CN117469122B - A double-head injection pump - Google Patents
A double-head injection pumpInfo
- Publication number
- CN117469122B CN117469122B CN202210861805.XA CN202210861805A CN117469122B CN 117469122 B CN117469122 B CN 117469122B CN 202210861805 A CN202210861805 A CN 202210861805A CN 117469122 B CN117469122 B CN 117469122B
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- CN
- China
- Prior art keywords
- assembly
- double
- coupling
- head
- connecting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/141—Details or component parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/28—Control of machines or pumps with stationary cylinders
- F04B1/29—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides a double-head liquid injection pump which comprises a double-head motor, a coupler assembly connected with an output shaft of the double-head motor, and a pump head assembly connected with the coupler assembly, wherein the pump head assembly is a piston pump, the output shaft of the double-head motor is connected with the coupler assembly through a key slot fit clearance, the coupler assembly is connected with the pump head assembly through a universal ball head connecting rod, the output shaft of the double-head motor and the axis of the coupler assembly are distributed in a co-linear manner, a certain included angle is formed between the axis of the pump head assembly and the axis of the coupler assembly, the double-head motor drives the coupler assembly to do rotary motion, and the coupler assembly drives a piston of the piston pump to do reciprocating motion through the universal ball head connecting rod. The double-head liquid injection pump has the advantages of compact structure, safety, reliability and capability of improving the liquid injection precision. When the double-head liquid injection pump is suitable for electrolyte injection in the lithium battery industry, the injection accuracy and the injection efficiency of the electrolyte can be improved, and meanwhile, the liquid injection amount can be adjusted, and the service life of a driving motor can be prolonged.
Description
Technical Field
The invention relates to the technical field of mechanical automation, in particular to a double-head liquid injection pump used in the related liquid filling industries such as battery liquid injection, liquid medicine liquid injection, oral liquid filling and the like.
Background
With the continuous development of society and continuous progress of technology, the application of mechanical automatic production is becoming wider and wider. In the field of battery production, pharmaceutical production, biological reagents and perfusion equipment in various industries such as chemical industry, a double-head liquid injection pump is used.
The double-head liquid injection pump generally comprises three main parts, namely a driving motor end, a transmission connection assembly and a hydraulic end. Typical double-headed liquid pumps include vane pumps, piston pumps, diaphragm pumps, gear pumps, and screw pumps. In the process of filling batteries or pharmaceuticals with high precision, a double-ended liquid filling pump of the piston pump type is generally adopted for filling.
Existing piston-type double-ended infusion pumps generally have the following disadvantages:
1. the piston of fluid end can give driving motor an axial reaction force through transmission coupling assembling in the reciprocating motion process, detracts driving motor's life.
2. The piston of fluid end can cause driving motor to beat owing to there is axial reaction force for driving motor, and driving motor's beat can cause the piston stroke of fluid end to walk the position inaccurately in turn, and then causes the fluid end to annotate the liquid and produce the error, causes annotating the liquid inaccurately.
3. In the process of injecting liquid, the stroke of the piston needs to be adjusted according to the liquid injection amounts of different specifications, and the existing adjusting mode has the problems of inconvenient adjustment or insufficient adjusting precision.
If a double-end liquid injection pump with the hydraulic load end capable of not giving axial reaction force to the driving motor and ensuring the axial stroke of the piston of the double-end liquid injection pump hydraulic end to be accurate and not being caused by the problems of jump of the driving motor and the like can be developed, the double-end liquid injection pump has great market value.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the double-head liquid injection pump which is compact in structure, safe and reliable and can improve the liquid injection precision and the liquid injection efficiency. When the double-head liquid injection pump is suitable for electrolyte injection in the lithium battery industry, the electrolyte injection accuracy can be improved, and the service life of the driving motor can be prolonged.
