WO2020181904A1 - Automatic pressing foot lifting thread-loosening mechanism and sewing machine - Google Patents

Automatic pressing foot lifting thread-loosening mechanism and sewing machine Download PDF

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Publication number
WO2020181904A1
WO2020181904A1 PCT/CN2020/070017 CN2020070017W WO2020181904A1 WO 2020181904 A1 WO2020181904 A1 WO 2020181904A1 CN 2020070017 W CN2020070017 W CN 2020070017W WO 2020181904 A1 WO2020181904 A1 WO 2020181904A1
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WO
WIPO (PCT)
Prior art keywords
presser foot
thread
foot lifting
loosening
lifting
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PCT/CN2020/070017
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French (fr)
Chinese (zh)
Inventor
胡维维
梅晓靖
李家荣
周荆生
陈代银
梅红
向志龙
Original Assignee
浙江翔科缝纫机股份有限公司
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Application filed by 浙江翔科缝纫机股份有限公司 filed Critical 浙江翔科缝纫机股份有限公司
Publication of WO2020181904A1 publication Critical patent/WO2020181904A1/en

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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
    • D05B47/00—Needle-thread tensioning devices; Applications of tensometers
    • D05B47/04—Automatically-controlled tensioning devices

Definitions

  • the utility model belongs to the technical field of sewing equipment, and particularly refers to an automatic presser foot lifting mechanism and a sewing machine.
  • a thread clamp is generally provided on the sewing machine.
  • the function of the thread clamp is that when the sewing machine is working, the thread clamp clamps the suture so that the sewing thread has a proper tightness; when the sewing is finished, the thread clamp cannot be automatically released when the thread is automatically trimmed, so it needs to be set
  • the thread release device controls the thread clamp to automatically release.
  • the sewing machine is also equipped with a presser foot device.
  • the presser foot is pressed above the sewing material when the sewing machine is working, and the action of lifting the presser foot is driven by the presser foot lifting device.
  • the automatic thread loosening mechanism of the sewing machine disclosed in Chinese Patent CN204644631 U includes a linear drive, a swing crank arranged below the linear drive, a thread loosening top plate with an inclined surface, and a thread loosening ejector lever against the inclined surface of the thread loosening top plate.
  • the swing crank is provided with a shaft hole, a top plate shaft is fixedly connected to the shaft hole, and one end of the top plate shaft penetrates And it is fixedly connected to the top plate of the loose wire, the swing crank swings circumferentially around the central axis of the top plate shaft, and the top plate shaft is sleeved with a reset torsion spring acting on the top plate of the loose wire.
  • the linear driver When the electronic control sends out a signal for loosening the thread, the linear driver is energized and the straight rod is pushed down, driving the swing crank to rotate counterclockwise, driving the loose thread top plate to swing synchronously, and the loose thread top rod contacting the loose thread top plate pushes on the slope of the loose thread top plate Move down to the right, the loose thread ejector pin pushes the loose thread nail, and the thread clamp loosens the thread.
  • the straight rod After the power is cut off, the straight rod is reset under the action of the reset spring, the loose thread top plate and the swing crank are reset under the action of the reset torsion spring, the thread clamp is reset under the action of the return spring, and the thread clamp is in a thread clamping state.
  • FIG. 1 Another example is a presser foot lifting mechanism disclosed in Chinese Patent CN 206873066 U, which includes an electromagnet, a crank, a connecting rod, a transmission assembly, and a presser foot assembly.
  • the electromagnet is connected to the presser foot assembly through the crank, the connecting rod and the transmission assembly,
  • the bend of the crank is used for hinged connection with the casing of the sewing machine, characterized in that the upper end of the crank is connected with the connecting rod, the iron core of the electromagnet abuts against the bottom of the lower end of the crank, and the presser foot mechanism is also It includes a knee control jack and a shift lever, one end of the shift lever is connected with the end of the lower end of the crank, the other end of the shift lever is used for hinged connection with the casing of the sewing machine, the top of the knee control jack Articulated with the middle of the lever.
  • the purpose of the utility model is to provide an automatic presser foot lifting mechanism and a sewing machine with compact structure and lower production cost.
  • the utility model is realized as follows:
  • One of the objectives of the utility model is to provide a presser foot lifting and loosening device, which includes a motor, a presser foot assembly, a presser foot assembly, a presser foot lifting cam and a presser foot lifting top plate, and a presser foot lifting cam is provided On the rotating shaft of the motor, a tension spring seat 1 is provided on the end of the presser foot release cam that is away from the motor shaft.
  • the presser foot release top plate includes a bifurcation part 1, a bifurcation part and a bifurcation part 3. , And the middle part of the presser foot release line top plate is rotatably connected to the casing through the presser foot release pin.
  • the outer end of the bifurcation part two is provided with a tension spring seat two, which passes between the tension spring seat one and the tension spring seat two.
  • the tension spring is connected so that the outer cylindrical surface of the tension spring seat 2 is in contact with the outer cylindrical surface of the presser foot release cam.
  • the outer end of the bifurcation part 1 is located under the pressure bar guide of the presser foot assembly, and the bifurcation part 3 The outer end is located on the side of the loose thread auxiliary nail of the loose thread component.
  • the presser foot lifting and releasing cam includes an equal diameter part and a reducing part, and the rotating shaft of the motor and the equal diameter part of the presser foot lifting and releasing cam are arranged coaxially.
  • a torsion spring is sleeved on the presser foot release pin, and the rotating arm at one end of the torsion spring abuts against the second branch and the other end against the lifting
  • the pressure-lifting spring return pin is located on the housing under the top plate of the presser foot loosening line.
  • the presser foot lifting pins on both sides of the torsion spring are respectively provided with circlips for axially limiting the torsion spring.
  • the presser foot assembly includes a presser foot guide frame, the presser foot guide frame is fixed on the presser foot shaft, and a presser foot is fixedly provided at the lower end of the presser foot shaft.
  • the presser foot lifting cam includes a cam portion and a mounting portion.
  • the mounting portion is provided with a rotating shaft mounting hole, and the rotating shaft is inserted into the rotating shaft mounting hole and passes through the radial direction.
