CN215890391U - Double-connecting-rod structure for micro pump - Google Patents
Double-connecting-rod structure for micro pump Download PDFInfo
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- CN215890391U CN215890391U CN202121980293.6U CN202121980293U CN215890391U CN 215890391 U CN215890391 U CN 215890391U CN 202121980293 U CN202121980293 U CN 202121980293U CN 215890391 U CN215890391 U CN 215890391U
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Abstract
The utility model discloses a double-connecting-rod structure for a micropump, which mainly solves the problems that the connecting rod of the conventional micropump in the prior art is large in size and large in internal space required by the movement of the connecting rod. The utility model comprises a first connecting rod, a connecting piece, a driving motor, an eccentric wheel, a lower bearing and a second connecting rod; an upper through hole and a lower through hole are respectively arranged along the height direction of the first connecting rod; the second connecting rod comprises a left shell and a right shell, the left shell is provided with a left through hole communicated with the left side and the right side of the left shell, and the right shell is provided with a right through hole communicated with the left side and the right side of the right shell; the first connecting rod is positioned between the left shell and the right shell, the connecting piece penetrates through the upper through hole, and two ends of the connecting piece are respectively connected to the opposite surfaces of the left shell and the right shell; the driving motor and the eccentric wheel are respectively positioned on two opposite sides of the left shell and the right shell, and the eccentric wheel is connected with a rotating shaft of the driving motor. Through the scheme, the utility model achieves the purposes of small size of the connecting rod and small movement space.
Description
Technical Field
The utility model relates to the technical field of equipment for a micro pump, in particular to a double-connecting-rod structure for the micro pump.
Background
The micropump is more and more widely applied due to the characteristics of small volume, easy installation, high vacuum degree and high pressure. Continuing to reduce the size of micropumps has always been a design focus, while maintaining equal efficiency.
The micro pump drives the eccentric wheel and other revolution bodies to rotate by the motor shaft, and the revolution bodies drive the connecting rod to move to drive the diaphragm, so that the revolution motion of the motor shaft is converted into the reciprocating motion of the diaphragm.
In practice, to achieve higher relative pressures or greater flow rates, two or more diaphragms are typically connected in series or in parallel. The existing double-connecting-rod structure in the market is mostly a staggered structure, namely two independent connecting rods are arranged on the same motor shaft side by side, and the motion axis planes of the motion axes of the two connecting rods are mostly parallel and do not coincide; the motion axis is an axis which passes through the intersection point of the connecting rod and the center of the diaphragm and is always kept vertical, the vertical direction is a direction perpendicular to the motor shaft, and the plane of the motion axis is a plane which takes the direction of the motor shaft as a normal vector and passes through the motion axis.
The double-connecting-rod structure of the existing micropump mostly adopts a side-by-side dislocation design, and has the following three problems:
1. the connecting rod moves up and down in a large space, which results in a large volume of the micro pump.
2. The two connecting rods are arranged side by side in the direction perpendicular to the motor shaft, so that the size of the micro pump in the direction of the motor shaft is increased.
3. The connecting rod occupies a large space and has a not compact structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a double-connecting-rod structure for a micropump, which solves the problems that the connecting rod of the traditional micropump is large in size, large in internal space required by the movement of the connecting rod and the like.
