WO2021072971A1 - 缝纫机的剪线抬压脚机构 - Google Patents
缝纫机的剪线抬压脚机构 Download PDFInfo
- Publication number
- WO2021072971A1 WO2021072971A1 PCT/CN2019/128036 CN2019128036W WO2021072971A1 WO 2021072971 A1 WO2021072971 A1 WO 2021072971A1 CN 2019128036 W CN2019128036 W CN 2019128036W WO 2021072971 A1 WO2021072971 A1 WO 2021072971A1
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- WO
- WIPO (PCT)
- Prior art keywords
- thread trimming
- presser foot
- shaft
- connecting rod
- cam
- Prior art date
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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
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/10—Electrical or electromagnetic drives
Definitions
- the invention is a thread trimming and presser foot lifting mechanism of a sewing machine, which belongs to the technical field of sewing machines.
- the thread trimming drive of the sewing machine uses electromagnets to drive the trimming cam crank assembly to translate, so that the cylindrical surface of the roller on the trimming cam crank and the surface of the trimming cam contact each other.
- the cam is installed and fixed on the lower shaft to drive the lower shaft. Drive the cam, and then the cam drives the thread trimming cam crank to rotate through the roller, and the thread trimming crank drives the thread trimming on the thread trimming assembly to drive the crank shaft, so that the thread trimming assembly completes the thread trimming action.
- the existing sewing machine thread trimming technology uses electromagnets to trigger the thread trimming action, which has the defects of large noise, unstable thread trimming effect, and large vibration.
- the purpose of the present invention is to provide a thread trimming and presser foot lifting mechanism of a sewing machine to solve the above-mentioned background art problems.
- the present invention can independently complete the thread trimming and presser foot lifting actions through a stepper motor. And it does not interfere with each other, and the two sets of actions share one motor, reducing product costs.
- the thread trimming and presser foot mechanism of the sewing machine includes a stepping motor, a thread trimming cam, a thread trimming link, a thread trimming link shaft, a thread trimming drive shaft, Thread trimming assembly, first presser foot lifter crank, presser foot lifter cam, second presser foot lifter crank, presser foot lifter shaft and presser foot lifter assembly, the two ends of the stepping motor are respectively installed with a left motor mounting bracket and a right motor Mounting bracket, the left motor mounting bracket and the right motor mounting bracket are both installed and fixed on the casing, the left side shaft end of the stepping motor is installed with a thread trimming cam, and the casing is installed with a thread trimming shaft sleeve and a thread trimmer A connecting rod sleeve, a thread trimming drive shaft is passed through the thread trimming shaft sleeve, and the end face abuts against the thread trimming shaft sleeve, a thread trimming assembly is installed at the left end of the
- the right outer end of the thread trimming connecting rod shaft is equipped with a thread trimming connecting rod and passes through the first thread trimming connecting rod shaft.
- the first roller is mounted on the outer side of the first thread-cutting link shaft screw, and is installed and positioned by the first nut, the other end of the thread-cutting link is connected with the end of the thread-cutting drive shaft, and
- the second thread trimming connecting rod is hinged with the shaft screw, the left shaft end of the stepping motor is equipped with a thread trimming cam, and the inner groove of the thread trimming cam is in rolling contact with the first roller.
- the foot components are controlled by an electronic control program, and are driven and executed by a stepping motor.
- a presser foot support seat is installed on the casing
- a presser foot shaft is installed on the presser foot support seat
- a second presser foot crank is installed on the right side of the presser foot shaft.
- the second presser foot lifting crank and the presser foot lifting assembly are hingedly connected by the presser foot shaft screw
- the presser foot lifting shaft is provided with a presser foot lifting cam on the left side
- the stepping motor's right shaft end is provided with a first presser foot A foot crank
- a second roller is installed on the first presser foot crank and is hinged by an axial screw
- the second roller is in rolling contact and fit with the cam surface of the presser foot cam.
- presser foot raising cam is in a closed form.
- presser foot raising cam is in the form of an opening.
- a torsion spring is installed on the presser foot cam, and the torsion spring is installed between the presser foot cam and the presser foot support seat.
- torsion spring adopts a common fixed form.
- the torsion spring adopts a bolt fixing form.
- the stepping motor is electrically connected to the encoder and the motor position sensing chip through wires
- the encoder is a split encoder
- the encoder is fixed on the right side of the right motor mounting bracket
- the motor position sensing The sheet is fixed on the shaft on the right side of the stepping motor.
- the left side of the trimming connecting rod shaft is installed with a shaft card.
