WO2022213638A1 - 一种缝纫机传动结构及方法 - Google Patents
一种缝纫机传动结构及方法 Download PDFInfo
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- WO2022213638A1 WO2022213638A1 PCT/CN2021/135905 CN2021135905W WO2022213638A1 WO 2022213638 A1 WO2022213638 A1 WO 2022213638A1 CN 2021135905 W CN2021135905 W CN 2021135905W WO 2022213638 A1 WO2022213638 A1 WO 2022213638A1
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- WIPO (PCT)
- Prior art keywords
- presser foot
- tooth
- transmission mechanism
- thread trimming
- lifting
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 144
- 238000009958 sewing Methods 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 177
- 238000009966 trimming Methods 0.000 claims description 169
- 230000008569 process Effects 0.000 claims description 30
- 230000009471 action Effects 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 12
- 230000007423 decrease Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 6
- 239000013013 elastic material Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 208000034423 Delivery Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/24—Feed-dog lifting and lowering devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/10—Electrical or electromagnetic drives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/66—Disintegrating fibre-containing textile articles to obtain fibres for re-use
Definitions
- the present invention relates to a sewing machine, and more particularly to a sewing machine transmission structure and method.
- sewing machines ie, lockstitch machines
- a main shaft a tooth frame, a feed dog, a feeding mechanism connected between the main shaft and the front end of the tooth frame, a tooth lifting mechanism connected between the main shaft and the rear end of the tooth frame, and a shear Line mechanism, presser foot lifting mechanism, etc.
- the main shaft is driven by the main motor to rotate, the main shaft drives the tooth frame and the feeding dog to reciprocate horizontally through the feeding mechanism, and the main shaft drives the tooth frame and the feeding dog to reciprocate vertically together through the tooth lifting mechanism.
- the feed tooth does a compound motion of back and forth reciprocating motion and up and down reciprocating motion, and its motion trajectory is similar to an ellipse.
- the thread trimming mechanism performs automatic thread trimming to cut the suture;
- the presser foot lifter mechanism performs automatic presser foot lift, and the presser foot is lifted upwards.
- the existing sewing machines have the following defects:
- the needle is driven by the operator by rotating the handwheel fixed at the end of the main shaft, so that the needle moves to the highest point, located on the needle plate.
- the feed dog also emerges from the tooth groove of the needle plate.
- the sewing material cannot be placed flat.
- the needle plate especially for thin elastic materials, the thin elastic materials are easily caught by the feed dog, resulting in uneven placement; and when the presser foot lift is low, it is difficult to smoothly put the thin elastic materials into the needle plate. below.
- the lifting height of the feed dog (that is, the distance from the upper surface of the needle plate when the feed dog moves to the highest point) is a fixed value, which is usually set according to the assembly process of the model, usually about 1mm.
- a fixed value which is usually set according to the assembly process of the model, usually about 1mm.
- the drive sources used by the thread trimming mechanism and the presser foot lifting mechanism are each an independent drive source.
- the thread trimming drive source of the thread trimming mechanism is only used to drive the thread trimming mechanism to perform automatic thread trimming.
- the presser foot lifting drive source of the presser foot lifting mechanism is only used to drive the presser foot lifting mechanism to perform an automatic presser foot lifting action, such as a sewing machine disclosed in a Chinese utility model patent application number 201821897744.8 ;
- the structure of the sewing machine is complicated, and the production cost of the sewing machine is increased.
- the sewing machine driven by electromagnet has high noise during operation and poor timing control stability, and the feed dog is located above the needle plate during thread trimming, resulting in long thread ends after thread trimming.
- the height of the automatic presser foot lift is a fixed assembly height. In the actual sewing process of the customer, it is not necessary to lift the presser foot in the middle of the process or to change the direction in the middle. It is not necessary to lift the presser foot in the full stroke.
- the automatic presser foot lifter with a fixed height is inconvenient for customers to use; while some sewing machines with knee lifter foot lifters need to overcome a large spring force, which is more laborious for users to use.
- the purpose of the present invention is to provide a sewing machine transmission structure and method, which adopts a driving source to realize automatic thread trimming, automatic presser foot lift and height adjustment of teeth.
- the present invention provides a transmission structure of a sewing machine, including a tooth adjustment transmission mechanism, a thread trimming transmission mechanism, a presser foot lifting transmission mechanism, a drive shaft, and a tooth adjustment transmission mechanism, a thread trimming transmission mechanism, and a presser foot lifting transmission mechanism.
- the tooth adjustment transmission mechanism includes the tooth adjustment crank, The tooth-adjusting shaft, the tooth-adjusting connecting rod, the tooth-adjusting tension spring, the tooth-adjusting crank is fixed on the tooth-adjusting shaft, the tooth-adjusting shaft is connected with the tooth-lifting swing seat, one end of the tooth-adjusting connecting rod is hinged with the tooth-adjusting crank, and the other end of the tooth-adjusting connecting rod is set.
- the tooth adjustment drive part is installed on the drive shaft, the tooth adjustment drive part is slidably connected with the avoidance groove, the tooth adjustment tension spring is connected between the tooth adjustment crank and the sewing machine, and the tooth adjustment drive part abuts on the end of the avoidance groove to drive the adjustment. tooth transmission mechanism action.
- a thread trimmer drive member and a presser foot lifter drive member are installed on the drive shaft;
- the thread trimmer drive member is provided with a thread trimmer cam surface, and the thread trimmer cam surface abuts on the thread trimmer transmission mechanism to drive the thread trimmer transmission mechanism to act;
- the presser foot driving member is provided with a presser foot lifter cam surface, and the presser foot lifter cam surface abuts on the presser foot lifter transmission mechanism to drive the presser foot lifter transmission mechanism to act.
- an axial screw is pierced in the avoidance groove of the tooth-adjusting link, and the tooth-adjusting driving member and the tooth-adjusting link are hingedly connected by the axial screw.
- the wire-cutting transmission mechanism includes a wire-cutting shaft and a wire-cutting assembly, one end of the wire-cutting shaft is drivingly matched with the wire-cutting driving member, and is driven to rotate by the wire-cutting driving member, and the other end of the wire-cutting shaft is connected to the wire-cutting mechanism.
- one end of the thread trimming shaft is integrally provided with a thread trimming crank arm, and a thread trimming roller is rotatably mounted on the thread trimming crank arm, and the thread trimming roller abuts and cooperates with the thread trimming cam surface.
- a thread trimmer reset protrusion is fixed on the arm of the thread trimmer crank, the thread trimmer reset protrusion and the thread trimmer roller are staggered, and the thread trimmer reset protrusion abuts and cooperates with the thread trimmer cam surface.
- the thread trimming mechanism includes a thread trimming crank fixed on the other end of the thread trimming shaft, a thread trimming connecting rod, a moving knife rest, and a fixed knife fixed on the sewing machine, and the two ends of the thread trimming connecting rod are respectively connected with the thread trimming crank and the moving knife.
- the knife rest is hinged, and the movable knife is fixed on the movable knife rest.
- the presser foot lift transmission mechanism includes a presser foot lifter shaft, a presser foot lifter crank, and a presser foot lifter ejector rod.
- the other end of the lifter shaft is fixed with one end of the lifter crank, the other end of the lifter crank is hinged with one end of the lifter rod, and the other end of the lifter is connected to the lifter mechanism.
- presser foot lifter shaft is integrally provided with a presser foot lifter crank arm, a rotatable presser foot lifter roller is installed on the presser foot lifter crank arm, and a presser foot lifter is provided on the outer peripheral surface of the presser foot lifter.
- the foot cam surface, and the presser foot lifter abuts and cooperates with the presser foot lifter cam surface.
- the presser foot lifter mechanism includes a right lever, a presser foot lifter lever, a left lever, a presser foot lifter, a presser foot guide, and a presser extending up and down, the presser foot lifter is hinged with one end of the right lever, and the right The other end of the lever is hinged with one end of the presser foot lifter rod, the other end of the presser foot lifter rod is hinged with one end of the left lever, and the other end of the left lever is hinged with the upper end of the presser foot lifter plate.
- There is a lifting hook part, a connecting protrusion engaging with the lifting hook part is arranged on the pressing rod guide frame, the pressing rod guide frame is fixed on the upper end of the pressing rod, and the pressing foot is installed on the lower end of the pressing rod.
- the tooth-adjusting transmission mechanism also includes a fixed seat fixed on the sewing machine and a buffer pad fixed on the fixed seat. When the tooth-adjusting crank is abutted and matched with the buffer pad, the height of the feeding dog is not greater than zero. .
- the tooth-adjusting drive part and the presser foot lifter drive part are combined into one integral part.
- a sewing machine transmission method is characterized in that, for realizing the action of the sewing machine transmission structure, the drive shaft has the following functional areas within a range of 360 degrees: the tooth adjustment area W1, 0 ⁇ t1; the thread trimming area W2, t2 ⁇ t4; thread trimming reset area W3, t4 ⁇ t6; presser foot lifting area after thread trimming W4, t5 ⁇ t7; separate presser foot lifting area W5, t8 ⁇ t10; t7 and t10 are the same corner of the drive motor;
- the drive shaft is kept at a value in the tooth adjustment area W1, the drive shaft does not move, and the sewing machine is kept at the effective height of the tooth;
- the drive shaft rotates from the current angle value in the tooth-adjustment area W1 to another angle value in the tooth-adjustment area W1, and the tooth-lifting height is adjusted through the tooth-adjusting transmission mechanism; after the adjustment, the drive shaft keeps At this angle value, keep the adjusted tooth lift height; when the drive shaft rotates in the tooth adjustment area W1, the thread trimming transmission mechanism does not act, and the presser foot lifting transmission mechanism does not act;
- the drive shaft rotates from the current corner value in the tooth adjustment area W1 to t4 in the thread trimming area W2.
- the drive shaft rotates through the corners of t1, t2 and t3 successively, and then rotates to t4.
- t3 corner is a corner value in the thread trimming area W2; first, from the current corner value in the tooth adjustment area W1 to t1, the height of the tooth lift gradually decreases; secondly, the drive shaft continues to rotate to t2, the height of the tooth lift Continue to decrease; after that, the drive shaft continues to rotate to t3, and the height of the tooth lift gradually decreases to zero; finally, the drive shaft continues to rotate to t4, the thread trimming transmission mechanism operates, and the height of the tooth lift is always zero;
- the presser foot lifter does not act; after the thread trimming is completed, the drive shaft continues to rotate from t4 to t6 in the thread trimming reset area W3 , the t6 corner is also a corner value in the presser foot lifting area; in this process, each component in the thread trimming transmission mechanism is reset; in the above process, after the drive shaft rotates through the t5 corner, the presser foot lifting transmission mechanism moves
- the drive shaft rotates reversely from the current corner value in the tooth adjustment area W1 to t10 in the separate presser foot lift area W5. Then rotate to t10 corner; first, the drive shaft rotates to 0, and the height of the lifting teeth gradually increases; secondly, the drive shaft rotates to t9, and the height of the feeding and lifting teeth gradually decreases to zero; then, the drive shaft rotates to t8 and t10 successively, Starting from the corner of t8, the presser foot lifting transmission mechanism continues to act to complete the automatic presser foot lifting; during the reverse rotation from t9 to t10, the height of the teeth is always zero; during the whole process of independent presser foot lifting, the thread trimming transmission mechanism No action.
- the transmission structure of the sewing machine involved in the present invention has the following beneficial effects:
- the drive shaft driven by the drive motor can act on the tooth-lifting swing seat in the tooth-lifting mechanism through the tooth-adjusting transmission mechanism, which can change the angle of the tooth-lifting swing seat and realize the adjustment of the height of the feeding tooth; the drive shaft can pass The thread trimming transmission mechanism acts on the thread trimming mechanism, so that the movable knife and the fixed knife in the thread trimming mechanism are engaged, and the thread is trimmed automatically; the drive shaft can also act on the presser foot lifting mechanism through the presser foot lifting transmission mechanism, and finally the presser foot moves up. , to achieve automatic presser foot lift.
- the present application adopts the same drive motor (ie, the drive source) to realize automatic thread trimming, automatic presser foot lift and height adjustment of the teeth, simplifying the structure of the sewing machine and reducing the production cost of the sewing machine; and the height of the sewing machine is adjustable, It can meet the sewing needs of different sewing materials and improve the applicability of the sewing machine.
- the drive motor ie, the drive source
- the drive motor is used as the drive source, and the output angle of the drive motor is controllable. Compared with the use of electromagnets as the drive source, the application can avoid collision of parts, greatly reduce noise, and especially control the lifting height of the presser foot. , to achieve different heights of the presser foot to meet the needs of different sewing scenarios, such as lifting the presser foot in the middle, reversing the presser foot in the middle, and floating sewing.
- the height of the feed dog is not greater than zero. At this time, even if the needle moves to the highest point and is above the needle plate, the feed dog will not emerge from the needle plate upward, so that the sewing machine has Bottom feeding function, so that the sewing material can be placed between the needle plate and the presser foot flatly, so as to avoid the problem that the feeding dog hangs on the sewing material and causes the sewing material to be placed unevenly and smoothly.
- the height of the feeding dog is not greater than zero, that is, the feeding dog will not emerge upward from the needle plate, so the feeding dog will not push upward. Raise the sewing material, shorten the distance between the sewing material and the moving knife and the fixed knife, thereby shortening the length of the thread remaining on the sewing material after thread trimming, stably realizing the trimming effect of short thread ends, and avoiding manual secondary trimming of thread ends. Improve sewing quality and efficiency.
- the pressure-adjusting tension spring is connected between the tooth-adjusting crank and the sewing machine, so that the pressure-adjusting crank is always pulled and stressed by the pressure-adjusting tension spring, so as to avoid the shaking of the feeding teeth due to the unstressed pressure-adjusting crank, which will affect the fabric quality. normal delivery.
- 1 to 3 are schematic structural diagrams of the sewing machine in the present application from different viewing angles.
- FIG. 4 and FIG. 5 are schematic structural diagrams of the tooth adjusting driver and the presser foot lifting driver in the application from different viewing angles.
- FIG. 6 is a schematic diagram of the structure of the thread trimmer driving member in the application.
- FIG. 7 is a schematic diagram of the rotation angle distribution of the drive motor in one revolution of the present application.
- FIG. 8 is a time sequence diagram of the tooth lifting height adjustment action, the thread trimming action and the presser foot lifting action when the drive motor runs for one circle in the present application.
- the present application provides a transmission structure for a sewing machine, and the corresponding model of the sewing machine is a lockstitch machine.
- the sewing machine has a casing, a main shaft 10 rotatably installed in the casing, and a main motor that drives the main shaft 10 to rotate.
- each direction is defined as follows: the axial direction of the main shaft 10 is defined as the left-right direction, the direction of the main shaft 10 toward the sewing machine head (ie, the needle side) is the left direction, and the main shaft 10 faces the sewing machine.
- the direction of the tail is the right direction; the moving direction of the sewing material when the sewing machine is sewing is defined as the forward direction; the direction orthogonal to the left-right direction and the front-rear direction is defined as the up-down direction.
- the sewing machine involved in the present application includes a main shaft 10 extending left and right, a bracket 20 , a feed dog 30 fixedly installed on the bracket 20 , and a feeding mechanism connected between the main shaft 10 and the front end of the bracket 20 .
- a feeding mechanism connected between the main shaft 10 and the rear end of the tooth frame 20, the tooth lifting mechanism, the thread trimming mechanism, the presser foot 40, the presser foot lifting mechanism, the drive motor 60, the tooth adjustment transmission mechanism, the thread trimming transmission mechanism, and the presser foot transmission mechanism mechanism.
- the main shaft 10 drives the tooth frame 20 and the feeding dog 30 to reciprocate back and forth through the feeding mechanism; the main shaft 10 drives the tooth frame 20 and the feeding dog 30 to reciprocate up and down through the tooth-lifting mechanism; in this way, the feeding dog 30 reciprocates back and forth and up and down. compound movement.
- the tooth-lifting mechanism includes a tooth-lifting shaft 131 parallel to the main shaft 10 , a first tooth-lifting transmission assembly connected between the main shaft 10 and the tooth-lifting shaft 131 , and a tooth-lifting shaft 131 connected between the rear end of the tooth frame 20 .
- the second tooth-lifting transmission assembly between them; the tooth-lifting shaft 131 is rotatably installed in the sewing machine casing; the first tooth-lifting transmission assembly includes the tooth-lifting eccentric 132 and the tooth-lifting connecting rod fixed and locked on the main shaft 10 by screws 133.
- the upper end of the tooth-lifting eccentric 132 is rotatably sleeved on the outer periphery of the eccentric part of the tooth-lifting eccentric wheel 132, and the lower end of the tooth-lifting link 133, one end of the first swinging plate 134 and one end of the second swinging plate 135 are connected together by a pin extending left and right.
- the shaft is hinged, the other end of the first swing plate 134 is hinged with the tooth-lifting swing seat 50 through a pin extending left and right, and the other end of the second swing plate 135 is hinged with the tooth-lifting crank 136 through a pin extending left and right; the tooth-lifting swing seat is hinged.
- the angle of 50 determines the transmission efficiency of the first tooth-lifting transmission assembly, that is, the transmission efficiency of the tooth-lifting mechanism, that is, the tooth-lifting height of the feeding dog 30.
- the thread trimming mechanism has a movable knife 111 that can swing reciprocatingly around the middle and lower shafts of the sewing machine.
- the presser foot lifting mechanism is connected with the presser foot 40 and drives the presser foot 40 to move upward.
- the tooth-adjusting transmission mechanism is connected between the drive shaft of the drive motor 60 and the tooth-lifting swing seat 50 in the tooth-lifting mechanism, and is used to change the inclination angle of the tooth-lifting swing seat 50, thereby changing the transmission efficiency of the transmission mechanism;
- the thread trimming transmission mechanism is connected between the drive shaft of the drive motor 60 and the thread trimmer mechanism;
- the presser foot lift transmission mechanism is connected between the drive shaft of the drive motor 60 and the presser foot lifter.
- the tooth adjustment transmission mechanism includes a tooth adjustment driving member 71 driven and rotated by the driving motor 60 , a tooth adjustment connecting rod 72 , a tooth adjustment crank 73 , and a rotatable support around the first fixed swing fulcrum.
- the driving member 71 is hinged by the axial screw 75 extending left and right, and the hinge point of the two is dislocated from the rotation center of the tooth adjusting driving member 71, and the other end of the adjusting rod 72 and the adjusting crank 73 are connected by a pin extending left and right.
- the teeth-adjusting crank 73 is fixed and locked on the left end of the teeth-adjusting shaft 74 by means of screws, the right end of the teeth-adjusting shaft 74 is fixed with the teeth-lifting swing seat 50, and the two fixing methods can be fixed by tight fitting, and the teeth-adjusting shaft 74 At the same time, it also constitutes the support shaft of the tooth-lifting swing seat 50 .
- the thread trimmer transmission mechanism includes a thread trimmer drive member 81 driven to rotate by a drive motor 60, and a thread trimmer shaft 82 rotatably supported in the sewing machine casing.
- the thread trimmer shaft 82 extends left and right, and the thread trimmer shaft The right end of the thread trimming shaft 82 is in driving cooperation with the thread trimming drive element 81, and is driven to rotate by the thread trimming drive element 81.
- the left end of the thread trimming shaft 82 is connected with the thread trimming mechanism.
- the presser foot lifter transmission mechanism includes a presser foot lifter driving member 91 driven to rotate by a driving motor 60 , a presser foot lifter shaft 92 rotatably supported in the sewing machine casing, and a presser foot lifter crank 93 , and the presser foot lifter rod 94, the presser foot lifter shaft 92 extends left and right, the left end of the presser foot lifter shaft 92 is driven and matched with the presser foot lifter driving member 91, and is driven to rotate by the presser foot lifter driving member 91, and the presser foot lift crank 93 It is fixed and locked on the right end of the presser foot lifter shaft 92 by screws.
- the presser foot lifter crank 93 is hinged with the lower end of the presser foot lifter top rod 94 through pins extending left and right, and the upper end of the presser foot lifter top rod 94 is connected with the presser foot lifter mechanism.
- the drive motor 60 maintains the tooth-lifting swing seat 50 at the working angle position through the tooth-adjusting transmission mechanism.
- the tooth-lifting height of the feeding dog 30 is the effective tooth-lifting height; the sewing machine can sew normally.
- the drive motor 60 rotates, and the tooth adjustment drive 71 is driven to rotate, and the tooth adjustment rod 72 and the tooth adjustment crank 73 are used to drive the tooth adjustment shaft 74 to rotate, and the tooth adjustment shaft 74 drives the tooth lift to swing.
- the seat 50 rotates synchronously, thereby changing the working angle of the tooth-lifting swing seat 50, thereby changing the tooth-lifting height of the feeding tooth 30 within the effective tooth-lifting height range, and realizing the adjustment of the tooth-lifting height of the feeding tooth 30.
- the driving motor 60 rotates and drives the thread trimming drive 81 to rotate, and the thread trimming drive 81 transmits the power to the thread trimming shaft 82 and drives the thread trimming shaft 82 to rotate, thereby driving the thread trimming mechanism to act to make the thread trimmer move.
- the movable knife 111 in the mechanism swings in a direction close to the fixed knife 115 until the movable knife 111 and the fixed knife 115 are engaged, and the suture is cut to realize automatic thread trimming.
