Star wheel bottle removing structure of liquid packaging machine

Abstract

The invention discloses a star wheel bottle removing structure of a liquid packaging machine. The star wheel bottle removing structure comprises a star wheel disc, a star wheel assembly connected with the star wheel disc and used for driving the star wheel disc to rotate and an outer protection plate arranged on the periphery of the star wheel disc, and a conveying gap for conveying bottles is formed between the star wheel disc and the outer protection plate; a plurality of bottle clamping plates are arranged on the outer edge of the star wheel disc at intervals, the star wheel disc is further provided with a plurality of sets of sliding grooves which are formed in the radial direction and correspond to the bottle clamping plates in a one-to-one mode, and the bottoms of the bottle clamping plates are arranged in the corresponding sliding grooves in a matched and penetrating mode through limiting columns so that the bottle clamping plates can slide along the sliding grooves. A plurality of arc grooves are formed in the outer edges, opposite to the outer protection plate, of the bottle clamping plates at intervals, and a transmission assembly is arranged on the star wheel disc, connected with the bottle clamping plates and used for driving the bottle clamping plates to slide along the sliding grooves so as to change the size of the transmission gap. By the adoption of the structure, bottles can be conveniently taken down from the star wheel without shutdown and disassembly, the situation that equipment is damaged and the bottles are broken when faults occur is well reduced, and production efficiency and product quality are improved.

Description

Technical Field

[0001] This invention relates to the field of filling equipment technology, and specifically to a star wheel bottle-removing structure for a liquid packaging machine. Background Technology

[0002] In liquid packaging machinery, the conveying methods for filling bottles are mainly divided into bottle neck conveying and bottle bottom conveying. Among them, bottle neck conveying uses a bottle neck star wheel to support the neck of the filling bottle, which works in conjunction with the outer protective plate to clamp the bottle mouth. A bottle body star wheel is also set up to support the bottle body. The bottles are smoothly conveyed to the next process through the star wheels. Its structure is simple and easy to operate. However, with the increasing demand for product diversification, existing bottle neck conveying structures require machine shutdown and adjustment of the gap between the bottle-hanging star wheel and the outer guard plate to accommodate different bottle types. Furthermore, in case of bottle jamming or star wheel overload, the machine must be stopped and the entire star wheel structure disassembled to remove bottles from each station on the star wheel. These adjustments and disassemblies are not only time-consuming and labor-intensive, significantly impacting production efficiency, but also, because liquid packaging machines often cannot be stopped promptly, the star wheel continues to rotate even in the event of a malfunction. This can cause bottles to collide with the equipment, resulting in bottle damage, breakage, and equipment damage, hindering subsequent processes. In severe cases, the bottles may even need to be completely destroyed before removal, affecting product quality and increasing production costs. Therefore, a new star wheel bottle-removing structure is urgently needed to solve these problems. Summary of the Invention

[0003] The purpose of this invention is to provide a star wheel bottle removal structure for a liquid packaging machine, which can easily remove bottles from the star wheel without stopping the machine to disassemble it when a conveying failure occurs. This can effectively reduce equipment damage and bottle breakage during failures, and help improve production efficiency and product quality.

[0004] The star wheel bottle-removing structure of the liquid packaging machine of the present invention includes a star wheel disk, a star wheel assembly connected to the star wheel disk and used to drive the star wheel disk to rotate, and an outer protective plate disposed around the star wheel disk. A transmission gap for conveying bottles is formed between the star wheel disk and the outer protective plate. Multiple bottle-holding plates are spaced apart on the outer edge of the star wheel disk. The star wheel disk also has multiple sets of sliding grooves arranged radially and corresponding one-to-one with each bottle-holding plate. The bottom of the bottle-holding plate is adapted to pass through the corresponding sliding groove through a limiting post, so that the bottle-holding plate can slide along the sliding groove. Several arc grooves are spaced apart on the outer edges of the bottle-holding plate opposite to the outer protective plate. There is also a transmission assembly disposed on the star wheel disk, connected to each bottle-holding plate, and used to drive each bottle-holding plate to slide along the sliding groove to change the size of the transmission gap.

