Feeding device for assembling syringes

Abstract

The utility model discloses a kind of feeding devices for syringe assembly, including rack, still including height adjusting assembly being arranged in the one side of rack, detachably mounted in the other side of rack mounting bracket, fixedly connected on mounting bracket fixed frame, installation bolt being arranged on rack, slidingly connected on mounting bracket guiding limit plate.Through the drive assembly drive two sides guiding limit plate and rotating roller to carry out mutual close or far away movement, can be conveniently adjusted spacing according to different diameter size piston, realize the adaptation to different specifications piston;And through several groups and symmetrically distributed on guiding limit plate rotating roller, while playing the central guiding effect to piston, guaranteeing piston conveying path stability, can effectively reduce the frictional resistance when piston is transported, cooperate conveying component to ensure that piston is normally transported, avoid the situation that feeding is jammed even stagnates, significantly improve the practicality of device, improve the reliability of device in long-term use.

Description

Technical Field

[0001] This utility model relates to the field of feeding device technology, and in particular to a feeding device for syringe assembly. Background Technology

[0002] The syringe consists of a piston and a syringe. During assembly, the piston and syringe need to be fed to maintain the operation of the equipment. During the feeding of the piston, the piston is transported by a conveyor, and limit plates are set on both sides of the piston to ensure that the piston remains vertical.

[0003] According to the patent application CN219708358U, "This utility model discloses an automatic piston feeding device for syringe assembly, including a bracket, a frame mounted on the bracket, a conveyor inside the frame, an installation groove on the frame, an installation plate at the corresponding position of the installation groove, an electric push rod on the inner side of the installation plate, a push plate at the opposite end of the electric push rod, and a detachable limiting plate bolted to the opposite side of the push plate. This utility model, by setting a movable push plate and a detachable limiting plate, allows the push plate and the detachable limiting plate to move closer or further apart to accommodate different types of pistons. Furthermore, the detachable limiting plate can be removed individually to accommodate special types of pistons, improving the adaptability of the equipment and solving the problem that most traditional piston feeding mechanisms cannot be easily adjusted according to the piston's thickness and appearance." Regarding the above description, the applicant believes the following issues exist: In practical use, although the removable limiting plates on both sides of the present invention achieve the function of limiting and guiding the piston to ensure the stability of the piston on the conveying path, the piston itself is made of a relatively soft material. When the conveyor drives the piston to carry out the conveying operation, if the installation distance of the removable limiting plates on both sides is set too close, it is very easy to over-clamp the soft piston. This clamping force will cause the piston to deform due to the material properties, or directly form a large frictional resistance with the limiting plate, which will cause the conveyor to be unable to drive the piston forward smoothly, resulting in feeding jams or even stagnation. Ultimately, this significantly reduces the actual use effect and practicality of the device. Therefore, it is necessary to improve the feeding device for syringe assembly to solve the above problems. Utility Model Content

[0004] In order to overcome the problem that although it relies on the removable limiting plates on both sides to limit and guide the piston to ensure the stability of the conveying, the piston material is relatively soft. If the installation distance of the limiting plates is too close, the soft piston is easily clamped too much when the conveyor conveys the piston, which will lead to piston deformation or large frictional resistance with the limiting plates, causing feeding jams or even stoppages, and ultimately greatly reducing the actual use effect and practicality of the device.

[0005] The technical solution of this utility model is as follows: a feeding device for syringe assembly, including a frame, a height adjustment component disposed on one side of the frame, a mounting bracket detachably mounted on the other side of the frame, a fixing bracket fixedly connected to the mounting bracket, a mounting bolt disposed on the frame, a guide limiting plate slidably connected to the mounting bracket, a rotating roller rotatably connected to the guide limiting plate, a conveying component disposed on the frame, and a driving component disposed on the mounting bracket and the fixing bracket. The mounting bolt is threadedly connected to the mounting bracket. The driving component is used to drive the guide limiting plates and the rotating roller on both sides to move closer or further away synchronously. The height adjustment component is used to adjust the height of the frame. The conveying component is used to transport the piston.

