CN201390870Y - Intelligent sewing machine with durable base line - Google Patents

Abstract

The utility model discloses an intelligent sewing machine with a durable base line and relates to a sewing machine. The sewing machine comprises a needle bar, a frame needle, a needle plate, a vertical shaft, a lower shaft driven by the vertical shaft to rotate and also a base line reel push-pull device, a transmission mechanism including the vertical shaft and the lower shaft, a line expanding device and a take-up lever matched with the line expanding device, wherein the transmission mechanism drives the line expanding device and the push-pull device to do synchronous motion; and the sewing machine also comprises a rag knife and a line lack-break alarm device. The sewing machine directly uses a merchant line reel as a line source of the base line, does not need special winding, greatly improves the quantity of the base line, saves line changing time and effectively improves the working efficiency. When the rag knife is arranged, the sewing machine can better cut off the redundant corners of fabric in one working procedure when sewing, thus improving working efficiency; when the line lack-break alarm device is arranged, the sewing machine can better avoid a great quantity of idle needle holes on products when lacking or breaking lines, as leather products or other special products are useless if the needle holes are excessive.

Description

The intelligent Sewing machines that a kind of bottom line is durable

Technical field

The utility model relates to a kind of Sewing machines, relates in particular to the durable intelligent Sewing machines of a kind of bottom line.

Background technology

Rotating shuttle formula sewing devices such as present Sewing machines and embroidery machine, its bottom line generator all adopts the structure of shuttle peg winding, rotary shuttle hook line, because peg or spindle is little, the coiling amount is few, often need in the course of the work to change peg or spindle, the process of making is frequently interrupted, and greatly reduces operating efficiency.Cause wire terminal many in addition, influence the outward appearance of finished product, the wire terminal on the high-grade goods has had a strong impact on the Products Quality class, and this problem is badly in need of improving.

The utility model content

At the problem that above-mentioned prior art exists, the utility model provides a kind of Sewing machines that can directly use commercially available line tube as bottom line, also need not special coiling, has improved the line amount of bottom line greatly, has effectively improved operating efficiency.

The technical solution of the utility model is: the intelligent Sewing machines that a kind of bottom line is durable, comprise shank, eedle, needle plate, vertical pivot, drive the lower shaft that rotates by vertical pivot, also comprise bottom line line tube push-pull device at fixed, comprise vertical pivot and lower shaft transmission mechanism, expand line apparatus and and expand the thread take-up tension lever of line apparatus coupling, transmission mechanism drives and expands line apparatus and push-pull device at fixed is synchronized with the movement; Push-pull device at fixed comprises draw ring, bottom line cylinder base and the throw-out collar that wears successively from left to right on lower shaft horizontal bottom line tube axle, expansion pin device axle and the bottom line tube axle that vertically the below is provided with, bottom line tube axle and expand that pin device axle is located along the same line and the space that forms is positioned at the vertical below of eedle between the two, draw ring and bottom line cylinder base contact, leave the space between bottom line cylinder base and the throw-out collar, draw ring, bottom line cylinder base and throw-out collar can and expand left and right sides smooth sliding on the pin device axle at bottom line tube axle; Expand line apparatus and comprise the expansion pin device shell that is fixed in the left end opening that expands pin device axle right part, expand the expansion pin device that can horizontally slip that wears on the pin device axle thereon and be located at and expand on the pin device left side around expanding pin device axle distribution triangular in shape and expanding the line pins from expanding the thimble and two that pin device shell opener stretches out, thimble be provided with spring structure can about flexible, expanding the line pin is the elasticity pin, the bottom is provided with the torsion spring structure with expansion pin device active connection place makes it tightly lean to edge in expanding pin device shell opener all the time, and two expansion line needle tips and thimble front end intersected at a point when expansion pin device was positioned at its stroke low order end, right side and tip direction that the thimble tip is in close proximity to the planar coil that upper thread and eedle line hole form intersect with planar coil circle face, and the space that surrounds in the middle of three pins can hold a bottom line cylinder base that cover reaches the standard grade tin all the time in it.

