CN105353058A - Automatic reversing liquid phase injection pump - Google Patents
Automatic reversing liquid phase injection pump Download PDFInfo
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- CN105353058A CN105353058A CN201510734221.6A CN201510734221A CN105353058A CN 105353058 A CN105353058 A CN 105353058A CN 201510734221 A CN201510734221 A CN 201510734221A CN 105353058 A CN105353058 A CN 105353058A
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- stepper motor
- pcb board
- commutation
- liquid phase
- linear transmission
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Abstract
The invention provides an automatic reversing liquid phase injection pump. The automatic reversing liquid phase injection pump comprises a pump, a frame, a shifting seat, a reversing stepping motor, a guiding shaft, a driving screw, an anti-backlash nut assembly, a linear bearing, a syringe connection screw, a linear driving stepping motor, a synchronous pulley with safe edges, a synchronous belt, a synchronous pulley without safe edges, a syringe and a control unit. The automatic reversing liquid phase injection pump can guarantee permanent precision cooperation with a screw to realize continuous constant transmission precision so that liquid transmission stability and sensitivity are greatly improved, regular replacement of a screw nut is avoided and a use cost is reduced. Through the guiding shaft parallel to the screw, linearity and smoothness of shifting seat linear movement are guaranteed. The automatic reversing liquid phase injection pump has a compact structure and a high automation degree, realizes high precision, stable and pulseless liquid transmission and is an ideal matching device for medical and laboratorial microscale transfusion.
Description
Technical field
The present invention relates to liquid phase syringe pump technical field, particularly, relate to a kind of in efficient liquid phase chromatographic analysis process and the liquid phase syringe pump automatic capable of reversing of medical and laboratory micro transfusion.
Background technology
In efficient liquid phase chromatographic analysis process, need to use syringe to carry liquid, comprise sampling and the process such as setting-out, the driving of syringe one adopt various driving mechanism or device to realize, wherein infusion pump applications is maximum.
When require to liquid measure must very accurately, very little, the feeding speed of total amount need slow or constant for a long time, then syringe pump should be used to realize this purpose.
The principle of syringe pump: by mechanical hook-up pushing syringe, realize high precision, steady pulseless fluid transport.Syringe pump is made up of stepper motor and driver, screw mandrel and support etc., have move back and forth screw mandrel, feed screw nut, therefore also referred to as screw mandrel pump.During work, control module sends gating pulse makes stepper motor rotate, and stepper motor drives screw mandrel rotary motion to be become the rectilinear motion of feed screw nut, feed screw nut is connected with the piston of syringe, the piston of syringe is made to move back and forth contain fluid in pushing syringe by rotary screw rod, realize high precision, steady pulseless fluid transport.
Ejection of syringe pump mechanism traditional at present all adopts single screw mandrel and fixed leading screw and nut mechanism, and feed screw nut is directly connected with syringe piston, drives syringe piston to move back and forth to realize liquid injection by the rotation of screw mandrel by feed screw nut.
The major defect that syringe pump traditional at present exists is:
1, the gap between screw mandrel and feed screw nut constantly increases along with the increase of service time, makes syringe piston move back and forth precision and constantly declines, cannot guarantee the precision of constant transfusion.
2, fixed feed screw nut can not compensate abrasion automatically, can only regularly replace, and adds the cost of use.
3, feed screw nut is directly connected with syringe piston, and the Form and position error that feed screw nut and installation process produce also directly can affect rectilinearity and the stationarity of the rectilinear motion of syringe piston, thus increases the pulsation of fluid transport.
4, function singleness, can only realize the conveying function of liquid, and the interpolation of liquid by manually completing, can only can not switch fluid path, needs other the equipment such as reversal valve supporting could realize the requirement that commutates.
Summary of the invention
For above shortcomings in prior art, the object of the invention is to propose a kind of automatic liquid phase syringe pump capable of reversing.This automatic liquid phase syringe pump capable of reversing, compact conformation, automaticity is high, can realize high precision, steady pulseless fluid transport, is medical and the desirable support equipment of laboratory micro transfusion, also in efficient liquid phase chromatographic analysis process.
For achieving the above object, the present invention is achieved by the following technical solutions.
A kind of automatic liquid phase syringe pump capable of reversing, comprising: the pump housing, framework, Mobile base, commutation stepper motor, the axis of guide, drive lead screw, the gap that disappears nut assembly, linear bearing, syringe joint bolt, Linear transmission stepper motor, band safe edge synchronous pulley, Timing Belt and without safe edge synchronous pulley; Wherein:
The described pump housing is provided with peripheral hardware mounting hole site, described peripheral hardware mounting hole site comprise be respectively used to framework, mounting hole site that the axis of guide, drive lead screw are installed, the described pump housing is also provided with the installed surface installed for the stepper motor that commutates and pilot hole, be provided with inner chamber for holding two-axle gear, be provided with elongated slot for Mobile base moving linearly;
Described framework be provided with for the pump housing install mounting hole site, be provided with for Linear transmission stepper motor install fitting surface;
Described Mobile base be provided with for linear bearing install mounting hole site, be provided with for syringe joint bolt install mounting hole site, be provided with for disappear gap nut assembly install inner bolt hole;
Described Mobile base is arranged between the axis of guide and drive lead screw, and by the fixing formation two-axle gear of disappear gap nut assembly and linear bearing;
The output shaft end of described Linear transmission stepper motor is provided with band safe edge synchronous pulley, and the end of described drive lead screw is provided with without safe edge synchronous pulley, describedly forms toothed belt transmission pair by Timing Belt with being with safe edge synchronous pulley without safe edge synchronous pulley;
The external thread of described drive lead screw matches with the internal thread of the gap nut assembly that disappears, and forms feed screw nut pair;
The described axis of guide and drive lead screw be arranged in parallel, and and are slidably matched between the linear bearing being placed on the axis of guide.
