CN111962220A - Intelligent multifunctional sewing machine - Google Patents

Abstract

The application provides a multi-functional sewing machine of intelligence, concretely relates to sewing machine makes technical field, including driving source, trimming crank and trimming cam, its characterized in that, the driving source drives trimming cam's commentaries on classics ball and exerts the revolving force to trimming working face and carry out the trimming, and the driving source drives trimming cam's commentaries on classics ball under the operation pushes away trimming return surface. The application provides a multi-functional sewing machine of intelligence is after trimming mechanism folk prescription is to accomplishing the trimming to have and spread the setting that helps preventing that the mechanism that resets is blocked, greatly improved the condition of avoiding the broken needle of screens card sword and taken place, make sewing machine performance reliable and more stable.

Description

Intelligent multifunctional sewing machine

Technical Field

The application provides a multi-functional sewing machine of intelligence, concretely relates to sewing machine makes technical field.

Background

The sewing machine is a sewing machine, is developed from a pedal type household sewing machine to the prior industrial sewing machine driven by a motor, and has the functions of loosening threads, cutting threads, lifting presser feet and reinforcing seams. In the sewing machine technology, a plurality of electromagnets are used as power sources to drive the actions of thread loosening, thread cutting, presser foot lifting and seam reinforcement respectively. In recent years, a stepping motor is combined with an electromagnet to respectively drive and control thread loosening, thread trimming, presser foot lifting and seam reinforcement. However, there are many different disadvantages, such as complicated structure, high cost, poor product stability and durability. In addition, some sewing machines need to return to the initial position to perform other subsequent sewing actions when executing the sewing actions, so that the hysteresis among the actions is obvious, the actions can not react quickly like a plurality of motors and electromagnets controlling a plurality of sewing actions, and the problems of improving the transmission efficiency of the sewing machine and overcoming the action hysteresis are needed.

Disclosure of Invention

To the not enough in the current sewing machine technique, this application proposes with the intelligent control technique, and spindle motor in coordination realizes trimming, lifts presser foot, pine line and reinforcement seam pattern seam stitch gauge automatically regulated function freely with a driving source, provides an intelligent multi-functional sewing machine, including driving source, trimming crank and trimming cam, its characterized in that, the driving source drives trimming cam's commentaries on classics ball and exerts the revolving force to trimming effect face and carry out the trimming, the driving source drives trimming cam's commentaries on classics ball operation pushes down trimming return surface.

Further, the thread trimming cam rotates on the thread trimming swing seat to drive the tail end to execute the cutting assembly.

Furthermore, the thread cutting action surface and the thread cutting return surface are arranged inside the thread cutting cam, and the thread cutting action surface is located below the thread cutting return surface.

Furthermore, the thread cutting crank is fixedly arranged on the front output shaft, and a shaft fixing hole formed in the thread cutting crank is used for being fixedly arranged on the front output shaft in a penetrating mode.

Further, the rotary ball is positioned at the end of the trimming crank rocker, and the rotary ball runs at the end of the rocker under the operation of the driving source.

Further, the driving source rotates clockwise in the operation angle to enable the thread trimming crank to drive the thread trimming cam.

Compared with the prior art, the beneficial effects of this application are: four sewing actions of lifting the presser foot, loosening the thread, reinforcing the back-and-forth sewing and trimming the thread are controlled by one motor, so that the production cost of the sewing machine is greatly reduced, and the power source motor transmission efficiency of the sewing machine is effectively improved; after the wire cutting mechanism operates in a single direction to cut the wire, the auxiliary reset is carried out in the same direction to prevent the mechanism from being blocked, so that the situation that a clamping knife is blocked and a needle is broken is greatly avoided; the problem of high cost caused by a sewing mechanism due to the fact that the thread is loosened by adopting an electromagnet is effectively solved; the pure mechanical thread loosening scheme is combined with the presser foot lifting mechanism and the automatic regulating mechanism for the free pattern sewing stitch pitch of the reinforced seam, so that the rigidity and stability of the sewing machine are greatly improved, the simplification of a mechanical structure is realized, the structure of the sewing machine is optimized to the greatest extent, and the production fashionable dress formula of the sewing machine is convenient; in the aspect of control procedures, the sewing machine does not need to execute one action and return to a corresponding initial position, the driving source is enabled to operate without dead angles within 360 degrees to execute each sewing action sequence, better working timing sequence is achieved, the working efficiency of the sewing machine is improved, the sewing quality is improved, the performance of the sewing machine is enabled to be more stable and reliable, and the excellent technical effect of realizing four sewing actions under the control of one motor is achieved.

