US3839972A - Adjustable stroke mechanism for tufting machines - Google Patents

Adjustable stroke mechanism for tufting machines Download PDF

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Publication number
US3839972A
US3839972A US00356875A US35687573A US3839972A US 3839972 A US3839972 A US 3839972A US 00356875 A US00356875 A US 00356875A US 35687573 A US35687573 A US 35687573A US 3839972 A US3839972 A US 3839972A
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US
United States
Prior art keywords
shaft
tab
tufting machine
recited
tongues
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
US00356875A
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English (en)
Inventor
J Scott
R Smith
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.)
SPENCER WRIGHT INDUSTRIES Inc A CORP OF TENNESSEE
Singer Co
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Priority to US00356875A priority Critical patent/US3839972A/en
Priority to GB202874A priority patent/GB1431404A/en
Priority to JP846574A priority patent/JPS55496B2/ja
Priority to CA190,555A priority patent/CA988371A/en
Priority to IT20059/74A priority patent/IT1007596B/it
Priority to DE19742407457 priority patent/DE2407457B2/de
Priority to FR7405615A priority patent/FR2228128B1/fr
Priority to BE141242A priority patent/BE811406A/xx
Priority to NL7402516A priority patent/NL7402516A/xx
Priority to BR2467/74A priority patent/BR7402467D0/pt
Application granted granted Critical
Publication of US3839972A publication Critical patent/US3839972A/en
Assigned to SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESSEE reassignment SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESSEE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FIRST NATIONAL BANK OF BOSTON, THE A NATIONAL BANKING ASSOCIATION, FNB FINACIAL COMPANY A MASSACHUSETTS BUSINESS TRUST
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C15/00—Making pile fabrics or articles having similar surface features by inserting loops into a base material
    • D05C15/04—Tufting
    • D05C15/08—Tufting machines
    • D05C15/16—Arrangements or devices for manipulating threads
    • D05C15/20—Arrangements or devices, e.g. needles, for inserting loops; Driving mechanisms therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2173—Cranks and wrist pins
    • Y10T74/2179—Adjustable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2173—Cranks and wrist pins
    • Y10T74/2183—Counterbalanced

