EP1644644B1 - Hydraulic distributor with torque slits - Google Patents

Hydraulic distributor with torque slits Download PDF

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Publication number
EP1644644B1
EP1644644B1 EP04767490A EP04767490A EP1644644B1 EP 1644644 B1 EP1644644 B1 EP 1644644B1 EP 04767490 A EP04767490 A EP 04767490A EP 04767490 A EP04767490 A EP 04767490A EP 1644644 B1 EP1644644 B1 EP 1644644B1
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EP
European Patent Office
Prior art keywords
slide
hydraulic
bore
fluid
slots
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.)
Expired - Lifetime
Application number
EP04767490A
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German (de)
French (fr)
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EP1644644A1 (en
Inventor
Michel Rivolier
Armin Steinhilber
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.)
Bosch Rexroth DSI SAS
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Bosch Rexroth DSI SAS
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Publication of EP1644644A1 publication Critical patent/EP1644644A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F15B13/0403—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves a secondary valve member sliding within the main spool, e.g. for regeneration flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve
    • Y10T137/86694—Piston valve
    • Y10T137/86702—With internal flow passage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve
    • Y10T137/86694—Piston valve
    • Y10T137/8671—With annular passage [e.g., spool]

Definitions

  • the present invention relates to hydraulic distributors and in particular hydraulic distributors with flow distribution regardless of the load.
  • the present invention aims to provide a hydraulic distributor that overcomes the aforementioned drawbacks that is to say, it allows the control of a hydraulic receiver smoothly at startup, especially when the movement provided must be slow.
  • the hydraulic distributor of the aforementioned type further comprises two secondary non-return valves which are respectively mounted in the longitudinal channels, upstream of the heads of the main check valves, and in that the flaps secondary are connected to torque slots which open into the bore in which the drawer moves, the distributor being characterized in that each of these slots is connected, in at least one position of the drawer, to a branch of the bridge; food.
  • the secondary check valves are open during the exhaust phases of the hydraulic fluid in the section of the drawer opposite the load pressure in the working orifice.
  • the torque slots are of circular cross section.
  • the torque slots are oblong in cross section.
  • the torque slots are of lenticular cross-section.
  • the single figure is a cross-sectional view of the hydraulic distributor according to the present invention.
  • the hydraulic distributor 1 shown in the figure comprises a body 2 in which are provided a port P for the admission of a fluid under pressure, a return port T of the fluid to a reservoir (not shown), as well as two working ports A and B which are each intended to be connected to at least one hydraulic receiver (not shown).
  • the inlet port P is in the form of a channel which passes through the body 1 transversely to the plane of the drawing and which opens on the two main faces of the body serving as a support when stacking side by side of several distributors such as the one shown in the figure.
  • the orifice T consists of one or two channels passing through the body 1 transversely to the plane of the drawing.
  • the distributor 1 also has a bore 4 which passes longitudinally through the body 1, opening on the two opposite faces 5 and 6 of this body, and in which a slide 8 is mounted.
  • the drawer 8 is able to slide in this bore in a back and forth movement in the directions defined by the double arrow F.
  • the body 2 and the slide 8 comprise passages and / or grooves arranged so as to cooperate in order to establish connections or desired closures of the orifices P, T, A and B depending on the position occupied by the drawer 8.
  • the body 2 has a feed chamber 10 which is associated with the slide 8 and which is in permanent communication with the inlet port P.
  • a passage 12 which selectively communicates with the working orifices A and B as a function of the displacement of the slide 8 and which has a housing 13 in which are implanted regulating means 15 themselves associated to a well-known charge detection line channel 16.
  • a feed bridge 20 is formed in the body 1 and comprises two branches 21 and 22 which open respectively into the bore 4 in which the drawer 8 moves. Each of these branches is located on either side the supply chamber 10 and the passage 12 to be respectively selectively connected to the orifices P, A, and B.
  • the drawer 8 internally has two main check valves 25 and 26 which are arranged to be respectively interposed between the supply bridge 20 and the working orifices A and B.
  • Each of the nonreturn valves 25 and 26 has a movable valve head 31, 32 which are each located within a longitudinal channel 33, 34.
  • Each of these channels 33, 34 has transverse feed slots 35, 36 which extend transversely inside the drawer 8 to open into the bore 4.
  • feed slots 35, 36 are arranged such that, in the rest position as shown in the figure, they are closed by the walls of the bore 4. They are selectively placed in communication with the orifices P, A or B by moving the drawer 8.
  • the distributor 1 further comprises two secondary non-return valves 40 and 41 which are respectively mounted in the longitudinal channels 33, 34, upstream of the heads 31, 32 of the main non-return valves 25 and 26.
  • each of the secondary valves 40 and 41 consists of a spring 42, 43 which bears on the head 31, 32 of the main valves and which urges a ball or valve head 44, 45.
  • torque slots 50, 51 extend transversely inside the drawer 8 in order to open into the bore 4.
  • the arrangement of these slots is adapted so that in the rest position of the slide 8, the torque slots 50, 51 open respectively into the branches 21 and 22 of the feed bridge 20.
  • the secondary check valves 40 and 41 open during the exhaust phases of the hydraulic fluid, in the opposite capacity to the load and remain closed when the pressure in the supply bridge 20 is less than the load which reigns in A or B.
  • the torque slots 50 and 51 may take any form adapted to the particular use of the dispenser in which they are implanted. They are formed in particular by transverse channels formed in the drawer and which open on the surface of this drawer according to orifices of particular shape.
  • the torque slots open into orifices of circular cross section.
  • they may be of oblong cross section and in another variant, they are of lenticular or prismatic transverse shape.
  • torque slots 50, 51 are open or closed depending on the movement of the slide 8 and the particular application dedicated to the distributor in which they are mounted.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Check Valves (AREA)

