CN211852087U - Linkage assembly of micropump and micropump - Google Patents

Abstract

The utility model discloses a linkage subassembly and micropump of micropump, the linkage subassembly includes: the eccentric wheel is provided with an inclined hole and a shaft hole, wherein the shaft hole is connected with a motor shaft of the micro pump; the isolating piece is embedded in the inclined hole and forms a slot; the steel needle, the steel needle is rotatably located in the slot, the steel needle is located the part in the slot is equipped with first oil groove. According to the utility model discloses linkage subassembly of miniature air pump sets up the separator and sets up first oil groove on the steel needle through the inclined hole at the eccentric wheel to reduce the frictional force between steel needle and the eccentric wheel and reduce the produced heat of steel needle in the motion process, and then prolong linkage subassembly's life.

Description

Linkage assembly of micropump and micropump

Technical Field

The utility model relates to a pump technical field, more specifically relates to a linkage subassembly and micropump of micropump.

Background

In the related art, the eccentric wheel in the linkage assembly of the micro pump and the steel needle rub against each other for a long time, so that the eccentric wheel made of plastic is abraded, and the service life of the micro pump is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of above-mentioned technical problem to a certain extent at least.

Therefore, the utility model provides a linkage subassembly of micropump, this linkage subassembly's long service life.

The utility model discloses still provide a micropump that has above-mentioned linkage subassembly, this micropump's long service life.

The utility model discloses linkage subassembly of micropump, include: the eccentric wheel is provided with an inclined hole and a shaft hole, and the central shaft of the inclined hole is intersected with the central shaft of the shaft hole, wherein the shaft hole is connected with a motor shaft of the micro pump; the isolating piece is embedded in the inclined hole and forms a slot; the steel needle, the steel needle is rotatably located in the slot, the steel needle is located the part in the slot is equipped with first oil groove.

According to the utility model discloses linkage subassembly of miniature air pump sets up the separator and sets up first oil groove on the steel needle through the inclined hole at the eccentric wheel to reduce the frictional force between steel needle and the eccentric wheel and reduce the produced heat of steel needle in the motion process, and then prolong linkage subassembly's life.

In addition, according to the utility model discloses micropump, can also have following additional technical characterstic:

in some embodiments of the present invention, the axial length of the spacer is equal to the hole depth of the inclined hole.

In some embodiments of the present invention, the slot wall of the slot is provided with a second oil groove recessed from outside to inside, and the groove depth of the second oil groove is greater than the groove depth of the slot.

In an optional embodiment, a third oil groove is formed in the groove bottom of the slot, and the third oil groove penetrates through the thickness of the groove bottom of the slot.

In a further optional embodiment, the eccentric wheel is provided with an exhaust hole, and the exhaust hole and the third oil groove are arranged in a staggered mode in the axial direction.

In some embodiments of the present invention, at least a portion of the outer peripheral wall of the eccentric wheel is provided with a heat dissipation structure, and the heat dissipation structure surrounds the circumferential direction of the inclined hole.

In an alternative embodiment, the heat dissipation structure is a concave surface and a convex surface which are arranged at intervals.

In an alternative example, the concave surface and the convex surface extend in an axial direction of the eccentric wheel.

In some embodiments of the present invention, the inclined hole is located at one side of the shaft hole, and the other side of the shaft hole is provided with a counterweight groove.

In some embodiments of the present invention, the spacer is a metal member or a wear-resistant plastic member.

According to the utility model discloses the micropump includes the linkage subassembly of above-mentioned embodiment, because according to utility model embodiment's linkage subassembly long service life, consequently, according to utility model embodiment's the long service life of micropump.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a top view cross-sectional view of a linkage assembly of a micro-pump according to some embodiments of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is a perspective view of a linkage assembly of a micro-pump according to some embodiments of the present invention.

Reference numerals:

a linkage assembly 100;

an eccentric wheel 10; a shaft hole 12; an exhaust hole 13; a heat dissipation structure 14; a concave surface 141; a convex surface 142; a counterweight groove 143;

a spacer 20; a second oil groove 211; a third oil groove 212;

a steel needle 30; first oil groove 31.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Referring now to fig. 1-4, a linkage assembly 100 for a micro-pump according to some embodiments of the present invention is described. The linkage assembly 100 is used to connect a motor (not shown in the drawings) of the micro-pump and an air bag (not shown in the drawings), and the motor drives the linkage assembly 100 to move so as to drive the air bag to suck and exhaust air.

