A medical flow control system drive turntable and medical perfusion pump

Abstract

The utility model provides a kind of transmission turntable of medical flow control system and medical perfusion pump, it is related to medical instrument technical field, the technical problem that the assembly of split type transmission turntable is more difficult in prior art is solved.The device includes turntable main body, pin shaft and gyro wheel assembly, wherein, the turntable main body is integrated molding structure, the circumferential side wall of the turntable main body is provided with the annular recessed groove recessed inward, the upper end and the lower end of the turntable main body are respectively correspondingly provided with at least a group of coaxial first mounting hole and second mounting hole;The number of the pin shaft and the gyro wheel assembly is at least one, the gyro wheel assembly is located in the annular recessed groove, the pin shaft is sequentially provided with the first mounting hole, the gyro wheel assembly and the second mounting hole.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a transmission turntable and a medical infusion pump for a medical flow control system. Background Technology

[0002] Medical infusion pumps, often called peristaltic pumps, are a common fluid delivery device in the medical field. One of their core components is a drive disc with multiple rollers. During operation, a motor drives the drive disc to rotate, and the rollers periodically squeeze a section of elastic fluid tubing, thereby propelling the fluid within the tubing precisely and achieving pumping.

[0003] In existing technologies, transmission turntables typically employ a split structure, consisting of a main turntable and a separate cover plate. Rollers are mounted between the main turntable and the cover plate via their axles, with both ends of the axle fixed in pre-drilled mounting holes on the main turntable and the cover plate, respectively. This split structure has some inherent drawbacks. First, the assembly process is complex, requiring the individual alignment and installation of multiple independent parts, including the main turntable, cover plate, rollers, and shafts. This involves numerous positioning steps, making assembly difficult, time-consuming, and labor-intensive. Second, because the roller shafts are usually thin, and the corresponding mounting holes are also small, careful manual alignment of the holes on the main turntable and cover plate is crucial during assembly. Inaccurate positioning can easily lead to concentricity deviations, causing the shafts to become misaligned after installation. This misalignment affects the smoothness of roller rotation and may cause the squeezed liquid tubes to deviate from their pre-set center track. This not only accelerates frictional wear and shortens the service life of the liquid tubes but, in severe cases, may even render the entire turntable assembly unusable due to substandard assembly precision. Furthermore, traditional rollers are typically mounted directly or via simple sleeves on fixed shafts, resulting in sliding friction between them. When the turntable rotates at high speed, this sliding friction generates significant frictional resistance and operating noise, impacting the user experience and lifespan of the equipment. Utility Model Content

[0004] The purpose of this invention is to provide a transmission turntable for a medical flow control system and a medical infusion pump, to solve the technical problem of difficult assembly of the split transmission turntable in the prior art. The various technical effects of the preferred solutions among the many technical solutions provided by this invention are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a transmission turntable for a medical flow control system, comprising a turntable body, a pin shaft and a roller assembly, wherein the turntable body is an integrally formed structure, and an inwardly recessed annular groove is provided on the circumferential sidewall of the turntable body, and at least one set of coaxial first mounting holes and second mounting holes are respectively provided on the upper and lower ends of the turntable body. The number of both the pin and the roller assembly is at least one, the roller assembly is located in the annular recessed groove, and the pin passes through the first mounting hole, the roller assembly and the second mounting hole in sequence.

[0006] Optionally, the turntable body includes a first disc, a second disc, and a connecting post. The first disc and the second disc are arranged in parallel. The connecting post is located between the first disc and the second disc, and the middle parts of the first disc and the second disc are respectively fixedly connected to the two ends of the connecting post. The lower end surface of the first disc, the circumferential sidewall of the connecting post, and the upper end surface of the second disc form the annular recessed groove.

[0007] Optionally, the first disk body is provided with at least one first mounting hole, the first mounting hole penetrates the first disk body, the first mounting hole is a countersunk hole, and the upper end of the pin is provided with a positioning head, the positioning head is connected to the countersunk hole.

[0008] Optionally, the second disk body is provided with at least one second mounting hole, the height of the second mounting hole is less than the thickness of the second disk body, the first mounting hole is a threaded hole, the lower end of the pin is provided with a threaded head, and the threaded head is threadedly connected to the threaded hole.

[0009] Optionally, a motor shaft mounting hole is provided in the middle region of the turntable body. The motor shaft mounting hole is located inside the connecting column and penetrates through the first turntable body.

[0010] Optionally, a threaded limiting hole is provided on the side wall of the connecting column, the center lines of the threaded limiting hole and the connecting hole are perpendicular, and the threaded limiting hole is connected to the connecting hole.

[0011] Optionally, the lower end surface of the second disc is provided with an inwardly recessed arc-shaped groove and a U-shaped groove.