In order to solve the above problems, the present invention provides the following technical solutions:
a double-connecting-rod structure for a micropump comprises a first connecting rod, a connecting piece, a driving motor, an eccentric wheel, a lower bearing and a second connecting rod; an upper through hole and a lower through hole are respectively arranged along the height direction of the first connecting rod; the second connecting rod comprises a left shell and a right shell, the left shell is provided with a left through hole communicated with the left side and the right side of the left shell, and the right shell is provided with a right through hole communicated with the left side and the right side of the right shell; the first connecting rod is positioned between the left shell and the right shell, the connecting piece penetrates through the upper through hole, and two ends of the connecting piece are respectively connected to the opposite surfaces of the left shell and the right shell; the driving motor and the eccentric wheel are respectively positioned on two opposite sides of the left shell and the right shell, and the lower bearing is arranged in the lower through hole; the eccentric wheel penetrates through the left through hole, the lower through hole and the right through hole and then is connected with a motor shaft of the driving motor, and the eccentric wheel and the motor shaft are in bonding or transition fit; the first connecting rod is positioned between the left shell and the right shell, is connected with the first connecting rod and the second connecting rod through the upper through hole, the lower through hole, the left through hole and the right through hole and is connected with the driving motor and the eccentric wheel, so that the structure of the utility model is more compact, and the space required by the connecting rod to move upwards and downwards is reduced under the condition of keeping the original transmission efficiency.
Further, a first upper pressure plate and a second upper pressure plate are sequentially fixed at the top of the first connecting rod; the area of the first upper pressing plate is larger than that of the second upper pressing plate; an upper diaphragm is arranged between the first upper pressure plate and the second upper pressure plate.
Further, a dual link structure for micro-pump: the device also comprises a first lower pressing plate and a second lower pressing plate; the left shell and the right shell are vertically and parallelly fixed on the first lower pressure plate; the second lower pressing plate is fixed at the bottom of the first lower pressing plate, and a lower diaphragm is connected between the first lower pressing plate and the second lower pressing plate.
Furthermore, when the motor works, the center hole of the upper diaphragm and the axis of the first connecting rod form an intersection point, the intersection point is positioned on a vertical line vertical to the motor shaft, and the vertical line is the first axis; when the diaphragm valve works, the central hole of the lower diaphragm and the axis of the second connecting rod form an intersection point, the intersection point is positioned on a vertical line vertical to the axis of the motor, and the vertical line is a second axis; the planes of the two motion axes respectively determined by the first axis and the second axis are mutually overlapped or close to each other; the motion axis plane is a plane which takes the axial direction of a motor shaft of the driving motor as a normal vector and passes through the first axis or the second axis; the axes of the diaphragms at the two ends are kept on the same axis, so that the axial space size of the motor is reduced.
Furthermore, the second upper pressure plate and the second upper diaphragm and the second lower pressure plate and the second lower diaphragm are connected in any one of the connection modes of up-down compression connection, threaded connection and integrated forming.
Furthermore, when the driving motor drives the eccentric wheel to rotate, the eccentric wheel is not contacted with the inner edges of the left through hole and the right through hole.
Furthermore, a plurality of groups of mutually matched connecting rods and connecting holes are respectively arranged on the opposite surfaces of the left shell and the right shell, and the connecting rods and the connecting holes are connected in an interference fit or bonding mode; generally, the left and right housings are arranged on the opposite surfaces of the left and right housings in an up-down and left-right selective manner.
Furthermore, the outer contour of the left shell and the right shell is any one of diamond, square, circle and polygon; other shapes may be selected.
Furthermore, the outer contour of the first connecting rod is any one of splayed shape, circular shape, square shape and diamond shape; other shapes may be selected.
Furthermore, the upper diaphragm and the lower diaphragm are elastic bodies in any shape of a circular ring, a plane circular ring, a curved circular ring, a plane square and a curved square.
Compared with the prior art, the utility model has the following beneficial effects:
(1) according to the utility model, the first connecting rod is positioned between the left shell and the right shell, and is connected with the first connecting rod and the second connecting rod through the upper through hole, the lower through hole, the left through hole and the right through hole, and is connected with the driving motor and the eccentric wheel, so that the structure of the utility model is more compact, and the space required by the connecting rods to move upwards and downwards is reduced under the condition of keeping the original transmission efficiency.
(2) The axes of the diaphragms at the two ends are kept on the same axis, so that the axial space size of the motor is reduced.
(3) In the utility model, an upper through hole and a lower through hole are respectively arranged along the height direction of a first connecting rod; the second connecting rod comprises a left shell and a right shell, and a left through hole communicated with the left side and the right side of the left shell is formed in the left shell; the first connecting rod and the second connecting rod are more compact in structure and reduced in size.
