A medicine material grinder

Abstract

A medicinal material grinder, comprising a box body, a crushing assembly for crushing medicinal materials is arranged on the top of the box body, a rotating shaft is arranged in the box body, a plurality of crushing knives are uniformly arranged on the outer periphery of the rotating shaft, a first motor is fixedly arranged on the box body and fixedly connected with the rotating shaft, a filter screen is arranged in the box body, a turnover device for intermittently overturning the filter screen is arranged on the box body and connected with the rotating shaft, and an elastic assembly for resetting the filter screen after overturning is arranged in the box body; the first motor drives the crushing knives to rotate and crush the medicinal materials through the rotating shaft, the filter screen is intermittently overturned by the turnover device while the rotating shaft rotates, the medicinal materials with a particle size not meeting the crushing standard on the surface of the filter screen are projected towards the direction of the crushing knives in cooperation with the elastic assembly, so that the medicinal materials with a particle size not meeting the crushing standard are cyclically crushed by the crushing knives. The medicinal material particles with a particle size not meeting the standard are prevented from continuously accumulating on the surface of the filter screen and causing the filter screen to be blocked.

Description

Technical Field

[0001] This invention relates to the field of medicinal material processing technology, specifically to a medicinal material pulverizer. Background Technology

[0002] Medicinal materials are the raw materials used in pharmaceutical manufacturing, especially in China, referring to unprocessed or unprepared Chinese medicinal herbs. To increase the surface area of ​​the herbs, promote dissolution, and facilitate formulation, it is necessary to pulverize them. Pulverizing Chinese medicinal herbs is a process that uses mechanical force to break large pieces of solid Chinese medicinal materials into appropriately fine particles. The pulverization effect is affected by the structure of the medicinal materials and the type of external force used; commonly used external forces include cutting, extrusion, and grinding.

[0003] For example, patent document CN114289126B, entitled "A Chinese Herbal Medicine Pulverizer with Filter," includes a pulverizing chamber, a door, a feeding hopper, a pulverizing motor, and pulverizing paddles. The pulverizing chamber has a door on its front side, a feeding hopper embedded and fixed to the upper left side, and a pulverizing motor fixed to the upper side of the pulverizing chamber. The pulverizing motor is connected to an external power source, and its output shaft passes through the top plate of the pulverizing chamber and is fixed to a pulverizing shaft with several pulverizing paddles fixed on it. A guide frame is fixedly installed inside the pulverizing chamber and positioned below the pulverizing paddles. A filter screen is positioned above the guide frame. The raw medicinal materials are placed from the feeding hopper into the pulverizing chamber and pulverized by the pulverizing paddles. The pulverized medicinal materials flow downwards through the filter screen and then downwards from the guide frame.

[0004] However, the aforementioned literature presents two main problems during the pulverization process of medicinal materials. First, large pieces of medicinal material are often not pulverized thoroughly, leading to particles that do not meet the pulverization standard clogging the filter screen and affecting filtration efficiency. Second, the filter screen itself is relatively slow in filtering pulverized medicinal materials. These two problems combine to negatively impact overall production efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a medicinal herb pulverizer to solve the technical problems mentioned in the background art, such as the incomplete pulverization of large pieces of medicinal materials and the slow filtration efficiency of the filter screen for pulverized medicinal materials.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A medicinal herb pulverizer includes a housing. A pulverizing component for pulverizing medicinal herbs is mounted on the top of the housing. A rotating shaft located below the pulverizing component is rotatably mounted inside the housing. Pulverizing blades are uniformly fixed around the outer circumference of the rotating shaft. A first motor is fixedly mounted in the housing and connected to the rotating shaft. A filter screen is rotatably mounted inside the housing below the pulverizing blades. The housing is equipped with a flipping device for intermittently flipping the filter screen. The flipping device is connected to the rotating shaft. An elastic component is installed inside the housing for resetting the filter screen after flipping. The first motor drives the pulverizing blades to rotate via the rotating shaft to pulverize the medicinal herbs. Simultaneously, the rotating shaft drives the filter screen to intermittently flip via the flipping device. The filter screen, in conjunction with the elastic component, propels medicinal herbs whose surface particle size does not meet the pulverizing standard towards the pulverizing blades, thereby allowing the pulverizing blades to circulate and pulverize the medicinal herbs whose particle size does not meet the pulverizing standard.

