CN214736542U - Hook needle feeding transmission structure of high-head sewing machine - Google Patents

Abstract

The utility model relates to a high first sewing machine crochet hook pay-off transmission structure, this transmission structure includes high first frame, a pedestal, the transmission part, main design lies in that its crochet hook transmission subassembly includes crochet hook owner swing drive mechanism and the vice swing drive mechanism of crochet hook, crochet hook owner swing drive mechanism includes crochet hook, crochet hook swing seat, go up swing crank, luffing motion connecting rod, lower swing regulating plate, lower balance shaft, bulb swing cover, bulb sway the pull rod, bulb swing leading truck, the vice swing drive mechanism of crochet hook includes vice swing support, vice swing song. Through linking each part, realized this high-head sewing machine's crochet hook double-swing function, the crochet hook can be along articulated department pendulum commentaries on classics promptly, can wholly form for sewing machine eedle both sides and sway again, realizes better sewing operation, guarantees sewing quality and effect.

Description

Hook needle feeding transmission structure of high-head sewing machine

Technical Field

The utility model relates to a sewing machine, in particular to a crochet hook feeding transmission structure of a high-head sewing machine.

Background

The high-head sewing machine is also called a high-head vehicle, and compared with a common flat sewing machine, the high-head sewing machine is mainly characterized in that a working surface is a sewing table which is arranged in a protruding mode along the height direction, and the high-head sewing machine is mainly convenient for the operation that shoes, bags and the like need to stretch into and sew. The difference between the transmission structure of the conventional high-head vehicle and the transmission structure of the conventional flat bed sewing machine is large, so that a manufacturer can generally carry out brand new design on the transmission part aiming at the requirement of the high-head vehicle, the design cost of the manufacturer is obviously greatly increased, and a plurality of high-head vehicles are greatly changed compared with the flat bed sewing machine due to the sewing transmission mode, so that the original sewing mode or function of the flat bed sewing machine is caused, the high-head vehicles are difficult to realize, and the sewing effect and the quality are not good. For this reason, improvement of the existing high-head vehicle is yet to be made.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide a high-head sewing machine crochet hook pay-off transmission structure to the field, so that the problem that the existing similar sewing machine is difficult to improve the production on the basis of a flat sewing machine is solved, the input cost is high, and the sewing quality is difficult to guarantee. The purpose is realized by the following technical scheme.

The utility model provides a high first sewing machine crochet hook pay-off transmission structure, this transmission structure includes high first frame, base, transmission part, and high first frame bottom is fixed in the base, high first frame top fixed connection faller, and transmission part's main shaft is the lower shaft, and the lower shaft passes through synchronous gear, drive belt and is connected with high first sewing machine's last main shaft transmission, and transmission part includes crochet hook transmission subassembly and pay-off tooth transmission subassembly. The structure is characterized in that the crochet hook transmission component comprises a crochet hook main swing transmission mechanism and a crochet hook auxiliary swing transmission mechanism, the crochet hook main swing transmission mechanism comprises a crochet hook, a crochet hook swing seat, an upper swing crank, an up-down swing connecting rod, a lower swing adjusting plate, a lower swing shaft, a ball head swing sleeve, a ball head swing pull rod and a ball head swing guide frame, the crochet hook auxiliary swing transmission mechanism comprises an auxiliary swing support and an auxiliary swing crank, the crochet hook is positioned below the needle plate at the top of the high head machine base, the crochet hook is fixed on a crochet hook swinging seat, the crochet hook swinging seat is fixedly connected with one end of an upper swinging crank, the other end of the upper swinging crank is movably hinged with one end of an upper swinging connecting rod, the other end of the upper swinging connecting rod is movably hinged with one end of a lower swinging adjusting plate, the other end of the lower swinging adjusting plate is fixedly connected with a lower swinging shaft, the lower swinging shaft is rotatably positioned on a swinging seat at the bottom of the auxiliary swinging support, the hinge axes of each movable hinge part in the main swing transmission mechanism are parallel to the axial direction of the lower swing shaft; one end of the ball head swinging sleeve is fixedly sleeved on the lower swinging shaft, the other end of the ball head swinging sleeve is provided with a ball head and a rod end, the ball head of the ball head swinging sleeve is movably connected in a round sleeve hole at the lower part of the ball head swinging pull rod, the upper part of the ball head swinging pull rod is movably sleeved on the lower shaft and provided with an eccentric ball rod part, the rod end of the ball head swinging sleeve extends out of the round sleeve hole to be matched with a guide chute arranged on the ball head swinging guide frame, the guide chute is used for guiding the ball head swinging sleeve to swing along with the lower swinging shaft, and the ball head swinging guide frame is fixed on the ball head swinging pull rod; the upper end of the auxiliary swing support is movably hinged with a shaft lever part of the upper swing crank fixed crochet hook swing seat, namely the crochet hook swing seat swings with the upper swing crank and rotates relative to the upper end of the auxiliary swing support, the middle part of the auxiliary swing support is hinged and positioned on one side of the high head machine base and swings, the lower part of the auxiliary swing support is movably hinged close to the lower swing shaft, one end of the auxiliary swing crank is movably hinged, the hinged axis of the auxiliary swing support is parallel to the lower shaft, and the other end of the auxiliary swing crank is fixedly provided with an eccentric swing sleeve and movably sleeved on the lower shaft through the eccentric swing sleeve. Through above-mentioned transmission structure, the crochet hook double-swing function of having reserved current flush joint machine, the crochet hook can be along articulated department pendulum commentaries on classics promptly, can wholly form for sewing machine eedle both sides and sway again, realizes better sewing operation, guarantees sewing quality and effect.

