阅读说明：本技术 同步平缝机链式线迹机构及具有该机构的同步平缝机 (Chain type stitch mechanism of synchronous lockstitch sewing machine and synchronous lockstitch sewing machine with same ) 是由 陈晓波 于 2020-06-19 设计创作，主要内容包括：本发明属于平缝机技术领域,尤其涉及一种同步平缝机链式线迹机构及具有该机构的同步平缝机。本发明针对现有技术中能进行链式线迹缝纫的平缝机结构较为复杂,造价较高的问题,提供一种同步平缝机链式线迹机构及具有该机构的同步平缝机,包括驱动机构和与驱动机构驱动连接的穿刺机构,还包括可驱动勾线弯针发生靠近或远离穿刺针轴心线移动的勾线机构,所述勾线机构与穿刺机构之间还设有同步驱动组件,所述同步驱动组件一端与穿刺机构相连接,另一端与勾线机构相连接。本发明利用设置在穿刺针下方的勾线弯针勾线形成线环,同时利用同步驱动组件同步穿刺机构与勾线机构的转动速度,从而保证形成较为完整、连续的链式线迹。(The invention belongs to the technical field of lockstitch sewing machines, and particularly relates to a chain type stitch mechanism of a synchronous lockstitch sewing machine and the synchronous lockstitch sewing machine with the chain type stitch mechanism. The invention provides a chain stitch mechanism of a synchronous lockstitch machine and the synchronous lockstitch machine with the same, aiming at the problems of more complex structure and higher manufacturing cost of the lockstitch machine which can carry out chain stitch sewing in the prior art. The invention utilizes the hook wire of the hook wire bending needle arranged below the puncture needle to form a wire loop, and simultaneously utilizes the synchronous driving component to synchronize the rotating speeds of the puncture mechanism and the hook wire mechanism, thereby ensuring that a more complete and continuous chain type stitch is formed.)

1. The utility model provides a synchronous flush joint machine chain stitch mechanism, includes actuating mechanism (1) and piercing mechanism (2) be connected with actuating mechanism (1) drive, and the one end in piercing mechanism (2) is connected in pjncture needle (3), actuating mechanism (1) accessible piercing mechanism (2) drive pjncture needle (3) along vertical direction upward reciprocating motion, its characterized in that: still including driving collude line looper (5) and take place to be close to or keep away from line mechanism (4) that colludes that pjncture needle (3) axial lead removed, collude line looper (5) and connect in the one end of colluding line mechanism (4) and be located the below of pjncture needle (3), collude line mechanism (4) and be located puncture mechanism (2) below, collude and still be equipped with between line mechanism (4) and puncture mechanism (2) and can make collude line mechanism (4) and puncture mechanism (2) with angular velocity pivoted synchronous drive subassembly (6), synchronous drive subassembly (6) one end is connected with puncture mechanism (2), and the other end is connected with colluding line mechanism (4).

2. The chain stitch mechanism of a synchronous lockstitch machine as claimed in claim 1, wherein: the synchronous driving assembly (6) comprises a first transmission gear (61) fixedly connected to the puncture mechanism (2) and a second transmission gear (62) fixedly connected to the thread hooking mechanism (4), and the synchronous driving assembly (6) further comprises a synchronous transmission rod (63) which is located between the first transmission gear (61) and the second transmission gear (62) and is meshed with the first transmission gear (61) and the second transmission gear (62) at two ends respectively.

3. The synchronous lockstitch chain stitch mechanism as recited in claim 2, wherein: the first transmission gear (61) and the second transmission gear (62) are both conical gears, and two ends of the synchronous transmission rod (63) are respectively provided with a conical gear meshed with the conical gears.

4. The chain stitch mechanism of a synchronous lockstitch machine as claimed in claim 1, wherein: the puncture mechanism (2) comprises a puncture driving rod (21) in driving connection with the driving mechanism (1), the synchronous driving assembly (6) is connected to the puncture driving rod (21), one end of the puncture driving rod (21) far away from the driving mechanism (1) is fixedly connected with a driving wheel (22), one end of a transmission connecting rod (23) is rotatably connected to the driving wheel (22), the axial lead of the driving wheel (22) does not pass through a rotating connection point of the transmission connecting rod (23) and the driving wheel (22), the other end of the transmission connecting rod (23) is rotatably connected with a mounting sleeve (24), and the puncture needle (3) is connected to the mounting sleeve (24).

5. The chain stitch mechanism of a synchronous lockstitch machine as claimed in claim 1, wherein: collude line mechanism (4) include with collude line actuating lever (41), synchronous drive subassembly (6) are connected on colluding line actuating lever (41), the one end fixedly connected with that puncture actuating lever (41) are close to pjncture needle (3) can make collude line looper (5) take place to be close to or keep away from pjncture needle (3) axial lead wobbling looper swing subassembly (42), collude line looper (5) fixed connection is on looper swing subassembly (42).

