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WO2018126331A1 - 一种改进自动剪线机构的缝纫机 - Google Patents

一种改进自动剪线机构的缝纫机 Download PDF

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Publication number
WO2018126331A1
WO2018126331A1 PCT/CN2017/000008 CN2017000008W WO2018126331A1 WO 2018126331 A1 WO2018126331 A1 WO 2018126331A1 CN 2017000008 W CN2017000008 W CN 2017000008W WO 2018126331 A1 WO2018126331 A1 WO 2018126331A1
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Prior art keywords
cutter
fixed
blade
drive shaft
sewing
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PCT/CN2017/000008
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English (en)
French (fr)
Inventor
肖修锋
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Individual
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Individual
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Priority to PCT/CN2017/000008 priority Critical patent/WO2018126331A1/zh
Publication of WO2018126331A1 publication Critical patent/WO2018126331A1/zh
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Ceased legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms

Definitions

  • the invention relates to the technical field of industrial sewing machines, and in particular to a sewing machine for improving an automatic thread cutting mechanism.
  • the industrial sewing machine (commonly known as the sewing machine) is provided with a sewing arm protruding above the panel, and the upper part of the sewing arm is provided with a rotary hook seat and a thread cutting device, such as the patent number "ZL200910048135.4", and the patent name is "one.
  • a cutter and a fixed blade are mounted above the rotary bobbin, and the fixed blade is mounted on the left side of the cutter drive shaft, and the cutter is fixed to the cutter by the bracket
  • the right side of the drive shaft drives the cutter to rotate by the cutter drive shaft, so that the cutter can be cut and matched with the fixed blade to realize the trimming function.
  • the object of the present invention is to provide a sewing machine with improved automatic thread cutting mechanism, which has a simple structure, a smaller sewing arm, and is more flexible and convenient for sewing processing.
  • another object of the present invention is to provide a sewing machine with improved automatic thread cutting mechanism.
  • the sweeping cutter has higher structural strength, greater shear force, and smoother and more stable thread cutting action. Reliable, the thread trimming is more versatile.
  • a sewing machine for improving an automatic thread cutting mechanism comprises a sewing arm protruding above a needle car panel, a fixed sewing cover is fixed on a left upper part of the sewing arm, and a sweeping cutter is arranged in the sewing arm, the vehicle is provided
  • the outward side of the arm is set to the left side, and the inside of the sewing arm is respectively rotatably mounted with a rotary drive shaft and a cutter drive shaft.
  • the cutter drive shaft is set on the outer edge of the rotary drive shaft, and the rotary drive shaft
  • the top of the top is provided with a rotary hook seat for placing the rotary hook
  • the top panel of the fixed sewing cover is a needle plate, and the bottom surface of the needle plate is fixed with a fixed blade
  • the movable space of the cutter is arranged below the needle plate, and the movable space of the cutter is located
  • the sweeping cutter is fixed to the cutter drive shaft, the sweeping cutter is disposed in the cutter movable space, and the upper portion of the sweeping cutter is provided with the cutter body
  • the sweeping cutter moves back and forth in the movable space of the cutter below the fixed sewing cover, and the cutter body of the sweeping cutter is cut-fitted with the fixed blade.
  • the sewing machine is provided with a rotary hook drive mechanism and a driving mechanism for driving the cutter drive shaft at a fixed angle reciprocating rotary cutter, and the rotary hook drive mechanism is connected to the rotary hook drive shaft, and the cutter drive mechanism Connecting the cutter drive shaft, the cutter drive shaft drives the sweeping cutter to reciprocate once along the arc path in the movable space of the cutter during a trimming process;
  • the bottom surface of the needle plate has an arc groove.
  • the fixed blade is fixed in the arc groove, and the fixed blade is located at one end of the arc groove. In the initial state, the fixed blade and the cutter body are respectively located at two ends of the arc groove, and the cutter body is in the arc groove when the wire is trimmed Move along the curved path toward the stationary blade and shear fit with the stationary blade.
  • the needle plate is provided with a lower pinhole, the lower pinhole penetrating downwardly through the arcuate groove, and the lower pinhole is located at a middle position of the arcuate groove; in the initial state, the blade body and Solid The fixed blades are respectively located at two sides below the lower pinhole; when the blade body and the fixed blade are shear-fitted, the blade body and the fixed blade are overlapped in the arc groove; the right upper part of the sewing arm is coupled with a turnable The movable sewing cover opened or removed, the fixed sewing cover and the movable sewing cover are assembled to cover the upper part of the sewing arm; the cutter driving shaft is disposed at a position right below the fixed sewing cover.
  • the sweeping cutter comprises a fixed portion, a support plate and the cutter body, and the top of the fixed portion is bent upward to extend out of the support plate, and the upper end portion of the support plate faces the inner side. The direction is laterally bent out of the cutter body;
  • the cutter drive shaft is fixed with a jacket, and the fixing portion is fixed to the jacket.
  • the cutter body reciprocates in an annular region of the outer edge of the cutter drive shaft.