As shown in fig. 1 in conjunction with fig. 2, the linkage assembly 100 includes an eccentric 10, a spacer 20, and a steel needle 30. The isolation member 20 may be a metal member or a wear-resistant plastic member. The metal piece and the wear-resistant plastic piece have better wear resistance and can resist the friction force of the steel needle.

Specifically, the eccentric wheel 10 is provided with an inclined hole and a shaft hole 12, and an extension line of a central axis of the inclined hole intersects with an extension line of a central axis of the shaft hole 12. For example, the angle between the central axis of the inclined hole and the extension line of the central axis of the shaft hole 12 is acute, or the angle between the central axis of the inclined hole and the extension line of the central axis of the shaft hole 12 is obtuse. Thus, the steel needle 30 can make eccentric motion deviating from the motor shaft under the driving of the eccentric wheel 10, thereby driving the air bag to move up and down.

As shown in fig. 2 and fig. 3, the spacer 20 is embedded in the inclined hole, and the spacer 20 forms a slot. The steel needle 30 is rotatably arranged in the slot, and a first oil groove 31 is arranged on the part of the steel needle 30 in the slot. Namely, the spacer 20 is arranged between the outer wall surface of the steel needle 30 and the wall of the inclined hole, in other words, the steel needle 30 with higher hardness does not directly act on the eccentric wheel 10, so that under the condition that the shaft hole 12 is connected with the motor shaft of the micropump and the steel needle 30 is connected with the air bag, the eccentric wheel 10 drives the air bag to swing up and down, thereby realizing air suction and air exhaust of the air bag. During the rotation of the steel needle 30, the lubricant in the first oil groove 31 can be released slowly to lubricate the contact surface between the isolating part 20 and the steel needle 30, thereby reducing the friction force during the movement of the steel needle 30 and reducing the release of heat.

It will be understood by those skilled in the art that one end of the steel needle 30 is connected to the eccentric wheel 10, and the other end of the steel needle 30 is connected to a connecting rod made of plastic material, which is connected to the air bag. Therefore, the heat generated from the steel needle 30 is transferred to the connecting rod, and in case that the heat of the steel needle 30 is high, the connecting rod may be melted by high temperature, so that the micro pump may not work normally. Therefore, it is important to reduce the heat generated by the steel needle 30 during the movement process in the design process of the micro-pump.

In short, according to the utility model discloses linkage assembly 100 of miniature air pump is through setting up isolation part 20 in the inclined hole of eccentric wheel 10 and set up first oil groove 31 on steel needle 30 to reduce the frictional force between steel needle 30 and the eccentric wheel 10 and reduce the produced heat of steel needle 30 in the motion process, and then prolong linkage assembly 100's life.

In some embodiments of the present invention, the axial length of the spacer 20 is equal to the depth of the inclined hole. That is, the outer end face of the spacer 20 is flush with the outer end face of the inclined hole. After the steel needle 30 is inserted into the slot, the part of the steel needle 30, which is positioned in the slot, is completely covered, and the steel needle 30 can be in zero contact with the wall of the inclined hole, so that the steel needle 30 only contacts with the wall of the slot in the motion process, and the abrasion to the eccentric wheel 10 is reduced.

Alternatively, as shown in fig. 1 in combination with fig. 2 and 3, the groove wall of the slot is provided with a second oil groove 211 recessed from outside to inside, and the groove depth of the second oil groove 211 is greater than that of the slot. In other words, the groove bottom surface of second oil groove 211 is lower than the groove bottom surface of insert 21, so that as much lubricating oil as possible can be stored in second oil groove 211. The second oil groove 211 surrounds the circumference of the steel needle 30 to lubricate the circumference wall of the steel needle 30, and the oil quantity at the groove bottom of the second oil groove 211 can also lubricate the bottom surface of the steel needle 30.

