peristaltic pump

Abstract

The application discloses a peristaltic pump, and relates to the technical field of medical devices, which comprises a hose, a driving assembly and a roller assembly. The roller assembly comprises a rotating platform, a sliding block and a roller. The sliding block is slidingly connected to the rotating platform, and the sliding direction of the sliding block is arranged at an angle with the rotating shaft of the rotating platform. The roller is rotatably connected to the sliding block. The driving assembly comprises a rotating driving part and a sliding driving part. The rotating driving part is connected to the rotating platform and is used for driving the rotating platform to rotate so as to drive the roller to extrude the hose. The sliding driving part is connected to the sliding block and is used for driving the sliding block to slide back and forth relative to the rotating platform so as to adjust the extrusion force of the roller on the hose. The roller can roll on the hose during the rotation of the rotating platform and / or the sliding of the sliding block, and the extrusion degree on the hose can be adjusted. When the work is finished, the roller can be adjusted to slide away from the hose so as to reduce the extrusion force on the hose, and the position of the hose that is extruded can be prevented from being adhered and unable to reset.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a peristaltic pump. Background Technology

[0002] A peristaltic pump is similar to using a clamp to hold a fluid-filled tube, and as the clamp slides along the tube, the fluid inside moves in the direction the clamp is moving. A peristaltic pump uses this principle, but instead of a clamp, it uses rollers to alternately squeeze and release the flexible delivery tube, causing the liquid inside to flow.

[0003] For example, prior art with announcement number CN103423134A discloses a peristaltic pump, including a pump casing with a pump chamber, a pump cover movably disposed in the pump chamber, a roller assembly, a first drive assembly for driving the roller assembly to rotate, and a second drive assembly for driving the pump cover to move linearly along the axial direction of the peristaltic pump. The pump cover is provided with pressure claws. The roller assembly is installed in the pump chamber. The first drive assembly includes a rotary table and a first drive member for driving the rotary table to rotate. The roller assembly is supported on the rotary table and rotates with the rotary table. The roller assembly can move linearly relative to the rotary table along the axial direction of the peristaltic pump. The second drive assembly includes a second drive member. The pump casing, the first drive member, and the second drive member are arranged sequentially along the axial direction of the peristaltic pump. The second drive member has a telescopic rod, and the telescopic rod passes through the first drive member and the rotary table and is connected to the roller assembly and the pump cover.

[0004] However, this existing technology still has drawbacks. For example, the roller assembly can only rotate when the first drive unit rotates the turntable to force the fluid in the hose to flow out. The movement path of the roller assembly is too fixed, which cannot fully squeeze the fluid out of the hose, resulting in low fluid squeezing efficiency. In addition, when the work is finished, the roller assembly tends to stay at the position where the hose is squeezed, causing the squeezed part of the hose to stick and unable to return to its original position. Summary of the Invention

[0005] In view of this, it is necessary to provide a peristaltic pump to solve the technical problem that the movement path of the roller assembly in the prior art is too fixed, which makes it impossible to fully squeeze the fluid in the hose and results in low fluid squeezing efficiency.

[0006] To achieve the above-mentioned technical objectives, the present invention provides a peristaltic pump, comprising:

[0007] hose;

[0008] A roller assembly includes a rotating platform, a slider, and a roller. The slider is slidably connected to the rotating platform, and the sliding direction of the slider is set at an angle to the rotation axis of the rotating platform. The roller is rotatably connected to the slider.

[0009] The drive assembly includes a rotary drive unit and a sliding drive unit. The rotary drive unit is connected to the rotary platform and is used to drive the rotary platform to rotate, thereby driving the roller to squeeze the hose. The sliding drive unit is connected to the slider and is used to drive the slider to slide back and forth relative to the rotary platform, thereby adjusting the squeezing force of the roller on the hose.

[0010] Furthermore, there are two sliders, both of which are connected to the sliding drive unit, and the two sliders can slide in opposite directions under the drive of the sliding drive unit.

[0011] Furthermore, the slider has multiple rollers, which are linearly spaced along a sliding direction perpendicular to the slider.

[0012] Furthermore, the rotating platform includes a turntable and a slide rail. The slide rail is disposed on the turntable, and the length extension direction of the slide rail is perpendicular to the rotation axis of the turntable. The slider is slidably connected to the slide rail, and the turntable can rotate under the drive of the rotating drive unit.

[0013] Furthermore, the roller assembly also includes a first transmission member, which rotatably passes through the turntable. One end of the first transmission member is connected to the sliding drive unit, and the other end of the first transmission member is simultaneously engaged with the two sliders. The first transmission member can rotate relative to the turntable under the drive of the sliding drive unit, thereby driving the sliders to slide through the meshing transmission.

[0014] Furthermore, the roller assembly also includes a second transmission member, one end of which is connected to the turntable, and the other end of which is engaged with the rotary drive unit. The rotary drive unit can drive the second transmission member to rotate through engagement, thereby driving the turntable to rotate.

[0015] Furthermore, the roller assembly also includes a bearing, the first transmission member passes through the second transmission member and is rotatably connected to the second transmission member through the bearing, and the central axis of the first transmission member is parallel to the central axis of the second transmission member.

[0016] Furthermore, the first transmission member has a first gear at the end near the sliding drive part, and the second transmission member has a second gear at the end near the rotary drive part. The second gear is coaxially arranged with the first gear. The rotary drive part and the sliding drive part are arranged on both sides of the second transmission member, and the sliding drive part meshes with the first gear and the rotary drive part meshes with the second gear.

[0017] Furthermore, the sliding drive unit includes a sliding motor, a second output shaft, and a second meshing part. The two ends of the second output shaft are respectively connected to the sliding motor and the second meshing part. The second meshing part meshes with the first gear. The sliding motor can drive the second meshing part to rotate through the second output shaft, so that the second meshing part drives the first gear to rotate through meshing.

[0018] Furthermore, the two sliders are a first slider and a second slider, and both the first slider and the second slider include a first fixed block and a second fixed block connected to each other. The length extension direction of the first fixed block is set at an angle to the length extension direction of the second fixed block to form a clearance groove. A portion of the first slider is located in the clearance groove of the second slider, and a portion of the second slider is located in the clearance groove of the first slider.

[0019] Compared with the prior art, the beneficial effects of the present invention include: the peristaltic pump of the present invention has a rotary drive unit and a sliding drive unit. The rotary platform can rotate under the drive of the rotary drive unit, thereby driving the roller to rotate, and the roller can roll on the hose. The slider can slide relative to the rotary platform under the drive of the sliding drive unit, thereby driving the roller to roll on the hose. It can be seen that the roller can roll on the hose during the rotation of the rotary platform and / or the sliding of the slider, so as to squeeze the fluid in the hose. The movement path of the roller is more diversified, which can fully squeeze the fluid in the hose, and the fluid squeezing efficiency is high. In addition, the slider can slide back and forth under the drive of the sliding drive unit to adjust the squeezing force of the roller on the hose; when the work is finished, the roller can be adjusted to slide away from the hose to reduce the squeezing force on the hose, and the squeezed part of the hose is less likely to stick and become unable to return to its original position. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the peristaltic pump provided in an embodiment of the present invention;

[0021] Figure 2 This is an exploded structural diagram of the peristaltic pump provided in an embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the peristaltic pump provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the roller assembly in the peristaltic pump provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the second main shell in the peristaltic pump provided in an embodiment of the present invention;

[0025] Figure 6This is a schematic diagram of the structure of the first slider and the second slider in the peristaltic pump provided in the embodiment of the present invention. Detailed Implementation

[0026] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0027] refer to Figure 1 This invention provides a peristaltic pump 100, which drives a roller to move, causing the roller to squeeze fluid out of a hose. The roller has a variety of movement paths, which can more fully squeeze the fluid out of the hose, making it less likely for fluid to remain in the hose, and resulting in high fluid squeezing efficiency.

[0028] refer to Figures 1 to 4 The peristaltic pump 100 includes a housing 1, a drive assembly 2, a roller assembly 3, and a hose 4, wherein the drive assembly 2, the roller assembly 3, and the hose 4 are all located inside the housing 1. The drive assembly 2 is connected to the roller assembly 3 and is used to drive the roller assembly 3 to move. The roller assembly 3 abuts against the hose 4, thereby causing the drive assembly 2 to drive the roller assembly 3 to roll on the hose 4 to squeeze out the fluid inside the hose 4.

[0029] refer to Figure 1 The outer casing 1 includes a top cover 11, a first main casing 12, a middle casing 13, a second main casing 14, and a bottom casing 15 arranged sequentially from top to bottom. The top cover 11 and the bottom casing 15 are used to encapsulate the outer casing 1. The drive assembly 2 is encapsulated between the second main casing 14 and the bottom casing 15, and the roller assembly 3 is encapsulated between the first main casing 12 and the middle casing 13.

[0030] refer to Figure 3 The drive assembly 2 includes a rotary drive unit 21, a sliding drive unit 22, and a main control board 23. The rotary drive unit 21 and the sliding drive unit 22 are electrically connected to the main control board 23. The main control board 23 can control the rotary drive unit 21 and the sliding drive unit 22 to operate independently without affecting each other, or it can control the rotary drive unit 21 and the sliding drive unit 22 to operate simultaneously. The main control board 23 can be wirelessly or wiredly connected to an external terminal, allowing control of the rotary drive unit 21 and the sliding drive unit 22 to operate or not operate via the external terminal.

[0031] When the rotary drive unit 21 is working, it can drive the roller assembly 3 to rotate, so that the roller assembly 3 rolls on the hose 4. When the sliding drive unit 22 is working, it can drive the roller assembly 3 to slide back and forth, so as to adjust the rotation diameter of the roller assembly 3, which can also be understood as adjusting the squeezing force of the roller assembly 3 on the hose 4.

[0032] The rotary drive unit 21 includes a rotary motor 211, a first output shaft 212, and a first engagement part 213. The two ends of the first output shaft 212 are connected to the rotary motor 211 and the first engagement part 213, respectively. The first engagement part 213 engages with the roller assembly 3. The rotary motor 211 is electrically connected to the main control board 23. Under the drive of the main control board 23, the rotary motor 211 can drive the first output shaft 212 to rotate, so that the first output shaft 212 drives the roller assembly 3 to rotate via the first engagement part 213.

[0033] The sliding drive unit 22 includes a sliding motor 221, a second output shaft 222, and a second engagement part 223. The two ends of the second output shaft 222 are respectively connected to the sliding motor 221 and the second engagement part 223. The second engagement part 223 engages with the roller assembly 3. The sliding motor 221 is electrically connected to the main control board 23. Under the drive of the main control board 23, the sliding motor 221 can drive the second output shaft 222 to rotate, so that the second output shaft 222 drives the roller assembly 3 to slide through the second engagement part 223, thereby adjusting the squeezing force of the roller assembly 3 on the hose 4.

[0034] It is understood that in other embodiments, the sliding drive unit 22 can also be replaced by a cylinder. Connecting the cylinder to the first slider 32 or the second slider 33 can also drive the first slider 32 or the second slider 33 to slide back and forth.

[0035] refer to Figure 2 and Figure 4 The roller assembly 3 includes a rotating platform 31, a first slider 32, a second slider 33, a first transmission member 34, a second transmission member 35, rollers 36, and bearings 37. The first slider 32 and the second slider 33 are positioned opposite each other and spaced apart, both slidably mounted on the rotating platform 31. The first transmission member 34 passes through the rotating platform 31 and engages with both the first slider 32 and the second slider 33. The first slider 32 and the second slider 33 can slide in opposite directions when the first transmission member 34 rotates. Multiple rollers 36 are rotatably mounted on the first slider 32 and the second slider 33. During movement, the first slider 32 and the second slider 33 drive the rollers 36 to press against the hose 4, causing the rollers 36 to roll on the hose 4. The sliding motion of the first slider 32 and the second slider 33 adjusts the pressure exerted by the rollers on the hose 4. When not in use, the first slider 32 and the second slider 33 can be slid away from the hose to prevent them from severely compressing the hose 4, thus preventing deformation of the hose 4 and affecting its use.

[0036] Multiple rollers 36 on the first slider 32 or the second slider 33 are linearly spaced along a sliding direction perpendicular to the corresponding slider. The presence of rollers 36 on both the first slider 32 and the second slider 33 increases the area of ​​the compression hose 4, enabling more efficient discharge of fluid from the hose 4. In other embodiments, the invention may also provide three or more sliders, each equipped with rollers 36, to further expand the area of ​​the compression hose 4. Of course, in some embodiments, only one slider may be provided; this is not a limitation.

[0037] The sliding directions of the first slider 32 and the second slider 33 are parallel to each other and perpendicular to the rotation axis of the rotating platform 31. In other embodiments, the sliding directions of the first slider 32 and the second slider 33 can also be set at other angles to the rotation axis of the rotating platform 31, which are not limited here. When the angle is different, the range of motion of the first slider 32 and the second slider 33 is different, thus the extrusion effect on the hose 4 is also different. In addition, compared with the embodiment where the sliding directions of the first slider 32 and the second slider 33 are parallel to the rotation axis of the rotating platform 31, this embodiment can widen the range of movement of the first slider 32 and the second slider 33 in the radial direction of the rotating platform 31, thereby widening the range of motion of the roller 36, so that the roller 36 can have more adjustment space for extruding the hose 4.

[0038] The rotating platform 31 includes a turntable 311, a first protrusion 312, a second protrusion 313, a first slide rail 314, and a second slide rail 315. The first protrusion 312 and the second protrusion 313 are both located on the turntable 311, and the first slide rail 314 and the second slide rail 315 are respectively located on the sides of the first protrusion 312 and the second protrusion 313. The first slide rail 314 is used for sliding connection of the first slider 32, and the second slide rail 315 is used for sliding connection of the second slider 33, so that the first slider 32 and the second slider 33 can slide back and forth on the first slide rail 314 and the second slide rail 315 respectively.

[0039] The length extension directions of the first slide rail 314 and the second slide rail 315 are both perpendicular to the rotation axis of the turntable 311, so that the first slider 32 and the second slider 33 can slide along a direction perpendicular to the rotation axis of the turntable 311.

[0040] The first slide rail 314 and the second slide rail 315 are detachably mounted to the first protrusion 312 and the second protrusion 313 respectively by corresponding mounting screws. In other embodiments, the mounting method of the slide rail and the corresponding protrusion is not limited. For example, it can also be a welded or integrally formed structure, or it can be other detachable mounting methods. No further limitations are made here.

[0041] The first slider 32 and the second slider 33 have the same structure. The following description will only take the first slider 32 as an example, and the second slider 33 will not be described in detail.

[0042] refer to Figure 6 The first slider 32 includes a first fixing block 321 and a second fixing block 322. The first fixing block 321 and the second fixing block 322 are integrally formed structures. Alternatively, in other embodiments, the first fixing block 321 and the second fixing block 322 can be connected in a detachable manner.

[0043] The first fixing block 321 has a groove 323 on one side, which is used to slide with the first slide rail 314 so that the first slider 32 can slide back and forth on the first slide rail 314.

[0044] The other side of the first fixed block 321 has a locking tooth 324, which is used to engage with the first transmission member 34, so that the first slider 32 can slide back and forth on the first slide rail 314 when the first transmission member 34 rotates.

[0045] The length extension direction of the second fixing block 322 is perpendicular to the length extension direction of the first fixing block 321, so that a first clearance groove 325 is formed between the second fixing block 322 and the first fixing block 321. In other embodiments, the length extension direction of the second fixing block 322 and the length extension direction of the first fixing block 321 can be set at other angles, such as 45° or 60°, and the first clearance groove 325 can also be formed.

[0046] The first clearance groove 325 is used to avoid the first fixing block of the second slider 33. It can also be understood that the first fixing block of the second slider 33 is located in the first clearance groove 325 and can slide in the first clearance groove 325. Similarly, the second slider 33 has a second clearance groove 326, which is used to avoid the first fixing block 321 of the first slider 32. The first fixing block 321 of the first slider 32 can slide in the second clearance groove 326. This design makes the installation of the first slider 32 and the second slider 33 more compact, makes full use of space, and makes the entire peristaltic pump 100 occupy less space and is convenient to use.

