CN103303845A - Lifting device of ground conveying machine - Google Patents
Lifting device of ground conveying machine Download PDFInfo
- Publication number
- CN103303845A CN103303845A CN2013100699543A CN201310069954A CN103303845A CN 103303845 A CN103303845 A CN 103303845A CN 2013100699543 A CN2013100699543 A CN 2013100699543A CN 201310069954 A CN201310069954 A CN 201310069954A CN 103303845 A CN103303845 A CN 103303845A
- Authority
- CN
- China
- Prior art keywords
- load receiving
- receiving device
- control
- electronic control
- descending speed
- 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.)
- Pending
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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
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- 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
- B66F9/0755—Position control; Position detectors
-
- 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
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
Abstract
A lifting device of a ground conveying machine comprises a load receiving device arranged on an elevating rack in a liftable manner, a hydraulic elevating cylinder for lifting the load receiving device, a control valve for operating the load receiving device, and a sensor for determining the descending speed of the load receiving device, wherein the sensor is connected with en electronic control device. The maximum descending speed of the load receiving device allowed is stored in the control device. During a descending process, the electronic control device discharges pressure medium from the elevating cylinder to controllable valve for controlling a container. The electronic control device is formed such that the descending speed determined by the sensor forms the adjusting parameter for controlling the valve device to a lowered position. In the lowered position, the elevating cylinder is connected with the container to achieve maximum permissible descending speed independent of structural boundary conditions and operation conditions, especially load and/or temperature and/or viscosity of pressure medium received by the load receiving device.
Description
Technical field
The present invention relates to the jacking system of ground conveying machine, has a load receiving device that can rise and can be arranged on with descending on the crane, wherein, for described load receiving device being risen and descending, a hydraulic up-down cylinder assembly is set, and this lift cylinders device can be handled by means of the control cock device.
Background technology
In order to carry load, ground conveying machine is provided with the load receiving device, and described load receiving device can consist of at lift slide and suspension type equipment that is fixed on this lift slide of lifting on the crane by one usually.The load that described suspension type equipment for example can be configured to be made of prong is pitched, and can hold up load, for example shelf by means of described load fork.
In the load receiving device can the ground conveying machine by means of the lifting of hydraulic up-down cylinder assembly, the control cock device had been determined the descending speed of this load receiving device in the operating deflection that descends.The limit of the descending speed that for security reasons, allows for the maximum of load receiving device is stipulated legally.The descending speed that allows in order to observe this maximum, in the jacking system of described type, the control cock device is so designed, so that maximum pressure medium discharge current is flowed out towards container from the lift cylinders device, described container is guaranteed observing of the maximum descending speed that allows.For this reason, the control cock device is typically provided with decline brake activation valve or discharge current adjuster.
But the pressure medium discharge current that flows out from the lift cylinders device towards container when control cock is manipulated in the lowering position fully depends on the specific parameter that affects.The embodiment of this hydraulic efficiency pressure system that affects the Boundary Conditions in Structures that parameter is crane (for example structure type of crane and system height) and be used for the lift cylinders device is supplied.The structure type of crane should be understood to crane at the embodiment of extensible push rod quantitative aspects, and for example crane is as the embodiment of Double layer Bar or three layers of bar.Each crane-structure type obtains different system heights usually for the different adjustable heights of load receiving device.In addition, in the situation of the multistage lifting frame with a plurality of different lift cylinders, the pressure medium discharge current depends on the cross-sectional plane as Boundary Conditions in Structures of corresponding lift cylinders.The deadweight of crane consists of the other Boundary Conditions in Structures of pressure medium discharge current.Descending in servicely, pressure medium discharge current other affects parameter and is made of the condition of service of appearance when ground conveying machine move, thereby particularly is made of the viscosity of pressure medium and its temperature and received load.
