An easy-to-assemble peristaltic pump and installation method thereof

Abstract

The present invention relates to an easily assembled peristaltic pump and its installation method. The micro-sized peristaltic pump for fluid transmission comprises a pump head assembly and a drive assembly. The pump head assembly comprises a pump head housing, a roller assembly, and a hose assembly. The drive assembly comprises a planetary gear assembly, a drive chamber housing, and a motor. The drive assembly rotates and drives the roller assembly to squeeze the fluid within the hose assembly for fluid transmission. The present invention utilizes a positioning device to locate the center of the roller assembly, enabling easy and convenient central axis positioning, assembly, and fixation during the peristaltic pump assembly process.

Description

Technical Field

[0001] The invention relates to a peristaltic pump device, in particular to an assembly structure and an installation method of a peristaltic pump, and in particular to an easy-to-assemble peristaltic pump and an installation method thereof. Background Art

[0002] With the advancement of human science and technology, the intelligent and automated production of products has become a key factor in improving production efficiency and enhancing product market competitiveness. Peristaltic pumps, with their low operating noise, easy operation, stable performance, data retention during power outages, high flow rates, and timing capabilities, are widely used in cleaning, medicine, food, and chemical industries. To adapt to modern intelligent products, traditional peristaltic pumps, especially micro-peristaltic pump structures, not only have increasingly stringent requirements for flow accuracy design, but also an urgent need for large-scale automated production.

[0003] In order to achieve the miniaturization of the micro peristaltic pump and the requirement of simple and automated assembly of the peristaltic pump, the present invention makes the following improvements. Summary of the Invention

[0004] The purpose of the present invention is to provide an easily assembled peristaltic pump and an installation method thereof. The disclosed technical solutions are as follows:

[0005] A peristaltic pump that is easy to assemble, a micro-sized peristaltic pump (10) for fluid transmission, comprising a pump head assembly (11) and a drive assembly (12), wherein the pump head assembly (11) comprises a pump head housing (111), a roller assembly (112) and a hose assembly (113), and the drive assembly (12) comprises a planetary gear assembly (121), a drive chamber housing (122) and a motor (123), wherein the drive assembly (12) rotates and drives the roller assembly (112) to squeeze the fluid in the hose assembly (113) for flow transmission, and is characterized in that it also includes a positioning device (20), wherein a positioning pin (1121) is provided on the roller bracket end panel of the roller assembly (112), and is adapted to be combined and fixed with a positioning hole column (22) on the positioning mounting panel (23) provided on the positioning device (20).

[0006] Furthermore, the driving assembly (12) includes a planetary gear assembly (121), a driving chamber housing (122) and a motor (123), the positioning device (20) is arranged in the driving chamber housing (122) with a gear ring (1221), and a positioning column (21) for positioning the planetary gear (1211) of the planetary gear assembly (121) is provided on the positioning mounting panel (23) of the positioning device (20).

[0007] Peristaltic pumps transfer fluids by squeezing the hose through the roller assembly on the pump head. Micro-peristaltic pumps, in particular, have relatively high requirements for flow accuracy and lifespan. Controlling the rotation speed, extrusion angle, and strength of the roller assembly are key technical requirements in product design. Therefore, the installation and positioning of the center axis of the roller assembly is extremely important, as it significantly impacts the peristaltic pump's compression, fluid pulses, and hose wear. Even slight misalignment of the roller assembly can greatly affect the flow rate and lifespan of the peristaltic pump. In this design, a positioning device is designed to locate the center of the roller assembly, enabling easy and convenient center axis positioning, assembly, and fixation during the peristaltic pump assembly process.

[0008] Furthermore, the gear mounting panel (23) of the positioning device (20) can be rotatably arranged on the base panel of the driving chamber housing (122).

[0009] Furthermore, the gear mounting panel (23) of the positioning device (20) is configured as a separate accessory that is adapted to be mounted on the base surface of the drive chamber housing (122).

