WO2023230847A1 - 一种缝纫机的步进剪线抬压脚装置 - Google Patents

一种缝纫机的步进剪线抬压脚装置 Download PDF

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Publication number
WO2023230847A1
WO2023230847A1 PCT/CN2022/096265 CN2022096265W WO2023230847A1 WO 2023230847 A1 WO2023230847 A1 WO 2023230847A1 CN 2022096265 W CN2022096265 W CN 2022096265W WO 2023230847 A1 WO2023230847 A1 WO 2023230847A1
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Prior art keywords
cam
presser foot
sewing machine
rod
stepping
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PCT/CN2022/096265
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English (en)
French (fr)
Inventor
疏丹
嵇建国
戴惠良
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安徽杰羽制鞋机械科技有限公司
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Priority to PCT/CN2022/096265 priority Critical patent/WO2023230847A1/zh
Publication of WO2023230847A1 publication Critical patent/WO2023230847A1/zh

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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

Definitions

  • the invention relates to the technical field of sewing machines, and in particular to a stepping thread trimming and presser foot lifting device for a sewing machine.
  • roller trolleys there are many types of roller trolleys in the current market, such as: servo direct-drive roller trolleys, three-automatic roller trolleys, three-step roller trolleys, and traditional roller trolleys. They are mainly used in manufacturing enterprises such as shoemaking, luggage, and car seat cushions; in the conventional traditional shoemaking machine market , the thread trimming and presser foot lifting mechanisms are generally driven independently by electromagnets. It is common that the presser foot lifter makes a loud sound when it is raised and lowered, and the thread trimming sound is loud. Moreover, the presser foot height adjustment and thread trimming time cannot be adjusted visually, and the adjustment is inaccurate and Troublesome to adjust.
  • the technical problem to be solved by the present invention is to provide a stepping thread trimming and presser foot lifting device for a sewing machine.
  • the present invention provides the following technical solutions:
  • a stepping thread trimming and presser foot lifting device for a sewing machine mainly includes three major mechanisms: a presser foot lifting mechanism, a thread trimming mechanism and a stepping motor driving mechanism;
  • the stepper motor driving mechanism includes a stepper motor, and the stepper motor is fixedly connected to the sewing machine housing through a motor base;
  • the presser foot lifting mechanism includes a salad base set that is rotatably connected to the sewing machine casing through a connecting pin and a vertically movable pressure rod.
  • the pressure rod is fixedly covered with a pressure rod holder, and the pressure rod holder is 18 is provided with a cross bar, and the salad center seat group is provided with a lifting bar, which is placed below the cross bar, between the pressure rod holder and the presser foot pressure regulating knob fixed on the sewing machine casing.
  • There is a spring and the bottom end of the pressure rod is connected to the front wheel assembly.
  • the stepper motor drives the salad core seat group through the connecting rod structure.
  • the lift rod lifts up the cross bar and the pressure rod lifts;
  • the thread trimming mechanism includes a knife holder fixed on the sewing machine housing.
  • the knife holder is provided with a fixed fixed knife and a movable movable knife.
  • the movable knife contacts and cooperates with the fixed knife.
  • the movable knife is connected with the fixed knife through a connecting structure.
  • the stepper motor contacts and drives the movable knife to rotate.
  • a cam is connected to the output shaft of the stepper motor, a tension spring pin is provided on the motor base, and the tension spring pin is connected to the first tension spring;
  • the connecting rod structure includes a spring pin fixed on the sewing machine housing.
  • the mounting seat and the swing rod seat, the cam swing arm is rotationally connected to the mounting seat through a connecting pin, one end of the cam swing arm is connected to the first tension spring, the end is close to the cam side wall, and the other end is connected to the bottom end of the long connecting rod Rotation connection, the top end of the long connecting rod is rotatably connected to the fork bar, the fork bar is rotatably connected to the fork bar seat through a connecting pin, and the salad salad seat set and the fork bar are connected through the arch connection lever.
  • one end of the cam swing arm is connected to a bearing through a connecting pin, the first tension spring pulls the cam swing arm, and the bearing is in contact with the cam side wall.