[0008] Working Principle: During operation, the pulverizing component is activated to pulverize the medicinal materials. After initial pulverization, the materials fall into the working area of ​​the pulverizing blades below. Simultaneously, the first motor is activated, driving the rotating shaft to rotate at high speed. This rotation, in turn, drives the pulverizing blades to further refine the initially pulverized materials. The pulverized materials then fall onto the surface of the filter screen and are filtered. Powder meeting the pulverization standard passes through the mesh and falls into the collection area below. Coarse particles that do not meet the standard are retained on the filter screen surface. Simultaneously, the rotating shaft's rotation also causes the filter screen to intermittently rotate via a flipping device. The filter screen, in conjunction with an elastic component, propels any particles that do not meet the pulverization standard towards the pulverizing blades, thus allowing the pulverizing blades to continuously pulverize these smaller particles.

[0009] Furthermore, connecting shafts are fixedly provided on both sides of the filter screen, and the connecting shafts are rotatably connected to the housing. A gear set is provided on the housing, and one of the connecting shafts is connected to the gear set. The flipping device includes a transmission component and a reciprocating component. The transmission component is connected to the reciprocating component and the rotating shaft respectively. A rack is provided on the reciprocating component, and the rack meshes with the gear set when it contacts.

[0010] Furthermore, the transmission assembly includes a fixed plate fixedly mounted on the housing and a transmission shaft rotatably mounted on the fixed plate. A first bevel gear is fixedly mounted on the transmission shaft, and one end of the shaft extends to the outside of the housing and is fixedly mounted with a second bevel gear. The second bevel gear meshes with the first bevel gear, and the transmission shaft is connected to the reciprocating assembly.

[0011] Furthermore, the reciprocating assembly includes two connecting plates fixedly mounted on the housing and spaced apart. A reciprocating screw is rotatably mounted between the two connecting plates. A slider is threadedly connected to the outer circumference of the reciprocating screw. A guide rod is fixedly mounted between the two connecting plates and slidably connected to the slider. The bottom of the slider is fixedly connected to a rack. A second pulley is fixedly mounted on the reciprocating screw. A first pulley is fixedly mounted on the drive shaft. A drive belt is sleeved on the outer circumference of the first pulley and the second pulley.

[0012] Furthermore, a mounting shaft is rotatably mounted inside the housing, a telescopic rod is fixedly mounted on the mounting shaft, a scraper is slidably mounted on the telescopic rod, a spring is fixedly mounted between the scraper and the telescopic rod, the bottom end of the scraper abuts against the filter screen, and the mounting shaft is connected to a gear set.

[0013] Furthermore, the gear set includes a first gear, a second gear, a third gear, and a fourth gear that are rotatably disposed on one side of the housing and mesh in sequence. The first gear is fixedly connected to the mounting shaft and meshes with the rack when in contact. The fourth gear is fixedly connected to one of the connecting shafts.

[0014] Furthermore, the elastic component includes four springs fixedly disposed at the bottom of the filter screen, each spring corresponding to one of the four corners of the filter screen. A support plate is fixedly disposed at the bottom of each spring, and the support plate is fixedly connected to the housing.

[0015] Furthermore, the pulverizing assembly includes a second motor fixedly mounted on the housing and two drive shafts rotatably mounted on the top of the housing and symmetrically arranged. The two drive shafts are fixedly equipped with pulverizing rollers that cooperate with each other to pulverize the medicinal materials. One end of each drive shaft extends to the outside of the housing and is fixedly equipped with a drive gear, and the drive gears on the two drive shafts mesh with each other. The output end of the second motor is fixedly connected to one of the drive shafts.

[0016] Furthermore, guide blocks for guiding the upwardly projected medicinal materials are symmetrically fixed inside the box.

[0017] Furthermore, a collection frame is slidably provided at the bottom of the box, and a handle is fixedly provided on one side of the collection frame.

[0018] The beneficial effects of this invention are as follows:

[0019] By incorporating a pulverizing assembly, a rotating shaft, pulverizing blades, a filter screen, a tilting device, and an elastic component, the pulverizing assembly is activated during operation to pulverize the medicinal materials. After initial pulverization, the materials fall into the working area of ​​the pulverizing blades below. Simultaneously, the first motor is activated, driving the rotating shaft to rotate at high speed. This, in turn, drives the pulverizing blades to further refine the initially pulverized materials. The pulverized materials then fall onto the surface of the filter screen and are filtered. Powder particles meeting the pulverization standard pass through the mesh of the filter screen and fall into the collection area below; coarse particles that do not meet the standard are retained on the surface of the filter screen. Simultaneously, as the shaft rotates, the filter screen is intermittently flipped by the flipping device. The filter screen, in conjunction with the elastic component, throws medicinal materials whose surface particle size does not meet the pulverization standard towards the pulverizing blade, thereby enabling the pulverizing blade to circulate and pulverize the medicinal materials whose particle size does not meet the pulverization standard. This prevents the medicinal material particles that do not meet the pulverization standard from continuously accumulating on the surface of the filter screen and causing blockage, which would affect the filtration efficiency of the filter screen. Furthermore, during the process of the elastic component driving the filter screen to reset, the filter screen can also vibrate, further accelerating the filtration efficiency of the filter screen for the pulverized medicinal material powder that meets the pulverization standard, thereby improving the overall production efficiency. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a perspective view of the invention from another angle;

