EP3094515A1 - Vorrichtung zum sperren und zum druckanpassen - Google Patents
Vorrichtung zum sperren und zum druckanpassenInfo
- Publication number
- EP3094515A1 EP3094515A1 EP14806536.0A EP14806536A EP3094515A1 EP 3094515 A1 EP3094515 A1 EP 3094515A1 EP 14806536 A EP14806536 A EP 14806536A EP 3094515 A1 EP3094515 A1 EP 3094515A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- working
- valve
- control
- logic element
- 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.)
- Withdrawn
Links
- 230000000903 blocking effect Effects 0.000 title abstract description 20
- 239000012530 fluid Substances 0.000 claims description 57
- 230000015654 memory Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/005—Suspension locking arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/056—Regulating distributors or valves for hydropneumatic systems
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
- E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
- E02F9/2207—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing or compensating oscillations
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/021—Installations or systems with accumulators used for damping
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/003—Systems with load-holding 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/154—Fluid spring with an accumulator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/46—Means for locking the suspension
- B60G2204/4605—Means for locking the suspension hydraulically, e.g. interrupting communication between the chambers of a hydraulic cylinder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2300/00—Indexing codes relating to the type of vehicle
- B60G2300/09—Construction vehicles, e.g. graders, excavators
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/34—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with bucket-arms, i.e. a pair of arms, e.g. manufacturing processes, form, geometry, material of bucket-arms directly pivoted on the frames of tractors or self-propelled machines
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—Accumulators
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/85—Control during special operating conditions
Definitions
- the invention relates to a device for locking and for pressure adjustment for a hydraulically controllable actuator device, in particular in the form of a hoist of a working machine, of the at least one working space by means of a valve device selectively to a Druckversor- supply device comprising a storage device, or to a discharge side, in particular a tank side, can be connected.
- Such devices are used in construction machines, especially in wheel loaders. These machines include, inter alia, an actuator for a hoist with at least one piston-cylinder unit for raising and lowering a bucket of this hoist.
- this loading shovel is exposed to different static and dynamic loads which have to be controlled by the actuator device.
- the piston-cylinder unit which then functions as a lifting cylinder is generally locked in order to be able to use the full force of the working machine to pick up the payload.
- the actuator should take the function of a spring-damper unit, to prevent the floating suspended in a constant position payload unintentionally swings up.
- this working space of the actuator device is connected to the storage device at a higher working pressure than the accumulator pressure.
- the valve device has a first logic element that compares the working pressure with the accumulator pressure for driving a control line of a second logic element of the valve device, which controls a possible fluid connection between the one working chamber and the storage device. In this way, the higher pressure of working pressure and accumulator pressure is applied to the second logic element in the reverse direction.
- the second logic element closes particularly reliable and is kept closed even with particularly high loads of the actuator, for example, when retracting by means of the bucket of the hoist in a male payload with a wheel loader of the machine.
- a first control valve of the valve device is advantageously connected in the control line, which produces a fluid-conducting connection to the discharge side in a first control position, in the so-called spring-damper mode and in a second control position, in the so-called lock mode, the control line to the working pressure of the one Working space of the actuator device connects.
- the control line is relieved of pressure, so that the second logic element is opened after the pressure reduction and a working space is connected to the storage device.
- In the locking position is in the closing direction of the second logic element at least the working pressure, which ensures in conjunction with an energy storage for a secure blocking of the fluid connection via the second logic element.
- the actuator is formed from at least one hydraulic working cylinder whose piston side delimits one working space and whose rod side delimits another working space.
- Alternative concepts use hydromotors at least partially instead of hydraulic working cylinders.
- a third logic element of the valve device may be present, which is connected to the control line and which controls a fluid connection between the rod side and the discharge side. By the third logic element and the rod side is secured against leakage of fluid in the blocking mode of the device. In the spring-damper mode, fluid can be brought out of the further working space via the third logic element and, with a corresponding design of the discharge side, also be sucked into it.
- a shutter or a flow control valve connected in the control line between the second logic element and the control valve.
