Laser device for forklift weighing discrimination

Abstract

The utility model relates to the technical field of weighing equipment, in particular to a laser device for forklift weighing discriminating.The laser device comprises a pallet fork body and a lifting device, the lifting device is connected with a forklift body and used for driving the pallet fork body to move up and down, and the pallet fork body comprises a first fixing plate; a first fixing plate is arranged on the outer portal frame, a laser range finder is arranged on the first fixing plate, a second fixing plate is arranged on the outer portal frame, a metal baffle capable of reflecting laser is arranged on the second fixing plate, and the position height of the pallet fork body is measured through the laser range finder when the pallet fork body moves up and down. By arranging the laser range finder on the pallet fork frame and arranging the metal baffle on the outer portal frame, the position height of the pallet fork body can be measured in real time, so that goods height information is obtained, the stress conditions of a forklift at different goods heights and under different working conditions are comprehensively considered, and compared with the prior art, the weighing deviation is effectively reduced, and the working efficiency is improved. And the cargo weighing accuracy is greatly improved.

Description

Technical Field

[0001] This application relates to the field of weighing equipment technology, and in particular to a laser device for weighing and judging forklifts. Background Technology

[0002] In industries such as logistics and warehousing, forklifts are indispensable equipment for handling goods, and accurately obtaining the weight information of the goods carried by the forklift is of great significance for operational safety, cargo management, and the rational use of equipment.

[0003] Traditional forklift weighing methods have many problems. On the one hand, some weighing equipment is complicated to install and requires significant modifications to the forklift structure, which not only affects the normal structural integrity of the forklift but may also reduce its operational flexibility. On the other hand, many current weighing methods based on pressure sensors are easily affected by factors such as uneven force and vibration on the forklift's own mechanical structure, resulting in unsatisfactory weighing accuracy.

[0004] Furthermore, most existing forklift weighing technologies neglect the crucial factor of cargo height. During forklift operations, the height of the cargo significantly impacts the weighing results. Because the force distribution varies when a forklift picks up cargo of different heights and shapes, existing weighing technologies cannot accurately measure cargo height. Consequently, they cannot accurately account for changes in the center of gravity and lever arm caused by height variations, leading to inaccurate weight calculations based on actual forces. For example, when cargo is taller, its center of gravity rises, resulting in a significantly different torque effect on the forks compared to cargo with a lower center of gravity. However, existing technologies do not consider this in their weighing calculations, leading to substantial errors in the results. As the logistics industry demands increasingly precise cargo handling, this inability to accurately measure cargo height, resulting in inaccurate weighing, severely impacts the efficiency and safety of forklift operations.

[0005] Therefore, a laser device for forklift weighing and identification is invented to solve the problems mentioned in the background art. Utility Model Content

[0006] In order to improve the weighing accuracy of current forklift equipment and measure the height of the picked-up goods, this application provides a laser device for forklift weighing and judgment.

[0007] This application provides a laser device for forklift weighing and identification, employing the following technical solution: It includes a fork body and a lifting device, wherein the lifting device is connected to the vehicle body and is used to move the fork body up and down. The fork body is mounted on the lifting device for transporting goods. The fork body includes a connecting frame connected to the output end of the lifting device. A fork carriage is mounted on the connecting frame, and a backrest is mounted on the fork carriage. A first fixed plate is mounted on the fork carriage, and a laser rangefinder is mounted on the first fixed plate. A second fixed plate is mounted on the outer mast, located at the top of the outer mast. A laser-reflective metal baffle is mounted on the second fixed plate. The laser rangefinder measures the position and height of the fork body as it moves up and down.

[0008] Optionally, the lifting device includes an outer mast, which is connected to the vehicle body, and a slidable inner mast is provided inside the outer mast. The connecting frame is fixedly connected to the inner mast on its corresponding side.

[0009] Optionally, a fixing block is provided on the inner gantry, and a rotatable sprocket is provided on the fixing block. A chain is wound on the sprocket. One end of the chain is connected to the fixing block and the other end is provided with a chain tension sensor. The chain tension sensor is fixed on the connecting frame. A hydraulic cylinder is fixedly provided on the outer gantry, and a hydraulic pressure sensor is provided at the output end of the hydraulic cylinder. The upper end of the hydraulic pressure sensor is fixedly connected to the fixing block.

[0010] In summary, this application includes the following beneficial technical effects:

[0011] 1. This device, by installing a laser rangefinder on the fork carriage and a metal baffle on the outer mast, can measure the position and height of the fork body in real time, thereby obtaining cargo height information. Combined with chain tension sensor and hydraulic pressure sensor, it comprehensively considers the force situation of the forklift under different cargo heights and working conditions. Compared with the existing technology, it overcomes the problem of ignoring factors such as changes in center of gravity and lever arm caused by the inability to measure cargo height, effectively reduces weighing deviation, and greatly improves the accuracy of cargo weighing.

