WO2022160890A1 - 一种具有零点位置的缝纫机 - Google Patents
一种具有零点位置的缝纫机 Download PDFInfo
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- WO2022160890A1 WO2022160890A1 PCT/CN2021/132054 CN2021132054W WO2022160890A1 WO 2022160890 A1 WO2022160890 A1 WO 2022160890A1 CN 2021132054 W CN2021132054 W CN 2021132054W WO 2022160890 A1 WO2022160890 A1 WO 2022160890A1
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- zero
- sewing machine
- presser foot
- cam
- positioning
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- 238000009958 sewing Methods 0.000 title claims abstract description 72
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 238000009966 trimming Methods 0.000 claims description 60
- 230000009471 action Effects 0.000 claims description 53
- 230000005540 biological transmission Effects 0.000 claims description 41
- 239000004744 fabric Substances 0.000 claims description 18
- 230000008859 change Effects 0.000 claims description 4
- 239000012636 effector Substances 0.000 claims 3
- 238000005520 cutting process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000003578 releasing effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009021 linear effect Effects 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 230000009466 transformation 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
- D05B27/22—Work-feeding means with means for setting length of stitch
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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
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
Definitions
- the present application proposes a sewing machine with a zero position, and specifically relates to the technical field of sewing machine manufacturing.
- the sewing machine has a stitch length adjustment mechanism, which is used to adjust the stitch length of the sewing machine.
- the stitch length adjustment mechanism can switch between the forward sewing mode and the reverse sewing mode.
- the center point between the forward sewing mode and the reverse sewing mode is zero.
- the zero position is the zero position state of the swing seat of the sewing machine.
- the old-fashioned sewing machine is adjusted by rotating the needle distance adjustment lever in the needle distance adjustment mechanism.
- the needle distance adjustment stud When the needle distance adjustment stud is rotated, it will move forward or right. Its fulcrum is rotated to adjust the actual distance between the positive needle and the negative needle distance of the swing seat, so that the swing angle of the swing seat can be changed and the corresponding needle distance adjustment can be realized.
- the needle of the sewing machine stays under the needle plate, which is called the lower needle position, and the needle stays above the needle plate, which is called the upper needle position.
- the stop position of the sewing machine is determined by the end of the sewing stitch. The stop position of the needle will have a certain impact on the subsequent sewing work. If it stays at the lower needle position, turn the handwheel to raise the needle to solve the problem; if it stays at the upper needle position, reverse the handwheel to lower the feed dog. under the needle plate.
- the pushing device for pushing the feeding dog since an additional driving device needs to be added, the manufacturing cost of the sewing machine is naturally increased.
- the pushing device For installing the pushing device on the bottom of the sewing machine base, it is inconvenient to install the pushing device on the feed shaft or other related components in the production and assembly process, and the pushing device occupies a large space and makes the base cluttered.
- the disadvantage of this push device is that no matter the feed dog is below or above the needle plate, the push device has to implement a preset push plan, and its intelligence level is relatively low, and it also has the disadvantage of wasting energy.
- the present application provides a sewing machine with a zero position, which can realize accurate zero position control.
- a sewing machine with a zero position includes a drive motor, a cam and a stitch length adjustment mechanism, the stitch length adjustment mechanism includes a rotating combined wheel and a swing seat, the rotating combined wheel is connected with the swing seat, and the cam is connected to the output shaft of the drive motor.
- a coaxial connection the cam is provided with a zero point locating rod, the rotating combination wheel is provided with a positioning chute adapted to the zero point locating rod, the positioning chute is an arc groove, and the radius of the center line of the positioning chute is the same as the zero point.
- the rotation radius of the axis of the positioning rod around the output shaft is the same.
- the rotation of the zero-point positioning rod will not drive the rotation combination.
- the rotating combination wheel and the drive shaft sleeve are relatively static, forming a fixed positioning position, and the above position is the zero position of the feeding dog.
- a bell mouth 1 and a bell mouth 2 are provided on the rotating combined wheel, and the bell mouth 1 and the bell mouth 2 are respectively arranged at both ends of the positioning chute and communicate with the positioning chute.
- the bell mouth 1 and the bell mouth 2 facilitate the entry of the zero point locating rod into the positioning chute, and the positioning function of the zero point locating rod is the same whether it enters the positioning chute from the bell mouth 1 or the bell mouth 2.
- the needle distance adjustment mechanism further comprises a cloth feed shaft, a transmission shaft sleeve, a transmission connection and a connecting block, the rotating combination wheel is fixed with the transmission shaft sleeve, the transmission shaft sleeve is rotatably connected with the cloth feeding shaft, and the connecting block is connected with the transmission shaft.
- the shaft sleeve is fixed, the swing seat is hinged with the transmission link, and the transmission link is fixed on the connecting block; the cam is provided with a working surface for adjusting the needle distance, and the rotating combination wheel is provided with a working surface for adjusting the needle distance. Needle distance adjustment action surface.
- the needle distance adjustment mechanism of the needle distance adjustment mechanism is driven by the operation of the drive motor.
- the needle distance adjustment working surface of the cam matches the needle distance adjustment function surface of the rotating combined wheel.
- the cam changes with the needle distance under the operation of the drive motor.
