CN103696151A - Rear puller device for sewing machines - Google Patents

Rear puller device for sewing machines Download PDF

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Publication number
CN103696151A
CN103696151A CN201310755140.5A CN201310755140A CN103696151A CN 103696151 A CN103696151 A CN 103696151A CN 201310755140 A CN201310755140 A CN 201310755140A CN 103696151 A CN103696151 A CN 103696151A
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China
Prior art keywords
tugboat
rod
screw
hole
fixed
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Granted
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CN201310755140.5A
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Chinese (zh)
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CN103696151B (en
Inventor
李军飞
阮小明
冯素莲
潘灵刚
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ZHEJIANG GEMSY MECHANICAL & ELECTRICAL CO., LTD
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Zhejiang Gemsy Mechanical And Electrical Co Ltd
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Priority to CN201310755140.5A priority Critical patent/CN103696151B/en
Publication of CN103696151A publication Critical patent/CN103696151A/en
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Publication of CN103696151B publication Critical patent/CN103696151B/en
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Abstract

The invention provides a rear puller device for sewing machines, belongs to the technical field of sewing machines and solves the problem that after a puller on an existing sewing machine is mounted, the angle is not adjustable. The rear puller device for sewing machines is characterized in that a guide sleeve is fixedly connected to a nose, a vertical shaft is disposed inside the guide sleeve, an upper support is connected to the lower end of the vertical shaft, an upper puller is connected to the upper support, a lower puller is connected to a bench, the vertical shaft is sleeved with a spring, a first adjusting mechanism is disposed between the upper support and the upper puller, a second adjusting mechanism is disposed between the lower puller and the bench, a spindle is further connected inside the nose, a transverse shaft is rotatably connected to the guide sleeve, a link mechanism is disposed between one end of the transverse shaft and the spindle, and a second link mechanism is disposed between the other end of the transverse shaft and the upper puller. The rear puller device for sewing machines can produce large cloth-feeding force, and the angle of the upper puller can be adjusted.

Description

A kind of rear tug device of Sewing machines
Technical field
The invention belongs to sewing machine technique field, relate to a kind of rear tug device of Sewing machines.
Background technology
Sewing machines is to use one or more sewing thread, forms one or more stitchings on sewing, the machine that makes one or more layers sewing interweave or unite by a seam.Sewing function is made the goods such as the fabrics such as cotton, fiber crops, silk, hair, artificial fibre and leather, plastics, paper, the stitching neat appearance of stitching out, smooth firm, and sewing velocity is fast, easy to use.The classification of Sewing machines is according to the purposes of Sewing machines, can be divided into domestic sewing machine, industrial sewing machines and the service trade's Sewing machines between the two, major part in industrial sewing machines all belongs to general Sewing machines, comprises flat seam machine, chain seam machine, quilting machines, overlock machine and flat seaming machine etc.
Tradition Sewing machines feeding style is feed dog feeding, and part is that eedle, presser feet participate in the feeding together of same feed dog together, and this kind of feeding style work feed power is limited, and especially with the sewing of special material, work feed is comparatively painstaking, shows as needle tracking too small.Based on above problem, traditional method is to increase external cloth-dragging wheel device, external cloth-dragging wheel structure is larger, after assembling, complete machine effect is attractive in appearance not, lower cloth-dragging wheel cannot assemble in external cloth-dragging wheel base plate place simultaneously, make to cause work feed power less, and after the installation of upper cloth-dragging wheel, angle cannot be adjusted, and easily causes sewing to send curved during work feed.
Summary of the invention
The object of the invention is to have the problems referred to above for existing technology, proposed a kind of rear tug device of Sewing machines, the rear tug device work feed power of this Sewing machines is large, and can regulate the angle of tugboat.
Object of the present invention can realize by following technical proposal: a kind of rear tug device of Sewing machines, described Sewing machines comprises workbench and head, on described head, be fixed with fairlead, in fairlead, be vertically provided with a vertical pivot, on described vertical pivot, be fixed with a lift block, fairlead is stretched out in the lower end of vertical pivot, and the end, lower end at vertical pivot is connected with upper bracket, tugboat on being connected with on upper bracket, on described workbench, be connected with lower tugboat, on described vertical pivot, be arranged with and can make tugboat wheel face be resisted against the spring on lower tugboat wheel face, described fairlead is provided with the operating mechanism that can make lift block Compress Spring and move up, it is characterized in that, between described upper bracket and upper tugboat, be provided with the governor motion one that can regulate tugboat axioversion degree, between described lower tugboat and workbench, be provided with the governor motion two that can regulate lower tugboat height, in described head, be provided with and can drive tugboat to do the hoisting mechanism pumping, in described head, be also rotatably connected to a main shaft, on described fairlead, be rotatably connected to a transverse axis, between one end of described transverse axis and main shaft, be provided with the linkage one that can drive transverse axis reciprocating rotation when main shaft rotates, between the other end of described transverse axis and upper tugboat, be provided with and when transverse axis reciprocating rotation, can drive upper tugboat to make the linkage two of circumferential reciprocating rotation.
Fairlead vertically arranges, for moving up and down of vertical pivot provides guiding, lower tugboat is fixed on workbench, and regulate its height by governor motion two, upper tugboat is fixed on vertical pivot lower end, and by spring, upper tugboat is pressed on lower tugboat, governor motion one regulates its axioversion degree, regulate the angle of lower tugboat, axial maintenance level when upper tugboat, while going up the contact wire level of tugboat and lower tugboat, sewing can keep traveling priority under the effect of upper tugboat and lower tugboat, when the axial quilt of upper tugboat is adjusted to, go up tugboat and lower tugboat one end to compress power large, the other end to compress power little, now sewing can be done to turn and move, be suitable for making of annular fabric, the angle of turn of sewing can regulate by the angle of upper tugboat simultaneously, therefore applicability is wide, when some special fabrics do not need the work feed power of upper tugboat and lower tugboat, operating mechanism can leave lower tugboat by upper tugboat independent lift, uses convenient, presser foot lifting device on hoisting mechanism and Sewing machines is connected, and can realize the Synchronous lifting of tugboat and presser foot lifter, makes the whole process of making in order compact, drive motors on main shaft and Sewing machines is connected, and it rotates by linkage one and linkage two and realizes speed change and turn to, and then drives the reciprocating rotation of upper tugboat, while being work feed, toward a direction, rotate, after upper tugboat promotes, reverse reverting rotates, and realizes the movement to sewing, and work feed power is large.
In the rear tug device of above-mentioned Sewing machines, described governor motion one comprises cam pin, lower carriage, lock-screw one and lock-screw two, described lower carriage is U-shaped, above-mentioned upper tugboat is rotatably connected in lower carriage, the two ends of described lower carriage all offer screw, described upper bracket offers connecting hole in top position, upper tugboat one end, upper bracket offers respectively adjustment hole and arcuate socket in upper tugboat other end top position, described lock-screw one is located in screw and connecting hole, described lock-screw two is located in screw and arcuate socket, described arcuate socket and lock-screw one concentric setting, described cam pin comprises connecting portion and the adjusting portion that is all column, the external diameter of described adjusting portion is less than the external diameter of connecting portion, and connecting portion and adjusting portion eccentric setting, on described lower carriage, offer a bar hole, the bar shaped direction of this bar hole is axial consistent with upper tugboat, the connecting portion of described cam pin is located in adjustment hole, adjusting portion is located in bar hole, on described upper bracket, also offer a locating hole, the axial perpendicular and perforation of the axial and adjustment hole of this locating hole, in locating hole, be equipped with a dog screw, the inserting end end of described dog screw is resisted against on the connecting portion lateral wall of cam pin.Because lock-screw one and lock-screw two play fixation, while therefore needing to regulate the angle of upper tugboat, lock-screw one and lock-screw two are unclamped, by instrument, rotate cam pin, the connecting portion of cam pin rotates in adjustment hole, and due to adjusting portion and connecting portion eccentric setting, therefore adjusting portion is carried out the movement of horizontal level and vertical position in bar hole, and then promote lower carriage and take the axial line of lock-screw one and rotate as axle center, the position of lock-screw two in arcuate socket is also along with change simultaneously, realize the angular adjustment of lower tugboat, after being adjusted to correct position, screw lock-screw one and lock-screw two.
In the rear tug device of above-mentioned Sewing machines, described governor motion two comprises fixed head, pressing plate, connection bracket and lock-screw three, described fixed head is rectangular, and be connected on workbench, on fixed head, offer two spliced eyes that run through fixed head two long edges, on one plate face of fixed head, offer pressing groove, this pressing groove and two spliced eyes connect, described connection bracket is U-shaped, above-mentioned lower tugboat is rotatably connected on the biside plate of connection bracket, on the plate outer side face of described connection bracket, be vertically fixed with two guide rods, on the lateral wall of this two guide rod, all offer a regulating tank, described two guide rods are located in respectively in two spliced eyes, and regulating tank is relative with pressing groove, described pressing plate ringwise, on the periphery wall of pressing plate, radially there is the service portion of two strip shapes, the relative pressing plate axial line of this two service portion is symmetrical arranged, described pressing plate is worn and is connected in pressing groove by lock-screw three, and two service portions are resisted against respectively in the regulating tank of two guide rods.Guide rod is vertically located in spliced eye, can realize and moving up and down, while needing to regulate the height of lower tugboat, unclamp lock-screw three, by instrument, make pressing plate around lock-screw three rotations, during press plate rotary, the service portion of pressing plate is along with rotation, because service portion is pressed in regulating tank, therefore the rotation of service portion can promote moving up and down of guide rod, screws lock-screw three after moving to correct position, and the height of realizing lower tugboat regulates.
In the rear tug device of above-mentioned Sewing machines, on the upper end of described fairlead, be fixed with a look nut, in look nut, spiral is connected with a pressure regulating screw, described pressure regulating screw penetrates fairlead, described spring housing is located on vertical pivot, and one end of spring is pressed on lift block, the other end is pressed on the inserting end end face of pressure regulating screw.Under the effect of spring, upper tugboat is pressed on lower tugboat, can regulate the amount of stretching into of pressure regulating screw, i.e. the pretightning force of the length of regulating spring, and then regulating spring by rotation pressure regulating screw simultaneously.
In the rear tug device of above-mentioned Sewing machines, described operating mechanism comprises that one is the handle of zigzag, one end of described handle is rotatably connected on fairlead, and this end stretches into fairlead, inserting end end at handle is vertically fixed with a lift cam, on described lift block, have a riser, this riser is horizontally disposed with, and the wheel face of described lift cam is resisted against on the downside of riser.Turning handle, drives lift cam to rotate by handle, and lift cam drives riser to move up, and then drives upper tugboat upwards to promote, and after handle is replied and rotated, the upper tugboat that lift block makes under the effect of spring moves down and is pressed on lower tugboat.
