Abrégé

An automatic presser foot lifting, thread cutting, feed-dog height adjusting and needle pitch adjusting mechanism suitable for a overlocker. The automatic presser foot lifting, thread cutting, feed-dog height adjusting and needle pitch adjusting mechanism comprises a stepping motor (1) and a main shaft (17), wherein a needle pitch mechanism limiting cam (3), a thread cutting mechanism driving cam (19), a presser foot mechanism driving cam (29) and a feed-dog adjustment mechanism driving cam (37) are arranged on an output shaft of the stepping motor (1). The needle pitch mechanism limiting cam (3), thread cutting mechanism driving cam (19), presser foot mechanism driving cam (29) and feed-dog adjustment mechanism driving cam (37) correspond for power transmission to a needle pitch adjustment transmission assembly, thread cutter assembly (28), presser foot assembly (36) and feed-dog rack assembly (49) respectively, thus achieving the functions of automatically lifting a presser foot, cutting thread, adjusting feed-dog height and adjusting the needle pitch. The automatic presser foot lifting, thread cutting, feed-dog height adjustment and needle pitch adjusting mechanism is simple in terms of operation and low in cost, thereby effectively improving the production efficiency of an enterprise.

Classes IPC  ?

• D05B 29/02 - Dispositifs de commande du presseur
• D05B 65/00 - Dispositifs pour sectionner le fil de l'aiguille ou le fil du dessous dans les machines à coudre
• D05B 27/24 - Dispositifs pour lever ou abaisser les griffes d'entraînement
• D05B 27/22 - Moyens d'entraînement de l'ouvrage pour machines à coudre avec moyens pour régler la longueur du point
• D05B 69/02 - Entraînements mécaniques
• D05B 69/10 - Dispositifs électriques ou électromagnétiques

Abrégé

A sewing machine and a bird nest prevention mechanism of the sewing machine. The bird nest prevention mechanism comprises a thread hooking assembly; the thread hooking assembly comprises a thread hooking electromagnet (12), a thread hooking plate (14), a magnet fixing base (15), a guide plate (20), an adjustable pressing plate (18), and a thread hook pressing plate (19); a guide groove (20-1) is provided in the guide plate (20); the thread hooking plate (14) is mounted in the guide groove (20-1), and is connected to the thread hooking electromagnet (12) by means of a pin (13); the adjustable pressing plate (18) is adjustably fixed to the guide plate (20) by means of a screw (17) and a nut (22); the thread hook pressing plate (19) is located in the guide groove (20-1); the magnet fixing base (15) is connected to the thread hooking fixing base (10) by means of connecting pins (11) and a connecting hole (a8). The thread hooking plate (14) works with the thread hook pressing plate (19) to better clamp thread ends; moreover, thread ends cut off are collected by means of a thread suction channel, and a thread take-up assembly adjusts the thread amount to prevent threads cut off from flying; in this way, the problem of bunching up of threads is solved, and thread residues and floating dust in workshops are reduced.

Classes IPC  ?

• D05B 53/00 - Mécanismes de guidage pour la pose de fil ou de cordelette pour machines à coudreDoigts de guidage du fil pour machines à coudre
• D05B 49/00 - Dispositifs releveur tendeur de fil d'aiguille des machines à coudre, p. ex. leviers
• D05B 65/06 - Dispositifs pour sectionner le fil de l'aiguille ou le fil du dessous dans les machines à coudre et pour évacuer les bouts de fils sectionnés

Abrégé

An automatic feeding auxiliary device, comprising a mounting plate frame (1), and a rolling material guide mechanism (2), pressing and pushing material cutting mechanisms (3), an air suction and material discharging mechanism (4), and a cotton cushion strip placing mechanism which are arranged on the mounting plate frame (1). The rolling material guide mechanism (2) drives a cotton cushion strip, and sends the cotton cushion strip to a pressing and pushing material cutting mechanism (3). A sliding shaft (8) is mounted on the mounting plate frame (1), and a plurality of pressing and pushing material cutting mechanisms (3) are arranged on the sliding shaft (8). The pressing and pushing material cutting mechanisms (3) each comprise a sliding seat (9), a cloth guide plate (10) mounted on the sliding seat (9), a strip pressing telescopic cylinder (11), a strip pressing lifting cylinder (12), a cloth pressing and shifting cylinder (13), a cutter cylinder (14), a cutter (15), and a pressing strip (16). The cylinders and the cutter cooperate to press, cut, and push cotton cushion strips. The air suction and material discharging mechanism (4) can suction cotton cushion strips and send the cotton cushion strips to a pre-sewing position. In addition to ensuring fast feeding speed and high feeding positioning accuracy, accurate fabric rolling, fabric pressing, fabric cutting, fabric pushing, waste blowing and other actions can be carried out. Moreover, the structure is simple, and mounting and maintenance are convenient.

