Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
  • B66C23/62—Constructional features or details
  • B66C23/72—Counterweights or supports for balancing lifting couples
  • B66C23/78—Supports, e.g. outriggers, for mobile cranes
  • B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
  • B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
  • B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
  • B60S9/10—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure
  • B60S9/12—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting by fluid pressure of telescopic type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
  • B66C23/88—Safety gear
  • B66C23/90—Devices for indicating or limiting lifting moment
• • 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
  • 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
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
  • G01L1/00—Measuring force or stress, in general
  • G01L1/02—Measuring force or stress, in general by hydraulic or pneumatic means
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
  • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
  • G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
  • G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre

Definitions

• the invention relates to a hydraulically telescopic support device for a vehicle - in particular for a mobile loading crane -, with a hydraulically movable piston-cylinder unit for extending and retracting the support device and a hydraulic system with a first hydraulic circuit for moving the piston-cylinder unit and a hydraulic force measuring device for determining a supporting force which acts on the supporting device. Furthermore, the invention relates to a vehicle, in particular a mobile loading crane, with at least one hydraulically telescoping supporting device of the type described.
• the determination of the support force in vehicle support devices is already known from the prior art.
• One way to measure this support force may be via electrical and / or electronic force measuring devices preferably located in the backing pad, i. are arranged near the point of application of the supporting force.
• a disadvantage of this method is the high cost of the measuring device and the wiring upwards, from the support plate to the area of the cylinder attachment.
• Another method for determining positive forces is a pressure measurement in the cylinder itself (piston and rod side). From the measured pressures can be recalculated on the support force. This method is much cheaper than the one described above.
• a disadvantage is the friction of the piston rod, which can be very large especially when fully extended piston rod and the occurrence of lateral forces. The support force is then partly on these bearings in the adjacent construction and the pressure in the cylinder no longer represents the actual supporting force.
• the object of the invention is to provide a comparison with the prior art improved hydraulically telescoping support device.
• a hydraulically teieskopierbare supporting device with the features of claim 1.
• the hydraulic force-measuring device has a second hydraulic circuit independent of the first hydraulic circuit of the hydraulic system, at least during the determination of the supporting force, the working medium-which normally is oil-can not escape from the second independent and closed hydraulic circuit during the determination of the supporting force, because at least during the measurement, there is no connection between the first hydraulic circuit of the hydraulic system and the second hydraulic circuit of the hydraulic system.
• the second hydraulic circuit is formed at least partially - preferably substantially completely - within the piston-cylinder unit. Due to the design of the second hydraulic circuit within the piston-cylinder unit of the support device, a particularly compact design for a hydraulically telescoping support device can be achieved. According to a preferred embodiment it can be provided that the force-measuring device has at least two nested tubes which are telescopically movable relative to each other. Due to the formation of two nested tubes for the force measuring device, the volume of the working medium (oil) relevant for the force measurement can be kept low, which can also have a positive effect on the accuracy of the measurement.
• the piston-cylinder unit comprises a cylinder, a piston and a piston rod, wherein one of the two tubes is stationary in the cylinder of the piston-cylinder unit and the second tube with a first end fixed in the Piston rod of the piston-cylinder unit is formed.
• the two nested tubes move together with the cylinder or the piston rod.
• the second tube is formed with a second end stationary in the piston of the piston-cylinder unit.
• the force measuring device at the first end of the second tube has a lid with an opening to a variable volume chamber, wherein the lid is fixed in the piston rod of the piston-cylinder unit.
• Fig. 1a is a schematic representation of a hydraulically telescoping
• 1b is a schematic representation of a supporting device in the extended state during the determination of the supporting force