- the action position between the distance adjustment surfaces, the rotation of the rotating combination wheel makes the needle distance adjustment surface, the entire rotating combination wheel and the transmission bushing rotate together at a certain angle, the rotating transmission bushing drives the connected connecting block, and finally makes the transmission
- the connecting rod changes the swing of the swing seat, realizes the indirect adjustment of the swing seat by the cam, and realizes the adjustment of the stitch length of the sewing machine.
- the connecting block is provided with several fixing holes, and the transmission link is fixed with one of the fixing holes.
- the connection block and the transmission link can be fixed by selecting different fixing holes according to the requirements of different needle distances, which can realize the purpose of adjusting the needle distance.
- the cam is coaxially connected to the output shaft through a shaft hole, the shaft hole is located between the stitch adjustment working surface and the zero point locating rod, and the shaft hole, the stitch length adjusting working surface and the zero point locating rod are on the same straight line.
- the structure can realize the purpose of zero point positioning and spacing adjustment respectively according to different angular positions of the cam.
- the opening directions of the positioning chute and the stitch length adjusting surface are the same.
- the structure is convenient for the distance adjustment working surface and the zero-point locating rod to be clamped into the corresponding grooves.
- the positioning chute and the stitch length adjusting surface are in different planes.
- the structure can avoid interference.
- a presser foot lifter mechanism is also included, the presser foot lifter mechanism includes a presser foot ejector rod, a link mechanism and a presser foot lifter end execution assembly, and the presser foot ejector and the presser foot lifter end execution assembly are connected by a link mechanism,
- the cam has a presser foot working surface and a circular surface, and the presser foot ejector rod is in contact with the presser foot working surface or the circular surface. The mechanism is transmitted to the presser foot lifter end actuator to perform the presser foot lifter action.
- the presser foot working surface of the cam produces a lifting force on the presser foot ejector rod with the change of the cam arc, and then the presser foot lifter end actuator performs the presser foot lifting action, so that the zero-point positioning rod can lift the presser foot inside the positioning chute. action.
- the thread trimming mechanism includes a thread trimming fork wheel, a thread trimming crank and a thread trimming end execution assembly
- the thread trimming crank includes a thread trimming moving rod
- the thread trimming fork wheel includes a thread trimming action surface
- the wire-cutting moving rod is arranged between the wire-cutting action surface and the idling surface
- the wire-cutting crank is connected with the output shaft 2 of the driving motor.
- the drive motor is a dual-head power output drive motor, and the two output shafts of the drive motor are the first output shaft and the second output shaft.
- the structure can control three different actions by a single driving member, and strictly control the sequence of successive actions through the mechanical structure.
- the beneficial effect of the present application is that the cam is driven by the driving motor, and the cam then drives and rotates the combined wheel, so that the stitch adjustment working surface and the stitch adjustment action surface on it perform the stitch adjustment action;
- the stitch length adjustment action surface performs the stitch length adjustment action.
- the driving motor drives the cam
- the movable zero-point positioning rod will always form a fixed positioning position for the transmission shaft sleeve to the static positioning chute, so as to realize the positioning of the lower needle position of the feeding dog.
- the positioning chute idly rotates to perform other sewing actions.
- a sewing machine with a zero position of the present application not only realizes a driving motor to flexibly control the actions of stitch pitch adjustment, thread trimming and presser foot lifting, but also under the control of the electric control system of the sewing machine. It is realized that the feeding dog is at the zero position, the actual product is highly creative, and the sewing action is completed in one go, which has high promotion and use value.
- Fig. 1 is a kind of sewing machine structure schematic diagram with zero position of the present application
- FIG. 2 is a schematic diagram of the position of the feed dog and the feed shaft of a sewing machine with a zero position of the present application;
- FIG. 3 is an exploded view of a stitch length adjusting mechanism of a sewing machine with a zero position according to the present application
- Fig. 4 is an enlarged view of the feeding dog of a sewing machine with a zero position according to the present application
- FIG. 5 is another view of the stitch length adjusting mechanism of a sewing machine with a zero position of the present application
- FIG. 6 is a structural diagram of a sewing machine rotating combined wheel with a zero position of the present application.
- FIG. 7 is a structural diagram of a sewing machine zero-point positioning rod with a zero-point position according to the present application.
- FIG. 8 is a structural diagram of a sewing machine thread trimming mechanism with a zero position according to the present application.
- needle distance adjustment mechanism 10 rotating combination wheel 11, needle distance adjustment action surface 111, positioning chute 112, bell mouth 1 113, bell mouth 2 144, positioning surface 115, cloth feed shaft 12, cloth feed crank 121 , drive shaft sleeve 13, swing seat 14, short swing plate 141, long swing plate 142, transmission link 15, connecting block 16, feed link 17, presser foot lifter 20, presser foot ejector 21, lifter end Execution assembly 22, drive motor 50, output shaft 1 51, output shaft 2 52, cam 61, circular surface 62, stitch adjustment working surface 63, zero point positioning rod 64, shaft hole 65, presser foot working surface 66, feed dog 7.
- the present application is a sewing machine with a zero point position, which has a stitch length adjusting mechanism 10, a presser foot lifting mechanism 20, a thread trimmer mechanism 90, a driving motor 50 and an electronic control system.
