US3835716A - Crank-driven reciprocating mechanisms - Google Patents

Crank-driven reciprocating mechanisms Download PDF

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Publication number
US3835716A
US3835716A US00190889A US19088971A US3835716A US 3835716 A US3835716 A US 3835716A US 00190889 A US00190889 A US 00190889A US 19088971 A US19088971 A US 19088971A US 3835716 A US3835716 A US 3835716A
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United States
Prior art keywords
connecting rod
shackle
reciprocable
crank
crank device
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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
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US00190889A
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English (en)
Inventor
L Ballamy
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.)
TUFTING OPPORTUNITIES NV A CORP OF NETHERLANDD ANTILLES
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Individual
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Publication of US3835716A publication Critical patent/US3835716A/en
Assigned to TUFTING OPPORTUNITIES NV, A CORP. OF NETHERLANDD ANTILLES reassignment TUFTING OPPORTUNITIES NV, A CORP. OF NETHERLANDD ANTILLES ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BELLAMY, LESLIE M.
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
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/14—Work-feeding means with rotary circular feed members rotating discontinuously
    • 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
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18176—Crank, pitman, lever, and slide

Definitions

  • crank driven reciprocating mechanism comprising a 0m. 23, 1970 Great Britain 50460/70 driven crank device, a Connecting rod articulated t0 the eccentric crank of the crank device and carrying a 52 US. Cl. 74/40, 112/212 shackle p and a shackle disposed transversely of the 51 Int. c1.
  • Fl6h 21/32 red articulated to a fixeble member on one side of the [58] Field of Sear h 1 12/221, 209, 210; 74/40 rod and on the other side of the rod to a reciprocable 74/41 member and having between its ends a longitudinal slot engaged by the shackle pin.
  • This mechanism can [56] Refere Cit d be used as the needle bar drive and if desired to drive UNITED STATES PATENTS the fabric feed mechanism of a stitching machine such 1,567,172 12 1925 Powell 74 40 as a tuftmg machine or a Sewmg machme 2,082,336 6/1937 Havener 74/40 16 Claims, 3 Drawing Figures PAIENIED SEP I 7 m4 SHEET 3 0F 3 1 CRANK-DRIVEN RECIPROCATING MECHANISMS BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to crank driven reciprocating mechanisms and inter alia is suitable.
  • the mechanism of the invention may however be used in any drive where it is desirable to impart a reciprocating movement of a member from a rotary drive member.
  • the main object of the present invention is to provide a crank driven reciprocating mechanism drive which may permit variation of the stroke of the member reciprocated by the drive and/or stopping and, starting the movement of the reciprocating member independently of its rotary drive element and/or permitting variations in an oscillating motion imparted to a member from a rotary drive element.
  • the invention will be described by way of example with reference to a tufting machine 2.
  • tufting machines suitable for operation in the home or by operatives in a factory have a frame formed with a flat elongated base having at one end a base cloth feeding mechanism and a looping and cut off device, an upright at the other end of the base and a needle mechanism supported over the feeding and looping and cut off mechanisms in a cantilever arm extending from the upper end of the upright in the form generally associated with conventional. domestic sewing machines.
  • the said mechanisms are driven by a driving mechanism which may be hand operated or driven by a prime mover such as an electric motor as in sewing machines.
  • the driven shaft through gears or belt drives incorporating speed reduction means drives two shafts, one in the base driving the feed and looping and cut off mechanisms and the other in the cantilever arm driving the needle mechanism, all the mechanisms being driven in timed relation and at speeds ensuring the needle, feed, looper and cutter all operating in accurate timed relation.
  • Such tufting machines have a reciprocating needle bar driven from the rotary shaft in the centilever arm and reciprocating through a throat plate in the base of the frame to carry yarn downwardly through an aperture therein.
  • the looper, and cutter are mounted below the throat plate and the base fabric to receive a tufted pile is fedover the throat plate by the feeder which holds the fabric stationary during the needle movement therethrough, moving fabric on intermittently during movements of the reciprocating needle above the fabric.
  • the looper cooperates with the needle to collect the loops of yarn passed by the needle through the fabric and throat plate and the cutter cooperates with the looper to cut the yarn threads looped over the looper to form tufts on the fabric.
