CN115231476B - Unbalanced load protection structure and method for weighing fork - Google Patents
Unbalanced load protection structure and method for weighing fork Download PDFInfo
- Publication number
- CN115231476B CN115231476B CN202210747610.2A CN202210747610A CN115231476B CN 115231476 B CN115231476 B CN 115231476B CN 202210747610 A CN202210747610 A CN 202210747610A CN 115231476 B CN115231476 B CN 115231476B
- Authority
- CN
- China
- Prior art keywords
- fork
- weighing
- goods
- lifting frame
- gravity center
- 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.)
- Active
Links
- 238000005303 weighing Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000005484 gravity Effects 0.000 claims abstract description 39
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
-
- 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
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The utility model provides an unbalanced load protection structure and method for a weighing fork, which belong to the technical field of forklifts and comprise two fork feet which are perpendicular to the fork lifts and are fixedly arranged on the fork lifts, fork foot cover plates are arranged on the fork feet, weighing sensors are respectively arranged at two ends of the fork feet, and a controller is arranged on the fork lifts and is electrically connected with the weighing sensors. According to the utility model, whether the goods are positioned at the gravity center of the forklift or not can be detected, if the gravity center of the goods on the forklift is not the gravity center of the forklift, when the deviation between the gravity center of the goods and the gravity center of the forklift exceeds a certain range, the gravity center of the forklift is unstable when the forklift carries the goods, the goods are likely to fall off or the risk of the forklift turning over occurs, and the controller stops the operation of the forklift according to the calculation result, so that the danger is avoided.
Description
Technical Field
The utility model belongs to the technical field of forklifts, and particularly relates to an unbalanced load protection structure and method of a weighing fork.
Background
The utility model discloses an automatic horizontal weighing forklift, which has the advantages that a weighing metering mechanism is arranged on the forklift, so that the weight of the goods can be measured and calculated when the forklift carries the goods, the overweight phenomenon of the goods is prevented, and the safety degree of the operation is improved.
In the process of carrying cargoes, if the center of gravity of cargoes on the forklift is not in the center of the forklift, and if the offset is large, the cargoes fall or the unstable operation of the forklift occurs, and certain risks are increased for carrying cargoes and carrying personnel.
Disclosure of Invention
The utility model provides an unbalanced load protection structure and method of a weighing fork, aiming at the risk of potential safety hazards caused by larger offset of the gravity center of the goods on the fork truck in the process of carrying the goods of the fork truck capable of weighing in the prior art.
The utility model aims at realizing the following technical scheme: the utility model provides a unbalanced load protection architecture of fork of weighing, includes the fork hoisting frame, is fixed on the fork hoisting frame to be equipped with two fork feet of perpendicular to fork hoisting frame, be equipped with fork foot apron on the fork foot, weighing sensor is installed respectively at the both ends of fork foot, is equipped with the controller on the fork hoisting frame, this controller and weighing sensor electric connection.
In the above-mentioned scheme, weighing sensor is all installed at the both ends of every fork foot, the weight that detects through four weighing sensor can calculate whether the goods on the fork truck is located fork truck's gravity center, if the focus of goods on fork truck is not fork truck's gravity center, when the focus of goods and fork truck's focus deviation surpass certain scope, then can the focus unstable when fork truck carries the goods, the risk that probably makes the goods drop or appear fork truck rollover, the operation of fork truck can be stopped according to the calculation result to avoid dangerous emergence.
Preferably, the controller is a PLC touch screen integrated machine. The PLC touch screen all-in-one machine integrates a touch screen and a PLC controller, is small in size and can be directly mounted on a forklift.
Preferably, a pressure transmitter is further arranged between the controller and the weighing sensor, and data of the weighing sensor are converted into data signals which can be identified by the controller through the pressure transmitter and then transmitted to the controller.
Preferably, the fork lifting frame is further provided with a laser range finder electrically connected with the controller, the lower end of the laser range finder is provided with a through hole, laser of the laser range finder passes through the fork lifting frame through the through hole and irradiates the ground right below the fork lifting frame to measure and calculate the lifting height of the fork, and when unbalanced load of the goods on the forklift exceeds a certain range, the forklift can be locked to continue to operate so as to ensure safety.