The discharge current adjuster of common described decline brake activation valve or described control cock device designs like this, so that can cover a plurality of flexible programs and the structure type of crane by an embodiment of decline brake activation valve or discharge current adjuster, so that the variation of control cock device is less.Thus, the design consideration crane of decline brake activation valve or discharge current adjuster carries out with the highest descending speed.In the situation of in other crane, using decline brake activation valve or discharge current adjuster, realize the reduction of maximum falling speed.
adversely occur simultaneously affect parameter, for example temperature is lower and the pressure medium of corresponding thickness and/or in the situation that the operation that descends when not receiving load, adjust the maximum falling speed of load receiving device in the decline process when the control cock device is manipulated in the lowering position fully, it significantly is lower than the limit of the maximum descending speed that allows.But when adopting described ground conveying machine, the maximum falling speed that significantly is lower than the limit of the maximum descending speed that allows then causes postponing when Transhipment Cargo.Can realize thus the transport efficacy of the corresponding reduction of ground conveying machine, this causes the cost of every single Transhipment Cargo amount to increase.
Summary of the invention
Task of the present invention is, a kind of jacking system of described type is provided, and utilizes described jacking system irrespectively to realize the maximum descending speed that allows the decline of load receiving device is in service with Boundary Conditions in Structures and condition of service.
According to the present invention, described task solves in the following manner, namely, a sensor device that is used for the descending speed of definite described load receiving device is set, described sensor device is connected with an electronic control package, in this electronic control package, deposit the limit of the descending speed that the maximum of described load receiving device allows, and one of described electronic control package control descend in service with the pressure medium discharge current from the lift cylinders device to a container control, but the valve gear of electric control, wherein, described electronic control package consists of like this, so that during the decline process, the descending speed of determining by means of described sensor device is configured for can controlling to an adjustment parameter in the lowering position by electrically-energized valve gear with described, in described lowering position, described lift cylinders device is connected with described container, so as with boundary condition and the condition of service of configuration aspects, the load and/or the temperature of pressure medium and/or the descending speed that viscosity irrespectively realizes described maximum permission that particularly utilize the load receiving device to receive.Thus, a sensor device arranged according to the present invention can be at the decline of the described load receiving device descending speed of determining described load receiving device in an electronic control package in service by means of described sensor device.The descending speed of trying to achieve is to adjust parameter, according to described adjustment parameter at the pressure medium discharge current that can electrically-energized valve gear adjustment be flowed out from the lift cylinders device to container by the electronic control package utilization in service that descends.Allow thus and the Boundary Conditions in Structures of crane and the descending speed that condition of service irrespectively allows in the described maximum of the decline of described load receiving device realization in service.The raising of the transport efficacy by having realized ground conveying machine via the descending speed of can electrically-energized valve gear adjusting described load receiving device according to the present invention and realized the cost of the cargo quantity of every single transhipment.
According to a configuration of the present invention, described can electrically-energized valve gear by be configured to can electrically-energized control cock the control cock device consist of, described control cock device has a lowering position and is connected a rest position and can be by means of the directional control of an electric actuation that is connected with described electronic control package towards described lowering position.Described can electrically-energized control cock device can comprise separately, be used for the control cock that makes the load receiving device rise and descend, these control cock are connected with described electronic control package in order to handle, wherein, utilize described control cock for descending to realize the described maximum descending speed that allows in simple mode by the control according to the load receiving device descending speed adjustment of trying to achieve.
According to a preferred configuration of the present invention, described can electrically-energized valve gear by be configured to can electrically-energized control cock the control cock device consist of, described control cock device have a hoisting position, lowering position and is connected a rest position that is configured to center position and can by means of an electric actuation that is connected with described electronic control package towards the directional control of described lowering position and can by means of one with the directional control of described electronic control package electric actuation that be connected, other towards described hoisting position.Utilize this for example be configured to the change-over valve of midway location throttling can electrically-energized control cock can with simple mode by correspondingly, according to the load receiving device descending speed adjustment of being tried to achieve control to and realize the described maximum descending speed that allows in the lowering position.