[0022] Figure 3 This is a three-dimensional sectional view of the present invention;

[0023] Figure 4 For the present invention Figure 2 Enlarged view of point A;

[0024] Figure 5 This is a front sectional view of the present invention;

[0025] Figure 6 A perspective cross-sectional view of the present invention from another angle;

[0026] Figure 7 For the present invention Figure 6 Enlarged view of point B.

[0027] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Feed hopper; 12. Arc-shaped groove; 13. Guide block; 2. First motor; 21. Rotating shaft; 22. Crushing blade; 3. Second motor; 31. Drive shaft; 32. Drive gear; 33. Crushing roller; 4. Collection frame; 41. Handle; 5. Filter screen; 51. Connecting shaft; 6. Spring one; 61. Support plate; 7. Fixing plate; 71. Transmission shaft; 72. First bevel gear; 73. Second bevel gear; 8. Connecting plate; 81. Reciprocating screw; 82. Slider; 83. Guide rod; 84. Rack; 85. Second pulley; 86. First pulley; 87. Transmission belt; 9. First gear; 91. Second gear; 92. Third gear; 93. Fourth gear; 10. Mounting shaft; 101. Telescopic rod; 102. Scraper; 103. Receiving groove; 104. Spring two. Detailed Implementation

[0028] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1-3 As shown, a medicinal herb pulverizer includes a housing 1, with a feed hopper 11 fixedly installed at the top center of the housing 1, communicating with its interior. A pulverizing assembly for pulverizing medicinal herbs is installed on the top of the housing 1. The pulverizing assembly includes a second motor 3 fixedly installed on one side of the housing 1 and two drive shafts 31 rotatably installed on the top of the housing 1 and symmetrically arranged. Pulverizing rollers 33 that cooperate to pulverize the medicinal herbs are fixedly sleeved on the outer periphery of the two drive shafts 31. The output end of the second motor 3 is coaxially and fixedly connected to one of the drive shafts 31. The ends of both drive shafts 31 away from the second motor 3 extend to the outside of the housing 1 and are fixedly mounted with drive gears 32, and the drive gears 32 fixedly sleeved on the outer periphery of the two drive shafts 31 mesh with each other.

[0030] In use, the second motor 3 is started, which drives the connected drive shaft 31 to rotate. Since the drive gears 32 mesh with each other at the ends of the two drive shafts 31, the other drive shaft 31 can be driven to rotate in the opposite direction synchronously, thereby realizing that the two crushing rollers 33 rotate in opposite directions. Then, the medicinal materials to be crushed are put into the box 1 through the feed hopper 11, so that the medicinal materials fall between the two crushing rollers 33. The medicinal materials are crushed by the squeezing and shearing action between the two crushing rollers 33.

[0031] like Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, a rotating shaft 21 located below the pulverizing assembly is rotatably installed inside the housing 1. Multiple pulverizing blades 22 are evenly fixedly installed on the outer circumference of the rotating shaft 21. A first motor 2 is fixedly installed on one side of the housing 1, with its output end passing through the housing 1 and coaxially connected to the rotating shaft 21. After the medicinal materials are initially pulverized by the two pulverizing rollers 33, they fall to the area of ​​the pulverizing blades 22 below. The first motor 2 is then activated, driving the rotating shaft 21 to rotate at high speed. The rotating shaft 21, in turn, drives the pulverizing blades 22 to rotate at high speed, thereby further refining the initially pulverized medicinal materials with the pulverizing blades 22. This improves the fineness and uniformity of the pulverized materials, ensuring the pulverizing effect.

[0032] like Figure 3 , Figure 5 and Figure 6 As shown, a filter screen 5 is rotatably installed inside the housing 1, located below the pulverizing blade 22. Connecting shafts 51 are fixedly installed on the middle of both sides of the filter screen 5, and the connecting shafts 51 are rotatably connected to the housing 1. After being pulverized by the pulverizing blade 22, the medicinal materials fall onto the surface of the filter screen 5 and are filtered. Powdered medicinal materials with particle sizes meeting the pulverization standards fall through the mesh of the filter screen 5 into the collection area below; while coarse particles that do not meet the particle size standards are retained on the surface of the filter screen 5 for subsequent recycling and pulverization.

