Peristaltic pump

Abstract

The utility model discloses a peristaltic pump which comprises a driving part, a peristaltic assembly and a transmission assembly, the driving part drives the peristaltic assembly to rotate through the transmission assembly, a detection assembly is arranged on the transmission assembly, and the detection assembly can detect the rotating speed of a rotor in the peristaltic assembly. By arranging the detection assembly on the transmission assembly, the problem that in the prior art, a rotor and a motor often have no space for installation of sensors is solved, rotation speed detection is carried out in a space-saving mode, and miniaturization of the pump is achieved.

Description

Technical Field

[0001] The utility model relates to a peristaltic pump, in particular to a miniaturized peristaltic pump. Background Art

[0002] A peristaltic pump is a pump body that conveys fluids by alternately squeezing and releasing an elastic delivery hose, and it is applied in many production and life fields. For the peristaltic pump used in an infusion pump, etc., its reliable operation needs to be monitored, so there is a structure for detecting the rotation of the rotor that squeezes the tube. The structure for detecting rotation generally installs a sensor such as an encoder on the rotor or the motor. However, when the pump is miniaturized, there is often no space to install the sensor on the rotor and the motor. Summary of the Utility Model

[0003] To overcome the above drawbacks, the purpose of the utility model is to provide a peristaltic pump that can detect the rotation of the rotor while saving space.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a peristaltic pump, including a driving member, further including a peristaltic component and a transmission component, the driving member drives the peristaltic component to rotate through the transmission component, a detection component is arranged on the transmission component, and the detection component can detect the rotation speed of the rotor in the peristaltic component. By arranging the detection component on the transmission component, the problem in the prior art that there is often no space to install the sensor on the rotor and the motor is solved, the rotation speed detection is realized in a space-saving manner, and the miniaturization of the pump is realized.

[0005] Further, the transmission component includes a transmission gear, the detection component includes a light reflector arranged on the transmission gear and an optical transmitter-receiver arranged at a position adapted to the light reflector. By arranging the light reflector on the transmission gear, there is no need for extra space to install the light reflector, saving the space of the pump and realizing the miniaturization of the pump.

[0006] Further, the transmission gear includes a shaft hole and teeth, the teeth and the shaft hole are connected by a web, the light reflector with a slit is arranged on the web, and the optical transmitter-receiver is arranged at a position on the housing adapted to the light reflector.

[0007] Further, the transmission component includes multiple groups of the transmission gears, the multiple groups of the transmission gears are sequentially meshed and connected, and the detection component is arranged on any one of the transmission gears.

[0008] Further, the transmission assembly includes a first transmission gear and a second transmission gear. The first transmission gear is directly connected to the driving member, and the second transmission gear is directly connected to the peristaltic assembly. The diameter of the second transmission gear is greater than that of the first transmission gear. "Direct connection" means that the two components are directly abutted and connected, and there are no other components between the two components.

[0009] Further, the detection assembly is disposed on the second transmission gear.

[0010] Further, the light reflector includes a plurality of light reflecting portions. The plurality of light reflecting portions are arranged in a circular array centered on the shaft hole of the transmission gear, and a slit is formed between two adjacent light reflecting portions.

[0011] Further, the number of the light reflecting portions is 2, 3, 4, 5 or 6.

[0012] Further, the detection assembly is selected from any one of an optical sensor, a magnetic sensor or a Hall sensor.

[0013] Further, the peristaltic assembly includes a rotor and a rotating shaft. The rotating shaft is connected to the driving member through the transmission assembly. The driving member can drive the rotor to rotate through the rotating shaft. A roller is disposed above the rotor. The roller is connected to the rotor through a positioning pin. Driven by the rotor, the roller rotates around the rotating shaft. During the rotation of the roller, the roller and the upper cover can jointly extrude the tube.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1) By disposing the detection assembly on the transmission assembly, the problem that there is often no space to install a sensor for the rotor and the motor in the prior art is solved, and the rotational speed detection is realized while saving space.

[0016] 2) By disposing the light reflector on the transmission gear, no additional space is required to install the light reflector, saving the space of the pump and realizing the miniaturization of the pump.

[0017] 3) An optical sensor is disposed by using a spoke plate. A light reflector with a slit is embedded on the transmission gear, and an optical transmitter-receiver is disposed inside the housing. When the transmission gear rotates, the light reflector also rotates. The light receiving portion detects the rotational speed of the rotor by receiving the reflected light reflected by the light reflector.

