High-precision lifting type weighing and conveying mechanism

Abstract

This utility model relates to the technical field of batching and weighing equipment, and discloses a high-precision lifting weighing and conveying mechanism, including a frame and a conveyor installed on the top of the frame. A weighing unit is arranged in the middle of the frame, and a linkage unit installed on the frame is connected below the weighing unit. The linkage unit is connected to a drive source installed at the bottom of the frame. The drive source drives the linkage unit to lift the weighing unit. A stop unit installed on the frame is arranged at one end of the conveyor. The stop unit can stop and release the material box conveyed on the conveyor. This utility model has the characteristics of high weighing accuracy and high production efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of batching and weighing equipment, and relates to a high-precision lifting weighing and conveying mechanism. Background Technology

[0002] Small-scale materials are essential core raw materials in industrial production, characterized by their small usage and decisive impact on the quality of the finished product. Small-scale material batching is the process of adding these key materials to the raw materials according to the formula designed by the formulator. This process can be divided into three categories: manual, semi-automatic, and fully automatic. In fully automatic batching processes, synchronous belt conveyors are frequently used. These conveyors are suitable for lightweight or medium-density materials such as granules, powders, and small lumps. They are characterized by their small size and simple structure, and are often used in space-constrained production lines, laboratories, and packaging workshops to achieve rapid and continuous material transport.

[0003] In fully automated batching of small materials, the conveyed materials are often weighed. If the materials are weighed during the conveying process of the synchronous belt conveyor, the weighing accuracy is poor, which will cause a large weighing error. If the material box on the synchronous belt conveyor is removed and weighed after the synchronous belt conveyor is stopped, it will affect the production efficiency. Therefore, there is an urgent need for a high-precision lifting weighing and conveying mechanism to solve the above problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a high-precision lifting weighing and conveying mechanism, which effectively solves the problems of large weighing errors during the conveying process and low production efficiency when removing the material box for weighing in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-precision lifting weighing and conveying mechanism, comprising a frame and a conveyor installed on the top of the frame, a weighing unit provided in the middle of the frame, a connecting rod unit installed on the frame connected below the weighing unit, and a drive source installed at the bottom of the frame connected to the connecting rod unit, the drive source driving the connecting rod unit to enable the weighing unit to lift. One end of the conveyor is provided with a stop unit mounted on the frame, which can stop and release the material box being conveyed on the conveyor.

[0006] Furthermore, the connecting rod unit includes a first shaft, a driving crank, a driven crank, and a crank connecting rod; there are two first shafts, arranged front and rear and rotatably connected to the frame; the driving crank and the driven crank are respectively fixed to the two first shafts at the front and rear; the lower ends of the driving crank and the driven crank are hinged to the crank connecting rod; and the upper ends of the driving crank and the driven crank are hinged to the weighing unit.

[0007] Furthermore, there are two of each of the active crank, passive crank, and crank connecting rod arranged in parallel; and there are two second shafts arranged in front and behind, one second shaft connected to the lower end of the active crank and the other second shaft connected to the lower end of the passive crank.

[0008] Furthermore, a support lug is provided on the bottom surface of the weighing unit, and the upper ends of both the passive crank and the active crank are hinged to the support lug.

[0009] Furthermore, a drive rod is provided at one end of the crank connecting rod connected to the driving crank, which is located between the two driving cranks. The drive rod is connected between the first shaft and the second shaft, and the end of the drive rod away from the first shaft is hinged to the drive source.

[0010] Furthermore, the stopping unit includes a bracket connected to the frame, a cylinder connected to the bottom surface of the bracket, and a support connected to the top surface of the bracket. A stopping block is rotatably connected to the support. A push rod that can pass through the bracket and the support is installed at the telescopic end of the cylinder. The cylinder can drive the push rod to drive the stopping block to rotate and release the material box.

[0011] Furthermore, a counterweight is integrally connected to the side of the stop block near the top rod. The counterweight can drive the stop block to rotate downwards and stop the stop block from blocking the material box. A roller is rotatably connected to the upper side of the stop block.

[0012] Furthermore, the weighing unit includes two parallel support plates, a weighing sensor installed between the two support plates, and a weighing plate installed on the upper side of the upper support plate.