  • a crank driven reciprocating mechanism comprises a driven crank device, a connecting rod articulated to the eccentric crank of the crank device and carrying a shackle pin,
  • a shackle disposed transversely of the rod articulated to a fixable member on one side of the rod and on the other side of the rod to a reciprocatable member and having between its ends a longitudinal slot engaged by the shackle pin.
  • a lever may be pivoted with respect to the fixable member and has a link articulated thereto carrying a link pin engaging in a longitudinal slot in the connecting rod for relative movement betweenrod and link pin such that by pivoting the lever the position of the link pin in the slot may be varied to vary the amplitude of oscillation of the reciprocable member.
  • the fixable member is preferably mounted on the rod connected to a piston in a fluid controlled cylinder and- /or the reciprocable member is connected to a piston in a fluid controlled cylinder and a fluid control valve is provided to move the piston or one of the pistons to enable the reciprocable member to be stopped or started instantaneously without stopping rotation of the crank device.
  • the connecting rod may be provided with a slot and a pivoted arm is mounted on an oscillated member and having a slot at an angle to the slot in the connecting rod, and a pin rides in both slots whereby rocking of the connecting rod by the crank device causes oscillation of the arm.
  • a needle bar drive mechanism is provided, the needle bar forming the reciprocable member of the invention and the crank drive mechanism of the invention is the drive for the needlebar.
  • the oscillatable arm of one preferred crank driven mechanism of the invention may be fixed to a feed mechanism assembly of the tufting machine.
  • the invention also provides a tufting machine having a reciprocating needlebar and an oscillatable feed mechanism driven by the preferred crank drive mechanism of the invention, or a sewing machine driven by such mechanism.
  • FIG. 1 is a longitudinal cross section through a tufting machine
  • FIG. 2 is an end elevation of the machine of FIG. 1 with the end covers removed looking from the left in FIG. 1, and
  • FIG. 3 is a perspective view on an enlarged scale of the tufting mechanism in the machine of FIGS. 1 and 2.
  • the machine frame comprises a base 1, a looper and cutter assembly (FIG. 3) mounted at one end of the base, an upright 2 at the other end of the base supporting a cantilever arm 3 which extends over and substantially parallel to the base and supports a needle mechanism at its outer endv over the looper and cutter assembly in the general manner of a domestic sewing machine.
  • the looper and cutter assembly is driven by a shaft 4 journalled in the base and the needle mechanism is driven by a shaft 5 journalled in the cantilever arm, the two shafts 4, 5 being driven by an electric motor mounted on the frame (not shown) through a belt drive 7 through appropriate timed pulleys and/or gears.
  • the looper and cutter assembly is supported by a body 8 and will now be described to assist in understanding the invention but it forms no part of the present invention.
  • a bore 9 extends through the body about a transverse axis offset forwardly from'the centre of the body and is lined to provide a bearing for the drive shaft 4.
  • the body is extended downwardly at one end thereof (hereinafter referred to as the outer end) in a projection 11 terminating in a pair of longitudinally spaced arcuate jaws defining a transversely extending threaded cylindrical bore 12. These jaws are joined at their lower ends by a bolt 15 extending longitudinally through a plain bore in the forward jaw to be threadably received in a threaded bore in the rearward jaw.
  • the body also is extended rearwardly at its outer end in a second projection 14 through which a plain bore extends about a transverse axis.
  • An axle 16 extends from the outer end of bore to constitute a pivotal mounting for a cutter assembly.
  • This cutter assembly comprises a tubular sleeve 17 having a planar cutter shaft 18 extending radially from the outer end thereof and an operating arm 19 extending radially from the other (i.e., inner) end I thereof.
  • the operating arm 19 is angularly spaced from the cutter shaft.
  • the cutter shaft is formed at its radially outer end in a rectangular block 20 which has its elongate axis coplanar with but inclined slightly from that of the shaft 18 and carries at its upper end a hardened cutting edge 21.
  • a parallel-sided slot 22 extends through the block 20 in the direction of the elongate axis of that block for a purpose hereinafter described.
  • the operating arm 19 is formed at its radially outer end with a yoke constituted by a pair of arms spaced parallel in a radial plane of the sleeve 17.
  • the tubular sleeve is a sliding and rotatable fit about the axle l6 and is located thereon with the operating arm 19 adjacent the body.
  • the drive shaft 4 has at its outer end a rotary eccentric 23 having a block 24 pivotally mounted on an offset pivot pin extending axially therefrom.
  • This block is a sliding fit in the yoke of the operating arm and is retained therein by abutment of a pair of flanges formed at the outer end of the block with the outer faces of the yoke arms.