As preferably, described transmission mechanism comprises vertical pivot, lower shaft, the horizontal vertical pivot power transmission shaft that the vertical below of lower shaft is provided with and the drive sprocket axle of vertical direction, the horizontally disposed driving wheel that gear that each between centers cooperates and vertical pivot power transmission shaft and vertical pivot lower end are connected and fixed respectively, the lower shaft left part is provided with the lower shaft roller gear, two ends, the vertical pivot power transmission shaft left and right sides are provided with the left bevel gear and the right bevel gear of left and right sides mirror image symmetry, the drive sprocket axle lower end is provided with the drive sprocket axle bevel gear with left bevel gear engagement, the vertical pivot bottom is provided with the vertical pivot bevel gear with right bevel gear engagement, and the same position of two driving wheels is connected by the chain bar with throw-out collar with draw ring separately dividually.

As preferably, described expansion pin device is formed by being arranged in the spring, clutch block and the expansion pin device gear that expand on the pin device axle from left to right successively, clutch block is cylinder, being blocked the left clutch block and the right clutch block that form by cylinder by an arcwall face vertical side forms, cylinder axis, expansion pin device gear shaft and expansion pin device axle overlap, clutch block left side, a left side is provided with described thimble and expands the line pin, the side is connected and fixed a dog link, left side clutch block can horizontally slip on expansion pin device axle, right clutch block is connected and fixed with expanding pin device gear, can rotate on expansion pin device axle; Expanding pin device shell is the cylinder of left end opening right-hand member sealing, its axle overlaps with expansion pin device axle, the side is provided with a big U-shaped breach and a little U-shaped breach of left-hand opening, little U-shaped gap width and dog link thickness coupling, dog link stretches out little U-shaped breach, and expansion pin device gear parts exposes big U-shaped breach and meshes with the lower shaft roller gear.

As preferably, described bottom line tube axle cross section is non-circular, expands to expand the pin device in the pin device axle to occupy the part cross section rounded, and other part cross sections are non-circular, and the radius of circular cross section equals the external diameter of spring, and bottom line tube axle and expand pin device axle abutting end and all be taper.

As preferably, described Sewing machines also comprises a rag knife, and rag knife is connected and fixed on right side, shank lower end by trip bolt, knife face and the edge of a knife parallel with eedle down, rag knife moves downward in the right side needle plate slot that can stretch on the needle plate with shank.

As preferably, described Sewing machines comprises that also one lacks wire break alarm device, and warning device comprises by the power supply of lead series connection, siren, lacks broken string trigger and device switch.

As preferably, described scarce broken string trigger is the insulating part that has through hole, is provided with contacted sheet metal and elastic metallic yarn in the through hole, and wire one end volume has a ring, and the other end and insulating part are connected and fixed.

The utility model in use, on the bottom line cylinder base, put commercially available line tube and just can be used as the line source of bottom line, its front end was mutually away from expansion when expansion pin device can make thimble and expand the motion of line pin left-hand, its front end was drawn close contraction mutually when perhaps dextrad was moved, thimble and expand in the line pin expansion process three pins and penetrate in the planar coil and planar coil is placed on three pins, thimble and expand that planar coil comes off from three pins in the line pin contraction process.Transmission mechanism drives when expanding line apparatus expansion upper thread, planar coil is placed on three pins, driving push-pull device at fixed simultaneously moves from leftmost side starting point dextrad by draw ring pulling bottom line cylinder base, perhaps, when driving expansion line apparatus loosens upper thread, driving push-pull device at fixed simultaneously moves from rightmost side terminal point left-hand by throw-out collar promotion bottom line cylinder base: when throw-out collar dextrad moved to planar coil next-door neighbour right side, the planar coil of expansion still was positioned at the throw-out collar top; When bottom line cylinder base dextrad moved to planar coil next-door neighbour left side, planar coil has been extended to can hold the line tube in interior; When push-pull device at fixed moved to the low order end terminal point, planar coil was extended to maximum, expanded line apparatus and reached the expansion terminal point, and planar coil is between draw ring and bottom line cylinder base at this moment, and the bottom line on the line tube has passed planar coil; Throw-out collar and draw ring begin left-hand and move then, expanding line apparatus simultaneously begins to shrink, the left-hand motion is the contrary motion of dextrad motion, move at the throw-out collar left-hand and to contact with the bottom line cylinder base and promote before bottom line cylinder base left-hand moves, planar coil has made under the pulling function of thread take-up tension lever and has expanded the distortion of line pin and come off and shrink with the bottom line the coil from three pins, until being contracted to the cloth place, finishing a threading knotting of upper thread and bottom line and make process.