[0012] 2. During forklift operation, as the forks are raised and lowered, the laser rangefinder measures their position and height in real time. At the same time, the chain tension sensor and hydraulic pressure sensor also work in real time. This multi-sensor collaborative working method can collect and process various data in real time, providing operators with comprehensive cargo information. This allows operators to keep abreast of cargo status and weight changes, ensuring safe and efficient operation.

[0013] 3. This device is designed based on the existing structure of the forklift. For example, the laser rangefinder is installed on the first fixed plate of the fork carriage, and the reflective baffle is installed on the second fixed plate of the outer mast. It makes reasonable use of the space of the forklift itself. The various sensors are organically integrated with the mechanical structure of the forklift. It will not cause major changes to the overall structure of the forklift. Moreover, the various parts work together, with a high degree of integration, and are easy to modify and implement on the basis of existing forklifts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the device. Figure I ;

[0015] Figure 2 This is a schematic diagram of the overall structure of the device. Figure II ;

[0016] Figure 3 This is the front view of the device;

[0017] Figure 4 This is a side view of the device;

[0018] Figure 5 This is a cross-sectional schematic diagram of the device;

[0019] The components include: 1. Fork body; 2. Lifting device; 3. Connecting frame; 4. Fork carriage; 5. Backrest; 6. First fixing plate; 7. Laser rangefinder; 8. Second fixing plate; 9. Metal baffle; 10. Outer mast; 11. Inner mast; 12. Fixing block; 13. Rotating sprocket; 14. Chain; 15. Chain tension sensor; 16. Hydraulic cylinder; 17. Hydraulic pressure sensor. Detailed Implementation

[0020] The present application will be further described in detail below with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0021] Reference Figure 1 , Figure 2One embodiment shown is as follows: it includes a fork body 1 and a lifting device 2, wherein the lifting device 2 is connected to the vehicle body and is used to drive the fork body 1 to move up and down. The fork body 1 is installed on the lifting device 2 for transporting goods. The fork body 1 includes a connecting frame 3, which is connected to the output end of the lifting device 2 and fixedly connected to the inner mast 11 on the corresponding side. A fork carriage 4 is fixedly connected to the connecting frame 3. A guard shelf 5 is fixedly connected to the fork carriage 4 by bolts. A first fixing plate 6 is fixedly connected to the fork carriage 4. A laser rangefinder 7 is fixedly connected to the first fixing plate 6. The laser rangefinder 7 is prior art, and its structure is not described in detail here. A second fixing plate 8 is fixedly connected to the outer mast 10. The second fixing plate 8 is located at the top of the outer mast 10. A metal baffle 9 that can reflect laser light is fixedly connected to the second fixing plate 8 by bolts. When the fork body 1 moves up and down, its position and height are measured by the laser rangefinder 7.

[0022] The lifting device 2 includes an outer mast 10, which is connected to the vehicle body. An inner mast 11 is slidably connected to the inner side of the outer mast 10, and the connecting frame 3 is fixedly connected to the inner mast 11 on its corresponding side.

[0023] Implementation principle: In the logistics warehouse, when the forklift starts working, the outer mast 10 of the lifting device 2 is stably connected to the vehicle body, providing support for the entire device. The inner mast 11 can slide smoothly inside the outer mast 10. When the operator operates the forklift to pick up goods, the lifting device 2 is activated, and the inner mast 11 moves up and down according to the command. The connecting frame 3 of the fork body 1 is fixedly connected to the inner mast 11 and moves with the inner mast 11. Goods are placed on the fork carriage 4, and the guardrail 5 effectively prevents the goods from slipping during picking and transportation, ensuring the stability of the goods on the forks.

[0024] When the forklift is in operation, the fork body 1 moves up and down under the action of the lifting device 2. The laser rangefinder 7 on the fork carriage 4 emits a laser to the metal baffle 9 installed on the second fixed plate 8 of the outer mast 10. After the laser encounters the metal baffle 9, it is reflected back to the laser rangefinder 7. Based on the propagation speed of the laser in the air and the time difference between the laser's round trip, the distance between the fork body 1 and the metal baffle 9 is calculated, which is the height information of the fork. Since the laser has high directionality and stability, this measurement method can accurately obtain the fork height data in the complex operating environment of the forklift.