  • the set screws are fixedly connected with the mounting part.
  • the bifurcation part three is L-shaped, and the surface that abuts against the auxiliary nail for loosening the thread is an inclined surface.
  • the motor is a stepping motor or a grating motor.
  • Another object of the present invention is to provide a sewing machine, including the above-mentioned presser foot lifting device.
  • the utility model controls the thread loosening action and the presser foot lifting action by a motor, and has a compact structure.
  • the contact connection between the presser foot loosening cam and the tension spring seat drives the presser foot loosening top plate to rotate, and the noise is small, and the production cost is effectively reduced. .
  • Figure 1 is one of the three-dimensional schematic diagrams of the present utility model
  • Figure 2 is the second three-dimensional schematic diagram of the utility model
  • Figure 3 is one of the schematic diagrams of the top plate for lifting the presser foot of the present invention.
  • Figure 4 is the second schematic diagram of the top plate of the utility model for lifting the presser foot and loosening the thread
  • Figure 5 is a schematic diagram of the automatic presser foot lifting mechanism of the present utility model installed on the casing
  • Fig. 6 is an enlarged schematic diagram of part A of Fig. 5;
  • Figure 7 is a schematic diagram of the presser foot lifting cam of the present invention.
  • a presser foot lifting and loosening device includes a motor 1, a presser foot assembly, a presser foot assembly, a presser foot lifting cam 2 and a presser foot loosening top plate 3, wherein the motor 1 is a stepping motor, and It can be a grating motor, etc. In this embodiment, a stepper motor is preferred.
  • the stepping motor is fixed on the casing 10.
  • the presser foot lifting and releasing cam 2 is arranged on the rotating shaft 4 of the motor 1, and the presser foot lifting and releasing cam 2 rotates synchronously with the rotating shaft 4.
  • a tension spring seat 5 is provided on the end of the presser foot lifting and loosening cam 2 away from the rotating shaft 4 of the motor 1.
  • the presser foot lifting and loosening top plate 3 includes a bifurcation portion 6, a bifurcation portion 7 and a bifurcation portion Three 8, the bifurcation section one 6 and the bifurcation section three 8 are respectively located on both sides of the bifurcation section two 7, and the middle part of the top plate 3 of the presser foot release line is rotatably connected to the casing 10 through the presser foot release pin 9 ,
  • the outer end of the bifurcation part two 6 is provided with a tension spring seat two 11, the tension spring seat one 5 and the tension spring seat two 11 are connected by the tension spring 12 so that the outer cylindrical surface of the tension spring seat two 11 and the presser foot are loose
  • the outer cylindrical surface of the line cam 3 is in contact and connected, the outer end of the bifurcated part 7 is located under the pressure bar guide 13 of the presser foot assembly, and the outer end of the bifurcated part 8 is located at the thread loosening auxiliary nail 14 of the loosening assembly One side.
  • the presser foot release pin 9 is sleeved with a torsion spring 17, and the rotating arm at one end of the torsion spring 17 abuts against The other end of the bifurcated portion 7 abuts against the pressure-lifting spring reset pin 18, which is located on the housing 10 under the top plate 3 of the pressure-lifting foot release line.
  • the presser foot lifting pin 9 on both sides of the torsion spring 17 is respectively provided with Circlip 19.
  • the circlip 19 can also be replaced by a circlip or a structure with an annular convex edge on one end and a circlip or circlip on the other end.
  • the circlip 19 is preferred in this embodiment due to the size and processing issues.
  • the presser foot lifting assembly includes a presser foot guide 13, the presser foot guide 13 is fixed on the presser foot shaft 20, and a presser foot 21 is fixedly provided at the lower end of the presser foot shaft 20.
  • the rotating shaft 4 of the motor 1 rotates to drive the bifurcation part 6 to rotate downward (ie, counterclockwise), and the presser foot shaft 20 and the presser foot 21 move downward.
  • the utility model can control the distance between the presser foot 21 and the needle plate when the presser foot 21 is lowered by the rotation angle of the presser foot release cam 3, so as to be suitable for sewing sewing materials of different thicknesses.
  • the presser foot lifting and releasing cam 3 includes a cam portion and a mounting portion.
  • the mounting portion is provided with a rotating shaft mounting hole 22, and the rotating shaft mounting hole 22 of this embodiment is provided through the cam portion.
  • the rotating shaft 4 is inserted in the rotating shaft mounting hole 22, and is fixedly connected to the mounting portion by screws arranged in the radial direction.
  • connection structure between the presser foot lifting cam 3 and the rotating shaft 4 can also be connected by a key connection, such as a spline connection structure.
  • a spline connection structure When the spline connection is adopted, a circlip or a radially arranged screw is also required to limit the position of the presser foot release cam 3 on the rotating shaft 4.
  • the moving direction of the thread loosening auxiliary nail 14 of the utility model is perpendicular to the direction of the presser foot shaft 20.
  • the utility model provides the branching portion three 8 It is L-shaped, that is to say, the branching part three 8 is not on the same plane as the branching part one 6 and the branching part two 7, and the branching part three 8 is closer to the loose thread auxiliary nail 14.
  • the surface that abuts the loose thread auxiliary nail 14 is a slope, and the distance between the upper end of the slope and the front plane of the bifurcation part 7 is greater than the distance between the lower end of the slope and the front plane of the bifurcation part 7 .
  • the thread loosening assembly includes a thread take-up spring adjustment seat 23, a thread loosening auxiliary nail 19, the thread take-up spring adjustment seat 23, and the thread loosening auxiliary nail 19 are installed on the casing 10, and the thread take-up spring adjustment seat 23
  • the thread take-up spring adjustment seat 23 is provided with a fixing installation hole in the axial direction.
  • the front end of the thread take-up spring adjustment seat 23 extends out of the casing 10.
  • the thread take-up spring adjustment seat 23 is provided with a thread clamping piece abutment surface.
  • the front end of 23 is provided with two clamping pieces 24 and a clamping nut 25.
  • a clamping spring 26 is arranged between the clamping piece 24 and the clamping nut 25 to press the clamping piece 24 against the abutting surface of the clamping piece.
