EP2392540A1 - Chariot de manutention - Google Patents

Chariot de manutention Download PDF

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Publication number
EP2392540A1
EP2392540A1 EP11004516A EP11004516A EP2392540A1 EP 2392540 A1 EP2392540 A1 EP 2392540A1 EP 11004516 A EP11004516 A EP 11004516A EP 11004516 A EP11004516 A EP 11004516A EP 2392540 A1 EP2392540 A1 EP 2392540A1
Authority
EP
European Patent Office
Prior art keywords
acting
pressure chamber
support
truck according
pressure
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
EP11004516A
Other languages
German (de)
English (en)
Other versions
EP2392540B1 (fr
Inventor
Hans-Ulrich Knechtel
Nikos Urbanczyk
Holger Spahn
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.)
Linde Material Handling GmbH
Original Assignee
Linde Material Handling 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 Linde Material Handling GmbH filed Critical Linde Material Handling GmbH
Publication of EP2392540A1 publication Critical patent/EP2392540A1/fr
Application granted granted Critical
Publication of EP2392540B1 publication Critical patent/EP2392540B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07513—Details concerning the chassis
    • B66F9/0754—Battery removal arrangements

Definitions

  • the invention relates to an industrial truck, in particular counterbalance forklift truck, comprising a vehicle body and a power supply unit arranged inside the vehicle body, in particular a battery pack, wherein the vehicle body is provided with a lateral opening and the power supply unit through the lateral opening in the horizontal direction relative to the battery compartment is movable, wherein the power supply unit stands up on a slide carriage, which is arranged in the battery compartment in the transverse direction displaceable and movable between an operating position and a change position, and wherein the truck comprises a pendulum-suspended steering axle.
  • a battery block, a fuel cell unit or a hybrid drive unit can be provided as the energy supply unit.
  • the energy supply unit present in the truck is moved partially or completely out of the battery compartment of the truck in the horizontal and lateral direction.
  • the power supply unit can then be raised in this change position, for example, with a hall crane and transported on.
  • the power supply unit on a movable in the transverse direction of the truck thrust carriage, the thrust carriage by means of a drive means between an operating position in which the thrust slide is located thereon with the power supply unit within the battery compartment, and a change position is movable in the thrust slide with the power supply unit is at least partially moved out of the lateral opening.
  • An industrial truck with a lateral change of the power supply unit and a sliding carriage is from the DE 103 47 065 A1 known.
  • the overall center of gravity of the truck by the outside of the stationary triangle, that of the wheel base of a front axle and the pendulum joint of a steering axle in a truck in four-wheel design or that of the wheel base of a front axle and the steerable third wheel in a truck is formed in tricycle design, arranged weight of the power supply unit move so that the truck tilts laterally and there is a risk that the truck tilts. For a safe and easy change of the power supply unit this danger is excluded.
  • a truck with a lateral change known as a battery block power supply device known.
  • a thrust carriage on which the battery pack rests, moves laterally out of a battery compartment of the industrial truck in the horizontal direction or moves into the battery compartment.
  • a supporting device is arranged in the region of the outer edge of the sliding carriage, which is movable between a support position lowered onto the roadway and a raised position ,
  • the supporting device of DE 10 2008 032 305 A1 is provided with a rolling on the road surface support roller and can be manually acted upon in the direction of a pedal operation against the force of a spring in a support position to achieve a support of the sliding carriage during retraction and extension over the support roller on the road surface.
  • a supporting device arranged on the sliding carriage which supports the sliding carriage with a supporting roller on extension and retraction of the sliding carriage on the road surface, causes problems on uneven road surface, since an insufficient adaptation of the supporting roller to the roadway level can result.
  • the carrying capacity of such a support roller is limited, so that in energy supply units with a correspondingly high weight, for example, large battery blocks weighing more than one Ton, several support rollers and supporting devices must be provided in order to support the weight of the power supply unit on the slide carriage on the road surface can.
  • the present invention has for its object to provide an industrial truck of the type mentioned, in which a safe and easy change of the power supply unit is made possible regardless of the nature of the road surface and high weight of the power supply unit.
  • the vehicle body is provided with a supporting device that automatically locks the vehicle body relative to a lateral tilting when extending the sliding carriage from the operating position to the change position and when retracting the sliding carriage from the change position to the operating position.
  • the idea according to the invention therefore consists in locking the vehicle body directly against lateral tilting when changing the energy supply unit with an automatically actuated supporting device.
  • the supporting device according to the invention which is directly connected to the vehicle body and locks it against lateral tilting occurs when extending and retracting the sliding carriage no relative movement on the support device, so that the support device regardless of the nature of the road surface the truck safely against a Lateral tilting locked.
  • the supporting device with a counterweight of the vehicle body or a driver's roof or a frame member of the vehicle body in operative connection and supports the vehicle body on the road surface.
  • a support device which is in operative connection with the counterweight or a driver's roof or a frame member and thus the vehicle body and goes in a support position on the ground, the vehicle body can be locked in a simple manner when changing the power supply unit against lateral tilting.
