EP2344773A1 - Dispositif de regulation de pression, notamment du type telecommande hydraulique - Google Patents
Dispositif de regulation de pression, notamment du type telecommande hydrauliqueInfo
- Publication number
- EP2344773A1 EP2344773A1 EP09760165A EP09760165A EP2344773A1 EP 2344773 A1 EP2344773 A1 EP 2344773A1 EP 09760165 A EP09760165 A EP 09760165A EP 09760165 A EP09760165 A EP 09760165A EP 2344773 A1 EP2344773 A1 EP 2344773A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- damping
- control
- cavity
- pushers
- pistons
- 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
Links
- 238000013016 damping Methods 0.000 claims abstract description 133
- 230000002093 peripheral effect Effects 0.000 claims abstract description 39
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims description 28
- 238000004891 communication Methods 0.000 claims description 27
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 230000033001 locomotion Effects 0.000 claims description 13
- 239000005557 antagonist Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000013519 translation Methods 0.000 description 8
- 230000003042 antagnostic effect Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
-
- 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
- Y10T137/2278—Pressure modulating relays or followers
-
- 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
- Y10T137/87056—With selective motion for plural valve actuator
-
- 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
- Y10T137/87056—With selective motion for plural valve actuator
- Y10T137/87064—Oppositely movable cam surfaces
-
- 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
- Y10T137/87169—Supply and exhaust
-
- 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
- Y10T137/87169—Supply and exhaust
- Y10T137/87233—Biased exhaust valve
- Y10T137/87241—Biased closed
Definitions
- Pressure regulating device in particular of the hydraulic remote control type
- the present invention relates to a pressure regulating device, in particular of the hydraulic remote control type such as a hydraulic remote control for public works machinery.
- These regulation devices are used in particular to control different hydraulic functions such as the setting in motion of different receivers installed aboard these construction machines.
- the invention relates more particularly to a regulating device comprising: a body provided with two end faces, respectively lower and upper, and a peripheral face extending between the two end faces, and comprising at least one so-called control cavity opening on at least one of said faces,
- At least one pressure reducer mounted in the body and comprising a control pushbutton housed in reciprocating motion in the at least one control cavity, said pressure reducer being intended to allow the control of at least one external receiver to the regulating device,
- a control member mounted to tilt relative to the body, by means of a hinge mounted on the upper face of said body, to control the reciprocating movement of the at least one control pusher.
- control member is in the form of a lever or handle, operable manually, extended by a lower cup disposed facing the upper face of the body of the regulating device; upper face in which opens the control cavities in which are mounted movable control pushers, so that said control pushers protrude from the upper face to abut against the lower cup of the control member.
- control cavities normally extend towards the upper face of the body so that, once said body is fixed on a horizontal floor, the control cavities and the control pushers extend. vertically and the body must have a height adapted to the integration of the pressure reducer.
- the height of the body leads to a limitation of the height and a vertical space sometimes unacceptable when it comes to implement the control device in a confined space such as a driving cab of a public works machine .
- the control cavities are made by machining and are therefore generally made in the form of a hole traversing the body from side to side in the direction of the height, between the lower and upper faces.
- control cavities require the control cavities to be connected via the lower faces, and thus to bring connection pipes through the horizontal floor on which the regulating device is laid flat, thus hindering the integration of the pipes and the device. complete on the floor.
- transverse bores to the control cavities, making the realization of the body and its various cavities or conduits all the more complex.
- the control member is in the form of a tilting pedal, operable at the foot, and arranged facing the upper face of the body of the regulating device.
- a pedal can be used in construction machinery for control of forward and backward of the machine, in other words for moving back and forth or the translation of the machine.
- these control devices comprise control cavities and control pushers extending vertically with the same disadvantages as those mentioned above.
- an additional control lever is articulated on one end of the pedal and extends upwards to end with a handle that can be manipulated by hand to add control of the tilting of the pedal.
- a control lever is used to impose a tilting of the pedal from front to back, or conversely, which is more accurate than that obtained with the foot on the pedal, in particular to allow a more precise displacement of the public works machine.
- Such a control lever represents a mass located at one end of the pedal, so eccentric with respect to the articulation of the pedal, whose inertia must be fought by means of a damper.
