[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2001092762A1 - Roller-screw mechanism for rolling elements - Google Patents

Roller-screw mechanism for rolling elements Download PDF

Info

Publication number
WO2001092762A1
WO2001092762A1 PCT/FR2001/001494 FR0101494W WO0192762A1 WO 2001092762 A1 WO2001092762 A1 WO 2001092762A1 FR 0101494 W FR0101494 W FR 0101494W WO 0192762 A1 WO0192762 A1 WO 0192762A1
Authority
WO
WIPO (PCT)
Prior art keywords
rollers
screw
roller
cage
rolling elements
Prior art date
Application number
PCT/FR2001/001494
Other languages
French (fr)
Inventor
Robert Gaiani
Original Assignee
Ratier-Figeac
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 Ratier-Figeac filed Critical Ratier-Figeac
Publication of WO2001092762A1 publication Critical patent/WO2001092762A1/en

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

Definitions

  • the present invention relates to a recirculating screw for rolling members, of the type comprising a screw and a nut between the cooperating threads from which circulate rolling members held by a cage, the rolling members and the cage being brought back permanently between the threads by a recirculation passage.
  • roller screws 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.
  • 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.
  • 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.
  • the 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.
  • the rollers can be cylindrical or slightly curved. They are made of steel, in particular stainless steel, ceramic, plastic, or any other material known for bearings. They can be coated or not, self-lubricated or not.
  • 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.
  • the efficiency of the system can be optimized by reducing friction at the point of contact.
  • the surface of rollers in contact can be greater than the contact surface of a roller screw, which has the effect of having a better load capacity.
  • 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, buckling resistance. equal to or greater than roller screws and a performance identical to or close to that of ball screws.
  • FIG. 1 is a schematic perspective view of a roller screw according to the invention
  • FIG. 2 is a more detailed view of the screw of Figure 1, without the nut;
  • - Figure 3 is a partial longitudinal section made at the screw-nut interface of the roller screw of the invention.
  • the figures show a screw 1 with a helical thread 2 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 screw 1 and nut 3, opposite, define between them a helical space of substantially square section, through which passes a train of rollers 5 maintained between them at a suitable spacing by a recirculation cage 6.
  • This has two wings 7 passing laterally along the rollers.
  • the cage 6 and the rollers 5 after having passed 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.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The invention concerns a roller-screw mechanism for rolling elements, comprising a screw (1) and a nut (3) between the co-operating threads of which circulate rolling elements (5) maintained by a cage (6), the rolling elements (5) and the cage (6) being permanently returned between the threads through a recycling passage. The invention is characterised in that the rolling elements (5) are rollers.

Description

Vis à recirculation d'organes roulants Rolling organ recirculation screw
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 par 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 members, of the type comprising a screw and a nut between the cooperating threads from which circulate rolling members held by a cage, the rolling members and the cage being brought back permanently between the threads by a recirculation passage.
Le 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.The 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 around 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 US 3884090 et FR 26996333. Alors que dans une vis à billes, la charge est transmise de l'écrou à la vis par l'intermédiaire de chaque bille, avec une surface de contact réduite, dans les vis à rouleaux, la charge est transmise de l'écrou à la vis par 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 US 3884090 and FR 26996333. While in a ball screw, the load is transmitted from the nut to the screw via each ball, with a reduced contact surface, in roller screws, the load is transmitted from the nut to the screw by the intermediate the 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.
Le 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 aux autres de façon à pouvoi supporter des charges axiales changeant de 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.The 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. 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 rollers can be cylindrical or slightly curved. They are made of steel, in particular stainless steel, ceramic, plastic, or any other material known for bearings. They can be coated or not, self-lubricated or not. 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 qui a pour effet d'avoir une 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, which has the effect of having a 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 au 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, buckling resistance. equal to or greater 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 de la description suivante, se référant aux dessins annexés sur lesquels :The invention will be better understood and other advantages and characteristics will be highlighted on reading the following description, referring to the attached drawings in which:
- la figure 1 est une vue en perspective schématique d'une vis à galets conforme à l'invention ;- Figure 1 is a schematic perspective view of a roller screw according to the invention;
- la figure 2 est une vue plus détaillée de la vis de la figure 1, sans l'écrou ; - la figure 3 est une coupe partielle longitudinale faite à l'interface vis-écrou de la vis à galets de l'invention.- Figure 2 is a more detailed view of the screw of Figure 1, without the nut; - Figure 3 is a partial longitudinal section made at the screw-nut interface of the roller screw of the invention.
Les figures montrent une vis 1 à filetage hélicoïdal 2 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-ci présente deux ailes 7 passant latéralement le long des galets. La cage 6 et 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.The figures show a screw 1 with a helical thread 2 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 screw 1 and nut 3, opposite, define between them a helical space of substantially square section, through which passes a train of rollers 5 maintained between them at a suitable spacing by a recirculation cage 6. This has two wings 7 passing laterally along the rollers. The cage 6 and the rollers 5 after having passed 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