  • one end of the cutter body facing the fixed blade is a front end portion, and a front end portion of the cutter body is formed with an inclined or curved oblique hook line portion, and a top surface of the cutter body is provided with a crimping groove and a pressing line.
  • the outer end portion of the groove extends outwardly and penetrates to the oblique hook line portion for hooking the line to be cut during the process of sweeping the fixed blade, and the inner end portion of the pressure line groove is provided with a trimming matching hole
  • the trimming fit hole penetrates the cutter body, and the top edge of the trimming fit hole is disposed as a cutting edge, and the fixed blade is formed with a shearing portion, a shearing portion and a shearing portion toward a bottom edge of one side of the cutter body Cutting edge cut fit.
  • a crimping piece is disposed in the arcuate groove, and the crimping piece is fixed under the fixed blade, and a pressing piece elastic piece is bent downward in the middle of the pressing piece, and the cutting body and the fixed body are fixed.
  • the end portion of the pressing elastic piece elastically abuts against the crimping groove for pressing the wire to be cut against the groove bottom of the crimping groove.
  • the side of the oblique hook line portion facing the cutter drive shaft is an inner portion
  • the side connected to the support plate is an outer portion
  • the inner portion of the oblique hook line portion is formed as A pointed portion
  • an outer portion of the oblique hook line portion is formed with an arc-shaped retaining wire portion, and the tip portion protrudes forward.
  • the upper and lower ends of the curved retaining wire portion respectively penetrate the cutter body
  • the first side of the curved retaining line portion is tangent to the oblique hook line portion
  • the second side is tangent to the support plate
  • the shearing portion protrudes at the bottom edge of the cutter body, and the shearing portion faces the knife
  • the end surface of the body is a vertical plane
  • the bottom surface of the shearing portion is a curved surface.
  • the support plate is a curved panel, and the curved panel has a curved concave surface, the curved concave surface of the support plate faces the cutter drive shaft, and the cutter body is located at the top of the curved concave surface of the support plate.
  • a side of the support plate facing away from the fixed blade is provided with a wing plate, and the wing plate is an arc-shaped panel extending outward from the rear end portion of the blade body, and the top of the wing plate
  • the top surface of the blade is flush with the top surface of the blade body; the inner surface of the wing plate is formed with a concave and convex portion, and the thickness of the lower portion of the extension plate is greater than the thickness of the upper portion.
  • the invention Compared with the prior art, the invention has the advantages that the structure of the invention is simple, the volume of the sewing arm is smaller, and the sewing process is more flexible and convenient.
  • the sweeping cutter of the present invention has higher structural strength, greater shearing force, smoother, more stable and reliable thread cutting action, and more stringent trimming.
  • Figure 1 is a schematic view of the structure of the present invention.
  • Figure 2 is a schematic view showing the structure of another aspect of the present invention.
  • Fig. 3 is a schematic view showing the structure of the sweeping cutter and the fixed blade of the present invention in an initial state.
  • Fig. 4 is a schematic view showing the structure of the sweeping cutter of the present invention when it is swept toward the fixed blade.
  • Fig. 5 is a schematic view showing the structure of a sweeping cutter of the present invention.
  • Figure 6 is a plan view of a sweeping cutter of the present invention.
  • Sweeping cutter 10 cutting edge 11, cutter body 12, fixing portion 13, support plate 14, installation The hole 15, the oblique hook line portion 16, the crimping groove 17, the trimming fitting hole 18, the curved retaining wire portion 19, and the flap.
  • a sewing machine for improving an automatic thread cutting mechanism includes a sewing arm protruding from a needle car panel, and a sweeping cutter 1 is disposed in the sewing arm, and the upper left side of the sewing arm
  • a fixed sewing cover 3 is fixed to the fixed part, and the outward side of the sewing arm is set to the left side, and the inside of the sewing arm is respectively rotatably mounted with the rotary drive shaft 5 and the cutter drive shaft 2, and the cutter drive shaft 2 is set.
  • the cutter drive shaft 2 is mounted coaxially with the rotary shuttle drive shaft 5, and the cutter drive shaft 2 and the shuttle drive shaft 5 do not interfere with each other, and each rotates independently.
  • the sewing arm is fixed in a plurality of bearing seats, and the cutter driving shaft 2 and the hook driving shaft 5 are respectively rotatably mounted on the corresponding bearing seats, and the outer edge of the cutter driving shaft 2 is further mounted with a fixed shaft and/or a protective sleeve.
  • the top of the rotary drive shaft 5 is provided with a rotary hook seat for placing the rotary hook, and the right upper upper portion of the sewing arm is fastened with a movable sewing cover which can be opened or removed, and the fixed sewing cover 3 and the movable sewing cover are left and right.
  • the upper part of the sewing arm is assembled and assembled; the cutter driving shaft 2 is disposed at a position right below the fixed sewing cover 3.
  • the slat arm, the hook support and the movable sewn cover are not shown.
  • the sewing machine is provided with a rotary hook drive mechanism and a driving mechanism for driving the cutter drive shaft 2 at a fixed angle reciprocating rotary cutter, the rotary hook drive mechanism is connected with the rotary drive shaft 5, and the cutter drive mechanism is connected to the cutter drive shaft 2, and the cutter drive The mechanism connects the lower end of the cutter drive shaft 2.
