors possède une section rectangulaire, et est guidé dans une gorge de profil complémentaire ménagée dans le corps, • l'orientation de chaque mors est telle que sa face tournée vers l'intérieur est située dans un plan sensiblement tangent à un cercle centré sur l'axe du mandrin, • each jaw has a rectangular section, and is guided in a complementary profile groove in the body, The orientation of each jaw is such that its inward facing face is situated in a plane substantially tangential to a circle centered on the axis of the mandrel,
• chaque mors est positionné dans le corps de telle sorte que le plan médian longitudinal de sa face tournée vers l'intérieur est décalé par rapport à la ligne de contact sur un cercle centré sur l'axe du mandrin et représentatif de la queue d'un outil, de façon à réaliser un contact avec ce cercle au niveau d'une arête, dite arête active, délimitant cette face intérieure, et située en avant ou tangente dans le sens de serrage.Each jaw is positioned in the body so that the longitudinal median plane of its inward facing face is offset from the nip on a circle centered on the axis of the mandrel and representative of the tail of the mandrel. a tool, so as to make contact with this circle at an edge, said active edge, delimiting this inner face, and located forward or tangent in the clamping direction.
Chaque mors possédant une section rectangulaire peut être obtenu de_ façon simple, par exemple, par découpage d'une plaque métallique d'épaisseur adaptée, correspondant à l'épaisseur des mors. Il est également possible d'obtenir ce type de mors par des opérations simples telles que des opérations de forgeage.Each jaw having a rectangular section can be obtained in a simple manner, for example by cutting a metal plate of suitable thickness, corresponding to the thickness of the jaws. It is also possible to obtain this type of jaw by simple operations such as forging operations.
Il doit être noté que la forme rectangulaire des mors permet néanmoins un serrage selon des arêtes, le positionnement décalé des mors, comme précisé précédemment, permettant un contact avec la queue de l'outil suivant une arête dite arête active délimitant la face intérieure de chaque mors. Il peut être noté que s'il s'agit de serrer la queue d'un outil de forme hexagonale, les trois faces planes intérieures, prennent appui sur trois des six faces de l'outil et assurent un parfait serrage de celui-ci.It should be noted that the rectangular shape of the jaws nevertheless allows a clamping along the edges, the offset positioning of the jaws, as specified above, allowing contact with the tail of the tool along a so-called active edge edge delimiting the inner face of each bit. It may be noted that if it is a question of tightening the tail of a tool of hexagonal shape, the three inner planar faces, rest on three of the six faces of the tool and ensure a perfect tightening thereof.
Avantageusement, la face de chaque mors tournée vers l'intérieur, forme un angle de quelques degrés, du côté de l'extérieur, avec la tangente à un cercle centré sur l'axe du mandrin, passant par le point de contact entre l'arête active et ce cercle. Cette caractéristique assure le serrage d'une queue circulaire d'outil selon trois arêtes correspondant aux arêtes actives de la face intérieure des trois mors. Suivant une autre caractéristique avantageuse de l'invention, la denture de chaque mors est définie par des découpes comportant des parois perpendiculaires au plan longitudinal du mors.Advantageously, the face of each jaw turned inward, forms an angle of a few degrees, on the outside, with the tangent to a circle centered on the axis of the mandrel, passing through the point of contact between the active edge and this circle. This feature ensures the clamping of a circular tool shank along three edges corresponding to the active edges of the inner face of the three jaws. According to another advantageous characteristic of the invention, the toothing of each jaw is defined by cuts having walls perpendicular to the longitudinal plane of the jaw.
Cette caractéristique est avantageuse en ce sens que les dentures sont obtenues de façon simple, par simple coupe, et peuvent néanmoins engrener avec un filetage, ceci grâce au décalage de la position des mors, par rapport à une position dans laquelle le plan longitudinal de chaque mors passerait par l'axe du mandrin.This feature is advantageous in that the teeth are obtained in a simple manner, by simple cutting, and can nevertheless mesh with a thread, this thanks to the offset of the position of the jaws, by relative to a position in which the longitudinal plane of each jaw would pass through the axis of the mandrel.
