EP2550461A1 - Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydraulique - Google Patents
Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydrauliqueInfo
- Publication number
- EP2550461A1 EP2550461A1 EP11708718A EP11708718A EP2550461A1 EP 2550461 A1 EP2550461 A1 EP 2550461A1 EP 11708718 A EP11708718 A EP 11708718A EP 11708718 A EP11708718 A EP 11708718A EP 2550461 A1 EP2550461 A1 EP 2550461A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switching
- pressure
- piston
- clamping
- switching device
- 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
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
- F15B13/0426—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 fluid-operated pilot valves, i.e. multiple stage valves
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
Definitions
- the invention relates to a device for locking an axially displaceable component of a hydraulic system, wherein the axially displaceable component in at least one axial position via a detent with a detent body releasably releasably fixed, and with a disengagement device for notching the detent body from the axially displaceable Component, wherein the detent means of a tensioning piston and using an energy storage device can be latched and released, and wherein the tensioning piston is movable in a work space acted upon by a clamping pressure.
- DE 39 23 743 A1 discloses a hydraulic directional control valve with a locking device which holds the spool in a working position.
- the locking device has a Ausklink adopted for the spool of the directional control valve, so that at a possible overpressure or even at a corresponding low pressure of the spool can be returned to its neutral center position.
- the locking device has for this purpose an overpressure responsive pressure valve with a piston member and a piston with a spring accumulator, which responds to low pressure. Both the piston and the piston member are operatively connected to a cone, which relieves locking balls located in the locking position, so that the spool can be moved to its neutral center position.
- EP 1 446 599 B1 in turn shows a device for locking an axially displaceable component, such as a control slide of a hydraulic directional control valve, by means of which the axially movable component can be held in axial positions via a detent.
- the detent is releasable by means of a notching device for notching detent bodies from the axially displaceable component.
- the locking positions that allow the detent variably adjustable by changing a position of a Codier stresses. It can thus represent a mechanical coding that allows multiple functional configurations of the directional control valve and thus allows the same various operating conditions.
- a generic hydraulically actuated locking device for a longitudinally movable part relative to a stationary part by means of a radially movable ball is known.
- the ball is arranged in a transverse bore of a stationary, sleeve-shaped part and is able to penetrate into the detent position in a latching groove on the movable part, in unlocked position in a groove on a radially outer sliding sleeve.
- the latching device furthermore has a pressure medium connection from a pressure medium source to a pressure chamber delimited by the movable part, wherein a part of the pressure medium connection is formed in the movable part itself.
- the longitudinally movable member is typically a piston which is mechanically locked after a certain sliding travel by the latching means. In this position, the sliding sleeve abuts with its end face at the pipe end and the compression spring is fully pretensioned. If the piston is to be extended, pressure medium is introduced into the pressure chamber via a bore under a correspondingly high pressure. About this pressure medium, a pressure builds up, which shifts the sliding sleeve against the force of the compression spring, so that the annular groove can reach into the region of the ball and the piston is unlocked again.
- a disadvantage of the device could be considered that always takes place on reaching a certain working pressure, the unlatching of the spool.
- a permanent detenting or a deactivated detenting and an operation performed with such a configuration of the component or a directional control valve is not possible.
- the present invention seeks to provide a device for locking an axially displaceable component of a hydraulic system, in particular for locking a spool, which does not have the disadvantages mentioned.
- This object is achieved with a device for locking an axially displaceable component with the features of claim 1 in its entirety.
- a particularly advantageous feature of the device characterizing the invention is that the tensioning piston can be adjusted by a switching device at least into a switching position.
- the switching device ensures on the one hand that the clamping pressure is guided to the clamping piston and can be removed by the energy storage from its latching position in case of drop of the clamping pressure in this first, called “kick-out switching position" switching position of the clamping piston
- Others can be realized with the switching device at least two further switching positions preferably, wherein a further second switching position is used to pressure medium from the clamping piston in a
- a third switching position of the switching device preferably provides for a blocking of the tensioning piston in the respective assumed switching position, in particular in the latching position.
- the component may be a spool of a hydraulic directional control valve.
