An adjustable peristaltic pump

Abstract

This utility model relates to an adjustable peristaltic pump, including a motor base. A housing is provided on one side of the motor base, and the housing and the motor base form a mounting cavity. A roller assembly is rotatably mounted in the mounting cavity. The roller assembly includes a connecting shaft, with outer turntables at both ends of the connecting shaft. Several arc-shaped grooves are formed on the outer turntables. A connecting sleeve is fitted around the outside of the connecting shaft, with inner turntables at both ends of the connecting sleeve. Several straight grooves are formed on the inner turntables along the radial direction of the inner turntables, and the arc-shaped grooves intersect with the straight grooves. A roller is positioned between two inner turntables, with the roller's shaft passing through the straight grooves and extending into the arc-shaped grooves. By adjusting the relative positions of the inner and outer turntables, the intersection position of the straight and arc-shaped grooves can be adjusted, thereby adjusting the roller position. Furthermore, the roller shaft is fixed by the inner and outer turntables, improving the stability of the roller and ensuring the accuracy of the peristaltic pump.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pump technology, and in particular to an adjustable peristaltic pump. Background Technology

[0002] During the operation of a peristaltic pump, the gap between the roller and the hose pressure plate affects the performance of the peristaltic pump. If the gap is too large, it will affect the pumping effect, while if the gap is too small, it will easily cause wear on the hose and reduce the service life of the hose.

[0003] In response, researchers have developed peristaltic pump structures with adjustable gaps, such as the peristaltic pump with adjustable pressure tube gap disclosed in invention patent CN114278543B and the peristaltic pump disclosed in utility model patent CN215370188U. However, existing peristaltic pumps with adjustable gaps adjust the roller gap through a rod-shaped adjustment mechanism, resulting in poor roller stability during use and reducing the accuracy of the peristaltic pump.

[0004] Based on the above-mentioned technical problems, this application proposes an adjustable peristaltic pump. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable peristaltic pump to solve the technical problems mentioned in the background art. This purpose is achieved through the following technical solution:

[0006] An adjustable peristaltic pump includes a motor base, a motor mounted on one side of the motor base, and a housing mounted on the side of the motor base away from the motor. Two connectors are mounted on the housing. The housing and the motor base form an installation cavity. A roller assembly is rotatably mounted within the installation cavity. A flexible hose is provided between the roller assembly and the inner wall of the installation cavity, with both ends of the hose connected to the connectors. The roller assembly includes a connecting shaft, which is fixedly connected to the output shaft of the motor. Outer turntables are mounted at both ends of the connecting shaft, and each outer turntable has several arc-shaped grooves. A connecting sleeve is fitted around the outside of the connecting shaft, and inner turntables are mounted at both ends of the connecting sleeve. Each inner turntable has several straight grooves, the number of which equals the number of arc-shaped grooves. The straight grooves are arranged along the radius of the inner turntables, and the arc-shaped grooves intersect with the straight grooves. A roller is positioned between two inner turntables, with a roller shaft passing through its center. The roller shaft passes through the straight grooves and extends into the arc-shaped grooves. The width of both the straight grooves and the width of the arc-shaped grooves are equal to the diameter of the roller shaft.

[0007] Furthermore, the outer turntable includes a first outer turntable and a second outer turntable. The first outer turntable is fixed to one end of the connecting shaft, and a connecting hole is opened in the center of the first outer turntable. The output shaft of the motor is fixedly connected to the connecting hole. A first locking groove is opened on the second outer turntable, and a first locking block is provided at one end of the connecting shaft near the second outer turntable. The first locking block is interference-fitted into the first locking groove.

[0008] Furthermore, the center of the second outer turntable has a first threaded hole into which the connecting shaft extends, and a clamping block is screwed into the first threaded hole.

[0009] Furthermore, the inner turntable includes a first inner turntable and a second inner turntable. The first inner turntable is fixed to one end of the connecting sleeve. A second snap-fit ​​groove is provided on the second inner turntable. A second snap-fit ​​block is provided at one end of the connecting sleeve near the second inner turntable. The second snap-fit ​​block is interference-fitted into the second snap-fit ​​groove.

