CN219398442U - Roller structure and medical perfusion pump - Google Patents

Abstract

The embodiment of the application provides a roller structure and a medical perfusion pump, wherein the roller structure comprises a mounting main body and a plurality of roller components; the mounting main body comprises a cover body, a plurality of mounting shafts and a plurality of first limiting units, and two opposite ends of each mounting shaft along the axial direction are connected with the cover body; the roller assemblies are in one-to-one correspondence with the mounting shafts, each roller assembly comprises a roller and a bearing structure, each bearing structure comprises an inner ring unit and an outer ring unit capable of rotating relative to the inner ring unit, each roller assembly is sleeved on the corresponding mounting shaft through the corresponding bearing structure, the inner ring unit is adjacent to the opposite sides of the cover body and is respectively abutted with the cover body through a first limiting unit, the outer ring units are not in contact with the mounting body, so that the inner ring units are axially limited, and the outer ring units are axially suspended, so that the rollers sleeved on the periphery of the outer ring units can freely rotate. By adopting the roller structure of the embodiment of the application, the roller can be ensured to rotate well and smoothly under various flow rates of the medical infusion pump.

Description

Roller structure and medical perfusion pump

Technical Field

The application relates to the technical field of medical equipment, in particular to a roller structure and a medical perfusion pump.

Background

In the related art, a roller structure is generally arranged on a medical infusion pump, and the roller structure is used for pumping fluid in a liquid pipe by extruding the liquid pipe in the rotation process.

In order to ensure the flow accuracy of the medical infusion pump, the roller structure is mostly provided with rollers and bearings, however, the roller structure in the related art is easy to cause roller jam or shake under the condition of low flow rate of the medical infusion pump, the pump body accuracy and the service life of the rollers are affected, and under the condition of high flow rate, the rollers shake seriously, so that the pump body accuracy is affected, and noise is generated.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a roller structure and a medical infusion pump that enable smooth rotation of the roller.

To achieve the above object, an embodiment of the present application provides a roller structure for a medical infusion pump, including:

the mounting main body comprises a cover body, a plurality of mounting shafts and a plurality of first limiting units, and two opposite ends of each mounting shaft along the axial direction are connected with the cover body;

the roller assemblies are in one-to-one correspondence with the mounting shafts, each roller assembly comprises a roller and a bearing structure, each bearing structure comprises an inner ring unit and an outer ring unit capable of rotating relative to the inner ring unit, each roller assembly is sleeved on the corresponding mounting shaft through the corresponding bearing structure, the inner ring unit is adjacent to the opposite sides of the cover body and is respectively abutted with the cover body through a first limiting unit, the outer ring unit is not contacted with the mounting body, so that the inner ring unit is axially limited, and the outer ring unit is axially suspended, so that the rollers sleeved on the periphery of the outer ring unit can freely rotate.

Another embodiment of the present application provides a medical infusion pump for mating with a fluid line, comprising:

a housing having a rolled wall;

the roller structure is arranged on one side of the rolling wall, and a mounting channel for clamping the liquid pipe is defined between the roller and the rolling wall;

and the driving assembly is in driving connection with the roller structure, and the driving assembly drives the roller structure to rotate so that the roller extrudes the liquid pipe to drive the fluid in the liquid pipe to flow.

The embodiment of the application provides a gyro wheel structure and medical filling pump, the gyro wheel structure includes the installation main part and with a plurality of gyro wheel components of each installation axle one-to-one, the installation main part includes the lid, a plurality of installation axle and a plurality of first spacing unit, each installation axle is all connected with the lid along axial opposite ends, the gyro wheel component includes roller and bearing structure, bearing structure includes the inner circle unit and can be for the outer lane unit of inner circle unit pivoted, the relative both sides of the adjacent lid of inner circle unit are respectively through a first spacing unit and lid butt, and outer lane unit is not contacted with the installation bulk phase, owing to the lid utilizes first spacing unit to support the inner circle unit tightly, so, the bearing structure can not follow the axial motion of installation axle at the roller, the condition that rocks can not appear in the rolling process of roller, simultaneously, because any position of installation main part all is not contacted with the outer lane unit axial unsettled setting, so, at the rolling process of roller, outer lane unit can freely rotate, and the condition that can not appear contacting with the installation main part, consequently, the roller also can freely rotate, and the condition of blocking can not appear, and the condition of blocking can be guaranteed in the medical filling pump under the circumstances that can be guaranteed in the application smoothly.

