EP1354087B1 - Circular knitting machine - Google Patents

Circular knitting machine Download PDF

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Publication number
EP1354087B1
EP1354087B1 EP01272603A EP01272603A EP1354087B1 EP 1354087 B1 EP1354087 B1 EP 1354087B1 EP 01272603 A EP01272603 A EP 01272603A EP 01272603 A EP01272603 A EP 01272603A EP 1354087 B1 EP1354087 B1 EP 1354087B1
Authority
EP
European Patent Office
Prior art keywords
carrier
bearing
needle cylinder
machine
knitting machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01272603A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1354087A1 (en
Inventor
Frantisek Piskula
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amtek Spol SRO
Original Assignee
Amtek Spol SRO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amtek Spol SRO filed Critical Amtek Spol SRO
Publication of EP1354087A1 publication Critical patent/EP1354087A1/en
Application granted granted Critical
Publication of EP1354087B1 publication Critical patent/EP1354087B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind

Definitions

  • the invention relates to a circular knitting machine with a basically vertical axis with a needle cylinder arranged on a carrier of the needle cylinder with coaxially arranged gear of the drive of the carrier of the needle cylinder and with a bearing body arranged on a machine bed surrounding the needle cylinder carrier in which the bearing body comprises four in pairs mutually opposite situated bearing races, two of which are situated on the needle cylinder carrier, and the other two, on the bearing body, with bearing balls situated between the bearing races, and with a part of the bearing races mounted radially and/or axially displaceably in relation to the machine bed and/or to the needle cylinder carrier, whereas both outer or inner bearing races are mounted in a bearing ring, which is limitedly displaceable in radial direction in relation to the machine bed and/or to the needle cylinder carrier and the bearing ring is a part of the bearing body, which is situated above the gear of the carrier of the needle cylinder.
  • Knitting machines of this kind are known for instance from the patent DE 2829678 where one of the bearing races is mounted, and adapted axially to move, on a radially arranged flexible flange.
  • two axially adjacent bearing races are elastically seated, each of them on a separate radially or axially arranged flexible flange so as to permit the bearing races to move axially or radially.
  • the invention intends to remove or at least to minimize the drawbacks of the background art.
  • This arrangement provides for the positioning of the bearing on an easily accessible place and for its easy exchangeability.
  • the radially movable seating also permits free thermal expansion of the outer bearing races and of the whole bearing body with all the positive effects.
  • the bearing is seated at the most rigid and most stable part of the machine bed and its seating is therefore very accurate and stable.
  • Use of radially guiding means allows the bearing body expand freely, responsive to its temperature increase, without the need of additional forces to flex an elastic thermal expansion compensator. This substantially eliminates the radial forces between the needle bed and the bearing body and prevents irregular deformation of needle cylinder.
  • Another advantage of the invention consists in the possibility of arranging the bearing body so as to reduce heat transfer into the machine bed.
  • the preload of the bearing and due to this also the heat generated by rolling-contact forces in the bearing increases and thus heats the outer bearing body which expands in response to increased temperature and thus reduces the preload of the bearing.
  • the outer bearing body automatically keeps the preload of the bearing and compensates the thermal expansion of the needle cylinder carrier.
  • the substantial principle of the invention is based on thermal effects, allowing the bearing to expand freely and identically with the needle cylinder carrier expansion due to equalization of temperature and preventing the additional forces in the bearing to occur, which differentiates it very substantially from the known principles, where the thermal compensation is based on mechanical principle and flexing of flanges by additional forces.
  • the bearing body has a pair of inner bearing races arranged in the inner bearing ring and is situated above the gear of the needle cylinder carrier drive.
  • the bearing ring is to a limited extent movable in a radial direction in relation to the needle cylinder carrier, whereas the bearing body is positioned on the needle cylinder carrier by radially guiding means.
  • Fig. 1 is a cross section through the machine bed with the needle cylinder carrier with the bearing, through the needle cam box carrier, needle cylinder and needle cam boxes, with the bearing body with radially arranged flange with guide grooves on its circumference
  • Fig. 2 is a view from above of a guide member consisting of a pin and a cube with a circular aperture
  • Fig. 3a shows guide member adjustable by an eccentric
  • Fig. 3b is a detail of a horizontal section through a guide member of the Fig. 3a .
  • the circular knitting machine comprises a needle cylinder 1 carrying knitting means and fixed on a carrier 2 of the needle cylinder 1 .
  • Coaxially arranged on the carrier 2 is a gear 5 of the carrier 2 of the needle cylinder 1 and a bearing body 6 arranged on a machine bed 7 surrounding the carrier 2 of the needle cylinder 1 with four mutually opposite positioned bearing races 8a , 8b , 9a , and 9b , out of which those designed with 8a and 8b are inner bearing races whereas the other two, designed with 9a and 9b , are outer bearing races.