Preferably, described drive lead screw is also provided with drive lead screw supporting member, described drive lead screw supporting member comprises screw mandrel bearing flange seat, described screw mandrel bearing flange seat is provided with container cavity, the inside of described container cavity is provided with precision bearing, bearing baffle ring and hole back-up ring, described drive lead screw is installed in precision bearing, and described precision bearing is fixed with in the container cavity of screw mandrel bearing flange seat by bearing baffle ring and hole back-up ring; Described screw mandrel bearing flange seat and pump housing assembly connection.
Preferably, the gap that disappears described in nut assembly comprises disappear gap nut body, spring and gasket ring; Wherein, described in disappear gap nut body and Mobile base assembly connection, described spring and gasket ring are installed on respectively and disappear on the cylindrical of gap nut body.
Preferably, the described gap nut body entirety that disappears is for conical external circle, the outside of described conical external circle is provided with outer installation screw thread, the inside of conical external circle is provided with interior motion thread, conical external circle is provided with peripheral flange, the end, outer end of described conical external circle is provided with the some grooves extended to inner end, and terminates in peripheral flange position, forms radial elastic; Described gasket ring is positioned at the end, gap nut body outer end that disappears, and described spring is between gasket ring and peripheral flange.
Preferably, the described axis of guide adopts accurate optical axis.
Preferably, described linear bearing adopts accurate self-centering sliding bearing.
Preferably, the tail end of described Linear transmission stepper motor has Linear transmission grating coding disk by location and installation Plane Installation, and described Linear transmission grating coding disk is provided with some optical transmission window I.
Preferably, the tail end of described commutation stepper motor has commutation grating coding disk by location and installation Plane Installation, and described commutation grating coding disk is provided with some optical transmission window II.
Preferably, described automatic liquid phase syringe pump capable of reversing also comprise following any one or appoint multiple parts:
-syringe; Described syringe is provided with piston screw, and described syringe joint bolt is provided with external thread, and matches with the piston screw of syringe;
-control module;
Described control module comprises:
Control pcb board, described control pcb board is by control PCB installing plate and framework erection; Described control pcb board is used for steering order and exports;
Commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board, described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board all by induction PCB mounting bracket and framework erection, and are installed on the back side of commutation stepper motor and Linear transmission stepper motor respectively; Described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board are respectively used to the steering order detected and FEEDBACK CONTROL pcb board exports;
Preferably, described control pcb board is provided with integrated input dc power supply socket, commutation stepper motor power supply base, Linear transmission stepper motor power supply base, communication serial ports socket, sensor and programmable chip.
Preferably, described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board are provided with integrated input dc power supply socket, photoelectric sensor and programmable chip.
Preferably, commutation stepper motor light sensation pcb board and the photoelectric sensor of Linear transmission stepper motor light sensation pcb board coordinate to be formed with optical transmission window II and optical transmission window I respectively encodes, and described coding is respectively used to control the running of commutate stepper motor and Linear transmission stepper motor and stop position.
Preferably, described control module also comprises:
Magnet mechanism, described magnet mechanism comprises magnet attachment plate and magnet steel, one side assembly connection of described magnet attachment plate and Mobile base, described magnet steel is installed on magnet attachment plate, and coordinates with the sensor controlled on pcb board the extreme limit of travel controlling Mobile base as magnetic induction source.
