CN217558477U - Three-cam reciprocating transmission mechanism and infusion pump - Google Patents
Three-cam reciprocating transmission mechanism and infusion pump Download PDFInfo
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- CN217558477U CN217558477U CN202221091785.4U CN202221091785U CN217558477U CN 217558477 U CN217558477 U CN 217558477U CN 202221091785 U CN202221091785 U CN 202221091785U CN 217558477 U CN217558477 U CN 217558477U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 42
- 238000001802 infusion Methods 0.000 title claims abstract description 28
- 239000007788 liquid Substances 0.000 claims description 44
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 5
- 230000003245 working effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The utility model discloses a three cam reciprocating transmission mechanism, including the pump box, be equipped with the output main shaft on the pump box, be equipped with three constant diameter cam along the axis rotation along with the output main shaft on the output main shaft, three cam is in proper order with 120 angle difference installation, and both sides are equipped with forward stroke pole and back return stroke pole respectively around every cam, install the driven bearing with the profile contact of cam through the roller shaft on forward stroke pole and the back return stroke pole respectively, the axis of front and back roller shaft is in same horizontal plane with the axis of the cam hole axis of cam and output main shaft, be equipped with between forward stroke pole and the back return stroke pole and connect the two and make the corresponding front and back from the driving rack of moving bearing contact cam's profile all the time, optimize the structure of pump when guaranteeing stable infusion and reduce its complexity, the dismouting of the transfer pump of being convenient for and improve its working property. The utility model also discloses an transfer pump based on three cam reciprocating transmission mechanism.
Description
[ technical field ] A
The utility model relates to a liquid transport technical field, wherein in particular to are a three cam reciprocating transmission mechanism and transfer pump.
[ background of the invention ]
In some existing infusion pumps, a reciprocating transmission mechanism of the infusion pump adopts a complex conjugate cam group to replace a traditional spring return structure, and a casing of an infusion pump placing transmission mechanism of the infusion pump can be detached conveniently for installing the transmission mechanism. These features complicate the cam-conjugate mechanism of the infusion pump, require installation of several cams and corresponding installation of sliding guide rails on the return seat of the cam link, and add several sealing rings to the casing of the infusion pump to prevent the lubricant from leaking, so as to form the reciprocating transmission mechanism. Such a component arrangement not only increases the complexity of machining and assembly, but also limits the operational performance of the infusion pump to the operational quality of these additional components.
The present invention has been made in view of this object.
[ Utility model ] A method for manufacturing a semiconductor device
The utility model aims to solve the technical problem that a simple structure and three cam reciprocating transmission mechanism that the infusion precision is high are provided, optimize the structure of infusion pump when guaranteeing stable infusion and reduce its complexity, the dismouting of the transfer pump of being convenient for and improve its working property.
In order to solve the technical problem, the utility model relates to a three cam reciprocating transmission mechanism, the pump box comprises a pump box body, be equipped with the output main shaft on the pump box body, be equipped with three constant diameter cam along the axis and rotate and pivoted along with the output main shaft on the output main shaft, it is three the cam is in proper order with 120 angle difference installation, every both sides are equipped with forward stroke pole and back return stroke pole respectively around the cam the axis of roller shaft and the cam hole axis of cam and the axis of output main shaft are in same horizontal plane, be equipped with between forward stroke pole and the back return stroke pole and connect the two and make the corresponding front and back follow the gear frame of the profile face of moving bearing contact cam all the time.
The three-cam reciprocating transmission mechanism comprises an L-shaped connecting rod and a return rod support, wherein one end of the connecting rod is fixed on the forward pushing rod, one end of the return rod support is fixed on the backward return rod, the other end of the return rod support is sleeved on the other end of the connecting rod through an insertion hole, a nut is connected with the connecting rod through a threaded section thread, and a compression spring is arranged between the nut and the return rod support to tightly press the backward return rod on the connecting rod.
According to the three-cam reciprocating transmission mechanism, the pump box body is provided with the fixing rod positioned below the connecting rod, and the connecting rod is arranged on the fixing rod through the linear bearing.
In the three-cam reciprocating transmission mechanism, the front and the back of the pump box body are respectively provided with three holes with coplanar axes, each hole is provided with a linear bearing, and the front pushing rod and the back returning rod are respectively arranged in the linear bearings corresponding to the front and the back to perform linear motion.