Drawings
FIG. 1: the details of example 1 are shown in an exploded view;
FIG. 2: details of example 1 are shown in an isometric view;
FIG. 3: a detail of example 1 is shown in cross-section;
FIG. 4: details of the assembly of the connecting rod 1 in embodiment 1 are shown in an isometric view;
FIG. 5: details of the assembly of the tie rod 2 in embodiment 1 are shown in isometric view;
FIG. 6: the front view shows details of the right housing 22 parts of the assembly of the connecting rod 2 in embodiment 1;
FIG. 7: details of the components of the left housing 21 of the assembly of the tie rod 2 of embodiment 1 are shown in isometric view;
FIG. 8: the details of example 2 are shown in an exploded view;
FIG. 9: details of embodiment 2 are shown in isometric view;
FIG. 10: a detail of example 2 is shown in cross-section;
FIG. 11: details of the assembly of the tie rod 1 of embodiment 2 are shown in isometric view;
FIG. 12: details of the assembly of the tie rod 2 in embodiment 2 are shown in isometric view;
FIG. 13: the front view shows the details of the attachment nail 11 in embodiment 2;
in the drawings, the names of the parts corresponding to the reference numerals are as follows:
1-first connecting rod, 2-second connecting rod, 3-eccentric wheel, 301-eccentric hole, 4-upper bearing, 5-lower bearing, 6-upper diaphragm, 601-upper center hole, 7-lower diaphragm, 701-lower center hole, 8-driving motor, 801-motor shaft, 9-first axis, 10-second axis, 11-connecting nail, 12-upper through hole, 13-lower through hole, 14-second upper platen, 15-first upper platen, 20-left through hole, 21-left shell, 22-right shell, 23-second lower platen, 24-first lower platen, 25-upper boss, 26-lower boss, 27-upper hole, 28-lower hole, 29-right through hole, 41-boss face.
Detailed Description
The present invention is further illustrated by the following figures and examples, which include, but are not limited to, the following examples.
Example 1
As shown in fig. 1 to 7, a dual link structure for a micro pump includes a first link 1, a second link 2, an eccentric wheel 3, an upper bearing 4, a lower bearing 5, and a driving motor 8;
the second connecting rod 2 is a rhombic shell, and the cross sections of the right through hole 29 and the left through hole 20 on the second connecting rod 2 are both circular; the second connecting rod 2 is composed of a left shell 21 and a right shell 22, an upper boss 25 and a lower boss 26 on the left shell 21 are cylinders, an upper hole 27 and a lower hole 28 on the right shell 22 are circular through holes, and the upper boss 25 and the lower boss 26 on the left shell 21 are in interference fit with the upper hole 27 and the lower hole 28 on the right shell 22 respectively;
the outer contour of the first connecting rod 1 is splayed, an upper through hole 12 and a lower through hole 13 are formed in the first connecting rod 1 along the height direction of the first connecting rod, and the cross sections of the upper through hole and the lower through hole are both circular; the lower bearing 5 is directly molded on the lower through hole 13 as an insert; the upper bearing 4 is directly molded on the upper through hole 12 as an insert;
the first connecting rod 1 and the second connecting rod 2 are hinged through an upper bearing 4; the first connecting rod 1 is hinged with the eccentric wheel 3 through a lower bearing 5;
the eccentric wheel 3 is provided with an eccentric hole 301, and the eccentric wheel 3 is directly bonded with the motor shaft 801 through the eccentric hole 301; the upper bearing 4 is in interference fit with the boss surface 41 on the second connecting rod 2;
a second upper pressure plate 14 and a first upper pressure plate 15 are arranged above the first connecting rod 1, the first connecting rod 1 is connected with the upper diaphragm 6 in a clamping mode through the second upper pressure plate 14 and the first upper pressure plate 15, and the upper diaphragm 6 is made of an elastic body; the upper diaphragm 6 is arranged between the second upper pressing plate 14 and the first upper pressing plate 15 through an upper center hole 601, and the thickness of the upper diaphragm 6 arranged between the second upper pressing plate 14 and the first upper pressing plate 15 is slightly larger than the distance between the second upper pressing plate 14 and the first upper pressing plate 15; a second lower pressure plate 23 and a first lower pressure plate 24 are arranged below the second connecting rod 2, the second connecting rod 2 is connected with the lower diaphragm 7 in a clamping mode through the second lower pressure plate 23 and the first lower pressure plate 24, and the lower diaphragm 7 is made of an elastic body; the lower diaphragm 7 is disposed between the second lower platen 23 and the first lower platen 24 through the lower center hole 701, and the thickness of the lower diaphragm 7 disposed between the second lower platen 23 and the first lower platen 24 is slightly larger than the distance between the second lower platen 23 and the first lower platen 24.