[0033] like Figures 2-6 As shown, the housing 1 is equipped with a flipping device for intermittently flipping the filter screen 5, which is connected to the rotating shaft 21. Inside the housing 1 is an elastic component for resetting the filter screen 5 after flipping. When the rotating shaft 21 drives the pulverizing blade 22 to pulverize the medicinal materials at high speed, the rotating shaft 21 simultaneously drives the filter screen 5 to intermittently flip via the flipping device. During this process, the filter screen 5, in conjunction with the elastic component, throws medicinal material particles that do not meet the particle size standard towards the pulverizing blade 22, allowing the pulverizing blade 22 to circulate and pulverize these particles. This prevents the particles from continuously accumulating on the surface of the filter screen 5 and clogging it, thus affecting its filtration efficiency. Simultaneously, during the resetting process of the filter screen 5 by the elastic component, the filter screen 5 vibrates, accelerating the filtration efficiency of the pulverized medicinal material powder, thereby improving overall production efficiency.

[0034] like Figure 4 and Figure 6 As shown, a gear set is installed on one side of the housing 1. The gear set includes a first gear 9, a second gear 91, a third gear 92, and a fourth gear 93, which are rotatably mounted on one side of the housing 1 and mesh in sequence. The connecting shaft 51 on one side of the filter screen 5 passes through the housing 1 and is coaxially and fixedly connected to the fourth gear 93.

[0035] like Figure 4As shown, the tilting device includes a transmission assembly and a reciprocating assembly. The transmission assembly is connected to both the reciprocating assembly and the rotating shaft 21. The transmission assembly includes a fixed plate 7 fixedly mounted on one side of the housing 1 and a transmission shaft 71 rotatably passing through the fixed plate 7. The transmission shaft 71 is horizontally arranged. A first bevel gear 72 is fixedly sleeved on one end of the transmission shaft 71, and a second bevel gear 73 is fixedly sleeved on one end of the rotating shaft 21 outside the housing 1. The second bevel gear 73 meshes with the first bevel gear 72.

[0036] like Figure 4 As shown, the reciprocating assembly includes two connecting plates 8 fixedly installed on one side of the housing 1 and spaced apart. A reciprocating screw 81 is rotatably installed between the two connecting plates 8. Both ends of the reciprocating screw 81 are smooth sections, and both ends of the reciprocating screw 81 are rotatably connected to the corresponding connecting plates 8. A slider 82 is threadedly connected to the outer circumference of the reciprocating screw 81. Guide rods 83 are symmetrically fixedly installed between the two connecting plates 8. The guide rods 83 are parallel to the reciprocating screw 81, pass through the slider 82, and are slidably connected to the slider 82 to prevent the slider 82 from rotating with the reciprocating screw 81. A rack 84 is fixedly installed at the bottom of the slider 82, and the rack 84 meshes with the first gear 9 when in contact. One end of the reciprocating screw 81 passes through the corresponding connecting plate 8 and is fixedly fitted with a second pulley 85. The end of the drive shaft 71 away from the first bevel gear 72 is fixedly fitted with a first pulley 86. A drive belt 87 is fitted around the outer circumference of the first pulley 86 and the second pulley 85.

[0037] like Figure 3 , Figure 5 and Figure 6 As shown, the elastic component includes four springs 6 fixedly installed at the bottom of the filter screen 5, with each spring 6 corresponding to one of the four corners of the filter screen 5. A support plate 61 is fixedly installed at the bottom of each spring 6, and the support plate 61 is fixedly connected to the inner wall of the housing 1. The inner wall of the housing 1 has symmetrically formed arc-shaped grooves 12, which slide in conjunction with the filter screen 5. The arc-shaped grooves 12 can both avoid the flipping motion of the filter screen 5, preventing it from colliding with or getting stuck against the inner wall of the housing 1 during flipping, and also block medicinal particles that have not reached the pulverization standard, preventing them from sliding directly from the gap between the filter screen 5 and the housing wall to the bottom of the filter screen.

[0038] To achieve the intermittent flipping of the filter screen 5, when the rotating shaft 21 rotates, it synchronously drives the second bevel gear 73 to rotate. The second bevel gear 73 drives the first bevel gear 72 to rotate. The first bevel gear 72 drives the first pulley 86 to rotate via the transmission shaft 71, which in turn drives the second pulley 85 to rotate via the transmission belt 87, thereby driving the reciprocating screw 81 to rotate. The rotation of the reciprocating screw 81 drives the slider 82 to reciprocate linearly along its axis. The slider 82 drives the rack 84 to move back and forth synchronously. When the rack 84 moves to contact the first gear 9, they mesh with each other, driving the first gear 9 to rotate back and forth. The first gear 9, after being transmitted through the second gear 91 and the third gear 92, drives the fourth gear 93 to rotate back and forth. The fourth gear 93 drives the filter screen 5 to rotate back and forth via the corresponding connecting shaft 51, thereby achieving the intermittent reciprocating flipping of the filter screen 5. At the same time, the filter screen 5 will correspondingly compress or stretch the spring 6 at its bottom.

