FR2525785A1 - Split rack assembly for play-free pinion drive - uses spring-loaded sliding rack housed in main rack to maintain teeth in contact with pinion - Google Patents

Split rack assembly for play-free pinion drive - uses spring-loaded sliding rack housed in main rack to maintain teeth in contact with pinion Download PDF

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Publication number
FR2525785A1
FR2525785A1 FR8206812A FR8206812A FR2525785A1 FR 2525785 A1 FR2525785 A1 FR 2525785A1 FR 8206812 A FR8206812 A FR 8206812A FR 8206812 A FR8206812 A FR 8206812A FR 2525785 A1 FR2525785 A1 FR 2525785A1
Authority
FR
France
Prior art keywords
rack
pinion
teeth
play
racks
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
Application number
FR8206812A
Other languages
French (fr)
Other versions
FR2525785B1 (en
Inventor
Guy D Agostino
Andre Dhainaut
Leon Roux
Jean-Claude Vergnes
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.)
Safran Aircraft Engines SAS
Original Assignee
SNECMA SAS
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 SNECMA SAS filed Critical SNECMA SAS
Priority to FR8206812A priority Critical patent/FR2525785A1/en
Publication of FR2525785A1 publication Critical patent/FR2525785A1/en
Application granted granted Critical
Publication of FR2525785B1 publication Critical patent/FR2525785B1/fr
Granted legal-status Critical Current

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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
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/04—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a rack
    • 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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/26—Racks
    • F16H55/28—Special devices for taking up backlash

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

Abstract

A hydraulic jack comprises a body (1) forming a cylinder (2) in which a piston (3) slides. The piston forms part of a shaft (4) which is extended by a toothed (5) rack (4a). The rack and shaft have a blind hole (6) in which a second rack (7) is able to slide. The teeth (8) on this rack are located in the same plane between the two toothed parts of the rack housing it. A helicoidal spring (10) is located in the blind hole to press its ends against the base of the hole and against the end of the second rack. The teeth on the two racks engage the teeth (11) of a pinion (12) carrying a cam (14) and which rotates on a shaft (13). Operation of the jack causes pinion and cam to rotate and the spring action acts on second rack to keep the teeth in contact with the teeth on the pinion to take up any play.

Description

DISPOSITIF DE RATTRAPAGE DE JEU
POUR MOYEN DE TRANSMISSiON A CREMAILLERE
La présente invention a pour objet un dispositif de rattrapage de jeu pour moyen de transmission à crémaillère.GAME CATCHING DEVICE
FOR MEANS OF RACK TRANSMISSION
The present invention relates to a backlash device for rack transmission means.

Pour transformer le mouvement de translation d'un vérin en un mouvement de rotation d'une came avec rattrapage de jeu, il est connu d'utiliser une tige de vérin dont une partie constitue une crémaillère engrenant avec une roue dentée solidaire d'une came. La roue dentée qui a fait l'objet du brevet français 1 378 243 est constituée d'au moins deux flasques dentés disposés côte à côte et reliés par une barre de torsion destinée à rattraper le jeu.To transform the translational movement of a jack into a rotational movement of a cam with backlash, it is known to use a jack rod, part of which constitutes a rack meshing with a toothed wheel secured to a cam . The toothed wheel which was the subject of French patent 1 378 243 consists of at least two toothed flanges arranged side by side and connected by a torsion bar intended to make up for the play.

Cette disposition, qui a pour avantage de n'introduire aucun effort parasite, présente l'inconvénient de nécessiter un nombre d'éléments relativement important dont le montage et le réglage sont assez compliqués.This arrangement, which has the advantage of not introducing any parasitic force, has the drawback of requiring a relatively large number of elements, the mounting and adjustment of which are quite complicated.

Conformément à la présente invention, le dispositif comprend deux crémaillères dont l'une, montée coulissante par rapport à l'autre, est soumise à l'action d'un organe élastique disposé entre lesdites crémaillères dont les dentures sont maintenues en contact permanent avec la denture du pignon avec lequel elles cooptèrent. In accordance with the present invention, the device comprises two racks, one of which, slidingly mounted relative to the other, is subjected to the action of an elastic member disposed between said racks, the teeth of which are kept in permanent contact with the toothing of the pinion with which they co-opted.

Cette disposition présente une simplification évidente, en faisant appel à des éléments beaucoup plus faciles à fabriquer, à monter et à régler. Il résulte de cette simplification du dispositif un poids et un coût moins élevé, ainsi qu'une plus grande fiabilité.This arrangement presents an obvious simplification, by using elements that are much easier to manufacture, to assemble and to adjust. This simplification of the device results in a lower weight and cost, as well as greater reliability.