- the driving motor 60 engages the movable knife 111 in the thread trimming mechanism with the fixed knife 115 through the thread trimming transmission mechanism to cut the suture
- the driving motor 60 acts on the tooth-lifting and swinging seat 50 through the tooth-adjusting transmission mechanism to make the feeding dog
- the height of the lifting teeth of 30 is not greater than zero, then the feeding dog 30 will not emerge upward from the needle plate, so that the sewing machine has the function of downward feeding, so the feeding dog 30 will not lift the sewing material upward when the thread is trimmed, shortening the sewing material and the movement.
- the distance between the occlusion of the knife 111 and the fixed knife 115 shortens the length of the thread remaining on the sewing material after thread trimming, stably realizes the trimming effect of short thread ends, avoids manual secondary trimming of thread ends, and improves sewing quality and efficiency.
- the drive motor 60 rotates, and the presser foot lifter drive 91 is driven to rotate.
- the presser foot lifter drive 91 transmits the power to the presser foot lifter shaft 92, drives the presser foot lifter shaft 92 to rotate, and the presser foot lifter crank 93
- the presser foot lifter shaft 92 rotates synchronously
- the presser foot lifter rod 94 drives the presser foot lifter mechanism to move, and drives the presser foot 40 to move up, so as to realize automatic presser foot lift.
- the drive motor 60 drives the presser foot lifter to act through the presser foot lifter transmission mechanism
- the drive motor 60 acts on the tooth lifter swing seat 50 through the tooth adjustment transmission mechanism, so that the height of the feed dog 30 is not greater than zero.
- the feed dog 30 will not emerge upward from the needle plate, so that the sewing machine has the function of downward feeding, so that the sewing material can be placed on the needle plate and the presser foot 40 flatly. In between, the problem that the feeding dog 30 hangs on the sewing material and causes the sewing material to be placed unevenly and smoothly is avoided.
- the present application adopts the same drive motor 60 (ie, the drive source) to realize automatic thread trimming, automatic presser foot lift and height adjustment of the teeth, simplifying the structure of the sewing machine and reducing the production cost of the sewing machine; and the height of the sewing machine is adjustable. , which can meet the sewing needs of different sewing materials and improve the applicability of the sewing machine.
- the present application adopts the driving motor 60 as the driving source, and the output angle of the driving motor 60 is controllable. Compared with the use of electromagnets as the driving source, the present application can avoid collision of parts, greatly reduce noise, and can especially control the presser foot.
- the lifting height of 40 can achieve different heights of the presser foot to meet the needs of different sewing scenarios, such as lifting the presser foot in the middle, lifting the presser foot in the middle of the reversing, and floating sewing.
- the present application realizes the lower feeding during thread trimming and lifting of the presser foot, so that the feed dog 30 does not emerge upward from the needle plate, so as to realize the thread trimming effect of short thread ends, and the sewing material can be placed flat and smoothly. into the narrow space between the needle plate and the presser foot 40.
- the tooth adjusting driving member 71 , the thread trimming driving member 81 and the presser foot lifting driving member 91 are all fixed on the driving shaft of the driving motor 60 by screws.
- the drive motor 60 is a dual-axis stepping motor.
- the tooth adjusting drive member 71 and the presser foot lifter drive member 91 are both fixed on the drive shaft on the right side of the drive motor 60
- the thread trimmer drive member 81 is fixed on the drive shaft on the left side of the drive motor 60 .
- the layout of each functional mechanism in the sewing machine is more reasonable, and the limited space in the sewing machine can be fully utilized.
- the tooth adjusting driving member 71 and the presser foot lifting driving member 91 may be two independent components; but preferably, in the present application, as shown in FIG. 4 and FIG. 5 , the tooth adjusting driving member 71 and the lifting presser The foot driving member 91 is combined into an integral piece, the left part of the integral piece is the presser foot lifting driving piece 91 , and the right part of the integral piece is the tooth adjusting driving piece 71 .
- the tooth-adjusting transmission mechanism, the thread-cutting transmission mechanism, and the presser foot-lifting transmission mechanism are provided with corresponding avoidance.
- the structure preferably the structure is as follows.
- an escape groove 721 is provided at one end of the adjusting rod 72 connected to the adjusting driving member 71 , and the escape groove 721 extends along the length direction of the adjusting rod 72 for hingedly connecting the adjusting rod.
- 72 and the axial screw 75 of the tooth-adjusting drive member 71 are inserted into the avoidance groove 721 and slidably cooperate with the avoidance groove 721, and the avoidance groove 721 constitutes the avoidance structure of the tooth-adjustment transmission mechanism.
- the axial screw 75 abuts against and cooperates with the end of the escape groove 721 , so that there is power transmission between the tooth adjustment driving member 71 and the tooth adjustment link 72 .
- the tooth adjustment transmission mechanism also includes a fixed seat 76 fixed on the sewing machine casing, a buffer pad 77 fixed on the fixed seat 76, and a tooth adjustment tension spring 78. The two ends of the tooth adjustment tension spring 78 are respectively connected to the sewing machine casing and the sewing machine.
- the tooth-adjusting crank 73 is connected to each other; in the thread trimming mechanism, during the stroke of the rear section of the movable knife 111 and the process of lifting the presser foot, the drive motor 60 keeps the tooth-adjusting crank 73 through the tooth-adjusting drive member 71 and the tooth-adjusting connecting rod 72 In a state of abutting and engaging with the buffer pad 77, at this time, the height of the feed dog 30 is zero.
- the right end of the thread trimming shaft 82 is integrally provided with a thread trimming crank arm 821, and a thread trimming roller 83 is rotatably mounted on the thread trimming crank arm 821; as shown in FIG.
- the outer peripheral surface of the wire driving member 81 is provided with a thread trimming cam surface 811 ; the thread trimming roller 83 can abut against and cooperate with the thread trimming cam surface 811 .
- the drive motor 60 drives the thread trimmer drive member 81 to rotate, and the variable diameter section on the thread trimmer cam surface 811 of the thread trimmer drive member 81 abuts and cooperates with the thread trimmer roller 83, thus pushing the thread trimmer roller 83, Therefore, the thread trimming shaft 82 having the thread trimming crank arm portion 821 is driven to rotate, and the movable knife 111 in the thread trimming mechanism is driven to swing in a direction close to the fixed knife 115 .
- the drive motor 60 also drives the thread trimmer drive member 81 to rotate, the equal diameter section on the thread trimmer cam surface 811 of the thread trimmer drive member 81 is different from the thread trimmer.
- the rollers 83 are in contact with each other, or the thread trimmer drive member 81 and the thread trimmer roller 83 are separated and not in contact, so as to form the avoidance structure of the thread trimmer transmission mechanism, interrupt the power transmission between the thread trimmer drive member 81 and the thread trimmer shaft 82, and cut the thread.
- the wire mechanism does not operate.
- the thread trimming mechanism includes a thread trimming crank 112 fixed on the left end of the thread trimming shaft 82, a thread trimming link 113, a moving knife rest 114, and a fixed knife 115 fixed on the sewing machine casing, Both ends of the thread trimming link 113 are hinged with the thread trimming crank 112 and the movable knife rest 114 respectively, and the movable knife 111 is fixed on the movable knife rest 114 .
- the thread trimmer crank arm 821 is integrally provided with a thread trimmer reset protrusion 822 , the thread trimmer reset protrusion 822 and the thread trimmer roller 83 are dislocated, and the thread trimmer reset protrusion 822 abuts against the thread trimmer cam surface 811
- the drive motor 60 drives the thread trimming drive member 81 to continue to rotate, and the thread trimming cam surface 811 on the outer circumference of the thread trimmer drive member 81 will abut and cooperate with the thread trimmer reset protrusion 822 to push the thread trimmer.
- the protruding portion 822 is reset, thereby driving the thread trimming shaft 82 with the thread trimming crank arm portion 821 to rotate in the reverse direction, thus driving the various components in the thread trimming mechanism to reset, and the movable knife 111 returns to its initial position.
- the left end of the presser foot lifter shaft 92 is integrally provided with a presser foot lifter crank arm 921, and a rotatable presser foot lifter roller 95 is mounted on the presser foot lifter crank arm 921 to lift the presser foot.
- the outer peripheral surface of the foot driving member 91 is provided with a presser foot lifter cam surface 911 , and the presser foot lifter roller 95 abuts against and cooperates with the presser foot lifter cam surface 911 .
- the drive motor 60 drives the presser foot lifter driving member 91 to rotate, and the reducing section on the presser foot lifter cam surface 911 of the presser foot lifter driving member 91 abuts against and cooperates with the presser foot lifter roller 95, so as to push the lifter.
- the presser foot roller 95 drives the presser foot lifter shaft 92 with the presser foot lifter crank arm 921 to rotate.
- the presser foot 40 moves up.
- the driving motor 60 also drives the presser foot lifter 91 to rotate, the presser foot lifter cam surface 911 of the presser foot lifter
- the diameter section is in contact with the presser foot lifter roller 95, or the presser foot lifter driving member 91 and the presser foot lifter roller 95 are separated and not in contact, so that the avoidance structure of the presser foot lifter transmission mechanism is formed, and the connection between the presser foot lifter driving member 91 and the presser foot lifter driving member 91 is interrupted.
- the power transmission between the presser foot lifter shafts 92, the presser foot lifter mechanism does not act.
- the presser foot lifting mechanism includes a right lever 121 with a second fixed swinging fulcrum, a presser foot lifting rod 122, a left lever 123 with a third fixed swinging fulcrum, and a presser foot lifting plate 124, the pressure rod guide frame 125, and the pressure rod 126 extending up and down, the upper end of the presser foot lifter rod 94 is hinged with one end of the right lever 121, and the other end of the right lever 121 is hinged with one end of the presser foot lifter rod 122.
- the other end of the foot pull rod 122 is hinged with one end of the left lever 123, and the other end of the left lever 123 is hinged with the upper end of the presser foot lifting plate 124.
- the presser foot lifting plate 124 is provided with a lifting hook, and the pressure rod guide frame 125 There is a connecting protrusion engaging with the lifting hook, the pressing rod guide 125 is fixed on the upper end of the pressing rod 126 , and the pressing foot 40 is installed on the lower end of the pressing rod 126 .
- FIG. 7 and FIG. 8 are the timing diagrams of the tooth adjusting action, the thread trimming action and the presser foot lifting action of the driving motor 60 in one rotation of 360° in the present application.
- the curve S1 is the relationship curve between the height of the tooth lift and the rotation angle of the driving motor 60
- the curve S2 is the relationship between the height of the movable knife 111 (ie, the degree to which the movable blade 111 is close to the fixed blade 115 ) and the rotation angle of the driving motor 60
- the relationship curve, the curve S3 is the relationship curve between the height of the presser foot 40 and the rotation angle of the driving motor 60 .
