CN111648048B - Synchronous lockstitch sewing machine chain stitch mechanism and synchronous lockstitch sewing machine having the same - Google Patents
Synchronous lockstitch sewing machine chain stitch mechanism and synchronous lockstitch sewing machine having the same Download PDFInfo
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- CN111648048B CN111648048B CN202010566768.0A CN202010566768A CN111648048B CN 111648048 B CN111648048 B CN 111648048B CN 202010566768 A CN202010566768 A CN 202010566768A CN 111648048 B CN111648048 B CN 111648048B
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
- D05B1/02—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making single-thread seams
- D05B1/04—Running-stitch seams
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/14—Needle-bar drives
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/30—Driving-gear for loop takers
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
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 present invention belongs to the technical field of lockstitch sewing machines, and in particular, relates to a synchronous lockstitch sewing machine chain stitch mechanism and a synchronous lockstitch sewing machine having the mechanism. In view of the problem that the lockstitch sewing machine capable of chain stitch sewing in the prior art is relatively complex in structure and high in cost, the present invention provides a synchronous lockstitch sewing machine chain stitch mechanism and a synchronous lockstitch sewing machine having the mechanism, comprising a driving mechanism and a piercing mechanism connected to the driving mechanism, and also comprising a thread hooking mechanism capable of driving a thread hooking curved needle to move closer to or away from the axis of the piercing needle, and a synchronous driving assembly is further provided between the thread hooking mechanism and the piercing mechanism, one end of the synchronous driving assembly is connected to the piercing mechanism, and the other end is connected to the thread hooking mechanism. The present invention utilizes a thread hooking curved needle arranged below the piercing needle to hook the thread to form a thread loop, and at the same time utilizes the synchronous driving assembly to synchronize the rotation speeds of the piercing mechanism and the thread hooking mechanism, thereby ensuring the formation of a relatively complete and continuous chain stitch.
Description
Technical Field
The invention belongs to the technical field of lockstitch sewing machines, and particularly relates to a chain stitch mechanism of a synchronous lockstitch sewing machine and the synchronous lockstitch sewing machine with the same.
Background
Today with advanced technology, sewing machines have long been a familiar product in production and life. The sewing machine can be classified into a lock stitch, a single chain stitch, a double chain stitch sewing machine, and the like according to different sewing stitches. The stitch means a unit consisting of a stitch at a pitch of a sewing machine needle every time the needle passes through a sewing material twice during sewing. The different demands on the thread are decisive factors for the choice of the sewing machine. The chain stitch has better stitch fastness and anti-stripping capability, so the chain stitch is commonly applied to cloth sewing. But the lockstitch sewing machine capable of carrying out chain stitch sewing in the prior art has the disadvantages of complex structure and high manufacturing cost.
For example, china patent utility model discloses a flat seaming machine [ application number: 201520445262.9], which 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, a cloth feeding roller shaft is connected with the fixed base, the first driving element is connected with the fixed base and is used for driving the fixed base to move, the second driving element is connected with the cloth feeding roller and is used for driving the cloth feeding roller to rotate by receiving sewing signals of the sewing device, the clamping device is provided with a plurality of clamping plates, at least two clamping plates are overlapped, a cutting sheet is placed between the two clamping plates which are overlapped, the corresponding positions of the two clamping plates are provided with sewing channels, a sewing needle of the sewing device faces the sewing channel, the positioning device is provided with a detection element and a plurality of reflection elements, and the reflection elements are arranged on the reflection element and are used for detecting the reflection element and are arranged on the reflection element.
The utility model has the advantage of automatically sewing cut pieces with different needle pitches at a designated position, but the utility model still does not solve the problems.
Disclosure of Invention
The invention aims to solve the problems and provide a chain stitch mechanism of a synchronous flat sewing machine, which can simply, conveniently, stably and reliably sew chain stitches.