Automatic liquid phase syringe pump capable of reversing of the present invention, comprises following characteristics:
The pump housing, the described pump housing is provided with described frame installation screw and peripheral hardware mounting hole site; Be provided with installed surface and the pilot hole of transfer valve; Be provided with the inner chamber for holding two-axle gear; Be provided with the elongated slot for described Mobile base 3 moving linearly; Be provided with the threaded hole that described commutation stepper motor is installed;
Framework, described framework is provided with described pump housing mounting hole site; Be provided with the installation of fitting surface for described Linear transmission stepper motor;
Mobile base, described Mobile base is provided with described linear bearing mounting hole site; Be provided with described syringe joint bolt mounting hole site; The gap that disappears described in being provided with nut assembly installs inner bolt hole;
Syringe joint bolt, described syringe joint bolt is provided with external thread, matches with syringe piston screw;
Band safe edge synchronous pulley, described band safe edge synchronous pulley is provided with the hole coordinated with described Linear transmission stepper motor;
Without safe edge synchronous pulley, be describedly provided with the hole coordinated with described drive lead screw without safe edge synchronous pulley;
The gap that disappears nut assembly, described in the gap nut assembly that disappears be provided with the inner bolt hole coordinated with described drive lead screw, the external thread coordinated with described Mobile base, be provided with spring and gasket ring;
Screw mandrel bearing flange seat, described screw mandrel bearing flange seat is provided with and can holds described bearing, bearing baffle ring, the inner chamber that hole is installed with back-up ring; Be provided with the mounting hole assembled with the described pump housing;
Drive lead screw, described drive lead screw is provided with the external thread coordinated with the described gap nut assembly that disappears, and is provided with and the described diameter of axle coordinated without safe edge synchronous pulley, is provided with the diameter of axle with described bearing fit;
Bearing baffle ring, described bearing baffle ring makes axial float to limit precision bearing;
Precision bearing, described precision bearing is assemblied on described drive lead screw, plays a supportive role
Hole back-up ring, described hole back-up ring is loaded in described screw mandrel bearing flange seat groove, makes axial float to limit precision bearing;
Induction PCB mounting bracket, described induction PCB mounting bracket is provided with installs fixing screw with described light sensation pcb board;
The axis of guide, the described axis of guide is straight smooth right cylinder, coordinates with described linear bearing;
Linear bearing, described linear bearing cylindrical is loaded in described mobile bore, and internal diameter coordinates with the described axis of guide;
Linear bearing spacer sleeve, described linear bearing spacer sleeve is loaded between two linear bearings, plays buffer action;
Magnet attachment plate, described magnet attachment plate is provided with mounting hole and described magnet steel reference column.
Magnet steel, described magnet steel is annular, to be installed on described magnet attachment plate;
Control PCB installing plate, described control PCB installing plate is provided with and described control pcb board and described frame installation fixing hole;
Timing Belt, described Timing Belt is provided with standard tooth form, for transmission;
Commutation stepper motor, described commutation stepper motor is provided with the output shaft end of band locating slot, for supporting transfer valve location and installation.
Described commutation stepper motor tail end is provided with the location and installation plane of grating coding disk.
Linear transmission stepper motor, described Linear transmission stepper motor output shaft is provided with the diameter of axle installing synchronous pulley;
Described Linear transmission stepper motor tail end is provided with the location and installation plane of grating coding disk.
Linear transmission grating coding disk, described Linear transmission grating coding disk is provided with some specific printing opacity fenestras and directional hole;
Commutation grating coding disk, described commutation grating coding disk is provided with some specific printing opacity fenestra directional holes;
Control pcb board, described control pcb board is provided with input dc power supply socket, two stepper motor power supply bases, communication serial ports socket, the electronic devices and components such as sensor and programmable chip; Be provided with, with described control PCB installing plate, fixing screw be installed;
Commutation stepper motor light sensation pcb board, described commutation stepper motor light sensation pcb board is provided with input dc power supply socket, the electronic devices and components such as photoelectric sensor and programmable chip; Be provided with, with the described PCB of responding to mounting bracket, fixing hole be installed;
Linear transmission stepper motor light sensation pcb board, described Linear transmission stepper motor light sensation pcb board is provided with input dc power supply socket, the electronic devices and components such as photoelectric sensor and programmable chip; Be provided with, with the described PCB of responding to mounting bracket, fixing hole be installed.
The material of main parts size of the present invention:
The described pump housing, Mobile base, band safe edge synchronous pulley: all adopt aluminium alloy to make;
Described framework, screw mandrel bearing flange seat, induction PCB mounting bracket, magnet attachment plate, control PCB installing plate: all adopt steel to make;
Described syringe joint bolt, drive lead screw, the axis of guide, linear bearing, Linear transmission grating coding disk, commutation grating coding disk: all adopt stainless steel to make.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention devises a kind of can disappear gap feed screw nut and the screw mandrel of auto-compensation abrasion combinationally using, and can ensure that permanent precision-fit is to realize continuous constant transmission accuracy with screw mandrel, greatly raising fluid transport stability and sensitivity; Do not need to regularly replace feed screw nut, reduce the cost of use.
2, the present invention devises a kind of two-axle gear, namely forms stable cross-compound arrangement by the screw axis be parallel to each other and the axis of guide; Feed screw nut is connected with syringe piston non-immediate, but arranges the Mobile base be installed on the axis of guide and screw axis separately, and the coupling mechanism of Mobile base is connected with syringe piston, thus drives syringe piston; Rectilinearity and the stationarity of the rectilinear movement of Mobile base is ensured by the axis of guide be arranged in parallel with screw mandrel.
3, transfusion and commutation integrated design, make syringe pump of the present invention have commutation function, realizes automatically getting liquid and infusion function, as long as configure different liquid valves just can meet the function of getting liquid and transfusion on demand, do not need artificial liquid feeding.
4, the present invention adopts large scale integrated circuit (PCBA) and photoelectric sensor technology, realizes automatic operating and control.