[0010] Furthermore, the positioning columns (21) and positioning hole columns (22) are arranged to be evenly spaced apart from each other, and the positioning columns (21) and positioning hole columns (22) are arranged to be evenly distributed on the gear mounting panel (23) in the form of concentric circles. Currently, micro-sized peristaltic pumps are widely used and, in order to save costs, all components of the peristaltic pump are made of plastic. The gears in the planetary gear assembly are also made of plastic. Compared with the planetary gear structure made of metal with good rigidity used in general mechanical equipment, there is a certain gap in precision. In general planetary gear transmission design, the planetary gear, sun gear and outer gear ring are directly engaged and positioned, which has high requirements on mechanical design tolerance and high rigidity requirements on the manufacturing material. Plastic, as a low-cost material, has certain difficulties in manufacturing. The present invention positions the planetary gear in advance through the positioning column, greatly reducing the precision requirements on the gear radius and tooth meshing, thereby reducing the difficulty of manufacturing and assembling the planetary gear assembly in the micro-sized peristaltic pump.

[0011] Furthermore, the positioning columns (21) and positioning hole columns (22) are arranged in three evenly spaced arrangements, forming two intersecting equilateral triangles arranged on the gear mounting panel (23). The planetary gear assembly in the peristaltic pump drive assembly is fixed and the roller assembly is fixed in a stable arrangement and positioning in an evenly intersecting triangle, so that the rotation drive of the roller assembly is firmly positioned on the central axis, which makes the positioning simpler and more accurate during the production and installation process, thereby improving the overall performance of the peristaltic pump, such as the flow rate and life. The planetary gear assembly in the drive assembly and the roller assembly of the pump head assembly cooperate through the positioning hole (22) and the positioning column (1121) to form a rotatable whole. A through hole (24) is provided in the middle of the mounting panel (23), and a central boss (1223) is provided on the drive chamber housing (122). The through hole (24) and the central boss (1223) form a lower end rotating pair, and the inner hole of the roller assembly and the central boss of the pump head housing (111) also form an upper end rotating pair. These two revolute pairs ensure that the roller assembly's rotational motion has a highly accurate center of rotation. Compared to peristaltic pumps where the roller assembly's lower end is limited solely by planetary gears, performance in terms of flow rate, lifespan, and noise levels are significantly improved, while production costs are reduced.

[0012] Furthermore, a through hole (24) is provided on the concentric circle surrounded by the positioning column (21) and the positioning hole column (22) of the gear mounting panel (23). The central axis of the transmission rod (1231) of the motor (123) passes through the through hole (24) and is connected to the center of the sun gear (1212) of the planetary gear assembly (121) and fixed on the central axis of the concentric circle. The central axis point of the motor shaft serves as the center of the concentric circle, and the sun gear and the planet gear are fixed by the motor transmission rod and the positioning column respectively, thereby reducing the respective diameters and the meshing accuracy of the teeth.

[0013] Furthermore, the inner hole of the positioning hole column (22) is set as a cylindrical hole, the outer periphery is a triangular prism structure, and the cylindrical hole end is provided with a guide groove. The stable structure of the triangular prism is not only different from the cylindrical positioning column in shape, forming an identification during the pump assembly process, but also more suitable for guiding the positioning pin of the roller assembly into the positioning hole.

[0014] Furthermore, the transmission rod (1231) is inserted into the center hole (1222) provided on the roller bracket for center positioning during the assembly process. In the invention, when the roller assembly and the drive assembly are installed in conjunction with each other, due to the effect of the positioning pin, the radially rotating roller assembly is used to slide the positioning pin into the positioning hole column, thereby achieving simple blind installation. This is more convenient to operate and is very suitable for automated assembly. During the rotary blind installation process, the transmission rod of the motor is inserted into the roller bracket to first achieve radial positioning, thereby achieving more accurate positioning assembly on the central axis.

[0015] Furthermore, the drive assembly (12) further includes a hose assembly fixing seat (1222). The hose fixing seat is arranged at the outer edge of the drive chamber shell of the drive assembly, and is used for fixing and installing the hose assembly during the peristaltic pump assembly process. Because the hose of the peristaltic pump is fluffy in its natural state when not installed and squeezed, when assembled around the periphery of the roller assembly and the pump shell cavity, the hose will not only move and get stuck when not tightened, and cannot be installed, but is also more likely to be damaged. In the design of the present invention, one end of the hose is first fixed to the fixing seat, and then tightened around the roller assembly before installation. During the assembly process, the hose is in a tightened state, achieving quick and simple assembly. The characteristic is that when operated by an automated manipulator, the operating difficulty is greatly reduced.