[0006] In a preferred embodiment of this technical solution, the rack has a mounting slot at the corresponding position of the mounting bracket, and the mounting bracket is detachably installed in the mounting slot of the rack.

[0007] Based on the preferred embodiment of this technical solution, two sets of guide limiting plates and rotating rollers are provided. The two sets of guide limiting plates and rotating rollers are symmetrically distributed on the mounting frame, and the mounting frame has through slots at corresponding positions of the two sets of guide limiting plates. Both sets of guide limiting plates are slidably connected to the through slots of the mounting frame.

[0008] According to the preferred embodiment of this technical solution, the drive assembly includes a first hydraulic telescopic rod fixedly connected to the fixed frame, a circular gear rotatably connected to the mounting frame and the fixed frame, a rack slidably connected to the mounting frame, and a connecting lug fixedly connected between the telescopic end of the first hydraulic telescopic rod and the rack. A guide limiting plate is fixedly connected to the outside of the rack, and the rack meshes with the circular gear.

[0009] In the preferred embodiment of this technical solution, the mounting bracket has a groove at the corresponding position of the rack, and the rack is slidably connected to the groove of the mounting bracket.

[0010] Based on the preferred embodiment of this technical solution, the height adjustment component includes a support leg disposed on the side of the frame away from the mounting bracket, an adjusting inner rod fixedly connected to the same side of the frame as the support leg, a short plate fixedly connected between the support legs, a long plate fixedly connected between the support legs, a second hydraulic telescopic rod fixedly connected between the frame and the short plate, a first through hole opened on the support leg, a second through hole opened on the adjusting inner rod, a long bolt disposed on the first through hole and a nut threadedly connected to the long bolt, the adjusting inner rod being slidably connected to the support leg, and the long bolt being disposed on the second through hole.

[0011] Based on the preferred embodiment of this technical solution, several groups of second through holes are provided, and these groups of second through holes are distributed sequentially from top to bottom on the adjusting inner rod.

[0012] According to the preferred embodiment of this technical solution, the conveying assembly includes a motor fixedly connected to one side of the frame, a first transmission roller rotatably connected to one end of the frame, a second transmission roller rotatably connected to the other end of the frame, and a conveyor belt rotatably connected between the first transmission roller and the second transmission roller. The first transmission roller is fixedly connected to the output end of the motor.

[0013] The beneficial effects of this utility model are: 1. By driving the guide limit plates and rotating rollers on both sides to move closer or further apart, the spacing can be flexibly adjusted according to pistons of different diameters, thus adapting to pistons of different specifications. Furthermore, the rotating rollers, which are symmetrically distributed on the guide limit plates, not only center and guide the piston and ensure the stability of the piston conveying path, but also effectively reduce the frictional resistance during piston conveying. Together with the conveying components, this ensures normal piston conveying and avoids feeding jams or even stagnation, significantly improving the practicality of the device and enhancing its reliability in long-term use.