  • the inner bearing races 8a and 8b are situated on the carrier 2 of the needle cylinder 1
  • the outer bearing races 9a and 9b are situated on the bearing body 6 .
  • bearing balls 6a are inserted
  • the outer bearing races 9a and 9b are seated radially movable in relation to the bed 7 in a bearing ring 16 on the bearing body 6 situated above the gear 5 of the drive of the carrier 2 of the needle cylinder 1 .
  • the bearing body 6 carrying in the bearing ring 16 the outer bearing races 9a and 9b is thermally expandably positioned in the machine bed 7 by radially guiding means in a radially movable way.
  • the radially guiding means consist of grooves 12 provided on the circumference of the flange 17 of the bearing body 6 and cooperating with guide members inserted in them such as exactly mating cubes 3 arranged on pins 14 pressed in parallel with the machine axis in the contact surface of the bed 7 of the machine for the machine flange 17 .
  • the flange 17 is free to move radially in relation to the bed 7 of the knitting machine.
  • the guide grooves 12 and the cubes 13 are so arranged that they have in the radial direction the play required for the relative motion of the bearing body 6 and of the needle cylinder 1 while their play in the tangential direction is a minimal one as required for exact guiding.
  • the bearing body 6 can radially expand while maintaining exact coaxial position with a carrier 3 of needle cam boxes of the needle cylinder 1 with the needle cam system 4 .
  • the axial position of the carrier 3 of needle cam boxes is adjusted by a nut 11 for the central adjustment of the stitch length which is on its inner side fitted with a thread 11a , and on its outer side with a gearing 11b into which a not represented pinion serving to adjust the stitch length enters.
  • the nut 11 preferably leans against the upper surface of the flange 17 of the bearing body 6 and so achieves a more exact parallelism of the axes of the carrier 3 of needle cam boxes and of the carrier 2 of the needle cylinder 1 .
  • Fig. 2 is a view from above on the guide means consisting of the groove 12 on the circumference of the flange 17 with the inserted cube 13 on the pin 14 .
  • the exact position of each cube 13 on the bed 7 can be obtained for instance by flushed boring and pinning after the adjustment of the position of the carrier 2 of the needle cylinder 1 .
  • Another preferred embodiment of the guide means in which the flushing boring is not necessary is shown in Figs. 3a, 3b .
  • the pin 14 carries an eccentric 15 on which the cube 13 is set.
  • Fig. 3b shows the cross section through the embodiment of Fig. 3a .
  • the tangential play can be adjusted to an extent sufficient to do away with the need for flushing boring of the cube 13 with the machine bed 7 .
  • the play is preferably adjusted by means of the eccentric 15 in the neighbouring grooves 12 alternately on the remote side of the grooves 12 in such a manner that the bearing body 6 is free radially to expand but locked against the shifting and tangential rotary displacements.
  • the eccentrics 15 can conveniently adjust also the position of the bearing body 6 in relation to the bed 7 of the knitting machine.
  • the flange 17 leans against the machine bed 7 only in the area of the recess 17a .
  • the radial expansion of the inner bearing races 8a , 8b is practically the same as that of the bearing ring 16 with the outer bearing races 9a , 9b , and the bearing shows no increased load in heated machine.
  • An analogical mutual relation exists in the thermal expansion of the nut 11 and the bearing body 6 so that the nut 11 then can be led more exactly by the guide recess 11c which improves the precision of the stitch length setting.
  • an integral part of the carrier 2 of the needle bed 1 is made as radially elastic compensation member, preferably U-shaped.
  • This compensation member has flexible arms 20 and a connecting annulus 21 .
  • the elasticity of the compensation member limits both radial and torsional thermal deformations of the carrier 2 of the needle cylinder 1 .
  • the bearing can be so arranged that the bearing body, situated above the gear of the needle cylinder carrier, has a pair of inner bearing races situated in a bearing ring and that the bearing ring is to a limited extent radially movable.
  • the bearing body is mounted on the needle cylinder carrier by means of a member with reduced heat transfer capability so as to limit the heat transfer from the needle cylinder carrier into the bearing ring and into the machine bed.
  • the bearing body also comprises a flange extending in a generally horizontal direction from inner bearing ring towards machine axis, fitted on its inner circumference with grooves into which guide members mounted on the needle cylinder carrier enter.
  • the guide members are made equivalently to those of the shown embodiment.
  • the radial flange of the bearing body is equipped with a recess by means of which it is mounted on the needle cylinder carrier.
  • the contact surface between the needle cylinder carrier and the recess of the radial flange of the bearing body is shaped as an annulus, and a gap exists between the remaining surface of the radial flange and the needle cylinder carrier.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Rolling Contact Bearings (AREA)
EP01272603A 2000-12-29 2001-12-19 Circular knitting machine Expired - Lifetime EP1354087B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CZ20004932A CZ291398B6 (cs) 2000-12-29 2000-12-29 Okrouhlý pletací stroj
CZ20004392 2000-12-29
PCT/CZ2001/000077 WO2002053816A1 (en) 2000-12-29 2001-12-19 Circular knitting machine