The double-connecting-rod structure drives the eccentric wheel 3 to rotate through the driving motor 8, and when the eccentric wheel 3 rotates, the right through hole 29, the left through hole 20 and the eccentric wheel 3 are not in contact; the eccentric wheel 3 drives the first connecting rod 1 to do reciprocating motion, the first connecting rod 1 drives the second connecting rod 2 to do reciprocating motion, and finally the first connecting rod 1 and the second connecting rod 2 respectively drive the upper diaphragm 6 and the lower diaphragm 7 to do reciprocating motion along the first axis 9 and the second axis 10;
the two motion axis planes determined by the first axis 9 and the second axis 10 of the reciprocating motion of the first connecting rod 1 and the second connecting rod 2 are always coincident, wherein the first axis 9 is an axis passing through the intersection point of the axis of the first connecting rod 1 and the axis of the upper center hole 601 and always kept vertical, the second axis 10 is an axis passing through the intersection point of the axis of the second connecting rod 2 and the axis of the lower center hole 701 and always kept vertical, and the motion axis planes are two planes which take the axial direction of the motor shaft 801 as a normal vector and respectively pass through the first axis 9 and the second axis 10. The vertical direction is perpendicular to the axial direction of the motor shaft 801.
Example 2
As shown in fig. 8 to 13, a dual link structure for a micro pump includes a first link 1, a second link 2, an eccentric wheel 3, an upper bearing 4, a lower bearing 5, and a driving motor 8;
the second connecting rod 2 is a rectangular shell, and the cross sections of the right through hole 29 and the left through hole 20 on the second connecting rod 2 are rectangular; the left shell 21 and the right shell 22 on the second connecting rod 2 are formed into a whole; the left shell 21 and the right shell 22 are respectively provided with a lower hole 28 and an upper hole 27, the upper hole 27 and the lower hole 28 are circular through holes, the connecting nail 11 is provided with an upper boss 25 and a lower boss 26, the upper boss 25 and the lower boss 26 are both cylinders, and the lower boss 26 and the upper boss 25 on the connecting nail 11 are respectively in interference fit with the lower hole 28 and the upper hole 27 on the second connecting rod 2;
the boss surface 41 on the connecting nail 11 is in interference fit with the upper bearing 4;
the outer contour of the first connecting rod 1 is rectangular, an upper through hole 12 and a lower through hole 13 are formed in the first connecting rod 1 along the height direction of the first connecting rod, and the cross sections of the upper through hole and the lower through hole are both circular; the lower bearing 5 is directly molded on the lower through hole 13 as an insert; the upper bearing 4 is directly molded on the upper through hole 12 as an insert;
the first connecting rod 1 and the second connecting rod 2 are hinged through an upper bearing 4; the first connecting rod 1 is hinged with the eccentric wheel 3 through a lower bearing 5;
the eccentric wheel 3 is provided with an eccentric hole 301, and the eccentric wheel 3 is directly bonded with the motor shaft 801 through the eccentric hole 301;
a second upper pressure plate 14 and a first upper pressure plate 15 are arranged above the first connecting rod 1, the first connecting rod 1 is connected with the upper diaphragm 6 in a clamping mode through the second upper pressure plate 14 and the first upper pressure plate 15, and the upper diaphragm 6 is made of an elastic body; the upper diaphragm 6 is arranged between the second upper pressing plate 14 and the first upper pressing plate 15 through an upper center hole 601, and the thickness of the upper diaphragm 6 arranged between the second upper pressing plate 14 and the first upper pressing plate 15 is slightly larger than the distance between the second upper pressing plate 14 and the first upper pressing plate 15; a second lower pressure plate 23 and a first lower pressure plate 24 are arranged below the second connecting rod 2, the second connecting rod 2 is connected with the lower diaphragm 7 in a clamping mode through the second lower pressure plate 23 and the first lower pressure plate 24, and the lower diaphragm 7 is made of an elastic body; the lower diaphragm 7 is disposed between the second lower platen 23 and the first lower platen 24 through the lower center hole 701, and the thickness of the lower diaphragm 7 disposed between the second lower platen 23 and the first lower platen 24 is slightly larger than the distance between the second lower platen 23 and the first lower platen 24.