  • the cutter drive mechanism can be electromagnetically driven
  • the mechanism or the motor drive mechanism may also be a drive mechanism that is driven and connected by the transmission mechanism of the sewing machine, as long as the function of driving the cutter drive shaft 2 to rotate at a fixed angle and reciprocating once during the trimming is realized, that is, in one trimming process
  • the cutter drive shaft 2 drives the sweeping cutter 1 to swipe back and forth along the curved path in the cutter movable space.
  • the hook drive mechanism and the cutter drive mechanism are not shown.
  • the top panel of the fixed sewing cover 3 has a needle plate 33, and the bottom surface of the needle plate 33 is fixed with a fixed blade 4; under the needle plate 33, a cutter movable space is arranged, and the movable space of the cutter is located at the fixed sewing cover 3
  • the sweeping cutter 1 is fixed to the cutter drive shaft 2
  • the sweeping cutter 1 is disposed in the cutter movable space, and the upper portion of the sweeping cutter 1 is provided with the cutter body 11; in a trimming process, the sweeping cutter 1 moves back and forth once in the cutter movable space below the fixed sewing cover 3, and the cutter body 11 of the sweeping cutter 1 is shear-fitted with the fixed blade 4.
  • the invention changes the sweeping cutter 1 from the right side of the cutter drive shaft 2 to the left side of the cutter drive shaft 2, further reducing the volume of the sewing arm, and the head of the sewing arm is smaller in size.
  • the toe provided on the sewing arm has more turning space, and the toe can be rotated more flexibly during sewing without being disturbed and blocked by the sewing arm, so that the quality can be sewn and the processing efficiency can be improved.
  • the bottom surface of the needle plate 33 defines an arcuate groove 32.
  • the fixed blade 4 is fixed in the arcuate groove 32.
  • the fixed blade 4 is located at one end of the arcuate groove 32.
  • the fixed blade 4 and the blade body 11 are respectively located in an arc shape.
  • the cutter body 11 moves in the arcuate groove 32 along the curved path toward the fixed blade 4 and is shear-fitted with the fixed blade 4 at the time of thread trimming.
  • the needle plate 33 is provided with a lower pinhole 31 which penetrates the arcuate groove 32 downwardly, and the lower pinhole 31 is located at a middle position of the arcuate groove 32; in the initial state, the blade body 11 and the fixed blade 4 are respectively located The two sides below the lower pinhole 31; when the blade body 11 is shear-fitted with the fixed blade 4, the blade body 11 and the fixed blade 4 are vertically overlapped in the arcuate groove 32.
  • the sweeping cutter 1 includes a fixed portion 12 integrally coupled to the support plate 13 and the blade body 11.
  • the top of the fixing portion 12 is bent upward to extend out of the support plate 13, and the upper end portion of the support plate 13 is oriented inwardly
  • the cutter body 11 is bent out; the cutter drive shaft 2 is fixed by a screw to the jacket 21, and the fixing portion 12 is fixed to the jacket 21 by screwing.
  • the cutter drive shaft 2 rotates back and forth, the cutter body 11 is in the cutter.
  • the circular motion of the outer edge of the drive shaft 2 reciprocates.
  • the volume of the entire sweeping cutter 1 is made smaller, the sweeping cutter 1 is more compact, and the sweeping cutter 1 is located in the annular region of the outer edge of the cutter drive shaft 2, following the cutter drive shaft 2 rotation. , to achieve the trimming action.
  • One end of the blade body 11 facing the fixed blade 4 is a front end portion, and a front end portion of the blade body 11 is formed with an inclined or curved oblique hook line portion 15.
  • the top surface of the blade body 11 defines a crimping groove 16 and a crimping groove 16
  • the outer end portion extends outwardly and penetrates the oblique hook line portion 15 for hooking the line to be cut during the sweeping of the fixed blade 4, and the inner end portion of the crimping groove 16 is provided with a trimming line.
  • the trimming matching hole 17 penetrates the blade body 11, the top edge of the wire trimming hole 17 is provided as a cutting edge 10, and the cutting edge of the fixed blade 4 toward the side of the blade body 11 is formed with a cutting portion 41.
  • the shearing portion 41 is shear-fitted with the cutting edge 10.
  • the specially designed cutter body 11 has a smaller shape, a larger shear force, and can improve the stability and reliability of the trimming action, and the trimming line is more versatile.
  • a crimping piece 6 is disposed in the arcuate groove 32.
  • the crimping piece 6 is fixed under the fixed blade 4.
  • the middle part of the crimping piece 6 is bent downwardly to form a pressing wire elastic piece 61, and the cutting body 11 and the fixed blade 4 are cut and matched.
  • the end portion of the press-line elastic piece 61 elastically abuts against the crimping groove 16 for pressing the wire to be cut on the bottom of the groove of the crimping groove 16, and pressing the wire during trimming to improve the stability of the trimming line. And can keep the thread head a certain margin.
