FR2622945A1 - Disengageable drive mechanism for a rotating ring gear - Google Patents
Disengageable drive mechanism for a rotating ring gear Download PDFInfo
- Publication number
- FR2622945A1 FR2622945A1 FR8715747A FR8715747A FR2622945A1 FR 2622945 A1 FR2622945 A1 FR 2622945A1 FR 8715747 A FR8715747 A FR 8715747A FR 8715747 A FR8715747 A FR 8715747A FR 2622945 A1 FR2622945 A1 FR 2622945A1
- Authority
- FR
- France
- Prior art keywords
- crown
- lever
- mechanism according
- drive mechanism
- load
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
- B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
- B23Q1/52—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism a single rotating pair
- B23Q1/522—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism a single rotating pair which is perpendicular to the working surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
- B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
- B23Q5/385—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously using a gear and rack mechanism or a friction wheel co-operating with a rail
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
Mécanisme d'entraînement debrayable pour couronne tournante
L'invention concerne un mécanisme d'entraînement débrayable pour couronne tournante entraînée par un mécanisme pas-à- pas.Disengageable drive mechanism for rotating crown
The invention relates to a disengageable drive mechanism for a rotating crown driven by a step-by-step mechanism.
De telles couronnes sont utilisées par exemple dans des mécanismes de transfert et nécessitent en général un positionnement précis dans diverses positions angulaires in dexées. Les mécanismes de débrayage connus sont compliqués, parfois peu fiables, et entraînent des coût de fabrication et d'entretien élevés. Les pièces et posages entraînés par les couronnes tournantes sont de plus très fragiles desorte que les surcharges auxquelles elles peuvent être soumises risquent d'entraîner un endommagement si la couronne n'est pas arrêtée dès l'apparition d'une telle surcharge. Les dispositifs de débrayage connus, lies à la détection des surcharges, sont eux aussi compliqués, onéreux et souvent peu fiables.Such crowns are used, for example, in transfer mechanisms and generally require precise positioning in various in-dexxed angular positions. Known declutching mechanisms are complicated, sometimes unreliable, and involve high manufacturing and maintenance costs. The parts and fittings entrained by the rotating crowns are moreover very fragile so that the overloads to which they can be subjected risk causing damage if the crown is not stopped as soon as such an overload occurs. The known declutching devices, linked to the detection of overloads, are also complicated, expensive and often unreliable.
La présente invention vise à obtenir un dispositif d'entraînement pour couronne tournante qui permette un indexage extrèmement précis et qui assure en outre un débrayage immédiat de l'entraînement lors de l'apparition d'une surcharge sur la couronne.The present invention aims to obtain a drive device for a rotating crown which allows extremely precise indexing and which also ensures immediate disengagement of the drive when an overload appears on the crown.
A cet effet, le dispositif selon l'invention est caractérise par le fait que ledit mécanisme d'entraînement pas-à-pas est monté sur un levier pivotant autour d'un axe parallèle à l'axe de pivotement de la couronne, ledit levier étant soumis à une charge d'application du mécanisme d'entraînement pas-à-pas contre la couronne. Avantageusement, le mécanisme d'avancement pas-à-pas comprend un pignon en prise avec une denture de la couronne. To this end, the device according to the invention is characterized in that said step-by-step drive mechanism is mounted on a lever pivoting about an axis parallel to the pivot axis of the crown, said lever being subjected to an application load of the step-by-step drive mechanism against the crown. Advantageously, the step-by-step advancement mechanism comprises a pinion engaged with a toothing of the crown.
La poussée sous charge d'une dent du pignon dans un creux de dent de la couronne assure un indexage précis alors que le pivotement du bras, contre l'effet de la charge, dans le cas de l'apparition d'une surcharge du couple d'entraînement (par exemple lors d'un blocage intempestif de la couronne tournante), produit un débrayage immédiat de l'entraînement, la dent menante échappant de la dent menée.The thrust under load of a tooth of the pinion in a hollow of the crown tooth ensures precise indexing while the pivoting of the arm, against the effect of the load, in the event of the appearance of a torque overload drive (for example during an untimely blocking of the rotating crown), produces an immediate disengagement of the drive, the driving tooth escaping from the driven tooth.