Abstract

The hydraulic distributor, consisting of a housing (2) with an inlet (P), a return port (T), two or more working ports (A, B), a slide valve (8) and a regulator (15), has two secondary non-return valves (40, 41) located in lengthwise channels (33, 34) upstream of the heads (31, 32) of its primary non-return valves (25, 26). The secondary non-return valves are connected via slots (50, 51) to the bore (4) containing the distributor's slide valve and are open during the hydraulic fluid escape phases in the slide valve section opposite the load pressure in the working ports.

Description

La présente invention est relative aux distributeurs hydrauliques et notamment aux distributeurs hydrauliques à répartition de débit indépendamment de la charge.The present invention relates to hydraulic distributors and in particular hydraulic distributors with flow distribution regardless of the load.

On connaît des distributeurs hydrauliques (voire, par exemple, le document US 3707988) comprenant :

  • un corps de distributeur,
  • un orifice d'admission de fluide hydraulique sous pression qui est destiné à être raccordé à une source de fluide hydraulique sous pression,
  • un orifice de retour de fluide vers un réservoir,
  • au moins deux orifices de travail qui sont chacun destinés à être raccordés à au moins un récepteur hydraulique pour permettre le départ et le retour du fluide,
  • un tiroir logé dans un alésage ménagé dans le corps et qui est destiné à être déplacé longitudinalement pour une transmission sélective du fluide hydraulique sous pression vers les orifices de travail à partir de l'orifice d'admission,
  • un passage ménagé dans le corps pour relier sélectivement l'orifice d'admission avec les orifices de travail,
  • des moyens de régulation qui sont situés dans ledit passage pour être interposés entre l'orifice d'admission et les orifices de travail, et qui sont associés à un canal de ligne de détection de charge,
  • un pont d'alimentation qui comprend deux branches débouchant chacune dans l'alésage du tiroir, de part et d'autre de l'orifice d'admission pour être reliées respectivement aux moyens de régulation et à l'orifice de retour de fluide, et
  • deux clapets anti-retour principaux qui sont portés intérieurement par le tiroir, en étant respectivement interposés entre le pont d'alimentation et les orifices de travail, et qui comprennent chacun une tête de clapet mobile dans un canal longitudinal lui-même relié à au moins une fente d'alimentation transversale qui débouche dans l'alésage.
Hydraulic distributors are known (see for example US 3707988) comprising:
  • a distributor body,
  • a pressurized hydraulic fluid inlet which is intended to be connected to a source of hydraulic fluid under pressure,
  • a fluid return port to a reservoir,
  • at least two working ports which are each intended to be connected to at least one hydraulic receiver to allow the flow and return of the fluid,
  • a drawer housed in a bore in the body and which is to be moved longitudinally for selective transmission of the pressurized hydraulic fluid to the working ports from the inlet port,
  • a passageway in the body for selectively connecting the inlet port to the working orifices,
  • control means which are located in said passage to be interposed between the intake port and the working ports, and which are associated with a charge detection line channel,