The double-connecting-rod structure drives the eccentric wheel 3 to rotate through the driving motor 8, and when the eccentric wheel 3 rotates, the right through hole 29, the left through hole 20 and the eccentric wheel 3 are not in contact; the eccentric wheel 3 drives the first connecting rod 1 to do reciprocating motion, the first connecting rod 1 drives the second connecting rod 2 to do reciprocating motion, and finally the first connecting rod 1 and the second connecting rod 2 respectively drive the upper diaphragm 6 and the lower diaphragm 7 to do reciprocating motion along the first axis 9 and the second axis 10;
the two motion axis planes determined by a first axis 9 and a second axis 10 of the reciprocating motion of the first connecting rod 1 and the second connecting rod 2 are always coincident, wherein the first axis 9 is an axis which passes through the intersection point of the axis of the first connecting rod 1 and the axis of the upper center hole 601 and is always vertical, the second axis 10 is an axis which passes through the intersection point of the axis of the second connecting rod 2 and the axis of the lower center hole 701 and is always vertical, and the motion axis planes are two planes which take the axial direction of the motor shaft 801 as a normal vector and respectively pass through the first axis 9 and the second axis 10; the vertical direction is perpendicular to the axial direction of the motor shaft 801.
Example 3
The present embodiment is different from embodiment 1 in that the outer contours of the left housing 21 and the right housing 22 may also be any one of a diamond shape, a square shape, a circular shape, a polygonal shape, or other shapes; the outer contour of the first connecting rod 1 can also be any one of splayed shape, circular shape, square shape and diamond shape or other shapes; the upper diaphragm 6 and the lower diaphragm 7 can be elastic bodies in any shape of a circular ring, a plane circular ring, a curved circular ring, a plane square and a curved square.
The utility model is well implemented in accordance with the above-described embodiments. It should be noted that, based on the above structural design, in order to solve the same technical problems, even if some insubstantial modifications or colorings are made on the present invention, the adopted technical solution is still the same as the present invention, and therefore, the technical solution should be within the protection scope of the present invention.
Claims (10)
1. The utility model provides a two link structure for micro-pump which characterized in that: comprises a first connecting rod (1), a connecting piece, a driving motor (8), an eccentric wheel (3), a lower bearing (5) and a second connecting rod (2); an upper through hole (12) and a lower through hole (13) are respectively arranged along the height direction of the first connecting rod (1); the second connecting rod (2) comprises a left shell (21) and a right shell (22), a left through hole (20) which is communicated with the left side and the right side of the left shell (21) is arranged on the left shell (21), and a right through hole (29) which is communicated with the left side and the right side of the right shell (22) is arranged on the right shell (22); the first connecting rod (1) is positioned between the left shell (21) and the right shell (22), the connecting piece penetrates through the upper through hole (12), and two ends of the connecting piece are respectively connected to the opposite surfaces of the left shell (21) and the right shell (22); the driving motor (8) and the eccentric wheel (3) are respectively positioned on two opposite sides of the left shell (21) and the right shell (22), and the lower bearing (5) is arranged in the lower through hole (13); the eccentric wheel (3) passes through the left through hole (20), the lower through hole (13) and the right through hole (29) and then is connected with a motor shaft (801) of the driving motor (8).