And a bar-shaped sliding hole A matched with the hinged position for adjustment is arranged at the movable hinged position of the up-down swinging connecting rod and the down-swinging adjusting plate. Through the structure, the hinged position of the upper swing connecting rod and the lower swing adjusting plate can be conveniently adjusted, so that the transmission force arm is changed, and the adjustment of the swing and rotation amplitude of the crochet hook is realized.

The lower swing adjusting plate is fixed with one end of the lower swing shaft through a screw, and a strip-shaped sliding hole B matched with the screw for fixing position adjustment is formed in the end of the lower swing adjusting plate. Through the structure, the force arm adjustment of the lower swing adjusting plate and the lower swing shaft is facilitated, and the adjustment of the swing and rotation amplitude of the crochet hook is further realized.

And a strip-shaped sliding hole C matched with the hinge position for adjustment is formed in the movable hinge joint of the auxiliary swing support and the auxiliary swing crank. Through the structure, the hinged position of the auxiliary swing support and the auxiliary swing crank is conveniently adjusted, so that the power transmission arm is changed, and the adjustment of the lateral swing amplitude of the hook needle integrally along with the auxiliary swing support is realized.

The feeding tooth transmission component comprises a front feeding tooth, a rear feeding tooth, a front feeding tooth swing rod, a rear feeding tooth swing rod, a front feeding tooth rack, a rear feeding tooth rack, a front guide slide block, a rear positioning slide block, an eccentric wheel group, an eccentric wheel swing rack, a rear positioning swing shaft, a linkage pull rod and a pull rod pin, wherein the front feeding tooth and the rear feeding tooth are both positioned below a needle plate in the high head base, the front feeding tooth is fixed with the top of the front feeding tooth swing rod, the rear feeding tooth is fixed with the top of the rear feeding tooth swing rod, the middle parts of the front feeding tooth swing rod and the rear feeding tooth swing rod are respectively and correspondingly provided with a front feeding tooth rectangular guide slide hole and a rear feeding tooth rectangular guide slide hole, a front slide block is arranged in the front feeding tooth rectangular guide slide hole, a rear slide block is arranged in the rear feeding tooth rectangular guide slide hole, and the front slide block and the rear slide block are coaxially positioned on a hinge seat in the high head base to swing, the bottom of the front feeding tooth swing rod is movably hinged with one end of a front feeding tooth rack, the bottom of the rear feeding tooth swing rod is movably hinged with one end of a rear feeding tooth rack, the front feeding tooth rack and the rear feeding tooth rack are both positioned in the base, one side of the front feeding tooth rack is abutted against one side of the rear feeding tooth rack, the front ends of the front feeding tooth rack and the rear feeding tooth rack are provided with front sliding holes matched with the sliding of the front guide sliding block, the rear ends of the front feeding tooth rack and the rear feeding tooth rack are provided with rear sliding holes matched with the sliding of the rear positioning sliding block, the front guide sliding block is movably sleeved and positioned on an eccentric shaft section A arranged on the lower shaft, the rear positioning sliding block is swung and positioned on the base, the lower shaft is provided with an eccentric shaft section B and is sleeved and provided with an eccentric wheel set through the eccentric shaft section B, the outer diameter of an eccentric wheel set is sleeved and connected with a gear ring, the outer diameter of the gear ring is sleeved and arranged in a sleeve hole at one end of the eccentric wheel swing rack 31, one side of the eccentric wheel swing rack is provided with a sliding port, a sliding shaft block is arranged in the sliding opening, and the shaft block is in shaft connection with the rear feeding tooth rack for positioning, namely the rear feeding tooth rack reciprocates relative to the front guide sliding block and the rear positioning sliding block when swinging along with the eccentric wheel swinging rack; the eccentric wheel swing span other end activity is articulated the swing arm that back location oscillating axle was equipped with, and back location oscillating axle pendulum changes and is located the base, and back location oscillating axle axial region is equipped with along the arc linkage arm that radially sets up, linkage pull rod one end cup joints with the arc linkage arm and forms sliding fit, and the linkage pull rod other end passes through draw bar pin active positioning and connects preceding pay-off dental articulator, and follow when back location oscillating axle pendulum changes, arc linkage arm pulling linkage pull rod, linkage pull rod pulling preceding pay-off dental articulator for preceding direction slider, back location slider are reciprocating motion. Through the structure, under the premise of not changing a transmission structure in the base of the existing lockstitch sewing machine, the reciprocating swing of the front feeding tooth swing rod and the rear feeding tooth swing rod is utilized to convert the reciprocating swing of the front feeding tooth rack and the rear feeding tooth rack in the base into the reciprocating swing of the front feeding tooth and the rear feeding tooth on the top in the high-head base, so that the feeding operation as the lockstitch sewing machine is realized, and the lockstitch sewing machine is reliable and stable.