When being provided with rag knife, rag knife moves up and down with shank, and stretch into back and forth up and down and withdraw from needle plate right side needle plate slot and cut, when cloth moves forward in the motion along with feed dog, rag knife just can a cutter impose uniformity without examining individual cases moving and the most unnecessary cloth corner on needle plate slot right side cut away.

When being provided with when lacking wire break alarm device, bottom line at first from the line tube by lacking the broken string trigger, lack the broken string trigger and when lacking broken string, connect siren, remind the operative employee in time to shut down.When scarce broken string trigger is described insulating part, sheet metal is connected the warning device circuit respectively into and out of line with wire, form a construction of switch, bottom line at first passes through hole and passes ring on the wire from the line tube, bottom line is in tensioned state in the Sewing machines work, and wire and sheet metal are broken away from, in case bottom line lacks broken string, wire contacts with the sheet metal reinstatement, thereby connect circuit siren is reported to the police.

The beneficial effects of the utility model are: directly use the line source of commercially available line tube as bottom line, also need not special coiling, improved the line amount of bottom line greatly, saved conversion time, effectively improved operating efficiency.More can be when making when being provided with rag knife a step operation be about to the unnecessary corner of cloth and cut away, increase work efficiency; When being provided with when lacking wire break alarm device, on goods, produce a large amount of empty needle holes in the time of more can avoiding lacking broken string, because for particular product such as leatherware, in case the empty needle hole is too much, leatherware has just been scrapped.

Description of drawings

Fig. 1 is the schematic perspective view of the utility model embodiment;

Fig. 2 is another visual angle stereogram of Fig. 1;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 removes schematic perspective view behind the strutbeam for Fig. 1;

Fig. 5 removes schematic perspective view behind the strutbeam for Fig. 2;

Fig. 6 removes schematic perspective view behind the strutbeam for Fig. 3;

Fig. 7 is for expanding the schematic perspective view of each part of pin device;

Fig. 8 is for expanding the installation diagram of pin device;

Fig. 9 is the schematic diagram of rag knife and associated components;

Figure 10 is for lacking the structural representation of broken string trigger;

Figure 11 is the use schematic diagram of the utility model embodiment.

