Transmission structure of intermittent full-weighing penicillin bottle filling machine

Abstract

The invention provides a transmission structure of an intermittent full-weighing penicillin bottle filling machine, which belongs to the technical field of penicillin bottle filling and comprises a bottle walking bottom rail, a bottle feeding mechanism, two fan-shaped discs, a first weighing mechanism, a filling mechanism and a second weighing mechanism. The bottle conveying bottom plate horizontally extends in the conveying direction to stably support penicillin bottles, and the fan-shaped disc mechanisms at the two ends of the bottle conveying bottom plate conduct grabbing transition through the second semicircular grooves and are responsible for feeding and discharging of the bottle bodies. The bottle conveying plate is arranged above the bottle walking bottom plate, limits bottle bodies through the first semicircular grooves and is driven by the connecting rod assembly and the bottle conveying driving assembly to do reciprocating intermittent movement. The first weighing mechanism, the filling mechanism and the second weighing mechanism are sequentially arranged between the two fan-shaped discs and complete empty bottle weighing, liquid medicine filling and full bottle checking respectively. According to the intermittent full-weighing penicillin bottle filling machine transmission structure, the structure is accurate in positioning and stable in conveying, the problems that traditional transmission is stuck and bottle bodies deviate are solved, true weighing and uniform filling are guaranteed, and ordered circulation of the bottle bodies is achieved.

Description

Technical Field

[0001] This invention belongs to the field of vial filling technology, and more specifically, relates to a transmission structure for an intermittent full-weight vial filling machine. Background Technology

[0002] As a key piece of equipment in the pharmaceutical industry for the production of sterile preparations such as injections and lyophilized preparations, vial filling machines have a significant impact on filling accuracy, operational stability, and production efficiency due to their transmission and conveying structures.

[0003] To achieve precise and controllable drug filling volume and traceability of the production process, intermittent full weighing filling has become the mainstream method in the industry. It is usually necessary to weigh the empty vials before filling and weigh the finished vials again after filling. The difference is used to calculate the filling volume compensation and quality monitoring.

[0004] Existing intermittent vial filling machines mostly adopt traditional mechanical transmission structures combining conveyor belts, star wheels, or shift forks. These machines generally suffer from problems such as low conveying positioning accuracy and easy slippage and displacement of the bottles during intermittent conveying. This leads to inaccurate alignment of weighing and filling stations, which in turn affects the reliability of weighing data and the consistency of filling. Consequently, they are difficult to adapt to the high stability, high precision, and high compliance production requirements of high-end aseptic preparations. Summary of the Invention

[0005] The purpose of this invention is to provide a transmission structure for an intermittent full-weighing vial filling machine, which aims to solve the problems of low conveying and positioning accuracy and easy slippage and displacement of the bottle body during intermittent conveying in traditional mechanical transmission structures, resulting in inaccurate alignment of weighing and filling stations, and thus affecting the reliability of weighing data and the consistency of filling.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a transmission structure for an intermittent full-weighing vial filling machine, including a bottle bottom rail mechanism, a bottle feeding mechanism, two sector disc mechanisms, a first weighing mechanism, a filling mechanism, and a second weighing mechanism; The bottle-carrying bottom rail mechanism includes a bottle-carrying bottom plate extending horizontally along the bottle conveying direction for supporting the bottles; the two ends of the bottle-carrying bottom plate are the feeding end and the discharging end, respectively, and the two fan-shaped disk mechanisms are respectively arranged at the feeding end and the discharging end; The bottle feeding mechanism includes a bottle feeding plate, a connecting rod assembly, and a bottle feeding drive assembly. The bottle feeding plate is horizontally positioned above the bottle conveying base plate along the vial conveying direction, and a plurality of first semi-circular grooves are spaced apart on one side of the bottle feeding plate along its length direction. The connecting rod assembly is connected to the lower part of the bottle feeding plate, and the bottle feeding drive assembly drives the connecting rod assembly to cause the bottle feeding plate to reciprocate intermittently along the vial conveying direction. The sector disk mechanism includes a sector disk and a first drive component; the outer circumference of the sector disk is provided with a plurality of second semicircular grooves spaced apart, and the drive end of the first drive component is connected upward to the center of the sector disk for driving the sector disk to rotate. The first weighing mechanism, the filling mechanism, and the second weighing mechanism are arranged sequentially along the vial conveying direction and are all located between the two sector-shaped disk mechanisms. They are used to weigh vials that have not been filled with medicine, fill vials with medicine, and weigh vials that have been filled with medicine, respectively.

[0007] In one possible implementation, the lower end of the bottle-carrying base plate is provided with a plurality of bottle-carrying support columns spaced apart along the length direction; the lower end of each bottle-carrying support column is fixed, and the upper end is fixedly connected to the lower end face of the bottle-carrying base plate; the upper end face of the bottle-carrying base plate is provided with an antistatic layer for contacting the bottom of the vial.

[0008] In one possible implementation, each of the sector disk mechanisms includes multiple sector disks; the multiple sector disks are arranged coaxially and circumferentially, and a buffer gap is provided between two adjacent sector disks; The first driving component is multiple and is connected to each of the multiple sector disks in a one-to-one correspondence. It is used to drive the multiple sector disks to rotate respectively, and to enable the sector disks behind it along the rotation direction to rotate intermittently through the buffer gap.

[0009] In one possible implementation, the outer circumference of the sector disk has a groove, and the upper and lower sides of the groove are respectively provided with a plurality of second semi-circular grooves; the lower end face of the sector disk is provided with an outwardly extending support plate. A mounting frame is provided below the fan-shaped disk, and a fall protection plate is provided around the edge of the mounting frame. The fall protection plate is located outside the fan-shaped disk and forms a conveying gap with the outer circle of the fan-shaped disk. The fall protection plate is set on the feeding side of the feeding end or the discharging side of the discharging end along the rotation direction of the fan-shaped disk.

[0010] In one possible implementation, the linkage assembly includes four active swing arms, which are arranged in pairs at both ends of the bottle feeding plate. The bottle feeding drive assembly includes four active drive components, which are connected one-to-one with four active swing arms; the other ends of two active swing arms at the same end are coaxially rotatably connected to the lower end of the bottle feeding plate. Each of the active swing arms has a hinge shaft in the middle, which divides the active swing arm into two hinge segments, so that the two active swing arms at the same end form a four-bar linkage structure.

[0011] In one possible implementation, the linkage assembly further includes two auxiliary swing arms; one end of the two auxiliary swing arms is connected to two active swing arms at either end via two linkage groups, and the other end of the two auxiliary swing arms is coaxially rotatably connected to the middle of the lower end of the bottle feeding plate. Each of the auxiliary swing arms has a hinge shaft in the middle, which divides the auxiliary swing arm into two hinge segments, so that the two auxiliary swing arms form a four-bar linkage structure.

