Peristaltic pump

Abstract

The utility model provides a peristaltic pump which comprises a pump shell, a driving mechanism, a peristaltic assembly and a hose, the peristaltic assembly and the hose are arranged in the pump shell, and the peristaltic assembly rotates to extrude the hose to discharge liquid. An extension table is arranged in the pump shell to divide the interior of the pump shell into an upper-layer containing cavity and a lower-layer containing cavity, and a gear ring is arranged on the inner wall of the lower-layer containing cavity and used for containing the wriggling assembly. The peristaltic assembly comprises a first bracket, a plurality of first planetary gears, a sun gear, a second bracket, a plurality of second planetary gears, a connecting bracket, a roller bracket and a roller; due to the fact that the first protruding columns protruding upwards are arranged on the first support, in the assembling process, the first planetary gears are distributed on the first support through the first protruding columns and meshed with the gear ring, the first planetary gears are fixed while being assembled, and compared with an existing assembling mode, the assembling mode is more stable; and assembly failure caused by displacement of the planetary gear in the subsequent assembly process is avoided, and the assembly efficiency of workers is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of peristaltic pump devices, and particularly relates to a peristaltic pump. Background Art

[0002] As a special pumping device, a peristaltic pump drives the rotation of a rotating component inside the pump to squeeze a hose to convey fluid, and periodically squeezes the hose to force the liquid to flow.

[0003] However, the assembly process of a peristaltic pump is often relatively complex. When assembling a peristaltic pump, first, several planetary gears are installed in a gear ring and meshed with the gear ring, and then the sun gear is installed on the output shaft of the motor. Among them, several planetary gears are placed around the sun gear, and the periphery of the sun gear meshes with the planetary gears. However, in the existing assembly method, usually, the first planetary gear is placed on a corresponding bracket, and then other tools are inserted into the shaft hole of the first planetary gear for fixing. The position cannot be fixed while placing the first planetary gear, and the assembly of the planetary gear is relatively inconvenient, and phenomena such as dislocation and misalignment are likely to occur, which easily leads to assembly failure and requires re-assembly, wasting the time of the staff. Therefore, improvement is needed. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a peristaltic pump, which has a simple structure, convenient assembly, higher stability, and improves the assembly efficiency of the staff.

[0005] The technical solution of the utility model is realized as follows:

[0006] A peristaltic pump includes: a pump housing, a driving mechanism, a peristaltic assembly arranged in the pump housing, and a hose. The peristaltic assembly rotates to squeeze the hose to discharge liquid. An extension platform extending inward is arranged in the pump housing. The extension platform divides the interior of the pump housing into upper and lower accommodation cavities. The inner wall of the lower accommodation cavity is provided with a gear ring. The peristaltic assembly includes, from bottom to top in sequence: a first bracket; several first planetary gears; a sun gear; a second bracket. The first bracket is arranged at the bottom of the lower accommodation cavity. Several upward-extending first convex columns are evenly distributed on the first bracket. The several first convex columns penetrate through the several first planetary gears and are fixed to the second bracket. A receiving opening is arranged at the center of the first bracket. The sun gear is connected to the output shaft of the driving mechanism and placed at the receiving opening. The whole body of the sun gear meshes with the several first planetary gears. And, several second planetary gears; a connecting bracket; a roller bracket; several rollers detachably installed in the roller bracket. The several second planetary gears are arranged on the second bracket and fixed to the connecting bracket. The connecting bracket is arranged at the top of the lower accommodation cavity and extends upward to the upper accommodation cavity and is fixed to the roller bracket. The hose, the several rollers, and the roller bracket are arranged in the upper accommodation cavity, and the hose winds around the roller bracket and fits on the outer sides of the several rollers.

[0007] In a preferred embodiment, the second bracket is provided with a mounting opening matching the first convex post, and the first bracket and the second bracket are snap-connected through the first convex post and the mounting opening.

[0008] In a preferred embodiment, a central gear meshing with a plurality of second planetary gears is provided at the center of the second bracket.

