Peristaltic assembly and peristaltic pump

Abstract

The utility model provides a peristaltic component and peristaltic pump, wherein the peristaltic component comprises a plurality of rollers, a plurality of planetary gears, a sun gear and a fixed support with double-layer mounting space, the upper-layer mounting space of the fixed support is used for mounting the plurality of rollers, and the lower-layer mounting space of the fixed support is used for mounting the plurality of planetary gears. The planetary gears are axially connected with the roller, are distributed on the periphery of the sun gear and are in meshed connection with the sun gear; in addition, the utility model further provides a peristaltic pump comprising the peristaltic assembly, the peristaltic pump further comprises a pump cover, a gear ring, a driving motor and a hose, the peristaltic assembly is installed in a containing space formed by the pump cover and the gear ring, the planetary gear is firstly installed on the fixing support and then placed in the gear ring, the installation difficulty of the planetary gear is reduced, and the installation efficiency is improved. The planetary gear can be effectively prevented from falling off in the installation process, and therefore the assembly efficiency is improved.

Description

Technical Field

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

[0002] As a special pumping device, a peristaltic pump squeezes a rotating part inside the pump to rotate, thereby squeezing a hose to convey fluid. The periodic squeezing of the hose forces the fluid to move. However, the assembly process of the peristaltic pump is often complex.

[0003] During the assembly of the peristaltic pump, the pump cover is opened to expose the internal structure of the pump head. First, the planetary gears are installed in the ring gear and meshed with the ring gear, and then the sun gear is installed on the output shaft of the motor. Among them, the planetary gears are arranged around the sun gear, and the periphery of the sun gear meshes with the planetary gears; further, rollers are installed on the planetary gears to squeeze the hose. During the assembly process, the ring gear needs to be flipped to install the planetary gears. However, flipping the ring gear may cause the planetary gears to fall off from the preset positions; after the planetary gears are embedded in the ring gear, a jig (the jig is a fixing part in the peristaltic pump assembly process to ensure accurate installation) needs to be withdrawn. During the process of withdrawing the jig, friction occurs between the jig and the planetary gears. If the pulling is improper, the jig may carry out the planetary gears, resulting in assembly failure. Therefore, the installation steps are difficult and require a lot of time for the installers. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a peristaltic assembly and a peristaltic pump, which improve the installation method of the planetary gears, reduce the assembly difficulty and improve the assembly efficiency.

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

[0006] A peristaltic assembly includes: a plurality of rollers; a plurality of planetary gears axially connected to the rollers respectively; a sun gear; when the sun gear is rotated by an external force, the sun gear drives the plurality of planetary gears to rotate, and the plurality of planetary gears drive the plurality of rollers to rotate; a fixed bracket with a double-layer installation space, the upper installation space of the fixed bracket is used to install the plurality of rollers, the lower installation space of the fixed bracket is used to install the plurality of planetary gears and the sun gear, the planetary gears are distributed on the outer periphery of the sun gear and are meshed and connected with the sun gear; when the sun gear is driven to rotate, the planetary gears drive the rollers to rotate.

[0007] In a preferred embodiment, the fixed bracket is provided with a plurality of support plates, and the plurality of support plates divide the fixed bracket into an upper installation space and a lower installation space; the plurality of rollers and the plurality of planetary gears are respectively placed into the corresponding support plates from the side of the fixed bracket.

[0008] In a preferred embodiment, it further includes a plurality of connecting shafts; a plurality of perforations are provided on the support plate, and the connecting shafts vertically penetrate downward through the plurality of perforations from above to fix the rollers and the planetary gears.

[0009] In a preferred embodiment, a first support column is provided at the center of the upper installation space of the fixed bracket, a notch matching the shape of the roller is provided on the body of the first support column, and the plurality of rollers are fixed around the first support column.

[0010] In a preferred embodiment, a plurality of second support columns are provided in the lower installation space of the fixed bracket, and an accommodation space for accommodating a plurality of planetary gears is formed between two adjacent second support columns.

[0011] In a preferred embodiment, a receiving cavity for receiving the sun gear is provided at the center of the bottom of the fixed bracket, and the sun gear is located in the receiving cavity and meshes with a plurality of planetary gears.

