FR2839539A1 - Ball circulation threaded drive comprises threaded pin with rotating nut sliding along pin and several balls between opposite thread grooves - Google Patents

Ball circulation threaded drive comprises threaded pin with rotating nut sliding along pin and several balls between opposite thread grooves Download PDF

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Publication number
FR2839539A1
FR2839539A1 FR0305492A FR0305492A FR2839539A1 FR 2839539 A1 FR2839539 A1 FR 2839539A1 FR 0305492 A FR0305492 A FR 0305492A FR 0305492 A FR0305492 A FR 0305492A FR 2839539 A1 FR2839539 A1 FR 2839539A1
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FR
France
Prior art keywords
grooves
threaded
nut
pin
balls
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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.)
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FR0305492A
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French (fr)
Inventor
Kurt Husistein
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Eichenberger Gewinde AG
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Eichenberger Gewinde AG
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Publication date
Application filed by Eichenberger Gewinde AG filed Critical Eichenberger Gewinde AG
Publication of FR2839539A1 publication Critical patent/FR2839539A1/en
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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
    • 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
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls

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

Abstract

The threaded drive comprises a threaded pin (1) with a rotating nut (2) able to slide along the pin. There are several balls (7,8) between opposite grooves (3,4,5,6) of the threads. The pin and the nut each have a multiple thread with at least two parallel thread grooves.

Description

plateaux. La presente invention a pour objet un entranement filete atrays. The present invention relates to a threaded drive to

circulation de billes avec un falble jeu, comprenant une broche filetee, un ecrou pouvant par un mouvement relatif de rotation coulisser le long de la broche et plusieurs billes entre les gorges de filetage se faisant face dans  circulation of balls with a falble set, comprising a threaded spindle, a nut which, by a relative movement of rotation, slides along the spindle and several balls between the thread grooves facing each other

s la broche et dans l'ecrou.s the spindle and in the nut.

On connat, par le document DE-A1-3700693 un entrane-  We know, by document DE-A1-3700693 a entrane-

ment a circulation a billes de ce genre. I1 est compose d'une broche filetee et de deux corps d'ecrou reunis pouvant se deplacer longitudinalement sur la broche par rotation. Entre les gorges de filetage se faisant face dans  ment to ball circulation of this kind. It consists of a threaded spindle and two joined nut bodies which can move longitudinally on the spindle by rotation. Between the thread grooves facing each other in

o la broche et dans les deux corps d'ecrou vent montees des billes pour as-  o the spindle and in the two wind nut bodies mounted with balls for

surer la transmission des forces dans l'entranement a circulation de billes. Pour diminuer le jeu entre la broche filetee et les corps d'ecrou, ceux-ci presentent l'un par rapport a l'autre une certaine dimension de precontrainte, obtenue en reglant et en fixant la position relative de rota s tion des deux corps d'ecrou et de la broche filetee. Cette disposition cree  secure the transmission of forces in the ball circulation drive. To reduce the clearance between the threaded spindle and the nut bodies, the latter have, relative to each other, a certain dimension of prestressing, obtained by adjusting and fixing the relative position of rotation of the two bodies. nut and threaded spindle. This provision creates

un canal de circulation de billes qui presente entre ses parties situees en-  a ball circulation channel which presents between its parts located

tre la broche filetee et les deux corps d'ecrou respectivement, la dimension de precontrainte indIquee en direction axiale. Ce systeme est compose de beaucoup de parties individuelles, ce qui n'est pas economique. Le reglage  be the threaded spindle and the two nut bodies respectively, the dimension of prestressing indicated in the axial direction. This system is made up of many individual parts, which is not economical. Adjustment

o et la fixation de la position relative des deux corps d'ecrou vent tres com-  o and fixing the relative position of the two nut bodies is very

pliques. Apres reglage de la position, sa fixation est assuree par une  replicas. After adjusting the position, it is fixed by a

masse durcissable, qui demande beaucoup de temps pour durcir.  curable mass, which takes a long time to harden.

L'objectif de ['invention est de developper un entranement filete a circulation de billes du genre indique, compose de peu d'elements  The objective of the invention is to develop a threaded drive with circulation of balls of the indicated type, composed of few elements

s individuals, facile a fabriquer et presentant des avantages economiques.  s individual, easy to manufacture and with economic advantages.