[0012] In one possible implementation, the first weighing mechanism and the second weighing mechanism have the same structure, both including a weighing sensor, a weighing head, and a weighing support; the weighing support is fixed longitudinally, the weighing sensor is fixed to the top of the weighing support, and the weighing head is connected to the upper side of the weighing sensor.

[0013] In one possible implementation, the filling mechanism includes a filling drive motor, a needle holder lifting rod, and a needle holder plate; the needle holder lifting rod is arranged longitudinally, and the needle holder plate is laterally fixed to the top of the needle holder lifting rod; a plurality of filling needles are arranged laterally at intervals on the needle holder plate, with the needle tips facing downwards; The filling drive motor is arranged horizontally and drives the needle holder lifting rod to rise and fall through a worm gear structure, thereby causing the needles of multiple filling needles to insert into or detach from the vial.

[0014] In one possible implementation, two bottle protection mechanisms are also included; the two bottle protection mechanisms are arranged sequentially along the vial conveying direction and correspond to the first weighing mechanism and the second weighing mechanism respectively; the bottle protection mechanism has a degree of freedom to reciprocate perpendicular to the vial conveying direction; The bottle protection mechanism corresponding to the first weighing mechanism is used to push multiple vials from the bottle-carrying bottom plate to the first weighing mechanism for weighing, or to pull the weighed vials back to the bottle-carrying bottom plate. The bottle protection mechanism corresponding to the second weighing mechanism is used to push multiple filled vials from the bottle-carrying bottom plate to the second weighing mechanism for weighing, or to pull the weighed vials back to the bottle-carrying bottom plate.

[0015] In one possible implementation, the bottle protection mechanism includes: A fastener is fixed below the bottom plate of the bottle conveyor; The sliding frame is slidably engaged with the fixing component. The sliding frame has an upwardly extending first support and a second support on both sides. The first support and the second support are located on the left and right sides of the bottle conveying bottom plate, respectively. The upper end of the first support is provided with a bottle protection template extending along the bottle conveying direction, and the upper end of the second support is provided with a moving rod extending along the bottle conveying direction. A reciprocating lateral movement assembly is used to fix the bottle conveyor plate on the side away from the first weighing mechanism or the second weighing mechanism. The reciprocating lateral movement assembly is connected to the sliding frame and is used to drive the sliding frame to reciprocate in a direction perpendicular to the bottle conveying direction, so as to push the bottle to the first weighing mechanism or the second weighing mechanism with the help of the bottle protection template, or to pull the bottle back to the bottle conveyor plate with the help of the moving rod.

[0016] The beneficial effects of the transmission structure of the intermittent full-weighing vial filling machine provided by the present invention are as follows: Compared with the prior art, the bottle-carrying base plate extending horizontally along the vial conveying direction provides a stable and flat support surface for the bottle body throughout the entire process, reducing shaking, slippage and offset during the bottle conveying process, and laying the foundation for subsequent positioning, weighing and filling work.

[0017] The bottle feeding mechanism's feeding plate is horizontally positioned above the bottle conveying base plate along the conveying direction. Multiple semi-circular grooves spaced along one side of its length form a circumferential semi-enclosed rigid limit for the vial body, creating a relatively fixed conveying unit between the vial body and the feeding plate. This avoids the bottle rotation and misalignment problems caused by traditional friction pushing and unrestrained pushing. Combined with the transmission action of the linkage assembly and the bottle feeding drive assembly, it achieves smooth reciprocating intermittent movement of the feeding plate. The transmission rigidity is strong, and the motion impact is small, effectively avoiding the jamming and inertial offset of traditional intermittent transmission methods such as gears and chains. This ensures that the bottle body's posture is stable at the moment of start and stop, further improving the positioning accuracy of intermittent conveying and ensuring that the bottle body is always accurately aligned with each station.

[0018] The fan-shaped disk mechanism, which is set at the feeding end and the discharging end respectively, uses the second semi-circular grooves opened at intervals on its outer circumference to grasp and transition the vials, so as to realize the smooth and orderly entry and exit of the vials into and out of the conveying station. This avoids the misalignment and jamming of the vials caused by manual or rough feeding and discharging. At the same time, the first drive component drives the fan-shaped disk directly from the center of the disk, so that the rotation index of the fan-shaped disk is stable, and the vials are continuously and stably transferred between the stations.

[0019] Furthermore, the first weighing mechanism, the filling mechanism, and the second weighing mechanism are sequentially arranged in the stable conveying section between the double-fan-shaped disc mechanism along the conveying direction. Based on the precise positioning and stable conveying of the overall transmission structure, the positioning is accurate when weighing empty bottles, ensuring that the weighing data is true and reliable. The filling station is accurately aligned, effectively ensuring the consistency between the filling volume and the filling position. The second weighing of full bottles can verify the filling effect in real time, forming a closed-loop control. Structurally, this completely solves the problems of weighing distortion and uneven filling caused by inaccurate alignment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the transmission structure of an intermittent full-weight vial filling machine provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the bottle-carrying bottom rail mechanism provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the bottle feeding mechanism provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the sector-shaped disk mechanism provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the first weighing mechanism / second weighing mechanism provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the filling mechanism provided in an embodiment of the present invention; Figure 7 A perspective view of the bottle protection mechanism provided in an embodiment of the present invention; Figure 8 A top view of the bottle protection mechanism provided in an embodiment of the present invention; Figure 9 for Figure 8 Sectional view along the middle AA.

[0022] In the picture: 100. Bottle-carrying bottom rail mechanism; 101. Bottle-carrying bottom plate; 102. Bottle-carrying support column; 103. Antistatic layer; 200. Bottle feeding mechanism; 201. Bottle feeding plate; 202. First semi-circular groove; 203. Active swing arm; 204. Active drive component; 205. Auxiliary swing arm; 206. Linkage assembly; 300. Sector-shaped disk mechanism; 301. Sector-shaped disk; 3011. Groove; 3012. Support plate; 302. Second semi-circular groove; 303. Mounting bracket; 304. First drive assembly; 305. Drive gear; 306. Transmission gear; 400. First weighing mechanism; 401. Weighing sensor; 402. Weighing head; 403. Weighing support column; 500. Filling mechanism; 501. Filling drive motor; 502. Needle holder lifting rod; 503. Needle holder plate; 600. Second weighing mechanism; 700. Bottle protection mechanism; 701. Fixing block; 702. Slide rod; 703. Connecting plate; 704. Support plate; 705. Mounting plate; 706. Bottle protection template; 707. Protrusion; 708. Third semicircular groove; 709. Arc groove; 710. Support rod; 711. Insertion section; 712. Moving rod; 713. Box body; 714. Horizontal moving rod; 715. Limiting plate; 716. Eccentric wheel; 717. Rotary motor; 718. Coupling; 719. Central rotating shaft. Detailed Implementation

[0023] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.