Linkage pull rod one end is equipped with the articulated sliding sleeve that is the location pendulum and changes, promptly through the sliding sleeve with the arc linkage arm of back location oscillating axle cup joints and is sliding fit, and the sliding sleeve inboard corresponds the linkage pull rod, and the sliding sleeve outside hub connection is equipped with the slider, and slider sliding fit is in the guide block that is equipped with the spout, the guide block integration be equipped with back location oscillating axle axial region sliding positioning's guide bracket, and sliding positioning's direction corresponds the radial of back location oscillating axle, and the swing arm one end is adjusted to the outside fixed connection of guide block, adjusts the swing arm other end fixed connection pendulum shaft, and the pendulum shaft activity is located the base, and the pendulum shaft outer end stretches out base fixed connection adjustment handle. Through the structure, the adjusting handle is utilized to drive the adjusting swing arm, the adjusting swing arm drives the sliding sleeve to slide relative to the arc swing arm, so that the swinging force arm of the arc swing arm is changed, namely the reciprocating pulling amplitude of the linkage pull rod driven by the rear positioning swing shaft is changed, and finally the swinging amplitude of the front feeding tooth frame is changed, namely the swinging amplitude of the front feeding tooth is changed, and differential feeding is realized.

This transmission structure still includes needle protection drive mechanism, and needle protection drive mechanism includes needle protection support, needle protection pendulum rod, transmission pendulum rod, pendulum rod crank, and needle protection support is located the faller below at high head frame top, needle protection support bottom fixed connection needle protection pendulum rod top, needle protection pendulum rod middle part with the articulated position at vice pendulum support middle part forms same articulated, and needle protection pendulum rod bottom hub connection transmission pendulum rod one end, the activity of the transmission pendulum rod other end cup joints pendulum rod crank one end, the pendulum rod crank other end are equipped with eccentric adjusting sleeve to cup joint through eccentric adjusting sleeve activity and are located the lower shaft, the transmission pendulum rod is on a parallel with the lower shaft. Through the structure, adaptive swing is formed when the needle protection support is driven along with the crochet hook transmission component, so that the purposes of protecting a needle of a sewing machine and preventing the needle from deviating from a needle path or being inclined and damaged are achieved.

And the high-head machine base is fixedly provided with a U-shaped guide seat which limits the swinging of the needle protection swing rod and the auxiliary swing bracket. Through the structure, the swinging of the needle protection swing rod and the auxiliary swinging bracket is more stable and is not easy to loosen and deviate.

The utility model discloses a reform transform the design on current flush joint machine's basis, it is lower to reform transform the cost, and transmission structure is comparatively reliable, stable, has kept current flush joint machine's original function, has guaranteed sewing quality and effect, is fit for the high first sewing machine use as shoes, package class, or reforms into the improvement structure use of high first machine as current flush joint machine.

Drawings

Fig. 1 is a first schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention, and a part of the structure is omitted in the figure.

Fig. 3 is a schematic structural diagram of the transmission part of the present invention.

Fig. 4 is a schematic structural diagram of the transmission part of the present invention.

Fig. 5 is a third schematic structural diagram of the transmission part of the present invention.

Fig. 6 is a schematic structural diagram of the transmission part of the present invention.

Fig. 7 is a schematic structural view of the bearded needle transmission part of the present invention.

Fig. 8 is an exploded view of the bearded needle transmission part of the present invention.

Fig. 9 is a schematic structural view of the feeding transmission part of the present invention.

Fig. 10 is an exploded view of the feed drive of the present invention.

The sequence numbers and names in the figure are: 1. a base, 2, a high head machine base, 201, a hinged base, 202, a U-shaped guide base, 3, an upper main shaft, 4, a lower shaft, 401, an eccentric shaft section A, 402, an eccentric shaft section B, 403, an eccentric ball rod part, 5, a needle plate, 6, a crochet needle, 7, a needle guard bracket, 8, a needle guard swing rod, 9, a transmission swing rod, 10, a swing rod crank, 1001, an eccentric adjusting sleeve, 11, a crochet needle swing base, 12, an upper swing crank, 13, an auxiliary swing bracket, 1301, a strip-shaped sliding hole C, 14, an auxiliary swing crank, 1401, an eccentric swing sleeve, 15, a swing base, 16, an upper and lower swing connecting rod, 1601, a strip-shaped sliding hole A, 17, a lower swing adjusting plate, 1701, an adjusting sliding hole B, 18, a lower swing shaft, 19, a swing sleeve, 1901, a ball head, 1902, a rod end, 20, a ball head swing guide bracket, 2001, a guide chute, 21, a swing pull rod, 22, a front feeding tooth, 23 and a rear feeding tooth, 24. front feeding tooth swing rods, 2401, front feeding tooth rectangular guide sliding holes, 2402, front sliding blocks, 25, rear feeding tooth swing rods, 2501, rear feeding tooth rectangular guide sliding holes, 2502, rear sliding blocks, 26, front feeding tooth racks, 2601, front sliding holes, 27, rear feeding tooth racks, 2701, rear sliding holes, 28, front guide sliding blocks, 29, rear positioning sliding blocks, 30, eccentric wheel sets, 3001, needle roller gear rings, 31, eccentric wheel swing racks, 3101, sliding openings, 3102, shaft blocks, 32, rear positioning swing shafts, 3201, arc linkage arms, 3202, swing arms, 33, linkage pull rods, 3301, sliding sleeves, 3302, sliding blocks, 34, pull rod pins, 35, guide blocks, 3501, guide brackets, 36, adjusting swing arms, 37, swing shafts, 38 and adjusting handles.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