[0039] The filter screen 5 is divided into two planar areas along the axis of the connecting shaft 51. When the rack 84 moves to the state of disengagement from the first gear 9, the filter screen 5 instantly flips back to its original position under the restoring force of the spring 6. This rapid flipping action causes the two planar areas of the filter screen 5 to flip upwards and downwards respectively. The upward-flipping planar area of ​​the filter screen 5 can throw the un-crushed medicinal material particles remaining on its surface toward the pulverizing blade 22, allowing them to re-enter the pulverizing range of the pulverizing blade 22. Thus, through the intermittent reciprocating flipping of the filter screen 5, the un-crushed medicinal material particles are repeatedly thrown into the working range of the pulverizing blade 22, while the pulverized medicinal material falls into the bottom of the filter screen 5 through the filter holes, ensuring that the collected medicinal material powder meets the fineness requirements. The downward instantaneous flipping of the other planar area of ​​the filter screen 5 can throw the medicinal material powder that meets the pulverization standard downwards, increasing the filtration efficiency of the filter screen 5. Furthermore, during the reset process of the filter screen 5 driven by the spring 6, the two planar areas of the filter screen 5 will move up and down alternately, thereby causing the filter screen 5 to vibrate and further enhancing the filtration efficiency of the filter screen 5 for medicinal powder.

[0040] like Figure 3 and Figure 5 As shown, two symmetrically arranged guide blocks 13 are fixedly installed inside the housing 1. The two guide blocks 13 are used to guide the upward-thrown medicinal materials. The pulverizing blade 22 is located between the two guide blocks 13, and the side of the guide block 13 near the pulverizing blade 22 is provided with an arc-shaped transition to ensure that the upward-thrown medicinal materials can be guided into the working range of the pulverizing blade 22 along the arc-shaped transition of the guide block 13.

[0041] like Figure 2 and Figure 3As shown, a collection frame 4 is slidably installed on the bottom of the box 1. A through groove is provided on the bottom of the box 1, allowing the collection frame 4 to pass through and enter the box 1. Sliding grooves are provided on both sides of the bottom of the box 1, and the two sides of the collection frame 4 slide into the corresponding sliding grooves. The top opening of the collection frame 4 is adapted to the filter screen 5, ensuring that the pulverized medicinal materials fall into the collection frame 4. A handle 41 is fixedly installed on one side of the collection frame 4. The pulverized medicinal powder, after being filtered by the filter screen 5, will fall into the collection frame 4 for collection. When it is necessary to transfer the pulverized medicinal materials to the next process, the collection frame 4 can be pulled out from the bottom of the box 1 through the handle 41.

[0042] like Figures 2-7 As shown, the linear velocity of the medicinal material when it is projected is related to the linear velocity at various points on the surface of the filter screen 5, v (linear velocity) = ω (angular velocity) × r (distance from the medicinal material to the connecting shaft 51). That is, when the medicinal material particles are placed at the edge of the filter screen 5 (where r is the largest), they are more likely to obtain a large initial projectile velocity. However, the medicinal material particles that do not meet the standards are mostly irregular in shape. During the downward flipping of the planar area of ​​the filter screen 5, they are difficult to roll and slide to the edge of the filter screen 5 on their own, resulting in insufficient initial projectile velocity and possibly preventing them from being projected onto the pulverizing blade 22. Therefore, in order to obtain a larger initial projectile velocity for the pulverized medicinal material particles that do not meet the standards, it is necessary to ensure that the medicinal material particles are projected into the working area of ​​the pulverizing blade 22. A mounting shaft 10 is also rotatably installed inside the housing 1. One end of the mounting shaft 10 extends outside the housing 1 and is coaxially fixedly connected to the first gear 9. The mounting shaft 10 is located between the rotating shaft 21 and the connecting shaft 51, and the rotating shaft 21, the mounting shaft 10, and the connecting shaft 51 are arranged vertically in sequence. Multiple telescopic rods 101 are fixedly installed on the outer periphery of the mounting shaft 10 along its axial direction. The telescopic rods 101 are arranged at equal intervals, and scrapers 102 are slidably fitted onto the outer periphery of each telescopic rod 101. Multiple receiving grooves 103 are sequentially formed on the top of each scraper 102 along its length, each groove corresponding to one of the telescopic rods 101. The receiving grooves 103 are adapted to the telescopic rods 101, with the telescopic rods 101 inserted into and slidably connected to the receiving grooves 103. A spring 104 is fixedly installed between the bottom end of the telescopic rod 101 and the bottom end of the receiving groove 103. The bottom end of the scraper 102 abuts against the surface of the filter screen 5.

