FR2508406A2 - Vehicle power-assisted steering device - has first rotor located axially within chambers in which stator pressure and return orifices communicate - Google Patents

Vehicle power-assisted steering device - has first rotor located axially within chambers in which stator pressure and return orifices communicate Download PDF

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Publication number
FR2508406A2
FR2508406A2 FR8112714A FR8112714A FR2508406A2 FR 2508406 A2 FR2508406 A2 FR 2508406A2 FR 8112714 A FR8112714 A FR 8112714A FR 8112714 A FR8112714 A FR 8112714A FR 2508406 A2 FR2508406 A2 FR 2508406A2
Authority
FR
France
Prior art keywords
rotor
stator
openings
pressure
orifices
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
FR8112714A
Other languages
French (fr)
Other versions
FR2508406B2 (en
Inventor
Patrice Bertin
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.)
Valeo SE
Original Assignee
Valeo SE
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 Valeo SE filed Critical Valeo SE
Priority to FR8112714A priority Critical patent/FR2508406A2/en
Priority to GB8121125A priority patent/GB2082130B/en
Priority to US06/283,155 priority patent/US4434706A/en
Priority to DE19813128368 priority patent/DE3128368A1/en
Publication of FR2508406A2 publication Critical patent/FR2508406A2/en
Application granted granted Critical
Publication of FR2508406B2 publication Critical patent/FR2508406B2/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
    • B62D5/083—Rotary valves

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

The power-assisted steering device comprises a two-part steering column (13A,13B) , and a hydraulic assistance mechanism responsive to relative angular displacement of the parts. The distributor comprises a stator (25) having a pressure orifice (26), a return orifice (27), and two service orifices (28,29) connected to the assisting jack. Two adjacent rotors (40,41) are located within the stator rotatable respectively with the two parts, the first rotor having distribution passages (48) communicating with the stator pressure and return orifices, and the second rotor having distribution passages (51,52) interacting with the first rotor distribution passages and communicating with the stator service orifices. The stator pressure and return orifices communicate respectively with two chambers (47,49), one of which (47) is peripheral and the other of which (49) is central .

Description

Dans le Brevet Principal, on a décrit un dispositif de direction assistée d'un véhicule, comportant des moyens pilotes agissant sur des moyens de braquage, lesdits moyens pilotes ayant un élément de transmission en deux parties, lesquelles sont prévues avec un jeu angulaire relatif limité permettant un décalage angulaire entre lesdites parties sous l'action desdits moyen.s pilotes, et des moyens d'as-sistan.ce, qui, en réponse à un tel décalage angulaire, sont admis à agir sur les moyens de braquage dans le même sens que les moyens pilotes, dispositif dans lequel lesdits moyens d'assistance comportent une centrale hydraulique ayant des moyens de pression de fluide et un réservoir, un actuateur agissant sur les moyens de braquage, et un. distributeur hydraulique interposé entre la centrale et l'actuateur, ledit distributeur comportant un stator ayant un orifice de pression, relié aux moyens de pression de fluide, un orifice de retour relié au réservoir et deux orifices de service, reliés à l'actuateur et deux rotors adjacents qui sont enveloppés par le stator et qui sont respectivement solidaires en rotation des deux dites parties de l'élément de transmission, un premier desdits rotors ayant des passages de distribution coopérant avec les orifices de pression et de retour du stator, tandis que le deuxième rotor a des passages de distribution qui coopèrent tant avec les passages de distribution du premier rotor qu'avec les orifices de service du stator, dispositif caractérisé en ce que les orifices de pression et de retour du stator comrnuniquent respectivement avec deux chanvres situées en regard de l'épaisseur du premier rotor, l'une de ces chanvres étant périphérique etcommuniquant directement avec des passages du premier rotor qui consistent en des ouvertures suivant la périphérie externe du premier rotor, tandis que l'autre chambre est centrale et communique directement avec d'autres passages du premier rotor qui consistent en des ouvertures suivant la périphérie interne du premier rotor. In the main patent, a device for power steering of a vehicle has been described, comprising pilot means acting on steering means, said pilot means having a transmission element in two parts, which are provided with a limited relative angular play. allowing an angular offset between said parts under the action of said pilot means, and as-sistan.ce means, which, in response to such an angular offset, are allowed to act on the turning means in the same sense that the pilot means, device in which said assistance means comprise a hydraulic unit having fluid pressure means and a reservoir, an actuator acting on the turning means, and one. hydraulic distributor interposed between the central unit and the actuator, said distributor comprising a stator having a pressure orifice, connected to the fluid pressure means, a return orifice connected to the reservoir and two service orifices, connected to the actuator and two adjacent rotors which are enveloped by the stator and which are respectively integral in rotation with the two said parts of the transmission element, a first of said rotors having distribution passages cooperating with the pressure and return orifices of the stator, while the second rotor has distribution passages which cooperate both with the distribution passages of the first rotor and with the stator service orifices, device characterized in that the pressure and return orifices of the stator communicate respectively with two hemp located opposite the thickness of the first rotor, one of these hemp being peripheral and communicating directly with passages of the pr first rotor which consist of openings along the external periphery of the first rotor, while the other chamber is central and communicates directly with other passages of the first rotor which consist of openings along the internal periphery of the first rotor.