[0025] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of the invention.

[0026] Please see Figures 1 to 7The present invention will now describe a transmission structure for an intermittent full-weighing vial filling machine. The transmission structure for an intermittent full-weighing vial filling machine includes a bottle-carrying bottom rail mechanism 100, a bottle-feeding mechanism 200, two sector-shaped disc mechanisms 300, a first weighing mechanism 400, a filling mechanism 500, and a second weighing mechanism 600. The bottle-carrying bottom rail mechanism 100 includes a bottle-carrying bottom plate 101 extending horizontally along the vial conveying direction to support the vials; the two ends of the bottle-carrying bottom plate 101 are the inlet end and the outlet end, respectively, and two sector-shaped disc mechanisms 300 are respectively disposed at the inlet end and the outlet end; the bottle-feeding mechanism 200 includes a bottle-feeding plate 201, a connecting rod assembly, and a bottle-feeding drive assembly; the bottle-feeding plate 201 is horizontally disposed above the bottle-carrying bottom plate 101 along the vial conveying direction, and a plurality of first semi-circular grooves 202 are spaced apart on one side along the length direction of the bottle-feeding plate 201; the connecting rod assembly is connected to the lower part of the bottle-feeding plate 201, and the bottle-feeding drive assembly drives the bottle-feeding plate 201 through the driving connecting rod assembly. The system reciprocates intermittently along the vial conveying direction; the sector disk mechanism 300 includes a sector disk 301 and a first drive assembly 304; the outer circumference of the sector disk 301 is provided with a plurality of second semi-circular grooves 302 spaced apart, and the drive end of the first drive assembly 304 is connected upward to the center of the sector disk 301 to drive the sector disk 301 to rotate; the first weighing mechanism 400, the filling mechanism 500 and the second weighing mechanism 600 are arranged sequentially along the vial conveying direction and are all located between the two sector disk mechanisms 300, respectively used to weigh vials without liquid filling, fill vials with liquid filling, and weigh vials after liquid filling.

[0027] The present invention provides a transmission structure for an intermittent full-weighing vial filling machine. Compared with the prior art, the horizontally extending bottle-carrying base plate 101 along the vial conveying direction provides a stable and flat support surface for the vial body, reducing shaking, slippage and offset during the vial conveying process, and laying the foundation for subsequent positioning, weighing and filling work.

[0028] The bottle feeding mechanism 200 has a bottle feeding plate 201 horizontally positioned above the bottle conveying base plate 101 along the conveying direction. Multiple first semi-circular grooves 202 spaced apart on one side of the bottle feeding plate 200 can form a circumferential semi-enclosed rigid limit for the vial body, making the vial body and the bottle feeding plate 201 form a relatively fixed conveying unit. This avoids the problems of bottle rotation and misalignment caused by traditional friction pushing and unrestrained pushing. Combined with the transmission action of the linkage assembly and the bottle feeding drive assembly, the bottle feeding plate 201 can move smoothly back and forth intermittently. The transmission rigidity is strong and the movement impact is small, which effectively avoids the jamming and inertial offset of traditional intermittent transmission methods such as gears and chains. This ensures that the bottle body is stable in posture at the moment of start and stop, further improving the positioning accuracy of intermittent conveying and ensuring that the vial body is always accurately aligned with each station.

[0029] The fan-shaped disk mechanism 300, which is set at the feeding end and the discharging end respectively, grips and transitions the vials through the second semi-circular groove 302 opened at intervals on its outer circumference. This enables the vials to enter and leave the conveying station smoothly and orderly, avoiding misalignment and jamming of the vials caused by manual or rough feeding and discharging. At the same time, the first drive component 304 drives the fan-shaped disk 301 directly from the center, making the rotation indexing of the fan-shaped disk 301 stable, and realizing the continuous and stable flow of the vials between each station.

[0030] In addition, the first weighing mechanism 400, the filling mechanism 500 and the second weighing mechanism 600 are arranged sequentially in the stable conveying section between the double sector disc mechanism 300 along the conveying direction. Based on the precise positioning and stable conveying of the overall transmission structure, the positioning is accurate when weighing empty bottles, ensuring that the weighing data is true and reliable. The filling station is accurately aligned, effectively ensuring the consistency between the filling volume and the filling position. The second weighing of full bottles can verify the filling effect in real time, forming a closed-loop control. The structure completely solves the problems of weighing distortion and uneven filling caused by inaccurate alignment.

[0031] Please see Figure 2 The bottle conveying bottom plate 101 is made of stainless steel to ensure structural strength and corrosion resistance. Its length is set according to the overall specifications of the filling machine to ensure that it can cover the complete conveying path from the feed end fan-shaped disc mechanism 300 to the discharge end fan-shaped disc mechanism 300.

[0032] The two ends of the bottle-carrying bottom plate 101 are the feeding end and the discharging end, respectively. The feeding end is connected to the output end of the feeding side sector plate mechanism 300, and the discharging end is connected to the input end of the discharging side sector plate mechanism 300, ensuring that the vial can smoothly enter and leave the bottle-carrying bottom plate 101.

[0033] To ensure stable support for the bottle conveying base plate 101, multiple bottle conveying support columns 102 are spaced apart along the length of the lower end of the bottle conveying base plate 101. The bottle conveying support columns 102 adopt a cylindrical structure, with their lower ends fixed to the frame of the filling machine by expansion bolts, and their upper ends fixedly connected to the lower end face of the bottle conveying base plate 101 by welding. The spacing between two adjacent bottle conveying support columns 102 is set to 30-50cm to ensure that the bottle conveying base plate 101 is subjected to uniform force, avoid deformation of the bottle conveying base plate 101 due to concentrated placement of vials, and ensure the stability of the conveying process. Meanwhile, an antistatic layer 103 is provided on the upper surface of the bottle conveying base plate 101. The antistatic layer 103 is made of polyvinyl chloride antistatic coating and is attached to the surface of the bottle conveying base plate 101 by spraying process. The thickness is 0.3-0.5mm. Its function is to eliminate the static electricity generated between the vial and the bottle conveying base plate 101 due to friction, prevent static electricity from attracting dust and contaminating the vial, and avoid static electricity from causing the vials to attract and shift to each other, thus ensuring the neatness of the vial transport.

