A pill fractionating screening device

Abstract

The application discloses a pill grading and screening device. The automatic feeding mechanism stores pills, the pills enter the primary screening mechanism from the automatic feeding mechanism, the pills enter the secondary screening mechanism after being screened by the primary screening mechanism, the hopper is installed on the top of the feeding support, the hopper stores pills to be screened, the pill guide plate is connected to the bottom end of the hopper, the guide plate lifting mechanism drives the pill guide plate to swing up and down, the weighing assembly is installed on the guide plate lifting mechanism and used for measuring the weight of the pills, the two ends of the clamping module are connected with the clamping module bearing seat and the screen cage respectively, the output shaft of the rotating motor driving module is connected with the clamping module, the guide plate is fixedly installed on the upper portion of the support and is arranged in an inclined mode, the material frame linear driving module is installed on the upper portion of the support, and the material frame is movably installed on the material frame linear driving module. The application is convenient to disassemble and replace the screen cage with different screening sizes, all the pills can fully contact with the screening holes, and the qualified rate of finished pills is improved.

Description

Technical Field

[0001] This invention belongs to the field of screening machine technology, and in particular relates to a pill grading and screening device. Background Technology

[0002] Pill manufacturers typically grind, mix, and boil one or more medicinal herbs, then use a droplet-making technique to produce pills for patients to take orally for better therapeutic effects. During the manufacturing process, the size range of the pills is determined based on the physician's experience or through quantitative calculations. Pills exceeding the upper limit of pill size, i.e., excessively large, are called "large pills," while those exceeding the lower limit of pill size, i.e., excessively small, are called "small pills." Pills within the normal pill size range are called "finished pills."

[0003] Due to factors such as manufacturing processes, the size of some pills produced as dripping pills may deviate from the ideal size. Pills that are too large will result in excessive dosage, wasting medicinal materials and potentially harming the patient. Pills that are too small mean insufficient dosage, failing to achieve the desired therapeutic effect. Therefore, it is necessary to sieve the pills by size, removing those that are too large or too small.

[0004] The most common method for screening pills is sieve screening. The sieve has holes of a specific size. When the sieve vibrates, pills smaller than the hole size fall through, while pills larger than the hole size are retained because they cannot pass through. Therefore, when screening pills, two different sized sieves are generally used for two separate screenings to distinguish between large, small, and finished products. Currently, there are two main types of screening devices on the market: one is a vibrating sieve with a screen frame and the other is a rolling sieve with a drum.

[0005] The invention application with publication number CN107199171A discloses a pill screening machine that can screen pills of different sizes. It uses a motor to drive a toothed belt, which in turn drives the screening frame. The screening frame is equipped with a return spring. Through the action of the teeth on the belt and the return spring, the screening frame can rotate back and forth slightly, achieving an effect similar to vibration screening.

[0006] Chinese patent application CN105057208A discloses a pill screening machine capable of screening pills of different sizes. In use, pills are first added to a first drum, which is then manually driven to rotate, screening out pills that are too small (small particles). The remaining finished product and the mixture of oversized pills are then poured into a second drum, which is again manually driven to separate the finished product from the oversized pills (large particles). This pill screening device can separate small particles, finished product, and large particles in one operation.

[0007] Compared to manual screening, the aforementioned pill screening equipment has improved automation, but it still has shortcomings in screening methods and structural design: 1. Whether using vibrating or rolling screening, when a large number of pills are added, only the bottom layer can contact the screening surface. The upper layers of pills remain on the top layer during screening, making them difficult to screen. The finished product contains unqualified material, i.e., the proportion of small and large particles exceeds the standard, failing to meet the requirements for pill production. Further separation and screening by experienced personnel is still necessary. 2. Cylinder screening devices can hold a large number of pills at once, but the screen holes are easily deformed during the bending of the thin plate into a cylindrical shape, affecting the pass rate of the screened pills. This could be improved by designing a polygonal cylinder, requiring only bending of a few areas of the thin plate during manufacturing, while maintaining the flatness of the areas with screen holes, thus avoiding deformation. However, existing technology lacks a multi-motor driven composite motion pill screening device that can effectively improve screening efficiency and pass rate. Summary of the Invention

[0008] To address the problems existing in the background art, the present invention aims to provide a pill grading and screening device. This device mainly consists of an automatic feeding mechanism, a primary screening mechanism, and a secondary screening mechanism. The automatic feeding mechanism can automatically and quantitatively add pills; the primary screening mechanism is responsible for separating small particles from the raw materials; and the secondary screening mechanism, based on the small particle screening device, further separates large particles from the finished product.

[0009] The technical solution adopted in this invention is as follows:

[0010] The device includes an automatic feeding mechanism, a primary screening mechanism, and a secondary screening mechanism. The primary screening mechanism is located between the automatic feeding mechanism and the secondary screening mechanism. The automatic feeding mechanism stores pills and has a pill outlet at its top. The primary screening mechanism is located directly below the pill outlet in the automatic feeding mechanism, allowing pills to enter the primary screening mechanism from the automatic feeding mechanism. The primary screening mechanism has a pill outlet at its upper part. The secondary screening mechanism is located directly below the pill outlet in the secondary screening mechanism. After being screened by the primary screening mechanism, the pills enter the secondary screening mechanism.