[0009] In a preferred embodiment, the connecting bracket is provided with a plurality of second convex posts extending downward, and the second convex posts are inserted into the axles of the plurality of second planetary gears.

[0010] In a preferred embodiment, a third convex post extending upward is provided at the center of the connecting bracket, and a connecting portion matching the third convex post is provided at the center of the roller bracket. The connecting bracket is connected to the roller bracket by inserting the third convex post into the connecting portion.

[0011] In a preferred embodiment, a first notch is provided on one side of the third convex post, and the shape and size of the connecting portion match those of the third convex post.

[0012] In a preferred embodiment, the longitudinal section of the roller bracket has an "I"-shaped structure, a support column is provided at the center of the roller bracket, and a plurality of rollers are fixed around the support column.

[0013] In a preferred embodiment, a second notch matching the plurality of rollers is provided on the body portion of the support column.

[0014] Compared with the prior art, the present utility model has the following advantages:

[0015] The peristaltic pump of the present utility model constructs the interior of the pump housing into upper and lower accommodation cavities. Among them, the inner wall of the lower accommodation cavity is provided with a toothed ring, mainly for placing planetary gears and a sun gear. A driving mechanism is fixed below the pump housing, and the output shaft of the driving mechanism is connected to the sun gear. The upper accommodation cavity is provided with rollers and a hose. The sun gear in the lower layer is driven to rotate, which drives the planetary gears to rotate, and then drives the rollers to rotate. The rotation of the rollers squeezes the hose to pump in and out the liquid. A plurality of first convex posts are provided on the first bracket for fixing the first planetary gears. Compared with the prior art, the design of providing a plurality of first convex posts on the first bracket of the present utility model enables the staff to align the shaft holes of the first planetary gears with the first convex posts and insert them during the assembly operation, directly fixing their positions while assembling the first planetary gears, avoiding the displacement of the planetary gears during the subsequent assembly process and resulting in assembly failure, so as to improve the assembly efficiency of the staff. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a longitudinal sectional view of the peristaltic pump of the present invention;

[0018] Figure 2 It is a perspective view of the peristaltic device in the peristaltic pump of the present invention;

[0019] Figure 3 It is an exploded view of the peristaltic device in the peristaltic pump of the present invention;

[0020] Figure 4 It is a perspective view of the first bracket in the peristaltic pump of the present invention;

[0021] Figure 5 It is a perspective view of the second bracket in the peristaltic pump of the present invention;

[0022] Figure 6 It is a perspective view of the connecting bracket in the peristaltic pump of the present invention;

[0023] Figure 7 It is a perspective view of the roller bracket in the peristaltic pump of the present invention;

[0024] Figure 8 It is a schematic diagram of the matching relationship between the fixed shaft, the roller bracket and the roller in the peristaltic pump of the present invention;

[0025] Figure 9 It is a schematic diagram of removing the outer shell of the peristaltic pump of the present invention;

[0026] Figure 10 It is a perspective view of the pump housing of the peristaltic pump of the present invention.

[0027] Reference numerals in the drawings:

[0028] 100 - peristaltic assembly;

[0029] 10 - first bracket; 11 - first convex post; 12 - receiving opening;

[0030] 20 - second bracket; 21 - mounting opening; 22 - central gear;

[0031] 30 - connecting bracket; 31 - second convex post; 32 - third convex post; 33 - first notch;

[0032] 40 - Roller bracket; 41 - Connecting part; 42 - Support column; 42a - Second notch; 43 - Through hole;

[0033] 50 - First planetary gear;

[0034] 60 - Second planetary gear;

[0035] 70 - Sun gear;

[0036] 80 - Roller;

[0037] 90 - Fixed shaft;

[0038] 200 - Pump housing; 210 - Extension platform; 220 - Upper accommodation cavity; 230 - Lower accommodation cavity;

[0039] 300 - Driving mechanism;