- the drive shaft of the drive motor 60120 rotates within the range of 360 degrees in one circle, and the rotation angle of the drive shaft of the drive motor 60 has the following functional areas: the tooth adjustment area W1, 0 ⁇ t1; Thread trimming area W2, t2 ⁇ t4; thread trimming reset area W3, t4 ⁇ t6; presser foot lift area after thread trimming W4, t5 ⁇ t7; separate presser foot lift area W5, t8 ⁇ t10; t7 and t10 are drive motor 60 along the clockwise rotation direction of the drive shaft of the drive motor 60, 0 ⁇ t1 ⁇ t2 ⁇ t4 ⁇ t5 ⁇ t6 ⁇ t7 ⁇ t8.
- the control process of the sewing machine is as follows:
- the electric control module in the sewing machine controls the drive shaft of the drive motor 60 to maintain a value in the tooth adjustment area W1, and the drive motor 60 does not move, then the drive motor 60 makes the tooth lift through the tooth adjustment transmission mechanism.
- the swing seat 50 is maintained at its current position angle, and the sewing machine has an effective tooth lift height.
- the electric control module controls the drive shaft of the drive motor 60 to rotate from the current angle value in the tooth adjustment area W1 to another angle value in the tooth adjustment area W1, through the tooth adjustment transmission mechanism
- the transmission efficiency of the tooth-lifting mechanism during subsequent sewing is changed, thereby changing the tooth-lifting height of the feeding dog 30 .
- the effective lifting height of the feeding dog 30 ranges from 0.8 mm to 1.2 mm.
- the thread trimming mechanism does not act; in the presser foot lift transmission mechanism, the equal diameter section on the presser foot lifter cam surface 911 of the presser foot lifter driver 91 and the presser foot lifter roller 95
- the presser foot lifter mechanism does not act when the presser foot lifter mechanism is in contact with each other, or the presser foot lifter driving member 91 is separated from the presser foot lifter roller 95 and not in contact with each other.
- the electric control module controls the drive shaft of the drive motor 60 to rotate clockwise from the current rotation angle value in the tooth adjusting area W1 to t4 in the thread trimming area W2.
- the corner t3 is a corner value in the thread trimming area W2. Specifically, first, the drive shaft of the drive motor 60 rotates clockwise from the current rotation angle value in the tooth adjustment area W1 to t1.
- the drive motor 60 drives the tooth adjustment crank 73, the tooth adjustment shaft 74 and the tooth lifting swing seat 50 to swing through the tooth adjustment driving member 71 and the tooth adjustment connecting rod 72, and the tooth adjustment crank 73 is close to the fixed seat.
- the direction of the buffer pad 77 on the 76 swings, and the height of the feed dog 30 is gradually reduced to 0.8mm.
- the drive shaft of the drive motor 60 continues to rotate clockwise to t2, and the height of the feed dog 30 is gradually reduced to 0.65mm.
- the drive shaft of the drive motor 60 continues to rotate clockwise to t3, and the height of the feed dog 30 is gradually reduced to zero; that is, the drive motor 60 is at the corner of t3, and the tooth adjusting crank 73 is just in contact with the screw on the fixed seat 76.
- the buffer pad 77 is in abutment, and the height of the feed dog 30 is zero; however, during this process, the movable knife 111 in the thread trimming mechanism swings toward the fixed knife 115 and is in a knife-out state.
- the drive shaft of the drive motor 60 continues to rotate clockwise to t4.
- the moving knife 111 in the thread trimming mechanism continues to swing in the direction close to the fixed knife 115 until it engages at the corner of t4, but the axial screw 75 and the The relative sliding between the escape grooves 721 keeps the adjusting crank 73 in a state of abutting and cooperating with the buffer pad 77 on the fixing seat 76 , so the height of the feed dog 30 is always zero.
- the lifter of the presser foot lifter 91 If the equal diameter section on the presser foot cam surface 911 abuts against the presser foot lifter roller 95, or the presser foot lifter driver 91 is separated from the presser foot lifter roller 95 and does not contact, the presser foot lifter mechanism does not act.
- the drive shaft of the drive motor 60 continues to rotate clockwise from t4 to t6 in the thread trimming reset area W3, and the angle at t6 is also a value in the presser foot lift area; during this process, the thread trimming drive member 81 There is no power transmission with the thread trimming roller 83, and there is power transmission between the thread trimming driving member 81 and the thread trimming reset protrusion 822, which drives the various components in the thread trimming mechanism to reset, and the moving knife 111 returns to the knife.
- the drive motor 60 rotates through the corner t5
- the drive motor 60 drives the presser foot lifter to act through the presser foot lift transmission mechanism, and the presser foot 40 is slightly lifted by a height.