REVENDICATIONS
1. Vis à recirculation d'organes roulants, du type comportant une vis (1) et un écrou (3) entre les filetages coopérants desquels circulent des galets (5) maintenus par une cage (6), les galets (5) et la cage (6) étant ramenés en permanence entre les filetages par un passage de recirculation (8), caractérisée en ce les galets (5) sont disposés dans la cage (6) avec leur axe (10) en alternance.1. Recirculating screw for rolling members, of the type comprising a screw (1) and a nut (3) between the cooperating threads from which rollers roll (5) held by a cage (6), the rollers (5) and the cage (6) being brought back permanently between the threads by a recirculation passage (8), characterized in that the rollers (5) are arranged in the cage (6) with their axis (10) alternately.
2. Vis selon la revendication 1, caractérisée en ce que l'alternance des galets (5) est égale (1/1) ou inégale (1/2, 1/3, ...).2. Screw according to claim 1, characterized in that the alternation of the rollers (5) is equal (1/1) or uneven (1/2, 1/3, ...).
3. Vis selon l'une quelconque des revendications 1 ou 2, caractérisée eh ce que les galets (5) sont en acier inoxydable, en céramique,, en matière plastique, en matériau revêtu, ou en matériau autolubrifié. 3. Screw according to any one of claims 1 or 2, characterized in that the rollers (5) are made of stainless steel, ceramic, plastic, coated material, or self-lubricating material.
PCT/FR2001/001494 2000-05-30 2001-05-16 Roller-screw mechanism for rolling elements WO2001092762A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR00/06937 2000-05-30
FR0006937A FR2809789B1 (en) 2000-05-30 2000-05-30 RECIRCULATING SCREWS FOR ROLLING ORGANS

Publications (1)

Publication Number Publication Date
WO2001092762A1 true WO2001092762A1 (en) 2001-12-06

Family

ID=8850798

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2001/001494 WO2001092762A1 (en) 2000-05-30 2001-05-16 Roller-screw mechanism for rolling elements

Country Status (2)

Country Link
FR (1) FR2809789B1 (en)
WO (1) WO2001092762A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10354064A1 (en) * 2003-11-19 2005-06-02 Ina-Schaeffler Kg Roller screw
JP2006118649A (en) * 2004-10-22 2006-05-11 Thk Co Ltd Roller screw
WO2006082936A1 (en) 2005-02-07 2006-08-10 Thk Co., Ltd. Movement guiding device
US8272289B2 (en) * 2004-09-08 2012-09-25 Thk Co., Ltd. Roller screw

Citations (6)

* Cited by examiner, † Cited by third party
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
JP2000161459A (en) * 1998-11-20 2000-06-16 Hiroshi Teramachi Cross roller screw device

Patent Citations (6)

* Cited by examiner, † Cited by third party
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
JP2000161459A (en) * 1998-11-20 2000-06-16 Hiroshi Teramachi Cross roller screw device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week 198515, Derwent World Patents Index; Class Q64, AN 1985-092122, XP002157598 *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 09 13 October 2000 (2000-10-13) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10354064A1 (en) * 2003-11-19 2005-06-02 Ina-Schaeffler Kg Roller screw
US8272289B2 (en) * 2004-09-08 2012-09-25 Thk Co., Ltd. Roller screw
JP2006118649A (en) * 2004-10-22 2006-05-11 Thk Co Ltd Roller screw
JP4634116B2 (en) * 2004-10-22 2011-02-16 Ｔｈｋ株式会社 Roller screw
WO2006082936A1 (en) 2005-02-07 2006-08-10 Thk Co., Ltd. Movement guiding device
US8146453B2 (en) 2005-02-07 2012-04-03 Thk Co., Ltd. Motion guide device
JP5069555B2 (en) * 2005-02-07 2012-11-07 Ｔｈｋ株式会社 Exercise guidance device

Also Published As

Publication number Publication date
FR2809789A1 (en) 2001-12-07
FR2809789B1 (en) 2002-09-27

Similar Documents

Publication Publication Date Title
US4964314A (en) Device for converting rotary motion to linear motion
EP2488773B1 (en) Differential roller screw
CA2776313C (en) Device for centring and guiding the rotation of a turbomachine shaft
EP2440795B1 (en) Family of fixation devices with variable taper
FR3026331A1 (en) EXTRACTION SLEEVE
EP1121553A1 (en) Integral threaded assembly of two metal tubes
US8152677B2 (en) High ratio eccentric planetary traction drive transmission
FR3036451A1 (en) ROLLER SCREW MECHANISM
FR2987881A1 (en) SECURE CONNECTION DEVICE, IN PARTICULAR FOR PIPING, TIP FOR THIS DEVICE AND METHOD FOR MANUFACTURING AN ASSOCIATED NUT.
WO2001092762A1 (en) Roller-screw mechanism for rolling elements
EP1964778B1 (en) Pivot with blades
FR2544040A1 (en) SHOCK ABSORBER DEVICE WITH DIFFERENTIATED ACTION
FR2657406A1 (en) Pulley for a transmission with automatic speed variation
EP1431597B1 (en) Manufacturing method of a metallic ball joint
FR2657132A1 (en) SPEED DRIVE PULLEY EQUIPPED WITH A TRANSMISSION MEMBRANE.
FR2953264A1 (en) ADJUSTED LENGTH SPACERS FOR BEARINGS
KR20060103256A (en) Roller screw
FR2832202A1 (en) Ball screw-nut assembly comprises screw rotating in nut whose threads form channel for balls and safety nut comprising two conically fitted parts ensuring friction torque in event of failure of nut
WO2021043826A1 (en) Reverse multi-track ball screw
FR2992379A1 (en) Annular-shaped thin nut for use in e.g. pivot connector, has interior circumferential surface for carrying threaded net that extends around longitudinal axis and presents asymmetrical trapezoidal profile in cutting plane
EP0203007B1 (en) Nut comprising an integrated elastic zone
FR3074549A1 (en) ROLLER BEARING IN CHEVRONS
FR3041724A1 (en) TORQUE LIMITING DEVICE
BE550333A (en)
FR2891603A1 (en) Sail boat pulley for e.g. circulating rope, has guiding element with revolution shape and with balls placed on its left and right lateral sides, and rollers situated between interior of element and revolution surface of rolling ring

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP