A peristaltic pump with stable performance and high cost performance

Abstract

This utility model discloses a peristaltic pump with stable performance and high cost-effectiveness, including a motor, a first planetary gear reduction group, a pump tube, a synchronization disc assembly, a rear shell, and a front shell. The motor is a brushed motor, which achieves two-stage reduction through the first and second planetary gear reduction groups, increasing the reduction ratio to improve torque and ensure smooth operation at low speeds. A Hall sensor is installed on the rear shell, and a radially magnetized induction ring is fitted on the outside of the reduction frame. A circuit board is fixed at the end of the motor, and the Hall sensor is electrically connected to the circuit board. By detecting the rotational speed signal of the induction ring, the motor is controlled to maintain a constant speed, avoiding the impact of load changes on flow accuracy. The synchronization disc assembly uses a metal synchronization bracket to prevent the pump tube from being squeezed and deformed. Both ends of the pump tube extend out of the front shell and are connected to adapters with internal threads for easy replacement of different types of adapters. This utility model has low cost, stable performance, and high flow accuracy, and is suitable for fields requiring precise fluid transmission.

Description

Technical Field

[0001] This utility model relates to the field of fluid transfer equipment technology, specifically to a peristaltic pump with stable performance and high cost-effectiveness. Background Technology

[0002] A peristaltic pump is a device that delivers fluid by squeezing a tubing with rollers or a rotor, and is widely used in medical, chemical, and food industries. Currently, peristaltic pumps often use stepper motors or brushless motors as drive sources to ensure flow accuracy and operational stability; however, these motors are expensive, hindering low-cost applications. Brushed motors are inexpensive, but their speed fluctuates under load, leading to decreased flow accuracy. Furthermore, brushed motors experience reduced torque at low speeds, potentially causing operational instability. Additionally, the synchronization brackets of traditional peristaltic pumps are prone to deformation due to tubing compression after prolonged use, affecting pump performance stability. Replacing the tubing connectors is also often inconvenient, limiting their applicability. Therefore, a peristaltic pump that is low-cost, stable in performance, and can maintain high flow accuracy is needed. Utility Model Content

[0003] This invention overcomes the shortcomings of existing technologies and provides a peristaltic pump with stable performance and high cost-effectiveness. Through two-stage planetary gear reduction and closed-loop speed control, it solves the problems of brushed motor speed fluctuation and low torque, while improving overall stability and applicability.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a peristaltic pump with stable performance and high cost-effectiveness, comprising a motor, a first planetary gear reduction group, a pump tube, a synchronous disk assembly, a rear shell and a front shell. The rear shell and the front shell are fixed together to form a shell-like structure. The motor is fixed to one end of the outer side of the rear shell. The first planetary gear reduction group is located inside the rear shell. The synchronous disk assembly and the pump tube are located inside the front shell, and the pump tube is located outside the synchronous disk assembly. The motor is poweredly connected to the first planetary gear reduction group and the synchronous disk assembly, driving the synchronous disk assembly to squeeze the pump tube to work. The motor is a brushed motor. One end of the first planetary gear reduction group is connected to the power output end of the motor. The other end of the first planetary gear reduction group is fixedly set on one side of the reduction frame. A second planetary gear reduction group is set on the other side of the reduction frame. The synchronous disk assembly is poweredly connected to the second planetary gear reduction group. A Hall sensor is installed on the rear shell, and an induction magnetic ring is fitted on the outside of the reduction gear. The induction magnetic ring rotates synchronously with the reduction gear and is radially magnetized. A circuit board is fixedly installed at the end of the motor. The circuit board is soldered to the motor pins. The Hall sensor is electrically connected to the circuit board and transmits the collected rotation speed signal of the induction magnetic ring to the circuit board. The circuit board controls the motor to maintain a constant speed.

[0005] Furthermore, a first driving gear is fixedly installed on the power output shaft of the motor, and the first planetary gear reduction group consists of three circumferentially distributed driven gears that mesh with the first driving gear. The first driven gear is movably mounted on the first fixed shaft of the reduction frame, which is axially fixed, and drives the reduction frame to rotate at a reduced speed.

[0006] Furthermore, the structure of the synchronization disc assembly includes: a synchronization bracket, a second fixed shaft, and a rotor. The synchronization bracket is located in the cavity between the pump tube and the front housing. One end of each of the three second fixed shafts is axially fixed to the synchronization bracket. Each second fixed shaft is fitted with a rotor. The rotor rolls and squeezes the pump tube. The end of the second fixed shaft is connected to a second planetary gear reduction group.

[0007] Furthermore, the second driving gear of the second planetary gear reducer is fixedly mounted on the side center of the reducer frame, and the three second driven gears of the second planetary gear reducer are respectively movably mounted on the three second fixed shafts. The second driving gear meshes with the three second driven gears. The reducer frame, after the first-stage reduction, rotates, causing the second driving gear to rotate with the same angular velocity. The second driving gear then drives the synchronous bracket and the second fixed shaft to rotate in the second stage through the second driven gear.