Drawings

Fig. 1 is a schematic structural view of a medical infusion pump according to an embodiment of the present application;

FIG. 2 is a schematic view of the roller structure shown in FIG. 1;

FIG. 3 is an exploded view of the roller structure shown in FIG. 2;

FIG. 4 is a schematic view of the roller shown in FIG. 3;

FIG. 5 is a schematic view of the roll shell of FIG. 1;

FIG. 6 is a cross-sectional view of the roller structure shown in FIG. 2;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

FIG. 8 is an enlarged view of a portion of a second roller structure according to an embodiment of the present application, the enlarged portion being the same as the portion A of FIG. 6;

FIG. 9 is a cross-sectional view of a third roller configuration according to an embodiment of the present application;

fig. 10 is a cross-sectional view of a fourth roller structure according to an embodiment of the present application.

Description of the reference numerals

A medical infusion pump 100; a roller structure 10; a mounting body 11; a cover 111; a first cover plate 1111; a second cover plate 1112; a mounting shaft 112; a first limiting unit 113; a first abutting portion 1131; a second abutting portion 1132; a movable stopper 1133; a fixed stop 1134; a roller assembly 12; a roller 121; an intermediate section 121a; a reducing section 121b; a bearing structure 122; a bearing 122a; an inner ring unit 1221; an inner ring 1221a; an outer ring unit 1222; outer ring 1222a; a second limiting unit 13; a housing 20; a mounting channel 20a; a main casing 21; rolling the shell 22; rolling the wall 22a; an intermediate sub-wall 22a1; inclined sub-wall 22a2; a liquid pipe 200.

Detailed Description

In the description of the embodiments of the present application, it should be noted that, the azimuth or positional relationship indicated by the term "axial direction" or the like is based on the azimuth or positional relationship shown in fig. 2, these azimuth terms are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the embodiments of the present application.

An embodiment of the present application provides a roller structure 10 for a medical infusion pump 100, referring to fig. 2-4, 6 and 7, the roller structure 10 includes a mounting body 11 and a plurality of roller assemblies 12.

The mounting body 11 includes a cover 111, a plurality of mounting shafts 112, and a plurality of first stopper units 113, and opposite ends of each mounting shaft 112 in the axial direction are connected to the cover 111.

The mounting shaft 112 in fig. 2 is detachably connected to the cover 111, that is, the mounting shaft 112 and the cover 111 may be assembled together or separated from each other, and in some embodiments, the mounting shaft 112 may be fixed to the mounting shaft 112 by welding, bonding, or the like, or the mounting shaft 112 may be integrally formed with the mounting shaft 112.

The roller assemblies 12 are in one-to-one correspondence with the mounting shafts 112, that is, the roller assemblies 12 are identical in number with the mounting shafts 112, and each mounting shaft 112 is provided with one roller assembly 12. The roller assembly 12 includes a roller 121 and a bearing structure 122, the bearing structure 122 includes an inner ring unit 1221 and an outer ring unit 1222 capable of rotating relative to the inner ring unit 1221, the roller assembly 12 is sleeved on the corresponding mounting shaft 112 through the bearing structure 122, opposite sides of the inner ring unit 1221 adjacent to the cover 111 are respectively abutted to the cover 111 through a first limiting unit 113, and the outer ring unit 1222 is not contacted with the mounting body 11, so as to axially limit the inner ring unit 1221, and the outer ring unit 1222 is suspended axially, so that the roller 121 sleeved on the circumference side of the outer ring unit 1222 can rotate freely.