  • a looper axle 25 formed at one end with a threaded portion of increased diameter is threadably received from that end in the bore 12 and is clamped therein by the bolt 9 drawing the arcuate arms of projection 11 together.
  • a looper assembly is carried on the axle 25 and comprises a tubular sleeve 28 having a planar looper shaft 29 extending radially from the centre thereof.
  • the shaft 29 carries a looper head 30 formed of a planar substantially triangular base portion having an end of one edge thereof extended outwardly in an arcuate looper hook 31, the free end of which extends forwardly in spaced parallel relationship to the remainder of the said edge.
  • the head 30 is attached to the shaft 29, in a radial plane of the sleeve 28 by a screw 32 passing through a hole in the apex of the base portion remote from the looper hook and threadably received in a cooperating threaded bore in the shaft 29.
  • the looper head is maintained by screw 32 with the looper hook radially outermost and extending substantially perpendicularly to the radial direction.
  • a slot 33 extends through a base portion of the looper head immediately below the base of the looper hook to provide access to a threaded bore in the radially outer end of the looper shaft. This slot 33 enables limited arcuate adjustment of the position of the looper head on the looper shaft whilst still providing for access to the threaded bore.
  • the tubular sleeve is slidably received about the intermediate portion of looper axle 25 with the looper head outermost and is spaced from the inner shoulder thereof by a spacer 34.
  • a second spacer 35 abuts the outer end of the sleeve and a compression spring 36 is disposed about the axle 25 to act between spacer 35 and a nut 37 threadably received on the threaded outer end of the axle 25.
  • a pin 38 formed at one end with an externally threaded portion of reduced diameter and at the other end with a slotted head of increased diameter extends through the slot 22 in the cutter assembly and through the slot 33 in the looper assembly and is threadably received in the radially outer bore of the looper shaft 29 so that the shoulder of the pin abuts the outer surface of the looper head 30.
  • a block 39 flanged at its outer end to prevent passage through the slot and having a bore extending transversely therethrough is a sliding fit about the pin 38 and is urged into the slot 22, with its flanged end in abutment with the outer face of the block 20 by a compression spring 40 acting between the flanged outer end of the block and the head of the pin 38.
  • the adjustment of the looper shaft does not affect the pressure of wiping engagement which is predetermined by the strength of spring 40.
  • the feed mechanism comprises a cam and roller freewheel assembly in a cylindrical casing 41 the inner end of the casing 41 being keyed to a driven shaft 42 fast on the needle bar casing 43.
  • the outer element of the freewheel assembly has a pair of pulleys 44 rotatable therewith on either side of the casing 41 and the cam and roller assembly is such that the pulleys can only be driven in a clockwise direction in FIG. 2.
  • the shaft 42 is driven from the shaft 5.
  • the shaft 5 has a rotary crank member 45 (which may be an eccentric) keyed thereto the crankpin 46 of which is articulated to a connecting rod 48 whose lower end is connected to a slotted element having a slot 49.
  • This rod-slotted element has a pin 50 fixed to it and this rides in a slot 51 in a shackle 52 pivoted at one end to the needle bar 53 and at its other on a pin 54 on a rod 55, to be described.
  • a lever 56 is pivoted on the shaft 42 and has a slot 57 in which the pin 70 moves, the lever 56 being out of alignment with the rod 48.
  • the feed drive mechanism has an arm 58 urged upwardly by a spring 59 connected to the arm and a projection 60 on the casing 43.
  • a rod 61 is disposed between the arm 58 and a nose 62 on a hand operated lever 63 pivoted at 64 to the casing 43.
  • Rotation of the crank member 45 oscillates the pivots of the shackle 52 about the pin 54 and thus reciprocates the needle bar 53 vertically in its guides in the casing 43, and the stroke of the needle bar can be varied by raising or lowering a stitch control lever 66 pivoted at 67 to the rod 55 and at 68 to a link 69 extending downwardly and carrying a .pin 70 riding in the two slots 49, 57.
  • the link 67 is telescopic in length and so arranged that when the needle bar is held, for example at the top of its stroke, the pivotal connection 71 of the shackle to the needle bar becomes the fulcrum upon which the shackle hinges and the pin 50 will oscillate in its telescopic link.
  • the needle bar may be stopped and started instantaneously without interfering with the rotation of the shaft 5.
  • Any known means may be employed to effect the change over such as mechanical interlock, fluid actuated rams or solenoids.
  • the pivot 67 is carried on a rod 73 which extends into a cylinder 74 in the casing 43 and has a piston 75 mounted on it.
  • the upper end of the needle bar enters another cylinder 76 and has a piston 77 mounted on it.