Afin d'assurer la retenue de chaque mors à l'intérieur d'une cavité de forme rectangulaire du corps, chaque mors présente dans l'une au moins de ses faces latérales, au moins une gorge longitudinale, dans laquelle est destiné à être engagé au moins un plot faisant saillie de la face en regard de la paroi de la gorge dans laquelle est engagé et guidé le mors.In order to ensure the retention of each jaw inside a cavity of rectangular shape of the body, each jaw has in at least one of its lateral faces, at least one longitudinal groove, in which is intended to be engaged at least one stud projecting from the face facing the wall of the groove in which the jaw is engaged and guided.
Suivant une première possibilité, la denture de chaque mors est ménagée sur la face du mors tournée vers l'intérieur et coopère avec une tête centrale filetée avec un pas à gauche pour obtenir le déplacement des mors dans un sens ou dans l'autre selon le sens d'entraînement en rotation du corps et de la tête.According to a first possibility, the toothing of each jaw is formed on the face of the jaw turned inwards and cooperates with a central head threaded with a step to the left to obtain the movement of the jaws in one direction or the other according to the direction of rotation of the body and the head.
Suivant une autre possibilité, la denture de chaque mors est ménagée sur la face du mors tournée vers l'extérieur et coopère avec un écrou extérieur entraîné par une chemise montée pivotante sur le corps.According to another possibility, the toothing of each jaw is formed on the face of the jaw turned outwardly and cooperates with an outer nut driven by a casing pivotally mounted on the body.
De toute façon, l'invention sera bien comprise -à l'aide de la description qui suit, en référence au dessin schématique annexé, représentant, à titre d'exemple non limitatif, une forme d'exécution de ce mandrin.In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing, showing, by way of non-limiting example, an embodiment of this mandrel.
Figure 1 en est une vue en perspective, en position de serrage d'un outil dont la queue présente une section hexagonale ;Figure 1 is a perspective view in the clamping position of a tool whose tail has a hexagonal section;
Figure 2 est une vue de face du mandrin de figure 1 ;Figure 2 is a front view of the mandrel of Figure 1;
Figure 3 est une vue en perspective de deux mors de ce mandrin, en position de serrage du même outil, l'extérieur du mandrin ayant été arraché ; Figure 4 est une vue de face de ce mandrin en position de serrage d'un foret cylindrique ;Figure 3 is a perspective view of two jaws of the mandrel, in the clamping position of the same tool, the outside of the mandrel has been torn off; Figure 4 is a front view of the mandrel in the clamping position of a cylindrical drill;
Figure 5 en est une vue en coupe longitudinale, selon ligne V-V de figure 4.Figure 5 is a longitudinal sectional view, along line V-V of Figure 4.
Le mandrin représenté aux figures 1 à 5 comprend un corps 2 à l'intérieur duquel est montée une tête centrale 3 destinée à sa fixation sur l'arbre d'une machine tournante, cette tête centrale 3 comprenant dans sa partie avant un filetage extérieur 4. Ce mandrin est équipé d'une bague de maintien 5 solidaire de la tête centrale, ainsi que dans sa partie avant d'une bague de serrage 6. Le corps 2 comporte trois évidements longitudinaux de section rectangulaire, servant chacun au montage et au guidage d'un mors 7.The mandrel shown in Figures 1 to 5 comprises a body 2 inside which is mounted a central head 3 for attachment to the shaft of a rotating machine, the central head 3 comprising in its front part an external thread 4 This mandrel is equipped with a retaining ring 5 integral with the central head, as well as in its front part with a clamping ring 6. The body 2 has three longitudinal recesses of rectangular section, each serving for mounting and guiding of a bit 7.
