CN220705850U - Precise numerical control liquid injection pump for reversing special motor - Google Patents
Precise numerical control liquid injection pump for reversing special motor Download PDFInfo
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- CN220705850U CN220705850U CN202321826660.6U CN202321826660U CN220705850U CN 220705850 U CN220705850 U CN 220705850U CN 202321826660 U CN202321826660 U CN 202321826660U CN 220705850 U CN220705850 U CN 220705850U
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- liquid injection
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- 239000007788 liquid Substances 0.000 title claims abstract description 62
- 238000002347 injection Methods 0.000 title claims abstract description 41
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- 230000006978 adaptation Effects 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
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- 230000007246 mechanism Effects 0.000 description 5
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- 230000008569 process Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Reciprocating Pumps (AREA)
Abstract
The utility model relates to the technical field of liquid injection pumps, in particular to a precise numerical control liquid injection pump with a special motor reversing function, which comprises a cylinder body, wherein a movable cavity is arranged in the cylinder body, and the cylinder body is provided with a liquid inlet and a liquid outlet which are respectively communicated with the movable cavity; the end part of the piston rod is fixedly connected with a piston body, the piston body is inserted into the movable cavity, and a notch communicated with the movable cavity is formed in the side of the end part of the piston body, facing the cylinder body; the spline type stepping motor comprises a motor body and a spline shaft penetrating through the motor body, the motor body can drive the spline shaft to rotate, and the end part of the spline shaft is connected with the piston rod through a first floating coupler; the driving assembly is used for driving the piston rod to slide back and forth along the axial direction of the cylinder body. The spline type stepping motor drives the piston rod to rotate and change direction, the structure is simple and compact, the design is novel and reasonable, the occupied space is small, the problem of complex structure in the past is solved, the manufacturing cost is reduced, and the space volume occupied by the injection pump is reduced.
Description
Technical Field
The utility model relates to the technical field of liquid injection pumps, in particular to a precise numerical control liquid injection pump with a special motor reversing function.
Background
The existing injection pump generally adopts the following four modes to reverse the liquid inlet and liquid outlet of the injection pump: firstly, a one-way valve is adopted, the flow direction of liquid in the mode is unidirectional, the liquid cannot flow reversely, and the problem of hanging drops at the liquid injection outlet cannot be solved; in addition, the one-way valve pushes the valve body against the spring force by the liquid thrust, so that the liquid injection precision is relatively low. Second, the plunger module adds a reversing lever, which increases the complexity of the mechanism, the failure rate of the infusion pump, and the probability of a stuck pump. Thirdly, the reversing mechanism is external (an air cylinder or a motor is externally arranged on one side of the plunger rod), the connecting rod mechanism and even the pneumatic device are additionally arranged in the mode, the structure is complex, the stability is relatively low, and the failure rate is increased. Fourth, an electromagnetic clutch is added at the plunger shaft. The mode has higher cost and more complex mechanism, and no matched clutch fittings exist in China. Therefore, the reversing mechanism of the conventional liquid injection pump has the problems of complex structure and high manufacturing cost.
Disclosure of Invention
The utility model aims to provide a precise numerical control liquid injection pump with special motor reversing for overcoming the defects in the prior art, and the problem of complex structure can be solved by adopting the liquid injection pump.
The aim of the utility model is achieved by the following technical scheme: the application provides a precise numerical control liquid injection pump with a special motor reversing function, which comprises a cylinder body, wherein a movable cavity is arranged in the cylinder body, and the cylinder body is provided with a liquid inlet and a liquid outlet which are respectively communicated with the movable cavity; the end part of the piston rod is fixedly connected with a piston body, the piston body is inserted into the movable cavity, and a notch communicated with the movable cavity is formed in the side of the end part of the piston body, facing the cylinder body; the spline type stepping motor comprises a motor body and a spline shaft penetrating through the motor body, the motor body can drive the spline shaft to rotate, and the end part of the spline shaft is connected with the piston rod through a first floating coupler; and the driving assembly is used for driving the piston rod, the first floating coupler and the spline shaft to slide back and forth along the axial direction of the cylinder body.
The driving assembly comprises a fixed shaft type screw rod stepping motor and a second floating coupler, an output shaft of the fixed shaft type screw rod stepping motor is fixedly connected with one end of the second floating coupler, and the other end of the second floating coupler is connected with the spline shaft through a bearing.