The double-head liquid injection pump comprises a double-head motor, a coupler assembly connected with an output shaft of the double-head motor and a pump head assembly connected with the coupler assembly, wherein the output shaft of the double-head motor is symmetrically distributed, the pump head assembly is a piston pump, the output shaft of the double-head motor is connected with the coupler assembly through a key slot fit clearance, the coupler assembly is connected with the pump head assembly through a universal ball-head connecting rod, the output shaft of the double-head motor and the axis of the coupler assembly are distributed in a co-linear way, a certain included angle is formed between the axis of the pump head assembly and the axis of the coupler assembly, the double-head motor drives the coupler assembly to do rotary motion, and the coupler assembly drives a piston of the piston pump to do reciprocating motion through the universal ball-head connecting rod.
The coupler assembly comprises a T-shaped integral stepped shaft, a coupler bearing sleeved on the stepped shaft (the coupler bearing can adopt various conventional bearings such as deep groove ball bearings) and a coupler fixing seat, one larger end of the stepped shaft is connected with a piston of the piston pump through a universal ball head connecting rod, one smaller end of the stepped shaft is connected with an output shaft of the double-headed motor through a key slot fit clearance, the coupler bearing is sleeved on one smaller end of the stepped shaft, the coupler fixing seat is sleeved on the coupler bearing, and an outer ring of the coupler bearing is tightly fixed by the coupler fixing seat.
The shaft coupling assembly further comprises an annular first locking piece and an annular second locking piece, wherein the first locking piece is fixedly connected with the shaft coupling fixing seat and abuts against the outer ring of the shaft coupling bearing to limit the outer ring of the shaft coupling bearing to move in the axial direction, and the second locking piece is fixedly connected with the stepped shaft and abuts against the inner ring of the shaft coupling bearing to limit the inner ring of the shaft coupling bearing to move in the axial direction.
According to the technical scheme, the annular first locking piece is provided with external threads, the annular second locking piece is provided with internal threads, the stepped shaft is provided with an external flange protruding outwards, one smaller end of the stepped shaft is further provided with external threads matched with the internal threads of the second locking piece, one end of the coupler fixing seat is provided with an internal flange protruding inwards, the other end of the coupler fixing seat is provided with internal threads matched with the external threads of the first locking piece, one end of an inner ring of the coupler bearing is abutted against the external flange of the stepped shaft, the other end of the inner ring of the coupler bearing is abutted against the second locking piece, one end of an outer ring of the coupler bearing is abutted against the internal flange of the coupler fixing seat, and the other end of the outer ring of the coupler bearing is abutted against the first locking piece.
According to the preferred technical scheme, the coupler fixing seat is further provided with a threaded hole, the fastening screw is in threaded fit with the threaded hole, and the fastening screw abuts against the first locking piece to limit the first locking piece to move relative to the coupler fixing seat.
The universal ball head connecting rod comprises a universal ball and a connecting rod which can be inserted into the universal ball to move, the universal ball of the universal ball head connecting rod can be embedded into a piston of a piston pump in a steering way, one end of the connecting rod of the universal ball head connecting rod is fixed on a coupler assembly, the other end of the connecting rod is inserted into the universal ball in the piston, and the double-head motor drives the coupler assembly to rotate in a rotating way so as to drive the connecting rod of the universal ball head connecting rod to move in the universal ball and drive the piston of the piston pump to reciprocate.
The universal ball head connecting rod comprises a universal ball and a connecting rod which can be inserted into the universal ball to move, the universal ball of the universal ball head connecting rod can be steered and embedded into a stepped shaft of a coupler assembly, one end of the connecting rod of the universal ball head connecting rod is fixed on a piston of a piston pump, the other end of the connecting rod is inserted into the universal ball positioned in the stepped shaft, and the double-head motor drives the stepped shaft of the coupler assembly to rotate to drive the connecting rod to move in the universal ball and drive the piston of the piston pump to reciprocate.
The double-head liquid injection pump further comprises a base, a rotary plate assembly and an angle adjusting assembly, wherein the rotary plate assembly is used for rotatably installing the pump head assembly on the base, the angle adjusting assembly is connected with the rotary plate assembly, and the installation angle of the pump head assembly is adjusted by driving the rotary plate assembly to rotate.