That is, the cover 111 abuts the inner ring unit 1221 with the first stopper unit 113 so that the bearing structure 122 does not move in the axial direction of the mounting shaft 112, and at the same time, any portion of the mounting body 11 does not contact the outer ring unit 1222, and the outer ring unit 1222 does not interfere with the mounting body 11 during rotation with respect to the inner ring unit 1221.

The present embodiment also provides a medical infusion pump 100 for cooperating with a liquid tube 200, referring to fig. 1 and 5, the medical infusion pump 100 includes a housing 20, a driving assembly, and a roller structure 10 according to any of the embodiments of the present application. The shell 20 is provided with a rolling wall 22a, the roller structure 10 is arranged on one side of the rolling wall 22a, a mounting channel 20a for sandwiching the liquid pipe 200 is defined between the roller 121 and the rolling wall 22a, a driving assembly is in driving connection with the roller structure 10, and the driving assembly drives the roller structure 10 to rotate, so that the roller 121 presses the liquid pipe 200 to drive the fluid in the liquid pipe 200 to flow.

In the related art, the inner ring unit of the bearing structure is generally simply sleeved on the corresponding mounting shaft, and the roller is easy to generate two conditions in the rotating process, one is that the bearing structure slightly moves along the axial direction of the mounting shaft, so that the roller can shake along with the bearing structure, and the other is that the outer ring unit of the roller contacts with the cover body in the rotating process, so that the roller is blocked.

In the roller assembly 12 of the embodiment of the present application, the inner ring unit 1221 is abutted to the cover 111 by a first limiting unit 113 respectively on opposite sides of the cover 111, and the outer ring unit 1222 is not contacted with the mounting main body 11, because the cover 111 abuts the inner ring unit 1221 by the first limiting unit 113, the bearing structure 122 does not move along the axial direction of the mounting shaft 112 during the rotation process of the roller 121, and the roller 121 does not shake, and meanwhile, since any part of the mounting main body 11 is not contacted with the outer ring unit 1222, the outer ring unit 1222 is suspended in the axial direction, so that the outer ring unit 1222 can rotate freely during the rotation process of the roller 121 without contacting with the mounting main body 11, and therefore, the roller 121 can also rotate freely without jamming, that is, the roller structure 10 of the embodiment of the present application can better prevent the roller 121 from shaking and jamming during the rotation process, thereby ensuring that the roller 121 can rotate smoothly at various flow rates of the medical infusion pump 100.

In an embodiment, referring to fig. 2, 3 and 6, the cover 111 may be provided with a first cover 1111 and a second cover 1112 that are connected to each other, the mounting shaft 112 is connected to the first cover 1111 and the second cover 1112, one side of the inner ring unit 1221 adjacent to the first cover 1111 is abutted to the first cover 1111 through a first limiting unit 113, and one side of the inner ring unit 1221 adjacent to the second cover 1112 is abutted to the second cover 1112 through another first limiting unit 113. That is, the cover 111 may be assembled by the first cover 1111 and the second cover 1112 to facilitate the disassembly and assembly of the cover 111 and the roller assembly 12.

In addition, the mounting shaft 112 in fig. 3 is detachably connected to the first cover plate 1111 and the second cover plate 1112, respectively, and in some embodiments, the mounting shaft 112 may be fixed to the first cover plate 1111 or the second cover plate 1112 by welding, bonding, or the like, or the mounting shaft 112 may be integrally formed with the first cover plate 1111 or the second cover plate 1112.

In one embodiment, the rollers 121 may be an interference fit with the outer race 1222a, that is, the rollers 121 may be integrally formed with the outer race 1222a to further improve the rotational stability of the rollers 121.

In an embodiment, referring to fig. 5 and 6, a radial maximum radius of the first limiting unit 113 is greater than a minimum radius of the inner ring unit 1221 and less than a minimum radius of the outer ring unit 1222, so that the inner ring unit 1221 axially realizes axial limiting and the outer ring unit 1222 is axially suspended.

That is, the first stopper unit 113 can abut against the inner ring unit 1221 and does not contact the outer ring unit 1222, and thus, the inner ring unit 1221 can realize axial stopper, and the outer ring unit 1222 can be ensured not to contact the mounting body 11.