Publications (2)

Publication Number Publication Date
EP1354087A1 EP1354087A1 (en) 2003-10-22
EP1354087B1 true EP1354087B1 (en) 2008-03-05

Family

ID=29222970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01272603A Expired - Lifetime EP1354087B1 (en) 2000-12-29 2001-12-19 Circular knitting machine

Country Status (8)

Country Link
EP (1) EP1354087B1 (cs)
CN (1) CN1555439A (cs)
AU (1) AU2002215820A1 (cs)
CZ (1) CZ291398B6 (cs)
DE (1) DE60133131T2 (cs)
ES (1) ES2302715T3 (cs)
TW (1) TW575704B (cs)
WO (1) WO2002053816A1 (cs)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ295462B6 (cs) * 2003-10-16 2005-08-17 Amtek, Spol. S R.O. Dvoulůžkový okrouhlý pletací stroj
CN100432313C (zh) * 2003-10-20 2008-11-12 大渝机械（厦门）有限公司 圆编织机的鞍座调整固定装置
EP2224047B1 (de) * 2009-02-26 2012-10-31 Groz-Beckert KG Strickmaschine mit Strickkopf
DE102012104976B4 (de) * 2012-06-08 2015-11-05 Memminger-Iro Gmbh Fadenliefergerät
CZ304261B6 (cs) * 2012-09-03 2014-02-05 Zdeněk Kratochvíl Způsob a zařízení pro výrobu bioetanolu z lignocelulózových a neligninových celulózových materiálů
SG10201707225UA (en) 2016-09-23 2018-04-27 Sulzer Management Ag Centrifugal pump for conveying a fluid
CN106435985B (zh) * 2016-10-19 2018-05-01 四川省丝绸科学研究院 针织圆纬机绕轴心运转结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829678C2 (de) * 1978-07-06 1981-12-10 Terrot Strickmaschinen GmbH, 7000 Stuttgart Rundstrickmaschine
DE3906773C2 (de) * 1989-03-03 1997-08-14 Terrot Strickmaschinen Gmbh Rundstrickmaschine
US5134863A (en) * 1991-05-10 1992-08-04 Mayer Industries, Inc. Circular sliver knitting machine having increased carding capacity
JPH07109646A (ja) * 1993-10-12 1995-04-25 Fukuhara Seiki Seisakusho:Kk 丸編機のシリンダー基筒部におけるベアリング装置

Also Published As

Publication number Publication date
ES2302715T3 (es) 2008-08-01
AU2002215820A1 (en) 2002-07-16
DE60133131D1 (de) 2008-04-17
WO2002053816B1 (en) 2002-09-19
EP1354087A1 (en) 2003-10-22
CN1555439A (zh) 2004-12-15
WO2002053816A1 (en) 2002-07-11
WO2002053816A8 (en) 2003-04-17
TW575704B (en) 2004-02-11
CZ291398B6 (cs) 2003-02-12
DE60133131T2 (de) 2009-03-26

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