  • One end of the thread-releasing nail 27 is set in the thread-releasing nail installation hole and abuts against the thread clamping piece 24 located on the outside, and the other end extends beyond the rear end of the thread take-up spring adjusting seat 23.
  • the thread-releasing auxiliary nail 19 and the thread-releasing nail The axis of the 27 is arranged coaxially or parallel, and the auxiliary nail 19 for the loosening can abut against the auxiliary nail 27, a circlip is provided on the auxiliary nail 19 for the loosening, and a return spring 28 spring is arranged on the outer of the loosening nail 27 , One end of the return spring 28 is pressed against the rear side of the thread take-up spring adjusting seat 23, and the other end is pressed against the circlip.
  • Another object of the present invention is to provide a sewing machine including the above-mentioned thread lifting device for presser foot.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

Disclosed are an automatic pressing foot lifting thread-loosening mechanism and a sewing machine. The pressing foot lifting thread-loosening mechanism comprises a motor (1), a pressing foot assembly, a thread-loosening assembly, a pressing foot lifting thread-loosening cam (2), and a pressing foot lifting thread-loosening top plate (3). The pressing foot lifting thread-loosening cam (2) is arranged on a rotating shaft (4) of the motor (1), a first tension spring base (5) being arranged on the end of the pressing foot lifting thread-loosening cam (2) furthest from the rotating shaft (4) of the motor (1), the pressing foot lifting thread-loosening top plate (3) comprising a first bifurcated part (6), a second bifurcated part (7), and a third bifurcated part (8), the middle of the pressing foot lifting thread-loosening top plate (3) being rotatably connected to a machine shell (10) by means of a pressing foot lifting thread-loosening pin (9), a second tension spring base (11) being arranged on the outer end of the second bifurcated part (7), the first tension spring base (5) and the second tension spring base (11) being connected by means of a tension spring (12) such that the surface of an outer column of the second tension spring base (11) is in contact connection with the surface of an outer column of the pressing foot lifting thread-loosening cam (2), the outer end of the first bifurcated part (6) being positioned below a pressing rod guide bracket (13) of the pressing foot assembly, and the outer end of the third bifurcated part (8) being positioned at one side of a thread-loosening auxiliary nail (14) of the thread-loosening assembly. The thread-loosening and pressing foot lifting action of the automatic pressing foot lifting thread-loosening mechanism is controlled by a motor; the structure is compact, and the pressing foot lifting thread-loosening cam (2) is in contact connection with the second tension spring base (11) to drive the pressing foot lifting thread-loosening top plate (3) to rotate; there is little noise, and production costs are low.

Description

一种自动抬压脚松线机构及缝纫机Automatic presser foot lifting and thread releasing mechanism and sewing machine 技术领域：Technical field:
本实用新型属于缝制设备技术领域，特指一种自动抬压脚松线机构及缝纫机。The utility model belongs to the technical field of sewing equipment, and particularly refers to an automatic presser foot lifting mechanism and a sewing machine.
背景技术：Background technique:
缝纫机上一般都设置有夹线器。夹线器的作用是在缝纫机工作时，夹线器将缝线夹紧，使缝线具有合适的松紧度；当缝纫结束后，自动剪线时，夹线器不能自动松开，则需要设置松线装置控制夹线器自动松开。A thread clamp is generally provided on the sewing machine. The function of the thread clamp is that when the sewing machine is working, the thread clamp clamps the suture so that the sewing thread has a proper tightness; when the sewing is finished, the thread clamp cannot be automatically released when the thread is automatically trimmed, so it needs to be set The thread release device controls the thread clamp to automatically release.
缝纫机上也设置有压脚装置。压脚在缝纫机工作时压设在缝料的上方，抬压脚的动作由抬压脚装置驱动。The sewing machine is also equipped with a presser foot device. The presser foot is pressed above the sewing material when the sewing machine is working, and the action of lifting the presser foot is driven by the presser foot lifting device.
如中国专利CN 204644631 U公开的缝纫机的自动松线机构，包括直线驱动器、设于直线驱动器下方的摆动曲柄、具有斜面的松线顶板和抵靠在松线顶板斜面上的松线顶杆，所述松线顶杆的另一端抵靠在具有复位弹簧的夹线器上，所述的摆动曲柄上具有轴孔，所述的轴孔内固连有顶板轴，所述顶板轴的一端穿设并固连在松线顶板上，所述的摆动曲柄绕顶板轴的中轴线作周向摆动，所述的顶板轴上套设有作用在松线顶板上的复位扭簧。For example, the automatic thread loosening mechanism of the sewing machine disclosed in Chinese Patent CN204644631 U includes a linear drive, a swing crank arranged below the linear drive, a thread loosening top plate with an inclined surface, and a thread loosening ejector lever against the inclined surface of the thread loosening top plate. The other end of the thread-releasing mandrel abuts against a thread clamp with a return spring, the swing crank is provided with a shaft hole, a top plate shaft is fixedly connected to the shaft hole, and one end of the top plate shaft penetrates And it is fixedly connected to the top plate of the loose wire, the swing crank swings circumferentially around the central axis of the top plate shaft, and the top plate shaft is sleeved with a reset torsion spring acting on the top plate of the loose wire.
当电控发出松线信号时，直线驱动器通电，直杆向下推出，带动摆动曲柄逆时针转动，带动松线顶板同步摆动，与松线顶板接触的松线顶杆在松线顶板斜面的推动下向右运动，松线顶杆推动松线钉，夹线器松线。断电后，直杆在复位簧的作用下复位，松线顶板和摆动曲柄在复位扭簧的作用下复位，夹线器在复位弹簧的作用下复位，夹线器处于夹线状态。When the electronic control sends out a signal for loosening the thread, the linear driver is energized and the straight rod is pushed down, driving the swing crank to rotate counterclockwise, driving the loose thread top plate to swing synchronously, and the loose thread top rod contacting the loose thread top plate pushes on the slope of the loose thread top plate Move down to the right, the loose thread ejector pin pushes the loose thread nail, and the thread clamp loosens the thread. After the power is cut off, the straight rod is reset under the action of the reset spring, the loose thread top plate and the swing crank are reset under the action of the reset torsion spring, the thread clamp is reset under the action of the return spring, and the thread clamp is in a thread clamping state.