[0014] 2. When the frame height needs to be adjusted, the second hydraulic telescopic rod can push or pull the frame through its telescopic movement, thereby causing the adjusting inner rod to slide on the support leg, achieving convenient adjustment of the frame height. By opening a first through hole on the support leg and a second through hole on the adjusting inner rod, and passing a long bolt through both holes, and then securing it with a nut, the adjusting inner rod is firmly fixed to the support leg after the frame height is adjusted to the appropriate position. This prevents the adjusting inner rod from sliding on the support leg, ensuring the frame remains stably at the adjusted height. This avoids changes in frame height due to vibration during device operation, which could affect the normal delivery and guiding / limiting effect of the piston. The adjustment is not only convenient but also firmly fixed, effectively ensuring the stability of the device after height adjustment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a feeding device for syringe assembly according to the present invention; Figure 2 This is a schematic diagram of the mounting bolt structure of this utility model; Figure 3 This is a schematic diagram of the drive component structure of this utility model; Figure 4 This is a schematic diagram of the rotating roller structure of this utility model; Figure 5 This is a schematic diagram of the height adjustment component of this utility model; Figure 6 This is a schematic diagram of the conveying component structure of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Frame; 21. Mounting bracket; 22. Fixing bracket; 23. Mounting bolt; 24. Circular gear; 25. Rack; 26. First hydraulic telescopic rod; 27. Connecting lug; 28. Guide limit plate; 29. ​​Rotating roller; 31. Adjusting inner rod; 32. Support leg; 33. Short plate; 34. Long plate; 35. Second hydraulic telescopic rod; 36. First through hole; 37. Second through hole; 38. Long bolt; 39. Nut; 41. Motor; 42. First drive roller; 43. Second drive roller; 44. Conveyor belt. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-6 This utility model provides an embodiment of a feeding device for syringe assembly, including a frame 1, a height adjustment component disposed on one side of the frame 1, a mounting bracket 21 detachably mounted on the other side of the frame 1, a fixing bracket 22 fixedly connected to the mounting bracket 21, mounting bolts 23 disposed on the frame 1, a guide limiting plate 28 slidably connected to the mounting bracket 21, a rotating roller 29 rotatably connected to the guide limiting plate 28, a conveying component disposed on the frame 1, and a driving component disposed on the mounting bracket 21 and the fixing bracket 22. The mounting bolts 23 are threadedly connected to the mounting bracket 21, and the driving component is used to drive the guide limiting plates 28 and the rotating roller 29 on both sides to move synchronously closer or further apart, with the height... The adjustment assembly is used to adjust the height of the adjustment frame 1, and the conveying assembly is used to transport the piston. The drive assembly drives the guide limit plates 28 and rotating rollers 29 on both sides to move closer or further apart, which can easily adjust the spacing according to pistons of different diameters to adapt to pistons of different specifications. Furthermore, through several sets of rotating rollers 29 symmetrically distributed on the guide limit plates 28, the piston is centered and guided, and the piston conveying path is kept stable. At the same time, the frictional resistance during piston conveying is effectively reduced. Together with the conveying assembly, the piston is conveyed normally, avoiding feeding jams or even stoppages, which significantly improves the practicality of the device and enhances its reliability in long-term use.

[0019] Please see Figure 2A further solution based on this embodiment is as follows: The frame 1 has an installation slot at the corresponding position of the mounting frame 21. The mounting frame 21 is detachably installed in the installation slot of the frame 1. By opening the installation slot on the frame 1 at the position corresponding to the mounting frame 21, a precise positioning reference is provided for the installation of the mounting frame 21, so that the mounting frame 21 can quickly find the corresponding installation position with the frame 1 during installation, reducing the alignment time during installation and improving installation efficiency. At the same time, the installation slot can play a certain limiting role for the mounting frame 21, preventing the mounting frame 21 from shifting in the horizontal direction, further enhancing the stability of the connection between the mounting frame 21 and the frame 1, ensuring that the mounting frame 21 can always stay in the preset working position during the operation of the device, providing a guarantee for the stable operation of subsequent components such as the guide limit plate 28 and the rotating roller 29, and avoiding the deviation of the piston conveying path due to the offset of the mounting frame 21, which would affect the feeding effect.

[0020] Please see Figure 3 A further solution based on this embodiment is as follows: two sets of guide limiting plates 28 and rotating rollers 29 are provided. The two sets of guide limiting plates 28 and rotating rollers 29 are symmetrically distributed on the mounting frame 21, and the mounting frame 21 has through slots at corresponding positions of the two sets of guide limiting plates 28. Both sets of guide limiting plates 28 are slidably connected to the through slots of the mounting frame 21. By setting the guide limiting plates 28 and rotating rollers 29 into two sets and symmetrically distributed on the mounting frame 21, the piston can be guided and limited from both sides simultaneously, so that the piston always remains on the central conveying path of the device during the conveying process. This effectively avoids the piston from shifting or tilting due to uneven force on one side, ensuring the straightness and stability of the piston conveying. Through slots are made on the mounting bracket 21 at the positions corresponding to the two sets of guide limit plates 28, and the two sets of guide limit plates 28 are slidably connected in the through slots. The through slots provide precise track constraints for the sliding of the guide limit plates 28, ensuring that the guide limit plates 28 can move stably and smoothly towards or away from the through slots under the drive of the drive component, avoiding jamming or deviation of the guide limit plates 28 during movement, thereby ensuring the synchronicity and accuracy of the adjustment of the guide limit plates 28 on both sides, so as to better adapt to pistons of different diameters. At the same time, the structural design of the through slots can also play a certain protective role for the guide limit plates 28, reducing the wear of the guide limit plates 28 during sliding and extending their service life.

