Peristaltic pump with transmission device

Abstract

The invention relates to the technical field of peristaltic pumps, in particular to a peristaltic pump with a transmission device, which comprises a direct current motor, a gear reducer is mounted on one side of the direct current motor, a bottom cover is fixedly mounted on one side of the gear reducer, and two limiting rings are fixedly connected in the bottom cover in a symmetrical structure. A movable frame is arranged on one side of the limiting ring in a penetrating and sliding fit mode, a transmission mechanism is arranged in the movable frame in a rotating connection mode, vibration mechanisms are arranged on the two sides of the transmission mechanism in a sliding contact mode, and a contact ring is fixedly connected to one end of the movable frame. Therefore, the peristaltic pump is wide in flow range, particularly capable of achieving extremely low water flow, high in precision, convenient to install, good in structural consistency and stability and easy to maintain, the number of parts is reduced, composition rings are reduced, the assembly size chain is optimized, procedures are simplified and the like, and therefore production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of peristaltic pump technology, and more particularly to a peristaltic pump with a transmission device. Background Technology

[0002] In the field of fluid transport, peristaltic pumps, with their core advantages of fluid contact only with the pump pipe and no contamination, have become key equipment in industries with stringent requirements for fluid purity, such as biopharmaceuticals, food and beverage, and fine chemicals. Currently, most mainstream peristaltic pumps on the market use a planetary gear system composed of a central wheel, planetary gears, and a planetary gear set, integrated inside the pump body. The assembly precision of this structure is highly dependent on manual operation, leading not only to extended installation time and low production efficiency, but also to the risk of component misalignment and jamming due to assembly errors, severely affecting equipment operational stability. Furthermore, the excessive number of transmission components increases maintenance difficulty and production costs.

[0003] Existing peristaltic pumps also face significant performance limitations: on the one hand, due to the inherent characteristics of DC motors, their speed is difficult to reduce to below 2000 rpm, making it impossible to provide a basis for low-speed output; on the other hand, the reduction ratio adjustment range of the planetary gear system is narrow, making it difficult to achieve large-scale reduction. These two factors together result in a limited flow adjustment range for the final product, especially failing to meet the demand for precise delivery of extremely low flow rates in industrial production and scientific research. Therefore, the industry urgently needs a peristaltic pump technology with stable transmission, precise output, and a more optimized structure to make up for the existing shortcomings. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a peristaltic pump with a transmission device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a peristaltic pump with a transmission device, including a DC motor, a gear reducer installed on one side of the DC motor, a bottom cover fixedly installed on the gear reducer, two limiting rings fixedly connected in a symmetrical structure inside the bottom cover, a movable frame slidably fitted through one side of the limiting rings, a transmission mechanism rotatably connected inside the movable frame, a vibration mechanism slidably contacting both sides of the transmission mechanism, a contact ring fixedly connected to one end of the movable frame, a tripod installed inside the bottom cover, a flexible hose installed on the outside of the tripod, multiple rollers installed on the tripod, and a top cover installed on one side of the bottom cover.

[0006] Preferably, the bottom cover is fixedly connected to the gear reducer by two bottom cover screws, and the bottom cover is fixedly connected to two hose connectors, one end of which is fixedly connected to a hose.

[0007] Preferably, the tripod is slidably fitted to the output shaft end of the gear reducer in the middle, and multiple U-shaped frames are fixedly connected to the tripod. Multiple support rollers are rotatably connected to the U-shaped frames. The support rollers are in contact with the flexible hose. Transmission gear rings are fixedly connected to both sides of the tripod, and multiple mounting holes are provided at both ends of the tripod.

[0008] Preferably, the inner wall of the roller is rotatably connected with a steel needle, the two ends of the steel needle are movably inserted into the mounting holes, and the outer wall of the roller is movably in contact with the hose.

[0009] Preferably, the upper cover is fixedly connected to the lower cover by a plurality of upper cover screws.