[0010] Furthermore, a second threaded hole is provided on the connecting sleeve, and a set screw is screwed into the second threaded hole.

[0011] Furthermore, the outer turntable has scale lines around its perimeter, and the inner turntable has indicator arrows around its perimeter, with the indicator arrows pointing to the scale lines.

[0012] The technical solutions provided in this application have at least the following technical effects or advantages:

[0013] 1. By adjusting the relative positions of the inner and outer turntables, the intersection position of the straight groove and the arc groove can be adjusted, thereby adjusting the position of the roller; and the roller is fixed by the inner and outer turntables, which improves the stability of the roller and ensures the accuracy of the peristaltic pump.

[0014] 2. By setting the clamping block and the set screw, the inner and outer turntables can be relatively fixed, avoiding changes in the position of the rollers during operation and ensuring the reliability of the peristaltic pump;

[0015] 3. By setting the indicator arrows and scale lines, the accuracy of roller position adjustment can be improved, thus improving the accuracy of the peristaltic pump. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the peristaltic pump structure according to an embodiment of this application;

[0018] Figure 2 This is an exploded view of the roller assembly according to an embodiment of this application;

[0019] Figure 3 This is a schematic diagram illustrating the connection between the connecting sleeve and the inner turntable in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram illustrating the connection between the connecting shaft and the outer turntable in an embodiment of this application.

[0021] Figure 5 This is a schematic diagram showing the connection between the roller and the inner turntable in an embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the roller assembly structure according to an embodiment of this application;

[0023] Figure 7 This is a schematic diagram showing the roller in the outermost position according to an embodiment of this application;

[0024] Figure 8 This is a schematic diagram of the roller being located at the innermost position in an embodiment of this application.

[0025] Reference numerals: 1. Motor base; 2. Motor; 3. Housing; 4. Roller assembly; 41. Connecting shaft; 411. First snap-fit ​​block; 412. First threaded hole; 42. First outer turntable; 421. Connecting hole; 422. Scale line; 43. Second outer turntable; 431. First snap-fit ​​groove; 432. Through hole; 44. Connecting sleeve; 441. Second snap-fit ​​block; 442. Second threaded hole; 45. First inner turntable; 451. Indicating arrow; 46. Second inner turntable; 461. Second snap-fit ​​groove; 47. Roller; 471. Roller shaft; 4a. Arc groove; 4b. Straight groove; 5. Flexible hose; 6. Connector. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] like Figure 1 An adjustable peristaltic pump is shown, comprising a motor base 1, a motor 2 fixed to the right side of the motor base 1 by screws, and a housing 3 fixed to the left side of the motor base 1. The housing 3 and the motor base 1 form a mounting cavity, and the output shaft of the motor 2 extends into the mounting cavity. Both the motor base 1 and the housing 3 are injection molded parts. Two connectors 6 are fixed to the lower end of the housing 3, and the housing 3 is fixedly connected to the motor base 1 by clips. The mounting cavity includes a cylindrical portion coaxial with the motor 2 and a rectangular portion located at the lower end of the cylindrical portion. The connectors 6 are located at the bottom of the rectangular portion. A roller assembly 4 is rotatably mounted inside the cylindrical portion of the mounting cavity, and the roller assembly 4 is coaxially arranged with the cylindrical portion. A flexible hose 5 is installed between the roller assembly 4 and the inner wall of the housing 3, and both ends of the flexible hose 5 are connected to the connectors 6. In use, the motor 2 drives the roller assembly 4 to rotate, and the roller assembly 4 compresses the flexible hose 5, thereby pumping the medium inside the flexible hose 5. The specific structure and principle of the peristaltic pump are existing technologies and will not be described in detail here.