- the drive shaft of the drive motor 60 continues to rotate clockwise from t6 to t7 in the presser foot lifting area W4 after thread trimming.
- the motor 60 drives the presser foot-lifting mechanism to move continuously through the presser-foot-lifting transmission mechanism to complete the automatic presser foot lift.
- the axial screw 75 and the escape groove 721 slide relative to each other, and the tooth-adjusting crank 73 always maintains the position of abutting and matching with the buffer pad 77 on the fixed seat 76, and the lifting tooth of the feeding dog 30
- the height is always zero; in the thread trimmer transmission mechanism, the equal diameter section on the thread trimmer cam surface 811 of the thread trimmer drive member 81 abuts against the thread trimmer roller 83, or the thread trimmer drive member 81 is separated from the thread trimmer roller 83 No contact, the thread trimming mechanism does not act.
- the electronic control module controls the drive shaft of the drive motor 60 to rotate counterclockwise from the current rotation angle value in the tooth adjustment area W1 to t10 in the separate presser foot lift area W5.
- the drive of the drive motor 60 The shaft rotates through the 0, t9 and t8 corners successively, and then rotates to the t10 corner. Specifically, first, the drive shaft of the drive motor 60 rotates counterclockwise from the current rotation angle value in the tooth adjustment area W1 to 0. During this process, the height of the feed dog 30 is gradually increased to 1.2 mm.
- the drive shaft of the drive motor 60 continues to rotate counterclockwise to t9, and the height of the feed dog 30 is gradually reduced to zero; that is, when the drive motor 60 is at the corner of t9, the tooth adjusting crank 73 is just in contact with the buffer on the fixed seat 76. The pad 77 abuts and fits, and the height of the feed dog 30 is zero. Afterwards, the drive shaft of the drive motor 60 continues to rotate counterclockwise to t8 and t10 successively.
- the drive motor 60 drives the presser foot lifter to continue to move through the presser foot lift transmission mechanism to complete the automatic presser foot lift;
- the axial screw 75 and the avoidance groove 721 slide relatively, and the tooth adjustment crank 73 always maintains the position of abutting and matching with the buffer pad 77 on the fixed seat 76 state, the height of the feed dog 30 is always zero.
- the thread trimming cam surface 811 of the thread trimming drive member When the equal diameter section is in contact with the thread trimmer roller 83, or the thread trimmer driver 81 is separated from the thread trimmer roller 83 and not in contact, the thread trimmer mechanism does not operate.
- the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.
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Abstract
本发明提供一种缝纫机传动结构，包括调牙传动机构、剪线传动机构、抬压脚传动机构、驱动轴，调牙传动机构、剪线传动机构、抬压脚传动机构均由驱动轴提供动力；当驱动轴驱动剪线传动机构动作时以及驱动轴驱动抬压脚传动机构动作时，驱动轴与调牙传动机构之间的传动失效；调牙传动机构包括调牙曲柄、调牙轴、调牙连杆、调牙拉簧，调牙曲柄固定于调牙轴，调牙轴连接抬牙摆动座，调牙连杆一端与调牙曲柄铰接，调牙连杆另一端设有避让槽，驱动轴上安装调牙驱动件，调牙驱动件与避让槽滑动连接，调牙拉簧连接在调牙曲柄和缝纫机之间。本申请采用同一个动力源实现自动剪线、自动抬压脚和抬牙高度的调节，简化缝纫机的结构，降低缝纫机的生产成本。
Description
本发明涉及一种缝纫机，更具体地说是涉及一种缝纫机传动结构及方法。
目前，缝纫机(即平缝机)中都安装有主轴、牙架、送料牙、连接在主轴和牙架前端之间的送料机构、连接在主轴和牙架后端之间的抬牙机构、剪线机构、抬压脚机构等。缝纫过程中，主轴由主电机驱动转动，主轴通过送料机构驱动牙架和送料牙一起做水平方向的前后往复运动，主轴通过抬牙机构驱动牙架和送料牙一起做竖直方向的上下往复运动，故送料牙做前后往复运动和上下往复运动的复合运动，其运动轨迹为类似椭圆形。在缝纫结束后，剪线机构执行自动剪线，将缝线剪断；抬压脚机构执行自动抬压脚，压脚向上抬起。但是，现有的缝纫机存在下述缺陷：
1、当缝纫机停止时，为了能保证正常地将缝料放入压脚下方，机针由操作工通过转动固定在主轴端部的手轮驱动运动，使机针运动至最高点、位于针板以上，但由于机针和送料牙之间为同步连动，当机针位于针板上方时，送料牙也从针板的齿槽中向上冒出一部分，此时，无法将缝料平整地放在针板上，尤其对于弹性薄料，弹性薄料很容易被送料牙挂到而导致放置不平整；且在压脚抬起较低的情况下，弹性薄料很难顺利放入到针板下方。
2、送料牙的抬牙高度(即送料牙运动至最高点时距针板上表面的距离)为固定值，该固定值通常是根据机型的装配工艺设定的，通常为1mm左右。但是，市场上针对不同的缝料，需要使用不同的抬牙高度来进行缝纫，才能达到客户比较满意的线迹效果。很显然，抬牙高度固定的缝纫机不能满足该要求，其缝料适应性差。
3、剪线机构和抬压脚机构采用的驱动源都各自为一个独立驱动源，剪线机构的剪线驱动源仅用于驱动剪线机构执行自动剪线动作，比如申请号为201610494020.8的中国发明专利所公开的一种缝纫机；抬压脚机构的抬压脚驱动源仅用于驱动抬压脚机构执行自动抬压脚动作，比如申请号为201821897744.8的中国实用新型专利所公开的一种缝纫机；由此使得缝纫机结构复杂，并增加了 缝纫机的生产成本。同时，采用电磁铁驱动的缝纫机，运行过程中噪声较大，时序控制稳定性也差，且剪线时送料牙位于针板上方，导致剪线完成后线头较长。
4、自动抬压脚高度为固定装配高度，客户实际使用缝纫过程中，中途抬压脚或者中途换向要求不必满行程抬起压脚，现有缝纫机中的调速器后踏动作只能实现固定高度的自动抬压脚，客户使用不方便；而一些膝靠抬压脚的缝纫机需要克服较大的弹簧力，用户使用比较费力。
发明内容
鉴于以上所述现有技术的缺点，本发明的目的在于提供一种缝纫机传动结构及方法，采用一个驱动源实现自动剪线、自动抬压脚和抬牙高度的调节。
为实现上述目的，本发明提供一种缝纫机传动结构，包括调牙传动机构、剪线传动机构、抬压脚传动机构、驱动轴，调牙传动机构、剪线传动机构、抬压脚传动机构均由驱动轴提供动力；当驱动轴驱动剪线传动机构动作时以及驱动轴驱动抬压脚传动机构动作时，驱动轴与调牙传动机构之间的传动失效；调牙传动机构包括调牙曲柄、调牙轴、调牙连杆、调牙拉簧，调牙曲柄固定于调牙轴，调牙轴连接抬牙摆动座，调牙连杆一端与调牙曲柄铰接，调牙连杆另一端设有避让槽，驱动轴上安装调牙驱动件，调牙驱动件与避让槽滑动连接，调牙拉簧连接在调牙曲柄和缝纫机之间，调牙驱动件抵接到避让槽端部带动调牙传动机构动作。
进一步地，驱动轴上安装剪线驱动件、抬压脚驱动件；剪线驱动件上设有剪线凸轮面，剪线凸轮面抵接到剪线传动机构上带动剪线传动机构动作；抬压脚驱动件上设有抬压脚凸轮面，抬压脚凸轮面抵接到抬压脚传动机构上带动抬压脚传动机构动作。
进一步地，调牙连杆的避让槽中穿设轴位螺钉，调牙驱动件与调牙连杆通过轴位螺钉铰接。
进一步地，剪线传动机构包括剪线轴、剪线组件，剪线轴的一端与剪线驱动件传动配合、并由剪线驱动件驱动转动，剪线轴的另一端连接剪线机构。
进一步地，剪线轴的一端一体地设有剪线曲柄臂部，剪线曲柄臂部上安装有可转动地剪线滚子，剪线滚子与剪线凸轮面抵接配合。
进一步地，剪线曲柄臂部上固设有剪线复位突部，剪线复位突部与剪线滚子错位设置，剪线复位突部与剪线凸轮面抵接配合。
进一步地，剪线机构包括固定在剪线轴另一端的剪线曲柄、剪线连杆、动刀架、以及固定于缝纫机上的定刀，剪线连杆的两端分别与剪线曲柄和动刀架铰接，动刀固定在动刀架上。
进一步地，抬压脚传动机构包括抬压脚轴、抬压脚曲柄、以及抬压脚顶杆，抬压脚轴的一端与抬压脚驱动件传动配合、并由抬压脚驱动件驱动转动，抬压脚轴的另一端与抬压脚曲柄的一端相固定，抬压脚曲柄的另一端与抬压脚顶杆的一端铰接，抬压脚顶杆的另一端连接抬压脚机构。
进一步地，抬压脚轴的一端一体地设有抬压脚曲柄臂部，抬压脚曲柄臂部上安装有可转动地抬压脚滚子，抬压脚驱动件的外周面设有抬压脚凸轮面，抬压脚滚子与抬压脚凸轮面抵接配合。