Further alternatively, as shown in fig. 2 and 3, the groove bottom of the slot is provided with a third oil groove 212, and the third oil groove 212 penetrates through the thickness of the groove bottom of the slot. By storing a certain amount of oil in the third oil groove 212, the lubricating oil can be flushed out from the third oil groove 212 during the synchronous motion of the eccentric wheel 10 and the steel needle 30, so that the surface of the steel needle 30 is effectively lubricated.

In a further alternative example, the eccentric wheel 10 is provided with a vent hole 13, and the vent hole 13 is arranged offset from the third oil groove 212 in the axial direction. When the isolating piece 20 is pressed into the inclined hole, gas in the inclined hole can be discharged from the exhaust hole 13, so that the eccentric wheel 10 is prevented from being deformed due to overlarge pressure, and the structural strength of the eccentric wheel 10 is ensured to be unchanged.

In other embodiments of the present invention, as shown in fig. 1 and fig. 4, at least a portion of the outer peripheral wall of the eccentric wheel 10 is provided with a heat dissipation structure 14, and the heat dissipation structure 14 is disposed around the circumference of the inclined hole. In this way, the heat generated by the friction between the steel needle 30 and the spacer 20 can be dissipated outwards through the heat dissipation structure 14, so as to prevent the eccentric wheel 10 or the connecting rod from being melted due to the overhigh temperature of the linkage assembly 100.

Optionally, the heat dissipation structure 14 is a concave surface 141 and a convex surface 142 arranged at an interval. That is, the concave surface 141 and the convex surface 142 are disposed adjacent to each other at an interval, thereby increasing the heat dissipation area of the heat dissipation structure 14.

Further alternatively, the concave surface 141 and the convex surface 142 extend in the axial direction of the eccentric 10. Namely, the extension length of the heat dissipation structure 14 is substantially the same as the extension length of the steel needle 30, so as to further improve the heat dissipation capability of the heat dissipation structure 14.

In other embodiments of the present invention, the inclined hole is located at one side of the shaft hole 12, and the other side of the shaft hole 12 is provided with a counterweight groove 143. A counterweight ball, such as a steel ball, may be disposed in the counterweight groove 143. Namely, the acting force of the steel needle 30 acting in the inclined hole is balanced by the steel balls, and the balance of the eccentric wheel 10 in the horizontal direction is ensured.

According to the utility model discloses micropump includes the linkage subassembly 100 of above-mentioned embodiment, because according to utility model embodiment's linkage subassembly 100's long service life, consequently, according to utility model embodiment's long service life of micropump.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to 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.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims (11)

1. A linkage assembly for a micropump, comprising:

the eccentric wheel is provided with an inclined hole and a shaft hole, wherein the shaft hole is connected with a motor shaft of the micro pump;

the isolating piece is embedded in the inclined hole and forms a slot;

the steel needle, the steel needle is rotatably located in the slot, the steel needle is located the part in the slot is equipped with first oil groove.

2. A linkage assembly according to claim 1, wherein the axial length of the spacer is equal to the depth of the angled bore.

3. The linkage assembly according to claim 1, wherein the slot wall of the slot is provided with a second oil groove recessed from the outside to the inside, and the groove depth of the second oil groove is greater than that of the slot.

4. The linkage assembly according to claim 3, wherein the slot bottom is provided with a third oil groove extending through the thickness of the slot bottom.

5. A linkage assembly according to claim 4, wherein the eccentric is provided with a vent hole which is offset from the third oil groove in the axial direction.

6. The linkage assembly according to claim 1, wherein at least a portion of the peripheral wall of the eccentric is provided with a heat dissipating structure disposed around the circumference of the inclined hole.

7. The linkage assembly according to claim 6, wherein the heat dissipating structure is spaced concave and convex.

8. A linkage assembly according to claim 7, wherein said concave surface and said convex surface extend in an axial direction of said eccentric.

9. The linkage assembly of claim 1, wherein the inclined hole is formed at one side of the shaft hole, and a weight groove is formed at the other side of the shaft hole.

10. A linkage assembly according to claim 1, wherein said spacer is a metal or wear-resistant plastic member.

11. A micropump, characterized in that it comprises a linkage assembly according to any one of claims 1-10.

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