A precision-feeding concrete batching machine

Abstract

This invention discloses a concrete batching machine for precise material feeding, relating to the technical field of batching devices. The invention includes a base plate with a fixed box on its top surface. A weighing device is fixed inside the fixed box. By activating a cylinder, a slider slides within a groove, while a rotating plate drives a rotating rod to rotate within the fixed box. When the convex part of the cam faces the mixing drum, one side of the weighing frame rotates to the bottom of the cam, allowing the batching material in the weighing frame to be conveyed from the connecting pipe into the mixing drum. This eliminates the need for manual pouring after weighing, reducing the labor intensity of workers. During the pouring process, a motor is activated, causing the drive wheel to rotate the belt, which in turn rotates the driven wheel. This causes the rotating shaft to drive the cam to strike the rubber strip on one side of the weighing frame, ensuring the batching material is completely conveyed into the mixing drum.

Description

Technical Field

[0001] The present invention relates to the technical field of batching devices, and particularly to a concrete batching machine with precise feeding. Background Art

[0002] Concrete, simply referred to as "砼", is a general term for engineering composite materials in which aggregate is cemented into a whole by a gelling material. Usually, the term "concrete" refers to cement concrete, also known as ordinary concrete, which is made of cement as the gelling material, sand and stone as aggregates, and is mixed with water (which may contain additives and admixtures) in a certain proportion and stirred. It is widely used in civil engineering.

[0003] Currently, when batching concrete, generally after weighing the batching, it is manually poured into the mixing device. During the pouring and feeding process, it is easy for the batching to fall off, resulting in waste of the batching, and during the pouring process, the labor intensity of the staff is relatively high. In view of the above problems, the inventor proposes a concrete batching machine with precise feeding to solve the above problems. Summary of the Invention

[0004] In order to solve the problems that generally after weighing the batching, it is manually poured into the mixing device, during the pouring and feeding process, it is easy for the batching to fall off, resulting in waste of the batching, and during the pouring process, the labor intensity of the staff is relatively high; the purpose of the present invention is to provide a concrete batching machine with precise feeding.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a concrete batching machine for precise material feeding, comprising a base plate, a fixed box fixedly mounted on the top surface of the base plate, a weighing device fixedly mounted inside the fixed box, the weighing device comprising a mounting plate fixedly mounted inside the fixed box, a rotating plate rotatably mounted on the top of the mounting plate inside the fixed box, an electronic scale fixedly mounted on the top surface of the rotating plate, a weighing frame fixedly mounted on the top surface of the electronic scale, a display fixedly mounted on one side of the fixed box, a cylinder mounted on the top surface of the mounting plate, a slider fixedly mounted on the output end of the cylinder, a groove formed on the bottom surface of the rotating plate, the slider slidingly mounted in the groove, a rotating rod rotatably connected inside the fixed box, the rotating rod fixedly passing through the rotating plate, a rubber strip fixedly mounted on one side of the weighing frame, and inclined plates symmetrically arranged inside the weighing frame;A transmission device is fixedly installed on the top surface of the base plate. The transmission device includes a column, a motor is fixedly installed on the top surface of the column, a drive wheel is fixedly sleeved on the outer surface of the motor output end, a rotating shaft is rotatably inserted into the fixed box, cams are fixedly sleeved on the outer surface of the rotating shaft at equal intervals, a driven wheel is fixedly sleeved on the outer surface of one end of the rotating shaft, and a belt is connected between the drive wheel and the driven wheel. First, by pouring the ingredients into the top surface of the sealing door, the sealing door can rotate downwards under the action of gravity. Then, the first fixed ear drives the connecting rod to rotate, and at the same time, the other end of the connecting rod can rotate in the second fixed ear, and so on. The connecting block compresses the buffer spring, thereby opening the sealing door and allowing the ingredients to be conveyed into the weighing frame for processing. The buffer spring then returns to its original position, closing the sealing door again to prevent falling ingredient dust from dispersing into the air and being inhaled by workers, thus protecting their health. The ingredients are then weighed using an electronic scale electrically connected to a display screen, allowing workers to monitor the accurate weight and ensure precise ingredient addition, avoiding errors in proportion that could degrade concrete quality. Activating the cylinder causes the slider to slide along the chute. Inside, the rotating plate simultaneously drives the rotating rod to rotate within the fixed box. When the convex part of the cam faces the mixing tank, one side of the weighing frame rotates to the bottom surface of the cam, allowing the ingredients inside the weighing frame to be conveyed from the connecting pipe into the mixing tank. This eliminates the need for manual pouring after weighing, reducing the labor intensity of the workers. During the pouring process, the motor is turned on, causing the drive wheel to drive the belt to rotate, which in turn drives the driven wheel to rotate. This causes the rotating shaft to drive the cam to strike the rubber strip on one side of the weighing frame, ensuring that the ingredients are completely conveyed into the mixing tank. When the last ingredient is added... During material conveying, the cam is observed through the observation window. When the motor is turned on, the cam rotates slowly. When the cam's protruding part rotates to the top, it stops working. Then, when the weighing frame rotates to one side of the cam and stops, the batching material is poured and conveyed. The lever can move within the arc-shaped groove, causing the inclined block to move the lever plate. The lever plate slides on the outside of the insert rod, simultaneously pulling the return spring to deform, which in turn pushes the auxiliary block into the groove. Thus, while the last batching material is poured, the mixing rod mixes and blends the materials in the mixing tank, making the concrete ready for processing. Then, the solenoid valve is opened, allowing the blended concrete to flow out from the discharge pipe.