- a damper mounted in the body and comprising two damping pushers arranged on either side of the articulation of the control member (here the pedal) and housed in movement of back and forth in a damping cavity provided in the body, said damper being intended to damp the tilting of the control member in one direction and the other, said control member pushing on the one hand the one of said damping pushers when it switches in one direction and the other of said damping pushers when it switches in the other direction.
- this damper is adapted to damp the tilting of the pedal, and in particular the tilts imposed by a control lever during the movement of the public works machine.
- the damping cavity has a general shape of "U" with two vertical portions extending normally vis-à-vis the upper face of the body and in which the respective damping pushers move, and a central part connecting the vertical parts and provided with one or more damping pistons.
- the damping pushers extend normally vis-à-vis the upper face of the body so that, once the body fixed on a horizontal floor, the damping pushers extend vertically with the same disadvantages as those mentioned above for the control pushers.
- such a damping cavity is difficult to achieve, at least by simple machining, because of its complex shape "U".
- the present invention particularly aims at all or some of the aforementioned disadvantages, and proposes for this purpose a pressure regulating device, in particular of the hydraulic remote control type, comprising: a body provided with two end faces, respectively lower and upper, and a peripheral face extending between the two end faces, and comprising at least one said control cavity opening on at least one of said faces and at least one so-called damping cavity opening on at least one of said faces,
- At least one pressure reducer mounted in the body and comprising a control pushbutton housed in reciprocating motion in the at least one control cavity, said pressure reducer being intended to allow the control of at least one external receiver to the regulating device,
- a control member mounted to tilt relative to the body, by means of a hinge mounted on the upper face of said body, for controlling the reciprocating movement of the at least one control pusher
- At least one damper mounted in the body and comprising two damping pushers disposed on either side of said hinge and reciprocally housed in said at least one damping cavity, said damper being intended damping the tilting of the control member in one direction and in the other, said control member pushing on the one hand one of said damping pushers when rocking in one direction and on the other hand another of said damping pushers when it switches in the other direction, said device being remarkable in that: the at least one control cavity has a tip end in the peripheral face of said body,
- the at least one damping cavity has two open ends in the peripheral face of said body on either side of said articulation of the control member, and the control member has parts facing the face. peripheral to face the open ends of the respectively control and damping cavities which protrude pushers respectively control and damping.
- control and damping cavities do not extend normally to the upper face of the body, and thus vertically once the device is laid flat on a horizontal floor, thus helping to limit the vertical space requirement. of the device and to obtain a saving of height space.
- the control and / or damping cavities may extend parallel to the upper face of the body, and thus horizontally once the device is laid flat on a horizontal floor.
- the control and damping cavities may not open into the lower face so that it is not necessary to connect the connecting pipes to said lower fax machines, thus facilitating the implantation. said pipes at the floor of the machine.
- the regulating device comprises a single rectilinear damping cavity passing right through the body and opening at its two ends on its peripheral face.
- the at least one control cavity is rectilinear and extends substantially parallel or inclined with respect to the damping cavity.
- this control cavity is simple to perform by machining.
- the damping cavity and the at least one control cavity extend in substantially parallel planes.
- the damper comprises a damping slide-mounted slide with adjustment in the damping cavity
- the damping cavity comprises two working chambers, with variable volume in opposite directions, extending between the two opposite ends of said damping spool and immobilized guide sleeves at the open ends of the damping cavity to guide in translation the respective damping pushers, said working chambers containing a fluid intended to pass from to one another by at least one communication passage under the effect of the thrust of one or the other damping pushers on said damping slide.
- the communication passage comprises at least one restriction zone adapted to generate a pressure drop. in said communication passage when flowing fluid passes between the two working chambers.
- the damping spool comprises, at its two respective ends, two respective end pistons sliding in the damping cavity, interconnected by a central rod, and against which the respective damping pushers are in position. stop, and wherein the communication passage between the two working chambers is formed in the damping slide between the two said end pistons.
- damping pushers mounted back to back or antagonist, abut against both ends of the damping slide.
- the communication passage comprises two end channels formed in said end pistons and a central channel formed axially in the central connecting rod between the two end pistons, said end channels putting in communication fluid the respective working chambers and the central channel.