[0028] like Figure 1 , Figure 2 , Figure 4 , Figure 6 As shown, the roller assembly 4 includes a connecting shaft 41. A first outer turntable 42 is fixedly installed at the lower end of the connecting shaft 41, and a second outer turntable 43 is assembled at the upper end of the connecting shaft 41. The first outer turntable 42 and the second outer turntable 43 are both arranged coaxially with the connecting shaft 41. Three arc-shaped grooves 4a are respectively opened on the first outer turntable 42 and the second outer turntable 43. The three arc-shaped grooves 4a are evenly arranged on a construction circle with the axis of the connecting shaft 41 as the center.

[0029] The first outer turntable 42 has a connecting hole 421 at its center. The output shaft of the motor 2 is fixedly connected to the roller assembly 4 through the connecting hole 421 to drive the roller assembly 4 to rotate. Three first locking blocks 411 are fixed at the upper end of the connecting shaft 41. The second outer turntable 43 has a first locking groove 431 at its center. The first locking blocks 411 are interference-fitted into the first locking groove 431 to achieve a fixed connection between the second outer turntable 43 and the connecting shaft 41.

[0030] Preferably, the center of the second outer turntable 43 is provided with a through hole 432, the upper end of the connecting shaft 41 is provided with a first threaded hole 412, and a clamping block 48 is installed on the outer end face of the second outer turntable 43. The lower end of the clamping block 48 passes through the through hole 432 and is screwed into the first threaded hole 412 to press the second outer turntable 43 against the connecting shaft 41.

[0031] like Figure 2 , Figure 3 , Figure 6 As shown, a connecting sleeve 44 is fitted onto the outer side of the connecting shaft 41. A first inner turntable 45 is fixedly installed at the lower end of the connecting sleeve 44, and a second inner turntable 46 is fitted onto the upper end of the connecting sleeve 44. Both the first inner turntable 45 and the second inner turntable 46 are fitted onto the connecting shaft 41, and the outer end faces of the first inner turntable 45 and the second inner turntable 46 abut against the inner end faces of the first outer turntable 42 and the second outer turntable 43, respectively. Three straight grooves 4b are respectively formed on the first inner turntable 45 and the second inner turntable 46, and the three straight grooves 4b are evenly arranged on a construction circle centered on the axis of the connecting shaft 41. Three arc-shaped grooves 4a intersect the three straight grooves 4b, and the outer ends of the arc-shaped grooves 4a and the straight grooves 4b are on the same construction circle, as are the inner ends of the arc-shaped grooves 4a and the straight grooves 4b.

[0032] Three second locking blocks 441 are fixed to the upper end of the connecting sleeve 44. Three second locking grooves 461, which mate with the second locking blocks 441, are opened at the center of the second inner turntable 46. The second locking blocks 441 are interference-fitted into the second locking grooves 461, thus achieving a fixed connection between the second inner turntable 46 and the connecting sleeve 44. Preferably, a second threaded hole 442 is opened on the side of the connecting sleeve 44, and a set screw (not shown) is screwed into the second threaded hole 442. The set screw can fix the connecting sleeve 44 to the connecting shaft 41, thereby achieving relative fixation of the positions of the arc-shaped groove 4a and the straight groove 4b.

[0033] By using clamping blocks and set screws, the inner and outer turntables can be relatively fixed, preventing the roller positions from changing during operation and ensuring the reliability of the peristaltic pump.

[0034] like Figure 2 , Figure 5 , Figure 6 As shown, three rollers 47 are installed between the first inner turntable 45 and the second inner turntable 46. A roller shaft 471 is installed through the center of each roller 47. The roller shaft 471 passes through the straight groove 4b and extends into the arc-shaped groove 4a. When the relative positions of the inner and outer turntables are adjusted, the intersection of the straight groove and the arc-shaped groove changes, thereby adjusting the position of the rollers. The width of the straight groove 4b and the width of the arc-shaped groove 4a are both equal to the diameter of the roller shaft 471, so that the roller shaft 471 can be stably clamped at the intersection of the straight groove 4b and the arc-shaped groove 4a.