  • a feed bridge which comprises two branches each opening into the bore of the slide, on either side of the inlet orifice to be respectively connected to the regulating means and to the fluid return orifice, and
  • two main non-return valves which are carried internally by the slide, respectively being interposed between the supply bridge and the working orifices, and which each comprise a movable valve head in a longitudinal channel which is itself connected to at least one a transverse feed slot which opens into the bore.

Même si de tels distributeurs hydrauliques donnent entièrement satisfaction quant à la répartition du débit de fluide hydraulique indépendamment de la pression de charge et de l'état de saturation de la pompe hydraulique, ils présentent l'inconvénient de provoquer des à-coups au moment de la mise en mouvement du ou des récepteurs reliés à ce distributeur.Even if such hydraulic distributors give complete satisfaction with the distribution of the flow of hydraulic fluid independently of the pressure of the load and the state of saturation of the hydraulic pump, they have the disadvantage of causing jolts at the same time. moment of setting in motion the receiver or receivers connected to this distributor.

L'opérateur doit alors compenser ces mouvements, en fonction de son expérience, ce qui ne constitue pas une solution satisfaisante.The operator must then compensate for these movements, based on his experience, which is not a satisfactory solution.

En conséquence, la présente invention a pour but de fournir un distributeur hydraulique qui remédie aux inconvénients précités c'est-à-dire qu'il permet la commande d'un récepteur hydraulique sans à-coups au démarrage, et ce notamment lorsque le mouvement fourni doit être lent.
A cet effet, selon la présente invention, le distributeur hydraulique du type précité comprend en outre deux clapets anti-retour secondaires qui sont respectivement montés dans les canaux longitudinaux, en amont des têtes des clapets anti-retour principaux, et en ce que les clapets secondaires sont reliés à des fentes de couple qui débouchent dans l'alésage dans lequel se déplace le tiroir, le distributeur étant caractérisé en ce que chacune de ces fentes est reliée, dans au moins une position du tiroir, à une branche du pont d'alimentation.Accordingly, the present invention aims to provide a hydraulic distributor that overcomes the aforementioned drawbacks that is to say, it allows the control of a hydraulic receiver smoothly at startup, especially when the movement provided must be slow.
For this purpose, according to the present invention, the hydraulic distributor of the aforementioned type further comprises two secondary non-return valves which are respectively mounted in the longitudinal channels, upstream of the heads of the main check valves, and in that the flaps secondary are connected to torque slots which open into the bore in which the drawer moves, the distributor being characterized in that each of these slots is connected, in at least one position of the drawer, to a branch of the bridge; food.

Ainsi, grâce à ces dispositions, l'écoulement du fluide hydraulique lors de la commande d'un récepteur est beaucoup plus progressif de sorte qu'aucun à-coups n'est ressenti.Thus, thanks to these provisions, the flow of the hydraulic fluid during the control of a receiver is much more progressive so that no jolts are felt.