- the central channel passes through the two end pistons from one side to the other, in which the damping push rods are sized to close off the respective outlet ends of the central channel, and in which the end channels are under the forming grooves on the end faces of the respective end pistons and fluidly communicating the respective working chambers and the respective through-ends of the central channel.
- the grooves have a generally spiral shape adapted to form a constriction in the flow of fluid between the respective working chambers and the central channel.
- the central channel is internally provided with two opposing jet nozzles designed to generate pressure drops in the flow of fluid within said central channel.
- the dispensing spool comprises two intermediate slidable seals in the damping cavity and arranged around the central rod between the end pistons, so that the distribution spool internally delimits three internal chambers volume constant, namely two internal chambers lateral members disposed between the end pistons and the adjacent intermediate pistons, and a central inner chamber disposed between the two intermediate pistons.
- the at least one pressure reducer comprises:
- a compensation chamber provided in the control cavity and in which the control pusher is movable
- a movable integral distribution slide of the plunger between a start position and an end of travel position
- said dispensing spool comprising a blind axial channel opening at the free end of said spool in the dispensing channel in order to communicate with the outlet line, said axial channel also communicating with a side channel adapted to be selectively brought into communication with the compensation chamber or inlet line to provide the pressure reducing function when the dispensing spool is moved into the distribution channel.
- the inlet line of the at least one pressure reducer opens into the central internal chamber of the damping slide
- the device further comprises a connecting line of the at least one reducer, said connecting pipe opening on the one hand in the compensation chamber of said reducer and on the other hand in one of the internal lateral chambers of the drawer.
- the device comprises two pressure reducers disposed in two respective control cavities, in which the inlet ducts of the two pressure reducers open into the central internal chamber of the damping slide, and in which the connecting duct of the one of the pressure reducers opens into one of the internal side chambers of the damping spool while the connecting line of the other of the pressure reducers opens into the other of the internal lateral chambers of the damping spool;
- the central spindle of the distribution spool comprises two channels placing the internal lateral chambers and the central channel in communication, so that the respective compensation chambers of the two pressure reducers are in communication via the connecting lines, the lateral internal chambers, said communication channels and the central channel.
- FIGS. 1 to 8 illustrate a regulating device according to the invention, in which the figures are views of the device respectively in perspective, from above, from the front, from the side, from below, in vertical section along the axis V- VI of Figures 3 and 5, in vertical section along the axis VII-VII of Figures 3 and 5, and in horizontal section along the axis VIII-VIII of Figures 3 and 4;
- FIG. 9 and 10 illustrate an alternative embodiment of a control device according to the invention, wherein the figures are views of the device identical to Figures 6 and 4 respectively.
- FIGS. 1 to 8 A regulating device according to the invention is described hereinafter with reference to FIGS. 1 to 8, which more particularly illustrate a control device designed for a foot-operated hydraulic remote control, of the hydraulic pedal type, intended for example to control the translation of a public works machine.
- the various axes are as follows, with reference to the machine intended to be equipped with the regulating device: the axis X indicates the longitudinal direction of the vehicle corresponding to the usual forward direction of the vehicle in a straight line, in other words the direction of displacement in translation, oriented from the rear to the front;
- the Y axis indicates the transverse direction of the machine, oriented from right to left, where the two axes X and Y are perpendicular and horizontal;
- - Z axis it indicates the vertical direction of the machine, oriented from bottom to top.
- the regulating device is intended to be laid flat on a horizontal floor, that is to say a floor parallel to the plane (X, Y), and fixed on the latter.
- the regulating device comprises a body 1 in which is housed two pressure reducers 2 and a damper 3, and on which a control member 4 is installed. This control member 4 is able to modify the pressure regulated by the pressure reducers 2 described below.
- the body 1 is provided with two end faces, namely a lower face 10 and an upper face 1 1, as well as a peripheral face 12, or lateral face, extending between the two end faces 10, 11.
- the end faces 10, 11 extend in a horizontal plane, while the peripheral face 12 extends vertically and forms the periphery of the body 1.