According to an embodiment of the invention, described can electrically-energized valve gear be arranged on one can be by means of in the decline branch of described control cock device control and can be by means of an electric actuation manipulation that is connected with described electronic control package to described container by described lift cylinders device.Utilize this be in the decline branch can electrically-energized valve gear, for example flow regulating valve structure can realize the described maximum descending speed that allows by control corresponding, that adjust according to the load receiving device descending speed of being tried to achieve in simple mode equally.This can the permission to realize the described maximum descending speed that allows in simple mode in conjunction with manual or motoroperated control cock for the control lifting process by electrically-energized valve gear.Describedly can in decline branch, be arranged on upstream or the downstream of described control cock at this by electrically-energized valve gear.
According to a configuration of the present invention, the flow counter described sensor device is configured to from described lift cylinders device towards the decline branch of described container.Utilize this flow counter can in described electronic control package, calculate in simple mode the descending speed of load receiving device.
According to a preferred configuration of the present invention, described sensor device is configured to the adjustable height sensor of described load receiving device, wherein, in described electronic control package by the descending speed of the described load receiving device of adjustable height calculated signals of described adjustable height sensor.Utilize this adjustable height sensor that for example is configured to linear transducer can measure the load receiving device with respect to the track or with respect to the distance of ground conveying machine.In described electronic control package, can be calculated by the length signals of described adjustable height sensor the descending speed of load receiving device by time derivative in simple mode.
If described sensor device is configured to the linear transducer of restricting, described rope linear transducer is arranged on the crane of described ground conveying machine or the car body and has a rope device that is connected with described load receiving device, is then obtaining advantage aspect little the expending.Utilize this adjustable height sensor to measure with respect to the adjustable height of the car body of ground conveying machine and in described electronic control package, calculated the descending speed of load receiving device by the adjustable height signal in simple mode.
Description of drawings
Describe other advantage of the present invention and details in detail by means of the embodiment shown in the schematic figures.
The schematic structure of the jacking system of the present invention 1 of a ground conveying machine that is not shown specifically shown in the accompanying drawing.
The specific embodiment
In order to make load receiving device 3 rise and descend, a hydraulic up-down cylinder assembly 11 is set.Described lift cylinders device 11 is connected with draw gear 6, for example lifting chain of flexibility with being connected for described load receiving device 3 is risen, and described draw gear utilizes first end to be fixed on the described lift slide 4.Described draw gear 6 is by wheel flutter 7 guiding and utilize the second end to be fixed on the car body of crane 2 or ground conveying machine.In an illustrated embodiment, wheel flutter 7 be arranged on lift cylinders extensible of described hydraulic up-down cylinder assembly 11 and the piston rod 10 that can move on.
Control cock device 12 can be handled by electricity.For this reason, an electric actuation 20 is set, when triggering described operating control, control cock device 12 is by the directional control towards decline position 13c.Can be with the directional control of control cock device 12 towards hoisting position 13b by means of an other electric actuation 21.These operating controls 20,21 for example are configured to magnet, particularly proportion electro-magnet.
For control cock device 12 is controlled among hoisting position 13b or the lowering position 13c, an electronic control package 25 is set, described electronic control package is connected with described operating control 20,21.
By means of by two springs 26,27 spring installations that consist of can with control cock device 12 be not triggered and currentless state in be manipulated among the rest position 13a that is configured to center position.
Control cock device 12 with control cock 13 towards the electric actuation 20 of the directional control of decline position 13c combine consist of decline at load receiving device 3 in service with 16 controls from lift cylinders device 11 towards container of pressure medium output stream, can electrically-energized valve gear 40, described valve gear can and be handled by means of electronic control package 25 controls.
According to the present invention, a sensor device 30 that is used for the descending speed of definite described load receiving device 3 is set, described sensor device is connected with described electronic control package 25.
In an illustrated embodiment, sensor device 30 is configured to adjustable height sensor 31, utilizes it can measure the adjustable height of described load receiving device 3.Described adjustable height sensor 31 is configured to the linear transducer 32 of restricting in an illustrated embodiment, described rope linear transducer comprise one and be fixed on the crane 2 on the car body of (for example on the car body that is fixed on ground conveying machine of ground conveying machine and not the column of liftable) or ground conveying machine housing with is connected a rope device 33 that is connected with described load receiving device 3.