  • the side of the oblique hook line portion 15 facing the cutter drive shaft 2 is an inner portion
  • the side connected to the support plate 13 is an outer portion
  • the inner portion of the oblique hook line portion 15 is formed as a tip portion
  • a diagonal hook line The outer portion of the portion 15 is formed with an arcuate retaining wire portion 18, the tip portion of which protrudes forward.
  • the upper and lower ends of the curved retaining wire portion 18 respectively penetrate the upper and lower surfaces of the cutter body 11, the first side of the curved retaining wire portion 18 is tangent to the oblique hook line portion 15, and the second side is tangent to the support plate 13;
  • the cut portion 41 protrudes from the bottom edge of the cutter body 11, the shearing portion 41 faces the end surface of the cutter body 11 as a vertical plane, and the bottom surface of the shearing portion 41 is a curved surface, which has an automatic sharpening function.
  • the shearing portion 41 is kept in a sharp state for a long period of time.
  • the support plate 13 is an arcuate panel having an arcuate concave surface, the arcuate concave surface of the support plate 13 is directed toward the cutter drive shaft 2, and the cutter body 11 is located at the top of the arcuate concave surface of the support plate 13.
  • a side of the support plate 13 facing away from the fixed blade 4 is provided with a wing plate 19 which is an arc-shaped panel extending outward from the rear end portion of the blade body 11, the top of the wing plate 19 and the top of the blade body 11.
  • the surface is flush; the inner surface of the flap 19 is formed with a concave-convex portion, and the thickness of the lower portion of the extension plate is greater than the thickness of the upper portion.
  • the specially designed wing plate 19 can effectively improve the structural strength of the sweeping cutter 1 while avoiding the shaking or shaking of the sweeping cutter 1 during the sweeping process and the trimming process, thereby improving the stability and reliability of the trimming process. Sex.

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