[0008] Furthermore, a retaining ring is provided on the second fixed shaft between the second driven gear and the rotor, the retaining ring separating the speed reduction transmission mechanism from the pump tube cavity.

[0009] Furthermore, there are two Hall sensors, which are arranged on the rear cover at a certain circumferential distance apart. Both Hall sensors are electrically connected to the circuit board and are used to detect the direction of rotation of the motor.

[0010] Furthermore, both ends of the pump pipe extend to the outside of the front housing, and each end is connected to an adapter. The adapter is fixed to the front housing. The adapter is provided with an internal thread, which can be threadedly connected to a connector provided with an external thread, making it convenient to replace different models of connectors.

[0011] Compared with existing technologies, this invention offers the following advantages: It employs a brushed motor combined with closed-loop speed control. The speed is detected by a Hall sensor and a magnetic ring, and the motor voltage is adjusted by a circuit board to maintain a constant speed, preventing load variations from affecting flow accuracy and reducing costs. A two-stage planetary gear reduction system increases the reduction ratio, improving output torque and solving the problem of reduced torque at low speeds in brushed motors, ensuring smooth pump head operation. The synchronous bracket in this invention is made of metal, improving wear resistance and deformation resistance, and extending service life. The adapter uses a threaded connection structure, facilitating quick replacement of connectors of different sizes or models, enhancing applicability and maintenance convenience. This invention features a compact overall structure, low cost, and stable performance, making it suitable for various fluid transfer scenarios. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is an exploded structural diagram of the present invention.

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 3 This is a schematic diagram of the connection structure between the two-stage deceleration system and the pump pipe in this utility model.

[0016] Figure 4 This is a schematic diagram of the connection structure between the synchronous disk assembly and the two-stage deceleration system in this utility model.

[0017] In the diagram: 1 is the motor, 2 is the first planetary gear reduction group, 3 is the pump pipe, 4 is the rear housing, 5 is the front housing, 6 is the reduction frame, 7 is the second planetary gear reduction group, 8 is the Hall sensor, 9 is the sensing magnetic ring, 10 is the circuit board, 11 is the synchronization bracket, 12 is the second fixed shaft, 13 is the rotor, 14 is the retaining ring, 15 is the adapter, and 16 is the connector. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments.

[0019] like Figures 1-4As shown, this utility model discloses a peristaltic pump with stable performance and high cost-effectiveness, comprising a motor 1, a first planetary gear reduction set 2, a pump pipe 3, a synchronization disc assembly, a rear shell 4, and a front shell 5. The rear shell 4 and the front shell 5 are connected by snap-fit ​​mechanisms to form a sealed shell structure. The motor 1 is a brushed motor, fixed to the outside of the rear shell 4, with its power output shaft extending into the rear shell 4 and connected to the first planetary gear reduction set 2. The first planetary gear reduction set 2 includes a first driving gear and three circumferentially distributed first driven gears. The first driving gear is fixed on the output shaft of the motor 1, and the first driven gears are movably mounted on the first fixed shaft of the reduction frame 6, achieving single-stage reduction and driving the reduction frame 6 to rotate.

[0020] A second planetary gear reduction group 7 is installed on the other side of the reduction frame 6. The second driving gear is fixed at the center of the side of the reduction frame 6 and meshes with three second driven gears. The synchronization disc assembly includes a synchronization bracket 11, three second fixed shafts 12, and a rotor 13. The synchronization bracket 11 is located in the cavity between the pump tube 3 and the front housing 5. The second fixed shafts 12 are axially fixed on the synchronization bracket 11, and each second fixed shaft 12 is fitted with a rotor 13, which is used to roll and squeeze the pump tube 3. The second driven gears are movably mounted on the second fixed shafts 12 and drive the synchronization bracket 11 to perform two-stage speed reduction rotation through the second planetary gear reduction group 7, thereby increasing the torque. A retaining ring 14 is provided on the second fixed shaft 12 to isolate the speed reduction transmission mechanism and the pump tube 3 cavity to prevent contamination.

[0021] Two Hall sensors 8 are mounted on the rear housing 4, spaced at a certain circumferential distance, for detecting steering. A magnetic ring 9 is fitted onto the outer side of the reduction gear 6; the magnetic ring 9 is radially magnetized and rotates synchronously with the reduction gear 6. The Hall sensors 8 detect the change in the magnetic poles of the magnetic ring 9 and transmit the signal to the circuit board 10. The circuit board 10 is fixed to the end of the motor 1 and soldered to the motor 1 pins. Based on the signal from the Hall sensors 8, it adjusts the voltage of the motor 1 to achieve closed-loop speed control, maintaining a constant motor speed.

[0022] The pump pipe 3 extends out of the front housing 5 at both ends and connects to the adapter 15. The adapter 15 is provided with internal threads and can be threaded to the connector 16 with external threads, which makes it easy to replace different models of connector 16 to meet different fluid transmission needs.