In an embodiment, referring to fig. 5 and 6, the first limiting unit 113 includes a first abutting portion 1131 disposed on the cover 111 and facing an axial end face of the inner ring unit 1221.

In fig. 6, the first contact portion 1131 is integrally formed with the cover 111, and in other embodiments, the first contact portion 1131 and the cover 111 may be two separate members, and the first contact portion 1131 may be fixed to the cover 111 by welding, bonding, or the like.

The first abutting portion 1131 in fig. 6 directly abuts against the inner ring unit 1221 to play a role of axial limitation on the inner ring unit 1221.

In some embodiments, the first limiting unit 113 may further provide other abutments between the first abutment 1131 and the inner ring unit 1221, which abut against the first abutment 1131 and the inner ring unit 1221, respectively.

In another embodiment, referring to fig. 8, the first limiting unit 113 may also include a second abutting portion 1132 disposed on the inner ring unit 1221 and beyond the axial end surface of the outer ring unit 1222, that is, the second abutting portion 1132 protrudes from the axial end surface of the outer ring unit 1222 to the outside of the outer ring unit 1222.

In fig. 8, the second abutting portion 1132 is integrally formed with the inner ring unit 1221, and in other embodiments, the second abutting portion 1132 and the inner ring unit 1221 may be two separate components, and the second abutting portion 1132 may be fixed on the cover 111 by welding, bonding, or the like.

The second contact portion 1132 in fig. 8 directly contacts the cover 111, and may also serve as an axial limit for the inner ring unit 1221.

In some embodiments, the first limiting unit 113 may also be provided with the first abutting portion 1131 and the second abutting portion 1132 at the same time, the first abutting portion 1131 abuts against the second abutting portion 1132, or the first limiting unit 113 may be provided with other abutting pieces, which may abut against the second abutting portion 1132 and the cover 111, respectively, for the mounting body 11 where the first abutting portion 1131 is not provided, and may abut against the second abutting portion 1132 and the first abutting portion 1131, respectively, for the mounting body 11 where the first abutting portion 1131 is provided.

In an embodiment, referring to fig. 3, 6 and 7, the bearing structure 122 may be provided with two bearings 122a, each bearing 122a includes an inner ring 1221a and an outer ring 1222a, the inner rings 1221a of the two bearings 122a together form an inner ring unit 1221, the outer rings 1222a of the two bearings 122a together form an outer ring unit 1222, the mounting body 11 further includes a second limiting unit 13, and the second limiting unit 13 is located between the two bearings 122a and is used to cooperate with the first limiting unit 113 in the axial direction to realize the axial limiting of the inner ring unit 1221.

That is, the inner rings 1221a of the two bearings 122a respectively abut against the second stopper units 13, and each bearing 122a is clamped between the first stopper unit 113 and the second stopper unit 13.

The second limiting unit 13 in fig. 6 is detachably sleeved on the mounting shaft 112, that is, the second limiting unit 13 may be removed from the mounting shaft 112, in other embodiments, the second limiting unit 13 may be fixed on the mounting shaft 112, for example, the second limiting unit 13 may be fixed on the mounting shaft 112 by welding, bonding, or the like, or may be integrally formed with the mounting shaft 112.

In some embodiments, the second limiting unit 13 may not be provided, that is, the two bearings 122a may be in direct contact.

Further, referring to fig. 6, for the cover 111 provided with the first cover 1111 and the second cover 1112, the first cover 1111 may abut against the inner ring 1221a of the roller assembly 12 adjacent to the bearing 122a of the first cover 1111 through one first limiting unit 113, and the second cover 1112 may abut against the inner ring 1221a of the roller assembly 12 adjacent to the bearing 122a of the second cover 1112 through the other first limiting unit 113.

In an embodiment, referring to fig. 9, the first limiting unit 113 may be provided with a movable limiting member 1133 detachably sleeved on the mounting shaft 112, that is, the movable limiting member 1133 may be removed from the mounting shaft 112.