- the control member 4 is in the form of a foot pedal and comprises:
- a flat base 40 attached fixedly to the horizontal upper face 10 of the body 1, in particular by means of fixing screws 41, and supporting an axis of articulation 42 parallel to the transverse direction Y;
- a pedal 44 rotatably mounted relative to the base 40 about the hinge axis 42;
- a return means 48 of the helical spring type, mounted around the hinge pin 42 to bias said pedal 44 in the rest position illustrated in the various figures.
- the base 40 has two flaps 43 projecting normally to the base 40, where said flaps 43 are parallel to the plane (X, Z) vertical and spaced from each other according to the transverse direction Y to support the hinge axis 42 transverse.
- Pedal 44 has the general shape of an arch or inverted "U” and comprises: a planar central portion 45 having two flaps 46 parallel to the flaps 43 of the base 40 so as to also support the hinge axis 42, where the central portion 45 extends horizontally in the rest position and where said central portion 45 provides a support surface for a foot; and two laterally folded portions 47 opposite to each other in the longitudinal direction X, said laterally folded portions 47 extending at right angles to the central portion 45, in a plane parallel to the (Y, Z) plane in the rest position, and facing the peripheral face 12 of the body 1.
- the laterally folded portions 47 extend parallel to the hinge axis 42 so that, when the pedal 44 tilts, said laterally folded parts 47 approach or move more or less from the peripheral face 12, in an antagonistic manner, in the direction of tilting.
- Several cavities are formed in the body 1, namely: - a single damping cavity 30 extending rectilinearly and horizontally in the longitudinal direction X, perpendicular to the axis of rotation 42 of the pedal 44, and opening to its two opposite ends 31 in the peripheral face 12 of the body 1; and
- control cavities 20 also extending rectilinearly and horizontally in the longitudinal direction X, and opening at their respective two opposite ends 21 in the peripheral face 12 of the body 1.
- the damping cavity 30 is in the form of a bore of constant diameter over a part of its length and centered around an axis A3 parallel to the longitudinal direction X; said damping cavity 30 being obtained by a conventional machining technique and easy to implement.
- Each pressure reducer 2 comprises:
- control pusher 21 housed in reciprocating motion in the corresponding control cavity
- a compensation chamber 200 provided in the control cavity 20 and in which the control pusher 21 is movable, said compensation chamber 200 corresponding to a bore of given diameter which is centered about an axis A1 or A2 parallel to the longitudinal direction X and which opens into the peripheral face 12 of the body 1;
- a return line 22 opening into the compensation chamber 200 and connected to a source of low pressure fluid, said return line 22 opening into the lower face 11 of the body 1 and extending parallel to the vertical axis Z;
- a distribution channel 210 directly extending from the compensation chamber 200 with which it is in communication at one of its ends, said distribution channel 210 corresponding to a bore of diameter smaller than that of the compensation chamber 200 , which is centered around the same axis A1 or A2 as the adjacent compensation chamber 200, and which opens into the peripheral face 12 of the body 1, opposite the compensation chamber 200, with a plug 211 screwed to the level of the open end of said distribution channel 210; an inlet pipe 23 opening into the distribution channel 210 and connected to a source of high pressure fluid, said inlet duct 23 being formed by a bore passing through the distribution channel 210, parallel to the transverse direction Y and opening into the peripheral face 12 of the body 1, with a plug 231 screwed at the open end of said inlet pipe 23;
- An outlet pipe 24 opening into the distribution channel 210 and intended to be connected to the external receiver to be controlled, said outlet conduit 24 opening into the lower face 1 1 of the body 1 and extending parallel to the vertical axis Z ;
- a plunger 25 displaceable in translation, along the axis A1 or A2, by the control member 4, via the control pusher 21, inside the compensation chamber 200;
- pressure during the displacement of the dispensing spool 26 in the dispensing channel 210 The fluid flowing in the inlet pipe 23 and the fluid circulating in the compensation chamber 200 (and also in the return pipe 22) are respectively qualified high pressure and low pressure relative to each other, independently of any absolute value of pressure.
- the plunger 25 consists essentially of a rod extending between an enlarged head turned towards the control member 4 and a connecting leg turned towards the dispensing channel 210.