5, automatic liquid phase syringe pump capable of reversing of the present invention, compact conformation, automaticity is high, can realize high precision, steady pulseless fluid transport, is medical and the desirable support equipment of laboratory micro transfusion.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1, Fig. 2, Fig. 3 are respectively the monnolithic case figure of the automatic liquid phase syringe pump capable of reversing of the present invention;
Fig. 4 is the inner structure cut-open view of the automatic liquid phase syringe pump capable of reversing of the present invention;
Fig. 5 is two-axle gear schematic diagram, and wherein, (a) is the structural representation at a visual angle, the structural representation that (b) is another visual angle;
Fig. 6 is pump body structure schematic diagram, and wherein, (a) is the structural representation at a visual angle, the structural representation that (b) is another visual angle;
Fig. 7 is framed structure schematic diagram;
Fig. 8 is Mobile base structural representation;
Fig. 9 is syringe joint bolt structural representation;
Figure 10 is band safe edge synchronous belt wheel structure schematic diagram;
Figure 11 is without safe edge synchronous belt wheel structure schematic diagram;
Figure 12 is gap nut assembly and the design of part schematic diagram of disappearing, wherein, a () is the gap nut assembly stereographic map that disappears, b () disappears gap nut assembly sectional view, c () is the gap nut body structural representation that disappears, d () is spring structure schematic diagram, (e) is gasket ring structural representation;
Figure 13 is screw mandrel bearing flange base structure schematic diagram, and wherein, (a) is the structural representation at a visual angle, the structural representation that (b) is another visual angle;
Figure 14 is drive lead screw structural representation;
Figure 15 is bearing baffle ring structural representation;
Figure 16 is induction PCB mounting support structure schematic diagram;
Figure 17 is axis of guide structural representation;
Figure 18 is linear bearing structural representation;
Figure 19 is linear bearing spacer sleeve schematic diagram;
Figure 20 is magnet attachment plate structural representation;
Figure 21 is magnet structure schematic diagram;
Figure 22 is control PCB mounting plates structure schematic diagram;
Figure 23 is Timing Belt structural representation;
Figure 24 is commutation stepping motor structure schematic diagram, and wherein, (a) is the structural representation at a visual angle, the structural representation that (b) is another visual angle;
Figure 25 is Linear transmission stepping motor structure schematic diagram, and wherein, (a) is the structural representation at a visual angle, the structural representation that (b) is another visual angle;
Figure 26 is Linear transmission grating coding disk structural representation;
Figure 27 is commutation grating coding disk structural representation;
Figure 28 is for controlling pcb board structural representation;
Figure 29 is commutation stepper motor light sensation pcb board structural representation, and wherein, (a) is the structural representation at a visual angle, the structural representation that (b) is another visual angle;
Figure 30 is Linear transmission stepper motor light sensation pcb board structural representation;
In figure:
Numbering designation number title
1 pump housing 16 linear bearing spacer sleeve
2 framework 17 magnet attachment plate
3 Mobile base 18 magnet steels
4 syringe joint bolt 19 control PCB installing plates
5 band safe edge synchronous pulley 20 Timing Belts
6 to commutate stepper motor without safe edge synchronous pulley 21
7 disappear gap nut assembly 22 Linear transmission stepper motor
8 screw mandrel bearing flange seat 23 Linear transmission grating coding disks
9 drive lead screws 24 commutate grating coding disk
10 bearing baffle rings 25 control pcb board
11 precision bearings 26 commutate stepper motor light sensation pcb board
12 holes back-up ring 27 Linear transmission stepper motor light sensation pcb board
13 induction PCB mounting brackets
14 axis of guides
15 linear bearings
Embodiment
Below embodiments of the invention are elaborated: the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Embodiment
Present embodiments provide a kind of automatic liquid phase syringe pump capable of reversing, comprising: the pump housing, framework, Mobile base, commutation stepper motor, the axis of guide, drive lead screw, the gap that disappears nut assembly, linear bearing, syringe joint bolt, Linear transmission stepper motor, band safe edge synchronous pulley, Timing Belt and without safe edge synchronous pulley; Wherein:
The described pump housing is provided with peripheral hardware mounting hole site, described peripheral hardware mounting hole site comprise be respectively used to framework, mounting hole site that the axis of guide, drive lead screw are installed, the described pump housing is also provided with the installed surface installed for the stepper motor that commutates and pilot hole, be provided with inner chamber for holding two-axle gear, be provided with elongated slot for Mobile base moving linearly;
The described pump housing is also provided with other peripheral hardware mounting hole site except the mounting hole site of installing for framework, the axis of guide, drive lead screw;
Described framework be provided with for the pump housing install mounting hole site, be provided with for Linear transmission stepper motor install fitting surface;
Described Mobile base be provided with for linear bearing install mounting hole site, be provided with for syringe joint bolt install mounting hole site, be provided with for disappear gap nut assembly install inner bolt hole;
Described Mobile base is arranged between the axis of guide and drive lead screw, and by the fixing formation two-axle gear of disappear gap nut assembly and linear bearing;
The output shaft end of described Linear transmission stepper motor is provided with band safe edge synchronous pulley, and the end of described drive lead screw is provided with without safe edge synchronous pulley, describedly forms toothed belt transmission pair by Timing Belt with being with safe edge synchronous pulley without safe edge synchronous pulley;
The external thread of described drive lead screw matches with the internal thread of the gap nut assembly that disappears, and forms feed screw nut pair;
The described axis of guide and drive lead screw be arranged in parallel, and and are slidably matched between the linear bearing being placed on the axis of guide.