- the switching device is acted upon as a clamping pressure of a load pressure of a consumer, which is preferably controlled by the directional control valve. This results in that no latching function is possible in a working position of a hydraulic working tool when a pressure medium pump is connected. With a restart of the pressure medium pump is thus reliably prevented that the spool of the directional control valve is in a position in which a working connection is directly connected to the pressure medium-promoting pressure medium pump and thus a dangerous, unintentional actuation of a consumer is possible (safety function).
- a so-called "kick-ouf'-function of the switching device should cancel the locking action on reaching a predetermined load height at the working port of the directional control valve and push out the valve slide from the detent position with the help of the force accumulator (kick-out).
- the switching device can preferably be operated manually, and preferably three switching positions or operating modes for the ration can be realized. Since the switching device controls the pressurization of the clamping piston for the detent can be effected with a second switching position of a valve member of the switching device permanent relief of the clamping piston by the working space is connected to a pressure fluid container for emptying the working space and a connection of the working space of the clamping piston with a load pressure of a consumer is omitted. This results in a permanent decommissioning of the detent.
- a blocking of the supply and removal of pressure medium to or from the working space of the tensioning piston can be effected.
- the choice of the various switching positions can be done via a rotary switch or switch button, all three switching positions of the valve member of the switching device at half a turn of the switch knob or less are approached.
- the valve member of the switching device can perform a combined rotational and translational movement, as this is very space-saving about with a control piston feasible.
- the "kick-ouf" function is realized, in which the clamping piston for the detent is subjected to a clamping pressure. Left and right of this neutral position can be provided the two other switching positions.
- the latter is integrated in a housing of the directional control valve and a longitudinal axis of the control piston is arranged parallel to a longitudinal axis of the valve member of the directional control valve.
- the inventive device is particularly suitable for an arrangement in hydraulic systems of commercial vehicles, such as so-called. Tractors.
- FIG. 1 a schematic, not to scale longitudinal section through the device for locking the axially displaceable component in a basic position; a schematic, not to scale longitudinal section through the device for locking the axially displaceable component in a permanent locked position (switching position DR / rotation angle -90 °); 4 is a schematic, not to scale longitudinal section through the device for locking the axially displaceable construction partly in a "kick-out" operating position (switching position KO / angle of rotation 0 °); a schematic, not to scale longitudinal section through the device for locking the axially displaceable component in a disengagement division of a switching device (without detent / oR rotation angle + 90 °); and a schematic, perspective view of the device for locking the axially displaceable component on a directional control valve according to the illustration according to FIG.
- FIG. 1 shows in a schematic circuit diagram a device 1 on a directional control valve 3 for locking a valve member 18 of the directional control valve 3.
- the valve member 18 is formed as a valve spool and as an axially displaceable component 2 in a conventional manner.
- the pertinent Wegeventi l 3 has a pressure supply port P for providing a working and pump pressure, a return port R, a section load sensing port LS, two Steueran- conclusions ⁇ and P'B and two Useful connections E, F on.
- the said fluid connections LS, ⁇ , P'B, R, E, F are arranged in a part of a housing 14 of the directional control valve 3. Seen in the direction of FIGS.
- a lower section of the housing 14 has an annular channel arrangement 19, into which a pressure compensator 1 1 can be inserted, which is connected upstream of the directional control valve 3 and this with the function of a quantity cut-off by the LS.
- Pressure limit provides. This can be at a drive a designed as a hydraulic cylinder load 10, which is shown only schematically and should be located at an end stop, to cut off the overload of the pressure medium pump, the flow rate of pressure medium to the hydraulic cylinder.
- FIG. 1 illustrates in a simplified manner, the device 1 for locking the valve member 18 to the housing 14 of the directional control valve 3 is attached to lock the valve member 18.
- the device 1 consists of a, as shown in FIG. 2 ', detent 4 with a locking piston 20 movable in the same axial direction as the valve member 18, in the extension of which an element 21 is arranged in the manner of a cone bushing, the control or inclined surfaces 22 has.
- the device 1 is arranged in a single housing 29, wherein the housing 29 has a rectangular, formed with rounded corners, massive flange plate 30, with it at a flat end face of the housing 14 of the directional control valve 3 from the left side - can be screwed.