- the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention realizes the use of a stepping motor to independently complete the thread trimming and presser foot lifting actions without interference with each other.
- the two sets of actions share a single motor, which reduces products.
- Cost, and the operation of the stepper motor is controlled by the electronic control program, which reduces the workload of the personnel. It has the advantages of low noise, stable thread trimming, simple structure and easy installation and debugging. It solves that most of the existing technology uses electromagnets to control the thread trimming action. And the shortcomings of manual lifting of the presser foot or the electromagnet-driven presser foot lifting noise is loud and the height is not adjustable.
- Figure 1 is a schematic structural diagram of the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention
- FIG. 2 is a schematic structural view of the thread trimming cam in the thread trimming and presser foot mechanism of the sewing machine of the present invention
- Figure 3 is a right side view of the thread trimming cam in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention
- FIG. 4 is a schematic diagram of the first thread trimming connecting rod axis screw in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention
- Figure 5 is a schematic diagram of the axial screw in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention
- FIG. 6 is a schematic diagram of the torsion spring in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention
- Figure 7 is a schematic diagram of the closed presser foot lifting cam in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention.
- FIG. 8 is a schematic diagram of the open-type presser foot in the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention.
- FIG. 9 is a schematic diagram of another embodiment of the thread trimming and presser foot lifting mechanism of the sewing machine of the present invention.
- the thread trimming and presser foot mechanism of the sewing machine includes a stepping motor 3, a thread trimming cam 4, a thread trimming connecting rod 10, a thread trimming connecting rod shaft 8, and a trimmer Thread drive shaft 6, thread trimming assembly 7, first presser foot crank 22, presser foot cam 20, second presser foot crank 17, presser foot shaft 16 and presser foot assembly 18, both ends of stepping motor 3
- the left motor mounting bracket 1 and the right motor mounting bracket 2 are respectively installed. Both the left motor mounting bracket 1 and the right motor mounting bracket 2 are installed and fixed on the casing.
- the left side shaft end of the stepping motor 3 is equipped with a thread trimming cam 4, A thread trimming shaft sleeve 5 and a thread trimming connecting rod sleeve 9 are installed on the shell.
- a thread trimming drive shaft 6 is passed through the thread trimming shaft sleeve 5, and the end face abuts against the thread trimming shaft sleeve 5, and the left end of the thread trimming drive shaft 6 is installed
- the thread trimming connecting rod shaft sleeve 9 is provided with a thread trimming connecting rod shaft 8, and the end face abuts the thread trimming connecting rod shaft sleeve 9, and the right outer end of the thread trimming connecting rod shaft 8 is installed with a trimmer
- the thread connecting rod 10 is hinged by the first thread trimming connecting rod axis screw 11, and the first roller 12 is installed on the outside of the first thread trimming connecting rod axis screw 11, and is installed and positioned by the first nut 13, and the thread trimming connecting rod
- the other end of the rod 10 is connected to the end of the thread trimming drive shaft 6 and is hinged
- the left shaft end of the stepping motor 3 is equipped with a thread trimming cam 4, and the thread trimming cam 4
- the groove is matched with the first roller 12 in rolling contact.
- the thread trimming assembly 7 and the presser foot lifting assembly 18 are both controlled by the electronic control program and driven and executed by the stepping motor 3.
- the stepping motor 3 rotates forward and drives the thread trimming cam 4 to rotate
- the thread trimming cam 4 drives the first roller 12 in the groove to move, and drives the thread trimming link 10 to move.
- the thread trimming link 10 drives the thread trimming assembly 7 through the thread trimming drive shaft 6 to complete the thread trimming action, and the thread trimming is completed.
- the thread trimming cam 4 is driven to rotate to restore the thread trimming assembly 7 to the initial state.
- the stepping motor 3 When the stepping motor 3 is driving the thread trimming, the first right end of the stepping motor 3 The presser foot lifting crank 22 and the second presser foot cam 20 are in a separate state, and the presser foot has no effect.
- the stepping motor 3 When the stepping motor 3 is driving the presser foot lifting action, the first roller 12 is at the left end of the stepping motor 3
- the thread trimming cam 4 has no changing position area, the thread trimming has no effect, the operation is simple, and the use effect is good.
- the stepping motor 3 can independently complete the thread trimming and presser foot lifting actions without interference. The two sets of actions share a single motor. Reduce product cost, and use stepper motor to drive, has the advantages of low noise, stable wire cutting, simple structure and easy installation and debugging.