As shown in fig. 1-10, the crochet hook feeding transmission structure of the high-head sewing machine mainly comprises a high-head machine base 2, a base 1 and a transmission part, wherein the bottom of the high-head machine base is fixed on the base, the top of the high-head machine base is fixedly connected with a needle plate 5, a main shaft of the transmission part is a lower shaft 4, the lower shaft is in transmission connection with an upper main shaft 3 of the high-head sewing machine through a synchronous gear and a transmission belt, and the upper main shaft is a driving shaft of the sewing machine. The transmission part comprises a crochet hook transmission component and a feeding tooth transmission component, and the concrete structure is as follows: the crochet hook transmission component comprises a crochet hook main swing transmission mechanism and a crochet hook auxiliary swing transmission mechanism, the crochet hook main swing transmission mechanism comprises a crochet hook 6, a crochet hook swing seat 11, an upper swing crank 12, an up-and-down swing connecting rod 16, a lower swing adjusting plate 17, a lower swing shaft 18, a ball head swing sleeve 19, a ball head swing pull rod 21 and a ball head swing guide frame 20, the crochet hook auxiliary swing transmission mechanism comprises an auxiliary swing support 13 and an auxiliary swing crank 14, the crochet hook 6 is positioned below a needle plate 5 at the top of a high head machine base 2, the crochet hook 6 is fixed on the crochet hook swing seat 11, the crochet hook swing seat 11 is fixedly connected with one end of the upper swing crank 12, the other end of the upper swing crank 12 is movably hinged with one end of the up-and-down swing connecting rod 16, the other end of the up-and-down swing connecting rod 16 is movably hinged with one end of the lower swing adjusting plate 17, the other end of the lower swing adjusting plate 17 is fixedly connected with a lower swing shaft 18, the lower swing shaft 18 is rotatably positioned on a swing seat 15 at the bottom of the auxiliary swing support 13, the hinge axes of each movable hinge part in the main swing transmission mechanism are parallel to the axial direction of the lower swing shaft 18; one end of a ball head swing sleeve 19 is fixedly connected with a lower swing shaft 18 in a sleeved mode, the other end of the ball head swing sleeve 19 is provided with a ball head 1901 and a rod end 1902, the ball head 1901 of the ball head swing sleeve 19 is movably connected with a round sleeve hole in the lower portion of a ball head swing pull rod 21, the upper portion of the ball head swing pull rod 21 is movably sleeved with an eccentric ball rod portion 403 arranged on a lower shaft 5, the rod end 1902 of the ball head swing sleeve 19 extends out of the round sleeve hole to be matched with a guide sliding groove 2001 arranged on a ball head swing guide frame 20, the guide sliding groove 2001 guides the ball head swing sleeve 19 to swing along with the lower swing shaft 18, and the ball head swing guide frame 20 is fixed on the ball head swing pull rod 21. The upper end of the auxiliary swing bracket 13 is movably hinged with the shaft lever part of the upper swing crank 12 fixed crochet hook swing seat 11, namely, the crochet hook swing seat 11 swings with the upper swing crank 12 and rotates relative to the upper end of the auxiliary swing bracket 13, the middle part of the auxiliary swing bracket 13 is hinged and positioned with one side of the high head machine base 2 to swing, the lower part of the auxiliary swing bracket 13 is movably hinged with one end of an auxiliary swing crank 14 close to a lower swing shaft 18, the hinged axis of the movable hinge is parallel to the lower shaft 4, the other end of the auxiliary swing crank 14 is fixedly provided with an eccentric swing sleeve 1401, and the eccentric swing sleeve 1401 is movably sleeved on the lower shaft 4.

In order to facilitate the adjustment of the swing amplitude of the crochet hook 6 relative to the up-down swing connecting rod 16, a strip-shaped sliding hole A1601 which is matched with the adjustment of the hinge position is arranged at the movable hinge joint of the up-down swing connecting rod 16 and the lower swing adjusting plate 17. The lower swing adjusting plate 17 is fixed to one end of the lower swing shaft 18 by a screw, and the end of the lower swing adjusting plate 17 is provided with a strip-shaped sliding hole B1701 adapted to be adjusted by the screw fixing position.

