Small-dose weighing and packaging device for traditional Chinese medicine decoction pieces

Abstract

The invention relates to the related technical field of packaging devices, in particular to a traditional Chinese medicine decoction piece small-dose weighing and packaging device which comprises a base, a weighing bin, a weighing structure and a material blocking structure, a first-stage support and a second-stage support are fixedly installed on the base, an installation beam is fixedly installed at the upper side end of the second-stage support, a packaging bottle conveying belt is installed on the base, and a packaging bottle conveying belt is installed on the packaging bottle conveying belt. The weighing bin is fixed to the first-stage support, a hopper is arranged at an opening in the upper end of the weighing bin and used for feeding traditional Chinese medicine decoction pieces, a canning opening is formed in the lower side end of the weighing bin, and the packaging bottle conveying belt passes through the position below the canning opening. According to the small-dose weighing and packaging device for the traditional Chinese medicine decoction pieces, the base, the weighing bin, the weighing structure and the material blocking structure are combined to form the small-dose weighing and packaging device for the traditional Chinese medicine decoction pieces, the traditional Chinese medicine decoction pieces are weighed through the weighing structure, the traditional Chinese medicine decoction pieces are separated through the material blocking structure, and therefore weighing of the traditional Chinese medicine decoction pieces can be guaranteed while continuous feeding is conducted; therefore, the overall weighing efficiency of the device is effectively ensured.

Description

Technical Field

[0001] The present invention relates to the technical field related to packaging devices, and in particular to a small-dose weighing and packaging device for Chinese herbal medicine slices. Background Art

[0002] Decoction pieces refer to Chinese medicines that have been processed according to needs and are used for prescriptions, or can be directly used in clinical Chinese medicine. Decoction pieces are the essence of Chinese medicine. The medicinal properties and efficacy of medicinal materials will change after different processing methods. This is the characteristic and advantage of Chinese medicine. After processing, Chinese medicine decoction pieces need to be packaged in a quantitative manner. The existing Chinese patent document with announcement number CN216916378U discloses an automatic weighing and packaging machine for Chinese herbal medicine slices, which includes a base and an electronic scale placed on the base. A support column is fixedly connected to the top of the base near the rear side, a top plate is fixedly connected to the top of the support column, a feeding funnel is fixedly connected to the top of the top plate, two driving devices are symmetrically fixedly connected to the bottom of the top plate, the feeding funnel outlet is located between the two driving devices, and the driving device includes a movable connecting device; two arc-shaped grooves are symmetrically provided on the bottom of the top plate to limit the movement path of the connecting device; However, the weighing structure in the above scheme is set at the bottom, and there is a certain gap between the drop point and the bottom. Therefore, when the bottom weighing reaches the standard, even if the feeding funnel above it stops discharging immediately, there will still be some tablets that continue to drop between the feeding funnel and the bag opening, resulting in a large overall error in the actual operation of the packaging device. For this reason, the present invention proposes a small-dose weighing and packaging device for Chinese herbal medicines to solve the above problem. Summary of the Invention

[0003] The purpose of the present invention is to provide a small-dose weighing and packaging device for Chinese herbal medicine slices to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a small-dose weighing and packaging device for Chinese herbal medicine slices, comprising: A base, on which a primary bracket and a secondary bracket are fixedly mounted, a mounting beam is fixedly mounted on the upper side end of the secondary bracket, and a bottle conveyor belt is mounted on the base; The weighing bin is fixed on the primary bracket, and a hopper is provided at the upper opening of the weighing bin for loading Chinese herbal medicine slices. A canning port is provided at the lower end of the weighing bin, and the packaging bottle conveyor belt passes under the canning port. A weighing structure is provided in the weighing bin and is used to weigh the Chinese herbal medicine pieces; The material blocking structure is arranged in the weighing bin.