[0043] Initially, spring 104 is compressed, and the bottom of scraper 102 is located at the center of scraper 102. During the reciprocating rotation of first gear 9, the mounting shaft 10 is driven to reciprocate. The mounting shaft 10 drives scraper 102 to reciprocate via telescopic rod 101. Since first gear 9, through the transmission of second gear 91 and third gear 92, drives fourth gear 93 to rotate in the opposite direction to first gear 9, when a part of the plane area of ​​filter screen 5 flips downward, scraper 102 moves toward the plane area of ​​filter screen 5 that is flipped downward. At the same time, under the restoring force of spring 104, scraper 102 is always kept in contact with the surface of filter screen 5, thereby pushing the uncrushed medicinal particles on the surface of filter screen 5 to the edge of the plane area of ​​filter screen 5 that is flipped downward. This allows the uncrushed medicinal particles to obtain a greater initial velocity when they are thrown, ensuring that the medicinal particles are thrown into the crushing range of pulverizer 22.

[0044] Considering that medicinal materials usually contain a certain amount of moisture, the powdered medicinal materials easily adhere to the surface of the filter screen 5. During the reciprocating movement of the scraper 102, the medicinal powder adhering to the surface of the filter screen 5 can be scraped off, preventing the powder adhering to the surface of the filter screen 5 from accumulating and clogging the filter pores, thereby preventing a decrease in the filtration efficiency of the filter screen 5.

[0045] Furthermore, the reciprocating movement of the scraper 102 can also agitate medicinal particles that are partially stuck in the filter holes; simultaneously, the vibration generated during the reset process of the filter screen 5 can help dislodge the medicinal particles stuck in the filter holes. This further prevents the filter screen 5 from becoming clogged and ensures that the filter screen 5 remains unobstructed.

[0046] Working principle:

[0047] In use, the second motor 3 is started, which drives the connected drive shaft 31 to rotate. Since the drive gears 32 mesh with each other at the ends of the two drive shafts 31, the other drive shaft 31 can be driven to rotate in the opposite direction synchronously, thereby realizing that the two crushing rollers 33 rotate in opposite directions. Then, the medicinal materials to be crushed are put into the box 1 through the feed hopper 11, so that the medicinal materials fall between the two crushing rollers 33. The medicinal materials are crushed by the squeezing and shearing action between the two crushing rollers 33.

[0048] After the medicinal materials are initially pulverized by the two pulverizing rollers 33, they fall into the working area of ​​the pulverizing blade 22 below. At the same time, the first motor 2 is started, which drives the rotating shaft 21 to rotate at high speed. The rotating shaft 21 drives the pulverizing blade 22 to rotate at high speed, so that the pulverizing blade 22 further refines the pulverized medicinal materials to improve the fineness and uniformity of the pulverization.

[0049] After being pulverized by the pulverizer 22, the medicinal materials fall onto the surface of the filter screen 5 and are filtered by the filter screen 5. The medicinal material powder with a particle size that meets the pulverization standard falls into the collection frame 4 below it through the mesh of the filter screen 5; while the coarse particles of the medicinal materials that do not meet the particle size standard will be trapped on the surface of the filter screen 5 for subsequent recycling and pulverization.

[0050] When the rotating shaft 21 rotates, it also synchronously drives the second bevel gear 73 to rotate. The second bevel gear 73 drives the first bevel gear 72 to rotate. The first bevel gear 72 drives the first pulley 86 to rotate via the transmission shaft 71, which in turn drives the second pulley 85 to rotate via the transmission belt 87. The second pulley 85 drives the reciprocating screw 81 to rotate. The rotation of the reciprocating screw 81 drives the slider 82 to reciprocate linearly along its axis. The slider 82 drives the rack 84 to move back and forth synchronously. When the rack 84 moves to contact the first gear 9, they mesh with each other, thereby driving the first gear 9 to rotate back and forth. The first gear 9, after being transmitted through the second gear 91 and the third gear 92 in sequence, drives the fourth gear 93 to rotate back and forth. The fourth gear 93 drives the filter screen 5 to rotate back and forth through the corresponding connecting shaft 51, thereby enabling the filter screen 5 to intermittently rotate back and forth. At the same time, the filter screen 5 will correspondingly compress or stretch the spring 6 at its bottom.