进一步地，抬压脚机构包括右杠杆、抬压脚拉杆、左杠杆、抬压脚提升板、压杆导架、以及上下延伸的压杆，抬压脚顶杆与右杠杆的一端铰接，右杠杆的另一端与抬压脚拉杆的一端铰接，抬压脚拉杆的另一端与左杠杆的一端铰接，左杠杆的另一端与抬压脚提升板的上端相铰接，抬压脚提升板上设有提升钩部，压杆导架上设有与提升钩部相卡合的连接突部，压杆导架固定在压杆的上端，压脚安装在压杆的下端。
进一步地，调牙传动机构还包括固定于缝纫机的固定座、固定在固定座上的缓冲垫，当所述调牙曲柄与缓冲垫抵接配合时，所述送料牙的抬牙高度不大于零。调牙驱动件和抬压脚驱动件合为一个整体件。
一种缝纫机传动方法，其特征是，用于实现缝纫机传动结构的动作，在360度范围内驱动轴具有下述几个功能区：调牙区W1，0～t1；剪线区W2，t2～t4；剪线复位区W3，t4～t6；剪线后抬压脚区W4，t5～t7；单独抬压脚区W5，t8～t10；t7和t10为驱动电机的同一个转角；
a、缝纫机正常缝纫时，驱动轴保持在调牙区W1内的一个值，驱动轴不动作，缝纫机保持在有效的抬牙高度位置；
b、调节抬牙高度时，驱动轴从调牙区W1内的当前转角值转动至调牙区W1内的另一转角值，通过调牙传动机构调节抬牙高度；调节结束后，驱动轴保持在该转角值，保持调节后的抬牙高度；当驱动轴在调牙区W1内转动时，剪线传动机构不动作，抬压脚传动机构不动作；
c、自动剪线时，驱动轴从调牙区W1内的当前转角值转动至剪线区W2内的t4，上述过程中，驱动轴先后转过t1、t2和t3转角后、再转动至t4转角，t3转角为剪线区W2内的一个转角值；首先，从调牙区W1内的当前转角值转动至t1，抬牙高度逐渐减小；其次，驱动轴继续转动至t2，抬牙高度继续减小；再后，驱动轴继续转动至t3，抬牙高度逐渐减小至零；最后，驱动轴继续转动至t4，剪线传动机构动作，抬牙高度始终为零；上述驱动轴从调牙区W1内的当前转角值转动至剪线区W2内的t4的整个过程中，抬压脚传动机构不动作；剪线结束后，驱动轴从t4继续转动至剪线复位区W3内的t6，t6转角同时为抬压脚区内的一个转角值；该过程中，剪线传动机构中的各部件复位；上述过程中驱动轴转过t5转角后，抬压脚传动机构动作，略微上抬一个抬压脚高度；
d、剪线后抬压脚时，剪线结束且剪线传动机构复位后，驱动轴从t6继续转动至剪线后抬压脚区W4内的t7，此过程中，抬压脚传动机构持续动作，完成自动抬压脚，抬牙高度始终为零，剪线传动机构不动作；
e、独立抬压脚时，驱动轴从调牙区W1内的当前转角值反向转动至单独抬压脚区W5的t10，上述过程中，驱动轴先后转过0、t9和t8转角后、再转动至t10转角；首先，驱动轴转动至0，抬牙高度逐渐增加；其次，驱动轴转动至t9，送抬牙高度逐渐减小至零；再后，驱动轴先后转动至t8和t10，从t8转角开始，抬压脚传动机构持续动作，完成自动抬压脚；从t9反向转动至t10的过程中，抬牙高度始终为零；独立抬压脚的整个过程中，剪线传动机构不动作。
如上所述，本发明涉及的缝纫机传动结构，具有以下有益效果：
1、由驱动电机带动的驱动轴能通过调牙传动机构作用于抬牙机构中的抬牙摆动座，能够改变抬牙摆动座的角度，实现送料牙的抬牙高度的调节；驱动轴能通过剪线传动机构作用于剪线机构，使剪线机构中的动刀和定刀咬合，自动剪线；驱动轴还能通过抬压脚传动机构作用于抬压脚机构，最终使压脚上移，实现自动抬压脚。因此，本申请采用同一个驱动电机(即驱动源)实现自动剪线、自动抬压脚和抬牙高度的调节，简化缝纫机的结构，降低缝纫机的生产成本；且缝纫机的抬牙高度可调，能够满足不同缝料的缝制需求，提升了缝纫机的适用性。
2、采用驱动电机作为驱动源，驱动电机的输出转角可控，相对于采用电磁 铁作为驱动源而言，本申请能够避免产生零件碰撞、大大降低噪声，特别是能够控制压脚的抬起高度，实现不同的抬压脚高度，满足不同缝纫场景的需求，比如中途抬压脚、中途换向抬压脚、悬浮缝等。
3、在抬压脚时，送料牙的抬牙高度不大于零，此时，即使机针运动至最高点、位于针板以上，送料牙也不会从针板中向上冒出，使缝纫机具有下供功能，从而能够将缝料平整地放到针板和压脚之间，避免送料牙挂到缝料而导致缝料放置不平整、不顺利的问题。
4、在剪线机构中的动刀和定刀咬合、剪断缝线时，送料牙的抬牙高度不大于零，即送料牙不会从针板中向上冒出，故送料牙不会向上顶升缝料，缩短缝料与动刀和定刀咬合处的距离，由此缩短剪线后残留在缝料上的线头长度，稳定地实现短线头的剪线效果，避免人工二次修剪线头，提高缝纫质量和效率。
5、调压拉簧连接在调牙曲柄和缝纫机之间，使调压曲柄始终被调压拉簧拉着受力，避免因调压曲柄不受力而使送料牙出现抖动现象，影响布料的正常送料。
图1至图3为本申请中缝纫机在不同视角下的结构示意图。
图4和图5为本申请中调牙驱动件和抬压脚驱动件在不同视角下的结构示意图。
图6为本申请中剪线驱动件的结构示意图。
图7为本申请中驱动电机在运转一圈时转角分配示意图。
图8为本申请中驱动电机在运转一圈时抬牙高度调节动作、剪线动作和抬压脚动作的时序图。
元件标号说明
10 主轴
20 牙架
30 送料牙
40 压脚
50 抬牙摆动座
60 驱动电机
71 调牙驱动件
72 调牙连杆
721 避让槽
73 调牙曲柄
74 调牙轴
75 轴位螺钉
76 固定座
77 缓冲垫
78 调牙拉簧
81 剪线驱动件
811 剪线凸轮面
82 剪线轴
821 剪线曲柄臂部
822 剪线复位突部
83 剪线滚子
91 抬压脚驱动件
911 抬压脚凸轮面
92 抬压脚轴
921 抬压脚曲柄臂部
93 抬压脚曲柄
94 抬压脚顶杆
95 抬压脚滚子
111 动刀
112 剪线曲柄
113 剪线连杆
114 动刀架
115 定刀
121 右杠杆
122 抬压脚拉杆
123 左杠杆
124 抬压脚提升板
125 压杆导架
126 压杆
131 抬牙轴
132 抬牙偏心轮
133 抬牙连杆
134 第一摆动板
135 第二摆动板
136 抬牙曲柄
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。
须知，本说明书附图所绘的结构、比例、大小等，均仅用以配合说明书所揭示的内容，以供熟悉此技术的人士了解与阅读，并非用以限定本发明可实施的限定条件，故不具技术上的实质意义，任何结构的修饰、比例关系的改变或大小的调整，在不影响本发明所能产生的功效及所能达成的目的下，均应仍落在本发明所揭示的技术内容能涵盖的范围内。同时，本说明书中所引用的如“上”、“下”、“左”、“右”、“中间”及“一”等的用语，亦仅为便于叙述明了，而非用以限定本发明可实施的范围，其相对关系的改变或调整，在无实质变更技术内容下，当亦视为本发明可实施的范畴。
本申请提供一种缝纫机传动结构，所对应的缝纫机的机型为平缝机。具体说，缝纫机具有机壳、可转动地安装在机壳中的主轴10、以及驱动主轴10转动的主电机。为便于叙述，下述实施例中，各方向的定义如下：将主轴10的轴向定义为左右方向，主轴10朝向缝纫机机头(即机针侧)的方向为左方向，主轴10朝向缝纫机机尾的方向为右方向；将缝纫机正缝时缝料的移动方向定义为前方向；将与左右方向和前后方向都正交的方向定义为上下方向。
如图1和图2所示，本申请涉及的缝纫机包括左右延伸的主轴10、牙架20、固定安装在牙架20的送料牙30、连接在主轴10和牙架20前端之间的送料机构、 连接在主轴10和牙架20后端之间的抬牙机构、剪线机构、压脚40、抬压脚机构、驱动电机60、调牙传动机构、剪线传动机构、以及抬压脚传动机构。其中，主轴10通过送料机构驱动牙架20和送料牙30前后往复运动；主轴10通过抬牙机构驱动牙架20和送料牙30上下往复运动；如此，送料牙30做前后往复运动和上下往复运动的复合运动。进一步地，抬牙机构包括平行于主轴10的抬牙轴131、连接在主轴10和抬牙轴131之间的第一抬牙传动组件、以及连接在抬牙轴131和牙架20后端之间的第二抬牙传动组件；抬牙轴131可转动地安装在缝纫机机壳中；第一抬牙传动组件包括通过螺钉固定锁紧在主轴10上的抬牙偏心轮132、抬牙连杆133、具有第一固定摆动支点的抬牙摆动座50、第一摆动板134、第二摆动板135、以及通过螺钉固定锁紧在抬牙轴131右端的抬牙曲柄136，抬牙连杆133的上端可转动地套装在抬牙偏心轮132上偏心部的外周，抬牙连杆133的下端、第一摆动板134的一端和第二摆动板135的一端三者通过一左右延伸的销钉同轴铰接，第一摆动板134的另一端与抬牙摆动座50通过一左右延伸的销钉铰接，第二摆动板135的另一端与抬牙曲柄136通过一左右延伸的销钉铰接；抬牙摆动座50的角度决定第一抬牙传动组件的传动效率，也即决定抬牙机构的传动效率，也即决定送料牙30的抬牙高度。剪线机构中具有能够绕缝纫机中下轴往复摆动的动刀111。抬压脚机构与压脚40相连、驱动压脚40上移。
进一步地，调牙传动机构连接在驱动电机60的驱动轴与抬牙机构中的抬牙摆动座50之间，用于改变抬牙摆动座50的倾斜角度，由此改变传动机构的传动效率；剪线传动机构连接在驱动电机60的驱动轴与剪线机构之间；抬压脚传动机构连接在驱动电机60的驱动轴与抬压脚机构之间。
如图1至图3所示，调牙传动机构包括由驱动电机60驱动转动的调牙驱动件71、调牙连杆72、调牙曲柄73、以及能够绕第一固定摆动支点可转动地支撑在缝纫机机壳中的调牙轴74；调牙轴74左右延伸，抬牙摆动座50的第一固定摆动支点落在调牙轴74的中心轴线上；调牙连杆72的一端与调牙驱动件71通过左右延伸的轴位螺钉75相铰接、且两者的铰接点与调牙驱动件71的转动中心错位设置，调牙连杆72的另一端与调牙曲柄73通过左右延伸的销钉相铰接，调牙曲柄73通过螺钉固定锁紧在调牙轴74的左端，调牙轴74的右端与抬牙摆动座50相固定、且两者固定方式可以为紧配合固定，调牙轴74同时也构成抬牙摆动座50的支撑轴。
如图1至图3所示，剪线传动机构包括由驱动电机60驱动转动的剪线驱动件81、以及可转动地支撑在缝纫机机壳中的剪线轴82，剪线轴82左右延伸，剪线轴82的右端与剪线驱动件81传动配合、并由剪线驱动件81驱动转动，剪线轴82的左端与剪线机构相连。
如图1至图3所示，抬压脚传动机构包括由驱动电机60驱动转动的抬压脚驱动件91、可转动地支撑在缝纫机机壳中的抬压脚轴92、抬压脚曲柄93、以及抬压脚顶杆94，抬压脚轴92左右延伸，抬压脚轴92的左端与抬压脚驱动件91传动配合、并由抬压脚驱动件91驱动转动，抬压脚曲柄93通过螺钉固定锁紧在抬压脚轴92的右端，抬压脚曲柄93与抬压脚顶杆94的下端通过左右延伸的销钉铰接，抬压脚顶杆94的上端与抬压脚机构相连。
缝纫机作业过程中，驱动电机60通过调牙传动机构使抬牙摆动座50维持在工作角度位置，此时，送料牙30的抬牙高度为有效抬牙高度；缝纫机正常缝纫即可。需要调节送料牙30的抬牙高度时，驱动电机60转动，驱动调牙驱动件71转动，通过调牙连杆72和调牙曲柄73驱动调牙轴74转动，调牙轴74带动抬牙摆动座50同步转动，由此改变抬牙摆动座50的工作角度，从而在有效抬牙高度范围内改变送料牙30的抬牙高度，实现送料牙30的抬牙高度的调节。缝纫结束后需要剪线时，驱动电机60转动，驱动剪线驱动件81转动，剪线驱动件81将动力传递给剪线轴82、驱动剪线轴82转动，从而驱动剪线机构动作，使剪线机构中的动刀111向靠近定刀115的方向摆动，直至动刀111和定刀115咬合，将缝线剪断，实现自动剪线。并且，当驱动电机60通过剪线传动机构使剪线机构中的动刀111与定刀115咬合、剪断缝线时，驱动电机60通过调牙传动机构作用于抬牙摆动座50、使送料牙30的抬牙高度不大于零，则送料牙30不会从针板中向上冒出，使缝纫机具有下供功能，故剪线时送料牙30不会向上顶升缝料，缩短缝料与动刀111和定刀115咬合处的距离，由此缩短剪线后残留在缝料上的线头长度，稳定地实现短线头的剪线效果，避免人工二次修剪线头，提高缝纫质量和效率。需要自动抬压脚时，驱动电机60转动，驱动抬压脚驱动件91转动，抬压脚驱动件91将动力传递给抬压脚轴92、驱动抬压脚轴92转动，抬压脚曲柄93随抬压脚轴92同步转动，通过抬压脚顶杆94驱动抬压脚机构动作，驱动压脚40上移，实现自动抬压脚。并且，当驱动电机60通过抬压脚传动机构驱动抬压脚机构动作时，驱动电机60通过调牙传动机构作用于抬牙摆动座50、 使送料牙30的抬牙高度不大于零，此时，即使机针运动至最高点、位于针板以上，送料牙30也不会从针板中向上冒出，使缝纫机具有下供功能，从而能够将缝料平整地放到针板和压脚40之间，避免送料牙30挂到缝料而导致缝料放置不平整、不顺利的问题。