[0005] The star wheel bottle-picking structure of the liquid packaging machine has a transmission component on the star wheel disk that connects the bottle-holding plates on the outer edge of the star wheel disk together as a whole bottle-hanging star wheel. Each bottle-holding plate is engaged in the corresponding radially set slide groove by the bottom limiting post, so that the transmission component can drive each bottle-holding plate to slide radially along the slide groove, thereby changing the transmission gap between the bottle-holding plate and the outer protective plate. In the initial unclamped state, the transmission component controls each bottle clamping plate to slide towards the outer edge of the star wheel disk according to the specifications of the bottles being transported. This presets the transport gap size to suit the bottle specifications. When the bottle is transported along the bottle path into the transport gap, the bottle neck can be clamped in one of the arc grooves on the bottle clamping plate, cooperating with the outer protective plate to hold the bottle. The bottle moves with the rotation of the star wheel disk to achieve transport. When bottle jamming or star wheel overload occurs at the star wheel disk station and bottles need to be removed, the transmission component controls each bottle clamping plate to move synchronously along the slide groove away from the outer protective plate. This allows the bottles at each station of the star wheel disk to automatically detach from the transport gap, thus easily removing the bottles from the star wheel disk without stopping the machine for disassembly. This effectively avoids serious bottle jamming and machine collision problems caused by continuous bottle transport at each station, ensuring the normal operation of each process and improving production efficiency and product quality.

[0006] As a further preferred embodiment of the present invention, the transmission assembly includes a driver fixed on the star wheel disk and a mounting bracket disposed on the driver. Each bottle-holding plate has a first connecting seat on its top. The outer periphery of the mounting bracket is provided with a plurality of second connecting seats corresponding one-to-one with each of the first connecting seats. A connecting rod is provided between each first connecting seat and its corresponding second connecting seat. One end of the connecting rod is hinged to the first connecting seat and the other end is hinged to the second connecting seat. The driver is used to drive the mounting bracket to move up and down, so as to drive each bottle-holding plate to slide along the slide groove through the connecting rod.

[0007] As a further preferred embodiment of the present invention, the driver is a cylinder, the cylinder includes a piston rod and a cylinder body, the cylinder body is fixedly connected to the star wheel, and one end of the piston rod is fixedly connected to the mounting bracket.

[0008] As a further preferred embodiment of the present invention, the star wheel assembly includes a star wheel seat, a drive shaft disposed within the star wheel seat and extending out of the star wheel seat, and the star wheel disk is fixed on the drive shaft and can rotate relative to the star wheel seat with the drive shaft.

[0009] As a further preferred embodiment of the present invention, the star wheel assembly further includes a first bearing and a second bearing, both of which are sleeved on the transmission shaft. The inner wall of one end of the star wheel seat is fixedly connected to the outer wall of the first bearing, and the inner wall of the other end of the star wheel seat is fixedly connected to the outer wall of the second bearing.

[0010] As a further preferred embodiment of the present invention, the star wheel assembly further includes a base plate frame, the star wheel seat is detachably connected to the base plate frame, the drive shaft passes through the base plate frame and the star wheel seat, and the outer protective plate is detachably connected to the base plate frame via a support column.

[0011] As a further preferred embodiment of the present invention, the transmission shaft is also provided with a vent pipe for connecting its upper and lower ends, and both ends of the vent pipe are connected to rotatable air pipe joints.

[0012] As a further preferred embodiment of the present invention, a stepped portion is provided along the circumference of the outer edge of the star wheel disk. The stepped portion includes an outer low plane, an inner high plane, and a step between the high and low planes. Each bottle-holding plate and its corresponding sliding groove are provided on the low plane. When the limiting post of the bottle-holding plate is at the end of the sliding groove near the inner side of the star wheel disk, the inner side of the bottle-holding plate is adapted to abut against the step.

[0013] As a further preferred embodiment of the present invention, each card plate has three limiting posts at its bottom, and the positions of each limiting post form the three corners of a triangle. Each set of sliding grooves corresponding to each card plate includes three sub-sliding grooves corresponding to the three limiting posts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the star wheel bottle-clamping structure of a liquid packaging machine when clamping a bottle.