  • the supporting device is in operative connection with a counterweight of the vehicle body or a driver's protective roof or a frame component of the vehicle body and locks the vehicle body relative to the pendulum-suspended steering axle.
  • the pendulum bearing of the steering axle can be blocked, whereby the tipping line of the truck is displaced to the outside, and thus a lateral tilting of the truck when changing the power supply unit can be avoided in a simple and secure manner.
  • the support device may also be in operative connection with a tilt drive support of the vehicle body, which may be formed as part of the driver's roof or the vehicle frame or as a separate component.
  • the Ausschubzylinderinnate may in this case be formed by a double-acting hydraulic cylinder having an acting in the direction of the operating position pressure chamber for retracting the sliding carriage and acting in the direction of the change position pressure chamber for extending the sliding carriage. It is alternatively possible to form the Ausschubzylinderan extract of two oppositely arranged single-acting hydraulic cylinders to extend the thrust carriage in the change position and retract into the operating position.
  • the support device is formed by a hydraulic Abstützzylinder Surprise.
  • a hydraulic support cylinder can be locked with little construction effort and in a simple way, the vehicle body when changing the power supply unit against lateral tilting or tilting.
  • the Ausschubzylinder boots has a force acting in the direction of the change position pressure chamber and acting in the direction of the operating pressure chamber and the Abstweilzylinder listening is designed as a single-acting cylinder having a force acting in the direction of the support pressure chamber, wherein acting in the direction of the support position Pressure chamber of the support cylinder device is connected to the force acting in the direction of the change position pressure chamber Ausschubzylinder immunity.
  • the support cylinder device is preferably acted upon by means of a spring device in the direction of a release position.
  • a single-acting support cylinder can be retracted by means of a spring device in a simple manner for releasing the locking of the vehicle body after the change of the power supply unit by means of a spring device in a release position.
  • the Ausschubzylinder novelty has a force acting in the direction of the change position pressure chamber and acting in the direction of the operating position pressure chamber and the Abstauerzylinder listening is designed as a double-acting cylinder, the one in the direction of the support position acting pressure chamber and acting in the direction of the release position pressure chamber, wherein the force acting in the direction of the support position pressure chamber of Abstauerzylinder recognized is connected to the acting in the direction of change pressure chamber Ausschubzylinder boots and acting in the direction of the release position pressure chamber of the AbstNeillzylinder observed with the in the direction of the operating position acting pressure chamber of Ausschubzylinder listening is connected.
  • the vehicle body With a double-acting support cylinder, the vehicle body can be easily locked in the support position against lateral tilting and in the release position, the lock can be canceled. If, in such a double-acting support cylinder, the pressure chamber of the support cylinder device acting in the direction of the support position is connected to the pressure chamber of the Ausschubzylinder adopted acting in the direction of the change position and the pressure chamber of the support cylinder device acting in the direction of the release position is connected to the pressure chamber of the Ausschubzylinder adopted acting in the direction of the operating position, a common supply by the hydraulic power source and an automatic actuation of the support means can be achieved in a circuitically simple manner.
  • a switching logic is provided which is designed such that for extending the sliding carriage from the operating position in the Changing position in a first step locking the vehicle body by driving the support device is achieved in a support position and after reaching the support position of the support device in a second step, the extension of the thrust carriage from the operating position to the change position by driving the drive device is achieved and to retract the sliding carriage of the change position to the operating position in a first step, the retraction of the sliding carriage from the change position to the operating position by driving the drive device is achieved and after reaching the operating position of the sliding carriage in a second step unlocking of the vehicle body by a control of the supporting device in a release position is achieved.
  • a switching logic ensures that during extension and retraction of the sliding carriage, the support device is in the support position in which the vehicle body is locked against lateral tilting or tilting, so that a simple and safe change of the
  • the switching logic preferably comprises a switching device which is associated with the pressure chamber of the Ausschubzylinder Vietnamese acting in the direction of the change position and the input side is in communication with the acting in the direction of the support position pressure chamber of the Abstauerzylinder issued.
  • the switching device is provided with a bypass connection, wherein in the bypass connection a blocking valve opening in the outflow direction is arranged.
  • the switching logic comprises a further switching device, by means of the pilot-operated shut-off valve, which is assigned to the force acting in the direction of the support position pressure chamber of Abstützzylinder Vietnamese, can be controlled, the further switching device on the input side with acting in the direction of the operating position pressure chamber Ausschubzylinder observed in Connection stands.
  • the additional switching device controls the connection to the acting in the direction of the release position pressure chamber of Abstützzylinder issued and is provided with a bypass connection, wherein in the bypass connection an opening in the outflow check valve is arranged.
  • the bypass connection allows a simple connection of acting in the direction of the release position pressure chamber of Abstützzylinder observed with a container in the operation of the Abstauerzylinder observed in the support position.
  • the switching logic is designed as a hydraulic valve device, wherein the switching device and / or the further switching device is formed by a respective pressure switching valve, in particular a pressure relief valve.
