CN102242457B - Method and device for selecting magnetic levitation driven needle - Google Patents
Method and device for selecting magnetic levitation driven needle Download PDFInfo
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- CN102242457B CN102242457B CN 201110098202 CN201110098202A CN102242457B CN 102242457 B CN102242457 B CN 102242457B CN 201110098202 CN201110098202 CN 201110098202 CN 201110098202 A CN201110098202 A CN 201110098202A CN 102242457 B CN102242457 B CN 102242457B
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- knitting needle
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- needle
- electromagnetic actuator
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Abstract
The invention provides a method and a device for selecting a magnetic levitation driven needle. A pattern bit, a needle jack, a needle and a triangle in a traditional weaving structure are integrated together. In an action process, an impact friction and a lateral force do not exist between the needle and a needle shell base, thereby realizing a high-speed and magnetic levitation controlled needle three-position motion. The device for selecting the magnetic levitation driven needle has the advantages that the structure is simple, the cost is low, the service life is long, and the like.
Description
Technical field
The present invention relates to a kind of magnetic suspension and drive knitting needle method for selecting needle and device, be specially knitting needle method for selecting needle and the device of knitting computer jacquard circle latitude machine, belong to the textile machine product technical field.
Background technology
in textile machine, the jacquard weave large circle machine is to carry out jacquard weave on fabric, thereby weave various colored types and pattern devices, mainly by giving yarn mechanism, looping mechanism, the tractive coiled body, transmission mechanism and auxiliary body form, the method for selecting needle of knitting needle and the design of structure, it is the direction of Modern New loom technological improvement, the electronic needle selecting device of existing known knitting computer jacquard circle latitude machine is mainly electromagnetic type and piezoelectric type, they are all to utilize triangular cam, pattern bit, the components of machine such as needle jack are realized needle selection, due to knitting needle by with triangular cam contact to realize weaving up and down motion, therefore, knitting mechanism exists triangular cam to impact friction and side force to knitting needle.Along with the improving constantly of rotary speed of knitting machine (as computer jacquard circle latitude machine in the 15-20rpm left and right, the needle-selecting blade frequency is in 100Hz), performance requirement to knitting needle and triangular cam is higher, when the intensity of knitting needle and triangular cam itself, ABRASION RESISTANCE etc. have reached limit degree, just limited the further raising of rotating speed.According to statistics, improve the aspects such as design if at present domestic and international corporate boss concentrates on material wear ability, Technology for Heating Processing and the knitting needle external form details of knitting needle, and knitting needle driving principle and structure are not carried out any change.Non-contact type adopts magnetic suspension principle to drive high speed method for selecting needle and the device of knitting needle, does not see in existing patent and correlation technique document.
Summary of the invention
The present invention is directed to the described problem of background technology, propose a kind of magnetic suspension and drive knitting needle method for selecting needle and device, it combines the pattern bit in traditional braided structure, needle jack, knitting needle and triangle together, knitting needle is in course of action, there are not impact friction and side force with pin shell base, can realize knitting needle " three stations " motion of high speed, the control formula that can suspend, have simple in structure, cost is low, the characteristics such as long service life.
Technical scheme of the present invention is: magnetic suspension drives the knitting needle needle selecting device, comprise knitting needle, pin shell, permanent magnet, displacement transducer, electromagnetic actuator device and control system, knitting needle is arranged in columnar pin shell, and the bottom of knitting needle is cylinder, and the head of knitting needle is rectangle; It is characterized in that: the inner oriented projecting inward knitting needle radial support face of described pin shell; Described permanent magnet is disc, and permanent magnet is arranged on the bottom of knitting needle and coaxial with knitting needle bottom; Described displacement transducer by moving pole piece and fixedly pole piece form, moving pole piece is plated on the outer surface in knitting needle stage casing, there are two embedded fixedly pole pieces the inboard in the middle part of the pin shell; The bottom of described pin shell is electromagnetic actuator device, and being arranged on control system on loom has wire to be connected with fixedly pole piece on electromagnetic actuator device and pin shell; The upper surface of electromagnetic actuator device is pasted with sheet rubber; Described moving pole piece with the fixing position relationship between pole piece is: at knitting needle bottom permanent magnet during with reset condition that electromagnetic actuator device upper surface sheet rubber contacts, first fixedly pole piece be positioned at moving pole piece top, second fixedly pole piece be positioned at first fixedly pole piece top, knitting needle can slide up and down in pin shell inside.its beneficial effect is: setting knitting needle is the first station when reset condition, first in moving pole piece on knitting needle and pin shell fixedly pole piece near the time the position be the second station, in moving pole piece on knitting needle and pin shell second fixedly pole piece near the time the position be the 3rd station, utilize magnetic suspension method in work, the magnetic force moving knitting needle rises to the second station or the 3rd station by the first station and hovers after a period, return the first station, go round and begin again, realize at a high speed, the knitting needle of the control formula that can suspend " three stations " motion, impact friction and the side force of avoiding the needle selecting device of prior art that knitting needle is caused.