  • connection structure includes a vertical shaft rotatably connected to the sewing machine housing.
  • the upper end side wall of the vertical shaft is provided with a tooth surface
  • the knife holder is provided with a rotatable shaft
  • the lower end of the shaft is provided with a tooth surface.
  • the upper end of the shaft is connected to the movable knife.
  • the lower end of the vertical shaft is provided with a swing bar.
  • the swing bar is hinged with a thread-trimming pull rod.
  • the end of the thread-trimming pull rod is provided with a stop.
  • a cam arm is provided at the longest radius of the cam.
  • the stepper motor drives the cam arm to push against the stopper.
  • the thread-trimming rod is provided with a second tension spring connected to the sewing machine housing.
  • the cam arm is connected with a bearing through a connecting pin, and the bearing is in contact with the stopper.
  • the shortest radius of the cam is in contact with one end of the cam swing arm, and the cam arm is separated from the stopper.
  • the cam rotates clockwise, and the contact position between the cam and the cam swing arm moves from the shortest radius to the longest radius, and the squeeze cam swing arm swings around the mounting seat; the cam rotates counterclockwise, and the cam arm contacts the stop. , the displacement of the squeeze stop, and at the same time, the contact position of the cam and the cam swing arm is located at the shortest radius.
  • a stepping motor is designed on the existing roller car to simultaneously control the presser foot lifting and thread trimming mechanisms.
  • the stepping thread trimming and presser foot lifting device can achieve lighter presser foot lifting and thread trimming sounds, and the parameters can be visualized and accurately adjusted. , such as digitally adjusting the presser foot height and thread trimming time.
  • Figure 1 is a schematic diagram of the structure of a sewing machine's stepping thread trimming and presser foot lifting device without the casing;
  • Figure 2 is a schematic diagram of the structure and housing of a stepping thread trimming and presser foot lifting device of a sewing machine
  • Figure 3 is a schematic diagram of the stepper motor driving mechanism
  • Figure 4 is a schematic diagram of the presser foot lifting mechanism
  • Figure 5 is a schematic diagram of the thread trimming mechanism
  • Figure 6 is a schematic structural diagram of the working principle of a stepping thread trimming and presser foot lifting device of a sewing machine.
  • Stepper motor 2. Motor base; 3. Cam arm; 4. Cam; 5. Bearing; 6. Cam swing arm; 7. Mounting base; 8. First tension spring; 9. Tension spring pin 10. Long Connecting rod; 11. Swing bar; 12. Cross bar; 13. Swing bar seat; 14. Arch connecting lever; 15. Salad center seat set; 16. Presser foot pressure adjusting knob 17. Spring; 18. Pressure rod holder ; 19. Pressing rod; 20. Front wheel assembly; 21. Fixed knife; 22. Lifting rod; 23. Moving knife; 24. Knife holder; 25. Thread trimming transmission gear; 26. Casing in the cauldron shaft; 27. Pendulum Rod 28, trimming rod; 29, vertical axis; 30, stopper; 31, second tension spring.
  • Lathes work on a variety of fabrics, some thin and some thick. Thin materials do not require high pressure foot height (affecting lathe efficiency), and thick materials require insufficient presser foot height. Adjust the presser foot height according to the needs of the fabric. Traditional debugging steps are many and cumbersome; each machine The thread trimming time will vary and needs to be fine-tuned within a certain range. Traditional debugging steps are many and cumbersome; therefore, digital adjustment of the presser foot height and thread trimming time solves the above problems very well.
  • a stepping thread trimming and presser foot lifting device of a sewing machine mainly includes three major mechanisms: a presser foot lifting mechanism, a thread trimming mechanism and a stepping motor driving mechanism;
  • the stepper motor driving mechanism includes a stepper motor 1, which is fixedly connected to the sewing machine housing through a motor base 2;
  • the presser foot lifting mechanism includes a salad seat set 15 that is rotatably connected to the sewing machine housing through a connecting pin and a vertically movable pressure bar 19.
  • the pressure bar 19 is fixedly covered with a pressure bar holder 18.