Drawings

FIG. 1 is a schematic view of an intelligent multifunction sewing machine according to the present application;

FIG. 2 is a schematic view of an automatic adjustment mechanism for a stitch pitch of a free pattern stitch of a reinforced stitch of the intelligent multifunctional sewing machine;

FIG. 3 is a schematic view of a feeding swing seat of an automatic adjusting mechanism for a pattern stitch pitch of a free stitch of a reinforced seam of an intelligent multifunctional sewing machine according to the present application;

FIG. 4 is a schematic view of a presser foot lifting mechanism and a thread releasing mechanism of the intelligent multifunction sewing machine of the present application;

FIG. 5 is a schematic view of a thread trimming mechanism of an intelligent multifunctional sewing machine according to the present application;

FIG. 6 is a schematic diagram illustrating the operation of the various mechanisms of an intelligent multifunction sewing machine according to the present application;

FIG. 7 is a schematic view of a compound drive wheel and a rotating clevis of an intelligent multi-function sewing machine according to the present application;

FIG. 8 is a schematic view of a composite drive wheel of an intelligent multifunction sewing machine according to the present application;

fig. 9 is an enlarged view of a thread trimming mechanism of the intelligent multifunction sewing machine according to the present application.

The reference numbers are as follows: the sewing machine comprises a driving source 10, a front output shaft 11, a rear output shaft 12, a compound transmission wheel 13, a swing column 131, a thread loosening convex point 133, a presser foot lifting cam part 134, an original point 14, a needle pitch adjusting area 15, a needle pitch adjusting positive value area 16, a needle pitch adjusting negative value area 17, a thread cutting and loosening area 18, a presser foot lifting area 19, a presser foot lifting peak 190, a presser foot lifting first area 191 and a presser foot lifting second area 192;

the thread cutting mechanism 20, the thread cutting crank 21, the rotary ball 211, the thread cutting fork wheel 22, the thread cutting action surface 221, the thread cutting return surface 222 and the thread cutting swing seat 23;

the automatic adjusting mechanism 30 for the free sewing pattern stitch;

a presser foot lifting mechanism 40, a presser foot lifting ejector rod 41, a presser foot lifting top plate 42 and a leaning plate 421;

the thread releasing mechanism 50, the thread releasing pressing plate 51, the thread releasing steel wire hose 52, the thread releasing device mounting bracket 53, the thread releasing device supporting plate 54, the copper sleeve 55, the thread releasing device ejector rod 56 and the steel wire 57.

Detailed Description

The following detailed description of the preferred embodiments of the present application, taken in conjunction with the accompanying drawings, is provided to enable those skilled in the art to more readily understand the advantages and features of the present application, and is intended to more clearly and distinctly define the scope of the invention, which is set forth by way of illustration only and is not intended to be limiting of the invention.

Fig. 1 is a diagram of an intelligent multifunctional sewing machine according to the present application, which includes a driving source 10, the driving source 10 is a driving device for outputting power by two heads, the driving source 10 includes a front output shaft 11 and a rear output shaft 12, and the driving source 10 rotates to drive the front output shaft 11 and the rear output shaft 12 to rotate. The driving source 10 controls the thread trimming mechanism 20, the pattern stitch automatic adjusting mechanism 30 for freely sewing the reinforced seam, the presser foot lifting mechanism 40 and the thread loosening mechanism 50 through the front output shaft 11 and the rear output shaft 12; the sewing control of the thread trimming mechanism 20, the stitch pitch automatic adjusting mechanism 30 of the free stitch pattern of the reinforced seam, the presser foot lifting mechanism 40 and the thread loosening mechanism 50 is realized in different running corners of the driving source 10 in different time sequences, specifically, the scheme of the embodiment is that the stitch pitch automatic adjusting mechanism 30 of the free stitch pattern of the reinforced seam, the presser foot lifting mechanism 40 and the thread loosening mechanism 50 are controlled by the rear output shaft 12, and meanwhile, the thread trimming mechanism 20 is controlled by the front output shaft 11.

In fig. 1, 2 and 3, the rear output shaft 12 of the present application controls the automatic stitch length adjusting mechanism 30, the presser foot lifting mechanism 40 and the thread loosening mechanism 50 of the free stitch pattern of the reinforced seam, and particularly, the compound transmission wheel 13 is fixed on the rear output shaft 12, and the compound transmission wheel 13 executes the reinforced seam action of the automatic stitch length adjusting mechanism 30 of the free stitch pattern of the reinforced seam, the presser foot lifting action of the presser foot lifting mechanism 40 and the thread loosening action of the thread loosening mechanism 50 in different rotation angles in different time periods under the operation of the driving source 10.