[0006] Preferably, a stirring device is fixedly provided on the top surface of the base plate. The stirring device includes a stirring tank, a drive shaft is rotatably inserted inside the stirring tank, and mounting blocks are fixedly sleeved on the outer surface of the drive shaft at equal intervals. Stirring rods are fixedly provided on all four sides of the mounting blocks. A connecting pipe is fixedly connected between the fixed box and the stirring tank. The drive shaft is rotatably inserted into a drive wheel. An auxiliary block is movably provided on the outer surface of the drive shaft. A rotating component is rotatably provided inside the auxiliary block and rotatably sleeved on the outer surface of the drive shaft. A groove is formed inside the drive wheel, and the auxiliary block is movably disposed within the groove. A rod is fixedly provided on one side of the fixed box, and a lever is movably sleeved on the outer surface of the rod. The fixed box and... A return spring is fixedly connected between the levers. One end of the lever is movably sleeved on the outer surface of the drive shaft. The lever is fixedly connected to the rotating part. When the last batch of ingredients is conveyed, the cam is observed through the observation window. When the motor is turned on, the cam rotates slowly. When the convex part of the cam rotates to the top, it stops working. Then, when the weighing frame rotates to one side of the cam, it stops, and then the batch of ingredients is poured and conveyed. The lever can move in the arc groove, so that the inclined block moves the lever. The lever slides on the outside of the insert rod, and at the same time, it pulls the return spring to deform, and then pushes the auxiliary block to insert into the groove. Thus, while the last batch of ingredients is poured, the stirring rod stirs and blends the ingredients in the mixing bucket, so that the concrete can be processed.

[0007] Preferably, an observation window is installed on one side of the fixed box, an arc-shaped groove is opened inside the fixed box, a lever is fixedly installed on the side of the weighing frame near the arc-shaped groove, the lever is movably installed in the arc-shaped groove, an inclined block is fixedly installed at the other end of the lever, a discharge pipe is fixedly installed on one side of the mixing tank, and a solenoid valve is rotatably connected to the outer surface of the discharge pipe.