[0013] Furthermore, the conveyor is one of a synchronous belt conveyor, a chain conveyor, or a roller conveyor.

[0014] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the linkage unit driven by the drive source enables the weighing unit to be raised and lowered. When the material box is transported above the weighing unit by the conveyor, the linkage unit lifts the weighing unit, allowing the weighing unit to weigh the material box and the small materials inside. This avoids interference from the conveyor during weighing and provides high weighing accuracy. Furthermore, after weighing, the linkage unit drives the weighing unit to descend, allowing the material box to fall back onto the conveyor for transport, avoiding the need to remove the material box for weighing and improving production efficiency. Therefore, this invention features high weighing accuracy and high production efficiency. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a perspective view of the present invention from another direction; Figure 3 This is a perspective view of the present invention from another direction; Figure 4 for Figure 1 Enlarged view of part A in the image; Figure 5 for Figure 3 Enlarged view of part B in the image.

[0016] In the diagram: 1. Frame; 2. Conveyor; 3. Weighing unit; 301. Support plate; 302. Weighing sensor; 303. Weighing plate; 304. Rubber block; 4. Stopping unit; 401. Bracket; 402. Support; 403. Stopping block; 404. Top rod; 405. Counterweight part; 406. Roller; 5. First shaft; 6. Active crank; 7. Passive crank; 8. Crank connecting rod; 9. Second shaft; 10. Support ear plate; 11. Drive rod; 12. Drive source. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 3 As shown, this utility model discloses a high-precision lifting weighing and conveying mechanism, including a frame 1 and a conveyor 2. The conveyor 2 can be selected from one of a synchronous belt conveyor, a chain conveyor, and a roller conveyor. The frame 1 is assembled from profiles, and its shape can be designed according to the needs of the scenario. In this embodiment, a synchronous belt conveyor is selected. Specifically, the synchronous belt conveyor includes two parallel profiles, which are connected to the frame 1 by connecting plates and bolts. Synchronous pulleys are installed at both ends of the profiles, and a synchronous belt is installed between the synchronous pulleys. One end of the synchronous pulley is connected by a synchronous shaft, and one end of the synchronous shaft is connected to a servo motor. The servo motor can drive the synchronous shaft to drive the synchronous pulley at one end to rotate, thereby enabling the synchronous belt to drive the material box for transportation. It also includes a weighing unit 3, a connecting rod unit, a stop unit 4, and a drive source 12; the weighing unit 3 is installed in the middle of the frame 1, the connecting rod unit is installed on the frame 1 and is located below the weighing unit 3, the drive source 12 is installed at the bottom of the frame 1 and connected to the connecting unit, and the stop unit 4 is installed on the frame 1 and located at one end of the conveyor 2. In this embodiment, the connecting rod unit includes a first shaft 5, a driving crank 6, a driven crank 7, and a crank connecting rod 8. There are two first shafts 5, arranged one in front of the other. Both ends of the first shafts 5 are connected to the frame 1 through bearing seats and bearing structures. The driving crank 6 and the driven crank 7 are L-shaped connecting rods. Holes are opened in the middle of the driving crank 6 and the driven crank 7. The first shafts 5 are inserted into the holes and fixedly connected to each other by welding or interference fit. The lower ends of the driving crank 6 and the driven crank 7 are hinged to the crank connecting rod 8, and the upper ends of the driving crank 6 and the driven crank 7 are hinged to the weighing unit 3. Furthermore, there are two parallel arrangements of the active crank 6, the passive crank 7, and the crank connecting rod 8, and two second shafts 9 arranged front and rear. One second shaft 9 is connected to the lower end of the active crank 6, and the other second shaft 9 is connected to the lower end of the passive crank 7. Correspondingly, the first shaft 5 and the second shaft 9 are arranged in parallel, so that the active crank 6, the passive crank 7, the crank connecting rod 8, the first shaft 5, and the second shaft 9 can form two parallel four-bar linkages that move synchronously. These linkages can synchronously support the four corners of the lower side of the weighing unit 3, improving the stability of the lifting and lowering of the weighing unit 3, and thus ensuring the stability and accuracy of the weighing. Specifically, a support lug 10 is integrally connected to the bottom surface of the weighing unit 3, and the upper ends of the passive crank 7 and the active crank 6 are hinged to the support lug 10. In this embodiment, a drive rod 11 is provided at one end of the crank connecting rod 8 connected to the active crank 6, located between the two active cranks 6. The drive rod 11 is connected between the first shaft 5 and the second shaft 9. Specifically, the drive rod 11 has a mounting hole through which both the first shaft 5 and the second shaft 9 pass. The end of the drive rod 11 facing away from the first shaft 5 is hinged to the drive source 12. The drive source 12 is a cylinder or an electric push rod, and the other end of the drive source 12 is hinged to the frame 1. The drive rod 11 enables the driving force of the drive source 12 to be located in the middle of the second shaft 9, ensuring the force balance of the parallel four-bar linkage formed above. Furthermore, there are two drive sources 12 and two drive rods 11, located at both ends of the second shaft 9, which not only ensures the strength of the applied force but also further ensures the balance of the applied force.