[0016] Furthermore, the inner hole of the positioning hole column (22) is set as a cylindrical hole, the outer periphery is a triangular prism structure, and a guide groove is set at the end of the cylindrical hole. The outer periphery of the positioning hole column is set as a triangular prism, which provides guidance when the roller assembly is blindly installed by radial rotation, and the positioning pin is less likely to slide into the gap between the gear and the positioning hole column. In addition, the setting of the guide groove makes it more convenient for blind installation without human observation.

[0017] The present invention further discloses an installation method for an easy-to-assemble peristaltic pump, which is used for assembling the peristaltic pump described above. The method is characterized by blind assembly using a positioning device and positioning pins provided on a roller assembly. The specific steps are as follows:

[0018] a. Drive assembly assembly installation: The motor is assembled with the drive cavity housing, the positioning device's positioning installation panel is installed in the drive cavity housing, and then the planetary gears and sun gear of the planetary gear assembly are positioned and fixed on the positioning installation panel;

[0019] b. Assemble and install the roller assembly: The roller is placed in the roller bracket and fixed by the roller shaft to form a roller assembly. The roller assembly is positioned and assembled on the positioning installation panel of the drive assembly assembled in step a. The roller assembly is blindly assembled by the radial rotation method through the positioning pin and the positioning hole set on the positioning installation panel. The method also includes inserting the drive shaft of the motor into the center hole of the roller bracket to position the roller assembly in the direction of the central axis;

[0020] c. Installation of the hose assembly and pump head shell: Install the hose assembly around the roller assembly, wrap the hose around the periphery of the roller assembly, and press the hose connector into the hose assembly fixing seat to fix it. Then snap the pump head shell onto the periphery of the roller assembly and the hose assembly, and snap it together with the drive assembly to fix it into the peristaltic pump as a whole.

[0021] Furthermore, during the installation of the hose assembly and the pump head housing in step c, the first connector of the hose assembly is first pressed into the hose assembly fixing seat on the drive assembly, and after the hose is tightened around the periphery of the roller assembly, the second connector is pressed into the fixing seat and fixed; or another installation method can be selected, when the second connector of the hose assembly is pressed in, the pump head housing is simultaneously buckled onto the drive assembly, and the peristaltic pump is synchronously assembled into a whole. During the installation of the hose assembly, the second connector is tightened while the pump head housing is buckled and assembled together, which not only saves installation time and steps, but also the instantaneous buckling prevents the hose from being loosened. In another embodiment, the pump head housing can be buckled and installed at a certain angle to the center end of the hose. Even if the hose is not tightened to fit the roller assembly and protrudes from the outer diameter of the roller bracket, it can also be easily assembled and installed without being blocked by the protruding hose.

[0022] According to the above technical scheme, the present invention provides an easy-to-assemble peristaltic pump and its installation method, which have the following beneficial effects: by arranging a positioning device between the pump head assembly and the drive assembly of the peristaltic pump, the planetary gear structure is accurately positioned and installed, and the roller assembly is firmly positioned and installed on the central axis of the drive mechanism, thereby reducing the precision requirements on the design and manufacturing materials of the micro peristaltic pump, improving the overall performance and life of the peristaltic pump, making the structure more compact, and the radial rotation of the roller assembly realizes a blind installation method that does not require visual monitoring, which is easy to install and more suitable for intelligent and automated production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the overall structure of a peristaltic pump according to a preferred embodiment of the present invention;

[0024] Figure 2 This is a schematic exploded top view of a peristaltic pump structure according to a preferred embodiment of the present invention;

[0025] Figure 3 This is an exploded bottom view of a peristaltic pump structure according to a preferred embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the half-fastened structure of the peristaltic pump structure of the best embodiment of the present invention;

[0027] Figure 5 A schematic structural diagram of an implementation scheme of a positioning device for a peristaltic pump according to a preferred embodiment of the present invention;

[0028] Figure 6 A schematic structural diagram of another embodiment of the positioning device of the peristaltic pump according to the best embodiment of the present invention;

[0029] Figure 7 A schematic structural diagram of another embodiment of the positioning device of the peristaltic pump according to the best embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the combined structure of the positioning device and roller bracket of the peristaltic pump in the best embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the combined structure of the positioning device and the planetary gear according to the best embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the exploded structure of the positioning device and the planetary gear combination according to the best embodiment of the present invention;

