Peristaltic pump

Abstract

The utility model relates to a peristaltic pump which comprises a shell, a driver, a roller assembly and a pump pipe. The shell is provided with a groove body, and the groove side wall of the groove body forms a convex arc-shaped surface; the driver comprises a stator and a rotor, the stator is fixed in the groove body and located on one radial side of the arc-shaped surface, and the rotor rotates around the axis of the stator; the rolling wheel assembly is arranged in the groove body and comprises at least two rolling wheels, the two rolling wheels are connected to the periphery of the rotor and distributed in the circumferential direction of the rotor at intervals, and the axis extending direction of each rolling wheel is the same as the axis extending direction of the stator; the pump pipe is arranged in the groove body and located between the arc-shaped face and the idler wheels, and the two ends of the pump pipe are located outside the groove body. The driver of the brushless motor is arranged in the groove body and is integrated with the roller assembly, so that the peristaltic pump can be designed in a flat mode, the size is reduced, and the peristaltic pump is suitable for a limit space. And the driver is high in efficiency and low in noise.

Description

Technical Field

[0001] This utility model relates to the field of liquid pump technology, specifically to a peristaltic pump. Background Technology

[0002] Peristaltic pumps deliver fluid by squeezing a flexible hose with rotating rollers or cams. As the rollers rotate and squeeze the hose, the cross-sectional area of ​​the squeezed portion of the hose decreases, forcing the fluid inside to move forward. After the rollers release, the hose returns to its original shape, creating a negative pressure zone that attracts more fluid to the rear of the hose. Through the continuous repetition of this squeeze-release cycle, continuous and precise fluid delivery is achieved.

[0003] Traditional peristaltic pumps are generally large in size, which limits their application scenarios. Utility Model Content

[0004] Based on the above description, this utility model provides a peristaltic pump to solve the problem of the large size of existing peristaltic pumps.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A peristaltic pump includes: a housing, a driver, a roller assembly, and a pump tube;

[0007] The housing is provided with a groove, and the sidewall of the groove forms an outwardly convex arc-shaped surface;

[0008] The driver includes a stator and a rotor. The stator is fixed in the slot and located on one radial side of the arcuate surface. The rotor rotates about the axis of the stator.

[0009] The roller assembly is disposed in the groove and includes at least two rollers. The two rollers are connected to the periphery of the rotor and are distributed at intervals along the circumference of the rotor. The axial extension direction of each roller is the same as the axial extension direction of the stator.

[0010] The pump pipe is disposed in the tank and located between the arc-shaped surface and each of the rollers, with both ends of the pump pipe located outside the tank.

[0011] Based on the above technical solution, the present invention can be further improved as follows:

[0012] Furthermore, the roller assembly also includes a bracket, which is rotatably connected to the housing about the axis of the stator, and the bracket is provided with a receiving groove;

[0013] The stator and the rotor are housed in the receiving groove, and the rotor is fixedly connected to the bracket;

[0014] The two rollers are connected to the periphery of the bracket.

[0015] Furthermore, the bracket has at least two mounting grooves recessed on its periphery, and the two mounting grooves are distributed at intervals along the periphery of the bracket.

[0016] Each of the rollers is rotatably mounted in its corresponding mounting slot and at least partially protrudes from the opening of the corresponding mounting slot.

[0017] Furthermore, the rotor is located on the periphery of the stator and connected to the sidewall of the receiving groove.

[0018] Furthermore, the rotor is a ring magnet.

[0019] Furthermore, the bottom wall of the groove body is provided with a protrusion extending along the axial direction of the stator, and the protrusion is fixed in the inner hole of the stator.

[0020] Furthermore, the peristaltic pump also includes a cover that covers the opening of the groove and is detachably connected to the housing.

[0021] Furthermore, the driver also includes a drive circuit board, which is disposed in the tank and located between the bottom wall of the tank and the stator.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0023] The stator is fixed within the tank, and the rotor is rotatably connected around the axis of the stator. Two rollers are connected to the periphery of the rotor. As the rotor rotates, it drives the rollers to squeeze the pump tube when they move to the corresponding arc-shaped surface, thus delivering liquid and enabling the peristaltic pump to operate normally. This is equivalent to integrating the brushless motor's driver within the tank and the roller assembly, allowing for a flattened design and reduced size, making the peristaltic pump suitable for confined spaces. Furthermore, the brushless motor's driver offers high efficiency and low noise. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of a peristaltic pump provided in an embodiment of this utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the exploded structure;

[0026] Figure 3 A cross-sectional schematic diagram of a peristaltic pump provided for an embodiment of the present utility model;