  • the pressure rod holder 18 is provided with a cross bar 12, and the salad center seat group 15 is provided with a lifting rod 22, which is placed below the cross bar.
  • the pressure rod holder 18 is fixed on the sewing machine casing.
  • the bottom end of the pressure rod 19 is connected to the front wheel assembly 20.
  • the stepper motor 1 drives the salad core seat group 15 through the connecting rod structure, and the lifting rod 22 lifts the horizontal Rod 12, pressure rod 19 lifts;
  • the thread trimming mechanism includes a knife holder 24 fixed on the sewing machine housing.
  • the knife holder is provided with a fixed fixed knife 21 and a movable movable knife 23.
  • the movable knife 23 contacts and cooperates with the fixed knife 21.
  • the knife 23 contacts the stepper motor 1 through the connecting structure to drive the movable knife 23 to rotate.
  • the presser foot lifting mechanism and the thread trimming mechanism are controlled by the same stepper motor, but they work separately, that is, when the presser foot lifting mechanism is working, the thread trimming mechanism does not work.
  • the stepper motor When the present invention is in use, the stepper motor is turned on and rotates clockwise to pull the salad base set 15.
  • the lifting rod 22 lifts the cross bar 12 and the pressure rod 19 is lifted, thereby realizing the presser foot lifting function and the stepper motor returns to zero. position, the pressure rod 19 is squeezed by the spring 17, and the pressure rod 19 moves downward;
  • the stepper motor rotates counterclockwise, and the movable knife 23 contacts the stepper motor 1 through the connecting structure, driving the movable knife 23 to rotate.
  • the stepper motor returns to the zero position, it drives the thread trimming rod 28 back to the original position through the second tension spring. , thereby realizing the thread trimming function.
  • Embodiment 2 as an optimization solution of Embodiment 1, a cam 4 is connected to the output shaft of the stepper motor 1, a tension spring pin 9 is provided on the motor base 2, and the tension spring pin 9 is connected to the first tension spring. 8;
  • the connecting rod structure includes a mounting base 10 and a swing lever base 13 fixed on the sewing machine housing.
  • the cam swing arm 6 is rotationally connected to the mounting base 10 through a connecting pin.
  • One end of the cam swing arm 6 is connected to the first puller.
  • the spring 8 is connected, one end is close to the side wall of the cam 4, and the other end is rotationally connected to the bottom end of the long connecting rod 10.
  • the top end of the long connecting rod 10 is rotationally connected to the swing bar 11, and the swing bar 11 is rotationally connected to the connecting pin.
  • the salad seat set 15 and the swing bar 11 are connected through the arch connecting lever 14.
  • stepper motor is turned on and rotates clockwise.
  • the cam 4 rotates clockwise, and the position where the cam 4 contacts the cam swing arm 6 changes from the shortest radius. Move to the longest radius, squeeze the cam swing arm 6 to swing around the mounting base 7. Specifically, one end of the cam swing arm 6 is pressed down, and the other end (that is, the section connected to the long connecting rod 10) moves up, pushing the long connecting rod 10 Ascending, the long connecting rod 10 pushes one end of the swing bar 11 up, the swing bar 11 rotates around the connecting pin, and the other end moves down, pulling the foot arch connecting lever 14, thereby pulling the salad center seat group 15, and driving the lifting rod 22 to push up the cross bar 12.
  • the press rod 19 is raised to realize the presser foot lifting function.
  • Embodiment 3 as an optimization solution of Embodiment 2, one end of the cam swing arm 6 is connected to a bearing through a connecting pin, the first tension spring 8 pulls the cam swing arm 6, and the bearing is in contact with the side wall of the cam 4.
  • This embodiment is implemented in such a way that through the contact between the bearing and the cam swing arm 6, friction is reduced and noise is reduced at the same time.
  • connection structure includes a vertical shaft 29 that is rotatably connected to the sewing machine housing.
  • the upper end side wall of the vertical shaft 29 is provided with a tooth surface 26, and the knife holder 24
  • the upper end of the shaft is connected to the movable knife 23.