[0008] Preferably, a sealing door is hinged inside the fixed box. A first fixing ear is fixedly provided on the bottom surface of the sealing door. A connecting rod is rotatably connected inside the first fixing ear. Four connecting blocks arranged in a rectangular pattern are slidably arranged inside the fixed box. A second fixing ear is fixedly provided on one side of each of the four connecting blocks. The other end of the connecting rod is rotatably inserted into the second fixing ear. Four guide grooves arranged in a rectangular pattern are opened inside the fixed box. A guide block is fixedly provided on one side of each of the four connecting blocks. The guide block is slidably disposed in the guide groove. Four fixed blocks arranged in a rectangular pattern are fixedly provided inside the fixed box. A buffer spring is fixedly connected between the connecting blocks and the fixing blocks. When the ingredients are poured into the top surface of the sealing door, the sealing door can rotate downwards under the action of gravity. This causes the first fixing ear to drive the connecting rod to rotate. At the same time, the other end of the connecting rod can rotate into the second fixing ear, causing the connecting block to squeeze the buffer spring, thereby opening the sealing door and allowing the ingredients to be transported into the weighing frame for weighing. Then, the buffer spring can return to its original position, causing the sealing door to close again, preventing the falling ingredients and dust from being dispersed into the air and inhaled by workers, thus affecting their health.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] 1. By opening the cylinder, the slider slides in the groove, and the rotating plate drives the rotating rod to rotate in the fixed box. When the convex part of the cam faces the mixing tank, one side of the weighing frame rotates to the bottom surface of the cam, so that the ingredients in the weighing frame can be transported from the connecting pipe to the mixing tank. After weighing, the ingredients can be fed and transported without manual dumping, reducing the labor intensity of the workers. During the dumping process, the motor is turned on, so that the drive wheel drives the belt to rotate, which in turn drives the driven wheel to rotate. This causes the rotating shaft to drive the cam to strike the rubber strip on one side of the weighing frame. During the striking process, the ingredients can be completely transported into the mixing tank.

[0011] 2. When conveying the last ingredient, observe the cam through the observation window. When the motor is turned on, the cam rotates slowly. When the cam's protruding part rotates to the top, it stops working. Then, when the weighing frame rotates to one side of the cam, it stops, and the ingredients are poured and conveyed. The lever can move in the arc groove, which causes the inclined block to move the lever plate. The lever plate slides on the outside of the insert rod, and at the same time, it pulls the return spring to deform, which in turn pushes the auxiliary block to insert into the groove. Thus, while the last ingredient is poured, the stirring rod stirs and blends the ingredients in the mixing tank, making the concrete processable.

[0012] 3. By pouring the ingredients into the top surface of the sealed door, the sealed door can rotate downwards under the action of gravity. This causes the first fixed ear to drive the connecting rod to rotate, while the other end of the connecting rod can rotate into the second fixed ear, causing the connecting block to squeeze the buffer spring. This opens the sealed door, allowing the ingredients to be transported into the weighing frame for weighing. Then, the buffer spring can return to its original position, causing the sealed door to close again. This prevents the falling ingredients and dust from being dispersed in the air and inhaled by workers, thus affecting their health. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a partial cross-sectional view of the fixing box of the present invention.

[0016] Figure 3 This is a schematic diagram of the weighing device of the present invention.

[0017] Figure 4 This is a schematic diagram of the weighing frame structure of the present invention.

[0018] Figure 5 This is a schematic diagram of the transmission device structure of the present invention.

[0019] Figure 6 This is a schematic diagram of the mixing tank structure of the present invention.

[0020] Figure 7 This is a schematic diagram of the stirring device of the present invention.

[0021] Figure 8 This is a schematic diagram of the split structure of the drive shaft of the present invention.

[0022] Figure 9 For the present invention Figure 2 Enlarged structural diagram at point A in the middle.