[0005] Preferably, a partition plate is fixedly installed on the upper side of the weighing bin, and a plurality of partition plates are arranged at equal intervals, and the partition plates divide the upper bin body of the weighing bin into a plurality of weighing cavities, and a primary rectangular groove and a secondary rectangular groove are provided on the side walls of the weighing cavity. A primary guide rod seat and a secondary guide rod seat are fixedly installed on both side edges of the weighing bin, a primary guide rod is fixedly installed between the primary guide rod seat and the mounting beam, a tertiary guide rod seat is fixedly installed at both ends of the mounting beam, a secondary guide rod is fixedly installed between the tertiary guide rod seat and the secondary guide rod seat, a primary drive structure is fixedly installed on the middle part of the mounting beam, the primary drive structure is used to drive the weighing structure, a secondary drive structure is fixedly installed on the mounting beam through a three-stage bracket, and the secondary drive structure is used to drive the material blocking structure.

[0006] Preferably, the weighing structure includes a first-level movable seat, a mounting plate, a weighing sensor and a material tray. Both ends of the first-level movable seat are provided with a first-level guide rod hole, and the first-level movable seat is movably set on the first-level guide rod. The mounting plate is fixedly mounted on the first-level movable seat. The material tray is connected to the mounting plate through the weighing sensor. The mounting plate and the material tray are movably set in the first-level rectangular groove. When the material tray is extended into the weighing cavity, the material tray completely blocks the cross-section of the weighing cavity, and there is no contact between the material tray and the side wall of the weighing cavity.

[0007] Preferably, the secondary rectangular groove is located above the primary rectangular groove, and the material blocking structure includes a secondary movable seat and a blocking seat. Secondary guide rod holes are opened on both sides of the secondary movable seat, and the secondary movable seat is movably set on the secondary guide rod. The blocking seat is fixed on the secondary movable seat, and the blocking seat is movably set in the secondary rectangular groove, and the secondary driving structure is a telescopic electric cylinder.

[0008] Preferably, the first-level driving structure consists of a cylinder, a piston, a front cover and a telescopic rod, the cylinder is fixed on the mounting beam, the piston is movably arranged in the cylinder, the front cover is fixed at the port of the cylinder, the telescopic rod is fixedly connected to the outer end of the piston, the telescopic rod passes through the center hole of the front cover, and an air inlet and an exhaust port are provided at the bottom of the cylinder, and a one-way valve is provided on the air inlet and the exhaust port, and the air inlet is connected to the air supply port of the air pump through a first-level air pipe.

[0009] Preferably, a spring groove is provided at the outer end of the piston, and a return spring is provided in the spring groove. When the return spring is in a return state, the piston moves to the bottom of the cylinder.

[0010] Preferably, a connecting rod is fixedly connected to the inner wall of the weighing bin, and a guide seat is fixedly installed on the inner end of the connecting rod. There are two guide seats, and a guide rod is fixedly installed between the upper and lower guide seats. A force ring is fixedly installed on the guide rod by a positioning screw, and a support spring is sleeved on the guide rod, and the two ends of the support spring are respectively set to resist the force ring and the guide seat.

[0011] Preferably, force rod grooves are provided on the front and rear side walls of the weighing bin, a force rod is fixedly connected to the side wall near the lower end of the guide rod, a wind receiving plate is fixedly installed on the outer end of the force rod, an air duct seat is fixedly installed on the outer wall of the weighing bin, an air duct is fixedly installed on the air duct seat, the lower end of the air duct is connected to the exhaust port through a secondary air pipe, and the upper port of the air duct is located directly below the wind receiving plate.

[0012] Preferably, a material trough is provided on the upper surface of the material tray, and the material trough is generally shaped with a low center and high edges, and the depth of the central part of the material trough is less than the thickness of the Chinese herbal medicine slices. During the reciprocating drive of the primary drive structure, there is no contact between the material tray and the weighing bin.