[0015] Figure 2 for Figure 1 Sectional view of AA.

[0016] Figure 3 This is a schematic diagram of the star wheel bottle-removing structure of a liquid packaging machine when the bottle is not clamped.

[0017] Figure 4 for Figure 1 A cross-sectional view of BB.

[0018] Figure 5 for Figure 1 A magnified view of part C in the middle.

[0019] Figure 6 for Figure 3 A magnified view of part D in the middle.

[0020] Figure 7 for Figure 2 A magnified view of part E in the middle.

[0021] Figure 8 for Figure 4 A magnified view of part F in the middle.

[0022] Figure 9 These are the sectional and top views of the star wheel.

[0023] Figure 10 These are the sectional and top views of the cardboard plate.

[0024] Figure 11 This is a schematic diagram of the star wheel assembly.

[0025] Figure 12 The sectional and top views show the mounting bracket.

[0026] Figure 13 The images show the side view, sectional view, and top view of the first / second connecting seat.

[0027] Figure 14 This is a schematic diagram of the connecting rod.

[0028] Figure 15 This is a structural schematic diagram of the outer protective panel.

[0029] In the diagram: 1-Star wheel; 11-Slide groove; 111-Divided slide groove; 12-Step section; 121-Lower plane; 122-High plane; 123-Step; 2-Star wheel assembly; 21-Star wheel seat; 22-Drive shaft; 221-Ventilation pipe; 222-Rotable air pipe connector; 23-First bearing; 24-Second bearing; 25-Base plate frame; 26-Base; 27-Bottle body star wheel; 3-Outer protective plate; 31-Support column; 4-Bottle clamping plate; 41-Limiting column; 42-Circular arc groove; 43-First connecting seat; 44-Pad plate; 45-Fixing bolt; 5-Transmission assembly; 51-Cylinder; 511-Piston rod; 512-Cylinder body; 52-Mounting bracket; 53-Second connecting seat; 54-Connecting rod; 55-Support frame; 6-Bottle; 7-Pneumatic control assembly; 8-Transmission gap. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] If the embodiments of this invention involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical features of each embodiment can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the embodiments are described; however, as long as these combinations of technical features do not contradict each other, they should be considered within the scope of this specification.

[0034] like Figures 1 to 15 As shown, the star wheel bottle-removing structure of the liquid packaging machine in this embodiment includes a star wheel disk 1, a star wheel assembly 2 connected to the star wheel disk 1 and used to drive the star wheel disk 1 to rotate, and an outer protective plate 3 disposed around the star wheel disk 1. The star wheel disk 1 is fixedly connected to the star wheel assembly 2 by screws or other fasteners. The star wheel assembly 2 drives the star wheel disk 1 to rotate, so as to be used as a bottle-hanging star wheel. A transmission gap 8 is formed between the star wheel disk 1 and the outer protective plate 3 to clamp and transport the bottle 6. The bottle neck is located in the transmission gap 8. The bottle 6 is held between the star wheel 1 and the outer protective plate 3, and the rotation of the star wheel 1 drives the bottle 6 to move. Multiple bottle-holding plates 4 are spaced apart on the outer edge of the star wheel 1, each corresponding to a certain number of bottle positions. The star wheel 1 also has multiple sets of radially arranged grooves 11 that correspond one-to-one with each bottle-holding plate 4. The bottom of each bottle-holding plate 4 is fitted into the corresponding groove 11 by a limiting post 41, allowing the bottle-holding plate 4 to slide radially along the groove 11. Additionally, as... Figure 7 , Figure 8A pad 44 is provided at the bottom of the limiting post 41. The pad 44 is located below the slide groove 11, and its size is larger than the size of the slide groove, so that it cannot pass through the slide groove. The pad 44 has a screw hole. The fixing bolt 45 passes through the screw hole from bottom to top and is screwed into the limiting post 41, so that the pad 44 is fixed at the bottom of the limiting post 41 and below the slide groove 11, preventing the limiting post 41 from leaving the slide groove 11 upwards. This can more securely limit the bottle clamping plate 4 in the slide groove 11, ensuring that the bottle clamping plate 4 will not detach from the slide groove 11 when sliding along the slide groove 11. When disassembly is required, the fixing bolt 45 can be loosened to remove the bottle clamping plate 4. The lower pad 44 is sufficient, and the pad 44 can also play a certain role in shock absorption and buffering, reducing wear on the star wheel 1; several arc grooves 42 are also provided at intervals on the outer edge of the bottle clamping plate 4 and the outer protective plate 3, each arc groove 42 corresponds to a bottle station, so that the bottle neck can be fitted and clamped on the arc groove 42; there is also a transmission component 5 provided on the star wheel 1 and connected to each bottle clamping plate 4. The transmission component 5 is used to drive each bottle clamping plate 4 to slide along the slide groove 11, so as to change the size of the transmission gap 8 according to the bottle size, so that the bottle can be adapted to be transported in the transmission gap 8.