[0023] In the diagram: 1. Base plate; 2. Weighing device; 3. Transmission device; 4. Stirring device; 11. Fixed box; 111. Guide groove; 112. Arc groove; 113. Observation window; 12. Sealing door; 13. First fixing ear; 14. Connecting rod; 15. Second fixing ear; 16. Connecting block; 17. Guide block; 18. Buffer spring; 19. Fixed block; 21. Mounting plate; 22. Cylinder; 23. Sliding block; 24. Rotating plate; 241. Slide groove; 25. Rotating rod; 26. Electronic scale; 261. Display 27. Indicator; 28. Weighing frame; 29. ​​Lever; 20. Inclined block; 21. Inclined plate; 22. Rubber strip; 33. Column; 34. Motor; 35. Drive wheel; 36. Groove; 37. Belt; 48. Shaft; 49. Driven wheel; 40. Cam; 41. Mixing tank; 42. Connecting pipe; 43. Drive shaft; 44. Mounting block; 45. Mixing rod; 46. Discharge pipe; 47. Solenoid valve; 48. Lever; 481. Insert rod; 482. Return spring; 49. Auxiliary block; 491. Rotating component. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] like Figure 1-9As shown, this invention provides a concrete batching machine for precise material feeding, including a base plate 1. A fixed box 11 is fixedly mounted on the top surface of the base plate 1. A weighing device 2 is fixedly mounted inside the fixed box 11. The weighing device 2 includes a mounting plate 21, which is fixedly mounted inside the fixed box 11. A rotating plate 24 is rotatably mounted on the top of the mounting plate 21 inside the fixed box 11. An electronic scale 26 is fixedly mounted on the top surface of the rotating plate 24. A weighing frame 27 is fixedly mounted on the top surface of the electronic scale 26. A display 261 is fixedly mounted on one side of the fixed box 11. A cylinder 22 is mounted on the top surface of the mounting plate 21. A slider 23 is fixedly mounted on the output end of the cylinder 22. A groove 241 is opened on the bottom surface of the rotating plate 24. The slider 23 slides in the groove 241. A rotating rod 25 is rotatably connected inside the fixed box 11 and is fixedly inserted through the rotating plate 24. A rubber strip 291 is fixedly mounted on one side of the weighing frame 27. The weighing frame 27 is symmetrically equipped with inclined plates 29. The ingredients are input into the weighing frame 27 and then weighed by an electronic scale 26. The electronic scale 26 is electrically connected to the display 261, so that the weight can be displayed on the display 261. This allows the staff to observe the actual weight of the ingredients and ensure that the ingredients can be accurately added, avoiding errors in the proportion and causing a decrease in concrete quality. By opening the cylinder 22, the slider 23 slides in the chute 241. At the same time, the rotating plate 24 drives the rotating rod 25 to rotate in the fixed box 11. When the protruding part of the cam 37 faces the mixing tank 41, one side of the weighing frame 27 rotates to the bottom surface of the cam 37, so that the ingredients in the weighing frame 27 can be transported from the connecting pipe 42 to the mixing tank 41. This allows the ingredients to be fed and transported after weighing without manual dumping, reducing the labor intensity of the staff.

[0026] A transmission device 3 is fixedly installed on the top surface of the base plate 1. The transmission device 3 includes a column 31, a motor 32 is fixedly installed on the top surface of the column 31, a drive wheel 33 is fixedly sleeved on the outer surface of the output end of the motor 32, a rotating shaft 35 is rotatably inserted in the fixed box 11, a cam 37 is fixedly sleeved on the outer surface of the rotating shaft 35 at equal intervals, a driven wheel 36 is fixedly sleeved on the outer surface of one end of the rotating shaft 35, and a belt 34 is connected between the drive wheel 33 and the driven wheel 36. During the process of pouring the ingredients, the motor 32 is turned on, so that the drive wheel 33 drives the belt 34 to rotate, and at the same time drives the driven wheel 36 to rotate, so that the rotating shaft 35 drives the cam 37 to strike the rubber strip 291 on one side of the symmetrical frame 27. During the striking process, the ingredients can be completely transported into the mixing tank 41.

