EP2725236A2 - Unité télescopique avec fonction supplémentaire - Google Patents

Unité télescopique avec fonction supplémentaire Download PDF

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Publication number
EP2725236A2
EP2725236A2 EP13075064.9A EP13075064A EP2725236A2 EP 2725236 A2 EP2725236 A2 EP 2725236A2 EP 13075064 A EP13075064 A EP 13075064A EP 2725236 A2 EP2725236 A2 EP 2725236A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic
telescopic
unit according
cylinder
piston rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13075064.9A
Other languages
German (de)
English (en)
Other versions
EP2725236A3 (fr
EP2725236B1 (fr
Inventor
Rolf Heintz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terex Global GmbH
Original Assignee
Terex Cranes Germany GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terex Cranes Germany GmbH filed Critical Terex Cranes Germany GmbH
Publication of EP2725236A2 publication Critical patent/EP2725236A2/fr
Publication of EP2725236A3 publication Critical patent/EP2725236A3/fr
Application granted granted Critical
Publication of EP2725236B1 publication Critical patent/EP2725236B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/027—Installations or systems with accumulators having accumulator charging devices
    • F15B1/033—Installations or systems with accumulators having accumulator charging devices with electrical control means
    • 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
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • 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
    • F15B1/26—Supply reservoir or sump assemblies
    • 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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • 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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • 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