In order to facilitate the adjustment of the lateral swing amplitude of the whole crochet hook 6 along with the auxiliary swing bracket 13, a strip-shaped sliding hole C1301 which is matched with the hinge position for adjustment is arranged at the movable hinge joint of the auxiliary swing bracket 13 and the auxiliary swing crank 14.

The feeding tooth transmission assembly comprises a front feeding tooth 22, a rear feeding tooth 23, a front feeding tooth swing rod 24, a rear feeding tooth swing rod 25, a front feeding tooth frame 26, a rear feeding tooth frame 27, a front guide slide block 28, a rear positioning slide block 29, an eccentric wheel set 30, an eccentric wheel swing frame 31, a rear positioning swing shaft 32, a linkage pull rod 33 and a pull rod pin 34, wherein the front feeding tooth 22 and the rear feeding tooth 23 are respectively positioned below a needle plate 5 in a high head base 2, the front feeding tooth 22 is fixed with the top of the front feeding tooth swing rod 24, the rear feeding tooth 23 is fixed with the top of the rear feeding tooth swing rod 25, the middle parts of the front feeding tooth swing rod 24 and the rear feeding tooth swing rod 25 are respectively and correspondingly provided with a front feeding tooth rectangular guide slide hole 2401 and a rear feeding tooth rectangular guide slide hole 2501, the front slide block 2402 is arranged in the front feeding tooth rectangular guide slide hole 2401, the rear slide block 2502 is arranged in the rear feeding tooth rectangular guide slide hole 2501, the front slide block 2402 is arranged in the rear slide block 2402, The rear sliding block 2502 is positioned in the hinging seat 201 in the high-head base 2 and swings, the bottom of the front feeding tooth swing rod 24 is movably hinged with one end of the front feeding tooth rack 26, the bottom of the rear feeding tooth swing rod 25 is movably hinged with one end of the rear feeding tooth rack 27, the front feeding tooth rack 26 and the rear feeding tooth rack 27 are both positioned in the base 1, one side of the front feeding tooth rack 26 abuts against one side of the rear feeding tooth rack 27, the front ends of the front feeding tooth rack and the rear feeding tooth rack are provided with front sliding holes 2601 matched with the front guide sliding blocks 28 to slide, the rear ends of the front feeding tooth rack and the rear feeding tooth rack are provided with rear sliding holes 2701 matched with the rear positioning sliding blocks 29 to slide, the front guide sliding blocks 28 are movably sleeved and positioned on eccentric shaft sections A401 arranged on the lower shaft 4, and the rear positioning sliding blocks 29 swing and are positioned on the base 1. The lower shaft 4 is provided with an eccentric shaft section B402, an eccentric wheel set 30 is sleeved and connected through the eccentric shaft section B402, the outer diameter of the eccentric wheel surface of the eccentric wheel set 30 is sleeved and connected with a needle ring gear 3001, the outer diameter of the needle ring gear 3001 is sleeved and connected in a sleeve hole at one end of an eccentric wheel swing frame 31, one side of the eccentric wheel swing frame 31 is provided with a sliding port 3101, a sliding shaft block 3102 is arranged in the sliding port 3101, the shaft block 3102 is in shaft connection and positioning with the rear feeding tooth frame 27, namely, the rear feeding tooth frame 27 reciprocates relative to the front guide sliding block 28 and the rear positioning sliding block 29 when swinging along with the eccentric wheel swing frame 31; the other end of the eccentric wheel swing frame 31 is movably hinged with a swing arm 3202 arranged on the rear positioning swing shaft 32, the rear positioning swing shaft 32 swings and is positioned on the base 1, the shaft part of the rear positioning swing shaft 32 is provided with an arc linkage arm 3201 arranged in the radial direction, one end of the linkage pull rod 33 is in sleeved sliding fit with the arc linkage arm 3201, the other end of the linkage pull rod 33 is movably positioned and connected with the front feeding tooth frame 26 through a pull rod pin 34, and when the positioning swing shaft 32 swings and rotates later, the arc linkage arm 3201 pulls the linkage pull rod 33, and the linkage pull rod 33 pulls the front feeding tooth frame 26 to reciprocate relative to the front guide sliding block 28 and the rear positioning sliding block 29.

In order to realize the adjustment of the swing amplitude of the front feeding tooth 22 and thus realize the differential feeding between the front feeding tooth 22 and the rear feeding tooth 23, one end of the linkage pull rod 33 is provided with a sliding sleeve 3301 which is hinged to be positioned and swung, i.e. the sliding sleeve 3301 is sleeved with the arc linkage arm 3201 of the rear positioning swing shaft 32 to be in sliding fit, the inner side of the sliding sleeve 3301 corresponds to the linkage pull rod 33, the outer side of the sliding sleeve 3301 is connected with a sliding block 3302 in a shaft way, the sliding block 3302 is in sliding fit in a guide block 35 provided with a sliding groove, the guide block 35 is integrated with a guide bracket 3501 which is positioned in a sliding way with the shaft part of the rear positioning swing shaft 32, the sliding positioning direction corresponds to the radial direction of the rear positioning swing shaft 32, the outer side of the guide block 35 is fixedly connected with one end of an adjusting swing arm 36, the other end of the adjusting swing arm 36 is fixedly connected with a swing shaft 37, the swing shaft 37 is positioned on the base 1, and the outer end of the swing shaft 37 extends out of the base 1 and is connected with an adjusting handle 38.