In the rear tug device of above-mentioned Sewing machines, described linkage one comprises connecting rod and upper crank, on described main shaft, be fixed with a driving wheel, the axial line of described main shaft parallels but and does not overlap with the axial line of driving wheel, one end turning set of described upper connecting rod is located on driving wheel, the other end rotates and is plugged with hinge axis, described hinge axis is perpendicular to upper connecting rod, described upper crank one end is connected with transverse axis one end is vertical, on upper crank, offer along its length the upper adjustment tank of bar shaped, above-mentioned hinge axis is located in adjustment tank and is locked by locking nut.Driving wheel and spindle eccentricity setting, while being main shaft rotation, upper connecting rod is realized and is swung and move under the effect of driving wheel, and then drive upper crank to swing around transverse axis, while unclamping due to locking nut simultaneously, hinge axis can move in upper adjustment tank, regulates the effective interaction length of upper crank, and then regulates the amount of spin of transverse axis when above connecting rod single swings.
In the rear tug device of above-mentioned Sewing machines, described linkage two comprises lower crank, adjustment pin, ball journal handle, connecting rod and lower link, described lower crank one end is connected with the transverse axis other end is vertical, on lower crank, offer along its length lower adjustment tank, described adjustment pin one end is vertically located in lower adjustment tank, and be locked by locking nut, the other end rotates the one end that is plugged on connecting rod, described adjustment pin and connecting rod are perpendicular, on the other end lateral wall of described connecting rod, there is external screw thread, one end of described lower link offers blind hole along its length, and the end at lower link is fixed with attaching nut, above-mentioned connecting rod coil is crossed attaching nut and is located in blind hole, on the turning cylinder of described upper tugboat, be vertically fixed with rocking bar, one end of described ball journal handle is rotatably connected on lower link, the other end is connected mutually with rocking bar, and ball journal handle respectively with lower link, rocking bar is perpendicular.The reciprocating rotation of transverse axis can drive the swing of lower crank, and lower crank drives connecting rod and lower link to move by adjustment pin, and then drives rocking bar to swing, and goes up tugboat and realizes reciprocating rotation, realize the transmission to sewing; Wherein, owing to being threaded connection between connecting rod and lower link, can relatively rotate between the two, therefore, when lower tugboat carries out angular adjustment, above-mentioned both can relatively rotate, and avoid the interference to lower tugboat angular adjustment; And when locking nut unclamps, adjustment pin can move in lower adjustment tank, regulate the effective interaction length of lower crank, the amount of spin of upper tugboat while being transverse axis single revolution, the adjusting that linking rod mechanism is a kind of, thereby realize, the amount of spin of upper tugboat and lower tugboat single is regulated, cloth feed amount is adjusted.
In the rear tug device of above-mentioned Sewing machines, described hoisting mechanism comprises that knee carries cam, promote connecting rod one, promote connecting rod two, promote connecting rod three and promote connecting rod four, described lifting connecting rod one and lifting connecting rod three are all L-type, described knee is carried cam and is rotatably connected on head by a bearing pin, and this bearing pin and vertical being connected in bending place that promotes connecting rod one, the bending place of described lifting connecting rod three is rotatably connected on fairlead lateral wall by bearing pin, described lifting connecting rod two is strip, one end of this lifting connecting rod two is hinged with the one end that promotes connecting rod one, the other end is hinged with the one end that promotes connecting rod three, the other end of described lifting connecting rod three is rotatably connected to and promotes connecting rod four, on described lifting connecting rod four, be vertically fixed with connecting pin, on the lateral wall of described fairlead, offer along its length pilot hole, described connecting pin passes pilot hole and is connected mutually with lift block.The driving mechanism of carrying knee cam and presser foot lifter is connected, when driving presser foot lifter to rise, related driving is carried knee cam and is rotated, and by connecting rod transmission, connecting pin is moved up in pilot hole, lift block is moved up, the Synchronous lifting of tugboat and presser foot lifter in realization.
In the rear tug device of above-mentioned Sewing machines, on described lifting connecting rod four, offer along its length the adjusting hole of strip, above-mentioned connecting pin one end is located in adjusting hole and by lock-screw, locks four and fix.After regulating spring pretightning force, the position of vertical pivot changes, and connecting pin is fixed on lift block, therefore can in adjusting hole, move, and avoids stuck.
In the rear tug device of above-mentioned Sewing machines, on described upper bracket, vertically offer through hole, the lower end of described vertical pivot is located in through hole and is fixed by a hold-down screw, on described vertical pivot, be vertically fixed with a guide plate, on described guide plate, offer a guiding breach, on described upper bracket, be vertically fixed with one with the guide post of perpendicular axially parallel, described guide post is located in guiding breach.When hold-down screw unclamps, upper bracket can move relative to vertical pivot, and guide post plays guide effect to the movement of upper bracket, limits the rotation of upper bracket simultaneously, makes tugboat remain that with lower tugboat line contacts, and the height of having realized upper tugboat regulates.
Compared with prior art, the rear tug device of this Sewing machines has the following advantages:
While 1, being adjusted to due to the axial quilt of upper tugboat, go up tugboat and lower tugboat one end to compress power large, the other end to compress power little, now sewing can be done to turn and move, be suitable for making of annular fabric, the angle of turn of sewing can regulate by the angle of upper tugboat simultaneously, so applicability is wide.
2, the effective interaction length due to lower crank and upper crank all can regulate, and when both can realize main shaft single revolution after combining, the amount of spin of upper tugboat is adjusted, and cloth feed amount is adjusted.
Therefore 3, due to when some special fabrics do not need the work feed power of upper tugboat and lower tugboat, operating mechanism can leave lower tugboat by upper tugboat independent lift, uses conveniently, and applicability is wider.
4, because rotation pressure regulating screw can regulate the amount of stretching into of pressure regulating screw, i.e. the pretightning force of the length of regulating spring, and then regulating spring, therefore can regulate the power that compresses of tugboat and lower tugboat.
Accompanying drawing explanation
Fig. 1 is the perspective view of the rear tug device of this Sewing machines.
Fig. 2 is the sectional perspective structural representation of the rear tug device of this Sewing machines.
Fig. 3 is the structure enlarged drawing at A place in Fig. 2.
Fig. 4 is the structure explosive view of governor motion one.
Fig. 5 is the structure explosive view of governor motion two.
Fig. 6 is the structure enlarged drawing at B place in Fig. 2.
Fig. 7 is the structure enlarged drawing at C place in Fig. 1.
Fig. 8 is the structure enlarged drawing at D place in Fig. 1.
Fig. 9 is the partial structurtes explosive view in Fig. 8.
In figure, 1, workbench; 11, fairlead; 12, main shaft; 13, transverse axis; 2, vertical pivot; 21, lift block; 22, spring; 23, pressure regulating screw; 24, look nut; 25, guide plate; 251, guiding breach; 3, upper tugboat; 4, lower tugboat; 5, operating mechanism; 51, handle; 52, lift cam; 53, riser; 6, governor motion one; 61, upper bracket; 611, adjustment hole; 612, arcuate socket; 613, locating hole; 614, through hole; 615, guide post; 616, hold-down screw; 62, lower carriage; 621, screw; 622, bar hole; 63, cam pin; 631, connecting portion; 632, adjusting portion; 64, lock-screw one; 65, lock-screw two; 66, dog screw; 7, governor motion two; 71, fixed head; 711, spliced eye; 712, pressing groove; 72, connection bracket; 721, guide rod; 722, regulating tank; 73, pressing plate; 731, service portion; 74, lock-screw three; 8, hoisting mechanism; 81, knee is carried cam; 82, promote connecting rod one; 83, promote connecting rod two; 84, promote connecting rod three; 85, promote connecting rod four; 851, adjusting hole; 86, connecting pin; 87, screw lock four; 9a, linkage one; 91a, upper connecting rod; 92a, upper crank; 921a, upper adjustment tank; 93a, driving wheel; 94a, hinge axis; 95a, locking nut; 9b, linkage two; 91b, lower crank; 911b, lower adjustment tank; 92b, adjustment pin; 93b, connecting rod; 94b, lower link; 95b, ball journal handle; 96b, rocking bar; 97b, attaching nut.
The specific embodiment
Be below specific embodiments of the invention by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiment.
As shown in Figure 1 and Figure 2, a kind of rear tug device of Sewing machines, Sewing machines comprises workbench 1 and head, is fixed with fairlead 11 on head, at the interior vertical pivot 2 that is vertically provided with of fairlead 11, fairlead 11 vertically arranges, for moving up and down of vertical pivot 2 provides guiding.On vertical pivot 2, be fixed with a lift block 21, fairlead 11 is stretched out in the lower end of vertical pivot 2, and the end, lower end at vertical pivot 2 is connected with upper bracket 61, on upper bracket 61, be connected with tugboat 3, on workbench 1, be connected with lower tugboat 4, on vertical pivot 2, be arranged with spring 22, under the effect of spring 22, upper tugboat 3 wheel faces are resisted against on lower tugboat 4 wheel faces.Fairlead 11 is provided with the operating mechanism 5 that can make lift block 21 Compress Springs 22 and move up, when some special fabrics do not need the work feed power of upper tugboat 3 and lower tugboat 4, operating mechanism 5 can leave lower tugboat 4 by upper tugboat 3 independent lift, uses convenient.Between upper bracket 61 and upper tugboat 3, be provided with the governor motion 1 that can regulate tugboat 3 axioversion degree, governor motion 1 regulates its axioversion degree, regulate the angle of lower tugboat 4, axial maintenance level when upper tugboat 3, while going up the contact wire level of tugboat 3 and lower tugboat 4, sewing can keep traveling priority under the effect of upper tugboat 3 and lower tugboat 4, when the axial quilt of upper tugboat 3 is adjusted to, go up tugboat 3 and lower tugboat 4 one end to compress power large, the other end to compress power little, now sewing can be done to turn and move, be suitable for making of annular fabric, the angle of turn of sewing can regulate by the angle of upper tugboat 3 simultaneously, therefore applicability is wide.Between lower tugboat 4 and workbench 1, be provided with the governor motion 27 that can regulate lower tugboat 4 height.In head, be provided with the hoisting mechanism 8 that can drive tugboat 3 to do to pump, hoisting mechanism 8 is connected with the presser foot lifting device on Sewing machines, can realize the Synchronous lifting of tugboat 3 and presser foot lifter, makes the whole process of making in order compact.In head, be also rotatably connected to a main shaft 12, on fairlead 11, be rotatably connected to a transverse axis 13, between one end of transverse axis 13 and main shaft 12, be provided with linkage one 9a that can drive transverse axis 13 reciprocating rotations when main shaft 12 rotates, between the other end of transverse axis 13 and upper tugboat 3, be provided with linkage two 9b that can drive upper tugboat 3 to do circumferential reciprocating rotation when transverse axis 13 reciprocating rotation, main shaft 12 is connected with the drive motors on Sewing machines, it rotates by linkage one 9a and linkage two 9b and realizes speed change and turn to, and then the reciprocating rotation of the upper tugboat 3 of drive, while being work feed, toward a direction, rotate, after upper tugboat 3 promotes, reverse reverting rotates, the movement of realization to sewing, work feed power is large.