[0011] The automatic feeding mechanism includes a feeding bracket, a pill guide plate lifting assembly, a pill guide plate, a hopper, and a weighing assembly. The feeding bracket is a three-dimensional frame structure with a slot at the top. The hopper is fixedly installed in the slot at the top of the feeding bracket. The hopper, which is open at both the top and bottom, stores pills to be screened. The pill guide plate is located in a through hole at the top of the feeding bracket and is connected to the bottom of the hopper, allowing it to swing up and down. The guide plate lifting mechanism is fixedly installed at the top of the feeding bracket and is connected to the pill guide plate, so that the guide plate lifting mechanism drives the pill guide plate to swing up and down. The pills in the hopper fall into the primary screening mechanism through the pill guide plate. The weighing assembly is located below the pill guide plate and is installed on the guide plate lifting mechanism. The weighing assembly is used to quantitatively measure the weight of the pills falling from the hopper into the primary screening mechanism.

[0012] The primary screening mechanism includes a first screen cage, a primary material frame linear drive module, a first support, a first guide plate, a primary material frame, and a first drive module. The first screen cage is movably mounted on top of the first support via the first drive module. The first guide plate is located directly below the first screen cage and fixedly mounted on the upper part of the first support. The first guide plate is inclined. The primary material frame linear drive module and the primary material frame are both located between the first screen cage and the first guide plate. The primary material frame linear drive module is mounted on the upper part of the first support. The primary material frame is movably mounted on the primary material frame linear drive module along the axial direction of the guide rail of the primary material frame linear drive module. The primary material frame linear drive module is used to drive the primary material frame to move axially along the guide rail of the primary material frame linear drive module.

[0013] The first drive module includes a first swing motor drive module, a first rotation motor drive module, a first U-shaped bracket support, a first U-shaped bracket, a first clamping module, and a first clamping module bearing seat. The first swing motor drive module and the first U-shaped bracket support are both fixedly mounted on the first bracket. The two ends of the first U-shaped bracket are movably mounted on the first bracket through the first U-shaped bracket support. The first U-shaped bracket and the first swing motor drive module are connected. A through hole is provided in the middle of the first U-shaped bracket. The first clamping module bearing seat and the first rotation motor drive module are respectively fixedly mounted on both sides of the first U-shaped bracket along the axial direction of the first screen cage. One end of the first clamping module can be rotatably mounted on the first clamping module bearing seat along the circumference of the first screen cage. The other end of the first clamping module clamps the first screen cage. The output shaft of the first rotation motor drive module passes through the through hole in the middle of the first U-shaped bracket and is fixedly connected to one end of the first clamping module.

[0014] The secondary screening mechanism includes a second screen cage, a linear drive module for the finished product frame, a second bracket, a second guide plate, the finished product frame, a second swing motor drive module, a second rotary motor drive module, a second U-shaped bracket support, a second U-shaped bracket, a second clamping module, and a bearing seat for the second clamping module. The second swing motor drive module and the second U-shaped bracket support are both fixedly installed on the top of the second bracket. The two ends of the second U-shaped bracket are movably installed on the second bracket through the second U-shaped bracket support. The second U-shaped bracket and the second swing motor drive module are connected.

[0015] The second U-shaped bracket has a through hole in the middle. The second clamping module bearing seat and the second rotating motor drive module are respectively fixedly installed on both sides of the second U-shaped bracket along the axial direction of the second screen cage. One end of the second clamping module can be rotatably installed on the bearing seat of the second clamping module along the circumference of the second screen cage. The other end of the second clamping module clamps the second screen cage. The output shaft of the second rotating motor drive module passes through the through hole in the middle of the second U-shaped bracket and is fixedly connected to one end of the second clamping module.

[0016] The second guide plate is located directly below the second screen cage and is fixedly installed on the upper part of the second bracket. The second guide plate is inclined. The finished product frame linear drive module and the finished product frame are both located between the second screen cage and the second guide plate. The finished product frame linear drive module is fixedly installed on the upper part of the second bracket. The finished product frame can be movably installed on the finished product frame linear drive module along the axial direction of the finished product frame linear drive module guide rail. The finished product frame linear drive module is used to drive the finished product frame to move axially along the finished product frame linear drive module guide rail.

[0017] The first and second sieve cages are mainly composed of sieve cage baffles, sieve cage sidewalls, sieve cage shaft plates, spiral groove plates, and vertical groove plates. The sieve cage baffles, sieve cage sidewalls, and sieve cage shaft plates form a polygonal hollow column structure. The sieve cage baffles and sieve cage shaft plates are respectively fixedly installed on both sides of the sieve cage sidewalls. A connecting shaft is fixedly installed on the sieve cage shaft plate. The connecting shafts in the first and second sieve cages are respectively clamped in the first clamping module and the second clamping module. The spiral groove plates and vertical groove plates are both fixedly connected inside the polygonal hollow column structure.