[0021] Please see Figure 3A further solution based on this embodiment is as follows: The drive assembly includes a first hydraulic telescopic rod 26 fixedly connected to the fixed frame 22, a circular gear 24 rotatably connected to the mounting frame 21 and the fixed frame 22, a rack 25 slidably connected to the mounting frame 21, and a connecting ear 27 fixedly connected between the telescopic end of the first hydraulic telescopic rod 26 and the rack 25. A guide limiting plate 28 is fixedly connected to the outside of the rack 25, and the rack 25 meshes with the circular gear 24. By fixing the first hydraulic telescopic rod 26 to the fixed frame 22, the fixed frame 22 provides a stable installation support for the first hydraulic telescopic rod 26, ensuring that the first hydraulic telescopic rod 26 can stably output driving force during operation and avoiding power output deviation due to unstable installation. The connecting ear 27 is fixedly connected between the telescopic end of the first hydraulic telescopic rod 26 and the rack 25, which can smoothly and reliably transmit the linear telescopic movement of the first hydraulic telescopic rod 26 to the rack 25, preventing loosening or falling off during power transmission and ensuring the effectiveness of power transmission. The rack 25 is slidably connected to the mounting bracket 21, which provides stable support and guidance for the sliding of the rack 25, ensuring that the rack 25 can slide smoothly along the preset direction. A circular gear 24 is rotatably connected to the mounting bracket 21 and the fixed bracket 22, and meshes with the rack 25. When the first hydraulic telescopic rod 26 drives one side of the rack 25 to slide, the rack 25 drives the circular gear 24 to rotate, and the circular gear 24 drives the other side of the rack 25 to slide in the opposite direction, thus achieving synchronous movement of the racks 25 on both sides. This, in turn, drives the guide limiting plate 28 and the rotating roller 29, which are fixedly connected to the outside of the rack 25, to move closer or further away synchronously. This gear and rack transmission method not only ensures the synchronicity and precision of the adjustment of the guide limiting plates 28 on both sides, making the distance between the two sides even and better adapting to pistons of different diameters, but also has high transmission efficiency, strong stability, and can work stably for a long time, reducing the probability of failure. Furthermore, it precisely adjusts the distance of the guide limiting plates 28 to meet the guide limiting requirements of pistons of different specifications.

[0022] Please see Figure 3A further solution based on this embodiment is as follows: The mounting bracket 21 has a groove at a corresponding position on the rack 25. The rack 25 is slidably connected to the groove on the mounting bracket 21. By creating a groove on the mounting bracket 21 at the position corresponding to the rack 25, the groove provides a dedicated track space for the rack 25 to slide, precisely constraining the sliding direction of the rack 25. This ensures that the rack 25 always moves along a preset straight line during sliding, preventing the rack 25 from deviating or wobbling, thereby ensuring that the rack 25 and the circular gear 24 always maintain a stable meshing state, preventing… The design of the slide groove reduces the friction area between the rack 25 and the mounting bracket 21 during sliding, thereby reducing sliding resistance and making the rack 25 slide more smoothly. This reduces wear on both the rack 25 and the mounting bracket 21, extending their service life. In addition, the slide groove also provides some protection for the rack 25, preventing external impurities from entering the connection between the rack 25 and the mounting bracket 21 and affecting the normal sliding of the rack 25, thus ensuring the long-term stable operation of the drive assembly.