Another object of the present invention is to provide a synchronous flat seaming machine that can simply, conveniently, stably and reliably stitch chain stitches in view of the above-mentioned problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a synchronous flush joint machine chain stitch mechanism, includes actuating mechanism and the piercing depth who is connected with actuating mechanism drive, and the piercing depth is connected in piercing depth's one end, actuating mechanism accessible piercing depth drives the piercing depth along vertical direction up reciprocating motion, still includes and can drive the curved needle of colludeing the line and take place to be close to or keep away from the wire mechanism that colludes that the piercing depth axial lead removed, colludes the curved needle and connects in the one end of colluding the line mechanism and lie in the below of piercing depth, colludes the line mechanism and lies in piercing depth below, it still is equipped with the synchronous drive subassembly that can make the same angular velocity pivoted of wire mechanism and piercing depth to collude between wire mechanism and the piercing depth, synchronous drive subassembly one end is connected with piercing depth, and the other end is connected with colludes the line mechanism.
In the chain stitch mechanism of the synchronous flat seaming machine, the synchronous driving assembly comprises a first transmission gear fixedly connected to the puncture mechanism and a second transmission gear fixedly connected to the thread hooking mechanism, and 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 flat seaming machine, the first transmission gear and the second transmission gear are bevel gears, and two bevel gears meshed with the bevel gears are respectively arranged at two ends of the synchronous transmission rod.
In the chain stitch mechanism of the synchronous flat seaming machine, the puncture mechanism comprises a puncture driving rod in driving connection with the driving mechanism, the synchronous driving assembly is connected to the puncture driving rod, one end of the puncture driving rod, far away from the driving mechanism, is fixedly connected with a driving wheel, one end of the driving connecting rod is rotationally connected to the driving wheel, the axial lead of the driving wheel is not connected with a rotational connection point of the driving wheel through the driving connecting rod, the other end of the driving connecting rod is rotationally connected with a mounting sleeve, and the puncture needle is connected to the mounting sleeve.
In the chain stitch mechanism of the synchronous flat sewing machine, the thread hooking mechanism comprises a thread hooking driving rod, the synchronous driving assembly is connected to the thread hooking driving rod, one end of the puncture driving rod, which is close to the puncture needle, is fixedly connected with a curved needle swinging assembly which can enable the thread hooking curved needle to swing close to or away from the axial lead of the puncture needle, and the thread hooking curved needle is fixedly connected to the curved needle swinging assembly.
In the chain stitch mechanism of the synchronous flat seaming machine, the curved needle swinging component comprises an eccentric wheel and a swinging fork which are connected to the thread hooking driving rod, the bottom end of the swinging fork is rotationally connected with the positioning rod, the upper end of the swinging fork extends to two sides of the eccentric wheel, the eccentric wheel is rotated to enable the eccentric wheel to be pressed on the swinging fork and enable the swinging fork to rotate with the positioning rod as the center, and the thread hooking curved needle is fixedly connected to the swinging fork.
In the chain stitch mechanism of the synchronous flat seaming machine, a looper mounting seat is further arranged between the looper and the swinging fork, the looper mounting seat is fixedly connected with the swinging fork through a transmission sleeve, and the transmission sleeve is sleeved outside the positioning rod and is rotationally connected with the positioning rod.
In the chain stitch mechanism of the synchronous flat seaming machine, the transmission sleeve is overlapped with the axial lead of the positioning rod, a plurality of supporting bars are protruded from the inner surface of the transmission sleeve, the supporting bars extend along the radial direction of the transmission sleeve, supporting gaps are reserved between two adjacent supporting bars, and the outer surface of the positioning rod is pressed on the supporting bars.
In the chain stitch mechanism of the synchronous flat sewing machine, a needle protection frame capable of synchronously moving with the thread hooking loopers is further arranged below the thread hooking loopers, and one end of the needle protection frame extends out of the thread hooking loopers in the horizontal direction.
The synchronous flat seaming machine comprises a machine shell, wherein the chain stitch mechanism of the synchronous flat seaming machine is arranged in the machine shell.
Compared with the prior art, the invention has the advantages that:
1. The invention uses the thread hooking curved needle arranged below the puncture needle to hook the thread loop, and simultaneously uses the synchronous driving component to synchronize the rotation speed of the puncture mechanism and the thread hooking mechanism, namely the puncture frequency of the puncture needle and the thread hooking frequency of the thread hooking curved needle, thereby ensuring the formation of a relatively complete and continuous chain stitch.