Fig. 1, 2, 3, 6 and 7 show an automatic adjustment mechanism 30 for the stitch gauge of a free-form pattern stitch of a reinforcing seam. The stitch length automatic regulating mechanism 30 for the free stitch pattern stitch of the reinforced seam comprises a driving source 10, a composite driving wheel 13, a feeding shaft 31, a feeding connecting rod 32, a feeding swing seat 33, a driving swing seat shaft sleeve 34, a stitch length backstitch connecting rod 35, a swing positioning rod 36, a rotary connecting fork rod 37, a feeding crank component 391, a feeding long swing plate 392 and a feeding swing plate positioning pin 393. The rotation connection fork 37 has a swing positioning groove 371, and two limiting arc surfaces 372, a front positioning portion 373, and a rear positioning portion 374 are disposed inside the swing positioning groove 371, and the two limiting arc surfaces 372 are disposed between the front positioning portion 373 and the rear positioning portion 374. The feeding swing seat 33 is fixedly connected with the feeding shaft 31 by two feeding long swing plates 392 and a feeding crank component 391, the feeding swing seat 33 is connected with a feeding connecting rod 32, and the other end of the feeding swing seat 33 is connected with a stitch length backstitch connecting rod 35.

The feeding shaft 31 and the feeding connecting rod 32 are feeding power transmission parts for realizing sewing of the sewing machine, the feeding connecting rod 32 is driven by a main shaft motor of the sewing machine, the feeding connecting rod 32 transmits up-down reciprocating motion to the feeding swing seat 33, the feeding swing seat 33 with a swing source indirectly transmits to the feeding shaft 31, the feeding shaft 31 and the feeding connecting rod 32 cooperate to complete cloth pushing, the reinforcing seam is realized by the automatic pattern sewing stitch length adjusting mechanism 30 for reinforcing seam motion, the reinforcing seam is realized by the feeding shaft 31 under the reciprocating motion in a corner of the driving source 10, the feeding connecting rod 32 plays the same role as a normal seam in power transmission, and the difference lies in that the running direction of the feeding shaft 31 is just opposite to that of the normal seam mode.

The driving source 10 of the present application is a rotary power device such as an electromagnet, and preferably a motor.

The compound transmission wheel 13 is fixed on the rear output shaft 12 and runs along with the driving source 10. The composite driving wheel 13 is provided with a swing column 131, the swing column 131 is positioned at an eccentric position (in fig. 8) of the composite driving wheel 13, the driving source 10 drives the swing column 131 of the composite driving wheel 13 to operate in the rotary connecting fork rod 37 to generate a swing source, the rotary connecting fork rod 37 transmits the swing source to a feeding swing seat 33 indirectly from a transmission swing seat shaft sleeve 34, finally the feeding swing seat 33 transmits the swing source to a feeding shaft 31, and the feeding shaft 31 acts on a feed dog to perform reinforcing, wherein the reinforcing back-and-forth seam depends on the operation angle and direction of the feeding shaft 31 to realize the reinforcing seam action.

The swing positioning groove 371 is formed at one end of the rotary joint yoke 37, the swing column 131 is positioned on the front positioning portion 373 or the rear positioning portion 374 of the rotary joint yoke 37, the driving source 10 drives the swing column 131 to generate and transmit a swing source to the rotary joint yoke 37, in this embodiment, the swing column 131 is selected to be positioned on the front positioning portion 373 to perform the reinforcement back-and-forth sewing operation, the composite driving wheel 13 drives the rotary joint yoke 37 to bring the swing source for the reinforcement back-and-forth sewing operation, and the technical effects of the swing column 131 positioned on the rear positioning portion 374 are the same. Through the cooperation of the compound transmission wheel 13 and the rotary joint yoke 37, the swing source output of the sewing machine of the present application has rationality and stability, and a driving source 10 is effectively utilized, wherein the compound transmission wheel 13 and the rotary joint yoke 37 are required to be used in combination in the present embodiment, and it is stated herein that the compound transmission wheel 13 and the rotary joint yoke 37 can achieve the above purpose by adopting a split type, and the present invention should be within the protection scope of the present application.

The driving source 10 reciprocates in the corner to drive the swing post 131 positioned at the front positioning portion 373 to swing, the swing post 131 directly swings the rotary connecting fork rod 37, the rotary connecting fork rod 37 transmits the swinging motion to the transmission swing seat shaft sleeve 34, the transmission swing seat shaft sleeve 34 sequentially transmits the swinging motion to the needle pitch backstitch connecting rod 35 and the feeding swing seat 33, and finally the feeding shaft 31 generates the forward and reverse direction to realize the seam reinforcement motion. The embodiment also provides that the driving source 10 reciprocates within 30 degrees to drive the feeding shaft 31 and the feeding connecting rod 32 to realize the seam reinforcement, so that the feeding shaft 31 is changed into the anticlockwise operation from the clockwise operation of the front seam routing. When the driving source 10 needs to take other sewing actions, the driving source moves out of the angle of 30 degrees so that the swing post 131 runs in the range of the two limit cambered surfaces 372.