[0034] Please see Figure 4 Two sector-shaped disc mechanisms 300 are respectively set at the inlet and outlet ends of the bottle-carrying bottom plate 101. They have the same structure and are used to realize the smooth transition of the vials between the external conveyor line and the bottle-carrying bottom rail mechanism 100, so as to avoid collisions and tipping of the vials during the transfer process.

[0035] Each sector disk mechanism 300 includes multiple sector disks 301 and multiple first drive components 304. The multiple sector disks 301 are arranged coaxially and circumferentially. A buffer gap is provided between two adjacent sector disks 301. The buffer gap is used to avoid frictional interference when adjacent sector disks 301 rotate, and at the same time provides adjustment space for the intermittent rotation of subsequent sector disks 301.

[0036] The sector-shaped disk 301 is made of engineering plastic material. Multiple second semi-circular grooves 302 are spaced apart on its outer circumference. The size of the second semi-circular grooves 302 matches the diameter of the vial body to ensure that the vial can be stably locked in the second semi-circular grooves 302. The number of second semi-circular grooves 302 on each sector-shaped disk 301 is set according to the production efficiency of the filling machine, usually 6-12, and evenly distributed on the outer circumference of the sector-shaped disk 301. In addition, the outer circle of the sector-shaped disk 301 is provided with a groove 3011 along the circumference. The upper and lower sides of the groove 3011 are respectively provided with multiple second semi-circular grooves 302. This double-layer groove design can be adapted to vials of different heights, improving the versatility of the mechanism. The lower end face of the sector-shaped disk 301 is provided with an outwardly extending support plate 3012. The support plate 3012 is integrally formed with the sector-shaped disk 301 and is used to support the bottom of the vial, further improving the stability of the vial on the sector-shaped disk 301 and preventing the vial from falling during rotation.

[0037] The first drive assembly 304 employs a servo motor, the number of which corresponds one-to-one with the number of sector disks 301. The center of each sector disk 301 has multiple coaxially mounted transmission sleeves, each with a transmission gear 306 mounted at its lower end. These transmission gears 306 are spaced apart from top to bottom. The drive end of each first drive assembly 304 is connected upwards to a drive gear 305 via a coupling 718. The drive gears 305 mesh one-to-one with the transmission gears 306, ensuring that the first drive assembly 304 can precisely drive the corresponding sector disk 301 to rotate. Multiple first drive assemblies 304 are synchronously controlled. Through the buffer gap between adjacent sector disks 301, the sector disks 301 behind in the rotation direction rotate intermittently. That is, after the front sector disk 301 rotates a certain angle and transports the vial to a designated position, the rear sector disk 301 rotates a corresponding angle, achieving intermittent transfer of the vial and avoiding squeezing and collision of vials caused by the synchronous rotation of multiple sector disks 301.

[0038] A mounting bracket 303 is provided below the sector-shaped disc 301. The mounting bracket 303 is fixed to the filling machine frame with bolts. The edge of the mounting bracket 303 is provided with a fall prevention plate. The fall prevention plate is made of stainless steel and extends vertically upward. It is located on the outer side of the sector-shaped disc 301 and forms a 5-8mm conveying gap with the outer circle of the sector-shaped disc 301. This conveying gap does not affect the rotation of the sector-shaped disc 301 and prevents the vials from falling off the edge of the sector-shaped disc 301. The fall prevention plate of the sector-shaped disc mechanism 300 at the feeding end is correspondingly set on the feeding side of the feeding end to prevent the vials conveyed by the external conveyor line from deviating from the sector-shaped disc 301. The fall prevention plate of the sector-shaped disc mechanism 300 at the discharging end is correspondingly set on the discharging side of the discharging end to prevent the vials on the sector-shaped disc 301 from deviating from the conveying path during discharging, ensuring that the vials can smoothly enter the external bottle receiving line.

[0039] Please see Figure 3 The bottle feeding mechanism 200 is used to drive the vials on the bottle conveying base plate 101 to move back and forth intermittently along the conveying direction, so as to realize the transfer of vials between various stations (first weighing mechanism 400, filling mechanism 500, and second weighing mechanism 600).

[0040] Specifically, the bottle feeding mechanism 200 includes a bottle feeding plate 201, a connecting rod assembly, and a bottle feeding drive assembly. The bottle feeding plate 201 is horizontally positioned above the bottle conveying base plate 101 along the vial conveying direction. The length of the bottle feeding plate 201 matches the effective conveying length of the bottle conveying base plate 101. Multiple first semi-circular grooves 202 are spaced apart on one side of its length. The size of each first semi-circular groove 202 matches the diameter of the vial body. The spacing between two adjacent first semi-circular grooves 202 is consistent with the spacing of the second semi-circular grooves 302 on the sector disc 301, ensuring that the vials can be engaged within the first semi-circular grooves 202 for synchronous conveying. The bottle feeding plate 201 is made of lightweight aluminum alloy, reducing the overall weight and lowering the drive load.

[0041] The linkage assembly includes four active swing arms 203 and two auxiliary swing arms 205. The four active swing arms 203 are arranged in pairs at both ends of the bottle feeding plate 201, that is, two active swing arms 203 are provided at the feeding end and two at the discharging end of the bottle feeding plate 201. The bottle feeding drive assembly includes four active drive components 204. The active drive components 204 are servo motors. The four active drive components 204 are connected to the four active swing arms 203 in a one-to-one correspondence. The output end of each active drive component 204 is hinged to one end of the corresponding active swing arm 203 through a gear set. The fixed end of the active drive component 204 is fixed to the filling machine frame through a bracket. The other ends of the two active swing arms 203 at the same end are coaxially rotatably connected to the lower end of the bottle feeding plate 201 via a rotating shaft. Each active swing arm 203 has a hinge shaft in the middle, which divides the active swing arm 203 into two hinge segments, so that the two active swing arms 203 at the same end form a four-bar linkage structure. This structure can ensure the stability of the active swing arm 203 during movement and prevent the bottle feeding plate 201 from shifting.