Specifically, shown in Fig. 3, on the upper end of fairlead 11, be fixed with a look nut 24, in look nut 24, spiral is connected with a pressure regulating screw 23, pressure regulating screw 23 penetrates fairlead 11, spring 22 is set on vertical pivot 2, and one end of spring 22 is pressed on lift block 21, the other end is pressed on the inserting end end face of pressure regulating screw 23, under the effect of spring 22, upper tugboat 3 is pressed on lower tugboat 4, by rotation pressure regulating screw 23, can regulate the amount of stretching into of pressure regulating screw 23 simultaneously, be the length of regulating spring 22, and then the pretightning force of regulating spring 22.On upper bracket 61, vertically offer through hole 614, the lower end of vertical pivot 2 is located in through hole 614 and is fixed by a hold-down screw 616, on vertical pivot 2, be vertically fixed with a guide plate 25, on guide plate 25, offer a guiding breach 251, on upper bracket 61, be vertically fixed with one with vertical pivot 2 to parallel guide post 615, guide post 615 is located in guiding breach 251, when hold-down screw 616 unclamps, upper bracket 61 can move relative to vertical pivot 2, and guide effect is played in the movement of 615 pairs of upper brackets 61 of guide post, limit the rotation of upper bracket 61 simultaneously, make tugboat 3 remain that with lower tugboat 4 line contacts, the height of having realized upper tugboat 3 regulates.
Shown in Fig. 4, governor motion 1 comprises cam pin 63, lower carriage 62, lock-screw 1 and lock-screw 2 65, lower carriage 62 is U-shaped, above-mentioned upper tugboat 3 is rotatably connected in lower carriage 62, the two ends of lower carriage 62 all offer screw 621, upper bracket 61 offers connecting hole in upper tugboat 3 top positions, one end, in upper tugboat 3 other end top positions, offer respectively adjustment hole 611 and arcuate socket 612, lock-screw 1 is located in screw 621 and connecting hole, lock-screw 2 65 is located in screw 621 and arcuate socket 612, arcuate socket 612 and lock-screw one 64 concentric settings, cam pin 63 comprises connecting portion 631 and the adjusting portion 632 that is all column, the external diameter of adjusting portion 632 is less than the external diameter of connecting portion 631, and connecting portion 631 and adjusting portion 632 eccentric settings, on lower carriage 62, offer a bar hole 622, the bar shaped direction of this bar hole 622 is axial consistent with upper tugboat 3, the connecting portion 631 of cam pin 63 is located in adjustment hole 611, adjusting portion 632 is located in bar hole 622, on upper bracket 61, also offer a locating hole 613, the axial perpendicular and perforation of the axial and adjustment hole 611 of this locating hole 613, in locating hole 613, be equipped with a dog screw 66, the inserting end end of dog screw 66 is resisted against on connecting portion 631 lateral walls of cam pin 63, because lock-screw 1 and lock-screw 2 65 play fixation, while therefore needing to regulate the angle of upper tugboat 3, lock-screw 1 and lock-screw 2 65 are unclamped, by instrument, rotate cam pin 63, the connecting portion 631 of cam pin 63 is in the interior rotation of adjustment hole 611, and due to adjusting portion 632 and connecting portion 631 eccentric settings, therefore adjusting portion 632 is carried out the movement of horizontal level and vertical position in bar hole 622, and then promote lower carriage 62 and take the axial line of lock-screw 1 and rotate as axle center, the position of lock-screw 2 65 in arcuate socket 612 is also along with change simultaneously, realize the angular adjustment of lower tugboat 4, after being adjusted to correct position, screw lock-screw 1 and lock-screw 2 65.
Shown in Fig. 5, governor motion 27 comprises fixed head 71, pressing plate 73, connection bracket 72 and lock-screw 3 74, fixed head 71 is rectangular, and be connected on workbench 1, on fixed head 71, offer two spliced eyes 711 that run through 71 liang of long edges of fixed head, on one plate face of fixed head 71, offer pressing groove 712, this pressing groove 712 and two spliced eyes 711 connect, connection bracket 72 is U-shaped, lower tugboat 4 is rotatably connected on the biside plate of connection bracket 72, on the plate outer side face of connection bracket 72, be vertically fixed with two guide rods 721, on the lateral wall of this two guide rod 721, all offer a regulating tank 722, two guide rods 721 are located in respectively in two spliced eyes 711, and regulating tank 722 is relative with pressing groove 712, pressing plate 73 ringwise, the service portion 731 radially on the periphery wall of pressing plate 73 with two strip shapes, relative pressing plate 73 axial lines of this two service portion 731 are symmetrical arranged, pressing plate 73 is worn and is connected in pressing groove 712 by lock-screw 3 74, and two service portions 731 are resisted against respectively in the regulating tank 722 of two guide rods 721, guide rod 721 is vertically located in spliced eye 711, can realize and moving up and down, while needing to regulate the height of lower tugboat 4, unclamp lock-screw 3 74, by instrument, pressing plate 73 is rotated around lock-screw 3 74, when pressing plate 73 rotates, the service portion 731 of pressing plate 73 is along with rotation, because service portion 731 is pressed in regulating tank 722, therefore the rotation of service portion 731 can promote moving up and down of guide rod 721, after moving to correct position, screw lock-screw 3 74, the height of realizing lower tugboat 4 regulates.
Shown in Fig. 6, operating mechanism 5 comprises that one is the handle 51 of zigzag, one end of handle 51 is rotatably connected on fairlead 11, and this end stretches into fairlead 11, in the inserting end end of handle 51, be vertically fixed with a lift cam 52, on lift block 21, there is a riser 53, this riser 53 is horizontally disposed with, the wheel face of lift cam 52 is resisted against on the downside of riser 53, turning handle 51, by handle 51, drive lift cam 52 to rotate, lift cam 52 drives riser 53 to move up, and then drive upper tugboat 3 upwards to promote, after handle 51 is replied and is rotated, the upper tugboat 3 that lift block 21 makes under the effect of spring 22 moves down and is pressed on lower tugboat 4.