因此，本申请采用同一个驱动电机60(即驱动源)实现自动剪线、自动抬压脚和抬牙高度的调节，简化缝纫机的结构，降低缝纫机的生产成本；且缝纫机的抬牙高度可调，能够满足不同缝料的缝制需求，提升了缝纫机的适用性。另外，本申请采用驱动电机60作为驱动源，驱动电机60的输出转角可控，相对于采用电磁铁作为驱动源而言，本申请能够避免产生零件碰撞、大大降低噪声，特别是能够控制压脚40的抬起高度，实现不同的抬压脚高度，满足不同缝纫场景的需求，比如中途抬压脚、中途换向抬压脚、悬浮缝等。同时，本申请在剪线和抬压脚时都实现了下供，使送料牙30不从针板中向上冒出，从而实现短线头的剪线效果、以及能够将缝料平整且顺利地放入针板和压脚40之间的狭小空间中。本实施例中，如图8所示，当驱动电机60通过剪线传动机构使剪线机构中的动刀111与定刀115咬合时、以及当驱动电机60通过抬压脚传动机构驱动抬压脚机构动作时，送料牙30的抬牙高度为零。
进一步地，如图1和图2所示，调牙驱动件71、剪线驱动件81和抬压脚驱动件91都通过螺钉固定在驱动电机60的驱动轴上。驱动电机60为双轴步进电机，调牙驱动件71和抬压脚驱动件91都固定在驱动电机60右侧的驱动轴上，剪线驱动件81固定在驱动电机60左侧的驱动轴上，使得缝纫机中的各功能机构的布局更加合理，能够充分利用缝纫机内的有限空间。在此基础上，调牙驱动件71和抬压脚驱动件91可以为两个独立部件；但较优地，本申请中，如图4和图5所示，调牙驱动件71和抬压脚驱动件91合为一个整体件，该整体件的左侧部件为抬压脚驱动件91，该整体件的右侧部件为调牙驱动件71。
进一步地，为了保证抬牙高度调节动作、抬压脚动作、和剪线动作之间互不影响，调牙传动机构、剪线传动机构、以及抬压脚传动机构中都各自相应地设有避让结构，优选结构如下。
如图1至图3所示，调牙连杆72与调牙驱动件71相连的一端开设有避让槽721，避让槽721沿调牙连杆72的长度方向延伸，用于铰接调牙连杆72和调牙驱动件71的轴位螺钉75穿设在避让槽721中、并与避让槽721滑动配合，避让 槽721构成调牙传动机构的避让结构。在调节送料牙30的抬牙高度时，轴位螺钉75与避让槽721的端部抵接配合，使得调牙驱动件71和调牙连杆72之间有动力传递。在抬压脚过程中，轴位螺钉75在避让槽721中滑动，使得调牙驱动件71和调牙连杆72之间无动力传递，且送料牙30的抬牙高度被保持为零。另外，调牙传动机构还包括固定于缝纫机机壳的固定座76、固定在固定座76上的缓冲垫77、以及调牙拉簧78，调牙拉簧78的两端分别与缝纫机机壳和调牙曲柄73相连；在剪线机构中动刀111的后段出刀行程中、以及抬压脚过程中，驱动电机60通过调牙驱动件71和调牙连杆72使调牙曲柄73保持与缓冲垫77抵接配合的位置状态，此时，送料牙30的抬牙高度为零。
如图1至图3所示，剪线轴82的右端一体地设有剪线曲柄臂部821，剪线曲柄臂部821上安装有可转动地剪线滚子83；如图6所示，剪线驱动件81的外周面设有剪线凸轮面811；剪线滚子83能够与剪线凸轮面811抵接配合。需要剪线时，驱动电机60带动剪线驱动件81转动，剪线驱动件81的剪线凸轮面811上的变径段与剪线滚子83抵接配合，如此推动剪线滚子83，从而驱动具有剪线曲柄臂部821的剪线轴82转动，进而驱动剪线机构中的动刀111向靠近定刀115的方向摆动。在抬牙高度的调节过程中、以及在抬压脚过程中，驱动电机60虽然也带动剪线驱动件81转动，但剪线驱动件81的剪线凸轮面811上的等径段与剪线滚子83抵接配合、或者剪线驱动件81与剪线滚子83分离不接触，如此构成剪线传动机构的避让结构，中断剪线驱动件81与剪线轴82之间的动力传递，剪线机构不动作。
进一步地，如图1和图2所示，剪线机构包括固定在剪线轴82左端的剪线曲柄112、剪线连杆113、动刀架114、以及固定于缝纫机机壳的定刀115，剪线连杆113的两端分别与剪线曲柄112和动刀架114铰接，动刀111固定在动刀架114上。优选地，剪线曲柄臂部821上一体地设有剪线复位突部822，剪线复位突部822与剪线滚子83错位设置，剪线复位突部822与剪线凸轮面811抵接配合；剪线机构剪线结束后，驱动电机60带动剪线驱动件81继续转动，则剪线驱动件81外周的剪线凸轮面811会与剪线复位突部822抵接配合，推动剪线复位突部822，从而驱动具有剪线曲柄臂部821的剪线轴82反向转动，如此驱动剪线机构中的各部件复位，动刀111回刀至其初始位置。
如图1至图3所示，抬压脚轴92的左端一体地设有抬压脚曲柄臂部921， 抬压脚曲柄臂部921上安装有可转动地抬压脚滚子95，抬压脚驱动件91的外周面设有抬压脚凸轮面911，抬压脚滚子95与抬压脚凸轮面911抵接配合。需要抬压脚时，驱动电机60带动抬压脚驱动件91转动，抬压脚驱动件91的抬压脚凸轮面911上的变径段与抬压脚滚子95抵接配合，如此推动抬压脚滚子95，从而驱动具有抬压脚曲柄臂部921的抬压脚轴92转动，抬压脚轴92通过抬压脚曲柄93和抬压脚顶杆94驱动抬压脚机构动作，驱动压脚40上移。在抬牙高度的调节过程中、以及在剪线机构的出刀中，驱动电机60虽然也带动抬压脚驱动件91转动，但抬压脚驱动件91的抬压脚凸轮面911上的等径段与抬压脚滚子95抵接配合、或者抬压脚驱动件91与抬压脚滚子95分离不接触，如此构成抬压脚传动机构的避让结构，中断抬压脚驱动件91与抬压脚轴92之间的动力传递，抬压脚机构不动作。
进一步地，如图1和图2所示，抬压脚机构包括具有第二固定摆动支点的右杠杆121、抬压脚拉杆122、具有第三固定摆动支点的左杠杆123、抬压脚提升板124、压杆导架125、以及上下延伸的压杆126，抬压脚顶杆94的上端与右杠杆121的一端铰接，右杠杆121的另一端与抬压脚拉杆122的一端铰接，抬压脚拉杆122的另一端与左杠杆123的一端铰接，左杠杆123的另一端与抬压脚提升板124的上端相铰接，抬压脚提升板124上设有提升钩部，压杆导架125上设有与提升钩部相卡合的连接突部，压杆导架125固定在压杆126的上端，压脚40安装在压杆126的下端。
进一步地，图7和图8为本申请中驱动电机60在运转一圈360°内调牙动作、剪线动作和抬压脚动作的时序图。图8中，曲线S1为抬牙高度和驱动电机60的转角之间的关系曲线，曲线S2为动刀111高度(即动刀111接近定刀115的程度)和驱动电机60的转角之间的关系曲线，曲线S3为压脚40高度和驱动电机60的转角之间的关系曲线。另外，图8中曲线S1和曲线S2对应的高度值与竖轴h所标示的数值为1:1的关系，但图8中曲线S3对应的高度值与竖轴h所标示的数值为4:1的关系，即将图8中曲线S3对应的高度值缩小了4倍，便于更加清楚地比对曲线S1、曲线S2和曲线S3。从如图7和图8可知，驱动电机60120的驱动轴在转动一圈360度的范围内，驱动电机60的驱动轴的转角具有下述几个功能区：调牙区W1，0～t1；剪线区W2，t2～t4；剪线复位区W3，t4～t6；剪线后抬压脚区W4，t5～t7；单独抬压脚区W5，t8～t10；t7和t10为 驱动电机60的同一个转角；沿驱动电机60的驱动轴的顺时针转动方向，0＜t1＜t2＜t4＜t5＜t6＜t7＜t8。
缝纫机的控制过程如下：
一、缝纫机正常缝纫时，缝纫机中的电控模块控制驱动电机60的驱动轴保持在调牙区W1内的一个值、且驱动电机60不动作，则驱动电机60通过调牙传动机构使抬牙摆动座50保持在其当前的位置角度，缝纫机具有有效抬牙高度。
二、调节送料牙30的抬牙高度时，电控模块控制驱动电机60的驱动轴从调牙区W1内的当前转角值转动至调牙区W1内的另一转角值，通过调牙传动机构改变抬牙摆动座50的倾斜角度，由此改变后续缝纫时抬牙机构的传动效率，从而改变送料牙30的抬牙高度。本实施例中，送料牙30的有效抬牙高度范围为0.8mm～1.2mm。调节结束后，驱动电机60的驱动轴保持在该转角值，进而使抬牙摆动座50保持在调节后的位置角度，也就保持调节后的抬牙高度。当驱动电机60在调牙区W1内转动时，剪线传动机构中，剪线驱动件81的剪线凸轮面811上的等径段与剪线滚子83抵接配合、或者剪线驱动件81与剪线滚子83分离不接触，则剪线机构不动作；抬压脚传动机构中，抬压脚驱动件91的抬压脚凸轮面911上的等径段与抬压脚滚子95抵接配合、或者抬压脚驱动件91与抬压脚滚子95分离不接触，则抬压脚机构不动作。
三、自动剪线时，电控模块控制驱动电机60的驱动轴从调牙区W1内的当前转角值顺时针转动至剪线区W2内的t4，上述过程中，驱动电机60的驱动轴先后转过t1、t2和t3转角后、再转动至t4转角，t3转角为剪线区W2内的一个转角值。具体说，首先，驱动电机60的驱动轴从调牙区W1内的当前转角值顺时针转动至t1，此过程中，调牙传动机构中的轴位螺钉75与调牙连杆72上避让槽721的端部抵接配合，则驱动电机60通过调牙驱动件71和调牙连杆72驱动调牙曲柄73、调牙轴74和抬牙摆动座50摆动，调牙曲柄73向靠近固定座76上缓冲垫77的方向摆动，送料牙30的抬牙高度逐渐减小至0.8mm。其次，驱动电机60的驱动轴继续顺时针转动至t2，送料牙30的抬牙高度逐渐减小至0.65mm。再后，驱动电机60的驱动轴继续顺时针转动至t3，送料牙30的抬牙高度逐渐减小至零；即：驱动电机60在t3转角处，调牙曲柄73刚好与固定座76上的缓冲垫77抵接配合，送料牙30的抬牙高度为零；但是，此过程中，剪线机构中的动刀111向靠近定刀115的方向摆动、处于出刀状态。最后，驱动电机60的驱动 轴继续顺时针转动至t4，此过程中，剪线机构中的动刀111继续向靠近定刀115的方向摆动、直至在t4转角处咬合，但轴位螺钉75和避让槽721之间相对滑移，使调牙曲柄73始终保持与固定座76上的缓冲垫77抵接配合的位置状态，故送料牙30的抬牙高度始终为零。另外，上述驱动电机60的驱动轴从调牙区W1内的当前转角值顺时针转动至剪线区W2内的t4的整个过程中，抬压脚传动机构中，抬压脚驱动件91的抬压脚凸轮面911上的等径段与抬压脚滚子95抵接配合、或者抬压脚驱动件91与抬压脚滚子95分离不接触，则抬压脚机构不动作。
剪线结束后，驱动电机60的驱动轴从t4继续顺时针转动至剪线复位区W3内的t6，t6转角同时为抬压脚区内的一个转角值；该过程中，剪线驱动件81与剪线滚子83之间无动力传递，剪线驱动件81与剪线复位突部822之间有动力传递，驱动剪线机构中的各部件复位，动刀111回刀。上述过程中驱动电机60转过t5转角后，驱动电机60通过抬压脚传动机构驱动抬压脚机构动作，压脚40会略微上抬一个高度。
四、剪线后抬压脚时，剪线结束且剪线机构复位后，驱动电机60的驱动轴从t6继续顺时针转动至剪线后抬压脚区W4内的t7，此过程中，驱动电机60通过抬压脚传动机构驱动抬压脚机构持续动作，完成自动抬压脚。但是，调牙传动机构中，轴位螺钉75和避让槽721之间相对滑移，调牙曲柄73始终保持与固定座76上的缓冲垫77抵接配合的位置状态，送料牙30的抬牙高度始终为零；剪线传动机构中，剪线驱动件81的剪线凸轮面811上的等径段与剪线滚子83抵接配合、或者剪线驱动件81与剪线滚子83分离不接触，剪线机构不动作。