Further, described drive lead screw is also provided with drive lead screw supporting member, described drive lead screw supporting member comprises screw mandrel bearing flange seat, described screw mandrel bearing flange seat is provided with container cavity, the inside of described container cavity is provided with precision bearing, bearing baffle ring and hole back-up ring, described drive lead screw is installed in precision bearing, and described precision bearing is fixed with in the container cavity of screw mandrel bearing flange seat by bearing baffle ring and hole back-up ring; Described screw mandrel bearing flange seat is by other peripheral hardware mounting hole site and pump housing assembly connection.
Further, the gap that disappears described in nut assembly comprises disappear gap nut body, spring and gasket ring; Wherein, described in disappear gap nut body and Mobile base assembly connection, described spring and gasket ring are installed on respectively and disappear on the cylindrical of gap nut body.
Further, the described gap nut body entirety that disappears is for conical external circle, the outside of described conical external circle is provided with outer installation screw thread, the inside of conical external circle is provided with interior motion thread, conical external circle is provided with peripheral flange, the end, outer end of described conical external circle is provided with the some grooves extended to inner end, and terminates in peripheral flange position, forms radial elastic; Described gasket ring is positioned at the end, gap nut body outer end that disappears, and described spring is between gasket ring and peripheral flange.
Further, the described axis of guide adopts accurate optical axis.
Further, described linear bearing adopts accurate self-centering sliding bearing.
Further, the tail end of described Linear transmission stepper motor has Linear transmission grating coding disk by location and installation Plane Installation, and described Linear transmission grating coding disk is provided with some optical transmission window I.
Further, the tail end of described commutation stepper motor has commutation grating coding disk by location and installation Plane Installation, and described commutation grating coding disk is provided with some optical transmission window II.
Further, described automatic liquid phase syringe pump capable of reversing also comprise following any one or appoint multiple parts:
-syringe; Described syringe is provided with piston screw, and described syringe joint bolt is provided with external thread, and matches with the piston screw of syringe;
-control module;
Described control module comprises:
Control pcb board, described control pcb board is by control PCB installing plate and framework erection; Described control pcb board is used for steering order and exports;
Commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board, described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board all by induction PCB mounting bracket and framework erection, and are installed on the back side of commutation stepper motor and Linear transmission stepper motor respectively; Described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board are respectively used to the steering order detected and FEEDBACK CONTROL pcb board exports;
Further, described control pcb board is provided with integrated input dc power supply socket, commutation stepper motor power supply base, Linear transmission stepper motor power supply base, communication serial ports socket, sensor and programmable chip.
Further, described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board are provided with integrated input dc power supply socket, photoelectric sensor and programmable chip.
Further, commutation stepper motor light sensation pcb board and the photoelectric sensor of Linear transmission stepper motor light sensation pcb board coordinate to be formed with optical transmission window II and optical transmission window I respectively encodes, and described coding is respectively used to control the running of commutate stepper motor and Linear transmission stepper motor and stop position.
Further, described control module also comprises:
Magnet mechanism, described magnet mechanism comprises magnet attachment plate and magnet steel, one side assembly connection of described magnet attachment plate and Mobile base, described magnet steel is installed on magnet attachment plate, and coordinates with the sensor controlled on pcb board the extreme limit of travel controlling Mobile base as magnetic induction source.
Below in conjunction with accompanying drawing, the present embodiment is further described.
As shown in Figure 1, Figure 2, Fig. 3 and the liquid phase syringe pump automatic capable of reversing that Figure 4 shows that, it comprises:
Gear unit: Linear transmission stepper motor 22; Mobile base 3; Band safe edge synchronous pulley 5; Without safe edge synchronous pulley 6; Timing Belt 20; Drive lead screw 9; The gap that disappears nut assembly 7; Screw mandrel bearing flange seat 8; Bearing baffle ring 10; Precision bearing 11; The axis of guide 14; Linear bearing 15;
Reversing unit: commutation stepper motor 21;
Control module: control pcb board 25, commutation stepper motor light sensation pcb board 26, Linear transmission stepper motor light sensation pcb board 27; Linear transmission grating coding disk 23; Commutation grating coding disk 24; Magnet steel 18;
Structural member: the pump housing 1; Framework 2; Induction PCB mounting bracket 13; Magnet attachment plate 17; Control PCB installing plate 19;
Wherein:
The pump housing 1 is provided with for framework 2, the threaded hole that commutation stepper motor 21 is installed, to fix with trip bolt;
The pump housing 1 is provided with for installing the axis of guide 14, the dead eye of drive lead screw 9 and gib screw screw;
The pump housing 1 is provided with the gib screw screw for installing screw mandrel bearing flange seat 8;
The pump housing 1 is provided with the inner chamber for holding two-axle gear;
The pump housing 1 is provided with the elongated slot for Mobile base 3 moving linearly;
The pump housing 1 is provided with installed surface and the pilot hole of transfer valve.