- Fig. 7 illustrates in a perspective view that the housing 29 is formed in the manner of a cup having a substantially conically widening to the housing 14 shape, wherein in the housing 29, a cylindrical bore 31 is introduced.
- the bore 31 has an approximately twice as large diameter D as the diameter of the locking piston 20, which protrudes through the bore 31 substantially in its entire length.
- the locking piston 20 is formed as a cylindrical rotary member integral with the valve member 18 of the directional control valve 3 and has a fürmesserver-monyung of about V * of the diameter of the valve member 18 in the axial region of the flange plate 30, wherein the diameter in the axial region of the housing 29 with the exception of two locking recesses 24,25 forming indentations 32 is designed to be consistent.
- the grooves 32 have a part-circular cross-section.
- the locking piston 20 is mounted at its free end 33 in a guide bushing 34 and lies with its slightly less than half its length reaching collar on the wall formed by the bore 31.
- the locking piston 20 can penetrate the guide bushing 34 by its free end 33 can engage in a blind hole at the top of the housing 29 depending on its displacement position.
- the unions 32 are located in the position shown in FIGS. 3 and 4 of the locking piston 20 in the region of the respective end faces 36, 36 'of the guide bush 34.
- latching body 5 can occur in the form of balls.
- control surfaces or inclined surfaces 22 for the stop on the housing side are located on a stop arranged sleeve 35, wherein the inclined surfaces 22 extend approximately 45 ° to a longitudinal axis 1 7 of the valve member 18 to the guide bush 34, so that the locking body 5 or balls are held in contact with the inclined surfaces 22 on an end face 36 of the guide bush 34.
- the stop sleeve 35 is acted upon by a cylindrical compression spring 37, which is guided at a radial distance on the locking piston 20, and is supported on the stop sleeve 35 at an end formed by an extension of the inner diameter of the stop sleeve 35 face 38 axially.
- the compression spring 37 is guided on an inner circumferential surface 39 of the stop sleeve 35.
- the attachment sleeve 35 has an inner contour in the manner of a piston.
- the compression spring 37 is held in contact with a tensioning piston 7.
- the clamping piston 7 is arranged axially displaceably in a blind bore 40, which is guided by a stop surface 41 for the flange plate 30.
- the blind bore 40 has a slightly larger diameter Ds, so that the clamping piston 7 guided therein can reach the flange plate 30 with its end face 42 facing the bore 31.
- the compression spring 37 is located in a recess 43 in the clamping piston 7 and is radially guided in this respect.
- a cylindrical helical compression spring 44 which is a force accumulator 8, arranged, and applies a compressive force on one of the inclined or control surfaces 22 radially outwardly adjacent end face 45 of the stop sleeve 35 , The pressure force is so far directed against the pressure force of the compression spring 37.
- a working space 27 between a bottom of the blind bore 40 and the back of the clamping piston 7 is acted upon by a clamping pressure p, which in all embodiments shown in FIGS. 1 to 7 a
- Load pressure P 'of the pressure compensator 1 1 is.
- the load pressure p ' is via an in the channel 14 of the directional control valve 3 guided channel 46 is tapped, wherein the channel 46 has only the dimension of a control pressure line.
- the channel 46 adjoins an end face 47 of a valve member 12 formed as a control piston 1 5 a switching device 9.
- the control piston 15 is aligned with its longitudinal axis 16 parallel to the longitudinal axis 1 7 of the valve member 18 and has, on the one hand, as shown in Figure 3 in a longitudinal section, a through hole 48 which is axially guided by the control piston 15.
- the through hole 48 is guided off-center.
- control piston 15 of the through hole 48 opposite a key-like milled recess 49 is disposed on the outer periphery of the control piston 15.
- the control piston 15 is with its end face 47 into abutment with a blunt needle tip 50 of a bearing needle 51 which is inserted in the housing 14 of the directional control valve 3 in the direction of the longitudinal axis 16 of the control piston 15.
- the control piston 15 is slidably guided substantially in a blind bore 52 which is parallel to the blind bore 40 for the clamping piston 7.