The specific embodiment

As a kind of embodiment of the present utility model, shown in Fig. 1 to 10, the intelligent Sewing machines that a kind of bottom line is durable, comprise the original shank 1 of ordinary sewing machine, eedle 2, the needle plate 32 of eedle 2 belows, intersects and drive the vertical pivot 3 of rotation with horizontal axle 42 stereo cross of going up by it, intersect with vertical pivot 3 stereo cross and drive the horizontal lower shaft 4 that rotates by it, last axle 42 links to each other with the power-actuated Sewing machines driving wheel 43 of Sewing machines and is rotated by its drive, also comprise bottom line line tube push-pull device at fixed, comprise vertical pivot 3 and lower shaft 4 at interior transmission mechanism, the thread take-up tension lever 5 that expands line apparatus and mate with the expansion line apparatus, line apparatus is expanded in the transmission mechanism driving and push-pull device at fixed is synchronized with the movement; Push-pull device at fixed comprises the vertically horizontal bottom line tube axle 6 of below setting of lower shaft 4, expand the draw ring 8 that wears successively from left to right on pin device axle 7 and the bottom line tube axle 6, bottom line cylinder base 9 and throw-out collar 10, bottom line tube axle 6 and expand that pin device axle 7 is located along the same line and the space that forms is positioned at the vertical below of eedle 2 between the two, bottom line tube axle 6 and expansion pin device axle 7 are fixed on the strutbeam of fixing with former Sewing machines 40, draw ring 8 and bottom line cylinder base 9 contact, leave the space between bottom line cylinder base 9 and the throw-out collar 10, draw ring 8, bottom line cylinder base 9 and throw-out collar 10 can and expand left and right sides smooth sliding on the pin device axle 7 at bottom line tube axle 6; Expand line apparatus and comprise the expansion pin device shell 38 that is fixed in the left end opening that expands pin device axle 7 right parts, expand the expansion pin device that can horizontally slip that wears on the pin device axle 7 thereon and be located at and expand on the pin device left side around expanding pin device axle 7 distributions triangular in shape and expanding line pins 13 from expanding the thimble 12 and two that pin device shell 38 openings stretch out, thimble 12 be provided with spring structure can about flexible, expanding line pin 13 is the elasticity pin, the bottom is provided with the torsion spring structure with expansion pin device active connection place makes it tightly lean to edge in expanding pin device shell 38 openings all the time, the torsion spring structure that expands line pin 13 is common structure: expand line pin 13 lower ends and be provided with an axle that is installed with torsion spring, torsion spring iron wire two ends are against respectively to be expanded on line pin 13 and the expansion pin device, make and expand line pin 13 and expand the trend that keeps expansion between the pin device, as common file, torsion spring structure in the clothes peg etc., the spring of thimble 12 and expansion line pin 13 and the material of torsion spring should be selected toughness material preferably for use, to adapt to the deformation-recovery action of upper frequency, and two expansion line pins, 13 tips intersected at a point with thimble 12 front ends when expansion pin device was positioned at its stroke low order end, three needle tips can intersect at a point, perhaps have a groove or through hole at thimble 12 front ends, two expand line pins 13 tips stretches in the groove or in the through hole, upper thread pin hole the needle plate 32 from the Sewing machines panel is worn for 45 times, pass the line hole of eedle 2 again, from needle plate 32 pin holes 45, wear again at last and wear back, form a planar coil 14, right side and tip direction that thimble 12 tips are in close proximity to the planar coil 14 that upper thread and eedle 2 line holes form intersect with planar coil 14 circle faces, and the space that surrounds in the middle of three pins can hold cover all the time and reach the standard grade a bottom line cylinder base 9 of tins 39 in it.Described transmission mechanism comprises vertical pivot 3, lower shaft 4, the horizontal vertical pivot power transmission shaft 15 that lower shaft 4 vertical belows are provided with and the drive sprocket axle 16 of vertical direction, the horizontally disposed driving wheel 17 that gear that each between centers cooperates and vertical pivot power transmission shaft 15 and vertical pivot 3 lower ends are connected and fixed respectively, lower shaft 4 left parts are provided with lower shaft roller gear 18, two ends, vertical pivot power transmission shaft 15 left and right sides are provided with the left bevel gear 19 and the right bevel gear 20 of left and right sides mirror image symmetry, drive sprocket axle 16 lower ends are provided with the drive sprocket axle bevel gear 21 with left bevel gear 19 engagements, vertical pivot 3 bottoms are provided with the vertical pivot bevel gear 22 with right bevel gear 20 engagements, the same position of two driving wheels 17 is connected by chain bar 23 with throw-out collar 10 with draw ring 8 separately dividually, chain bar 23 flexibly connects with the slip rail 41 that can horizontally slip on strutbeam 40, make draw ring 8 and throw-out collar 10 and expand left and right sides