[0042] Two auxiliary swing arms 205 are positioned at the lower center of the bottle feeding plate 201. One end of each auxiliary swing arm 205 is connected to two corresponding active swing arms 203 via two linkage groups 206. Specifically, one end of the linkage group 206 is connected to the rotation shaft in the middle of the active swing arm 203 at either end, and the other end is rotatably connected to one end of the auxiliary swing arm 205. The linkage group 206 includes three links connected in sequence by hinges: link one, link two, and link three. The line connecting the rotation shaft of the auxiliary swing arm 205 and the rotation shaft of the active swing arm 203 connected to it is parallel to link two, allowing the active swing arm 203 to drive the corresponding auxiliary swing arm 205 to rotate synchronously. The other ends of the two auxiliary swing arms 205 are coaxially rotatably connected to the lower center of the bottle feeding plate 201 via a pivot. Each auxiliary swing arm 205 also has a hinge shaft in its middle, dividing the auxiliary swing arm 205 into two hinged segments, thus forming a four-bar linkage structure. The auxiliary swing arm 205 is set to assist in supporting the bottle feeding plate 201, ensuring that the bottle feeding plate 201 remains horizontal during the reciprocating intermittent movement, and preventing the bottle feeding plate 201 from tilting due to uneven force at both ends, thereby preventing the vial from tipping over.

[0043] The operation of the bottle feeding mechanism 200 is as follows: The four active drive components 204 of the bottle feeding drive assembly operate synchronously, driving the corresponding active swing arms 203 to swing around the central hinge axis, thereby driving the four-bar linkage to move. This, in turn, drives the bottle feeding plate 201 to move forward along the vial conveying direction, with the moving distance matching the distance between two adjacent workstations. When the bottle feeding plate 201 conveys the vial to the designated workstation (such as the first weighing mechanism 400), the active drive components 204 stop. After weighing is completed, the operation resumes. The bottle feeding plate 201 moves backward to avoid the obstruction and then continues to move forward to reset, driving the bottle feeding plate 201 to complete one reciprocating intermittent movement. This cycle repeats, achieving precise transfer of vials between workstations. The auxiliary swing arm 205 swings synchronously during the movement of the bottle feeding plate 201, always providing stable support for the bottle feeding plate 201 and ensuring its horizontal movement.

[0044] Please see Figure 5 Both weighing mechanisms include a weighing sensor 401, a weighing head 402, and a weighing support 403. The weighing support 403 is a cylindrical stainless steel structure, longitudinally fixed to the filling machine frame, with its lower end bolted to the frame to ensure support stability. The weighing sensor 401 is a high-precision pressure sensor, with its fixed end bolted to the top of the weighing support 403. The bottom of the weighing head 402 is threaded to the upper side of the weighing sensor 401. The weighing sensor 401 is electrically connected to the filling machine's control system, enabling real-time transmission of weighing data to the control system. The control system then determines whether the empty bottle weight meets the standard and whether the full bottle weight meets the standard (i.e., whether the filling volume is qualified).

[0045] The weighing mechanism operates as follows: When the bottle feeding mechanism 200 delivers the vial to the corresponding position of the first weighing mechanism 400, the bottle protection mechanism 700 of the first weighing mechanism 400 activates, pushing the vial from the bottle conveyor base plate 101 onto the weighing head 402. The weighing sensor 401 begins weighing and transmits the empty bottle weight data to the control system. If the empty bottle weight is unqualified (e.g., due to damage or missing material), the control system issues an alarm signal, and staff handle the situation promptly. If the empty bottle weight is qualified, the bottle protection mechanism 700 pulls the vial back to the bottle conveyor base plate 101, and the bottle feeding mechanism 200 delivers it to the filling mechanism 500 for filling. After filling is completed, the bottle feeding mechanism 200 transports the vials to the corresponding position of the second weighing mechanism 600. The bottle protection mechanism 700 of the second weighing mechanism 600 then moves to push the vials onto the weighing head 402. The weighing sensor 401 weighs the full vials and transmits the data to the control system. The control system calculates the difference between the weight of the full vial and the weight of the empty vial, which is the filling volume. If the filling volume does not meet the standard, the control system issues an alarm signal and rejects the unqualified product. If the filling volume is qualified, the bottle protection mechanism 700 pulls the vials back to the bottle conveying base plate 101, and the bottle feeding mechanism 200 transports them to the discharge end fan-shaped disk mechanism 300 to complete the subsequent bottle collection process.

[0046] Please see Figure 6 The filling mechanism 500 includes a filling drive motor 501, a needle holder lifting rod 502, and a needle holder plate 503. The needle holder lifting rod 502 is a cylindrical stainless steel structure, longitudinally mounted on the filling machine frame. A sliding bearing is installed between its lower end and the frame to ensure smooth lifting and lowering. The needle holder plate 503 is a rectangular aluminum alloy plate, horizontally fixed to the top of the needle holder lifting rod 502 and bolted to it. Multiple filling needles are arranged horizontally at intervals on the needle holder plate 503. The number of filling needles matches the number of the first semi-circular grooves 202 on the bottle feeding plate 201, ensuring simultaneous filling of multiple vials and improving production efficiency. The filling needles have downward-facing tips, their specifications matching the vial neck size. The needle tips are blunted to prevent scratching the vial neck. The filling needles are connected to an external medicine delivery pipeline, and the delivery and stopping of the medicine are controlled by a solenoid valve.

[0047] The filling drive motor 501 is a servo motor, horizontally mounted on one side of the filling machine frame. Its output end is connected to the input end of the worm gear structure via a coupling 718. The output end of the worm gear structure is fixedly connected to the lower end of the needle holder lifting rod 502, realizing the transmission connection between the filling drive motor 501 and the needle holder lifting rod 502. The worm gear structure has a self-locking function, ensuring that the needle holder lifting rod 502 remains stable after being raised to the designated position, preventing it from descending due to gravity, and ensuring the safety and accuracy of the filling process.

[0048] The operation of the filling mechanism 500 is as follows: After the bottle feeding mechanism 200 delivers the weighed and qualified vials to the corresponding position of the filling mechanism 500, the bottle feeding mechanism 200 stops, and the vials remain stably on the bottle-carrying base plate 101. At this time, the filling drive motor 501 starts, driving the needle holder lifting rod 502 downward through the worm gear structure, which in turn drives the needle holder plate 503 and the filling needle to descend synchronously, so that the needle tip of the filling needle is inserted into the mouth of the vial. After the needle tip is inserted into place, the external medicine is delivered. The solenoid valve of the pipeline opens, and the liquid medicine is injected into the vial through the filling needle. The filling volume is precisely controlled by the control system based on the empty vial weight data of the first weighing mechanism 400. After filling is completed, the solenoid valve closes, the filling drive motor 501 reverses, and drives the needle holder lifting rod 502 to move upward through the worm gear structure, causing the filling needle to disengage from the vial mouth. The filling process is completed, and the vial delivery mechanism 200 is started to transport the filled vial to the second weighing mechanism 600 for full-bottle weighing.