- the blind bore 52 is guided by the same stop surface 41 of the housing 14 of the directional control valve 3 as the blind bore 40 itself.
- the diameter of the valve member 12 is reduced, wherein a cylindrical compression spring 28 is pushed, which is supported at its end remote from the control piston 15 on a shaft 53 of a switch knob 13.
- the shaft 53 is guided in the housing 29 and has at its end facing the compression spring 28 the same outer diameter as the switching piston 15.
- the diameter of the shaft 53 tapers in a first diameter recess 54 within the housing 29 toward the switching knob 13 and again when exiting the housing 29.
- the shaft 53 extends through the switching knob 13 and is in this with a splined connection 55 (groove). Spring) partially guided.
- the switch knob 13 is also fixed with a cap nut 56 fixed on a thread of the shaft 53.
- the switching knob 13 is, as shown in particular in Figure 7, designed as a double-wing knob, which is manually operated.
- a spring chamber 57 for the compression spring 37 and a spring chamber 58 for the compression spring 28 are connected to a pressure medium tank T in the form of a tank connection (see Fig. 7).
- a channel 59 extends in the direction of the FIGS. 2 'to 5 in the housing 14 of the directional control valve 3 in a direction parallel to the longitudinal axes 16, 7 and above the valve member 18.
- the channel 59 is diagonal, the flange plate 30 and a subsequent housing portion of the housing 29 arranged transversely through and terminates in the spring chamber 57. As FIG. 7 shows, this channel 59 opens at its other end on a flat-milled side surface 60 of the valve housing 29.
- the switching knob 13 assumes a switching position A as the basic position, taking into account a so-called "kick-out” function (KO), in which case the clamping pressure guided on the end face 47 of the control piston 15 p is the load pressure p ', which is tapped by the pressure balance 1 1 and via the milled recess 49 and a branch channel, not shown in the control piston 15 via a transverse channel 61 in the Ge housing 14 of the directional control valve 3 is connected to the clamping piston working chamber 27.
- K so-called "kick-out” function
- the clamping piston 7 With appropriate pressurization of the working chamber 27, the clamping piston 7 can assume a position as shown in Figure 4 and in connection with a corresponding operational switching position of the valve member 18 at a pressurization of a hydraulic load 10, it can be latched by incidence of the locking body 5 in a the two locking recesses 24 and 25 come. As a result, the locking piston 20 and the integrally formed therewith valve member 18 are releasably secured to the stop sleeve 35.
- the detent body 5 formed as balls abut against the inclined or control surfaces 22 of the stop sleeve 35, which in turn is pressed by the tensioning piston 7 caused by the increased spring bias of the compression spring 37 against the guide bushing 34.
- the locking piston 20 If in an operation interruption or shutdown of the hydraulic system, the LS pressure and thus the pressure p 'in the working chamber 27 of the clamping piston 7 is lowered or brought to zero, the locking piston 20 at reduced spring force of the compression spring 37 and in the direction of 2 and 5 shown positions of the receding clamping piston 7 caused by the power storage 8, the helical compression spring 44 and by the valve spring, not shown (other valve spool end) in one, the locking body 5 released from the respective detent recess 24,25 and throwing out position be (kick-out).
- the housing 29 can be unscrewed in a simple manner from the housing 14 of the directional control valve 3 (not shown).