  • a respective pressure switching valve in particular a pressure relief valve.
  • the switching logic is designed as an electronic control, wherein the switching device and / or the further switching device is formed by an electrically operated control valve with a blocking position and a flow position, wherein the control valves are actuated by the electronic control.
  • electrically operated control valves can also be achieved in a simple manner in conjunction with an electronic control that the extension cylinder of the slide carriage is actuated until the change position after the Abstauerzylinder founded was acted upon in the support position and for retracting the thrust carriage, the AbstNeillzylinder adopted only in the release position is actuated after the Ausschubzylinder immunity has acted on the thrust carriage in the operating position.
  • control valves can in this case be formed by simply constructed switching valves, which are preferably actuated by a spring in the blocking position and by means of an actuating device, such as a solenoid, which is in operative connection with the electronic control device in the flow position.
  • the electronic control is advantageously connected to a sensor device which detects the operating position and the change position and a sensor device which detects the release position and the support position of the support cylinder device.
  • an electronic switching logic can be formed by means of the extension of the thrust carriage the Ausschubzylinder adopted associated control valve is actuated only in the flow position after the sensor device determines the support position of the Abstauerzylinder Vietnamese has and for retracting the AbstauerzylinderINA the Abstützzylinder observed associated control valve is actuated only in the flow position after the sensor device has determined the operating position of the sliding carriage.
  • the force acting in the direction of the support position pressure chamber of the support cylinder device is assigned a Stauerkraftbegrenzungs announced.
  • a Stauerkraftbegrenzungs With such a Stauerbegrenzungs announced can easily be limited to a required value, the support force generated by the Abstauerzylinder founded to avoid overloading the Abstauerzylinder adopted and the vehicle body or the steering axis.
  • the Stützkraftbegrenzungs can be formed according to a preferred embodiment of the invention of a pressure relief valve, in particular a pressure control valve.
  • a pressure control valve can be limited in a simple manner in the acting in the direction of the support position pressure chamber of the support device pressure to achieve a limitation of the supporting force.
  • the Stützkraftbegrenzungs is provided with a bypass connection, wherein in the bypass connection a blocking valve opening in the outflow direction is arranged.
  • a bypass connection With such a bypass connection, the support force limiting device can be bypassed in a simple manner in order to achieve retraction of the supporting cylinder device into the release position.
  • the support device is assigned a release position determining end position monitoring device, which is preferably formed by a release position of the support device detecting sensor device, which is in operative connection with a vehicle control of the truck.
  • a release position of the support device can be determined in a simple manner and a faulty operation can be avoided, in which a driving operation of the truck takes place with the support device located in the support position.
  • the vehicle control is designed in such a way that when the support device is not completely retracted into the release position, the truck is stopped and, if appropriate, a corresponding warning message is issued to the operator, it can be ensured in a simple manner that the industrial truck is only ready to drive when the vehicle is ready Support device is in the release position and thus the sensor device provides a corresponding signal.
  • a control valve device connected to the hydraulic energy source and a container is provided for controlling the Ausschubzylinder observed and the Abstützzylinder observed, which is provided with a Ausschubschaltwolf and a Einfahrschaltwolf.
  • the extension and retraction of the sliding carriage and the automatic actuation of the support cylinder device for locking and unlocking the vehicle body can be controlled in a simple manner and with low construction costs.
  • the control valve device connects in the Ausschubschaltwolf acting in the direction of the support position pressure chamber of Abstützzylinder issued and the switching device with a feed line of the power source and the other switching device and acting in the direction of the operating position pressure chamber Ausschubzylinder observed with a container.
  • control valve device in the Einfahrschalt too connects the further switching device and acting in the direction of the operating position pressure chamber Ausschubzylinder adopted with a feed line of the energy source and the acting in the direction of the support position pressure chamber of the Abstützzylinder stimulate and the switching device connects to a container, is achieved in a simple circuit technology, in that the thrust slide is first retracted into the operating position before the retraction movement of the support cylinder into the release position for unlocking the vehicle body takes place when the further adjuster valve device is activated.
  • the bypass connection to the switching device allows in a simple manner a connection of the pressure chamber acting in the change position of the Ausschubzylinder observed with the container when retracting the sliding carriage.
  • a shut-off valve opening in the direction of the control valve is arranged in the delivery line guided by the energy source to the control valve device. If the control valve device is in the retracted position after the power supply unit has been replaced during normal operation of the truck, a leakage-free shut-off of the pressure space of the supporting cylinder device acting in the direction of the retraction position and of the pressure chamber of the ejecting cylinder device acting in the direction of the operating position can be achieved with such a shut-off valve.
  • An uncontrolled movement of the Abstützzylinder observed in the shut-off and uncontrolled extension of the screed, for example, by external forces such as centrifugal forces during cornering or shocks when driving through bumps, can be avoided in a simple and secure way.
  • the delivery line is associated with a pressure limiting device.
  • a pressure limiting device such as a pressure relief valve, can easily limit and safeguard the maximum supporting force generated by the Abstützzylinder worn in the Support position can be achieved and the entire system to be protected from overload.