Preferably, the upper end face of the weighing sensor is slightly higher than the upper end face of the fork leg, and when the fork leg cover plate is installed on the fork leg, the lower end face of the fork leg cover plate is fully contacted with the weighing sensor. The weighing sensor is protected from being in direct contact with the goods.
Preferably, the fork legs are provided with mounting grooves for mounting the weighing sensors.
Preferably, the fork lifting frame is provided with an inwards concave instrument mounting cavity for mounting the pressure transmitter and the laser range finder, and an instrument cover plate for covering the instrument mounting cavity is arranged outside the instrument mounting cavity.
The method for adopting the unbalanced load protection structure of the weighing fork comprises four weighing sensors, namely L1, L2, R1 and R2, and detecting pressure data, namely QL1, QL2, QR1 and QR2, and comprises the following steps:
1) And measuring the weight of the goods on the fork feet, and decomposing the load gravity center position of the goods into a position distance C from the fork lifting frame and a relative position of the load gravity center between two forks, wherein the distance between the relative position of the load gravity center between the two forks and the center line between the two forks is the offset S of the load gravity center offset from the center line of the forks.
2) The values of C and S are set on the controller according to the weight of the goods, when the value of C of the load gravity center of the goods exceeds a set value, the fork lifting frame cannot lift, and when the value of S of the load gravity center of the goods exceeds the set value, the fork lifting frame stops running and locks the forklift to be unable to move.
Preferably, the calculation formula of C is
C= [ (ql2+qr 2) ×a1+ (ql1+qr 1) ×a2 ]/(ql1+ql2+qr 1+qr 2), where A1 is the distance between the load points of the load cells L2, R2 and the fork lift 1, and A2 is the distance between the load points of the two load cells of the same fork foot 2;
the calculation formula of S is
S=b/2- [ (B-B1) ql2/2+ (B-B2) ql1/2+ (b+b1) QR2/2+ (b+b2) QR1/2 ]/(ql1+ql2+ql3+ql4) wherein: b is the outer width between two fork feet 2, B1 is the distance between the stress points of the weighing sensors L2 and R2, B2 is the distance between the stress points of the weighing sensors L1 and R1, and C is the distance between the gravity center of the actual load and the fork lifting frame.
Compared with the prior art, the utility model has the following beneficial effects:
through the weight that four weighing sensor detected, can calculate whether the goods on the fork truck are located fork truck's gravity center, if the focus of goods on fork truck is not fork truck's gravity center, when the focus of goods and fork truck's focus deviation surpass certain scope, can the focus unstable when fork truck carries the goods, the risk that probably makes the goods drop or appear fork truck rollover, the operation of fork truck can be stopped according to the calculation result to avoid dangerous emergence to the controller.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of another view of the present utility model;
FIG. 3 is an exploded view of the present utility model;
FIG. 4 is a schematic diagram of the load center of gravity distribution of the present utility model;
FIG. 5 is a diagram of a detection and vertical setting interface on a controller.
The marks in the figure: 1. a fork lifting frame; 2. fork legs; 3. fork foot cover plate; 4. an instrument mounting cavity; 5. an instrument cover plate; 6. a pressure transmitter; 7. a laser range finder; 8. a controller; 9. a mounting groove; 10. a through hole; 11. A load cell.
Detailed Description
The utility model is further described below with reference to embodiments shown in the drawings in which:
as shown in fig. 1 to 4, an unbalanced load protection structure of a weighing fork comprises a fork lifting frame 1, wherein a concave instrument mounting cavity 4 is arranged on the fork lifting frame 1, a pressure transmitter 6 and a laser range finder 7 are arranged in the instrument mounting cavity 4, and an instrument cover plate 5 for covering the instrument mounting cavity 4 is arranged outside the instrument mounting cavity 4. A controller 8 is mounted on one side of the fork lifting frame 1 opposite to the instrument mounting cavity 4, and the controller 8 is a PLC touch screen integrated machine. Two fork feet 2 perpendicular to the fork lifting frame 1 are fixedly arranged on the fork lifting frame 1, mounting grooves 9 are respectively formed in two ends of the fork feet 2, weighing sensors 11 are arranged in the mounting grooves 9, and detection signals of the four weighing sensors 11 are converted into data signals which can be identified by the controller 8 through the pressure transmitter 6 and then transmitted to the controller 8; the laser range finder 7 is electrically connected with the controller 8. Through the weight that four weighing sensor 11 detected, can calculate whether the goods on the fork truck are located fork truck's gravity center, if the focus of goods on fork truck is not fork truck's gravity center, when the focus of goods and fork truck's focus deviation exceeds certain scope, can the focus unstable when fork truck carries the goods, probably makes the goods drop or appear the risk that fork truck overturns, and the operation of fork truck can be stopped according to the calculation result to the controller 8 to avoid dangerous emergence.