- a flat gasket 62 can serve as the simplest sealing element for sealing said fluid-carrying connections and spring chambers between the two housings 14 and 29.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
- Actuator (AREA)
- Mechanical Control Devices (AREA)
Abstract
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11708718T PL2550461T3 (pl) | 2010-03-20 | 2011-03-05 | Urządzenie do ryglowania przesuwnego osiowo elementu konstrukcyjnego instalacji hydraulicznej |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010012158A DE102010012158A1 (de) | 2010-03-20 | 2010-03-20 | Vorrichtung zum Verriegeln eines axial verschiebbaren Bauteils einer hydraulischen Anlage |
PCT/EP2011/001092 WO2011116877A1 (fr) | 2010-03-20 | 2011-03-05 | Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydraulique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2550461A1 true EP2550461A1 (fr) | 2013-01-30 |
EP2550461B1 EP2550461B1 (fr) | 2015-01-07 |
Family
ID=44169130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11708718.9A Not-in-force EP2550461B1 (fr) | 2010-03-20 | 2011-03-05 | Dispositif de verrouillage d'un composant déplaçable axialement d'une installation hydraulique |
Country Status (6)
Country | Link |
---|---|
US (1) | US20120304850A1 (fr) |
EP (1) | EP2550461B1 (fr) |
JP (1) | JP2013522739A (fr) |
DE (1) | DE102010012158A1 (fr) |
PL (1) | PL2550461T3 (fr) |
WO (1) | WO2011116877A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106809008B (zh) * | 2017-02-15 | 2018-12-21 | 苏州萨伯工业设计有限公司 | 机液混合四挡传动方法 |
DE102018212114A1 (de) * | 2018-07-20 | 2020-01-23 | Robert Bosch Gmbh | Wegeventil mit Rastung, Kick-Out und Neutralstartsicherung |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2393962A (en) * | 1943-03-09 | 1946-02-05 | Electrical Inc | Fluid actuated lock cylinder |
US2768610A (en) * | 1953-11-12 | 1956-10-30 | Mead Specialties Company Inc | Control mechanism for pressure fluid apparatus |
US3161400A (en) * | 1963-05-14 | 1964-12-15 | Audco Ltd | Fluid control valve |
US3402642A (en) * | 1965-10-23 | 1968-09-24 | Huck Mfg Co | Reciprocating valve and piston |
US3790125A (en) * | 1972-10-31 | 1974-02-05 | Fluid Controls Inc | Control valve with power accumulating, snap action, spool drive |
US3941141A (en) * | 1974-05-03 | 1976-03-02 | Robert Eddie L | Blowout preventer locking apparatus and method |
US3972398A (en) * | 1975-04-17 | 1976-08-03 | Caterpillar Tractor Co. | Parking brake and transmission valve interlock |
US4083382A (en) * | 1976-06-03 | 1978-04-11 | J. I. Case Company | Regulating valve with hydraulic detent |
US4309022A (en) * | 1980-04-14 | 1982-01-05 | Consolidated Controls Corporation | Poppet valve actuator apparatus |
US4716933A (en) * | 1986-10-16 | 1988-01-05 | J. I. Case Company | Valve unit |
DE3923743A1 (de) | 1989-07-18 | 1991-01-24 | Bosch Gmbh Robert | Hydraulisches wegeventil mit verriegelungseinrichtung |
DE4107980A1 (de) * | 1991-03-13 | 1992-09-17 | Bosch Gmbh Robert | Hydraulisch betaetigte rasteinrichtung |
DE10157030A1 (de) | 2001-11-21 | 2003-05-28 | Bosch Gmbh Robert | Vorrichtung zum Verriegeln eines längsbeweglich geführten Bauteiles |
DE102008022509A1 (de) * | 2008-05-07 | 2009-11-12 | Robert Bosch Gmbh | Wegeventil mit einer Rastvorrichtung |
-
2010
- 2010-03-20 DE DE102010012158A patent/DE102010012158A1/de not_active Withdrawn
-
2011
- 2011-03-05 WO PCT/EP2011/001092 patent/WO2011116877A1/fr active Application Filing
- 2011-03-05 US US13/261,386 patent/US20120304850A1/en not_active Abandoned
- 2011-03-05 JP JP2012557434A patent/JP2013522739A/ja active Pending
- 2011-03-05 EP EP11708718.9A patent/EP2550461B1/fr not_active Not-in-force
- 2011-03-05 PL PL11708718T patent/PL2550461T3/pl unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2011116877A1 * |
Also Published As
Publication number | Publication date |
---|---|
PL2550461T3 (pl) | 2015-05-29 |
WO2011116877A1 (fr) | 2011-09-29 |
EP2550461B1 (fr) | 2015-01-07 |
JP2013522739A (ja) | 2013-06-13 |
DE102010012158A1 (de) | 2011-09-22 |
US20120304850A1 (en) | 2012-12-06 |
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