Magnetic suspension as above drives the knitting needle needle selecting device, and described displacement transducer is the differential capacitance displacement transducer, is comprised of fixedly pole piece and moving pole piece, and fixedly pole piece and moving pole piece are cylindric concentric structure, fixedly inboard in the middle part of pole piece embedding pin shell; It is characterized in that: the fixedly pole piece that embeds pin shell inboard is circular, circle ring inner surface is from the ceramic material substrate that radially is coated with successively circular ring type, argent coating, metal rhodium coating and the polyethylene coating in the export-oriented center of circle, axially go up, also have three equipotential ring coating with above-mentioned circular ring type coating isolation separately; Being plated in the moving pole piece on the outer surface of knitting needle stage casing, from external cylindrical surface to the center of circle radially, is metal rhodium coating, argent coating and the ceramic material substrate of circular ring type successively.Its beneficial effect is: metal rhodium coating helps to reduce the temperature coefficient of pole piece, and electric conductivity and the relative sealing of raising electrode, polyethylene coating is conducive to improve dielectric constant and increases capacitance, and the equipotential ring is conducive to reduce edge effect to the impact of capacitive means.
magnetic suspension drives the knitting needle method for selecting needle, it is characterized in that: be to adopt magnetic suspension method, drive the knitting needle electronic needle selecting device and risen to the method that returns the first station after the second station or the 3rd station by the first station, position when described the first station refers to knitting needle bottom permanent magnet and sheet rubber on electromagnetic actuator device contacts, described the second station refer in moving pole piece on knitting needle and pin shell first fixedly pole piece near the time the position, the second station is higher than the first station, described the 3rd station refer in moving pole piece on knitting needle and pin shell second fixedly pole piece near the time the position, the 3rd station is higher than the second station, control system by loom in work loads corresponding electric current to the electromagnetic actuator device in knitting-needle device, the magnetic field that produces after the electromagnetic actuator device energising and the magnetic field of permanent magnet bottom knitting needle are same polarity, the permanent magnet that repels the knitting needle bottom, promote knitting needle along the axial rising of pin shell, the displacement signal that the simultaneous displacement sensor detects knitting needle is sent to control system, control the second station or the 3rd station that knitting needle arrives appointment, and hover over the second station or the 3rd station after period, control system disconnects the electromagnetic actuator device power supply again, knitting needle is because of attraction between the iron core of bottom permanent magnet and electromagnetic actuator device and the effect of knitting needle self gravitation, the first station hurtles down, go round and begin again, regulate the drive current size of electromagnetic actuator device, can control knitting needle and hover over the second station or the 3rd station position.Its beneficial effect is: the present invention has broken through the restriction on suffered mechanism and principle when promoting the knitting mechanism performance of traditional Knitting Machinery, have high-speed, high efficiency, low-cost characteristics.
Description of drawings
Accompanying drawing 1 is embodiment of the present invention knitting needle outside drawing;
Accompanying drawing 2 is the left view of Fig. 1;
Accompanying drawing 3 is Fig. 1 axle sectional view;
Accompanying drawing 4 is the displacement transducer schematic internal view.
The specific embodiment
Mark in accompanying drawing:
In accompanying drawing 1, accompanying drawing 2,1-knitting needle, 3-pin shell.
In accompanying drawing 3,2-fixedly pole pieces, 2 '-fixedly pole piece, 3-pin shell, 4-electromagnetic actuator device, 5-permanent magnet, 6-moving pole piece, 7-radial support face, 8-sheet rubber.
In accompanying drawing 4,2-fixedly pole piece A, 9-equipotential ring, the substrate of 10-ceramic material, 11-silvering, 12-rhodium coating, 13-polyethylene coating, the substrate of 14-ceramic material, 15-silvering, 16-rhodium coating.
Below in conjunction with accompanying drawing, the embodiment of the present invention is further illustrated:
As shown in attached Fig. 1 and 2, middle knitting needle for computer jacquard circle latitude machine, remaining also has outside knitting needle and inboard knitting needle, the medial and lateral knitting needle be the knitting needle head be the right-angle bending shape, its bottom is the cylinder cross section, knitting needle head cross section is rectangle, and the present invention only carries out the embodiment explanation and gets final product as an example of middle knitting needle example.