Definitions

  • ABSTRACT This disclosure relates to tufting machines and in particular an adjustable crankshaft for varying the needle [52] Cl 112/79 43 6 1 stroke in such machines which includes means for 51] I t Cl 20 changing the position of the connecting rod relative to [58] d A the crankshaft bearing blocks and the axis of the a gg 17 1 j crankshaft whereby the crank throw will be changed A 4 and thus the needle stroke.
  • An adjustable counterweight mechanism is also provided which may be ad- [56] References Cited justed in the same manner as the connecting rod but UNITED STATES PATENTS Knous 1/1900 Frost opposite thereto which results in a balanced crankshaft drive mechanism.
  • a tufting machine having a main drive shaft is constructed such that said main drive shaft is in the form of a crank shaft.
  • the crank shaft is provided with a number of crank portions whose axes are offset from the axis of the main shaft itself.
  • the connecting rods which drive the needle bar in its reciprocating motion are each connected to a crank portion so that the length of the stroke of the needle bar is controlled by the degree of offset of the axis of the crank portions.
  • the crank shaft is constructed such that the distance between the axis of the crank portions and the axis of the main shaft itself may be varied.
  • crank portions are readily moveable relative to the axis of the main shaft thus varying the distance of the throw of the crank portions.
  • the crankshaft is balanced by providing adjustable counterweights which are provided adjacent each crank portion and which are preferably adjustable in the same manner as the crank portion itself but in a direction opposite to the direction of offset of the crank portion.
  • the counterweights are selected to offset vibrational effects which may be present due to the offset rotation of the crank portion.
  • the crankshaft of the invention thus provides for a smooth running drive mechanism in a tufting machine and which is capable of providing a relatively wide range of needle strokes.
  • FIG. 1 illustrates a cross-sectional view of a tufting machine embodying the present invention
  • FIG. 2 illustrates an enlarged top plan view of a portion of one embodiment of the crankshaft of the invention taken in the direction of line 2 2 of FIG. 1.
  • FIG. 3 illustrates an enlarged front view of a portion of the crankshaft of FIG. 1 taken in the direction of line 3 3 of FIG. 1;
  • FIG. 4 illustrates an exploded perspective view of a portion of the embodiment of FIG. 1;
  • FIG. 5 is an enlarged top plan view of a portion of a second embodiment of the invention.
  • FIG. 6 is an enlarged front view of a portion of the second embodiment of the invention.
  • a tufting machine 10 is illustrated as having a head portion 12 and a bedplate portion 14. Included in the head portion 10 is a needle mechanism which comprises a needle bar 16 which supports a plurality of needles 18 for penetrating a base fabric F with yarns Y.
  • the needle bar 16 is connected to a push rod 20 which is driven in a reciprocating manner in a bushing 22 by a connecting rod 24 in a manner which will be more fully described hereinafter.
  • a looper mechanism is supported in the bedplate portion and includes a plurality'of loopers or hooks 26, one for each needle, operably supported on a hook shaft 28 which is driven in an oscillating motion in a well known manner.
  • the hooks 26 serve to pick up loops of yarn from the needles 18 on their downstroke and hold the loops during the return stroke of the needles.
  • a knife mechanism may be associated with each hook 26 for cutting the loops in order to make cut pile tufted fabrics and includes a plurality of knives 30 each operably supported on an oscillating knife shaft 32 which is suitably oscillated in timed relationship with the hooks to cut the loops.
  • Feed rolls 34, 36, 38 and 40 are provided for feeding the base fabric F across a needle plate 42 so that as the fabric is advanced through the machine a plurality of rows of loops or cut loops will be formed in the base fabric.
  • the mechanism thusfar described is conventional in tufting machines.
  • the main drive mechanism for the needle mechanism in tufting machines is generally provided in the head portion 12 and includes a main shaft 44. which is generally operably connected to a prime mover such as an electric motor (not shown).
  • a prime mover such as an electric motor (not shown).
  • mainshafts having eccentrics or cams have been used with connecting rods supported thereon so that as the main shaft rotates the connecting rods will impart a reciprocating motion to a push rod connected thereto.
  • the length of the stroke of the push rod, to which the needle bar is connected is dependent upon the amount of eccentricity of the cam. As the requirements for longer needle strokes become more desirable, say for example when tufting shag type or long nap fabrics, it becomes necessary to increase the size of the cams.
  • the main drive shaft 44 is generally in the form of a crank shaft comprising a plurality of stub shafts 46 journaled in bearing blocks 48 suitably fastened to a portion of the machine head 12 by bolts or the like as illustrated in FIG. 1.
  • each stub shaft 46 has a reduced end portion 50 on each end thereof in which is formed a slot or groove 52 to form a pair of spaced tab or tongue portions 54 and 56.
  • the tab portions 54 and 56 each have a plurality of holes 58 and 60, respectively, for receiving bolts 62 to which nuts 63 are fastened on the outside thereof in the usual manner.
  • the bolts 62 are preferably inserted from opposite sides, although the bolts could also be inserted from the same side.
  • each connecting rod 24 has a connecting rod bearing head portion 64 in which there is journaled a connecting rod bearing shaft or crank portion 66.
  • Each such shaft 66 has a reduced portion comprising a tongue or tab 68 on each end thereof in which there is drilled a hole 70 for receiving the bolts 62.