Abstract

一种改进自动剪线机构的缝纫机，车缝臂向外的一侧设定为左侧，车缝臂的内部分别旋转安装有旋梭传动轴（5）和切刀驱动轴（2），切刀驱动轴（2）套装在旋梭传动轴（5）的外缘，旋梭传动轴（5）的顶部设置有用于放置旋梭的旋梭座，固定车缝盖（3）的顶面板为有针板（33），针板（33）的底面固定有固定刀片（4）；针板（33）的下方设置有切刀活动空间，切刀活动空间位于固定车缝盖（3）的侧壁和切刀驱动轴（2）之间；扫切式切刀（1）固定于切刀驱动轴（2），扫切式切刀（1）设置于切刀活动空间，扫切式切刀（1）的上部设置有刀体（11）；在一次剪线过程中扫切式切刀（1）在固定车缝盖（3）下方的切刀活动空间来回移动一次，扫切式切刀（1）的刀体（11）与固定刀片（4）剪切配合，结构简单，车缝臂的体积更小，进行缝制加工时更加灵活和方便，扫切式切刀（1）具有更高的结构强度，剪切力更大，剪线动作更加顺畅、稳定和可靠，剪线更加利索。

Description

一种改进自动剪线机构的缝纫机 技术领域
本发明涉及工业缝纫机技术领域，尤其是涉及一种改进自动剪线机构的缝纫机。
背景技术
工业缝纫机(俗称针车)设置有一凸出在面板之上的车缝臂，车缝臂的上部设置有旋梭座和剪线装置，如专利号为“ZL200910048135.4”、专利名称为“一种缝纫机的自动剪线装置”的中国发明专利所示，在旋梭座的上方安装有切刀和固定刀片，固定刀片安装在切刀驱动轴的左侧，切刀是通过支架固定在切刀驱动轴的右侧位置，通过切刀驱动轴带动切刀旋转，使切刀与固定刀片剪切配合，从而实现剪线功能。现有技术的切刀的结构设计不合理，经常出现无法将线切断的现象，剪线动作不够稳定和可靠。另外，由于切刀及支架是凸出在切刀驱动轴的右侧，为了将切刀及支架收容在车缝臂内，车缝臂的右侧需要增大，因此车缝臂的整体体积偏大。在缝制鞋头时，需要将鞋头套在车缝臂之上，而鞋头等的内部空间很小，鞋头的转动空间很小，缝制鞋头非常困难，经常受到车缝臂的干扰和阻挡，影响缝制质量，降低加工效率，因此有必要给予改进。
发明内容
针对现有技术存在的不足，本发明的目的是提供一种改进自动剪线机构的缝纫机，它结构简单，车缝臂的体积更小，进行缝制加工时更加灵活和方便。
针对现有技术存在的不足，本发明的另一目的是提供一种改进自动剪线机构的缝纫机，扫切式切刀结构强度更高，剪切力更大，剪线动作更加顺畅、稳定和可靠，剪线更加利索。
为了实现上述目的，本发明所采用的技术方案是。
一种改进自动剪线机构的缝纫机，包括凸出在针车面板之上的车缝臂，车缝臂的左上部固定有一固定车缝盖，车缝臂内设置有扫切式切刀，车缝臂向外的一侧设定为左侧，车缝臂的内部分别旋转安装有旋梭传动轴和切刀驱动轴，切刀驱动轴套装在旋梭传动轴的外缘，旋梭传动轴的顶部设置有用于放置旋梭的旋梭座，固定车缝盖的顶面板为有针板，针板的底面固定有固定刀片；针板的下方设置有切刀活动空间，切刀活动空间位于固定车缝盖的侧壁和切刀驱动轴之间；扫切式切刀固定于切刀驱动轴，扫切式切刀设置于切刀活动空间，扫切式切刀的上部设置有刀体；在一次剪线过程中扫切式切刀在固定车缝盖下方的切刀活动空间来回移动一次，扫切式切刀的刀体与固定刀片剪切配合。
进一步的技术方案中，所述缝纫机设置有旋梭传动机构和用于驱动所述切刀驱动轴定角度往复旋转切刀驱动机构，旋梭传动机构连接所述旋梭传动轴，切刀驱动机构连接切刀驱动轴，在一次剪线过程中切刀驱动轴带动扫切式切刀在所述切刀活动空间沿弧形路径往复扫动一次；所述针板的底面开设有一弧形槽，所述固定刀片固定于弧形槽中，固定刀片位于弧形槽的一端，在初始状态下，固定刀片和刀体分别位于弧形槽的两端，在剪线时刀体在弧形槽内沿弧形路径向固定刀片移动并与固定刀片剪切配合。
进一步的技术方案中，所述针板开设有一下针孔，下针孔向下穿透所述弧形槽，下针孔位于弧形槽的中部位置；在初始状态时，所述刀体和所述固 定刀片分别位于下针孔下方的两侧位置；在刀体与固定刀片剪切配合时，刀体与固定刀片上下重叠于弧形槽中；所述车缝臂的右上部卡接有一能翻开或取下的活动车缝盖，固定车缝盖和活动车缝盖左右拼合并包覆车缝臂的上部；切刀驱动轴设置在固定车缝盖下方偏右的位置。
进一步的技术方案中，所述扫切式切刀包括连结成一体的固定部、支撑板和所述刀体，固定部的顶部向上折弯延伸出所述支撑板，支撑板的上端部朝向内侧方向横向折弯出所述刀体；
所述切刀驱动轴固定有夹套，固定部固定于夹套，切刀驱动轴来回旋转时刀体在切刀驱动轴外缘的圆环形区域中往复行走。
进一步的技术方案中，所述刀体朝向固定刀片的一端为前端部，刀体的前端部成型有倾斜或弧形的斜向勾线部，刀体的顶面开设有一压线槽，压线槽的外端部向外延伸并穿透到斜向勾线部，用于在扫向固定刀片的的过程中勾住待剪切的线，压线槽的内端部开设有一剪线配合孔，剪线配合孔穿透刀体，剪线配合孔的顶部边缘设置成一剪切刃口，所述固定刀片朝向所述刀体的一侧的底部边缘成型有剪切部，剪切部与剪切刃口剪切配合。
进一步的技术方案中，所述弧形槽中设置有压线片，压线片固定于所述固定刀片下方，压线片中部向下折弯出一压线弹片，在所述刀体与固定刀片剪切配合时压线弹片的端部弹性抵顶于所述压线槽，用于将待剪切的线压住在压线槽的槽底。