Besides the above structure, the transmission structure also comprises a needle protection transmission mechanism for protecting the needle of the sewing machine and preventing the needle from deviating from the needle path or being inclined and damaged. The needle protection transmission mechanism comprises a needle protection support 7, a needle protection swing rod 8, a transmission swing rod 9 and a swing rod crank 10, the needle protection support 7 is located below a needle plate 5 at the top of a high-head base 2, the bottom of the needle protection support 7 is fixedly connected with the top end of the needle protection swing rod 8, the middle of the needle protection swing rod 8 is hinged with the middle of an auxiliary swing support 13, the bottom of the needle protection swing rod 8 is connected with one end of the transmission swing rod 9 in a shaft mode, one end of the swing rod crank 10 is movably connected with the other end of the transmission swing rod 9 in a sleeved mode, the other end of the swing rod crank 10 is provided with an eccentric adjusting sleeve 1001, the eccentric adjusting sleeve 1001 is movably connected with a lower shaft 4 in a sleeved mode, and the transmission swing rod 9 is parallel to the lower shaft 4. Further, the high head machine base 2 is fixedly provided with a U-shaped guide base 202 which limits the swing of the needle protection swing rod 8 and the auxiliary swing bracket 13.

The process of the hook needle feeding transmission structure of the high-head sewing machine is as follows: the lower shaft 4 rotates to respectively drive the swing rod crank 10, the ball head swing pull rod 21, the auxiliary swing crank 14, the front guide slide block 28 and the eccentric wheel set 30 to form eccentric swing, the swing rod crank 10 drives the needle protection swing rod 8 to swing, and the needle protection swing rod 8 drives the needle protection bracket 7 to realize needle protection operation. The ball head swinging pull rod 21 is matched with the ball head swinging sleeve 19, so that the swinging seat 15 is driven to swing while the lower swinging shaft 18 is driven to swing, the lower swinging shaft 18 swings and drives the lower swinging adjusting plate 17 to swing, the lower swinging adjusting plate is linked with the upper swinging connecting rod to swing, and the upper swinging connecting rod is linked with the crochet hook swinging seat to swing through the upper swinging crank, so that the swinging operation of the crochet hook is realized. The swing rotation of the auxiliary swing crank 14 drives the auxiliary swing support 13 to swing, and the top of the auxiliary swing support 13 drives the crochet hook swing seat 11 to swing, namely the crochet hook 6 swings and simultaneously forms lateral swing. The eccentric swing of the front guide slide block 28 drives the front feeding tooth rack 26 and the rear feeding tooth rack 27 to realize tooth lifting operation, namely tooth lifting operation of the front feeding tooth 22 and the rear feeding tooth 23. The eccentric rotation of the eccentric wheel set 30 drives the eccentric wheel swing frame 31 to form reciprocating swing, the eccentric wheel swing frame 31 pulls the rear feeding tooth frame 27 to form reciprocating motion relative to the front guide sliding block 28 and the rear positioning sliding block 29 through the shaft block 3102, meanwhile, the eccentric wheel swing frame 31 pulls the swing arm 3202 of the rear positioning swing shaft 32 to realize the positioning swing of the rear positioning swing shaft 32 relative to the base 1, the arc linkage arm 3201 of the rear positioning swing shaft 32 drives the linkage pull rod 33 to realize reciprocating motion, and the linkage pull rod 33 drives the front feeding tooth frame 26 to realize reciprocating motion along the front guide sliding block 28 and the rear positioning sliding block 29 through the pull rod pin 34; the front feeding tooth rack 26 and the rear feeding tooth rack 27 are respectively driven by the reciprocating motion of the front feeding tooth rack 26 and the rear feeding tooth rack 27 to swing relative to the hinge seat 201 of the high head base 2, that is, the front feeding tooth 22 and the rear feeding tooth 23 are driven to swing to realize feed.

The above contents are intended to illustrate the technical means of the present invention, and do not limit the technical scope of the present invention. Obvious modifications or substitutions for the present invention by a person of ordinary skill in the art in combination with the prior art also fall within the protection scope of the present invention.

