CN203532649U - Linear movement mechanism with lead screw nut - Google Patents
Linear movement mechanism with lead screw nut Download PDFInfo
- Publication number
- CN203532649U CN203532649U CN201320713113.7U CN201320713113U CN203532649U CN 203532649 U CN203532649 U CN 203532649U CN 201320713113 U CN201320713113 U CN 201320713113U CN 203532649 U CN203532649 U CN 203532649U
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- CN
- China
- Prior art keywords
- guide
- guide rod
- nut
- pin bushing
- screw nut
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model provides a linear movement mechanism with a lead screw nut. According to the mechanism, a motor and a guide sleeve are mounted in positioning holes in two ends of a U-shaped fixing frame respectively, a guide rod and a nut are connected into a whole, the guide rod is a hollow cylinder, a guide plane is arranged on the outer side of the guide rod, a boss is arranged in an inner hole of the guide sleeve, the fit clearance between the guide rod and the guide sleeve is 0.10-0.15mm, and the guide sleeve is made of PTFE (polytetrafluoroethylene). The linear movement mechanism is simple in structure, convenient to machine and mount, flexible and reliable in movement, noiseless and fine in use effect, is used for analyzing liquid measurement, and can accurately control liquid sampling.
Description
Technical field
The utility model relates to a kind of feed screw nut's straight-line motion mechanism, is mainly used in liquid measure analytic process, and got liquid sample volume accurate quantification is controlled.
Background technique
In the electrochemical analytical instrument of laboratory, there is a kind of Automatic Titration, for got fluid sample is accurately measured.This device adopts a kind of straight-line motion mechanism, drives the piston back-and-forth movement in probe tube, and the liquid in probe tube is accurately sampled, and can realize this process by feed screw nut and guiding element.In existing said mechanism, nut and a bearing or sleeve pipe are linked together, by bearing, in a rolling being parallel on the guide rail of screw mandrel axis, or conduit is placed on the guide shaft being parallel on screw mandrel axis, realizes the straight line motion of nut.These two kinds of methods all have obvious shortcoming.The rolling of bearing on guide rail, inevitably will produce vibration, thereby forms noise; And guide shaft is when install, it is very high that its parallelism for screw mandrel requires, if parallelism surpasses tolerance, will increase the moment of torsion of motor, exceeds the load of motor, may cause motor effectively to rotate.
Model utility content
The purpose of this utility model is to overcome deficiency of the prior art, provides that a kind of processing is easy for installation, reliable, muting feed screw nut's straight-line motion mechanism moves.
The technical solution of the utility model is: a kind of feed screw nut's straight-line motion mechanism, comprise fixing frame, motor, coupling piece, screw mandrel, nut and guiding element, its improvements are that described guiding element consists of the guide rod being slidably matched and guide pin bushing, guide rod is connected with nut, there is guide surface in the outside of guide rod, in the endoporus of guide pin bushing, has guide ledges.
Describedly fixedly put up " Contraband " shape, motor and guide pin bushing are arranged on respectively in the positioning hole at fixing frame two; Described guide rod is hollow cylinder, and there is a plane in outside, and the matching gap of guide rod and guide pin bushing is 0.10～0.15mm; The material of described guide pin bushing is wear-resisting nonmetallic material PTFE.
The utility model changes the traditional straight-line motion mechanism in related domain, directly nut and guide rod is connected together, and guide rod outside is as guide surface; Guide rod is circular, adopts common on the market circular metal bar, and one processes internal thread, and as nut, the flat one side of outer side milling can not rotated in guide pin bushing.Guide pin bushing can adopt line cutting process, and interior hole shape is identical with guide rod, leaves the gap of 0.10mm to 0.15mm, the nonmetallic material that material selection is wear-resisting
,as PTFE.PTFE serviceability temperature scope is very extensive, has fabulous mechanical property, good insulation characterisitic, and water absorption rate is low, and has the performance of a series of uniquenesses such as self lubricity and non-viscosity.The utility model is simple in structure, processes easy for installationly, and the coaxality of guide rod, guide pin bushing is guaranteed, motion flexibility and reliability, and noiseless.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is A-A place sectional drawing in Fig. 1.