6. The synchronous lockstitch chain stitch mechanism as recited in claim 5, wherein: the looper swinging assembly (42) comprises an eccentric wheel (43) and a swing fork (44) which are connected to a thread hooking driving rod (41), the bottom end of the swing fork (44) is rotatably connected with a positioning rod (45), the upper end of the swing fork (44) extends to the two sides of the eccentric wheel (43), the eccentric wheel (43) can be pressed on the swing fork (44) by rotating the eccentric wheel (43), the swing fork (44) rotates by taking the positioning rod (45) as the center, and the thread hooking looper (5) is fixedly connected to the swing fork (44).

7. The chain stitch mechanism of a synchronous lockstitch machine as claimed in claim 6, wherein: still be equipped with looper mount pad (46) between colluding line looper (5) and pendulum fork (44), looper mount pad (46) are through transmission sleeve pipe (47) and pendulum fork (44) fixed connection, transmission sleeve pipe (47) cup joint outside locating lever (45) and rotate with locating lever (45) and be connected.

8. The synchronous lockstitch chain stitch mechanism as recited in claim 7, wherein: the axial lead of transmission sleeve pipe (47) and locating lever (45) coincides mutually, and transmission sleeve pipe (47) internal surface protrusion has a plurality of support bars (48), support bar (48) have between two adjacent support bars (48) support clearance (49) along the radial extension of transmission sleeve pipe (47), locating lever (45) surface is pressed and is established on support bar (48).

9. The chain stitch mechanism of a synchronous lockstitch machine as claimed in claim 1, wherein: the line looper (5) below still be equipped with can take place synchronous motion with line looper (5) and protect needle frame (7), the one end of protecting needle frame (7) extends to outside line looper (5) on the horizontal direction.

10. A synchronous lockstitch sewing machine, includes casing (100), its characterized in that: a synchronous lockstitch chain stitch mechanism as claimed in any one of claims 1 to 9 is provided in the housing (100).

Technical Field

The invention belongs to the technical field of lockstitch sewing machines, and particularly relates to a chain type stitch mechanism of a synchronous lockstitch sewing machine and the synchronous lockstitch sewing machine with the chain type stitch mechanism.

Background

Today, sewing machines are already known in the production life. Sewing machines can be classified into lock-stitch, single-thread chain stitch, and double-thread chain stitch sewing machines, depending on the type of stitch to be sewn. The term "stitch" means a unit formed by a sewing thread at a pitch every time a sewing machine needle passes through a material to be sewn twice in a sewing process. The different requirements for the stitches are decisive for the choice of sewing machine. Chain stitches have good stitch fastness and ravel resistance, and are therefore often used in fabric sewing. However, the flat sewing machine capable of performing chain stitch sewing in the prior art has a complex structure and high cost.

For example, the chinese utility model patent discloses a lockstitch sewing machine [ application number: 201520445262.9], the utility model comprises a workbench, a feeding device, a clamping device, a positioning device and a sewing device, wherein the feeding device, the clamping device and the sewing device are arranged on the workbench; the feeding device is provided with a fixed base, a cloth feeding roller, a first driving element and a second driving element, the cloth feeding roller is connected to the fixed base through a shaft, the first driving element is connected with the fixed base and used for driving the fixed base to move, and the second driving element is connected to the cloth feeding roller and used for driving the cloth feeding roller to rotate by receiving a sewing signal of the sewing device; the material clamping device is provided with a plurality of material clamping plates, wherein at least two material clamping plates are arranged in an overlapping mode, cut pieces are placed between the two material clamping plates arranged in the overlapping mode, and sewing channels are arranged at the positions corresponding to the two material clamping plates; the sewing needle of the sewing device faces the sewing channel; the positioning device is provided with a detection element and a plurality of light reflecting elements, the light reflecting elements are located on the uppermost layer material clamping plate of the material clamping device, and the detection element is arranged on the sewing device and used for sensing the light reflecting elements and giving a needle distance changing signal to the sewing device.

The utility model discloses a have the advantage that can realize the cut-parts of the different gauge needle of sewing at the assigned position automatically, but it still does not solve above-mentioned problem.

Disclosure of Invention

The invention aims to solve the problems and provides a chain stitch mechanism of a synchronous flat sewing machine, which can be used for simply, conveniently, stably and reliably sewing chain stitches.

Another object of the present invention is to solve the above problems and to provide a synchronous lockstitch sewing machine which can sew chain stitches easily, conveniently, stably and reliably.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a synchronous flush joint machine chain stitch mechanism, includes actuating mechanism and the piercing mechanism who is connected with the actuating mechanism drive, and the one end at piercing mechanism is connected to the pjncture needle, actuating mechanism accessible piercing mechanism drive pjncture needle is along reciprocating motion in the vertical direction, still including can drive the looper of colluding the line take place to be close to or keep away from the mechanism of colluding that pjncture needle axial lead removed, collude the line looper and connect the one end at the mechanism of colluding the line and be located the below of pjncture needle, collude the line mechanism and be located the piercing mechanism below, still be equipped with between colluding the line mechanism and the piercing mechanism and make the mechanism of colluding the same angular velocity pivoted synchronous drive subassembly of line mechanism and piercing mechanism, synchronous drive subassembly one end is connected.