The optimal technical scheme is that the rotating plate assembly comprises a rotating plate and a rotating shaft, the angle adjusting assembly comprises a differential bolt and a sliding fork shaft, the pump head assembly is fixedly arranged on the rotating plate, the rotating shaft rotatably mounts the rotating plate on a base, the differential bolt is provided with a smaller threaded section and a larger threaded section, one end of the sliding fork shaft is connected with the rotating plate, the other end of the sliding fork shaft is in threaded connection with the smaller threaded section of the differential bolt, and the larger threaded section of the differential bolt is in threaded connection with the base. The shape of the slip yoke shaft can be various, one of the slip yoke shafts can be a single lug plate at one end, and the other end is provided with threads. The connection mode of rotor plate and fork axle also can be various, and one of them is, rotor plate and fork axle link end is the binaural plate structure, inserts the monaural board end of fork axle in the monaural board of rotor plate, links together the monaural board of rotor plate and fork axle through the round pin axle.
According to the technical scheme, a rotating plate is arranged on a base, the rotating plate is rotatably arranged on the base through a pin shaft and is provided with an internal thread through hole, the internal thread through hole of the rotating plate is matched with threads of a larger thread section of the differential bolt, and springs are sleeved on the sliding fork shaft and the differential bolt. The spring can prevent the differential bolts from slipping and loosening. The rotating plate is used for transitional direct connection between the differential bolts and the base, so that the differential bolts are free from blocking phenomenon in the angle adjusting process, and the angle of adjustment is greatly increased. Namely, the rotating plate can rotate at a certain angle when the differential bolts are fed, so that the differential bolts can be self-adaptive and possible jamming phenomenon is caused by the angle change of the rotating plate.
The sliding fork shaft and the differential bolt are in threaded connection in such a way that the sliding fork shaft is provided with external threads, the smaller thread section of the differential bolt is provided with internal threads, and the specific implementation way is that an axial blind hole is formed at one end of the differential bolt connected with the sliding fork shaft, and then the internal threads matched with the external threads on the sliding fork shaft are tapped in the blind hole. Of course, the sliding fork shaft can also be provided with internal threads, and the smaller thread section of the differential bolt is provided with external threads. The specific implementation mode is that one end of the sliding fork shaft connected with the differential bolt is provided with an axial blind hole, and internal threads are tapped in the blind hole of the sliding fork shaft, so that the internal threads of the sliding fork shaft are matched with the threads of the smaller section of the differential bolt.
Compared with the prior art, the invention has the beneficial effects that:
1. The double-end motor of the double-end liquid injection pump is connected with the coupler component through a key slot and is in clearance fit. Therefore, no axial force transmission exists between the double-headed motor and the coupler assembly, and only radial rotational force transmission exists. Meanwhile, a certain included angle is formed between the coupling assembly and the pump head assembly through the axial center distribution, and the coupling assembly is connected with the pump head assembly through a universal connecting rod. Because a certain included angle exists between the axes, and the universal connecting rod is adopted for connection, the rotary motion transmitted by the double-headed motor received by the coupler assembly can be converted into the reciprocating motion of the piston pump piston of the pump head assembly. The whole mechanism is reliable in operation and free from axial force transmission, so that the service life of the double-headed motor is prolonged.