[0033] Figure 11 A schematic diagram of another embodiment of the peristaltic pump overall installation structure according to the best embodiment of the present invention;

[0034] Figure 12 A schematic diagram of a peristaltic pump installation method according to a preferred embodiment of the present invention;

[0035] Figure 13 A schematic diagram of a peristaltic pump installation method according to a preferred embodiment of the present invention;

[0036] Figure 14 A schematic diagram of a peristaltic pump installation method according to a preferred embodiment of the present invention;

[0037] Figure 15 A schematic diagram of a peristaltic pump installation method according to a preferred embodiment of the present invention;

[0038] Figure 16 A schematic diagram of a peristaltic pump installation method according to a preferred embodiment of the present invention;

[0039] Figure 17 A schematic diagram of a peristaltic pump installation method according to a preferred embodiment of the present invention;

[0040] Figure 18 It is a schematic diagram of the gear force in the prior art;

[0041] Figure 19 This is a schematic diagram of the force on the peristaltic pump gear in the best embodiment of the present invention. Implementation Method

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1 to 11As shown, a peristaltic pump that is easy to assemble, a micro peristaltic pump 10 for fluid transmission, includes a pump head assembly 11 and a drive assembly 12, the pump head assembly 11 includes a pump head housing 111, a roller assembly 112 and a hose assembly 113, the drive assembly 12 includes a planetary gear assembly 121, a drive chamber housing 122 and a motor 123, the drive assembly 12 rotates to drive the roller assembly 112 to squeeze the fluid in the hose assembly 113 for flow transmission, and also includes a positioning device 20, the positioning device 20 is arranged in the drive chamber housing 122 with a gear ring 1221, and a positioning column 21 for positioning the planetary gear 1211 of the planetary gear assembly 121 is provided on the gear mounting panel 23 of the positioning device 20; wherein, a positioning pin 1121 is provided on the roller bracket end panel of the roller assembly 112, which is adapted and combined with the positioning hole column 22 provided on the gear mounting panel 23 of the positioning device 20.

[0044] like Figure 1 and Figure 2 As shown in the figure, the peristaltic pump 10 realizes fluid transmission by squeezing the hose through the roller assembly 112 on the pump head. In particular, micro-peristaltic pumps have relatively high requirements on flow accuracy and lifespan. Controlling the rotation speed, squeezing angle and strength of the roller assembly is a key technical requirement in product design. Therefore, the installation and positioning of the center axis X position of the roller assembly 112 is very important, which will have a very large impact on the pressure amount, fluid pulse, and hose wear of the peristaltic pump. That is, the slight deviation of the roller assembly will greatly affect the flow rate and lifespan of the peristaltic pump. In this design, the center position of the roller assembly is located by designing a positioning device, so that the center axis position positioning, assembly and fixation can be easily and conveniently achieved during the assembly process of the peristaltic pump.

[0045] like Figure 5 As shown, the gear mounting panel 23 of the positioning device 20 is rotatably disposed on the base panel of the driving chamber housing 122 .

[0046] like Figure 6 and Figure 7 As shown in FIG, the gear mounting panel 23 of the positioning device 20 is configured as a separate accessory that is adapted to be mounted on the base surface of the drive cavity housing 122. Figure 6As shown in , the positioning column 21 and the positioning hole column 22 of the positioning device 20 are arranged to be concentric circles and evenly distributed on the surface of the gear mounting panel 23. Currently, micro peristaltic pumps are widely used and in order to save costs, all components of the peristaltic pump are made of plastic. The gears in the planetary gear assembly are also made of plastic materials. Compared with the planetary gear structure made of metal with good rigidity used in general mechanical equipment, there is a certain gap in precision. In general planetary gear transmission design, the planetary gears, sun gear and outer ring gear are directly engaged and positioned and installed, which has very high requirements on mechanical design tolerances and high rigidity requirements on the manufacturing materials. Plastic, as a low-cost material, has certain difficulties in manufacturing. The present invention positions the planetary gears in advance through the positioning column, which greatly reduces the requirements on the accuracy of the gear radius and tooth meshing, and reduces the difficulty of manufacturing and assembling the planetary gear assembly in the micro peristaltic pump.