进一步的技术方案中，所述斜向勾线部朝向所述切刀驱动轴的一侧为内侧部、连接于所述支撑板的一侧为外侧部，斜向勾线部的内侧部成型为一尖部，斜向勾线部的外侧部成型有一弧形挡线部，尖部凸出在前。
进一步的技术方案中，所述弧形挡线部的上下两端分别穿透所述刀体的 上下两面，弧形挡线部第一侧与斜向勾线部相切、第二侧与所述支撑板相切；所述剪切部凸出在刀体的底部边缘，剪切部朝向刀体的端面为垂直平面，剪切部的底面为弧形面。
进一步的技术方案中，所述支撑板为弧形面板，弧形面板具有弧形凹面，支撑板的弧形凹面朝向所述切刀驱动轴，刀体位于支撑板的弧形凹面的顶部。
进一步的技术方案中，所述支撑板背向所述固定刀片的一侧设置有一翼板，翼板是从所述刀体的后端部向外侧延伸而成的弧形面板，翼板的顶部与所述刀体的顶面齐平；所述翼板的内表面成型有凹凸部，延伸板下部的厚度大于上部的厚度。
本发明和现有技术相比所具有的优点是：本发明结构简单，车缝臂的体积更小，进行缝制加工时更加灵活和方便。
另外，本发明的扫切式切刀具有更高的结构强度，剪切力更大，剪线动作更加顺畅、稳定和可靠，剪线更加利索。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明的结构示意图。
图2是本发明的另一视角的结构示意图。
图3是本发明的扫切式切刀与固定刀片处于初始状态时的结构示意图。
图4是本发明的扫切式切刀扫向固定刀片时的结构示意图。
图5是本发明的扫切式切刀的结构示意图。
图6是本发明的扫切式切刀的俯视图。
图中：
1、扫切式切刀10、剪切刃口11、刀体12、固定部13、支撑板14、安装 孔15、斜向勾线部16、压线槽17、剪线配合孔18、弧形挡线部19、翼板。
2、切刀驱动轴21、夹套。
3、固定车缝盖31、下针孔32、弧形槽33、针板。
4、固定刀片41、剪切部。
5、旋梭传动轴。
6、压线片61、压线弹片。
具体实施方式
以下所述仅为本发明的较佳实施例，并不因此而限定本发明的保护范围。
一种改进自动剪线机构的缝纫机，见图1至6所示，包括凸出在针车面板之上的车缝臂，车缝臂内设置有扫切式切刀1，车缝臂的左上部固定有一固定车缝盖3，车缝臂向外的一侧设定为左侧，车缝臂的内部分别旋转安装有旋梭传动轴5和切刀驱动轴2，切刀驱动轴2套装在旋梭传动轴5的外缘，切刀驱动轴2与旋梭传动轴5同轴安装，切刀驱动轴2与旋梭传动轴5互不干扰，各自独立旋转。车缝臂内固定在若干轴承座，切刀驱动轴2与旋梭传动轴5分别旋转安装于相应的轴承座，切刀驱动轴2的外缘还安装有固定轴和/或保护套。旋梭传动轴5的顶部设置有用于放置旋梭的旋梭座，车缝臂的右上部卡接有一能翻开或取下的活动车缝盖，固定车缝盖3和活动车缝盖左右拼合并包覆车缝臂的上部；切刀驱动轴2设置在固定车缝盖3下方偏右的位置。为了更好地展示本发明的创新结构，图中未画出车缝臂、旋梭座和活动车缝盖。
缝纫机设置有旋梭传动机构和用于驱动切刀驱动轴2定角度往复旋转切刀驱动机构，旋梭传动机构连接旋梭传动轴5，切刀驱动机构连接切刀驱动轴2，切刀驱动机构连接切刀驱动轴2的下端部。切刀驱动机构可以是电磁驱动 机构或电机驱动机构，也可以是由缝纫机的传动机构传动连接过来的驱动机构，只要实现在剪线时驱动切刀驱动轴2定角度往复旋转一次的功能即可，即在一次剪线过程中切刀驱动轴2带动扫切式切刀1在切刀活动空间沿弧形路径往复扫动一次。图中未画出旋梭传动机构和切刀驱动机构。
其中，固定车缝盖3的顶面板为有针板33，针板33的底面固定有固定刀片4；针板33的下方设置有切刀活动空间，切刀活动空间位于固定车缝盖3的侧壁和切刀驱动轴2之间；扫切式切刀1固定于切刀驱动轴2，扫切式切刀1设置于切刀活动空间，扫切式切刀1的上部设置有刀体11；在一次剪线过程中扫切式切刀1在固定车缝盖3下方的切刀活动空间来回移动一次，扫切式切刀1的刀体11与固定刀片4剪切配合。
本发明将扫切式切刀1从切刀驱动轴2的右侧改到切刀驱动轴2的左侧，进一步缩小车缝臂的体积，车缝臂的头部的体积更小，为套设在车缝臂的鞋头具有更多的转动空间，在缝纫时鞋头可以更加灵活地转动，不会受到车缝臂的干扰和阻挡，因此，可以缝制质量，提高加工效率。
针板33的底面开设有一弧形槽32，固定刀片4固定于弧形槽32中，固定刀片4位于弧形槽32的一端，在初始状态下，固定刀片4和刀体11分别位于弧形槽32的两端，在剪线时刀体11在弧形槽32内沿弧形路径向固定刀片4移动并与固定刀片4剪切配合。针板33开设有一下针孔31，下针孔31向下穿透弧形槽32，下针孔31位于弧形槽32的中部位置；在初始状态时，刀体11和固定刀片4分别位于下针孔31下方的两侧位置；在刀体11与固定刀片4剪切配合时，刀体11与固定刀片4上下重叠于弧形槽32中。
扫切式切刀1包括连结成一体的固定部12、支撑板13和刀体11，固定部12的顶部向上折弯延伸出支撑板13，支撑板13的上端部朝向内侧方向横 向折弯出刀体11；切刀驱动轴2通过螺丝锁紧固定有一夹套21，固定部12通过螺丝锁紧固定于夹套21，切刀驱动轴2来回旋转时刀体11在切刀驱动轴2外缘的圆环形区域中往复行走。使整个扫切式切刀1的体积变得更小，扫切式切刀1更加小巧，扫切式切刀1位于切刀驱动轴2外缘的环形区域中，跟随切刀驱动轴2旋转，实现剪线动作。