After the driving source 10 drives the swing post 131 to operate within the two limit arcs 372 of the rotating linking fork 37, the swing post 131 idles between the two limit arcs 372 and thus does not generate a thrust action on the rotating linking fork 37, and the driving source 10 can perform the actions of trimming, loosening and lifting the presser foot (fig. 7 shows that the swing post 131 is inside the rotating linking fork 37).

The driving source 10 drives the swing post 131 to idle in the range of the two limit arc surfaces 372 arranged between the front positioning portion 373 and the rear positioning portion 374, the driving source 10 performs the actions of thread cutting, thread loosening and presser foot lifting (refer to fig. 7 in particular) by using the continuous operation time, and the driving source 10 also performs the actions of thread cutting, thread loosening and presser foot lifting by using the time when the swing post 131 cannot drive the rotary connecting fork rod 37. In other words, the two limiting arcs 372 are arranged, so that the swinging column 131 does not push the rotary clevis pin 37 when the driving source 10 performs the actions of trimming, loosening and lifting the presser foot, and the swinging column 131 runs on the limiting arcs 372 to enable the rotary clevis pin 37 to be in a static state. The driving source 10 performs the thread cutting action, the thread loosening action and the presser foot lifting action in a non-stop state after the swinging of the rotary connecting fork rod 37 is performed by driving the swinging column 131, thereby effectively realizing the continuity of the sewing action and improving the overall performance of the sewing machine.

For moving the connection between above-mentioned transmission pendulum seat axle sleeve 34 and the pay-off axle 31, pendulum seat axle sleeve 34 is fixed on pay-off axle 31, can adopt clearance fit's mode here to realize that transmission pendulum seat axle sleeve 34 moves with both of pay-off axle 31 and is connected, can adopt the connection that moves of various ═ modes, this embodiment scheme preferably adopts the bearing (not indicate in the picture to mark), be fixed with the bearing at transmission pendulum seat axle sleeve 34 internally mounted promptly, the bearing is tight again overlaps on pay-off axle 31, the fixing of bearing makes transmission pendulum seat axle sleeve 34 activity fix on pay-off axle 31.

The rotary connecting fork rod 37 is connected with the fixed transmission swing seat shaft sleeve 34, the rotary connecting fork rod 37 is fixedly connected with the transmission swing seat shaft sleeve 34 and can be integrally formed or welded, and two screw holes are formed in one end of the rotary connecting fork rod 37, so that the rotary connecting fork rod 37 is fixed on the transmission swing seat shaft sleeve 34 through screws.

The transmission swing seat shaft sleeve 34 is cylindrical, a first transmission swing seat shaft sleeve anti-collision positioning frame 341 and a second transmission swing seat shaft sleeve anti-collision positioning frame 342 are fixedly arranged on the round surface of the transmission swing seat shaft sleeve 34, the first transmission swing seat shaft sleeve anti-collision positioning frame 341 and the second transmission swing seat shaft sleeve anti-collision positioning frame 342 are L-shaped, one surfaces of the first transmission swing seat shaft sleeve anti-collision positioning frame 341 and the second transmission swing seat shaft sleeve anti-collision positioning frame 342 are fixed on the transmission swing seat shaft sleeve 34, the other vertical surface is provided with an adjusting screw hole, two anti-collision adjusting screws 343 are fastened on the two adjusting screw holes, nuts of the two anti-collision adjusting screws 343 are oppositely arranged between the first transmission swing seat shaft sleeve anti-collision positioning frame 341 and the second transmission swing seat shaft sleeve anti-collision positioning frame 342, the screw teeth face outwards or inwards, the screw teeth abut against the sewing machine body when the transmission swing seat shaft sleeve 34 operates, and the anti-collision adjusting screws 343 are used for adjusting, so that the adjusting transmission swing seat shaft sleeve 34 has a device for adjusting the operation amplitude when receiving the swing source of the rotary connecting fork rod 37, and can play a role in limiting the passing in and out of the adjusting screw according to the sewing requirement.