Cet objectif est atteint en prevoyant que la broche filetee ainsi que l'ecrou portent un filetage multiple avec au moins deux gorges de filetage paralleles, les gorges situees d'un cote etant par rapport aux gorges qui vent situees en face et qui guident les memes billes, decalees  This objective is achieved by providing that the threaded spindle as well as the nut carry a multiple thread with at least two parallel thread grooves, the grooves located on one side being relative to the grooves which wind opposite and which guide the same balls, staggered

so en direction axiale d'une dimension de precontrainte.  so in axial direction of a prestressing dimension.

Cet entranement a circulation de billes est compose de peu de pieces, a savoir la broche filetee, un ecrou et les billes situees entre  This ball circulation drive consists of few parts, namely the threaded spindle, a nut and the balls located between

eux. La fabrication de la broche comme de ltecrou avec au moins deux fi-  them. The manufacture of the spindle as of the nut with at least two threads

letages paralleles est simple et releve des connaissances de base du pro ss fessionnel concerne. Par ailleurs, il est possible, avec des moyens simplex,  parallel lettering is simple and is based on basic knowledge of the professional sector concerned. Furthermore, it is possible, with simplex means,

de decaler l'une par rapport a l'autre les deux gorges des filetages paralle-  to offset the two grooves of the parallel threads relative to each other-

les, d'une dimension de precontrainte. Ce decalage ainsi cree entre les gorges oblige les billes qui circulent dans celles-ci, a rouler sur les francs des gorges en creant ainsi une precontrainte axiale entre la broche filetee  them, of a dimension of prestressing. This offset thus created between the grooves forces the balls which circulate in them, to roll on the franks of the grooves thus creating an axial prestress between the threaded spindle

et l'ecrou. Cette precontrainte diminue le jeu de l'entranement a circula-  and the nut. This prestress reduces the backlash of the circulating drive-

tion de billes.tion of balls.

Les distances entre au moins une gorge de filetage portee s par la broche filetee et les deux gorges voisines presente avantageusement une difference egale a la dimension de precontrainte. Le decalage d'une des gorges paralleles, dans un systeme a plusieurs filetages, par rapport a la gorge voisine peut etre realise avec des moyens simples et produire la  The distances between at least one thread groove carried by the threaded spindle and the two adjacent grooves advantageously have a difference equal to the dimension of prestressing. The offset of one of the parallel grooves, in a system with several threads, relative to the neighboring groove can be achieved with simple means and produce the

reduction desiree du jeu dans l'entranement a circulation de billes.  Desired reduction of play in the ball circulation drive.

o Des exemples de realisation de ['invention, representes par le dessin annexe, vent decrits ci-apres: - la figure 1 represente, en coupe partielle, un entraAnement a circulation de billes comprenant une broche filetee a filetages decales, - la figure 2 represente, en coupe partielle, un autre entranement a cir  o Examples of embodiment of the invention, represented by the appended drawing, wind described below: - Figure 1 shows, in partial section, a ball circulation drive comprising a threaded spindle with offset threads, - Figure 2 represents, in partial section, another drive to cir

i5 culation de billes comprenant un ecrou portent des filetages decales.  i5 ball culation comprising a nut carry offset threads.

L'entramement a circulation de billes selon la figure 1 com-  The opening with circulation of balls according to FIG. 1 includes

prend une broche filetee 1 et un ecrou 2 represente coupe, la broche 1 et  takes a threaded pin 1 and a nut 2 represents a cut, pin 1 and

l'ecrou 2 portent tous deux un double filetage. Chacune des gorges paral-  nut 2 both carry a double thread. Each of the paral gorges

leles 3 et 4 des filetages que porte la broche filetee 1 n'est pas espacee de o la meme distance de l'autre gorge voisine. Les gorges 3 et 4 vent decalees alternativement en direction axiale d'une dimension de precontrainte. Le double filetage de l'ecrou 2 est un double filetage usuel, presentant des  leles 3 and 4 of the threads carried by the threaded spindle 1 is not spaced from where the same distance from the other neighboring groove. The grooves 3 and 4 are shifted alternately in the axial direction by a dimension of prestressing. The double thread of nut 2 is a common double thread, presenting

distances egales entre les gorges de filetage 5 et 6.  equal distances between thread grooves 5 and 6.

