CN103112801B - Device, method and system for detecting height of forklift pallet fork - Google Patents
Device, method and system for detecting height of forklift pallet fork Download PDFInfo
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- CN103112801B CN103112801B CN201310045383.XA CN201310045383A CN103112801B CN 103112801 B CN103112801 B CN 103112801B CN 201310045383 A CN201310045383 A CN 201310045383A CN 103112801 B CN103112801 B CN 103112801B
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Abstract
The invention relates to forklift technology and power electronics detecting technology, in particular to a device, a method and a system for detecting the height of a forklift pallet fork. The device for detecting the height of the forklift pallet fork comprises a plurality of protrusions and hollows, a rack, a counter and a programmable logic controller, wherein the protrusions and the hollows are evenly arranged along the moving direction of an inner door frame in a spaced mode, the rack is in linkage with the inner door frame, the counter is fixed in corresponding to an outer door frame, and the programmable logic controller is used for receiving counting signals of the counter so as to obtain present height value of a pallet fork. The length and size of the protrusions along the moving direction of the inner door frame are identical. The length and size of the hollows along the moving direction of the inner door frame are identical. The device, the method and the system for detecting the height of the forklift pallet fork is low in cost, after the device is installed on a forklift, transforming to the forklift structure is small, and the device, the method and the system for detecting the height of the forklift pallet fork are beneficial for improvement of measuring accuracy of the forklift.
Description
Technical field
The present invention relates to fork truck technology and power electronics detection technique, particularly a kind of device, method and system detecting fork height of fork truck.
Background technology
The instrument of the detection fork height of fork truck existed in the market or device are also few, and some prices are very expensive, as laser ranging; Needing of having carries out larger change to fork truck, and commonality is strong, and inconvenience is universal, as coder coordinates the mode of Timing Belt; The detecting device even had, for the problem of installing, and cannot put this function to good use, as ultrasonic transduter; The enforcement of above three kinds of schemes, from the viewpoint of cost, cost performance is the end comparatively, not easily penetration and promotion in popular industrial transportation vehicle.
Other fork height detecting device, if Authorization Notice No. is the fork height control setup of a kind of fork truck disclosed in the patent of invention of CN 201121116Y, comprise pallet fork controller, pallet fork controller is connected with oil pump controller signal, oil pump controller is connected by data line with Oil pump electrical machinery, Oil pump electrical machinery and oil pump are connected, and oil pump and lift oil tank are connected; The stroke inductor be arranged on door frame is connected with pallet fork controller signals; This kind adopts the mode of oil pump control to need to make larger improvement to fork truck itself, and cost is higher.
And for example, Authorization Notice No. is the fork height induction installation of a kind of fork truck disclosed in the patent of invention of CN201125141Y, pallet fork support body is provided with induction wheel, and the line of induction is wound around along the circumference of induction wheel, and two of the line of induction is separately fixed on the upper and lower crossbeam of door frame; Inductor and induction wheel are coaxially arranged, and inductor is connected with forklift operator panel signal; When pallet fork runs up and down, the line of induction drives induction wheel to rotate, and inductor receives induction wheel turn signal, and operator just can accurately know by guidance panel the distance that pallet fork runs; This kind of induction installation is comparatively coarse, and precision is lower, and induction wheel is in use also fragile.
And for example, Authorization Notice No. is a kind of indicating equipment for fork height of fork truck disclosed in the patent of invention of CN201217626Y, the displacement pickup measuring inside and outside door frame displacement is installed between outer mast and inner upright mounting, displacement pickup is the read out instrument being connected to display shift value, the shift position of displacement pickup to inner upright mounting is utilized to detect, the signal detected is delivered to electronics package process, and numerical value is shown on the display apparatus; Displacement pickup is rotation sensor, and the fixed end of displacement pickup is fixed on outer mast, and its rotation portion connects with inner upright mounting; The scheme that the fork height induction installation that this scheme and aforementioned Authorization Notice No. are a kind of fork truck disclosed in the patent of invention of CN201125141Y adopts has common part, is all that the similar mode by rotation counting detects pallet fork height; Therefore, the precision of this scheme is lower, also fragile during rotation sensor also uses.
Summary of the invention
The object of this invention is to provide a kind of device detecting fork height of fork truck, its cost is lower, is installed on after on fork truck less to the transformation of fork lift truck structure, and is conducive to improving survey precision.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of device detecting fork height of fork truck, comprise along inner upright mounting moving direction uniform intervals be provided with multiple projection and depression and link in inner upright mounting tooth bar, with the relatively-stationary counting machine of outer mast, the count signal receiving described counting machine and draw the Programmable Logic Controller of pallet fork current level value; Described projection is identical along the length dimension on inner upright mounting moving direction; Described depression is identical along the length dimension on inner upright mounting moving direction.