  • the lower end of the vertical shaft is provided with a fork 27, and the fork 27 is hinged with a Thread trimming pull rod 28, the end of the thread trimming pull rod 28 is provided with a stop 30, the longest radius of the cam 4 is provided with a cam arm 6, the stepper motor 1 drives the cam arm 6 to push against the stop,
  • the thread trimming pull rod 28 is provided with a second tension spring 31 connected to the sewing machine housing.
  • the stepper motor is turned on and rotates counterclockwise.
  • the cam 4 rotates counterclockwise, the cam arm 6 contacts the stopper 30, and the stopper 30 is squeezed and displaced.
  • Pull the thread trimming lever to move, and the thread trimming lever is hinged with the swing bar to control the rotation of the vertical axis.
  • the meshing of the thread trimming transmission gear and the tooth surface drives the axis to rotate, thereby controlling the rotation and step of the movable knife.
  • the second tension spring drives the thread trimming rod 28 back to the original position, thereby completing the thread trimming function;
  • Embodiment 5 as an optimization solution of Embodiment 4, the cam arm 3 is connected with a bearing 5 through a connecting pin, and the bearing 5 is in contact with the stopper 30 .
  • This embodiment is implemented in such a way that through the contact between the bearing and the cam arm 3, friction is reduced and noise is reduced at the same time.
  • Embodiment 6 the working method of the present invention is:
  • the cam 4 rotates clockwise.
  • the contact position between the cam 4 and the cam swing arm 6 moves from the shortest radius to the longest radius.
  • the squeeze cam swing arm 6 swings around the mounting base 7. Specifically, one end of the cam swing arm 6 is pressed down, and the other end (that is, the connecting section with the long connecting rod 10) moves up, pushing the long connecting rod 10 to rise, and the long connecting rod 10 pushes one end of