- the connecting foot of the plunger 25 is mounted integral in translation with a first end of the dispensing spool 26; the second end of said slide 26 corresponding to its free end into which the axial channel 260 opens.
- Each reducer 2 further comprises a cup 27 mounted coaxially with the rod of the plunger 25 bearing against the lower part of the enlarged head of said plunger 25 to be elastically urged by means of a first return spring 270 against the plunger 25. control 21.
- the first return spring 270 is interposed between the cup 27 and a shoulder defined in the control cavity 20, to push the cup 27 towards the control pusher 21.
- the gearbox 2 optionally comprises a second return spring 271, called the setting or regulation spring, disposed inside the first return spring 270 and interposed between a shoulder of the plunger 25 and the cup 27.
- a second return spring 271 called the setting or regulation spring
- each control pusher 21 is provided by a guide sleeve 28 immobilized at the open end of the compensation chamber 200 in the peripheral face 12 of the body 1; said guide sleeve 28 being immobilized by means of a closure plate 280 fixed to the peripheral face 12 of the body 1, in particular by means of a screw 281.
- Two peripheral grooves are formed in each guide sleeve 28, respectively at the of the inner surface and the outer surface of said sleeve 28, to accommodate seals for sealing between the control pusher 21 and respectively the sleeve 28 and the body 1.
- control cavities 20, and more particularly the compensation chambers 200 open into the peripheral face 12 of the body 1, so that the control pushers 21 partially project out of the face. device 12 of the body 1 in order to bear against the respective laterally folded portions 47 of the pedal 44.
- one of the control pushers 21 protrudes out of the body 1 to bear against one of the laterally folded parts 47, while the other of the control pushers 21 protrudes out of the body 1 to bear against the other laterally folded portions 47.
- the control pushers 21 move in an antagonistic manner, or in the opposite direction in the longitudinal direction X, under the action of the control member 4.
- the laterally folded portions 47 each support a finger 52 designed to bear against the respective control pusher 21; said finger 52 being in the form of a screw whose head offers a bearing surface, slightly rounded, for the control pusher 21 corresponding, and whose free end cooperates with a nut for fixing on the laterally folded 47 corresponding.
- the damper 3 comprises:
- each damping pusher 31 is provided by a guide sleeve 38 immobilized at the open ends of the damping chamber 30 in the peripheral face 12 of the body 1; said guide sleeve 38 being immobilized by means of the aforesaid closing plate 280 which is fixed on the peripheral face 12 of the body 1.
- Two peripheral grooves are formed in each guide sleeve 38, respectively at the inner surface and the outer surface of said sleeve 38, for receiving seals for sealing between the damping pushers 31 and respectively the respective sleeves 38 and the body 1.
- the damping slide 32 comprises:
- intermediate pistons 35 formed around the periphery of the central rod 34 and arranged spaced apart from one another between the two end pistons 34, said intermediate pistons 35 being on the one hand slidably mounted in the damping cavity 30 and on the other hand each provided with a peripheral groove on the outer surface of said intermediate pistons 35 to accommodate seals.
- the damping cavity 30 thus comprises two working chambers 300, of variable volume in opposite directions (that is, the volumes of which vary in an antagonistic manner), extending between the two opposite end pistons 33 and the guide sleeves 38. adjacent; said working chambers 300 containing a fluid for passing from one to the other by at least one communication passage under the effect of the thrust of one or the other damping pushers 31 on the one or other of the end pistons 33 of the damping slide 32.
- the damping cavity 30 opens at its two ends in the peripheral face 12 of the body 1, so that the damping pushers 31 partially project out of the peripheral face 12 of the body 1 in order to bear against the respective laterally folded portions 47 of the pedal 44.
- one of the damping pushers 31 protrudes out of the body 1 to bear against one of the laterally folded parts 47, while the other of the damping pushers 31 protrudes out of the body 1 to bear against the other of the laterally folded parts 47.
- the damping pushers 31 move in an antagonistic manner, or in the opposite direction in the longitudinal direction X, under the action of the control member 4.
- each laterally folded portion 47 each support a finger 53 designed to bear against the respective damping pusher 31; said finger 53 is in the form of a screw whose head offers a bearing surface, slightly rounded, for the damping pusher 31 corresponding, and whose free end cooperates with a nut for fixing on the part laterally folded 47 corresponding.