De façon connue en soi, les cavités ménagées dans le corps 2 convergent vers l'avant, afin d'assurer le rapprochement des mors 7, lorsque ceux-ci sont déplacés axialement vers l'avant. Il doit être noté que chacun des mors possède une section rectangulaire, ce qui permet de l'obtenir de façon simple, par exemple, par découpage dans une plaque d'épaisseur déterminée. Chacun des mors possède, sur sa face tournée vers l'intérieur, une denture 8 obtenue par des découpes comportant des parois perpendiculaires au plan longitudinal des mors. Comme montré à la figure 3, chaque mors comporte dans l'une des faces latérales, une gorge longitudinale 9, dans laquelle est destinés à être engagé au moins un plot faisant saillie en regard de la paroi de la gorge dans laquelle est engagé et guidé le mors considéré.In a manner known per se, the cavities formed in the body 2 converge towards the front, to ensure the approximation of the jaws 7, when they are moved axially forward. It should be noted that each of the jaws has a rectangular section, which allows to obtain in a simple manner, for example, by cutting into a plate of predetermined thickness. Each of the jaws has, on its face turned inwards, toothing 8 obtained by cuts having walls perpendicular to the longitudinal plane of the jaws. As shown in FIG. 3, each jaw comprises, in one of the lateral faces, a longitudinal groove 9, in which is intended to be engaged at least one protruding stud facing the wall of the groove in which is engaged and guided the bit considered.
Comme cela ressort des figures 2 et 4, la face intérieure 10 de chaque mors est située dans un plan sensiblement tangent à un cercle 12 centré sur l'axe du mandrin.As is apparent from Figures 2 and 4, the inner face 10 of each jaw is located in a plane substantially tangential to a circle 12 centered on the axis of the mandrel.
En outre, chaque mors est positionné dans le corps de telle sorte que le plan médian longitudinal P de sa face 10 soit décalé par rapport à sa ligne de contact sur un cercle centré sur l'axe du mandrin et représentatif de la queue d'un outil. De cette façon, le contact avec le cercle est réalisé au niveau d'une arête 13 dite arête active, qui est située en avant ou tangente dans le sens de serrage de l'outil. Lorsque l'outil 14 possède une queue 15 de section hexagonale, comme montré aux figures 1 et 2, le serrage se fait par appui des trois faces intérieures 10 des mors, sur trois faces de la queue 15 de l'outil.In addition, each jaw is positioned in the body so that the longitudinal median plane P of its face 10 is offset relative to its line of contact on a circle centered on the axis of the mandrel and representative of the tail of a tool. In this way, the contact with the circle is made at an edge 13 called active edge, which is located forward or tangent in the clamping direction of the tool. When the tool 14 has a shank 15 of hexagonal section, as shown in Figures 1 and 2, the clamping is done by pressing the three inner faces 10 of the jaws on three sides of the shank 15 of the tool.
Dans le cas où l'outil est constitué par un foret 16 dont la queue 17 est cylindrique, comme montré aux figures 4 et 5, le serrage de la queue 17 est réalisé au niveau des trois arêtes actives 13 des trois mors. Comme il ressort de ce qui précède, l'invention apporte une grande amélioration à la technique existante, en fournissant un mandrin de structure simple, dans la mesure où les mors qu'il comprend peuvent être obtenus par des opérations mécaniques ou par des opérations de forgeage très simples et peu onéreuses. Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de mandrin comportant une tête centrale filetée avec un pas à gauche elle en embrasse au contraire toutes les variantes de réalisation. C'est ainsi notamment que la denture de chaque mors pourrait être ménagée sur la face du mors tourné vers l'extérieur et coopérer avec un écrou extérieur entraîné par une chemise montée pivotante sur le corps, sans que l'on sorte pour autant du cadre de l'invention. In the case where the tool is constituted by a drill 16 whose tail 17 is cylindrical, as shown in Figures 4 and 5, the clamping of the tail 17 is formed at the three active edges 13 of the three jaws. As is apparent from the foregoing, the invention provides a great improvement to the existing technique by providing a mandrel of simple structure, insofar as the jaws it comprises can be obtained by mechanical operations or by operations of forging very simple and inexpensive. It goes without saying that the invention is not limited to the single embodiment of mandrel comprising a threaded central head with a left-hand step, but embraces all the variants thereof. It is thus that the teeth of each jaw could be arranged on the face of the jaw turned outwardly and cooperate with an outer nut driven by a casing pivotally mounted on the body, without we go out of the frame of the invention.