Les billes 7 circulant entre les gorges 4 et 5, et les billes 8 :s circulant entre les gorges 3 et 6 sont, du fait du decalage entre les gorges 4, 5 et 3, 6 guidant les memes billes 7, 8, obligees de rouler sur les flancs des gorges 4, 5, 3, 6. Ce decalage axial cree la dimension de precontrainte  The balls 7 circulating between the grooves 4 and 5, and the balls 8: s circulating between the grooves 3 and 6 are, due to the offset between the grooves 4, 5 and 3, 6 guiding the same balls 7, 8, forced to roll on the sides of the grooves 4, 5, 3, 6. This axial offset creates the dimension of prestressing

entre la broche filetee 1 et ltecrou 2 et reduit le jeu de ltentranement a cir-  between the threaded spindle 1 and the nut 2 and reduces the backlash of the drive

culation a billes. En ['absence d'un decalage relatif des gorges de filetage 4, 5 et 3, 6 se faisant face et guidant les memes billes, le jeu de ltentranement ntest pas reduit, mais si le decalage est trop important, ltentramement est bloque. La dimension de precontrainte doit etre choisie  ball culation. In the absence of a relative offset of the thread grooves 4, 5 and 3, 6 facing each other and guiding the same balls, the play in the drive is not reduced, but if the offset is too great, the drive is blocked. The prestressing dimension must be chosen

entre ces limites.between these limits.

Pour le retour des billes 7, il est prevu dans l'ecrou 2 un canal de retour 9, aux deux extremites duquel vent prevus des elements de renvoi non figures, qui devient les billes 7 sortant des gorges 4 et 7 dans le canal de retour 9, et inversement. Pour le retour des billes 8, il est prevu dans ltecrou 2 un canal de retour 10 avec a ses extremites, des ele  For the return of the balls 7, there is provided in the nut 2 a return channel 9, at the two ends of which wind provided for non-illustrated return elements, which becomes the balls 7 leaving the grooves 4 and 7 in the return channel 9, and vice versa. For the return of the balls 8, there is provided in the nut 2 a return channel 10 with at its ends, elements

ments de renvoi non figures.not shown.

La figure 2 montre un autre entranement a circulation de billes. A la partie superieure de la figure, est represente en coupe l'ecrou s 11 de cet entranement, avec ses gorges de filetage 15, 16 decalees. La broche 11 circulant dans ltecrou 12 porte des gorges de filetage 13, 14 pa ralleles 13, 14 egalement espacees. La broche 12 et l'ecrou vent a double filetage. Dans l'ecrou 11 chacune des gorges 15, 16 est usinee en etant espacee inegalement d'un cote et de l'autre. Ces gorges 15, 16 vent deca o lees en direction axiale de la dimension de precontrainte qui doit etre choisie entre zero et la dimension provoquant le coincement des billes 17, 18. Les billes 17 circulant entre les gorges 13 et 15, et les billes 18 circulant entre les gorges 14 et 16 vent obligees de rouler sur les flancs s des gorges 13, 15, 14, 16 par le decalage axial entre ces gorges se faisant face et guidant les billes egales 7, 8. Le decalage des gorges 15, 16 de la dimension de precontrainte reduit, par un guidage plus precis des billes, le jou de l'entranement a circulation de billes. Ce jeu peut etre regle en core plus exactement en choisissant le diametre des billes 17, 18. La force de precontrainte entre la broche filetee 1, 12 et l'ecrou 2, 11 peut done  Figure 2 shows another drive with ball circulation. In the upper part of the figure, is shown in section the nut s 11 of this drive, with its threaded grooves 15, 16 offset. The spindle 11 circulating in the nut 12 carries thread grooves 13, 14 by ralleles 13, 14 also spaced. Spindle 12 and the double thread wind nut. In the nut 11 each of the grooves 15, 16 is machined by being unevenly spaced on one side and the other. These grooves 15, 16 wind deca o lees in the axial direction of the prestressing dimension which must be chosen between zero and the dimension causing the jamming of the balls 17, 18. The balls 17 circulating between the grooves 13 and 15, and the balls 18 circulating between the grooves 14 and 16 wind forced to roll on the sides of the grooves 13, 15, 14, 16 by the axial offset between these grooves facing each other and guiding the equal balls 7, 8. The offset of the grooves 15, 16 of the reduced prestressing dimension, by more precise guidance of the balls, the play of the ball circulation drive. This clearance can be adjusted more precisely by choosing the diameter of the balls 17, 18. The prestressing force between the threaded spindle 1, 12 and the nut 2, 11 can therefore

etre reglee a des niveaux finement divises.  be set at finely divided levels.