The transmission swing seat shaft sleeve 34 is movably connected with the feeding swing seat 33 by a needle pitch backstitch connecting rod 35 at one side close to the feeding swing seat 33, the needle pitch backstitch connecting rod 35 is movably connected with the transmission swing seat shaft sleeve 34, the needle pitch backstitch connecting rod 35 is also movably connected with the feeding swing seat 33, a swing positioning rod 36 is further arranged between the needle pitch backstitch connecting rod 35 and the transmission swing seat shaft sleeve 34, the swing positioning rod 36 is movably connected with the needle pitch backstitch connecting rod 35, and the swing positioning rod 36 is movably connected with the transmission swing seat shaft sleeve 34. In the swing positioning lever 36 of the present application, the longer the swing positioning lever 36 is installed, the larger the needle pitch, and conversely, the smaller the needle pitch. The swing positioning rod 36 is provided with a positioning hole capable of adjusting the length of the connection, and the corresponding positions of the movable connection are fixed according to different length requirements, so that different connection lengths are realized corresponding to different needle pitches. The best needle pitch control scheme is that a needle pitch value is input on an operation control panel of the sewing machine and is completed by software direct control operation, so that the sewing intelligence is further improved, and the arrangement of the swing positioning rod 36 enables the needle pitch backstitch connecting rod 35 and the transmission swing seat shaft sleeve 34 to be more smoothly in movable connection.

The feeding swing base 33 is connected to the feeding shaft 31, and the feeding link 32 transmits a swing source generated by the operation of the spindle motor to the feeding swing base 33. Two feeding long swing plates 392 and two feeding short swing plates 394 are further arranged in the feeding swing seat 33, the feeding connecting rod 32 is arranged between the two feeding short swing plates 394, the two feeding long swing plates 392 are arranged between the two feeding short swing plates 394, and the feeding swing plate positioning pins 393 fix the feeding connecting rod 32, the two feeding long swing plates 392 and the two feeding short swing plates 394 on the feeding swing seat 33; the feeding swing seat 33 indirectly transmits the swing source to the feeding shaft 31, a feeding crank assembly 391 and two feeding long swing plates 392 are arranged between the feeding swing seat 33 and the feeding shaft 31, the two feeding long swing plates 392 connected with the feeding swing seat 33 are further connected with one end of the feeding crank assembly 391, the two feeding long swing plates 392 are movably connected with the feeding crank assembly 391, and the other end of the feeding crank assembly 391 is connected and fixed on the feeding shaft 31.

As another proposal, the application provides that the automatic regulating mechanism 30 for the stitch length of the free pattern sewing of the reinforced seams comprises a driving source 10, a compound driving wheel 13, a feeding shaft 31, a feeding connecting rod 32, a feeding swinging seat 33, a rotary connecting fork rod 37, a feeding crank component 391, a feeding long swinging plate 392 and a feeding swinging plate positioning pin 393. The device is basically the same as the above embodiment, except that a transmission swing seat shaft sleeve 34, a needle pitch backstitch connecting rod 35 and a swing positioning rod 36 are not arranged, a rotary connecting fork rod 37 is connected with a feeding swing seat 33 to realize the seam reinforcing action, and other arrangements are the same, and the same technical effect can be achieved.

In fig. 1, 4, 5 and 6, the thread releasing mechanism 50 of the present application includes: the thread slacking device comprises a driving source 10, a composite driving wheel 13, a thread slacking pressing plate 51, a thread slacking wire hose 52, a thread slacking device mounting bracket 53, a thread slacking device supporting plate 54, a copper sleeve 55, a steel wire 57 and a thread slacking device ejector rod 56. The composite transmission wheel 13 is also provided with a thread releasing salient point 133 (in fig. 8) on the other side with the swinging column 131, and the thread releasing salient point 133 is used for triggering the thread releaser ejector rod 56 so as to realize the starting of the thread releasing action. The thread loosening device mounting bracket 53 is fixed on a sewing machine body provided by the application, the thread loosening device mounting bracket 53 is integrated with the thread loosening device supporting plate 54, the thread loosening device mounting bracket 53 is provided with the thread loosening device ejector rod 56 on one side of the corresponding thread loosening salient point 133, and the thread loosening salient point 133 acts on the thread loosening device ejector rod 56 to trigger the thread loosening mechanism 50 to operate.

A copper bush 55 is arranged between the thread loosening device ejector rod 56 and the thread loosening device mounting bracket 53, a steel wire 57 is connected to the thread loosening device supporting plate 54, and the arrangement of the copper bush 55 enables the thread loosening device ejector rod 56 to move in and out more stably; the thread loosening press plate 51 is fixed on the machine body provided by the application, the thread loosening steel wire hose 52 is fixed on the thread loosening press plate 51, and the steel wire 57 penetrates through the thread loosening steel wire hose 52.

In the thread loosening operation of the thread loosening mechanism 50, the drive source 10 extends 30 degrees clockwise from the 30-degree rotation angle of the stitch length automatic adjusting mechanism 30 of the free stitch pattern of the gusset seam to form a thread loosening operation region, and the 30 degrees is the operation rotation angle of the thread loosening operation, and the thread cutting operation of the thread cutting mechanism 20 is performed almost simultaneously.