[0047] like Figure 6 and Figure 7 As shown in the figure, the positioning posts 21 and the positioning hole posts 22 are arranged in a number that are evenly spaced apart. In a preferred embodiment, the positioning posts 21 and the positioning hole posts 22 are arranged in three evenly spaced apart groups, forming two intersecting equilateral triangles arranged on the gear mounting panel 23. The planetary gear assembly in the peristaltic pump drive assembly is fixed to the roller assembly in a stable arrangement and positioning in an evenly intersecting triangle, which firmly positions the rotation drive of the roller assembly on the central axis. This makes positioning simpler and more precise during the production and installation process, improving the overall performance of the peristaltic pump, such as flow rate and lifespan. The planetary gear assembly in the drive assembly and the roller assembly of the pump head assembly cooperate through the positioning holes 22 and the positioning posts 1121 to form a rotatable whole. A through hole 24 is provided in the middle of the mounting panel 23, and a central boss 1223 is provided on the drive chamber housing 122. The through hole 24 and the central boss 1223 form a lower end rotating pair, while the inner hole of the roller assembly and the central boss of the pump head housing 111 also form an upper end rotating pair. These two revolute pairs ensure that the roller assembly's rotational motion has a highly accurate center of rotation. Compared to peristaltic pumps where the roller assembly's lower end is limited solely by planetary gears, performance in terms of flow rate, lifespan, and noise levels are significantly improved, while production costs are reduced.

[0048] like Figure 6 and Figure 7 As shown in FIG, a through hole 24 is provided on the concentric circle surrounded by the positioning post 21 and the positioning hole post 22 of the gear mounting panel 23. The central axis of the drive rod 1231 of the motor 123 passes through the through hole 24 and is connected to the center of the sun gear 1212 of the planetary gear assembly 121 and fixed on the central axis of the concentric circle. The point of the motor shaft central axis serves as the center of the concentric circle. The sun gear and planetary gears are respectively fixed by the motor drive rod and the positioning post, reducing the respective diameters and the meshing accuracy of the teeth.

[0049] like Figure 6 As shown in FIG, in one embodiment, the inner hole of the positioning hole column 22 is configured as a cylindrical hole, and the outer hole is a triangular prism structure. The end of the cylindrical hole is provided with a guide groove. The stable structure of the triangular prism not only distinguishes it from the cylindrical positioning column in shape, providing identification during pump assembly, but also is more suitable for guiding the positioning pin of the roller assembly into the positioning hole.

[0050] like Figure 4 As shown in , the transmission rod 1231 is inserted into the center hole 1222 provided on the roller bracket for center positioning during the assembly process. In the invention, when the roller assembly 112 is installed in conjunction with the drive assembly 12, due to the action of the positioning pin 1121, the radially rotating roller assembly causes the positioning pin 1121 to slide into the positioning hole column 22, thereby achieving simple blind installation. This is more convenient to operate and very suitable for automated assembly. During the rotary blind installation process, the transmission rod of the motor is inserted into the roller bracket to first achieve radial positioning, thereby achieving more accurate positioning assembly on the central axis.

[0051] like Figure 4 As shown in , the drive assembly 12 also includes a hose assembly fixing seat 1222. The hose fixing seat is provided at the outer edge of the drive cavity shell of the drive assembly, and is used for fixing and installing the hose assembly during the assembly process of the peristaltic pump. Because the hose of the peristaltic pump is fluffy in its natural state when not installed and squeezed, when assembled around the periphery of the roller assembly and in the pump shell cavity, the hose will not only move and get stuck when not tightened, and thus cannot be installed, but is also more likely to be damaged. In the design of the present invention, one end of the hose is first fixed to the fixing seat, and then tightened around the roller assembly before installation. During the assembly process, the hose is in a tightened state, achieving quick and simple assembly. The characteristic is that when operated by an automated manipulator, the difficulty of operation is greatly reduced.

[0052] like Figure 5 and Figure 6 As shown in the figure, the inner hole of the positioning hole column 22 is configured as a cylindrical hole, and the outer periphery is a triangular prism structure. A guide groove is provided at the end of the cylindrical hole. The outer periphery of the positioning hole column is configured as a triangular prism. When the roller assembly is blindly installed with radial rotation, the positioning pin is guided and is less likely to slide into the gap between the gear and the positioning hole column. In addition, the provision of the guide groove further facilitates blind installation without human observation.

