A tablet filling device

Abstract

The utility model relates to pharmaceutical equipment technical field especially relates to a kind of tablet filling device, comprising: vibrating disc, vacuum shaft and drive assembly, vibrating disc has multiple rows of shunt grooves;Vacuum shaft includes air supply middle shaft, and rotatable sleeve set on the air supply middle shaft, multiple rows of grooves are evenly distributed on the barrel wall of sleeve along the circumference;Drive assembly is used to drive sleeve rotation, received tablet is filled into container membrane bubble cover;Vacuum shaft is erected on the two ends of two side plates respectively connected with first slider and second slider;First slider is equipped with disc spring, one end of sleeve is abutted on disc spring by end face bearing, and second slider is equipped with adjusting rod, adjusting rod is inserted into the one end of second slider and abutted on the other end of sleeve.The elastic pre-tightening force of the disc spring of first slider, in cooperation with the adjusting rod of second slider, can fine tune axial error, ensure that groove and bubble cover are aligned, improve product pass rate and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical equipment technology, and in particular to a tablet filling device. Background Technology

[0002] In the pharmaceutical manufacturing process, tablet filling is a key step to ensure product quality and production efficiency. Its core requirement is to accurately and stably fill the orderly arranged tablets into the continuously conveyed container blister pack.

[0003] In the prior art, tablet filling devices typically employ a combination structure of vibratory feeder sorting and vacuum shaft rotation filling. The high-frequency vibration of the vibratory feeder enables automatic sorting and orientation of the tablets. Then, the rotation of the vacuum shaft is used to hold the tablets through grooves on its outer surface. The tablets are stably positioned in the grooves by vacuum adsorption and transported to the corresponding filling station of the blister pack as the vacuum shaft rotates. After the vacuum is released, the tablet filling is completed.

[0004] However, since the two ends of the vacuum shaft are directly fixed to the support of the frame by the slider, and dimensional tolerances are unavoidable in the processing of components such as the vacuum shaft, slider, and support, cumulative deviations will also occur during assembly. The slider can only be adjusted in the vertical direction and cannot be finely adjusted in the axial direction of the vacuum shaft. As a result, the above errors cannot be offset by installation and adjustment, which causes axial misalignment between the groove on the outer surface of the vacuum shaft and the tablet outlet of the vibratory plate and the filling station of the container blister pack. This leads to problems such as tablets not falling accurately into the groove, filling deviation, and jamming, directly reducing the product qualification rate and production efficiency.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] This invention provides a tablet filling device that can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A tablet filling device, comprising: The vibratory feeder has multiple rows of flow channels; A vacuum shaft is set at the output end of the vibratory feeder, including an air supply shaft and a sleeve rotatably sleeved on the air supply shaft. Multiple rows of grooves are evenly distributed along the circumference on the sleeve wall. A drive assembly is used to drive the sleeve to rotate, filling the received tablets from the vibratory plate into the conveyed container blister pack; The vacuum shaft is mounted on two side plates and its two ends are respectively connected to a first slider and a second slider. The ends of the first slider and the second slider that extend between the two side plates are provided with a retaining edge. The first slider is equipped with a disc spring, and one end of the sleeve abuts against the disc spring through an end face bearing. The second slider is equipped with an adjusting rod, and one end of the adjusting rod extends into the second slider and abuts against the other end of the sleeve.

[0008] Furthermore, the vibratory feeder is disposed on one side of the vacuum shaft, and a material settling platform is provided at the output end of the vibratory feeder; The material handling platform is provided with multiple feeding channels distributed along the axial direction of the vacuum shaft, and each feeding channel corresponds to a groove.

[0009] Furthermore, the feeding end and the discharging end of the material preparation platform are both horizontally arranged, while the middle position is inclined downward along the tablet conveying direction.

[0010] Furthermore, a vibrator is installed below the material handling platform.

[0011] Furthermore, the drive assembly includes a power bottom roller, a die roller, and a servo motor; The ends of the power bottom roller, the die roller, and the vacuum shaft are all equipped with meshing transmission gears to form a gear set that drives in sequence. The power bottom roller is connected to the servo motor.

[0012] Furthermore, the two ends of the sleeve are rotatably mounted in the first slider and the second slider respectively via needle roller bearings.

[0013] Furthermore, the first slider is provided with a limiting pin, which extends into the first slider and abuts against the air supply shaft.

[0014] Furthermore, the adjusting rod includes a screw, a handwheel, and a center head; The screw is arranged axially along the vacuum shaft, the tip is slidably disposed in the second slider, the handwheel is connected to one end of the screw, and the end of the screw extending into the second slider drives the tip to abut against the end of the sleeve.

[0015] Furthermore, the tip includes a sliding seat and a push rod disposed within the sliding seat; The push rod is rotatably mounted in the sliding seat via a bearing, and the end of the screw abuts against the sliding seat.