[0018] The sieve cage has sieve holes on its side wall for sieving out pills, and a strip-shaped through groove arranged along its own axis on the side wall of the sieve cage serves as the feeding and discharging port of the first sieve cage / second sieve cage.

[0019] The first U-shaped bracket and the second U-shaped bracket are mainly composed of a crossbeam, a flange shaft, and a flange. The two flanges are fixedly installed at both ends of the crossbeam, and the two flanges are fixedly connected to the two flange shafts. The flange shafts at both ends of the crossbeam can be rotatably connected to the first U-shaped bracket support seat / second U-shaped bracket support seat around their own axial direction. The output shaft of the first swing motor drive module passes through the first bracket and is coaxially fixedly connected to the flange shaft of the first U-shaped bracket. The output shaft of the second swing motor drive module passes through the second bracket and is coaxially fixedly connected to the flange shaft on the second U-shaped bracket.

[0020] Of the feeding support, the first support, and the second support, the feeding support has the highest height, and the second support has the lowest height; the sieve aperture on the first sieve cage is smaller than the sieve aperture in the second sieve cage.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. Compared to existing single-stage screening devices, the present invention utilizes a two-stage screening device in series to screen large materials, finished materials, and small materials in one go, avoiding the inconvenience of repeatedly changing screen cages (screens). The present invention uses a fixture design that is easy to disassemble, facilitating the disassembly and replacement of screen cages of different screening sizes.

[0023] 2. The spiral groove plate designed in this invention pushes the pills back and forth in the sieve cage during the screening process, so that the pills have more sufficient contact with the screening surface; the vertical groove plate can fully tumble the pills during the screening process, so that all the pills can fully contact the screening holes, thereby improving the qualified rate of the finished pills.

[0024] 3. The dual-motor drive designed in this invention provides the screen cage (screen) with two degrees of freedom in two directions. Compared with the single-motor screening device with a single rolling screening action, the dual motor can superimpose oscillating screening on the basis of ordinary rolling screening, thereby improving the screening qualification rate. Attached Figure Description

[0025] Figure 1 This is a three-dimensional diagram of the present invention;

[0026] Figure 2 This is a 3D diagram of the automatic feeding mechanism;

[0027] Figure 3 This is a schematic diagram of the automatic feeding mechanism lifting the pill guide plate;

[0028] Figure 4 It is a 3D diagram of the primary screening organization;

[0029] Figure 5 This is a top-down 3D schematic diagram of a primary screening facility;

[0030] Figure 6 This is a partial view of the primary screening facility;

[0031] Figure 7 This is a schematic diagram of the oscillation of the screen cage;

[0032] Figure 8 It is a three-dimensional schematic diagram of the oscillation of the screen cage;

[0033] Figure 9 It is a 3D diagram of the screen cage;

[0034] Figure 10 This is a radial cross-sectional view of the screen cage;

[0035] Figure 11 This is an axial cross-sectional view of the screen cage;

[0036] Figure 12 This is a schematic diagram of a U-shaped bracket;

[0037] Figure 13 It is a 3D diagram of the secondary screening facility;

[0038] Figure 14 This is a top-down 3D view of the secondary screening facility;

[0039] Figure 15 This is a partial view of the secondary screening mechanism.

[0040] In the diagram: 1. Automatic feeding mechanism; 2. Primary screening mechanism; 3. Secondary screening mechanism; 101. Feeding bracket; 102. Pill guide plate lifting assembly; 103. Pill guide plate; 104. Material bin; 105. Weighing assembly; 201. First screen cage; 202. Primary material frame linear drive module; 203. First bracket; 204. First guide plate; 205. Primary material frame; 206. First swing motor drive module; 207. First rotation motor drive module; 208. First U-shaped bracket support seat; 209. First U-shaped bracket; 210. First clamping module; 211. First clamping module bearing seat. 20101, Screen cage baffle; 20102, Screen cage sidewall; 20103, Screen cage shaft plate; 20104, Spiral groove plate; 20105, Vertical groove plate; 20901, Crossbeam; 20902, Flange shaft; 20903, Flange; 301, Second screen cage; 302, Finished product frame linear drive module; 303, Second bracket; 304, Second guide plate; 305, Finished product frame; 306, Second swing motor drive module; 307, Second rotation motor drive module; 308, Second U-shaped bracket support seat; 309, Second U-shaped bracket; 310, Second clamping module; 311, Second clamping module bearing seat; 312, Secondary material frame. Detailed Implementation

[0041] The present invention will be described in detail below with reference to specific implementation examples. These examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0042] like Figure 1 As shown, the device includes an automatic feeding mechanism 1, a primary screening mechanism 2, and a secondary screening mechanism 3. All three mechanisms are placed on the ground. The primary screening mechanism 2 is located between the automatic feeding mechanism 1 and the secondary screening mechanism 3. The automatic feeding mechanism 1 stores pills, and a pill outlet is located at its top. The primary screening mechanism 2 is positioned directly below the pill outlet in the automatic feeding mechanism 1, allowing pills to enter the primary screening mechanism 2 from the automatic feeding mechanism 1. A pill outlet is located at the top of the primary screening mechanism 2. The secondary screening mechanism 3 is positioned directly below the pill outlet in the secondary screening mechanism 3. After being screened by the primary screening mechanism 2, the pills enter the secondary screening mechanism 3.