Framework 2 is provided with pilot hole, can install fixing with the pump housing 1 with trip bolt;
Framework 2 is provided with the installation of fitting surface for Linear transmission stepper motor 22;
Framework 2 is hollow structure, and commutate stepper motor 21 and Linear transmission stepper motor 22 and wire are all placed in its inside, play a protective role;
Framework 2 is provided with mounting hole, installs control PCB installing plate 19 with trip bolt.
Mobile base 3 is arranged between the axis of guide 14 and drive lead screw 9, by the main member of the fixing formation two-axle gear (as shown in Figure 5) with disappear gap nut assembly 7 and linear bearing 15.
Mobile base 3 is provided with the installation of installation screw for the gap nut assembly 7 that disappears;
Mobile base 3 is provided with the installation of mounting hole for linear bearing 15;
Mobile base 3 is provided with the installation of mounting hole for syringe joint bolt 4;
Mobile base 3 is driven by the rotation of gap nut assembly 7 by drive lead screw 9 that disappear, and drives and makes the linear reciprocating motion of certain stroke by the syringe piston of syringe joint bolt 4 consolidation thus realize getting the process of liquid and transfusion;
Mobile base 3 is supported by the linear bearing 15 be installed in hole, and linear bearing 15 is installed on the axis of guide 14, makes linear reciprocating motion keep rectilinearity and stationarity by the axis of guide 14, thus ensures the degree of accuracy of getting liquid and transfusion;
Syringe joint bolt 4 is installed on Mobile base 3, and it can be connected with syringe piston screw, and syringe piston can be driven when Mobile base 3 moves to make the linear reciprocating motion of certain stroke thus realize getting the process of liquid and transfusion;
Drive lead screw 9 end is installed without safe edge synchronous pulley 6;
Toothed belt transmission pair is formed by Timing Belt 20 and band safe edge synchronous pulley 5 without safe edge synchronous pulley 6;
Be installed on the output shaft end of Linear transmission stepper motor 22 with safe edge synchronous pulley 5, be delivered to drive lead screw 9 by the rotation of toothed belt transmission adjutant stepper motor, thus realize the rotation of drive lead screw 9;
For ensureing the installation and operation precision of drive lead screw 9, drive lead screw 9 is installed in precision bearing 11, and precision bearing 11 is installed in screw mandrel bearing flange seat 8.The drive lead screw assembly formed by pre-assembled, is screwed in the pump housing 1 cavity by screw mandrel bearing flange seat 8.
Screw mandrel bearing flange seat 8 is provided with and can holds precision bearing 11, bearing baffle ring 10, the inner chamber that hole is installed with back-up ring 12; Be provided with the mounting hole assembled with the pump housing 1; It is the supporting member of drive lead screw 9;
Drive lead screw 9 is provided with accurate external thread, and the internal thread be provided with the gap nut assembly 7 that disappears matches, and form feed screw nut pair, the circular motion of drive lead screw 9 is converted into the rectilinear motion of Mobile base 3 by the gap nut assembly 7 that disappears;
The composition of the gap that disappears nut assembly 7 as shown in figure 12, by the gap nut body that disappears, spring, gasket ring form;
The gap that disappears nut body is made by the engineering plastics of high-wearing feature and self-lubricating property, and be provided with outer installation screw thread, interior motion thread, conical external circle and some grooves, have certain radial elastic;
With Mobile base 3 consolidation in the internal thread that the gap that disappears nut body is installed on Mobile base 3, spring, gasket ring is installed on and disappears on gap nut body cylindrical, and gasket ring is positioned at the outer cone side of the gap nut body that disappears, and spring is at gasket ring and disappear between gap nut body; When feed screw nut pair has abrasion, the acting force of spring can promote gasket ring and make radial shrinkage by the Outer Taper of the gap nut body that disappears make the to disappear internal thread of gap nut body, thus internal and external threads is in all the time closely cooperate, the gap of automatic elimination feed screw nut, to keep accurate transmission accuracy, thus guarantee constant to get liquid and transfusion precision.
The axis of guide 14 is accurate optical axis, is installed in the hole set by the pump housing 1, parallel with drive lead screw 9, and for being slidably matched between cover linear bearing 15 thereon, makes Mobile base 3 on the axis of guide 14, be made the linear reciprocating motion of certain stroke by linear bearing 15.
Linear bearing 15 is accurate self-centering sliding bearing, is installed in Mobile base 3 hole, with the axis of guide 14 for being slidably matched, ensures rectilinearity and the stationarity of the rectilinear motion of Mobile base 3.Adopt two linear bearings 15, centre linear bearing spacer sleeve 16 does interval;
Magnet attachment plate 17, is installed on the side of Mobile base 3, for the installation of magnet steel 18; Magnet steel 18 is used as magnetic induction source, coordinates with the sensor be arranged on pcb board the extreme limit of travel controlling Mobile base 3, in order to avoid cross stroke;
Linear transmission stepper motor 22 is installed on the installed surface set by framework 2, for the rectilinear motion of Mobile base 3 provides power.The output shaft mounting strap safe edge synchronous pulley 5 of Linear transmission stepper motor 22, by Timing Belt 20, drive without safe edge synchronous pulley 6, drive drive lead screw 9 again, thus drive and to disappear gap nut assembly 7 and Mobile base 3, final drive syringe piston to make certain stroke linear reciprocating motion thus realize getting the process of liquid and transfusion;
The tail end of Linear transmission stepper motor 22 is provided with the location and installation plane of Linear transmission grating coding disk 23.