[0023] Please see Figure 1 , Figure 5A further solution based on this embodiment is as follows: The height adjustment assembly includes a support leg 32 disposed on the side of the frame 1 away from the mounting bracket 21, an adjusting inner rod 31 fixedly connected to the side of the frame 1 and the support leg 32, a short plate 33 fixedly connected between the support legs 32, a long plate 34 fixedly connected between the support legs 32, a second hydraulic telescopic rod 35 fixedly connected between the frame 1 and the short plate 33, a first through hole 36 opened on the support leg 32, a second through hole 37 opened on the adjusting inner rod 31, a long bolt 38 disposed on the first through hole 36, and a nut 39 threadedly connected to the long bolt 38. The adjusting inner rod 31 is slidably connected to the support leg 32, and the long bolt 37 is threadedly connected to the long bolt 38. A bolt 38 is installed on the second through hole 37 and is positioned on the side of the frame 1 away from the mounting bracket 21 via a support leg 32, providing stable bottom support for the entire device and ensuring that the device can be placed stably on the ground, preventing it from tipping over during operation. An adjusting inner rod 31 is fixedly connected to the frame 1 on the same side as the support leg 32 and slidably connected to the support leg 32. The sliding fit between the adjusting inner rod 31 and the support leg 32 provides a structural basis for adjusting the height of the frame 1, allowing the frame 1 to change height as the adjusting inner rod 31 slides on the support leg 32. A short plate 33 is fixedly connected between the support legs 32, which not only strengthens the connection between the support legs 32... The connection stability ensures that the support leg 32 forms a whole, improving its load-bearing capacity and providing a stable installation platform for the second hydraulic telescopic rod 35. The second hydraulic telescopic rod 35 is fixedly connected between the frame 1 and the short plate 33. When the height of the frame 1 needs to be adjusted, the second hydraulic telescopic rod 35 can push or pull the frame 1 through its telescopic movement, thereby causing the adjusting inner rod 31 to slide on the support leg 32, achieving convenient height adjustment of the frame 1. The second hydraulic telescopic rod 35 has stable driving force, accurately controlling the lifting height of the frame 1, and the adjustment process is smooth, avoiding violent shaking during height adjustment of the frame 1. A first through hole is provided on the support leg 32. 36. A second through hole 37 is made on the adjusting inner rod 31, and a long bolt 38 is passed through the first through hole 36 and the second through hole 37. Then, a nut 39 is used for threaded connection and fixation. When the height of the frame 1 is adjusted to a suitable position, the adjusting inner rod 31 and the support leg 32 can be firmly fixed together by the tightening action of the long bolt 38 and the nut 39, preventing the adjusting inner rod 31 from sliding on the support leg 32. This ensures that the frame 1 can be stably maintained at the adjusted height, avoiding changes in the height of the frame 1 due to vibration during the operation of the device, which would affect the normal delivery and guiding limit effect of the piston. It is not only convenient to adjust, but also firmly fixed, which can effectively ensure the stability of the device after the height is adjusted.

[0024] Please see Figure 5A further solution based on this embodiment is as follows: Several sets of second through holes 37 are provided, and these sets of second through holes 37 are distributed sequentially from top to bottom on the adjusting inner rod 31. By sequentially distributing several sets of second through holes 37 on the adjusting inner rod 31 from top to bottom, when the height of the frame 1 needs to be adjusted, the second through holes 37 at different positions on the adjusting inner rod 31 can be aligned with the first through holes 36 on the support leg 32 according to the actual required height, and then fixed by long bolts 38 and nuts 39. This design of multiple sets of second through holes 37 greatly increases the range and accuracy of the frame 1 height adjustment, enabling the device to adjust according to different heights. The ejector assembly line and different operating scenarios require precise adjustment to the most suitable height, avoiding the situation where the limited number of second through holes 37 results in limited height adjustment options and fails to meet actual usage needs. At the same time, the distribution of multiple sets of second through holes 37 also provides the possibility of fine adjustment of the height of the frame 1. Operators can select adjacent second through holes 37 to achieve small adjustments to the height of the frame 1, so that the height of the device can be more accurately adapted to actual working needs, further improving the versatility and practicality of the device, ensuring that the device can maintain the best working condition in different operating environments, and guaranteeing the stability and accuracy of piston delivery.