As preferably of the present invention, this kind of device also comprises the relatively-stationary reset switch with outer mast; Described tooth bar has the reset trigger end that can trigger described reset switch.
As present invention further optimization, this kind of device also comprises relative with outer mast fixing and carry out the verification switch of checking command for triggering the pallet fork current level value drawn described Programmable Logic Controller; Described tooth bar has the verification trigger end that can trigger described verification switch.
Again further preferably described tooth bar has triggering projection as of the present invention, described reset trigger end is respectively the two side ends of described triggering projection with verification trigger end.
As preferably of the present invention, described projection is identical with the length dimension be recessed in along on inner upright mounting moving direction.
Another object of the present invention is also to provide a kind of method detecting fork height of fork truck, comprises
Contacted with reset switch by the reset trigger end be located on tooth bar and make the initialized step of counter O reset;
Tooth bar is risen with inner upright mounting and is detected by counting machine and arrived and step that is protruding through counting machine and/or depression number;
Count information is sent to the step of Programmable Logic Controller by counting machine in electrical signal form;
Programmable Logic Controller analyzes the step that count information calculates pallet fork current level value;
Contact by being located at verification trigger end on tooth bar with verification switch thus trigger the checking command of Programmable Logic Controller, make Programmable Logic Controller to current fork height value and be set in the step that the fork height maxim in Programmable Logic Controller verifies;
If checking command judges that current fork height value is not mated with fork height maxim, then the step of reporting to the police in performing.
Another object more of the present invention is to provide a kind of system detecting fork height of fork truck, comprises
Be provided with multiple projection and depression along inner upright mounting moving direction uniform intervals and link in the tooth bar of inner upright mounting;
Counting module, for detect in tooth bar moving process arrived and through counting module projection and/or depression number;
Reseting module, is triggered by the reset trigger end on tooth bar and makes counting module reset initialization;
Correction verification module, is triggered by the verification trigger end on tooth bar and triggers checking command;
Programmable control module, the information that count pick up module sends verifies current fork height value with the checking command calculating current fork height value and the transmission of reception correction verification module;
Described projection is identical along the length dimension on inner upright mounting moving direction; Described depression is identical along the length dimension on inner upright mounting moving direction.
As preferably of the present invention, described projection is identical with the length dimension be recessed in along on inner upright mounting moving direction.
In sum, the present invention has following beneficial effect: cost of the present invention is lower, and precision is higher; And less to the transformation of fork truck original design, the general fixed orifice only need offering stationary rack on inner upright mounting, outer mast is offered the fixed orifice of fixed count device, reset switch, verification switch; And due to the contact between each device be also only limitted to tooth bar in moving process, arrive certain position time, just and reset switch or verify contacting of switch; Therefore device generally can not damage in use, long service life; And by improving the frequency of counting machine and/or reducing the length dimension of raised line and depression, survey precision can also be improved further.
Accompanying drawing explanation
Fig. 1 is embodiment 1 pallet fork car schematic diagram when not raising;
Fig. 2 is embodiment 1 pallet fork schematic diagram when rising to highest point;
Fig. 3 is embodiment 2 diagram of circuit.
In figure, 11, protruding, 12, depression, 1, tooth bar, 2, outer mast, 3, counting machine, 6, verification switch, 5, reset switch, 13, trigger projection, 132, verification trigger end, 131, reset trigger end.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the amendment not having creative contribution as required after reading this specification sheets, as long as but be all subject to the protection of patent law in right of the present invention.
Embodiment 1: a kind of device detecting fork height of fork truck, as shown in Figure 1-2, comprise and be provided with multiple protruding 11 and depression 12 and link in the tooth bar 1 of inner upright mounting along inner upright mounting moving direction uniform intervals, protruding 11 identical along the length dimension on inner upright mounting moving direction; Depression 12 is identical along the length dimension on inner upright mounting moving direction; Generally, projection 11 and depression 12 are identical along the length dimension on inner upright mounting moving direction; The present embodiment sets projection 11 and depression 12 along the length on inner upright mounting moving direction all as x, and unit is mm.
Outer mast 2 top is provided with counting machine 3 and verification switch 6 from top to bottom successively, and the bottom of outer mast 2 is provided with reset switch 5.
The lower end of tooth bar 1 has triggers projection 13, and the two side ends up and down triggering projection 13 is respectively verification trigger end 132 and reset trigger end 131, is respectively used to and verifies switch 6 and reset switch 5 contacts and triggers command adapted thereto.
Counting machine 3 to have arrived and through counting machine 3 place protruding 11 and/or depression 12 numbers for detecting.
The present embodiment also comprises Programmable Logic Controller, draws pallet fork current level value for receiving the count signal of described counting machine 3.