- each laterally folded portion 47 supports two fingers 52, 53 side by side and extending in a longitudinal plane.
- the damping slide 32 internally delimits three internal chambers with a constant volume, namely:
- a central internal chamber 320 disposed between the two intermediate pistons 35, around the central rod 34; and two lateral internal chambers 321, arranged between the end pistons 33 and the adjacent intermediate pistons 35, around the central rod 34.
- the damping slide 32 comprises a central channel 340 longitudinal (or axial) formed in the central rod 34; said central channel 340 traversing the central rod 34 over its entire length and also passing through the two end pistons 33 so that said central channel 340 has two ends 341 opening in the end pistons 33.
- the central channel 340 is further provided internally two antagonistic jets 342 designed to generate pressure drops in the flow of fluid within said central channel 340; said nozzles 342 are formed substantially inside the end pistons 33.
- the damping slide 32 comprises two radial channels 344 formed in the central rod 34 and placing the central channel 340 in communication with the respective internal lateral chambers 321; said radial channels 344 being disposed between the two nozzles 342 and opening into the respective internal lateral chambers 321 and in the central channel 340.
- the damping slide 32 includes two end channels 343 in said end pistons 33 for fluid communication between the respective working chambers 300 and the central channel 340.
- the end channels 343 are made in the form of grooves formed on the end faces of the respective end pistons 33, corresponding to the end faces of the damping spool partially delimiting the working chambers 300, and placing in fluid communication said working chambers 300 respective and the respective emergent ends 341 of the central channel 34.
- the damping pushers 31 are dimensioned to close off the respective outlet ends 341 of the central channel 34 so that, during the displacement of the damping pushers 31, the fluid circulates between the working chambers 300 and the central channel 34 via the grooves 343 respective, and not directly in the open ends 341 which are plugged.
- the grooves 343 have a generally adapted spiral shape to form a throttle in the flow of fluid between the respective working chambers 300 and the central channel 34, to participate in the desired damping of the displacement of the damping pushers 31.
- the spiral grooves 343 thus have a first end sufficiently far from the axis A3 not to be blocked by the corresponding damping pusher 31, and a second end opening into the respective through end 341 of the central channel 34.
- the fluid passage between the two working chambers 300 includes the grooves 343 and the central channel 345, with four restriction zones in the fluid flow, namely the two nozzles 342 and the two spiral grooves 343.
- the inlet ducts 23 of the gearboxes 2 open into the central internal chamber 320 of the damping spool 32.
- the inlet ducts 23 of the two reducers 2 are made in the form of a single bore passing through the body 1 from side to side in the transverse direction Y.
- the inlet pipes 23 are connected to a source of high pressure fluid.
- an inlet main pipe 290 opens on the one hand into the central internal chamber 320 of the damping slide 32, and on the other hand into the lower face 11 of the body 1 to be connected to a source of low fluid. pressure; said inlet main duct 290 extending parallel to the vertical axis Z.
- the device comprises two connecting lines 291 for putting in communication the compensation chambers 200 of the two reducers 2, namely:
- the connecting pipes 291 are made in the form of bores parallel to the transverse direction Y, passing through the respective compensation chambers 200, and opening into the peripheral face 12 of the body 1, with a plug 292 screwed at the respective open ends of said connecting lines 291.
- the two distal internal chambers 321 of the damping slide 32 are in communication via the radial channels 344 and the central channel 340.
- the compensation chambers 200 of the two reducers 2 are in fluid communication via the two connecting lines 291, the two distal internal chambers 321, the two radial channels 344 and the central channel 340.
- only one of the reducers 2 comprises a return duct 22 opening into the lower face 1 1 of the body 1 to be connected to a source of low pressure fluid.
- the axes A1 and A2 of the reducers 2, the control cavities 20 and the control pistons 21 are horizontal and parallel to the longitudinal direction X.
- the axes A1 and A2 of the gear units 2, the two control cavities 20 and the two control pistons 21 are inclined with respect to the longitudinal direction X symmetrically with respect to the median plane parallel to the plane (Y, Z ).