2. The invention also provides the curved needle mounting seat and the transmission sleeve for transmission between the swinging fork and the curved needle, so that the swinging amplitude of the curved needle is different from that of the swinging fork, and the swinging amplitude of the curved needle can be amplified by prolonging the length of the curved needle mounting seat, so that the swinging fork only needs smaller swinging amplitude in the cloth sewing process, and the vibration generated when the swinging 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 view of a part 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 drawing, 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 component 6, a needle protection 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 component 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 bar 48, a supporting gap 49, a first driving gear 61, a second driving gear 62, a synchronous driving rod 63 and a casing 100.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
Example 1
The embodiment provides a chain stitch mechanism of a synchronous flat sewing machine, which is shown in fig. 1-3, and comprises a driving mechanism 1 and a puncture mechanism 2 in driving connection with the driving mechanism 1, wherein the driving mechanism 1 can be a driving motor, and can also be other specific structures capable of realizing driving in the prior art, the puncture needle 3 is connected at one end of the puncture mechanism 2, the driving mechanism 1 can drive the puncture needle 3 to reciprocate along the vertical direction through the puncture mechanism 2, the chain stitch mechanism further comprises a thread hooking mechanism 4 capable of driving a thread hooking curved needle 5 to move close to or far away from the axial lead of the puncture needle 3, the thread hooking curved needle 5 is connected at one end of the thread hooking mechanism 4 and is positioned below the puncture needle 3, the thread hooking mechanism 4 is positioned below the puncture mechanism 2, and a synchronous driving assembly 6 capable of enabling the thread hooking mechanism 4 to rotate at the same angular speed as the puncture mechanism 2 is further arranged between the thread hooking mechanism 4 and the puncture mechanism 2, so that the puncture frequency of the puncture needle 3 is ensured to be consistent with the thread hooking frequency of the thread hooking curved needle 5 after each rotation of the thread hooking mechanism 4 is ensured. One end of the synchronous driving component 6 is connected with the puncture mechanism 2, and the other end is connected with the thread hooking mechanism 4. The driving connection between the driving mechanism 1 and the puncturing mechanism 2 may be a direct driving connection or an indirect driving connection, for example, the driving mechanism 1 and the thread hooking mechanism 4 may be in driving connection, and then the driving mechanism 1 and the puncturing mechanism 2 are driven indirectly by the synchronous driving assembly 6.
When the invention is used, the driving mechanism 1 is started, the driving mechanism 1 enables the puncture needle 3 with the suture to puncture the cloth, the puncture needle 3 is lifted to form a loop after moving to the lowest position, at the moment, the loop is hooked by the hooking curved needle 5 which is moved to the position right below the puncture needle 3, the puncture needle 3 continues to lift until the puncture needle is withdrawn from the cloth, the hooking curved needle 5 continues to move to enlarge the loop, at the moment, the cloth is pushed to move for a needle distance, the puncture needle 3 secondarily punctures the cloth to form a new loop, at the moment, the hooking curved needle 5 is separated from an old loop, so that the old loop is tensioned when the puncture needle 3 secondarily punctures, the puncture needle 3 is lifted after moving to the lowest position, the hooking curved needle 5 rotates to hook the new loop, and thus the chained stitch is repeatedly obtained. The driving mechanism 1 drives the puncture mechanism 2 and the thread hooking mechanism 4 to rotate at the same angular speed under the transmission of the synchronous driving assembly 6, so that the puncture frequency of the puncture needle 3 is kept consistent with the thread hooking frequency of the thread hooking curved needle 5, namely, the thread hooking curved needle 5 completes one reciprocating movement every time the puncture needle 3 completes lifting puncture, and the thread hooking curved needle 5 arranged below the puncture needle 3 is used for hooking a thread loop, and meanwhile, the synchronous driving assembly 6 is used for synchronizing the rotation speeds of the puncture mechanism 2 and the thread hooking mechanism 4, namely, the puncture frequency of the puncture needle 3 and the thread hooking frequency of the thread hooking curved needle 5, so that a relatively complete and continuous chain stitch is ensured to be formed.
As shown in fig. 3, the synchronous driving assembly 6 includes 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 includes a synchronous transmission rod 63 disposed between the first transmission gear 61 and the second transmission gear 62 and having both ends respectively engaged with the first transmission gear 61 and the second transmission gear 62.