D'autres caractéristiques et avantages de l'invention seront mieux compris d la lecture de la description qui va suivre d'un mode de réalisation et en se référant aux dessins annexes, sur lesquels
la figure 1 est une vue en élévation et en coupe
axiale suivant la ligne I-I de la figure 2 d'un
dispositif de rattrapage de jeu pour transmission à
crémaillère suivant la présente demande
la figure 2 est une vue en coupe suivant la ligne
Il-Il de la figure I.Other characteristics and advantages of the invention will be better understood from reading the following description of an embodiment and with reference to the accompanying drawings, in which
Figure 1 is an elevational view in section
axial along line II of Figure 2 of a
backlash device for transmission to
rack according to this request
Figure 2 is a sectional view along the line
Il-Il in figure I.

Aux figures 1 et 2, on a représente un mode de réalisation .1'un 1isposit.if de rattrapage de zeu pour un moyen de t transmission à crémaillère, comprenant un vérin de commande hydraulique constitue d'un corps l présentant un cylindre 2 dans lequel est monté coulissant un piston 3 solidaire d'une tige 4 qui est prolonge par une crémaillère 4a présentant une denture 5.In Figures 1 and 2, there is shown an embodiment .1'un 1isposit.if zeu catch-up for a rack transmission means t, comprising a hydraulic control cylinder consists of a body l having a cylinder 2 in which is slidably mounted a piston 3 secured to a rod 4 which is extended by a rack 4a having a toothing 5.

La crémaillère 4a et la tige 4 comportent un trou borgne 6 dans lequel est montée coulissante une deuxième crémaillère 7 laquelle présente une denture 8 situe entre les deux parties de la denture S de la crémnillre 4a et dans un même plan.The rack 4a and the rod 4 have a blind hole 6 in which is slidably mounted a second rack 7 which has a toothing 8 located between the two parts of the toothing S of the rack 4a and in the same plane.

Dans le trou borgne 6 est disposé un ressort hélicoïdal 10 dont une extrémité est en appui contre le fond du trou borgne 6 et dont l'autre extrémité est en appui contre l'une des extrémités de la deuxième crémaillère 7.In the blind hole 6 is disposed a helical spring 10, one end of which bears against the bottom of the blind hole 6 and the other end of which bears against one of the ends of the second rack 7.

Les dentures 5 et 8 des deux crémaillères sont en prise avec la denture ll d'un pignon 12 monté rotatif suivant un axe 13 et portant, dans l'exemple représenté, une came 14. The teeth 5 and 8 of the two racks are engaged with the teeth ll of a pinion 12 mounted to rotate along an axis 13 and carrying, in the example shown, a cam 14.

Le piston 3 du vérin de commande est actionné sur ses deux faces par un fluide et il ajoure le déplacement longitudinal de la tige 4 et de la crémaillère 4a qui entraine en rotation, par sa denture 5 et la denture 8 de la crémail lére 7, le pignon 12.The piston 3 of the control actuator is actuated on its two faces by a fluid and it perforates the longitudinal displacement of the rod 4 and of the rack 4a which drives in rotation, by its toothing 5 and the toothing 8 of the light rack 7, the pinion 12.

Le ressort 10 qui agit sur la crémaillère 7 maintient en contact permanent les dentures 5 et 8 des crémaillères avec la denture 11 du pignon 12 à laquelle elles sont associées, afin de rattraper les jeux de denture.The spring 10 which acts on the rack 7 maintains in permanent contact the teeth 5 and 8 of the racks with the teeth 11 of the pinion 12 with which they are associated, in order to make up for the backlash.

Dans le mode de réalisation représenté, le pignon 12 est entraîné par la crémaillère 4a ; toutefois, il est possible d'utiliser le dispositif de rattrapage de jeu dans un moyen de transmission dans lequel le pignon moteur entraîne la crémaillère en translation.In the embodiment shown, the pinion 12 is driven by the rack 4a; however, it is possible to use the play take-up device in a transmission means in which the drive pinion drives the rack in translation.

Par ailleurs, la forme des crémaillères peut être différente de celle représentée au dessin et celles-ci peuvent présenter notamment une section transversale rectangulaire.Furthermore, the shape of the racks may be different from that shown in the drawing and these may in particular have a rectangular cross section.

Bien entendu, l'invention n'est pas limitative et l'homme de l'art pourra y apporter des modifications sans sortir pour cela du domaine de l'invention. Of course, the invention is not limiting and those skilled in the art may make modifications to it without departing from the scope of the invention.