Avantageusement, les clapets anti-retour secondaires sont ouverts lors des phases d'échappement du fluide hydraulique dans le tronçon du tiroir opposé à la pression de charge dans l'orifice de travail.Advantageously, the secondary check valves are open during the exhaust phases of the hydraulic fluid in the section of the drawer opposite the load pressure in the working orifice.

De manière préférée, les fentes de couple sont de section transversale circulaire.Preferably, the torque slots are of circular cross section.

En variante, les fentes de couple sont de section transversale oblongue.Alternatively, the torque slots are oblong in cross section.

Dans encore une autre variante, les fentes de couple sont de section transversale lenticulaire.In yet another variant, the torque slots are of lenticular cross-section.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé, représentant à titre d'exemple non limitatif, une forme de réalisation préférentielle d'un distributeur hydraulique selon la présente invention.In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing, representing by way of nonlimiting example, a preferred embodiment of a hydraulic distributor according to the present invention. .

La figure unique est une vue en coupe transversale du distributeur hydraulique selon la présente invention..The single figure is a cross-sectional view of the hydraulic distributor according to the present invention.

Le distributeur hydraulique 1 représenté à la figure comporte un corps 2 dans lequel sont ménagés un orifice P d'admission d'un fluide sous pression, un orifice de retour T du fluide vers un réservoir (non représenté), ainsi que deux orifices de travail A et B qui sont chacun destinés à être raccordés à au moins un récepteur hydraulique (non représenté).The hydraulic distributor 1 shown in the figure comprises a body 2 in which are provided a port P for the admission of a fluid under pressure, a return port T of the fluid to a reservoir (not shown), as well as two working ports A and B which are each intended to be connected to at least one hydraulic receiver (not shown).

L'orifice d'admission P se présente sous la forme d'un canal qui traverse le corps 1 transversalement au plan du dessin et qui débouche sur les deux faces principales du corps servant d'appui lors de l'empilage côte à côte de plusieurs distributeurs tels que celui représenté à la figure. De même, l'orifice T est constitué d'un ou de deux canaux traversant le corps 1 transversalement au plan du dessin.The inlet port P is in the form of a channel which passes through the body 1 transversely to the plane of the drawing and which opens on the two main faces of the body serving as a support when stacking side by side of several distributors such as the one shown in the figure. Similarly, the orifice T consists of one or two channels passing through the body 1 transversely to the plane of the drawing.

Le distributeur 1 possède en outre un alésage 4 qui traverse longitudinalement le corps 1 en débouchant sur les deux faces opposées 5 et 6 de ce corps, et dans lequel est monté un tiroir 8.The distributor 1 also has a bore 4 which passes longitudinally through the body 1, opening on the two opposite faces 5 and 6 of this body, and in which a slide 8 is mounted.

Le tiroir 8 est apte à coulisser dans cet alésage dans un mouvement de va et vient selon les sens définis par la double flèche F.The drawer 8 is able to slide in this bore in a back and forth movement in the directions defined by the double arrow F.

De façon classique, le corps 2 et le tiroir 8 comportent des passages et/ou des gorges agencés de manière à coopérer en vue d'établir des connexions ou des fermetures souhaitées des orifices P, T, A et B en fonction de la position occupée par le tiroir 8.Conventionally, the body 2 and the slide 8 comprise passages and / or grooves arranged so as to cooperate in order to establish connections or desired closures of the orifices P, T, A and B depending on the position occupied by the drawer 8.

En outre, le corps 2 possède une chambre d'alimentation 10 qui est associée au tiroir 8 et qui est en communication permanente avec l'orifice d'admission P.In addition, the body 2 has a feed chamber 10 which is associated with the slide 8 and which is in permanent communication with the inlet port P.