[0035] Specifically, such as Figure 2 , Figure 4 The transmission assembly 5 includes a driver fixed to the star wheel 1 and a mounting bracket 52 located above the driver. Each bottle-holding plate 4 has a first connecting seat 43 on its top. The outer periphery of the mounting bracket 52 has multiple second connecting seats 53 corresponding to each of the first connecting seats 43. The second connecting seats 53 are spaced apart around the outer periphery of the mounting bracket 52. Figure 12 As shown, each first connecting seat 43 and its corresponding second connecting seat 53 are provided with a connecting rod 54. One end of the connecting rod 54 is hinged to the first connecting seat 43, and the other end is hinged to the second connecting seat 53, so that each connecting rod 54 is arranged obliquely downward from the center of the star wheel disk 1 to the outer edge, forming an umbrella-like structure. The driver is used to drive the mounting bracket 52 to move up and down, so as to drive each bottle holder 4 to slide along the slide groove 11 through the connecting rod 54. In this structure, the driver can drive the mounting bracket 52 to rise, which is from Figure 2 State transition to Figure 4 In this state, one end of the connecting rod 54, hinged to the second connecting seat 53 of the mounting bracket 52, moves upward, while the other end of the connecting rod 54, hinged to the first connecting seat 43 of the bottle clamping plate 4, moves inward toward the star wheel 1, causing the bottle clamping plate 4 to move radially inward toward the star wheel 1 along the slide groove 11. Figure 6 , Figure 8As shown, this causes the multiple bottle-holding plates 4 surrounding the outer edge of the star wheel 1 to retract inward, correspondingly increasing the transmission gap 8. The arc groove 42 disengages from the bottle neck, allowing the bottle 6 to fall from the transmission gap 8, or to adapt to a larger bottle size when changing bottle specifications. Conversely, the mounting bracket 52 can be controlled to descend, causing the multiple bottle-holding plates 4 surrounding the outer edge of the star wheel 1 to move outward, such as... Figure 5 , Figure 7 The transmission gap 8 is correspondingly reduced, allowing the arc groove 42 to clamp the bottle neck for transporting the bottle 6, or to adapt it to smaller bottles when changing bottle sizes. This structure ensures that each bottle clamping plate 4 is subjected to uniform force, allowing the overall movement of each bottle clamping plate 4 to be stable, and ensuring accurate adjustment of the transmission gap 8.

[0036] The actuator can be a cylinder 51, such as... Figure 2 , Figure 4 As shown, the cylinder includes a piston rod 511 and a cylinder body 512. The cylinder body 512 is fixedly connected to the star wheel 1, and one end of the piston rod 511 is fixedly connected to the mounting bracket 52. The cylinder body 512 is connected to the existing pneumatic control components 7, such as the pneumatic control valve, through an air pipe. The pneumatic control components 7 control the operation of the cylinder 51. When inflating, the piston rod 511 extends upward, causing the mounting bracket 52 to move upward, thereby moving each bottle clamping plate 4 through the connecting rod 54. To facilitate the installation of the air pipe, a support frame 55 can be set between the cylinder 51 and the star wheel 1, so that the cylinder body 512 is fixed to the star wheel 1 through the support frame 55. Space is left below the cylinder body 512 for the arrangement of the air pipe, for example, the air pipe can be connected to the upper end of the ventilation pipe 221 in the drive shaft 22, making its spatial arrangement more reasonable.