Claims (5)

REVENDICATIONS 1. Dispositif de rattrapage de jeu entre un organe d'entraînement et un organe entraîné d'un moyen de transmission de mouvement comprenant un pignon engrenant avec un système à crémaillère caractérisé en ce qu'il comprend deux crémaillères (4a, 7) dont l'une (7) montée coulissante par rapport à l'autre (4a) est soumise à l'action d'un organe élastique (10) disposé entre lesdites crémaillères (4a, 7) dont les dentures (5, 8) sont maintenues en contact permanent avec la denture (11) du pignon (12) avec lequel elles cooptèrent. 1. Device for taking up play between a drive member and a member driven by a movement transmission means comprising a pinion meshing with a rack system characterized in that it comprises two racks (4a, 7) of which l '' (7) slidingly mounted relative to the other (4a) is subjected to the action of an elastic member (10) disposed between said racks (4a, 7) whose teeth (5, 8) are held in permanent contact with the teeth (11) of the pinion (12) with which they coopted. 2. Dispositif suivant la revendication la caractérisé en ce que l'une des crémaill & es (4a) présente un trou borgne axial (6) dans lequel est montée coulissante l'autre cr & maillure (7) qui est soumise à l'action d'un ressort (10) en appui d'un côté contre le fond du trou borgne (6) de l'autre côté contre l'une des extrémités de l'autre cré maillée (7).2. Device according to claim characterized in that one of the racks & es (4a) has an axial blind hole (6) in which is slidably mounted the other cr & mesh (7) which is subjected to the action a spring (10) resting on one side against the bottom of the blind hole (6) on the other side against one of the ends of the other mesh (7). 3. Dispositif suivant les revendications 1 et 2, caractérisé en ce que les dentures (5 et 8) des deux crémaillères (4a, 7) sont disposées dans un même plan.3. Device according to claims 1 and 2, characterized in that the teeth (5 and 8) of the two racks (4a, 7) are arranged in the same plane. 4. Dispositif suivant la revendication 1, carctérisé en ce que l'une des crémaillères (4a) présente à l'une de ses extrémités un piston (3) d'un vérin de commande hydraulique.4. Device according to claim 1, characterized in that one of the racks (4a) has at one of its ends a piston (3) of a hydraulic control cylinder. 5. Dispositif suivant la revendication 1, caractérisé en ce que le pignon (12) est muni d'une came (14). 5. Device according to claim 1, characterized in that the pinion (12) is provided with a cam (14).
FR8206812A 1982-04-21 1982-04-21 Split rack assembly for play-free pinion drive - uses spring-loaded sliding rack housed in main rack to maintain teeth in contact with pinion Granted FR2525785A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8206812A FR2525785A1 (en) 1982-04-21 1982-04-21 Split rack assembly for play-free pinion drive - uses spring-loaded sliding rack housed in main rack to maintain teeth in contact with pinion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8206812A FR2525785A1 (en) 1982-04-21 1982-04-21 Split rack assembly for play-free pinion drive - uses spring-loaded sliding rack housed in main rack to maintain teeth in contact with pinion

Publications (2)

Publication Number Publication Date
FR2525785A1 true FR2525785A1 (en) 1983-10-28
FR2525785B1 FR2525785B1 (en) 1985-03-01

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FR8206812A Granted FR2525785A1 (en) 1982-04-21 1982-04-21 Split rack assembly for play-free pinion drive - uses spring-loaded sliding rack housed in main rack to maintain teeth in contact with pinion

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471115A1 (en) * 1989-02-21 1992-02-19 MANNESMANN Aktiengesellschaft Method and device for fabricating bar-shaped metallic products
EP0663261A1 (en) * 1993-12-17 1995-07-19 Montech AG Drive for actuating a pinion shaft
CN103883708A (en) * 2014-03-26 2014-06-25 浙江大学 Gear rack transmission mechanism and gap elimination device for gear rack transmission mechanism
CN109296718A (en) * 2018-12-04 2019-02-01 四川宏华石油设备有限公司 A kind of guiding device
WO2019132799A3 (en) * 2017-12-28 2019-10-03 Yolartiran Muhammet Enes New-generation engine construct which provides fuel conservation and high power

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548603A (en) * 1947-11-28 1951-04-10 Gen Electric Zero backlash gear drive
DE1137314B (en) * 1960-12-13 1962-09-27 Schwermaschb Karl Liebknecht M Toothed hydraulic piston
US3805634A (en) * 1973-02-02 1974-04-23 Gen Motors Corp Steering gear assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548603A (en) * 1947-11-28 1951-04-10 Gen Electric Zero backlash gear drive
DE1137314B (en) * 1960-12-13 1962-09-27 Schwermaschb Karl Liebknecht M Toothed hydraulic piston
US3805634A (en) * 1973-02-02 1974-04-23 Gen Motors Corp Steering gear assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471115A1 (en) * 1989-02-21 1992-02-19 MANNESMANN Aktiengesellschaft Method and device for fabricating bar-shaped metallic products
EP0663261A1 (en) * 1993-12-17 1995-07-19 Montech AG Drive for actuating a pinion shaft
CN103883708A (en) * 2014-03-26 2014-06-25 浙江大学 Gear rack transmission mechanism and gap elimination device for gear rack transmission mechanism
WO2019132799A3 (en) * 2017-12-28 2019-10-03 Yolartiran Muhammet Enes New-generation engine construct which provides fuel conservation and high power
CN109296718A (en) * 2018-12-04 2019-02-01 四川宏华石油设备有限公司 A kind of guiding device

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Publication number Publication date
FR2525785B1 (en) 1985-03-01

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