[0035] Preferably, the outer turntable 42 has scale lines 422 evenly arranged around its periphery, and the inner turntable 45 has an indicator arrow 451 fixed around its periphery, the indicator arrow 451 pointing to the scale lines 422. By setting the indicator arrow and scale lines, the accuracy of roller position adjustment and the accuracy of peristaltic pump can be improved.

[0036] like Figure 7 , Figure 8 As shown, if it is necessary to reduce the gap between the roller 47 and the inner wall of the housing 3, rotate the first inner turntable 45 clockwise. When the outer end of the arc groove 4a coincides with the outer end of the straight groove 4b, the roller 47 is located at the outermost end, and the gap between the roller 47 and the inner wall of the housing 3 is the smallest.

[0037] If it is necessary to increase the gap between the roller 47 and the inner wall of the housing 3, rotate the first inner turntable 45 counterclockwise. When the inner end of the arc groove 4a coincides with the inner end of the straight groove 4b, the roller 47 is located at the innermost end, and the gap between the roller 47 and the inner wall of the housing 3 is the largest.

[0038] The relative positions of the inner and outer turntables can be adjusted to change the intersection of the straight and curved grooves, thereby adjusting the position of the rollers. Furthermore, the rollers are fixed by the inner and outer turntables, which improves the stability of the rollers and ensures the accuracy of the peristaltic pump.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An adjustable peristaltic pump, comprising a motor base, a motor disposed on one side of the motor base, a housing disposed on the side of the motor base away from the motor, two connectors disposed on the housing, the housing and the motor base forming a mounting cavity, a roller assembly rotatably mounted within the mounting cavity, a flexible hose disposed between the roller assembly and the inner wall of the mounting cavity, the two ends of the flexible hose being respectively connected to the connectors, characterized in that, The roller assembly includes a connecting shaft fixedly connected to the output shaft of the motor. Outer turntables are respectively provided at both ends of the connecting shaft, and the outer turntables have several arc-shaped grooves. A connecting sleeve is fitted around the outside of the connecting shaft, and inner turntables are respectively provided at both ends of the connecting sleeve. The inner turntables have several straight grooves, the number of which is equal to the number of arc-shaped grooves. The straight grooves are arranged along the radial direction of the inner turntables, and the arc-shaped grooves intersect with the straight grooves. A roller is arranged between two inner turntables, and a roller shaft is inserted through the center of the roller. The roller shaft passes through the straight grooves and extends into the arc-shaped grooves. The width of both the straight grooves and the width of the arc-shaped grooves are equal to the diameter of the roller shaft.

2. The adjustable peristaltic pump according to claim 1, characterized in that, The outer turntable includes a first outer turntable and a second outer turntable. The first outer turntable is fixed to one end of the connecting shaft. A connecting hole is opened in the center of the first outer turntable, and the output shaft of the motor is fixedly connected to the connecting hole. A first snap-fit ​​groove is opened on the second outer turntable. A first snap-fit ​​block is provided at one end of the connecting shaft near the second outer turntable. The first snap-fit ​​block is interference-fitted into the first snap-fit ​​groove.

3. The adjustable peristaltic pump of claim 2, wherein, The second outer turntable has a first threaded hole at its center that extends into the connecting shaft, and a clamping block is screwed into the first threaded hole.

4. The adjustable peristaltic pump of claim 1, wherein, The inner turntable includes a first inner turntable and a second inner turntable. The first inner turntable is fixed to one end of the connecting sleeve. A second snap-fit ​​groove is provided on the second inner turntable. A second snap-fit ​​block is provided at one end of the connecting sleeve near the second inner turntable. The second snap-fit ​​block is interference-fitted into the second snap-fit ​​groove.

5. The adjustable peristaltic pump of claim 4, wherein, The connecting sleeve has a second threaded hole, and a set screw is screwed into the second threaded hole.

6. The adjustable peristaltic pump of claim 1, wherein, The outer turntable has scale lines on its periphery, and the inner turntable has indicator arrows on its periphery, with the indicator arrows pointing to the scale lines.

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