Afin d'éviter le frottement des sommets de dents au moment du débrayage qui serait dû à l'inertie d'arrêt du mécanisme d'entraînement, l'invention prévoit, selon une forme de réalisation préférée, que la charge est formée par un dispositif d'application bistable. En cas d'apparition d'une surcharge, la charge est-entraînée en une seconde position stable correspondant au débrayage complet du pignon menant.In order to avoid friction of the tops of the teeth at the time of disengagement which would be due to the inertia of stopping of the drive mechanism, the invention provides, according to a preferred embodiment, that the load is formed by a device bistable application. In the event of an overload, the load is driven into a second stable position corresponding to the complete disengagement of the driving pinion.
Dans ce cas, le dispositif d'application bistable doit comporter un moyen de passage de la position de débrayage à la position d'embrayage. Avantageusement, en outre, le mécanisme d'application bistable comporte un moyen de passage de la position d'embrayage à la position de débrayage, ce qui permet de débrayer la commande de la couronne pour toute opération de contrôle, d'entretien, de montage ou de démontage nécessitant un entraînement manuel de la couronne.In this case, the bistable application device must include means for passing from the disengaged position to the clutch position. Advantageously, moreover, the bistable application mechanism comprises a means for passing from the clutch position to the disengage position, which makes it possible to disengage the control of the crown for any control, maintenance or mounting operation. or disassembly requiring manual drive of the crown.
Les moyens de passage d'une position à l'autre du dispositif d'application de charge peuvent être mécaniques à commande manuelle, mécaniques à commande pneumatique ou électrique, ou bien purement pneumatiques ou électriques.The means for passing from one position to the other of the load application device may be mechanical with manual control, mechanical with pneumatic or electric control, or else purely pneumatic or electric.
L'invention sera bien comprise à la lecture de la description suivante faite en se référant au dessin annexé dans lequel: - la figure 1 est une vue schématique en perspective et coupe partielle d'une portion de couronne et d'un mécanisme d'entraînement selon un exemple de réalisation de l'invention; - la figure 2 est une vue en plan de l'ensemble de la figure 1; - la figure 3 est une vue en coupe selon la ligne III-III de la figure 2; - la figure 4 est analogue à la figure 1, pour une variante - la figure 5 est analogue à la figure 2, pour la variante de la figure 4; - la figure 6 est analogue à la figure 5, pour la position débrayée du mécanisme; - les figures 7 et 8 sont analogues respectivement aux figures 5 et 6, mais pour une autre variante, et - les figures 9 et 10 sont également analogues respectivement aux figures 5 et 6, mais pour encore une autre variante.The invention will be clearly understood on reading the following description made with reference to the accompanying drawing in which: - Figure 1 is a schematic perspective view and partial section of a portion of the crown and of a drive mechanism according to an exemplary embodiment of the invention; - Figure 2 is a plan view of the assembly of Figure 1; - Figure 3 is a sectional view along line III-III of Figure 2; - Figure 4 is similar to Figure 1, for a variant - Figure 5 is similar to Figure 2, for the variant of Figure 4; - Figure 6 is similar to Figure 5, for the disengaged position of the mechanism; - Figures 7 and 8 are respectively similar to Figures 5 and 6, but for another variant, and - Figures 9 and 10 are also similar to Figures 5 and 6 respectively, but for yet another variant.
Dans tous les exemples décrits, l'entraînement de la couronne est effectué au moyen d'un pignon moteur. Tout mécanisme d'entraînement pas-à-pas connu, tel que croix de
Malte, came globoîde, moteur pas-à-pas, etc., peut être utilisé pour la motorisation du pignon.In all the examples described, the drive of the crown is carried out by means of a motor pinion. Any known step-by-step drive mechanism, such as a cross
Malta, globoid cam, stepper motor, etc., can be used for motorizing the pinion.
On se réfère tout d'abord aux figures 1 à 3 qui illustrent un premier exemple de réalisation de l'invention.We first refer to Figures 1 to 3 which illustrate a first embodiment of the invention.
Une couronne 1 menée en rotation sur un bâti 2 comporte une denture 3 en prise avec un pignon moteur 4. Dans l'exemple représenté, la denture 3 est intérieure.Le pignon 4 est monté sur un levier 5 pivotant autour d'un axe 6 parallèle à l'axe du pignon moteur 4 et à l'axe de la couronne 1. Un ressort de compression 7, hélicoldal dans l'exemple représenté, dont une extrémité est en appui sur une butée 8 et l'autre extrémité est en appui sur le levier 5, forme une charge d'application du pignon 4 contre la denture 3 de la couronne 1.A crown 1 driven in rotation on a frame 2 has a toothing 3 engaged with a driving pinion 4. In the example shown, the toothing 3 is internal. The pinion 4 is mounted on a lever 5 pivoting about an axis 6 parallel to the axis of the drive pinion 4 and to the axis of the crown 1. A compression spring 7, helical in the example shown, one end of which is supported on a stop 8 and the other end is supported on the lever 5, forms an application load of the pinion 4 against the teeth 3 of the crown 1.