The fork leg 2 is further provided with a fork leg cover plate 3, the upper end face of the weighing sensor 11 is slightly higher than the upper end face of the fork leg 2, and when the fork leg cover plate 3 is installed on the fork leg 2, the lower end face of the fork leg cover plate 3 is fully contacted with the weighing sensor 11. The load cell 11 is protected from direct contact with the cargo.
The method for adopting the unbalanced load protection structure of the weighing fork comprises four weighing sensors, namely L1, L2, R1 and R2, and detecting pressure data, namely QL1, QL2, QR1 and QR2, and comprises the following steps:
1) And measuring the weight of the goods on the fork feet, and decomposing the load gravity center position of the goods into a position distance C from the fork lifting frame and a relative position of the load gravity center between two forks, wherein the distance between the relative position of the load gravity center between the two forks and the center line between the two forks is the offset S of the load gravity center offset from the center line of the forks.
2) The values of C and S are set on the controller according to the weight of the goods, when the value of C of the load gravity center of the goods exceeds a set value, the fork lifting frame cannot lift, and when the value of S of the load gravity center of the goods exceeds the set value, the fork lifting frame stops running and locks the forklift to be unable to move.
The calculation formula of C is C= [ (QL2+QR2) ×A1+ (QL1+QR1) ×A2 ]/(QL1+QL2+QR1+QR2), wherein A1 is the distance between the stress points of the weighing sensors L2 and R2 and the fork lifting frame 1, and A2 is the distance between the stress points of the two weighing sensors of the same fork foot 2;
the calculation formula of S is
S=b/2- [ (B-B1) ql2/2+ (B-B2) ql1/2+ (b+b1) QR2/2+ (b+b2) QR1/2 ]/(ql1+ql2+ql3+ql4) wherein: b is the outer width between two fork feet 2, B1 is the distance between the stress points of the weighing sensors L2 and R2, B2 is the distance between the stress points of the weighing sensors L1 and R1, and C is the distance between the gravity center of the actual load and the fork lifting frame.
When the goods are placed on the utility model, the weight of the goods falls on the two fork feet 2, the gravity center of the goods deviates to one fork foot 2 or deviates to the front end/rear end of the fork foot 2, and the weights detected by the four weighing sensors 11 are different.
According to the two calculation formulas, the larger the value of C is, the farther the center of gravity of the goods on the forklift is from the fork lifting frame 1 is, the weaker the lifting capacity of the forklift is, and the lighter the weight of the goods which can be lifted is determined by the system. The greater the S value, the further the center of gravity of the cargo deviates from the center line of the two-pronged foot 2, the more the cargo is at risk of falling. So, when the fork truck detects that the S value exceeds the safety preset value in the lifting or descending process by combining the laser range finder 7, the controller 8 can lock the lifting/descending control signal of the fork truck, and if the fork truck is in a running state, the fork truck can be locked and cannot continue to run so as to ensure the safety of goods and personnel.