- the adjusting mechanism 10 , the presser foot lifting mechanism 20 and the thread trimming mechanism 90 perform their respective sewing actions.
- the above-mentioned driving motor 50 is a double-headed power output driving motor.
- the driving motor 50 is connected with an output shaft 1 51 and an output shaft 2 52.
- the output shaft 1 51 is installed with a cam 61 to perform the stitch adjustment action and lifting pressure of the stitch adjustment mechanism 10.
- the foot mechanism 20 lifts the presser foot; the second output shaft 52 is equipped with a thread trimming crank 92 to perform the thread trimming action of the thread trimming mechanism 90 .
- the present application also has a thread release mechanism.
- the cam 61 installed on the first output shaft 51 performs one of the following actions for sewing: executing the thread release mechanism and the presser foot lifting mechanism 20; executing the thread loosening mechanism alone; and executing the presser foot lifting mechanism 20 alone.
- the shaft hole 65 of the cam 61 is used to fix the cam 61 on the output shaft 1 51 of the drive motor 50.
- the shaft hole 65 is located between the stitch adjustment working surface 63 and the zero point positioning rod 64, and the shaft hole 65,
- the needle distance adjustment working surface 63 and the zero point positioning rod 64 are located on the connecting line of the center lines of the three.
- the cam 61 rotates with the output shaft 1 51 of the drive motor 50 as the central axis, that is, the stitch adjustment working surface 63 and the zero point positioning rod 64 on the cam 61 also rotate with the shaft hole 65 as the center, and the above zero point positioning rod is adjacent to the positioning rod. noodle.
- the rotating combination wheel 11 rotates with the cloth feeding shaft 12 as the rotating shaft, and the positioning chute 112 and the stitch adjustment action surface 111 naturally also rotate with the cloth feeding shaft 12 as the rotating shaft.
- the line connecting the center of the adjusting action surface 111 is collinear with the center line of the feeding shaft 12 .
- the present application is a sewing machine that has the ability to determine the zero position of the feed dog 7.
- the first technical solution to be realized is to realize the adjustment of the stitch length when the sewing machine is stopped. Rotating the action position of the combined wheel 11 indirectly adjusts the swing of the swing seat 14, so as to realize the adjustment of the stitch length.
- the sewing machine after the adjustment of the stitch length can sew with a fixed stitch length; the second is that the electric control device of the sewing machine drives the motor through the 50 drives the output shaft 1 51 to drive the cam 61 to push and rotate the combined wheel 11, which indirectly makes the swing seat 14 in the zero position state.
- the zero position state of the swing seat 14 is usually reflected in the flush position of the short swing plate 141 and the long swing plate 142, and indirectly makes the feeding dog 7 in the zero position without front and rear feeding action.
- the above-mentioned stitch length adjusting mechanism 10 has a rotating combination wheel 11 , a cloth feeding shaft 12 , a transmission shaft sleeve 13 , a swing seat 14 , a transmission link 15 and a connecting block 16 .
- the rotating combination wheel 11 is fixedly connected with the transmission shaft sleeve 13, the transmission shaft sleeve 13 is sleeved on the cloth feeding shaft 12, and the transmission shaft sleeve 13 is sleeved on the cloth feeding shaft 12.
- there is a clearance fit relationship between the transmission shaft sleeve 13 and the cloth feed shaft 12 .
- the rotating combination wheel 11 and the transmission shaft sleeve 13 rotate at a certain angle with the feeding shaft 12 as the rotating shaft.
- the other end of the transmission shaft sleeve 13 is connected with a connection block 16
- the swing seat 14 is hinged with the transmission link 15
- the transmission link 15 is fixed on the connection block 16 .
- the connecting block 16 is provided with several fixing holes, and the connecting block 16 and the transmission connecting rod 15 adopt variable fixed connection.
- different fixing holes are selected between the connecting block 16 and the transmission connecting rod 15 according to the requirements of different needle distances. To fix it, it can also achieve the purpose of adjusting the needle distance.
- the rotating combination wheel 11 and the drive shaft sleeve 13 are manufactured as one piece, and the two are sleeved on the cloth feed shaft 12 as a whole; as another embodiment, the drive shaft sleeve 13 and the connecting block 16 are manufactured Become one-piece, making the structure more stable.
- the stitch adjustment mechanism 10 is driven by the operation of the drive motor 50 to implement the stitch adjustment action.
- the stitch adjustment working surface 63 of the cam 61 matches the stitch adjustment action surface 111 of the rotating combined wheel 11 , and the cam 61 is driving Under the operation of the motor 50, the action position between the motor 50 and the stitch adjustment action surface 111 is changed, and the rotation of the rotating combination wheel 11 makes the stitch distance adjustment action surface 111 and the entire rotating combination wheel 11 and the transmission shaft sleeve 13 rotate together by a certain angle, and the rotation
- the drive shaft sleeve 13 drives the connected connecting block 16, and finally the drive link 15 changes the swing of the swing seat 14, realizes the indirect adjustment of the swing seat 14 by the cam 61, and realizes the stitch length adjustment of the sewing machine.
- the above-mentioned cam 61 and the rotating combination wheel 11 have the function of determining the zero point position of the feeding dog 7 .
- the zero-point positioning rod 64 indirectly exerts an influence on the positioning and feeding dog 7 under the drive of the driving motor 50, so that it loses Front and rear feeding power.