Magnetic suspension drives the knitting needle needle selecting device, by knitting needle 1, pin shell 3, permanent magnet 5, displacement transducer, electromagnetic actuator device 4 and composition of the control system, knitting needle 1 is arranged in columnar pin shell 3, and the bottom of knitting needle 1 is the cylinder cross section, and the head of knitting needle 1 is the square-section.The inner oriented projecting inward knitting needle radial support face 7 of pin shell 3; Permanent magnet 5 is disc, and permanent magnet 5 is arranged on the bottom of knitting needle 1, and coaxial with knitting needle 1 bottom; Displacement transducer by moving pole piece 6 and fixedly pole piece 2 and 2 ' form, move pole piece 6 and be plated on the outer surface in knitting needle stage casing, there are two embedded fixedly pole pieces 2 and 2 ' pin shell 3 inboards, middle part; The bottom of pin shell 3 is electromagnetic actuator devices 4, and being arranged on control system on loom has wire to be connected with 2 ' with fixedly pole piece 2 on electromagnetic actuator device 4 and pin shell 3; The upper surface of electromagnetic actuator device 4 is pasted with sheet rubber 8.Moving pole piece 6 with the fixing position relationship between pole piece is: when permanent magnet 5 is with reset condition that electromagnetic actuator device 4 upper surface sheet rubbers 8 contact bottom knitting needle, first fixedly pole piece 2 ' be positioned at moving pole piece 6 tops, second fixedly pole piece 2 be positioned at first fixedly pole piece 2 ' top.
referring to accompanying drawing 4, displacement transducer is the differential capacitance displacement transducer, by fixing pole piece 2, 2 ' (only draws fixedly pole piece 2 with moving pole piece composition in figure, 2 ' is identical with 2), fixedly pole piece 2 and moving pole piece are cylindric concentric structure, it is inboard that fixedly pole piece 2 embeds pin shell 3 middle parts, fixedly pole piece 2 is circular, circle ring inner surface from the export-oriented center of circle radially, be coated with successively the ceramic material substrate 10 of circular ring type, argent coating 11, metal rhodium coating 12 and polyethylene coating 13, axially go up, also have three equipotential ring coating 9 with above-mentioned circular ring type coating isolation separately, being plated in the moving pole piece on knitting needle 1 stage casing outer surface, from external cylindrical surface to the center of circle radially, is metal rhodium coating 16, argent coating 15 and the ceramic material substrate 14 of circular ring type successively.
magnetic suspension of the present invention drives the knitting needle method for selecting needle, its course of action is as follows: during reset condition, knitting needle 1 vertically is arranged in pin shell 3, it radially has the radial support face 7 in pin shell 3 to support, the sheet rubber 8 of pasting on the lower end permanent magnet 5 of knitting needle 1 and electromagnetic actuator device 4 contacts, and this is the first station of knitting needle 1, when loom control system loads corresponding electric current to the electromagnetic actuator device 4 in knitting needle 1, electromagnetic actuator device 4 energisings, produce the permanent magnet 5 identical polar magnetic fields with knitting needle 1 bottom, this magnetic field is repelled permanent magnet 5 and is driven knitting needle 1 along the axial rising of pin shell 3, when in the moving pole piece 6 on knitting needle 1 and pin shell 3 first fixedly pole piece 2 ' near the time (the second station), the displacement signal that control system detects knitting needle 1 is in the second station, this moment, knitting needle 1 hovered over the second station, hover time is settings, when technological requirement knitting needle 1 continues to rise, control system adds large-drive-current, knitting needle 1 is to rising, same, when second on the moving pole piece 6 on knitting needle 1 and pin shell 3 fixedly pole piece 2 near the time (the 3rd station), the displacement signal that control system detects knitting needle 1 is in the 3rd station, this moment, knitting needle 1 hovered over the 3rd station, and hover over the 3rd station certain hour by technological requirement.knitting needle 1 hovers at the second station or the 3rd station certain hour and after fulfiling assignment, control system disconnects electromagnetic actuator device 4 power supplys, knitting needle 1 is because of attraction between the iron core of bottom permanent magnet 5 and electromagnetic actuator device 4, the superposition that also has the knitting needle self gravitation, make knitting needle 1 initial position (the first station) that hurtles down, go round and begin again, regulate the drive current of electromagnetic actuator device, can control the position of hovering of knitting needle, the present invention has broken through the restriction on suffered mechanism and principle when promoting the knitting mechanism performance of traditional Knitting Machinery, have high-speed, high efficiency, low-cost characteristics.
