CN115959595A - Heavy hydraulic lifting platform with stable lifting function and control method thereof - Google Patents
Heavy hydraulic lifting platform with stable lifting function and control method thereof Download PDFInfo
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- CN115959595A CN115959595A CN202310000946.7A CN202310000946A CN115959595A CN 115959595 A CN115959595 A CN 115959595A CN 202310000946 A CN202310000946 A CN 202310000946A CN 115959595 A CN115959595 A CN 115959595A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 50
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 238000010008 shearing Methods 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 230000001502 supplementing effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000013589 supplement Substances 0.000 abstract description 3
- 230000003028 elevating effect Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B50/00—Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
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Abstract
The invention provides a heavy hydraulic lifting platform with a stable lifting function and a control method thereof, wherein the heavy hydraulic lifting platform comprises a base, a fork shearing frame, a hydraulic cylinder, a lifting platform, a pull rope, a winch, an angle detection mechanism, a distance measurement mechanism, a pressure maintaining device and a controller, wherein the controller controls the working state of the hydraulic cylinder through information detected by the distance measurement mechanism so as to drive the lifting platform to lift to a specified height; after the lifting platform is lifted to a specified height, when the controller detects that the pressure in the hydraulic cylinder is reduced, the controller supplements the pressure to the hydraulic cylinder through the pressure maintaining device and adjusts the height of the lifting platform by matching with the distance measuring mechanism and the hydraulic cylinder again so as to realize stable control of the height position of the lifting platform; the controller can control the working state of the winch at each position of the lifting platform according to the information detected by the angle detection mechanism and the tension sensor so as to balance the moments at the two ends of the lifting platform, and the stable lifting of the lifting platform is realized, so that the lifting platform has better safety performance.
Description
Technical Field
The invention relates to the technical field of lifting platforms, in particular to a heavy hydraulic lifting platform with a stable lifting function and a control method thereof.
Background
At present, the basic structure and the working principle of a known scissor type hydraulic lifting platform are approximately the same, an inner chain sheet and an outer chain sheet are hinged through a pin shaft in the middle to form a scissor fork support, the scissor fork support is hinged with a base and a lifting platform surface through a hinged support respectively, wherein one end of the scissor fork support is provided with a roller, and the roller can slide along guide rails arranged on the base and the lifting platform; the hydraulic cylinder is horizontally or obliquely arranged, one end of the hydraulic cylinder is hinged with the lower end of the inner/outer chain sheet or the base, and the other end of the hydraulic cylinder is hinged with the outer/inner chain sheet; when the hydraulic cylinder is extended or shortened due to oil feeding or oil discharging, the included angle of the scissors fork consisting of the inner chain sheet and the outer chain sheet is reduced or increased, the upper roller and the lower roller which are arranged on the chain sheets slide inwards or outwards simultaneously, and the lifting platform surface is lifted or lowered. This kind of cut fork elevating platform is at the lift in-process, cut the one end of fork leg mount gyro wheel and relative elevating platform and base horizontal migration along with the lift of elevating platform, the bracing point that leads to cutting the relative elevating platform of fork support takes place the skew, it is uneven to cut fork support atress, its lift process is comparatively unstable, especially after the elevating platform rises to the take the altitude, the central point that the gyro wheel slipped elevating platform length puts, the elevating platform at this moment will be in the cantilever state, there is the danger that causes the unstability, present elevating platform is difficult to realize stably going up and down promptly, the security is lower.
Disclosure of Invention
The invention aims to provide a heavy hydraulic lifting platform with a stable lifting function and a control method thereof aiming at solving the problems.
The technical scheme of the invention is realized as follows:
a heavy hydraulic lift having a smooth lift function, comprising:
the device comprises a base, wherein a fork shearing frame is arranged on the base, a hydraulic cylinder for driving the fork shearing frame to stretch is arranged on the fork shearing frame, a lifting platform is arranged at the upper end of the fork shearing frame, pull ropes are arranged at four corners of the lifting platform, one end of each pull rope is connected with a winch, and a tension sensor capable of detecting tension of the pull ropes is connected to each pull rope;
the angle detection mechanism is arranged on the lifting platform and used for measuring the deflection angle of the lifting platform;
the distance measuring mechanism is arranged on the base and is used for detecting the lifting height of the lifting platform;
the pressure maintaining device is connected with the hydraulic cylinder and is used for maintaining the internal pressure of the hydraulic cylinder;
the controller is respectively electrically connected with the hydraulic cylinder, the winch, the tension sensor, the angle detection mechanism, the distance measurement mechanism and the pressure maintaining device, and can control the working states of the hydraulic cylinder, the winch and the pressure maintaining device according to information detected by the tension sensor, the angle detection mechanism and the distance measurement mechanism.