- a presser foot support base 15 is installed on the casing, a presser foot shaft 16 is mounted on the presser foot support base 15, and a second presser foot crank 17 and a second presser foot crank are mounted on the right side of the presser foot shaft 16 17 and the presser foot lifting assembly 18 are hinged with the presser foot lifting shaft screw 19, the presser foot lifting shaft 16 is equipped with a presser foot lifting cam 20 on the left side, and the right shaft end of the stepping motor 3 is equipped with a first presser foot lifting crank 22, A second roller 23 is installed on the first presser foot crank 22 and is hinged by an axis screw 24.
- the second roller 23 is in rolling contact with the cam surface of the presser foot cam 20, and the stepping motor 3 reverses to drive
- the first presser foot crank 22 rotates, the second roller 23 on the first presser foot crank 22 drives the presser foot cam 20 to move, and the presser foot cam 20 passes through the presser foot shaft 16 and the second presser foot crank 17
- the presser foot lifting assembly 18 is driven, so that the presser foot lifting assembly 18 completes the presser foot lifting action.
- the presser foot raising cam 20 is in a closed form.
- the presser foot raising cam 20 is in the form of an opening.
- a torsion spring 21 is installed on the presser foot cam 20, and the torsion spring 21 is installed between the presser foot cam 20 and the presser foot support base 15 to facilitate the resetting of the presser foot cam 20.
- the torsion spring 21 adopts an ordinary fixed form.
- the torsion spring 21 is fixed by bolts, which expands the way of fixing the torsion spring 21.
- the stepping motor 3 is electrically connected to the encoder 27 and the motor position sensor 28 through wires.
- the encoder 27 is a split encoder 27, and the encoder 27 is fixed on the right side of the right motor mounting bracket 2, and the motor position sensor 28 It is fixed on the shaft on the right side of the stepping motor 3 to realize the electronic control program control of the stepping motor 3.
- a shaft clamp 25 is installed on the left side of the thread trimming connecting rod shaft 8 to facilitate the positioning of the first roller 12.