2. The coupling component of the double-end liquid injection pump adopts the mutual matching of the stepped shaft, the coupling bearing, the coupling fixing seat, the first locking piece and the second locking piece which are integrally T-shaped, so that the coupling blocks the axial reaction force of the load end of the pump head component, and the axial movement of the inner ring and the outer ring of the coupling bearing is respectively and independently limited, thereby blocking the axial force transmitted by the load end of the coupling component, preventing the axial force from being transmitted to the double-end motor, and being beneficial to prolonging the service life of the double-end motor. Meanwhile, the outer flange on the stepped shaft and the second locking piece limit the axial movement of the inner ring of the coupler bearing, and the inner flange of the coupler fixing seat and the first locking piece limit the axial movement of the outer ring of the coupler bearing, and meanwhile, the force on the outer ring of the coupler is transmitted to the coupler fixing seat through the set screw, so that the axial force is not transmitted to the end of the driving double-head motor. And the axial movement of the inner ring and the outer ring of the coupler bearing is independently limited through the independent structures, so that the output power of the coupler assembly is stable and reliable, and especially the axial output of the coupler assembly is safe and reliable, so that the piston of the pump head assembly can accurately and reliably reciprocate, and the liquid injection of the double-head liquid injection pump is more accurate.
3. The pump head component of the double-head liquid injection pump is rotatably fixed on the base and is matched with the angle adjusting component, so that the distribution angle between the pump head component and the axis of the coupler component can be adjusted. And then the stroke of the piston pump of the pump head assembly can be changed and the reciprocating operation can be regulated, thereby realizing the purpose that the liquid injection amount of the double-head liquid injection pump can be regulated.
4. The angle adjusting component adopts a structure that the differential bolts are matched with the sliding fork shafts, so that the rotating angle of the rotating component can be accurately adjusted.
5. The double-head motor is adopted, the double-head motor is provided with two output shafts and two pump head assemblies, and under the same conditions, compared with a single-head motor and a single-head liquid injection pump, the double-head liquid injection pump provided by the invention has higher liquid injection efficiency.
Drawings
Fig. 1 is a schematic perspective view of a dual head infusion pump of the present invention.
Fig. 2 is a schematic diagram of the front view of the dual head infusion pump of the present invention.
Fig. 3 is a schematic top view of the dual head infusion pump of the present invention.
Fig. 4 is a right-side view of the dual-head infusion pump of the present invention.
Fig. 5 is a schematic perspective view of a coupling assembly.
Fig. 6 is a schematic elevational view of the coupling assembly.
Fig. 7 is a schematic cross-sectional view of a coupling assembly.
Fig. 8 is a schematic top view of a coupling assembly.
Fig. 9 is a schematic perspective view of a stepped shaft.
Fig. 10 is a schematic front view of the stepped shaft.
Fig. 11 is a right-view structural schematic diagram of the stepped shaft.
Fig. 12 is a schematic top view of the stepped shaft.
Fig. 13 is a schematic front view of the coupling holder.
Fig. 14 is a right-side view of the coupler holder.
Fig. 15 is a schematic cross-sectional view of the structure of fig. 14 in the direction A-A.
Fig. 16 is a perspective view of a connection structure among the base, the rotating plate assembly, and the angle adjusting assembly.
Fig. 17 is a front schematic view of a connection structure between the base, the rotating plate assembly, and the angle adjusting assembly.
Fig. 18 is a schematic left view of a connection structure between the base, the rotating plate assembly, and the angle adjusting assembly.
Fig. 19 is a right side view schematically showing a connection structure between the base, the rotating plate assembly, and the angle adjusting assembly.
Fig. 20 is a perspective view of a connection structure between the rotating plate assembly and the fork shaft.
Fig. 21 is a perspective view showing a connection structure among the rotary plate, the slide fork shaft, and the differential bolts.
Fig. 22 is a schematic structural view of the differential bolt.
Fig. 23 is a schematic structural view of the slip yoke.
Fig. 24 is a schematic view of a connection structure between the differential bolt and the fork shaft.
Fig. 25 is a schematic perspective view of a universal ball joint link.
Marked in the figure as:
1-double-ended motor, 2-coupler assembly, 21-stepped shaft, 211-outer flange, 22-coupler bearing, 23-coupler holder, 231-inner flange, 232-threaded bore, 24-first locking member, 25-second locking member, 26-set screw, 3-pump head assembly, 4-universal ball head link, 41-universal ball, 42-connecting rod, 5-base, 51-rotating plate, 6-rotating plate assembly, 61-rotating plate, 611-double-lug plate, 62-rotating shaft, 7-angle adjustment assembly, 71-differential bolt, 711-smaller threaded section, 712-larger threaded section, 713-spring, 72-slip yoke shaft, 721-single lug plate.