- the orifice or the flow control valve causes the fluid pressure upstream of the orifice or the flow control valve to be maintained at a high level until the accumulator has deflated so far that the accumulator pressure has dropped to the level of the working pressure. In this way, the second logic element - and possibly also the third logic element - held longer locked.
- the storage device for a pressure supply of the same by means of a second control valve of the valve device, which is controlled by the pressure in the control line, connectable to the Druckmakerssein- direction.
- This circuit allows charging of the memory device in lock-up mode and thus a significant increase in memory pressure.
- the memory pressure can then be used extremely advantageous for blocking the second logic element and possibly also the third logic element. This allows a blocking of the actuator even at maximum load.
- an additional supply device for additional supply of the actuator and other components of a working hydraulics, in particular for driving the hoist of the working machine.
- This supply device can in particular Have directional control valves to selectively feed working fluid into one of the working spaces of the actuator or to discharge from this.
- the supply device thus enables the control of the actuator device or of any further components of the working hydraulics.
- the logic elements are formed from 2/2-way valves. The logic elements are characterized in that the fluid pressures applied to the fluid connections act in the opening direction of the valve and acts on the opposite control side of the fluid pressure from the control line, optionally reinforced by an energy storage in the closing direction.
- the first control valve may be an electrically controllable 3/2-way valve and the second control valve may be a 2/2 way valve of a different type than the logic elements.
- the 3/2-way valve makes it possible to connect the control line in a simple manner to the one working chamber of the actuator device or to the discharge side with full opening cross-section.
- the 3/2-way valve is designed so that it can withstand any occurring working pressure of the actuator.
- the storage device can advantageously be reloaded by a hydraulic pump (constant or control pump) of the pressure supply device with fluid presettable pressure.
- Fig. 1 at least partially in the manner of a hydraulic block diagram, the application of a device according to the invention for locking and for pressure adjustment in a Hubtechnikaktua- gate device of a blade wheel loader; 2 is an enlarged view of the valve device of the device according to FIG. 1.
- a device 10 for locking and for pressure adjustment for a hydraulically controllable actuator 12 in the form of a working cylinder 14 or generally a piston-cylinder unit of a hoist 16 a working machine 18, in the form of a blade wheel loader shown.
- the actuator device could be designed as a hydraulic motor (not shown).
- the piston-cylinder unit 14 has a first working chamber 20 on a piston side 19 and a second working chamber 22 on a rod side 21.
- a supply device 28 is provided for a further, unspecified work hydraulics 30.
- independently hydraulic fluid can be alternately brought into each of the working spaces 20, 22 and released from this again to move the components of the wheel loader 18 during operation, for example, to lift the bucket 26 or for dumping a payload 32 from the loading shovel 26.
- the device 10 for locking and for pressure adjustment is connected to the actuator device 12.
- This device 10 produces a fluid connection from the first working space 20 to a storage device 34 in a spring / damper mode or interrupts it in the blocking mode.
- the second working space 22 of the actuator 12 can be connected to the discharge side 66, in particular a tank side, or in a blocking mode, this fluid connection can be blocked.
- the device 10 has a valve device 38 shown enlarged in FIG. 2 with terminals 40, 46 for the working spaces 20 and 22, respectively.
- the first working chamber 20 of the actuator device 12 is connected to a first fluid port 40 of the valve device 38.
- the respectively prevailing at the first fluid port 40 fluid pressure is referred to as the working pressure.
- the first fluid port 40 is further connectable via a second logic element 42 in the form of a 2/2-way valve to a storage port 44, to which the storage device 34 is connected.
- the respectively prevailing at the storage port 44 fluid pressure is referred to as storage pressure.
- the storage device 34 comprises three hydraulic accumulator of conventional design, such as piston accumulator.
- the second working chamber 22 of the actuator device 12 is connected to a second fluid connection 46 of the valve device 38.
- This second fluid connection 46 can be connected via a third logic element 48 in the form of a 2/2-way valve to an outlet connection 50 leading to the discharge side (tank) 66.