Plus particulièrement, dans le Brevet Principal, on a prévu les ouvertures externes du premier rotor sous forme de secteurs ouverts, tandis que les ouvertures internes consistent en des fenêtres à contour fermé. Dans la forme d'exécution représentée au Brevet Principal, les ouvertures externes sont au nombre de deux et il en est de même pour les ouvertures inter nes
La présente invention a pour objet en addition. au Brevet principal un dispositif de direction assistée d'un véhicule dont les rotors, notamment le premier rotor, présentent une variante de construction.More particularly, in the main patent, the external openings of the first rotor have been provided in the form of open sectors, while the internal openings consist of windows with closed outline. In the embodiment shown in the main patent, there are two external openings and the same is true for internal openings
The subject of the present invention is in addition. in the main patent a power steering device of a vehicle whose rotors, in particular the first rotor, have a construction variant.

Suivant l'invention, ce dispositif de direction assistée est caractérisé en ce que les ouvertures externes et les ouvertures internes du premier rotor consistent en des secteurs ouverts alternés, ledit premier rotor ayant ainsi une forme annulaire tortueuse. Grâce à cette disposition, ce premier rotor a une construction particulièrement simple avec une bonne robustesse, et est d'une fabrication commode. According to the invention, this power steering device is characterized in that the external openings and the internal openings of the first rotor consist of alternating open sectors, said first rotor thus having a tortuous annular shape. Thanks to this arrangement, this first rotor has a particularly simple construction with good robustness, and is of a convenient manufacture.

De préférence, les secteurs ouverts sont au nombre de trois, aussi bien pour les ouvertures externes que pour les ouvertures internes. Preferably, there are three open sectors, both for external openings and for internal openings.

Une forme d'exécution de l'invention. est ci-après décrite, à titre d'exemple, en référen.ce aux dessins annexés dans lesquels
la figure 1 est une vue en. élévation du premier rotor
la figure 2 est une vue en élévation du deuxième rotor.An embodiment of the invention. is described below, by way of example, with reference to the accompanying drawings in which
Figure 1 is a view. elevation of the first rotor
Figure 2 is an elevational view of the second rotor.

un dispositif de direction assistée d'un véhicule suivant la présente addition est, dans son ensemble, analogue à celui qui a été décrit au Brevet Principal. Les chiffres de référence du Brevet Principal ont été adoptés aux figures 1 et 2 de la présente addition mais sont suivis de l'indice prime. a power steering device of a vehicle according to the present addition is, as a whole, similar to that which has been described in the main patent. The benchmarks for the Main Patent have been adopted in Figures 1 and 2 of this addition but are followed by the prime index.

En particulier, ce dispositif comporte un distributeur, lequel se compose d'un premier rotor 40' et d'un deuxième rotor 41', qui sont enveloppés par un stator et qui sont respectivement solidaires en rotation des deux parties de la colonne de direction. In particular, this device comprises a distributor, which consists of a first rotor 40 'and a second rotor 41', which are surrounded by a stator and which are respectively rotatably integral with the two parts of the steering column.