  • Each tab 68 is made to fit into a slot 62 in a stub shaft 46 and the holes therein will mate with holes 58 and 60 of the adjacent stub shafts 46 so that the bolts 62 will pass through bothelements 46 and 66 to fasten them together. It will be apparent from FIGS.
  • each connecting rod position is constructed for attachment and adjustment relative to the stub shaft 46 in the same manner as shaft 66.
  • a counterweight 72 which as illustrated in FIG. 2 is disposed for adjustment or positioning relative to the axis of the shafts 46 an equal amount but in an opposite direction to the adjustment or positioning of the shaft 66 in order to counterbalance the shaft 66.
  • the ends of the counterweights 72 are formed with a tab constructions 73 which is substantially the same as the similar construction on the shafts 66. For every change in position of a shaft 66 there will be an equal and opposite change in position of the counterweight 72 whereby the entire shaft will always be in balance and relatively free of vibration. This will permit operation at relatively long strokes and at high speeds which has heretofore not been readily possible.
  • each connecting rod 24 and shaft 66 construction is essentially the same as in the first embodiment.
  • the counterweight construction comprises a pair of counterweights 74 and 76 which are attached to the same tab element construction 54, 56 and slot 52 as the particular shaft 66 with which the counterweights are associated.
  • the counterweights are now disposed at a connecting rod position on the shaft instead of between adjacent connecting rod positions.
  • the counterweights 74 and 76 are connected to the tab elements by bolts 62 and nuts 63 and are adjustable relative to the connecting rod position to counterbalance the offset of the connecting rod from the center of the shaft axis. This construction permits a change in eccentricity and thus needle stroke to be made relatively rapidly at a single position for each connecting rod and counterweight.
  • the portions of the shaft between connecting rod positions can be of relatively simple construction.
  • the shaft portions 78 which extend between adjacent connecting rod positions are of substantially uniform diameter along their length and through the bearing blocks 48.
  • Their end portions 80 and 82 and groove 84 are constructed the same as that described in the first embodiment with relation to shaft 46, namely end portions 54 and 56, but there are only half as many such constructions since the adjustable counterweights have been removed from positions between adjacent connecting rod positions.
  • the construction of the second embodiment is relatively simple in construction and enables relatively simple and rapid adjustment.
  • a tufting machine having an adjustable stroke needle mechanism and means for initiating reciprocating motion of said needle mechanism including a connecting rod means operably connected to said needle mechanism, a drive shaft operably connected to a source of power for initiating rotary motion of said drive shaft, said drive shaft including a first shaft member for receiving thereon a connecting rod means, a plurality of second shaft members each being journaled in a bearing block in coaxial relationship, said first shaft member having its end portions disposed between facing end portions of adjacent second shaft members and having its axis offset relative to the axis of said second shaft members, interconnectable means fixed on the end portions of said first shaft member and on said facing end portions of said second shaft members, and means for adjustably securing the interconnectable means of said first shaft member to adjacent interconnectable means of said second shaft member facing end portions for adjusting the position of said first shaft member relative to its associated second shaft members such that the offset of the axis of said first shaft member can be radially changed relative to the axis of said second shaft members whereby for each change
  • a tufting machine as recited in claim 1 further comprising means for counterbalancing said drive shaft including counterweight means, and means for adjusting the position of said counterweight means to counterbalance the relative offset position of said first shaft member and its connecting rod means.
  • interconnectable means on one of said first and second shaft members comprises a pair of spaced tongues
  • interconnectable means on the other of said first and second shaft members comprises a tab receivable in the space between said tongues
  • said securing means comprises a plurality of spaced holes through said tongues, and at least one hole in said tab
  • bolt means extending through a selected hole in each pair of tongues and through the hole in the corresponding tab.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Knitting Machines (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
US00356875A 1973-05-03 1973-05-03 Adjustable stroke mechanism for tufting machines Expired - Lifetime US3839972A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US00356875A US3839972A (en) 1973-05-03 1973-05-03 Adjustable stroke mechanism for tufting machines
GB202874A GB1431404A (en) 1973-05-03 1974-01-16 Adjustable stroke mechanism in tufting machines
JP846574A JPS55496B2 (de) 1973-05-03 1974-01-18
CA190,555A CA988371A (en) 1973-05-03 1974-01-21 Adjustable stroke mechanism for tufting machines
IT20059/74A IT1007596B (it) 1973-05-03 1974-01-31 Meccanismo a corsa regolabile per per macchine per formare fiocchi
DE19742407457 DE2407457B2 (de) 1973-05-03 1974-02-16 Tuftingmaschine mit einstellbarem nadelstangenhub
FR7405615A FR2228128B1 (de) 1973-05-03 1974-02-19
BE141242A BE811406A (fr) 1973-05-03 1974-02-21 Machine a tufter
NL7402516A NL7402516A (de) 1973-05-03 1974-02-25
BR2467/74A BR7402467D0 (pt) 1973-05-03 1974-03-28 Maquina de tufar com mecanismo de curso ajustavel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00356875A US3839972A (en) 1973-05-03 1973-05-03 Adjustable stroke mechanism for tufting machines