- a first control valve 52 is connected to the first fluid connection 40.
- the first control valve 52 is preferably designed as a 3/2-way valve.
- a control line 60 is connected to the first fluid port 40.
- an electrical actuating device (solenoid coil) 62 the first control valve 52 is switchable into a second control position counter to the action of a return spring 63, in which the control line 60 is connected to a further control unit.
- Lassan gleich 64 is connected, in turn, the tank or discharge side 66 is connected.
- control sides 68, 70 of the second logic element 42 and the third logic element 48 are permanently connected to the first control valve 52 in its switching position shown in the figures. Accordingly, these control sides 68, 70 can be acted upon in the blocking mode with the fluid pressure at the first fluid port 40. Since this fluid pressure is present in the second logic element 42 both in the opening direction and in the blocking direction and a valve piston 72 of the second logic element 42 is additionally acted upon by an energy store (compression spring) 74 in the closing direction, the second logic element 42 is securely closed in its blocking position. Similarly, the third logic element 48 in the closing direction of the fluid pressure at the first fluid port 40 in the reverse direction and a much lower fluid pressure at the second fluid port 46 in the opening direction acted upon.
- the third logic element 48 is safely locked.
- the fluid can flow out of the control line 60 to the discharge side 66 via the then switched valve 52 (left-hand switching representation) and the outlet connection 64 toward the tank.
- the corresponding control sides 68, 70 of the second logic element 42 and of the third logic element 48 are relieved, so that these logic elements 42, 48 can move into the open position (not shown).
- a first logic element 76 is provided in addition to the first check valve 56 in the connecting line 54 from the first fluid port 40 and the first control valve 52 in parallel.
- the first logic element 76 has a fluid inlet 78, which is connected to the storage port 44.
- a fluid outlet 80 of the first logic element 76 is connected to the control line 60.
- the fluid pressures at the fluid inlet 78 and at the fluid outlet 80 of the first logic element 76 act on a valve piston 82 of this valve in the opening direction.
- On the opposite control side 84 of the fluid iddruck act on the first fluid port 40 and an energy storage (compression spring) 86 in the reverse direction on the valve piston 82 of the first logic element 76 a.
- a shutter 88 or a flow control valve (not shown) is connected.
- the pressure at the first fluid connection 40 ie the working pressure in the working chamber 20 of the actuator device 12
- the pressure prevailing at the reservoir connection 44 ie the accumulator pressure. If the accumulator pressure is higher than the working pressure, the first logic element 76 opens and fluid from the accumulator 34 flows into the control line 60.
- the first check valve 56 prevents in the blocking mode, wherein the first control valve 52 is held de-energized in the switching position shown, thereby connecting the control line 60 to the first fluid port 40 that fluid in this way from the memory device 34 to the first fluid port 40 and on to the actuator 12 can flow.
- the second logic element 42 and the third logic element 48 instead of the lower working pressure, the higher storage pressure is now present.
- the second logic element 42 and the third logic element 48 are therefore tightly closed and remain at higher loads and any pressure surges on the part of the actuator 12 in the closed position shown.
- the orifice 88 or the flow control valve in the control line 60 prevents the built-up Pressure on the control sides 68, 70 of the second logic element 42 and the third logic element 48 may drop as long as fluid flows from the memory device 34 via the first logic element 76 with higher pressure. Consequently, in the spring-damper mode, the fluid connections via the second logic element 42 and the third logic element 48 are kept locked until the storage device 34 has emptied so far that the accumulator pressure has approached the working pressure in the working space 20. When this pressure is reached, the first logic element 76 is then closed by its energy store 86.
- a pressure regulating or limiting valve 98 as pressure closing valve, a second control valve 100 and a second, preferably spring-loaded check valve 102 is provided. Said valve 98 ensures that the storage device 34 can only be recharged up to a predefinable maximum storage pressure.
- the second control valve 100 is, as shown, formed as a 2/2-way valve of a different type than the logic valves and is driven by the control line 60 with.