Definitions

  • the present invention relates to a telescoping unit for telescoping means arranged on machines, comprising at least one telescopic hydraulic cylinder and at least one in the cylinder chamber of the telescopic hydraulic cylinder arranged axially movable and connected to a piston rod piston, wherein the bottom side or the piston rod side of the telescopic hydraulic cylinder on one of the machine associated bearing is formed fixable and at the free end of the telescoping unit is associated with at least one further hydraulic system, which is acted upon by a hydraulic medium with hydraulic energy.
  • a mobile crane with telescopic boom with small counterweight can lift large loads, the boom must be as small as possible. Especially with larger working radii, it is necessary to keep the weight of the outrigger parts projecting beyond the support base as small as possible. Even when transporting a mobile crane, it is cheaper if the lowest possible weight has to be moved.
  • the SVE is located at the exposed end of the telescopic hydraulic cylinder.
  • the hydraulic energy is therefore also needed at this point, so that the boxes can be unlocked or locked.
  • the disadvantage here is that exactly this point is driven back and forth with the telescopic hydraulic cylinder.
  • the SVE is not directly accessible for hydraulic lines.
  • the first buffer is automatically loaded with the hydraulic medium as soon as the pressure of the hydraulic medium in the telescopic hydraulic cylinder is higher than the pressure of the hydraulic medium in the first buffer.
  • the second intermediate store is automatically discharged from the hydraulic medium as soon as the pressure of the hydraulic medium in the telescopic hydraulic cylinder is less than the pressure of the hydraulic medium in the second intermediate store.
  • the pressures in the latches are measured with pressure transducers and the measured pressure data is processed by a computer or sent directly to a control unit.
  • the buffers act as storage tanks, which buffer the high and low pressures in the hydraulic system.
  • the process of loading and unloading the buffer can, depending on the version, even occur at the same time.
  • the telescoping unit In the telescoping unit according to the invention, it is provided to connect at least two buffer stores, one each for the high pressure and one for the low pressure, which are in operative connection with the hydraulic system (for example an SVE) with the telescoping unit hydraulically.
  • the number of buffers should not be limited to this.
  • the supply of hydraulic power to the hydraulic system is provided by the temporary storage guaranteed.
  • the latches may be formed here as a bladder accumulator or piston accumulator or spring accumulator.
  • the memory for the high pressure and for the different low pressure to be connected via check valves directly to the telescopic hydraulic cylinder.
  • the first buffer for the high pressure is automatically filled, or pressurized via the hydraulic medium, that is charged with hydraulic energy when the hydraulic pressure in the bottom space of the telescopic hydraulic cylinder is higher than the pressure in the first intermediate store itself. This can be the case, for example, during telescoping, under static load or during extension of the telescopic hydraulic cylinder in the bolted and secured state until it stops.
  • the second intermediate store is automatically discharged from the hydraulic medium as soon as the pressure of the hydraulic medium in the telescopic hydraulic cylinder is less than the pressure of the hydraulic medium in the second intermediate store.
  • This may for example be the case when the bottom-side valve of the telescopic hydraulic cylinder is opened (i.e., the friction is greater than the static load) or the telescopic hydraulic cylinder is retracted in the bolted and secured state until it stops.
  • the pressures in the buffer with pressure transducers can be measured and processed in a controller.
  • control unit and / or the computer controls the telescoping unit in response to the pressure data determined and sent to it by the pressure sensors in order to load the buffer memories with hydraulic energy by changing the driving condition or to unload.
  • the controller controls the hydraulic system via the pressure transducer to pressurize the hydraulic system with hydraulic energy as soon as the controller determines in the first latch for the placement of the hydraulic system insufficient amount of hydraulic energy.
  • the pressure sensors are designed so that they the pressure of the hydraulic medium can convert to a proportional electrical signal.
  • the hydraulic system is supplied with the hydraulic medium via the rod side of the telescopic hydraulic cylinder in a hydraulic two-way single-space circuit.
  • the supply of the hydraulic system with the hydraulic medium via the bottom side by the piston rod of the telescopic hydraulic cylinder in a hydraulic two-way single-space circuit in another embodiment, the supply of the hydraulic system with the hydraulic medium via the bottom side by the piston rod of the telescopic hydraulic cylinder in a hydraulic two-way single-space circuit.
  • the hydraulic system is supplied with the hydraulic medium via the rod side of the telescopic hydraulic cylinder with a hydraulic two-way two-space circuit.
  • the oil supply of the hydraulic system via the bottom side of the telescopic hydraulic cylinder can be done with a hydraulic two-way two-space circuit.
  • the supply of the hydraulic system with the hydraulic medium via the rod side or the bottom side of the telescopic hydraulic cylinder with a four-way two-space circuit is advantageous embodiment, the supply of the hydraulic system with the hydraulic medium via the rod side or the bottom side of the telescopic hydraulic cylinder with a four-way two-space circuit.
  • the oil supply takes place for the hydraulic system, on the bottom side and piston rod side of the telescopic hydraulic cylinder in a hydraulic three-way two-space circuit, wherein the hydraulic system is connected to the cylinder tube of the telescopic hydraulic cylinder and the returning oil only is directed into the bottom side.
  • Telekopierü oil supply for the hydraulic system via the piston rod and bottom side of the telescopic hydraulic cylinder takes place in a hydraulic three-way two-space circuit, in which case the hydraulic system is connected to the cylinder tube of the telescopic hydraulic cylinder and the pressure oil only is taken from the bottom side. It is also possible to remove the pressure oil from the piston rod side.