[0023] In operation, the motor 1 drives the first planetary gear reducer 2, which, after two-stage reduction via the reducer 6 and the second planetary gear reducer 7, drives the synchronous support 11 and the rotor 13 to rotate. The rotor 13 compresses the pump pipe 3 to generate fluid transmission. The Hall sensor 8 and the circuit board 10 monitor and adjust the rotation speed in real time to ensure flow accuracy. The metal material of the synchronous support 11 prevents deformation, and the two-stage reduction ensures low-speed torque. The overall structure is simple, low-cost, and has stable performance.

[0024] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A peristaltic pump with stable performance and high cost-effectiveness, comprising a motor (1), a first planetary gear reduction group (2), a pump tube (3), a synchronous disc assembly, a rear shell (4), and a front shell (5), wherein the rear shell (4) and the front shell (5) are fixed together to form a shell-like structure, the motor (1) is fixed at one end of the outer side of the rear shell (4), the first planetary gear reduction group (2) is located inside the rear shell (4), the synchronous disc assembly and the pump tube (3) are located inside the front shell (5), and the pump tube (3) is located outside the synchronous disc assembly, the motor (1) is poweredly connected to the synchronous disc assembly through the first planetary gear reduction group (2), driving the synchronous disc assembly to squeeze the pump tube (3) to work, characterized in that: The motor (1) is a brushed motor. One end of the first planetary gear reduction group (2) is connected to the power output end of the motor (1). The other end of the first planetary gear reduction group (2) is fixedly installed on one side of the reduction frame (6). A second planetary gear reduction group (7) is installed on the other side of the reduction frame (6). The synchronous disk assembly is poweredly connected to the second planetary gear reduction group (7). A Hall sensor (8) is provided on the rear shell (4). A magnetic ring (9) is fitted on the outside of the speed reducer (6). The magnetic ring (9) rotates synchronously with the speed reducer (6). The magnetic ring (9) is radially magnetized. A circuit board (10) is fixedly provided at the end of the motor (1). The circuit board (10) is soldered to the pins of the motor (1). The Hall sensor (8) is electrically connected to the circuit board (10) and transmits the collected speed signal of the magnetic ring (9) to the circuit board (10). The circuit board (10) controls the motor (1) to maintain a constant speed.

2. The peristaltic pump with stable performance and high cost-effectiveness according to claim 1, characterized in that: A first driving gear is fixedly installed on the power output shaft of the motor (1). The first planetary gear reduction group (2) consists of three circumferentially distributed driven gears that mesh with the first driving gear. The first driven gear is movably installed on the first fixed shaft of the reduction frame (6) and drives the reduction frame (6) to decelerate and rotate.

3. The peristaltic pump with stable performance and high cost-effectiveness according to claim 2, characterized in that: The structure of the synchronization disk assembly includes: a synchronization bracket (11), a second fixed shaft (12) and a rotor (13). The synchronization bracket (11) is located in the cavity between the pump pipe (3) and the front shell (5). One end of each of the three second fixed shafts (12) is axially fixed on the synchronization bracket (11). Each second fixed shaft (12) is fitted with a rotor (13). The rotor (13) rolls and squeezes the pump pipe (3). The end of the second fixed shaft (12) is connected to the second planetary gear reduction group (7).

4. The peristaltic pump with stable performance and high cost-effectiveness according to claim 3, characterized in that: The second driving gear of the second planetary gear reduction group (7) is fixedly installed at the center of the side of the reduction frame (6). The three second driven gears of the second planetary gear reduction group (7) are respectively movably installed on the three second fixed shafts (12). The second driving gear meshes with the three second driven gears. The reduction frame (6) after the first-stage reduction rotates, driving the second driving gear to rotate with the same angular velocity. The second driving gear then drives the synchronous bracket (11) and the second fixed shaft (12) to perform the second-stage reduction rotation through the second driven gear.

5. A peristaltic pump with stable performance and high cost-effectiveness according to claim 4, characterized in that: A retaining ring (14) is provided on the second fixed shaft (12) between the second driven gear and the rotor (13), and the retaining ring (14) separates the speed reduction transmission mechanism from the pump tube (3) cavity.

6. The peristaltic pump with stable performance and high cost-effectiveness according to claim 1, characterized in that: The number of Hall sensors (8) is two. The two Hall sensors (8) are arranged on the rear shell (4) at a certain circumferential distance apart. Both Hall sensors (8) are electrically connected to the circuit board (10) and are used to detect the direction of rotation of the motor (1).

7. The peristaltic pump with stable performance and high cost-effectiveness according to claim 1, characterized in that: The pump pipe (3) extends to the outside of the front housing (5) at both ends, and each end is connected to an adapter (15). The adapter (15) is provided with an internal thread, which can be threaded to a connector (16) provided with an external thread, making it easy to replace different models of connectors (16).

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