- one end of the thread trimming drive shaft 6 is installed with a thread trimming assembly 7, the other end of the thread trimming drive shaft 6 is installed with an axis screw 24, and the axis screw 24 is installed with a first A roller 12, a thread trimming cam 4 is installed and fixed on the stepping motor 3.
- the first roller 12 is in contact with the cam surface of the thread trimming cam 4, and the stepping motor 3 drives the thread trimming cam 4, which is driven by the first roller 12
- the thread trimming drive shaft 6 moves, and finally drives the thread trimming assembly 7 to complete the thread trimming action.
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- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
缝纫机的剪线抬压脚机构，包括步进电机（3）、机壳、剪线连杆（10）、剪线连杆轴（8）、剪线驱动轴（6）以及剪线组件（7），步进电机（3）左侧轴端安装有剪线凸轮（4），机壳上安装有剪线轴套（5）和剪线连杆轴套（9），剪线轴套（5）上穿设有剪线驱动轴（6），剪线驱动轴（6）的左端安装有剪线组件（7），剪线连杆轴套（9）上穿设有剪线连杆轴（8），剪线连杆轴（8）的右侧外端安装有剪线连杆（10），且通过第一剪线连杆轴位螺钉（11）铰接，第一剪线连杆轴位螺钉（11）外侧安装有第一滚柱（12），剪线连杆（10）的另一端与剪线驱动轴（6）端部连接。该机构采用一个步进电机（3）独立完成剪线和抬压脚的动作，减少产品成本，且通过电控程序控制步进电机（3）的运行，降低了人员的工作量。
Description
本发明是缝纫机的剪线抬压脚机构，属于缝纫机技术领域。
现有技术，缝纫机的剪线驱动是电磁铁带动切线凸轮曲柄组件平移，使剪线凸轮曲柄上的滚轮的圆柱面与剪线凸轮上的面相互接触，凸轮安装固定在下轴上，驱动下轴带动凸轮，然后凸轮通过滚轮带动剪线凸轮曲柄转动，剪线曲柄带动剪线组件上的剪线驱动曲柄轴，使剪线组件完成剪线动作。现有的缝纫机剪线技术通过电磁铁触发剪线动作有噪音大、剪线效果不稳定、且振动大的缺陷。
现有技术，抬压脚方式大都为电磁铁控制压脚的抬起或者下降，或者采用人的膝盖顶靠膝靠来控制压脚的抬起或者下降，电磁铁驱动的缺陷在于压脚的高低不可调，且噪音比较大，用人的膝盖顶靠膝靠抬压脚的缺陷在于，需要用很大的力才能抬起压脚，缝制工厂的缝纫机操作大都为女性，这种方式在实际操作中是比较费劲的。
发明内容
针对现有技术存在的不足，本发明目的是提供缝纫机的剪线抬压脚机构，以解决上述背景技术中提出的问题,本发明通过步进电机能独立完成剪线和抬压脚的动作，且互不干涉，两套动作共用一个电机，减少产品成本。
为了实现上述目的，本发明是通过如下的技术方案来实现：缝纫机的剪线抬压脚机构，包括步进电机、剪线凸轮、剪线连杆、剪线连杆轴、剪线驱动轴、剪线组件、第一抬压脚曲柄、抬压脚凸轮、第二抬压脚曲柄、抬压脚轴以及抬压脚组件，所述步进电机两端分别安装有左电机安装支架和右电机安装支架，所述左电机安装支架和右电机安装支架均安装固定在 机壳上，所述步进电机左侧轴端安装有剪线凸轮，所述机壳上安装有剪线轴套和剪线连杆轴套，所述剪线轴套上穿设有剪线驱动轴，且端面与剪线轴套相抵靠，所述剪线驱动轴的左端安装有剪线组件，所述剪线连杆轴套上穿设有剪线连杆轴，且端面与剪线连杆轴套相抵靠，所述剪线连杆轴的右侧外端安装有剪线连杆，且通过第一剪线连杆轴位螺钉铰接，所述第一剪线连杆轴位螺钉外侧安装有第一滚柱，且通过第一螺母安装定位，所述剪线连杆的另一端与剪线驱动轴端部连接，且通过第二剪线连杆轴位螺钉铰接，所述步进电机左侧轴端安装有剪线凸轮，且剪线凸轮内槽与第一滚柱滚动接触配合，所述剪线组件和抬压脚组件均由电控程序控制，且由步进电机驱动执行。
进一步地，所述机壳上安装有抬压脚支撑座，所述抬压脚支撑座上安装有抬压脚轴，所述抬压脚轴右侧安装有第二抬压脚曲柄，所述第二抬压脚曲柄与抬压脚组件通过抬压脚轴位螺钉铰接，所述抬压脚轴左侧安装有抬压脚凸轮，所述步进电机右侧轴端安装有第一抬压脚曲柄，所述第一抬压脚曲柄上安装有第二滚柱，且通过轴位螺钉铰接，所述第二滚柱与抬压脚凸轮的凸轮面滚动接触配合。
进一步地，所述抬压脚凸轮是封闭形式的。
进一步地，所述抬压脚凸轮是开口形式的。
进一步地，所述抬压脚凸轮上安装有扭簧，且扭簧安装在抬压脚凸轮与抬压脚支撑座之间。
进一步地，所述扭簧采用普通固定形式。
进一步地，所述扭簧采用螺栓固定形式。
进一步地，所述步进电机通过导线分别与编码器以及电机位置感应片电性连接，所述编码器为分体式编码器，且编码器固定在右电机安装支架右侧，所述电机位置感应片固定在步进电机右侧的轴上。
进一步地，所述剪线连杆轴的左侧安装有轴卡.