2. The dual link structure for a micro-pump according to claim 1, wherein: a first upper pressure plate (15) and a second upper pressure plate (14) are sequentially fixed at the top of the first connecting rod (1); the area of the first upper pressing plate (15) is larger than that of the second upper pressing plate (14); an upper diaphragm (6) is arranged between the first upper pressing plate (15) and the second upper pressing plate (14).
3. The dual link structure for a micro-pump according to claim 1, wherein: the device also comprises a first lower pressing plate (24) and a second lower pressing plate (23); the left shell (21) and the right shell (22) are vertically and parallelly fixed on the first lower pressing plate (24) in an upright way; the second lower pressure plate (23) is fixed at the bottom of the first lower pressure plate (24), and a lower diaphragm (7) is connected between the first lower pressure plate (24) and the second lower pressure plate (23).
4. The double link structure for a micro-pump according to claim 2 or 3, wherein: when the motor works, the center hole of the upper diaphragm (6) and the axis of the first connecting rod (1) form an intersection point, the intersection point is positioned on a vertical line vertical to the motor shaft (801), and the vertical line is a first axis (9); when the motor works, the center hole of the lower diaphragm (7) and the axis of the second connecting rod (2) form an intersection point, the intersection point is positioned on a vertical line vertical to the motor shaft (801), and the vertical line is a second axis (10); the two motion axis planes respectively determined by the first axis (9) and the second axis (10) are mutually coincident or close to each other; the motion axis plane is a plane which takes the axial direction of a motor shaft of the driving motor (8) as a normal vector and passes through the first axis (9) or the second axis (10).
5. The double link structure for a micro-pump according to claim 2 or 3, wherein: the second upper pressure plate (14) and the upper diaphragm (6) and the second lower pressure plate (23) and the lower diaphragm (7) are connected in any one of a vertical compression connection mode, a threaded connection mode and an integral forming mode.
6. The dual link structure for a micro-pump according to claim 1, wherein: the driving motor (8) drives the eccentric wheel (3) to rotate and is not contacted with the inner edges of the left through hole (20) and the right through hole (29).
7. The dual link structure for a micro-pump according to claim 1, wherein: the opposite surfaces of the left shell (21) and the right shell (22) are respectively provided with a plurality of groups of connecting rods and connecting holes which are matched with each other, and the connecting rods and the connecting holes are connected in an interference fit or bonding mode.
8. The dual link structure for a micro-pump according to claim 1, wherein: the outer contours of the left shell (21) and the right shell (22) are any one of diamond, square, circle and polygon.
9. The dual link structure for a micro-pump according to claim 1, wherein: the outer contour of the first connecting rod (1) is any one of splayed shape, circular shape, square shape and diamond shape.
10. The dual link structure for a micro-pump according to claim 1, wherein: the upper diaphragm (6) and the lower diaphragm (7) are both circular, planar, curved, planar square or curved square elastomers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121980293.6U CN215890391U (en) | 2021-08-23 | 2021-08-23 | Double-connecting-rod structure for micro pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121980293.6U CN215890391U (en) | 2021-08-23 | 2021-08-23 | Double-connecting-rod structure for micro pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890391U true CN215890391U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121980293.6U Active CN215890391U (en) | 2021-08-23 | 2021-08-23 | Double-connecting-rod structure for micro pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890391U (en) |
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2021
- 2021-08-23 CN CN202121980293.6U patent/CN215890391U/en active Active
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