- the axis A1 is inclined relative to the longitudinal direction X of an angle ⁇ given in degrees
- the axis A2 is inclined relative to the longitudinal direction X of an angle of (180 - ⁇ ) in degrees.
- the angle ⁇ is greater than or equal to 0 degrees (embodiment illustrated in Figures 1 to 8) and strictly less than 90 degrees, preferably between 0 and 45 degrees, or even between 0 and 25 degrees, for questions of vertical footprint.
- a slight inclination of the axes A1 and A2 makes it possible to improve the control of the pedal 44 on the control push-buttons 21.
- the regulating device according to the invention makes it possible to reduce the overall height of said device, in particular by reducing the height of the body 1, and to make cavities internal to the body 1 in a simple manner with bores passing through or not. It also ensures damping in both directions of tilting of the control member 4 by means of a single damping slide 32, the piston type, mounted in a rectilinear damping cavity 30.
- outlet duct 24 described with reference to FIGS. 1 to 8 was made in the form of a vertical bore opening into the lower face 10, but it could have been made in the continuity of the duct. distribution 210, along the longitudinal axis Y, instead of the end which opens into the peripheral face 12 and which is blocked by the screw 211, as is the case in the embodiment illustrated in FIGS. 10.
- the external receiver is connected to the level of the peripheral face 12 of the body 1.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
- Servomotors (AREA)
- Valve Housings (AREA)
- Safety Valves (AREA)
- Mechanically-Actuated Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0806293A FR2938309B1 (fr) | 2008-11-12 | 2008-11-12 | Dispositif de regulation de pression, notamment du type telecommande hydraulique |
| PCT/FR2009/051980 WO2010055240A1 (fr) | 2008-11-12 | 2009-10-16 | Dispositif de regulation de pression, notamment du type telecommande hydraulique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2344773A1 true EP2344773A1 (fr) | 2011-07-20 |
| EP2344773B1 EP2344773B1 (fr) | 2013-03-13 |
Family
ID=40852528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20090760165 Not-in-force EP2344773B1 (fr) | 2008-11-12 | 2009-10-16 | Dispositif de regulation de pression, notamment du type telecommande hydraulique |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8434519B2 (fr) |
| EP (1) | EP2344773B1 (fr) |
| JP (1) | JP5373114B2 (fr) |
| FR (1) | FR2938309B1 (fr) |
| WO (1) | WO2010055240A1 (fr) |
Family Cites Families (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1291415A (fr) * | 1960-07-12 | 1962-04-20 | Daimler Benz Ag | Commutateur hydraulique actionné mécaniquement, en particulier pour dispositifs deréglage sur des voitures automobiles |
| FR2080173A5 (fr) * | 1970-02-25 | 1971-11-12 | Snecma | |
| US3935792A (en) * | 1973-02-26 | 1976-02-03 | Caterpillar Tractor Co. | Pilot pump bleed control for earthmoving scrapers |
| FR2376978A1 (fr) * | 1977-01-06 | 1978-08-04 | Rexroth Sigma | Perfectionnements aux dispositifs distributeurs de fluide, notamment pour telecommande hydraulique |
| FR2507732B1 (fr) * | 1981-06-12 | 1985-08-02 | Rexroth Sigma | Perfectionnements apportes aux plongeurs pour reducteurs de pression de fluide, reducteurs et distributeurs equipes de tels plongeurs |