[0016] Furthermore, an air intake annular cavity and an air blowing annular cavity are formed between the air supply shaft and the sleeve, and a vent hole is provided at the bottom center of the groove; The air delivery central shaft sidewall is provided with a first air pipe communicating with the air intake ring cavity and a second air pipe communicating with the air blowing ring cavity along the radial direction.

[0017] The following technical effects can be achieved through the technical solution of this utility model: This invention allows the sleeve to move axially linearly via the adjusting rod of the second slider. Combined with the elastic preload of the disc spring of the first slider, it can fine-tune the axial dimension error, ensuring precise alignment between the groove and the blister pack. This completely solves the problems of tablets not falling accurately into the groove, filling misalignment, and jamming, improving the product qualification rate. At the same time, it avoids equipment downtime for cleaning due to misalignment, significantly improving production efficiency.

[0018] In this invention, the disc spring of the first slider not only provides preload for axial adjustment, but also fills the gap through its own elastic elongation when the sleeve or adjusting rod has a small gap due to wear, thus maintaining the axial positioning accuracy of the sleeve and preventing axial movement of the sleeve caused by the gap. At the same time, the buffering characteristics of the disc spring can absorb the axial vibration during equipment operation, preventing the adjusting rod from loosening or the sleeve from shifting position due to vibration, further ensuring the stability and accuracy of the equipment during long-term operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a tablet filling device. Figure 2 This is an axial cross-sectional view of a tablet filling device; Figure 3 This is a schematic diagram of the vacuum shaft structure; Figure 4 for Figure 2 A magnified view of a section at point A in the middle; Figure 5 for Figure 2 A magnified view of a section at point B in the middle; Figure 6 This is a radial cross-sectional view of the vacuum shaft.

[0021] Reference numerals: 1. Vibratory feeder; 1a. Diverter groove; 2. Vacuum shaft; 21. Air supply shaft; 22. Sleeve; 221. Groove; 222. Vent hole; 2a. Air blowing ring cavity; 2b. Air suction ring cavity; 3. Drive assembly; 31. Power bottom roller; 32. Die roller; 33. Servo motor; 4. First slider; 5. Second slider; 6. Disc spring; 7. End face bearing; 8. Adjusting rod; 81. Screw; 82. Handwheel; 83. Center head; 9. Material settling table; 10. Needle roller bearing; 11. Limit pin. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figures 1-6 As shown, this application provides a tablet filling device, including: a vibratory plate 1, a vacuum shaft 2, and a drive assembly 3. The vibratory plate 1 has multiple rows of diversion grooves 1a; the vacuum shaft 2 is disposed at the output end of the vibratory plate 1, including a gas delivery shaft 21 and a sleeve 22 rotatably sleeved on the gas delivery shaft 21. Multiple rows of grooves 221 are evenly distributed circumferentially on the sleeve wall; the drive assembly 3 is used to drive the sleeve 22 to rotate, filling the tablets received on the vibratory plate 1 into the conveying container blister pack. The vacuum shaft 2 is mounted on two side plates, and the two ends are respectively connected to the first slider 4 and the second slider 5. The ends of the first slider 4 and the second slider 5 that extend into the space between the two side plates are provided with retaining edges. The first slider 4 is provided with a disc spring 6. One end of the sleeve 22 abuts against the disc spring 6 through the end face bearing 7. The second slider 5 is provided with an adjusting rod 8. One end of the adjusting rod 8 that extends into the second slider 5 abuts against the other end of the sleeve 22.

[0025] The adjusting rod 8 of the second slider 5 linearly pushes the sleeve 22 to move axially. Combined with the elastic preload of the disc spring 6 of the first slider 4, this allows for fine-tuning of axial dimensional errors, ensuring precise alignment of the groove 221 with the blister pack. This completely solves problems such as tablets failing to accurately fall into the groove 221, filling misalignment, and jamming, improving product qualification rates and avoiding equipment downtime for cleaning due to misalignment, significantly increasing production efficiency. Furthermore, the disc spring 6 of the first slider 4 not only provides preload for axial adjustment but also fills gaps through its own elastic elongation, continuously maintaining the axial positioning accuracy of the sleeve 22 and preventing axial movement of the sleeve 22 due to gaps. Simultaneously, the buffering characteristics of the disc spring 6 absorb axial vibrations during equipment operation, preventing the adjusting rod 8 from loosening or the sleeve 22 from shifting position due to vibration, further ensuring the long-term stability and accuracy of the equipment.