the swing rod 11 to rise, and the swing rod 11 goes around the connecting pin Rotate, the other end moves down, pull the foot arch connecting lever 14, thereby pulling the salad center seat group 15, driving the lifting rod 22 to push up the cross bar 12, and the pressing rod 19 to lift, thereby realizing the function of lifting the presser foot.
  • stepper motor Turn on the stepper motor and rotate it counterclockwise.
  • the cam 4 rotates counterclockwise.
  • the cam arm 6 contacts the block 30 and squeezes the block 30 for displacement.
  • the block pulls the thread trimming lever to move, and the thread trimming lever is hinged with the swing rod, thereby Control the rotation of the vertical axis.
  • the thread-trimming transmission gear meshes with the tooth surface to drive the shaft to rotate, thereby controlling the rotation of the movable knife.
  • stepper motor returns to the zero position, it drives the thread-trimming lever through the second tension spring. 28 returns to the original position to complete the thread trimming function.
  • Thread trimming function When the stepper motor rotates 14.66° counterclockwise, it drives the thread trimming lever 28 to have a stroke of 10.5mm. The thread trimming lever 28 drives the thread trimming transmission gear 25 and the movable knife 23 to rotate. The stepper motor returns to the zero position and passes through the second thread at the same time. The tension spring drives the thread trimming lever 28 back to its original position, thereby completing the thread trimming function;
  • Presser foot lift function When the stepper motor rotates 100.33° clockwise, the cam arm 3 drives the presser foot lift linkage mechanism to rotate the salad center seat group 15 by 21.27°, and the presser foot lift is lifted by 10mm, thus realizing the presser foot lift function;

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  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