[0037] In the above-mentioned star wheel bottle-removing structure, the first and second connecting seats are as follows: Figure 13 As shown, the structure of link 54 is as follows: Figure 14As shown, the two ends of the connecting rod 54 are hinged to the first and second connecting seats respectively, so that the mounting bracket 52 above the cylinder 51 is connected to each bottle clamping plate 4. Each bottle clamping plate 4 is clamped in the corresponding radially arranged sliding groove 11 by the bottom limiting post 41, and slides with the star wheel 1 to form a bottle hanging star wheel as a whole. Thus, the movement of the connecting rod 54 can be driven by the extension and retraction movement of the cylinder 51, thereby driving each bottle clamping plate 4 to slide radially along the sliding groove 11, changing the size of the transmission gap 8 between the bottle clamping plate 4 and the outer protective plate 3. In the initial unclamped state, the cylinder 51 controls each bottle clamping plate 4 to slide towards the outer periphery of the star wheel 1 according to the specifications of the bottle being transported, thereby presetting the size of the transport gap 8 to adapt to the bottle specifications. When the bottle 6 is transported to the transport gap 8 along the bottle path, the bottle neck can be clamped in one of the arc grooves 42 on the bottle clamping plate 4, which cooperates with the outer protective plate 3 to hold the bottle 6. The bottle 6 moves with the rotation of the star wheel 1 to achieve transport. When changing the bottle specifications, the cylinder can also control each bottle clamping plate 4 to move on the slide groove 11 without stopping the machine. The operation is convenient and ensures the smooth progress of each process.

[0038] In this embodiment, when a malfunction occurs at the station before the star wheel on the bottle-carrying path, requiring bottle rejection (e.g., when the filling machine before the conveyor malfunctions), the system provides a signal to the pneumatic control component. The pneumatic control component transmits the signal to the cylinder 51, causing the cylinder piston rod 511 to extend upwards, driving each bottle-clamping plate 4 to retract radially along the slide 11. Bottles on the star wheel and bottles from the preceding station can then automatically fall and be rejected, avoiding bottle jamming and collisions at subsequent stations due to problems at the preceding station. Similarly, when a bottle is stuck at the star wheel station, causing the torque converter to overload, the system can also provide a signal to the pneumatic control component, which transmits the signal to the cylinder 51, causing the cylinder piston rod 511 to extend upwards. 11 extends upwards, causing each bottle-holding plate 4 to retract radially along the slide 11. Bottles on the star wheel and bottles coming from the previous station can automatically fall down and be rejected, avoiding more serious bottle jamming and collision problems caused by continued feeding of bottles from the previous station. When debugging is required, or when temporary production adjustments require removing bottles from the star wheel station, a control signal can be manually given to the pneumatic control component. The signal is transmitted to the cylinder 51, causing the cylinder piston rod 511 to extend upwards, causing each bottle-holding plate 4 to retract radially along the slide 11, so that all bottles on the star wheel automatically fall down. This allows workers to easily remove products at specific workstations to check the situation or promptly reject defective products, preventing them from flowing into subsequent workstations.

[0039] Therefore, with this structure, when a bottle needs to be removed due to a fault such as bottle jamming or star wheel overload at the star wheel station, the transmission component 5 can control each bottle jamming plate 4 to move along the slide groove 11 in a direction away from the outer protective plate 3, as shown in the figure. Figures 5 to 6This state allows bottles on each station of the star wheel 1 to automatically detach from the transmission gap 8, thus enabling timely and convenient removal of bottles from the star wheel 1 without stopping the machine for disassembly. It is well-suited to the normal operation of each process in existing liquid packaging machines, avoiding serious bottle jamming and machine collision problems caused by continuous conveying of bottles at each station. It will not interfere with the operation of other equipment, ensuring the normal operation of each process and helping to improve production efficiency and product quality.

