FR2809789A1 - RECIRCULATING SCREWS FOR ROLLING ORGANS - Google Patents
RECIRCULATING SCREWS FOR ROLLING ORGANS Download PDFInfo
- Publication number
- FR2809789A1 FR2809789A1 FR0006937A FR0006937A FR2809789A1 FR 2809789 A1 FR2809789 A1 FR 2809789A1 FR 0006937 A FR0006937 A FR 0006937A FR 0006937 A FR0006937 A FR 0006937A FR 2809789 A1 FR2809789 A1 FR 2809789A1
- Authority
- FR
- France
- Prior art keywords
- rollers
- screw
- cage
- screws
- nut
- 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
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/50—Cages for rollers or needles formed of interconnected members, e.g. chains
- F16C33/506—Cages for rollers or needles formed of interconnected members, e.g. chains formed as a flexible belt
-
- 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
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
-
- 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
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
- F16H2025/2271—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers with means for guiding circulating rollers
Abstract
Description
Vis à recirculation d'organes roulants La présente invention concerne une vis à recirculation d'organes roulants, du type comportant une vis et un écrou entre les filetages coopérants desquels circulent des organes roulants maintenus une cage, les organes roulants et la cage étant ramenés en permanence entre les filetages par un passage de recirculation. The present invention relates to a recirculating screw for rolling elements, of the type comprising a screw and a nut between the cooperating threads from which circulating rolling elements are held in a cage, the rolling elements and the cage being brought back in permanence between threads by a recirculation passage.
domaine des vis à billes (c'est-à-dire où ledit organe roulant est une bille) est aujourd'hui bien connu et utilisé largement dans l'industrie lorsqu'on veut transformer un mouvement de rotation en translation avec un rendement de l'ordre de 95%. Les applications sont multiples dans les machines-outils pour déplacer les axes, dans l'aéronautique pour mouvoir des surfaces assurant le pilotage de l'avion, dans les missiles, dans les satellites etc. field of ball screws (that is to say where said rolling member is a ball) is today well known and widely used in the industry when one wants to transform a rotational movement into translation with a yield of l 95%. There are many applications in machine tools to move axes, in aeronautics to move surfaces providing piloting of aircraft, in missiles, in satellites, etc.
L'utilisation de la vis à billes trouve parfois ses limites dans le cas où les charges à transmettre sont importantes et on peut les remplacer par des vis à rouleaux, comme connu par exemple par les documents 3884090 et FR 26996333. Alors que dans une vis à billes, la charge est transmise de l'écrou ' la vis par l'intermédiaire de chaque bille, avec une surface de contact 'duite, dans les vis à rouleaux, la charge est transmise de l'écrou à la vis l'intermédiaire des surfaces bombées des rouleaux, ce qui augmente considérablement la surface de contact. Les rouleaux ont des filets multiples et sont utilisés suivant deux principes de fonctionnement connus, soit par rouleaux satellites (avec des rouleaux filetés), soit par rouleaux recyclés (avec des rouleaux à gorges). Le rendement des vis à rouleaux est cependant moins bon que celui des vis à billes. The use of the ball screw sometimes finds its limits in the case where the loads to be transmitted are large and can be replaced by roller screws, as known for example from documents 3884090 and FR 26996333. Whereas in a screw ball, the load is transmitted from the nut 'the screw via each ball, with a contact surface' pick, in roller screws, the load is transmitted from the nut to the screw via curved surfaces of the rollers, which considerably increases the contact surface. The rollers have multiple threads and are used according to two known operating principles, either by satellite rollers (with threaded rollers) or by recycled rollers (with grooved rollers). However, the performance of roller screws is worse than that of ball screws.
La présente invention a pour but de proposer une nouvelle vis à recirculation d'organes roulants, qui ne présente pas les limitations et les inconvénients précités. The object of the present invention is to propose a new recirculating screw for rolling members, which does not have the aforementioned limitations and drawbacks.