Il est prevu dans l'ecrou 11 pour le retour des billes 17 un canal de retour 19 et pour le retour des billes 18 un autre canal de retour 20. Aux extremites des deux canaux 19, 20 vent montes les elements de s renvoi non figures, qui font passer les billes 17, 18 sortant de la zone de travail entre la broche et l'ecrou 11, dans les canaux de retour 19, 20 et qui les devient de ces canaux pour les ramener dans la zone de travail in diquee.  It is provided in the nut 11 for the return of the balls 17 a return channel 19 and for the return of the balls 18 another return channel 20. At the ends of the two channels 19, 20 wind mounted return elements not shown , which pass the balls 17, 18 leaving the work area between the spindle and the nut 11, in the return channels 19, 20 and which becomes them of these channels to bring them back into the work area indicated.

Claims (2)

REVENDICATIONS 1 ) Entranement filete a circulation a billes avec un faible jeu, compre nant une broche filetee (1, 12), un ecrou (2, 11) pouvant par un mouve ment relatif de rotation coulisser le long de la broche et plusieurs billes (7, 8, 17, 18) entre les gorges (3, 4, 5, 6, 13, 14, 15, 16) se faisant face, des filetages portes par la broche (1, 12) et par l'ecrou (2, 11), caracterise en ce que la broche filetee (1, 12) ainsi que ltecrou (2, 11) portent chacun un filetage multiple avec au moins deux gorges de filetage paralleles (3, 4, 5, 6, 13, o 14, 15, 16), les gorges (3, 4, 15, 16) situees d'un cote etant par rapport aux gorges (5, 6, 13, 14) qui vent situees en face et guident les memes billes (8, 17), decalees en direction axiale d'une dimension de precon trainte. s 2 ) Entranement filete selon la revendication 1, caracterise en ce que les distances separant au moins une gorge de filetage (3) portee par la broche filetee, des deux gorges de flletage voisines (4), presentent une dif  1) Threaded ball circulation drive with little play, including a threaded spindle (1, 12), a nut (2, 11) capable of sliding along the spindle with a relative movement of rotation and several balls (7 , 8, 17, 18) between the grooves (3, 4, 5, 6, 13, 14, 15, 16) facing each other, threads carried by the spindle (1, 12) and by the nut (2, 11), characterized in that the threaded pin (1, 12) as well as the nut (2, 11) each carry a multiple thread with at least two parallel thread grooves (3, 4, 5, 6, 13, or 14, 15, 16), the grooves (3, 4, 15, 16) located on one side being with respect to the grooves (5, 6, 13, 14) which wind located opposite and guide the same balls (8, 17) , shifted in the axial direction by one dimension of preconstructure. s 2) Threaded drive according to claim 1, characterized in that the distances separating at least one thread groove (3) carried by the threaded spindle, from the two adjacent flutter grooves (4), have a dif ference egale a la dimension de precontrainte.  ference equal to the prestressing dimension. 3 ) Entranement filete selon la revendication 1, caracterise en ce que les distances separant au moins une gorge de filetage (15) portee par l'ecrou (11), des deux gorges de filetage voisines (16), presentent une diffe  3) threaded drive according to claim 1, characterized in that the distances separating at least one thread groove (15) carried by the nut (11), from the two adjacent thread grooves (16), have a diffe
FR0305492A 2002-05-07 2003-05-06 Ball circulation threaded drive comprises threaded pin with rotating nut sliding along pin and several balls between opposite thread grooves Withdrawn FR2839539A1 (en)

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CH7762002 2002-05-07

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FR0305492A Withdrawn FR2839539A1 (en) 2002-05-07 2003-05-06 Ball circulation threaded drive comprises threaded pin with rotating nut sliding along pin and several balls between opposite thread grooves

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012022502A1 (en) * 2010-08-17 2012-02-23 Schaeffler Technologies Gmbh & Co. Kg Ball screw with multiple thread flights

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700693A1 (en) 1987-01-13 1988-07-28 Steinmeyer August Gmbh Co Kg Ball screw

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700693A1 (en) 1987-01-13 1988-07-28 Steinmeyer August Gmbh Co Kg Ball screw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012022502A1 (en) * 2010-08-17 2012-02-23 Schaeffler Technologies Gmbh & Co. Kg Ball screw with multiple thread flights

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