Preferably, the upper right end of the fork shearing frame is hinged to the lifting platform, the lower right end of the fork shearing frame is hinged to the base, the upper left end of the fork shearing frame is hinged to a first sliding rod, the lower left end of the fork shearing frame is hinged to a second sliding rod, the first sliding rod is movably mounted on the lifting platform, and the second sliding rod is movably mounted on the base.
Preferably, the pressurizer is an energy accumulator, and the controller is electrically connected with the energy accumulator and can control the working state of the energy accumulator.
Preferably, the angle detection mechanism comprises an installation platform, a metal ball and a plurality of piezoelectric patches, the installation platform is arranged on the lifting platform, a chute for the metal ball to roll is formed in the installation platform, the piezoelectric patches are uniformly arranged on the chute, and the controller is electrically connected with the piezoelectric patches.
Preferably, the sliding groove is an arc-shaped groove, and a limiting groove is arranged in the middle of the sliding groove.
Preferably, the distance measuring mechanism is a laser distance measuring instrument.
Preferably, the winding engine is provided with an encoder for measuring the number of turns of the winding engine, and the controller is electrically connected with the encoder.
A control method of a heavy hydraulic lifting platform with a stable lifting function comprises the following steps:
s1: the controller detects the height information of the lifting platform in real time according to the laser range finder and controls the working state of the hydraulic cylinder to drive the lifting platform to move to a specified height position, and the controller records the pressure information of the hydraulic cylinder;
s2: after the step S1 is finished, when the controller detects that the pressure of the hydraulic cylinder is reduced, the controller controls the working states of the pressure maintaining device and the hydraulic cylinder to drive the pressure maintaining device to perform pressure supplementing work on the hydraulic cylinder so as to maintain the pressure of the hydraulic cylinder to be stable, and in the process, the controller maintains the height position of the lifting platform again in the control mode of the step S1;
s3: when the angle detection mechanism detects that the lifting platform deflects, the controller controls the working state of each winch according to the angle information detected by the angle detection mechanism and the pull rope tension information detected by the tension sensor so as to drive the lifting platform to tend to a horizontal state;
s4: when the laser range finder detects that the height of the lifting platform changes and the angle detection mechanism detects that the lifting platform does not deflect, the controller controls the working state of each winch according to information detected by the laser range finder, the angle detection mechanism and the tension sensor so as to balance the torque at the two ends of the lifting platform.
Compared with the prior art, the invention has the following beneficial effects:
the controller controls the working state of the hydraulic cylinder through the information detected by the distance measuring mechanism so as to drive the lifting platform to lift to a specified height and record the pressure information of the hydraulic cylinder; after the lifting platform is lifted to a specified height, when the controller detects that the pressure in the hydraulic cylinder is reduced, the controller supplements the pressure to the hydraulic cylinder through the pressure maintaining device and adjusts the height of the lifting platform by matching with the distance measuring mechanism and the hydraulic cylinder again to maintain the height position of the lifting platform, and therefore stable control of the height position of the lifting platform is achieved; the controller can control the working state of the winch at each position of the lifting platform according to the inclination state information of the lifting platform detected by the angle detection mechanism and the tension information detected by the tension sensor so as to balance the moments at the two ends of the lifting platform and realize the stable lifting of the lifting platform.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of the structure of the fork shearing frame in one embodiment of the invention;
FIG. 3 is a schematic structural diagram of an angle detection mechanism according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a connection between a controller and other devices according to an embodiment of the present invention.
In the figure, 1-base; 2-fork-shearing frame; 21-a hydraulic cylinder; 22-a first slide bar; 23-a second slide bar; 3-lifting the platform; 31-a pull rope; 32-a winch; 33-a tension sensor; 4-an angle detection mechanism; 41-mounting a table; 42-a metal ball; 43-piezoelectric sheet; 5-a distance measuring mechanism; 6-a pressure maintaining device; 7-a controller; 8-a chute; 81-limiting groove.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, preferred embodiments of which are illustrated in the accompanying drawings, wherein the drawings are provided for the purpose of visually supplementing the description in the specification and so forth, and which are not intended to limit the scope of the invention.