Embodiment
Referring to Fig. 1,2, half I-shaped i.e. " Contraband " shape fixing frames 6 respectively have up and down a positioning hole, mounting guide sleeve 2 and motor 7, guarantee its coaxality respectively.Screw mandrel 4 is linked together by coupling piece 5 and motor shaft; Guide pin bushing 2 and fixing frame 6 drive fits, and add a pin 8.Guide rod 9 is connected with nut 3, and guide rod is hollow cylinder, and outside mills out a plane, and guide rod and guide pin bushing matching gap are 0.15mm, and guide pin bushing is PTFE material, has boss in endoporus, nut 3 and screw mandrel 4 scyewed joint.Under Single-chip Controlling, motor 7 rotates, drive screw mandrel 4 synchronously to rotate, under the restriction and leading role of guide pin bushing 2, nut 3 and guide rod 9 moving linearlies, the straight line motion of guide rod 9, is the straight line motion of sample introduction piece 1, thereby the piston back-and-forth movement in promotion volume weight tube, make liquid in probe tube in absorbing, emptying state.By pulse signal, pass to motor, control rotating speed and the direction of motor, thereby accurately liquid is carried out to sample analysis.
Claims (4)
1. feed screw nut's straight-line motion mechanism, comprise fixing frame, motor, coupling piece, screw mandrel, nut and guiding element, it is characterized in that described guiding element consists of the guide rod being slidably matched and guide pin bushing, guide rod is connected with nut, there is guide surface in the outside of guide rod, in the endoporus of guide pin bushing, has guide ledges.
2. by feed screw nut's straight-line motion mechanism described in claim 1, it is characterized in that described " Contraband " shape of fixedly putting up, motor and guide pin bushing are arranged on respectively in the positioning hole at fixing frame two.
3. by feed screw nut's straight-line motion mechanism described in claim 1, it is characterized in that described guide rod is hollow cylinder, there is a plane in outside, and the matching gap of guide rod and guide pin bushing is 0.10～0.15mm.
4. by feed screw nut's straight-line motion mechanism described in claim 1, the material that it is characterized in that described guide pin bushing is wear-resisting nonmetallic material PTFE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320713113.7U CN203532649U (en) | 2013-11-13 | 2013-11-13 | Linear movement mechanism with lead screw nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320713113.7U CN203532649U (en) | 2013-11-13 | 2013-11-13 | Linear movement mechanism with lead screw nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203532649U true CN203532649U (en) | 2014-04-09 |
Family
ID=50418860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320713113.7U Expired - Fee Related CN203532649U (en) | 2013-11-13 | 2013-11-13 | Linear movement mechanism with lead screw nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203532649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603930A (en) * | 2013-11-13 | 2014-02-26 | 江苏东华分析仪器有限公司 | Screw rod-nut linear movement mechanism |
| CN107399014A (en) * | 2017-06-19 | 2017-11-28 | 河海大学 | A kind of soft clay hollow cylinder sample inner core spiral cutter and its application method |
-
2013
- 2013-11-13 CN CN201320713113.7U patent/CN203532649U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603930A (en) * | 2013-11-13 | 2014-02-26 | 江苏东华分析仪器有限公司 | Screw rod-nut linear movement mechanism |
| CN107399014A (en) * | 2017-06-19 | 2017-11-28 | 河海大学 | A kind of soft clay hollow cylinder sample inner core spiral cutter and its application method |
| CN107399014B (en) * | 2017-06-19 | 2019-11-12 | 河海大学 | A kind of soft clay hollow cylinder sample inner core spiral cutter and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20141113 |
|
| EXPY | Termination of patent right or utility model |