Shown in Fig. 7, linkage one 9a comprises connecting rod 91a and upper crank 92a, on main shaft 12, be fixed with a driving wheel 93a, the axial line of main shaft 12 parallels but and does not overlap with the axial line of driving wheel 93a, one end turning set of upper connecting rod 91a is located on driving wheel 93a, the other end rotates and is plugged with hinge axis 94a, hinge axis 94a is perpendicular to upper connecting rod 91a, upper crank 92a one end and vertical being connected in transverse axis 13 one end, on upper crank 92a, offer along its length the upper adjustment tank 921a of bar shaped, hinge axis 94a is located in adjustment tank 921a and is locked by locking nut 95a, driving wheel 93a and main shaft 12 eccentric settings, while being main shaft 12 rotation, upper connecting rod 91a realizes and swings and move under the effect of driving wheel 93a, and then drive upper crank 92a to swing around transverse axis 13, while unclamping due to locking nut 95a simultaneously, hinge axis 94a can move in upper adjustment tank 921a, regulate the effective interaction length of upper crank 92a, and then the amount of spin of transverse axis 13 while regulating connecting rod 91a single to swing.
In conjunction with Fig. 8, shown in Fig. 9, linkage two 9b comprise lower crank 91b, adjustment pin 92b, ball journal handle 95b, connecting rod 93b and lower link 94b, lower crank 91b one end and vertical being connected of transverse axis 13 other ends, on lower crank 91b, offer along its length lower adjustment tank 911b, adjustment pin 92b one end is vertically located in lower adjustment tank 911b, and be locked by locking nut 95a, the other end rotates the one end that is plugged on connecting rod 93b, adjustment pin 92b and connecting rod 93b are perpendicular, on the other end lateral wall of connecting rod 93b, there is external screw thread, one end of lower link 94b offers blind hole along its length, and be fixed with attaching nut 97b in the end of lower link 94b, connecting rod 93b coil is crossed attaching nut 97b and is located in blind hole, on the turning cylinder of described upper tugboat 3, be vertically fixed with rocking bar 96b, one end of ball journal handle 95b is rotatably connected on lower link 94b, the other end is connected mutually with rocking bar 96b, and ball journal handle 95b respectively with lower link 94b, rocking bar 96b is perpendicular, the reciprocating rotation of transverse axis 13 can drive the swing of lower crank 91b, lower crank 91b drives connecting rod 93b and lower link 94b to move by adjustment pin 92b, and then drive rocking bar 96b to swing, go up tugboat 3 and realize reciprocating rotation, the transmission of realization to sewing, wherein, owing to being threaded connection between connecting rod 93b and lower link 94b, can relatively rotate between the two, therefore, when lower tugboat 4 carries out angular adjustment, above-mentioned both can relatively rotate, and avoid the interference to lower tugboat 4 angular adjustment, and when locking nut 95a unclamps, adjustment pin 92b can move in lower adjustment tank 911b, regulate the effective interaction length of lower crank 91b, the amount of spin of upper tugboat 3 while being transverse axis 13 single revolution, the adjusting of linking rod mechanism one 9a kind, thereby realize, upper tugboat 3 and the amount of spin of lower tugboat 4 singles are regulated, cloth feed amount is adjusted.
Hoisting mechanism 8 comprises that knee carries cam 81, promote connecting rod 1, promote connecting rod 2 83, promote connecting rod 3 84 and promote connecting rod 4 85, promote connecting rod 1 and promote connecting rod 3 84 and be all L-type, knee is carried cam 81 and is rotatably connected on head by a bearing pin, and this bearing pin and vertical being connected in bending place that promotes connecting rod 1, the bending place that promotes connecting rod 3 84 is rotatably connected on fairlead 11 lateral walls by bearing pin, promote connecting rod 2 83 and be strip, one end of this lifting connecting rod 2 83 is hinged with the one end that promotes connecting rod 1, the other end is hinged with the one end that promotes connecting rod 3 84, the other end that promotes connecting rod 3 84 is rotatably connected to and promotes connecting rod 4 85, promote on connecting rod 4 85 and be vertically fixed with connecting pin 86, on the lateral wall of fairlead 11, offer along its length pilot hole, connecting pin 86 passes pilot hole and is connected mutually with lift block 21, the driving mechanism of carrying knee cam and presser foot lifter is connected, when driving presser foot lifter to rise, related driving is carried knee cam and is rotated, and by connecting rod transmission, connecting pin 86 is moved up in pilot hole, lift block 21 is moved up, the Synchronous lifting of tugboat 3 and presser foot lifter in realization.Promote the adjusting hole 851 that offers along its length strip on connecting rod 4 85, connecting pin 86 one end are located in adjusting hole 851 and are locked by lock-screw, after regulating spring 22 pretightning forces, the position of vertical pivot 2 changes, and connecting pin 86 is fixed on lift block 21, therefore can, in the interior movement of adjusting hole 851, avoid stuck.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although more used the terms such as workbench 1, fairlead 11, main shaft 12, transverse axis 13, vertical pivot 2, lift block 21 herein, do not got rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present invention; They are construed to any additional restriction is all contrary with spirit of the present invention.