- the zero point positioning rod 64 When the drive motor 50 drives the cam 61 to drive the zero point positioning rod 64 to rotate, the zero point positioning rod 64 first contacts the bell mouth 113, and continues to enter the positioning chute 112 from the bell mouth one 113, and the zero point positioning rod 64 pushes the bell mouth one 113 At the same time, it also pushes the entire rotating combination wheel 11 and the transmission sleeve 13 to rotate, the connecting block 16 and the transmission link 15 linked with the transmission sleeve 13 push the swing seat 14, and the short swing plate 141 and the long swing of the pushed swing seat 14 The positions of both plates 142 are flush.
- the movable zero-point positioning rod 64 When the cam 61 enters the zero-point positioning rod 64 of the positioning chute 112, the movable zero-point positioning rod 64 always forms a fixed positioning for the transmission sleeve 13 to the stationary positioning chute 112, and the above-mentioned zero-point positioning rod 64 is in the positioning chute. 112 internal operation, the feed dog 7 is at the zero position of the feed dog 7.
- the swing seat 14 at this time will still receive the swing source of the feed link 17 under the operation of the spindle motor, the swing seat 14 is pushed by the transmission link 15 to reach the cloth feed shaft 12 through the cloth feed crank 121 and is in a static state, so that the The feed dog bracket 71 fixed on the feed shaft 12 stops twisting, and the feed dog 7 on the cloth feed dog bracket 71 loses the power to feed the cloth forward and backward, thereby determining the zero position of the feed dog 7.
- the contact action point of the above-mentioned zero-point positioning rod 64 to the bell mouth 113 is the work determination point for determining the zero-point position of the feed dog 7. After confirming that the zero-point position of the feed dog 7 is under the needle plate 8, the drive motor 50 can be executed immediately.
- the actions of thread trimming and presser foot lift achieve the technical effect of thread trimming at the zero position of the present application.
- the inlets at both ends of the positioning chute 112 are bell mouth 1 113 and bell mouth 2 144.
- the zero-point positioning rod 64 can slide freely inside the positioning chute 112, that is, freely slide between the bell mouth 1 113 and the bell mouth 2 144, and the zero point The positioning rod 64 operates between the bell mouth 113 and the bell mouth 2 144 of the positioning chute 112.
- the positioning function of the zero point positioning rod 64 is the same whether it enters the positioning chute 112 from the bell mouth 113 or the bell mouth 2 144. of.
- the driving motor 50 After positioning the sewing machine at the zero position, the driving motor 50 performs the lifting action of the presser foot lifting mechanism 20 and the thread trimming action performed by the thread trimming mechanism 90.
- the sewing machine can also perform the thread releasing action of the thread releasing mechanism.
- the zero-point positioning rod 64 locates the chute 112
- the next sewing action or steps to be performed by the driving motor 50 is not limited, and can be actually implemented according to the sewing process or the structure of the sewing machine.
- the thread trimming action specifically includes: a thread trimming mechanism 90 is installed on the output shaft two 52 of the driving motor 50, and the thread trimming mechanism 90 specifically includes a thread trimming fork wheel 91, a thread trimming crank 92, a connecting rod mechanism and a thread trimming end execution assembly 93, The presser foot ejector and the presser foot lifter end actuator are connected by a link mechanism.
- the thread trimmer crank 92 has a thread trimmer moving rod 921, and the thread trimmer moving rod 921 is located on the thread trimming action surface 911 and the idle surface 912 of the thread trimming fork wheel 91. between.
- the driving motor 50 drives the thread trimming rod 921 of the thread trimming crank 92 to push the thread trimming action surface 911 of the thread trimming fork wheel 91, thereby rotating
- the thread trimming fork wheel 91 realizes that the thread trimming end execution assembly 93 performs thread trimming.
- the presser foot lifting mechanism 20 includes: a presser foot ejector rod 21 and a presser foot lifter end execution assembly 22 .
- the above-mentioned thread trimming action is almost simultaneously performed with the presser foot lifting action.
- the presser foot lifting action includes: the cam 61 has a presser foot working surface 66 and a round surface 62 .
- the presser foot working surface 66 of the cam 61 generates a lifting force on the presser foot ejector rod 21 with the change of the cam 61 radian, and then the presser foot lifter end execution assembly 22 performs the presser foot lifting action, so as to realize the zero-point positioning rod 64 in the positioning slide.
- the inside of the groove 112 realizes the action of lifting the presser foot.
- the contact action point of the zero point positioning rod 64 on the second bell mouth 144 is the work determination point for determining the zero point position of the feed dog 7, and enters the positioning chute 112.
- the thread cutting rod 921 does not cut
- the linear action surface 911 generates thrust, and only contacts the idling surface 912 for idling.
- the presser foot working surface 66 of the cam 61 gradually generates a lifting force on the presser foot ejector bar 21, so that the presser foot is successfully lifted, which is convenient for the sewing stitch to change direction.
- the rod 64 is retracted from the flare two 144 to the original zero position.