Wherein, the outer periphery side of the fixed shaft type screw rod stepping motor is sleeved with a motor cover.
The motor cover extends towards the cylinder body and is fixedly connected with the cylinder body, so that the motor cover is sleeved outside the second floating coupler, the spline type stepping motor and the first floating coupler.
Wherein, the up end rigid coupling of motor cover has electrical apparatus adaptation module, and electrical apparatus adaptation module is connected with spline formula step motor electricity.
The spline type stepping motor further comprises a spline sleeve, the spline sleeve is fixedly connected with the working end of the motor body, and an induction piece is fixedly arranged on the end face of the spline sleeve.
And the angle sensor used for monitoring the induction piece is fixedly arranged in the motor cover and is electrically connected with the electric appliance adaptation module.
Wherein, the bottom end surface of the motor cover is fixedly connected with a plurality of machine feet which are uniformly distributed at intervals.
The cylinder body comprises a bottom cover, a middle shell and an end cover, wherein the bottom cover is fixedly connected with the bottom of the middle shell, the top end of the middle shell is fixedly connected with the end cover, a piston sleeve positioned inside the middle shell is clamped between the end cover and the bottom cover, and the piston body is inserted into the piston sleeve.
The piston body and the piston sleeve are both of ceramic structures, and the piston rod is of a stainless steel structure.
The precise numerical control liquid injection pump for reversing the special motor has the following beneficial effects:
(1) The spline type stepping motor is adopted to drive the piston rod to rotate and reverse, the structure is simple and compact, the design is novel and reasonable, the occupied space is small, the problem of complex structure in the past is solved, the manufacturing cost is reduced, and the occupied space of the injection pump is reduced;
(2) The liquid injection precision is high, the stability is improved, the liquid injection efficiency is high, the probability of clamping a pump is greatly reduced, and the maintenance is easy.
Drawings
The utility model will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the utility model, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.
Fig. 1 is a schematic structural diagram of a precise numerical control liquid injection pump for reversing a special motor in an embodiment.
Fig. 2 is a cross-sectional view of a precision digitally controlled infusion pump with special motor commutation in an embodiment.
Fig. 3 is a schematic diagram of the structure of the pump in this embodiment after the motor cover is hidden.
Reference numerals: the device comprises a cylinder body 1, a liquid inlet 11, a liquid outlet 12, a piston sleeve 13, a motor cover 2, an electric appliance adapter module 3, a piston rod 41, a piston body 42, a first floating coupler 51, a second floating coupler 52, a bearing 53, a spline type stepping motor 6, a motor body 61, a spline sleeve 62, a spline shaft 63, a fixed shaft type screw rod stepping motor 7, an angle sensor 81, a sensing piece 82 and a machine foot 9.
Detailed Description
The utility model will be further described with reference to the following examples.
The specific implementation mode of the precise numerical control liquid injection pump for reversing the special motor, as shown in fig. 1, comprises a motor cover 2, a cylinder body 1 and an electric appliance adaptation module 3, wherein the motor cover 2 and the cylinder body 1 are fixedly connected, the electric appliance adaptation module 3 is fixedly arranged on the top end surface of the motor cover 2, and the electric appliance adaptation module 3 is provided with a structure for carrying out data transmission with external equipment. In order to avoid the direct contact of the liquid injection pump and the bottom surface, the bottom surface of the motor cover 2 is fixedly connected with a plurality of machine feet 9 which are uniformly distributed at intervals.
Referring to fig. 2, in this embodiment, the liquid injection pump further includes a piston rod 41, a piston body 42 sleeved on the piston rod 41, a spline type stepper motor 6, and a fixed shaft type screw rod stepper motor 7. The cylinder body 1 comprises a bottom cover, a middle shell and an end cover, wherein the bottom cover is fixedly connected with the bottom of the middle shell, the top end of the middle shell is fixedly connected with the end cover, a piston sleeve 13 positioned inside the middle shell is clamped between the end cover and the bottom cover, the end cover, the bottom cover and the piston sleeve 13 jointly enclose a movable cavity positioned inside the cylinder body 1, and a piston body 42 is inserted into the piston sleeve 13. In addition, both sides of the cylinder body 1 are respectively provided with a liquid inlet 11 and a liquid outlet 12 which are communicated with the movable cavity.