再如中国专利CN 206873066 U公开的一种抬压脚机构，包括电磁铁、曲柄、连杆、传动组件和压脚组件，所述电磁铁通过曲柄、连杆和传动组件与压脚组件相连，所述曲柄的拐弯处用于与缝纫机的机壳相铰接，其特征在于，所述曲柄的上端与连杆相连，所述电磁铁的铁芯抵靠在曲柄下端的底部，抬压脚机构还包括膝控顶杆和拨杆，所述拨杆的一端与所述曲柄下端的端部相连，所述拨杆的另一端用于与缝纫机的机壳相铰接，所述膝控顶杆的顶部与拨杆的中部相铰接。Another example is a presser foot lifting mechanism disclosed in Chinese Patent CN 206873066 U, which includes an electromagnet, a crank, a connecting rod, a transmission assembly, and a presser foot assembly. The electromagnet is connected to the presser foot assembly through the crank, the connecting rod and the transmission assembly, The bend of the crank is used for hinged connection with the casing of the sewing machine, characterized in that the upper end of the crank is connected with the connecting rod, the iron core of the electromagnet abuts against the bottom of the lower end of the crank, and the presser foot mechanism is also It includes a knee control jack and a shift lever, one end of the shift lever is connected with the end of the lower end of the crank, the other end of the shift lever is used for hinged connection with the casing of the sewing machine, the top of the knee control jack Articulated with the middle of the lever.
从上可知，现有的缝纫机上的松线与抬压脚动作分别由两个独立的驱动器驱动，具有成本高、结构复杂、装配时间长等缺陷。It can be seen from the above that the thread loosening and presser foot lifting actions on the existing sewing machine are respectively driven by two independent drivers, which have disadvantages such as high cost, complex structure, and long assembly time.
发明内容：Summary of the invention:
本实用新型的目的是提供一种结构紧凑、降低生产成本的自动抬压脚松线机构及缝纫机。The purpose of the utility model is to provide an automatic presser foot lifting mechanism and a sewing machine with compact structure and lower production cost.
本实用新型是这样实现的：The utility model is realized as follows:
本实用新型的其中一个目的是提供一种抬压脚松线装置，包括电机、压脚组件、松线组件、抬压脚松线凸轮及抬压脚松线顶板，抬压脚松线凸轮设置在电机的转轴上，在抬压脚松线凸轮上远离电机的转轴的一端设置有拉簧座一，所述抬压脚松线顶板包括分叉部一、分叉部二及分叉部三，且抬压脚松线顶板的中部通过抬压脚松线销转动连接在机壳上，分叉部二的外端设置有拉簧座二，拉簧座一与拉簧座二之间通过拉簧连接使得拉簧座二的外柱面与抬压脚松线凸轮的外柱面接触连接，分叉部一的外端位于压脚组件的压杆导架的下方，分叉部三的外端位于松线组件的松线辅钉的一侧。One of the objectives of the utility model is to provide a presser foot lifting and loosening device, which includes a motor, a presser foot assembly, a presser foot assembly, a presser foot lifting cam and a presser foot lifting top plate, and a presser foot lifting cam is provided On the rotating shaft of the motor, a tension spring seat 1 is provided on the end of the presser foot release cam that is away from the motor shaft. The presser foot release top plate includes a bifurcation part 1, a bifurcation part and a bifurcation part 3. , And the middle part of the presser foot release line top plate is rotatably connected to the casing through the presser foot release pin. The outer end of the bifurcation part two is provided with a tension spring seat two, which passes between the tension spring seat one and the tension spring seat two. The tension spring is connected so that the outer cylindrical surface of the tension spring seat 2 is in contact with the outer cylindrical surface of the presser foot release cam. The outer end of the bifurcation part 1 is located under the pressure bar guide of the presser foot assembly, and the bifurcation part 3 The outer end is located on the side of the loose thread auxiliary nail of the loose thread component.
在上述的一种抬压脚松线装置中，所述抬压脚松线凸轮包括等径部及变径 部，所述电机的转轴与抬压脚松线凸轮的等径部同轴设置。In the above-mentioned presser foot lifting and thread releasing device, the presser foot lifting and releasing cam includes an equal diameter part and a reducing part, and the rotating shaft of the motor and the equal diameter part of the presser foot lifting and releasing cam are arranged coaxially.
在上述的一种抬压脚松线装置中，所述抬压脚松线销上套设有扭簧，扭簧一端的转臂抵靠在分叉部二上、另一端抵靠在抬压弹簧复位销上，所述抬压弹簧复位销位于抬压脚松线顶板下方的机壳上。In the above-mentioned device for lifting and releasing the presser foot, a torsion spring is sleeved on the presser foot release pin, and the rotating arm at one end of the torsion spring abuts against the second branch and the other end against the lifting On the spring return pin, the pressure-lifting spring return pin is located on the housing under the top plate of the presser foot loosening line.
在上述的一种抬压脚松线装置中，所述扭簧两侧的抬压脚松线销上分别设置有对扭簧进行轴向限位的卡簧。In the above-mentioned presser foot lifting device, the presser foot lifting pins on both sides of the torsion spring are respectively provided with circlips for axially limiting the torsion spring.
在上述的一种抬压脚松线装置中，所述抬压脚组件包括压脚导架，压脚导架固设在压脚轴上，在压脚轴的下端固设有压脚。In the above-mentioned presser foot lifting device, the presser foot assembly includes a presser foot guide frame, the presser foot guide frame is fixed on the presser foot shaft, and a presser foot is fixedly provided at the lower end of the presser foot shaft.
在上述的一种抬压脚松线装置中，所述抬压脚松线凸轮包括凸轮部与安装部，安装部上设置有转轴安装孔，转轴插设在转轴安装孔内，并通过径向设置的螺钉与安装部固定连接。In the above-mentioned presser foot lifting device, the presser foot lifting cam includes a cam portion and a mounting portion. The mounting portion is provided with a rotating shaft mounting hole, and the rotating shaft is inserted into the rotating shaft mounting hole and passes through the radial direction. The set screws are fixedly connected with the mounting part.