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Abstract
本发明公开了一种具有零点位置的缝纫机，包括驱动电机、凸轮和针距调节机构，针距调节机构包括转动组合轮和摆动座，所述转动组合轮与摆动座连接，所述凸轮与驱动电机的输出轴一同轴连接，所述凸轮上设有零点定位杆，转动组合轮上设有与零点定位杆适配的定位滑槽，定位滑槽为圆弧槽，定位滑槽的中心线的半径与零点定位杆的轴线绕输出轴一转动的转动半径相同。本发明提供了一种具有零点位置的缝纫机，可以实现准确的零点位置控制。
Description
本申请提出一种具有零点位置的缝纫机，具体涉及缝纫机制造技术领域。
缝纫机具有针距调节机构，针距调节机构用于调节缝纫机的针距，针距调节机构具有切换正缝模式和倒缝模式，正缝模式和倒缝模式之间的中心点位为零位，零位即为缝纫机摆动座的零位状态。在调节针距时，通常是缝纫机停机状态下进行的。老式的缝纫机是通过转动针距调节机构中的针距调节杆进行调节，针距调节螺柱被转动的同时会前移或右移，通过针距调节机构驱动送料机构中摆动座的零位绕其支点转动，以调节摆动座的正针距负针距的实际距离，得以改变摆动座的摆幅角度，实现相应的针距调节。
当缝纫机的针距为零针距时，缝纫机机针停留在针板之下称之为下针位，机针停留在针板之上称之为上针位。脚踏式缝纫机在缝制结束时，缝纫机的停留位置是由缝制线迹的结束而确定停留位置的。机针的停留位置对后续的缝制工作造成一定的影响，如果停留在下针位就转动手轮使机针上抬即可解决问题；如果停留在上针位则倒转手轮将送布牙下降到针板之下。在上述送布牙停留的位置高出针板状态下，缝制布料在压脚下取出时、以及在下个缝制工作中将布料推到压脚之下时，都有可能出现送布牙勾住布料，导致布料被勾坏的情况发生。
上述对送布牙实施推动的推动装置方案中，由于需要增加一个额外的驱动装置，这就自然增加了缝纫机的制造成本。对于在缝纫机基座底部加装这个推动装置，无论对送布轴还是其它相关部件上加装这个推动装置在生产装配过程显得较为不便，推动装置占用空间较大使得基座杂乱。另外，这个推动装置存在的缺点是不管送布牙处在低于还是高于针板，推动装置都要实施预设的推动计划，其智能化水平相对不高，同时存在浪费能源的缺点。
发明内容
针对现有缝纫机的送布牙技术存在停留位置的技术问题，本申请提供一种具有零点位置的缝纫机，可以实现准确的零点位置控制。
一种具有零点位置的缝纫机，包括驱动电机、凸轮和针距调节机构，针距调节机构包括转动组合轮和摆动座，所述转动组合轮与摆动座连接，所述凸轮与驱动电机的输出轴一同轴连接，所述凸轮上设有零点定位杆，转动组合轮上设有与零点定位杆适配的定位滑槽，定位滑槽为圆弧槽，定位滑槽的中心线的半径与零点定位杆的轴线绕输出轴一转动的转动半径相同。
上述技术方案中，当零点定位杆进入到定位滑槽后，由于定位滑槽的中心线的半径与零点定位杆的轴线绕输出轴一转动的转动半径相同，零点定位杆转动不会带动转动组合轮转动，转动组合轮和传动轴套相对静止，形成一个固定的定位位置，上述位置即为送布牙的零点位置。
作为优选，所述转动组合轮上设有喇叭口一和喇叭口二，喇叭口一和喇叭口二分别设置在定位滑槽的两端且与定位滑槽连通。所述喇叭口一和喇叭口二方便零点定位杆进入定位滑槽，零点定位杆无论是从喇叭口一还是喇叭口二进入定位滑槽起到的定位作用是相同的。
作为优选，所述针距调节机构还包括送布轴、传动轴套、传动连和连接块，所述转动组合轮与传动轴套固定，传动轴套与送布轴转动连接，连接块与传动轴套固定，摆动座与传动连杆铰链，传动连杆固定在连接块上；所述凸轮上设有针距调节工作面，所述转动组合轮上设有与针距调节工作面适配的针距调节作用面。针距调节机构实施针距调节动作是在驱动电机的运转下驱动的，凸轮具有的针距调节工作面与转动组合轮具有的针距调节作用面匹配，凸轮在驱动电机的运转下改变与针距调节作用面之间的作用位置，转动组合轮的转动使针距调节作用面及整个转动组合轮和传动轴套一起转动一定的角度，旋转的传动轴套带动连接的连接块，最终使得传动连杆改变了摆动座的摆幅，实现凸轮间接对摆动座的调整，实现了缝纫机的针距调整。
作为优选，所述连接块上设置有数个固定孔，传动连杆与其中一个固定孔固定。连接块和传动连杆两者之间根据不同针距的要求选择不同的固定孔来固定，可以实现调节针距的目的。
作为优选，所述凸轮通过轴孔与输出轴一同轴连接，轴孔位于针距调节工作面与零点定位杆之间，轴孔、针距调节工作面和零点定位杆处于同一直线上。所述结构可以实现根据凸轮的不同角度位置分别实现零点定位和间距调整的目的。