本发明提出的一种缝纫机的步进剪线抬压脚装置，涉及缝纫机技术领域，打开步进电机，顺时针转动，拉动所述沙拉心座组，抬杆顶起横杆，压棒提升，从而实现抬压脚功能，步进电机回零位，压棒通过弹簧挤压，压棒下移工作；步进电机逆时针转动，所述动刀通过连接结构与步进电机接触，驱动动刀转动，步进电机回零位的同时通过第二拉簧带动剪线拉杆回到原位，从而实现剪线功能完成。本发明的一个步进电机同时控制抬压脚及剪线机构，步进剪线抬压脚装置可以实现抬压脚和剪线声音更轻，参数可以可视化精准调节，比如数字化调节压脚高度和剪线时间。

Description

一种缝纫机的步进剪线抬压脚装置 技术领域
本发明涉及缝纫机技术领域，特别涉及一种缝纫机的步进剪线抬压脚装置。
背景技术
现有市场罗拉车机型很多如：伺服直驱罗拉车、三自动罗拉车、三步进罗拉车和传统等，主要用于制鞋、箱包、汽车坐垫等制造企业；在常规传统鞋机市场，剪线、抬压脚机构一般采用电磁铁独立驱动，普遍存在抬压脚抬起和下落时声音大，剪线声音响，且压脚高度调节和剪线时间不可可视化调节，调节不精准且调节麻烦。
发明内容
本发明所要解决的技术问题是提供一种缝纫机的步进剪线抬压脚装置。
为解决上述问题，本发明提供以下的技术方案：
一种缝纫机的步进剪线抬压脚装置，该装置主要包含三大机构：抬压脚机构、剪线机构和步进电机驱动机构；
所述步进电机驱动机构，包括步进电机，所述步进电机通过电机座固定连接在缝纫机壳体上；
所述抬压脚机构包括通过连接销转动连接在缝纫机壳体上的沙拉心座组和可竖向移动的压棒，所述压棒上固定套有压棒固定座，所述压棒固定座18上设有横杆，所述沙拉心座组上设有抬杆，所述抬杆顶在横杆下方，所述压棒固定座与固定在缝纫机壳体上的压脚调压旋钮之间设有弹簧，压棒底端连接轮前组件，所述步进电机驱动通过连杆结构拉动所述沙拉心座组，抬杆顶 起横杆，压棒提升；
所述剪线机构，包括固定在缝纫机壳体上的刀座，所述刀座上设有固定的定刀和活动的动刀，动刀与定刀接触配合，所述动刀通过连接结构与步进电机接触，驱动动刀转动。
本发明的进一步技术：
优选的，所述步进电机的输出轴上连接凸轮，所述电机座上设有拉簧销，所述拉簧销连接第一拉簧；所述连杆结构包括固定在缝纫机壳体上的安装座和摆杆座，凸轮摆臂通过连接销转动连接在安装座，所述凸轮摆臂一端通过与第一拉簧连接，端部紧靠在凸轮侧壁，另一端与长连杆底端转动连接，所述长连杆顶端转动连接摆杆，所述摆杆通过连接销转动连接在摆杆座上，所述沙拉心座组与摆杆通过脚弓连接杠杆连接。
优选的，所述凸轮摆臂一端的端部通过连接销连接有轴承，第一拉簧拉动凸轮摆臂，轴承与凸轮侧壁接触。
优选的，所述连接结构包括转动连接在缝纫机壳体上的竖向轴，所述竖向轴上端侧壁设有齿面，所述刀座上设有可转动的轴，轴下端设有与齿面啮合的剪线传动齿轮，轴上端连接动刀，所述竖向轴下端设有摆杆，所述摆杆上铰接有剪线拉杆，所述剪线拉杆端部设有挡块，所述凸轮的最长半径处设有凸轮臂，所述步进电机驱动凸轮臂顶在挡块上，所述剪线拉杆上设有第二拉簧连接在缝纫机壳体上。
优选的，所述凸轮臂上通过连接销连接有轴承，轴承与挡块接触。
优选的，所述凸轮的最短半径处与凸轮摆臂一端接触下，凸轮臂与挡块分离。
优选的，所述凸轮顺时针转动，凸轮与凸轮摆臂接触的位置从最短半径向最长半径移动，挤压凸轮摆臂绕安装座摆动；所述凸轮逆时针转动，凸轮臂与挡块接触，挤压挡块位移，同时，凸轮与凸轮摆臂接触的位置位于最短半径处。
以上技术方案的有益效果是：
在现有的罗拉车上设计了一种一个步进电机同时控制抬压脚及剪线机构，步进剪线抬压脚装置可以实现抬压脚和剪线声音更轻，参数可以可视化精准调节，比如数字化调节压脚高度和剪线时间。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图；
图1是一种缝纫机的步进剪线抬压脚装置结构去壳体示意图；
图2是一种缝纫机的步进剪线抬压脚装置结构加壳体示意图；
图3是步进电机驱动机构示意图；
图4是抬压脚机构示意图；
图5是剪线机构示意图；
图6是一种缝纫机的步进剪线抬压脚装置结构工作原理结构示意图。
1、步进电机；2、电机座；3、凸轮臂；4、凸轮；5、轴承；6、凸轮摆臂；7、安装座；8、第一拉簧；9、拉簧销10、长连杆；11、摆杆；12、横杆；13、摆杆座；14、脚弓连接杠杆；15、沙拉心座组；16、压脚调压旋钮17、弹簧；18、压棒固定座；19、压棒；20、轮前组件；21、定刀；22、抬杆；23、动刀；24、刀座；25、剪线传动齿轮；26、釜轴中套管；27、摆杆28、剪线拉杆；29、竖向轴；30、挡块；31、第二拉簧。
具体实施方式
下面结合附图详细说明本发明的实施方式。