The bearing structure 122 shown in fig. 9 is actually just a bearing, in fig. 9, two movable limiting parts 1133 are disposed on two opposite sides, adjacent to the cover 111, of the inner ring unit 1221, meanwhile, two first abutting parts 1131 are disposed on the cover 111, two first abutting parts 1131 are respectively disposed on two opposite sides, of the inner ring unit 1221, one end of each movable limiting part 1133 abuts against the inner ring unit 1221, the other end of each movable limiting part 1133 abuts against the corresponding first abutting part 1131, and in some embodiments, the first abutting parts 1131 may not be disposed, for example, the other end of each movable limiting part 1133 may directly abut against the cover 111.

In some embodiments, referring to fig. 10, the first limiting unit 113 may also be provided with a movable limiting member 1133 and a fixed limiting member 1134, where the movable limiting member 1133 may be disposed on one side of the inner ring unit 1221 adjacent to the cover 111, the fixed limiting member 1134 may be disposed on the other side of the inner ring unit 1221 adjacent to the cover 111, and the fixed limiting member 1134 is fixed on the mounting shaft 112, for example, the fixed limiting member 1134 may be fixed on the mounting shaft 112 by welding, bonding, or the like, or may be integrally formed with the mounting shaft 112, which is equivalent to using the fixed limiting member 1134 to replace one of the movable limiting members 1133 in fig. 9.

In addition, for the bearing structure 122 provided with two bearings 122a, a movable stopper 1133 may be provided, or a movable stopper 1133 and a fixed stopper 1134 may be provided.

In one embodiment, referring to fig. 4 and 5, the roller 121 includes two reducing segments 121b disposed along the axial direction and a middle segment 121a disposed between the two reducing segments 121b, and the reducing segments 121b gradually shrink from a side near the middle segment 121a toward a side away from the middle segment 121a, that is, the roller 121 may be disposed in a structure with a relatively larger middle and a relatively smaller end. The rolling wall 22a has an inclined sub-wall 22a2 facing the reducing section 121b and an intermediate sub-wall 22a1 facing the intermediate section 121a, the distance between the reducing section 121b and the inclined sub-wall 22a2 being greater than the distance between the intermediate section 121a and the intermediate sub-wall 22a 1.

The distance between the reducing section 121b and the inclined sub-wall 22a2 is set to be larger than the distance between the intermediate section 121a and the intermediate sub-wall 22a1 in order that the portion of the roller 121 between the reducing section 121b and the inclined sub-wall 22a2 where the liquid pipe 200 is located is not pressed too tightly during the process of pressing the liquid pipe 200, whereby the wear of the liquid pipe 200 can be reduced, and the service life of the liquid pipe 200 can be improved.

In addition, referring to fig. 5, the housing 20 may be provided with a main housing 21 and a roll housing 22 having a roll wall 22a, and the roll housing 22 may be detachably coupled to the main housing 21, whereby the roll wall 22a may be easily processed.

In the description of the present application, reference to the terms "one embodiment," "in some embodiments," "in other embodiments," or "exemplary" and the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments. In this application, the schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples described herein, as well as the features of the various embodiments or examples, may be combined by those skilled in the art without contradiction.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application are included in the protection scope of the present application.

Claims (15)

1. A roller structure for a medical infusion pump, comprising:

the mounting main body comprises a cover body, a plurality of mounting shafts and a plurality of first limiting units, and two opposite ends of each mounting shaft along the axial direction are connected with the cover body;

the roller assemblies are in one-to-one correspondence with the mounting shafts, each roller assembly comprises a roller and a bearing structure, each bearing structure comprises an inner ring unit and an outer ring unit capable of rotating relative to the inner ring unit, each roller assembly is sleeved on the corresponding mounting shaft through the corresponding bearing structure, the inner ring unit is adjacent to the opposite sides of the cover body and is respectively abutted with the cover body through a first limiting unit, the outer ring unit is not contacted with the mounting body, so that the inner ring unit is axially limited, and the outer ring unit is axially suspended, so that the rollers sleeved on the periphery of the outer ring unit can freely rotate.