The utility model aims to solve another technical problem that an infusion pump that simple structure and infusion precision are high is provided.
In order to solve the technical problem, the utility model relates to an infusion pump based on three cam reciprocal drive mechanism, including three cam reciprocal drive mechanism, pump head fluid end, pump front bezel, pump right side board and pump left side board, wherein pump front bezel, pump right side board and pump left side board, pump box body are with locating pin and screw fixed mounting, and pump head fluid end is fixed on the pump front bezel.
According to the infusion pump, the hydraulic end of the pump head is provided with an upper liquid discharge channel, a lower liquid inlet channel and a liquid suction channel, the front end of the forward stroke rod is connected with a plunger rod, one end of the plunger rod is inserted into the liquid suction channel, a sealing ring is arranged in the liquid suction channel of the plunger rod for matching, and corresponding one-way valves or check valves are arranged in the upper liquid discharge channel and the lower liquid inlet channel; when the plunger rod moves backwards through the three-cam reciprocating transmission mechanism, liquid enters the liquid suction channel through the lower liquid inlet channel; when the plunger rod is pushed forwards through the three-cam reciprocating transmission mechanism, liquid is discharged from the liquid suction channel to the upper liquid discharge channel.
Compared with the prior art, the utility model discloses there is following advantage:
1. the utility model discloses a cam of constant diameter form, the value of the opposite two-way footpath sum on the cam profile is invariable always, when rotating through the output main shaft, the profile face of cam always can contact with the profile face of front and back driven bearing in transmission assembly, and the centre-to-centre spacing of front and back driven bearing keeps unchangeable to this guarantees to push away the journey pole and can carry out accurate reciprocating motion, ensures the infusion precision of transfer pump.
2. The transmission frame comprises an L-shaped connecting rod, a return rod support, a compression spring and a nut, wherein one end of the connecting rod is fixed on the forward pushing rod, one end of the return rod support is fixed on the backward return rod, and the other end of the return rod support is elastically pressed on the other end of the connecting rod through the nut and the compression spring, so that the front driven bearing and the rear driven bearing are elastically contacted on the profile surface of the cam, and the influence of the precision error of the processing and installation of a transmission part is avoided.
2. Compared with the prior double-cam set conjugate fit, the constant-diameter cam assembly only needs to adopt the single cam to be matched and installed with the front driven bearing and the rear driven bearing, thus simplifying the transmission structure of the infusion pump, facilitating the disassembly and the assembly of the reciprocating transmission mechanism and reducing the processing cost; and because the parts required by assembly are reduced, the assembling complexity is reduced, the operation reliability of the transmission mechanism can be improved, and the subsequent maintenance is convenient.
[ description of the drawings ]
The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of an infusion pump using a three-cam reciprocating transmission mechanism of the present invention;
FIG. 2 is one set of drive assemblies in a three cam reciprocating drive mechanism;
FIG. 3 is a schematic view of the cam and output spindle mounting of the three cam reciprocating drive;
FIG. 4 is a housing of an infusion pump employing the three cam reciprocating drive mechanism;
FIG. 5 is a schematic view of the hydraulic end of the pump head and the plunger rod disposed at the front end of the infusion pump housing;
FIG. 6 isbase:Sub>A cross-sectional view A-A of the fluid end of the pump head.
[ detailed description ] embodiments
The invention will be further described with reference to the accompanying drawings:
as shown in fig. 1 to 4, the three-cam reciprocating transmission mechanism includes a pump housing 4, an output main shaft 6 is provided on the pump housing 4, three equal-diameter cams 14 rotating along with the rotation of the output main shaft 6 are provided on the output main shaft 6 along an axial line, the three cams 14 are sequentially installed at an angle difference of 120 °, a forward stroke rod 10 and a backward stroke rod 11 are respectively provided on front and back sides of each cam 14, driven bearings 15 contacting profile surfaces of the cams 14 are respectively installed on the forward stroke rod 10 and the backward stroke rod 11 through roller shafts 30, axial lines of the front and back roller shafts 30 and cam hole axial lines of the cams 14 and axial lines of the output main shaft 6 are in the same horizontal plane, and a transmission frame connecting the forward stroke rod 10 and the backward stroke rod 11 and enabling the corresponding front and back driven bearings 15 to always contact profile surfaces of the cams 14 is provided between the forward stroke rod 10 and the backward stroke rod 11.