本发明的有益效果：本发明的缝纫机的剪线抬压脚机构，实现了采用一个步进电机独立完成剪线和抬压脚的动作，且互不干涉，两套动作共用一个电机，减少产品成本，且通过电控程序控制步进电机的运行，降低了人员的工作量，具有噪音低，剪线稳定，结构简单易安装调试等优点，解决现有技术大都用电磁铁控制剪线动作，以及人工抬压脚费劲或电磁铁驱动压脚升降噪音大且高度不可调的缺点。
通过阅读参照以下附图对非限制性实施例所作的详细描述，本发明的其它特征、目的和优点将会变得更明显：
图1为本发明缝纫机的剪线抬压脚机构的结构示意图；
图2为本发明缝纫机的剪线抬压脚机构中剪线凸轮的结构示意图；
图3为本发明缝纫机的剪线抬压脚机构中剪线凸轮的右视示意图；
图4为本发明缝纫机的剪线抬压脚机构中第一剪线连杆轴位螺钉的示意图；
图5为本发明缝纫机的剪线抬压脚机构中轴位螺钉的示意图；
图6为本发明缝纫机的剪线抬压脚机构中扭簧的示意图；
图7为本发明缝纫机的剪线抬压脚机构中闭合式抬压脚凸轮的示意图；
图8为本发明缝纫机的剪线抬压脚机构中开口式套压脚的示意图；
图9为本发明缝纫机的剪线抬压脚机构的另一实施方式的示意图；
图中：1-左电机安装支架、2-右电机安装支架、3-步进电机、4-剪线凸轮、5-剪线轴套、6-剪线驱动轴、7-剪线组件、8-剪线连杆轴、9-剪线连杆轴套、10-剪线连杆、11-第一剪线连杆轴位螺钉、12-第一滚柱、13-第一螺母、14-第二剪线连杆轴位螺钉、15-抬压脚支撑座、16-抬压脚轴、17-第二抬压脚曲柄、18-抬压脚组件、19-抬压脚轴位螺钉、20-抬压脚凸轮、21-扭簧、22-第一抬压脚曲柄、23-第二滚柱、24-轴位螺钉、25-轴卡、26-第二螺母、27-编码器、28-电机位置感应片。
为使本发明实现的技术手段、创作特征、达成目的与功效易于明白了解，下面结合具体实施方式，进一步阐述本发明。
请参阅图1至图8，本发明提供一种技术方案：缝纫机的剪线抬压脚机构，包括步进电机3、剪线凸轮4、剪线连杆10、剪线连杆轴8、剪线驱动轴6、剪线组件7、第一抬压脚曲柄22、抬压脚凸轮20、第二抬压脚曲柄17、抬压脚轴16以及抬压脚组件18，步进电机3两端分别安装有左电机安装支架1和右电机安装支架2，左电机安装支架1和右电机安装支架2均安装固定在机壳上，步进电机3左侧轴端安装有剪线凸轮4，机壳上安装有剪线轴套5和剪线连杆轴套9，剪线轴套5上穿设有剪线驱动轴6，且端面与剪线轴套5相抵靠，剪线驱动轴6的左端安装有剪线组件7，剪线连杆轴套9上穿设有剪线连杆轴8，且端面与剪线连杆轴套9相抵靠，剪线连杆轴8的右侧外端安装有剪线连杆10，且通过第一剪线连杆轴位螺钉11铰接，第一剪线连杆轴位螺钉11外侧安装有第一滚柱12，且通过第一螺母13安装定位，剪线连杆10的另一端与剪线驱动轴6端部连接，且通过第二剪线连杆轴位螺钉14铰接，步进电机3左侧轴端安装有剪线凸轮4，且剪线凸轮4内槽与第一滚柱12滚动接触配合，剪线组件7和抬压脚组件18均由电控程序控制，且由步进电机3驱动执行，步进电机3正转，带动剪线凸轮4旋转，剪线凸轮4驱动槽内第一滚柱12运动，带动剪线连杆10运动，剪线连杆10通过剪线驱动轴6驱动剪线组件7完成剪线动作，且剪线完成后步进电机3反转复位到起始位置时，带动剪线凸轮4旋转使剪线组件7恢复到起始状态，当步进电机3在执行驱动剪线动作时，步进电机3右端的第一抬压脚曲柄22与第二抬压脚凸轮20处于分开状态，抬压脚不发生作用，当步进电机3在执行驱动抬压脚动作时，在步进电机3左端第一滚柱12处于剪线凸轮4无变化位置区域，剪线不发生作用，操作简单，使用效果好，步进电机3能独立完成剪线和抬压脚的动作，且互不干涉，两套动 作共用一个电机，减少产品成本，且采用步进电机进行驱动，具有噪音低，剪线稳定，结构简单易安装调试等优点。
机壳上安装有抬压脚支撑座15，抬压脚支撑座15上安装有抬压脚轴16，抬压脚轴16右侧安装有第二抬压脚曲柄17，第二抬压脚曲柄17与抬压脚组件18通过抬压脚轴位螺钉19铰接，抬压脚轴16左侧安装有抬压脚凸轮20，步进电机3右侧轴端安装有第一抬压脚曲柄22，第一抬压脚曲柄22上安装有第二滚柱23，且通过轴位螺钉24铰接，第二滚柱23与抬压脚凸轮20的凸轮面滚动接触配合，步进电机3反转，带动第一抬压脚曲柄22旋转，第一抬压脚曲柄22上的第二滚柱23带动抬压脚凸轮20运动，抬压脚凸轮20通过抬压脚轴16与第二抬压脚曲柄17驱动抬压脚组件18，使抬压脚组件18完成抬压脚动作。