  • an existing hydraulic circuit of the truck such as a working hydraulics of the truck
  • the control valve device can in this case be formed by a valve section of a control valve block of the working hydraulics.
  • the hydraulic energy source can be formed by a pressure medium accumulator, which can be loaded during operation of the truck.
  • the power supply unit is designed as a battery block, a change of a discharging battery block can be achieved in a simple manner.
  • the hydraulic energy source is formed by an electric hydraulic compacting unit.
  • Such a hydraulic compacting unit has a low energy consumption, so that a drive of the electric hydraulic compacting unit with the remaining energy present in a discharged battery block when changing the battery pack is made possible.
  • FIG. 1 is an inventive, designed as a counterbalance forklift truck 1 shown in a perspective view.
  • a battery compartment 6 for receiving a power supply device 7 designed, for example, as a battery block is formed in a middle section of a vehicle body 5 of the industrial truck 1 formed by a frame 2, a counterweight 3 and a driver's protective roof 4, a battery compartment 6 for receiving a power supply device 7 designed, for example, as a battery block is formed.
  • the vehicle body 5 is provided with a lateral opening 8, by means of which the energy supply unit 7 can be at least partially moved out of the battery compartment 6 in the lateral and horizontal direction for changing the energy supply unit 7 or moved into the battery compartment 6.
  • a change position is shown, in which the power supply unit 7 is at least partially laterally outside of the battery compartment 6.
  • two wheels 10a, 10b shown, for example, are designed as drive wheels to the rear-side area provided with steered wheels steering axle 11, which is preferably designed as a pendulum axis.
  • the trained as a swing axle steering axle 11 is - as in the FIG. 2 is shown in detail - suspended by means of a preferably centrally arranged in the vehicle longitudinal direction pendulum joint 12 on the vehicle body 5, for example, the counterweight 3, pendulum.
  • a slide carriage 9 is shown, on which the power supply unit 7 stands up.
  • the sliding carriage 9 can be moved out of the battery compartment 6 of the truck 1 in the lateral direction or moved into the battery compartment 6.
  • the sliding carriage 9 is mounted linearly displaceably by means of a guide 13 in the region of the battery compartment 6 on the vehicle body 5 in the transverse direction of the industrial truck 1.
  • the slide carriage 9 is movable by means of a drive device 15 between an operating position in which the slide carriage 9 is located inside the battery compartment 6 and the change position in which the slide carriage 9 is located at least partially outside the battery compartment 6.
  • the drive device 15 is formed by a hydraulic Ausschubzylinder driving 16, which is formed for example by a double-acting cylinder assembly comprising a hydraulic cylinder.
  • the Ausschubzylinder driving 16 has an acting in the direction of the operating position pressure chamber 16a and acting in the direction of the change position pressure chamber 16b.
  • the Ausschubzylinder driving 16 is in this case arranged with a cylinder housing on the vehicle body 5 and is connected to an extendable or retractable piston rod 16c with the thrust slide 9 in operative connection.
  • a support device 20 is provided, which is formed by a hydraulic support cylinder device 21 and locks the vehicle body 5 against lateral tilting.
  • the support cylinder device 21 is in accordance with FIG. 2 formed by a double-acting hydraulic cylinder, which has a force acting in the direction of a support position pressure chamber 21a and acting in the direction of a release position pressure chamber 21 b.
  • the support cylinder device 21 is attached, for example with a cylinder housing on the counterweight 3 or the driver's roof 4 or a frame member or at a arranged in the roof area of the driver's roof 4 tilting a mast on a tilt drive support of the vehicle body and has a retractable or retractable piston rod 21 c, which can be brought into connection with the steering axle 11.
  • a corresponding support leg 22 may be arranged on the piston rod 21 c in this case a corresponding support leg 22 may be arranged.
  • the support cylinder 21 is in this case arranged such that the piston rod 21 c engages the steering axle 11 in the vehicle transverse direction to the pendulum joint 12 spaced on the provided with the side opening 8 vehicle side to block the pendulum movement of the steering axle 11, the vehicle body 5 when changing the Power supply unit 7 to lock against lateral tilting. It is alternatively possible, for example, to fix the supporting cylinder device 21 with a cylinder housing on the steering axle 11, so that the retractable or retractable piston rod 21 c can be brought into connection with the counterweight 3 or the driver's protection roof 4.
  • the connecting line 37a connected to a connection B of the control valve device 35 is connected here to the pressure chamber 16a of the Ausschubzylinder adopted 16 acting in the direction of the operating position and to the pressure chamber 21b of the supporting cylinder device 21 acting in the direction of the release position.
  • the acting in the direction of the release position pressure chamber 21 b of the support cylinder device 21 is thus in communication with the acting in the direction of the operating position pressure chamber 16a of Ausschubzylinder learned 16.
  • the connecting line 37b connected to a connection A of the control valve device 35 is connected to the pressure chamber 16b of the Ausschubzylinder adopted 16 acting in the direction of the change position and to the pressure space of the support cylinder device 21 acting in the direction of the support position 21a.