In this embodiment, a notch communicated with the movable cavity is formed on the side of the end portion of the piston body 42, a step structure is formed between the notch and the end face of the piston body 42, when the notch is communicated with the liquid outlet 12 in operation, the other side of the end portion of the piston body 42 (the opposite side of the notch) plugs the liquid inlet 11, and is in a liquid outlet mode at this time, when the piston body 42 is driven to change direction by the spline type stepping motor 6, namely, after the piston body 42 rotates 180 degrees, the notch is communicated with the liquid inlet 11, and the other side of the end portion of the piston body 42 plugs the liquid outlet 12, and is in the liquid inlet mode at this time, so that one circulation of reversing is realized.
As an improvement, the spline type stepping motor 6 includes a motor body 61, a spline housing 62 fixedly connected with a working end of the motor body 61, and a spline shaft 63 penetrating through the motor body 61, it should be noted that the motor body 61 can drive the spline shaft 63 to rotate, the spline housing 62 is installed in the motor body 61 as in the conventional spline type stepping motor 6, the spline shaft 63 is inserted into the spline housing 62, balls and sliding grooves are arranged between the spline shaft 63 and the spline housing 62, and the motor body 61 can drive the spline housing 62 and the spline shaft 63 to synchronously rotate, and in addition, under the cooperation of the balls and the sliding grooves, the spline shaft 63 can slide linearly in a reciprocating manner along an axial direction of the spline housing 62. In this embodiment, one end of the spline shaft 63 is fixedly connected with the piston rod 41 through the first floating coupling 51, and the other end of the spline shaft 63 is connected with the driving assembly through the second coupling, and since the spline shaft 63 needs to rotate around its central axis, a bearing 53 is disposed between the spline shaft 63 and the second coupling, so as to enable the spline shaft 63 to rotate relative to the second coupling. In addition, the second floating coupling 52, the spline type stepping motor 6, and the first floating coupling 51 are all installed inside the motor housing 2, and the spline type stepping motor 6 is electrically connected with the electric appliance adapter module 3.
In order to facilitate the control of the rotation angle of the spline shaft 63, an angle sensor 81 for monitoring an induction piece 82 is fixedly mounted in the motor cover 2, the angle sensor 81 is electrically connected with the electrical appliance adaptation module 3, the spline type stepping motor 6 further comprises an induction piece 82, and the induction piece 82 is fixedly mounted on the end face of the spline housing 62.
In the present embodiment, the driving assembly is used for driving the piston rod 41, the first floating coupling 51 and the spline shaft 63 to slide reciprocally in the axial direction of the cylinder 1. As a preferred solution, the driving assembly includes a fixed shaft type screw stepping motor 7 and a second floating coupling 52, the fixed shaft type screw stepping motor 7 can ensure the accuracy when the liquid is injected into the liquid pump, the liquid injection error is reduced, the output shaft of the fixed shaft type screw stepping motor 7 is movably connected with the spline shaft 63 through the second floating coupling 52 and the bearing 53, it should be noted that the fixed shaft type screw stepping motor 7 is a conventional fixed shaft type screw stepping motor 7, and the output shaft thereof can make telescopic linear motion under the driving of the motor.
The working process of the precise numerical control liquid injection pump for reversing the special motor in the embodiment is as follows: the driving assembly drives the second floating coupler 52, the spline shaft 63, the first floating coupler 51 and the piston rod 41 to slide linearly and reciprocally along the axial direction of the cylinder body 1, so that the liquid volume in the movable cavity is changed, the cavity volume is increased to be a liquid suction process, and the cavity volume is reduced to be a liquid discharge process.
In this embodiment, the piston body 42 and the piston sleeve 13 are both ceramic structures, the piston rod 41 is of a stainless steel structure, and is particularly suitable for the field of new energy battery liquid injection, and particularly preferably, SUS316 stainless steel, siC ceramic, teflon and other materials are adopted, so that the corrosion phenomenon caused by battery electrolyte is avoided, and the sanitary level is higher.