Linear transmission grating coding disk 23 is installed on the tail end of Linear transmission stepper motor 22, and it is provided with some specific printing opacity fenestras, coordinates form certain coding with photovoltaic sensing element, can control the running of stepper motor and stop position.
Commutation stepper motor 21 is installed on the installed surface set by the pump housing 1, and its output shaft end is provided with location groove, for supporting transfer valve location and installation, is directly connected provides power for fluid path switches with transfer valve.
Commutation stepper motor 21 tail end is provided with the location and installation plane of commutation grating coding disk 24.
Commutation grating coding disk 24 is installed on the tail end of commutation stepper motor 21, and it is provided with some specific printing opacity fenestras, coordinates form certain coding with photovoltaic sensing element, can control the running of stepper motor and stop position.
Control PCB installing plate 19 is provided with and controls the mounting hole of pcb board 25, and the mounting hole installed with framework 2;
Control pcb board 25 and be provided with input dc power supply socket, two stepper motor power supply bases, communication serial ports socket, the electronic devices and components such as sensor and programmable chip;
Control pcb board 25 is provided with installs fixing screw with described control PCB installing plate 19;
Controlling pcb board 25 is large scale integrated circuit plate, is that the instruction of control module exports core component;
Commutation stepper motor light sensation pcb board 26, Linear transmission stepper motor light sensation pcb board 27 are surface-mounted integrated circuit, are provided with input dc power supply socket, the electronic devices and components such as photoelectric sensor and programmable chip; Input and the feedback element of control module;
Control pcb board 25, commutation stepper motor light sensation pcb board 26, Linear transmission stepper motor light sensation pcb board 27 form the key control unit of this syringe pump, can realize and control two stepper motors do specific operation by program.
Induction PCB mounting bracket 13 for installing and fixing described commutation stepper motor light sensation pcb board 26, Linear transmission stepper motor light sensation pcb board 27, and is individually fixed in the back side of two stepper motors, has protective action to two grating coding disks.
The liquid phase syringe pump automatic capable of reversing that the present embodiment provides:
Devise a kind of can the gap feed screw nut that disappear of auto-compensation abrasion, can ensure that permanent precision-fit is to realize continuously constant transmission accuracy with screw mandrel, improve fluid transport stability and sensitivity.
Devise a kind of two-axle gear, namely form stable cross-compound arrangement by the screw axis be parallel to each other and the axis of guide; Feed screw nut and the non-direct connection of syringe piston, arrange the Mobile base be installed on the axis of guide and screw axis separately, the coupling mechanism of Mobile base is connected with syringe piston, thus drives syringe piston.Rectilinearity and the stationarity of the rectilinear movement of Mobile base is ensured by the axis of guide be arranged in parallel with screw mandrel.
Transfusion and commutation integrated design, machine volume is little, simple and compact for structure; There is commutation function, can realize automatically getting liquid and infusion function, as long as configure different liquid valves just can meet the function of getting liquid and transfusion on demand.
Adopt large scale integrated circuit (PCBA) and sensor technology, by the run action of programmable chip by program setting stepper motor, position realizes instant detection and feedback, realizes complete machine and runs robotization.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (10)
1. an automatic liquid phase syringe pump capable of reversing, it is characterized in that, comprising: the pump housing, framework, Mobile base, commutation stepper motor, the axis of guide, drive lead screw, the gap that disappears nut assembly, linear bearing, syringe joint bolt, Linear transmission stepper motor, band safe edge synchronous pulley, Timing Belt and without safe edge synchronous pulley; Wherein:
The described pump housing is provided with peripheral hardware mounting hole site, described peripheral hardware mounting hole site comprise be respectively used to framework, mounting hole site that the axis of guide, drive lead screw are installed, the described pump housing is also provided with the installed surface installed for the stepper motor that commutates and pilot hole, be provided with inner chamber for holding two-axle gear, be provided with elongated slot for Mobile base moving linearly;
Described framework be provided with for the pump housing install mounting hole site, be provided with for Linear transmission stepper motor install fitting surface;
Described Mobile base be provided with for linear bearing install mounting hole site, be provided with for syringe joint bolt install mounting hole site, be provided with for disappear gap nut assembly install inner bolt hole;
Described Mobile base is arranged between the axis of guide and drive lead screw, and by the fixing formation two-axle gear of disappear gap nut assembly and linear bearing;
The output shaft end of described Linear transmission stepper motor is provided with band safe edge synchronous pulley, and the end of described drive lead screw is provided with without safe edge synchronous pulley, describedly forms toothed belt transmission pair by Timing Belt with being with safe edge synchronous pulley without safe edge synchronous pulley;
The external thread of described drive lead screw matches with the internal thread of the gap nut assembly that disappears, and forms feed screw nut pair;
The described axis of guide and drive lead screw be arranged in parallel, and and are slidably matched between the linear bearing being placed on the axis of guide.