[0012] Optionally, the roller assembly includes a roller and a bearing, wherein the number of bearings is at least one, the bearing is mounted inside the roller, and the pin passes through the inner ring of the bearing.

[0013] This utility model provides a medical infusion pump, including a motor, a housing, a peristaltic tubing, and a transmission turntable for a medical flow control system. The outer casing of the motor is connected to the inner wall of the housing, and the output shaft of the motor passes through the outer wall of the housing and is connected to the transmission turntable of the medical flow control system. The peristaltic tubing is wound around the transmission turntable of the medical flow control system.

[0014] This utility model provides a transmission turntable for a medical flow control system. By adopting a one-piece molded double-disc turntable body, it replaces the separate structure of the main turntable and cover plate in the prior art, fundamentally reducing the number of parts and assembly steps. During assembly, there is no need for complex alignment between the discs, significantly reducing assembly difficulty and saving costs. Secondly, because the turntable body is a one-piece molded structure, the first and second mounting holes can be coaxially machined in a single clamping, ensuring extremely high concentricity and guaranteeing the perpendicularity of the pin shaft after installation. This prevents the roller assembly from skewing, thereby improving product reliability and reducing the defect rate, solving the technical problem of difficult assembly of separate transmission turntables in the prior art.

[0015] The preferred technical solution of this utility model can also produce at least the following technical effects: This application transforms the sliding friction between the roller and the pin into rolling friction by setting a bearing between them, which greatly reduces the rotational resistance and makes the roller rotate more smoothly and evenly. This significantly reduces the noise during equipment operation and reduces component wear. The high-precision one-piece structure of this application, combined with the roller assembly with bearings, solves the two major technical problems of assembly accuracy and operating noise, and improves the overall performance.

[0016] This application avoids the deviations or misalignment issues that occur during secondary assembly, and prevents misalignment or non-concentricity problems. The rollers and pins are easy to install without needing to be specially aligned. Furthermore, the rollers have a large diameter, allowing them to be placed at the mounting holes for approximate alignment. Pushing the pins in automatically aligns the rollers and installs them in place, greatly reducing installation difficulty and time, and saving labor costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is an exploded view of the transmission turntable of a medical flow control system provided in this embodiment of the present invention; Figure 2 This is a cross-sectional view of the main body of the transmission turntable of a medical flow control system provided in this embodiment of the present invention. Figure 3 This is a bottom view of the second disc of the transmission turntable of a medical flow control system provided in this embodiment of the present invention; Figure 4 This is an exploded view of a roller assembly of a medical flow control system provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the structure of the medical infusion pump provided in this embodiment of the utility model.

[0019] In the figure: 1. Turntable body; 11. Annular recessed groove; 12. First disc body; 121. First mounting hole; 13. Second disc body; 131. Second mounting hole; 132. Arc groove; 133. U-shaped groove; 14. Connecting post; 141. Threaded limiting hole; 15. Connecting hole; 16. Keyway. 2. Pin; 21. Positioning head; 22. Threaded head; 3. Roller assembly; 31. Roller; 32. Bearing; 4. Electric motor; 5. Chassis; 6. Peristaltic hose. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not 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 a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] This utility model provides a transmission turntable for a medical flow control system, including a turntable body 1, a pin shaft 2 and a roller assembly 3. The turntable body 1 is an integrally formed structure. An inwardly recessed annular groove 11 is provided on the circumferential side wall of the turntable body 1. At least one set of coaxial first mounting holes 121 and second mounting holes 131 are respectively provided on the upper and lower ends of the turntable body 1. The number of pins 2 and roller assemblies 3 is at least one, and the number of pins 2 and roller assemblies 3 is the same. The roller assembly 3 is located in the annular recessed groove 11. The pins 2 pass through the first mounting hole 121, the roller assembly 3, and the second mounting hole 131 in sequence. This utility model provides a transmission turntable for a medical flow control system. By adopting an integrally molded double-disc turntable body 1, it replaces the separate structure of the main turntable and cover plate in the prior art, fundamentally reducing the number of parts and assembly steps. During assembly, there is no need for complex alignment between the discs, significantly reducing assembly difficulty and saving costs. Secondly, since the turntable body 1 is an integrally molded structure, the first mounting hole 121 and the second mounting hole 131 can be coaxially machined in one clamping, thus ensuring extremely high concentricity, ensuring the perpendicularity of the pins 2 after installation, avoiding skewness of the roller assembly 3, thereby improving product reliability and reducing the defect rate, and solving the technical problem of difficult assembly of separate transmission turntables in the prior art.