[0040] 400 - Hose. Detailed implementation manner

[0041] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0042] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0044] See Figures 1 to 10, an embodiment of the present utility model discloses a peristaltic pump, which includes a pump housing 200, a driving mechanism 300, a peristaltic assembly 100 disposed in the pump housing 200, and a hose 400. The peristaltic assembly 100 rotates to squeeze the hose 400 to discharge liquid. Further, an extension platform 210 extending inward is provided in the pump housing 200. The extension platform divides the interior of the pump housing 200 into upper and lower accommodation cavities. A toothed ring is provided on the inner wall of the lower accommodation cavity 230. The peristaltic assembly 100 includes, from bottom to top in sequence: a first bracket 10, a plurality of first planetary gears 50, a sun gear 70, a second bracket 20, a plurality of second planetary gears 60, a connecting bracket 30, and a plurality of rollers 80 detachably installed in a roller bracket 40. Specifically, the first bracket 10 is disposed at the bottom of the lower accommodation cavity 230. A plurality of first convex columns 11 extending upward are evenly distributed on the first bracket 10. The plurality of first convex columns 11 penetrate through the plurality of first planetary gears 50 and are fixed to the second bracket 20. A receiving opening 12 is provided at the center of the first bracket 10. The sun gear 70 is connected to the output shaft of the driving mechanism 300 and is placed at the receiving opening 12. The sun gear 70 meshes with the plurality of first planetary gears 50 around its circumference. In addition, the plurality of second planetary gears 60 are disposed on the second bracket 20 and are rotatably connected to the connecting bracket 20. The connecting bracket 30 is disposed at the top of the lower accommodation cavity 230 and extends upward to the upper accommodation cavity 220 and is fixed to the roller bracket 40. Furthermore, the hose 400, the plurality of rollers 80, and the roller bracket 40 are disposed in the upper accommodation cavity 220. The hose 400 is wound around the roller bracket 40 and fits on the outside of the plurality of rollers 80. When the rollers 80 rotate, the hose 400 is squeezed to discharge and intake liquid.

[0045] When assembling the first planetary gear 50 in the prior art, the first planetary gear 50 is only placed on the corresponding bracket, and then other tools are used to penetrate the shaft hole of the first planetary gear 50 for fixation. The position cannot be fixed while placing the first planetary gear 50. However, the assembly accuracy of the peristaltic pump is very important. Any slight deviation may affect the working efficiency and service life of the peristaltic pump. The assembly process of the peristaltic pump is relatively complex. After the planetary gear is embedded in the ring gear, the jig (the jig is an auxiliary tool to ensure that the parts are installed in the correct position and aligned during the assembly process) needs to be withdrawn. During the process of withdrawing the jig, it may rub against the planetary gear, resulting in misalignment and displacement, consuming the time of the staff. In the present utility model, a plurality of first convex columns 11 are provided on the first bracket 10. During installation, the staff can first assemble the first bracket 10, the first planetary gear 50 and the second bracket 20 in the external environment (such as an operating table). Specifically, the first bracket 10 is first placed on the operating table. Since a plurality of first convex columns 11 are provided upward on the first bracket 10, when assembling the first planetary gear 50, the shaft hole of the first planetary gear 50 can be aligned with the first convex columns 11 and penetrated, so as to fix the position of the first planetary gear 50 while installing and placing the first planetary gear 50. Then, the first bracket 10 and the second bracket 20 are fixed through the first convex columns 11 and the mounting opening 21, so as to assemble the first bracket 10, the first planetary gear 50 and the second bracket 20. Then, the three are put into the lower accommodating cavity 230 together. Since the first planetary gear 50 is fixed between the first bracket 10 and the second bracket 20, it will not fall off, reducing the complexity of the installation for the staff and improving the assembly efficiency.

[0046] As Figure 4 shown, a receiving opening 12 is provided at the center of the first bracket 10. This position is used to place the sun gear 70. During installation, the axis of the sun gear 70 is installed on the output shaft of the driving device 300, and the body of the sun gear 70 is located at the receiving opening 12. A plurality of first convex columns 11 extending upward are provided around the first bracket 10. Taking this embodiment as an example, in this embodiment, three first planetary gears 50 are provided, and six first convex columns 11 are correspondingly and evenly distributed. Among them, the three first planetary gears 50 are respectively inserted between the three first convex columns 11 at intervals, and the remaining three first convex columns 11 separate the three first planetary gears 50. At the same time, the first convex columns 11 are connected to the mounting openings 21 of the second bracket 20. Providing six first convex columns 11 can ensure a more stable structure.