Claims (8)

1. A kind of high-head sewing machine crochet hook pay-off drive structure, this drive structure includes the high-head bed (2), base (1), drive part, the high-head bed bottom is fixed to base (1), the high-head bed top fixedly connects the faller (5), the main axis of the drive part is the lower shaft (4), the lower shaft is connected with upper main axis (3) of the high-head sewing machine through the synchronous gear, drive belt transmission, the drive part includes crochet hook drive assembly and pay-off tooth drive assembly; it is characterized in that the crochet hook transmission component comprises a crochet hook main swing transmission mechanism and a crochet hook auxiliary swing transmission mechanism, the crochet hook main swing transmission mechanism comprises a crochet hook (6), a crochet hook swing seat (11), an upper swing crank (12), an up-and-down swing connecting rod (16), a lower swing adjusting plate (17), a lower swing shaft (18), a ball head swing sleeve (19), a ball head swing pull rod (21) and a ball head swing guide frame (20), the crochet hook auxiliary swing transmission mechanism comprises an auxiliary swing support (13) and an auxiliary swing crank (14), the crochet hook (6) is positioned below a needle plate (5) at the top of a high head machine seat (2), the crochet hook (6) is fixed on the crochet hook swing seat (11), the crochet hook swing seat (11) is fixedly connected with one end of the upper swing crank (12), the other end of the upper swing crank (12) is movably hinged with one end of the up-and-down swing adjusting plate (17), the other end of the up-down swing connecting rod (16) is movably hinged with one end of the lower swing adjusting plate (17), the other end of the lower swing adjusting plate (17) is fixedly connected with a lower swing shaft (18), the lower swing shaft (18) is rotatably positioned at the bottom of the auxiliary swing bracket (13), and the hinge axes of all movable hinge parts in the main swing transmission mechanism are axially parallel to the lower swing shaft (18); one end of the ball head swinging sleeve (19) is fixedly sleeved on the lower swing shaft (18), the other end of the ball head swinging sleeve (19) is provided with a ball head (1901) and a rod end (1902), the ball head (1901) of the ball head swinging sleeve (19) is movably connected in a round sleeve hole at the lower part of the ball head swinging pull rod (21), the upper part of the ball head swinging pull rod (21) is movably sleeved on the lower shaft (4) and is provided with an eccentric ball rod part (403), the rod end (1902) of the ball head swinging sleeve (19) extends out of the round sleeve hole to be matched with a guide sliding groove (2001) arranged on the ball head swinging guide frame (20), the guide sliding groove (2001) guides the ball head swinging sleeve (19) to swing along with the lower swing shaft (18), and the ball head swinging guide frame (20) is fixed on the ball head swinging pull rod (21); the upper end of the auxiliary swing support (13) is movably hinged with a shaft lever part of the upper swing crank (12) for fixing the crochet hook swing seat (11), namely, the crochet hook swing seat (11) swings along with the upper swing crank (12) and rotates relative to the upper end of the auxiliary swing support (13), the middle part of the auxiliary swing support (13) is hinged and positioned with one side of the high head machine base (2) to swing, the lower part of the auxiliary swing support (13) is movably hinged with one end of the auxiliary swing crank (14) close to the lower swing shaft (18), the hinged axis of the auxiliary swing support is parallel to the lower shaft (4), and the other end of the auxiliary swing crank (14) is fixedly provided with an eccentric swing sleeve (1401) which is movably sleeved on the lower shaft (4) through the eccentric swing sleeve (1401).

2. The crochet hook feeding transmission structure of the high-head sewing machine according to claim 1, characterized in that the movable hinge joint of the up-down swinging connecting rod (16) and the down swinging adjusting plate (17) is provided with a strip-shaped sliding hole A (1601) adapted to the hinge position adjustment.

3. The feeding and transmission structure of the crochet hook of the high-head sewing machine according to claim 1, characterized in that the lower swing adjusting plate (17) is fixed with one end of the lower swing shaft (18) through a screw, and the end of the lower swing adjusting plate (17) is provided with a strip-shaped sliding hole B (1701) which is adapted to be adjusted by the screw fixing position.

4. The crochet hook feeding transmission structure of the high head sewing machine according to the claim 1, characterized in that the active hinge of the secondary swing bracket (13) and the secondary swing crank (14) is provided with a strip-shaped sliding hole C (1301) adapted to the hinge position adjustment.