Publications (1)

Publication Number Publication Date
US3839972A true US3839972A (en) 1974-10-08

Family

ID=23403332

Family Applications (1)

Application Number Title Priority Date Filing Date
US00356875A Expired - Lifetime US3839972A (en) 1973-05-03 1973-05-03 Adjustable stroke mechanism for tufting machines

Country Status (10)

Country Link
US (1) US3839972A (de)
JP (1) JPS55496B2 (de)
BE (1) BE811406A (de)
BR (1) BR7402467D0 (de)
CA (1) CA988371A (de)
DE (1) DE2407457B2 (de)
FR (1) FR2228128B1 (de)
GB (1) GB1431404A (de)
IT (1) IT1007596B (de)
NL (1) NL7402516A (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4388885A (en) * 1979-10-01 1983-06-21 Fritz Gegauf Aktiengesellschaft Bernina-Nahmaschinenfabrik Gap stitch mechanism for sewing machines
GB2125447A (en) * 1982-08-13 1984-03-07 Spencer Wright Ind Inc Tufting machines
US4515096A (en) * 1982-08-13 1985-05-07 Spencer Wright Industries, Inc. Tufting machines
US4669403A (en) * 1986-07-18 1987-06-02 Spencer Wright Industries, Inc. Drive for a tufting machine
GB2209543A (en) * 1987-09-08 1989-05-17 Spencer Wright Ind Inc Tufting machine having adjustable needle stroke
US5320053A (en) * 1991-09-30 1994-06-14 Tuftco Corp. Demountable rotary cam for tufting machine
WO1995034706A1 (en) * 1994-06-14 1995-12-21 G T Supplies & Engineering (Acc) Ltd. A tufting machine
US20040154504A1 (en) * 2003-02-06 2004-08-12 Paul Block Needle bar driver assembly for a sewing machine
US8997669B1 (en) 2014-10-16 2015-04-07 Handi Quilter, Inc. Thread tensioner for a sewing machine
US9394639B2 (en) 2014-10-16 2016-07-19 Handi Quilter, Inc. Motorized thread tensioner for a sewing machine
US9809912B2 (en) * 2014-10-16 2017-11-07 Handi Quilter, Inc. Vibration reduction mechanism for a sewing machine
CN112095243A (zh) * 2020-10-09 2020-12-18 威海寅虎自动化设备有限公司 一种减震式大轴安装两端偏心摆臂的调整连接结构
CN113481669A (zh) * 2021-07-12 2021-10-08 江苏三叶人造草坪有限公司 一种免填充人造草坪簇绒机
US20220325456A1 (en) * 2019-10-01 2022-10-13 Vi.Be.Mac. S.P.A. Handling system for sewing machines

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103981653B (zh) * 2014-05-30 2016-05-11 上海市纺织科学研究院 一种同轨双机簇绒地毯织机
CN104032499B (zh) * 2014-05-30 2016-05-11 上海市纺织科学研究院 可作圆周旋转的簇绒地毯机
CN104562491B (zh) * 2014-12-19 2016-07-06 义乌市新彩虹工艺地毯有限公司 全电脑伺服3d枪刺簇绒地毯机
CN105887377A (zh) * 2016-05-23 2016-08-24 浙江大达家居用品有限公司 一种簇绒机的勾绒刀
CN105780343A (zh) * 2016-05-23 2016-07-20 浙江大达家居用品有限公司 一种簇绒机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US363522A (en) * 1887-05-24 Crank for velocipedes
US641949A (en) * 1899-02-08 1900-01-23 William Frost Mechanical movement.
US1395113A (en) * 1919-09-23 1921-10-25 John W Hudson Crank-shaft
US1765927A (en) * 1928-07-23 1930-06-24 Union Special Maschinenfab Sewing machine and actuating mechanism therefor
US3665873A (en) * 1970-07-17 1972-05-30 Singer Co Adjustable stroke mechanism for tufting machines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR361657A (fr) * 1905-08-01 1906-09-22 Raoul Marcel Moteur à force variable
US1499474A (en) * 1923-06-15 1924-07-01 Ralph H Price Crank
BE350208A (de) * 1928-03-12
US2219080A (en) * 1936-01-06 1940-10-22 Falk Corp Counterweighted crank
CH329490A (de) * 1954-02-24 1958-04-30 Neukirch Johannes Exzentergetriebe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US363522A (en) * 1887-05-24 Crank for velocipedes
US641949A (en) * 1899-02-08 1900-01-23 William Frost Mechanical movement.
US1395113A (en) * 1919-09-23 1921-10-25 John W Hudson Crank-shaft
US1765927A (en) * 1928-07-23 1930-06-24 Union Special Maschinenfab Sewing machine and actuating mechanism therefor
US3665873A (en) * 1970-07-17 1972-05-30 Singer Co Adjustable stroke mechanism for tufting machines