Reset switch 5 on triggering, makes counting machine 3 reset and resets, initialization; If current pallet fork overall height angle value is S, setting pallet fork maximum height value is in the programmable controller S
0; After verification switch 6 triggers, Programmable Logic Controller is made to be S to current fork height value S and pallet fork maximum height value
0verify, if match, do not report to the police, if do not mate, report to the police.
Tooth bar 1 is shown for Fig. 1-2, if counting machine 3 detects protruding 11 numbers, then, if counting machine 3 detects depression 12 number, then, S and S
0matching error be 2x; If counting machine 3 counts protruding 11 and depression 12 simultaneously, then S can get the aviation value of the height value that above-mentioned two kinds of modes obtain, then S and S
0matching error be x; X
0for pallet fork elemental height value, predeterminable in Programmable Logic Controller.
Embodiment 2: a kind of system detecting fork height of fork truck, as shown in Figure 3, comprises
Multiple protruding 11 and depression 12 and link in the tooth bar 1 of inner upright mounting is provided with along inner upright mounting moving direction uniform intervals;
Counting module, for detect in tooth bar 1 moving process arrived and through counting module projection 11 and/or depression 12 numbers;
Reseting module, is triggered by the reset trigger end 131 on tooth bar 1 and makes counting module reset initialization;
Correction verification module, is triggered by the verification trigger end 132 on tooth bar 1 and triggers checking command;
Programmable control module, the information that count pick up module sends verifies current fork height value with the checking command calculating current fork height value and the transmission of reception correction verification module;
Projection 11 is identical along the length dimension on inner upright mounting moving direction; Depression 12 is identical along the length dimension on inner upright mounting moving direction.
Projection 11 and depression 12 are identical along the length dimension on inner upright mounting moving direction.
Action relationships between tooth bar 1 and each module can similar reference example 1.
Claims (6)
1. one kind is detected the device of fork height of fork truck, it is characterized in that, comprise along inner upright mounting moving direction uniform intervals be provided with multiple projection (11) and depression (12) and link in inner upright mounting tooth bar (1), with outer mast (2) relatively-stationary counting machine (3), the count signal receiving described counting machine (3) and draw the Programmable Logic Controller of pallet fork current level value; Described projection (11) is identical along the length dimension on inner upright mounting moving direction; Described depression (12) is identical along the length dimension on inner upright mounting moving direction;
This kind of device also comprises and outer mast (2) relatively-stationary reset switch (5); Described tooth bar (1) has the reset trigger end (131) that can trigger described reset switch (5);
This kind of device also comprises relative with outer mast (2) fixing and carry out the verification switch (6) of checking command for triggering the pallet fork current level value drawn described Programmable Logic Controller; Described tooth bar (1) has the verification trigger end (132) that can trigger described verification switch (6).
2. a kind of device detecting fork height of fork truck according to claim 1, it is characterized in that, described tooth bar (1) has triggering projection (13), described reset trigger end (131) is respectively the two side ends of described triggering projection (13) with verification trigger end (132).
3. a kind of device detecting fork height of fork truck according to claim 1, is characterized in that, described projection (11) and depression (12) are identical along the length dimension on inner upright mounting moving direction.
4. detect a method for fork height of fork truck, it is characterized in that, comprise
Contact by the reset trigger end (131) be located on tooth bar (1) with reset switch (5) and make counting machine (3) reset initialized step;
Tooth bar (1) is risen with inner upright mounting and is detected by counting machine (3) and to have arrived and through counting machine (3) projection (11) and/or the step of (12) number of caving in;
Count information is sent to the step of Programmable Logic Controller by counting machine (3) in electrical signal form;
Programmable Logic Controller analyzes the step that count information calculates pallet fork current level value;
Contact by being located at verification trigger end (132) on tooth bar (1) with verification switch (6) thus trigger the checking command of Programmable Logic Controller, make Programmable Logic Controller to current fork height value and be set in the step that the fork height maxim in Programmable Logic Controller verifies;
If checking command judges that current fork height value is not mated with fork height maxim, then the step of reporting to the police in performing.
5. detect a system for fork height of fork truck, it is characterized in that, comprise
Be provided with multiple projection (11) along inner upright mounting moving direction uniform intervals and cave in (12) and link in the tooth bar (1) of inner upright mounting;
Counting module, for detect in tooth bar (1) moving process arrived and through counting module projection (11) and/or depression (12) number;
Reseting module, is triggered by the reset trigger end (131) on tooth bar (1) and makes counting module reset initialization;
Correction verification module, is triggered by the verification trigger end (132) on tooth bar (1) and triggers checking command;
Programmable control module, the information that count pick up module sends verifies current fork height value with the checking command calculating current fork height value and the transmission of reception correction verification module;
Described projection (11) is identical along the length dimension on inner upright mounting moving direction; Described depression (12) is identical along the length dimension on inner upright mounting moving direction.