According to the length signals that is provided by described adjustable height sensor 31, in described electronic control package 25, calculate the descending speed of described load receiving device 3 by time derivative.
In described electronic control package 25, deposit and store the limit of the descending speed that allows for the maximum of described load receiving device 3.
In the decline process (wherein, being maneuvered among the lowering position 13c by the triggering of described electronic control package 25 by described operating control 20 in the situation that correspondingly handle described executive component 28 described control cock devices 12), by the descending speed of described electronic control package 25 by means of the described load receiving device 3 of described adjustable height sensor 31 calculating.
The descending speeds of determining by means of sensor device 30 of described load receiving device 3 consist of adjusts parameter, will be from lift cylinders device 11 to container 16 adjusts among the lowering position 13c on the descending speed that provides in advance on the described operating element 28 by control cock device 13 is correspondingly controlled at the pressure medium discharge current that flows out pressure medium pipeline 18 in service that descends according to described adjustment parameter.
At this, at the triggering permission through adjusting of the decline of described load receiving device 3 described control cock device 13 in service and Boundary Conditions in Structures and condition of service irrespectively, particularly irrespectively and with the structure type of crane 2 and the embodiment of system height and lift cylinders device 11 irrespectively utilize control cock device 13 in the situation that executive component 28 is manipulated to the descending speed of realizing maximum permission among the lowering position 13c fully with the load of utilizing load receiving device 3 to receive and/or with temperature or the viscosity of pressure medium.
Thus, thereby for a plurality of flexible programs of crane and different Boundary Conditions in Structures and the condition of service (for example load and pressure medium temperature) of change, in the situation that need not bothersomely adaptive decline brake activation valve or discharge current adjuster and adaptive control cock device 12 authorized load receiving devices 3 descend with the descending speed that maximum allows need not structurally thus.
Control the cost that the valve gear 40 that is made of control cock 13 can improve the transport efficacy of the ground conveying machine that is provided with jacking system 11 of the present invention and reduce every single cargo quantity of transhipment by descending speed and adjustment ground that the maximum that realizes described load receiving device 3 allows.
The invention is not restricted to the shown embodiment of control cock device 12.Replace handling described control cock device 12 ground by operating control 20,21 direct electricity, described control cock device 12 also can be by electronics-hydraulically manipulation, wherein, operating control 20,21 handle can be automatically controlled precontrol valve, utilize described precontrol valve to produce control cock device 12 be manipulated to control presssure among lowering position 13c or the hoisting position 13b.
In addition, can realize having the structure of the control cock device 12 of separated, as to be used for rising operation and the operation that descends control cock, in the situation that this structure carries out the control through adjusting of control cock for the operation that descends.
The embodiment that is made of the control cock 13 of control cock device 12 for valve gear 40 alternatively, the pressure medium discharge current can utilize one can electrically-energized valve gear, for example can electrically-energized apportioning valve adjustment, the latter be additional to a control cock setting and be arranged on from lift cylinders device 11 to container 16 can the decline branch by means of this control cock control.Utilize this can in conjunction with the control cock device of manual control descending speed being adjusted on the maximum descending speed that allows in simple mode by electrically-energized valve gear.
Claims (7)
1. the jacking system of ground conveying machine (1), has a load receiving device (3) that can rise and can be arranged on with descending on the crane (2), wherein, for described load receiving device (3) being risen and descending, a hydraulic up-down cylinder assembly (11) is set, this lift cylinders device can be handled by means of control cock device (12), it is characterized in that, a sensor device (30) that is used for the descending speed of definite described load receiving device (3) is set, described sensor device is connected with an electronic control package (25), in this electronic control package, deposit the limit of the descending speed that the maximum of described load receiving device (3) allows, and one of described electronic control package (25) control is in servicely controlled the pressure medium discharge current descending from lift cylinders device (11) to a container (16), but the valve gear of electric control (40), wherein, described electronic control package (25) consists of like this, so that during the decline process, the descending speed of determining by means of described sensor device (30) is configured for the adjustment parameter that can electrically-energized valve gear (40) controls in the lowering position (13c) described, in described lowering position, described lift cylinders device (11) is connected with described container (16), so as with boundary condition and the condition of service of configuration aspects, the load and/or the temperature of pressure medium and/or the descending speed that viscosity irrespectively realizes described maximum permission that particularly utilize load receiving device (3) to receive.