[0027] A stirring device 4 is fixedly installed on the top surface of the base plate 1. The stirring device 4 includes a stirring tank 41. A drive shaft 43 is rotatably inserted inside the stirring tank 41. Mounting blocks 44 are fixedly fitted on the outer surface of the drive shaft 43 at equal intervals. Stirring rods 45 are fixedly installed on the four sides of the mounting blocks 44. A connecting pipe 42 is fixedly connected between the fixed box 11 and the stirring tank 41. The drive shaft 43 is rotatably inserted inside the drive wheel 33. An auxiliary block 49 is movably installed on the outer surface of the drive shaft 43. A rotating component 491 is rotatably installed inside the auxiliary block 49 and is rotatably fitted on the outer surface of the drive shaft 43. A groove 331 is opened inside the drive wheel 33. The auxiliary block 49 is movably installed in the groove 331. The fixed box 1 A rod 481 is fixedly provided on one side of the fixed box 11. A lever 48 is movably sleeved on the outer surface of the rod 481. A return spring 482 is fixedly connected between the fixed box 11 and the lever 48. One end of the lever 48 is movably sleeved on the outer surface of the drive shaft 43. The lever 48 is fixedly connected to the rotating part 491. An observation window 113 is installed on one side of the fixed box 11. An arc groove 112 is opened inside the fixed box 11. A lever 28 is fixedly provided on the side of the weighing frame 27 near the arc groove 112. The lever 28 is movably disposed in the arc groove 112. An inclined block 281 is fixedly provided on the other end of the lever 28. A discharge pipe 46 is fixedly provided on one side of the mixing tank 41. A solenoid valve 47 is rotatably connected to the outer surface of the discharge pipe 46.

[0028] By adopting the above technical solution, when the last ingredient is conveyed, the cam 37 is observed through the observation window 113. When the motor 32 is turned on, the cam 37 rotates slowly. When the convex part of the cam 37 rotates to the top, it stops working. Then, when the weighing frame 27 rotates to one side of the cam 37, it stops, and then the ingredients are poured and conveyed. The lever 28 can move in the arc groove 112, so that the inclined block 281 moves the lever 48. The lever 48 slides on the outside of the insert rod 481, and at the same time pulls the return spring 482 to deform, thereby pushing the auxiliary block 49 to insert into the groove 331. Thus, while the last ingredient is poured, the stirring rod 45 stirs and blends the ingredients in the mixing tank 41, so that the concrete can be processed.

[0029] A sealing door 12 is hinged inside the fixed box 11. A first fixing ear 13 is fixedly provided on the bottom surface of the sealing door 12. A connecting rod 14 is rotatably connected inside the first fixing ear 13. Four connecting blocks 16 arranged in a rectangular pattern are slidably provided inside the fixed box 11. A second fixing ear 15 is fixedly provided on one side of each of the four connecting blocks 16. The other end of the connecting rod 14 is rotatably inserted into the second fixing ear 15. Four guide grooves 111 arranged in a rectangular pattern are provided inside the fixed box 11. A guide block 17 is fixedly provided on one side of each of the four connecting blocks 16. The guide block 17 is slidably provided in the guide groove 111. Four fixing blocks 19 arranged in a rectangular pattern are fixedly provided inside the fixed box 11. A buffer spring 18 is fixedly connected between the connecting block 16 and the fixing block 19.

[0030] By adopting the above technical solution, when the ingredients are poured into the top surface of the sealing door 12, the sealing door 12 can rotate downwards under the action of gravity. This causes the first fixing ear 13 to drive the connecting rod 14 to rotate, while the other end of the connecting rod 14 can rotate into the second fixing ear 15, causing the connecting block 16 to squeeze the buffer spring 18. This opens the sealing door 12, allowing the ingredients to be transported into the weighing frame 27 for weighing. Then, the buffer spring 18 can reset, causing the sealing door 12 to close again, preventing the falling ingredients and dust from being dispersed in the air and inhaled by workers, thus affecting their health.