Classes IPC  ?

• D05B 35/06 - Éléments d'alimentation ou de manutention de l'ouvrage pour machines à coudre non prévus ailleurs pour fixer les bandes, rubans, bandes étroites ou passements, ou pour bordage
• D05B 37/06 - Dispositifs de coupe avec des outils oscillants
• D05B 81/00 - Machines à coudre dans lesquelles sont intégrés des dispositifs servant à d'autres travaux que le piquage, p. ex. pour souffler de l'air, pour meuler

Abrégé

A cutting mechanism of a sewing machine, comprising a driving source, a swing seat, a cutter assembly, an upper feeding device, a lower feeding device, and a needle plate seat. The driving source is mounted on a housing of a sewing machine, and an output shaft of the driving source is arranged in the housing; the swing seat has one end fixedly arranged on the output shaft, and the other end connected to the cutter assembly by means of a cutting transmission assembly; when the driving source rotates, the swing seat and the cutting transmission assembly sequentially drive the cutter assembly to move downwards, and the cutter assembly performs a cutting operation on the needle plate seat in conjunction with the upper feeding device and the lower feeding device; when the driving source rotates in the opposite direction, the swing seat and the cutting transmission assembly sequentially drive the cutter assembly to move upwards, and the cutter assembly is separated from the needle plate seat and then stops the cutting operation. The driving source in the cutting mechanism is arranged on the housing, and the swing seat and a first transmission member of the cutting transmission assembly are both arranged in an internal cavity of the housing, so that the safety protection performance is improved, the structure is compact, the occupied space is small, and no additional device is required for cutting.

Classes IPC  ?

• D05B 37/04 - Dispositifs de coupe
• D05B 27/00 - Moyens d'entraînement de l'ouvrage pour machines à coudre

Abrégé

Disclosed in the present invention are a presser foot lifting mechanism of a sewing machine, comprising a mounting frame, a transmission shaft, a swing shaft, a swing seat, a torsion spring, an ejector rod, and a presser foot assembly. The mounting frame is fixedly mounted at the bottom of a machine base of the sewing machine, the transmission shaft passes through the mounting frame, the swing shaft is connected to the machine base by means of a shaft sleeve, and a gear assembly forming a transmission connection is provided between the transmission shaft and the swing shaft; the swing seat is fixedly mounted on the swing shaft, the torsion spring is limitedly mounted at one end of the swing shaft by means of a circlip, and one end of the torsion spring is limited by the bottom of the machine base, and the other end is fastened on the swing seat; the lower end of the ejector rod is connected to the swing seat, and the upper end of the ejector rod is in linkage connection with the presser foot assembly by means of a swing crank and a pull rod. According to the present invention, the presser foot lifting mechanism is driven in a gear transmission manner, and the assembly manner of components is relatively simple; moreover, the physical output of an operator can be reduced by a gear output ratio, thereby realizing control with less effort, and avoiding idle running.

Classes IPC  ?

• D05B 29/02 - Dispositifs de commande du presseur
• D05B 69/02 - Entraînements mécaniques

Abrégé

A thread trimming and presser foot lifting structure of a sewing machine, comprising a rotary driving source (1), a thread trimming mechanism (2), and a presser foot lifting mechanism (3). An output shaft (11) of the rotary driving source (1) penetrates through the left end and the right end of the rotary driving source (1), a thread trimming transmission assembly (4) is arranged between the left end of the output shaft (11) and the thread trimming mechanism (2), a presser foot lifting transmission assembly (5) is arranged between the right end of the output shaft (11) and the presser foot lifting mechanism (3), and a knee lifter assembly (6) is connected to the presser foot lifting transmission assembly (5); the left end of the output shaft (11) can drive, by means of the thread trimming transmission assembly (4), the thread trimming mechanism (2) to execute a thread trimming action, and when the thread trimming action is executed, the presser foot lifting mechanism (3) does not execute a presser foot lifting action; the right end of the output shaft (11) can drive, by means of the presser foot lifting transmission assembly (5), the presser foot lifting mechanism (3) to execute the presser foot lifting action, and when the presser foot lifting action is executed, the thread trimming mechanism (2) does not execute the thread trimming action; the knee lifter assembly (6) can drive the presser foot lifting mechanism (3) to execute the presser foot lifting action.

Classes IPC  ?