  • the force acting in the direction of the support position pressure chamber 21 a of the support cylinder 21 is thus connected to the force acting in the direction of the change position pressure chamber 16 b of the Ausschubzylinder sexual 16 in combination.
  • the control valve device 35 is designed as a switching valve and has a retraction switching position 35a in which the connecting line 37a and the connecting line 38a is connected to the delivery line 34 of the pump 32 and the connecting line 37b and the connecting line 38b is connected to the container line 36.
  • the connecting line 37b and the connecting line 38b is connected to the delivery line 34 and the connecting line 37a and the connecting line 38a connected to the container line 36.
  • the control valve device 35 is of a electrically actuated switching valve formed, which is acted upon by means of a spring in the retraction 35a and can be acted upon by a trained as a solenoid actuator in the Ausschubschalt ein 35b.
  • shut-off valve 39 which opens in the direction of the control valve device 35 and which is formed by a check valve which opens in the direction of the control valve device 35, is furthermore arranged.
  • the delivery line 34 is associated with a pressure limiting device 40, which is formed by a pressure relief valve.
  • a switching logic 50 which includes a switching device 51, which is assigned to the acting in the direction of change position pressure chamber 16b of the Ausschubzylinder sexual 16.
  • the switch-on device 51 is arranged between the connection point C and the pressure chamber 16b of the Ausschubzylinder adopted 16 in the connecting line 37b and thus is on the input side with the force acting in the direction of the support position pressure chamber 21 a of the support cylinder 21 in conjunction.
  • the switching device 51 is formed by a pressure switching valve 52, which is formed in the illustrated embodiment of a pressure relief valve.
  • the pressure switching valve 51 is acted upon by a spring 53 in a switch position blocking the connecting line 37b.
  • the pressure-adjusting valve 52 can be acted upon by the pressure present at the connection point C and thus in the pressure space 21a of the supporting cylinder device 21.
  • a corresponding control line 54 is provided.
  • the switch-on device 51 is furthermore provided with a bypass connection 55 which bypasses the pressure switch valve 52 and in which a check valve 56 opening in the outflow direction is arranged.
  • the check valve 56 is formed in the illustrated embodiment by a spring-loaded check valve which opens in the direction of the connection point C.
  • the switching logic 50 further comprises a further switching device 61, which is assigned to the force acting in the direction of the retraction position pressure chamber 21 b of the support cylinder 21.
  • the further switching device 61 is disposed between the connection point D and the pressure chamber 21 b in the connecting line 38 a and thus is on the input side with the in Direction of the operating position acting pressure chamber 16a of Ausschubzylinder learned 16 in conjunction.
  • the switching device 61 is formed by a pressure switching valve 62, which is formed in the illustrated embodiment of a pressure relief valve.
  • the pressure switching valve 62 is acted upon by a spring 63 in a switching position blocking the connecting line 38a. In the direction of a switching position releasing the connecting line 38a, the pressure switching valve 62 can be acted upon by the pressure present at the connection point D and thus in the pressure chamber 16a of the ejection cylinder device 16.
  • a corresponding control line 64 is provided.
  • the switch-on device 61 is furthermore provided with a bypass connection 65 which bypasses the pressure switch valve 62 and in which a shut-off valve 66 which opens in the outflow direction is arranged.
  • the check valve 66 is formed in the illustrated embodiment of a spring-loaded check valve, which opens in the direction of the connection point D.
  • check valve 70 In the force acting in the direction of the support position pressure chamber 21a of the support cylinder device 21 connecting line 38b a als mortbares check valve 70 is arranged, which blocks the pressure chamber 21 a in the outflow and can be controlled by a pilot control device in a flow position.
  • the check valve 70 is preferably formed by a in the direction of the pressure chamber 21 a opening check valve, which can be controlled by means of a pending in a pilot line 71 control pressure in a flow position.
  • the check valve 70 is vorsteubar by means of the further switching device 61, wherein the pilot line 71 is connected to a connection point E of the connecting line 38 a between the pressure chamber 21 b and the other switching device 61.
  • the extension device 15 with the automatically actuated support device 20 for changing the power supply unit 7 according to the FIG. 2 works as follows.
  • the control valve device 35 of the hydraulic compacting unit 30 is energized and thus acted upon in the Ausschubschaltrium 35b. Subsequently, the electric motor 31 is driven and thus energized, whereby the pump 32 is driven. This sucks pressure medium from the container 33 via the suction filter or the suction strainer and promotes pressure medium via the opened shut-off valve 39 and operated in the Ausschub ein 35b control valve device 35 in the connecting line 37b. Of the System pressure is secured via the pressure relief valve 40.
  • the pressure switching valve 52 of the switching device 51 is in the blocking position, so that the connection to the pressure chamber 16 b of Ausschubzylinder adopted 16 via the pressure switching valve 52 and the check valve 56 of the bypass connection 55 is shut off.