[0031] Working principle: First, by pouring the ingredients into the top surface of the sealing door 12, the sealing door 12 rotates downwards under the action of gravity. This causes the first fixing lug 13 to drive the connecting rod 14 to rotate, while the other end of the connecting rod 14 rotates into the second fixing lug 15, causing the connecting block 16 to compress the buffer spring 18. This opens the sealing door 12, allowing the ingredients to be conveyed into the weighing frame 27 for weighing. Then, the buffer spring 18 returns to its original position, closing the sealing door 12 again. This prevents the falling ingredient dust from being dispersed into the air and inhaled by workers, thus protecting their health. The process is then controlled by the electronic scale 2. 6. The ingredients are weighed. The electronic scale 26 is electrically connected to the display 261, so that the weight can be displayed on the display 261. This allows the staff to observe the actual weight of the ingredients, ensuring accurate feeding and avoiding errors in the proportions that could lead to a decrease in concrete quality. By activating the cylinder 22, the slider 23 slides into the chute 241. At the same time, the rotating plate 24 drives the rotating rod 25 to rotate within the fixed box 11. When the protruding part of the cam 37 faces the mixing tank 41, one side of the weighing frame 27 rotates to the bottom surface of the cam 37, thereby allowing the ingredients in the weighing frame 27 to be transported from the connecting pipe 42 to the mixing tank 41. Inside the mixing tank 41, the ingredients are fed and conveyed after weighing, eliminating the need for manual pouring and reducing the labor intensity of the workers. During the pouring process, the motor 32 is turned on, causing the drive wheel 33 to drive the belt 34 to rotate, which in turn drives the driven wheel 36 to rotate. This causes the rotating shaft 35 to drive the cam 37 to strike the rubber strip 291 on one side of the symmetrical weight frame 27. During the striking process, the ingredients are completely conveyed into the mixing tank 41. When conveying the last ingredient, the cam 37 is observed through the observation window 113. When the motor 32 is turned on, the cam 37 rotates slowly, and the cam 37's protrusion... When the part rotates to the top, the operation stops. Then, when the weighing frame 27 rotates to one side of the cam 37 and stops, the ingredients are poured and conveyed. The lever 28 can move in the arc groove 112, so that the inclined block 281 moves the lever 48. The lever 48 slides on the surface of the insert rod 481 and pulls the return spring 482 to deform, thereby pushing the auxiliary block 49 into the groove 331. Thus, while the last ingredient is poured, the stirring rod 45 stirs and blends the ingredients in the mixing tank 41, so that the concrete can be processed. Then, the solenoid valve 47 is opened, so that the blended concrete flows out from the discharge pipe 46.

[0032] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A precision concrete batching machine, comprising a base plate (1), characterized in that: A fixed box (11) is fixedly provided on the top surface of the base plate (1). A weighing device (2) is fixedly provided inside the fixed box (11). The weighing device (2) includes a mounting plate (21). The mounting plate (21) is fixedly installed inside the fixed box (11). A rotating plate (24) is rotatably provided at the top of the mounting plate (21) inside the fixed box (11). An electronic scale (26) is fixedly provided on the top surface of the rotating plate (24). A weighing frame (27) is fixedly provided on the top surface of the electronic scale (26). A display (261) is fixedly provided on one side of the fixed box (11). A transmission device (3) is fixedly provided on the top surface of the base plate (1). The transmission device (3) includes a column (31). A motor (32) is fixedly provided on the top surface of the column (31). A drive wheel (33) is fixedly sleeved on the outer surface of the output end of the motor (32). A rotating shaft (35) is rotatably inserted in the fixed box (11). Cams (37) are fixedly sleeved on the outer surface of the rotating shaft (35) at equal intervals. A driven wheel (36) is fixedly sleeved on the outer surface of one end of the rotating shaft (35). A belt (34) is connected between the drive wheel (33) and the driven wheel (36).