[0043] The automatic feeding mechanism 1 can add a quantitative amount of pills to the primary screening mechanism 2. The primary screening mechanism 2 will screen out the small particles in the pills, and then the remaining pills will be added to the secondary screening mechanism 3 for further screening to separate the finished product and the large particles. The automatic feeding mechanism 1, the primary screening mechanism 2 and the secondary screening mechanism 3 are arranged in sequence from back to front. The front direction of the device is the direction closer to the secondary screening mechanism 3, and the rear direction of the device is the direction closer to the automatic feeding mechanism 1.

[0044] like Figure 2 and Figure 3As shown, the automatic feeding mechanism 1 includes a feeding support 101, a pill guide plate lifting assembly 102, a pill guide plate 103, a hopper 104, and a weighing assembly 105. The feeding support 101 is a three-dimensional frame structure with a slot at the top. The hopper 104 is fixedly installed in the slot at the top of the feeding support 101. The hopper 104, which is open at both the top and bottom, stores a large number of pills to be screened. The pill guide plate 103 is located in the through hole at the top of the feeding support 101 and is connected to the bottom of the hopper 104 in a way that allows it to swing up and down. The pill guide plate 103 is arranged along the front-to-back direction of the device. The guide plate lifting mechanism 102 is fixedly installed at the top of the feeding support 101. The lifting mechanism 102 and the pill guide plate 103 are connected, so that the lifting mechanism 102 drives the pill guide plate 103 to swing up and down. The pills in the hopper 104 fall into the primary screening mechanism 2 through the pill guide plate 103. The lifting mechanism 102 can control the pill guide plate 103 to be raised or lowered. The weighing component 105 is located below the pill guide plate 103 and is installed on the lifting mechanism 102. The weighing component 105 is used to quantitatively measure the weight of the pills falling from the hopper 104 into the primary screening mechanism 2. Thus, each time the material is added, the pill guide plate 103, in conjunction with the weighing component 105, adds a quantitative amount of pills to be screened into the primary screening mechanism 2.

[0045] like Figure 4 and Figure 5 As shown, the primary screening mechanism 2 includes a first screen cage 201, a primary material frame linear drive module 202, a first support 203, a first guide plate 204, a primary material frame 205, and a first drive module. The first screen cage 201 is movably mounted on top of the first support 203 via the first drive module. The first guide plate 204 is located directly below the first screen cage 201 and fixedly mounted on the upper part of the first support 203. The first guide plate 204 is inclined. The primary material frame linear drive module 202 and the primary material frame 205... 5 are located between the first screen cage 201 and the first guide plate 204. The first-stage material frame linear drive module 202 is installed on the upper part of the first bracket 203. The first-stage material frame linear drive module 202 is arranged along the left and right direction of the device. The first-stage material frame 205 is movably installed on the first-stage material frame linear drive module 202 along the axial direction of the guide rail of the first-stage material frame linear drive module 202. The first-stage material frame linear drive module 202 is used to drive the first-stage material frame 205 to move axially along the guide rail of the first-stage material frame linear drive module 202.

[0046] During material screening, the primary screening mechanism 2 has its primary material frame 205 positioned directly below the first screen cage 201, receiving small pieces falling from the first screen cage 201. Once enough small pieces have been collected, the primary material frame linear drive module 202 pushes the primary material frame 205 away from below the first screen cage 201, moving it to the other end of the guide rail of the primary material frame linear drive module 202 for manual collection. Then, the first screen cage 201 rotates so that the feeding and discharging ports face downwards, pouring the pills left in the first screen cage 201 onto the first guide plate 204 fixed on the first support 203. The first guide plate 204 is tilted, and the pills automatically flow into the secondary screening mechanism 3 for further screening.

[0047] like Figure 6 As shown, the first drive module includes a first swing motor drive module 206, a first rotation motor drive module 207, a first U-shaped bracket support 208, a first U-shaped bracket 209, a first clamping module 210, and a first clamping module bearing seat 211. The first swing motor drive module 206 and the first U-shaped bracket support 208 are both fixedly mounted on the first bracket 203. The front and rear ends of the first U-shaped bracket 209 are movably mounted on the first bracket 203 via the first U-shaped bracket support 208. The first U-shaped bracket 209 is connected to the first swing motor drive module 206. A through hole is provided in the middle of the first U-shaped bracket 209. The first clamping module... The block bearing seat 211 and the first rotating motor drive module 207 are coaxially fixedly installed on the left and right sides of the first U-shaped bracket 209 along the axial direction of the first screen cage 201, respectively. One end of the first clamping module 210 is rotatably mounted on the first clamping module bearing seat 211 along the circumference of the first screen cage 201, and the other end of the first clamping module 210 clamps the first screen cage 201. The output shaft of the first rotating motor drive module 207 passes through the through hole in the middle of the first U-shaped bracket 209 and is fixedly connected to one end of the first clamping module 210. The first rotating motor drive module 207 drives the first screen cage 201 to rotate along its own circumference through the first clamping module 210.