5. The crochet hook feeding transmission structure of the high-head sewing machine according to claim 1, characterized in that the feeding tooth transmission component comprises a front feeding tooth (22), a rear feeding tooth (23), a front feeding tooth swing rod (24), a rear feeding tooth swing rod (25), a front feeding tooth rack (26), a rear feeding tooth rack (27), a front guide slider (28), a rear positioning slider (29), an eccentric wheel set (30), an eccentric wheel swing rack (31), a rear positioning swing shaft (32), a linkage pull rod (33) and a pull rod pin (34), wherein the front feeding tooth (22) and the rear feeding tooth (23) are both positioned below the inner needle plate (5) of the high-head base (2), the front feeding tooth (22) is fixed with the top of the front feeding tooth swing rod (24), the rear feeding tooth (23) is fixed with the top of the rear feeding tooth swing rod (25), and the rectangular middle parts of the front feeding tooth swing rod (24) and the rear feeding tooth swing rod (25) are respectively and correspondingly provided with a front feeding tooth guide sliding hole (2401) and a rear feeding tooth guide sliding hole (2401) A guide sliding hole (2501), a front sliding block (2402) is arranged in the front feeding tooth rectangular guide sliding hole (2401), a rear sliding block (2502) is arranged in the rear feeding tooth rectangular guide sliding hole (2501), the front sliding block (2402) and the rear sliding block (2502) are coaxially positioned on a hinge seat (201) in the high head base (2) in a swinging manner, the bottom of a front feeding tooth swing rod (24) is movably hinged with one end of a front feeding tooth frame (26), the bottom of a rear feeding tooth swing rod (25) is movably hinged with one end of a rear feeding tooth frame (27), the front feeding tooth frame (26) and the rear feeding tooth frame (27) are both positioned in the base (1), one side of the front feeding tooth frame (26) is abutted against one side of the rear feeding tooth frame (27), front sliding holes (2601) matched with the front guide sliding block (28) in a sliding manner are arranged at the front ends of the front feeding tooth frame and the rear feeding tooth frame (26) and the rear positioning slider (29) in a sliding manner, rear sliding hole (2701) matched with the rear positioning slider (2701) in a sliding manner is arranged at the rear end of the front feeding tooth frame, the front guide sliding block (28) is movably sleeved and positioned on an eccentric shaft section A (401) arranged on the lower shaft (4), the rear positioning slide block (29) is swung and positioned on the base (1), the lower shaft (4) is provided with an eccentric shaft section B (402), an eccentric wheel set (30) is sleeved and arranged through an eccentric shaft section B (402), the outer diameter of the eccentric wheel surface of the eccentric wheel set (30) is sleeved and arranged with a needle roller ring gear (3001), the outer diameter of the needle roller ring gear (3001) is sleeved and arranged in a sleeve hole at one end of the eccentric wheel swing frame (31), one side of the eccentric wheel swing frame (31) is provided with a sliding port (3101), a sliding shaft block (3102) is arranged in the sliding port (3101), the shaft block (3102) is in shaft joint positioning with the rear feeding tooth frame (27), namely, the rear feeding tooth rack (27) reciprocates relative to the front guide sliding block (28) and the rear positioning sliding block (29) when swinging along with the eccentric wheel swinging rack (31); swing arm (3202) that eccentric wheel swing span (31) other end activity hinge back location swing axle (32) were equipped with, back location swing axle (32) pivot and rotate and be located base (1), and back location swing axle (32) axial region is equipped with arc linkage arm (3201) of radial setting, linkage pull rod (33) one end cup joints with arc linkage arm (3201) and forms sliding fit, and linkage pull rod (33) other end passes through pull rod round pin (34) swing joint preceding pay-off dental articulator (26), and follows when back location swing axle (32) pivot, arc linkage arm (3201) pulling linkage pull rod (33), linkage pull rod (33) pulling preceding pay-off dental articulator (26) for preceding guide slider (28), back location slider (29) are reciprocating motion.

6. The crochet hook feeding transmission structure of the high-head sewing machine according to claim 5, characterized in that one end of the linkage pull rod (33) is provided with a sliding sleeve (3301) which is hinged to be positioned and swung, namely, the linkage pull rod is sleeved with the arc linkage arm (3201) of the rear positioning swing shaft (32) through the sliding sleeve (3301) to be in sliding fit, the inner side of the sliding sleeve (3301) corresponds to the linkage pull rod (33), the outer side of the sliding sleeve (3301) is axially connected with a sliding block (3302), the sliding block (3302) is in sliding fit in a guide block (35) provided with a sliding groove, the guide block (35) is integrated with a guide bracket (3501) which is positioned in a sliding way with the shaft part of the rear positioning swing shaft (32), the direction of the sliding positioning corresponds to the radial direction of the rear positioning swing shaft (32), one end of an adjusting swing arm (36) is fixedly connected to the outer side of the guide block (35), the other end of the adjusting swing arm (36) is fixedly connected with a swing shaft (37), the swing shaft (37) is movably positioned on the base (1), and the outer end of the pendulum shaft (37) extends out of the base (1) and is fixedly connected with an adjusting handle (38).

7. The crochet hook feeding transmission structure of the high-head sewing machine according to claim 1, characterized in that the transmission structure further comprises a needle protection transmission mechanism, the needle protection transmission mechanism comprises a needle protection bracket (7), a needle protection swing rod (8), a transmission swing rod (9) and a swing rod crank (10), the needle protection bracket (7) is positioned below the needle plate (5) at the top of the high-head base (2), the bottom of the needle protection bracket (7) is fixedly connected with the top end of the needle protection swing rod (8), the middle part of the needle protection swing rod (8) is hinged with the middle part of the auxiliary swing bracket (13) in the same position, the bottom of the needle protection swing rod (8) is connected with one end of the transmission swing rod (9) in a shaft way, the other end of the transmission swing rod (9) is movably sleeved with one end of the swing rod crank (10), the other end of the swing rod crank (10) is provided with an eccentric adjusting sleeve (1001), and the eccentric adjusting sleeve (1001) is movably sleeved and positioned on the lower shaft (4), the transmission swing rod (9) is parallel to the lower shaft (4).

8. The feed transmission structure for the crochet hook of the high head sewing machine according to claim 7 is characterized in that the high head machine base (2) is fixedly provided with a U-shaped guide seat (202) for limiting the swing of the needle protection swing rod (8) and the auxiliary swing bracket (13).

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