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4388885A (en) * 1979-10-01 1983-06-21 Fritz Gegauf Aktiengesellschaft Bernina-Nahmaschinenfabrik Gap stitch mechanism for sewing machines
GB2125447A (en) * 1982-08-13 1984-03-07 Spencer Wright Ind Inc Tufting machines
US4515096A (en) * 1982-08-13 1985-05-07 Spencer Wright Industries, Inc. Tufting machines
US4669403A (en) * 1986-07-18 1987-06-02 Spencer Wright Industries, Inc. Drive for a tufting machine
GB2209543A (en) * 1987-09-08 1989-05-17 Spencer Wright Ind Inc Tufting machine having adjustable needle stroke
GB2209543B (en) * 1987-09-08 1992-02-19 Spencer Wright Ind Inc Improvements to tufting machines
US5320053A (en) * 1991-09-30 1994-06-14 Tuftco Corp. Demountable rotary cam for tufting machine
US5752457A (en) * 1994-06-14 1998-05-19 G.T. Supplies & Engineering (Acc) Ltd. Tufting machine having improved needle stroke adjustment
WO1995034706A1 (en) * 1994-06-14 1995-12-21 G T Supplies & Engineering (Acc) Ltd. A tufting machine
US20040154504A1 (en) * 2003-02-06 2004-08-12 Paul Block Needle bar driver assembly for a sewing machine
US8997669B1 (en) 2014-10-16 2015-04-07 Handi Quilter, Inc. Thread tensioner for a sewing machine
US9394639B2 (en) 2014-10-16 2016-07-19 Handi Quilter, Inc. Motorized thread tensioner for a sewing machine
US9809912B2 (en) * 2014-10-16 2017-11-07 Handi Quilter, Inc. Vibration reduction mechanism for a sewing machine
US20220325456A1 (en) * 2019-10-01 2022-10-13 Vi.Be.Mac. S.P.A. Handling system for sewing machines
CN112095243A (zh) * 2020-10-09 2020-12-18 威海寅虎自动化设备有限公司 一种减震式大轴安装两端偏心摆臂的调整连接结构
CN113481669A (zh) * 2021-07-12 2021-10-08 江苏三叶人造草坪有限公司 一种免填充人造草坪簇绒机

Also Published As

Publication number Publication date
GB1431404A (en) 1976-04-07
IT1007596B (it) 1976-10-30
FR2228128B1 (de) 1976-11-26
BE811406A (fr) 1974-06-17
BR7402467D0 (pt) 1974-12-24
JPS55496B2 (de) 1980-01-08
CA988371A (en) 1976-05-04
FR2228128A1 (de) 1974-11-29
DE2407457B2 (de) 1976-03-25
JPS507643A (de) 1975-01-27
DE2407457A1 (de) 1975-01-02
NL7402516A (de) 1974-11-05

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Legal Events

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AS Assignment

Owner name: SPENCER WRIGHT INDUSTRIES, INC., A CORP OF TENNESS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:FNB FINACIAL COMPANY A MASSACHUSETTS BUSINESS TRUST;FIRST NATIONAL BANK OF BOSTON, THE A NATIONAL BANKING ASSOCIATION;REEL/FRAME:004248/0926

Effective date: 19840209