  • the pumped by the pump 32 pressure fluid thus flows at the connection point C in the connecting line 38b and the opening in the inflow direction check valve 70 in the direction of the support position acting pressure chamber 21a of the support cylinder 21st
  • the piston rod 21c is in the FIG. 2 acted upon below.
  • the pressure fluid flows from the force acting in the direction of the retracted position pressure chamber 21 b of the support cylinder 21 via the bypass connection 65 and the opened check valve 66 of the other switching device 61 in the connecting line 38a and the connection point D in the connecting line 37a, via the in the Ausschubschalt ein 35b actuated control valve means 35 to the container line 36 and thus the container 33 is connected.
  • the support cylinder 21 is in this case actuated in the support position until the piston rod 21c touches the support leg 22 on the oscillating steering axle 11 and blocks a pendulum of the steering axle 11.
  • the releasable check valve 70 prevents a flow of pressure medium from the support cylinder device 21 in the connecting line 37 b, whereby the blocking of the steering axle 11 and thus the locking of the vehicle body 5 is maintained.
  • the pressure medium flow of the pump 32 now flows into the pressure chamber 16 b of Ausschubzylinder owned 16 and pushes the piston rod 16 c, which is connected to the thrust slide 9, in the FIG. 2 right into the change position.
  • the slide carriage 9 is here stored and guided in the guides 13.
  • the pressure chamber 16a of Ausschubzylinder immunity 16 is connected to the container 33.
  • a pressure medium flow from the connection point D via the connecting line 38 a into the supporting cylinder device 21 is prevented by the pressure switching valve 62 and the check valve 66 in the bypass line 65.
  • the electric motor 31 and then the control valve device 35 is de-energized.
  • the control valve device 35 is acted upon by the spring in the Einfahrschaltwolf 35a.
  • the pressure in the connection line 37b drops to the tank pressure level.
  • the pressure switching valve 52 is thereby acted upon by the spring 53 in the blocking position.
  • the unlockable check valve 70 is in the locked position and maintains the pressure in the pressure chamber 21 a of the support cylinder 21 upright. A back flow of the pressure medium from the connecting line 37 a in the pump 32 is prevented by the check valve 39.
  • the power supply unit 7 can be changed in this state.
  • the electric motor 31 is energized, the control valve device 35 remains energized and is in the retraction position 35a.
  • the pump 32 conveys pressure fluid via the connecting line 37a in the direction of the retraction position acting pressure chamber 16a of the Ausfahrzylinder gifted 16.
  • the additional switching device 61 with the pressure switch valve 62 in the blocking position and the check valve 66 in the bypass connection 65 prevents in this situation that pressure means of Connection point D in the direction of the release position acting pressure chamber 21 b of the support cylinder 21 flows.
  • Pressure fluid from the pressure chamber 16b of the Ausschubzylinder Vietnamese 16 can flow via the connecting line 37b, the piloted check valve 56 in the bypass line 55 to the befindlichem in the retraction 35a control valve means 35 and thus via the container line 36 into the container 33.
  • the higher pressure level in the pressure chamber 21a of the support cylinder device 21 in this case holds the unlockable check valve 70 in the blocking position, so that via the connection point C no pressure medium in the pressure chamber 21 a of the support cylinder 21 can flow.
  • FIG. 3 is the force acting in the direction of the support position pressure chamber 21 a of the support cylinder 20 a Stauerkraftbegrenzungs worn 80 assigned.
  • the Stauerkraftbegrenzungs prepared 80 is formed by a pressure-closing valve 81, which is formed in the illustrated embodiment of a pressure control valve.
  • the pressure closing valve 81 is acted upon by a spring 82 in a switching position releasing the connecting line 38b.
  • the pressure-closing valve 81 is of the pressure in the pressure chamber 21 a of the support cylinder 21 acted upon.
  • a corresponding control line 83 is provided.
  • the support force limiting device 80 arranged in the connecting line 38b is furthermore provided with a bypass connection 85 which bypasses the pressure-closing valve 81 and in which a check valve 86 which opens in the outflow direction is arranged.
  • the check valve 86 is formed in the illustrated embodiment by a spring-loaded check valve which opens in the direction of the connection point C.
  • FIG. 3 increases during the Abstützvorgangs after completing the extension movement of the piston rod 21 c of the support cylinder 21, the pressure in the connecting line 38b and thus in the pressure chamber 21 a until the pressure closing valve 81 via the control line 83 against the force of the spring 82 in the locked position is acted upon and shuts off the connection to the pressure chamber 21 a.
  • the maximum supporting force of the supporting cylinder device 21 can thus be limited to a desired value with the aid of the pressure-closing valve 81 and the spring 82.
  • an additional end position monitoring 90 is provided for the release position of the support device 20.
  • the end position monitoring 90 comprises a sensor device 91, for example a switch or a suitable sensor, which detects and monitors the upper end position of the supporting cylinder device 21.
  • the sensor device 91 is in operative connection with a vehicle control 92.
  • the truck 1 can be stopped when not fully retracted piston rod 21 c of the support cylinder device 21 and thus not in the release position befindaji support device 20 and / or will issue a warning message to avoid operation of the truck 1 when the steering axle 11 is blocked.