[0012] In addition, the present utility model further provides a peristaltic pump including any one of the above peristaltic components, and further includes a pump cover, a ring gear, a driving motor and a hose; the plurality of planetary gears are meshed with the ring gear; an output shaft is provided on the driving motor, the sun gear is fixed on the output shaft, and when the driving motor is started, the output shaft drives the sun gear to rotate; the driving motor is connected below the ring gear, the hose and the peristaltic component are arranged in the accommodation space formed by the pump cover and the ring gear, and the hose surrounds the outside of the roller.

[0013] In a preferred embodiment, a positioning hole is provided at the top of the fixed bracket, and a first fixing portion is correspondingly provided on the pump cover. When installing the pump cover, the first fixing portion is clamped with the positioning hole.

[0014] In a preferred embodiment, an output shaft is provided on the driving motor, the sun gear is fixed on the output shaft, and when the driving motor is started, the output shaft drives the sun gear to rotate.

[0015] In a preferred embodiment, both ends of the hose are connected with pipe joints, and two guiding grooves are provided in the accommodation space formed by the pump cover and the ring gear. The hose is inserted from one end of the guiding groove and wound around the outside of the peristaltic component and taken out from the other guiding groove.

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] The peristaltic component of the present utility model includes a plurality of rollers, a plurality of planetary gears, a sun gear, and a fixed bracket. The fixed bracket has a double-layer installation space. During installation, a plurality of rollers are placed on the upper layer of the installation space, and a plurality of planetary gears are placed on the lower layer of the installation space. Then, the planetary gears and the rollers are axially connected. The sun gear is arranged at a predetermined position and meshes with the plurality of planetary gears. After the planetary gears and the rollers are both installed on the fixed bracket, the fixed bracket is installed at the corresponding position. Compared with the prior art in which the planetary gears are first placed in the predetermined position and then the rollers are fixed to the planetary gears, the present utility model improves the fixing method of the planetary gears. First, the planetary gears are installed in the fixed bracket, and then the planetary gears are assembled with the rollers. At this time, the stable installation of the planetary gears can be ensured. When placed in the predetermined position later, it can be ensured that the planetary gears do not fall off from the predetermined position during this process. The fixed bracket can well fix the planetary gears, avoiding the installation failure caused by the dropping of the planetary gears during the installation process.

[0018] This peristaltic component is applied to a peristaltic pump. The peristaltic pump includes a pump cover, a ring gear, a driving motor, the above-mentioned peristaltic component, and a hose. During installation, the sun gear in the peristaltic component is first fixed on the driving motor; first, the planetary gears and the rollers of the peristaltic component are installed on the fixed bracket, then the fixed bracket is placed inside the ring gear, and the sun gear meshes with the plurality of planetary gears. The hose is wound around the outside of the rollers of the peristaltic component, and finally the pump cover is covered to complete the installation. The staff can first fix the planetary gears with other components in the external environment and then place the whole inside the ring gear, avoiding the falling off of the planetary gears from the preset position during the assembly process, reducing the installation difficulty, and improving the installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is an exploded view of the peristaltic component of the present utility model;

[0021] Figure 2 It is a schematic diagram of the fixed bracket in the peristaltic component of the present utility model.

[0022] Figure 3 It is an exploded view of the peristaltic pump of the present utility model;

[0023] Figure 4 It is a schematic diagram of the pump cover in the peristaltic pump of the present utility model.

[0024] REFERENCE SIGNS

[0025] 1 - Pump cover; 11 - First fixing part; 12 - Guide groove;

[0026] 2 - Ring gear;

[0027] 3 - Driving motor; 31 - Output shaft;

[0028] 4 - Fixed bracket; 4a - Upper mounting space; 4b - Lower mounting space;

[0029] 41 - Mounting plate; 41a - Perforation; 41b - Accommodation cavity; 41c - Positioning hole;

[0030] 42 - First support column; 42a - Notch; 43 - Second support column;

[0031] 5 - Roller;

[0032] 6 - Planet gear;

[0033] 7 - Sun gear;

[0034] 8 - Hose;

[0035] 9 - Connecting shaft;

[0036] 10 - Pipe joint. Detailed implementation manners

[0037] 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.

[0038] 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 cannot be understood 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 understood as indicating or implying relative importance.

[0039] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. 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 circumstances.