[0048] like Figures 13-15 As shown, the secondary screening mechanism 3 includes a second screen cage 301, a finished product frame linear drive module 302, a second bracket 303, a second guide plate 304, a finished product frame 305, a second swing motor drive module 306, a second rotation motor drive module 307, a second U-shaped bracket support 308, a second U-shaped bracket 309, a second clamping module 310, and a second clamping module bearing seat 311. The second swing motor drive module 306 and the second U-shaped bracket support 308 are both fixedly installed on the top of the second bracket 303. The front and rear ends of the second U-shaped bracket 309 are movably installed on the second bracket 303 through the second U-shaped bracket support 308. The second U-shaped bracket 309 and the second swing motor drive module 306 are connected.

[0049] The second U-shaped bracket 309 has a through hole in the middle. The second clamping module bearing seat 311 and the second rotary motor drive module 307 are coaxially fixedly installed on the left and right sides of the second U-shaped bracket 309 along the axial direction of the second screen cage 301, respectively. One end of the second clamping module 310 is rotatably mounted on the second clamping module bearing seat 311 along the circumference of the second screen cage 301. The other end of the second clamping module 310 clamps the second screen cage 301. The output shaft of the second rotary motor drive module 307 passes through the through hole in the middle of the second U-shaped bracket 309 and is fixedly connected to one end of the second clamping module 310. The second rotary motor drive module 307 drives the second screen cage 301 to rotate along its own circumference through the second clamping module 310.

[0050] The second guide plate 304 is located directly below the second screen cage 301 and is fixedly installed on the upper part of the second bracket 303. The second guide plate 304 is inclined. The finished product frame linear drive module 302 and the finished product frame 305 are both located between the second screen cage 301 and the second guide plate 304. The finished product frame linear drive module 302 is fixedly installed on the upper part of the second bracket 303. The finished product frame linear drive module 302 is arranged along the left and right direction of the device. The finished product frame 305 is movably installed on the finished product frame linear drive module 302 along the axial direction of the guide rail of the finished product frame linear drive module 302. The finished product frame linear drive module 302 is used to drive the finished product frame 305 to move axially along the guide rail of the finished product frame linear drive module 302.

[0051] Both the primary material frame linear drive module 202 and the finished product material frame linear drive module 302 are equipped with guide rails, which are arranged along the left and right directions of the device.

[0052] like Figures 9-11As shown, both the first sieve cage 201 and the second sieve cage 301 are mainly composed of a sieve cage baffle 20101, a sieve cage side wall 20102, a sieve cage shaft plate 20103, a spiral groove plate 20104, and a vertical groove plate 20105. The sieve cage baffle 20101, the sieve cage side wall 20102, and the sieve cage shaft plate 20103 form a polygonal hollow column structure. The sieve cage baffle 20101 and the sieve cage shaft plate 20103 are respectively fixedly installed on both sides of the sieve cage side wall 20102. The sieve cage baffle 20101 and the sieve cage shaft plate 20103 are used to close the sieve cages 201 and 301. 1. A connecting shaft is fixedly installed on the screen cage shaft plate 20103. The connecting shaft on the screen cage shaft plate 20103 in the first screen cage 201 and the second screen cage 301 is clamped in the first clamping module 210 and the second clamping module 310 respectively. The connecting shaft is used to fix the screen cages 201 and 301 on the clamping modules 210 and 310. The spiral groove plate 20104 and the vertical groove plate 20105 are both fixedly connected inside the polygonal hollow column structure. The spiral groove plate 20104 and the vertical groove plate 20105 are both arranged along the axial direction of the screen cages 201 and 301.

[0053] The side wall 20102 of the sieve cage is provided with sieve holes for screening out pills. The diameter of the pills to be screened out is smaller than the diameter of the sieve holes. The side wall 20102 of the sieve cage is provided with a strip-shaped through groove arranged along its own axis as the feeding and discharging port of the first sieve cage 201 / second sieve cage 301. The pills that have not been screened in the primary screening mechanism 2 are poured into the secondary screening mechanism 3 through the feeding and discharging port. The pills that have not been screened in the secondary screening mechanism 3 are poured into the external secondary material frame 312 through the feeding and discharging port.

[0054] The side wall 20102 of the sieve cage is a polygonal side wall plate formed by bending a thin plate with sieve holes of a specific size. Taking an octagon as an example, seven of its faces are sieve plates with sieve holes, and the remaining face is not equipped with a sieve plate and is used to add or pour out pills, which is called the feeding / discharging port. The automatic feeding mechanism 1 adds pills to the sieve cage 201 through the feeding / discharging port, and the sieve cage 201 pours pills into the sieve cage 301 through the feeding / discharging port. The polygonal design of the side wall 20102 of the sieve cage gives the sieve cages 201 and 301 the characteristic of the sieve holes not deforming during the processing of the square frame screening device, while also having the advantage of the large capacity of the cylindrical screening device.