• D05B 65/00 - Dispositifs pour sectionner le fil de l'aiguille ou le fil du dessous dans les machines à coudre
• D05B 29/02 - Dispositifs de commande du presseur

Abrégé

A sewing machine having an automatic upper-thread threading structure. The sewing machine comprises a machine head, a machine needle arranged in the machine head, an air cylinder arranged on the machine head, and a mounting plate arranged below the machine head and driven by the air cylinder to lift, wherein a pin-type air cylinder is fixedly mounted on the mounting plate; a guide device is arranged at the front end of the pin-type air cylinder, and comprises a first guide piece and a second guide piece, which are integrally formed; a through hole is machined on the guide device, and is located between the first guide piece and the second guide piece; the distance between the first guide piece and the second guide piece gradually reduces from a free end to the through hole; the guide device is internally provided with a hook head and a spring; and the hook head passes out of the through hole under the action of an elastic force of the spring. The guide device has a guiding effect, such that the hook head conveniently extends into a threading hole of the machine needle, and the hook head forms elastic support by means of the internally disposed spring, such that a direct rigid impact is avoided, and the machine needle is effectively protected; and the sewing machine has a rational structural design, and skilfully and automatically threads an upper thread, thereby improving the working efficiency.

Classes IPC  ?

• D05B 87/02 - Dispositifs d'enfilage de l'aiguille avec des moyens mécaniques pour faire passer le fil à travers le chas de l'aiguille

Abrégé

A presser foot lifting and needle pitch adjusting mechanism on a sewing machine. The presser foot lifting and needle pitch adjusting mechanism comprises: a power member (3); a needle pitch adjusting and presser foot lifting driving shaft (6), the needle pitch adjusting and presser foot lifting driving shaft and the power member being in driving connection with each other and synchronously rotating; a presser foot lifting driving cam (5), the presser foot lifting driving cam being provided with a working contour surface, which comprises a presser foot lifting static contour section (53) and a presser foot lifting working contour section (52); and a needle pitch adjusting driving cam (7), the needle pitch adjusting driving cam having a working contour surface, which can be divided into a needle pitch adjusting driving contour section (72) and a needle pitch adjusting static contour section (73), the presser foot lifting driving cam and the needle pitch adjusting driving cam being mounted on the needle pitch adjusting and presser foot lifting driving shaft, and respectively being in driving connection with a corresponding presser foot lifting mechanism and a corresponding needle pitch adjusting mechanism. Since the presser foot lifting and needle pitch adjusting mechanism achieves, by means of one power member, the two functions of presser foot lifting and needle pitch adjusting, the structure can be greatly simplified, such that the structure is simple and compact, the transmission efficiency is high, and the stability is good; moreover, compared with an existing sewing machine, such driving assembly has fewer parts involved, thereby also having a relatively low manufacturing cost. In addition, provided is a sewing machine comprising the presser foot lifting and needle pitch adjusting mechanism.

Classes IPC  ?

• D05B 29/02 - Dispositifs de commande du presseur
• D05B 27/22 - Moyens d'entraînement de l'ouvrage pour machines à coudre avec moyens pour régler la longueur du point
• D05B 69/02 - Entraînements mécaniques
• D05B 69/10 - Dispositifs électriques ou électromagnétiques

Abrégé

An intelligent measurement apparatus suitable for a sewing machine, comprising a housing, a bed plate, and a presser foot assembly. A measurement apparatus is mounted and connected on the housing; the measurement apparatus comprises a displacement sensor, a movable bracket, and a fixed bracket; the fixed bracket is fixed to the housing; the movable bracket is connected to the fixed bracket and can rotate relative to the fixed bracket; the displacement sensor is fixedly connected to the movable bracket; the displacement sensor rotates along with the movable bracket in a complete release state, and the end of the displacement sensor corresponds to the presser foot assembly in the front-back direction and is in contact fit with the bed plate; the displacement sensor is connected to an electronic control system of the sewing machine by means of a circuit and feeds back a displacement signal generated by the displacement sensor. The intelligent measurement apparatus can automatically measure the thickness of a material to be sewed before sewing, and a signal source can be provided for automatic adjustment of a sewing machine, so that the adjustment precision and production efficiency of the sewing machine are greatly improved; moreover, the rotating speed of the sewing machine is adjusted in time according to a measurement signal, so that the operation is more stable, and the service life of sewing-related parts is prolonged.

Classes IPC  ?