A proximité de cette chambre d'alimentation 10 débouche un passage 12 qui communique sélectivement avec les orifices de travail A et B en fonction du déplacement du tiroir 8 et qui possède un logement 13 dans lequel sont implantés des moyens de régulation 15 eux-mêmes associés à un canal de ligne de détection de charge 16 bien connu en soi.Close to this feed chamber 10 opens a passage 12 which selectively communicates with the working orifices A and B as a function of the displacement of the slide 8 and which has a housing 13 in which are implanted regulating means 15 themselves associated to a well-known charge detection line channel 16.

Par ailleurs, un pont d'alimentation 20 est ménagé dans le corps 1 et comprend deux branches 21 et 22 qui débouchent respectivement dans l'alésage 4 dans lequel se déplace le tiroir 8. Chacune de ces branches est située de part et d'autre de la chambre d'alimentation 10 et du passage 12 pour être respectivement sélectivement reliée aux orifices P, A, et B.Furthermore, a feed bridge 20 is formed in the body 1 and comprises two branches 21 and 22 which open respectively into the bore 4 in which the drawer 8 moves. Each of these branches is located on either side the supply chamber 10 and the passage 12 to be respectively selectively connected to the orifices P, A, and B.

Le tiroir 8 possède intérieurement deux clapets anti-retour principaux 25 et 26 qui sont agencés de manière à être respectivement interposés entre le pont d'alimentation 20 et les orifices de travail A et B.The drawer 8 internally has two main check valves 25 and 26 which are arranged to be respectively interposed between the supply bridge 20 and the working orifices A and B.

Chacun des clapets anti-retour 25 et 26 possède une tête de clapet mobile 31, 32 qui sont chacune situées à l'intérieur d'un canal longitudinal 33, 34. Chacun de ces canaux 33, 34 possède des fentes d'alimentation transversales 35, 36 qui s'étendent transversalement à l'intérieur du tiroir 8 pour déboucher dans l'alésage 4.Each of the nonreturn valves 25 and 26 has a movable valve head 31, 32 which are each located within a longitudinal channel 33, 34. Each of these channels 33, 34 has transverse feed slots 35, 36 which extend transversely inside the drawer 8 to open into the bore 4.

Ces fentes d'alimentation 35, 36 sont ménagées de telle manière que, en position de repos telle que représentée à la figure, elles soient obturées par les parois de l'alésage 4. Elles sont sélectivement mises en communication avec les orifices P, A ou B par le déplacement du tiroir 8.These feed slots 35, 36 are arranged such that, in the rest position as shown in the figure, they are closed by the walls of the bore 4. They are selectively placed in communication with the orifices P, A or B by moving the drawer 8.

Selon une caractéristique essentielle de la présente invention, le distributeur 1 comprend en outre deux clapets anti-retour secondaires 40 et 41 qui sont respectivement montés dans les canaux longitudinaux 33, 34, en amont des têtes 31, 32 des clapets anti-retour principaux 25 et 26. Ainsi, chacun des clapets secondaires 40 et 41 est constitué d'un ressort 42, 43 qui prend appui sur la tête 31, 32 des clapets principaux et qui sollicite une bille ou tête de clapet 44, 45.According to an essential characteristic of the present invention, the distributor 1 further comprises two secondary non-return valves 40 and 41 which are respectively mounted in the longitudinal channels 33, 34, upstream of the heads 31, 32 of the main non-return valves 25 and 26. Thus, each of the secondary valves 40 and 41 consists of a spring 42, 43 which bears on the head 31, 32 of the main valves and which urges a ball or valve head 44, 45.

En amont de chacune des billes, c'est-à-dire entre l'extrémité de chacun des canaux 33, 34 et les billes 44, 45, des fentes de couple 50, 51 s'étendent transversalement à l'intérieur du tiroir 8 pour déboucher dans l'alésage 4. L'agencement de ces fentes est adapté pour qu'en position de repos du tiroir 8, les fentes de couple 50, 51 débouchent respectivement dans les branches 21 et 22 du pont d'alimentation 20.Upstream of each of the balls, that is to say between the end of each of the channels 33, 34 and the balls 44, 45, torque slots 50, 51 extend transversely inside the drawer 8 in order to open into the bore 4. The arrangement of these slots is adapted so that in the rest position of the slide 8, the torque slots 50, 51 open respectively into the branches 21 and 22 of the feed bridge 20.