The relation between the C value and the maximum load allowed to be lifted by the forklift, and the S value is a safe preset value allowed to be unbalanced-loaded, which is shown in fig. 5.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (8)
1. The unbalanced load protection method for the weighing fork is characterized by being based on an unbalanced load protection structure, wherein the unbalanced load protection structure comprises a fork lifting frame (1), two fork feet (2) perpendicular to the fork lifting frame (1) are fixedly arranged on the fork lifting frame (1), and the unbalanced load protection method is characterized in that fork foot cover plates (3) are arranged on the fork feet (2), weighing sensors (11) are respectively arranged at two ends of the fork feet (2), a controller (8) is arranged on the fork lifting frame (1), and the controller (8) is electrically connected with the weighing sensors (11);
the method for the unbalanced load protection structure comprises the following steps of:
1) Measuring the weight of the goods on the fork feet, decomposing the load gravity center position of the goods into a position distance C from the goods fork lifting frame and a relative position of the load gravity center between two goods forks, wherein the distance between the relative position of the load gravity center between two goods forks and the central line between two goods forks is the offset S of the load gravity center offset from the central line of the goods fork;
2) The values of C and S are set on the controller according to the weight of the goods, when the value of C of the load gravity center of the goods exceeds a set value, the fork lifting frame cannot lift, and when the value of S of the load gravity center of the goods exceeds the set value, the fork lifting frame stops running and locks the forklift to be unable to move.
2. The method for protecting the unbalanced load of the weighing fork according to claim 1, wherein the calculation formula of C is c= [ (ql2+qr 2) ×a1+ (ql1+qr 1) ×a2 ]/(ql1+ql2+qr 1+qr 2), wherein A1 is the distance between the load bearing points of the weighing sensors L2 and R2 and the fork lifting frame, and A2 is the distance between the load bearing points of two weighing sensors of the same fork leg;
the calculation formula of S is
S=b/2- [ (B-B1) ql2/2+ (B-B2) ql1/2+ (b+b1) QR2/2+ (b+b2) QR1/2 ]/(ql1+ql2+ql3+ql4) wherein: b is the outer width between two fork feet (2), B1 is the distance between the stress points of the weighing sensors L2 and R2, B2 is the distance between the stress points of the weighing sensors L1 and R1, and C is the distance from the gravity center of the actual load to the fork lifting frame.
3. The unbalanced load protection method of the weighing fork according to claim 1, wherein the controller (8) is a PLC touch screen integrated machine.
4. The unbalanced load protection method of the weighing fork according to claim 1, wherein a pressure transmitter (6) is further arranged between the controller (8) and the weighing sensor (11).
5. The unbalanced load protection method of the weighing fork according to claim 1, wherein the fork lifting frame (1) is further provided with a laser range finder (7) electrically connected with the controller (8), a through hole (10) is formed in the lower end of the laser range finder (7), and laser of the laser range finder (7) passes through the fork lifting frame (1) through the through hole (10) and irradiates the ground right below the fork lifting frame (1).
6. The unbalanced load protection method of the weighing fork according to claim 1, wherein the upper end face of the weighing sensor (11) is slightly higher than the upper end face of the fork leg (2), and when the fork leg cover plate (3) is installed on the fork leg (2), the lower end face of the fork leg cover plate (3) is fully contacted with the weighing sensor (11).
7. The unbalanced load protection method of the weighing fork according to claim 1, wherein the fork leg (2) is provided with a mounting groove (9) for mounting a weighing sensor (11).
8. The unbalanced load protection method of the weighing fork according to claim 1, wherein the fork lifting frame (1) is provided with an inward concave instrument mounting cavity (4) for mounting a pressure transmitter (6) and a laser range finder (7), and an instrument cover plate (5) for covering the instrument mounting cavity (4) is arranged outside the instrument mounting cavity (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210747610.2A CN115231476B (en) | 2022-06-28 | 2022-06-28 | Unbalanced load protection structure and method for weighing fork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210747610.2A CN115231476B (en) | 2022-06-28 | 2022-06-28 | Unbalanced load protection structure and method for weighing fork |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115231476A CN115231476A (en) | 2022-10-25 |