L'invention atteint son but grâce à une vis à recirculation d'organes roulants dans laquelle lesdits organes sont des galets maintenus dans la cage de recirculation. The invention achieves its object by means of a recirculating screw for rolling members in which said members are rollers held in the recirculation cage.
profil de la vis et de l'écrou sont conjugués (droits ou légèrement creux) de façon à permettre le roulement des galets entre la vis et l'écrou. Les galets sont avantageusement disposés alternativement à 90 les uns par rapport autres de façon à pouvoir supporter des charges axiales changeant sens. Cependant, en fonction des charges subies par la vis et l'écrou, cette alternance peut être égale (1/1), ou inégale (1/2, 1/3, etc.), voire tous les galets dans le même sens. profile of the screw and the nut are combined (straight or slightly hollow) so as to allow the rollers to roll between the screw and the nut. The rollers are advantageously arranged alternately at 90 relative to each other so as to be able to support axial loads changing direction. However, depending on the loads undergone by the screw and the nut, this alternation can be equal (1/1), or unequal (1/2, 1/3, etc.), or even all the rollers in the same direction.
Les galets peuvent être cylindriques ou légèrement bombés. Ils sont en acier, notamment inoxydable, en céramique, en matière plastique, ou en toute autre matière connue pour les roulements. Ils peuvent être revêtus ou non, auto-lubrifiés ou non. The rollers can be cylindrical or slightly curved. They are made of steel, especially stainless steel, ceramic, plastic, or any other material known for bearings. They can be coated or not, self-lubricated or not.
La cage de recirculation peut être en matière souple (par exemple en plastique) ou en maillons articulés entre eux. Elle peut être réalisée dans une matière auto-lubrifiée ou non. The recirculation cage can be made of flexible material (for example plastic) or of links hinged together. It can be made of a self-lubricating material or not.
En combinant le diamètre des galets par rapport au diamètre de la vis, on peut optimiser le rendement du système en réduisant les frottements au point de contact. Par contre, la surface de galets en contact peut être supérieure à la surface de contact d'une vis à rouleaux, ce a pour effet d'avoir meilleure capacité de charge. By combining the diameter of the rollers with respect to the diameter of the screw, the efficiency of the system can be optimized by reducing friction at the point of contact. On the other hand, the surface of rollers in contact can be greater than the contact surface of a roller screw, this has the effect of having better load capacity.
Ainsi, la vis à galets de l'invention permet-elle d'obtenir une capacité de charge égale ou supérieure aux vis à rouleaux, un encombrement réduit par rapport aux vis à rouleaux dont l'écrou a un diamètre volumineux, une résistance flambage égale ou supérieure aux vis à rouleaux et un rendement identique ou voisin de celui des vis à billes. Thus, the roller screw of the invention allows it to obtain a load capacity equal to or greater than roller screws, a reduced size compared to roller screws whose nut has a large diameter, equal buckling resistance. or higher than roller screws and a performance identical to or close to that of ball screws.
L'invention sera mieux comprise et d'autres avantages et caractéristiques seront mis en évidence à la lecture description suivante, 'férant aux dessins annexés sur lesquels - figure 1 est une vue en perspective schématique d'une vis à galets conforme à l'invention ; - figure 2 est une vue plus détaillée de la vis figure 1, sans l'écrou ; - figure 3 est une coupe partielle longitudinale faite à l'interface ' -écrou de la vis à galets de l'invention. The invention will be better understood and other advantages and characteristics will be highlighted on reading the following description, referring to the accompanying drawings in which - Figure 1 is a schematic perspective view of a roller screw according to the invention ; - Figure 2 is a more detailed view of the screw in Figure 1, without the nut; - Figure 3 is a partial longitudinal section made at the interface-nut of the roller screw of the invention.
figures montrent une vis 1 à filetage hélicoïdal coopérant avec un écrou 3 lui-même pourvu d'un filetage hélicoïdal 4. Les filetages 2 et 4 ont une section triangulaire, comme représenté sur les figures 2 et 3, de sorte que les filetages 2 et 4 de la vis 1 et de l'écrou 3, en vis-à-vis, définissent entre eux un espace hélicoïdal de section sensiblement carrée, dans lequel passe un train de galets 5 maintenus entre eux à un écartement convenable par une cage de recirculation 6. Celle ' présente deux ailes 7 passant latéralement le long des galets. La cage 6 les galets 5 après être passés entre la vis 1 et l'écrou 3 le long d'un trajet hélicoïdal sont renvoyés en tête de ce trajet par un passage de recirculation 8 du type bien connu pour les vis à billes. Figures show a screw 1 with helical thread cooperating with a nut 3 itself provided with a helical thread 4. The threads 2 and 4 have a triangular section, as shown in Figures 2 and 3, so that the threads 2 and 4 of the screw 1 and the nut 3, facing each other, define between them a helical space of substantially square section, through which passes a train of rollers 5 held together at a suitable spacing by a recirculation cage 6. Celle 'has two wings 7 passing laterally along the rollers. The cage 6 the rollers 5 after passing between the screw 1 and the nut 3 along a helical path are returned to the head of this path by a recirculation passage 8 of the type well known for ball screws.