抬压脚凸轮20是封闭形式的。
抬压脚凸轮20是开口形式的。
抬压脚凸轮20上安装有扭簧21，且扭簧21安装在抬压脚凸轮20与抬压脚支撑座15之间，便于对抬压脚凸轮20进行复位。
扭簧21采用普通固定形式。
扭簧21采用螺栓固定形式，扩大了对扭簧21的固定方式。
步进电机3通过导线分别与编码器27以及电机位置感应片28电性连接，编码器27为分体式编码器27，且编码器27固定在右电机安装支架2右侧，电机位置感应片28固定在步进电机3右侧的轴上，实现了对步进电机3进行电控程序控制。
剪线连杆轴8的左侧安装有轴卡25，便于对第一滚柱12进行限位。
请参阅图9，作为本发明的一个实施例：剪线驱动轴6一端安装有剪线组件7，剪线驱动轴6的另一端安装有轴位螺钉24，且轴位螺钉24上安装有第一滚柱12，步进电机3上安装固定有剪线凸轮4，第一滚柱12与剪线 凸轮4的凸轮面相接触，步进电机3驱动剪线凸轮4，通过第一滚柱12带动剪线驱动轴6运动，最后带动剪线组件7完成剪线动作。
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，虽然本发明已以较佳实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。
Claims (9)
- 缝纫机的剪线抬压脚机构，包括步进电机、剪线凸轮、剪线连杆、剪线连杆轴、剪线驱动轴、剪线组件、第一抬压脚曲柄、抬压脚凸轮、第二抬压脚曲柄、抬压脚轴以及抬压脚组件，其特征在于：所述步进电机两端分别安装有左电机安装支架和右电机安装支架，所述左电机安装支架和右电机安装支架均安装固定在机壳上，所述步进电机左侧轴端安装有剪线凸轮，所述机壳上安装有剪线轴套和剪线连杆轴套，所述剪线轴套上穿设有剪线驱动轴，且端面与剪线轴套相抵靠，所述剪线驱动轴的左端安装有剪线组件，所述剪线连杆轴套上穿设有剪线连杆轴，且端面与剪线连杆轴套相抵靠，所述剪线连杆轴的右侧外端安装有剪线连杆，且通过第一剪线连杆轴位螺钉铰接，所述第一剪线连杆轴位螺钉外侧安装有第一滚柱，且通过第一螺母安装定位，所述剪线连杆的另一端与剪线驱动轴端部连接，且通过第二剪线连杆轴位螺钉铰接，所述步进电机左侧轴端安装有剪线凸轮，且剪线凸轮内槽与第一滚柱滚动接触配合，所述剪线组件和抬压脚组件均由电控程序控制，且由步进电机驱动执行。
- 根据权利要求1所述的缝纫机的剪线抬压脚机构，其特征在于：所述机壳上安装有抬压脚支撑座，所述抬压脚支撑座上安装有抬压脚轴，所述抬压脚轴右侧安装有第二抬压脚曲柄，所述第二抬压脚曲柄与抬压脚组件通过抬压脚轴位螺钉铰接，所述抬压脚轴左侧安装有抬压脚凸轮，所述步进电机右侧轴端安装有第一抬压脚曲柄，所述第一抬压脚曲柄上安装有第二滚柱，且通过轴位螺钉铰接，所述第二滚柱与抬压脚凸轮的凸轮面滚动接触配合。
- 根据权利要求2所述的缝纫机的剪线抬压脚机构，其特征在于：所述抬压脚凸轮是封闭形式的。
- 根据权利要求2所述的缝纫机的剪线抬压脚机构，其特征在于：所 述抬压脚凸轮是开口形式的。
- 根据权利要求2所述的缝纫机的剪线抬压脚机构，其特征在于：所述抬压脚凸轮上安装有扭簧，且扭簧安装在抬压脚凸轮与抬压脚支撑座之间。
- 根据权利要求5所述的缝纫机的剪线抬压脚机构，其特征在于：所述扭簧采用普通固定形式。
- 根据权利要求5所述的缝纫机的剪线抬压脚机构，其特征在于：所述扭簧采用螺栓固定形式。
- 根据权利要求1所述的缝纫机的剪线抬压脚机构，其特征在于：所述步进电机通过导线分别与编码器以及电机位置感应片电性连接，所述编码器为分体式编码器，且编码器固定在右电机安装支架右侧，所述电机位置感应片固定在步进电机右侧的轴上。
- 根据权利要求1所述的缝纫机的剪线抬压脚机构，其特征在于：所述剪线连杆轴的左侧安装有轴卡。
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