在上述的一种抬压脚松线装置中，所述分叉部三呈L形，且与松线辅钉抵靠的面为斜面。In the above-mentioned device for lifting and loosening the thread by pressing the foot, the bifurcation part three is L-shaped, and the surface that abuts against the auxiliary nail for loosening the thread is an inclined surface.
在上述的一种抬压脚松线装置中，所述电机为步进电机或光栅电机。In the above-mentioned device for lifting and loosening the presser foot, the motor is a stepping motor or a grating motor.
本实用新型的另一个目的是提供一种缝纫机，包上述的抬压脚松线装置。Another object of the present invention is to provide a sewing machine, including the above-mentioned presser foot lifting device.
本实用新型相比现有技术突出的优点是：The outstanding advantages of the utility model compared with the prior art are:
本实用新型由一个电机控制松线动作与抬压脚动作，结构紧凑，抬压脚松线凸轮与拉簧座二之间接触连接带动抬压脚松线顶板转动，噪音小，有效降低生产成本。The utility model controls the thread loosening action and the presser foot lifting action by a motor, and has a compact structure. The contact connection between the presser foot loosening cam and the tension spring seat drives the presser foot loosening top plate to rotate, and the noise is small, and the production cost is effectively reduced. .
附图说明：Description of the drawings:
图1是本实用新型的立体示意图之一；Figure 1 is one of the three-dimensional schematic diagrams of the present utility model;
图2是本实用新型的立体示意图之二；Figure 2 is the second three-dimensional schematic diagram of the utility model;
图3是本实用新型的抬压脚松线顶板的示意图之一；Figure 3 is one of the schematic diagrams of the top plate for lifting the presser foot of the present invention;
图4是本实用新型的抬压脚松线顶板的示意图之二；Figure 4 is the second schematic diagram of the top plate of the utility model for lifting the presser foot and loosening the thread;
图5是本实用新型的自动抬压脚松线机构安装在机壳上的示意图；Figure 5 is a schematic diagram of the automatic presser foot lifting mechanism of the present utility model installed on the casing;
图6是图5的A部放大示意图；Fig. 6 is an enlarged schematic diagram of part A of Fig. 5;
图7是本实用新型的抬压脚松线凸轮的示意图。Figure 7 is a schematic diagram of the presser foot lifting cam of the present invention.
图中：1、电机；2、抬压脚松线凸轮；3、抬压脚松线顶板；4、转轴；5、拉簧座一；6、分叉部一；7、分叉部二；8、分叉部三；9、抬压脚松线销；10、机壳；11、拉簧座二；12、拉簧；13、压杆导架；14、松线辅钉；15、等径部；16、变径部；17、扭簧；18、抬压弹簧复位销；19、卡簧；20、压脚轴；21、压脚；22、转轴安装孔；23、挑线簧调节座；24、夹线片；25、夹线螺母；26、夹线簧；27、松线钉；28、复位弹簧。In the figure: 1. Motor; 2. Presser foot release cam; 3. Presser foot release top plate; 4. Rotary shaft; 5. Tension spring seat one; 6. Bifurcation part one; 7. Bifurcation part two; 8. Bifurcation part three; 9. Presser foot lifting pin; 10. Case; 11. Tension spring seat two; 12. Tension spring; 13. Press rod guide frame; 14. Loosening auxiliary nail; 15, etc. Diameter part; 16. Diameter reducing part; 17, torsion spring; 18, return pin of lifting and pressing spring; 19, circlip; 20, presser foot shaft; 21, presser foot; 22, shaft mounting hole; 23, thread take-up spring adjustment Seat; 24, clamping piece; 25, clamping nut; 26, clamping spring; 27, loosening nail; 28, return spring.
具体实施方式：detailed description:
下面以具体实施例对本实用新型作进一步描述，参见图1-7：The following further describes the utility model with specific examples, see Figures 1-7:
一种抬压脚松线装置，包括电机1、压脚组件、松线组件、抬压脚松线凸轮2及抬压脚松线顶板3，其中，所述的电机1为步进电机，也可以是光栅电机等。本实施例优选步进电机。步进电机固定在机壳10上。抬压脚松线凸轮2设置在电机1的转轴4上，抬压脚松线凸轮2随转轴4同步转动。在抬压脚松线凸轮2上远离电机1的转轴4的一端设置有拉簧座一5，所述抬压脚松线顶板3包括分叉部一6、分叉部二7及分叉部三8，分叉部一6及分叉部三8分别位于分叉部二7的两侧，且抬压脚松线顶板3的中部通过抬压脚松线销9转动连接在机壳10上，分叉部二6的外端设置有拉簧座二11，拉簧座一5与拉簧座二11之间通过拉簧12连接使得拉簧座二11的外柱面与抬压脚松线凸轮3的外柱面接触 连接，分叉部一7的外端位于压脚组件的压杆导架13的下方，分叉部三8的外端位于松线组件的松线辅钉14的一侧。A presser foot lifting and loosening device includes a motor 1, a presser foot assembly, a presser foot assembly, a presser foot lifting cam 2 and a presser foot loosening top plate 3, wherein the motor 1 is a stepping motor, and It can be a grating motor, etc. In this embodiment, a stepper motor is preferred. The stepping motor is fixed on the casing 10. The presser foot lifting and releasing cam 2 is arranged on the rotating shaft 4 of the motor 1, and the presser foot lifting and releasing cam 2 rotates synchronously with the rotating shaft 4. A tension spring seat 5 is provided on the end of the presser foot lifting and loosening cam 2 away from the rotating shaft 4 of the motor 1. The presser foot lifting and loosening top plate 3 includes a bifurcation portion 6, a bifurcation portion 7 and a bifurcation portion Three 8, the bifurcation section one 6 and the bifurcation section three 8 are respectively located on both sides of the bifurcation section two 7, and the middle part of the top plate 3 of the presser foot release line is rotatably connected to the casing 10 through the presser foot release pin 9 , The outer end of the bifurcation part two 6 is provided with a tension spring seat two 11, the tension spring seat one 5 and the tension spring seat two 11 are connected by the tension spring 12 so that the outer cylindrical surface of the tension spring seat two 11 and the presser foot are loose The outer cylindrical surface of the line cam 3 is in contact and connected, the outer end of the bifurcated part 7 is located under the pressure bar guide 13 of the presser foot assembly, and the outer end of the bifurcated part 8 is located at the thread loosening auxiliary nail 14 of the loosening assembly One side.