Commedans le Brevet Principal, le premier rotor 40' consiste (figure 1) en un disque ayant un perçage central cannelé 42', ainsi que des passages.48' formés par des ouvertures externes. Ces ouvertures externes 48' consistent en trois secteurs ouverts, disposés avec une symétrie circulaire. As in the main patent, the first rotor 40 'consists (FIG. 1) of a disc having a fluted central bore 42', as well as passages. 48 'formed by external openings. These external openings 48 'consist of three open sectors, arranged with a circular symmetry.

Le premier rotor 40' comporte également des passages 50' qui consistent en. des ouvertures internes. Ces ouvertures internes 50' sont formées en trois secteurs ouverts disposés avec une symetrie circulaire et altern.ée avec les secteurs périphériques 48'. The first rotor 40 'also has passages 50' which consist of. internal openings. These internal openings 50 'are formed into three open sectors arranged with a circular symmetry and alternated with the peripheral sectors 48'.

Le deuxième rotor (figure 2) consiste en un disque 41' ayant un perçage central ean.nelé 45'. Le disque 41' présente trois passages 51' et trois autres passages 52', lesquels sont alternés avec les passages 51'. Les divers passages 51',52' du deuxième rotor 41' coopèrent avec les divers passages 48',50' du prémier rotor 40', de la même façon que les passages 48,50 et 51,52 du dispositif décrit au Brevet Principal. The second rotor (Figure 2) consists of a disc 41 'having a central bore ean.nelé 45'. The disc 41 'has three passages 51' and three other passages 52 ', which are alternated with the passages 51'. The various passages 51 ', 52' of the second rotor 41 'cooperate with the various passages 48', 50 'of the first rotor 40', in the same way as the passages 48.50 and 51.52 of the device described in the main patent.

Le fonctionnement est analogue à celui qui a été décrit au Brevet Principal. The operation is analogous to that which has been described in the main patent.

On appréciera la construction simple et robuste du premier rotor 40' qui, ainsi qu'on le voit à la figure 1, a une forme annulaire tortueuse. On notera également que ce premier rotor 40' est d'une fabrication commode.  We appreciate the simple and robust construction of the first rotor 40 'which, as seen in Figure 1, has a tortuous annular shape. It will also be noted that this first rotor 40 ′ is of convenient manufacture.

Claims (2)