2. The concrete batching machine for precise material feeding as described in claim 1, characterized in that, A stirring device (4) is fixedly provided on the top surface of the base plate (1). The stirring device (4) includes a stirring tank (41). A drive shaft (43) is rotatably inserted inside the stirring tank (41). Mounting blocks (44) are fixedly sleeved on the outer surface of the drive shaft (43) at equal intervals. Stirring rods (45) are fixedly provided on the four sides of the mounting blocks (44). A connecting pipe (42) is fixedly connected between the fixed box (11) and the stirring tank (41).

3. A concrete batching machine for precise material feeding as described in claim 2, characterized in that, The drive shaft (43) is rotatably inserted into the drive wheel (33). An auxiliary block (49) is movably provided on the outer surface of the drive shaft (43). A rotating component (491) is rotatably provided inside the auxiliary block (49). The rotating component (491) is rotatably sleeved on the outer surface of the drive shaft (43). A groove (331) is provided inside the drive wheel (33). The auxiliary block (49) is movably provided in the groove (331).

4. A concrete batching machine for precise material feeding as described in claim 3, characterized in that, A rod (481) is fixedly provided on one side of the fixed box (11). A lever (48) is movably sleeved on the outer surface of the rod (481). A return spring (482) is fixedly connected between the fixed box (11) and the lever (48). One end of the lever (48) is movably sleeved on the outer surface of the drive shaft (43). The lever (48) is fixedly connected to the rotating part (491).

5. A concrete batching machine for precise material feeding as described in claim 1, characterized in that, A cylinder (22) is installed on the top surface of the mounting plate (21). A slider (23) is fixedly provided at the output end of the cylinder (22). A groove (241) is provided on the bottom surface of the rotating plate (24). The slider (23) is slidably disposed in the groove (241). A rotating rod (25) is rotatably connected in the fixed box (11). The rotating rod (25) is fixedly disposed through the rotating plate (24).

6. A concrete batching machine for precise material feeding as described in claim 1, characterized in that, A rubber strip (291) is fixedly provided on one side of the weighing frame (27), and inclined plates (29) are symmetrically provided inside the weighing frame (27).

7. A concrete batching machine for precise material feeding as described in claim 1, characterized in that, An observation window (113) is installed on one side of the fixed box (11). An arc-shaped groove (112) is opened inside the fixed box (11). A lever (28) is fixedly provided on the side of the weighing frame (27) near the arc-shaped groove (112). The lever (28) is movably disposed in the arc-shaped groove (112). An inclined block (281) is fixedly provided at the other end of the lever (28).

8. A concrete batching machine for precise material feeding as described in claim 2, characterized in that, A discharge pipe (46) is fixedly provided on one side of the mixing tank (41), and a solenoid valve (47) is rotatably connected to the outer surface of the discharge pipe (46).

9. A concrete batching machine for precise material feeding as described in claim 1, characterized in that, The fixed box (11) is hinged with a sealing door (12). The bottom surface of the sealing door (12) is fixed with a first fixing ear (13). A connecting rod (14) is rotatably connected inside the first fixing ear (13). Four connecting blocks (16) arranged in a rectangular shape are slidably arranged inside the fixed box (11). A second fixing ear (15) is fixed on one side of the four connecting blocks (16). The other end of the connecting rod (14) is rotatably inserted into the second fixing ear (15).

10. A concrete batching machine for precise material feeding as described in claim 9, characterized in that, The fixed box (11) has four guide grooves (111) arranged in a rectangular shape. Each of the four connecting blocks (16) has a guide block (17) fixed on one side. The guide block (17) is slidably disposed in the guide groove (111). The fixed box (11) has four fixed blocks (19) arranged in a rectangular shape. A buffer spring (18) is fixedly connected between the connecting block (16) and the fixed block (19).

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