[0010] Preferably, a rotating shaft is rotatably connected to one side of the limiting ring, and a gear shaft is fixedly connected to the rotating shaft. The gear shaft meshes with a transmission gear ring for transmission. Multiple guide rods are slidably connected through the limiting ring. One end of each guide rod is fixedly connected to a contact ring, and the contact ring is in movable contact with the hose.

[0011] Preferably, tension springs are fixedly connected to both ends of one side of the movable frame, and the other end of the tension springs is fixedly connected to a limiting ring. Contact grooves and sliding grooves are provided on the inner walls of both sides of one side of the movable frame.

[0012] Preferably, the transmission mechanism includes a transmission shaft, which is rotatably connected to the movable frame. A transmission wheel is fixedly connected to one end of the transmission shaft, and the transmission wheel is slidably engaged with a gear shaft for transmission. A contact rod is fixedly connected to the transmission shaft.

[0013] Preferably, the vibration mechanism includes a swing plate, one end of which is slidably in contact with a contact rod, and the other end of which is fixedly connected to a striking ball. The striking ball is movably in contact with the inner wall of the contact groove. A rotating shaft is fixedly connected to the end of the swing plate near the striking ball, and the other end of the rotating shaft is rotatably connected to a movable frame. A reset gear is fixedly connected to the outer wall of the rotating shaft. A reset rack is meshed with one side of the reset gear, and a slider is fixedly connected to one side of the reset rack. The slider is slidably engaged with the inner wall of the groove. Two springs are fixedly connected to the upper and lower sides of the two sliders, and the other ends of the springs are fixedly connected to the inner wall of the groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention eliminates the central wheel, planetary gears, and planetary carrier of the planetary gear train in the reduction section of the transmission components. Instead, it integrates the gear reducer into the DC motor section. The reduction shaft directly outputs to the tripod drive. By utilizing the high speed ratio of the gear reducer to output low speed and high torque, and with a wide range of reduction ratio adjustment, the peristaltic pump has a wide flow range, especially capable of achieving extremely low water flow rates. It is also highly accurate, easy to install, has good structural consistency and stability, and is simple to maintain. By reducing the number of parts and components, the assembly dimension chain is optimized, and the process is simplified, thereby reducing production costs.

[0016] By setting limit rings and support rollers, the hose can be laterally limited and circumferentially supported. In the use of peristaltic pumps, this not only effectively ensures the position and shape of the hose in the peristaltic pump, but also improves the working stability of the equipment, extends the hose life, reduces wear, reduces energy consumption, and ensures the uniformity of fluid delivery.

[0017] By incorporating a vibration mechanism, while the tripod drives the rollers to rotate and compress the hose for material conveying, the transmission ring drives the transmission mechanism. This mechanism causes the striking ball on one side of the swing plate to continuously strike the movable frame. Through the contact ring connected to the movable frame, the vibration is transmitted to the contact hose. In peristaltic pump applications, this significantly improves the uniformity, stability, and efficiency of fluid delivery. It offers undeniable advantages, especially in applications handling high-viscosity fluids, particulate matter, or requiring high-precision flow control. Vibration helps reduce hose wear, improves fluid flowability, reduces energy consumption, and prevents jamming or blockage, thereby enhancing the reliability and service life of the entire pump system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a peristaltic pump with a transmission device according to the present invention;

[0019] Figure 2 This is a partial cross-sectional view of the overall structure of a peristaltic pump with a transmission device according to the present invention.

[0020] Figure 3 This is a partial structural schematic diagram of a peristaltic pump with a transmission device according to the present invention;

[0021] Figure 4 This is a partial cross-sectional view of the bottom cover and other structures of a peristaltic pump with a transmission device according to the present invention.

[0022] Figure 5 This is a schematic diagram showing the structure of a peristaltic pump with a transmission device, including a tripod, according to the present invention.

[0023] Figure 6This is a schematic diagram of the limiting ring and other structures of a peristaltic pump with a transmission device according to the present invention;

[0024] Figure 7 This is a schematic diagram of the movable frame and transmission mechanism of a peristaltic pump with a transmission device according to the present invention;

[0025] Figure 8 This is a schematic diagram of the vibration mechanism structure of a peristaltic pump with a transmission device according to the present invention.