进一步地，所述抬压脚松线凸轮2包括等径部15及变径部16，所述电机1的转轴4与抬压脚松线凸轮3的等径部15同轴设置。电机1的转轴4正转或反转带动抬压脚松线顶板3跟随其动作绕抬压脚松线销9反转或正转实现松线或抬压脚的动作。Further, the presser foot lifting and releasing cam 2 includes an equal diameter part 15 and a reducing part 16, and the rotating shaft 4 of the motor 1 is coaxially arranged with the equal diameter part 15 of the presser foot lifting and releasing cam 3. The rotating shaft 4 of the motor 1 rotates clockwise or counterclockwise to drive the presser foot lifting and thread-releasing top plate 3 to follow its action and rotates around the presser foot thread-releasing pin 9 to reverse or forward to realize the thread release or presser foot lifting action.
为了使抬压脚松线凸轮3的外柱面始终与拉簧座二11贴合，所述抬压脚松线销9上套设有扭簧17，扭簧17一端的转臂抵靠在分叉部二7上、另一端抵靠在抬压弹簧复位销18上，所述抬压弹簧复位销18位于抬压脚松线顶板3下方的机壳10上。In order to make the outer cylindrical surface of the presser foot lifter and release cam 3 always fit the tension spring seat two 11, the presser foot release pin 9 is sleeved with a torsion spring 17, and the rotating arm at one end of the torsion spring 17 abuts against The other end of the bifurcated portion 7 abuts against the pressure-lifting spring reset pin 18, which is located on the housing 10 under the top plate 3 of the pressure-lifting foot release line.
为了防止扭簧17在抬压脚松线销9上产生轴向位移，甚至从抬压脚松线销9上脱离，所述扭簧17两侧的抬压脚松线销9上分别设置有卡簧19。卡簧19也可以由挡圈或一端设置有环形凸沿、另一端设置卡簧或挡圈的结构来代替，但是由于考虑到尺寸及加工的问题，本实施例优选卡簧19。In order to prevent the torsion spring 17 from generating axial displacement on the presser foot lifting pin 9 or even detaching from the presser foot lifting pin 9, the presser foot lifting pin 9 on both sides of the torsion spring 17 is respectively provided with Circlip 19. The circlip 19 can also be replaced by a circlip or a structure with an annular convex edge on one end and a circlip or circlip on the other end. However, the circlip 19 is preferred in this embodiment due to the size and processing issues.
进一步地，所述抬压脚组件包括压脚导架13，压脚导架13固设在压脚轴20上，在压脚轴20的下端固设有压脚21。Further, the presser foot lifting assembly includes a presser foot guide 13, the presser foot guide 13 is fixed on the presser foot shaft 20, and a presser foot 21 is fixedly provided at the lower end of the presser foot shaft 20.
抬压脚时，电机1的转轴4转动，带动分叉部一6朝上(即顺时针)转动，带动压脚轴20、压脚21向上抬起。When the presser foot is lifted, the shaft 4 of the motor 1 rotates, driving the bifurcation part 6 to rotate upward (that is, clockwise), driving the presser foot shaft 20 and the presser foot 21 to lift up.
当压脚21需要放下时，电机1的转轴4转动，带动分叉部一6朝下(即逆时针)转动，压脚轴20、压脚21向下移动。When the presser foot 21 needs to be put down, the rotating shaft 4 of the motor 1 rotates to drive the bifurcation part 6 to rotate downward (ie, counterclockwise), and the presser foot shaft 20 and the presser foot 21 move downward.
本实用新型可以通过抬压脚松线凸轮3转动的角度控制压脚21放下时与针板之间的距离，以适用于不同厚度的缝料的缝制。The utility model can control the distance between the presser foot 21 and the needle plate when the presser foot 21 is lowered by the rotation angle of the presser foot release cam 3, so as to be suitable for sewing sewing materials of different thicknesses.
进一步地，所述抬压脚松线凸轮3包括凸轮部与安装部，安装部上设置有转轴安装孔22，本实施例的转轴安装孔22贯穿凸轮部设置。转轴4插设在转轴安装孔22内，并通过径向设置的螺钉与安装部固定连接。Further, the presser foot lifting and releasing cam 3 includes a cam portion and a mounting portion. The mounting portion is provided with a rotating shaft mounting hole 22, and the rotating shaft mounting hole 22 of this embodiment is provided through the cam portion. The rotating shaft 4 is inserted in the rotating shaft mounting hole 22, and is fixedly connected to the mounting portion by screws arranged in the radial direction.
抬压脚松线凸轮3与转轴4之间的连接结构除上述的结构之外，还可以采用键连接的方式连接，常见的如花键连接结构。采用花键连接的时候，还需要设置卡簧或径向设置的螺钉等对抬压脚松线凸轮3在转轴4上的位置进行限位。In addition to the above-mentioned structure, the connection structure between the presser foot lifting cam 3 and the rotating shaft 4 can also be connected by a key connection, such as a spline connection structure. When the spline connection is adopted, a circlip or a radially arranged screw is also required to limit the position of the presser foot release cam 3 on the rotating shaft 4.