In the embodiment of the present invention, knitting needle 1 is at the hover time～4ms of each station, and its positioning accuracy is 0.2mm, and knitting needle operating frequency (frequency that pumps) is not less than 100Hz, and reciprocating working stroke is 10mm approximately.
The efficient that is below the embodiment of the present invention and traditional computer jacquard (adopting eight grades of needle selecting devices) compares:
If have 2256 knitting needles in traditional jacquard, every 8 knitting needles are one group, and 72 road yarns are arranged, and the selecting mechanisms such as 72 cover slide cam selectors and triangle (cam) are namely arranged.What jacquard adopted is eight sections piezoelectric ceramic needle selecting machines, and its maximum operating frequency is 100HZ, is namely also the operating frequency of needle selecting knife, supposes that the syringe rotating speed is 15r/min, and namely per second 1/4 turns.As calculated, adopt the round latitude machine of needle selecting knife, the operating frequency that this slide cam selector highest frequency is converted to knitting needle is 24Hz.If adopt floated knitting needle of the present invention, due to the transmission mechanism in the middle of no longer including, and directly control the knitting needle motion by electromagnetic force, according to knitting as can be known, knitting needle is completed braid movement one time, the shortest time is 6ms, namely the needle motion frequency is 167Hz, and two compare, and the efficient of knitting needle of the present invention has improved more than 6 times, according to the theoretical and application of magnetic levitation technology, this efficient is feasible theoretically.
On the other hand, because the magnetic suspension knitting needle does not exist rigid shock and impact friction, under equivalent material, the life-span of knitting needle is certainly than traditional much longer times.
Claims (3)
1. magnetic suspension drives the knitting needle needle selecting device, comprises knitting needle, pin shell, permanent magnet, displacement transducer, electromagnetic actuator device and control system, and knitting needle is arranged in columnar pin shell, and the bottom of knitting needle is cylinder, and the head of knitting needle is rectangle; It is characterized in that: the inner oriented projecting inward knitting needle radial support face of described pin shell; Described permanent magnet is disc, and permanent magnet is arranged on the bottom of knitting needle and coaxial with knitting needle bottom; Described displacement transducer by moving pole piece and fixedly pole piece form, moving pole piece is plated on the outer surface in knitting needle stage casing, there are two embedded fixedly pole pieces the inboard in the middle part of the pin shell; The bottom of described pin shell is electromagnetic actuator device, and being arranged on control system on loom has wire to be connected with fixedly pole piece on electromagnetic actuator device and pin shell; The upper surface of electromagnetic actuator device is pasted with sheet rubber; Described moving pole piece with the fixing position relationship between pole piece is: at knitting needle bottom permanent magnet during with reset condition that electromagnetic actuator device upper surface sheet rubber contacts, first fixedly pole piece be positioned at moving pole piece top, second fixedly pole piece be positioned at first fixedly pole piece top, knitting needle can slide up and down in pin shell inside.
2. magnetic suspension as claimed in claim 1 drives the knitting needle needle selecting device, described displacement transducer is the differential capacitance displacement transducer, be comprised of fixedly pole piece and moving pole piece, fixedly pole piece and moving pole piece are cylindric concentric structure, and it is inboard that fixedly pole piece embeds pin shell middle part; It is characterized in that: the fixedly pole piece that embeds pin shell inboard is circular, circle ring inner surface is from the ceramic material substrate that radially is coated with successively circular ring type, argent coating, metal rhodium coating and the polyethylene coating in the export-oriented center of circle, axially go up, also have three equipotential ring coating with above-mentioned circular ring type coating isolation separately; Being plated in the moving pole piece on the outer surface of knitting needle stage casing, from external cylindrical surface to the center of circle radially, is metal rhodium coating, argent coating and the ceramic material substrate of circular ring type successively.