A l'arrêt, la charge d'application constituée par le ressort 7 assure un positionnement précis d'une dent du pignon 4 dans un creux de la denture 3 ou inversement. En rotation, en cas de surcharge, la dent menante est repoussée par rapport à la dent menée, le levier 5 s'écartant de la denture 3 contre l'action du ressort 7, sans risque d'endommagement.When stopped, the application load constituted by the spring 7 ensures precise positioning of a tooth of the pinion 4 in a hollow of the toothing 3 or vice versa. In rotation, in the event of an overload, the driving tooth is pushed back relative to the driven tooth, the lever 5 moving away from the teeth 3 against the action of the spring 7, without risk of damage.
On se réfère maintenant aux figures 4 à 6 qui décrivent une première variante de l'invention. Les mêmes références 1 à 6 désignent les mêmes éléments que dans l'exemple des figures 1 à 3. Dans cette forme de réalisation, le levier 5 est soumis à la force d'un dispositif à genouillère constitué par un levier 9 pivotant autour d'un axe fixe 10. Une extrémité du levier 9 est articulée autour d'un axe 11 sur le levier 5 alors que son autre extrémité 12 est reliée à un ressort hélicoîdal 13.We now refer to Figures 4 to 6 which describe a first variant of the invention. The same references 1 to 6 designate the same elements as in the example of FIGS. 1 to 3. In this embodiment, the lever 5 is subjected to the force of a toggle device constituted by a lever 9 pivoting around a fixed axis 10. One end of the lever 9 is articulated around an axis 11 on the lever 5 while its other end 12 is connected to a helical spring 13.
En fonctionnement normal (figure 5), le ressort 13 tend à faire pivoter le levier 9 dans le sens des aiguilles d'une montre (sur le dessins, ce qui fournit la force d'application du pignon 4 contre la denture 3 de la couronne 1. En cas d'apparition d'une surcharge, le pignon 4 tend à s'écarter de la couronne 1 en faisant pivoter le levier 9 dans le sens inverse des aiguilles d'une montre (sur le dessin). Dès que ce mouvement a atteint une amplitude suffisante, le ressort 13 vient dans l'alignement du levier 9 et, immédiatement après, le ressort 13 produit une rotation supplémentaire du levier 9 qui amène le pignon 4 hors de prise de la denture 3 (figure 6). La remise en prise du pignon 4 avec la denture 3 doit être faite volontairement, mécaniquement dans l'exemple des figures 4 à 6, après annulation de la cause de surcharge. In normal operation (Figure 5), the spring 13 tends to rotate the lever 9 clockwise (in the drawings, which provides the force for applying the pinion 4 against the teeth 3 of the crown 1. If an overload occurs, the pinion 4 tends to move away from the crown 1 by turning the lever 9 anticlockwise (in the drawing). has reached a sufficient amplitude, the spring 13 comes into alignment with the lever 9 and, immediately after, the spring 13 produces an additional rotation of the lever 9 which brings the pinion 4 out of engagement of the toothing 3 (FIG. 6). re-engagement of the pinion 4 with the toothing 3 must be done voluntarily, mechanically in the example of FIGS. 4 to 6, after cancellation of the cause of overload.
Dans la forme de réalisation des figures 7 et 8, un bras 14 assure la remise en prise. Le bras 14 peut être la tige du piston d'un vérin ou la tige d'un actionneur électrique. Le bras 14 peut éventuellement être commandé dans les deux sens pour permettre un débrayage.In the embodiment of Figures 7 and 8, an arm 14 ensures the engagement. The arm 14 can be the piston rod of a jack or the rod of an electric actuator. The arm 14 can optionally be controlled in both directions to allow disengagement.