The first transmission gear 61 and the second transmission gear 62 may be synchronously rotated by using a gear-rack meshing method, but preferably, the first transmission gear 61 and the second transmission gear 62 are both tapered gears, and two ends of the synchronous transmission rod 63 are respectively provided with a tapered gear meshed with the tapered gears. That is, the same angular velocity rotation of the first transmission gear 61 and the second transmission gear 62 is realized by the mutual engagement of the bevel gears, so that the same angular velocity rotation of the thread hooking mechanism 4 and the puncture mechanism 2 is realized. In this way, the synchronous transmission rod 63 only rotates in the transmission process, so that compared with the mode that the rack is required to be displaced in the gear-rack transmission process, the space is saved, and the whole structure is compact.
As shown in fig. 3, 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 driving connecting rod 23 is rotatably connected to the driving wheel 22, and the axial lead of the driving wheel 22 is not connected with the rotating connection point of the driving wheel 22 through the driving connecting rod 23, namely, the driving connecting rod 23 is eccentrically connected with 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 with the mounting sleeve 24. So that the puncture needle 3 can be lowered and raised once every rotation of the driving wheel 22.
Referring to fig. 3-5, the thread hooking mechanism 4 includes a thread hooking driving rod 41, the synchronous driving assembly 6 is connected to the thread hooking driving rod 41, one end of the puncture driving rod 41, which is close to the puncture needle 3, is fixedly connected with a curved needle swinging assembly 42 which can swing the thread hooking curved needle 5 close to or far away from the axis of the puncture needle 3, and the thread hooking curved needle 5 is fixedly connected to the curved needle swinging assembly 42. When in use, the synchronous driving component 6 drives the thread hooking driving rod 41 to rotate so that the curved needle swinging component 42 at the end part swings reciprocally, thereby leading the thread hooking curved needle 5 to swing reciprocally close to or far away from the axis line of the puncture needle 3, and achieving the functions of hooking the thread loop and releasing the thread loop.
Specifically, the curved needle swinging component 42 includes an eccentric wheel 43 and a swinging fork 44 connected to the thread hooking driving rod 41, a positioning rod 45 is rotatably connected to the bottom end of the swinging fork 44, the upper end of the swinging fork 44 extends to two sides of the eccentric wheel 43, the eccentric wheel 43 is rotated to press the eccentric wheel 43 onto the swinging fork 44 and rotate the swinging fork 44 around the positioning rod 45, and the thread hooking curved needle 5 is fixedly connected to the swinging fork 44. When the eccentric wheel 43 is driven to rotate, the eccentric wheel 43 repeatedly applies pressure to the two sides of the swinging fork 44 alternately, so that the swinging fork 44 swings, and the swinging fork 44 completes one reciprocating swing after each circle of rotation of the eccentric wheel 43. A curved needle mounting seat 46 is further arranged between the thread hooking curved needle 5 and the swinging fork 44, the curved needle mounting seat 46 is fixedly connected with the swinging fork 44 through a transmission sleeve 47, and the transmission sleeve 47 is sleeved outside the positioning rod 45 and is rotationally connected with the positioning rod 45.
The invention also provides the curved needle mounting seat 46 and the transmission sleeve 47 for transmission between the swinging fork 44 and the curved needle 5, so that the swinging amplitude of the curved needle 5 is different from that of the swinging fork 44, and the swinging amplitude of the curved needle 5 can be amplified by prolonging the length of the curved needle mounting seat 46, so that the swinging fork 44 only needs smaller swinging amplitude in the cloth sewing process, thereby reducing the vibration generated when the swinging fork 44 swings back and forth in high frequency.
As shown in fig. 5, the transmission sleeve 47 coincides with the axis of the positioning rod 45, the positioning rod 45 is fixedly arranged, for example, can be fixedly connected to the casing 100, a plurality of supporting bars 48 protrude from the inner surface of the transmission sleeve 47, the supporting bars 48 extend along the radial direction of the transmission sleeve 47, a supporting gap 49 is provided between two adjacent supporting bars 48, and the outer surface of the positioning rod 45 is pressed on the supporting bars 48. This reduces the contact area between the drive sleeve 47 and the positioning rod 45, so that the positioning rod 45 provides radial support to the drive sleeve 47 while reducing the friction between the drive sleeve 47 and the positioning rod 45 as they oscillate.