Claims

REVENDICATIONS
1. Mandrin porte-outil pour l'équipement d'une machine tournante, du type comportant un corps (2) à l'intérieur duquel sont montés, guidés en translation, plusieurs mors (7) qui convergent vers l'avant pour réaliser le serrage d'un outil (16), chaque mors comportant une denture (8) tournée vers l'extérieur ou vers l'intérieur, destinée à coopérer avec un organe d'entraînement (3) situé à l'extérieur ou à l'intérieur, caractérisé en ce que:1. A tool chuck for the equipment of a rotating machine, of the type comprising a body (2) inside which are mounted, guided in translation, a plurality of jaws (7) converging towards the front to realize the clamping a tool (16), each jaw having teeth (8) facing outwards or inwards, intended to cooperate with a drive member (3) located outside or inside characterized in that
• chaque mors (7) possède une section rectangulaire, et est guidé dans une gorge de profil complémentaire ménagée dans le corps,Each jaw (7) has a rectangular section, and is guided in a groove of complementary profile formed in the body,
• l'orientation de chaque mors (7) est telle que sa face (10) tournée vers l'intérieur est située dans un plan sensiblement tangent à un cercle (12) centré sur l'axe du mandrin, • chaque mors (7) est positionné dans le corps-de teHe sorte que le plan médian longitudinal (P) de sa face (10) tournée vers l'intérieur est décile par rapport à la ligne de contact sur un cercle (12) centré sur l'axe du mandrjn et représentatif de la queue d'un outil, de façon à réaliser un contact avec ce cercle au niveau d'une arête (13), dite arête active, délimitant cette face intérieure (10), et située en avant ou tangente dans le sens de serrage. • the orientation of each jaw (7) is such that its face (10) turned towards the inside is situated in a plane substantially tangent to a circle (12) centered on the axis of the mandrel, • each jaw (7) is positioned in the body-body so that the longitudinal median plane (P) of its face (10) facing inwards is decile with respect to the line of contact on a circle (12) centered on the axis of the mandrel and representative of the tail of a tool, so as to make contact with this circle at an edge (13), said active edge, delimiting this inner face (10), and located forward or tangent in the direction Clamping.
2. Mandrin selon la revendication 1 , caractérisé en ce que la face (10) de chaque mors tournée vers l'intérieur, forme un angle de quelques degrés, du côté de l'extérieur, avec la tangente à un cercle (12) centré sur l'axe du mandrin, passant par le point de contact entre l'arête active (13) et ce cercle.2. mandrel according to claim 1, characterized in that the face (10) of each jaw turned inward, forms an angle of a few degrees, on the outside, with the tangent to a circle (12) centered on the axis of the mandrel, passing through the point of contact between the active edge (13) and this circle.
3. Mandrin selon l'une des revendications 1 et 2, caractérisé en ce que la denture (8) de chaque mors (7) est définie par des découpes comportant des parois perpendiculaires au plan longitudinal du mors.3. mandrel according to one of claims 1 and 2, characterized in that the toothing (8) of each jaw (7) is defined by cuts having walls perpendicular to the longitudinal plane of the jaw.
4. Mandrin selon l'une des revendications 1 à 3, caractérisé en ce que chaque mors (7) présente dans l'une au moins de ses faces latérales, au moins une gorge longitudinale (9), dans laquelle est destiné à être engagé au moins un plot faisant saillie de la face en regard de la paroi de la gorge dans laquelle est engagé et guidé le mors. 4. mandrel according to one of claims 1 to 3, characterized in that each jaw (7) has in at least one of its lateral faces, at least one longitudinal groove (9), in which is intended to be engaged at least one stud projecting from the face facing the wall of the groove in which the jaw is engaged and guided.
5. Mandrin selon l'une des revendications 1 à 4, caractérisé en ce que la denture (8) de chaque mors est ménagée sur la face du mors tournée vers l'intérieur et coopère avec une tête centrale filetée (3) avec un pas à gauche pour obtenir le déplacement des mors (7) dans un sens ou dans l'autre selon le sens d'entraînement en rotation du corps et de la tête.5. mandrel according to one of claims 1 to 4, characterized in that the toothing (8) of each jaw is formed on the face of the jaw turned inwardly and cooperates with a central threaded head (3) with a step left to obtain the movement of the jaws (7) in one direction or the other in the direction of rotation of the body and the head.
6. Mandrin selon l'une des revendications I à 4, caractérisé en ce que la denture de chaque mors est ménagée sur la face du mors tournée vers l'extérieur et coopère avec un écrou extérieur entraîné par une chemise montée pivotante sur le corps. 6. Mandrel according to one of claims I to 4, characterized in that the teeth of each jaw is formed on the face of the jaw turned outwardly and cooperates with an outer nut driven by a casing pivotally mounted on the body.
EP06743587A 2005-03-16 2006-03-16 Tool-holder mandrel for equipping a rotating machine Withdrawn EP1858665A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0502588A FR2883209B1 (en) 2005-03-16 2005-03-16 TOOL HOLDER CHUCK FOR THE EQUIPMENT OF A ROTATING MACHINE
PCT/FR2006/000589 WO2006097637A1 (en) 2005-03-16 2006-03-16 Tool-holder mandrel for equipping a rotating machine

Publications (1)

Publication Number Publication Date
EP1858665A1 true EP1858665A1 (en) 2007-11-28

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EP06743587A Withdrawn EP1858665A1 (en) 2005-03-16 2006-03-16 Tool-holder mandrel for equipping a rotating machine

Country Status (6)

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US (1) US20090140500A1 (en)
EP (1) EP1858665A1 (en)
JP (1) JP2008532785A (en)
CN (1) CN101189091A (en)
FR (1) FR2883209B1 (en)
WO (1) WO2006097637A1 (en)

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EP2960376A1 (en) * 2014-06-27 2015-12-30 Caterpillar Work Tools B. V. Method of decoupling a cylinder from a jaw in a demolition tool and link assembly thereof

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Also Published As

Publication number Publication date
FR2883209A1 (en) 2006-09-22
WO2006097637A1 (en) 2006-09-21
CN101189091A (en) 2008-05-28
FR2883209B1 (en) 2007-05-11
JP2008532785A (en) 2008-08-21
US20090140500A1 (en) 2009-06-04

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