2. according to claim 1 jacking system, it is characterized in that, described can electrically-energized valve gear (40) by be configured to can electrically-energized control cock (13) control cock device (12) consist of, described control cock device has a lowering position (13c) and is connected a rest position (13a) and can be by means of the directional control of an electric actuation (20) that is connected with described electronic control package (23) towards described lowering position (13c).
3. according to claim 1 jacking system, it is characterized in that, described can electrically-energized valve gear (40) by be configured to can electrically-energized control cock (13) control cock device (12) consist of, described control cock device has a hoisting position (13b), a lowering position (13c) with is connected a rest position that is configured to center position (13a) and can be by means of an electric actuation that is connected with described electronic control package (20) towards the directional control of described lowering position (13c) and can be other by means of, the operating control (21) that is connected with described electronic control package is towards the directional control of described hoisting position (13b).
4. according to claim 1 jacking system, it is characterized in that, described can electrically-energized valve gear (40) be arranged on one can be by means of the decline branch of described control cock device (12) control and can be by means of an electric actuation manipulation that is connected with described electronic control package (25) from described lift cylinders device (11) to described container (16).
5. each jacking system in 4 according to claim 1 is characterized in that, described sensor device (30) is configured to lead to flow counter the decline branch of described container (16) from described lift cylinders device (11).
6. each jacking system in 4 according to claim 1, it is characterized in that, described sensor device (30) is configured to the adjustable height sensor (31) of described load receiving device (3), wherein, in described electronic control package (25) by the descending speed of the described load receiving device of the adjustable height calculated signals of described adjustable height sensor (31) (3).
7. according to claim 6 jacking system, it is characterized in that, described sensor device (30) linear transducer (32) that is configured to restrict, described rope linear transducer are arranged on the crane (2) of described ground conveying machine or the car body and have a rope device (33) that is connected with described load receiving device (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012101949.5 | 2012-03-08 | ||
| DE201210101949 DE102012101949A1 (en) | 2012-03-08 | 2012-03-08 | Lifting device of a truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103303845A true CN103303845A (en) | 2013-09-18 |
Family
ID=47900628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100699543A Pending CN103303845A (en) | 2012-03-08 | 2013-03-05 | Lifting device of ground conveying machine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2636637A1 (en) |
| CN (1) | CN103303845A (en) |
| DE (1) | DE102012101949A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1022016B1 (en) * | 2013-09-06 | 2016-02-04 | N & B Knauf Et Cie S.C.S./E.C.V. | LIFTING DEVICE |
| CN106604886B (en) | 2014-09-15 | 2019-06-18 | 克朗设备公司 | Fork truck with optics cargo sensing structure |
| DE102014114136A1 (en) | 2014-09-29 | 2016-03-31 | Linde Material Handling Gmbh | Hydraulic drive system of a mobile work machine |
| DE102015119108A1 (en) | 2015-11-06 | 2017-05-11 | Pleiger Maschinenbau Gmbh & Co. Kg | Method and device for controlling a hydraulically actuated drive unit of a valve |
| DE102016124505A1 (en) * | 2016-12-15 | 2018-06-21 | Jungheinrich Aktiengesellschaft | Truck with a control unit for controlling the movement of a piston rod of a hydraulic cylinder and such a method |