[0026] The following components are marked in the diagram: 1. DC motor; 2. Gear reducer; 3. Bottom cover; 4. Limit ring; 5. Movable frame; 6. Transmission mechanism; 7. Vibration mechanism; 8. Contact ring; 9. Tripod; 10. Hose; 11. Roller; 12. Top cover; 301. Bottom cover screw; 302. Hose connector; 901. U-shaped frame; 902. Support roller; 903. Transmission gear ring; 904. Mounting hole; 1101. Steel needle; 1201. Top cover screw; 401. Rotating shaft; 402. Gear shaft; 403. Guide rod; 501. Tension spring; 502. Contact groove; 503. Slide groove; 601. Transmission shaft; 602. Transmission wheel; 603. Contact rod; 701. Swing plate; 702. Strike ball; 703. Rotating shaft; 704. Return gear; 705. Return rack; 706. Slider; 707. Spring. Detailed Implementation

[0027] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0028] Example: Figures 1-8 The peristaltic pump with a transmission device shown includes a DC motor 1, a gear reducer 2 mounted on one side of the DC motor 1, a bottom cover 3 fixedly mounted on the gear reducer 2, two limiting rings 4 fixedly connected in a symmetrical structure inside the bottom cover 3, a movable frame 5 slidably fitted through one side of the limiting rings 4, a transmission mechanism 6 rotatably connected inside the movable frame 5, a vibration mechanism 7 slidably contacting both sides of the transmission mechanism 6, a contact ring 8 fixedly connected to one end of the movable frame 5, a tripod 9 inside the bottom cover 3, a flexible hose 10 on the outside of the tripod 9, multiple rollers 11 on the tripod 9, and a top cover 12 on one side of the bottom cover 3.

[0029] The DC motor 1 is a 12V brushless DC motor, and the gear reducer 2 adopts a two-stage spur gear reduction structure. The reduction ratio can be customized and adjusted within the range of 1:3.5-1:1036. The output speed range is 10-300rpm, and the output torque is ≥5. To meet different flow requirements. When the peristaltic pump is in use, the output ratio of the DC motor 1 is adjusted by the gear reducer 2 to drive the tripod 9 to rotate. At this time, the tripod 9 will drive the roller 11 to squeeze the hose 10 to achieve water output.

[0030] When the tripod 9 rotates, it drives the transmission mechanism 6, which in turn drives the vibration mechanism 7. The vibration mechanism 7 transmits the vibration to the contact hose 10 through the movable frame 5 and the connected contact ring 8. The vibration is beneficial for the hose 10 to recover and for conveying materials.

[0031] like Figure 4 As shown, the bottom cover 3 is fixedly connected to the gear reducer 2 by two bottom cover screws 301. The bottom cover 3 is also fixedly connected to two hose connectors 302, one end of which is fixedly connected to the hose 10.

[0032] Two hose connectors 302 are used for material input and output respectively, and the inner wall of the connector is provided with an anti-backflow chamfer (angle 30°) to reduce material residue and backflow.

[0033] like Figure 5 As shown, the tripod 9 is slidably fitted to the output shaft end of the gear reducer 2 in the middle. Multiple U-shaped frames 901 are fixedly connected to the tripod 9. Multiple support rollers 902 are rotatably connected to the U-shaped frames 901. The support rollers 902 are in contact with the hose 10. Transmission gear rings 903 are fixedly connected to both sides of the tripod 9. Multiple mounting holes 904 are opened at both ends of the tripod 9.

[0034] The support roller 902 has a structure that is thinner in the middle and thicker at both ends. This design ensures that when the support roller 902 supports the hose 10 inside the peristaltic pump, the central portion of the hose 10 experiences less pressure, while the thicker portions at both ends experience greater pressure. This structure, by ensuring that the central portion of the hose 10 experiences less pressure and the ends experience greater pressure, helps maintain the natural shape of the hose 10, reduces irregular deformation under pressure, and improves flow stability (flow error ≤ ±2%).