[0024] As an optional implementation, the turntable body 1 is integrally formed. The turntable body 1 includes a first disc 12, a second disc 13, and a connecting post 14. The first disc 12 and the second disc 13 are arranged in parallel. Both the first disc 12 and the second disc 13 are circular disc structures with the same size. The connecting post 14 is located between the first disc 12 and the second disc 13, and the middle parts of the first disc 12 and the second disc 13 are respectively fixedly connected to the two ends of the connecting post 14. The diameter of the connecting post 14 is smaller than the diameter of the first disc 12. The lower end face of the first disc 12, the circumferential sidewall of the connecting post 14, and the upper end face of the second disc 13 form an annular recessed groove 11, which can be used to accommodate the roller assembly 3.

[0025] As an optional implementation, the first disc 12 is provided with at least one first mounting hole 121, which penetrates the first disc 12. The first mounting hole 121 is a countersunk hole, a smooth through hole. A positioning head 21 is provided at the upper end of the pin 2, which is connected to the countersunk hole to ensure that the pin 2 passes smoothly and that the pin 2 and the countersunk hole provide a positioning reference. The second disc 13 is provided with at least one second mounting hole 131, the height of which is less than the thickness of the second disc 13. The first mounting hole 121 is a threaded hole, and a threaded head 22 is provided at the lower end of the pin 2, which is threadedly connected to the threaded hole to ensure a secure locking structure between the pin 2 and the threaded hole. The first mounting hole 121 and the second mounting hole 131 in each set are strictly coaxial. This coaxiality can also be ensured by an integral molding process, that is, in the same clamping, the machining tool can continuously machine from the first disc 12 to the second disc 13, thereby ensuring that the central axes of the two mounting holes are highly coincident.

[0026] As an optional implementation, a motor shaft mounting hole is provided in the central region of the turntable body 1. The motor shaft mounting hole is located within the connecting post 14 and penetrates through the first disc body 12. The motor shaft mounting hole includes a connecting hole 15 and a keyway 16, which are connected. Both the connecting hole 15 and the keyway 16 are located within the connecting post 14 and penetrate through the first disc body 12. The output shaft of the motor 4 is connected to the connecting hole 15, and the output shaft of the motor 4 is further connected to the keyway 16 via a key to restrict rotation.

[0027] As an optional implementation, a threaded limiting hole 141 is provided on the side wall of the connecting column 14. The center lines of the threaded limiting hole 141 and the connecting hole 15 are perpendicular, and the threaded limiting hole 141 is connected to the connecting hole 15. The bolt is threadedly connected to the threaded limiting hole 141, and the end of the bolt can abut against the side wall of the output shaft of the motor 4 for further restriction.

[0028] As an optional implementation, the lower end surface of the second disc 13 is provided with an inwardly recessed arc-shaped groove 132 and a U-shaped groove 133.

[0029] As an optional implementation, the roller assembly 3 includes a roller 31 and a bearing 32. There is at least one bearing 32, which is mounted inside the roller 31. The pin 2 passes through the inner ring of the bearing 32. To provide stable and smooth rotational support for the roller 31, two bearings 32 are used, respectively pressed into both ends of the central through-hole of the roller 31. These two bearings 32 transform the relative motion between the inner ring of the roller 31 and the pin 2 from sliding friction to rolling friction, thereby significantly reducing the coefficient of friction and rotational resistance.

[0030] The assembly process of this application is as follows: First, take a roller 31 and use a special press to press two bearings 32 into its central hole from the upper and lower ends of the roller 31 until the outer ring end face of the bearing 32 is flush with or slightly recessed into the end face of the roller 31, thereby prefabricating a complete roller assembly 3. Then, place the roller assembly 3 in the annular recessed groove 11 of the turntable body 1, so that its central hole is roughly aligned with a set of coaxial first mounting holes 121 and second mounting holes 131. Take a pin 2 and insert one end of the threaded head 22 from the outside of the first disc body 12 into the first mounting hole 121, and then pass through the inner ring of the upper bearing 32 and the inner ring of the lower bearing 32 in sequence. Since the coaxiality of the first mounting hole 121 and the second mounting hole 131 has been guaranteed, the pin 2 can smoothly pass through the entire roller assembly 3. When the threaded head 22 reaches the entrance of the second mounting hole 131, use a tool to screw the pin 2 in and tighten it. After tightening, the locating head 21 of the pin 2 abuts against the first mounting hole 121, and its threaded head 22 is tightly locked with the second disc 13. In this way, the pin 2 is firmly fixed between the first disc 12 and the second disc 13, forming a stationary and precisely perpendicular shaft to the disc surface. Repeating the above steps allows all four roller assemblies 3 to be installed onto the turntable body 1. Because the one-piece molding structure ensures the accuracy of the installation reference, this assembly process eliminates the need for complex alignment operations, thus improving assembly efficiency and first-pass yield.