- the second control valve 100 When the control line 60 is depressurized in the spring-damper mode, the second control valve 100 is locked due to the action of a return spring as shown, and the connection line 96 between the pressure supply port 90 and the storage port 44 is interrupted, so that in this mode Recharge the memory device 34 takes place.
- the lock mode at least the working pressure, which may be higher than the accumulator pressure, is present in the control line 60, so that the second control valve 100 opens the connection line 96 in this mode and allows the accumulator 34 to be reloaded to a higher pressure level.
- the second check valve 102 opens in the direction of the storage port 34 and thus prevents a possible, unwanted reflux of hydraulic fluid in the direction of the pressure supply port 90.
- the second logic element 42 can be the piston side in the form of the first working space 20 of the lifting or working cylinder 14 with the individual Hyd- ro townn the memory device 34 and the third logic element 48, the ring side in the form of the second working space 22 of the working cylinder 14 with the tank, respectively the discharge side 66 connect.
- the individual logic elements are controlled. If the 3/2-way or way switching valve in its in the figures shown, energized default position, the pressure in the first working chamber 20 via the check valve 56 and again via the 3/2-way valve 52 with the control surfaces 68 and 70 of the two logic elements 42 and 48 fluidly connected.
- the said logic elements then block the connections to the accumulators of the storage device 34 or to the discharge side 66 without leakage oil.
- the 2/2-way valve is switched to the open position (not shown) via this control pressure in the control line 60.
- the memories of the memory device 34 are then from the working hydraulic (pressure supply means 94) via said 2/2-way valve 100 and the second check valve
- the first logic element 76 compares the accumulator pressure of the accumulator 34 with the cylinder or working pressure prevailing in the first working space 20 of the working cylinder 14. If the accumulator pressure is above the cylinder or working pressure, then the first logic element 76 moves to an open position and to this extent directs the accumulator pressure to the control surfaces 68 and 70 of the second logic element 42 and the third logic element 48.
- the aforementioned control surfaces 68, 70 are always included the highest pressure from the first working space 20 or the storage device 34 connected.
- the first check valve 56 prevents a connection between the memory device 34 to the first working space 20 via the control line 60.
- the second and third logic elements 42 and 48 are so far securely closed (lock mode).
- the 3/2-way valve is then electrically switched via the actuator 62, with the result that the control line 60 is relieved to the tank or discharge side 66 out. Due to the discharge of the control line 60 is then under the action of the return spring
- the first logic element 76 is in the open position.
- the pressure of the memory device 34 is then drained controlled via the aperture 88.
- the dynamic pressure in front of the diaphragm 88 keeps the second and third logic elements 42 and 48 in the closed position during the discharge of the accumulator.
- the first logic element 76 closes and the control surfaces 68, 70 of the two logic elements 42 and 48 are relieved to tank side pressure to the discharge side 66 and open the connection of the lifting or working cylinder 14 to the Saving the storage device 34 and the tank or the discharge side 66.
- the lifting or working cylinder 14 is then connected to its working space 20 with the memories of the storage device 34 and the other working space 22 via the drain port 50 with the tank.
- the inventive device 10 for locking and for pressure adjustment has the advantage that when switching the device 10 in a spring-damper mode, the accumulator pressure is first reduced to the pressure level of the first working chamber 20, which is to be connected to the memory device 34, and that the fluid connection between the working space 20 and the storage device 34 is produced only when this pressure level is reached.
- the pressure level in the storage device 34 in the blocking mode can advantageously be substantially higher and be used for the hydraulic blocking of the actuator device 12.
- the storage pressure in the storage device 34 can be further increased by recharging to a predefinable maximum storage pressure. In that regard, there is a jerk and inhibition-free operation with the device.