2. The roller structure of claim 1, wherein a radial maximum radius of the first limiting unit is greater than a minimum radius of the inner ring unit and less than a minimum radius of the outer ring unit, so that the inner ring unit is axially limited and the outer ring unit is axially suspended.

3. The roller structure according to claim 1 or 2, characterized in that the first stopper unit includes a first abutment provided on the cover body toward an axial end face of the inner ring unit; or alternatively, the first and second heat exchangers may be,

the first limiting unit comprises a second abutting part which is arranged on the inner ring unit and exceeds the axial end face of the outer ring unit.

4. The roller structure according to claim 1 or 2, wherein the first limiting unit includes a movable limiting member detachably sleeved on the mounting shaft.

5. The roller structure according to claim 1 or 2, wherein the first limiting unit of one side of the inner ring unit adjacent to the cover body includes a movable limiting member detachably sleeved on the mounting shaft, and wherein the first limiting unit of the other side includes a fixed limiting member fixed on the mounting shaft.

6. The roller structure of claim 5, wherein the fixed stop is integrally formed with the mounting shaft.

7. The roller structure according to claim 1 or 2, wherein the cover body includes a first cover plate and a second cover plate that are connected to each other, the mounting shaft is connected to the first cover plate and the second cover plate, respectively, one side of the inner ring unit adjacent to the first cover plate is abutted to the first cover plate through one of the first limiting units, and one side of the inner ring unit adjacent to the second cover plate is abutted to the second cover plate through the other of the first limiting units.

8. The roller structure according to claim 1 or 2, characterized in that the bearing structure comprises two bearings, each of which comprises an inner ring and an outer ring, the inner rings of the two bearings together forming the inner ring unit, the outer rings of the two bearings together forming the outer ring unit, the mounting body further comprising a second limiting unit located between the two bearings for axially co-operating with the first limiting unit for axial limiting of the inner ring unit.

9. The roller structure according to claim 8, wherein the second limiting unit is detachably sleeved on the mounting shaft; or, the second limiting unit is fixed on the mounting shaft.

10. The roller structure of claim 8, wherein the cover includes a first cover plate and a second cover plate connected to each other, the mounting shaft is connected to the first cover plate and the second cover plate, the first cover plate is abutted to the inner ring of the bearing adjacent to the first cover plate in the roller assembly through one of the first limiting units, and the second cover plate is abutted to the inner ring of the bearing adjacent to the second cover plate in the roller assembly through the other of the first limiting units.

11. The roller structure according to claim 1 or 2, wherein the mounting shaft is detachably connected to the cover; and/or the number of the groups of groups,

the rollers are in interference fit with the outer ring.

12. A roller arrangement according to claim 1 or 2, wherein the roller comprises two reducing segments arranged in an axial direction and a middle segment between the two reducing segments, the reducing segments tapering from a side closer to the middle segment towards a side facing away from the middle segment.

13. A medical infusion pump for mating with a fluid line, comprising:

a housing having a rolled wall;

the roller structure of any one of claims 1-12, disposed on one side of the rolling wall, the roller and the rolling wall defining therebetween a mounting channel sandwiching the liquid tube;

and the driving assembly is in driving connection with the roller structure, and the driving assembly drives the roller structure to rotate so that the roller extrudes the liquid pipe to drive the fluid in the liquid pipe to flow.

14. The medical infusion pump according to claim 13, wherein the roller comprises two reducing segments arranged in an axial direction and a middle segment between the two reducing segments, the reducing segments gradually shrinking from a side near the middle segment towards a side away from the middle segment, the rolling wall having an inclined sub-wall towards the reducing segment and a middle sub-wall towards the middle segment, a distance between the reducing segments and the inclined sub-wall being greater than a distance between the middle segment and the middle sub-wall.

15. The medical infusion pump according to claim 13 or 14, wherein the housing comprises a main shell and a roll shell having the roll wall, the roll shell being removably connected to the main shell.