In fig. 1, fig. 5 and fig. 9, an intelligent multifunctional sewing machine according to the present application includes a thread trimming mechanism 20, wherein the thread trimming mechanism 20 includes a driving source 10, a thread trimming crank 21, a thread trimming fork 22, a thread trimming swing seat 23, and a terminal execution cutting assembly. The thread cutting crank 21 is a pushing part, the thread cutting crank 21 is a pushed part, wherein the thread cutting crank 21 is provided with a rotating ball 211, the thread cutting fork wheel 22 is provided with a thread cutting acting surface 221 and a thread cutting return surface 222, the thread cutting acting surface 221 and the thread cutting return surface 222 are arranged inside the thread cutting fork wheel 22, and the thread cutting fork wheel 22 is movably connected and fixed on the thread cutting swinging seat 23.

The front output shaft 11 is provided with a fixed pushing piece thread cutting crank 21, and a shaft fixing hole formed in the thread cutting crank 21 is used for being fixedly arranged on the front output shaft 11 in a penetrating mode. The rotary ball 211 of the thread cutting crank 21 is located at the rocker end of the thread cutting crank 21, the rotary ball 211 rotates at the rocker end of the thread cutting crank 21 under the operation of the driving source 10, the thread cutting acting surface 221 of the thread cutting fork wheel 22 driven by the driving part is opposite to the thread cutting return surface 222, the rotary ball 211 is located between the thread cutting acting surface 221 and the thread cutting return surface 222, and the rotary ball 211 pushes the thread cutting acting surface 221 to rotate in the thread cutting fork wheel 22 to cut threads.

In this embodiment, the thread cutting crank 21 of the pushing member applies a rotational thrust to the thread cutting fork wheel 22 of the pushed member, specifically, the rotating ball 211 applies a rotational thrust to the thread cutting action surface 221, so that the thread cutting fork wheel 22 rotates on the thread cutting swing seat 23 and drives the tail end execution cutting assembly to execute thread cutting. The driving source 10 rotates clockwise within the operation angle to make the thread cutting crank 21 drive the thread cutting fork wheel 22, and the driving source 10 rotates clockwise within the operation angle to complete the thread cutting action.

After the thread cutting operation is completed, the driving source 10 drives the thread cutting crank 21 to continue to rotate clockwise. After the thread cutting is completed, the rotating ball 211 of the thread cutting crank 21 firstly runs and is separated from the thread cutting action surface 221, the driving source 10 continues to run, the rotating ball 211 contacts and pushes against the thread cutting return surface 222, and the thread cutting crank 21 and the thread cutting fork wheel 22 return to the initial positions through the continuous running. In the operation of actual trimming, after the trimming is accomplished, owing to make up the in-process and can appear trimming mechanism and reset phenomenon such as being blocked, change ball 211 and continue to operate after accomplishing the trimming and drive whole trimming fork wheel 22 and force the reseing for the sewing machine can reset smoothly under the fault condition, and this application has higher processing fault ability. In the existing thread cutting technology of the sewing machine, after thread cutting is finished, a forced reset mechanism needs to be arranged and a motor needs to be operated in a reverse rotation mode to execute forced reset action.

In the thread cutting operation of the thread cutting mechanism 20, the drive source 10 extends 30 degrees clockwise at the 30-degree corner of the stitch length automatic adjusting mechanism 30 of the free sewing pattern of the reinforced seam, and the 30 degrees is the operation corner of the thread cutting operation, the thread cutting operation region and the thread loosening operation region are actually performed in the same region, and only operate in the same region, and the difference between the two operation start times is not large. After the thread cutting action and the thread loosening action are finished, the sewing action of the sewing machine needs to execute the action of lifting the presser foot.

Fig. 1, 4 and 6 show a presser foot lifting mechanism 40 of the present application. The presser foot lifting mechanism 40 of the present application includes a driving source 10, a compound transmission wheel 13, a presser foot lifting ejector rod 41 and a presser foot lifting top plate 42. One end of the presser foot lifting top plate 42 is fixed on the feeding shaft 31, the other end of the presser foot lifting top plate 42 is provided with a support plate 421 capable of supporting against the presser foot lifting ejector rod 41, and the support plate is directly supported against the upper part of the support plate 421 by the presser foot lifting ejector rod 41.