[0035] This invention eliminates the central wheel, planetary gears, and planetary carrier of the planetary gear train in the reduction section of the transmission components. The reduction gearbox 2 is integrated into the DC motor 1, and the reduction shaft directly outputs to the tripod 9 via the shaft. By utilizing the high speed ratio of the gearbox 2 to output low speed and high torque, the gearbox 2 has a wide reduction ratio adjustment range, resulting in a wide flow range for the peristaltic pump. In particular, it can achieve extremely low water flow rates with high precision, convenient installation, good structural consistency and stability, and simple maintenance. By reducing the number of parts and the number of component links, the assembly dimension chain is optimized, the process is simplified, and thus the production cost is reduced.

[0036] like Figure 5 As shown, a steel needle 1101 is rotatably connected to the inner wall of the roller 11. The two ends of the steel needle 1101 are movably inserted into the mounting hole 904, and the outer wall of the roller 11 is movably in contact with the hose 10.

[0037] Further explanation: In this invention, the hose 10 and rollers are as follows: The material of the hose 10 can be selected from silicone (food and pharmaceutical grade), fluororubber (corrosion resistant), or polyurethane (wear resistant) depending on the application scenario (inner diameter 2-6mm, wall thickness 1-3mm), with an elongation at break ≥300% and fatigue resistance ≥10 cycles. 6 The roller uses 45# steel as its core, with a 3mm thick polyurethane wear-resistant layer wrapped around the outer wall. Two stainless steel needles are rotatably connected to the inner wall, with both ends of the needles movably inserted into the mounting holes. The fit clearance is 0.01-0.03mm, and the roller rotation resistance is ≤0.5N, ensuring smooth and unobstructed compression of the hose.

[0038] The steel needle 1101 limits the roller 11, allowing it to be stably mounted on the tripod 9. The outer wall of the roller 11 is wrapped with a polyurethane wear-resistant layer, which compresses and conveys the material to the hose 10.

[0039] Further explanation: The tripod 9 used in this invention is made of 6061 aluminum alloy, precision machined by CNC, and uses plastic material. Considering the use of this material by competitors, the weight is ≤300g. The center hole diameter is precisely matched with the spline of the output shaft of the gear reducer 2, with a coaxiality error ≤0.02mm. Three U-shaped frames (120° included angle) are evenly distributed around the circumference of the tripod 9. The clearance between the inner wall of the U-shaped frame and the support roller shaft is 0.01-0.02mm. The support roller 902 is made of POM engineering plastic, with an outer diameter of 12mm and a length of 25mm. It has a stepped structure that is thinner in the middle (10mm in diameter) and thicker at both ends. This design ensures uniform deformation of the hose 10 under pressure, controlling the flow error within ±2%. Transmission gear rings are fixedly connected to both sides of the tripod 9. The gear rings are made of 40Cr, have 48 teeth, a module of 1.5, and a tooth tip circle diameter of 75mm. When meshing with the gear shaft, the transmission efficiency is ≥95%. The tripod 9 has 6 mounting holes evenly distributed at both ends, with a hole diameter of 4.2mm, for mounting the steel pins of the roller 11. The hole position tolerance is ±0.01mm to ensure smooth rotation of the roller 11.

[0040] like Figure 4 As shown, the upper cover 12 is fixedly connected to the bottom cover 3 by a plurality of upper cover screws 1201.

[0041] The top cover screw 1201 facilitates the installation and disassembly of the top cover 12 and the bottom cover 3, and makes equipment maintenance and hose 10 replacement convenient.