In the three-cam reciprocating transmission mechanism, because of the equal-diameter form, the driven bearings 15 are arranged at two sides of the cam 14, the center distance of the front driven bearing 15 and the rear driven bearing 15 can be kept unchanged in the rotation process of the output main shaft 6, so that a transmission part consisting of a group of cams 14, the driven bearings 15, the front push stroke rod 10, the rear return stroke rod 11 and a transmission frame can carry out accurate reciprocating motion, and the infusion precision of an infusion pump is ensured; meanwhile, only one cam is needed to be arranged in one group of transmission components, and the two cams of the conventional conjugate cam group are matched, so that the structure of the reciprocating transmission mechanism is simplified, the processing and the assembly are convenient, and the production and maintenance cost is reduced. In addition, the size of the shape of the radial cam 14 can be changed by modifying the parameters of the formula, so that the pushing stroke of the plunger rod 20 can be changed.
Three cams arranged on the output main shaft are distributed and arranged in sequence at an angle difference of 120 degrees, so that the three pushing rods can reciprocate in a staggered manner to achieve the aim of constantly conveying liquid.
As shown in fig. 2, the transmission frame comprises an L-shaped connecting rod 12 and a return rod support 13, one end of the connecting rod 12 is fixed on the forward push rod 10, one end of the return rod support 13 is fixed on the backward return rod 11, the other end of the return rod support 13 is sleeved on the other end of the connecting rod 12 through an insertion hole, a threaded nut is connected on the connecting rod 12 through a threaded section, and a compression spring is arranged between the nut and the return rod support 13 to press the backward return rod 11 on the connecting rod 12, so that the forward and backward driven bearings 15 are elastically contacted on the profile surface of the cam 14, and the influence of precision errors of processing and installation of a transmission part is avoided.
The pump box body 4 is provided with a fixing rod 5 positioned below the connecting rod 12, and the connecting rod 12 is arranged on the fixing rod 5 through a linear bearing, so that the structure is simple.
The front and the back of the pump box body 4 are respectively provided with three holes with coplanar axes, each hole is provided with a linear bearing, the front push stroke rod 10 and the back return stroke rod 11 are respectively arranged in the linear bearings corresponding to the front and the back to obtain support and guide for linear motion, the operation precision is improved, and the back end of the pump box body 4 is provided with a pump back plate 7 to cover the linear bearing at the back end. Through carrying out the setting of rear end hole position to pump box 4, and then place linear bearing, replaced the structure that traditional cam reciprocating transmission utilized return stroke seat to support, avoid adding corresponding slide rail and slider in addition, reduced the work load of assembly and be convenient for subsequent maintenance and maintenance.
The infusion pump shown in fig. 1 to 6 comprises the three-cam reciprocating transmission mechanism, a pump head hydraulic end 100, a pump front plate 1, a pump right plate 2 and a pump left plate 3, wherein the pump front plate 1, the pump right plate 2, the pump left plate 3 and a pump box 4 are fixedly installed by positioning pins and screws, and the pump head hydraulic end 100 is fixed on the pump front plate 1.
The pump head hydraulic end 100 is provided with an upper liquid discharge channel 110, a lower liquid inlet channel 120 and a liquid suction channel 130, the front end of the forward stroke rod 10 is connected with a plunger rod 20 with one end inserted into the liquid suction channel 130, the plunger rod 20 is provided with a sealing ring in the liquid suction channel 130 for matching, and the upper liquid discharge channel 110 and the lower liquid inlet channel 120 are both provided with corresponding one-way valves or check valves; when the plunger rod 20 moves backwards through the three-cam reciprocating transmission mechanism, liquid enters the liquid suction channel 130 through the lower liquid inlet channel 120; when plunger rod 20 is advanced by the three cam reciprocating drive mechanism, liquid is discharged from liquid intake channel 130 to upper liquid discharge channel 110, thus completing the liquid delivery process.
In the embodiment of the present invention, the working principle is as follows: roller bearings are arranged at left and right hole positions of the pump box body 4 and used for placing the output main shaft 6, the shaft tail end of the output main shaft 6 is connected with a motor shaft through a coupler, the cam 14 rotates along with the rotation of the output main shaft 6, then the front driven bearing 15 and the rear driven bearing 15 are driven, and the front pushing rod 10 and the plunger rod 20 are driven to reciprocate under the connection constraint of a transmission frame consisting of the connecting rod 12 and the rear return rod support 13, so that the liquid suction and discharge processes of the infusion pump are carried out.