五、独立抬压脚时，电控模块控制驱动电机60的驱动轴从调牙区W1内的当前转角值逆时针转动至单独抬压脚区W5的t10，上述过程中，驱动电机60的驱动轴先后转过0、t9和t8转角后、再转动至t10转角。具体说，首先，驱动电机60的驱动轴从调牙区W1内的当前转角值逆时针转动至0，此过程中，送料牙30的抬牙高度逐渐增加至1.2mm。其次，驱动电机60的驱动轴继续逆时针转动至t9，送料牙30的抬牙高度逐渐减小至零；即：驱动电机60在t9转角处，调牙曲柄73刚好与固定座76上的缓冲垫77抵接配合，送料牙30的抬牙高度为零。再后，驱动电机60的驱动轴继续逆时针先后转动至t8和t10，从t8转角开始，驱动电机60通过抬压脚传动机构驱动抬压脚机构持续动作，完成自动抬压脚；但是，从t9逆时针转动至t10的过程中，调牙传动机构中，轴位螺钉75和 避让槽721之间相对滑移，调牙曲柄73始终保持与固定座76上的缓冲垫77抵接配合的位置状态，送料牙30的抬牙高度始终为零。另外，独立抬压脚的整个过程中，即从调牙区W1内的当前转角值逆时针转动至t10的过程中，剪线传动机构中，剪线驱动件81的剪线凸轮面811上的等径段与剪线滚子83抵接配合、或者剪线驱动件81与剪线滚子83分离不接触，剪线机构不动作。
综上所述，本发明有效克服了现有技术中的种种缺点而具高度产业利用价值。
上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，举凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。
Claims (13)
- 一种缝纫机传动结构，其特征是，包括调牙传动机构、剪线传动机构、抬压脚传动机构、驱动轴，调牙传动机构、剪线传动机构、抬压脚传动机构均由驱动轴提供动力；当驱动轴驱动剪线传动机构动作时以及驱动轴驱动抬压脚传动机构动作时，驱动轴与调牙传动机构之间的传动失效；调牙传动机构包括调牙曲柄、调牙轴、调牙连杆、调牙拉簧，调牙曲柄固定于调牙轴，调牙轴连接抬牙摆动座，调牙连杆一端与调牙曲柄铰接，调牙连杆另一端设有避让槽，驱动轴上安装调牙驱动件，调牙驱动件与避让槽滑动连接，调牙拉簧连接在调牙曲柄和缝纫机之间，调牙驱动件抵接到避让槽端部带动调牙传动机构动作。
- 根据权利要求1所述的缝纫机传动结构，其特征是，驱动轴上安装剪线驱动件、抬压脚驱动件；剪线驱动件上设有剪线凸轮面，剪线凸轮面抵接到剪线传动机构上带动剪线传动机构动作；抬压脚驱动件上设有抬压脚凸轮面，抬压脚凸轮面抵接到抬压脚传动机构上带动抬压脚传动机构动作。
- 根据权利要求1所述的缝纫机传动结构，其特征是，调牙连杆的避让槽中穿设轴位螺钉，调牙驱动件与调牙连杆通过轴位螺钉铰接。
- 根据权利要求2所述的缝纫机传动结构，其特征是，剪线传动机构包括剪线轴、剪线组件，剪线轴的一端与剪线驱动件传动配合、并由剪线驱动件驱动转动，剪线轴的另一端连接剪线机构。
- 根据权利要求4所述的缝纫机传动结构，其特征是，剪线轴的一端一体地设有剪线曲柄臂部，剪线曲柄臂部上安装有可转动地剪线滚子，剪线滚子与剪线凸轮面抵接配合。
- 根据权利要求5所述的缝纫机传动结构，其特征是，剪线曲柄臂部上固设有剪线复位突部，剪线复位突部与剪线滚子错位设置，剪线复位突部与剪线凸轮面抵接配合。
- 根据权利要求4所述的缝纫机传动结构，其特征是，剪线机构包括固定在剪线轴另一端的剪线曲柄、剪线连杆、动刀架、以及固定于缝纫机上的定刀，剪线连杆的两端分别与剪线曲柄和动刀架铰接，动刀固定在动刀架上。
- 根据权利要求2至7任意一项所述的缝纫机传动结构，其特征是，抬压脚传动机构包括抬压脚轴、抬压脚曲柄、以及抬压脚顶杆，抬压脚轴的一端与抬 压脚驱动件传动配合、并由抬压脚驱动件驱动转动，抬压脚轴的另一端与抬压脚曲柄的一端相固定，抬压脚曲柄的另一端与抬压脚顶杆的一端铰接，抬压脚顶杆的另一端连接抬压脚机构。
- 根据权利要求8所述的缝纫机传动结构，其特征是，抬压脚轴的一端一体地设有抬压脚曲柄臂部，抬压脚曲柄臂部上安装有可转动地抬压脚滚子，抬压脚驱动件的外周面设有抬压脚凸轮面，抬压脚滚子与抬压脚凸轮面抵接配合。
- 根据权利要求8所述的缝纫机传动结构，其特征是，抬压脚机构包括右杠杆、抬压脚拉杆、左杠杆、抬压脚提升板、压杆导架、以及上下延伸的压杆，抬压脚顶杆与右杠杆的一端铰接，右杠杆的另一端与抬压脚拉杆的一端铰接，抬压脚拉杆的另一端与左杠杆的一端铰接，左杠杆的另一端与抬压脚提升板的上端相铰接，抬压脚提升板上设有提升钩部，压杆导架上设有与提升钩部相卡合的连接突部，压杆导架固定在压杆的上端，压脚安装在压杆的下端。
- 根据权利要求1所述的缝纫机传动结构，其特征是，调牙传动机构还包括固定于缝纫机的固定座、固定在固定座上的缓冲垫，当所述调牙曲柄与缓冲垫抵接配合时，所述送料牙的抬牙高度不大于零。
- 根据权利要求2至8任意一项所述的缝纫机传动结构，其特征是，调牙驱动件和抬压脚驱动件合为一个整体件。
- 一种缝纫机传动方法，其特征是，用于实现权利要求1至12任意一项所述的缝纫机传动结构的动作，在360度范围内驱动轴具有下述几个功能区：调牙区W1，0～t1；剪线区W2，t2～t4；剪线复位区W3，t4～t6；剪线后抬压脚区W4，t5～t7；单独抬压脚区W5，t8～t10；t7和t10为驱动电机的同一个转角；a、缝纫机正常缝纫时，驱动轴保持在调牙区W1内的一个值，驱动轴不动作，缝纫机保持在有效的抬牙高度位置；b、调节抬牙高度时，驱动轴从调牙区W1内的当前转角值转动至调牙区W1内的另一转角值，通过调牙传动机构调节抬牙高度；调节结束后，驱动轴保持在该转角值，保持调节后的抬牙高度；当驱动轴在调牙区W1内转动时，剪线传动机构不动作，抬压脚传动机构不动作；c、自动剪线时，驱动轴从调牙区W1内的当前转角值转动至剪线区W2内的 t4，上述过程中，驱动轴先后转过t1、t2和t3转角后、再转动至t4转角，t3转角为剪线区W2内的一个转角值；首先，从调牙区W1内的当前转角值转动至t1，抬牙高度逐渐减小；其次，驱动轴继续转动至t2，抬牙高度继续减小；再后，驱动轴继续转动至t3，抬牙高度逐渐减小至零；最后，驱动轴继续转动至t4，剪线传动机构动作，抬牙高度始终为零；上述驱动轴从调牙区W1内的当前转角值转动至剪线区W2内的t4的整个过程中，抬压脚传动机构不动作；剪线结束后，驱动轴从t4继续转动至剪线复位区W3内的t6，t6转角同时为抬压脚区内的一个转角值；该过程中，剪线传动机构中的各部件复位；上述过程中驱动轴转过t5转角后，抬压脚传动机构动作，略微上抬一个抬压脚高度；d、剪线后抬压脚时，剪线结束且剪线传动机构复位后，驱动轴从t6继续转动至剪线后抬压脚区W4内的t7，此过程中，抬压脚传动机构持续动作，完成自动抬压脚，抬牙高度始终为零，剪线传动机构不动作；e、独立抬压脚时，驱动轴从调牙区W1内的当前转角值反向转动至单独抬压脚区W5的t10，上述过程中，驱动轴先后转过0、t9和t8转角后、再转动至t10转角；首先，驱动轴转动至0，抬牙高度逐渐增加；其次，驱动轴转动至t9，送抬牙高度逐渐减小至零；再后，驱动轴先后转动至t8和t10，从t8转角开始，抬压脚传动机构持续动作，完成自动抬压脚；从t9反向转动至t10的过程中，抬牙高度始终为零；独立抬压脚的整个过程中，剪线传动机构不动作。
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|---|---|---|---|---|
| WO2024098458A1 (zh) * | 2022-11-11 | 2024-05-16 | 浙江美机缝纫机有限公司 | 一种缝纫机上的抬压脚、调针距机构及缝纫机 |
| CN118668388A (zh) * | 2024-08-22 | 2024-09-20 | 浙江翔科缝纫机股份有限公司 | 一种缝纫机的调牙、抬压脚、剪线及调针距驱动机构 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH119867A (ja) * | 1997-06-26 | 1999-01-19 | Brother Ind Ltd | ミシンの送り歯高さ位置調節装置 |
| CN1270246A (zh) * | 1999-02-08 | 2000-10-18 | 重机株式会社 | 送料牙高度调节机构 |
| CN106637706A (zh) * | 2015-10-30 | 2017-05-10 | 蛇目缝衣机工业株式会社 | 送布牙调节装置及具备该调节装置的缝纫机 |
| CN111197203A (zh) * | 2020-03-19 | 2020-05-26 | 杰克缝纫机股份有限公司 | 一种抬牙剪线组件和具有该抬牙剪线组件的缝纫机 |
| CN111748919A (zh) * | 2019-03-29 | 2020-10-09 | 杰克缝纫机股份有限公司 | 平缝机的牙架高度调节机构 |
| CN212388175U (zh) * | 2020-05-20 | 2021-01-22 | 杰克缝纫机股份有限公司 | 一种缝纫机 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112626730B (zh) * | 2019-09-24 | 2021-12-28 | 杰克缝纫机股份有限公司 | 一种缝纫机 |
| CN112626729A (zh) * | 2019-09-24 | 2021-04-09 | 杰克缝纫机股份有限公司 | 一种抬牙高度智能调节机构及缝纫机 |
| CN110983642B (zh) * | 2019-12-16 | 2021-09-28 | 杰克缝纫机股份有限公司 | 送布牙下供机构及缝纫机 |
| CN110923967B (zh) * | 2019-12-23 | 2021-12-14 | 浙江杰克智能缝制科技有限公司 | 缝纫机剪线松线抬压脚装置及缝纫机 |
| CN113564817B (zh) * | 2020-04-28 | 2022-07-22 | 杰克科技股份有限公司 | 一种缝纫机 |
| CN212247421U (zh) * | 2020-05-08 | 2020-12-29 | 浙江广和缝纫机有限公司 | 一种缝纫机的剪线抬压脚装置 |
-
2021
- 2021-04-09 CN CN202110384598.9A patent/CN115198454B/zh active Active
- 2021-12-07 WO PCT/CN2021/135905 patent/WO2022213638A1/zh active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH119867A (ja) * | 1997-06-26 | 1999-01-19 | Brother Ind Ltd | ミシンの送り歯高さ位置調節装置 |
| CN1270246A (zh) * | 1999-02-08 | 2000-10-18 | 重机株式会社 | 送料牙高度调节机构 |
| CN106637706A (zh) * | 2015-10-30 | 2017-05-10 | 蛇目缝衣机工业株式会社 | 送布牙调节装置及具备该调节装置的缝纫机 |
| CN111748919A (zh) * | 2019-03-29 | 2020-10-09 | 杰克缝纫机股份有限公司 | 平缝机的牙架高度调节机构 |
| CN111197203A (zh) * | 2020-03-19 | 2020-05-26 | 杰克缝纫机股份有限公司 | 一种抬牙剪线组件和具有该抬牙剪线组件的缝纫机 |
| CN212388175U (zh) * | 2020-05-20 | 2021-01-22 | 杰克缝纫机股份有限公司 | 一种缝纫机 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024098458A1 (zh) * | 2022-11-11 | 2024-05-16 | 浙江美机缝纫机有限公司 | 一种缝纫机上的抬压脚、调针距机构及缝纫机 |
| CN118668388A (zh) * | 2024-08-22 | 2024-09-20 | 浙江翔科缝纫机股份有限公司 | 一种缝纫机的调牙、抬压脚、剪线及调针距驱动机构 |
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