[0042] Further explanation: Both the bottom cover 3 and the top cover 12 used in this invention are injection molded from ABS engineering plastic, with a matte finish or made of transparent PC material and polished. The impact resistance is ≥15kJ / m², and the temperature range is -20℃ to 80℃. The bottom cover 3 is fixed to the gear reducer 2 by two M5×16 internal hexagonal screws. The screws are made of 304 stainless steel, and the preload torque is controlled at 8-10 Nm. Ensure a secure and tight connection. The bottom cover integrates two hose connectors on both sides, made of 304 stainless steel (or PP material). The inner diameter is adapted to the hose specifications (6mm, 8mm, 10mm optional). The inner wall features a 30° anti-backflow chamfer to reduce material residue to ≤0.1ml. The connectors and hoses are interference-fitted to prevent leakage. The top cover is connected to the bottom cover via three M4×12 Phillips head screws. The screws are evenly distributed for easy disassembly and maintenance, and can absorb operational vibrations to reduce noise.

[0043] like Figure 6 As shown, a rotating shaft 401 is rotatably connected to one side of the limiting ring 4, and a gear shaft 402 is fixedly connected to the rotating shaft 401. The gear shaft 402 meshes with the transmission gear ring 903 for transmission. Multiple guide rods 403 are slidably connected through the limiting ring 4. One end of the guide rod 403 is fixedly connected to the contact ring 8, and the contact ring 8 is in movable contact with the hose 10.

[0044] Two limiting rings 4 can laterally limit the hose 10 inside the peristaltic pump, effectively preventing displacement, deformation, wear, and aging of the hose 10, and improving the accuracy and stability of flow control. The limiting ring design also simplifies hose 10 replacement and maintenance, extends the service life of the hose 10, reduces equipment failure rate and maintenance costs, and enhances the reliability and efficiency of the entire pump system. When the tripod 9 rotates, it drives the connected transmission gear ring 903 to rotate. At this time, the transmission gear ring 903 drives the gear shaft 402 to rotate, which in turn drives the transmission wheel 602 to rotate. The transmission wheel 602 then drives the transmission shaft 601 to rotate, which in turn drives the contact rod 603 to rotate.

[0045] The drive shaft 601 is made of 40Cr steel, with a diameter of 5mm and a length of 40mm. It is rotatably connected to the movable frame 5 via a miniature bearing (model 625ZZ), with a rotational resistance ≤0.3N. One end of the drive shaft 601 is connected to a drive wheel (module 1.5, 12 teeth) via a flat key, which slides and meshes with the gear shaft. The meshing surface is coated with lithium-based grease (model GB / T7324-2010) to reduce friction loss. A contact rod (made of stainless steel, with a diameter of 2mm and a length of 15mm) is fixedly connected to the middle of the drive shaft 601. The contact rod is welded perpendicularly to the drive shaft 601, with a perpendicularity error ≤0.02mm, and is used to drive the vibration mechanism.

[0046] like Figure 7 As shown, tension springs 501 are fixedly connected to both ends of one side of the movable frame 5, and the other end of the tension springs 501 is fixedly connected to the limiting ring 4. Contact grooves 502 and sliding grooves 503 are provided on the inner walls of both sides of one end of the movable frame 5.

[0047] Further explanation: In this invention, the limiting ring 4 is made of ABS material, has a ring structure, an outer diameter of 60mm, and an inner diameter of 45mm. It is fixed to the inner wall of the bottom cover 3 by three M3 screws. The two limiting rings 4 are symmetrically arranged, and the spacing is adjusted according to the length of the hose 10 to achieve lateral limiting of the hose 10 and prevent the hose 10 from deviating by more than 0.5mm. One side of the limiting ring 4 is rotatably connected to a rotating shaft (diameter 6mm, material 40Cr) via a bearing. A gear shaft (module 1.5, number of teeth 12) is fixed on the rotating shaft and meshes with the transmission gear ring for transmission. Four guide rods (diameter 3mm, material 304 stainless steel) are evenly distributed on the circumference of the limiting ring 4. The fit clearance between the guide rod and the limiting ring 4 is 0.02-0.04mm. One end of the guide rod is welded to the contact ring. The contact ring has a ring structure, and its inner diameter matches the outer diameter of the hose 10 (gap 0.1-0.2mm). It is made of nylon 66 and has a smooth, burr-free surface to avoid damaging the hose 10. The movable frame has a U-shaped structure and is made of ABS engineering plastic. The inner walls on both sides have contact grooves (5mm deep, 8mm wide) and slide grooves 503 (20mm long, 6mm wide). Two tension springs 501 (made of 65Mn, wire diameter 1.2mm, outer diameter 8mm, free length 30mm, working tension 5-8N) are fixedly connected to both ends of one side of the movable frame. The other end of the tension spring 501 is connected to the limit ring 4 hook to ensure that the contact ring is always in flexible contact with the hose 10. The contact pressure is controlled at 1-2N, which ensures vibration transmission without damaging the hose 10.