• FIG. 2 is a detail view of Fig. 2,
• Fig. 5 shows a section through a variant of a supporting device in the supported state
• Fig. 6 is a side view of a vehicle with loading crane and several hydraulically teieskopierbaren supporting devices.
• FIG. 1a and 1b show a schematic representation of a hydraulically telescopic supporting device 100 for a vehicle - in particular for a mobile loading crane - with a hydraulically movable piston-cylinder unit 101 - consisting of the cylinder 104, the piston 105 and the piston rod 106 - for extending and retracting the support device 100 and a hydraulic system 102 with a first hydraulic circuit 103 for moving the piston-cylinder unit 101 and a hydraulic force measuring device 10 for determining the supporting force acting on the support device 100.
• the hydraulic force measuring device 10 has an independent during the determination of the support force, independent of the first hydraulic circuit 103 of the hydraulic system 102 second hydraulic circuit 11, as shown in Figure 1 b.
• the Koiben-cylinder unit 101 can thereby via the extension line 112 of Hydraulic system 102 extended and retracted via the entry line 1 11 of the hydraulic system 102.
• the separation of the second hydraulic circuit 11 of the hydraulic system 102 from the first hydraulic circuit 103 takes place in this preferred embodiment in the entry line 11 of the hydraulic system 102 through a 2/2-way valve 13.
• the determination of the supporting force, which acts on the supporting device 100, takes place at a first end 12 of the first tube 1 of the force-measuring device 10.
• the essential components of the force measuring device 10 are the following:
• the second hydraulic circuit 11 of the hydraulic system 102 is here designed as an open circuit and extends substantially from the sensor 14 to the first tube 1, on to the second tube 2 and into the chamber 4.
• FIG. 2 shows a section through a hydraulically telescopic supporting device 100.
• the supporting device 100 has a piston-cylinder unit 101 with a Cylinder 104, a piston 105 and a piston rod 106.
• the two nested tubes 1 and 2 of the force measuring device 10 are formed in this preferred embodiment.
• the two nested tubes 1 and 2 are telescopically movable relative to each other and guided tightly to the piston-cylinder Einhett 101.
• the tube 1 is fixedly formed in the cylinder 104 of the piston-cylinder unit 101 and the second tube 2 is formed with a first end 21 fixed in the piston rod 106 of the piston-cylinder unit 101.
• the second tube 2 is fixedly formed in the piston 105 of the piston-cylinder unit 101.
• the lid 3 is formed with its opening 31 through which the working medium passes into the chamber 4, which is variable in its volume 41.
• volumetric flask 6 connects to the chamber 4 of the designed as a plunger 5 to the chamber 4 of the designed as a plunger 5 volumetric flask 6 connects.
• This volumetric flask 6 is designed at the lower end of the piston rod 106, which is mounted displaceably on a short path in a guide unit 7 screwed into the piston rod 106 from below.
• the first tube 1 and the second tube 2 which in this embodiment has a larger diameter than the tube 1, the volume of the Hydrauiikkieris 11 for the pressure measurement kept low, the compression of the working medium and thus the way for the measurement is thus kept short possible mögiich.
• the tube 2 in the piston rod 106 opens at its lower end 21 in the lid 3, which is mounted in the piston rod 106 and is sealed to the plunger 5 formed measuring piston 6 and the piston rod inside.
• the volumetric flask 6 is set down and guided similar to a piston rod and sealed to the outside.
• the hydraulic circuit 11 active in the support 100 is decoupled from that of the vehicle 200 and is used exclusively for pressure measurement or assistive force determination.
• the working fluid - which is normally oil - is compressed in the hydraulic circuit 11.
• the measured pressure can be used to draw conclusions about the support force.
• the pressure measurement is preferably carried out at the upper end 12 of the first tube 1.
• the working fluid can not escape during the measurement, the leading of the Einfahrtechnisch 1 11 of the first hydraulic circuit 103 connecting line 1 13 is shut off (by the 2/2-way valve 13, see FIG. 1b).
• valve 13 In order to compensate for losses of hydraulic fluid during prolonged operation due to leakage, the valve 13 is opened in the connecting line 113 in the retracted state or shortly before decommissioning, released the starting pressure in the hydraulic force measuring device 10 and the plunger 5 formed as a measuring piston 6 fully extended. At each decommissioning (ie complete retraction of the support device 100 to stop) so that the hydraulic force measuring device 10 is thus reset to an original state.
• the circuit of the valve 13 may e.g. electromagnetically.
• a already existing for the monitoring of the retracted position existing proximity switch in the upper region of the cylinder 104 can for the switching signal! of the Ventiis 13 are used.