3. magnetic suspension drives the knitting needle method for selecting needle, it is characterized in that: be to adopt magnetic suspension method, drive the knitting needle electronic needle selecting device and risen to the method that returns the first station after the second station or the 3rd station by the first station, position when described the first station refers to that knitting needle bottom permanent magnet contacts with electromagnetic actuator device upper surface sheet rubber, described the second station refer in moving pole piece on knitting needle and pin shell first fixedly pole piece near the time the position, the second station is higher than the first station, described the 3rd station refer in moving pole piece on knitting needle and pin shell second fixedly pole piece near the time the position, the 3rd station is higher than the second station, control system by loom in work loads corresponding electric current to the electromagnetic actuator device in knitting-needle device, the magnetic field that produces after the electromagnetic actuator device energising and the magnetic field of permanent magnet bottom knitting needle are same polarity, the permanent magnet that repels the knitting needle bottom, promote knitting needle along the axial rising of pin shell, the displacement signal that the simultaneous displacement sensor detects knitting needle is sent to control system, control the second station or the 3rd station that knitting needle arrives appointment, and hover over the second station or the 3rd station after period, control system disconnects the electromagnetic actuator device power supply again, knitting needle is because of attraction between the iron core of bottom permanent magnet and electromagnetic actuator device and the effect of knitting needle self gravitation, the first station hurtles down, go round and begin again, regulate the drive current size of electromagnetic actuator device, can control knitting needle and hover over the second station or the 3rd station position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110098202 CN102242457B (en) | 2011-04-20 | 2011-04-20 | Method and device for selecting magnetic levitation driven needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110098202 CN102242457B (en) | 2011-04-20 | 2011-04-20 | Method and device for selecting magnetic levitation driven needle |
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| Publication Number | Publication Date |
|---|---|
| CN102242457A CN102242457A (en) | 2011-11-16 |
| CN102242457B true CN102242457B (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110098202 Expired - Fee Related CN102242457B (en) | 2011-04-20 | 2011-04-20 | Method and device for selecting magnetic levitation driven needle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254565A (en) * | 2020-01-21 | 2020-06-09 | 西安工程大学 | Straight needle selecting device of flat knitting machine based on micro-mover |
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| CN103451840B (en) * | 2013-08-30 | 2015-05-06 | 武汉纺织大学 | High-speed magnetic suspension type driving Jacquard knitting needle circular weft knitting machine |
| CN104727013B (en) * | 2015-02-27 | 2017-03-01 | 武汉纺织大学 | A kind of Electromagnetic Drive knitting needle needle selection device |
| CN105155116B (en) * | 2015-08-21 | 2017-01-25 | 武汉纺织大学 | Double-layered magnetic levitation device connection rod driven needle jacquard circle knitting machine |
| CN105297272B (en) * | 2015-09-10 | 2017-03-08 | 武汉纺织大学 | A kind of control method of adjustable multichannel yarn feeding computer flat-knitting machine head device |
| CN107043980A (en) * | 2017-03-22 | 2017-08-15 | 杭州天迈纺织电子科技有限公司 | Electromagnetic levitation type electronic jacquard needle selection driving plate |
| CN107700055B (en) * | 2017-10-24 | 2019-06-18 | 武汉纺织大学 | Electromagnetic levitation type directly drives knitting needle knitted jacquard circular knitting machine |
| CN108774801A (en) * | 2018-06-08 | 2018-11-09 | 章其娟 | A kind of Knitting Machinery braiding device |
| CN111648016B (en) * | 2020-04-30 | 2021-08-24 | 武汉纺织大学 | Hybrid magnetic suspension knitting needle driving device and control method thereof |
| CN112410991A (en) * | 2020-12-07 | 2021-02-26 | 烟台缇绮羊绒制品有限公司 | Electromagnetic looping controller of cotton sock machine |
| CN112877890B (en) * | 2021-01-07 | 2022-07-01 | 武汉纺织大学 | Tubular magnetic suspension knitting needle device and driving method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0717136A1 (en) * | 1994-12-14 | 1996-06-19 | Tsudakoma Kogyo Kabushiki Kaisha | Driving apparatus for needles of knitting machine |
| GB2337532A (en) * | 1998-05-22 | 1999-11-24 | Sipra Patent Beteiligung | Knitting needle with selection element |
-
2011
- 2011-04-20 CN CN 201110098202 patent/CN102242457B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0717136A1 (en) * | 1994-12-14 | 1996-06-19 | Tsudakoma Kogyo Kabushiki Kaisha | Driving apparatus for needles of knitting machine |
| GB2337532A (en) * | 1998-05-22 | 1999-11-24 | Sipra Patent Beteiligung | Knitting needle with selection element |
Non-Patent Citations (2)
| Title |
|---|
| 提高纬编织物生产速度的一种新理论——悬浮式驱动织针理论;罗有全;《针织工业》;19921027(第5期);第4-8页 * |
| 罗有全.提高纬编织物生产速度的一种新理论——悬浮式驱动织针理论.《针织工业》.1992,(第5期),第4-8页. |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111254565A (en) * | 2020-01-21 | 2020-06-09 | 西安工程大学 | Straight needle selecting device of flat knitting machine based on micro-mover |
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