[0051] The filter screen 5 is divided into two planar areas along the axis of the connecting shaft 51. When the rack 84 moves to the state of disengagement from the first gear 9, the filter screen 5 instantly flips back to its original position under the restoring force of the spring 6. This rapid flipping action causes the two planar areas of the filter screen 5 to flip upwards and downwards respectively. The upward-flipping planar area of ​​the filter screen 5 can throw the un-crushed medicinal material particles remaining on its surface toward the pulverizing blade 22, allowing them to be guided into the working range of the pulverizing blade 22 along the arc transition of the guide block 13. Thus, through the intermittent reciprocating flipping of the filter screen 5, the un-crushed medicinal material particles are cyclically thrown into the working range of the pulverizing blade 22, while the pulverized medicinal material falls into the bottom of the filter screen 5 through the filter holes, ensuring that the collected medicinal material powder meets the fineness requirements. The downward instantaneous flipping of the other planar area of ​​the filter screen 5 can throw the medicinal material powder that meets the pulverization standard downwards, increasing the filtration efficiency of the filter screen 5. Furthermore, during the reset process of the filter screen 5 driven by the spring 6, the two planar areas of the filter screen 5 will move up and down alternately, thereby causing the filter screen 5 to vibrate and further enhancing the filtration efficiency of the filter screen 5 for medicinal powder.

[0052] Initially, spring 104 is compressed, and the bottom of scraper 102 is located at the center of scraper 102. During the reciprocating rotation of first gear 9, the mounting shaft 10 is driven to reciprocate. The mounting shaft 10 drives scraper 102 to reciprocate via telescopic rod 101. Since first gear 9, through the transmission of second gear 91 and third gear 92, drives fourth gear 93 to rotate in the opposite direction to first gear 9, when a part of the plane area of ​​filter screen 5 flips downward, scraper 102 moves toward the plane area of ​​filter screen 5 that is flipped downward. At the same time, under the restoring force of spring 104, scraper 102 is always kept in contact with the surface of filter screen 5, thereby pushing the uncrushed medicinal particles on the surface of filter screen 5 to the edge of the plane area of ​​filter screen 5 that is flipped downward, so that the uncrushed medicinal particles can obtain a greater initial velocity when they are projected.

[0053] As the scraper 102 reciprocates, it removes the medicinal powder adhering to the surface of the filter screen 5, preventing the powder from accumulating and clogging the filter pores. Furthermore, the reciprocating movement of the scraper 102 also agitates medicinal particles that are partially stuck in the filter pores; combined with the vibration generated during the reset process of the filter screen 5, this helps to dislodge the stuck particles. This further prevents clogging of the filter screen 5 and ensures it remains unobstructed.

[0054] In the process of pulverizing medicinal materials, the raw materials are first initially pulverized by two pulverizing rollers 33, and then further pulverized by pulverizing blades 22. At this time, the pulverized product contains both standard-sized and non-standard-sized medicinal material particles. The standard-sized particles are filtered through the filter screen 5 and fall into the collection frame 4. While the rotating shaft 21 drives the pulverizing blades 22 to pulverize the medicinal materials at high speed, the rotating shaft 21 simultaneously drives the filter screen 5 to intermittently rotate through a flipping device. During this process, the filter screen 5, in conjunction with the elastic component, throws the non-standard-sized medicinal material particles on its surface towards the pulverizing blades 22, allowing the pulverizing blades 22 to circulate and pulverize the non-standard-sized medicinal material particles. This forms a dynamic closed loop of screening, returning to the pulverizing area of ​​the pulverizing blades 22, and pulverizing again for non-standard-sized medicinal material particles, ensuring that all raw materials meet the preset particle size pulverization standard. At the same time, the flipping action of the filter screen 5 can also throw the qualified medicinal powder attached to its surface downwards, accelerate the separation of the crushed qualified powder from the filter screen, and improve the filtration efficiency; and during the process of the elastic component driving the filter screen 5 to reset, the filter screen 5 can also vibrate, further accelerating the filtration efficiency of the filter screen 5 for the crushed qualified medicinal powder.