作为优选，所述定位滑槽和针距调节作用面的开口方向相同。所述结构方便距调节工作面和零点定位杆卡入对应的槽中。
作为优选，所述定位滑槽和针距调节作用面处于不同的平面内。所述结构可以避免干涉。
作为优选，还包括抬压脚机构，所述抬压脚机构包括压脚顶杆、连杆机构和抬压脚末端执行组件，压脚顶杆和抬压脚末端执行组件通过连杆机构连接，所述凸轮具有压脚工作面和圆面，压脚顶杆与压脚工作面或圆面接触，压脚工作面随着凸轮弧度的改变而对压脚顶杆产生抬升力，再由连杆机构传递到抬压脚末端执行组件执行抬压脚动作。凸轮的压脚工作面 随着凸轮弧度的改变而对压脚顶杆产生抬升力，再由抬压脚末端执行组件执行抬压脚动作，从而实现零点定位杆在定位滑槽内部实现抬压脚动作。
作为优选，还包括有剪线机构，所述剪线机构包括有剪线叉轮、剪线曲柄和剪线末端执行组件，剪线曲柄包括剪线动杆，剪线叉轮包括剪线作用面与空转面，所述剪线动杆设置在位于剪线作用面与空转面之间，剪线曲柄与驱动电机的输出轴二连接。当零点定位杆开始进入定位滑槽时，立即开始上述的剪线动作，驱动电机驱动剪线曲柄的剪线动杆推动剪线叉轮的剪线作用面，从而转动剪线叉轮，实现剪线末端执行组件执行剪线。
作为优选，所述驱动电机为双头动力输出驱动电机，所述驱动电机的两个输出轴分贝为输出轴一和输出轴二。所述结构可以由一个单一驱动件控制三个不同的动作，且通过机械结构严格控制先后动作的时序。
本申请的有益效果是通过驱动电机驱动凸轮，凸轮再带动转动组合轮，使得其上的针距调节工作面与针距调节作用面执行针距调节动作；使得其上的针距调节工作面与针距调节作用面执行针距调节动作。当驱动电机驱动凸轮后，使得活动的零点定位杆对静止的定位滑槽始终对传动轴套形成一个固定的定位位置，从而实现送布牙的下针位的定位，驱动电机乘机零点定位杆在定位滑槽空转来执行其它的缝纫动作，本申请的一种具有零点位置的缝纫机不仅实现了一个驱动电机灵活控制针距调节、剪线和抬压脚动作，在本缝纫机的电控系统控制下实现了送布牙处于零点位置，实际产品创造性强，缝纫动作一气呵成，具有较高的推广使用价值。
图1是本申请的一种具有零点位置的缝纫机结构示意图；
图2是本申请的一种具有零点位置的缝纫机的送布牙位置和送布轴示意图；
图3是本申请的一种具有零点位置的缝纫机的针距调节机构爆炸图；
图4是本申请的一种具有零点位置的缝纫机的送布牙放大图；
图5是本申请的一种具有零点位置的缝纫机的针距调节机构另一视图；
图6是本申请的一种具有零点位置的缝纫机转动组合轮结构图；
图7是本申请的一种具有零点位置的缝纫机零点定位杆结构图；
图8是本申请的一种具有零点位置的缝纫机剪线机构结构图。
附图标记：针距调节机构10，转动组合轮11，针距调节作用面111，定位滑槽112，喇叭口一113，喇叭口二144，定位面115，送布轴12，送布曲柄121，传动轴套13，摆动座14，短摆动板141，长摆动板142，传动连杆15，连接块16，送料连杆17，抬压脚机构20， 压脚顶杆21，抬压脚末端执行组件22，驱动电机50，输出轴一51，输出轴二52，凸轮61，圆面62，针距调节工作面63，零点定位杆64，轴孔65，压脚工作面66，送布牙7，送布牙支架71，针板8，剪线机构90，剪线叉轮91，剪线作用面911，空转面912，剪线曲柄92，剪线动杆921，剪线末端执行组件93。
下面结合图1-7对本申请的优选实施例进行详细阐述，以使本申请的优点和特征能更易于被本领域技术人员理解，从而对本申请的保护范围做出更为清楚明确的界定,这些实施方式仅用于说明本发明，而并非对本发明的限制。
本申请为一种具有零点位置的缝纫机，具有针距调节机构10、抬压脚机构20、剪线机构90、驱动电机50及电控系统，上述驱动电机50采取在不同时间段分别驱动针距调节机构10、抬压脚机构20以及剪线机构90来执行各自的缝纫动作。上述驱动电机50为双头动力输出驱动电机，驱动电机50接出有输出轴一51和输出轴二52，输出轴一51安装有凸轮61执行针距调节机构10的针距调节动作和抬压脚机构20的抬压脚动作；输出轴二52安装有剪线曲柄92执行剪线机构90的剪线动作。
作为另外方案，本申请还具有松线机构。上述输出轴一51安装的凸轮61执行缝纫动作方案具有下列其中的一种：执行松线机构和抬压脚机构20；单独执行松线机构；单独执行抬压脚机构20。
上述凸轮61具有的轴孔65用于将凸轮61固定在驱动电机50的输出轴一51上，上述轴孔65的位于针距调节工作面63与零点定位杆64之间，且轴孔65、针距调节工作面63和零点定位杆64位于三者中心线的连线上。凸轮61以驱动电机50的输出轴一51为中心轴转动，即凸轮61其上的针距调节工作面63和零点定位杆64也以轴孔65为中心旋转，上述零点定位杆相邻有定位面。