[0019] In this embodiment, as Figure 4As shown, the stopping unit 4 includes a bracket 401, a support 402, and a cylinder. The two ends of the bracket 401 are bolted to the frame 1. The cylinder is bolted to the bottom surface of the bracket 401, and the support 402 is bolted to the top surface of the bracket 401. A push rod 404, capable of passing through the bracket 401 and the support 402, is fixedly mounted on the cylinder's telescopic rod. Through holes for the push rod 404 are provided on the bracket 401 and the support 402. A stopping block 403 is rotatably connected to the support 402. Specifically, a counterweight 405 is integrally connected to the side of the stopping block 403 near the push rod 404. The counterweight 405 can drive the stop block 403 to rotate downwards and stop the material box. Initially, the push rod 404 does not push upwards, and the stop block 403 rotates under the action of the counterweight 405, so that the side of the stop block 403 away from the push rod 404 protrudes from the support 402 and stops the material box on the conveyor 2. After the weighing unit 3 weighs the material box, the weighing unit 3 puts the material box back on the conveyor 2 under the drive of the linkage unit. At this time, the cylinder drives the push rod 404 to lift up and push the stop block 403 to rotate, so that the stop block no longer contacts the material box, so that the conveyor 2 can continue to transport the material box.

[0020] Preferably, a roller 406 is rotatably connected to the upper side of the stop block 403. The roller 406 can facilitate the rotation of the stop block 403 and reduce frictional damage to the material box.

[0021] In this embodiment, as Figure 5 As shown, the weighing unit 3 includes two parallel support plates 301, a weighing sensor 302 installed between the two support plates 301, and a weighing plate 303 installed on the upper side of the upper support plate 301. Specifically, the weighing plate 303 is X-shaped, and a horizontal plate is bolted to the lower weighing plate 303. The support ear plate 10 is connected to the horizontal plate. This structure is simple and easy to manufacture. The weighing sensor 302 can be a digital high-precision weighing sensor with a weighing capacity of 500g-6000g.

[0022] In this embodiment, a plurality of rubber blocks 304 are installed on the upper side of the weighing plate 303, specifically four, which are distributed at the four corners of the weighing plate 303; the rubber blocks 304 can prevent the weighing plate 303 from wearing down the material box, and can also increase the friction between the weighing unit 3 and the material box when the material box is lifted, so as to prevent the material box from moving during the lifting process and improve the weighing accuracy.

[0023] In this embodiment, guide rods are connected to one side of both profiles of the synchronous belt conveyor. The guide rods guide the conveying of the material box to avoid large deviations of the material box. Both ends of the guide rods are outwardly flared to facilitate the introduction and export of the material box.

[0024] When using the above technical solution: the material box enters the conveyor 2 through the guide rod, and is stopped by the roller 406 of the stop block 403. Then, the drive source 12 pulls the active crank 6, causing the other end of the active crank 6 to rise. At the same time, under the linkage of the passive crank 7 and the crank connecting rod 8, the weighing unit 3 is lifted. The rubber block 304 on the weighing unit 3 supports the material box and lifts the material box away from the conveyor 2. The weighing sensor 302 in the weighing unit 3 completes the weighing of the material box at the same time. This avoids interference from the conveyor 2 in weighing, has high weighing accuracy, and also avoids removing the material box for weighing, thus improving production efficiency.