smooth sliding on the pin device axle 7 at bottom line tube axle 6, cycle rotation drive draw ring 8 and throw-out collar 10 move back and forth at bottom line tube axle 6 with about expanding on the pin device axle 7 two driving wheels 17 synchronously in the same way in the same way synchronously.Described expansion pin device is by being arranged in the spring 24 that expands on the pin device axle 7 from left to right successively, clutch block and expansion pin device gear 25 are formed, clutch block is cylinder, being blocked the left clutch block 26 and the right clutch block 27 that form by cylinder by an arcwall face vertical side forms, cylinder axis, expanding pin device gear shaft overlaps with expansion pin device axle 7, clutch block 26 left sides, a left side are provided with described thimble 12 and expand line pin 13, the side is connected and fixed a dog link 28, left side clutch block 26 can horizontally slip on expansion pin device axle 7, right clutch block 27 is connected and fixed with expanding pin device gear 25, can expand rotation on the pin device axle 7; Expanding pin device shell 38 is the cylinder of left end opening right-hand member sealing, its axle overlaps with expansion pin device axle 7, the side is provided with a big U-shaped breach 29 and a little U-shaped breach 30 of left-hand opening, little U-shaped breach 30 width and dog link 28 thicknesses coupling, dog link 28 stretches out little U-shaped breach 30, by dog link 28 left clutch block 26 can't be rotated, can only on expansion pin device axle 7, laterally horizontally slip along the U-shaped breach, expand pin device gear 25 parts expose rectangular aperture and with 18 engagements of lower shaft roller gear, drive and the pressure of spring 24 can only rotate it and can not laterally horizontally slip by lower shaft roller gear 18.Described bottom line tube axle 6 cross sections are non-circular, be square in the present embodiment, expand and to expand the pin device in the pin device axle 7 to occupy the part cross section rounded, other part cross sections are non-circular, the non-circular bottom line cylinder base 9 that makes can't and expand pin device axle 7 and roll at bottom line tube axle 6, and can only left and right sides smooth sliding, be square in the present embodiment, the radius of circular cross section equals the external diameter of spring 24, make spring 24 can not hinder bottom line cylinder base 9 and draw ring 8 and throw-out collar 10 and expanding being free to slide on the pin device axle 7, and bottom line tube axle 6 all is taper with expansion pin device axle 7 abutting ends.Described Sewing machines also comprises a rag knife 31, rag knife 31 is connected and fixed on right side, shank 1 lower end by trip bolt, can unscrew screw at any time and change rag knife 31, the parallel and edge of a knife of knife face and eedle 2 down, rag knife 31 moves downward in the right side needle plate slot 33 that can stretch on the needle plate 32 with shank 1.Can be according to the presser feet of rag knife 31 thickness replacing with its coupling, rag knife 31 moves up and down with shank 1, and stretch into back and forth up and down and withdraw from eedle 2 below needle plates 32 right side needle plate slots 33 and cut, when cloth moves forward in the motion along with feed dog, rag knife 31 just can a cutter one cutter cut forward bit by bit and the most unnecessary cloth corner on right side needle plate slot 33 right sides cut away.Described Sewing machines comprises that also one lacks wire break alarm device, and warning device comprises by the power supply of lead series connection, siren, lacks broken string trigger and device switch.Described scarce broken string trigger is the insulating part that has through hole 34, is provided with contacted sheet metal 35 and elastic metallic yarn 36 in the through hole 34, and wire 36 1 ends volume has a ring 37, and the other end and insulating part are connected and fixed.Bottom line at first passes through to lack the broken string trigger from line tube 39, lacks the broken string trigger and connect siren when scarce broken string, reminds the operative employee in time to shut down.Lacking the broken string trigger can be a sensor, when perhaps being insulating part as shown in this embodiment, insulating part can be installed on the bottom line cylinder base 9, sheet metal 35 is connected the warning device circuit respectively into and out of line with wire 36, form an equivalent construction of switch, bottom line at first passes through hole 34 and passes ring 37 on the wire 36 from line tube 39, bottom line is in tensioned state in the Sewing machines work, wire 36 and sheet metal 35 are broken away from, in case bottom line lacks broken string, wire 36 contacts with sheet metal 35 reinstatements, thereby connect circuit siren is reported to the police.The device switch is located at Sewing machines panel or other handled easilies worker's place, because bottom line is not tightened under the initial situation, wire 36 is a contact condition with sheet metal 35, siren is in alarm condition, so answer the shutoff device switch before the Sewing machines start, treat that Sewing machines start back bottom line tightens when wire 36 and sheet metal 35 are broken away from device for opening switch again.Also the device switch can cut out after reporting to the police or when changing bottom line line tube 39, with interruption-free other people.