[0040] Specifically, such as Figure 11 The star wheel assembly 2 includes a star wheel seat 21 and a drive shaft 22 disposed within and extending out of the star wheel seat 21. The star wheel disk 1 is fixed on the drive shaft 22 and can rotate relative to the star wheel seat 21 with the drive shaft 22. Specifically, the star wheel assembly 2 is also equipped with a bearing group, which includes a first bearing 23 and a second bearing 24. The first bearing 23 and the second bearing 24 are both sleeved on the drive shaft 22. The inner wall of one end of the star wheel seat 21 is fixedly connected to the outer wall of the first bearing 23, and the inner wall of the other end of the star wheel seat 21 is fixedly connected to the outer wall of the second bearing 24. The bearing group enables the star wheel disk 1 to rotate more smoothly and steadily, reducing the jumping situation when the star wheel disk transports bottles, thereby further reducing bottle damage and breakage. The star wheel assembly 2 also includes a base frame 25, on which the star wheel seat 21 is detachably connected. A drive shaft 22 passes through the base frame 25 and the star wheel seat 21. The outer protective plate 3 is detachably connected to the base frame 25 via a support column 31, making the structure more compact and ensuring stable installation of the outer protective plate. A bottle body star wheel 27 is also installed on the star wheel seat 21, allowing it to rotate synchronously with the star wheel disk 1. The bottle body star wheel 27 supports the bottle body and, together with the bottle clamping plate 4, provides clamping and limiting functions for the bottle, making bottle transport more stable. The bottom of the star wheel seat 21 is fastened to the base 26 via a flange and bolts, with the base 26 providing support for the star wheel seat 21.

[0041] The drive shaft 22 is also provided with a ventilation pipe 221 for connecting its upper and lower ends. The cylinder 51 above the star wheel 1 is connected to the upper end of the ventilation pipe 221 through the air pipe, and the pneumatic control component 7 is connected to the lower end of the ventilation pipe 221. This makes the structure more compact and allows for more flexible arrangement of the air pipe positions of the pneumatic control component and the cylinder. Both the upper and lower ends of the ventilation pipe 221 are provided with rotatable air pipe joints 222. The rotatable air pipe joints 222 are connected to the air pipes of the cylinder and the pneumatic control component 7 through the air pipe joints 222, ensuring that the position of the cylinder and the pneumatic control component is not affected during the rotation of the star wheel 1.

[0042] In addition, such as Figure 10 Each card plate 4 has three limiting posts 41 at its bottom, and the positions of the limiting posts 41 form the three corners of a triangle, such as... Figure 9Each set of sliding grooves 11 corresponding to each bottle-holding plate 4 specifically includes three sub-sliding grooves 111 corresponding to three limiting posts 41. A limiting post 41 is inserted into each sub-sliding groove 111. By combining multiple sub-sliding grooves 111 into a set of sliding grooves 11, the sliding stability of the bottle-holding plate 4 can be improved. The triangular layout formed by the limiting posts 41 can further provide stability and strength to the bottle-holding plate 4. Figure 7 , Figure 8 Furthermore, a step portion 12 can be provided along the circumference of the outer edge of the star wheel disk 1. The step portion 12 includes an outer low plane 121, an inner high plane 122, and a step 123 between the high and low planes. Each bottle-holding plate 4 and its corresponding sliding groove 11 are provided on the low plane 121. When the limiting post 41 of the bottle-holding plate 4 is at the end of the sliding groove 11 near the inner side of the star wheel disk 1, the inner side of the bottle-holding plate 4 can be adapted to abut against the step 123, thereby the step portion 12 further limits the bottle-holding plate 4 to prevent the bottle-holding plate 4 from further shrinking towards the inner side of the star wheel disk and avoid over-adjustment.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A star wheel bottle rejecting structure of a liquid packaging machine, comprising a star wheel disc (1), a star wheel assembly (2) connected with the star wheel disc and used to drive the star wheel disc to rotate, an outer guard plate (3) arranged at the periphery of the star wheel disc, and a transmission gap for conveying bottles formed between the star wheel disc and the outer guard plate; characterized in that, The outer edge of the star wheel disc is provided with a plurality of bottle clamping plates (4) at intervals, and the star wheel disc is further provided with a plurality of groups of sliding grooves (11) arranged in the radial direction and corresponding to the bottle clamping plates one by one, the bottom of the bottle clamping plate is adapted to be penetrated into the corresponding sliding groove through a limiting column (41), so that the bottle clamping plate can slide along the sliding groove, a plurality of circular arc grooves (42) are arranged at intervals on the outer edge of the bottle clamping plate opposite to the outer shield, and a transmission assembly (5) is arranged on the star wheel disc and connected with each bottle clamping plate and used for driving each bottle clamping plate to slide along the sliding groove to change the size of the transmission gap.