[0027] Figure 4 This is a cross-sectional schematic diagram of a peristaltic pump provided as an embodiment of the present invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Housing; 11. Groove; 111. Arc-shaped surface; 12. Opening; 13. Protrusion; 131. Mounting hole; 2. Driver; 21. Stator; 211. Stator core; 212. Coil; 22. Rotor; 221. Ring magnet; 23. Drive circuit board; 3. Roller assembly; 31. Roller; 32. Bracket; 321. Receiving groove; 322. Rotating rod; 323. Mounting groove; 33. Protrusion; 331. Through hole; 34. Shaft; 4. Pump pipe; 41. Pipe body; 42. Connector; 5. Bearing; 6. Cover; 61. Mating block. Detailed Implementation

[0030] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0032] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0033] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0034] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0035] Please refer to Figures 1 to 4 This utility model provides a peristaltic pump, including a housing 1, a driver 2, a roller assembly 3, and a pump tube 4; the housing 1 is provided with a groove 11, and the sidewall of the groove 11 forms an outwardly convex arcuate surface 111; the driver 2 includes a stator 21 and a rotor 22, the stator 21 is fixed in the groove 11 and located on one radial side of the arcuate surface 111, and the rotor 22 is rotatably connected around the axis of the stator 21; the roller assembly 3 is disposed in the groove 11 and includes at least two rollers 31, the two rollers 31 are connected to the periphery of the rotor 22 and are distributed circumferentially at intervals along the rotor 22, and the axial extension direction of each roller 31 is the same as the axial extension direction of the stator 21; the pump tube 4 is disposed in the groove 11 and is located between the arcuate surface 111 and each roller 31, and both ends of the pump tube 4 are located outside the groove 11.

[0036] In this embodiment, the stator 21 is fixed inside the tank 11, and the rotor 22 is rotatably connected around the axis of the stator 21. Two rollers 31 are connected to the periphery of the rotor 22. As the rotor 22 rotates, it drives each roller 31 to squeeze the pump tube 4 at the corresponding arc-shaped surface 111, thereby delivering liquid and enabling the peristaltic pump to operate normally. This is equivalent to integrating the brushless motor driver 2 within the tank 11 and the roller assembly 3, allowing for a flattened design and reduced size, making the peristaltic pump suitable for use in confined spaces. Furthermore, the brushless motor driver 2 is highly efficient and low-noise.

[0037] To fix the stator 21 within the groove 11, the bottom wall of the groove 11 is provided with a protrusion 13 extending axially along the stator 21, and the protrusion 13 is fixed in the inner hole of the stator 21. The inner hole of the stator 21 and the protrusion 13 are interference-fitted, thereby securely installing the stator 21 within the groove 11.

[0038] Specifically, in this embodiment, referring to Figures 2 to 4The stator 21 includes a stator core 211 and a plurality of coils 212 surrounding the stator core 211. The stator core 211 is made of multiple layers of silicon steel sheets stacked together and glued together. The inner hole of the stator core 211 is interference-fitted with the protrusion 13.

[0039] In order to connect each of the rollers 31 to the rotor 22, continue referring to... Figures 2 to 4 The roller assembly 3 further includes a bracket 32, which is rotatably connected to the housing 1 about the axis of the stator 21. The bracket 32 ​​has a receiving groove 321. The stator 21 and the rotor 22 are housed in the receiving groove 321, and the rotor 22 is fixedly connected to the bracket 32. Two rollers 31 are connected to the periphery of the bracket 32. Thus, the rotation of the rotor 22 can drive the housing 1 to rotate, causing each of the rollers 31 connected to the periphery of the bracket 32 ​​to press the pump pipe 4. In this way, the stator 21 and the rotor 22 are housed in the receiving groove 321, tightly integrating the stator 21, the rotor 22 and the roller assembly 3, reducing the space occupied. Moreover, the arrangement of each component is reasonable and easy to install and manufacture.

[0040] Furthermore, in this embodiment, referring to Figure 2 and Figure 4 The protruding post 13 has a recessed mounting hole 131 on the bottom wall of the groove body 11 away from the groove body 11. The peristaltic pump includes a bearing 5, which is installed in the mounting hole 131. The bottom wall of the receiving groove 321 is provided with a rotating rod 322, which is rotatably connected to the bearing 5. Thus, the bracket 32 ​​can be rotatably installed in the groove body 11 around the axis of the stator 21. The structure is simple and easy to set up.