Detailed Description
An embodiment of a dual head infusion pump in accordance with the present invention will be further described with reference to fig. 1-25.
The double-head liquid injection pump comprises a double-head motor 1, a coupler assembly 2 connected with an output shaft of the double-head motor 1, and a pump head assembly 3 connected with the coupler assembly 2, wherein the output shaft of the double-head motor 1 is symmetrically distributed, the pump head assembly 3 is also symmetrically distributed, the pump head assembly 3 is a piston pump, the output shaft of the double-head motor 1 is connected with the coupler assembly 2 through a key slot fit clearance, the coupler assembly 2 is connected with the pump head assembly 3 through a universal ball connecting rod 4, the output shaft of the double-head motor 1 and the axis of the coupler assembly 2 are in co-linear distribution, the axis of the pump head assembly 3 and the axis of the coupler assembly 2 form a certain included angle distribution, the double-head motor 1 drives the coupler assembly 2 to do rotary motion, and the coupler assembly 2 drives a piston of the piston pump 3 to do reciprocating motion through the universal ball connecting rod 4.
The coupler assembly 2 comprises a stepped shaft 21 which is integrally T-shaped, a coupler bearing 22 sleeved on the stepped shaft 21 (the coupler bearing can adopt various conventional bearings such as deep groove ball bearings) and a coupler fixing seat 23, wherein the larger end of the stepped shaft is connected with a piston of the piston pump 3 through a universal ball head connecting rod 4;
The ball joint link 4 includes a ball 41 and a link rod 42 which is inserted into the ball 41 and moves. In this embodiment, the universal ball 41 of the universal ball-head connecting rod 4 is rotatably embedded in the piston of the piston pump 3, one end of the connecting rod 42 of the universal ball-head connecting rod 4 is fixed on the stepped shaft 21 of the coupler assembly 2, the other end of the connecting rod 42 is inserted into the universal ball 41 positioned in the piston, the connecting rod 42 can slide in the universal ball 41, the double-head motor 1 rotates to drive the coupler assembly 2 to rotate, the connecting rod 42 of the universal ball-head connecting rod 4 is driven to move in the universal ball 41, and the piston of the piston pump 3 is driven to reciprocate. Of course, in other embodiments, the universal ball 41 of the universal ball-head connecting rod 4 may be embedded in the stepped shaft 21 of the coupling assembly 2, one end of the connecting rod 42 of the universal ball-head connecting rod 4 is fixed on the piston of the piston pump 3, the other end of the connecting rod 42 is inserted into the universal ball 41 located in the stepped shaft 21, and the double-head motor 1 drives the stepped shaft 21 of the coupling assembly 2 to rotate, drives the connecting rod 42 to slide in the universal ball 41, and drives the piston of the piston pump 3 to reciprocate.
The smaller end of the stepped shaft 21 is connected with the output shaft of the double-headed motor 1 through a key slot fit clearance, the coupler bearing 22 is sleeved on the smaller end of the stepped shaft 21, the coupler fixing seat 23 is sleeved on the coupler bearing 22, and the coupler fixing seat 23 tightly presses and fixes the outer ring of the coupler bearing 22.
The coupling assembly 2 further comprises an annular first locking member 24 and an annular second locking member 25, wherein the first locking member 24 is fixedly connected with the coupling fixing seat 23 and abuts against the outer ring of the coupling bearing 22 to limit the outer ring of the coupling bearing 22 to move in the axial direction, and the second locking member 25 is fixedly connected with the stepped shaft 21 and abuts against the inner ring of the coupling bearing 22 to limit the inner ring of the coupling bearing 22 to move in the axial direction.