| DE102016124504A1 (en) * | 2016-12-15 | 2018-06-21 | Jungheinrich Aktiengesellschaft | Lifting device for an industrial truck and such a truck |
| DE102018108946A1 (en) | 2018-04-16 | 2019-10-17 | Linde Material Handling Gmbh | Truck with a lifting device |
| DE102018119222A1 (en) | 2018-08-07 | 2020-02-13 | Linde Material Handling Gmbh | Lifting device of an industrial truck and method for operating the lifting device |
| DE102019121683A1 (en) | 2019-08-12 | 2021-02-18 | Still Gesellschaft Mit Beschränkter Haftung | Method for controlling a working hydraulic function of an industrial truck |
| EP3971128A1 (en) * | 2020-09-16 | 2022-03-23 | Toyota Material Handling Manufacturing Sweden AB | Material handling vehicle |
| DE102020134959A1 (en) * | 2020-12-28 | 2022-06-30 | Still Gesellschaft Mit Beschränkter Haftung | Method for operating a lifting device of an industrial truck and lifting device |
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| CN1220644A (en) * | 1997-02-06 | 1999-06-23 | 贝林格液压设备有限公司 | Method and device for controlling hydraulic lift |
| DE10021823A1 (en) * | 2000-05-04 | 2001-11-08 | Linde Ag | Hydraulic lifting device for running a battery operated industrial truck has a load suspension device with vertical motion operating with hydraulic lifting cylinders. |
| EP1203743A1 (en) * | 2000-11-04 | 2002-05-08 | STILL WAGNER GmbH & Co KG | Industrial truck with a device for detecting the lifting height |
| CN1628071A (en) * | 2002-02-11 | 2005-06-15 | 塞泰克股份公司 | Hydraulic system for a vehicle, a vehicle including such a hydraulic system and a suplementary unit for such a vehicle |
| EP1593645A2 (en) * | 2004-05-03 | 2005-11-09 | BT Industries | Hydraulic lifting device for a telescopically extendable fork lift truck mast |
| CN201301205Y (en) * | 2008-08-05 | 2009-09-02 | 浙江诺力机械股份有限公司 | Control loop for descending of fork of industrial vehicle |
| EP2123594A1 (en) * | 2008-05-23 | 2009-11-25 | BT Products AB | Industrial lift truck with speed control |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3497803B2 (en) * | 2000-08-25 | 2004-02-16 | 株式会社カワサキプレシジョンマシナリ | Solenoid control valve for industrial vehicles |
| JP4727653B2 (en) * | 2005-02-25 | 2011-07-20 | 三菱重工業株式会社 | Cargo handling and regeneration method for battery-powered industrial vehicles and cargo handling and regeneration system |
-
2012
- 2012-03-08 DE DE201210101949 patent/DE102012101949A1/en active Pending
-
2013
- 2013-03-04 EP EP20130157621 patent/EP2636637A1/en not_active Ceased
- 2013-03-05 CN CN2013100699543A patent/CN103303845A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220644A (en) * | 1997-02-06 | 1999-06-23 | 贝林格液压设备有限公司 | Method and device for controlling hydraulic lift |
| DE10021823A1 (en) * | 2000-05-04 | 2001-11-08 | Linde Ag | Hydraulic lifting device for running a battery operated industrial truck has a load suspension device with vertical motion operating with hydraulic lifting cylinders. |
| EP1203743A1 (en) * | 2000-11-04 | 2002-05-08 | STILL WAGNER GmbH & Co KG | Industrial truck with a device for detecting the lifting height |
| CN1628071A (en) * | 2002-02-11 | 2005-06-15 | 塞泰克股份公司 | Hydraulic system for a vehicle, a vehicle including such a hydraulic system and a suplementary unit for such a vehicle |
| EP1593645A2 (en) * | 2004-05-03 | 2005-11-09 | BT Industries | Hydraulic lifting device for a telescopically extendable fork lift truck mast |
| EP2123594A1 (en) * | 2008-05-23 | 2009-11-25 | BT Products AB | Industrial lift truck with speed control |
| CN201301205Y (en) * | 2008-08-05 | 2009-09-02 | 浙江诺力机械股份有限公司 | Control loop for descending of fork of industrial vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2636637A1 (en) | 2013-09-11 |
| DE102012101949A1 (en) | 2013-09-12 |
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