[0041] In another embodiment, the bracket 32 ​​may have a rotating ring on the side facing the groove 11 that corresponds to or surrounds the groove opening, and the rotating ring protrudes radially from each of the rollers 31 along the stator 21. A mating bearing 5 that is rotatably connected to the rotating ring is installed on the bottom wall of the groove 11.

[0042] It should be noted that the number of bearings 5 ​​is not limited. In this embodiment, refer to... Figure 4 Two bearings 5 ​​are provided, and the two bearings 5 ​​are respectively located at both ends of the mounting hole 131, so that when the rotating rod 322 is installed into the mounting hole 131, the two bearings 5 ​​are rotatably connected to both ends of the rotating rod 322, thereby making the bracket 32 ​​rotate more smoothly and improving stability.

[0043] In this embodiment, refer to Figure 2 and Figure 4The driver 2 further includes a drive circuit board 23, which is disposed within the slot 11 and located between the bottom wall of the slot 11 and the stator 21. The drive circuit board 23 controls the energization of the plurality of coils 212, causing the stator 21 to generate a radial magnetic field that interacts with the rotor 22. Under the action of the magnetic force, the rotor 22 drives the support 32 to rotate. The drive circuit board 23 is a commonly used drive circuit board in the art, specifically for brushless motors, and will not be described in detail here.

[0044] It should be noted that when the bracket 32 ​​is rotatably connected to the groove 11 through the rotating ring and the mating bearing 5, the drive circuit board 23 is located on the bottom wall of the receiving groove 321 to avoid interference between the bracket 32 ​​and the wires connected to the drive circuit board 23.

[0045] In this invention, the positional arrangement between the stator 21 and the rotor 22 can be either an inner rotor 22 structure or an outer rotor 22 structure. In one embodiment, the stator 21 and the rotor 22 are arranged as an inner rotor 22 structure, with the rotor 22 disposed within the inner hole of the stator core 211 and connected to the periphery of the rotating rod 322. This results in higher rotational speed, lower torque, and smaller size.

[0046] In this embodiment, refer to Figures 2 to 4 The rotor 22 is located on the periphery of the stator 21 and connected to the sidewall of the receiving groove 321. This results in a lower rotational speed, higher torque, and stronger driving force.

[0047] It should be noted that the structure of the rotor 22 is not limited, as long as it can interact with the stator 21 and rotate under the action of a magnetic field. In this embodiment, the rotor 22 is configured as a ring magnet 221. In another embodiment, it includes multiple arc-shaped magnetic blocks, all of which are connected to the sidewall of the receiving groove 321 and are distributed circumferentially along the sidewall of the receiving groove 321.

[0048] To mount each of the rollers 31 onto the bracket 32, in this embodiment, the bracket 32 ​​has at least two mounting grooves 323 recessed on its circumference, and the two mounting grooves 323 are spaced apart along the circumference of the bracket 32. Each roller 31 is rotatably mounted in its corresponding mounting groove 323, and at least partially protrudes from the opening of the corresponding mounting groove 323. When the bracket 32 ​​rotates, the portion of each roller 31 protruding from its corresponding mounting groove 323 presses against the pump tube 4.

[0049] Specifically, refer to Figure 2In this embodiment, the bracket 32 ​​has at least four protrusions 33 on its periphery. Each pair of protrusions 33 is connected to the periphery of two end faces of the bracket 32 ​​and is radially distributed relative to each other. Each protrusion 33 has a through hole 331 extending radially along the bracket 32. The mounting groove 323 is defined between two protrusions 33 radially distributed relative to each other along the axial direction of the bracket 32. The roller assembly 3 also includes at least two rotating shafts 34. Each roller 31 is disposed in a corresponding mounting groove 323, and each rotating shaft 34 passes through the inner hole of a corresponding roller 31. Both ends of the rotating shaft 34 are rotatably connected to the two through holes 331, thereby allowing each roller 31 to be rotatably mounted in its corresponding mounting groove 323. This results in a simple structure that is easy to install.

[0050] In another embodiment, the two protrusions 33, which are radially opposite to each other along the bracket 32, may each have a locking point that is positioned opposite to each other. The length of the mounting groove 323 is adapted to the length of the roller 31, so that when the roller 31 is installed into the mounting groove 323, the two locking points respectively engage with the two ends of the inner hole of the roller 31, thereby allowing each roller 31 to be rotatably installed in its corresponding mounting groove 323.

[0051] It should be noted that the number of rollers 31 installed is not limited, as long as they can continuously squeeze the pump tube 4, causing liquid to be output from the pump tube 4. In this embodiment, four rollers 31 are set, and the four rollers 31 are evenly distributed around the periphery of the bracket 32. Correspondingly, eight protrusions 33 and four rotating shafts 34 are set. This improves work efficiency.