[0055] Vertical groove plates 20105 are arranged at intervals along the circumference of sieve cages 201 and 301. Vertical groove plates 20105 are designed to assist in stirring the pills. During the rotation of sieve cages 201 and 301, vertical groove plates 20105 can flip the bottom pills to the upper layer, solving the problem that the middle and upper pills cannot contact the screening holes during the screening process.

[0056] The spiral groove plate 20104 is designed to propel the pills within the sieve cages 201 and 301, increasing the contact opportunity between the pills and the sieve holes. When the rotary motor drive modules 207 and 307 drive the sieve cages 201 and 301 to rotate forward, the internal spiral groove plate 20104 propels the pills forward along the axis within the sieve cages 201 and 301; when rotating in the reverse direction, it propels the pills back along the axis. As the rotary motor drive module 207 continuously rotates forward and backward, the pills reciprocate within the sieve cages 201 and 301, repeatedly contacting the sieve holes on the side wall 20102 of the sieve cage. The lower layer of pills in contact with the side wall 20102 of the sieve cage can be fully screened. Combined with the agitation of the pills by the vertical groove plate 20105, all pills can be fully screened.

[0057] like Figure 12 As shown, U-shaped supports 209 and 309 are arranged along the front-rear direction of the device. Both the first U-shaped support 209 and the second U-shaped support 309 are mainly composed of a crossbeam 20901, a flange shaft 20902, and a flange 20903. The two flanges 20903 are fixedly installed at both ends of the crossbeam 20901, and are fixedly connected to the two flange shafts 20902. The flange shafts 20902 located at both ends of the crossbeam 20901 can be rotatably connected to the bearings of the first U-shaped support base 208 / second U-shaped support base 308 around their own axial direction. That is, the first U-shaped support 209 and the second U-shaped support 309... The flange shaft 20902 on the 9 is movably connected to the bearings of the first U-shaped bracket support 208 and the second U-shaped bracket support 308 respectively. The output shaft of the first swing motor drive module 206 passes through the first bracket 203 and is coaxially and fixedly connected to the flange shaft 20902 of the first U-shaped bracket 209. The output shaft of the second swing motor drive module 306 passes through the second bracket 303 and is coaxially and fixedly connected to the flange shaft 20902 on the second U-shaped bracket 309. The swing motor drive modules 206 and 306 are used to drive the U-shaped brackets 209 and 309 to rotate around their own circumference, thereby driving the screen cages 201 and 301 to swing up and down.

[0058] The swing motor drive modules 206 and 306 and the rotation motor drive modules 207 and 307 are all composed of servo motors and reducers. For example... Figure 7 and Figure 8As shown, the swing motor drive modules 206 and 306 operate in a small-amplitude, rapid reciprocating rotation mode, driving the sieve cages 201 and 301 to swing rapidly in the vertical plane, simulating the process of manually shaking the sieve frame. By controlling the rotation speed and rotation angle of the swing motor drive modules 206 and 306, swing intensities of different degrees can be obtained. The first rotary motor drive modules 207 and 307 operate in a reciprocating rotation mode within a certain angle range, causing the sieve cages 201 and 301 to swing while simultaneously rotating within a certain angle range. This fully tumbles the pills inside the sieve cages, ensuring full contact between the pills and the sieve holes and preventing leakage.

[0059] like Figure 5 and Figure 14 As shown, the primary screening mechanism 2 and the secondary screening mechanism 3 have similar structures, differing only in the height of the supports 203 and 303 and the size of the screening holes in the screen cages 201 and 301. The primary screening mechanism 2 can automatically collect the screened small materials. The first screen cage 201 is located directly below the outlet of the pill guide plate 103, and the second screen cage 301 is located directly below the outlet of the first guide plate 204.

[0060] Among the feeding support 101, the first support 203, and the second support 303, the feeding support 101 has the highest height, and the second support 303 has the lowest height; the sieve hole diameter on the first sieve cage 201 is smaller than the sieve hole diameter in the second sieve cage 301.

[0061] Specific embodiments of the present invention are described below with reference to the accompanying drawings:

[0062] The first step is the pill feeding process. First, the pills to be screened are added to the hopper 104 of the automatic feeding mechanism 1. The pill guide plate lifting assembly 102 raises the pill guide plate 103, ensuring the outlet of the pill guide plate 103 faces upwards to prevent pill leakage. Figure 3 As shown, at this time, the silo 104 contains pills to be screened.

[0063] Then, the automatic feeding mechanism 1 adds pills to the primary screening mechanism 2. The pill guide plate lifting assembly 102 lowers the pill guide plate 103, so that the outlet of the pill guide plate 103 faces the feeding and discharging port of the screen cage 201 of the primary screening mechanism 2. The pills flow into the screen cage 201 along the pill guide plate 103. Figure 1 As shown. The weighing component 105 can detect the mass of the added pills to be screened. After adding an appropriate amount of pills, the pill guide plate lifting component 102 lifts the pill guide plate 103 to stop feeding.