| CN115231476B true CN115231476B (en) | 2024-01-09 |
Family
ID=83672130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210747610.2A Active CN115231476B (en) | 2022-06-28 | 2022-06-28 | Unbalanced load protection structure and method for weighing fork |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115231476B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115947273B (en) * | 2022-12-29 | 2023-08-08 | 深圳霸特尔防爆科技有限公司 | Automatic deviation-preventing lifting mechanism of explosion-proof storage battery forklift and method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012020814A (en) * | 2010-07-13 | 2012-02-02 | Yamato Scale Co Ltd | Forklift and device for measuring gravity center |
| CN107089622A (en) * | 2017-05-23 | 2017-08-25 | 安徽宇锋仓储设备有限公司 | Fork truck |
| JP2019189410A (en) * | 2018-04-26 | 2019-10-31 | 中西金属工業株式会社 | Forklift and method for measuring gravity center height of cargo loaded on fork of forklift |
| CN111707342A (en) * | 2020-05-29 | 2020-09-25 | 浙江华叉搬运设备有限公司 | Forklift load detection method and device |
| CN112816049A (en) * | 2020-12-28 | 2021-05-18 | 北京迈格威科技有限公司 | Unbalance loading detection method and device and carrying equipment |
| CN112811357A (en) * | 2021-02-10 | 2021-05-18 | 蚌埠日月仪器研究所有限公司 | Fork weighing device and fork truck freight weighing information acquisition method |
| CN218620200U (en) * | 2022-06-28 | 2023-03-14 | 浙江金华文瑞机电有限公司 | Weighing fork structure with unbalance loading protection function |
-
2022
- 2022-06-28 CN CN202210747610.2A patent/CN115231476B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012020814A (en) * | 2010-07-13 | 2012-02-02 | Yamato Scale Co Ltd | Forklift and device for measuring gravity center |
| CN107089622A (en) * | 2017-05-23 | 2017-08-25 | 安徽宇锋仓储设备有限公司 | Fork truck |
| JP2019189410A (en) * | 2018-04-26 | 2019-10-31 | 中西金属工業株式会社 | Forklift and method for measuring gravity center height of cargo loaded on fork of forklift |
| CN111707342A (en) * | 2020-05-29 | 2020-09-25 | 浙江华叉搬运设备有限公司 | Forklift load detection method and device |
| CN112816049A (en) * | 2020-12-28 | 2021-05-18 | 北京迈格威科技有限公司 | Unbalance loading detection method and device and carrying equipment |
| CN112811357A (en) * | 2021-02-10 | 2021-05-18 | 蚌埠日月仪器研究所有限公司 | Fork weighing device and fork truck freight weighing information acquisition method |
| CN218620200U (en) * | 2022-06-28 | 2023-03-14 | 浙江金华文瑞机电有限公司 | Weighing fork structure with unbalance loading protection function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115231476A (en) | 2022-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115231476B (en) | Unbalanced load protection structure and method for weighing fork | |
| US6050770A (en) | Stabilization system for load handling equipment | |
| CN201587769U (en) | Overload protecting device of construction hoist | |
| CN108137300B (en) | Forklift truck | |
| US20070041820A1 (en) | Fork cover having weighing capability | |
| EP2464593B1 (en) | Weighing scale for forklift | |
| US20140262551A1 (en) | Forklift scale, load cell and method of measuring a forklift load | |
| CN218620200U (en) | Weighing fork structure with unbalance loading protection function | |
| CA2939985C (en) | Forklift scale, load cell thereof and method of measuring a forklift load | |
| CN101780927A (en) | Tipping warning device of automobile crane | |
| CN111707342B (en) | Forklift load detection method and device | |
| CN112707338A (en) | Cargo carrying load bearing capacity detection system and method based on industrial forklift intellectualization | |
| CN107840289A (en) | A kind of fork truck maximum cargo lifting method for limiting and system | |
| CN216764090U (en) | Overweight detecting device | |
| CN110668370A (en) | Elevator with overweight alarming function | |
| CN213416175U (en) | Overload alarm device for preventing forklift from toppling | |
| CN214702480U (en) | Weighing module reaches weighing system including it | |
| JP2017019638A (en) | Derailment preventing method for freight car, and lateral turn preventing method for container | |
| CN111115516A (en) | Method for measuring forklift truck cargo carrying state through hydraulic device | |
| CN219991074U (en) | Fork truck arm with function of weighing | |
| CN215249429U (en) | Safety protection structure for hydraulic lifting platform | |
| CN116281759A (en) | Forklift safety detection system and forklift safety detection method | |
| CN220115373U (en) | Roadway stacker capable of preventing overweight | |
| CN219511721U (en) | Fork horizontal force detection device, fork force measurement device and fork safety detection device of fork truck | |
| CN112390196B (en) | Control system for safe lifting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |