CN219034959U - Peristaltic pump - Google Patents

Abstract

An embodiment of the present utility model provides a peristaltic pump comprising: the pump head shell is provided with a containing cavity, a transmission assembly and a rotary table are rotatably arranged in the containing cavity, a plurality of roller rotating shafts with rotating rollers are arranged on the rotary table, and the roller rotating shafts are in transmission connection with the transmission assembly; the driving shaft of the driving unit at least partially stretches into the accommodating cavity and is connected with the transmission assembly; the baffle ring is fixedly arranged in the accommodating cavity and is concentric with the turntable, and is annularly arranged on the circumferential periphery of the roller rotating shaft, wherein the baffle ring is at least abutted with one of the rotating rollers or the roller rotating shaft so as to limit the rotating rollers to rotate in a limiting space formed by encircling the baffle ring. Through setting up the baffle ring for live-rollers and roller pivot are rotated by spacing in spacing space, and then make carousel and baffle ring keep concentric, avoid taking place eccentric rotation at live-rollers and roller pivot drive down carousel, thereby realize that the extrusion force between live-rollers and the hose remains unanimous throughout, effectively improve peristaltic pump's flow precision and life-span stability.

Description

Peristaltic pump

Technical Field

The utility model relates to the technical field of machinery, in particular to a peristaltic pump.

Background

Peristaltic pumps have been widely used in various industries due to their simple structure, separation of fluids from the pump body, and wide application range. Peristaltic pumps operate on the principle that rollers cyclically squeeze a hose to create a pressure differential that is used to carry fluid.

However, the conventional peristaltic pumps used at present have some defects, for example, the conventional peristaltic pumps have the problems of unstable flow accuracy and reduced service life of the hose when in use, and meanwhile, the peristaltic pumps are easy to damage.

Disclosure of Invention

In view of the above, embodiments of the present utility model have been made to provide a peristaltic pump that solves the above-described problems.

In one embodiment of the present utility model, there is provided a peristaltic pump comprising:

the pump head comprises a pump head shell, wherein the pump head shell is provided with a containing cavity, a transmission assembly and a rotary table are rotatably arranged in the containing cavity, a plurality of roller rotating shafts with rotating rollers are arranged on the rotary table, and the roller rotating shafts are in transmission connection with the transmission assembly;

the driving shaft of the driving unit at least partially stretches into the accommodating cavity and is connected with the transmission assembly;

the baffle ring is fixedly arranged in the accommodating cavity, is arranged concentrically with the turntable, and is annularly arranged on the circumferential periphery of the roller rotating shaft, wherein the baffle ring is at least abutted with one of the rotating rollers or the roller rotating shaft so as to limit a plurality of rotating rollers to rotate in a limit space surrounded by the baffle ring.

In some embodiments, the baffle ring is provided with a limit flange, and the limit flange extends into a gap between the rotating roller and the pump head shell and is at least in butt joint with the rotating roller.

In some embodiments, the limit flange abuts the pump head housing.

In some embodiments, a support block is disposed on at least a portion of the outer wall of the limit flange, and the support block abuts the pump head housing.

In some embodiments, the pump head housing is provided with an inlet and an outlet, and the support block is arranged on the outer wall of the limit flange at least corresponding to the area between the inlet and the outlet.

In some embodiments, the inner annular wall of the baffle ring protrudes from the limit flange along the radial direction to form a limit groove with the limit flange, and the rotating roller is at least partially limited in the limit groove.

In some embodiments, the outer annular wall of the baffle ring protrudes from the limit flange along the radial direction, a mounting groove is formed on the inner wall of the pump head shell, and the outer annular wall of the baffle ring is at least partially fixedly mounted in the mounting groove.

In some embodiments, the pump head housing comprises an upper housing and a lower housing that snap-fit to form the pump head housing.

In some embodiments, a plurality of first positioning structures are provided on an end surface of the upper housing connected with the lower housing and/or on an end surface of the lower housing connected with the upper housing;

the baffle ring is provided with a second positioning structure matched with the first positioning structure, and the second positioning structure is matched and connected with the first positioning structure.

In some embodiments, one of the first positioning structure and the second positioning structure is a positioning block, and the other is a positioning hole or a positioning groove.

In some embodiments, the rotary disc is provided with a first shaft hole concentrically arranged with the rotary disc, the pump head shell is provided with a rotary disc shaft matched with the shaft hole, and the rotary disc is rotatably sleeved on the rotary disc shaft through the first shaft hole.

In some embodiments, a first extension wall is arranged on the turntable along the periphery of the first shaft hole in a surrounding manner, and the first extension wall forms a first extension hole of the first shaft hole;

the rotary table is characterized in that an extension section is arranged on the rotary table shaft, and the rotary table is rotatably sleeved on the rotary table shaft with the extension section through the first shaft hole and the first extension hole.

In some embodiments, the turntable shaft is sleeved with at least one first bearing, and the turntable shaft is connected with the turntable through the first bearing;

when the number of the first bearings is multiple, the turntable shaft is sleeved with a first shaft sleeve, and the first shaft sleeve is positioned between two adjacent first bearings.

In some embodiments, the rotary disc is provided with a second shaft hole which is concentric with the rotary disc, and the pump head shell is provided with an adapter part;

the driving shaft of the driving unit at least partially stretches into the accommodating cavity, can be rotatably arranged in the second shaft hole in a penetrating mode, and is rotatably connected with the switching part.

In some embodiments, a second extension wall is arranged on the turntable along the periphery of the second shaft hole in a surrounding manner, and the second extension wall forms a second extension hole of the second shaft hole;

the turntable is rotatably sleeved on the driving shaft through the second shaft hole and the second extension hole.

In some embodiments, at least one second bearing is sleeved on the driving shaft, and the driving shaft is connected with the turntable and/or the adapter part through the second bearing;

when the number of the second bearings is multiple, the second shaft sleeves are sleeved on the driving shafts, and the second shaft sleeves are positioned between two adjacent second bearings.

Accordingly, there is also provided in an embodiment of the present utility model a peristaltic pump comprising:

the pump head comprises a pump head shell, a rotary table and a rotary table, wherein the pump head shell is provided with a containing cavity, a transmission assembly is arranged in the containing cavity, the pump head shell is provided with a rotary table shaft, and an extension section is arranged on the rotary table shaft;

the rotary table is positioned in the accommodating cavity and is in transmission connection with the transmission assembly, a first shaft hole which is concentric with the rotary table is formed in the rotary table, a first extension wall is arranged along the periphery of the first shaft hole in a surrounding mode, and the first extension wall surrounds to form a first extension hole of the first shaft hole;

the turntable is rotatably sleeved on the turntable shaft with the extension section through the shaft hole and the first extension hole;

and the driving shaft of the driving unit at least partially stretches into the accommodating cavity to be connected with the transmission assembly.

Accordingly, there is also provided in an embodiment of the present utility model a peristaltic pump comprising:

the pump head comprises a pump head shell, a transmission assembly and a connecting part, wherein the pump head shell is provided with a containing cavity, the containing cavity is internally provided with the transmission assembly, and the pump head shell is provided with the connecting part;

the rotary table is positioned in the accommodating cavity and is provided with a second shaft hole which is concentric with the rotary table;

and the driving shaft of the driving unit at least partially stretches into the accommodating cavity to be connected with the transmission assembly, rotatably penetrates through the second shaft hole and is rotatably connected with the switching part.

In addition, in some embodiments, a second extension wall is arranged on the turntable along the periphery of the second shaft hole, and the second extension wall surrounds a second extension hole of the second shaft hole;

the turntable is rotatably sleeved on the driving shaft through the second shaft hole and the second extension hole.

According to the technical scheme provided by the embodiment of the utility model, the baffle ring is arranged in the accommodating cavity, so that the rotating roller and the roller rotating shaft are limited to rotate in the limiting space surrounded by the baffle ring, the rotary table and the baffle ring are further kept concentric, the rotary table is prevented from eccentric rotation under the drive of the rotating roller and the roller rotating shaft, the extrusion force between the rotating roller and the hose is always kept consistent, the flow precision and the service life stability of the peristaltic pump are effectively improved, the vibration and the noise of the peristaltic pump are reduced, and the user experience comfort level is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a peristaltic pump according to an embodiment of the present utility model;

FIG. 2 is an enlarged partial cross-sectional schematic view of the peristaltic pump shown in FIG. 1;

FIG. 3 is a schematic diagram of an explosion structure of a peristaltic pump according to an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a baffle ring according to an embodiment of the present utility model;

FIG. 5 is a schematic view of another structure of a baffle ring according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a force application manner of a rotating roller according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a partial cross-sectional structure of another peristaltic pump according to an embodiment of the present utility model;

FIG. 8 is a schematic diagram of an exploded structure of another peristaltic pump according to an embodiment of the present utility model;

FIG. 9 is a schematic view of a partial cross-sectional structure of a peristaltic pump according to another embodiment of the present utility model;

fig. 10 is a schematic diagram of an exploded structure of a peristaltic pump according to another embodiment of the present utility model.

Detailed Description

In order to enable those skilled in the art to better understand the present utility model, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present utility model with reference to the accompanying drawings.

The inventor finds that the conventional peristaltic pump used at present has some defects when the embodiment of the utility model is practiced, for example, the conventional peristaltic pump has the problems of unstable flow precision and reduced service life of a hose when in use, and the peristaltic pump is easy to damage.

The reason for this is that the structure of conventional peristaltic pumps is usually composed of three parts, a driver, a pump head structure and a hose. In the pump head structure, the roller is installed on the carousel, and the one end of carousel is connected with the driver through drive mechanism and is obtained power, and the other end is connected with the pump head casing and is fixed a position, and the carousel often uses the shaft hole cooperation with the one end that the pump head casing is connected.

In the traditional peristaltic pump, based on factors such as machining error, the shaft hole of carousel is clearance fit with pump head casing cooperation, exists the clearance, and the cooperation size is shorter, forms the cantilever, and consequently the extrusion of hose and the roller of carousel can lead to the carousel eccentric, will lead to the carousel to exert radial direction's effort to transmission mechanism atress uneven for transmission mechanism atress leads to transmission inefficacy and driver inefficacy easily on the one hand, and on the other hand the eccentric of carousel can make hose local pressurized too big, leads to flow precision decline and hose life reduction.

Accordingly, in view of the above problems, embodiments of the present utility model provide a peristaltic pump that addresses the above problems.

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Fig. 1 is a schematic view of a partial cross-sectional structure of a peristaltic pump according to an embodiment of the present utility model, fig. 2 is a schematic view of an enlarged partial cross-sectional structure of the peristaltic pump shown in fig. 1, and fig. 3 is a schematic view of an explosion structure of the peristaltic pump according to an embodiment of the present utility model, as shown in fig. 1 to 3.

In one embodiment of the present utility model, there is provided a peristaltic pump comprising: pump head housing 10, drive unit 40, turntable 20, and retainer ring 30. The pump head housing 10 is the outer casing of the pump head structure of the peristaltic pump, and the pump head housing 10 has a receiving cavity for receiving various components constituting the pump head structure, including but not limited to the turntable 20, the baffle ring 30, and the transmission assembly 50. Namely, a transmission assembly 50 and a rotary table 20 are rotatably arranged in the accommodating cavity, a plurality of roller rotating shafts 22 with rotating rollers 21 are arranged on the rotary table 20, and the roller rotating shafts 22 are in transmission connection with the transmission assembly 50.

The drive shaft 41 of the drive unit 40 extends at least partially into the receiving chamber and is connected to the transmission assembly 50.

The baffle ring 30 is fixedly arranged in the accommodating cavity and is concentric with the turntable 20, and is annularly arranged on the circumferential periphery of the roller rotating shaft 22, wherein, referring to fig. 1 and 2, the baffle ring 30 is abutted against at least one of the rotating roller 21 or the roller rotating shaft 22, so as to limit the rotating rollers 21 to rotate in a limit space 301 surrounded by the baffle ring 30.

According to the technical scheme provided by the embodiment of the utility model, the baffle ring 30 is arranged in the accommodating cavity, so that the rotating roller 21 and the roller rotating shaft 22 are limited to rotate in the limiting space 301 surrounded by the baffle ring 30, the rotary table 20 and the baffle ring 30 are kept concentric, the rotary table 20 is prevented from eccentric rotation under the drive of the rotating roller 21 and the roller rotating shaft 22, the extrusion force between the rotating roller 21 and the hose 60 is always kept consistent, the flow precision and the service life stability of the peristaltic pump are effectively improved, the vibration and noise of the peristaltic pump are reduced, and the user experience comfort level is improved.

For example, with continued reference to FIG. 1, in some embodiments of the utility model, one implementation of the peristaltic pump further includes a hose 60, wherein within the receiving chamber, the baffle ring 30 separates the receiving chamber into a drive chamber and a rotation chamber, the drive assembly 50 is confined within the drive chamber, and the turntable 20 is positioned within the rotation chamber. The drive unit 40 includes, but is not limited to, a motor, and a drive shaft 41 of the drive unit 40 extends into the receiving cavity of the pump head housing 10 to be connected with the transmission assembly 50.

In one implementation of the transmission assembly 50, the transmission assembly 50 includes a sun gear 51 and a plurality of planetary gears 52, the sun gear 51 is in driving connection with the driving shaft 41 of the driving unit 40, the plurality of planetary gears 52 are uniformly arranged around the sun gear 51 and are in meshed connection with the sun gear 51, the driving shaft 41 can drive the sun gear 51 to rotate, and the sun gear 51 drives the plurality of planetary gears 52 to rotate around the central axis of the sun gear 51. The turntable 20 is in driving connection with the driving assembly 50 through a plurality of roll rotating shafts 22, in such a way that each roll rotating shaft 22 is respectively connected with a planetary gear 52 at a corresponding position, and when the planetary gears 52 rotate around the sun gears 51, the roll rotating shafts 22 are driven to rotate around the central axis of the turntable 20, so that the roll rotating shafts 22 drive the rotating rolls 21 thereon to rotate around the central axis of the turntable 20. The transmission assembly 50 has a speed change function in addition to a transmission function.

The pump head housing 10 is further provided with an inlet 101 and an outlet 102, and one end of the hose 60 can extend from the inlet 101 into the accommodating chamber and around the outer circumferences of the plurality of rotating rollers 21, and then extend from the outlet 102 into the accommodating chamber. When the plurality of rotating rollers 21 rotate around the central axis of the turntable 20, the plurality of rotating rollers 21 cyclically squeeze the hose 60 to generate a pressure difference, thereby carrying the fluid in the hose 60 by the pressure difference to realize a liquid transporting operation.

In order to avoid the eccentricity of the turntable 20 caused by the extrusion of the rotating roller 21 by the hose 60, in the embodiment of the utility model, the baffle ring 30 is arranged in the accommodating cavity, so that the rotating roller 21 and the roller rotating shaft 22 are limited by a limiting space 301 formed by the baffle ring 30, and the radial deviation of the turntable 20 is avoided. That is, the baffle ring 30 is fixed on the pump head shell 10, so that the relative fixing of the position of the baffle ring 30 can be ensured, meanwhile, the rotating roller 21 and the roller rotating shaft 22 on the rotary table 20 are limited by the baffle ring 30, so that the rotating roller 21 is limited to rotate in the limiting space 301, eccentric movement of the rotating roller 21 is avoided, the rotating table 20 and the baffle ring 30 are kept concentric based on the combined action of the rotating rollers 21, the rotary table 20 is prevented from eccentric rotation under the driving of the rotating roller 21 and the roller rotating shaft 22, the extrusion force between the rotating roller 21 and the hose 60 is always kept consistent, the flow precision and the service life stability of the peristaltic pump are effectively improved, vibration and noise of the peristaltic pump are reduced, and the user experience comfort is improved.

To better limit the rotating roller 21 and the roller shaft 22, in some practical embodiments of the present utility model, referring to fig. 2 to 4, the stop ring 30 is provided with a limit flange 31, and the limit flange 31 extends into a gap between the rotating roller 21 and the pump head housing 10 and abuts against at least the rotating roller 21 to limit the rotating rollers 21 to rotate in the limit space 301. The limit effect of the limit space 301 is further perfected and enhanced through the limit flange 31, so that the rotating roller 21 and the roller rotating shaft 22 are ensured to be limited to rotate in the limit space 301, and the rotating disc 20 is prevented from eccentric rotation under the drive of the rotating roller 21 and the roller rotating shaft 22. With continued reference to fig. 2, in one possible manner, the limit flange 31 abuts against the rotating roller 21, and the stop ring 30 abuts against the roller rotating shaft 22, so as to limit the rotating roller 21 and the roller rotating shaft 22, and prevent the turntable 20 from being deflected in the radial direction.

To further ensure stability of the structure of the limit flange 31, the deformation of the limit flange 31 is reduced, and with continued reference to fig. 1 and 2, in some embodiments, the limit flange 31 abuts against the pump head housing 10. Under this kind of setting mode for the both sides of spacing turn-ups 31 butt pump head casing 10 and rotor roller 21 respectively, when spacing turn-ups 31 carry out spacingly to rotor roller 21 promptly, the rotation pipe can apply the reaction force to spacing turn-ups 31, and spacing turn-ups 31 further transmit this reaction force to pump head casing 10, make pump head casing 10 and spacing turn-ups 31 absorb the reaction force that rotor roller 21 transmitted jointly, thereby strengthen separation blade structural strength through pump head casing 10, ensure the structural stability of spacing turn-ups 31, prevent spacing turn-ups 31 atress deformation and lead to spacing inefficacy, ensure the stability of spacing function of spacing turn-ups 31.

In an embodiment of the present utility model, another way to enhance the stability of the limit flange 31 is to combine fig. 1 and fig. 2, and referring to fig. 3 and fig. 5, at least a part of the area on the outer wall of the limit flange 31 is provided with a supporting block 32, where the supporting block 32 abuts against the pump head housing 10. The thickness of the limit flange 31 is increased through the supporting block 32, so that the structural strength of at least a part of the area is enhanced, meanwhile, the support block 32 is abutted to the pump head shell 10, the structural stability of the limit flange 31 is ensured through the pump head shell 10, the limit flange 31 is prevented from being deformed by stress to cause limit failure, and the stability of the limit function of the limit flange 31 is ensured. In addition, the shape of the outer contour of the baffle ring 30 can be changed through the support block 32, so that the gap between the baffle ring 30 and the pump head housing 10 in the radial direction is reduced through the support block 32, the baffle ring 30 can be suitable for pump head housings 10 with more shapes, and the connection between the baffle ring 30 and the pump head housing 10 is more stable.

Further, referring to fig. 6 in conjunction with fig. 3 and 5, the pump head housing 10 is further provided with an inlet and an outlet, and one end of the hose 60 may extend from the inlet 101 into the accommodating chamber and around the outer periphery of the plurality of rotating rollers 21, and then extend from the outlet 102 out of the accommodating chamber. When the plurality of rotating rollers 21 rotate around the central axis of the turntable 20, the plurality of rotating rollers 21 cyclically squeeze the hose 60 to generate a pressure difference, thereby carrying the fluid in the hose 60 by the pressure difference to realize a liquid transporting operation. When the rotating roller 21 presses the hose 60, the hose 60 applies a reaction force to the rotating roller 21 as well, and the direction of the reaction force applied to the rotating roller 21 by the hose 60 is shown by an arrow in fig. 6, and after the rotating roller 21 receives the reaction force of the hose 60, the reaction force is applied to the stopper ring 30, and thus, as shown in fig. 6, the reaction force applied to the stopper ring 30 is maximized corresponding to the region between the inlet 101 and the outlet 102. Thus, in order to enhance the structural strength of this region of the baffle ring 30, in some practical embodiments of the present utility model, support blocks 32 are provided on the outer wall of the limit flange 31 at least in the region corresponding between the inlet 101 and the outlet 102. The structural strength of the baffle ring 30 is enhanced through the supporting blocks 32, deformation of the area is reduced, limit failure caused by stress deformation of the limit flange 31 is prevented, and stability of the limit function of the limit flange 31 is ensured.

For further better limiting the rotating roller 21, referring to fig. 2, 4 and 5, in some practical embodiments of the present utility model, the inner annular wall of the baffle ring 30 protrudes from the limiting flange 31 in the radial direction to form a limiting groove 33 with the limiting flange 31, and the rotating roller 21 is at least partially limited in the limiting groove 33. The limiting groove 33 can limit the rotating stick in the radial direction and the axial direction, thereby ensuring the position stability of the rotating roller 21.

In order to make the relative position between the baffle ring 30 and the pump head housing 10 more stable, and with continued reference to fig. 2 to 5, in some possible embodiments of the present utility model, one way to fix the baffle ring 30 to the pump head housing 10 is to fix the outer ring wall of the baffle ring 30 to the pump head housing 10 in a radial direction by protruding the limit flange 31, and the inner wall of the pump head housing 10 is provided with a mounting groove 11, and the outer ring wall of the baffle ring 30 is at least partially fixedly mounted in the mounting groove 11. The position of the baffle ring 30 in the axial direction and the radial direction is limited by the mounting groove 11, so that the displacement of the baffle ring 30 relative to the pump head housing 10 in the axial direction or the radial direction is avoided, the stability of the relative position between the baffle ring 30 and the pump head housing 10 is ensured, and the limiting function of the baffle ring 30 relative to the rotating roller 21 is ensured.

Referring to fig. 1 and 3, in some embodiments of the present utility model, one way in which the pump head housing 10 may be implemented is that the pump head housing 10 includes an upper housing 12 and a lower housing 13, and the upper housing 12 and the lower housing 13 are snapped together to form the pump head housing 10. The pump head shell 10 with the split structure can be used for conveniently installing various components in the accommodating cavity, and when a certain component is damaged and needs to be repaired and maintained, corresponding repair operation can be carried out by opening the upper shell 12 or the lower shell 13, so that the pump head is very convenient. The mounting groove 11 may be formed on the upper housing 12 or the lower housing 13 according to different requirements, or the upper housing 12 or the lower housing 13 may be provided with a portion of the mounting groove 11, and when the upper housing 12 and the lower housing 13 are fastened together, a complete mounting groove 11 is formed. The upper housing 12 and the lower housing 13 may be coupled in a variety of ways including, but not limited to, snaps, fasteners, threaded connections, and the like.

To further ensure a stable position between the stop ring 30 and the pump head housing 10, in some practical embodiments of the present utility model, a plurality of first positioning structures 103 are provided on the end surface of the upper housing 12 connected to the lower housing 13 and/or on the end surface of the lower housing 13 connected to the upper housing 12. Referring to fig. 4 and 5, the baffle ring 30 is provided with a second positioning structure 34 matched with the first positioning structure 103, and the second positioning structure 34 is matched and connected with the first positioning structure 103. By the mutual positioning action of the first positioning structure 103 and the second positioning structure 34, the accuracy of the installation position of the baffle ring 30 relative to the pump head shell 10 can be effectively ensured, and meanwhile, the stability of the position of the baffle ring 30 is also ensured. In some embodiments, one of the first positioning structure 103 and the second positioning structure 34 is a positioning block, and the other is a positioning hole or a positioning slot.

One way to arrange the second positioning structure 34 is that the outer annular wall of the baffle ring 30 is provided with a convex connecting lug, and the second positioning structure 34 is arranged on the connecting lug. The main structure of the baffle ring 30 can be kept away from by the second positioning structure 34 through the connecting lugs, the structural strength of the baffle ring 30 is not enough, meanwhile, the thickness of the baffle ring 30 can be increased through the connecting lugs, so that the structural strength of the baffle ring 30 is enhanced, the structural stability of the baffle plate is enhanced, and the limit failure caused by the stress deformation of the baffle ring 30 is prevented.

With continued reference to fig. 1-3, in some embodiments of the utility model, one way in which the turntable 20 may be rotatably disposed in the receiving cavity is by providing the turntable 20 with a first shaft hole 201 disposed concentrically with the turntable 20, and providing the pump head housing 10 with a turntable shaft 14 for use with the shaft hole, the turntable 20 being rotatably journalled on the turntable shaft 14 via the first shaft hole 201. The positioning of the turntable 20 can be realized through the first shaft hole 201 and the turntable shaft 14, and the turntable 20 can rotate by taking the turntable shaft 14 as the shaft under the driving of the transmission assembly 50. To further reduce the eccentric movement of the turntable 20, the clearance space between the first shaft hole 201 and the turntable shaft 14 can also be reduced by further controlling the shaft hole fit dimensional accuracy. In order to reduce the friction between the first shaft hole 201 and the turntable shaft 14, a first bearing 15 may be disposed between the first shaft hole 201 and the turntable shaft 14, so that the turntable 20 may rotate more smoothly with respect to the turntable shaft 14.

In order to further reduce the eccentric movement of the turntable 20, besides the stop ring 30 with the limit flange 31, the effect of reducing the swinging of the turntable 20 can be achieved by prolonging the matching length between the first shaft hole 201 and the turntable shaft 14. Referring to fig. 7 and 8, in some embodiments of the present utility model, a first extension wall 23 is formed on the turntable 20 along the outer circumference of the first shaft hole 201, and the first extension wall 23 surrounds the first extension hole forming the first shaft hole 201. In order to match the first shaft hole 201 and the first extension hole, the turntable shaft 14 is provided with an extension section, the length of the turntable shaft 14 is extended by the extension section, and the turntable 20 is rotatably sleeved on the turntable shaft 14 with the extension section through the first shaft hole 201 and the first extension hole. The shaft hole matching length between the turntable 20 and the turntable shaft 14 is increased through the first extension hole and the extension section, so that the contact area between the turntable shaft 14 and the turntable 20 is increased, the connection stability between the turntable shaft 14 and the turntable 20 is enhanced, and the eccentric movement of the turntable 20 is effectively reduced.

For example, with continued reference to fig. 7 and 8, the mating portion of the first shaft hole 201 and the turntable shaft 14 may be regarded as a fulcrum, the turntable 20 may be regarded as a cantilever, and a single fulcrum may be changed to a plurality of fulcrums to solve the cantilever swinging problem. In the embodiment of the present utility model, the length of the first shaft hole 201 is extended by the first extension wall 23, that is, the first extension hole is formed, and at the same time, the length of the turntable shaft 14 is extended by the extension section, so that the shaft hole matching length between the first shaft hole 201 and the turntable shaft 14 can be extended, in some embodiments, the shaft hole matching length between the first shaft hole 201 and the turntable shaft 14 at least reaches the extrusion position of the rotating roller 21 and the hose 60, that is, the length of the first extension wall 23 and the length of the extension section at least reach the extrusion position of the rotating roller 21 and the hose 60, so that the swing amplitude of the turntable 20 can be effectively reduced. Of course, the length of the first extension wall 23 and the length of the extension section may be set according to different requirements, and the embodiment of the present utility model is not limited herein.

In order to reduce the friction between the turntable shaft 14 and the first elongated hole, it is possible to connect the turntable shaft 14 to the turntable 20 via at least one first bearing 15, which is connected to the turntable shaft 14 via the first bearing 15. When the first elongated hole and the turntable shaft 14 are both long, a plurality of bearing-mating sleeves may be installed in the shaft hole fitting for reducing friction. For example, when there are a plurality of first bearings 15, the turntable shaft 14 is sleeved with a first shaft sleeve 16, and the first shaft sleeve 16 is located between two adjacent first bearings 15. The first sleeve 16 separates two adjacent bearings, and reduces friction between the bearings, so that the turntable 20 rotates more smoothly relative to the turntable shaft 14.

It should be noted that, the manner of reducing the eccentric movement of the turntable 20 may be used in combination with the stop ring 30 or the stop ring 30 with the limit flanges 31, or may be applied independently according to the requirement, which does not limit the embodiment of the present utility model specifically, and does not limit the embodiment of the present utility model improperly.

In order to further reduce the eccentric movement of the turntable 20, another way is provided in the embodiment of the present utility model, in addition to the above way, referring to fig. 9 and 10, in some possible embodiments of the present utility model, the turntable 20 is provided with a second axial hole concentrically arranged with the turntable 20, and the pump head housing 10 is provided with the adapter 17. The peristaltic pump further comprises a driving unit 40, wherein a driving shaft 41 of the driving unit 40 at least partially extends into the accommodating cavity and rotatably penetrates through the second shaft hole, and is rotatably connected with the adapter 17. The second shaft hole described in this embodiment may be the same as or different from the first shaft hole 201 in the above embodiment. The adapter 17 may be of a hole or slot configuration, depending on the requirements, so that a corresponding support for the drive shaft 41 of the drive unit 40 may be provided. The driving shaft 41 of the driving unit 40 extends to the position of the pump head shell 10 and penetrates through the second shaft hole of the rotary table 20, so that the driving shaft 41, the rotary table 20 and the axle center of the pump head shell 10 are concentrically arranged, and in the arrangement mode, the rotary table 20 is arranged on the driving shaft 41 of the driving unit 40, so that a peristaltic pump size chain is effectively shortened, size errors and assembly errors of a pump head structure are reduced, and the eccentric probability of the rotary table 20 is reduced.

To further increase the contact area between the turntable 20 and the driving shaft 41, and with continued reference to fig. 9 and 10, in some embodiments of the utility model, a second extension wall 24 is provided on the turntable 20 along the outer circumference of the second shaft hole, and the second extension wall 24 encloses a second extension hole forming the second shaft hole. The turntable 20 is rotatably sleeved on the driving shaft 41 through the second shaft hole and the second extension hole. The shaft hole matching length between the turntable 20 and the driving shaft 41 is increased through the second extension hole, so that the contact area between the driving shaft 41 and the turntable 20 is increased, the connection stability between the driving shaft 41 and the turntable 20 is enhanced, and the eccentric movement of the turntable 20 is effectively reduced. The length of the second extension wall 24 may be set according to different needs, and embodiments of the present utility model are not particularly limited herein.

In order to reduce the friction between the drive shaft 41 and the second elongate hole, it is possible to connect the drive shaft 41 with at least one second bearing 42, the drive shaft 41 being connected to the rotary disk 20 and/or the adapter 17 via the second bearing 42. When the second elongated holes are longer, a plurality of bearing-mating sleeves may be installed in the shaft hole fitting for reducing friction. For example, when there are a plurality of second bearings 42, the driving shaft 41 is sleeved with a second sleeve 43, and the second sleeve 43 is located between two adjacent second bearings 42. By separating the adjacent two bearings by the second sleeve 43, friction between the bearings is reduced, thereby enabling smoother rotation of the turntable 20 relative to the drive shaft 41.

It should be noted that, the manner of reducing the eccentric movement of the turntable 20 may be used in combination with the scheme of the stop ring 30 with the limit flange 31, or may be applied independently according to the requirement, and the embodiment of the present utility model is not specifically limited, and this does not constitute an undue limitation of the embodiment of the present utility model.

Based on the technical solutions in the foregoing embodiments, referring to fig. 7 and fig. 8, in an embodiment of the present utility model, there is further provided a peristaltic pump, including: pump head housing 10, rotary disk 20, and drive unit 40. The pump head housing 10 has a receiving cavity, a transmission assembly 50 is disposed in the receiving cavity, a turntable shaft 14 is disposed on the pump head housing 10, and an extension section is disposed on the turntable shaft 14. The turntable 20 is located in the receiving chamber and is in driving connection with the transmission assembly 50, and the driving shaft 41 of the driving unit 40 extends at least partially into the receiving chamber and is connected with the transmission assembly 50.

The turntable 20 is provided with a first shaft hole 201 concentrically arranged with the turntable 20, a first extension wall 23 is arranged along the outer circumference of the first shaft hole 201, and the first extension wall 23 encloses a first extension hole of the first shaft hole 201. The turntable 20 is rotatably sleeved on the turntable shaft 14 with the extension section through the shaft hole and the first extension hole. The shaft hole matching length between the turntable 20 and the turntable shaft 14 is increased through the first extension hole and the extension section, so that the contact area between the turntable shaft 14 and the turntable 20 is increased, the connection stability between the turntable shaft 14 and the turntable 20 is enhanced, and the eccentric movement of the turntable 20 is effectively reduced. It should be noted that, in the case that the structures do not conflict, the implementation manner of the peristaltic pump in this embodiment may refer to the implementation manner of the peristaltic pump in the foregoing embodiment, and details not described in detail in this embodiment may refer to or refer to those in the foregoing embodiment, which are not described herein in detail.

Based on the technical solutions in the foregoing embodiments, correspondingly, referring to fig. 9 and fig. 10, correspondingly, in an embodiment of the present utility model, there is further provided a peristaltic pump, including: pump head housing 10, rotary disk 20, and drive unit 40. The pump head housing 10 has a housing chamber in which a transmission assembly 50 is provided, and the pump head housing 10 is provided with a joint 17. The turntable 20 is located in the accommodating cavity, and a second shaft hole concentrically arranged with the turntable 20 is arranged on the turntable 20. The driving shaft 41 of the driving unit 40 at least partially extends into the accommodating cavity to be connected with the transmission assembly 50, rotatably penetrates through the second shaft hole, and is rotatably connected with the adapter 17. With the arrangement mode, the peristaltic pump size chain can be effectively shortened, and the size error and assembly error of the pump head structure are reduced, so that the eccentric probability of the turntable 20 is reduced.

Additionally, in some embodiments, a second elongated wall 24 is provided on the dial 20 along the outer periphery of the second shaft bore, the second elongated wall 24 surrounding a second elongated bore that forms the second shaft bore. The turntable 20 is rotatably sleeved on the driving shaft 41 through the second shaft hole and the second extension hole.

It should be noted that, in the case that the structures do not conflict, the implementation manner of the peristaltic pump in this embodiment may refer to the implementation manner of the peristaltic pump in the foregoing embodiment, and details not described in detail in this embodiment may refer to or refer to those in the foregoing embodiment, which are not described herein in detail.

The following describes the technical scheme adopted by the utility model in combination with specific application scenes so as to help understanding. The following application scenario takes the peristaltic pump shown in the figures as an example.

Application scenario one

When a user uses the peristaltic pump to convey liquid, the driving unit 40 drives the turntable 20 to rotate through the transmission assembly 50, and when the turntable 20 rotates, the hose 60 is circularly extruded through the plurality of rotating rollers 21 to generate a pressure difference, so that the fluid in the hose 60 is conveyed by using the pressure difference, and the liquid conveying operation is realized.

When the rotating roller 21 rotates around the central axis of the rotary table 20, the rotating roller 21 can only rotate in the limiting space 301 based on the limiting space 301, the position of the limiting ring 30 can be ensured to be relatively fixed based on the fact that the limiting ring 30 is fixed on the pump head shell 10, meanwhile, the rotating roller 21 on the rotary table 20 is limited by limiting the rotating roller 21 on the limiting ring 30, so that eccentric movement of the rotating roller 21 is avoided, the rotating roller 21 is fixed in the limiting space 301 based on the fact that the running path of the rotating roller 21 is fixed in the limiting space 301, and the rotary table 20 and the limiting ring 30 are kept concentric based on the combined action of the rotating rollers 21, eccentric rotation of the rotary table 20 under the driving of the rotating roller 21 is avoided, and accordingly the extrusion force between the rotating roller 21 and the hose 60 is always kept consistent.

Application scene two

When a user uses the peristaltic pump to convey liquid, the driving unit 40 drives the turntable 20 to rotate through the transmission assembly 50, and when the turntable 20 rotates, the hose 60 is circularly extruded through the plurality of rotating rollers 21 to generate a pressure difference, so that the fluid in the hose 60 is conveyed by using the pressure difference, and the liquid conveying operation is realized.

When the rotating roller 21 rotates around the central axis of the turntable 20, the rotating roller 21 can only rotate in the limiting space 301 based on the limiting effect of the baffle ring 30 and the limiting flange 31 on the baffle ring 30, so that eccentric movement of the rotating roller 21 is avoided, the turntable 20 and the baffle ring 30 are kept concentric based on the combined effect of the rotating rollers 21 and the fixed running path of the rotating roller 21 in the limiting space 301, eccentric rotation of the turntable 20 under the driving of the rotating roller 21 is avoided, and accordingly the extrusion force between the rotating roller 21 and the hose 60 is always kept consistent.

Application scenario three

When a user uses the peristaltic pump to convey liquid, the driving unit 40 drives the turntable 20 to rotate through the transmission assembly 50, and when the turntable 20 rotates, the hose 60 is circularly extruded through the plurality of rotating rollers 21 to generate a pressure difference, so that the fluid in the hose 60 is conveyed by using the pressure difference, and the liquid conveying operation is realized.

When the rotating roller 21 rotates around the central axis of the rotating disk 20, the length of the first shaft hole 201 on the rotating disk 20 is prolonged based on the first extension wall 23, the length of the rotating disk shaft 14 is prolonged based on the extension section, namely, the shaft hole matching length between the first shaft hole 201 and the rotating disk shaft 14 is prolonged, and the fulcrum between the rotating disk 20 and the rotating disk shaft 14 is increased, so that the swinging amplitude of the rotating disk 20 can be effectively reduced, eccentric rotation of the rotating disk 20 under the driving of the rotating roller 21 is avoided, the extrusion force between the rotating roller 21 and the hose 60 is always kept consistent, the flow precision and the service life stability of the peristaltic pump are effectively improved, the vibration and noise of the peristaltic pump are reduced, and the user experience comfort level is improved.

Application scene four

When a user uses the peristaltic pump to convey liquid, the driving unit 40 drives the turntable 20 to rotate through the transmission assembly 50, and when the turntable 20 rotates, the hose 60 is circularly extruded through the plurality of rotating rollers 21 to generate a pressure difference, so that the fluid in the hose 60 is conveyed by using the pressure difference, and the liquid conveying operation is realized.

The peristaltic pump effectively shortens the peristaltic pump size chain by extending the driving shaft 41 of the driving unit 40 to the position of the pump head shell 10 and penetrating the second shaft hole of the rotary table 20, and reduces the size error and assembly error of the pump head structure, thereby reducing the eccentric probability of the rotary table 20. Meanwhile, the length of the second shaft hole on the rotary table 20 is prolonged based on the second extension wall 24, namely, the shaft hole matching length between the second shaft hole and the driving shaft 41 is prolonged, and the pivot between the rotary table 20 and the driving shaft 41 is increased, so that the swing amplitude of the rotary table 20 can be effectively reduced, eccentric rotation of the rotary table 20 under the driving of the rotating roller 21 is avoided, the extrusion force between the rotating roller 21 and the hose 60 is always kept consistent, the flow precision and the service life stability of the peristaltic pump are effectively improved, the vibration and the noise of the peristaltic pump are reduced, and the user experience comfort level is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (19)

1. A peristaltic pump, comprising:

the pump head comprises a pump head shell, wherein the pump head shell is provided with a containing cavity, a transmission assembly and a rotary table are rotatably arranged in the containing cavity, a plurality of roller rotating shafts with rotating rollers are arranged on the rotary table, and the roller rotating shafts are in transmission connection with the transmission assembly;

the driving shaft of the driving unit at least partially stretches into the accommodating cavity and is connected with the transmission assembly;

the baffle ring is fixedly arranged in the accommodating cavity, is arranged concentrically with the turntable, and is annularly arranged on the circumferential periphery of the roller rotating shaft, wherein the baffle ring is at least abutted with one of the rotating rollers or the roller rotating shaft so as to limit a plurality of rotating rollers to rotate in a limit space surrounded by the baffle ring.

2. Peristaltic pump according to claim 1, characterized in that the stop ring is provided with a limit flange which extends into the gap between the turning roll and the pump head housing and abuts at least the turning roll.

3. Peristaltic pump according to claim 2, characterized in that the limit flange abuts the pump head housing.

4. Peristaltic pump according to claim 2, characterized in that a support block is provided on at least a part of the area on the outer wall of the limit flange, which support block abuts against the pump head housing.

5. Peristaltic pump according to claim 4, characterized in that the pump head housing is provided with an inlet and an outlet, and the outer wall of the limit flange is provided with the support block at least in the area between the inlet and the outlet.

6. Peristaltic pump according to claim 2, characterized in that the inner annular wall of the baffle ring protrudes in the radial direction beyond the limit flange to form a limit groove with the limit flange, the rotating roller being at least partially located in the limit groove.

7. Peristaltic pump according to claim 2, characterized in that the outer annular wall of the baffle ring protrudes in the radial direction beyond the limit flange, the inner wall of the pump head housing being provided with a mounting groove, the outer annular wall of the baffle ring being at least partially fixedly mounted in the mounting groove.

8. Peristaltic pump according to any one of claims 1 to 7, characterized in that the pump head housing comprises an upper housing and a lower housing, which are snapped together to form the pump head housing.

9. Peristaltic pump according to claim 8, characterized in that a plurality of first positioning structures are provided on the end face of the upper housing connected to the lower housing and/or on the end face of the lower housing connected to the upper housing;

the baffle ring is provided with a second positioning structure matched with the first positioning structure, and the second positioning structure is matched and connected with the first positioning structure.

10. Peristaltic pump according to claim 9, characterized in that one of the first and second positioning structures is a positioning block and the other is a positioning hole or a positioning groove.

11. Peristaltic pump according to any one of claims 1 to 7, characterized in that the turntable is provided with a first shaft hole arranged concentrically with the turntable, the pump head housing is provided with a turntable shaft for cooperation with the shaft hole, and the turntable is rotatably sleeved on the turntable shaft through the first shaft hole.

12. The peristaltic pump of claim 11 wherein the turntable is provided with a first elongated wall along the outer periphery of the first shaft aperture, the first elongated wall surrounding a first elongated aperture forming the first shaft aperture;

the rotary table is characterized in that an extension section is arranged on the rotary table shaft, and the rotary table is rotatably sleeved on the rotary table shaft with the extension section through the first shaft hole and the first extension hole.

13. Peristaltic pump according to claim 11, characterized in that the turntable shaft is sleeved with at least one first bearing, through which the turntable shaft is connected with the turntable;

when the number of the first bearings is multiple, the turntable shaft is sleeved with a first shaft sleeve, and the first shaft sleeve is positioned between two adjacent first bearings.

14. Peristaltic pump according to any one of claims 1 to 7, characterized in that the turntable is provided with a second axial hole arranged concentrically with the turntable, and the pump head housing is provided with a transition portion;

the driving shaft of the driving unit at least partially stretches into the accommodating cavity, can be rotatably arranged in the second shaft hole in a penetrating mode, and is rotatably connected with the switching part.

15. Peristaltic pump according to claim 14, characterized in that a second elongated wall is provided on the turntable along the outer circumference of the second shaft hole, said second elongated wall surrounding a second elongated hole of the second shaft hole;

the turntable is rotatably sleeved on the driving shaft through the second shaft hole and the second extension hole.

16. Peristaltic pump according to claim 14, characterized in that at least one second bearing is sleeved on the drive shaft, which drive shaft is connected to the turntable and/or the adapter part by means of the second bearing;

when the number of the second bearings is multiple, the second shaft sleeves are sleeved on the driving shafts, and the second shaft sleeves are positioned between two adjacent second bearings.

17. A peristaltic pump, comprising:

the pump head comprises a pump head shell, a rotary table and a rotary table, wherein the pump head shell is provided with a containing cavity, a transmission assembly is arranged in the containing cavity, the pump head shell is provided with a rotary table shaft, and an extension section is arranged on the rotary table shaft;

the rotary table is positioned in the accommodating cavity and is in transmission connection with the transmission assembly, a first shaft hole which is concentric with the rotary table is formed in the rotary table, a first extension wall is arranged along the periphery of the first shaft hole in a surrounding mode, and the first extension wall surrounds to form a first extension hole of the first shaft hole;

the turntable is rotatably sleeved on the turntable shaft with the extension section through the shaft hole and the first extension hole;

and the driving shaft of the driving unit at least partially stretches into the accommodating cavity to be connected with the transmission assembly.

18. A peristaltic pump, comprising:

the pump head comprises a pump head shell, a transmission assembly and a connecting part, wherein the pump head shell is provided with a containing cavity, the containing cavity is internally provided with the transmission assembly, and the pump head shell is provided with the connecting part;

the rotary table is positioned in the accommodating cavity and is provided with a second shaft hole which is concentric with the rotary table;

and the driving shaft of the driving unit at least partially stretches into the accommodating cavity to be connected with the transmission assembly, rotatably penetrates through the second shaft hole and is rotatably connected with the switching part.

19. Peristaltic pump according to claim 18, characterized in that a second elongated wall is provided on the turntable along the outer periphery of the second shaft hole, said second elongated wall enclosing a second elongated hole of the second shaft hole;

the turntable is rotatably sleeved on the driving shaft through the second shaft hole and the second extension hole.

Images