  • the hydraulic system is connected to the piston rod of the telescopic hydraulic cylinder and the return oil only in the Bottom side can be passed. Also, the return oil could only be directed into the piston rod side.
  • the oil supply to the hydraulic system is possible from the bottom side and piston rod side of the telescopic hydraulic cylinder in a three-way two-way hydraulic circuit, where the hydraulic system is connected to the cylinder tube of the telescopic hydraulic cylinder and the returning oil can only be directed to the rod side.
  • the oil supply for the hydraulic system can be done via the piston rod and bottom side of the telescopic hydraulic cylinder in a hydraulic three-way two-space circuit, the hydraulic system is connected to the piston rod of the Teleskophydraulikzylinders and the pressure oil only from the rod side is removed.
  • the telescoping unit 10 essentially consists of at least one telescopic hydraulic cylinder 11 and at least one axially displaceable in the cylinder tube 12 of the telescopic hydraulic cylinder 11 and connected to a piston rod 13 piston 14.
  • the bottom side 15 or the piston rod side 16 of the telescopic hydraulic cylinder 11 is at one of Machine or part of the machine (not shown) associated bearing not shown) attached.
  • the free end 17 of the telescoping unit 10 is assigned at least one hydraulic system 18.
  • the hydraulic system 18 is formed in this embodiment as SVE.
  • the hydraulic system 18 may be configured to install / remove implements.
  • the bolting and Entbolzen of equipment for example, to rotate, close and open of devices such as pliers, grippers, loading troughs and lifts are conceivable.
  • a hydraulic medium acted upon by hydraulic energy and forwarded to the hydraulic system 18.
  • the hydraulic system 18 is, as in Fig. 1 shown connected to the bottom side 15 of the telescopic hydraulic cylinder 11 via a line 19.
  • the line 19 has a fork 20, which divides the line 19 into a feed line 21 and a return line 22. So that the hydraulic medium can flow in each case only in a predetermined direction in the feed line 21 and the return line 22, correspondingly designed valves 23 and 24 are provided.
  • the valves 23 and 24 are formed in this embodiment as check valves.
  • the check valve 23 prevents the unwanted reflux of the hydraulic medium from the supply line 21 back to the bottom side 15 of the telescopic hydraulic cylinder 11.
  • the supply line 21 is associated with a bypass 25 which is connected to a first latch 26.
  • the buffer 26 is designed as a bladder accumulator in this embodiment.
  • the supply line 21 is connected to a control unit 27.
  • the control unit 27 is in turn connected to the hydraulic system 18 via the supply line 21a.
  • the control unit 27 detects and regulates the demand for hydraulic energy and provides it to the hydraulic system 18, if necessary, from the buffer 26.
  • the "relaxed" hydraulic medium from the hydraulic system 18 is now directed into a return line 22a.
  • the return flow of the hydraulic medium is regulated by the control unit 27 connected to the return line 22a.
  • the expanded hydraulic medium is passed via a bypass 25a into a second intermediate store 28 with a hydraulic medium having a lower pressure than the first intermediate store 26 and stored therebetween.
  • a backflow of the hydraulic medium by the control unit 27 and then further into the hydraulic system 18 is avoided by the control unit 27.
  • the check valve 24 is connected to the supply line 19, from where the hydraulic medium is pushed back into the cylinder chamber 12 at the appropriate opportunity.
  • the hydraulic system 18, the control unit 27, and the latches 26, 28 together with the supply and return lines 19, 21, 21 a and 22, 22 a and the check valves 23 and 24 are formed movable together with the telescopic hydraulic cylinder 11.
  • the hydraulic system 18 can be stored floating.
  • the hydraulic medium is stored in a reservoir 29, from where it is provided by means of a hydraulic pump 30 via adjusting and control means 31 to the telescopic hydraulic cylinder 11.
  • the Fig. 1 shows the telescoping unit 10 according to the invention in a first embodiment in which the supply of the hydraulic system 18 with a hydraulic medium on the cylinder tube 12 of the telescopic hydraulic cylinder 11, from the bottom side 15, with a hydraulic two-way single-space circuit.
  • the Fig. 2 shows the telescoping unit 10 according to the invention in a second embodiment in which the supply of the hydraulic system 18 with a hydraulic medium, by the piston rod 13 to the bottom side of the telescopic hydraulic cylinder 11, with a hydraulic two-way one-space circuit.
  • the hydraulic medium can be directed from the piston rod side 16 via a return line 32 a to the adjusting and control means 31, from where it is pumped back into the reservoir 29.
  • the Fig. 3 shows the Teleskopiereinehit 10 of the invention in another embodiment.
  • the hydraulic system 18 is supplied with a hydraulic medium via the cylinder tube 12 from the bottom side 15 of the telescopic hydraulic cylinder 11 by means of a hydraulic two-way two-space circuit.
  • the relaxed hydraulic medium from the buffer 28 via the bypass 25a through the valve 24 via a return line 32 to the piston rod side 16 of the telescopic hydraulic cylinder 11 is passed.
  • the Fig. 4 also shows an embodiment of the telescoping unit 10 according to the invention.
  • the hydraulic system 18 is supplied with a hydraulic medium, as in Fig. 2 represented, also by the piston rod 13 to the bottom and rod side 15 and 16 of the telescopic hydraulic cylinder 11.
  • a hydraulic medium as in Fig. 2 represented, also by the piston rod 13 to the bottom and rod side 15 and 16 of the telescopic hydraulic cylinder 11.
  • the embodiment as in Fig. 3 designed as a hydraulic two-way two-space circuit.
  • the Fig. 5 shows a further embodiment of the inventive telescopic unit 10 in which the coupling of high pressure and low pressure takes place with a four-way two-space circuit.
  • the feed line 21 and the return line 22 are connected via check valves to the bottom side 15 of the telescopic hydraulic cylinder 11 in this embodiment.
  • the inlet, or the return of the hydraulic medium is regulated by the valves 23, 24.