The compound transmission wheel 13 has a presser foot lifting cam portion 134 (in fig. 8), and the presser foot lifting cam portion 134 has a presser foot lifting peak 190. The driving source 10 drives the compound transmission wheel 13, the presser foot lifting cam part 134 rotates to gradually abut against the presser foot lifting top plate 42, the presser foot lifting cam part 134 rotates and starts to contact the abutting plate 421 to gradually reach the presser foot lifting peak 190, the presser foot lifting cam part 134 generates high-low position change along with the operation of the driving source 10, the cam part of the presser foot lifting cam part 134 acts on the lower part of the abutting plate 421, the lifting and descending of the abutting plate 421 enable the presser foot lifting push rod 41 to lift and descend along with the abutting plate 421, the presser foot lifting push rod 41 makes top-to-bottom displacement to realize the lifting and descending of the presser foot, and the presser foot lifting cam part 134 acts on the presser foot lifting top plate 42 to realize the presser foot lifting action. It should be noted that under the driving of the driving source 10, the presser foot lifting peak 190 of the presser foot lifting cam portion 134 can be reached from either clockwise or counterclockwise direction, the manner of realizing presser foot lifting of the intelligent sewing machine is flexible, and the defect of lagging of sewing action in the prior art is obviously improved.

The presser foot is operated by the presser foot cam portion 134 of the compound transmission wheel 13 abutting against the presser foot top plate 42, and the presser foot top plate 42 is actually a lever using the connecting feed shaft 31 as a fulcrum, and here, it is particularly emphasized that the realization by the above lever principle is all the protection scope of the present application, for example, by the concave-convex lever, the seesaw, and the like.

It should be noted that the time for triggering the thread slacking convex point 133 to push the thread cutting action surface 221 of the thread slacking device ejector rod 56 and the thread cutting crank 21 to push the thread cutting fork wheel is slightly earlier than the time for contacting the pressing foot lifting contact point of the pressing foot lifting cam part 134 with the abutting plate 421, so that the operation flow of firstly slacking and cutting the thread and then lifting the pressing foot is realized, the operation habit of the existing sewing machine is met, and the driving source 10 is adopted to realize four sewing actions, so that the four sewing actions have higher popularization value.

With reference to the attached drawings, the intelligent multifunctional sewing machine provides a corresponding sewing control system for the thread trimming mechanism 20, the pattern stitch pitch automatic adjusting mechanism 30 for free sewing of the reinforced seam, the presser foot lifting mechanism 40 and the thread loosening mechanism 50, so that the driving source 10 can realize respective functions in the corner operation, and the overall performance of the sewing machine operation is improved. Under the driving of the driving source 10, the front output shaft 11 drives the thread cutting crank 21; the compound driving wheel 13 drives the rotary connecting fork rod 37, the presser foot lifting top plate 42 and the thread loosening device ejector rod 56 in sequence to realize the actions of thread trimming, back and forth stitch reinforcement, presser foot lifting and thread loosening, a needle pitch adjusting area 15, a thread trimming and thread loosening area 18 and a presser foot lifting area 19 are arranged on a system corresponding to the sewing actions, wherein the needle pitch adjusting area 15 comprises a needle pitch adjusting negative value area 17 and a needle pitch adjusting positive value area 16, the needle pitch adjusting negative value area 17 is adjacent to the needle pitch adjusting positive value area 16, the presser foot lifting area 19 is adjacent to the needle pitch adjusting positive value area 16, and the thread trimming and thread loosening area 18 is arranged between the presser foot lifting area 19 and the needle pitch adjusting negative value area 17. The presser foot lifting area 19 has a presser foot lifting peak 190, a first presser foot lifting area 191 is provided between the thread trimming loosening area 18 and the presser foot lifting peak 190, and a second presser foot lifting area 192 is provided between the needle pitch adjustment positive value area 16 and the presser foot lifting peak 190.

The negative pitch adjustment area 17 and the positive pitch adjustment area 16 are zero pitch points. In the negative needle pitch adjustment area 17 and the positive needle pitch adjustment area 16, the needle pitch adjustment of the driving source 10 is performed at different angles within the rotation angle, and the driving source 10 drives the swing post 131 to be positioned at the front positioning portion 373 and/or the rear positioning portion 374 of the rotary joint yoke 37 to perform the transmission of the swing source.

When the sewing machine needs to perform thread cutting and loosening in the needle pitch adjustment negative value area 17, the driving source 10 drives the swing column 131 to abut against the limiting arc surface 372 to operate, so that the rotary connection fork rod 37 is in a static state, the driving source 10 can perform the thread cutting and loosening action, and the sewing machine directly and clockwise enters the thread cutting and loosening area 18 to perform the thread cutting and loosening action. After the sewing machine is in the thread trimming and loosing area 18, the sewing machine directly enters a first presser foot lifting area 191 of the presser foot lifting area 19 clockwise to reach a presser foot lifting highest point 190 to realize the presser foot lifting action; after the presser foot lifting action is completed, the sewing machine returns to the needle distance adjusting negative value area 17 from the presser foot lifting highest point 190 through the presser foot lifting first area 191, here, the sewing machine can also return to the needle distance adjusting negative value area 17 from the presser foot lifting highest point 190 through the presser foot lifting second area 192, the action is finished at one step, the action does not need to be executed and the corresponding initial position needs to be returned, unnecessary operation is avoided, the driving source 10 does not have dead angles within 360 degrees and operates in each area to realize the actual working sequence of the sewing machine, and the working efficiency of the sewing machine is greatly improved.