[0025] Please see Figure 6A further solution based on this embodiment is as follows: The conveying assembly includes a motor 41 fixedly connected to one side of the frame 1, a first transmission roller 42 rotatably connected to one end of the frame 1, a second transmission roller 43 rotatably connected to the other end of the frame 1, and a conveyor belt 44 rotatably connected between the first transmission roller 42 and the second transmission roller 43. The first transmission roller 42 is fixedly connected to the output end of the motor 41. By fixing the motor 41 to one side of the frame 1, the frame 1 provides a stable mounting support for the motor 41, ensuring stable operation of the motor 41 during operation and avoiding excessive vibration of the motor 41 due to unstable installation, which would affect the power output. The first transmission roller 42 is rotatably connected to one end of the frame 1 and fixedly connected to the output end of the motor 41. When the motor 41 is working, it can directly drive the first transmission roller 42 to rotate, efficiently transmitting the power of the motor 41 to the first transmission roller 42. The power transmission path is short, reducing power loss. The second transmission roller 43 is rotatably connected to the other end of the frame 1, cooperating with the first transmission roller 42 to provide stable support for the conveyor belt 44. Tension is maintained to ensure that the conveyor belt 44 maintains a flat transmission state, preventing slackness or deviation. The conveyor belt 44 is connected between the first drive roller 42 and the second drive roller 43. When the first drive roller 42 rotates under the drive of the motor 41, it drives the conveyor belt 44 to stably transmit along the tracks of the first drive roller 42 and the second drive roller 43, thereby achieving stable transport of the piston placed on the conveyor belt 44. The transmission method of the conveyor belt 44 ensures that the piston maintains a smooth movement during transport, preventing bumps or tilting. Furthermore, the large contact area between the conveyor belt 44 and the piston allows for even weight distribution, preventing slippage or damage during transport. Simultaneously, the motor 41 has a controllable speed, allowing adjustment of the motor's speed to control the transmission speed of the conveyor belt 44, and thus the piston's transport speed. This ensures that the conveying assembly matches the rhythm of other processes in the syringe assembly production line, guaranteeing smooth assembly and improving production efficiency.

[0026] Working principle: First, the height of the frame 1 is adapted through the height adjustment component: Activating the second hydraulic telescopic rod 35 causes its telescopic movement to drive the fixedly connected frame 1 and adjusting inner rod 31 to slide along the support leg 32. After the frame 1 is adjusted to the height suitable for the syringe assembly line, the long bolt 38 is passed through the first through hole 36 of the support leg 32 and the corresponding second through hole 37 on the adjusting inner rod 31, and then tightened with the nut 39 to keep the frame 1 stably at the target height. At the same time, the cooperation of the support leg 32 with the long plate 34 and the short plate 33 provides stable support for the entire device. Next, the guide limit adjustment before piston delivery is performed: Activating the first hydraulic telescopic rod 26 in the drive component causes its telescopic end to drive one side rack 25 to slide along the slide groove of the mounting frame 21 through the connecting ear 27. Since the rack 25 meshes with the circular gear 24 rotatably connected to the mounting frame 21 and the fixed frame 22, the sliding of one side rack 25 will drive the circular gear 24 to rotate, thereby driving the other side rack 25 to rotate. The side rack 25 slides in the opposite direction, and the two side racks 25 respectively drive the fixedly connected guide limiting plates 28 to move closer or further away from the through groove of the mounting frame 21 synchronously until the distance between the two sets of symmetrically distributed guide limiting plates 28 matches the diameter of the piston to be conveyed. At this time, the rotating rollers 29 on the guide limiting plates 28 are also adjusted into position. Finally, the conveying assembly is started to start the piston transportation: the motor 41 drives the fixedly connected first transmission roller 42 to rotate. The first transmission roller 42 drives the second transmission roller 43 to rotate synchronously through the conveyor belt 44, placing the piston to be conveyed on the conveyor belt 44. The conveyor belt 44 drives the piston to move towards the assembly station. During the movement, the rotating rollers 29 on the two side guide limiting plates 28 play a central guiding role for the piston. At the same time, the rolling characteristics of the rotating rollers 29 reduce the frictional resistance between the piston and the guide limiting plates 28, ensuring that the piston is stably conveyed along the preset path, avoiding feeding jams or stagnation, and finally efficiently completing the directional conveying operation of pistons of different specifications.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding device for syringe assembly, comprising a frame (1), characterized in that: It also includes a height adjustment assembly on one side of the frame (1), a mounting bracket (21) detachably mounted on the other side of the frame (1), a fixing bracket (22) fixedly connected to the mounting bracket (21), a mounting bolt (23) on the frame (1), a guide limit plate (28) slidably connected to the mounting bracket (21), a rotating roller (29) rotatably connected to the guide limit plate (28), a conveying assembly on the frame (1), and a drive assembly on the mounting bracket (21) and the fixing bracket (22). The mounting bolt (23) is threadedly connected to the mounting bracket (21). The drive assembly is used to drive the guide limit plates (28) and the rotating roller (29) on both sides to move closer or further away synchronously. The height adjustment assembly is used to adjust the height of the frame (1). The conveying assembly is used to transport the piston.