  • the support cylinder device 21 is designed as a single-acting hydraulic cylinder which has a pressure chamber 21 a acting in the direction of a support position and can be acted upon by means of a spring device 25 in the release position.
  • the additional switching device 61 is the output side to the pilot line 71 of the check valve 70 and serves to open the check valve 70 to the connection of the pressure chamber 21 a with the container 33 by the spring means 25, an actuation of the piston rod 21 c of the support cylinder device 21 in the release position achieve.
  • Both FIGS. 2 to 5 is the switching logic as a hydraulic switching logic with hydraulic valve devices formed, which is formed by the switching device 55 as a pressure-switching valve 52 with the bypass connection 51 and the pressure-switching valve 62 with the bypass connection 65 existing additional switching device 61.
  • the switching logic 50 is formed by an electronic control 100, wherein the switching device 51 is formed in the connecting line 37b by a controllable by the electronic control 100 control valve 101 and the further switching device 61 by a controllable by the electronic control 100 control valve 111.
  • the control valves 101, 111 are designed as switching valves and each have a blocking position 101 a, 111 a and a flow position 101 b, 111 b.
  • the control valves 101, 111 are each by means of a spring 102, 112 in the blocking position 101 a, 111 a and by means of an electrical actuator 103, 113, for example, a solenoid, which communicate with the electronic control 100 in the flow position 101 b, 111 b acted upon.
  • the blocking position 101 a, 111 a of the control valves 101, 111 is in each case provided with a bypass connection 105, 115, wherein an opening in the outflow direction check valve 106, 116, for example, a check valve, in the blocking position 101 a, 111 a is provided.
  • the check valve 106 of the control valve 101 opens in this case Direction to the connection point C. Accordingly, the check valve 116 of the control valve 111 opens to the connection point D.
  • the switching logic 50 of the FIG. 6 furthermore comprises a sensor device 120, which is in communication with the electronic control 100 and with which the operating position and the change position of the ejection cylinder device 16 and thus of the sliding carriage 9 can be detected.
  • the sensor device 120 comprises a switch or a sensor 120a for detecting the operating position and a switch or a sensor 120b for detecting the change position.
  • a corresponding switching lug 121 is arranged on the piston rod 16c of the ejection cylinder device 16 or on the push carriage 9.
  • the switching logic 50 comprises a sensor device 125 in communication with the electronic control 100, with which the support position and the release position of the support device 20 can be detected.
  • the sensor device 125 comprises a switch or a sensor 125a for detecting the release position and a switch or a sensor 125b for detecting the supporting position of the supporting cylinder device 21.
  • a switch or a sensor 125b for detecting the supporting position of the supporting cylinder device 21.
  • a corresponding switching lug is provided on the piston rod 21c of the supporting cylinder device 21 126 arranged.
  • the extension device 15 with the automatically actuated support device 20 for changing the power supply unit 7 according to the FIG. 6 works as follows.
  • the control valve device 35 of the hydraulic compacting unit 30 is driven and acted upon in the Ausschubschaltrium 35b. Subsequently, the electric motor 31 is energized and drives the pump 32 at. This pump 32 sucks pressure medium from the container 33 via a suction filter or suction strainer and conveys via the shut-off valve 39 and operated in the Ausschubschaltwolf 35b control valve device 35 in the connecting line 37b. The system pressure is secured via the pressure relief valve 40.
  • the switching valve 101 is de-energized and is in the blocking position 101 a and blocks the connection to the force acting in the direction of Ausschub ein pressure chamber 16 b of Ausschubzylinder observed 16 from.
  • connection line 37a is connected to the container 33 via the container line 36 when the control valve device 35 is in the Ausschubschaltwolf 35b.
  • the piston rod 21 c is extended so long in the support position until the support leg 22 touches down on the oscillating steering axle 11 and blocks a pendulum of the steering axle 11. As a result, the tilting line of the truck moves outward to prevent tilting or tilting when the power supply unit is extended.
  • the switching lug 126 arranged on the piston rod 21c actuates the sensor 125b.
  • the controller 100 energizes the actuator 103 of the control valve 101, whereby the control valve 101 is acted upon in flow position 101 b and opens the connecting line 37 b.
  • the pilot-operated check valve 70 prevents a flow of pressure medium from the support cylinder device 21 into the connection line 37b, whereby the blocking of the steering axle 11 is maintained.
  • the controller 100 is designed in such a way that, in the case of such a signal of the sensor 120a, no activation of the actuating device 113 of the control valve 111 takes place during the ejection process. If the Ausschubzylinder worn 16 in the change position, the switching flag 121 activates the sensor 120b, whereby the control of the control valve 101 is terminated and the switching valve 101 is acted upon by the spring 102 in the blocking position 101 a. Subsequently, the electric motor 31 and then the control valve device 35 is de-energized. The control valve device 35 is thus acted upon by the spring in the insertion switching position 35a. As a result, the pressure in connection line 37b drops to the tank pressure level.