Example 1:
referring to fig. 1 to 4, the present invention provides a heavy hydraulic lift table having a smooth lifting function, including:
the device comprises a base 1, wherein a fork frame 2 is arranged on the base 1, a hydraulic cylinder 21 for driving the fork frame 2 to stretch is arranged on the fork frame 2, a lifting platform 3 is arranged at the upper end of the fork frame 2, pull ropes 31 are arranged at four corners of the lifting platform 3, one end of each pull rope 31 is connected with a winch 32, and a tension sensor 33 capable of detecting tension of the pull rope 31 is connected to each pull rope 31;
the angle detection mechanism 4 is arranged on the lifting platform 3 and is used for measuring the deflection angle of the lifting platform 3;
the distance measuring mechanism 5 is arranged on the base 1 and used for detecting the lifting height of the lifting platform 3;
a pressurizer 6, the pressurizer 6 being connected to the hydraulic cylinder 21 and maintaining the internal pressure of the hydraulic cylinder 21;
the controller 7 and the controller 7 are respectively electrically connected with the hydraulic cylinder 21, the winch 32, the tension sensor 33, the angle detection mechanism 4, the distance measurement mechanism 5 and the pressure maintaining device 6, and can control the working states of the hydraulic cylinder 21, the winch 32 and the pressure maintaining device 6 according to information detected by the tension sensor 33, the angle detection mechanism 4 and the distance measurement mechanism 5.
The controller 7 controls the working state of the hydraulic cylinder 21 through the information detected by the distance measuring mechanism 5 to drive the lifting platform 3 to lift to a specified height and record the pressure information of the hydraulic cylinder 21; after the lifting platform 3 is lifted to a specified height, when the controller 7 detects that the pressure in the hydraulic cylinder 21 is reduced, the controller 7 supplements the pressure to the hydraulic cylinder 21 through the pressure maintaining device 6 and adjusts the height of the lifting platform 3 by cooperating with the distance measuring mechanism 5 and the hydraulic cylinder 21 again to maintain the height position of the lifting platform 3, namely realizing the stable control of the height position of the lifting platform 3; the controller 7 can control the working state of the winch 32 at each position of the lifting platform 3 according to the inclination state information of the lifting platform 3 detected by the angle detection mechanism 4 and the tension information detected by the tension sensor 33, so as to balance the moments at the two ends of the lifting platform 3, realize the stable lifting of the lifting platform 3, and have better safety performance. Wherein, the controller 7 is a PLC controller 7, and the tension sensor 33 is a GAD10.
Specifically, the upper right end of the fork shearing frame 2 is hinged to the lifting platform 3, the lower right end of the fork shearing frame 2 is hinged to the base 1, the upper left end of the fork shearing frame 2 is hinged to the first slide bar 22, the lower left end of the fork shearing frame 2 is hinged to the second slide bar 23, the first slide bar 22 is movably mounted on the lifting platform 3, and the second slide bar 23 is movably mounted on the base 1. The hydraulic cylinder 21 drives the piston rod to move relative to the fork frame 2, so that the fork frame 2 can be driven to gather towards the middle or expand towards the two sides, and the lifting work of the lifting platform 3 is realized.
Specifically, the pressure maintaining device 6 is an energy accumulator, and the controller 7 is electrically connected with the energy accumulator and can control the working state of the energy accumulator. The accumulator model is AC40-1/4-120.
Example 2:
referring to fig. 1 to 4, in combination with the technical solution of embodiment 1, in this embodiment, the angle detection mechanism 4 includes an installation platform 41, a metal ball 42, and a plurality of piezoelectric patches 43, the installation platform 41 is disposed on the lifting platform 3, a chute 8 for the metal ball 42 to roll is disposed on the installation platform 41, the plurality of piezoelectric patches 43 are uniformly disposed on the chute 8, and the controller 7 is electrically connected to the piezoelectric patches 43.
The mount table 41 is fixed on the lifting platform 3 and can move along with the lifting platform 3, when the lifting platform 3 inclines, the mount table 41 inclines along with the lifting platform 3, the metal ball 42 moves along the chute 8 in the mount table 41, the pressure information of the metal ball 42 is converted into an electrical signal through the piezoelectric patches 43 and is sent to the controller 7, the controller 7 judges the position information of the metal ball 42 according to the electrical signal so as to judge the inclination angle of the lifting platform 3, and the angle detection work of the lifting platform 3 is realized.