The above-mentioned embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the main idea of the present invention.
Claims (6)
1. The utility model provides a three cam reciprocating transmission mechanism, includes pump box (4), be equipped with output main shaft (6) on pump box (4), its characterized in that: the output main shaft (6) is provided with three equal-diameter cams (14) rotating along with the rotation of the output main shaft (6) along the axis, the three cams (14) are sequentially installed at an angle difference of 120 degrees, the front side and the rear side of each cam (14) are respectively provided with a front pushing stroke rod (10) and a rear return stroke rod (11), driven bearings (15) in contact with the profile surface of each cam (14) are respectively installed on the front pushing stroke rod (10) and the rear return stroke rod (11) through roller shafts (30), the axis of the front roller shaft (30) and the axis of a cam hole of each cam (14) and the axis of the output main shaft (6) are in the same horizontal plane, and a transmission frame which is used for connecting the front pushing stroke rod (10) and the rear return stroke rod (11) and enables the corresponding front and rear driven bearings (15) to be in contact with the profile surface of each cam (14) all the time is arranged between the front pushing stroke rod (10) and the rear return stroke rod (11).
2. A three cam reciprocating drive mechanism as defined in claim 1, wherein: the transmission frame comprises an L-shaped connecting rod (12) and a return rod support (13), one end of the connecting rod (12) is fixed on a forward pushing rod (10), one end of the return rod support (13) is fixed on a backward return rod (11), the other end of the return rod support is sleeved on the other end of the connecting rod (12) through a jack, a threaded section connecting nut is arranged on the connecting rod (12), and a compression spring is arranged between the nut and the return rod support (13) to compress the backward return rod (11) on the connecting rod (12).
3. A three cam reciprocating drive mechanism as defined in claim 2, wherein: the pump box body (4) is provided with a fixed rod (5) positioned below the connecting rod (12), and the connecting rod (12) is arranged on the fixed rod (5) through a linear bearing.
4. A three cam reciprocating drive mechanism as claimed in any one of claims 1 to 3, wherein: the front and the back of the pump box body (4) are respectively provided with three holes with coplanar axes, each hole is provided with a linear bearing, and the forward pushing rod (10) and the backward returning rod (11) are respectively arranged in the linear bearings corresponding to the front and the back to perform linear motion.
5. An infusion pump based on the three-cam reciprocating transmission mechanism of any one of claims 1 to 4, characterized in that: the three-cam reciprocating pump comprises a three-cam reciprocating transmission mechanism, a pump head hydraulic end (100), a pump front plate (1), a pump right plate (2) and a pump left plate (3), wherein the pump front plate (1), the pump right plate (2), the pump left plate (3) and a pump box body (4) are fixedly installed through positioning pins and screws, and the pump head hydraulic end (100) is fixed on the pump front plate (1).
6. The infusion pump of claim 5, wherein: the liquid pump is characterized in that the hydraulic end (100) of the pump head is provided with an upper liquid discharge channel (110), a lower liquid inlet channel (120) and a liquid suction channel (130), the front end of the forward pushing stroke rod (10) is connected with a plunger rod (20) with one end inserted into the liquid suction channel (130), the plunger rod (20) is provided with a sealing ring in the liquid suction channel (130) for matching, and corresponding one-way valves or check valves are arranged in the upper liquid discharge channel (110) and the lower liquid inlet channel (120); when the plunger rod (20) moves backwards through the three-cam reciprocating transmission mechanism, liquid enters the liquid suction channel (130) through the lower liquid inlet channel (120); when the plunger rod (20) is advanced by the three cam reciprocating drive mechanism, liquid is discharged from the liquid suction passage (130) to the upper liquid discharge passage (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221091785.4U CN217558477U (en) | 2022-05-09 | 2022-05-09 | Three-cam reciprocating transmission mechanism and infusion pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221091785.4U CN217558477U (en) | 2022-05-09 | 2022-05-09 | Three-cam reciprocating transmission mechanism and infusion pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217558477U true CN217558477U (en) | 2022-10-11 |
Family
ID=83474749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221091785.4U Active CN217558477U (en) | 2022-05-09 | 2022-05-09 | Three-cam reciprocating transmission mechanism and infusion pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217558477U (en) |
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2022
- 2022-05-09 CN CN202221091785.4U patent/CN217558477U/en active Active
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