车工在车多种面料，有薄有厚，薄料不需要高压脚高度(影响车工效率)， 厚料压脚高度不够，根据面料需要调节压脚高度，传统调试步骤多且麻烦；每台机器的剪线时间会有差异，需在一定范围内微调，传统调试步骤多且麻烦；因此数字化调节压脚高度以及剪线时间很好的解决了上述问题。
如图1-5，在本实施例一中，一种缝纫机的步进剪线抬压脚装置，该装置主要包含三大机构：抬压脚机构、剪线机构和步进电机驱动机构；
所述步进电机驱动机构，包括步进电机1，所述步进电机1通过电机座2固定连接在缝纫机壳体上；
所述抬压脚机构包括通过连接销转动连接在缝纫机壳体上的沙拉心座组15和可竖向移动的压棒19，所述压棒19上固定套有压棒固定座18，所述压棒固定座18上设有横杆12，所述沙拉心座组15上设有抬杆22，所述抬杆顶在横杆下方，所述压棒固定座18与固定在缝纫机壳体上的压脚调压旋钮之间设有弹簧17，压棒19底端连接轮前组件20，所述步进电机1驱动通过连杆结构拉动所述沙拉心座组15，抬杆22顶起横杆12，压棒19提升；
所述剪线机构，包括固定在缝纫机壳体上的刀座24，所述刀座上设有固定的定刀21和活动的动刀23，动刀23与定刀21接触配合，所述动刀23通过连接结构与步进电机1接触，驱动动刀23转动。
需要说明的是，本实施例中，抬压脚机构与剪线机构通过同一个步进电机控制，但两者分开工作，即抬压脚机构工作时，剪线机构不工作。
本实施例是这样实施的：
本发明在使用时，打开步进电机，顺时针转动，拉动所述沙拉心座组15，抬杆22顶起横杆12，压棒19提升，从而实现抬压脚功能，步进电机回零位，压棒19通过弹簧17挤压，压棒19下移工作；
步进电机逆时针转动，所述动刀23通过连接结构与步进电机1接触，驱动动刀23转动，步进电机回零位的同时通过第二拉簧带动剪线拉杆28回到原位，从而实现剪线功能完成。
实施例二，作为实施例一的优化方案,所述步进电机1的输出轴上连接 凸轮4，所述电机座2上设有拉簧销9，所述拉簧销9连接第一拉簧8；所述连杆结构包括固定在缝纫机壳体上的安装座10和摆杆座13，凸轮摆臂6通过连接销转动连接在安装座10，所述凸轮摆臂6一端通过与第一拉簧8连接，端部紧靠在凸轮4侧壁，另一端与长连杆10底端转动连接，所述长连杆10顶端转动连接摆杆11，所述摆杆11通过连接销转动连接在摆杆座13上，所述沙拉心座组15与摆杆11通过脚弓连接杠杆14连接。
本实施例是这样实施的，通过具体限定的步进电机和连杆结构，打开步进电机，顺时针转动，所述凸轮4顺时针转动，凸轮4与凸轮摆臂6接触的位置从最短半径向最长半径移动，挤压凸轮摆臂6绕安装座7摆动，具体的，凸轮摆臂6一端下压，另一端(即与长连杆10连接段)上移，顶动长连杆10上升，长连杆10顶动摆杆11一端上升，摆杆11绕连接销转动，另一端下移，拉动脚弓连接杠杆14，从而拉动沙拉心座组15，带动抬杆22顶起横杆12，压棒19提升，从而实现抬压脚功能。
实施例三，作为实施例二的优化方案,所述凸轮摆臂6一端的端部通过连接销连接有轴承，第一拉簧8拉动凸轮摆臂6，轴承与凸轮4侧壁接触。
本实施例是这样实施的，通过轴承与凸轮摆臂6的接触，减少摩擦，同时，减小噪音。
实施例四，作为实施例二的优化方案,所述连接结构包括转动连接在缝纫机壳体上的竖向轴29，所述竖向轴29上端侧壁设有齿面26，所述刀座24上设有可转动的轴，轴下端设有与齿面啮合的剪线传动齿轮25，轴上端连接动刀23，所述竖向轴下端设有摆杆27，所述摆杆27上铰接有剪线拉杆28，所述剪线拉杆28端部设有挡块30，所述凸轮4的最长半径处设有凸轮臂6，所述步进电机1驱动凸轮臂6顶在挡块上，所述剪线拉杆28上设有第二拉簧31连接在缝纫机壳体上。
本实施例是这样实施的，通过具体限定的连接结构，打开步进电机，逆时针转动，所述凸轮4逆时针转动，凸轮臂6与挡块30接触，挤压挡块30 位移，挡块拉动剪线拉杆移动，剪线拉杆与摆杆铰接，从而控制竖向轴转动，竖向轴转动的同时，剪线传动齿轮与齿面的啮合，带动轴转动，从而控制动刀旋转，步进电机回零位的同时通过第二拉簧带动剪线拉杆28回到原位，从而实现剪线功能完成；
同时，凸轮4与凸轮摆臂6接触的位置位于最短半径处，抬压脚机构停止工作。
实施例五，作为实施例四的优化方案,所述凸轮臂3上通过连接销连接有轴承5，轴承5与挡块30接触。
本实施例是这样实施的，通过轴承与凸轮臂3的接触，减少摩擦，同时，减小噪音。
实施例六，本发明的工作方法为：
打开步进电机，顺时针转动，所述凸轮4顺时针转动，凸轮4与凸轮摆臂6接触的位置从最短半径向最长半径移动，挤压凸轮摆臂6绕安装座7摆动，具体的，凸轮摆臂6一端下压，另一端(即与长连杆10连接段)上移，顶动长连杆10上升，长连杆10顶动摆杆11一端上升，摆杆11绕连接销转动，另一端下移，拉动脚弓连接杠杆14，从而拉动沙拉心座组15，带动抬杆22顶起横杆12，压棒19提升，从而实现抬压脚功能。