  • Operating fluid under pressure is admitted to and escapes from the cylinder 74, 76 through ports 78, 79 respectively under control of valves shown diagrammatically at 80.
  • a crank driven reciprocating mechanism comprising a driven crank device, mounted in a frame, a connecting rod articulated to the eccentric crank of said crank device, a shackle pin carried by said connecting rod, a member fixable with respect to said frame, a
  • a mechanism according to claim 1 wherein means are provided to adjust the position of said articulated connection of said shackle to said reciprocable member to vary the stroke of the latter without stopping rotation of said crank device.
  • a mechanism according to claim 1 wherein a lever is pivoted with respect to said fixable member, a link is articulated to said lever, a longitudinal slot in said connecting rod, and a link pin carried by said link engaging in said connecting rod slot permitting relative movement between said rod and said link such that pivotal movement of said lever varies the position of said link pin in said connecting rod slot and the amplitude of oscillation of said reciprocable member.
  • a mechanism according to claim 1 wherein said fixable member is mounted on a rod connected to a piston in a fluid controlled cylinder and a fluid control valve is provided, said valve controlling pressure fluid flow to said cylinder to move said fixable member and permit said reciprocable member to be stopped without stopping rotation of said crank device.
  • a mechanism according to claim I wherein said reciprocable member is connected to a piston in a fluid controlled cylinder and a fluid control valve is provided, said valve controlling pressure fluid flow to said cylinder to permit said reciprocable member to be stopped without stopping rotation of said crank device.
  • a mechanism according to claim 1 wherein a slot is provided in said connecting rod, an oscillable member is mounted in said frame, a pivoted arm is mounted on said oscillatable member and has a longitudinal slot therein, said arm slot being at an angle to said slot in said connecting rod, and a pin rides in both said slots whereby rocking of said connecting rod by said crank device causes oscillation of said arm.
  • a needle bar drive mechanism for a stitching machine comprising a driven crank device rotatably mounted in said machine frame, a connecting rod articulated to the eccentric crank of said crank device, a shackle pin carried by said connecting rod, a member fixable with respect to said frame, a shackle disposed transversely of said connecting rod and articulated to said fixable member on one side of said rod, said shackle on the other side of said rod being articulated to a needle bar reciprocable in said frame, and a longitudinal slot in said shackle engaged by said shackle pin whereby rotation of said crank device imparts a reciprocatory motion to said needle bar.
  • a mechanism according to claim 8 wherein a lever is pivoted in said frame with respect to said fixable member, a link is articulated to said lever, a longitudinal slot is provided in said connecting rod, and av link pin carried by said lever engages in said connecting rod slot and permits relative movement between said rod and said link such that pivotal movement of said lever varies the position of said link pin in said connecting rod slot and the amplitude of oscillation of said needle bar.
  • a mechanism according to claim 8 wherein a slot is provided in said connecting rod, an oscillatable fabric feed mechanism is mounted in said frame to cooperate with a reciprocatable needle clamped to said needlebar, a pivoted arm is mounted on said feed mechanism and has a longitudinal slot therein, said arm slot being at an angle to said slot in said connecting rod, and a pin rides in both said slots whereby rocking of said connecting rod by said crank device causes oscillation of said feed mechanism in timed relation to the reciprocable movement of said needlebar.
  • a stitching machine comprising a frame having a base supporting a stitching mechanism and a throat plate above said mechanism an upright support on said base remote from said mechanism, a cantilever arm mounted on said upright support spaced above and over said base, a needle bar drive mounted in said cantilever arm with a reciprocable needle bar in alignment with and passing a needle head thereon, in and out of the throat in said throat plate, a fabric feed mechanism supported adjacent said needle bar and said throat plate above the latter, and a crank drive mechanism driving said needle bar and feed mechanism, said crank drive mechanism comprising a driven crank device rotatably mounted in said machine frame, a connecting rod articulated to the eccentric crank of said crank device, a shackle pin carried by said connecting rod, a member fixable with respect to said frame, a shackle disposed transversely of said connecting rod and articulated to said fixable member on one side of said rod, said shackle on the other side of said rod being articulated to a needle-bar reciprocable in said frame, and a longitudinal slot in
  • a first reciprocable member disposed to one side of the axis of said drive shaft