[0048] The tension spring 501 effectively transmits vibration by maintaining stable contact between the contact ring 8 and the hose 10, improving vibration transmission efficiency, reducing friction between the hose 10 and the contact ring 8, and increasing system stability and durability. It can also accommodate hose 10 deformation, thereby improving equipment durability and reducing failures and maintenance costs.

[0049] like Figure 7 As shown, the transmission mechanism 6 includes a transmission shaft 601, which is rotatably connected to the movable frame 5. A transmission wheel 602 is fixedly connected to one end of the transmission shaft 601. The transmission wheel 602 is slidably meshed with the gear shaft 402 for transmission. A contact rod 603 is fixedly connected to the transmission shaft 601.

[0050] When the contact rod 603 rotates, it will contact and squeeze the swing plate 701, causing the swing plate 701 to swing around the rotation shaft 703. At this time, the striking ball 702 at the other end of the swing plate 701 will quickly contact the inner wall of the contact groove 502, thereby generating vibration.

[0051] The swing plate 701 is made of spring steel (65Mn), with a thickness of 1.5mm, a length of 30mm, and a width of 8mm. One end slides in contact with the contact rod 603, and the contact end is ground into an arc shape (radius 2mm) to avoid scratching the contact rod 603. The other end is fixedly connected to the striking ball (made of polyurethane, 6mm in diameter, Shore A hardness 75A), which makes movable contact with the inner wall of the contact groove. The striking frequency is proportional to the motor speed (to further explain, the striking frequency is 3Hz at 60rpm and 15Hz at 300rpm). The end of the swing plate 701 near the striking ball is rotatably connected to the movable frame via a rotating shaft (3mm in diameter, made of 40Cr). The outer wall of the rotating shaft 601 is fixedly connected to a reset gear (module 1, 10 teeth), which meshes with the reset rack (module 1, length 15mm) for transmission. One side of the reset rack is integrally formed with the slider (made of ABS, size 6×8×10mm). The slider slides in contact with the inner wall of the groove 503 with a clearance of 0.03-0.05mm. The two sliders are fixedly connected to springs 707 (made of 65Mn, wire diameter 0.8mm, outer diameter 5mm, free length 12mm, elastic coefficient 2N / mm) on the upper and lower sides respectively. The other end of the spring 707 is fixed to the inner wall of the groove 503 to ensure that the swing plate 701 quickly resets after being hit, with a reset time ≤0.1s.

[0052] like Figure 8 As shown, the vibration mechanism 7 includes a swing plate 701. One end of the swing plate 701 is slidably in contact with the contact rod 603, and the other end of the swing plate 701 is fixedly connected to a striking ball 702. The striking ball 702 is movably in contact with the inner wall of the contact groove 502. A rotating shaft 703 is fixedly connected to one end of the swing plate 701 near the striking ball 702. The other end of the rotating shaft 703 is rotatably connected to the movable frame 5. A reset gear 704 is fixedly connected to the outer wall of the rotating shaft 703. A reset rack 705 is meshed and driven on one side of the reset gear 704. A slider 706 is fixedly connected to one side of the reset rack 705. The slider 706 is slidably engaged with the inner wall of the groove 503. Springs 707 are fixedly connected to the upper and lower sides of the two sliders 706 respectively. The other end of the spring 707 is fixedly connected to the inner wall of the groove 503.