[0013] Preferably, a force-bearing protrusion is integrally formed on the side wall of the lower end of the guide rod, and the force-bearing protrusion is a hemispherical protrusion structure, and multiple groups of force-bearing protrusions are evenly arranged on the side wall of the lower end of the guide rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. A small-dose weighing and packaging device for Chinese herbal medicine slices is provided, which is composed of a base, a weighing bin, a weighing structure, and a material blocking structure. The Chinese herbal medicine slices are weighed by the weighing structure, and the material blocking structure forms a barrier for the Chinese herbal medicine slices. Thus, the weighing of the Chinese herbal medicine slices can be ensured while continuously loading the materials, thereby effectively ensuring the overall weighing efficiency of the device. 2. By setting the first-level driving structure to be composed of a cylinder, a piston, a front cover and a telescopic rod, and installing a guide seat on the inner wall of the weighing bin through a connecting rod, and arranging a guide rod on the guide seat, and installing a wind-receiving plate at the lower end of the guide rod through a force-bearing rod, and installing an air duct on the outer wall of the weighing bin through an air duct seat, the gas discharged when the cylinder is depressurized blows the wind-receiving plate, so that the guide rod produces a reciprocating vibration motion up and down, thereby effectively avoiding blockage at the canning port. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure at center A; Figure 3A half-section view of the present invention; Figure 4 for Figure 3 A magnified schematic diagram of the structure at point B in the middle; Figure 5 for Figure 3 A magnified schematic diagram of the structure at point C in the middle; Figure 6 for Figure 5 A magnified schematic diagram of the structure at D in the middle; Figure 7 This is a schematic diagram of the weighing bin structure of the present invention; Figure 8 for Figure 7 A magnified schematic diagram of the structure at E in the middle; Figure 9 A half-section view of a weighing bin of the present invention; Figure 10 This is a schematic diagram of the weighing structure of the present invention; Figure 11 A half-section view of the weighing structure of the present invention; Figure 12 for Figure 11 A magnified schematic diagram of the structure at F in the middle; Figure 13 This is a schematic diagram of the material blocking structure of the present invention; Figure 14 This is a schematic diagram of the guide rod structure of the present invention; Figure 15 for Figure 14 Enlarged schematic diagram of the structure at G in the middle.

[0016] In the figure: base 1, weighing bin 2, weighing structure 3, first-level bracket 4, second-level bracket 5, hopper 6, filling port 7, material blocking structure 8, partition plate 9, first-level rectangular groove 10, second-level rectangular groove 11, first-level guide rod seat 12, second-level guide rod seat 13, mounting beam 14, third-level guide rod seat 15, first-level guide rod 16, second-level guide rod 17, first-level drive structure 18, third-level bracket 19, second-level drive structure 20, first-level movable seat 21, mounting plate 22, weighing sensor 23, object Material tray 24, primary guide rod hole 25, secondary movable seat 26, blocking seat 27, secondary guide rod hole 28, cylinder 29, piston 30, front cover 31, telescopic rod 32, air inlet 33, exhaust port 34, return spring 35, connecting rod 36, guide seat 37, guide rod 38, force ring 39, support spring 40, force rod groove 41, force rod 42, wind plate 43, air duct seat 44, air duct 45, force protrusion 46, material trough 48, and bottle conveyor belt 50. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figures 1-15 , the present invention provides the following three preferred embodiments: Embodiment 1: A device for weighing and packaging small doses of Chinese herbal medicine slices, comprising a base 1, a weighing bin 2, a weighing structure 3 and a material blocking structure 8. A first-level bracket 4 and a second-level bracket 5 are fixedly mounted on the base 1. A mounting beam 14 is fixedly mounted on the upper side of the second-level bracket 5. A packaging bottle conveyor belt 50 is mounted on the base 1. The weighing bin 2 is fixed on the first-level bracket 4, and a hopper 6 is provided at the upper end opening of the weighing bin 2. The hopper 6 is used to load Chinese herbal medicine slices. A canning port 7 is provided at the lower side end of the weighing bin 2. The packaging bottle conveyor belt 50 is connected to the canning port 7. The weighing structure 3 is arranged under the mouth 7, and the weighing structure 3 is arranged in the weighing bin 2. The weighing structure 3 is used to weigh the Chinese herbal medicines. The blocking structure 8 is arranged in the weighing bin 2. By setting a small-dose weighing and packaging device for Chinese herbal medicines composed of a base 1, a weighing bin 2, a weighing structure 3 and a blocking structure 8, the Chinese herbal medicines are weighed by the weighing structure 3, and the blocking structure 8 forms a barrier for the Chinese herbal medicines, so that the weighing of the Chinese herbal medicines can be guaranteed while continuously loading the materials, thereby effectively ensuring the overall weighing efficiency of the device.