• D05B 29/02 - Dispositifs de commande du presseur
• D05B 19/12 - Machines à coudre commandées par programme comprenant une mémoire électronique ou une unité de commande par microprocesseur caractérisées par la commande du fonctionnement de la machine

Abrégé

Disclosed in the present invention is a rectangular track feeding mechanism on a sewing machine. The rectangular track feeding mechanism comprises a spindle electric motor, a spindle, a feeding horizontal swing assembly, and a feeding vertical swing assembly, wherein the feeding vertical swing assembly comprises a vertical shaft gear pair assembly, a transmission shaft, a cylindrical gear pair, a tooth lifting shaft and a tooth fork crank; the cylindrical gear pair comprises a gear wheel and a pinion, wherein a track cam is arranged on the gear wheel, and a tooth lifting crank is arranged on the tooth lifting shaft; and the track cam is provided with a cloth feeding tooth lifting area, a cloth feeding tooth diving area and a vertical switching transition damping area, and the track cam matches the tooth lifting crank by means of each area and is converted into a periodic swing of the tooth lifting shaft, such that a feeding assembly connected to the tooth fork crank moves vertically and matches the swinging of the feeding horizontal swing assembly to achieve a rectangular track motion of a cloth feeding tooth motion track. The structure designed by the present invention can sew a rectangular track, and has stable feeding and good multi-layer sewing performance, thereby satisfying higher requirements of a customer.

Classes IPC  ?

• D05B 27/02 - Moyens d'entraînement de l'ouvrage pour machines à coudre avec griffes d'entraînement à mouvements horizontaux et verticaux

Abrégé

Disclosed in the present invention are a rotating shuttle and oil pump matching operation mechanism for a sewing machine. The rotating shuttle and oil pump matching operation mechanism comprises an electric motor, a lower shaft, a rotating shuttle, a vertical shaft, a gear pair assembly and an oil pump, wherein the electric motor is mounted on a sewing machine casing and is in transmission connection to the lower shaft by means of an electric motor shaft of the electric motor, the lower shaft is connected to a sewing machine bottom plate, the oil pump is fixedly connected to the sewing machine bottom plate and is in fit transmission connection to the vertical shaft, the rotating shuttle is arranged at an end portion of the lower shaft, meshing transmission is formed between the lower shaft and the vertical shaft by means of the gear pair assembly, the rotating shuttle and the oil pump operate synchronously by means of the electric motor, and the oil pump lubricates the rotating shuttle by means of an oil pipe. The rotating shuttle and oil pump matching operation mechanism provided in the present invention operates by means of independent control of electric control, and an independent transmission mechanism designed is convenient to mount and has strong controllability, such that stitches can be better controlled, the stability is good, and the accuracy of thread hooking time during operation of the rotating shuttle is high. Further disclosed in the present invention is a sewing machine using the mechanism.

Classes IPC  ?

• D05B 57/30 - Entraînement pour boucleurs
• D05B 71/00 - Dispositifs de lubrification ou de refroidissement pour machines à coudre

Abrégé

Provided is a thread trimming and presser foot mechanism of a sewing machine, comprising a step motor (3), a housing, a thread trimming connecting rod (10), a thread trimming connecting rod shaft (8), a thread trimming drive shaft (6), and a thread trimming assembly (7); a thread trimming cam (4) is mounted at the left shaft end of the step motor (3); a thread trimming shaft sleeve (5) and a thread trimming connecting rod sleeve (9) are mounted on the housing; the thread trimming shaft sleeve (5) is provided with the thread trimming drive shaft (6); the thread trimming assembly (7) is mounted on the left end of the thread trimming drive shaft (6); the thread trimming connecting rod shaft sleeve (9) is provided with the thread trimming connecting rod shaft (8); a thread trimming connecting rod (10) is mounted on the right outer end of the thread trimming connecting rod shaft (8), and hinged by means of a first thread trimming connecting rod axis screw (11); a first roller (12) is mounted on the outer side of the first thread trimming connecting rod shaft screw (11); the other end of the thread trimming connecting rod (10) is connected to the end of the thread trimming drive shaft (6). The mechanism uses a step motor (3) to independently perform the trimming and presser foot movements, reducing product costs, and, by controlling the operation of the step motor (3) by means of an electronic control program, reducing the workload of employees.

Classes IPC  ?

• D05B 29/02 - Dispositifs de commande du presseur
• D05B 65/00 - Dispositifs pour sectionner le fil de l'aiguille ou le fil du dessous dans les machines à coudre
• D05B 69/10 - Dispositifs électriques ou électromagnétiques

Produits et services

Sewing machines; edge sewing machines; industrial sewing machine tables; pedal drives for sewing machines; whipstitch machines; bicycle dynamos; current generator; engines other than for land vehicles; dynamos; driving motors other than for land vehicles.

Produits et services

Sewing machines; dynamos; control mechanisms for machines, engines or motors.