- a device 10 is shown in this way, which withstands the highest loads in the blocking mode on the part of the actuator 12 and the loading bucket 26 loading them and with the same storage device 34 at a same, but also substantially lower pressure level in a spring-damper mode Suspension and damping of the hoist 16 and thus the loading shovel 26 provides for safe operation of the working machine.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014000696.4A DE102014000696A1 (de) | 2014-01-14 | 2014-01-14 | Vorrichtung zum Sperren und zum Druckanpassen |
PCT/EP2014/003095 WO2015106777A1 (de) | 2014-01-14 | 2014-11-20 | Vorrichtung zum sperren und zum druckanpassen |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3094515A1 true EP3094515A1 (de) | 2016-11-23 |
Family
ID=52006962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14806536.0A Withdrawn EP3094515A1 (de) | 2014-01-14 | 2014-11-20 | Vorrichtung zum sperren und zum druckanpassen |
Country Status (5)
Country | Link |
---|---|
US (1) | US10145086B2 (de) |
EP (1) | EP3094515A1 (de) |
CN (1) | CN105899384A (de) |
DE (1) | DE102014000696A1 (de) |
WO (1) | WO2015106777A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017004303A1 (de) * | 2017-05-04 | 2018-11-08 | Hydac Systems & Services Gmbh | Druckspeichersystem |
DE102021004612A1 (de) | 2021-09-11 | 2023-03-16 | Hydac Mobilhydraulik Gmbh | Betätigungsvorrichtung für zumindest einen fluidisch antreibbaren Verbraucher |
DE102021004608A1 (de) | 2021-09-11 | 2023-03-16 | Hydac Mobilhydraulik Gmbh | Betätigungsvorrichtung für zumindest einen fluidisch antreibbaren Verbraucher |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6279316B1 (en) * | 1997-09-30 | 2001-08-28 | Volvo Wheel Loaders Ab | Load suspension system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19754828C2 (de) * | 1997-12-10 | 1999-10-07 | Mannesmann Rexroth Ag | Hydraulische Steueranordnung für eine mobile Arbeitsmaschine, insbesondere für einen Radlader, zur Dämpfung von Nickschwingungen |
US6167701B1 (en) * | 1998-07-06 | 2001-01-02 | Caterpillar Inc. | Variable rate ride control |
US6357230B1 (en) * | 1999-12-16 | 2002-03-19 | Caterpillar Inc. | Hydraulic ride control system |
DE10063101C2 (de) * | 2000-12-18 | 2003-04-17 | Log Hydraulik Gmbh | Hydraulikanordnung für Fahrzeuge |
DE10148962C1 (de) * | 2001-10-04 | 2003-02-27 | Hydac Technology Gmbh | Steuervorrichtung |
US7044482B2 (en) * | 2003-09-19 | 2006-05-16 | Cnh America Llc | Locking anti-motion suspension |
DE102004010053A1 (de) | 2004-03-02 | 2005-09-29 | Hydac System Gmbh | Federungsvorrichtung |
DE102004033890A1 (de) * | 2004-07-13 | 2006-02-16 | Bosch Rexroth Aktiengesellschaft | Hydraulische Steueranordnung |
DE102008057723A1 (de) | 2008-11-07 | 2010-05-12 | Hydac System Gmbh | Vorrichtung zum Ausgleich hydraulischer Wirkdrücke |
-
2014
- 2014-01-14 DE DE102014000696.4A patent/DE102014000696A1/de not_active Withdrawn
- 2014-11-20 US US15/104,256 patent/US10145086B2/en not_active Expired - Fee Related
- 2014-11-20 EP EP14806536.0A patent/EP3094515A1/de not_active Withdrawn
- 2014-11-20 CN CN201480073013.XA patent/CN105899384A/zh active Pending
- 2014-11-20 WO PCT/EP2014/003095 patent/WO2015106777A1/de active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US6279316B1 (en) * | 1997-09-30 | 2001-08-28 | Volvo Wheel Loaders Ab | Load suspension system |
Non-Patent Citations (1)
Title |
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See also references of WO2015106777A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2015106777A1 (de) | 2015-07-23 |
DE102014000696A1 (de) | 2015-07-16 |
US20160312806A1 (en) | 2016-10-27 |
CN105899384A (zh) | 2016-08-24 |
US10145086B2 (en) | 2018-12-04 |
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