Dans l'exemple de réalisation des figures 9 et 10, le levier 5 est articulé directement à une extrémité de la tige 15 d'un vérin à double effet qui constitue la force-d'application du pignon 4 sur la denture 3 de la couronne 1, tout en permettant de commander le débrayage et l'embrayage.In the embodiment of Figures 9 and 10, the lever 5 is articulated directly at one end of the rod 15 of a double-acting cylinder which constitutes the force-application of the pinion 4 on the teeth 3 of the crown 1, while allowing the clutch and clutch to be controlled.
Dans tous les cas, l'embrayage doit être fait par une action délibérée de l'utilisateur, ce qui évite des risques d'embrayage involontaire. In all cases, the clutch must be made by deliberate action by the user, which avoids risks of unintentional clutching.
Le dispositif selon l'invention, en plus des avantages qu'il présente, est économique. Il remplace en effet, dans un mécanisme classique, un indexage, un rupteur de surcharge et un débrayage manuel ou commandé.The device according to the invention, in addition to the advantages which it presents, is economical. It replaces in fact, in a conventional mechanism, indexing, an overload switch and a manual or controlled declutching.
On notera que l'axe de pivotement 6 du levier 5 est positionné dans un plan tangent à la denture 3 de la couronne 1 au point d'engrènement avec le-pignon 4. On augmente ainsi l'efficacité du débrayage de sécurité selon le profil en développante de cercle de la denture. It will be noted that the pivot axis 6 of the lever 5 is positioned in a plane tangent to the toothing 3 of the crown 1 at the point of engagement with the pinion 4. This thus increases the efficiency of the safety declutching according to the profile. developing in circle of the teeth.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8715747A FR2622945B1 (en) | 1987-11-06 | 1987-11-06 | RELEASABLE DRIVE MECHANISM FOR A ROTATING CROWN |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8715747A FR2622945B1 (en) | 1987-11-06 | 1987-11-06 | RELEASABLE DRIVE MECHANISM FOR A ROTATING CROWN |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2622945A1 true FR2622945A1 (en) | 1989-05-12 |
FR2622945B1 FR2622945B1 (en) | 1990-02-23 |
Family
ID=9356785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8715747A Expired - Lifetime FR2622945B1 (en) | 1987-11-06 | 1987-11-06 | RELEASABLE DRIVE MECHANISM FOR A ROTATING CROWN |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2622945B1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0492195A1 (en) * | 1990-12-13 | 1992-07-01 | Claas Ohg | Forage harvester |
FR2681810A1 (en) * | 1991-09-27 | 1993-04-02 | Laurencot Sa | Installation for automatic nailing of wooden structures such as handling pallets |
EP1151653A1 (en) * | 2000-05-04 | 2001-11-07 | Maschinenfabrik Bernard Krone GmbH | Harvester especially self-propelled forage harvester |
EP1287731A1 (en) * | 2001-08-25 | 2003-03-05 | Deere & Company | Drive mechanism for a discharge means of an agricultural harvester |
ES2310088A1 (en) * | 2006-04-26 | 2008-12-16 | Construcciones Para Ferias Y Parques De Atracciones S.A. | Rotating galeon for fair attractions (Machine-translation by Google Translate, not legally binding) |
WO2009144063A1 (en) * | 2008-05-26 | 2009-12-03 | Iht Automation Gmbh & Co. Kg | Drive apparatus having a force transmission means which can be moved by gravitational force |
ITUD20090173A1 (en) * | 2009-10-02 | 2011-04-03 | D D S R L | MECHANISM OF MOVEMENT AND SOLAR PLANT USING THIS MECHANISM |
CN103962871A (en) * | 2014-05-13 | 2014-08-06 | 苏州亘富机械科技有限公司 | Annular driving system for pipe cutter |
EP2829334A1 (en) * | 2013-07-25 | 2015-01-28 | TRUMPF Werkzeugmaschinen GmbH + Co. KG | Drive device for a motion unit of a machine tool and machine tool with such a drive device |
EP2415341A3 (en) * | 2010-08-02 | 2015-03-04 | CLAAS Selbstfahrende Erntemaschinen GmbH | Drive for an excess load device of an agricultural harvester |
CN109108709A (en) * | 2018-08-20 | 2019-01-01 | 东莞市松研智达工业设计有限公司 | Driving mechanism with adjustable gap and low abrasion |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL74953C (en) * | ||||