2. automatic liquid phase syringe pump capable of reversing according to claim 1, it is characterized in that, described drive lead screw is also provided with drive lead screw supporting member, described drive lead screw supporting member comprises screw mandrel bearing flange seat, described screw mandrel bearing flange seat is provided with container cavity, the inside of described container cavity is provided with precision bearing, bearing baffle ring and hole back-up ring, described drive lead screw is installed in precision bearing, and described precision bearing is fixed with in the container cavity of screw mandrel bearing flange seat by bearing baffle ring and hole back-up ring; Described screw mandrel bearing flange seat and pump housing assembly connection.
3. automatic liquid phase syringe pump capable of reversing according to claim 1, is characterized in that, described in the gap nut assembly that disappears comprise disappear gap nut body, spring and gasket ring; Wherein, described in disappear gap nut body and Mobile base assembly connection, described spring and gasket ring are installed on respectively and disappear on the cylindrical of gap nut body.
4. automatic liquid phase syringe pump capable of reversing according to claim 3, it is characterized in that, the described gap nut body entirety that disappears is for conical external circle, the outside of described conical external circle is provided with outer installation screw thread, the inside of conical external circle is provided with interior motion thread, and conical external circle is provided with peripheral flange, and the end, outer end of described conical external circle is provided with the some grooves extended to inner end, and terminate in peripheral flange position, form radial elastic; Described gasket ring is positioned at the end, gap nut body outer end that disappears, and described spring is between gasket ring and peripheral flange.
5. automatic liquid phase syringe pump capable of reversing according to claim 1, is characterized in that, the described axis of guide adopts optical axis;
Described linear bearing adopts self-centering sliding bearing.
6. automatic liquid phase syringe pump capable of reversing according to claim 1, it is characterized in that, the tail end of described Linear transmission stepper motor has Linear transmission grating coding disk by location and installation Plane Installation, and described Linear transmission grating coding disk is provided with some optical transmission window I;
The tail end of described commutation stepper motor has commutation grating coding disk by location and installation Plane Installation, and described commutation grating coding disk is provided with some optical transmission window II.
7. automatic liquid phase syringe pump capable of reversing according to any one of claim 1 to 6, is characterized in that, described automatic liquid phase syringe pump capable of reversing also comprise following any one or appoint multiple parts:
-syringe; Described syringe is provided with piston screw, and described syringe joint bolt is provided with external thread, and matches with the piston screw of syringe;
-control module;
Described control module comprises:
Control pcb board, described control pcb board is by control PCB installing plate and framework erection; Described control pcb board is used for steering order and exports;
Commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board, described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board all by induction PCB mounting bracket and framework erection, and are installed on the back side of commutation stepper motor and Linear transmission stepper motor respectively; Described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board are respectively used to the steering order detected and FEEDBACK CONTROL pcb board exports.
8. automatic liquid phase syringe pump capable of reversing according to claim 7, it is characterized in that, described control pcb board is provided with integrated input dc power supply socket, commutation stepper motor power supply base, Linear transmission stepper motor power supply base, communication serial ports socket, sensor and programmable chip;
Described commutation stepper motor light sensation pcb board and Linear transmission stepper motor light sensation pcb board are provided with integrated input dc power supply socket, photoelectric sensor and programmable chip.
9. automatic liquid phase syringe pump capable of reversing according to claim 7, it is characterized in that, the tail end of described Linear transmission stepper motor has Linear transmission grating coding disk by location and installation Plane Installation, and described Linear transmission grating coding disk is provided with some optical transmission window I; The tail end of described commutation stepper motor has commutation grating coding disk by location and installation Plane Installation, and described commutation grating coding disk is provided with some optical transmission window II; Commutation stepper motor light sensation pcb board and the photoelectric sensor of Linear transmission stepper motor light sensation pcb board coordinate to be formed with optical transmission window II and optical transmission window I respectively encodes, and described coding is respectively used to control the running of commutate stepper motor and Linear transmission stepper motor and stop position.
10. automatic liquid phase syringe pump capable of reversing according to claim 8, it is characterized in that, described magnet mechanism comprises magnet attachment plate and magnet steel, one side assembly connection of described magnet attachment plate and Mobile base, described magnet steel is installed on magnet attachment plate, and coordinates with the sensor controlled on pcb board the extreme limit of travel controlling Mobile base as magnetic induction source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510734221.6A CN105353058A (en) | 2015-11-02 | 2015-11-02 | Automatic reversing liquid phase injection pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510734221.6A CN105353058A (en) | 2015-11-02 | 2015-11-02 | Automatic reversing liquid phase injection pump |
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| CN105353058A true CN105353058A (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510734221.6A Pending CN105353058A (en) | 2015-11-02 | 2015-11-02 | Automatic reversing liquid phase injection pump |
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| CN (1) | CN105353058A (en) |
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