Specifically, the sliding groove 8 is an arc-shaped groove, and a limiting groove 81 is arranged in the middle of the sliding groove 8.
Set the spout 8 to the arc wall and set up spacing groove 81 in order to play certain limiting displacement to metal ball 42 in spout 8 middle part position, make metal ball 42 be difficult for rocking at will, only when elevating platform 3 inclines and surpasses certain angle promptly, controller 7 just can detect the inclination change of elevating platform 3, the reasonable inclination scope of elevating platform 3 has been injectd promptly, only after elevating platform 3 surpasss reasonable inclination scope controller 7 just can cooperate hoist engine 32 to carry out angle modulation to elevating platform 3, reduce because of slightly rocking or other external force factors arouse that controller 7 frequently carries out elevating platform 3's angle modulation work, when reducing controller 7 work burden, realize controller 7's rationalization control.
Specifically, the distance measuring mechanism 5 is a laser distance measuring instrument. The laser rangefinder is model LM600.
Specifically, the winding machine 32 is provided with an encoder for measuring the number of turns of the winding machine 32, and the controller 7 is electrically connected with the encoder. The controller 7 can more accurately control the working state of the winch 32 through the encoder by arranging the encoder capable of detecting the rotation number of the winch 32 on the winch 32, so that the control precision of the controller 7 on the winch 32 is improved.
A control method of a heavy hydraulic lifting platform with a stable lifting function comprises the following steps:
s1: the controller 7 detects the height information of the lifting platform 3 in real time according to the laser range finder and controls the working state of the hydraulic cylinder 21 to drive the lifting platform 3 to move to a specified height position, and the controller 7 records the pressure information of the hydraulic cylinder 21;
s2: after step S1 is completed, when the controller 7 detects that the pressure of the hydraulic cylinder 21 decreases, the controller 7 controls the operating states of the pressure maintaining device 6 and the hydraulic cylinder 21 to drive the pressure maintaining device 6 to perform pressure compensation operation on the hydraulic cylinder 21 to maintain the pressure of the hydraulic cylinder 21 stable, and during this process, the controller 7 maintains the height position of the lifting platform 3 by the control manner of step S1 again;
s3: when the angle detection mechanism 4 detects that the lifting platform 3 deflects, the controller 7 controls the working state of each winch 32 according to the angle information detected by the angle detection mechanism 4 and the tension information of the pull rope 31 detected by the tension sensor 33 so as to drive the lifting platform 3 to tend to a horizontal state;
s4: when the laser range finder detects that the height of the lifting platform 3 changes and the angle detection mechanism 4 detects that the lifting platform 3 does not deflect, the controller 7 controls the working state of each winch 32 according to the information detected by the laser range finder, the angle detection mechanism 4 and the tension sensor 33 so as to balance the moments at the two ends of the lifting platform 3.
The above are only preferred embodiments of the present invention, and the present invention is not limited in any way. Those skilled in the art can make many possible variations and modifications to the disclosed solution, or modify equivalent embodiments using the teachings set forth above, without departing from the scope of the claimed solution. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technology of the present invention are within the protection scope of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (8)
1. A heavy hydraulic lifting platform with stable lifting function is characterized by comprising:
the device comprises a base, wherein a fork frame is arranged on the base, a hydraulic cylinder for driving the fork frame to stretch is arranged on the fork frame, a lifting platform is arranged at the upper end of the fork frame, pull ropes are arranged at four corners of the lifting platform, one end of each pull rope is connected with a winch, and a tension sensor capable of detecting the tension of the pull ropes is connected to each pull rope;
the angle detection mechanism is arranged on the lifting platform and used for measuring the deflection angle of the lifting platform;
the distance measuring mechanism is arranged on the base and is used for detecting the lifting height of the lifting platform;
the pressure maintaining device is connected with the hydraulic cylinder and is used for maintaining the internal pressure of the hydraulic cylinder;
the controller, the controller respectively with the pneumatic cylinder, the hoist engine, tension sensor, angle detection mechanism the range finding mechanism with pressurizer electric connection to can be according to the information control that tension sensor, angle detection mechanism and the range finding mechanism detected the pneumatic cylinder, the hoist engine with the operating condition of pressurizer.