[0018] 4) By setting the diameter of the second transmission gear to be greater than that of the first transmission gear, the rotational speed of the second transmission gear is reduced, and the rotational speed of the peristaltic assembly is also reduced, thereby increasing the torque of the peristaltic assembly. Description of the Drawings

[0019] The accompanying drawings, which form a part of this application, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0021] Figure 1 Schematic connection diagram of a peristaltic pump according to an embodiment of the present utility model;

[0022] Figure 2 Schematic connection diagram of a light reflector and a transmission gear according to an embodiment of the present utility model;

[0023] Figure 3 Schematic connection diagram of a light reflector and a transmission gear according to another embodiment of the present utility model;

[0024] Figure 4 Schematic connection diagram of a light reflector and a transmission gear according to still another embodiment of the present utility model.

[0025] In the figure: 1, outer shell; 2, transmission assembly; 21, worm; 22, transmission gear; 221, first transmission gear; 222, second transmission gear; 223, shaft hole; 224, web; 225, tooth; 3, detection assembly; 31, light reflector; 311, light reflection part; 312, slit; 32, optical transmitter-receiver; 33, substrate; 4, peristaltic assembly; 41, rotating shaft; 42, rotor; 43, positioning pin; 44, roller; 45, tube; 46, upper cover. Detailed implementation manners

[0026] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0027] See the appendix Figure 1As shown in the figure, a peristaltic pump in this embodiment includes a driving member and a peristaltic assembly 4. The driving member in this embodiment is a motor, and the motor drives the peristaltic assembly 4 to rotate, enabling the peristaltic pump to operate. Specifically, the peristaltic assembly 4 includes a rotor 42, and the motor can drive the rotor 42 to rotate through a rotating shaft 41. A roller 44 is arranged above the rotor 42. The roller 44 is connected to the rotor 42 through a positioning pin 43. Driven by the rotor 42, the roller 44 rotates around the rotating shaft 41. During the rotation of the roller 44, the roller 44 and the upper cover 46 clamp and squeeze the tube 45, creating a negative pressure inside the tube 45, and the liquid then flows, causing the peristaltic pump to start working.

[0028] Generally, the motors used in peristaltic pumps require low speed and high torque. However, if the pump is miniaturized, the corresponding motor also needs to be miniaturized. However, miniaturized motors are of high speed and low torque. Therefore, in order to obtain the required torque, a transmission assembly 2 is provided between the motor and the peristaltic assembly 4. The motor drives the rotor 42 to rotate through the transmission assembly 2, thereby converting the high speed and low torque of the miniaturized motor into low speed and high torque.

[0029] Specifically, the transmission assembly 2 includes multiple sets of transmission gears 22. The multiple sets of transmission gears 22 include a first transmission gear 221 and a second transmission gear 222, and the first transmission gear 221 meshes with the second transmission gear 222. A worm 21 is sleeved on the output shaft of the motor, and the worm 21 meshes with the first transmission gear 221. The motor drives the first transmission gear 221 to rotate through the worm 21. The rotor 42 and the second transmission gear 222 are coaxially connected through a rotating shaft 41. The diameter of the second transmission gear 222 is larger than that of the first transmission gear 221, thereby reducing the rotation speed of the second transmission gear 222 and also reducing the rotation speed of the peristaltic assembly 4, and increasing the torque of the peristaltic assembly 4.

[0030] In some embodiments, the multiple sets of transmission gears 22, in addition to including the first transmission gear 221 and the second transmission gear 222, further include other transmission gears that are sequentially meshed between the first transmission gear 221 and the second transmission gear 222. The specific number of the transmission gears 22 is determined according to the actual situation, and this application does not make a limitation.

[0031] In some embodiments, a detection component 3 is further included. The detection component 3 is a sensor, including a light reflector 31 disposed on the transmission gear 22 and an optical transmitter-receiver 32 disposed at a position adapted to the light reflector 31. The transmission gear 22 includes a shaft hole 223 and gear teeth 225, and is connected between the gear teeth 225 and the shaft hole 223 by a web 224. An optical sensor is disposed by using the web 224. Specifically, a light reflector 31 with a slit 312 is disposed on the web 224, and an optical transmitter-receiver 32 is disposed at a position on the housing 1 adapted to the light reflector 31. Specifically, a substrate 33 is disposed on the inner side of the housing 1 directly below the light reflector 31, and the optical transmitter-receiver 32 is disposed on the substrate 33. When the transmission gear 22 rotates, the light reflector 31 also rotates with the transmission gear 22, and the light receiving portion of the optical transmitter-receiver 32 receives the reflected light corresponding to the light reflector 31. Therefore, the rotation speed and rotation angle of the transmission gear 22 can be detected, and then the rotation speed and rotation angle of the rotor 42 can be known.