本实用新型松线辅钉14的活动方向与压脚轴20的方向垂直，考虑到分叉部三8与松线辅钉14之间的位置关系，本实用新型设置所述分叉部三8呈L形，也就是说分叉部三8与分叉部一6、分叉部二7不在同一个平面上，分叉部三8更靠近松线辅钉14一些。且与松线辅钉14抵靠的面为斜面，且斜面的上端至分叉部二7的前侧平面之间的距离大于斜面的下端至分叉部二7的前侧平面之间的距离。当松线辅钉14抵靠在斜面的上端时，处于松线状态，当松线辅钉14抵靠在斜面的下端时，处于夹线状态。The moving direction of the thread loosening auxiliary nail 14 of the utility model is perpendicular to the direction of the presser foot shaft 20. Taking into account the positional relationship between the branching portion 38 and the thread loosening auxiliary nail 14, the utility model provides the branching portion three 8 It is L-shaped, that is to say, the branching part three 8 is not on the same plane as the branching part one 6 and the branching part two 7, and the branching part three 8 is closer to the loose thread auxiliary nail 14. And the surface that abuts the loose thread auxiliary nail 14 is a slope, and the distance between the upper end of the slope and the front plane of the bifurcation part 7 is greater than the distance between the lower end of the slope and the front plane of the bifurcation part 7 . When the thread loosening auxiliary nail 14 abuts against the upper end of the inclined surface, it is in a thread loosening state, and when the thread loosening auxiliary nail 14 abuts against the lower end of the inclined surface, it is in a thread clamping state.
进一步地，所述松线组件包括挑线簧调节座23、松线辅钉19，挑线簧调节座23、松线辅钉19安装在机壳10上，在挑线簧调节座23内沿其轴向设置有松线定安装孔，挑线簧调节座23的前端部伸出机壳10之外，在挑线簧调节座23上设置有夹线片抵靠面，在挑线簧调节座23的前端设置有两个夹线片24与夹线螺母25，夹线片24与夹线螺母25之间设置有夹线簧26将夹线片24抵靠在夹线片抵靠面上，松线钉27的一端设置在松线钉安装孔内并与位于外侧的夹线片24抵接、另一端伸出挑线簧调节座23的后端之外，松线辅钉19与松线钉27的轴线同轴线或平行设置，且松线辅钉19能抵靠在松线钉27上，在松线辅钉19上设置有卡簧，在松线钉27外套设有复位弹28簧，复位弹簧28的一端顶紧 在挑线簧调节座23的后侧面上、另一端顶紧在卡簧上。当分叉部三8上的斜面作用于松线辅钉19上，随着斜面的倾斜角度的变化，带动松线辅钉19抵靠松线钉27进而顶开位于外侧的夹线片24达到松线的目的。当松线辅钉19在复位弹簧28的作用下复位后，夹线簧26驱动松线钉27复位，两夹线片24重新贴合实现夹线动作。Further, the thread loosening assembly includes a thread take-up spring adjustment seat 23, a thread loosening auxiliary nail 19, the thread take-up spring adjustment seat 23, and the thread loosening auxiliary nail 19 are installed on the casing 10, and the thread take-up spring adjustment seat 23 The thread take-up spring adjustment seat 23 is provided with a fixing installation hole in the axial direction. The front end of the thread take-up spring adjustment seat 23 extends out of the casing 10. The thread take-up spring adjustment seat 23 is provided with a thread clamping piece abutment surface. The front end of 23 is provided with two clamping pieces 24 and a clamping nut 25. A clamping spring 26 is arranged between the clamping piece 24 and the clamping nut 25 to press the clamping piece 24 against the abutting surface of the clamping piece. One end of the thread-releasing nail 27 is set in the thread-releasing nail installation hole and abuts against the thread clamping piece 24 located on the outside, and the other end extends beyond the rear end of the thread take-up spring adjusting seat 23. The thread-releasing auxiliary nail 19 and the thread-releasing nail The axis of the 27 is arranged coaxially or parallel, and the auxiliary nail 19 for the loosening can abut against the auxiliary nail 27, a circlip is provided on the auxiliary nail 19 for the loosening, and a return spring 28 spring is arranged on the outer of the loosening nail 27 , One end of the return spring 28 is pressed against the rear side of the thread take-up spring adjusting seat 23, and the other end is pressed against the circlip. When the inclined surface on the bifurcation part 3 8 acts on the thread-releasing auxiliary nail 19, as the inclination angle of the inclined surface changes, the thread-releasing auxiliary nail 19 is driven to abut against the thread-releasing nail 27 and push out the thread clamping piece 24 located on the outside. The purpose of loosening the thread. When the thread loosening auxiliary nail 19 is reset under the action of the return spring 28, the thread clamping spring 26 drives the thread loosening nail 27 to reset, and the two thread clamping pieces 24 are reattached to realize the thread clamping action.
本实用新型的另一个目的是提供一种缝纫机，包括上述的抬压脚松线装置。Another object of the present invention is to provide a sewing machine including the above-mentioned thread lifting device for presser foot.
上述实施例仅为本实用新型的较佳实施例之一，并非以此限制本实用新型的实施范围，故：凡依本实用新型的形状、结构、原理所做的等效变化，均应涵盖于本实用新型的保护范围之内。The foregoing embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore: all equivalent changes made in accordance with the shape, structure and principle of the present utility model shall be covered Within the protection scope of the utility model.

Claims (9)

  1. 一种抬压脚松线装置，其特征在于：包括电机(1)、压脚组件、松线组件、抬压脚松线凸轮(2)及抬压脚松线顶板(3)，抬压脚松线凸轮(2)设置在电机(1)的转轴(4)上，在抬压脚松线凸轮(2)上远离电机(1)的转轴(4)的一端设置有拉簧座一(5)，所述抬压脚松线顶板(3)包括分叉部一(6)、分叉部二(7)及分叉部三(8)，且抬压脚松线顶板(3)的中部通过抬压脚松线销(9)转动连接在机壳(10)上，分叉部二(7)的外端设置有拉簧座二(11)，拉簧座一(5)与拉簧座二(11)之间通过拉簧(12)连接使得拉簧座二(11)的外柱面与抬压脚松线凸轮(2)的外柱面接触连接，分叉部一(6)的外端位于压脚组件的压杆导架(13)的下方，分叉部三(8)的外端位于松线组件的松线辅钉(14)的一侧。A presser foot lifting and thread releasing device, which is characterized in that it comprises a motor (1), a presser foot assembly, a thread release component, a presser foot lifting cam (2) and a presser foot lifting top plate (3), and the presser foot lifting The thread-releasing cam (2) is arranged on the rotating shaft (4) of the motor (1), and a tension spring seat (5) is arranged on the end of the thread-lifting foot-releasing cam (2) away from the rotating shaft (4) of the motor (1). ), the presser foot lifting top plate (3) includes bifurcation part one (6), bifurcation part two (7) and bifurcation part three (8), and the middle part of the presser foot lifting thread top plate (3) The pin (9) is rotatably connected to the casing (10) by lifting the presser foot. The outer end of the second branch (7) is provided with two extension spring seats (11), one extension spring seat (5) and extension springs The two seats (11) are connected by a tension spring (12) so that the outer cylindrical surface of the tension spring seat two (11) is in contact with the outer cylindrical surface of the presser foot release cam (2), and the bifurcation part one (6) The outer end of the pin is located under the pressure bar guide (13) of the presser foot assembly, and the outer end of the three branching part (8) is located on the side of the thread loosening auxiliary nail (14) of the thread loosening assembly.