6. a kind of system detecting fork height of fork truck according to claim 5, is characterized in that, described projection (11) and depression (12) are identical along the length dimension on inner upright mounting moving direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310045383.XA CN103112801B (en) | 2013-02-06 | 2013-02-06 | Device, method and system for detecting height of forklift pallet fork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310045383.XA CN103112801B (en) | 2013-02-06 | 2013-02-06 | Device, method and system for detecting height of forklift pallet fork |
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| Publication Number | Publication Date |
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| CN103112801A CN103112801A (en) | 2013-05-22 |
| CN103112801B true CN103112801B (en) | 2015-03-18 |
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| CN201310045383.XA Active CN103112801B (en) | 2013-02-06 | 2013-02-06 | Device, method and system for detecting height of forklift pallet fork |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634583B (en) * | 2013-11-11 | 2017-06-30 | 宁波如意股份有限公司 | Raising vehicle test platform high |
| CN104860236A (en) * | 2015-05-14 | 2015-08-26 | 意欧斯仓储设备股份有限公司 | Device enabling fork to automatically return to horizontal position and forklift comprising same |
| CN105668464A (en) * | 2016-04-13 | 2016-06-15 | 厦门海普智能科技有限公司 | Forklift pallet fork height detection system |
| CN106044644A (en) * | 2016-07-27 | 2016-10-26 | 江苏科力机械有限公司 | Automatic forklift system |
| CN105967113A (en) * | 2016-07-27 | 2016-09-28 | 江苏科力机械有限公司 | Combined forklift control system |
| CN107144308B (en) * | 2017-07-07 | 2024-02-13 | 宁波如意股份有限公司 | Displacement and speed detection device and detection method thereof |
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| US4499541A (en) * | 1981-03-31 | 1985-02-12 | Kabushiki Kaisha Toyoda Jidoh Shokki Seisakusho | Input circuit of a fork lift truck control system for a fork lift truck |
| US6179304B1 (en) * | 1997-12-02 | 2001-01-30 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Axle pivot control method and apparatus for industrial vehicle |
| CN1719189A (en) * | 2004-07-08 | 2006-01-11 | 容海因里希股份公司 | Measurement standard for sensing lifting heights |
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| CN102506784A (en) * | 2011-11-24 | 2012-06-20 | 三一集团有限公司 | Sliding fit mechanism, measuring device, measuring method and container stacking machine |
| CN102756996A (en) * | 2011-04-29 | 2012-10-31 | 永恒力集团 | Industrial truck with limit switch assembly |
| CN102765681A (en) * | 2012-07-25 | 2012-11-07 | 无锡泰立特科技有限公司 | Forklift capable of detecting goods lifting height in real time |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4499541A (en) * | 1981-03-31 | 1985-02-12 | Kabushiki Kaisha Toyoda Jidoh Shokki Seisakusho | Input circuit of a fork lift truck control system for a fork lift truck |
| DE3208747A1 (en) * | 1982-03-11 | 1983-09-29 | Jungheinrich Unternehmensverwaltung Kg, 2000 Hamburg | Method of measuring the height of a vertically movable load suspension means on a lifting frame, and lifting vehicle for carrying out the method |
| US6179304B1 (en) * | 1997-12-02 | 2001-01-30 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Axle pivot control method and apparatus for industrial vehicle |
| CN1719189A (en) * | 2004-07-08 | 2006-01-11 | 容海因里希股份公司 | Measurement standard for sensing lifting heights |
| CN101934999A (en) * | 2010-08-05 | 2011-01-05 | 浙江中力机械有限公司 | Height-measuring and weighing device for forklift and weighing method |
| CN102756996A (en) * | 2011-04-29 | 2012-10-31 | 永恒力集团 | Industrial truck with limit switch assembly |
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| CN103112801A (en) | 2013-05-22 |
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Address after: 313100 Changxing County, Huzhou, Taihu street, long State Road, No. 528, No. Patentee after: Connaught machinery Limited by Share Ltd Address before: 313100 Changxing County Economic Development Zone, Zhejiang, Huzhou, No. 1 road, No. 58 Patentee before: Zhejiang Nuoli Machinery Co., Ltd. |
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Address after: 313100 No. 528 Changzhou Road, Changxing County Taihu street, Huzhou, Zhejiang. Patentee after: Nuo intelligent equipment Limited by Share Ltd Address before: 313100 No. 528 Changzhou Road, Changxing County Taihu street, Huzhou, Zhejiang. Patentee before: Connaught machinery Limited by Share Ltd |