2. The heavy hydraulic lift platform with smooth lifting function according to claim 1, wherein:
the right upper end of the fork shearing frame is hinged to the lifting platform, the right lower end of the fork shearing frame is hinged to the base, the left upper end of the fork shearing frame is hinged to a first sliding rod, the left lower end of the fork shearing frame is hinged to a second sliding rod, the first sliding rod is movably mounted on the lifting platform, and the second sliding rod is movably mounted on the base.
3. The heavy hydraulic lift platform with smooth lifting function according to claim 1, wherein:
the pressure maintaining device is an energy accumulator, and the controller is electrically connected with the energy accumulator and can control the working state of the energy accumulator.
4. The heavy hydraulic lift platform with smooth lifting function according to claim 1, wherein:
the angle detection mechanism comprises an installation platform, a metal ball and a plurality of piezoelectric patches, the installation platform is arranged on the lifting platform, a sliding groove for the metal ball to roll is formed in the installation platform, the piezoelectric patches are evenly arranged on the sliding groove, and the controller is electrically connected with the piezoelectric patches.
5. A heavy hydraulic lift platform with smooth lift function according to claim 4 wherein:
the spout is the arc wall, the middle part position of spout is provided with the spacing groove.
6. A heavy hydraulic lift platform with smooth lift function according to claim 1 wherein:
the distance measuring mechanism is a laser distance measuring instrument.
7. The heavy hydraulic lift platform with smooth lifting function according to claim 1, wherein:
the winding engine is provided with an encoder used for measuring the number of turns of the winding engine, and the controller is electrically connected with the encoder.
8. A control method of a heavy hydraulic lift platform with a smooth lifting function using claims 1 to 7, characterized by comprising the steps of:
s1: the controller detects the height information of the lifting platform in real time according to the laser range finder and controls the working state of the hydraulic cylinder to drive the lifting platform to move to a specified height position, and the controller records the pressure information of the hydraulic cylinder;
s2: after the step S1 is finished, when the controller detects that the pressure of the hydraulic cylinder is reduced, the controller controls the working states of the pressure maintaining device and the hydraulic cylinder to drive the pressure maintaining device to perform pressure supplementing work on the hydraulic cylinder so as to maintain the pressure of the hydraulic cylinder to be stable, and in the process, the controller maintains the height position of the lifting platform in the control mode of the step S1 again;
s3: when the angle detection mechanism detects that the lifting platform deflects, the controller controls the working state of each winch according to the angle information detected by the angle detection mechanism and the pull rope tension information detected by the tension sensor so as to drive the lifting platform to be in a horizontal state;
s4: when the laser range finder detects that the height of the lifting platform changes and the angle detection mechanism detects that the lifting platform does not deflect, the controller controls the working state of each winch according to information detected by the laser range finder, the angle detection mechanism and the tension sensor so as to balance the moments at the two ends of the lifting platform.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310000946.7A CN115959595A (en) | 2023-01-03 | 2023-01-03 | Heavy hydraulic lifting platform with stable lifting function and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310000946.7A CN115959595A (en) | 2023-01-03 | 2023-01-03 | Heavy hydraulic lifting platform with stable lifting function and control method thereof |
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| CN115959595A true CN115959595A (en) | 2023-04-14 |
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| CN202310000946.7A Pending CN115959595A (en) | 2023-01-03 | 2023-01-03 | Heavy hydraulic lifting platform with stable lifting function and control method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201463884U (en) * | 2009-07-15 | 2010-05-12 | 包顶峰 | Piezoelectric type electronic gradienter |
| CN113800436A (en) * | 2021-09-16 | 2021-12-17 | 中集物联科技有限公司 | Elevating platform and inclination detection method thereof |
| CN115303982A (en) * | 2022-09-14 | 2022-11-08 | 北京环境特性研究所 | Lifting platform for target electromagnetic characteristic test |
-
2023
- 2023-01-03 CN CN202310000946.7A patent/CN115959595A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201463884U (en) * | 2009-07-15 | 2010-05-12 | 包顶峰 | Piezoelectric type electronic gradienter |
| CN113800436A (en) * | 2021-09-16 | 2021-12-17 | 中集物联科技有限公司 | Elevating platform and inclination detection method thereof |
| CN115303982A (en) * | 2022-09-14 | 2022-11-08 | 北京环境特性研究所 | Lifting platform for target electromagnetic characteristic test |
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