[0052] In this embodiment, refer to Figure 1 and Figure 2 The peristaltic pump also includes a cover 6, which covers the opening of the groove 11 and is detachably connected to the housing 1. This protects the internal structure and facilitates inspection and maintenance.

[0053] Specifically, in this embodiment, we continue to refer to... Figure 1 and Figure 2The groove 11 has two openings 12 on its wall, located on one side of the arc-shaped surface 111. Both openings 12 penetrate the groove opening of the groove 11 along the radial direction of the housing 1, away from the bottom wall of the groove 11. This facilitates the installation of the pump pipe 4. The pump pipe 4 includes a pipe body 41 and two connectors 42 connected to both ends of the pipe body 41. The pipe body 41 is located inside the groove 11, and the two connectors 42 are respectively located at the two openings 12. The outer shell has two corresponding mating blocks 61. When the outer shell is installed on the cover 6, the two mating blocks 61 are respectively located in the two openings 12 and abut against each connector 42, thereby securing the two connectors 42 in the two openings 12 and fixing them in place.

[0054] It should be noted that the detachable installation structure of the cover 6 and the housing 1 is not limited. In this embodiment, refer to... Figure 1 and Figure 2 The housing 1 has multiple threaded holes, and the cover 6 has through-holes corresponding to the multiple threaded holes. Multiple bolts pass through the multiple mating holes and are screwed into the multiple threaded holes, thereby installing the cover 6 onto the housing 1. The cover 6 can be removed from the housing 1 by releasing the bolts.

[0055] In another embodiment, the cover 6 and the housing 1 are respectively provided with a plurality of engaging blocks and a plurality of engaging slots. The cover 6 is installed on the housing 1 by each of the blocks engaging into its corresponding slot. When disassembly is required, the cover 6 is pulled to disengage the blocks from their corresponding slots, thereby removing the cover 6 from the housing 1.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A peristaltic pump characterized by, The application relates to a peristaltic pump. The peristaltic pump comprises a shell (1), a driver (2), a roller assembly (3) and a pump pipe (4). The shell (1) is provided with a groove body (11), and the groove side wall of the groove body (11) forms an outward convex arc surface (111). The driver (2) comprises a stator (21) and a rotor (22), the stator (21) is fixed in the groove body (11) and located on the radial side of the arc surface (111), and the rotor (22) rotates around the axis of the stator (21). The roller assembly (3) is arranged in the groove body (11) and comprises at least two rollers (31), the two rollers (31) are connected to the periphery of the rotor (22) and are spaced apart along the circumferential direction of the rotor (22), and the axis extension direction of each roller (31) is the same as the axis extension direction of the stator (21). The pump pipe (4) is arranged in the groove body (11) and located between the arc surface (111) and each roller (31), and the two ends of the pump pipe (4) are located outside the groove body (11).

2. The peristaltic pump of claim 1, wherein, The roller assembly (3) further comprises a support (32), the support (32) is rotatably connected to the shell (1) around the axis of the stator (21), and the support (32) is provided with a containing groove (321). The stator (21) and the rotor (22) are contained in the containing groove (321), and the rotor (22) is fixedly connected with the support (32). The two rollers (31) are connected to the periphery of the support (32).

3. The peristaltic pump of claim 2, wherein, The circumferential side of the support (32) is recessed with at least two mounting grooves (323), and the two mounting grooves (323) are spaced apart along the circumferential side of the support (32). Each roller (31) is rotatably arranged in the corresponding mounting groove (323) and at least partially protrudes from the groove opening of the corresponding mounting groove (323).

4. The peristaltic pump of claim 2, wherein, The rotor (22) is arranged at the periphery of the stator (21) and connected to the groove side wall of the containing groove (321).

5. A peristaltic pump according to claim 1 or 4, wherein The rotor (22) is provided as a ring-shaped magnet (221).

6. The peristaltic pump of claim 1, wherein, The groove bottom wall of the groove body (11) is provided with a convex column (13) extending in the axial direction of the stator (21), and the convex column (13) is fixed in the inner hole of the stator (21).

7. The peristaltic pump of claim 1, wherein, The peristaltic pump further comprises a cover body (6), the cover body (6) covers the groove opening of the groove body (11) and is detachably connected to the shell (1).

8. The peristaltic pump of claim 1, wherein, The driver (2) further comprises a driving circuit board (23), the driving circuit board (23) is arranged in the groove body (11) and located between the groove bottom wall of the groove body (11) and the stator (21).

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