[0055] In addition, the flipping device drives the filter screen 5 to flip through the gear set, while also driving the scraper 102 to move back and forth, so that the scraper 102 scrapes off the medicinal powder adhering to the surface of the filter screen 5, reducing the risk of filter screen 5 clogging; at the same time, the scraper 102 can push the un-crushed medicinal particles on the surface of the filter screen 5 to the edge of the downward flipping plane area of ​​the filter screen 5, so that the un-crushed medicinal particles can obtain a greater initial velocity when they are thrown.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A medicinal herb pulverizer, comprising a housing (1), characterized in that, The top of the box (1) is provided with a pulverizing component for pulverizing medicinal materials. A rotating shaft (21) located below the pulverizing component is rotatably installed inside the box (1). Pulverizing blades (22) are uniformly fixed around the outer circumference of the rotating shaft (21). A first motor (2) is fixedly installed in the box (1) and is fixedly connected to the rotating shaft (21). A filter screen (5) located below the pulverizing blades (22) is rotatably installed inside the box (1). The box (1) is provided with a flipping device for intermittently flipping the filter screen (5). The device is connected to the rotating shaft (21), and the housing (1) is equipped with an elastic component for driving the filter screen (5) to flip and reset. The first motor (2) drives the pulverizing blade (22) to rotate through the rotating shaft (21) to pulverize the medicinal materials. While the rotating shaft (21) rotates, the filter screen (5) is intermittently flipped through the flipping device. The filter screen (5) and the elastic component throw the medicinal materials whose surface particle size does not meet the pulverization standard toward the pulverizing blade (22), so that the pulverizing blade (22) circulates and pulverizes the medicinal materials whose particle size does not meet the pulverization standard. Both sides of the filter screen (5) are fixedly provided with connecting shafts (51), which are rotatably connected to the housing (1). A gear set is provided on the housing (1), and one of the connecting shafts (51) is connected to the gear set. The flipping device includes a transmission component and a reciprocating component. The transmission component is connected to the reciprocating component and the rotating shaft (21) respectively. A rack (84) is provided on the reciprocating component. The rack (84) meshes with the gear set when it contacts the gear set. The housing (1) is rotatably provided with an installation shaft (10), and a telescopic rod (101) is fixedly provided on the installation shaft (10). A scraper (102) is slidably sleeved on the telescopic rod (101). A spring (104) is fixedly provided between the scraper (102) and the telescopic rod (101). The bottom end of the scraper (102) abuts against the filter screen (5). The installation shaft (10) is connected to the gear set. The gear set includes a first gear (9), a second gear (91), a third gear (92) and a fourth gear (93) that are rotatably disposed on one side of the housing (1) and mesh in sequence. The first gear (9) is fixedly connected to the mounting shaft (10) and meshes with the rack (84) when in contact. The fourth gear (93) is fixedly connected to one of the connecting shafts (51).

2. The medicinal herb pulverizer according to claim 1, characterized in that, The transmission assembly includes a fixed plate (7) fixedly mounted on the housing (1) and a transmission shaft (71) rotatably mounted on the fixed plate (7). The transmission shaft (71) is fixedly mounted with a first bevel gear (72). One end of the rotating shaft (21) extends to the outside of the housing (1) and is fixedly mounted with a second bevel gear (73). The second bevel gear (73) meshes with the first bevel gear (72). The transmission shaft (71) is connected to the reciprocating assembly.

3. The medicinal herb pulverizer according to claim 2, characterized in that, The reciprocating assembly includes two connecting plates (8) fixedly mounted on the housing (1) and spaced apart. A reciprocating screw (81) is rotatably mounted between the two connecting plates (8). A slider (82) is threadedly connected to the outer circumference of the reciprocating screw (81). A guide rod (83) is fixedly mounted between the two connecting plates (8). The guide rod (83) is slidably connected to the slider (82). The bottom of the slider (82) is fixedly connected to the rack (84). A second pulley (85) is fixedly mounted on the reciprocating screw (81). A first pulley (86) is fixedly mounted on the drive shaft (71). A drive belt (87) is sleeved on the outer circumference of the first pulley (86) and the second pulley (85).

4. The medicinal herb pulverizer according to claim 1, characterized in that, The elastic component includes four springs (6) fixedly installed at the bottom of the filter screen (5). The four springs (6) correspond one-to-one with the four corners of the filter screen (5). A support plate (61) is fixedly installed at the bottom of the springs (6). The support plate (61) is fixedly connected to the box body (1).

5. The medicinal herb pulverizer according to claim 1, characterized in that, The pulverizing assembly includes a second motor (3) fixedly mounted on the housing (1) and two drive shafts (31) rotatably mounted on the top of the housing (1) and symmetrically arranged. The two drive shafts (31) are fixedly mounted with pulverizing rollers (33) that cooperate with each other to pulverize the medicinal materials. One end of each drive shaft (31) extends to the outside of the housing (1) and is fixedly mounted with a drive gear (32). The drive gears (32) on the two drive shafts (31) mesh with each other. The output end of the second motor (3) is fixedly connected to one of the drive shafts (31).

6. The medicinal herb pulverizer according to claim 1, characterized in that, The box (1) is symmetrically fixed with guide blocks (13) for guiding the upwardly thrown medicinal materials.

7. The medicinal herb pulverizer according to claim 1, characterized in that, A collection frame (4) is slidably provided at the bottom of the box (1), and a handle (41) is fixedly provided on one side of the collection frame (4).

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