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00190889A 1970-10-23 1971-10-20 Crank-driven reciprocating mechanisms Expired - Lifetime US3835716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5046070A GB1374759A (en) 1970-10-23 1970-10-23 Crankdriven reciprocating mechanisms

Publications (1)

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US3835716A true US3835716A (en) 1974-09-17

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US00190889A Expired - Lifetime US3835716A (en) 1970-10-23 1971-10-20 Crank-driven reciprocating mechanisms

Country Status (9)

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US (1) US3835716A (it)
BE (1) BE774356A (it)
DE (1) DE2153521A1 (it)
ES (1) ES396277A1 (it)
FR (1) FR2113107A5 (it)
GB (1) GB1374759A (it)
IE (1) IE35759B1 (it)
IT (1) IT942736B (it)
ZA (1) ZA717039B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4569297A (en) * 1983-07-07 1986-02-11 Pfaff Industriemaschinen Gmbh Needle bar detachable drive and stroke adjusting mechanism
US5249540A (en) * 1990-07-30 1993-10-05 Durkopp Adler Aktiengesellschaft Sewing-material transport device for single-needle or multi-needle sewing machine
US5383418A (en) * 1984-01-16 1995-01-24 Joseph Galkin Corporation Top feed system with toothed belt and clutch
US20040154508A1 (en) * 2003-01-29 2004-08-12 Paul Block Top feed belt apparatus for a sewing machine
US20080264317A1 (en) * 2007-04-25 2008-10-30 L&P Property Management Company Soft Goods Slitter and Feed System for Quilting
US20080264222A1 (en) * 2007-04-25 2008-10-30 L&P Property Management Company Soft Goods Slitter and Feed System for Quilting

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219604A (en) * 1988-06-08 1989-12-13 Oemec Taiwan Corp Crease eliminating device
DE29809192U1 (de) 1998-05-20 1998-07-23 KSL Keilmann Sondermaschinenbau GmbH, 64653 Lorsch Nähmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1567172A (en) * 1921-09-12 1925-12-29 A L Powell Power Co Inc Internal-combustion engine
US2082336A (en) * 1935-02-26 1937-06-01 Judson L Thomson Mfg Company Mechanism for transmitting motion
US2548807A (en) * 1947-06-21 1951-04-10 Worcester Found Ex Biology Pneumatic type pulsator
US3410145A (en) * 1965-09-07 1968-11-12 Wacker Hermann Manually guided motor driven working device
US3450081A (en) * 1968-03-05 1969-06-17 Jacob Rabinow Safety needle device for sewing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1567172A (en) * 1921-09-12 1925-12-29 A L Powell Power Co Inc Internal-combustion engine
US2082336A (en) * 1935-02-26 1937-06-01 Judson L Thomson Mfg Company Mechanism for transmitting motion
US2548807A (en) * 1947-06-21 1951-04-10 Worcester Found Ex Biology Pneumatic type pulsator
US3410145A (en) * 1965-09-07 1968-11-12 Wacker Hermann Manually guided motor driven working device
US3450081A (en) * 1968-03-05 1969-06-17 Jacob Rabinow Safety needle device for sewing machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4569297A (en) * 1983-07-07 1986-02-11 Pfaff Industriemaschinen Gmbh Needle bar detachable drive and stroke adjusting mechanism
US5383418A (en) * 1984-01-16 1995-01-24 Joseph Galkin Corporation Top feed system with toothed belt and clutch
US5249540A (en) * 1990-07-30 1993-10-05 Durkopp Adler Aktiengesellschaft Sewing-material transport device for single-needle or multi-needle sewing machine
US20040154508A1 (en) * 2003-01-29 2004-08-12 Paul Block Top feed belt apparatus for a sewing machine
US20080264317A1 (en) * 2007-04-25 2008-10-30 L&P Property Management Company Soft Goods Slitter and Feed System for Quilting
US20080264222A1 (en) * 2007-04-25 2008-10-30 L&P Property Management Company Soft Goods Slitter and Feed System for Quilting
US7669540B2 (en) * 2007-04-25 2010-03-02 L&P Property Management Company Soft goods slitter and feed system for quilting
US7673575B2 (en) * 2007-04-25 2010-03-09 L&P Property Management Company Soft goods slitter and feed system for quilting

Also Published As

Publication number Publication date
BE774356A (fr) 1972-02-14
ES396277A1 (es) 1974-11-01
FR2113107A5 (it) 1972-06-23
DE2153521A1 (de) 1972-04-27
GB1374759A (en) 1974-11-20
IE35759B1 (en) 1976-05-12
IT942736B (it) 1973-04-02
ZA717039B (en) 1972-07-26
IE35759L (en) 1972-04-23

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Legal Events

Date Code Title Description
AS Assignment

Owner name: TUFTING OPPORTUNITIES NV, J. & B. GORSIRAWEG 6, CU

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BELLAMY, LESLIE M.;REEL/FRAME:004402/0750

Effective date: 19850501

PA Patent available for licence or sale