  • a further line 35, 36 associated with the supply line or the return line of the hydraulic medium via additional, the line 35, 36 associated valves 37, 38 controls the piston rod side 16.
  • the Fig. 6 is also an embodiment of the telescoping unit 10 according to the invention with which the coupling of high pressure and low pressure with a four-way two-space circuit, as shown in Fig. 5 described, takes place.
  • Additional buffers 39 and 40 are provided for the intermediate buffers 26 and 28 and are connected via a bypass line 41 and 41a to a pressure sensor 42, 42a.
  • Tailored is the bypass line 41 and 41 a to the supply line 21 and return line 22, which in turn is connected to the line 35 and 36 on the rod side 33, or with the piston rod side 16 of the cylinder chamber 12.
  • the pressure transducer 42, 42 a detects the pressure drop or the pressure build-up in the latches 26, 28 and 39, 40 and converts the hydraulic pressure into electrical signals. This signal provides for the compensation of hydraulic medium or pressure, in the event that are used in an electrical control (not shown) to to free the control unit 27 and the buffers 26, 28 and 29, 40 by the telekopieren to load or unload.
  • the check valves 23, 24 and 37, 38 are replaced by electric seat valves. These electric seat valves are then controlled by an electrical control, taking into account the pressure transducer signals of the pressure transducer 42, 42 a.
  • the Fig. 7 also shows an embodiment of the telecopying unit 10 according to the invention.
  • the supply of the hydraulic system 18 with a hydraulic medium takes place, as in the Fig. 4 represented, also by the piston rod 13 to the bottom and rod side 15, 16 of the telescopic hydraulic cylinder 11.
  • this embodiment is as in Fig. 5 , designed as a hydraulic four-way two-space circuit.
  • the Fig. 8 shows the telescoping unit 10 according to the invention in a further embodiment in analogy to the illustration in FIG Fig. 3 , Here, however, the supply of the hydraulic system 18 with a hydraulic medium via the cylinder tube 12 from the piston rod side 16 of the telescopic hydraulic cylinder 11.
  • the relaxed hydraulic fluid from the buffer 28 via the bypass 25a through the valve 24 via the return line 32 to the bottom side 15 of the Telescopic hydraulic cylinder 11 passed.
  • the Fig. 9 also shows an embodiment of the telescoping unit 10 according to the invention.
  • the hydraulic system 18 is supplied with a hydraulic medium, as in FIG Fig. 4 also represented by the piston rod 13 to the bottom and rod side 15, 16 of the telescopic hydraulic cylinder 11.
  • the embodiment is, as in Fig. 4 , designed as a hydraulic two-way two-space circuit. But unlike Fig. 4 Here are the charge-discharge lines connected to the piston rod 13 rotated. Thus, the hydraulic medium is pressed from the piston rod side 16 in the memory 26 and from the memory 28, the return takes place in the bottom side 15th
  • the Fig. 10 shows the telescoping unit 10 according to the invention in a further embodiment, in which the supply of the hydraulic system 18 with a hydraulic medium, on the cylinder tube 12 from the piston rod side 16 of the telescopic hydraulic cylinder 11 takes place with a hydraulic two-way single-space circuit.
  • the Fig. 11 shows the telescoping unit 10 according to the invention in a further embodiment, in which the supply of the hydraulic system 18 with a hydraulic medium, by the piston rod 13 to the piston rod side 16 of the telescopic hydraulic cylinder 11, with a "two-way single-space circuit".
  • the Fig. 12 shows the telescoping unit 10 according to the invention in a further embodiment in the supply of the hydraulic system 18 with a hydraulic medium, analog Fig. 5 he follows. But the return line 36 and the valve 38 in Fig. 5 omitted here. This embodiment is thus a "three-way two-space circuit".
  • the Fig. 13 shows the telescoping unit 10 according to the invention in a further embodiment in the supply of the hydraulic system 18 with a hydraulic medium, analog Fig. 5 he follows. But here the return line 36 and the valve 38 are retained, but the valve 24 is omitted It is also a "three-way two-space circuit".
  • the Fig. 14 shows the telescoping unit 10 according to the invention in a further embodiment in the supply of the hydraulic system 18 with a hydraulic medium, analog Fig. 5 he follows.
  • the reservoir 26 is pressurized only via the valve 23 from the bottom side 15.
  • the line 35 and the valve 37 are omitted.
  • This version is also a "three-way two-space circuit"
  • the Fig. 15 shows the telescoping unit 10 according to the invention in a further embodiment in the supply of the hydraulic system 18 with a hydraulic medium, analog Fig. 5 he follows. Now, the supply of the memory 26 takes place only via the valve 37 and the line 35 from the piston rod side 16 with pressure. The valve 23 is omitted. This version is again a "three-way two-space circuit"
  • the Fig. 16 shows the telescoping unit 10 according to the invention in a further embodiment in the supply of the hydraulic system 18 with a hydraulic medium, analog Fig. 7 , So by the piston rod 13, takes place.
  • the medium from the reservoir 26 can only flow back into the bottom side 15 via the valve 24.
  • Valve 38 is not installed. This is also a "three-way two-space circuit.
  • the Fig. 17 shows the telescoping unit 10 according to the invention in a further embodiment in the supply of the hydraulic system 18 with a hydraulic medium, analog Fig. 7 , he follows.
  • the medium from the reservoir 26 can only flow back into the rod side 16 via the valve 38.
  • valve 24 is not installed. It is also a "three-way two-space circuit".
  • the Fig. 18 shows the telescoping unit 10 according to the invention in a further embodiment in the supply of the hydraulic system 18 with a hydraulic medium, analog Fig. 7 , he follows.
  • the reservoir 26 is pressurized only via the valve 23 from the bottom side 15.
  • valve 37 is not installed. It is also a "three-way two-space circuit".
  • the Fig. 19 shows the telescoping unit 10 according to the invention in a further embodiment in the supply of the hydraulic system 18 with a hydraulic medium, analog Fig. 7 , he follows.
  • the pressure supply of the memory 26 takes place only via the valve 37 and only from the rod side 16. There is no charging connection to the bottom side 15. Again, there is a "three-way two-space circuit".