The utility model in use, on bottom line cylinder base 9, put commercially available line tube 39 and just can be used as the line source of bottom line, thimble 12 be provided with spring structure can about flexible, thimble 12 is fixed on the left clutch block 26, expanding line pin 13 is the elasticity pin, the bottom is provided with the torsion spring structure with expansion pin device active connection place makes it tightly lean to edge in expanding pin device shell 38 openings all the time, expanding line pin 13 flexibly connects and can swing back and forth on left clutch block 26, but because the active force of torsion spring makes it lean to edge in the opening that expands pin device shell 38 left ends all the time tightly, lower shaft roller gear 18 drives and expands 25 rotations of pin device gear, thereby the right clutch block 27 that drive and expansion pin device gear 25 are connected rotates, because special contact-making surface between the left and right sides clutch block 27, right clutch block 27 rotations 0 to 180 promote left clutch block 26 left-hands when spending and move, spring 24 by left clutch block 26 front portions when rotation 180 to 360 is spent moves left clutch block 26 promotion dextrad, left side clutch block 26 left-hands drive thimble 12 and expand line pin 13 left-hands and move when moving, effect by thereon torsion spring structure when expanding line pin 13 left-hands and move is being pasted in expansion pin device shell 38 openings along stretching laterally it, form the motion of expansion while moving to left, opposite during the dextrad motion, shrink while moving to right.Its front end was mutually away from expansion when expansion pin device can make thimble 12 and expand the motion of line pin 13 left-hands, its front end was drawn close contraction mutually when perhaps dextrad was moved, two expansion line pins, 13 tips intersected at a point with thimble 12 front ends when expansion pin device was positioned at its stroke low order end, it is crossing with planar coil 14 circle faces that thimble 12 tips are in close proximity to the right side and the tip direction of the planar coil 14 that upper thread and eedle 2 line holes form, thimble 12 and expand line pin 13 left-hands and move in the planar coil 14 that three pins in the expansion process penetrate the left side next-door neighbour and planar coil 14 is placed on three pins, thimble 12 is blocked by the feed dog mechanism in planar coil 14 left sides and shrinks, expanding line pin 13 continues to move to left and enlarge, simultaneously planar coil 14 is enlarged synchronously, planar coil 14 comes off from three pins in thimble 12 and expansion line pin 13 contraction processes.Transmission mechanism drives when expanding line apparatus expansion upper thread, driving push-pull device at fixed simultaneously moves from leftmost side starting point dextrad by draw ring 8 pulling bottom line cylinder base 9, perhaps, when driving expansion line apparatus loosens upper thread, driving push-pull device at fixed simultaneously promotes bottom line cylinder base 9 by throw-out collar 10 and moves from rightmost side terminal point left-hand, when push-pull device at fixed is positioned at its stroke high order end point, expand the line device and be positioned at its stroke low order end point, thimble 12 and expansion line pin 13 are contracted to any and are positioned at its stroke low order end point, when push-pull device at fixed is positioned at its stroke low order end point, expand the line device and be positioned at its stroke high order end point, thimble 12 and expansion line pin 13 are extended to maximum and are positioned at its stroke high order end point, as shown in figure 10: and initial position, shown in A among Figure 10, when push-pull device at fixed is positioned at its stroke high order end point, expand the line device and be positioned at its stroke low order end point, thimble 12 and expansion line pin 13 are contracted to a bit and are positioned at its stroke low order end point, and three pins are close to planar coil 14 right sides, further again, three pins penetrate planar coil 14 and the expansion while moving to left; First critical point, shown in B among Figure 10, when throw-out collar 10 dextrad move to planar coil 14 next-door neighbour right sides, the planar coil 14 that three pins of being expanded enlarge still is positioned at throw-out collar 10 tops, further again, planar coil 14 continues to enlarge and the position between bottom line cylinder base 9 and throw-out collar 10, prepares for bottom line line tube 39 penetrates planar coil 14; Second critical point, shown in C among Figure 10, when bottom line cylinder base 9 dextrad moved to planar coil 14 next-door neighbour left sides, planar coil 14 has been extended to can hold line tube 39 in interior, further bottom line cylinder base 9 is being with bottom line line tube 39 to penetrate in the planar coil 14 again, for upper thread and bottom line 44 knottings are prepared; The 3rd critical point, shown in D among Figure 10, when push-pull device at fixed moves to the low order end stroke end, planar coil 14 is extended to maximum, expanding line apparatus reaches the expansion terminal point and is positioned at its stroke high order end point, finish the left-hand moving process and promptly finish the half cycles process, planar coil 14 is between draw ring 8 and bottom line cylinder base 9 at this moment, and the bottom line 44 on the line tube 39 has passed planar coil 14; The 4th critical point then, shown in E among Figure 10, throw-out collar 10 and draw ring 8 beginning left-hands move, expanding line apparatus simultaneously begins to shrink, the left-hand motion is the contrary motion of dextrad motion, move at throw-out collar 10 left-hands and to contact with bottom line cylinder base 9 and promote before bottom line cylinder base 9 left-hands move, planar coil 14 has made under the pulling function of thread take-up tension lever 5 and has expanded 13 distortion of line pin and come off and shrink with the bottom line the coil 44 from three pins, until being contracted to the cloth place, finishing a threading knotting of upper thread and bottom line 44 and make process.Because the planar coil 14 after the expansion is shunk, so thread take-up tension lever 5 need be longer than common thread take-up tension lever, three pins are with the planar coil 14 maximum line length couplings that enlarge in its length and the expansion line apparatus.