[0019] A partition plate 9 is fixedly installed on the upper side of the weighing bin 2. Multiple partition plates 9 are arranged at equal intervals, and the partition plate 9 divides the upper side of the weighing bin 2 into multiple weighing cavities. A first-level rectangular groove 10 and a second-level rectangular groove 11 are opened on the side wall of the weighing cavity. A first-level guide rod seat 12 and a second-level guide rod seat 13 are fixedly installed on both sides of the weighing bin 2. A first-level guide rod 16 is fixedly installed between the first-level guide rod seat 12 and the mounting beam 14. A third-level guide rod seat 15 is fixedly installed at both ends of the mounting beam 14. Between the third-level guide rod seat 15 and the second-level guide rod seat 13 A secondary guide rod 17 is fixedly installed, and a primary drive structure 18 is fixedly installed on the middle part of the mounting beam 14. The primary drive structure 18 is used to drive the weighing structure 3. A secondary drive structure 20 is fixedly installed on the mounting beam 14 through a three-stage bracket 19. The secondary drive structure 20 is used to drive the material blocking structure 8. The partition plate 9 divides the upper side of the weighing bin 2 into multiple weighing cavities. Multiple weighing cavities can prevent the Chinese herbal medicines from being stacked too high and generating force on the side walls of the weighing cavity, thereby ensuring the overall weighing accuracy of the weighing structure 3.

[0020] The weighing structure 3 includes a first-level movable seat 21, a mounting plate 22, a weighing sensor 23 and a material tray 24. Both ends of the first-level movable seat 21 are provided with a first-level guide rod hole 25, and the first-level movable seat 21 is movably set on the first-level guide rod 16. The mounting plate 22 is fixedly installed on the first-level movable seat 21. The material tray 24 is connected to the mounting plate 22 through the weighing sensor 23. The mounting plate 22 and the material tray 24 are movably set in the first-level rectangular groove 10. When the material tray 24 is extended into the weighing cavity, the material tray 24 completely blocks the cross-section of the weighing cavity, and there is no contact between the material tray 24 and the side wall of the weighing cavity.

[0021] The secondary rectangular groove 11 is located above the primary rectangular groove 10. The material blocking structure 8 includes a secondary movable seat 26 and a blocking seat 27. Secondary guide rod holes 28 are opened on both sides of the secondary movable seat 26, and the secondary movable seat 26 is movably set on the secondary guide rod 17. The blocking seat 27 is fixed on the secondary movable seat 26, and the blocking seat 27 is movably set in the secondary rectangular groove 11. The secondary driving structure 20 is a telescopic electric cylinder.

[0022] Example 2: On the basis of Example 1, the first-level driving structure 18 consists of a cylinder 29, a piston 30, a front cover plate 31 and a telescopic rod 32. The cylinder 29 is fixed on the mounting beam 14, and the piston 30 is movably arranged in the cylinder 29. The front cover plate 31 is fixed at the port of the cylinder 29. The telescopic rod 32 is fixedly connected to the outer end of the piston 30. The telescopic rod 32 passes through the center hole of the front cover plate 31. The bottom of the cylinder 29 is provided with an air inlet 33 and an exhaust port 34. Both the air inlet 33 and the exhaust port 34 are provided with a one-way valve. The air inlet 33 is connected to the air supply port of the air pump through the first-level air pipe. The piston A spring groove is provided at the outer end of 30, and a return spring 35 is provided in the spring groove. When the return spring 35 is in the reset state, the piston 30 moves to the bottom of the cylinder 29, and a connecting rod 36 is fixedly connected to the inner wall of the weighing bin 2. A guide seat 37 is fixedly installed on the inner end of the connecting rod 36. There are two guide seats 37, and a guide rod 38 is fixedly installed between the upper and lower guide seats 37. A force ring 39 is fixedly installed on the guide rod 38 by a positioning screw. A support spring 40 is sleeved on the guide rod 38, and the two ends of the support spring 40 are respectively set to resist the force ring 39 and the guide seat 37.