[0047] In this embodiment, the second bracket 20 is provided with mounting openings 21 matching the first convex columns 11, and the first bracket 10 and the second bracket 20 are snap-connected through the first convex columns 11 and the mounting openings 21.

[0048] Further, a central gear 22 meshing with a number of second planetary gears 60 is provided at the center of the second support 20. Specifically, the sun gear 70 is fixed to the output shaft of the drive mechanism 300 and rotates under the drive of the drive mechanism 300; further, the rotation of the sun gear 70 drives a number of first planetary gears 50 to rotate along the inner wall of the ring gear; since the first planetary gears 50 are fixed to the first convex posts 11, the first support 10 starts to rotate under the influence of the first planetary gears 50; further, the second support 20 is fixed to the first support 10 and rotates under the influence of the first support 10; since a central gear 22 is provided at the center of the second support 20 and a number of second planetary gears 60 are meshed around the central gear 22, the second planetary gears 60 start to rotate under the meshing action of the central gear 22. During this process, when the sun gear 70 rotates, its rotational speed is distributed to multiple first planetary gears 50. Since the first planetary gears 50 rotate around the sun gear 70, the angular velocity of each first planetary gear 50 is actually lower than that of the sun gear 70, and this process realizes the first deceleration. In addition, the first planetary gears 50 drive the second support 20 to rotate through the first support 10, and the central gear 22 on the second support 20 acts as the sun gear of the second planetary gears 60. Similarly, since the second planetary gears 60 rotate around the central gear 22, their angular velocity is less than the rotational speed of the central gear 22 itself, so the second planetary gears 60 will also experience a deceleration process. And the roller 80 is indirectly connected to the second planetary gears 60, and the rotation of the roller 80 squeezes the liquid in the hose 400. In the prior art, peristaltic pumps generally use reduction motors. In this process, the gears in the reduction motors are all made of metal materials, and the cost is relatively high. The present utility model achieves a deceleration effect by setting a structure of two layers of planetary gears, reduces the cost, and moreover, the slower speed is beneficial to fully squeezing and improves the peristaltic effect.

[0049] In combination with the above, when the present utility model is installed, the sun gear 70 is fixed to the output shaft of the drive mechanism 300 and is located at the accommodating opening 12 in the middle of the first support 10, meshes with a number of surrounding first planetary gears 50, and rotates under the drive of the drive mechanism 300. During installation, the sun gear 70 is fixed to the output shaft, and the first support 10 is placed on the operating table, and then the first planetary gears 50 are assembled on the first support 10. Among them, the shaft holes of the first planetary gears 50 pass through the first convex posts 11 to play a role in fixing the first planetary gears 50; afterwards, the second support 20 is installed, and the first convex posts 11 are engaged by aligning the mounting openings 21 on the second support 20, so that the assembly between the first support 10, the first planetary gears 50 and the second support 20 is firm.

[0050] As Figure 6As shown, in this embodiment, the connecting bracket 30 is provided with a plurality of second protrusions 31 extending downward, and the second protrusions 31 are plugged into the axles of the plurality of second planetary gears 60. Specifically, the central gear 22 on the second bracket 20 acts as the sun gear of the plurality of second planetary gears 60. When the second bracket 20 rotates under the influence of the first bracket 10, the central gear 22 drives the plurality of second planetary gears 60 to rotate, and the second planetary gears 60 are the key components driving the connecting bracket 30 to rotate. By plugging the second protrusions 31 into the axle holes of the second planetary gears 60, the connecting bracket 30 can rotate with the plurality of second planetary gears 60. At the same time, the connecting bracket 30 is used as a connecting member to transmit the rotation of the planetary gear to the roller 80 to make it rotate. The connecting bracket 30 is arranged at the top of the lower accommodating chamber 230, and extends to the upper accommodating chamber 220 to be plugged into the roller bracket 40. After the first bracket 10, the first planetary gear 50 and the second bracket 20 are assembled, the connecting bracket 30 needs to be connected to the second planetary gear 60. Specifically, the connecting bracket 30 has a "丄" structure, and is provided with a plurality of second bosses 31 extending downwardly. The number of the second bosses 31 is the same as the number of the second planetary gears 60, and the second bosses 31 are inserted downwardly into the axial holes of the second planetary gears 60, so that the connection between the connecting bracket 30 and the parts of the lower part of the peristaltic assembly 100 is stably connected.