Claims (7)

1. intelligent Sewing machines that bottom line is durable, comprise shank (1), eedle (2), needle plate (32), vertical pivot (3), drive the lower shaft (4) that rotates by vertical pivot (3), it is characterized in that: also comprise bottom line line tube push-pull device at fixed, comprise vertical pivot (3) and lower shaft (4) transmission mechanism, expand line apparatus and and expand the thread take-up tension lever (5) of line apparatus coupling, transmission mechanism drives and expands line apparatus and push-pull device at fixed is synchronized with the movement; Push-pull device at fixed comprises the vertically horizontal bottom line tube axle (6) of below setting of lower shaft (4), expand the draw ring (8) that wears successively from left to right on pin device axle (7) and the bottom line tube axle (6), bottom line cylinder base (9) and throw-out collar (10), bottom line tube axle (6) and expand that pin device axle (7) is located along the same line and the space that forms is positioned at the vertical below of eedle (1) between the two, draw ring (8) and bottom line cylinder base (9) contact, leave the space between bottom line cylinder base (9) and the throw-out collar (10), draw ring (8), bottom line cylinder base (9) and throw-out collar (10) can and expand pin device axle (7) and go up left and right sides smooth sliding at bottom line tube axle (6); Expand line apparatus and comprise the expansion pin device shell (38) that is fixed in the left end opening that expands pin device axle (7) right part, expand the expansion pin device that can horizontally slip that wears on the pin device axle (7) thereon and be located at and expand on the pin device left side around expanding pin device axle (7) distribution triangular in shape and from expanding a thimble (12) and the two expansion line pins (13) that pin device shell (38) opening stretches out, thimble (12) be provided with spring structure can about flexible, expanding line pin (13) is the elasticity pin, its bottom is provided with the torsion spring structure with expansion pin device active connection place makes it tightly lean to edge in expanding pin device shell (38) opening all the time, and two expansion line pins (13) were most advanced and sophisticated when expansion pin device was positioned at its stroke low order end intersects at a point with thimble (12) front end, right side and tip direction that thimble (12) tip is in close proximity to the planar coil (14) that upper thread and eedle (2) line hole form intersect with planar coil (14) circle face, and the space that surrounds in the middle of three pins can hold cover all the time and reach the standard grade the bottom line cylinder base (9) of tin (39) in it.