在凸轮61的作用下转动组合轮11以送布轴12为转动轴转动，定位滑槽112和针距调节作用面111自然也以送布轴12为转动轴转动，上述定位滑槽112和针距调节作用面111的中心连线与送布轴12的中心线共线。
本申请是具有确定送布牙7零点位置的缝纫机，所要实现的技术方案一是在缝纫机停机状态下实现针距调节，缝纫机的电控装置通过驱动电机50驱动输出轴一51带动凸轮61调整与转动组合轮11作用位置，间接起到对摆动座14的摆幅调整，从而实现针距调节，针距调节完成的缝纫机以固定的针距进行缝制；二是缝纫机的电控装置通过驱动电机50驱动输出轴一51带动凸轮61推动转动组合轮11，间接使得摆动座14处于零位状态。摆动座14处于 零位状态通常体现在短摆动板141和长摆动板142位置齐平位置上，并且间接使得送布牙7处于无前后送布动作的零点位置。
上述针距调节机构10具有转动组合轮11、送布轴12、传动轴套13、摆动座14、传动连杆15和连接块16。转动组合轮11与传动轴套13固定连接，传动轴套13套设在送布轴12上，传动轴套13套设在送布轴12有定位装置铺助使得传动轴套13零点位置稳定可靠，并且传动轴套13与送布轴12两者之间有间隙配合关系。转动组合轮11和传动轴套13以送布轴12为转动轴以一定角度转动。传动轴套13另一端连接有连接块16，摆动座14与传动连杆15铰链，传动连杆15固定在连接块16上。连接块16上设置有数个固定孔，连接块16与传动连杆15采用可变式固定连接，这里，连接块16和传动连杆15两者之间根据不同针距的要求选择不同的固定孔来固定，同样可以实现调节针距的目的。作为另外的实施方案，转动组合轮11和传动轴套13制造成为一体式的，两者作为一个整体套设在送布轴12上；作为另外的实施方案，传动轴套13和连接块16制造成为一体式的，使得结构更加稳定。
针距调节机构10实施针距调节动作是在驱动电机50的运转下驱动的，凸轮61具有的针距调节工作面63与转动组合轮11具有的针距调节作用面111匹配，凸轮61在驱动电机50的运转下改变与针距调节作用面111之间的作用位置，转动组合轮11的转动使针距调节作用面111及整个转动组合轮11和传动轴套13一起转动一定的角度，旋转的传动轴套13带动连接的连接块16，最终使得传动连杆15改变了摆动座14的摆幅，实现凸轮61间接对摆动座14的调整，实现了缝纫机的针距调整。
在缝纫机结束缝纫需要剪线时，上述凸轮61与转动组合轮11之间具有确定送布牙7零点位置的功能。上述凸轮61具有的零点定位杆64与转动组合轮11具有的定位滑槽112之间具有工作匹配关系，零点定位杆64在驱动电机50驱动下间接对定位送布牙7施加影响，使其失去前后送布动力。当驱动电机50驱动凸轮61带动零点定位杆64旋转后，零点定位杆64旋转首先接触到喇叭口一113，并继续从喇叭口一113进入定位滑槽112，零点定位杆64推动喇叭口一113的同时也推动整个转动组合轮11和传动轴套13旋转，随传动轴套13联动的连接块16和传动连杆15推动摆动座14，被推动的摆动座14的短摆动板141和长摆动板142两者的位置为齐平状态。当凸轮61进入到定位滑槽112的零点定位杆64后，活动的零点定位杆64对静止的定位滑槽112始终对传动轴套13形成一个固定的定位，上述零点定位杆64在定位滑槽112内部运作则送布牙7即处于送布牙7零点位置。
虽然，此时的摆动座14还会在主轴电机运行下接收送料连杆17的摆动源，但是受传动连杆15推动摆动座14经送布曲柄121到达送布轴12则为静止状态，使得固定在送布轴 12的送布牙支架71停止扭转，送布牙支架71上的送布牙7失去了前后送布的动力，从而确定了送布牙7的零点位置。在上述零点定位杆64对喇叭口一113的接触作用点即为确定送布牙7零点位置的工作确定点,确定送布牙7零点位置在针板8之下驱动电机50紧接着就可以执行剪线和抬压脚动作，实现了本申请的在零点位置剪线的技术效果。
上述定位滑槽112两端进口为喇叭口一113和喇叭口二144，零点定位杆64在定位滑槽112内部可以自由滑动，即在喇叭口一113和喇叭口二144之间自由滑动，零点定位杆64在定位滑槽112的喇叭口一113和喇叭口二144之间运作，零点定位杆64无论是从喇叭口一113还是喇叭口二144进入定位滑槽112起到的定位作用是相同的。
定位零点位置后的缝纫机，驱动电机50对抬压脚机构20实施的抬压脚动作及剪线机构90实施的剪线动作，这里缝纫机还可以执行松线机构的松线动作。零点定位杆64在定位滑槽112部时，驱动电机50接下去所要执行的缝纫动作或者步骤是不限定的，可以根据缝制工艺或者缝纫机的构造来实际实施。