[0025] Reference Figure 1 , Figure 2One embodiment shown is as follows: a fixing block 12 is fixedly connected to the inner mast 11, a rotatable rotating sprocket 13 is rotatably connected to the fixing block 12, a chain 14 is wound around the rotating sprocket 13, one end of the chain 14 is fixedly connected to the fixing block 12 and the other end is fixedly connected to a chain tension sensor 15, the chain tension sensor 15 is fixed on the connecting frame 3, a hydraulic cylinder 16 is fixedly connected to the outer mast 10, a hydraulic pressure sensor 17 is fixedly connected to the output end of the hydraulic cylinder 16, and the upper end of the hydraulic pressure sensor 17 is fixedly connected to the fixing block 12;

[0026] Implementation principle: When goods are placed on the forks, their weight is transmitted to the chain 14 through the forks, connecting frame 3, etc. When the forklift moves or raises or lowers the forks, the chain tension sensor 15 measures the change in tension on the chain 14 in real time. For example, when the forklift picks up a heavier load and lifts it, the chain 14 experiences a greater tension. The chain tension sensor 15 can accurately sense this increase in tension and convert it into a corresponding signal. During the forklift's transport of goods, when encountering bumps or turns, the tension of the chain 14 will fluctuate, and the sensor can accurately measure these changes. The hydraulic cylinder 16 plays an important role in the forklift's operation. When supporting the lifting and lowering of the inner mast 11 and bearing the weight of the goods, the hydraulic pressure sensor 17 measures the hydraulic pressure changes in the cylinder in real time. When the forklift picks up goods and starts the lifting device 2, the pressure in the hydraulic cylinder 16 increases with the increase in the weight of the goods, and the hydraulic pressure sensor 17 accurately captures this pressure change.

[0027] The working principle of this device is as follows: During normal forklift operation, the lifting device 2 drives the fork body 1 to move up and down. The laser rangefinder 7 on the fork carriage 4 continuously emits laser light towards the metal baffle 9 and receives the reflected laser light, measuring the height change of the forks in real time and transmitting this height information to the control system. At the same time, the chain tension sensor 15 measures the tension change of the chain 14 in real time, and the hydraulic pressure sensor 17 measures the pressure change in the hydraulic cylinder 16 in real time. They also transmit the force information they measure to the control system. The control system processes this data according to the pre-stored forklift parameters and the algorithm based on mechanical principles. By combining the laser rangefinder data with the chain tension data and hydraulic pressure data, and substituting them into the weighing calculation mathematical model, the weight of the goods is calculated. The operator can view the weight information of the goods through the display device in the forklift cab. When the calculated weight of the goods exceeds the rated load capacity of the forklift or reaches the preset safety threshold, the control system triggers the alarm device and issues an audible and visual alarm signal to remind the operator to pay attention to operational safety and ensure that the forklift operates within a safe load range.

[0028] The working principle of this device has been explained through the above embodiments. These embodiments merely illustrate several implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A laser device for forklift weighing and judgment, comprising a fork body (1) and a lifting device (2), characterized in that: The lifting device (2) is connected to the vehicle body. The lifting device (2) is used to drive the fork body (1) to move up and down. The fork body (1) is set on the lifting device (2) and is used to transport goods. The fork body (1) includes a connecting frame (3). The connecting frame (3) is connected to the output end of the lifting device (2). A fork carriage (4) is set on the connecting frame (3). A backrest (5) is set on the fork carriage (4). A first fixing plate (6) is set on the fork carriage (4). A laser rangefinder (7) is set on the first fixing plate (6). The lifting device (2) includes an outer mast (10), which is connected to the vehicle body. A slidable inner mast (11) is provided inside the outer mast (10). The connecting frame (3) is fixedly connected to the inner mast (11) on its corresponding side. A second fixing plate (8) is provided on the outer mast (10). The second fixing plate (8) is located on the top of the outer mast (10). A metal baffle (9) that can reflect laser is provided on the second fixing plate (8). When the fork body (1) moves up and down, its position and height are measured by a laser rangefinder (7).

2. The laser device for forklift weighing and identification according to claim 1, characterized in that: A fixing block (12) is provided on the inner gantry (11), and a rotatable rotating sprocket (13) is provided on the fixing block (12). A chain (14) is wound on the rotating sprocket (13). One end of the chain (14) is connected to the fixing block (12), and the other end is provided with a chain tension sensor (15). The chain tension sensor (15) is fixed on the connecting frame (3). A hydraulic cylinder (16) is fixedly provided on the outer gantry (10). A hydraulic pressure sensor (17) is provided at the output end of the hydraulic cylinder (16). The upper end of the hydraulic pressure sensor (17) is fixedly connected to the fixing block (12).

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