[0051] Furthermore, a third boss 32 extending upward is provided at the center of the connecting bracket 30, and a connecting portion 41 matching the third boss 32 is provided at the center of the roller bracket 40. The connecting bracket 30 is connected to the roller bracket 40 by plugging the third boss 32 into the connecting portion 41. The third boss 32 is plugged into the connecting portion 41 at the center of the roller bracket 40, so that the connecting bracket 30 and the roller bracket 40 are fixed, and then when the connecting bracket 30 is rotated by an external force, the roller bracket 40 is driven to rotate.

[0052] Preferably, a first notch 33 is provided on one side of the third convex column 32, and the shape and size of the connecting portion 41 match the third convex column 32. Figure 6 As shown, the third boss 32 is shaped like a cylinder as a whole, and the first notch 33 makes the cross-section of the third boss 32 "D"-shaped, making it asymmetric. Similarly, the shape and size of the connecting portion 41 match the third boss 32. This design makes the engagement between the third boss 32 and the roller bracket 40 more stable, ensuring that the connecting bracket 30 can better drive the roller bracket 40 to rotate.

[0053] like Figure 7 and Figure 8As shown, the longitudinal section of the roller bracket 40 has an "I"-shaped structure. A support column 42 is provided at the center of the roller bracket 40, and a number of rollers 80 are fixed around the support column 42. Further, a second notch 42a matching the number of rollers 80 is provided on the body of the support column 42. The roller 80 is a cylinder, and the second notch 42a is designed to be tangent to the body of the roller 80, so that when assembling the roller 80, the second notch 42a can help the staff locate the position of the roller 80 faster and more conveniently.

[0054] As Figure 8 shown, after assembling a number of rollers 80 on the roller bracket 40, the fixed shaft 90 is passed through the mounting holes on the roller bracket 40 to fix the number of rollers 80.

[0055] In summary, the assembly process of the peristaltic pump of the present utility model is as follows: The sun gear 70 is fixed on the output shaft of the driving mechanism 300 and is disposed in the middle of the first bracket 10; the first bracket 10 is placed on the operating table, and then a plurality of first planetary gears 50 are assembled on the first bracket 10. Among them, the first bracket 10 passes through the shaft holes of the plurality of first planetary gears 50 respectively through a plurality of first convex columns 11 so that these first planetary gears 50 are fixed. After that, the second bracket 20 is assembled. The mounting opening 21 on the second bracket 20 is inserted into the first convex column 11 on the first bracket 10 to fix the two brackets. Then, the staff puts the assembled first bracket 10, first planetary gears 50 and second bracket 20 into the lower accommodating cavity 230; around the central gear 22 of the second bracket 20 is used to place a plurality of second planetary gears 60. First, a plurality of second convex columns 31 of the connecting bracket 30 are respectively inserted into the shaft holes of the plurality of second planetary gears 60, and then the connecting bracket 30 and the plurality of second planetary gears 60 are integrally assembled on the second bracket 20. At this step, all the components in the lower accommodating cavity 230 are installed. After that, the roller 80 is assembled on the roller bracket 40 and fixed with the fixing shaft 90. The third convex column 32 extending to the upper accommodating cavity 220 through the connecting bracket 30 is inserted into the roller bracket 40 to complete the fixation of the peristaltic assembly 100. Then, the pump housing 200 is covered and the driving mechanism 300 is connected. The hose 400 is disposed around the roller 40 bracket and is arranged in contact with a plurality of rollers 80. When the driving mechanism 300 drives the sun gear 70 to rotate, the sun gear drives a plurality of first planetary gears 50 to rotate and drive the first bracket 10 to rotate; the second bracket 20 rotates under the action of the first convex column 11. Since the central gear 22 is provided in the center of the second bracket 20, therefore, the central gear 22 acts as the sun gear of the plurality of second planetary gears 60, causing the plurality of second planetary gears 60 to rotate; furthermore, the connecting bracket 30, the roller bracket 40 and a plurality of rollers 80 rotate synchronously. When the plurality of rollers 80 rotate in the pump housing 200, they continuously squeeze the inlet and outlet of the hose 400, causing the hose 400 to continuously feed and discharge liquid. This assembly method of the present utility model can better fix a plurality of planetary gears and the corresponding brackets into a module, fix them while placing the planetary gears, and avoid the displacement of the planetary gears during the subsequent assembly process, resulting in assembly failure, so as to improve the assembly efficiency of the staff.