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Actuator (AREA)
EP13075064.9A 2012-10-29 2013-09-16 Unité télescopique avec fonction supplémentaire Active EP2725236B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012021544.4A DE102012021544B4 (de) 2012-10-29 2012-10-29 Teleskopiereinheit mit Zusatzfunktion

Publications (3)

Publication Number Publication Date
EP2725236A2 true EP2725236A2 (fr) 2014-04-30
EP2725236A3 EP2725236A3 (fr) 2016-05-18
EP2725236B1 EP2725236B1 (fr) 2019-05-22

Family

ID=49304669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13075064.9A Active EP2725236B1 (fr) 2012-10-29 2013-09-16 Unité télescopique avec fonction supplémentaire

Country Status (4)

Country Link
US (1) US20140116040A1 (fr)
EP (1) EP2725236B1 (fr)
CN (1) CN103790891B (fr)
DE (1) DE102012021544B4 (fr)

Cited By (1)

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WO2018028942A1 (fr) * 2016-08-12 2018-02-15 Robert Bosch Gmbh Système hydraulique et mécanisme ressort-amortisseur

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DE102014222326B4 (de) 2014-10-31 2016-06-09 Tadano Faun Gmbh Hydraulikanordnung
US10604386B2 (en) * 2016-03-03 2020-03-31 Tadano Ltd. Expansion/contraction mechanism
WO2020204157A1 (fr) * 2019-04-04 2020-10-08 株式会社タダノ Machine de travail

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2018028942A1 (fr) * 2016-08-12 2018-02-15 Robert Bosch Gmbh Système hydraulique et mécanisme ressort-amortisseur
GB2567994A (en) * 2016-08-12 2019-05-01 Bosch Gmbh Robert Hydraulic system and a spring-damper mechanism

Also Published As

Publication number Publication date
CN103790891A (zh) 2014-05-14
DE102012021544B4 (de) 2014-07-10
CN103790891B (zh) 2017-04-12
DE102012021544A1 (de) 2014-04-30
EP2725236A3 (fr) 2016-05-18
EP2725236B1 (fr) 2019-05-22
US20140116040A1 (en) 2014-05-01

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