In the chain stitch mechanism of the synchronous lockstitch sewing machine, the synchronous driving component comprises a first transmission gear fixedly connected to the puncture mechanism and a second transmission gear fixedly connected to the thread hooking mechanism, and the synchronous driving component further comprises a synchronous transmission rod which is positioned between the first transmission gear and the second transmission gear and two ends of which are respectively meshed with the first transmission gear and the second transmission gear.

In the chain stitch mechanism of the synchronous lockstitch sewing machine, the first transmission gear and the second transmission gear are both conical gears, and two ends of the synchronous transmission rod are respectively provided with a conical gear meshed with the conical gears.

In the chain stitch mechanism of the synchronous lockstitch sewing machine, the puncture mechanism comprises a puncture driving rod in driving connection with the driving mechanism, the synchronous driving component is connected to the puncture driving rod, one end of the puncture driving rod, which is far away from the driving mechanism, is fixedly connected with a driving wheel, one end of a transmission connecting rod is rotatably connected to the driving wheel, the axial lead of the driving wheel does not pass through the rotating connection point of the transmission connecting rod and the driving wheel, the other end of the transmission connecting rod is rotatably connected with a mounting sleeve, and the puncture needle is connected to the mounting sleeve.

In foretell synchronous lockstitch machine chain stitch mechanism, collude the line mechanism include with collude the line actuating lever, the synchronous drive subassembly is connected on colluding the line actuating lever, the puncture actuating lever is close to the one end fixedly connected with of pjncture needle and can makes collude the line looper take place to be close to or keep away from pjncture needle axial lead wobbling looper swing subassembly, collude line looper fixed connection on the looper swing subassembly.

In the chain stitch mechanism of the synchronous lockstitch sewing machine, the looper swing assembly comprises an eccentric wheel and a swing fork which are connected to a thread hooking driving rod, the bottom end of the swing fork is rotatably connected with a positioning rod, the upper end of the swing fork extends to two sides of the eccentric wheel, the eccentric wheel is rotated to enable the eccentric wheel to be pressed on the swing fork and enable the swing fork to rotate by taking the positioning rod as the center, and the thread hooking looper is fixedly connected to the swing fork.

In the chain stitch mechanism of the synchronous lockstitch sewing machine, a looper mounting seat is further arranged between the looper and the swing fork, the looper mounting seat is fixedly connected with the swing fork through a transmission sleeve, and the transmission sleeve is sleeved outside the positioning rod and is rotatably connected with the positioning rod.

In foretell synchronous flush joint machine chain stitch mechanism, the axial lead of transmission sleeve pipe and locating lever coincides mutually, and the protrusion of transmission sleeve pipe internal surface has a plurality of support bars, the support bar extends along transmission sleeve pipe's radial, has the support clearance between two adjacent support bars, locating lever surface pressure is established on the support bar.

In the chain stitch mechanism of the synchronous lockstitch sewing machine, a needle protecting frame which can move synchronously with the looper is arranged below the looper, and one end of the needle protecting frame extends to the outside of the looper in the horizontal direction.

A synchronous lockstitch sewing machine comprises a machine shell, wherein the machine shell is internally provided with the chain type stitch mechanism of the synchronous lockstitch sewing machine.

Compared with the prior art, the invention has the advantages that:

1. the invention utilizes the hook-bending needle and the hook to form a wire loop, and utilizes the synchronous driving component to synchronize the rotating speeds of the puncture mechanism and the hook mechanism, namely, the puncture frequency of the puncture needle and the hook frequency of the hook-bending needle, thereby ensuring that a more complete and continuous chain stitch is formed.

2. The invention also provides a looper mounting seat and a transmission sleeve for transmission between the swing fork and the looper, so that the swing amplitude of the looper is different from that of the swing fork, namely the swing amplitude of the looper can be amplified by prolonging the length of the looper mounting seat, the swing fork only needs smaller swing amplitude in the cloth sewing process, and the vibration generated when the swing fork swings back and forth at high frequency is reduced.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the internal structure of the present invention;

FIG. 4 is a schematic structural view of a portion of the structure of the present invention;

FIG. 5 is an exploded view of a portion of the structure of the present invention;

in the figure: the puncture needle comprises a driving mechanism 1, a puncture mechanism 2, a puncture needle 3, a thread hooking mechanism 4, a thread hooking curved needle 5, a synchronous driving assembly 6, a needle protecting frame 7, a puncture driving rod 21, a driving wheel 22, a driving connecting rod 23, a mounting sleeve 24, a thread hooking driving rod 41, a curved needle swinging assembly 42, an eccentric wheel 43, a swinging fork 44, a positioning rod 45, a curved needle mounting seat 46, a driving sleeve 47, a supporting strip 48, a supporting gap 49, a first driving gear 61, a second driving gear 62, a synchronous driving rod 63 and a machine shell 100.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.