[0053] Spring 707 enables the swing plate 701 to automatically reset. When the rotating shaft 703 rotates, it drives the connected reset gear 704 to rotate. At this time, the reset gear 704 drives the slider 706 connected to the reset rack 705 to move. When the swing plate 701 is not in contact with the contact rod 603, under the action of spring 707, it drives the reset rack 705 connected to the slider 706 to move, thereby driving the reset gear 704 to rotate, so that the reset gear 704 drives the swing plate 701 connected to the rotating shaft 703 to automatically reset.

[0054] Working principle: When using the peristaltic pump, ensure that the top cover 12 is securely installed, the hose 10 is undamaged and untwisted, and the hose connector 302 is tightly connected to the conveying pipeline. Adjust the reduction ratio according to the actual medium and the required flow rate. After adjusting the output ratio of the DC motor 1 through the gear reducer 2, the tripod 9 will rotate. At this time, the tripod 9 will drive the roller 11 to squeeze the hose 10 to achieve material conveying. At the same time, the support roller 902 on the tripod 9 can support the hose 10.

[0055] To further clarify, the DC motor 1 used in this invention needs to be a 12V brushless DC motor 1, preferably model BLDC-57BYG (or BL-2430DI-2245), with a rated power of 12V*0.2A-2.4W, a rated speed of 4200rpm, and a no-load current ≤0.8A. Compared with brushed motors, the brushless design has advantages such as low operating noise ≤45dB, long service life (continuous operation ≥5000 hours), and long maintenance cycle, making it suitable for the long-term stable operation requirements of industrial production and laboratories. The motor output shaft is made of 45# steel, with a surface heat treatment, and has a diameter of 8mm. It is riveted to the input shaft of the gear reducer, with a transmission torque loss ≤3%.

[0056] Further explanation: The gear reducer 2 in this invention adopts a two-stage spur gear reduction structure. The housing is made of powder metallurgy, precision machined after die casting, and weighs less than 80g, combining lightweight and structural strength. The internal gears are made of 20CrMnTi alloy steel (or powder metallurgy), carburized and quenched (hardness HRC58-62), with tooth surface accuracy reaching GB / T10095.2-20086 grade, and meshing clearance controlled within 0.02-0.05mm, effectively reducing operating noise and energy loss. The reduction ratio can be customized within the range of 1:10-1:50 by changing the intermediate gear with different numbers of teeth. The output speed range is 60-300rpm, and the output torque is ≥5. It meets the wide flow rate adjustment requirements of 0.1~5L / min. The output shaft of the gear reducer 2 and the tripod 9 adopt a spline fit, with flat shafts at both ends (spline specification 6×23×26) for connection. The fit clearance is ≤0.03mm to ensure accurate and slip-free power transmission.

[0057] When the tripod 9 rotates, it will drive the connected transmission gear ring 903 to rotate. At this time, the transmission gear ring 903 will drive the gear shaft 402 to rotate, so that the gear shaft 402 can drive the transmission wheel 602 to rotate. At this time, the transmission wheel 602 will drive the transmission shaft 601 to rotate, so that the transmission shaft 601 can drive the contact rod 603 to rotate.

[0058] When the contact rod 603 rotates, it will contact and squeeze the swing plate 701, causing the swing plate 701 to swing around the rotation shaft 703. At this time, the striking ball 702 at the other end of the swing plate 701 will quickly contact the inner wall of the contact groove 502, realizing the vibration generated by the strike. Then, the vibration is transmitted to the contact hose 10 through the movable frame 5 and the connected contact ring 8.

[0059] When the rotating shaft 703 rotates, it will drive the connected reset gear 704 to rotate. At this time, the reset gear 704 will drive the slider 706 connected to the reset rack 705 to move. When the swing plate 701 is not in contact with the contact rod 603, under the action of the spring 707, it will drive the reset rack 705 connected to the slider 706 to move, thereby driving the reset gear 704 to rotate, so that the reset gear 704 drives the swing plate 701 connected to the rotating shaft 703 to automatically reset.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A peristaltic pump with a transmission device, comprising a DC motor (1), characterized in that: A gear reducer (2) is installed on one side of the DC motor (1), and a bottom cover (3) is fixedly installed on one side of the gear reducer (2). Two limiting rings (4) are fixedly connected in a symmetrical structure inside the bottom cover (3). A movable frame (5) is slidably connected to one side of the limiting ring (4), and a contact ring (8) is fixedly connected to one end of the movable frame (5).