[0023] The front and rear side walls of the weighing bin 2 are provided with a force rod groove 41, the side wall of the guide rod 38 near the lower end is fixedly connected with a force rod 42, the outer end of the force rod 42 is fixedly installed with a wind plate 43, the outer wall of the weighing bin 2 is fixedly installed with an air duct seat 44, and the air duct seat 44 is fixedly installed with an air duct 45. The lower end of the air duct 45 is connected to the exhaust port 34 through a secondary air pipe, and the upper side port of the air duct 45 is located just below the wind plate 43. By setting the first-level driving structure 18 to be composed of the cylinder 29, the piston 30, and the front The cover plate 31 and the telescopic rod 32 are composed of a combination, and a guide seat 37 is installed on the inner wall of the weighing bin 2 through a connecting rod 36, and a guide rod 38 is set on the guide seat 37, and a wind-receiving plate 43 is installed at the lower end of the guide rod 38 through a force-bearing rod 42, and an air duct 45 is installed on the outer wall of the weighing bin 2 through an air duct seat 44, so that the gas discharged when the cylinder 29 is depressurized blows the wind-receiving plate 43, so that the guide rod 38 produces reciprocating vibration motion up and down, thereby effectively avoiding blockage at the position of the canning port 7.

[0024] Example 3: Based on Example 2, a material trough 48 is provided on the upper surface of the material tray 24. The material trough 48 is generally shaped with a low center and high edges, and the depth of the central part of the material trough 48 is less than the thickness of the Chinese herbal medicine slices. During the reciprocating drive of the primary drive structure 18, there is no contact between the material tray 24 and the weighing bin 2, which makes it easier for the Chinese herbal medicine slices to approach the center position of the material tray 24.

[0025] A force-bearing protrusion 46 is integrally formed on the side wall of the lower end of the guide rod 38. The force-bearing protrusion 46 is a hemispherical protrusion structure, and multiple groups of force-bearing protrusions 46 are evenly arranged on the side wall of the lower end of the guide rod 38. The force-bearing protrusions 46 are used to move the Chinese herbal medicine slices, thereby better avoiding blockage at the position of the canning port 7.

[0026] Although the above describes the illustrative specific embodiments of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.

Claims

1. A small-dose weighing and packaging device for Chinese herbal medicine slices, characterized by: include: A base (1), a primary bracket (4) and a secondary bracket (5) are fixedly mounted on the base (1), a mounting beam (14) is fixedly mounted on the upper side end of the secondary bracket (5), and a bottle conveyor belt (50) is mounted on the base (1); A weighing bin (2), the weighing bin (2) being fixed on a primary bracket (4), and a hopper (6) being provided at an upper opening of the weighing bin (2), the hopper (6) being used for loading Chinese herbal medicine slices, a canning port (7) being provided at a lower side end of the weighing bin (2), and the packaging bottle conveyor belt (50) passing below the canning port (7); A weighing structure (3), the weighing structure (3) is arranged in the weighing bin (2), and the weighing structure (3) is used to weigh the Chinese herbal medicine slices; A material blocking structure (8), wherein the material blocking structure (8) is arranged in the weighing bin (2).

2. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 1, characterized in that: A partition plate (9) is fixedly installed on the upper side of the weighing bin (2), and a plurality of partition plates (9) are arranged at equal intervals. The partition plates (9) divide the upper side of the weighing bin (2) into a plurality of weighing cavities. A first-level rectangular groove (10) and a second-level rectangular groove (11) are opened on the side wall of the weighing cavity. A first-level guide rod seat (12) and a second-level guide rod seat (13) are fixedly installed on both sides of the weighing bin (2). A first-level guide rod (16) is fixedly installed between the first-level guide rod seat (12) and the mounting beam (14). The mounting beam A three-stage guide rod seat (15) is fixedly installed at both ends of (14), a secondary guide rod (17) is fixedly installed between the three-stage guide rod seat (15) and the secondary guide rod seat (13), a primary drive structure (18) is fixedly installed in the middle part of the mounting beam (14), and the primary drive structure (18) is used to drive the weighing structure (3), and a secondary drive structure (20) is fixedly installed on the mounting beam (14) through a three-stage bracket (19), and the secondary drive structure (20) is used to drive the material blocking structure (8).

3. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 2, characterized in that: The weighing structure (3) includes a first-level movable seat (21), a mounting plate (22), a weighing sensor (23) and a material tray (24). Both ends of the first-level movable seat (21) are provided with a first-level guide rod hole (25), and the first-level movable seat (21) is movably arranged on the first-level guide rod (16). The mounting plate (22) is fixedly mounted on the first-level movable seat (21). The material tray (24) is connected to the mounting plate (22) through the weighing sensor (23). The mounting plate (22) and the material tray (24) are movably arranged in the first-level rectangular groove (10). When the material tray (24) is extended into the weighing cavity, the material tray (24) completely blocks the cross section of the weighing cavity, and there is no contact between the material tray (24) and the side wall of the weighing cavity.

4. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 3, characterized in that: The secondary rectangular groove (11) is located above the primary rectangular groove (10); the material blocking structure (8) includes a secondary movable seat (26) and a blocking seat (27); secondary guide rod holes (28) are provided on both sides of the secondary movable seat (26); the secondary movable seat (26) is movably arranged on the secondary guide rod (17); the blocking seat (27) is fixed on the secondary movable seat (26); and the blocking seat (27) is movably arranged in the secondary rectangular groove (11); and the secondary driving structure (20) is a telescopic electric cylinder.

5. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 4, characterized in that: The first-stage driving structure (18) consists of a cylinder (29), a piston (30), a front cover (31) and a telescopic rod (32), wherein the cylinder (29) is fixed on the mounting beam (14), the piston (30) is movably arranged in the cylinder (29), the front cover (31) is fixed at the port of the cylinder (29), the telescopic rod (32) is fixedly connected to the outer end of the piston (30), and the telescopic rod (32) passes through the central hole of the front cover (31), and an air inlet (33) and an air outlet (34) are provided at the bottom of the cylinder (29), and both the air inlet (33) and the air outlet (34) are provided with a one-way valve, and the air inlet (33) is connected to the air supply port of the air pump through a first-stage air pipe.

6. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 5, characterized in that: A spring groove is provided at the outer end of the piston (30), and a return spring (35) is provided in the spring groove. When the return spring (35) is in a return state, the piston (30) moves to the bottom of the cylinder (29).

7. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 6, characterized in that: A connecting rod (36) is fixedly connected to the inner wall of the weighing bin (2), and a guide seat (37) is fixedly installed on the inner end of the connecting rod (36). Two guide seats (37) are provided, and a guide rod (38) is fixedly installed between the upper and lower guide seats (37). A force ring (39) is fixedly installed on the guide rod (38) by a positioning screw. A support spring (40) is sleeved on the guide rod (38), and the two ends of the support spring (40) are respectively set to resist the force ring (39) and the guide seat (37).

8. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 7, characterized in that: The front and rear side walls of the weighing bin (2) are both provided with force rod grooves (41), the side wall near the lower end of the guide rod (38) is fixedly connected to a force rod (42), the outer end of the force rod (42) is fixedly mounted with a wind plate (43), the outer side wall of the weighing bin (2) is fixedly mounted with an air duct seat (44), the air duct seat (44) is fixedly mounted with an air duct (45), the lower side end of the air duct (45) is connected to the exhaust port (34) through a secondary air pipe, and the upper side port of the air duct (45) is located directly below the wind plate (43).

9. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 8, characterized in that: A material trough (48) is provided on the upper surface of the material tray (24). The material trough (48) is generally shaped with a lower center and higher edges, and the depth of the central portion of the material trough (48) is less than the thickness of the Chinese herbal medicine slices. During the reciprocating drive of the primary drive structure (18), the material tray (24) and the weighing bin (2) do not contact each other.

10. A small-dose weighing and packaging device for Chinese herbal medicine slices according to claim 9, characterized in that: A force-bearing protrusion (46) is integrally formed on the side wall of the lower end of the guide rod (38). The force-bearing protrusion (46) is a hemispherical protrusion structure, and multiple groups of force-bearing protrusions (46) are evenly arranged on the side wall of the lower end of the guide rod (38).

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