[0040] See Figures 1 to 4 , an embodiment of the present utility model discloses a peristaltic assembly and a peristaltic pump. Among them, the peristaltic assembly includes a plurality of rollers 5, a plurality of planetary gears 6, a sun gear 7, and a fixed bracket 4; specifically, the planetary gears 6 are axially connected to the rollers 5 respectively. When the sun gear 7 is rotated by an external force, the sun gear 7 drives a plurality of planetary gears 6 to rotate, and the plurality of planetary gears 6 drive a plurality of rollers 5 to rotate. Further, the fixed bracket 4 has a double-layer installation space. During installation, first place the rollers 5 and the planetary gears 6 on the fixed bracket 4. The upper installation space 4a of the fixed bracket 4 is used to install a plurality of rollers 5, and the lower installation space 4b of the fixed bracket 4 is used to install a plurality of planetary gears 6 and the sun gear 7. The planetary gears 6 are distributed on the outer periphery of the sun gear 7 and are meshed and connected to the sun gear 7. When the sun gear 7 rotates, the planetary gears 6 drive the rollers 5 to rotate. During the process of assembling the peristaltic pump, the difficulty of assembling the peristaltic assembly is relatively large and it is not easy to install. In the prior art, the planetary gears 6 and the rollers 5 are installed step by step: first place the planetary gears 6 in the predetermined positions, and then install a plurality of rollers 5 on the plurality of planetary gears 6 to axially connect the planetary gears 6 and the rollers 5; among them, the sun gear 7 is located in the middle of the plurality of planetary gears 6 and is meshed with the plurality of planetary gears 6. During the above installation process, during installation, it is necessary to ensure that the planetary gears 6 are fixed, the planetary gears 6 are meshed with the sun gear 7, and the planetary gears 6 are aligned with the rollers 5. Since each component is relatively small, it is very easy to fall off during assembly, resulting in assembly failure.

[0041] Therefore, the present utility model provides a fixed bracket 4 with a double-layer structure, which can first assemble the planetary gears 6 and the rollers 5 on the fixed bracket 4 and axially connect them, and then place the whole in the predetermined position. It is equivalent to fixing the planetary gears 6 before placing them in the predetermined position, avoiding the planetary gears 6 falling off from the preset positions during the assembly process, reducing the installation difficulty, and improving the installation efficiency.

[0042] Further, the fixed bracket 4 is provided with a plurality of support plates 41. The plurality of support plates 41 divide the fixed bracket 4 into an upper installation space 4a and a lower installation space 4b. During installation, a plurality of rollers 5 and a plurality of planetary gears 6 are respectively placed into the corresponding support plates 41 from the side of the fixed bracket 4; first install the planetary gears 6 and the rollers 5 on the fixed bracket 4 to reduce the subsequent assembly difficulty.

[0043] Further, it further includes a plurality of connecting shafts 9. A plurality of through holes 41a are provided on the support plate 41. The connecting shafts 9 vertically pass through the plurality of through holes 41a from top to bottom to fix the rollers 5 and the planetary gears 6. Specifically, the planetary gears 6 and the rollers 5 are in one-to-one correspondence and axially connected. A plurality of through holes 41a are provided at the positions where the mounting plate 41 fixes the planetary gears 6 and the rollers 5. When the planetary gears 6 and the rollers 5 are respectively placed in the fixing bracket 4, the plurality of connecting shafts 9 pass through the through holes 41a to fix the planetary gears 6 and the rollers 5.

[0044] Further, the material of the connecting shaft 9 is preferably an alloy.

[0045] Further, a first support column 42 is provided at the center of the upper mounting space 4a of the fixing bracket 4. As Figure 1 and Figure 2 shown, a notch 42a matching the shape of the roller 5 is provided on the body of the first support column 42. When installing the roller 5, a plurality of rollers 5 are fixed around the first support column 42, and the notch 42a helps to position the roller 5 without deviation.

[0046] Further, a plurality of second support columns 43 are provided in the lower mounting space 4b of the fixing bracket 4 to support the lower mounting space 4b to a certain height. An accommodation space for accommodating a plurality of planetary gears 6 is formed between two adjacent second support columns 43. Each accommodation space houses one planetary gear 6, and the position where the planetary gear 6 is located corresponds to the roller 5 in the upper mounting space 4a one by one.

[0047] Further, a receiving cavity 41b for receiving the sun gear 7 is provided at the center of the bottom of the fixing bracket 4. The sun gear 7 is located in the receiving cavity 41b and is meshed with a plurality of planetary gears 6.