[0047] In other embodiments, the length extension direction of the second fixing block 322 is parallel to the length extension direction of the first fixing block 321. In this embodiment, the first clearance groove 325 cannot be formed between the first fixing block 321 and the second fixing block 322. The first fixing block 321 and the second fixing block 322 are arranged close to each other, which can also save space.

[0048] Two rollers 36 are rotatably mounted on the top of the first fixing block 321, and the two rollers 36 are spaced apart along the length of the first fixing block 321. Each roller 36 can abut against the hose 4 during the back-and-forth sliding of the first slider 32, so that the roller 36 rolls on the hose 4. In other embodiments, one, three or more rollers 36 may be provided on the top of the first slider 32, which is not limited here.

[0049] One end of the first transmission member 34 has a first gear 341, and the other end of the first transmission member 34 passes through a turntable 311 and simultaneously engages with the teeth of the first slider 32 and the second slider 33. This arrangement helps to reduce the space occupied by the roller assembly 3. The first transmission member 34 simultaneously drives the first slider 32 and the second slider 33 to slide. Compared with embodiments that require two driving members to drive the corresponding sliders, this embodiment is beneficial to improving work efficiency.

[0050] It is understood that in other embodiments, the first transmission member 34 can also connect the first slider 32 and the second slider 33 in other ways, for example, the side of the first transmission member 34 can simultaneously engage the first slider 32 and the second slider 33, which is not limited here.

[0051] The first gear 341 meshes with the second meshing part 223. When the sliding motor 221 is working, it can drive the second meshing part 223 to rotate through the second output shaft 222, so that the second meshing part 223 drives the first gear 341 to rotate through meshing. The first gear 341 drives the first transmission member 34 to rotate, so that the first transmission member 34 drives the first slider 32 and the second slider 33 to slide in opposite directions at the same time through meshing transmission.

[0052] One end of the second transmission member 35 has a second gear 351, and the other end of the second transmission member 35 is connected to the turntable 311. The second gear 351 meshes with the first meshing part 213. When the rotary motor 211 is working, it can drive the first meshing part 213 to rotate through the first output shaft 212, so that the first meshing part 213 drives the second gear 351 to rotate through meshing. The second gear 351 drives the second transmission member 35 to rotate, and then the second transmission member 35 drives the turntable 311 to rotate. Since the first slider 32, the second slider 33 and the roller 36 are all located on the turntable 311, the turntable 311 can drive the roller 36 to rotate when it rotates, so that the roller 36 rolls on the hose 4.

[0053] The rotary motor 211 and the sliding motor 221 transmit power to the first transmission member 34 and the second transmission member 35 through gear meshing, which can buffer the first transmission member 34 and the second transmission member 35 and make the movement of the first transmission member 34 and the second transmission member 35 easier to control.

[0054] The inner ring of bearing 37 is sleeved on the first transmission member 34, and the outer ring of bearing 37 is connected to the second transmission member 35. The first transmission member 34 passes through the second transmission member 35 and also passes through the bearing 37. It can be understood that the first transmission member 34 is rotatably connected to the second transmission member 35 through the bearing 37, so that the first transmission member 34 and the second transmission member 35 can rotate independently without affecting each other, and save space.

[0055] refer to Figure 5 The second main housing 14 is provided with a first positioning groove 141 and a second positioning groove 142. The sliding motor 221 is slidably inserted into the first positioning groove 141, and the rotary motor 211 is slidably inserted into the second positioning groove 142, so that the rotary motor 211 and the sliding motor 221 can be easily and quickly disassembled and assembled in the second main housing 14.