  • the releasable check valve 70 keeps the pressure continues in the pressure chamber 21 a of the support cylinder device 21. A backflow of the pressure medium from the connecting line 37 a in the hydraulic pump 32 is prevented by the check valve 39.
  • the power supply unit 7 can be changed in this state.
  • the control valve means 35 For retracting the power supply unit in the operating position of the electric motor 31 is energized, the control valve means 35 remains energized and in the insertion switching position 35a.
  • the control valve 111 is not controlled and is in the blocking position 111 a, in which prevents pressure medium from the connection point D in the pressure chamber 21 b of the support cylinder 21 to flow can.
  • the pressure fluid from the pressure chamber 16b of Ausschubzylinder worn 16 flows through the connecting line 37b, the check valve 106 of the non-driven and in the blocking position 101 a control valve 101 to the control valve means 35 and thus via the container line 36 into the container 33.
  • the switching flag 121 activates the sensor 120a.
  • the controller 100 then energizes the actuator 113 of the control valve 111, whereby this is acted upon in the flow position 111b.
  • the switching flag 126 activates the sensor 125a.
  • the controller 100 stops the control of the control valve 113.
  • the electric motor 31 can be switched de-energized. A sagging of the piston rod 21 c of the supporting cylinder device 21 or an extension of the sliding carriage 9 by external forces (for example, impacts or centrifugal forces) is prevented by the shut-off valve 39.
  • the sensor device 120 or 125 may also be formed by one or more pressure sensors, with which the pressure in the pressure chambers 21 a and 21 b for determining support position or retraction position or the pressure can be determined in the pressure chambers 16a and 16b for determining the operating position or the change position.
  • the truck 1 allows a simple and safe change of the power supply unit 7, which can be done regardless of the nature of the road surface by the support of the vehicle body 5 relative to the pendulum suspended steering axle 11 and the support 20 can be used with low construction costs for high weights of power supply units 7.
  • the embodiment of the FIG. 6 with an electronic switching logic 50 can also be provided with a single-acting hydraulic cylinder as Abstauerzylinder Published 21 or additionally with the Stauerkraftbegrenzungs Rhein 80.
  • a single-acting hydraulic cylinder as Abstützzylinder Published 21 or additionally with the Stauerkraftbegrenzungs Rhein 80.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP20110004516 2010-06-04 2011-06-01 Chariot de manutention Active EP2392540B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201010022754 DE102010022754A1 (de) 2010-06-04 2010-06-04 Flurfördezeug

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EP2392540A1 true EP2392540A1 (fr) 2011-12-07
EP2392540B1 EP2392540B1 (fr) 2013-03-06

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DE (1) DE102010022754A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012104586A1 (de) 2012-05-29 2013-12-05 Linde Material Handling Gmbh Flurförderzeug
DE102015200388A1 (de) * 2015-01-14 2016-07-14 Robert Bosch Gmbh Batteriewechselvorrichtung für ein elektrisch antreibbares Fahrzeug

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11201007A (ja) * 1998-01-12 1999-07-27 Toyota Autom Loom Works Ltd 産業用エンジン車両におけるバッテリ電圧異常検出方法及びバッテリ電圧異常検出装置
DE10347065A1 (de) 2003-10-09 2005-05-12 Linde Ag Flurförderzeug mit einem seitlich entnehmbaren Batterieblock
DE102005008061A1 (de) * 2005-02-22 2006-08-24 Still Gmbh Flurförderzeug mit einer neigbaren Batterieaufstandsfläche
EP1935731A2 (fr) * 2006-12-22 2008-06-25 Still Gmbh Empileuse à fourche dotée d'un guidage destiné au retrait latéral des batteries
DE102008032305A1 (de) 2008-07-09 2010-01-14 Linde Material Handling Gmbh Flurförderzeug
DE102009049498A1 (de) * 2009-10-15 2011-04-21 Linde Material Handling Gmbh Flurförderzeug mit einer seitlich entnehmbaren Energieversorgungseinheit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11201007A (ja) * 1998-01-12 1999-07-27 Toyota Autom Loom Works Ltd 産業用エンジン車両におけるバッテリ電圧異常検出方法及びバッテリ電圧異常検出装置
DE10347065A1 (de) 2003-10-09 2005-05-12 Linde Ag Flurförderzeug mit einem seitlich entnehmbaren Batterieblock
DE102005008061A1 (de) * 2005-02-22 2006-08-24 Still Gmbh Flurförderzeug mit einer neigbaren Batterieaufstandsfläche
EP1935731A2 (fr) * 2006-12-22 2008-06-25 Still Gmbh Empileuse à fourche dotée d'un guidage destiné au retrait latéral des batteries
DE102008032305A1 (de) 2008-07-09 2010-01-14 Linde Material Handling Gmbh Flurförderzeug
DE102009049498A1 (de) * 2009-10-15 2011-04-21 Linde Material Handling Gmbh Flurförderzeug mit einer seitlich entnehmbaren Energieversorgungseinheit

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EP2392540B1 (fr) 2013-03-06

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