2. The feeding device for syringe assembly according to claim 1, characterized in that: The frame (1) has a mounting slot at the corresponding position of the mounting bracket (21), and the mounting bracket (21) is detachably installed in the mounting slot of the frame (1).

3. The feeding device for syringe assembly according to claim 1, characterized in that: Two sets of guide limit plates (28) and rotating rollers (29) are provided. The two sets of guide limit plates (28) and rotating rollers (29) are symmetrically distributed on the mounting frame (21). The mounting frame (21) has through slots at the corresponding positions of the two sets of guide limit plates (28). The two sets of guide limit plates (28) are slidably connected to the through slots of the mounting frame (21).

4. The feeding device for syringe assembly according to claim 1, characterized in that: The drive assembly includes a first hydraulic telescopic rod (26) fixedly connected to the fixed frame (22), a circular gear (24) rotatably connected to the mounting frame (21) and the fixed frame (22), a rack (25) slidably connected to the mounting frame (21), and a connecting lug (27) fixedly connected between the telescopic end of the first hydraulic telescopic rod (26) and the rack (25). A guide limit plate (28) is fixedly connected to the outside of the rack (25), and the rack (25) meshes with the circular gear (24).

5. A feeding device for syringe assembly according to claim 4, characterized in that: The mounting bracket (21) has a groove at the corresponding position of the rack (25), and the rack (25) is slidably connected to the groove of the mounting bracket (21).

6. The feeding device for syringe assembly according to claim 1, characterized in that: The height adjustment assembly includes a support leg (32) located on the side of the frame (1) away from the mounting bracket (21), an adjusting inner rod (31) fixedly connected to the side of the frame (1) and the support leg (32), a short plate (33) fixedly connected between the support leg (32), a long plate (34) fixedly connected between the support leg (32), a second hydraulic telescopic rod (35) fixedly connected between the frame (1) and the short plate (33), a first through hole (36) opened on the support leg (32), a second through hole (37) opened on the adjusting inner rod (31), a long bolt (38) set on the first through hole (36) and a nut (39) threadedly connected to the long bolt (38). The adjusting inner rod (31) is slidably connected to the support leg (32), and the long bolt (38) is set on the second through hole (37).

7. A feeding device for syringe assembly according to claim 6, characterized in that: The second through hole (37) is provided in several groups, and the several groups of second through holes (37) are distributed from top to bottom on the adjusting inner rod (31).

8. The feeding device for syringe assembly according to claim 1, characterized in that: The conveying assembly includes a motor (41) fixedly connected to one side of the frame (1), a first drive roller (42) rotatably connected to one end of the frame (1), a second drive roller (43) rotatably connected to the other end of the frame (1), and a conveyor belt (44) rotatably connected between the first drive roller (42) and the second drive roller (43). The first drive roller (42) is fixedly connected to the output end of the motor (41).

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