[0056] In the peristaltic pump 100 of the present invention, the roller 36 is located on a slider, and the slider is located on a rotating platform 31. The rotating platform 31 rotates under the drive of a rotary motor 211, thereby driving the roller 36 to rotate as well. The roller 36 rolls on the hose 4 to discharge fluid. The slider slides relative to the rotating platform 31 under the drive of a sliding motor 221, thereby adjusting the rotation diameter of the roller 36 and the degree of compression of the hose 4 by the roller 36. When the pump stops working, the slider can move the roller 36 away from the hose 4 to prevent the roller 36 from severely compressing the hose 4, which could cause the hose 4 to deform and become unrecoverable, affecting the next operation. When it is necessary to further compress the hose 4 to discharge fluid, the slider can move the roller 36 closer to the hose 4 to further compress the hose 4, resulting in high fluid discharge efficiency.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A peristaltic pump, characterized in that, include: hose; A roller assembly includes a rotating platform, a slider, and a roller. The slider is slidably connected to the rotating platform, and the sliding direction of the slider is set at an angle to the rotation axis of the rotating platform. The roller is rotatably connected to the slider. The drive assembly includes a rotary drive unit and a sliding drive unit. The rotary drive unit is connected to the rotary platform and is used to drive the rotary platform to rotate, thereby driving the roller to squeeze the hose. The sliding drive unit is connected to the slider and is used to drive the slider to slide back and forth relative to the rotary platform, thereby adjusting the squeezing force of the roller on the hose. The roller assembly further includes a first transmission member and a second transmission member. The first transmission member passes through the second transmission member. One end of the first transmission member has a first gear and engages with the sliding drive unit through the first gear. The other end of the first transmission member engages with both sliders. One end of the second transmission member has a second gear and engages with the rotary drive unit through the second gear. The other end of the second transmission member is connected to the rotary platform. The first gear and the second gear are close to each other and coaxially arranged.

2. The peristaltic pump according to claim 1, characterized in that, The number of sliders is two, and both sliders are connected to the sliding drive unit. The two sliders can slide in opposite directions under the drive of the sliding drive unit.

3. The peristaltic pump according to claim 2, characterized in that, The slider has multiple rollers, which are arranged linearly at intervals along the sliding direction perpendicular to the slider.

4. The peristaltic pump according to claim 1, characterized in that, The rotating platform includes a turntable and a slide rail. The slide rail is disposed on the turntable, and the length of the slide rail extends perpendicular to the rotation axis of the turntable. The slider is slidably connected to the slide rail, and the turntable can rotate under the drive of the rotating drive unit.

5. The peristaltic pump according to claim 4, characterized in that, The first transmission member rotatably passes through the turntable. One end of the first transmission member is connected to the sliding drive unit, and the other end of the first transmission member is simultaneously engaged with the two sliders. The first transmission member can rotate relative to the turntable under the drive of the sliding drive unit, thereby driving the sliders to slide through the meshing transmission.

6. The peristaltic pump according to claim 5, characterized in that, One end of the second transmission member is connected to the turntable, and the other end of the second transmission member is engaged with the rotary drive unit. The rotary drive unit can drive the second transmission member to rotate through engagement, thereby driving the turntable to rotate.

7. The peristaltic pump according to claim 6, characterized in that, The roller assembly further includes a bearing, the first transmission member passes through the second transmission member and is rotatably connected to the second transmission member through the bearing, and the central axis of the first transmission member is parallel to the central axis of the second transmission member.

8. The peristaltic pump according to claim 6, characterized in that, The first transmission member has a first gear at the end near the sliding drive part, and the second transmission member has a second gear at the end near the rotary drive part. The rotary drive part and the sliding drive part are disposed on both sides of the second transmission member, and the sliding drive part meshes with the first gear and the rotary drive part meshes with the second gear.

9. The peristaltic pump according to claim 8, characterized in that, The sliding drive unit includes a sliding motor, a second output shaft, and a second meshing part. The two ends of the second output shaft are respectively connected to the sliding motor and the second meshing part. The second meshing part meshes with the first gear. The sliding motor can drive the second meshing part to rotate through the second output shaft, so that the second meshing part drives the first gear to rotate through meshing.

10. The peristaltic pump according to claim 2, characterized in that, The two sliders are a first slider and a second slider. Both the first slider and the second slider include a first fixed block and a second fixed block connected to each other. The length extension direction of the first fixed block is set at an angle to the length extension direction of the second fixed block to form a clearance groove. A portion of the first slider is located in the clearance groove of the second slider, and a portion of the second slider is located in the clearance groove of the first slider.

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