[0026] In this invention, a vibratory feeder 1 is positioned on one side of a vacuum shaft 2, and a feeding platform 9 is located at the output end of the vibratory feeder 1. The feeding platform 9 has multiple feeding channels distributed along the axial direction of the vacuum shaft 2, with each feeding channel corresponding to a groove 221. The vibratory platform is horizontally installed, with the width of the output end matching the axial length of the vacuum shaft 2. A parallel feeding channel is provided on the platform, corresponding to six grooves 221 in a single row. Each feeding channel is a strip-shaped groove with a width slightly larger than the diameter of the tablet. The inlet and outlet ends of the feeding platform 9 are both horizontally positioned, while the middle section is inclined downwards along the tablet conveying direction. The downward force generated by the inclination angle provides additional propulsion to the tablet, ensuring that the tablet quickly passes through the transition area.

[0027] As a preferred embodiment of the above scheme, a vibrator is installed below the feeding platform 9 to make the tablets move continuously and at a uniform speed in the feeding path. This, combined with the seamless docking with the groove 221, avoids the accumulation or stagnation of tablets before receiving the material, ensuring that each row of grooves 221 can stably receive the material, and further improving the filling efficiency.

[0028] In a preferred embodiment of this invention, the drive assembly 3 includes a power bottom roller 31, a die roller 32, and a servo motor 33. The ends of the power bottom roller 31, the die roller 32, and the vacuum shaft 2 are all equipped with meshing transmission gears, forming a gear set for sequential transmission. The power bottom roller 31 is connected to the servo motor 33. The power bottom roller 31, the die roller 32, and the vacuum shaft 2 rotate synchronously through the gear set, and a clearance space is formed between the circumference of the die roller 32 and the outer cylindrical surface of the vacuum shaft 2 for the container membrane to pass through, thus achieving synchronous transmission between the vacuum shaft 2 and the container membrane.

[0029] In this invention, the two ends of the sleeve 22 are rotatably mounted in the first slider 4 and the second slider 5 via needle roller bearings 10, respectively. The needle roller bearings 10 have high radial rigidity, which can strictly constrain the radial displacement of the sleeve 22, avoid the problem of radial displacement of the tablets in the groove 221 due to radial movement, ensure that the tablets can fall stably into the groove 221 and be accurately transferred to the blister pack, further reduce the filling offset rate, and ensure the consistency of filling accuracy.

[0030] In this invention, a limiting pin 11 is provided on the first slider 4. The limiting pin 11 extends into the first slider 4 and abuts against the air supply shaft 21. By fixing the air supply shaft 21, the limiting pin 11 prevents the air supply shaft 21 from rotating with the sleeve 22, thus preventing the sensor wires of the vacuum pressure gauge and pressure sensor connected to the end from becoming tangled due to movement, thereby reducing the occurrence of malfunctions.

[0031] In a preferred embodiment, the adjusting rod 8 includes a screw 81, a handwheel 82, and a tip 83; the screw 81 is arranged along the axial direction of the vacuum shaft 2, the tip 83 is slidably disposed in the second slider 5, the handwheel 82 is connected to one end of the screw 81, and the end of the screw 81 extending into the second slider 5 drives the tip 83 to abut against the end of the sleeve 22.

[0032] If the sleeve 22 needs to move towards the first slider 4, rotate the handwheel 82 clockwise. The screw 81 engages with the thread of the second slider 5 and moves towards the sleeve 22. The front end of the screw 81 pushes the tip 83 to slide along the guide groove of the second slider 5 (to prevent the tip 83 from rotating). The spherical end of the tip 83 abuts against the end of the sleeve 22, pushing the sleeve 22 to compress the disc spring 6 inside the first slider 4. The sleeve 22 moves axially along the air supply shaft 21. If the sleeve 22 needs to move towards the second slider 5, rotate the handwheel 82 counterclockwise. The screw 81 retracts away from the sleeve 22. The disc spring 6 inside the first slider 4 releases its preload, pushing the sleeve 22 towards the second slider 5 until the end of the sleeve 22 abuts against the tip 83 again.

[0033] Preferably, the center head 83 includes a sliding seat and a push rod disposed within the sliding seat; the push rod is rotatably disposed within the sliding seat via a bearing, and the end of the screw 81 abuts against the sliding seat. This center head 83 structure, combining a sliding seat and a push rod, allows the push rod to rotate synchronously with the sleeve 22 via the bearing, while the sliding seat only moves axially. This eliminates relative sliding friction between the push rod and the sleeve 22, significantly reducing wear on both and extending the lifespan of both the sleeve 22 and the push rod.

[0034] In this utility model, an air intake annular cavity 2b and an air blowing annular cavity 2a are formed between the air supply shaft 21 and the sleeve 22, and a vent hole 222 is provided at the bottom center of the groove 221. The air supply shaft 21 has a first air pipe that communicates with the intake ring cavity 2b and a second air pipe that communicates with the blowing ring cavity 2a on its side wall along the radial direction.