• the start-up pressure remains the same in a completely sealed system in the chamber 4, but this drops in the extension of the piston-cylinder unit 101 in the short term by increasing the volume at a closing of the Ventiis 13 and by pulling the tube 1 from the tube 2 again from.
• the volumetric flask 6 moves in accordance with the reduction of the volume by pulling out the tube 1.
• the measuring piston 6 in this preferred embodiment further comprises a plunger cover 54, a plunger line 51, a plunger 52 and another plunger chamber 53 ( Figures 3 and 4) which are connected to the chamber 4, thereby increasing the available volume in the hydraulic force measuring device the working medium increases, which on the one hand has a positive effect on the accuracy of the measurement and on the other hand has a positive effect on the guidance of the measuring piston 6 in the guide unit.
• a plunger cover 54 a plunger line 51, a plunger 52 and another plunger chamber 53 ( Figures 3 and 4) which are connected to the chamber 4, thereby increasing the available volume in the hydraulic force measuring device the working medium increases, which on the one hand has a positive effect on the accuracy of the measurement and on the other hand has a positive effect on the guidance of the measuring piston 6 in the guide unit.
• Figure 5 shows a variant of a hydraulically movable piston-cylinder unit 101
• the tube 2 is not a separate tube here, but the piston rod 106 acts here as a tube 2.
• a filling tube 8 is now inserted in the interior of the piston rod 106 of the piston-cylinder unit 101, around the remaining volume 41 massively decrease for the working medium. It is preferably provided that the filling tube 8 is formed on the one hand of plastic and on the other hand, it is envisaged to store this filling tube 8 floating in the piston rod 106 of the piston-cylinder unit 101. Likewise, it is of course conceivable that one fixes the filling tube 8 in the piston rod 106 of the piston-cylinder unit 101, be it at its second end 22 fixed to the piston 105 or at the other end fixed to the plunger cover 54th
• the essential components of the force measuring device 10 are in this embodiment the following:
• the tube 2 represents the piston rod 106
• volumetric flask 6 designed as a plunger
• variable chamber 4 In its volume 41 variable chamber 4 and
• the second hydraulic circuit 11 of the hydraulic system 102 is formed here as an open circuit and extends substantially from the sensor 14 to the first tube 1 and on to the chamber 4 of the piston rod 106th
• the volume of the hydraulic circuit 11 in the piston rod 106 can be kept low for the pressure measurement, the compression of the working medium and thus the way for the measurement is thus kept as short as possible,
• a hydraulically telescoping support device 100 for a vehicle 200 - in particular for a mobile loading crane 201 - is formed with a hydraulically movable piston-cylinder unit 101 for extending and retracting the support device 100 and a hydraulic system with a first hydraulic circuit 103 for moving the piston cylinders 100, 101 and a hydraulic force measuring device 10 for determining a supporting force which acts on the supporting device 100, the hydraulic force measuring device 10 being independent of the first hydraulic circuit 103 of the hydraulic system 102 at least during the determination of the braking force, second hydrauük Vietnamese 11 has.
• the second hydraulic circuit 11 is at least partially - preferably substantially completely - formed within the Koiben cylinder Einhest 101.
• the force measuring device 10 has at least two nested tubes 1 and 2, which are telescopically formed to each other movable. It is preferably provided that one of the at least two nested tubes 1 or 2 is a piston rod 106 of the piston-cylinder unit 101.
• FIG. 6 shows a vehicle 200, which is designed as a loading crane 101. This has the crane 202 and the driver's cab 203. In order to support the vehicle 200 in crane operation, the vehicle 200 has a plurality of hydraulically telescoping outrigger 100.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• General Engineering & Computer Science (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Analytical Chemistry (AREA)
• Actuator (AREA)
• Jib Cranes (AREA)
• Force Measurement Appropriate To Specific Purposes (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=48983452

Family Applications (1)

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Cited By (6)

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Citations (1)

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• 2013
  • 2013-02-12 PL PL13709727T patent/PL2815135T3/pl unknown
  • 2013-02-12 BR BR112014019821-7A patent/BR112014019821B1/pt active IP Right Grant
  • 2013-02-12 EP EP13709727.5A patent/EP2815135B1/de active Active
  • 2013-02-12 DK DK13709727T patent/DK2815135T3/da active
  • 2013-02-12 WO PCT/AT2013/000024 patent/WO2013120118A1/de not_active Ceased
  • 2013-02-12 CN CN201380014498.0A patent/CN104204549B/zh active Active
  • 2013-02-12 ES ES13709727T patent/ES2750173T3/es active Active
  • 2013-02-12 AU AU2013220952A patent/AU2013220952B2/en active Active
• 2014
  • 2014-08-04 US US14/450,568 patent/US10442665B2/en active Active

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