The annular first locking member 24 is provided with external threads, the annular second locking member 25 is provided with internal threads, the stepped shaft 21 is provided with an external flange 211 protruding outwards, the smaller end of the stepped shaft 21 is also provided with external threads matched with the internal threads of the second locking member 25, one end of the coupler fixing seat 23 is provided with an internal flange 231 protruding inwards, the other end of the coupler fixing seat 23 is provided with internal threads matched with the external threads of the first locking member 24, one end of an inner ring of the coupler bearing 22 is abutted against the external flange 211 of the stepped shaft 21, the other end of the inner ring of the coupler bearing 22 is abutted against the second locking member 25, one end of an outer ring of the coupler bearing 22 is abutted against the internal flange 231 of the coupler fixing seat 23, and the other end of the outer ring of the coupler bearing 22 is abutted against the first locking member 24. Preferably, the inner diameter of the first locking member 24 is larger than the outer diameter of the second locking member 25, and the second locking member 25 passes through the inner diameter of the first locking member 24 to abut against the inner ring of the coupling bearing 22.
The coupler fixing seat 23 is also provided with a threaded hole 232, the fastening screw 26 is in threaded fit with the threaded hole 232, and the fastening screw 26 abuts against the first locking member 24 to limit the first locking member 24 to move relative to the coupler fixing seat 23.
The double-head liquid injection pump further comprises a base 5, a rotary plate assembly 6 and an angle adjusting assembly 7, wherein the rotary plate assembly 6 rotatably mounts the pump head assembly 3 on the base 5, the angle adjusting assembly 7 is connected with the rotary plate assembly 6, and the mounting angle of the pump head assembly 3 is adjusted by driving the rotary plate assembly 6 to rotate.
The rotating plate assembly 6 comprises a rotating plate 61 and a rotating shaft 62, the angle adjusting assembly 7 comprises a differential bolt 71 and a sliding fork shaft 72, the pump head assembly 3 is fixedly arranged on the rotating plate 61, the rotating shaft 62 rotatably mounts the rotating plate 61 on the base 5, the differential bolt 71 is provided with a small threaded section 711 and a large threaded section 712, one end of the sliding fork shaft 72 is connected with the rotating plate 61, the other end of the sliding fork shaft 72 is in threaded connection with the small threaded section 711 of the differential bolt 71, and the large threaded section 712 of the differential bolt 71 is in threaded connection with the base 5. The shape of the slip yoke 72 may vary, and one of the slip yoke 72 may be shaped as a single lug 721 at one end and threaded at the other end. The connection between the rotary plate 61 and the fork shaft 72 may be varied, and one of them is that the connection end between the rotary plate 61 and the fork shaft 72 has a double-lug plate 611 structure, the single-lug plate 721 of the fork shaft 72 is inserted into the double-lug plate 611 of the rotary plate 61, and the double-lug plate 611 of the rotary plate 61 and the single-lug plate 721 of the fork shaft 72 are connected by a pin.
The base 5 is provided with a rotating plate 51, the rotating plate 51 is rotatably arranged on the base 5 through a pin shaft, the rotating plate 51 is provided with an internal thread through hole, the internal thread through hole of the rotating plate 51 is matched with the thread of the larger thread section 712 of the differential bolt 71, and the sliding fork shaft 72 and the differential bolt 71 are also sleeved with a spring 713. The spring 713 can prevent the differential bolt 71 from slipping loose. The rotation plate 51 is adopted to directly connect the differential bolt 71 and the base 5, so that the differential bolt 71 is free from blocking phenomenon in the process of adjusting the angle, and the adjusting angle of the differential bolt is greatly increased. That is, the rotating plate 51 may be rotated by a certain angle while the differential bolts 71 are fed, so that the differential bolts 71 may be self-adapted to a possible locking phenomenon due to the angular variation of the rotating plate.