打开步进电机，逆时针转动，所述凸轮4逆时针转动，凸轮臂6与挡块30接触，挤压挡块30位移，挡块拉动剪线拉杆移动，剪线拉杆与摆杆铰接，从而控制竖向轴转动，竖向轴转动的同时，剪线传动齿轮与齿面的啮合，带动轴转动，从而控制动刀旋转，步进电机回零位的同时通过第二拉簧带动剪线拉杆28回到原位，从而实现剪线功能完成。
如图6，电机起始原点位置如图所示；
剪线功能：当步进电机逆时针转动14.66°，带动剪线拉杆28行程10.5mm，剪线拉杆28带动剪线传动齿轮25、动刀23转动,步进电机回零位的同时通过第二拉簧带动剪线拉杆28回到原位，从而实现剪线功能完成；
抬压脚功能：当步进电机顺时针转动100.33°，凸轮臂3带动抬压脚联动机构使沙拉心座组15转动21.27°，抬压脚提升10mm，从而实现抬压脚功能；
通过步进电机控制剪线抬压脚，可以实现数字化参数调节(剪线速度、抬压脚高度)。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims (7)

  1. 一种缝纫机的步进剪线抬压脚装置，其特征在于，该装置主要包含三大机构：抬压脚机构、剪线机构和步进电机驱动机构；
    所述步进电机驱动机构，包括步进电机(1)，所述步进电机(1)通过电机座(2)固定连接在缝纫机壳体上；
    所述抬压脚机构包括通过连接销转动连接在缝纫机壳体上的沙拉心座组(15)和可竖向移动的压棒(19)，所述压棒(19)上固定套有压棒固定座(18)，所述压棒固定座(18)上设有横杆(12)，所述沙拉心座组(15)上设有抬杆(22)，所述抬杆顶在横杆下方，所述压棒固定座(18)与固定在缝纫机壳体上的压脚调压旋钮之间设有弹簧(17)，压棒(19)底端连接轮前组件(20)，所述步进电机(1)驱动通过连杆结构拉动所述沙拉心座组(15)，抬杆(22)顶起横杆(12)，压棒(19)提升；
    所述剪线机构，包括固定在缝纫机壳体上的刀座(24)，所述刀座上设有固定的定刀(21)和活动的动刀(23)，动刀(23)与定刀(21)接触配合，所述动刀(23)通过连接结构与步进电机(1)接触，驱动动刀(23)转动。
  2. 根据权利要求1中所述的一种缝纫机的步进剪线抬压脚装置，其特征在于：所述步进电机(1)的输出轴上连接凸轮(4)，所述电机座(2)上设有拉簧销(9)，所述拉簧销(9)连接第一拉簧(8)；所述连杆结构包括固定在缝纫机壳体上的安装座(10)和摆杆座(13)，凸轮摆臂(6)通过连接销转动连接在安装座(10)，所述凸轮摆臂(6)一端通过与第一拉簧(8)连接，端部紧靠在凸轮(4)侧壁，另一端与长连杆(10)底端转动连接，所述长连杆(10)顶端转动连接摆杆(11)，所述摆杆(11)通过连接销转动连接在摆杆座(13)上，所述沙拉心座组(15)与摆杆(11)通过脚弓连接杠杆(14)连接。
  3. 根据权利要求2中所述的一种缝纫机的步进剪线抬压脚装置，其特征在于：所述凸轮摆臂(6)一端的端部通过连接销连接有轴承，第一拉簧(8) 拉动凸轮摆臂(6)，轴承与凸轮(4)侧壁接触。
  4. 根据权利要求2中所述的一种缝纫机的步进剪线抬压脚装置，其特征在于：所述连接结构包括转动连接在缝纫机壳体上的竖向轴(29)，所述竖向轴(29)上端侧壁设有齿面(26)，所述刀座(24)上设有可转动的轴，轴下端设有与齿面啮合的剪线传动齿轮(25)，轴上端连接动刀(23)，所述竖向轴下端设有摆杆(27)，所述摆杆(27)上铰接有剪线拉杆(28)，所述剪线拉杆(28)端部设有挡块(30)，所述凸轮(4)的最长半径处设有凸轮臂(6)，所述步进电机(1)驱动凸轮臂(6)顶在挡块上，所述剪线拉杆(28)上设有第二拉簧(31)连接在缝纫机壳体上。
  5. 根据权利要求4中所述的一种缝纫机的步进剪线抬压脚装置，其特征在于：所述凸轮臂(3)上通过连接销连接有轴承(5)，轴承(5)与挡块(30)接触。
  6. 根据权利要求5中所述的一种缝纫机的步进剪线抬压脚装置，其特征在于：所述凸轮(4)的最短半径处与凸轮摆臂(6)一端接触下，凸轮臂(6)与挡块(30)分离。
  7. 根据权利要求6中所述的一种缝纫机的步进剪线抬压脚装置，其特征在于：所述凸轮(4)顺时针转动，凸轮(4)与凸轮摆臂(6)接触的位置从最短半径向最长半径移动，挤压凸轮摆臂(6)绕安装座(7)摆动；所述凸轮(4)逆时针转动，凸轮臂(6)与挡块(30)接触，挤压挡块(30)位移，同时，凸轮(4)与凸轮摆臂(6)接触的位置位于最短半径处。
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