[0064] At this time, the primary screening mechanism 2 begins to prepare for screening. The material frame 205, pushed by the linear drive module 202, returns to directly below the screen cage 201, ready to receive the falling pills. Figure 5As shown. Then the oscillating motor drive module 206 and the rotating motor drive module 207 start working, and the screen cage 201 oscillates up and down while reciprocating within a certain angle range, as shown. Figure 7 and Figure 8 As shown, the spiral groove plate 20104 and the vertical groove plate 20105 work together to make the pills move and tumble continuously. Pills smaller than the screening hole size in the first sieve cage 201 are gradually screened out and fall into the material frame 205. When the first-stage material frame 205 collects enough small materials, the first-stage material frame linear drive module 202 pushes the first-stage material frame 205 away from below the sieve cage 201. At this time, the screened small materials can be collected manually. Then, the rotating motor drive module 207 drives the sieve cage 201 to rotate so that the feeding outlet faces downward. The pills fall onto the guide plate 204 and flow into the second-stage screening mechanism 3 for further screening, such as... Figure 6 As shown.

[0065] The structure of the secondary screening mechanism 3 is similar to that of the primary screening mechanism 2, except that the screen aperture size of the screen cage 301 is different from that of the screen cage 201. After the mixture of large materials and finished materials enters the screen cage 301, the swing motor drive module 306 and the rotation motor drive module 307 of the secondary screening mechanism 3 start working, driving the screen cage 301 to reciprocate and swing up and down within a certain angle range. The finished materials are gradually screened out and fall into the finished material frame 305. When the finished material frame 305 collects enough small materials, the finished material frame linear drive module 302 drives the finished material frame 305 away from below the screen cage 301, such as... Figure 13 and Figure 14 As shown, the finished product can be collected manually at this point. Then, the motor drive module 307 is rotated to rotate the screen cage 301 until the feeding and discharging port faces downwards, and the pills fall onto the guide plate 304 and flow into the secondary material frame 312. At this point, the next round of pill screening can begin.

Claims

1. A pill grading and screening device, characterized in that: It includes an automatic feeding mechanism (1), a primary screening mechanism (2) and a secondary screening mechanism (3); the primary screening mechanism (2) is located between the automatic feeding mechanism (1) and the secondary screening mechanism (3). The automatic feeding mechanism (1) stores pills. The top of the automatic feeding mechanism (1) is provided with a pill outlet. The primary screening mechanism (2) is located directly below the pill outlet in the automatic feeding mechanism (1), so that the pills enter the primary screening mechanism (2) from the automatic feeding mechanism (1). The upper part of the primary screening mechanism (2) is provided with a pill outlet. The secondary screening mechanism (3) is located directly below the pill outlet in the primary screening mechanism (2). The pills enter the secondary screening mechanism (3) after being screened by the primary screening mechanism (2). The primary screening mechanism (2) includes a first screen cage (201), a primary material frame linear drive module (202), a first support (203), a first guide plate (204), a primary material frame (205), and a first drive module; the first screen cage (201) is movably mounted on the top of the first support (203) via the first drive module, the first guide plate (204) is located directly below the first screen cage (201) and fixedly mounted on the upper part of the first support (203), the first guide plate (204) is inclined, and the primary material frame linear drive... The module (202) and the primary material frame (205) are both located between the first screen cage (201) and the first guide plate (204). The primary material frame linear drive module (202) is installed on the upper part of the first bracket (203). The primary material frame (205) can be axially moved along the guide rail of the primary material frame linear drive module (202) and is installed on the primary material frame linear drive module (202). The primary material frame linear drive module (202) is used to drive the primary material frame (205) to move axially along the guide rail of the primary material frame linear drive module (202). The secondary screening mechanism (3) includes a second screen cage (301), a finished product frame linear drive module (302), a second bracket (303), a second guide plate (304), a finished product frame (305), a second swing motor drive module (306), a second rotation motor drive module (307), a second U-shaped bracket support seat (308), a second U-shaped bracket (309), a second clamping module (310), and a second clamping module bearing seat (311). The second swing motor drive module (306) and the second U-shaped bracket support seat (308) are both fixedly installed on the top of the second bracket (303). The two ends of the second U-shaped bracket (309) are movably installed on the second bracket (303) through the second U-shaped bracket support seat (308). The second U-shaped bracket (309) and the second swing motor drive module (306) are connected. The second U-shaped bracket (309) has a through hole in the middle. The second clamping module bearing seat (311) and the second rotary motor drive module (307) are fixedly installed on both sides of the second U-shaped bracket (309) along the axial direction of the second screen cage (301). One end of the second clamping module (310) can be rotatably installed on the second clamping module bearing seat (311) along the circumference of the second screen cage (301). The other end of the second clamping module (310) clamps the second screen cage (301). The output shaft of the second rotary motor drive module (307) passes through the through hole in the middle of the second U-shaped bracket (309) and is fixedly connected to one end of the second clamping module (310). The second guide plate (304) is located directly below the second screen cage (301) and is fixedly installed on the upper part of the second bracket (303). The second guide plate (304) is inclined. The finished product frame linear drive module (302) and the finished product frame (305) are both located between the second screen cage (301) and the second guide plate (304). The finished product frame linear drive module (302) is fixedly installed on the upper part of the second bracket (303). The finished product frame (305) can be movably installed on the finished product frame linear drive module (302) along the axial direction of the guide rail of the finished product frame linear drive module (302). The finished product frame linear drive module (302) is used to drive the finished product frame (305) to move axially along the guide rail of the finished product frame linear drive module (302).