[0049] Please see Figures 7 to 9The transmission structure of the intermittent full-weighing vial filling machine also includes two bottle protection mechanisms 700. The two bottle protection mechanisms 700 are identical in structure, each including a fixing component, a sliding frame, and a reciprocating lateral movement assembly, which are used to realize the smooth transfer of vials between the bottle-carrying base plate 101 and the weighing mechanism, ensuring a smooth and efficient filling and weighing process.

[0050] The fasteners are used to fix the bottle conveyor base plate 101 below, providing stable support for the entire bottle protection structure. They include multiple fixing blocks 701, arranged at intervals along the bottle conveying direction, made of steel, and fixedly connected to the lower surface of the bottle conveyor base plate 101 by countersunk bolts. The heads of the countersunk bolts are embedded in the fixing blocks 701 to prevent them from protruding and affecting the operation of other components. Each fixing block 701 has a through-hole perpendicular to the bottle conveying direction. The inner wall of the through-hole is polished, and the surface roughness is controlled to a low level, effectively reducing sliding friction resistance and ensuring smooth movement of the sliding frame.

[0051] The sliding frame, which slides in conjunction with the fixing components, is the core load-bearing component of the bottle protection structure. It has a first support body and a second support body extending upwards on its two sides, located on the left and right sides of the bottle conveying base plate 101, respectively, providing bidirectional positioning and support for the vials. The sliding frame itself consists of a connecting plate 703 and multiple sliding rods 702, which are fixedly connected by welding. The connecting plate 703 extends laterally along the vial conveying direction, its length matching the arrangement length of the fixing blocks 701, and is used to connect the reciprocating lateral movement assembly to receive driving force. Multiple sliding rods 702 are sequentially and vertically connected to one side of the connecting plate 703 in the front-to-back direction, their number corresponding one-to-one with the fixing blocks 701. They are made of high-strength steel with a chrome-plated surface to improve wear resistance and smoothness. The end of each sliding rod 702 furthest from the connecting plate 703 passes through a sliding hole in the corresponding fixing block 701, forming a clearance fit to ensure smooth sliding along the sliding hole, thereby driving the entire sliding frame to reciprocate perpendicular to the vial conveying direction.

[0052] The first support body has a bottle-protecting template 706 extending along the vial conveying direction at its upper end, used to push the vials to the weighing mechanism. The first support body consists of a support plate 704 and a mounting plate 705, which are welded or integrally pressed to form a stable L-shaped structure. The support plate 704 is longitudinally positioned, with its lower end welded to the edge of the sliding frame. The weld is fully welded to ensure connection strength and prevent shaking or breakage during operation. Its height is adapted to the height of the vials, providing stable support for the middle of the vials. The mounting plate 705 is transversely positioned, with one end welded to the top of the support plate 704. It extends along the vial conveying direction, with a length consistent with the front and rear length of the vial-carrying base plate 101, ensuring that the bottle-protecting template 706 covers the entire vial arrangement area. The bottle-protecting template 706 is detachably mounted on the upper surface of the mounting plate 705 using bolts. The mounting plate 705 extends towards the second support body, and its extension length can be flexibly adjusted according to the vial diameter, ensuring that the bottle-protecting template 706 accurately fits the side wall of the vial. In addition, both the support plate 704 and the mounting plate 705 are provided with a hollow structure, which adopts the form of rectangular or strip-shaped through holes and is evenly arranged in the front and back direction. The edges of the hollow structure are rounded to avoid sharp corners scratching the operator or damaging the vial.

[0053] The vial protector template 706 has multiple third semicircular grooves 708 on one side near the second support body, arranged sequentially at intervals along the vial conveying direction. The spacing matches the vial arrangement density, ensuring that each vial can be inserted into a corresponding third semicircular groove 708. The inner diameter of the third semicircular groove 708 matches the outer diameter of the vial, with the gap controlled within a reasonable range. This ensures smooth insertion and removal of the vial while also providing precise positioning, limiting radial displacement, and preventing lateral shifting or rotation during transport. Compared to a planar vial protector structure, the independent positioning design of the third semicircular groove 708 further enhances the stability of the vial protector. Furthermore, multiple sets of third semicircular grooves 708 can accommodate the synchronous transport of multiple vials, improving production efficiency and preventing damage caused by collisions and friction between multiple vials.

[0054] On the side of the bottle protector template 706 near the second support, a protrusion 707 is integrally formed in the middle. Its width matches the width of the weighing mechanism's station. When the sliding frame pushes the vial to the weighing mechanism, the protrusion 707 fits perfectly into the weighing mechanism's station, achieving precise alignment between the bottle protector template 706 and the weighing station. This ensures the vial falls smoothly into the station and prevents it from deviating from its position during the pushing process. Multiple arc-shaped grooves 709 are formed on the side of the protrusion 707 near the second support. Their inner diameter is the same as the third semi-circular groove 708, but their curvature is smaller than that of the third semi-circular groove 708, further improving the positioning accuracy during alignment.

[0055] The second support body has a movable rod 712 extending along the vial conveying direction at its upper end, used to pull the weighed vials back to the vial conveyor base plate 101. The second support body includes multiple support rods 710, arranged longitudinally and spaced apart along the vial conveying direction. The number is determined according to the length of the vial conveyor base plate 101 and the vial arrangement density. The lower end is fixedly connected to the sliding frame to ensure a firm connection and prevent the movable rod 712 from shaking. The movable rod 712 is arranged laterally and fixedly installed on the top of the multiple support rods 710 by bolts. Its side wall near the first support body is smoothly polished to reduce frictional resistance with the vials, prevent scratching the outer wall of the vials, and ensure smooth transfer.

[0056] The lower end of the support rod 710 has an integrally formed insertion section 711. The sliding frame has corresponding insertion through holes at each position, which fit tightly into the insertion through holes. By applying external force to pull the support rod 710, the insertion depth of the insertion section 711 can be adjusted, thereby adjusting the overall height of the support rod 710 and enabling flexible adjustment of the height of the moving rod 712. To ensure stability after adjustment, a locking nut is provided at the connection between the insertion section 711 and the sliding frame. After the support rod 710 is adjusted to a suitable height, tightening the locking nut will fix it, preventing loosening during equipment operation and thus avoiding height deviation of the moving rod 712.

[0057] The reciprocating lateral movement assembly is fixed to the side of the bottle conveying base plate 101 away from the weighing mechanism, connects to the sliding frame and provides driving force to it, driving the sliding frame to reciprocate along a direction perpendicular to the bottle conveying direction, realizing the pushing and pulling action of the bottle. It mainly includes a lateral movement rod 714, an eccentric structure and a rotating power component. The lateral movement rod 714 is set horizontally, with its axis perpendicular to the bottle conveying direction. One end is fixedly connected to the connecting plate 703 of the sliding frame. It is made of high-strength steel and the surface is heat-treated to improve strength and toughness and avoid bending deformation under long-term stress.