剪线动作具体有：驱动电机50的输出轴二52安装有剪线机构90，剪线机构90具体包括有剪线叉轮91、剪线曲柄92、连杆机构和剪线末端执行组件93，压脚顶杆和抬压脚末端执行组件通过连杆机构连接，剪线曲柄92具有剪线动杆921，上述剪线动杆921位于剪线叉轮91的剪线作用面911与空转面912之间。当零点定位杆64开始进入定位滑槽112时，立即开始上述的剪线动作，驱动电机50驱动剪线曲柄92的剪线动杆921推动剪线叉轮91的剪线作用面911，从而转动剪线叉轮91，实现剪线末端执行组件93执行剪线。
抬压脚机构20包括有：压脚顶杆21，抬压脚末端执行组件22。上述剪线动作几乎与抬压脚动作同时进行的，抬压脚动作具体有：凸轮61具有压脚工作面66和圆面62。缝纫停止后，当零点定位杆64开始进入定位滑槽112时，由于零点定位杆64、压脚工作面66和圆面62同时转动，圆面62不会对压脚顶杆21产生推力，两者的接触部位只是表面摩擦。凸轮61的压脚工作面66随着凸轮61弧度的改变而对压脚顶杆21产生抬升力，再由抬压脚末端执行组件22执行抬压脚动作，从而实现零点定位杆64在定位滑槽112内部实现抬压脚动作。
在实际的缝纫过程中，需要执行抬压脚实现改变线迹方向的缝纫，比如线迹的直角折弯。缝纫机停机后，所述零点定位杆64对喇叭口二144的接触作用点即为确定送布牙7零点位置的工作确定点，并进入定位滑槽112，此时，剪线动杆921不对剪线作用面911产生推力，只于空转面912接触空转。同时凸轮61的压脚工作面66逐渐对压脚顶杆21产生抬升力，使得压脚成功抬起，便于缝纫的线迹变向缝制，待到线迹变向放下压脚完成后零点定位杆64从喇叭口二144回退到原始零点位置。
以上所述仅为本申请的优选实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其它相关的技术领域，均同理包括在本申请的专利保护范围内。
Claims (10)
- 一种具有零点位置的缝纫机，其特征是，包括驱动电机、凸轮和针距调节机构，针距调节机构包括转动组合轮和摆动座，所述转动组合轮与摆动座连接，所述凸轮与驱动电机的输出轴一同轴连接，所述凸轮上设有零点定位杆，转动组合轮上设有与零点定位杆适配的定位滑槽，定位滑槽为圆弧槽，定位滑槽的中心线的半径与零点定位杆的轴线绕输出轴一转动的转动半径相同。
- 根据权利要求1所述的一种具有零点位置的缝纫机，其特征是，所述转动组合轮上设有喇叭口一和喇叭口二，喇叭口一和喇叭口二分别设置在定位滑槽的两端且与定位滑槽连通。
- 根据权利要求1所述的一种具有零点位置的缝纫机，其特征是，所述针距调节机构还包括送布轴、传动轴套、传动连和连接块，所述转动组合轮与传动轴套固定，传动轴套与送布轴转动连接，连接块与传动轴套固定，摆动座与传动连杆铰链，传动连杆固定在连接块上；所述凸轮上设有针距调节工作面，所述转动组合轮上设有与针距调节工作面适配的针距调节作用面。
- 根据权利要求3所述的一种具有零点位置的缝纫机，其特征是，所述连接块上设置有数个固定孔，传动连杆与其中一个固定孔固定。
- 根据权利要求3或4所述的一种具有零点位置的缝纫机，其特征是，所述凸轮通过轴孔与输出轴一同轴连接，轴孔位于针距调节工作面与零点定位杆之间，轴孔、针距调节工作面和零点定位杆处于同一直线上。
- 根据权利要求3或4所述的一种具有零点位置的缝纫机，其特征是，所述定位滑槽和针距调节作用面的开口方向相同。
- 根据权利要求3或4所述的一种具有零点位置的缝纫机，其特征是，所述定位滑槽和针距调节作用面处于不同的平面内。
- 根据权利要求1或2或3或4所述的一种具有零点位置的缝纫机，其特征是，还包括抬压脚机构，所述抬压脚机构包括压脚顶杆、连杆机构和抬压脚末端执行组件，压脚顶杆和抬压脚末端执行组件通过连杆机构连接，所述凸轮具有压脚工作面和圆面，压脚顶杆与压脚工作面或圆面接触，压脚工作面随着凸轮弧度的改变而对压脚顶杆产生抬升力，再由连杆机构传递到抬压脚末端执行组件执行抬压脚动作。
- 根据权利要求1或2或3或4所述的一种具有零点位置的缝纫机，其特征是，还包括有剪线机构，所述剪线机构包括有剪线叉轮、剪线曲柄和剪线末端执行组件，剪线曲柄包括剪线动杆，剪线叉轮包括剪线作用面与空转面，所述剪线动杆设置在位于剪线作用面与空转面之间，剪线曲柄与驱动电机的输出轴二连接。
- 根据权利要求9所述的一种具有零点位置的缝纫机，其特征是，所述驱动电机为双头动力输出驱动电机，所述驱动电机的两个输出轴分贝为输出轴一和输出轴二。
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