When the sewing machine is in the positive value area 16 for adjusting the needle gauge, the positive value area 16 for adjusting the needle gauge starts to reach the presser foot lifting highest point 190 from the presser foot lifting second area 192 in the anticlockwise direction at the original point 14 to realize the presser foot lifting action, and after the presser foot lifting action is finished, the sewing machine returns to the original point 14 from the presser foot lifting highest point 190 to the presser foot lifting second area 192 in a clockwise direction.

The thread cutting and loosening area 18 extends clockwise from the negative stitch length adjusting area 17, and the thread cutting and loosening action is realized by clockwise operation of the driving source 10 in the corner; after the thread trimming and the thread loosening are finished, the presser foot lifting action is executed immediately, and the presser foot lifting action enters a presser foot lifting first area 191 from the clockwise direction of the thread trimming and thread loosening area 18 and then reaches a presser foot lifting highest point 190. Here, the sewing operation requiring the presser foot lifting operation may return from the presser foot two-region 192 to the origin 14 at the presser foot lifting maximum point 190.

The above-mentioned adjacent place of the negative value area 17 of needle pitch regulation and the second area 192 of the lift foot is set as the origin 14, the above-mentioned origin 14 is on the line of the swing column 131 and the central point of the rear output shaft 12. In the present embodiment, the stitch length adjustment is embodied in the operation angle of the negative stitch length adjustment region 17 or the positive stitch length adjustment region 16 according to the actual sewing requirement, and the stitch length is described as 5 stitch lengths as follows: the positive needle pitch adjustment area 16 is located at the origin 14 and extends 20 to 45 degrees clockwise, the positive needle pitch adjustment area 16 extends 20 to 45 degrees clockwise at the negative needle pitch adjustment area 17, and the negative needle pitch adjustment area 17 is 30 degrees. The 5 pitches exemplified above do not limit the adjustment angle of the present application to the above range, and here, it is explained that the specific pitch adjustment is the operation angle adjustment of each area, and different pitches correspond to different operation angles.

The control system technology of the application effectively solves the problem that the prior art controls each sewing action in a running corner through the driving source 10

The problem that the automation degree of the sewing machine is not high is solved, so that the sewing machine can automatically enter the next corresponding sewing action after each sewing action is finished, and the sewing intelligence is improved.

Of course, in the swing positioning lever 36 of the present application, the longer the swing positioning lever 36, the larger the needle pitch, and conversely, the smaller the needle pitch. The optimal needle pitch control scheme includes that the needle pitch value is input on an operation control panel of the sewing machine and is controlled to run by software directly, and therefore the sewing intelligence is further improved.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (6)

1. The utility model provides a multi-functional sewing machine of intelligence, is including driving source (10), trimming crank (21) and trimming fork wheel (22), its characterized in that, the revolving ball (211) that driving source (10) drove trimming fork wheel (22) exert the revolving force to trimming action face (221) and carry out the trimming, and driving source (10) drive trimming return surface (222) are pushed down in the operation of revolving ball (211) of trimming fork wheel (22).

2. An intelligent multifunctional sewing machine according to claim 1, characterized in that the thread cutting fork wheel (22) rotates on the thread cutting swing seat (23) to drive the end execution cutting assembly.

3. An intelligent multifunctional sewing machine according to claim 1, characterized in that the thread cutting action surface (221) and the thread cutting return surface (222) are arranged inside the thread cutting fork wheel (22), and the thread cutting action surface (221) is arranged below the thread cutting return surface (222).

4. The intelligent multifunctional sewing machine according to claim 1, wherein the thread cutting crank (21) is fixedly mounted on the front output shaft (11), and the thread cutting crank (21) is provided with a shaft fixing hole for being fixedly arranged on the front output shaft (11) in a penetrating manner.

5. An intelligent multifunctional sewing machine according to claim 1, characterized in that the rotary ball (211) is located at the rocker end of the trimming crank (21), and the rotary ball (211) runs at the rocker end under the operation of the driving source (10).

6. An intelligent multifunctional sewing machine according to claim 1, characterized in that the drive source (10) rotates clockwise within the operating angle to make the thread cutting crank (21) drive the thread cutting fork wheel (22).

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