The sliding fork shaft 72 and the differential bolt 71 may be screwed in such a way that the sliding fork shaft 72 is externally threaded, the smaller threaded section 711 of the differential bolt 71 is internally threaded, and in a specific implementation manner, an axial blind hole is formed at one end of the differential bolt 71 connected with the sliding fork shaft 72, and then an internal thread matched with the external thread on the sliding fork shaft 72 is tapped in the blind hole. Of course, the sliding fork shaft 72 may be internally threaded, and the smaller threaded section 711 of the differential bolt 71 may be externally threaded. The concrete implementation mode is that an axial blind hole is formed in one end, connected with the differential bolt 71, of the sliding fork shaft 72, internal threads are tapped in the blind hole of the sliding fork shaft 72, and the internal threads of the sliding fork shaft 72 are matched with smaller section threads 711 of the differential bolt 71.
The working principle of the double-head liquid injection pump of the invention is as follows:
The double-end motor of the double-end liquid injection pump is connected with the coupler component through a key slot and is in clearance fit. Therefore, no axial force transmission exists between the double-headed motor and the coupler assembly, and only radial rotational force transmission exists. Meanwhile, a certain included angle is formed between the coupling assembly and the pump head assembly through the axial center distribution, and the coupling assembly is connected with the pump head assembly through a universal connecting rod. Because a certain included angle exists between the axes, and the universal connecting rod is adopted for connection, the rotary motion transmitted by the double-headed motor received by the coupler assembly can be converted into the reciprocating motion of the piston pump piston of the pump head assembly. The coupler component of the double-end liquid injection pump adopts the mutual matching of the stepped shaft, the coupler bearing, the coupler fixing seat, the first locking piece and the second locking piece which are integrally T-shaped, so that the coupler blocks the axial reaction force of the load end of the pump head component, and the axial movement of the inner ring and the outer ring of the coupler bearing is respectively and independently limited, thereby blocking the axial force transmitted by the load end of the coupler component, preventing the axial force from being transmitted to the double-end motor, and being beneficial to prolonging the service life of the double-end motor. Meanwhile, the outer flange on the stepped shaft and the second locking piece limit the axial movement of the inner ring of the coupler bearing, and the inner flange of the coupler fixing seat and the first locking piece limit the axial movement of the outer ring of the coupler bearing, and meanwhile, the force on the outer ring of the coupler is transmitted to the coupler fixing seat through the set screw, so that the axial force is not transmitted to the end of the driving double-head motor. And the axial movement of the inner ring and the outer ring of the coupler bearing is independently limited through the independent structures, so that the output power of the coupler assembly is stable and reliable, and especially the axial output of the coupler assembly is safe and reliable, so that the piston of the pump head assembly can accurately and reliably reciprocate, and the liquid injection of the double-head liquid injection pump is more accurate. The pump head component of the double-head liquid injection pump is rotatably fixed on the base and is matched with the angle adjusting component, when different liquid injection amounts are needed, the stroke of the piston pump of the pump head component can be changed by only adjusting the distribution angle between the pump head component and the axle center of the coupling component, so that the purpose that the liquid injection amount of the double-head liquid injection pump can be adjusted is realized. The angle adjusting component adopts a structure that the differential bolts are matched with the sliding fork shafts, so that the rotating angle of the rotating component can be accurately adjusted.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210861805.XA CN117469122B (en) | 2022-07-20 | 2022-07-20 | A double-head injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210861805.XA CN117469122B (en) | 2022-07-20 | 2022-07-20 | A double-head injection pump |
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| CN201841538U (en) * | 2010-10-25 | 2011-05-25 | 惠州市华阳多媒体电子有限公司 | Universal small-size automatic rotation graduated work table |
| CN203272042U (en) * | 2013-05-08 | 2013-11-06 | 深圳市铂纳特斯自动化科技有限公司 | Double-end liquid charge pump |
| US11035348B2 (en) * | 2018-08-28 | 2021-06-15 | National Oilwell Varco, L.P. | Reciprocating pumps having a pivoting arm |
| KR102878487B1 (en) * | 2019-07-31 | 2025-10-29 | 플루드 미터링, 아이엔씨. | Device for electronic flow control in fixed displacement pumps |
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