  2. 根据权利要求1所述的一种抬压脚松线装置，其特征在于：所述抬压脚松线凸轮(2)包括等径部(15)及变径部(16)，所述电机(1)的转轴(2)与抬压脚松线凸轮(2)的等径部(15)同轴设置。The presser foot lifting and thread releasing device according to claim 1, characterized in that: the presser foot lifting and thread releasing cam (2) includes an equal diameter portion (15) and a reducing diameter portion (16), and the motor ( The rotating shaft (2) of 1) is coaxially arranged with the equal diameter part (15) of the presser foot lifting cam (2).
  3. 根据权利要求1或2所述的一种抬压脚松线装置，其特征在于：所述抬压脚松线销(9)上套设有扭簧(17)，扭簧(17)一端的转臂抵靠在分叉部二(7)上、另一端抵靠在抬压弹簧复位销(18)上，所述抬压弹簧复位销(18)位于抬压脚松线顶板(3)下方的机壳(10)上。The presser foot lifting and loosening device according to claim 1 or 2, characterized in that: the presser foot lifting and loosening pin (9) is sleeved with a torsion spring (17), one end of the torsion spring (17) The rotating arm abuts on the second bifurcation (7), and the other end abuts on the pressure spring return pin (18), the pressure spring return pin (18) is located under the pressure foot release top plate (3) On the housing (10).
  4. 根据权利要求3所述的一种抬压脚松线装置，其特征在于：所述扭簧(12)两侧的抬压脚松线销(9)上分别设置有对扭簧(17)进行轴向限位的卡簧(19)。The presser foot lifting and loosening device according to claim 3, characterized in that: the presser foot lifting and loosening pins (9) on both sides of the torsion spring (12) are respectively provided with a pair of torsion springs (17). Circlip (19) for axial limit.
  5. 根据权利要求1所述的一种抬压脚松线装置，其特征在于：所述抬压脚组件包括压脚导架(13)，压脚导(13)固设在压脚轴(20)上，在压脚轴(20)的下端固设有压脚(21)。The presser foot lifting device according to claim 1, wherein the presser foot lifting assembly includes a presser foot guide (13), and the presser foot guide (13) is fixed on the presser foot shaft (20) On the upper end, a presser foot (21) is fixedly arranged at the lower end of the presser foot shaft (20).
  6. 根据权利要求1所述的一种抬压脚松线装置，其特征在于：所述抬压脚松线凸轮(2)包括凸轮部与安装部，安装部上设置有转轴安装孔(22)，转轴(4)插设在转轴安装孔(22)内，并通过径向设置的螺钉与安装部固定连接。The presser foot lifting and thread releasing device according to claim 1, characterized in that: the presser foot lifting and thread releasing cam (2) comprises a cam part and a mounting part, and the mounting part is provided with a shaft mounting hole (22), The rotating shaft (4) is inserted in the rotating shaft mounting hole (22), and is fixedly connected with the mounting part through radially arranged screws.
  7. 根据权利要求1所述的一种抬压脚松线装置，其特征在于：所述分叉部三(8)呈L形，且与松线辅钉(14)抵靠的面为斜面。The presser foot lifting and thread releasing device according to claim 1, characterized in that the bifurcation part (8) is L-shaped, and the surface abutting against the thread releasing auxiliary nail (14) is an inclined surface.
  8. 根据权利要求1所述的一种抬压脚松线装置，其特征在于：所述电机(1)为步进电机或光栅电机。The presser foot lifting and thread releasing device according to claim 1, wherein the motor (1) is a stepping motor or a grating motor.
  9. 一种缝纫机，其特征在于：包括权利要求1-8任一项所述的抬压脚松线装置。A sewing machine, characterized by comprising the presser foot lifting and thread releasing device according to any one of claims 1-8.
PCT/CN2020/070017 2019-03-11 2020-01-02 Automatic pressing foot lifting thread-loosening mechanism and sewing machine WO2020181904A1 (en)

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CN209722475U (en) * 2019-03-11 2019-12-03 浙江翔科缝纫机股份有限公司 A kind of automatic needle-foot-lifting thread releasing mechanism and sewing machine
CN110983646B (en) * 2019-12-23 2021-11-02 杰克缝纫机股份有限公司 Sewing machine and device for lifting presser foot and adjusting pressure of presser foot when thread is loosened
CN110983645B (en) * 2019-12-23 2021-07-30 杰克缝纫机股份有限公司 Sewing machine and device for adjusting pressure of thread trimming and loosing presser foot of sewing machine
CN110923967B (en) * 2019-12-23 2021-12-14 浙江杰克智能缝制科技有限公司 Sewing machine trimming and thread loosening pressure foot lifting device and sewing machine
CN110983644B (en) * 2019-12-23 2021-07-30 杰克缝纫机股份有限公司 Sewing machine trimming and thread loosening pressure foot lifting and pressure foot pressure adjusting device and sewing machine
CN111350034A (en) * 2020-04-24 2020-06-30 拓卡奔马机电科技有限公司 Sewing machine and thread clamping device thereof
CN113668147B (en) * 2020-05-15 2022-10-18 杰克科技股份有限公司 Sewing machine integrating presser foot lifting and thread tension adjusting
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CN114481463B (en) * 2020-11-11 2023-06-13 杰克科技股份有限公司 Flat seaming machine

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