| EP0218901B1 (fr) * | 1985-09-06 | 1991-03-13 | Hitachi Construction Machinery Co., Ltd. | Système hydraulique de pilotage pour commander une valve de distribution |
| JPH0332869Y2 (fr) * | 1986-12-22 | 1991-07-11 | ||
| JPH01226697A (ja) * | 1988-03-03 | 1989-09-11 | Kobe Steel Ltd | 建設機械における操作レバーの操作反力制御装置 |
| JPH07103942B2 (ja) * | 1988-03-31 | 1995-11-08 | 株式会社小松製作所 | 油圧パイロットバルブ装置 |
| DE68912508T2 (de) * | 1988-10-26 | 1994-05-19 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.), Kobe | Steuervorrichtung für die auf einen Steuerhebel auszuübende Kraft. |
| US5156065A (en) * | 1988-11-11 | 1992-10-20 | Kabushiki Kaisha Kobe Seiko Sho | Control lever apparatus and actuator operation apparatus |
| US5305782A (en) * | 1993-01-22 | 1994-04-26 | Diesel Equipment Limited | Pneumatic control valve system |
| JP3503756B2 (ja) * | 1993-09-28 | 2004-03-08 | 株式会社小松製作所 | 油圧パイロット弁のダンパ装置 |
| JP2786401B2 (ja) * | 1994-11-10 | 1998-08-13 | 川崎重工業株式会社 | 油圧操作弁 |
| US5638866A (en) * | 1996-03-01 | 1997-06-17 | Dana Corporation | Detent arrangement for holding hydraulic valve members stroked |
| JP3337121B2 (ja) * | 1997-05-22 | 2002-10-21 | 川崎重工業株式会社 | パイロット弁 |
| FR2793532B1 (fr) * | 1999-05-12 | 2001-08-03 | Mannesmann Rexroth Sa | Dispositif distributeur de fluide notamment pour telecommande hydraulique |
| DE19961052A1 (de) * | 1999-12-16 | 2001-07-26 | Sauer Danfoss Gmbh | Steuervorrichtung für die manuell- oder fußgeführte Steuerung von Arbeitsmaschinen |
| JP4562902B2 (ja) * | 2000-12-01 | 2010-10-13 | 株式会社小松製作所 | 減圧弁 |
| JP2003097513A (ja) * | 2001-09-25 | 2003-04-03 | Hitachi Constr Mach Co Ltd | 減圧弁型パイロット弁 |
| US6634383B2 (en) * | 2001-12-14 | 2003-10-21 | Caterpillar Inc. | Magnetic detent assist assembly |
| FR2835574B1 (fr) * | 2002-02-04 | 2004-10-29 | Mannesmann Rexroth Sa | Dispositif de regulation de pression pour une telecommande hydraulique |
| FR2854668B1 (fr) * | 2003-05-05 | 2006-07-07 | Rexroth Sa | Distributeur de fluide sous pression a guide double |
| FR2857489B1 (fr) * | 2003-07-11 | 2006-06-09 | Bosch Rexroth Dsi Sas | Telecommande pour engins de travaux publics a poussoir suiveur |
| FR2857706B1 (fr) * | 2003-07-17 | 2007-05-04 | Bosch Rexroth Dsi Sas | Dispositif distributeur de fluide sous pression a double ressorts de regulation |
| JP4583310B2 (ja) * | 2003-09-30 | 2010-11-17 | 株式会社小松製作所 | 操作レバー装置 |
| JP4572526B2 (ja) * | 2003-10-24 | 2010-11-04 | 日産自動車株式会社 | 車輪独立懸架装置 |
| ITPR20050062A1 (it) * | 2005-10-20 | 2006-01-19 | Walvoil Spa | Servocomando idraulico con sistema di smorzamento delle oscillazioni. |
| DE102006042629A1 (de) * | 2006-09-05 | 2008-03-20 | ITT Mfg. Enterprises, Inc., Wilmington | Schaltknüppel |
-
2008
- 2008-11-12 FR FR0806293A patent/FR2938309B1/fr not_active Expired - Fee Related
-
2009
- 2009-10-16 EP EP20090760165 patent/EP2344773B1/fr not_active Not-in-force
- 2009-10-16 JP JP2011543792A patent/JP5373114B2/ja not_active Expired - Fee Related
- 2009-10-16 WO PCT/FR2009/051980 patent/WO2010055240A1/fr not_active Ceased
- 2009-10-16 US US13/129,039 patent/US8434519B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010055240A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010055240A1 (fr) | 2010-05-20 |
| US8434519B2 (en) | 2013-05-07 |
| JP5373114B2 (ja) | 2013-12-18 |
| FR2938309B1 (fr) | 2010-10-29 |
| FR2938309A1 (fr) | 2010-05-14 |
| EP2344773B1 (fr) | 2013-03-13 |
| JP2012508360A (ja) | 2012-04-05 |
| US20110214751A1 (en) | 2011-09-08 |
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