[0048] In addition, the present utility model also provides a peristaltic pump, which includes a pump cover 1, a gear ring 2, a drive motor 3, a peristaltic assembly, and a hose 8. Specifically, the drive motor 3 is connected below the gear ring 2, and the hose 8 and the peristaltic assembly are arranged in the accommodation space formed by the pump cover 1 and the gear ring 2, and the hose 8 surrounds the outside of the roller 5. When the fixing bracket 4 is placed in the accommodation space formed by the pump cover 1 and the gear ring 2, the lower layer of the fixing bracket 4 coincides with the gear ring 2, and the upper layer of the fixing bracket 4 coincides with the pump cover 1. The planetary gear 6 is placed on the lower layer of the fixing bracket 4, the gear ring 2 is provided with an internal gear, and the planetary gear 6 meshes with the internal gear of the gear ring 2. When installing the peristaltic pump of the present utility model, first install the planetary gear 6 and the roller 5 on the fixing bracket 4 and axially connect them with the connecting shaft 9. After the planetary gear 6 and the roller 5 are fixed, then place the entire fixing bracket 4 into the gear ring 2 to prevent the planetary gear 6 from falling off during the assembly process and reduce the assembly difficulty. At this time, the planetary gear 2 meshes with the gear ring 2. After covering the pump cover 1, the installation is completed. The existing method for installing a peristaltic pump is as follows: First, install the planetary gear 6 in the gear ring 2, and then fix the roller 5 to the planetary gear 6. During this period, the jig (a part used for fixing during the assembly process of the peristaltic pump) rubs against the planetary gear 6, and the jig may carry out the planetary gear 6, resulting in assembly failure. Compared with the existing installation method of installing the planetary gear 6 in the gear ring 2 first and then fixing the roller 5 to the planetary gear 6, the present utility model first fixes the planetary gear 6 and the roller 5 outside the gear ring 2 and then assembles the planetary gear 6 and the roller 5 into the corresponding positions, reducing the assembly difficulty.

[0049] Further, the drive motor 3 is provided with an output shaft 31, and the sun gear 7 is fixed on the output shaft 31. When the drive motor 3 is started, the output shaft 31 drives the sun gear 7 to rotate. During installation, first install a plurality of planetary gears 6 and a plurality of rollers 5 on the fixing bracket 4 and axially connect the planetary gear 6 and the roller 5 with the connecting shaft 9, and place the fixing bracket 4 into the gear ring 2. Further, the sun gear 7 is fixed to the output shaft 31, and the gear ring 2 is fixed to the drive motor 3. Among them, the output shaft 31 is inserted into the gear ring 2, and the accommodation cavity 41b provided at the bottom of the fixing bracket 4 is used to accommodate the sun gear 7, so that the sun gear 7 meshes with a plurality of planetary gears 6.

[0050] Further, as Figure 4 shown, the top of the fixing bracket 4 is provided with a positioning hole 41c, and the pump cover 1 is correspondingly provided with a first fixing portion 11. After the fixing bracket 4 is placed in the gear ring 2 and the pump cover 1 is covered, the first fixing portion 11 on the pump cover 1 is clamped with the positioning hole 41c at the top of the fixing bracket 4, making the installation of the fixing bracket 4 more stable.

[0051] Further, pipe connectors 10 are connected to both ends of the hose 8. The pipe connectors 10 are tightly connected to the hose 8 to ensure a sealed environment. There are two guide grooves 12 in the accommodation space formed by the pump cover 1 and the ring gear 2. The hose 8 is inserted from one end of the guide groove 12 and exits from the other guide groove around the outside of the peristaltic assembly, forming a closed circulation path. When the peristaltic assembly rotates, the rollers 5 sequentially squeeze along the outer surface of the hose 8. As the rollers move, the hose returns to its original state. The process of the rollers 5 rotating and squeezing the hose 8 causes the liquid inside the hose 8 to advance forward, flowing from the inlet end to the outlet end of the hose 8, realizing the directional transmission of the liquid.

[0052] When the peristaltic pump of the present utility model works, the driving motor 3 is started, the output shaft 31 on the driving motor 3 rotates, the output shaft 31 drives the sun gear 7 to rotate, and the sun gear 7 drives several planetary gears 6 to rotate. Since several planetary gears 6 are meshed with the internal gear of the ring gear 2, several planetary gears 6 rotate in a circle inside the ring gear 2; further, several planetary gears 6 drive several rollers 5 to rotate in a circle, and the entire peristaltic assembly rotates in the accommodation space formed by the pump cover 1 and the ring gear 2. Several rollers 5 squeeze the hose 8, enabling the liquid to achieve directional transmission inside the hose 8.