Les clapets anti-retour secondaires 40 et 41 s'ouvrent lors des phases d'échappement du fluide hydraulique, dans la capacité opposée à la charge et restent fermées lorsque la pression qui règne dans le pont d'alimentation 20 est inférieure à la charge qui règne en A ou B.The secondary check valves 40 and 41 open during the exhaust phases of the hydraulic fluid, in the opposite capacity to the load and remain closed when the pressure in the supply bridge 20 is less than the load which reigns in A or B.

Les fentes de couple 50 et 51 peuvent prendre toute forme adaptée à l'utilisation particulière du distributeur dans lequel elles sont implantées. Elles sont notamment formées par des canaux transversaux ménagés dans le tiroir et qui débouchent à la surface de ce tiroir selon des orifices de forme particulière.The torque slots 50 and 51 may take any form adapted to the particular use of the dispenser in which they are implanted. They are formed in particular by transverse channels formed in the drawer and which open on the surface of this drawer according to orifices of particular shape.

Dans une première forme de réalisation, les fentes de couple débouchent selon des orifices de section transversale circulaire. En variante, elles peuvent être de section transversale oblongue et dans encore une autre variante, elles sont de forme transversale lenticulaire ou encore prismatique.In a first embodiment, the torque slots open into orifices of circular cross section. Alternatively, they may be of oblong cross section and in another variant, they are of lenticular or prismatic transverse shape.

Ces fentes de couple 50, 51 sont ouvertes ou fermées en fonction du déplacement du tiroir 8 et de l'application particulière dédiée au distributeur dans lequel elles sont montées.These torque slots 50, 51 are open or closed depending on the movement of the slide 8 and the particular application dedicated to the distributor in which they are mounted.

Comme il va de soi, l'invention ne se limite pas à la forme de réalisation préférentielle décrite ci-dessus à titre d'exemple non limitatif ; elle en embrasse au contraire toutes les variantes de réalisation dans le cadre des revendications ci-après.It goes without saying that the invention is not limited to the preferred embodiment described above by way of non-limiting example; on the contrary, it embraces all the variants within the scope of the following claims.

Claims (5)

  1. Hydraulic distributor, comprising:
    - a distributor body (2);
    - an intake aperture (P) for pressurised hydraulic fluid which is designed to be connected to a source of pressurised hydraulic fluid;
    - an aperture for return (T) of fluid to a reservoir;
    - at least two work apertures (A, B), each of which is designed to be connected to at least one hydraulic recipient in order to permit emission and return of the fluid;
    - a slide (8) which is accommodated in a bore (4) provided in the body (2), and is designed to be displaced longitudinally for selective conveying of the pressurised hydraulic fluid to the work apertures (A, B) from the intake aperture (P);
    - a passage (12) which is provided in the body (2) in order to connect the intake aperture (P) selectively to the work apertures (A, B);
    - regulation means (15) which are situated in the said passage (12), in order to be interposed between the intake aperture (P) and the work apertures (A, B), and which are associated with a load detection line channel (16);
    - a supply bridge (20) which comprises two branches (21, 22), each of which opens into the bore (4) in the slide (8), on both sides of the intake aperture (P), in order to be connected respectively selectively to the said fluid apertures; and
    - two main non-return valves (25, 26) which are supported on the interior of the slide (8), whilst being interposed respectively between the supply bridge (20) and the work apertures (A, B), and which each comprise a valve head (31, 32) which is mobile in a longitudinal channel (33, 34), which itself is connected to at least one transverse supply slot (35, 36) which opens into the bore (4);
    two secondary non-return valves (40, 41) which are fitted respectively in the longitudinal channels (33, 34) upstream from the heads (31, 32) of the main non-return valves (25, 26), the secondary valves being connected to couple slots (50, 51) which open into the bore (4) in which the slide (8) is displaced, characterised in that each of these slots is connected, in at least one position of the slide (8), to a branch of the supply bridge (20).
  2. Hydraulic distributor according to claim 1, characterised in that the secondary non-return valves (40, 41) are open during phases of escape of the hydraulic fluid into the section of the slide (8) in opposition to the pressure of loading into the work aperture (A, B).
  3. Hydraulic distributor according to claim 2, characterised in that the couple slots (50, 51) have a circular transverse cross-section.
  4. Hydraulic distributor according to claim 2, characterised in that the couple slots (50, 51) have an oblong transverse cross-section.
  5. Hydraulic distributor according to claim 2, characterised in that the couple slots (50, 51) have a lenticular transverse cross-section.
EP04767490A 2003-07-16 2004-06-28 Hydraulic distributor with torque slits Expired - Lifetime EP1644644B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0308685A FR2857704B1 (en) 2003-07-16 2003-07-16 HYDRAULIC DISTRIBUTOR WITH TORQUE SLOTS
PCT/FR2004/001644 WO2005017364A1 (en) 2003-07-16 2004-06-28 Hydraulic distributor with torque slits