[0056] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A peristaltic pump, comprising a pump housing (200), a driving mechanism (300), a peristaltic assembly (100) disposed within the pump housing (200), and a hose (400), wherein the peristaltic assembly (100) rotates to squeeze the hose (400) to discharge liquid, and is characterized in that, An extension platform (210) extending inward is provided inside the pump housing (200). The extension platform (210) constructs the interior of the pump housing (200) into upper and lower two-layer accommodation cavities. The inner wall of the lower accommodation cavity (230) is provided with a toothed ring. The peristaltic assembly (100) includes, from bottom to top in sequence: A first bracket (10); several first planetary gears (50); a sun gear (70); a second bracket (20); The first bracket (10) is arranged at the bottom of the lower accommodation cavity (230). Several first convex columns (11) extending upward are evenly distributed on the first bracket (10). The several first convex columns (11) penetrate through the several first planetary gears (50) and are fixed to the second bracket (20). An accommodation opening (12) is provided at the center of the first bracket (10). The sun gear (70) is connected to the output shaft of the driving mechanism (300) and is placed at the accommodation opening (12). The sun gear (70) meshes with the several first planetary gears (50) all around; and, Several second planetary gears (60); a connecting bracket (30); a roller bracket (40); several rollers (80) detachably installed inside the roller bracket (40); The several second planetary gears (60) are arranged on the second bracket (20) and are fixed to the connecting bracket (30). The connecting bracket (30) is arranged at the top of the lower accommodation cavity (230) and extends upward to the upper accommodation cavity (220) and is fixed to the roller bracket (40); The hose (400), the several rollers (80) and the roller bracket (40) are arranged in the upper accommodation cavity (220). The hose (400) winds around the roller bracket (40) and fits against the outside of the several rollers (80).

2. The peristaltic pump according to claim 1, characterized in that, The second bracket (20) is provided with a mounting opening (21) matching the first convex column. The first bracket (10) and the second bracket (20) are snap-connected through the first convex column and the mounting opening (21).

3. The peristaltic pump according to claim 1, wherein A central gear (22) meshing with the several second planetary gears (60) is provided at the center of the second bracket (20).

4. The peristaltic pump according to claim 1, wherein The connecting bracket (30) is provided with several second convex columns (31) extending downward. The second convex columns (31) are inserted into the axles of the several second planetary gears (60).

5. The peristaltic pump according to claim 1, characterized in that, A third convex column (32) extending upward is provided at the center of the connecting bracket (30). A connecting portion (41) matching the third convex column (32) is provided at the center of the roller bracket (40). The connecting bracket (30) is connected to the roller bracket (40) by inserting the third convex column (32) into the connecting portion (41).

6. The peristaltic pump according to claim 5, characterized in that, A first notch (33) is provided on one side of the third convex column (32). The shape and size of the connecting portion (41) match the third convex column (32).

7. The peristaltic pump according to claim 1, wherein The longitudinal section of the roller bracket (40) is in an "I" shape structure. A support column (42) is provided at the center of the roller bracket (40). The several rollers (80) are fixed around the support column (42).

8. The peristaltic pump according to claim 7, wherein A second notch matching the several rollers (80) is provided on the body of the support column (42).

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