[0053] Compared with the prior art method of first placing the planetary gears in a predetermined position and then fixing the rollers to the planetary gears, the present utility model improves the installation method of the planetary gears. A fixed bracket 4 with a double-layer installation space is provided. During installation, several rollers 5 are placed in the upper installation space 4a of the fixed bracket 4, and several planetary gears 6 are placed in the lower installation space 4b of the fixed bracket 4, and the corresponding planetary gears 6 and rollers 5 up and down are axially connected using the connecting shaft 9. After the peristaltic assembly is externally installed, the peristaltic assembly is then placed inside the ring gear 2, reducing the assembly difficulty and improving the assembly efficiency.

[0054] 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 principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A peristaltic component, characterized in that, The peristaltic assembly includes: A plurality of rollers (5); A plurality of planetary gears (6), and the planetary gears (6) are axially connected to the rollers (5) respectively; A sun gear (7); When the sun gear (7) is rotated by an external force, the sun gear (7) drives the plurality of planetary gears (6) to rotate, and the plurality of planetary gears (6) drive the plurality of rollers (5) to rotate; A fixed bracket (4) having a double-layer installation space, the upper installation space (4a) of the fixed bracket (4) is used to install the plurality of rollers (5), the lower installation space (4b) of the fixed bracket (4) is used to install the plurality of planetary gears (6) and the sun gear, the planetary gears (6) are distributed on the outer periphery of the sun gear (7) and are meshed and connected with the sun gear (7); When driving the sun gear (7) to rotate, the planetary gears (6) drive the rollers (5) to rotate.

2. The peristaltic assembly according to claim 1, wherein, The fixed bracket (4) is provided with a plurality of longitudinally distributed support plates (41), and the plurality of support plates (41) divide the fixed bracket (4) into an upper installation space (4a) and a lower installation space (4b).

3. The peristaltic assembly according to claim 2, wherein, It further includes a plurality of connecting shafts (9); a plurality of through holes (41a) are provided on the support plates (41), and the connecting shafts (9) vertically pass through the plurality of through holes (41a) downward from above to fix the rollers (5) and the planetary gears (6).

4. A peristaltic component according to claim 1, characterized in that A first support column (42) is provided at the center of the upper installation space (4a) of the fixed bracket (4), a notch (42a) matching the shape of the roller (5) is provided on the body of the first support column (42), and the plurality of rollers (5) are fixed around the first support column (42).

5. The peristaltic assembly according to claim 1, characterized in that, A plurality of second support columns (43) are provided in the lower installation space (4b) of the fixed bracket (4), and an accommodation space for accommodating the plurality of planetary gears (6) is formed between two adjacent second support columns (43).

6. The peristaltic component according to claim 1, wherein An accommodation cavity (41b) for accommodating the sun gear (7) is provided at the center of the bottom of the fixed bracket (4), and the sun gear (7) is located in the accommodation cavity (41b) and is meshed and connected with the plurality of planetary gears (6).

7. A peristaltic pump, characterized in that, It includes the peristaltic assembly according to any one of claims 1 to 6, and further includes a pump cover (1), a ring gear (2), a drive motor (3) and a hose (8); the plurality of planetary gears (6) are meshed and connected with the ring gear (2); an output shaft (31) is provided on the drive motor (3), the sun gear (7) is fixed on the output shaft (31), and when the drive motor (3) is started, the output shaft (31) drives the sun gear (7) to rotate; The ring gear (2) is connected to the drive motor (3) below, the hose (8) and the peristaltic assembly are arranged in the accommodation space formed by the pump cover (1) and the ring gear (2), and the hose (8) surrounds the outside of the rollers (5).

8. A peristaltic pump according to claim 7, characterized in that, A positioning hole (41c) is provided at the top of the fixed bracket (4), and the pump cover (1) is correspondingly provided with a first fixing portion (11). When installing the pump cover (1), the first fixing portion (11) is snap-connected with the positioning hole (41c).

9. A peristaltic pump according to claim 7, characterized in that, Both ends of the hose (8) are connected to pipe connectors (10). Two guiding grooves (12) are provided in the accommodation space formed by the pump cover (1) and the gear ring (2). The hose (8) is inserted from one end of the guiding groove (12) and is led out from the other guiding groove (12) after winding around the outside of the peristaltic assembly.

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