刀体11朝向固定刀片4的一端为前端部，刀体11的前端部成型有倾斜或弧形的斜向勾线部15，刀体11的顶面开设有一压线槽16，压线槽16的外端部向外延伸并穿透到斜向勾线部15，用于在扫向固定刀片的4的过程中勾住待剪切的线，压线槽16的内端部开设有一剪线配合孔17，剪线配合孔17穿透刀体11，剪线配合孔17的顶部边缘设置成一剪切刃口10，固定刀片4朝向刀体11的一侧的底部边缘成型有剪切部41，剪切部41与剪切刃口10剪切配合。特别设计的刀体11形状，体积更小，剪切力更大，且能提高剪线动作的稳定性和可靠性，剪线更加利索。
弧形槽32中设置有压线片6，压线片6固定于固定刀片4下方，压线片6中部向下折弯出一压线弹片61，在刀体11与固定刀片4剪切配合时压线弹片61的端部弹性抵顶于压线槽16，用于将待剪切的线压住在压线槽16的槽底，在剪线时将线压住，提高剪线稳定性，且可以使线头保持一定的余量。
斜向勾线部15朝向切刀驱动轴2的一侧为内侧部、连接于支撑板13的一侧为外侧部，斜向勾线部15的内侧部成型为一尖部，斜向勾线部15的外侧部成型有一弧形挡线部18，尖部凸出在前。弧形挡线部18的上下两端分别穿透刀体11的上下两面，弧形挡线部18第一侧与斜向勾线部15相切、第二侧与支撑板13相切；剪切部41凸出在刀体11的底部边缘，剪切部41朝向刀体11的端面为垂直平面，剪切部41的底面为弧形面，具有自动磨刃功能， 使剪切部41长期保持锋利状态。
支撑板13为弧形面板，弧形面板具有弧形凹面，支撑板13的弧形凹面朝向切刀驱动轴2，刀体11位于支撑板13的弧形凹面的顶部。支撑板13背向固定刀片4的一侧设置有一翼板19，翼板19是从刀体11的后端部向外侧延伸而成的弧形面板，翼板19的顶部与刀体11的顶面齐平；翼板19的内表面成型有凹凸部，延伸板下部的厚度大于上部的厚度。特别设计的翼板19能够有效提高扫切式切刀1的结构强度，同时避免扫切式切刀1在扫动过程及剪线过程中出现抖动或晃动，提高剪线过程的稳定性和可靠性。
以上内容仅为本发明的较佳实施例，对于本领域的普通技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种改进自动剪线机构的缝纫机，包括凸出在针车面板之上的车缝臂，车缝臂的左上部固定有一固定车缝盖(3)，车缝臂向外的一侧设定为左侧，车缝臂的内部分别旋转安装有旋梭传动轴(5)和切刀驱动轴(2)，切刀驱动轴(2)套装在旋梭传动轴(5)的外缘，旋梭传动轴(5)的顶部设置有用于放置旋梭的旋梭座，其特征在于：包括一扫切式切刀(1)，
    固定车缝盖(3)的顶面板为有针板(33)，针板(33)的底面固定有固定刀片(4)；
    针板(33)的下方设置有切刀活动空间，切刀活动空间位于固定车缝盖(3)的侧壁和切刀驱动轴(2)之间；
    扫切式切刀(1)固定于切刀驱动轴(2)，扫切式切刀(1)设置于切刀活动空间，扫切式切刀(1)的上部设置有刀体(11)；
    在一次剪线过程中扫切式切刀(1)在固定车缝盖(3)下方的切刀活动空间来回移动一次，扫切式切刀(1)的刀体(11)与固定刀片(4)剪切配合。
  2. 根据权利要求1所述的一种改进自动剪线机构的缝纫机，其特征在于：所述缝纫机设置有旋梭传动机构和用于驱动所述切刀驱动轴(2)定角度往复旋转切刀驱动机构，旋梭传动机构连接所述旋梭传动轴(5)，切刀驱动机构连接切刀驱动轴(2)，在一次剪线过程中切刀驱动轴(2)带动扫切式切刀(1)在所述切刀活动空间沿弧形路径往复扫动一次；
    所述针板(33)的底面开设有一弧形槽(32)，所述固定刀片(4)固定于弧形槽(32)中，固定刀片(4)位于弧形槽(32)的一端，在初始状态下，固定刀片(4)和刀体(11)分别位于弧形槽(32)的两端，在剪线时刀体(11)在弧形槽(32)内沿弧形路径向固定刀片(4)移动并与固定刀片(4)剪切 配合。
  3. 根据权利要求2所述的一种改进自动剪线机构的缝纫机，其特征在于：所述针板(33)开设有一下针孔(31)，下针孔(31)向下穿透所述弧形槽(32)，下针孔(31)位于弧形槽(32)的中部位置；
    在初始状态时，所述刀体(11)和所述固定刀片(4)分别位于下针孔(31)下方的两侧位置；在刀体(11)与固定刀片(4)剪切配合时，刀体(11)与固定刀片(4)上下重叠于弧形槽(32)中；
    所述车缝臂的右上部卡接有一能翻开或取下的活动车缝盖，固定车缝盖(3)和活动车缝盖左右拼合并包覆车缝臂的上部；切刀驱动轴(2)设置在固定车缝盖(3)下方偏右的位置。
  4. 根据权利要求1至3之一所述的一种改进自动剪线机构的缝纫机，其特征在于：所述扫切式切刀(1)包括连结成一体的固定部(12)、支撑板(13)和所述刀体(11)，固定部(12)的顶部向上折弯延伸出所述支撑板(13)，支撑板(13)的上端部朝向内侧方向横向折弯出所述刀体(11)；
    所述切刀驱动轴(2)固定有夹套(21)，固定部(12)固定于夹套(21)，切刀驱动轴(2)来回旋转时刀体(11)在切刀驱动轴(2)外缘的圆环形区域中往复行走。