2. A peristaltic pump with a transmission device according to claim 1, characterized in that: The bottom cover (3) is fixedly connected to the gear reducer (2) by two bottom cover screws (301). The bottom cover (3) is fixedly connected to two hose connectors (302), one end of which is fixedly connected to the hose (10).

3. A peristaltic pump with a transmission device according to claim 1, characterized in that: The tripod (9) is slidably fitted to the output shaft of the gear reducer (2) in the middle. Multiple U-shaped frames (901) are fixedly connected to the tripod (9). Multiple support rollers (902) are rotatably connected to the U-shaped frames (901). The support rollers (902) are in contact with the hose (10). Transmission gear rings (903) are fixedly connected to both sides of the tripod (9). Multiple mounting holes (904) are opened at both ends of the tripod (9).

4. A peristaltic pump with a transmission device according to claim 1, characterized in that: The inner wall of the roller (11) is rotatably connected with a steel needle (1101), and both ends of the steel needle (1101) are movably inserted into the mounting hole (904). The outer wall of the roller (11) is movably in contact with the hose (10).

5. A peristaltic pump with a transmission device according to claim 1, characterized in that: The movable frame (5) is rotatably connected to a transmission mechanism (6), and a vibration mechanism (7) is slidably contacted on both sides of the transmission mechanism (6). A tripod (9) is provided inside the bottom cover (3), a flexible hose (10) is provided on the outside of the tripod (9), a plurality of rollers (11) are provided on the tripod (9), and an upper cover (12) is provided on one side of the bottom cover (3). The upper cover (12) is fixedly connected to the bottom cover (3) by a plurality of upper cover screws (1201).

6. A peristaltic pump with a transmission device according to claim 3, characterized in that: A rotating shaft (401) is rotatably connected to one side of the limiting ring (4), and a gear shaft (402) is fixedly connected to the rotating shaft (401). The gear shaft (402) meshes with the transmission gear ring (903) for transmission. Multiple guide rods (403) are slidably connected through the limiting ring (4). One end of the guide rod (403) is fixedly connected to the contact ring (8), and the contact ring (8) is in movable contact with the hose (10).

7. A peristaltic pump with a transmission device according to claim 6, characterized in that: The movable frame (5) is fixedly connected to two ends on one side with tension springs (501), and the other end of the tension springs (501) is fixedly connected to the limiting ring (4). The inner walls on both sides of one end of the movable frame (5) are provided with contact grooves (502) and sliding grooves (503).

8. A peristaltic pump with a transmission device according to claim 7, characterized in that: The transmission mechanism (6) includes a transmission shaft (601), which is rotatably connected to the movable frame (5). A transmission wheel (602) is fixedly connected to one end of the transmission shaft (601), and the transmission wheel (602) is slidably meshed with the gear shaft (402) for transmission. A contact rod (603) is fixedly connected to the transmission shaft (601).

9. A peristaltic pump with a transmission device according to claim 8, characterized in that: The vibration mechanism (7) includes a swing plate (701), one end of which is slidably in contact with a contact rod (603), and the other end of which is fixedly connected to a striking ball (702). The striking ball (702) is movably in contact with the inner wall of a contact groove (502). A rotating shaft (703) is fixedly connected to one end of the swing plate (701) near the striking ball (702), and the other end of the rotating shaft (703) is rotatably connected to a movable frame (5). A reset gear (704) is fixedly connected to the outer wall of the rotating shaft (703). A reset rack (705) is meshed and driven on one side of the reset gear (704). A slider (706) is fixedly connected to one side of the reset rack (705). The slider (706) is slidably engaged with the inner wall of the slide groove (503). Springs (707) are fixedly connected to the upper and lower sides of the two sliders (706), respectively. The other end of the spring (707) is fixedly connected to the inner wall of the slide groove (503).

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