[0053] Compared with the existing design, the technical solution of the present invention also has a very beneficial effect on the gear force. Figure 18In the prior art structure, the planetary gear 3 of the planetary gear is directly fixedly connected to the sun gear 4 and the ring gear 2 on the drive housing. When the roller assembly is driven to rotate, the centripetal force F1 is directly applied to the planetary gear 3, causing the meshing of the planetary gear 3 and the ring gear 2 to generate pressure F1, thereby generating large friction and easily damaging the gears. In addition, the pressure fit causes vibration during the gear meshing process, which is unstable and produces noise. Figure 19 In the design of the present invention, the centripetal force F2 generated by the rotation of the roller assembly 113 is guided by the positioning column 21 to the bottom surface of the drive chamber housing, and the planetary gears are not subjected to radial pressure, thereby reducing damage due to pressure friction, increasing the overall life of the peristaltic pump, and having good stability, so that noise is not generated due to pressure engagement between gears.

[0054] As shown in Figure 12 to Figure 17 As shown in , the invention also discloses an installation method for an easy-to-assemble peristaltic pump, which is used for assembling the peristaltic pump, and is a blind assembly method using a positioning device and a positioning pin provided on a roller assembly. The specific steps are as follows:

[0055] a. Drive component combination installation: such as Figure 12 As shown in FIG, the motor and the drive chamber housing are assembled as step ①, the positioning installation panel of the positioning device is installed in the drive chamber housing as step ②, and then the planetary gear and the sun gear of the planetary gear assembly are positioned and fixed on the positioning installation panel as step ③; the above steps are not completely fixed, and the order can be changed or the assembly installation can be directly achieved by mechanical automation in one step;

[0056] b. Roller assembly installation: Figure 13 As shown in , the roller is placed in the roller bracket as step ④, and is fixed by the roller shaft as step ⑤, and the roller assembly is assembled; Figure 14 As shown in , the roller assembly is positioned and assembled on the positioning installation panel of the drive assembly assembled in step a, which is step ⑥. The roller assembly is blindly assembled by a radial X-direction self-rotation method through the positioning pin and the positioning hole set on the positioning installation panel; it also includes a method of inserting the drive shaft of the motor into the center hole of the roller bracket to position the roller assembly in the direction of the central axis;

[0057] c. Installation of hose assembly and pump head shell: Figure 15 As shown in the figure, the hose assembly is installed around the roller assembly in step 7, the hose is wrapped around the roller assembly in the Y direction, and the hose connector is pressed into the hose assembly holder to secure it. The pump head housing is then snapped onto the roller assembly and hose assembly in step 8a or 8b, and the drive assembly is snapped together to form the peristaltic pump. In a typical structure, the hose assembly holder is located on the side of the drive chamber housing, and the clip that secures the pump head housing to the drive assembly is located on the other side of the drive chamber housing. This facilitates staggered structural design and is also suitable for plug-in connections in actual fluid transmission applications.

[0058] like Figure 15 and Figure 17 As shown in FIG, during the installation of the hose assembly and the pump head housing in step c, first press the first connector of the hose assembly into the hose assembly fixing seat on the drive assembly, tighten the hose around the outer periphery of the roller assembly, and then press the second connector into the fixing seat to fix it; Figure 17 As shown in , another installation method can be selected. When the second connector of the hose assembly is pressed into place, the pump head housing is simultaneously buckled onto the drive assembly, and the peristaltic pump is assembled into a whole in step ⑧b. During the installation of the hose assembly, the second connector is pressed and tightened while the pump head housing is buckled and assembled together. This not only saves installation time and steps, but also the instantaneous buckling prevents the hose from being loosened. In another embodiment, the pump head housing can be buckled and installed at a certain angle to the center end of the hose. Even if the hose is not tightened to fit the roller assembly and protrudes from the outer diameter of the roller bracket, it can still be easily assembled and installed without being blocked by the protruding hose.

[0059] The above is one embodiment of the present invention. In addition, it should be noted that any equivalent or simple changes made based on the structure, features and principles described in this patent are included in the scope of protection of this patent.