  5. 根据权利要求4所述的一种改进自动剪线机构的缝纫机，其特征在于：所述刀体(11)朝向固定刀片(4)的一端为前端部，刀体(11)的前端部成型有倾斜或弧形的斜向勾线部(15)，刀体(11)的顶面开设有一压线槽(16)，压线槽(16)的外端部向外延伸并穿透到斜向勾线部(15)，用于在扫向固定刀片的(4)的过程中勾住待剪切的线，压线槽(16)的内端部开设有一剪线配合孔(17)，剪线配合孔(17)穿透刀体(11)，剪线配合孔(17)的顶部 边缘设置成一剪切刃口(10)，所述固定刀片(4)朝向所述刀体(11)的一侧的底部边缘成型有剪切部(41)，剪切部(41)与剪切刃口(10)剪切配合。
  6. 根据权利要求5所述的一种改进自动剪线机构的缝纫机，其特征在于：所述弧形槽(32)中设置有压线片(6)，压线片(6)固定于所述固定刀片(4)下方，压线片(6)中部向下折弯出一压线弹片(61)，在所述刀体(11)与固定刀片(4)剪切配合时压线弹片(61)的端部弹性抵顶于所述压线槽(16)，用于将待剪切的线压住在压线槽(16)的槽底。
  7. 根据权利要求6所述的一种改进自动剪线机构的缝纫机，其特征在于：所述斜向勾线部(15)朝向所述切刀驱动轴(2)的一侧为内侧部、连接于所述支撑板(13)的一侧为外侧部，斜向勾线部(15)的内侧部成型为一尖部，斜向勾线部(15)的外侧部成型有一弧形挡线部(18)，尖部凸出在前。
  8. 根据权利要求7所述的一种改进自动剪线机构的缝纫机，其特征在于：所述弧形挡线部(18)的上下两端分别穿透所述刀体(11)的上下两面，弧形挡线部(18)第一侧与斜向勾线部(15)相切、第二侧与所述支撑板(13)相切；所述剪切部(41)凸出在刀体(11)的底部边缘，剪切部(41)朝向刀体(11)的端面为垂直平面，剪切部(41)的底面为弧形面。
  9. 根据权利要求7所述的一种改进自动剪线机构的缝纫机，其特征在于：所述支撑板(13)为弧形面板，弧形面板具有弧形凹面，支撑板(13)的弧形凹面朝向所述切刀驱动轴(2)，刀体(11)位于支撑板(13)的弧形凹面的顶部。
  10. 根据权利要求7所述的一种改进自动剪线机构的缝纫机，其特征在于：所述支撑板(13)背向所述固定刀片(4)的一侧设置有一翼板(19)，翼板(19)是从所述刀体(11)的后端部向外侧延伸而成的弧形面板，翼板(19) 的顶部与所述刀体(11)的顶面齐平；所述翼板(19)的内表面成型有凹凸部，延伸板下部的厚度大于上部的厚度。
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CN110373828A (zh) * 2019-08-28 2019-10-25 周富前 剪线带底线抓线一体装置及缝纫机
CN112195575A (zh) * 2020-10-31 2021-01-08 温州世邦缝制设备有限公司 一种罗拉车
CN114000275A (zh) * 2021-11-30 2022-02-01 浙江越隆缝制设备有限公司 一种刺绣机梭箱体的剪线方法
CN114575065A (zh) * 2020-11-30 2022-06-03 琦星智能科技股份有限公司 一种缝纫机的剪线机构
CN115161902A (zh) * 2022-05-31 2022-10-11 苏州日和缝制设备有限公司 一种针板组件
CN117230593A (zh) * 2023-09-25 2023-12-15 飞跃时代(浙江)科技有限公司 一种用于刺绣机的剪线结构

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CN101845722A (zh) * 2009-03-24 2010-09-29 启翔针车（上海）有限公司 一种缝纫机的自动切线装置
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110373828A (zh) * 2019-08-28 2019-10-25 周富前 剪线带底线抓线一体装置及缝纫机
CN112195575A (zh) * 2020-10-31 2021-01-08 温州世邦缝制设备有限公司 一种罗拉车
CN114575065A (zh) * 2020-11-30 2022-06-03 琦星智能科技股份有限公司 一种缝纫机的剪线机构
CN114000275A (zh) * 2021-11-30 2022-02-01 浙江越隆缝制设备有限公司 一种刺绣机梭箱体的剪线方法
CN114000275B (zh) * 2021-11-30 2022-11-11 浙江越隆缝制设备有限公司 一种刺绣机梭箱体的剪线方法
CN115161902A (zh) * 2022-05-31 2022-10-11 苏州日和缝制设备有限公司 一种针板组件
CN117230593A (zh) * 2023-09-25 2023-12-15 飞跃时代(浙江)科技有限公司 一种用于刺绣机的剪线结构

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