FR990335A (en) * | 1948-06-01 | 1951-09-20 | United Machine Tools Factories | Device for automatically stopping a movement under the action of a stop, in particular for the feed mechanism of machine tools |
FR1160123A (en) * | 1956-10-29 | 1958-07-08 | Device for intermittent drive of a shaft from a continuous rotational movement | |
CH425387A (en) * | 1965-06-21 | 1966-11-30 | Durand Francois | Transmission device |
CH466673A (en) * | 1966-02-17 | 1968-12-15 | Francois De Valliere Pierre | Automatic release device for machine tool |
-
1987
- 1987-11-06 FR FR8715747A patent/FR2622945B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL74953C (en) * | ||||
FR990335A (en) * | 1948-06-01 | 1951-09-20 | United Machine Tools Factories | Device for automatically stopping a movement under the action of a stop, in particular for the feed mechanism of machine tools |
FR1160123A (en) * | 1956-10-29 | 1958-07-08 | Device for intermittent drive of a shaft from a continuous rotational movement | |
CH425387A (en) * | 1965-06-21 | 1966-11-30 | Durand Francois | Transmission device |
CH466673A (en) * | 1966-02-17 | 1968-12-15 | Francois De Valliere Pierre | Automatic release device for machine tool |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0492195A1 (en) * | 1990-12-13 | 1992-07-01 | Claas Ohg | Forage harvester |
FR2681810A1 (en) * | 1991-09-27 | 1993-04-02 | Laurencot Sa | Installation for automatic nailing of wooden structures such as handling pallets |
EP1151653A1 (en) * | 2000-05-04 | 2001-11-07 | Maschinenfabrik Bernard Krone GmbH | Harvester especially self-propelled forage harvester |
DE10021660A1 (en) * | 2000-05-04 | 2001-11-15 | Krone Bernhard Gmbh Maschf | Harvester, especially self-propelled forage harvesters |
DE10021660C2 (en) * | 2000-05-04 | 2002-07-04 | Krone Bernhard Gmbh Maschf | Harvester, especially self-propelled forage harvesters |
EP1287731A1 (en) * | 2001-08-25 | 2003-03-05 | Deere & Company | Drive mechanism for a discharge means of an agricultural harvester |
US6718746B2 (en) | 2001-08-25 | 2004-04-13 | Deere & Company | Drive arrangement for ensilage harvester discharge spout |
ES2310088A1 (en) * | 2006-04-26 | 2008-12-16 | Construcciones Para Ferias Y Parques De Atracciones S.A. | Rotating galeon for fair attractions (Machine-translation by Google Translate, not legally binding) |
WO2009144063A1 (en) * | 2008-05-26 | 2009-12-03 | Iht Automation Gmbh & Co. Kg | Drive apparatus having a force transmission means which can be moved by gravitational force |
US8746665B2 (en) | 2008-05-26 | 2014-06-10 | Iht Automation Gmbh & Co. Kg | Drive apparatus having a force transmission means that can be moved by gravitational force |
ITUD20090173A1 (en) * | 2009-10-02 | 2011-04-03 | D D S R L | MECHANISM OF MOVEMENT AND SOLAR PLANT USING THIS MECHANISM |
WO2011039011A3 (en) * | 2009-10-02 | 2011-05-26 | D.D. Srl | Movement mechanism and solar plant using said mechanism |
US9217585B2 (en) | 2009-10-02 | 2015-12-22 | D.D. Srl | Movement mechanism and solar plant using said mechanism |
EP2415341A3 (en) * | 2010-08-02 | 2015-03-04 | CLAAS Selbstfahrende Erntemaschinen GmbH | Drive for an excess load device of an agricultural harvester |
EP2829334A1 (en) * | 2013-07-25 | 2015-01-28 | TRUMPF Werkzeugmaschinen GmbH + Co. KG | Drive device for a motion unit of a machine tool and machine tool with such a drive device |
US9541176B2 (en) | 2013-07-25 | 2017-01-10 | Trumpf Werkzeugmaschinen Gmbh + Co. Kg | Drive devices for movement units of machine tools and related machine tools |
CN103962871A (en) * | 2014-05-13 | 2014-08-06 | 苏州亘富机械科技有限公司 | Annular driving system for pipe cutter |
CN109108709A (en) * | 2018-08-20 | 2019-01-01 | 东莞市松研智达工业设计有限公司 | Driving mechanism with adjustable gap and low abrasion |
Also Published As
Publication number | Publication date |
---|---|
FR2622945B1 (en) | 1990-02-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |
Effective date: 20060731 |
|
RN | Application for restoration | ||
FC | Favourable decision of inpi director general on an application for restauration. |