2. the intelligent Sewing machines that a kind of bottom line according to claim 1 is durable, it is characterized in that: described transmission mechanism comprises vertical pivot (3), lower shaft (4), the horizontal vertical pivot power transmission shaft (15) that the vertical below of lower shaft (4) is provided with and the drive sprocket axle (16) of vertical direction, the horizontally disposed driving wheel (17) that gear that each between centers cooperates and vertical pivot power transmission shaft (15) and vertical pivot (3) lower end are connected and fixed respectively, lower shaft (4) left part is provided with lower shaft roller gear (18), vertical pivot power transmission shaft (15) two ends, the left and right sides are provided with the left bevel gear (19) and the right bevel gear (20) of left and right sides mirror image symmetry, drive sprocket axle (16) lower end is provided with the drive sprocket axle bevel gear (21) with left bevel gear (19) engagement, vertical pivot (3) bottom is provided with the vertical pivot bevel gear (22) with right bevel gear (20) engagement, and the same position of two driving wheels (17) is connected by chain bar (23) with throw-out collar (10) with draw ring (8) separately dividually.

3. the intelligent Sewing machines that a kind of bottom line according to claim 2 is durable, it is characterized in that: described expansion pin device is by being arranged in the spring (24) that expands on the pin device axle (7) from left to right successively, clutch block and expansion pin device gear (25) are formed, clutch block is cylinder, being blocked the left clutch block (26) and the right clutch block (27) that form by cylinder by an arcwall face vertical side forms, cylinder axis, expanding pin device gear shaft overlaps with expansion pin device axle (7), clutch block (26) left side, a left side is provided with described thimble (12) and expands line pin (13), the side is connected and fixed a dog link (28), left side clutch block (26) can horizontally slip on expansion pin device axle (7), right clutch block (27) is connected and fixed with expanding pin device gear (25), can go up at expansion pin device axle (7) and rotate; Expand the cylinder that pin device shell (38) is the sealing of left end opening right-hand member, its axle overlaps with expansion pin device axle (7), the side is provided with a big U-shaped breach (29) and a little U-shaped breach (30) of left-hand opening, little U-shaped breach (30) width and dog link (28) thickness coupling, dog link (28) stretches out little U-shaped breach (30), and expansion pin device gear (25) part is exposed big U-shaped breach (29) and meshed with lower shaft roller gear (18).

4. the intelligent Sewing machines that a kind of bottom line according to claim 3 is durable, it is characterized in that: described bottom line tube axle (6) cross section is non-circular, it is rounded that the middle expansion of expansion pin device axle (7) pin device occupies the part cross section, other part cross sections are non-circular, the radius of circular cross section equals the external diameter of spring (24), and bottom line tube axle (6) and expand the adjacent termination of pin device axle (7) and all be taper.

5. according to the durable intelligent Sewing machines of a kind of bottom line described in arbitrary claim in the claim 1 to 4, it is characterized in that: described Sewing machines also comprises a rag knife (31), rag knife (31) is connected and fixed on shank (1) right side, lower end by trip bolt, knife face and the edge of a knife parallel with eedle (2) down, rag knife (31) moves downward in the right side needle plate slot (33) that can stretch on the needle plate (32) with shank (1).

6. the intelligent Sewing machines that a kind of bottom line according to claim 5 is durable is characterized in that: described Sewing machines comprises that also one lacks wire break alarm device, and warning device comprises by the power supply of lead series connection, siren, lacks broken string trigger and device switch.

7. the intelligent Sewing machines that a kind of bottom line according to claim 6 is durable, it is characterized in that: described scarce broken string trigger is for having the insulating part of through hole (34), be provided with contacted sheet metal (35) and elastic metallic yarn (36) in the through hole (34), wire (36) one ends volume has a ring (37), and the other end and insulating part are connected and fixed.

Images