[0058] The eccentric structure includes two limiting plates 715 and an eccentric wheel 716. The two limiting plates 715 are fixedly spaced along the transverse rod 714, forming a receiving gap between them. The width of the gap matches the diameter of the eccentric wheel 716, ensuring that the eccentric wheel 716 can be flexibly inserted without wobbling. The eccentric wheel 716 is located within the receiving gap, and its outer wall is tightly fitted with the inner walls of the two limiting plates 715. During rotation, it alternately abuts against the two limiting plates 715, thereby driving the transverse rod 714 to reciprocate axially.

[0059] The rotary power component is located below the transverse rod 714 and provides rotational power to the eccentric wheel 716. Its output end is eccentrically connected to the eccentric wheel 716. The rotary power component consists of a rotary motor 717, a coupling 718, and a central shaft 719, which are connected sequentially from bottom to top. The rotary motor 717 is a servo motor, which can precisely control the speed and rotation angle, ensuring that the sliding frame's movement distance and speed are precisely controllable and adaptable to different filling rhythms. It is fixedly mounted on the equipment frame, with its output shaft facing upwards and connected to the coupling 718. The lower end of the coupling 718 is fixed to the output shaft of the rotary motor 717, and the upper end is connected to the central shaft 719. It has a buffering and shock absorption function, absorbing the vibration generated by the rotary motor 717 during operation. The central shaft 719 is arranged longitudinally, with its lower end connected to the coupling 718 and its upper end connected to the eccentric wheel 716, ensuring that power can be stably transmitted to the eccentric wheel 716, driving its rotation.

[0060] In addition, the bottle protection structure also includes a sealed box 713, which is fixedly installed on the frame. A transverse rod 714 is located inside the box 713, with one end extending out of the box 713 and connecting to the sliding frame. The box 713 has a through hole at a corresponding position that matches the transverse rod 714. The inner wall of the through hole is provided with a sealing sleeve to prevent dust and debris from entering. A circular track coaxial with the central rotating shaft 719 is fixedly installed on the bottom surface of the box 713. The inner diameter matches the outer diameter of the eccentric wheel 716, which can ensure that the eccentric wheel 716 rotates stably along the track and avoid deviation that would cause the transverse rod 714 to move and get stuck.

[0061] The bottle protection structure adopts an integrated design, integrating the bottle protection template 706 and the moving rod 712 on the same sliding frame. This eliminates the separate structure of the push and pull components in the existing technology, which does not require separate mounting brackets, drive components and transmission structures for the two functions. This greatly reduces the number of parts, simplifies the overall structural complexity, and makes the layout more compact, which can meet the overall space design requirements of the filling machine and reduce the size of the equipment and manufacturing costs.

[0062] Meanwhile, the reciprocating transverse component, as the sole driving part, directly drives the sliding frame to move back and forth, synchronously driving the bottle protection template 706 and the moving rod 712 to complete the action. When the sliding frame approaches the weighing mechanism, the bottle protection template 706 pushes the vial to the workstation; when the sliding frame moves away from the weighing mechanism, the moving rod 712 pulls the qualified vial back to the bottle-carrying base plate 101, achieving complete synchronization of the pushing and pulling actions. This solves the problem of insufficient action coordination caused by the independent driving of separate components, avoids vial tilting, offset, collision damage and bottle jamming, ensures the stability of the entire transfer process, and ensures the accuracy of weighing and smooth connection of subsequent processes.

[0063] In summary, the overall operation flow of the transmission structure of this intermittent full-weight vial filling machine is as follows: Feeding stage: The external conveyor line transports the unfilled vials to the feeding end sector plate mechanism 300. The first drive component 304 of the feeding end sector plate mechanism 300 drives the sector plate 301 to rotate, and the vials are transported one by one to the feeding end of the bottle-carrying bottom plate 101 through the second semi-circular groove 302. The support plate 3012 and the anti-fall plate ensure stable transport of the vials.

[0064] Empty bottle conveying and weighing: The bottle conveying drive assembly of the bottle conveying mechanism 200 drives the bottle conveying plate 201 to move forward, and engages the vial through the first semi-circular groove 202, driving the vial to move along the bottle conveyor base plate 101 towards the first weighing mechanism 400; after reaching the designated position, the corresponding bottle protection mechanism 700 of the first weighing mechanism 400 is activated, pushing the vial onto the weighing head 402 for empty bottle weighing, and the weighing data is transmitted to the control system, and qualified vials are pulled back to the bottle conveyor base plate 101.

[0065] Filling stage: The bottle feeding mechanism 200 operates again, transporting the empty and qualified vials to the corresponding position of the filling mechanism 500; the filling drive motor 501 drives the filling needle to descend and insert into the vial mouth, the solenoid valve opens to fill the medicine, and the filling needle returns to its original position after filling is completed.

[0066] Full bottle weighing: The bottle feeding mechanism 200 transports the filled vials to the corresponding position of the second weighing mechanism 600; the bottle protection mechanism 700 of the second weighing mechanism 600 is activated to push the vials onto the weighing head 402 for full bottle weighing, the control system calculates the filling amount, and qualified vials are pulled back to the bottle conveyor base plate 101.

[0067] Discharge stage: The bottle feeding mechanism 200 conveys the full and qualified vials to the discharge end sector plate mechanism 300. The first drive component 304 of the discharge end sector plate mechanism 300 drives the sector plate 301 to rotate, and the vials are conveyed one by one to the external bottle receiving line through the second semi-circular groove 302 to complete the entire filling process.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A transmission structure for an intermittent full-weight vial filling machine, characterized in that, It includes a bottle-carrying bottom rail mechanism (100), a bottle-feeding mechanism (200), two sector-shaped disc mechanisms (300), a first weighing mechanism (400), a filling mechanism (500), and a second weighing mechanism (600); The bottle-carrying bottom rail mechanism (100) includes a bottle-carrying bottom plate (101) extending horizontally along the vial conveying direction for supporting vials; the two ends of the bottle-carrying bottom plate (101) are the feeding end and the discharging end, respectively, and the two fan-shaped disc mechanisms (300) are respectively disposed at the feeding end and the discharging end; The bottle feeding mechanism (200) includes a bottle feeding plate (201), a linkage assembly, and a bottle feeding drive assembly; the bottle feeding plate (201) is horizontally arranged above the bottle conveying base plate (101) along the vial conveying direction, and a plurality of first semi-circular grooves (202) are spaced apart on one side of the bottle feeding plate (201) along its length direction; the linkage assembly is connected to the lower part of the bottle feeding plate (201), and the bottle feeding drive assembly drives the linkage assembly to drive the bottle feeding plate (201) to reciprocate intermittently along the vial conveying direction; The sector disk mechanism (300) includes a sector disk (301) and a first drive component (304); the sector disk (301) has a plurality of second semi-circular grooves (302) spaced apart on its outer circumference; the drive end of the first drive component (304) is connected upward to the center of the sector disk (301) for driving the sector disk (301) to rotate. The first weighing mechanism (400), the filling mechanism (500) and the second weighing mechanism (600) are arranged sequentially along the vial conveying direction and are all located between the two fan-shaped disk mechanisms (300). They are used to weigh vials that have not been filled with medicine, fill vials with medicine, and weigh vials that have been filled with medicine, respectively.