[0025] After weighing is completed, the drive source 12 pushes the active crank 6, causing the other end of the active crank 6 to descend. At the same time, under the linkage of the passive crank 7 and the crank connecting rod 8, the weighing unit 3 descends, and finally the material box is placed back on the synchronous belt of the conveyor 2, and the rubber block 304 also disengages from the bottom surface of the material box. The cylinder drives the push rod 404 to lift up, causing the counterweight part 405 of the stop block 403 to rise, and causing the roller 406 to rotate and lower below the bottom surface of the material box, so that the conveyor 2 continues to transport the material box.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-precision lifting type weighing conveying mechanism, comprising a frame (1) and a conveyor (2) installed on the top of the frame (1), characterized in that: A weighing unit (3) is provided in the middle of the frame (1). A linkage unit installed on the frame (1) is connected below the weighing unit (3). The linkage unit is connected to a drive source (12) installed at the bottom of the frame (1). The drive source (12) drives the linkage unit to make the weighing unit (3) move up and down. One end of the conveyor (2) is provided with a stop unit (4) installed on the frame (1), and the stop unit (4) can stop and release the material box conveyed on the conveyor (2).

2. The high precision lift and weigh conveyor mechanism of claim 1, wherein: The connecting rod unit includes a first shaft (5), an active crank (6), a passive crank (7), and a crank connecting rod (8); there are two first shafts (5) and they are rotatably connected to the frame (1) in front and behind. The active crank (6) and the passive crank (7) are respectively fixed on the two first shafts (5) in front and behind. The lower ends of the active crank (6) and the passive crank (7) are hinged to the crank connecting rod (8), and the upper ends of the active crank (6) and the passive crank (7) are hinged to the weighing unit (3).

3. The high precision lift and weigh conveyor mechanism of claim 2, wherein: The active crank (6), passive crank (7), and crank connecting rod (8) are all arranged in parallel with two of each other; and there are two second shafts (9) arranged in front and behind each other, one second shaft (9) is connected to the lower end of the active crank (6), and the other second shaft (9) is connected to the lower end of the passive crank (7).

4. A high precision lifting type weighing conveyor mechanism according to claim 2 or 3, characterized in that: The weighing unit (3) is provided with a support ear plate (10) on its bottom surface, and the upper ends of the passive crank (7) and the active crank (6) are both hinged to the support ear plate (10).

5. The high precision lift and weigh conveyor mechanism of claim 3, wherein: The crank connecting rod (8) is connected to the end of the active crank (6) and is provided with a drive rod (11) located between the two active cranks (6). The drive rod (11) is connected between the first shaft (5) and the second shaft (9). The end of the drive rod (11) away from the first shaft (5) is hinged to the drive source (12).

6. The high precision lift and weigh conveyor mechanism of claim 1, wherein: The stop unit (4) includes a bracket (401) connected to the frame (1), a cylinder connected to the bottom surface of the bracket (401), and a support (402) connected to the top surface of the bracket (401). A stop block (403) is rotatably connected to the support (402). A push rod (404) that can pass through the bracket (401) and the support (402) is installed on the telescopic end of the cylinder. The cylinder can drive the push rod (404) to drive the stop block (403) to rotate and release the material box.

7. The high precision lift and weigh conveyor mechanism of claim 6, wherein: The stop block (403) is integrally connected to a counterweight (405) on the side near the top rod (404). The counterweight (405) can drive the stop block (403) to rotate downward and stop the material box. A roller (406) is rotatably connected to the upper side of the stop block (403).

8. The high precision lift and weigh conveyor mechanism of claim 1, wherein: The weighing unit (3) includes two parallel support plates (301), a weighing sensor (302) installed between the two support plates (301), and a weighing plate (303) installed on the upper side of the upper support plate (301).

9. The high precision lift and weigh conveyor mechanism of claim 1, wherein: The conveyor (2) is one of the following: synchronous belt conveyor, chain conveyor, and roller conveyor.

Images