[0032] In some embodiments, the light reflector 31 can be disposed on any one of the transmission gears 22, as long as the rotation speed and rotation angle of the rotor 42 can be detected through the transmission gear 22. Preferably, the light reflector 31 is disposed on the second transmission gear 222, and the second transmission gear 222 rotates coaxially with the rotor 42, and the detection of the rotation speed and rotation angle is more accurate.

[0033] In some embodiments, the detection component 3 is not limited to an optical sensor, and can also be a magnetic sensor or a Hall sensor.

[0034] See the attached Figures 2 - 4 As shown, in some embodiments, the light reflector 31 includes a plurality of light reflecting portions 311. The plurality of light reflecting portions 311 are arranged in a circular array centered on the shaft hole 223 of the transmission gear 22. A slit 312 is formed between two adjacent light reflecting portions 311. During the rotation of the transmission gear 22, the transmitting portion of the optical transmitter-receiver 32 emits a light source to the light reflecting portion 311. When the light source irradiates the reflecting portion, the light source is reflected by the light reflecting portion 311 and can return to the receiving portion of the optical transmitter-receiver 32. When the light source irradiates the slit 312, the optical transmitter-receiver 32 cannot receive the light source signal. Furthermore, according to the number and frequency of the received light source signals, the rotation speed and rotation angle of the transmission gear 22 can be detected, and then the rotation speed and rotation angle of the rotor 42 can be known.

[0035] In some implementations, the number of the light reflecting portions 311 can be 2, 3, 4, 5, 6, etc. The specific number is determined according to the actual situation, and the present application does not make a limitation.

[0036] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] The above embodiments are only for illustrating the technical concept and features of the present utility model, and the purpose is to enable those skilled in the art to understand the content of the present utility model and implement it. However, it should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A peristaltic pump, comprising a driving member, characterized in that: It also comprises a peristaltic component (4) and a transmission component (2), wherein the driving member drives the peristaltic component (4) to rotate via the transmission component (2), and a detection component (3) is provided on the transmission component (2), and the detection component (3) can detect the rotation speed of the rotor (42) in the peristaltic component (4).

2. The peristaltic pump according to claim 1, characterized in that: The transmission assembly (2) comprises a transmission gear (22), and the detection assembly (3) comprises a light reflector (31) arranged on the transmission gear (22) and an optical transmitter-receiver (32) arranged at a position matching the light reflector (31).

3. The peristaltic pump according to claim 2, characterized in that: The transmission gear (22) comprises an axial hole (223) and gear teeth (225); the gear teeth (225) and the axial hole (223) are connected via a spoke plate (224); the light reflector (31) with a slit (312) is arranged on the spoke plate (224); and the optical transmitter and receiver (32) is arranged on the housing (1) at a position matching the light reflector (31).

4. The peristaltic pump according to claim 2, characterized in that: The transmission assembly (2) comprises a plurality of groups of transmission gears (22), the plurality of groups of transmission gears (22) are meshed and connected in sequence, and the detection assembly (3) is arranged on any one of the transmission gears (22).

5. The peristaltic pump according to claim 1, characterized in that: The transmission assembly (2) comprises a first transmission gear (221) and a second transmission gear (222); the first transmission gear (221) is directly connected to the driving member, the second transmission gear (222) is directly connected to the peristaltic assembly (4), and the diameter of the second transmission gear (222) is greater than the diameter of the first transmission gear (221).

6. The peristaltic pump according to claim 5, characterized in that: The detection component (3) is arranged on the second transmission gear (222).

7. The peristaltic pump according to claim 2, characterized in that: The light reflector (31) comprises a plurality of light reflecting parts (311), wherein the plurality of light reflecting parts (311) are arranged in a circular array with the shaft hole (223) of the transmission gear (22) as the center, and a gap (312) is formed between two adjacent light reflecting parts (311).

8. The peristaltic pump according to claim 7, characterized in that: The number of the light reflecting parts (311) is 2, 3, 4, 5 or 6.

9. The peristaltic pump according to claim 1, characterized in that: The detection component (3) is selected from any one of an optical sensor, a magnetic sensor or a Hall sensor.

10. The peristaltic pump according to any one of claims 1 to 9, characterized in that: The peristaltic component (4) comprises a rotor (42) and a rotating shaft (41), wherein the rotating shaft (41) is connected to the driving member via the transmission component (2), and the driving member can drive the rotor (42) to rotate via the rotating shaft (41). A roller (44) is arranged above the rotor (42), and the roller (44) is connected to the rotor (42) via a positioning pin (43). Driven by the rotor (42), the roller (44) rotates around the rotating shaft (41), and during the rotation process, the roller (44) can squeeze the tube (45) together with the upper cover (46).

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