[0035] The vacuum shaft 2 has a suction ring cavity 2b connected to a first fan providing negative pressure; the blowing ring cavity 2a is connected to a second fan providing positive pressure. The servo motor 33 drives the vacuum shaft 2 to rotate clockwise. When a row of grooves 221 rotates to the receiving area, the vent holes 222 of the grooves 221 connect to the suction ring cavity 2b through the internal air passage. The negative pressure generated by the first fan acts on the grooves 221 through the suction ring cavity 2b and the vent holes 222. At this time, a single tablet conveyed by the vibratory feeder 1 reaches the groove 221 in the receiving area. Under the negative pressure adsorption, the tablet is accurately sucked into the groove 221 and positioned. The vacuum shaft 2 continues to rotate, and the groove 221 carrying the tablet enters the feeding area. The vent holes 222 remain connected to the suction ring cavity 2b, and the negative pressure continues to act, ensuring that the tablet does not fall off due to centrifugal force or vibration during the rotation and conveying process with the vacuum shaft 2, and moves stably towards the feeding area. When the groove 221 rotates to the feeding area, the vent 222 switches to connect with the blowing ring cavity 2a. The positive pressure generated by the second blower blows air into the groove 221 through the blowing ring cavity 2a and the vent 222. The downward thrust generated by the positive pressure, combined with the weight of the tablet itself, forces the tablet out of the groove 221. At this time, the container blister below the feeding area moves to the corresponding position, and the tablet falls accurately into the blister. After the feeding is completed, the groove 221 continues to rotate and enters the waiting area. The vent 222 is disconnected from the suction ring cavity 2b and the blowing ring cavity 2a. The groove 221 is in an empty state. As the vacuum shaft 2 continues to rotate, the groove 221 re-enters the receiving area and begins the next round of receiving, feeding, and feeding cycle, realizing continuous tablet filling.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tablet filling device, characterized in that, include: The vibratory feeder has multiple rows of flow channels; A vacuum shaft is set at the output end of the vibratory feeder, including an air supply shaft and a sleeve rotatably sleeved on the air supply shaft. Multiple rows of grooves are evenly distributed along the circumference on the sleeve wall. A drive assembly is used to drive the sleeve to rotate, filling the received tablets from the vibratory plate into the conveyed container blister pack; The vacuum shaft is mounted on two side plates and its two ends are respectively connected to a first slider and a second slider. The ends of the first slider and the second slider that extend between the two side plates are provided with a retaining edge. The first slider is equipped with a disc spring, and one end of the sleeve abuts against the disc spring through an end face bearing. The second slider is equipped with an adjusting rod, and one end of the adjusting rod extends into the second slider and abuts against the other end of the sleeve.

2. The tablet filling device according to claim 1, characterized in that, The vibratory feeder is located on one side of the vacuum shaft, and a material settling platform is provided at the output end of the vibratory feeder; The material handling platform is provided with multiple feeding channels distributed along the axial direction of the vacuum shaft, and each feeding channel corresponds to a groove.

3. The tablet filling device according to claim 2, characterized in that, The feeding end and the discharging end of the material handling platform are both horizontally set, while the middle position is inclined downward along the tablet conveying direction.

4. The tablet filling device according to claim 3, characterized in that, A vibrator is installed below the material handling platform.

5. The tablet filling device according to claim 1, characterized in that, The drive assembly includes a power bottom roller, a die roller, and a servo motor; The ends of the power bottom roller, the die roller, and the vacuum shaft are all equipped with meshing transmission gears to form a gear set that drives in sequence. The power bottom roller is connected to the servo motor.

6. The tablet filling device according to claim 1, characterized in that, The two ends of the sleeve are respectively rotatably mounted in the first slider and the second slider via needle roller bearings.

7. The tablet filling device according to claim 1, characterized in that, The first slider is provided with a limiting pin, which extends into the first slider and abuts against the air supply shaft.

8. The tablet filling device according to claim 1, characterized in that, The adjusting rod includes a screw, a handwheel, and a center head; The screw is arranged axially along the vacuum shaft, the tip is slidably disposed in the second slider, the handwheel is connected to one end of the screw, and the end of the screw extending into the second slider drives the tip to abut against the end of the sleeve.

9. The tablet filling device according to claim 8, characterized in that, The tip includes a sliding seat and a push rod disposed within the sliding seat; The push rod is rotatably mounted in the sliding seat via a bearing, and the end of the screw abuts against the sliding seat.

10. The tablet filling device according to claim 1, characterized in that, An air intake annular cavity and an air blowing annular cavity are formed between the air supply shaft and the sleeve, and a vent hole is provided at the bottom center of the groove; The air delivery central shaft sidewall is provided with a first air pipe communicating with the air intake ring cavity and a second air pipe communicating with the air blowing ring cavity along the radial direction.

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