Claims (10)

1. the rear tug device of a Sewing machines, described Sewing machines comprises workbench (1) and head, on described head, be fixed with fairlead (11), in fairlead (11), be vertically provided with a vertical pivot (2), on described vertical pivot (2), be fixed with a lift block (21), fairlead (11) is stretched out in the lower end of vertical pivot (2), and be connected with upper bracket (61) in the end, lower end of vertical pivot (2), on upper bracket (61), be connected with upper tugboat (3), on described workbench (1), be connected with lower tugboat (4), on described vertical pivot (2), be arranged with and can make tugboat (3) wheel face be resisted against the spring (22) on lower tugboat (4) wheel face, described fairlead (11) is provided with the operating mechanism (5) that can make lift block (21) Compress Spring (22) and move up, it is characterized in that, between described upper bracket (61) and upper tugboat (3), be provided with the governor motion one (6) that can regulate tugboat (3) axioversion degree, between described lower tugboat (4) and workbench (1), be provided with the governor motion two (7) that can regulate lower tugboat (4) height, in described head, be provided with the hoisting mechanism (8) that can drive tugboat (3) to do to pump, in described head, be also rotatably connected to a main shaft (12), on described fairlead (11), be rotatably connected to a transverse axis (13), between one end of described transverse axis (13) and main shaft (12), be provided with the linkage one (9a) that can drive transverse axis (13) reciprocating rotation when main shaft (12) rotates, between the other end of described transverse axis (13) and upper tugboat (3), being provided with when transverse axis (13) reciprocating rotation to drive upper tugboat (3) to make the linkage two (9b) of circumferential reciprocating rotation.
2. the rear tug device of Sewing machines according to claim 1, it is characterized in that, described governor motion one (6) comprises cam pin (63), lower carriage (62), lock-screw one (64) and lock-screw two (65), described lower carriage (62) is U-shaped, above-mentioned upper tugboat (3) is rotatably connected in lower carriage (62), the two ends of described lower carriage (62) all offer screw (621), described upper bracket (61) offers connecting hole in upper tugboat (3) top position, one end, upper bracket (61) offers respectively adjustment hole (611) and arcuate socket (612) in upper tugboat (3) other end top position, described lock-screw one (64) is located in screw (621) and connecting hole, described lock-screw two (65) is located in screw (621) and arcuate socket (612), described arcuate socket (612) and lock-screw one (64) concentric setting, described cam pin (63) comprises connecting portion (631) and the adjusting portion (632) that is all column, the external diameter of described adjusting portion (632) is less than the external diameter of connecting portion (631), and connecting portion (631) and adjusting portion (632) eccentric setting, on described lower carriage (62), offer a bar hole (622), the bar shaped direction of this bar hole (622) is axial consistent with upper tugboat (3), the connecting portion (631) of described cam pin (63) is located in adjustment hole (611), adjusting portion (632) is located in bar hole (622), on described upper bracket (61), also offer a locating hole (613), the axial perpendicular and perforation of the axial and adjustment hole (611) of this locating hole (613), in locating hole (613), be equipped with a dog screw (66), the inserting end end of described dog screw (66) is resisted against on connecting portion (631) lateral wall of cam pin (63).
3. the rear tug device of Sewing machines according to claim 2, it is characterized in that, described governor motion two (7) comprises fixed head (71), pressing plate (73), connection bracket (72) and lock-screw three (74), described fixed head (71) is rectangular, and be connected on workbench (1), on fixed head (71), offer two spliced eyes (711) that run through fixed head (71) two long edges, on one plate face of fixed head (71), offer pressing groove (712), this pressing groove (712) connects with two spliced eyes (711), described connection bracket (72) is U-shaped, above-mentioned lower tugboat (4) is rotatably connected on the biside plate of connection bracket (72), on the plate outer side face of described connection bracket (72), be vertically fixed with two guide rods (721), on the lateral wall of this two guide rod (721), all offer a regulating tank (722), described two guide rods (721) are located in respectively in two spliced eyes (711), and regulating tank (722) is relative with pressing groove (712), described pressing plate (73) ringwise, the service portion (731) radially on the periphery wall of pressing plate (73) with two strip shapes, this two service portion (731) relatively pressing plate (73) axial line is symmetrical arranged, described pressing plate (73) is worn and is connected in pressing groove (712) by lock-screw three (74), and two service portions (731) are resisted against respectively in the regulating tank (722) of two guide rods (721).
4. the rear tug device of Sewing machines according to claim 1, it is characterized in that, on the upper end of described fairlead (11), be fixed with a look nut (24), in look nut (24), spiral is connected with a pressure regulating screw (23), described pressure regulating screw (23) penetrates fairlead (11), it is upper that described spring (22) is set in vertical pivot (2), and to be pressed on lift block (21) upper in one end of spring (22), and the other end is pressed on the inserting end end face of pressure regulating screw (23).
5. the rear tug device of Sewing machines according to claim 1, it is characterized in that, described operating mechanism (5) comprises that one is the handle (51) of zigzag, one end of described handle (51) is rotatably connected on fairlead (11), and this end stretches into fairlead (11), in the inserting end end of handle (51), be vertically fixed with a lift cam (52), on described lift block (21), there is a riser (53), this riser (53) is horizontally disposed with, and the wheel face of described lift cam (52) is resisted against on the downside of riser (53).
6. according to the rear tug device of the Sewing machines described in claim 3 or 4 or 5, it is characterized in that, described linkage one (9a) comprises connecting rod (91a) and upper crank (92a), on described main shaft (12), be fixed with a driving wheel (93a), the axial line of described main shaft (12) parallels but and does not overlap with the axial line of driving wheel (93a), one end turning set of described upper connecting rod (91a) is located on driving wheel (93a), the other end rotates and is plugged with hinge axis (94a), described hinge axis (94a) is perpendicular to upper connecting rod (91a), described upper crank (92a) one end and vertical being connected in transverse axis (13) one end, on upper crank (92a), offer along its length the upper adjustment tank (921a) of bar shaped, above-mentioned hinge axis (94a) is located in adjustment tank (921a) and is locked by locking nut (95a).