Claims

1. An easily assembled peristaltic pump, comprising a pump head assembly (11) and a drive assembly (12), wherein the pump head assembly (11) comprises a pump head housing (111), a roller assembly (112) and a hose assembly (113), wherein the drive assembly (12) rotates to drive the roller assembly (112) to squeeze the fluid in the hose assembly (113) for flow transmission, characterized in that: The invention also includes a positioning device (20), wherein the driving assembly (12) includes a planetary gear assembly (121) and a driving cavity housing (122), and the positioning device (20) is arranged in the driving cavity housing (122) with a gear ring (1221). The gear mounting panel (23) of the positioning device (20) is rotatably arranged on the base panel of the driving cavity housing (122), and the gear mounting panel (23) is provided with a positioning column (21) for positioning the planetary gear (1211) of the planetary gear assembly (121); a positioning pin (1121) is provided on the roller bracket end panel of the roller assembly (112), and the positioning pin (1121) is adapted to be combined and fixed with a positioning hole column (22) provided on the gear mounting panel (23).

2. The easily assembled peristaltic pump according to claim 1, characterized in that: The positioning columns (21) and positioning hole columns (22) are arranged in a number that is evenly spaced from each other, and the positioning columns (21) and positioning hole columns (22) are arranged in a concentric circle and evenly distributed on the gear mounting panel (23).

3. The easily assembled peristaltic pump according to claim 2, characterized in that: The positioning columns (21) and positioning hole columns (22) are arranged in three evenly spaced arrangements, forming two intersecting equilateral triangles arranged on the gear mounting panel (23).

4. The easily assembled peristaltic pump according to claim 2, characterized in that: A through hole (24) is provided on the concentric circle surrounded by the positioning column (21) and the positioning hole column (22) of the gear mounting panel (23); the central axis of the transmission rod (1231) of the motor (123) passes through the through hole (24) and is centrally connected to the sun gear (1212) of the planetary gear assembly (121) and fixed on the central axis of the concentric circle.

5. The easily assembled peristaltic pump according to claim 4, characterized in that: The transmission rod (1231) is inserted into the center hole provided on the roller bracket for center positioning during the assembly process.

6. The easily assembled peristaltic pump according to claim 1, characterized in that: The drive assembly (12) further comprises a hose assembly fixing seat (1222).

7. The easily assembled peristaltic pump according to claim 1, characterized in that: The inner hole of the positioning hole column (22) is set as a cylindrical hole, the outer periphery is a triangular column structure, and a guide groove is set at the end of the cylindrical hole.

8. An installation method for an easy-to-assemble peristaltic pump, used for assembling a peristaltic pump according to any one of claims 1 to 7, characterized in that The assembly method for blind installation using the positioning device and the positioning pins provided on the roller assembly is as follows: a. Drive assembly assembly installation: The motor is assembled with the drive chamber housing, the gear mounting panel of the positioning device is installed in the drive chamber housing, and the planetary gears and sun gear of the planetary gear assembly are positioned and fixed to the gear mounting panel; b. Assemble and install the roller assembly: The roller is placed in the roller bracket and fixed by the roller shaft to form a roller assembly. The roller assembly is positioned and assembled on the gear mounting panel of the drive assembly assembled in step a. The roller assembly is blindly assembled by radial self-rotation method using the positioning pins and the positioning holes set on the gear mounting panel; c. Installation of the hose assembly and pump head shell: Install the hose assembly around the roller assembly, wrap the hose around the periphery of the roller assembly, and press the hose connector into the hose assembly fixing seat to fix it. Then snap the pump head shell onto the periphery of the roller assembly and the hose assembly, and snap it together with the drive assembly to fix it into the peristaltic pump as a whole.

9. The method for installing an easy-to-assemble peristaltic pump according to claim 8, characterized in that During the installation of the hose assembly and pump head shell in step c, the first connector of the hose assembly is first pressed into the hose assembly fixing seat on the drive assembly, the hose is tightened and wrapped around the periphery of the roller assembly, and then the second connector is pressed into the hose assembly fixing seat; or another installation method can be selected, when the second connector of the hose assembly is pressed in, the pump head shell is simultaneously buckled onto the drive assembly, and the peristaltic pump is synchronously assembled into a whole.

Images