REVENDICAT ioeCLAIMS ioe 1) Dispositif de direction assistée d'un véhicule suivant l'une quelconque des revendications du Brevet Principal, com- portant des moyens pilotes agissant sur des moyens de braquage, lesdits moyens pilotes ayant un élément de transmission en deux parties, lesquelles sont prévues avec un jeu angulaire relatif limité permettant un décalage angulaire entre lesdites parties sous l'action desdits moyens pilotes, et des moyens d' assistance, qui, en réponse à un tel décalage angulaire, sont admis à agir sur les moyens de braquage dans le même sens que les moyens pilotes, dispositif dans lequel lesdits moyens d' assistance comportent une centrale hydraulique ayant des moyen.s de pression de fluide et un réservoir, un actuateur agissant sur les moyens de braquage, et un distributeur hydraulique interposé entre la centrale et l'actuateur, ledit distributeur comportant un. stator ayant un orifice de pression., relié aux moyen.s de pression. de fluide, un orifice de retour relié au réservoir et deux orifices de service, reliés à l'actuateur et deux rotors adjacents qui sont enveloppés par le stator et qui sont respectivement solidaires en rotation. des deux dites parties de l'élément de transmission, un premier desdits rotors ayant des passages de distribution coopérant avec les orifices de pression et de retour du stator, tandis que le deuxième rotor a des passages de distribution qui coopèrent tant avec les passages de distribution du premier rotor qu'avec les orifices de service du stator, les orifices de pression et de retour du stator communiquant respectivement avec deux chambres situées en regard de l'épaisseur du premier rotor, l'une de ces chambres étant périphérique et communiquant directement avec des passages du premier rotor qui con.sistent en des ouverturessuivant la périphérie externe du premier rotor, tandis que l'autre chambre est centrale et communique directement avec d'autres passages du premier rotor qui consistent en des ouvertures suivant la périphérie interne du premier rotor, dispositif caractérisé en ce que les ouvertures externes et les ouvertures internes du premier rotor consistent en des secteurs ouverts alternés, ledit premier rotor ayant ainsi une forme annulaire tortueuse 1) power steering device of a vehicle according to any one of the claims of the main patent, comprising pilot means acting on steering means, said pilot means having a transmission element in two parts, which are provided with a limited relative angular play allowing an angular offset between said parts under the action of said pilot means, and assistance means, which, in response to such angular offset, are allowed to act on the steering means in the same direction that the pilot means, a device in which said assistance means comprise a hydraulic power station having fluid pressure means and a reservoir, an actuator acting on the steering means, and a hydraulic distributor interposed between the power station and the actuator, said distributor comprising a. stator having a pressure port., connected to the pressure means. of fluid, a return orifice connected to the reservoir and two service orifices, connected to the actuator and two adjacent rotors which are surrounded by the stator and which are respectively integral in rotation. of the two said parts of the transmission element, a first of said rotors having distribution passages cooperating with the pressure and return orifices of the stator, while the second rotor has distribution passages which cooperate with both the distribution passages of the first rotor than with the stator service orifices, the pressure and return orifices of the stator communicating respectively with two chambers located opposite the thickness of the first rotor, one of these chambers being peripheral and communicating directly with passages of the first rotor which consist of openings following the external periphery of the first rotor, while the other chamber is central and communicates directly with other passages of the first rotor which consist of openings along the internal periphery of the first rotor , device characterized in that the external openings and the internal openings of the first rotor consist of sectors or alternate green, said first rotor thus having a tortuous annular shape 2) Dispositif suivant la revendication 1, caractérisé en ce que lesdits secteurs ouverts sont au nombre de trois aussi bien pour les ouvertures extern.es que pour les ouvertures intesla  2) Device according to claim 1, characterized in that said open sectors are three in number as well for extern.es openings as for intesla openings
FR8112714A 1980-07-17 1981-06-29 Vehicle power-assisted steering device - has first rotor located axially within chambers in which stator pressure and return orifices communicate Granted FR2508406A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8112714A FR2508406A2 (en) 1981-06-29 1981-06-29 Vehicle power-assisted steering device - has first rotor located axially within chambers in which stator pressure and return orifices communicate
GB8121125A GB2082130B (en) 1980-07-17 1981-07-08 Power-assisted steering device for a vehicle
US06/283,155 US4434706A (en) 1980-07-17 1981-07-14 Power-assisted steering device for a vehicle
DE19813128368 DE3128368A1 (en) 1980-07-17 1981-07-17 "VEHICLE POWER STEERING"

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8112714A FR2508406A2 (en) 1981-06-29 1981-06-29 Vehicle power-assisted steering device - has first rotor located axially within chambers in which stator pressure and return orifices communicate

Publications (2)

Publication Number Publication Date
FR2508406A2 true FR2508406A2 (en) 1982-12-31
FR2508406B2 FR2508406B2 (en) 1983-12-09

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FR8112714A Granted FR2508406A2 (en) 1980-07-17 1981-06-29 Vehicle power-assisted steering device - has first rotor located axially within chambers in which stator pressure and return orifices communicate

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FR (1) FR2508406A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1195710A (en) * 1967-08-16 1970-06-24 Cam Gears Luton Ltd Formerly H Improvements relating to power assisted steering and like systems
EP0004212A1 (en) * 1978-02-23 1979-09-19 Valeo Servosteering arrangement for a vehicle
FR2452409A1 (en) * 1979-03-26 1980-10-24 Ferodo Sa POWER ASSISTED STEERING DEVICE AND MANUFACTURING METHOD THEREOF

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1195710A (en) * 1967-08-16 1970-06-24 Cam Gears Luton Ltd Formerly H Improvements relating to power assisted steering and like systems
EP0004212A1 (en) * 1978-02-23 1979-09-19 Valeo Servosteering arrangement for a vehicle
FR2452409A1 (en) * 1979-03-26 1980-10-24 Ferodo Sa POWER ASSISTED STEERING DEVICE AND MANUFACTURING METHOD THEREOF

Also Published As

Publication number Publication date
FR2508406B2 (en) 1983-12-09

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