Les galets 5, pourvus de chanfreins 9, peuvent avoir leurs axes 10 parallèles comme représenté figure 3 ou alternés comme représenté figure 2.The rollers 5, provided with chamfers 9, can have their axes 10 parallel as shown in FIG. 3 or alternating as shown in FIG. 2.
Claims (4)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0006937A FR2809789B1 (en) | 2000-05-30 | 2000-05-30 | RECIRCULATING SCREWS FOR ROLLING ORGANS |
PCT/FR2001/001494 WO2001092762A1 (en) | 2000-05-30 | 2001-05-16 | Roller-screw mechanism for rolling elements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0006937A FR2809789B1 (en) | 2000-05-30 | 2000-05-30 | RECIRCULATING SCREWS FOR ROLLING ORGANS |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2809789A1 true FR2809789A1 (en) | 2001-12-07 |
FR2809789B1 FR2809789B1 (en) | 2002-09-27 |
Family
ID=8850798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0006937A Expired - Fee Related FR2809789B1 (en) | 2000-05-30 | 2000-05-30 | RECIRCULATING SCREWS FOR ROLLING ORGANS |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2809789B1 (en) |
WO (1) | WO2001092762A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10354064A1 (en) * | 2003-11-19 | 2005-06-02 | Ina-Schaeffler Kg | Roller screw |
KR101232398B1 (en) * | 2004-09-08 | 2013-02-12 | 티에치케이 가부시끼가이샤 | Roller screw |
JP4634116B2 (en) * | 2004-10-22 | 2011-02-16 | Thk株式会社 | Roller screw |
JP5069555B2 (en) * | 2005-02-07 | 2012-11-07 | Thk株式会社 | Exercise guidance device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3884090A (en) | 1972-04-25 | 1975-05-20 | Skf Ind Trading & Dev | Roller screw mechanism |
SU1116251A1 (en) * | 1980-01-19 | 1984-09-30 | Хабаровский политехнический институт | Ball screw mechanism |
FR2699633A1 (en) | 1992-12-17 | 1994-06-24 | Aerospatiale | Roller screw mechanism, in particular for spacecraft, and linear actuator comprising such a mechanism. |
DE19622553A1 (en) * | 1996-06-05 | 1997-12-11 | Schaeffler Waelzlager Kg | Spindle and worm drive in e.g. feed screw for production machines and handling systems |
EP0890755A2 (en) * | 1997-07-01 | 1999-01-13 | Thk Co. Ltd. | Rolling element string and linear guide device and rolling element screw device using the same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000161459A (en) * | 1998-11-20 | 2000-06-16 | Hiroshi Teramachi | Cross roller screw device |
-
2000
- 2000-05-30 FR FR0006937A patent/FR2809789B1/en not_active Expired - Fee Related
-
2001
- 2001-05-16 WO PCT/FR2001/001494 patent/WO2001092762A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3884090A (en) | 1972-04-25 | 1975-05-20 | Skf Ind Trading & Dev | Roller screw mechanism |
SU1116251A1 (en) * | 1980-01-19 | 1984-09-30 | Хабаровский политехнический институт | Ball screw mechanism |
FR2699633A1 (en) | 1992-12-17 | 1994-06-24 | Aerospatiale | Roller screw mechanism, in particular for spacecraft, and linear actuator comprising such a mechanism. |
DE19622553A1 (en) * | 1996-06-05 | 1997-12-11 | Schaeffler Waelzlager Kg | Spindle and worm drive in e.g. feed screw for production machines and handling systems |
EP0890755A2 (en) * | 1997-07-01 | 1999-01-13 | Thk Co. Ltd. | Rolling element string and linear guide device and rolling element screw device using the same |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section PQ Week 198515, Derwent World Patents Index; Class Q64, AN 1985-092122, XP002157598 * |
Also Published As
Publication number | Publication date |
---|---|
FR2809789B1 (en) | 2002-09-27 |
WO2001092762A1 (en) | 2001-12-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |
Effective date: 20070131 |