2. The pill grading and screening device according to claim 1, characterized in that: The automatic feeding mechanism (1) includes a feeding bracket (101), a pill guide plate lifting assembly (102), a pill guide plate (103), a hopper (104), and a weighing assembly (105). The feeding bracket (101) is a three-dimensional frame structure with a slot at the top. The hopper (104) is fixedly installed in the slot at the top of the feeding bracket (101). The hopper (104), which is open at both the top and bottom, stores pills to be screened. The pill guide plate (103) is located in the through hole at the top of the feeding bracket (101) and is connected to the bottom of the hopper (104) in a way that allows it to swing up and down. The pill guide plate lifting assembly... The component (102) is fixedly installed on the upper part of the feeding bracket (101). The pill guide plate lifting assembly (102) and the pill guide plate (103) are connected, so that the pill guide plate lifting assembly (102) drives the pill guide plate (103) to swing up and down. The pills in the hopper (104) fall into the primary screening mechanism (2) through the pill guide plate (103). The weighing component (105) is located below the pill guide plate (103) and installed on the pill guide plate lifting assembly (102). The weighing component (105) is used to quantitatively measure the weight of the pills falling from the hopper (104) into the primary screening mechanism (2).

3. The pill grading and screening device according to claim 1, characterized in that: The first drive module includes a first swing motor drive module (206), a first rotation motor drive module (207), a first U-shaped bracket support (208), a first U-shaped bracket (209), a first clamping module (210), and a first clamping module bearing seat (211). The first swing motor drive module (206) and the first U-shaped bracket support (208) are both fixedly mounted on the first bracket (203). The two ends of the first U-shaped bracket (209) are movably mounted on the first bracket (203) through the first U-shaped bracket support (208). The first U-shaped bracket (209) and the first swing motor drive module (206) are connected. The first U-shaped bracket (209) has a through hole in the middle. The first clamping module bearing seat (211) and the first rotating motor drive module (207) are fixedly installed on both sides of the first U-shaped bracket (209) along the axial direction of the first screen cage (201). One end of the first clamping module (210) can be rotatably installed on the first clamping module bearing seat (211) along the circumference of the first screen cage (201). The other end of the first clamping module (210) clamps the first screen cage (201). The output shaft of the first rotating motor drive module (207) passes through the through hole in the middle of the first U-shaped bracket (209) and is fixedly connected to one end of the first clamping module (210).

4. The pill grading and screening device according to claim 1, characterized in that: The first sieve cage (201) and the second sieve cage (301) are both composed of a sieve cage baffle (20101), a sieve cage sidewall (20102), a sieve cage shaft plate (20103), a spiral groove plate (20104), and a vertical groove plate (20105); the sieve cage baffle (20101), the sieve cage sidewall (20102), and the sieve cage shaft plate (20103) form a polygonal hollow column structure, and the sieve cage baffle (20101) and the sieve cage shaft plate (305) form a polygonal hollow column structure. Plates (20103) are fixedly installed on both sides of the side wall (20102) of the screen cage, and connecting shafts are fixedly installed on the screen cage shaft plate (20103). The connecting shafts in the first screen cage (201) and the second screen cage (301) are respectively clamped in the first clamping module (210) and the second clamping module (310). The spiral groove plate (20104) and the vertical groove plate (20105) are both fixedly connected to the inside of the polygonal hollow column structure. The side wall (20102) of the sieve cage is provided with sieve holes for screening out pills, and the side wall (20102) of the sieve cage is provided with a strip-shaped through groove arranged along its own axis as the feeding and discharging port of the first sieve cage (201) / second sieve cage (301).

5. The pill grading and screening device according to claim 1, characterized in that: Both the first U-shaped bracket (209) and the second U-shaped bracket (309) consist of a crossbeam (20901), a flange shaft (20902), and a flange (20903). The two flanges (20903) are fixedly installed at both ends of the crossbeam (20901), and the two flanges (20903) are fixedly connected to the two flange shafts (20902). The flange shafts (20902) located at both ends of the crossbeam (20901) can rotate around their own axial direction. Connected to the first U-shaped bracket support (208) / the second U-shaped bracket support (308), the output shaft of the first swing motor drive module (206) passes through the first bracket (203) and is coaxially fixedly connected to the flange shaft (20902) of the first U-shaped bracket (209). The output shaft of the second swing motor drive module (306) passes through the second bracket (303) and is coaxially fixedly connected to the flange shaft (20902) on the second U-shaped bracket (309).

6. The pill grading and screening device according to claim 1, characterized in that: Among the feeding support (101), the first support (203), and the second support (303), the feeding support (101) has the highest height, and the second support (303) has the lowest height; the sieve hole diameter on the first sieve cage (201) is smaller than the sieve hole diameter in the second sieve cage (301).

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