7. the rear tug device of Sewing machines according to claim 6, it is characterized in that, described linkage two (9b) comprises lower crank (91b), adjustment pin (92b), ball journal handle (95b), connecting rod (93b) and lower link (94b), described lower crank (91b) one end and vertical being connected of transverse axis (13) other end, on lower crank (91b), offer along its length lower adjustment tank (911b), described adjustment pin (92b) one end is vertically located in lower adjustment tank (911b), and be locked by locking nut (95a), the other end rotates the one end that is plugged on connecting rod (93b), described adjustment pin (92b) is perpendicular with connecting rod (93b), on the other end lateral wall of described connecting rod (93b), there is external screw thread, one end of described lower link (94b) offers blind hole along its length, and be fixed with attaching nut (97b) in the end of lower link (94b), above-mentioned connecting rod (93b) coil is crossed attaching nut (97b) and is located in blind hole, on the turning cylinder of described upper tugboat (3), be vertically fixed with rocking bar (96b), one end of described ball journal handle (95b) is rotatably connected on lower link (94b), the other end is connected mutually with rocking bar (96b), and ball journal handle (95b) respectively with lower link (94b), (96b) is perpendicular for rocking bar.
8. the rear tug device of Sewing machines according to claim 7, it is characterized in that, described hoisting mechanism (8) comprises that knee carries cam (81), promote connecting rod one (82), promote connecting rod two (83), promote connecting rod three (84) and promote connecting rod four (85), described lifting connecting rod one (82) and lifting connecting rod three (84) are all L-type, described knee is carried cam (81) and is rotatably connected on head by a bearing pin, and this bearing pin and vertical being connected in bending place that promotes connecting rod one (82), the bending place of described lifting connecting rod three (84) is rotatably connected on fairlead (11) lateral wall by bearing pin, described lifting connecting rod two (83) is strip, one end of this lifting connecting rod two (83) is hinged with the one end that promotes connecting rod one (82), the other end is hinged with the one end that promotes connecting rod three (84), the other end of described lifting connecting rod three (84) is rotatably connected to and promotes connecting rod four (85), on described lifting connecting rod four (85), be vertically fixed with connecting pin (86), on the lateral wall of described fairlead (11), offer along its length pilot hole, described connecting pin (86) passes pilot hole and is connected mutually with lift block (21).
9. the rear tug device of Sewing machines according to claim 8, it is characterized in that, on described lifting connecting rod four (85), offer along its length the adjusting hole (851) of strip, above-mentioned connecting pin (86) one end is located in adjusting hole (851) and by lock-screw, locks four (87) and fix.
10. the rear tug device of Sewing machines according to claim 2, it is characterized in that, on described upper bracket (61), vertically offer through hole (614), the lower end of described vertical pivot (2) is located in through hole (614) and is fixed by a hold-down screw (616), on described vertical pivot (2), be vertically fixed with a guide plate (25), on described guide plate (25), offer a guiding breach (251), on described upper bracket (61), be vertically fixed with one with vertical pivot (2) to parallel guide post (615), described guide post (615) is located in guiding breach (251).
CN201310755140.5A 2013-12-31 2013-12-31 A kind of rear tug device of Sewing machines Active CN103696151B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106555278A (en) * 2016-11-30 2017-04-05 西安标准工业股份有限公司 Portable blind stitching machine
WO2021052081A1 (en) * 2019-09-21 2021-03-25 浙江翔科缝纫机股份有限公司 Automatic rear dragging wheel lifting structure on sewing machine

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US1765206A (en) * 1929-04-01 1930-06-17 Union Special Machine Co Feeding mechanism for sewing machines
US5509366A (en) * 1994-04-28 1996-04-23 Clinton Industries, Inc. Puller apparatus
CN1609316A (en) * 2004-07-16 2005-04-27 王必斌 Auxiliary cloth-handling mechanism for sewing machine
CN2908564Y (en) * 2006-04-05 2007-06-06 禾格实业有限公司 Improved structure of cloth feeding device for sewing machine
CN203668638U (en) * 2013-12-31 2014-06-25 浙江宝石机电股份有限公司 Rear dragging wheel device of sewing machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1765206A (en) * 1929-04-01 1930-06-17 Union Special Machine Co Feeding mechanism for sewing machines
US5509366A (en) * 1994-04-28 1996-04-23 Clinton Industries, Inc. Puller apparatus
CN1609316A (en) * 2004-07-16 2005-04-27 王必斌 Auxiliary cloth-handling mechanism for sewing machine
CN2908564Y (en) * 2006-04-05 2007-06-06 禾格实业有限公司 Improved structure of cloth feeding device for sewing machine
CN203668638U (en) * 2013-12-31 2014-06-25 浙江宝石机电股份有限公司 Rear dragging wheel device of sewing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106555278A (en) * 2016-11-30 2017-04-05 西安标准工业股份有限公司 Portable blind stitching machine
WO2021052081A1 (en) * 2019-09-21 2021-03-25 浙江翔科缝纫机股份有限公司 Automatic rear dragging wheel lifting structure on sewing machine

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Effective date of registration: 20151229

Address after: Taizhou City, Zhejiang province 318000 Jiaojiang Xiachen street, Airport Road No. 1

Patentee after: ZHEJIANG GEMSY MECHANICAL & ELECTRICAL CO., LTD

Address before: 318000, No. 638, East Ring Road, Taizhou Economic Development Zone, Jiaojiang District, Zhejiang, Taizhou

Patentee before: Zhejiang Gemsy Mechanical and Electrical Co., Ltd.