The precise numerical control liquid injection pump with the special motor reversing function adopts the spline type stepping motor 6 to drive the piston rod 41 to rotate and reverse, has a simple and compact structure and novel and reasonable design, solves the problem of complex structure in the past, reduces the manufacturing cost and reduces the space volume occupied by the liquid injection pump. In addition, the liquid injection pump has the characteristics of high liquid injection precision, improved stability and high liquid injection efficiency, and the probability of pump clamping is greatly reduced, so that the maintenance is easy. The piston body 42 and the piston sleeve 13 are both ceramic structures, and have the advantages of corrosion resistance, oxidation resistance and long service life, and are suitable for strong acid or alkaline use environments.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model.
Claims (10)
1. The accurate numerical control injection pump of special motor switching-over, its characterized in that includes:
the cylinder body is internally provided with a movable cavity, and is provided with a liquid inlet and a liquid outlet which are respectively communicated with the movable cavity;
the piston rod is fixedly connected with a piston body at the end part of the piston rod, the piston body is inserted into the movable cavity, and a notch communicated with the movable cavity is formed in the side of the end part of the piston body, which faces the cylinder body;
the spline type stepping motor comprises a motor body and a spline shaft penetrating through the motor body, the motor body can drive the spline shaft to rotate, and the end part of the spline shaft is connected with the piston rod through a first floating coupler;
and the driving assembly is used for driving the piston rod, the first floating coupler and the spline shaft to slide back and forth along the axial direction of the cylinder body.
2. The precision numerical control liquid injection pump for reversing a special motor according to claim 1, wherein: the driving assembly comprises a fixed shaft type screw rod stepping motor and a second floating coupler, an output shaft of the fixed shaft type screw rod stepping motor is fixedly connected with one end of the second floating coupler, and the other end of the second floating coupler is connected with the spline shaft through a bearing.
3. The precision numerical control liquid injection pump for reversing a special motor according to claim 2, wherein: and a motor cover is sleeved on the outer peripheral side of the fixed shaft type screw rod stepping motor.
4. A precision numerically controlled liquid injection pump for reversing a special motor as set forth in claim 3, wherein: the motor cover extends towards the cylinder body and is fixedly connected with the cylinder body, so that the motor cover is sleeved on the outer sides of the second floating coupler, the spline type stepping motor and the first floating coupler.
5. The precision numerical control liquid injection pump for reversing a special motor according to claim 4, wherein: the upper end face of the motor cover is fixedly connected with an electric appliance adaptation module, and the electric appliance adaptation module is electrically connected with the spline type stepping motor.
6. The precision numerical control liquid injection pump for reversing a special motor according to claim 5, wherein: the spline type stepping motor further comprises a spline sleeve, the spline sleeve is fixedly connected with the working end of the motor body, and an induction piece is fixedly arranged on the end face of the spline sleeve.
7. The precision numerical control liquid injection pump for reversing a special motor according to claim 6, wherein: and an angle sensor for monitoring the induction piece is fixedly arranged in the motor cover, and the angle sensor is electrically connected with the electric appliance adaptation module.
8. The precision numerical control liquid injection pump for reversing a special motor according to claim 4, wherein: the bottom end surface of the motor cover is fixedly connected with a plurality of machine feet which are uniformly distributed at intervals.
9. The precision numerical control liquid injection pump for reversing a special motor according to claim 1, wherein: the cylinder body comprises a bottom cover, a middle shell and an end cover, wherein the bottom cover is fixedly connected with the bottom of the middle shell, the top end of the middle shell is fixedly connected with the end cover, a piston sleeve positioned inside the middle shell is clamped between the end cover and the bottom cover, and the piston body is inserted into the piston sleeve.
10. The precision numerically controlled liquid injection pump for reversing a special motor according to claim 9, wherein: the piston body and the piston sleeve are both of ceramic structures, and the piston rod is of a stainless steel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321826660.6U CN220705850U (en) | 2023-07-12 | 2023-07-12 | Precise numerical control liquid injection pump for reversing special motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321826660.6U CN220705850U (en) | 2023-07-12 | 2023-07-12 | Precise numerical control liquid injection pump for reversing special motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220705850U true CN220705850U (en) | 2024-04-02 |
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ID=90437458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321826660.6U Active CN220705850U (en) | 2023-07-12 | 2023-07-12 | Precise numerical control liquid injection pump for reversing special motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220705850U (en) |
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2023
- 2023-07-12 CN CN202321826660.6U patent/CN220705850U/en active Active
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