2. The starwheel bottle rejection structure of a liquid packaging machine according to claim 1, characterized in that, The transmission assembly comprises a driver fixed on the star wheel disc, and a mounting bracket (52) arranged on the driver, the top of each bottle clamping plate is provided with a first connecting seat (43), and the outer peripheral edge of the mounting bracket is provided with a plurality of second connecting seats (53) corresponding to each first connecting seat, and a connecting rod (54) is arranged between each first connecting seat and its corresponding second connecting seat, one end of the connecting rod is hinged to the first connecting seat, and the other end is hinged to the second connecting seat, and the driver is used for driving the mounting bracket to move up and down, so as to drive each bottle clamping plate to slide along the sliding groove through the connecting rod.

3. The starwheel bottle rejection structure of a liquid packaging machine according to claim 2, characterized in that, The driver is a gas cylinder (51), the gas cylinder comprises a piston rod (511) and a cylinder body (512), the cylinder body is fixedly connected with the star wheel disc, and one end of the piston rod is fixedly connected with the mounting bracket.

4. The starwheel bottle rejection structure of a liquid packaging machine according to claim 1, wherein, The star wheel assembly comprises a star wheel seat (21) and a transmission shaft (22) arranged in the star wheel seat and extending out of the star wheel seat, and the star wheel disc is fixedly arranged on the transmission shaft and can rotate with the transmission shaft relative to the star wheel seat.

5. The starwheel bottle rejection structure of a liquid packaging machine according to claim 4, wherein, The star wheel assembly further comprises a first bearing (23) and a second bearing (24), the first bearing and the second bearing are sleeved on the transmission shaft, and the inner wall of one end of the star wheel seat is fixedly connected with the outer wall of the first bearing, and the inner wall of the other end of the star wheel seat is fixedly connected with the outer wall of the second bearing.

6. The starwheel bottle rejection structure of a liquid packaging machine according to claim 4, wherein, The star wheel assembly further comprises a bottom plate frame (25), the star wheel seat is detachably connected to the bottom plate frame, the transmission shaft is arranged through the bottom plate frame and the star wheel seat, and the outer shield is detachably connected to the bottom plate frame through a supporting column (31).

7. The starwheel bottle rejection structure of a liquid packaging machine according to claim 4, wherein, The transmission shaft is further provided with an air passage (221) for communication between the upper and lower ends of the transmission shaft, and a rotatable air pipe joint (222) is connected to the upper and lower ends of the air passage.

8. The starwheel bottle rejection structure of a liquid packaging machine according to claim 1, wherein, A step portion (12) is arranged at the outer edge of the star wheel disc along the circumferential direction thereof, the step portion comprises a low plane (121) on the outer side, a high plane (122) on the inner side, and a step (123) between the high plane and the low plane, each bottle clamping plate and its corresponding sliding groove are arranged on the low plane, and when the limiting column of the bottle clamping plate is located at one end of the sliding groove close to the inner side of the star wheel disc, the inner side of the bottle clamping plate abuts against the step.

9. The starwheel bottle rejection structure of a liquid packaging machine according to claim 1, wherein, The limiting column at the bottom of each bottle clamping plate is provided with three limiting columns, and the positions of the limiting columns form three angles of a triangle, and each group of sliding grooves corresponding to each bottle clamping plate comprises three sub-sliding grooves (111) corresponding to the three limiting columns.

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