2. The transmission structure as described in claim 1, characterized in that, The lower end of the bottle-carrying base plate (101) is provided with a plurality of bottle-carrying support columns (102) spaced apart along the length direction; the lower end of the bottle-carrying support column (102) is fixed, and the upper end is fixedly connected to the lower end surface of the bottle-carrying base plate (101); the upper end surface of the bottle-carrying base plate (101) is provided with an antistatic layer (103) for contacting the bottom of the vial.

3. The transmission structure as described in claim 1, characterized in that, Each of the sector disk mechanisms (300) includes a plurality of sector disks (301); the plurality of sector disks (301) are arranged coaxially in the circumferential direction, and a buffer gap is provided between two adjacent sector disks (301); The first driving component (304) is multiple and is connected one-to-one with the multiple sector disks (301) to drive the multiple sector disks (301) to rotate respectively, and to make the sector disks (301) behind the rotation direction rotate intermittently through the buffer gap.

4. The transmission structure as described in claim 3, characterized in that, The outer circle of the fan-shaped disk (301) is provided with a groove (3011) along the circumference, and a plurality of second semi-circular grooves (302) are respectively provided on the upper and lower sides of the groove (3011); the lower end face of the fan-shaped disk (301) is provided with an outwardly extending support plate (3012). Below the sector disc (301) is a mounting bracket (303), and the edge of the mounting bracket (303) is provided with a fall prevention plate. The fall prevention plate is located outside the sector disc (301) and forms a conveying gap with the outer circle of the sector disc (301). The fall prevention plate is set on the feeding side of the feeding end or the discharging side of the discharging end along the rotation direction of the sector disc (301).

5. The transmission structure as described in claim 1, characterized in that, The linkage assembly includes four active swing arms (203), which are arranged in pairs at both ends of the bottle feeding plate (201); The bottle feeding drive assembly includes four active drive components (204), and the four active drive components (204) are connected one-to-one with the four active swing arms (203); the other ends of the two active swing arms (203) at the same end are coaxially rotatably connected to the lower end of the bottle feeding plate (201); Each of the active swing arms (203) has a hinge shaft in the middle, which divides the active swing arm (203) into two hinge segments, so that the two active swing arms (203) at the same end form a four-bar linkage structure.

6. The transmission structure as described in claim 5, characterized in that, The linkage assembly also includes two auxiliary swing arms (205); one end of the two auxiliary swing arms (205) is connected to two active swing arms (203) at any end via two linkage groups (206), and the other end of the two auxiliary swing arms (205) is coaxially rotatably connected to the middle of the lower end of the bottle feeding plate (201); Each of the auxiliary swing arms (205) has a hinge shaft in the middle, which divides the auxiliary swing arm (205) into two hinge segments, so that the two auxiliary swing arms (205) form a four-bar linkage structure.

7. The transmission structure as described in claim 1, characterized in that, The first weighing mechanism (400) and the second weighing mechanism (600) have the same structure, both including a weighing sensor (401), a weighing head (402) and a weighing support (403); the weighing support (403) is fixed longitudinally, the weighing sensor (401) is fixed to the top of the weighing support (403), and the weighing head (402) is connected to the upper side of the weighing sensor (401).

8. The transmission structure as described in claim 1, characterized in that, The filling mechanism (500) includes a filling drive motor (501), a needle holder lifting rod (502), and a needle holder plate (503); the needle holder lifting rod (502) is arranged longitudinally, and the needle holder plate (503) is fixed laterally to the top of the needle holder lifting rod (502); a plurality of filling needles are arranged laterally at intervals on the needle holder plate (503), with the needle tips facing downwards; The filling drive motor (501) is arranged horizontally and drives the needle holder lifting rod (502) to rise and fall through a worm gear structure, thereby causing the needles of multiple filling needles to insert into or detach from the vial.

9. The transmission structure as described in claim 1, characterized in that, It also includes two bottle protection mechanisms (700); the two bottle protection mechanisms (700) are arranged sequentially along the vial conveying direction and correspond to the first weighing mechanism (400) and the second weighing mechanism (600) respectively; the bottle protection mechanism (700) has a degree of freedom to reciprocate perpendicular to the vial conveying direction; The bottle protection mechanism (700) corresponding to the first weighing mechanism (400) is used to push multiple vials from the bottle bottom plate (101) to the first weighing mechanism (400) for weighing, or to pull the weighed vials back to the bottle bottom plate (101). The bottle protection mechanism (700) corresponding to the second weighing mechanism (600) is used to push multiple vials that have been filled from the bottle bottom plate (101) to the second weighing mechanism (600) for weighing, or to pull the weighed vials back to the bottle bottom plate (101).

10. The transmission structure as described in claim 9, characterized in that, The bottle protection mechanism (700) includes: A fastener is fixed below the bottom plate (101) of the bottle conveyor; The sliding frame is slidably engaged with the fixing component. The sliding frame is provided with an upwardly extending first support body and a second support body on both sides. The first support body and the second support body are located on the left and right sides of the bottle conveying bottom plate (101). The upper end of the first support body is provided with a bottle protection template (706) extending along the bottle conveying direction. The upper end of the second support body is provided with a moving rod (712) extending along the bottle conveying direction. A reciprocating lateral movement assembly is used to fix the bottle conveyor base plate (101) on the side away from the first weighing mechanism (400) or the second weighing mechanism (600). The reciprocating lateral movement assembly is connected to the sliding frame and is used to drive the sliding frame to reciprocate in a direction perpendicular to the bottle conveying direction, so as to push the bottle to the first weighing mechanism (400) or the second weighing mechanism (600) by means of the bottle protection template (706), or to pull the bottle back to the bottle conveyor base plate (101) by means of the moving rod (712).

Images