Publications (2)

Publication Number Publication Date
EP1644644A1 EP1644644A1 (en) 2006-04-12
EP1644644B1 true EP1644644B1 (en) 2006-11-15

Family

ID=33548179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04767490A Expired - Lifetime EP1644644B1 (en) 2003-07-16 2004-06-28 Hydraulic distributor with torque slits

Country Status (8)

Country Link
US (1) US7581562B2 (en)
EP (1) EP1644644B1 (en)
JP (1) JP4560515B2 (en)
CN (1) CN100389269C (en)
AT (1) ATE345446T1 (en)
DE (1) DE602004003250T2 (en)
FR (1) FR2857704B1 (en)
WO (1) WO2005017364A1 (en)

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Publication number Priority date Publication date Assignee Title
EP1872018B1 (en) * 2005-04-20 2008-08-06 Bucher Hydraulics AG Pilot valve for a hydraulic motor
US7921878B2 (en) * 2006-06-30 2011-04-12 Parker Hannifin Corporation Control valve with load sense signal conditioning
FR2966279A1 (en) * 2011-01-12 2012-04-20 Bosch Rexroth Dsi Sas Power or control device for e.g. agricultural vehicle, has adjusting unit that is provided for adjusting intensity of current applied at terminals of reel with respect to electrical current applied at terminals of position maintaining units
JP5602074B2 (en) * 2011-03-16 2014-10-08 カヤバ工業株式会社 Control valve
JP6338428B2 (en) * 2014-04-11 2018-06-06 Ｋｙｂ株式会社 Valve structure
EP3201475B1 (en) * 2014-09-29 2018-12-19 Parker Hannifin Corporation Directional control valve
WO2024027913A1 (en) * 2022-08-03 2024-02-08 Xcmg European Research Center Gmbh Valve assembly for controlling at least one connection of a hydraulic load

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Also Published As

Publication number Publication date
CN1829864A (en) 2006-09-06
FR2857704B1 (en) 2007-12-28
ATE345446T1 (en) 2006-12-15
JP2007516388A (en) 2007-06-21
WO2005017364A1 (en) 2005-02-24
DE602004003250T2 (en) 2007-04-19
DE602004003250D1 (en) 2006-12-28
FR2857704A1 (en) 2005-01-21
US7581562B2 (en) 2009-09-01
EP1644644A1 (en) 2006-04-12
US20060137751A1 (en) 2006-06-29
CN100389269C (en) 2008-05-21
JP4560515B2 (en) 2010-10-13

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