[0031] This invention provides a medical infusion pump, comprising a motor 4, a housing 5, a peristaltic tubing 6, and a transmission turntable for a medical flow control system. The housing of the motor 4 is connected to the inner wall of the housing 5, and the output shaft of the motor 4 passes through the outer wall of the housing 5 and is connected to the transmission turntable of the medical flow control system. The peristaltic tubing 6 is wound around the transmission turntable of the medical flow control system. During operation, the assembled transmission turntable is mounted on the output shaft of the motor 4 through the motor shaft mounting hole. When the motor 4 starts rotating, the output shaft of the motor 4 drives the entire turntable body 1 to rotate around its central axis, and the four pins 2 and four roller assemblies 3 mounted on the turntable body 1 also rotate together. During the revolution, the outer cylindrical surface of the rollers 31 will sequentially contact and squeeze the peristaltic tubing 6 surrounding the pump head. Since the rollers 31 are rotatably mounted on the fixed pins 2 through two bearings 32, when the peristaltic tubing 6 exerts a force on the rollers 31, the rollers 31 can rotate freely around their respective pins 2 with little resistance. This rolling contact replaces the sliding friction in traditional structures, making the extrusion process smoother and reducing operating noise. Simultaneously, the integrated high-precision structure of the turntable body 1 ensures the precise perpendicularity and parallelism of all pins 2, thereby ensuring that the rotation axes of all rollers 31 maintain a precise parallel relationship with the rotation axis of the turntable body 1. This allows the rollers to stably run on the preset track during revolution, accurately extruding the peristaltic hose 6, helping to avoid hose misalignment and abnormal wear, and extending the service life of the peristaltic hose 6.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A transmission turntable for a medical flow control system, characterized in that, It includes a turntable body (1), a pin shaft (2), and a roller assembly (3), wherein, The turntable body (1) is an integrally formed structure. The circumferential sidewall of the turntable body (1) is provided with an inwardly recessed annular groove (11). At least one set of coaxial first mounting holes (121) and second mounting holes (131) are respectively provided on the upper and lower ends of the turntable body (1). The number of both the pin (2) and the roller assembly (3) is at least one. The roller assembly (3) is located in the annular recess (11). The pin (2) passes through the first mounting hole (121), the roller assembly (3) and the second mounting hole (131) in sequence.

2. The transmission turntable of a medical flow control system according to claim 1, characterized in that, The turntable body (1) includes a first disc (12), a second disc (13), and a connecting post (14). The first disc (12) and the second disc (13) are arranged in parallel. The connecting post (14) is located between the first disc (12) and the second disc (13), and the middle parts of the first disc (12) and the second disc (13) are respectively fixedly connected to the two ends of the connecting post (14). The lower end face of the first disc (12), the circumferential sidewall of the connecting post (14), and the upper end face of the second disc (13) form the annular recessed groove (11).

3. The transmission turntable of a medical flow control system according to claim 2, characterized in that, The first disk body (12) is provided with at least one first mounting hole (121), the first mounting hole (121) penetrates the first disk body (12), the first mounting hole (121) is a countersunk hole, and the upper end of the pin (2) is provided with a positioning head (21), the positioning head (21) is connected to the countersunk hole.

4. The transmission turntable of a medical flow control system according to claim 2, characterized in that, The second disk (13) is provided with at least one second mounting hole (131), the height of the second mounting hole (131) is less than the thickness of the second disk (13), the first mounting hole (121) is a threaded hole, and the lower end of the pin (2) is provided with a threaded head (22), which is threadedly connected to the threaded hole.

5. The transmission turntable of a medical flow control system according to claim 2, characterized in that, The turntable body (1) has a motor shaft mounting hole in the middle area. The motor shaft mounting hole is located inside the connecting column (14) and penetrates the first disc body (12).

6. The transmission turntable of a medical flow control system according to claim 5, characterized in that, The connecting column (14) has a threaded limiting hole (141) on its side wall. The motor shaft mounting hole includes a connecting hole (15). The center lines of the threaded limiting hole (141) and the connecting hole (15) are perpendicular to each other. The threaded limiting hole (141) and the connecting hole (15) are connected.

7. The transmission turntable of a medical flow control system according to claim 2, characterized in that, The lower end surface of the second disc (13) is provided with an inwardly recessed arc groove (132) and a U-shaped groove (133).

8. The transmission turntable of a medical flow control system according to claim 1, characterized in that, The roller assembly (3) includes a roller (31) and a bearing (32), wherein there is at least one bearing (32), the bearing (32) is assembled inside the roller (31), and the pin (2) passes through the inner ring of the bearing (32).

9. A medical infusion pump, characterized in that, The device includes a motor (4), a housing (5), a peristaltic hose (6), and a drive turntable of the medical flow control system according to any one of claims 1-8. The housing of the motor (4) is connected to the inner wall of the housing (5), the output shaft of the motor (4) passes through the outer wall of the housing (5) and is connected to the drive turntable of the medical flow control system, and the peristaltic hose (6) is wound around the drive turntable of the medical flow control system.

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