As shown in fig. 4, a needle protecting frame 7 capable of synchronously moving with the thread hooking loopers 5 is further arranged below the thread hooking loopers 5, and one end of the needle protecting frame 7 extends out of the thread hooking loopers 5 in the horizontal direction. Thus, in the use process, if an obstacle appears on the swinging path, the needle guard frame 7 can be contacted with the obstacle before the thread hooking curved needle 5, so that the thread hooking curved needle 5 is prevented from being damaged in the use process.
When the puncture needle is used, the driving mechanism 1 is started, the driving mechanism 1 drives the puncture driving rod 21 to rotate, the transmission wheel 22 and the puncture driving rod 21 synchronously rotate, the transmission wheel 22 enables the puncture needle 3 to reciprocate in the vertical direction through the transmission connecting rod 23, the thread hooking driving rod 41 rotates at the same angular speed as the puncture driving rod 21 under the transmission action of the synchronous transmission rod 63, the eccentric wheel 43 is driven to rotate, the eccentric wheel 43 pushes the swinging fork 44 to swing by taking the positioning rod 45 as the axis, and the thread hooking bent needle 5 is driven to reciprocate through the bent needle mounting seat 46 and the transmission sleeve 47. The puncture needle 3 is provided with a suture, after the cloth is punctured, the puncture needle 3 moves to the lowest position to rise back to form a loop, at the moment, the loop is hooked by the hook wire bending needle 5 swinging right below the puncture needle 3, the puncture needle 3 continues to rise back until the cloth is withdrawn, the hook wire bending needle 5 continues to swing to enlarge the loop, at the moment, the cloth is pushed to move a needle distance, the puncture needle 3 secondarily punctures the cloth to form a new loop, at the moment, the hook wire bending needle 5 is separated from an old loop, so that the old loop is tensioned during secondary puncture of the puncture needle 3, the puncture needle 3 rises back after moving to the lowest position, the hook wire bending needle 5 swings to hook the new loop, and chain stitch is repeatedly obtained in this way. The driving mechanism 1 drives the puncture mechanism 2 and the thread hooking mechanism 4 to rotate at the same angular speed under the transmission of the synchronous driving assembly 6, so that the puncture frequency of the puncture needle 3 is kept consistent with the thread hooking frequency of the thread hooking curved needle 5, namely, the thread hooking curved needle 5 completes one reciprocating movement every time the puncture needle 3 completes lifting puncture, and the thread hooking curved needle 5 arranged below the puncture needle 3 is used for hooking a thread loop, and meanwhile, the synchronous driving assembly 6 is used for synchronizing the rotation speeds of the puncture mechanism 2 and the thread hooking mechanism 4, namely, the puncture frequency of the puncture needle 3 and the thread hooking frequency of the thread hooking curved needle 5, so that a relatively complete and continuous chain stitch is ensured to be formed.
Example 2
The embodiment provides a synchronous flat seaming machine, which is shown in combination with fig. 1-5, and comprises a machine shell 100, wherein a chain stitch mechanism of the synchronous flat seaming machine described in embodiment 1 is arranged in the machine shell 100.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Although the terms of the driving mechanism 1, the puncture mechanism 2, the puncture needle 3, the thread hooking mechanism 4, the thread hooking curved needle 5, the synchronous driving assembly 6, the needle guard 7, the puncture driving rod 21, the driving wheel 22, the driving link 23, the mounting sleeve 24, the thread hooking driving rod 41, the curved needle swinging assembly 42, the eccentric wheel 43, the swinging fork 44, the positioning rod 45, the curved needle mounting seat 46, the driving sleeve 47, the supporting bar 48, the supporting gap 49, the first driving gear 61, the second driving gear 62, the synchronous driving rod 63, the casing 100, etc. are used more herein, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the nature of the invention and should be construed in a manner consistent with their spirit and scope.
Claims (5)
1. The chain stitch mechanism of the synchronous flat sewing machine comprises a driving mechanism (1) and a puncture mechanism (2) in driving connection with the driving mechanism (1), wherein a puncture needle (3) is connected to one end of the puncture mechanism (2), the driving mechanism (1) can drive the puncture needle (3) to reciprocate along the vertical direction through the puncture mechanism (2), the chain stitch mechanism is characterized by further comprising a thread hooking mechanism (4) capable of driving a thread hooking curved needle (5) to move close to or far away from the axis of the puncture needle (3), the thread hooking curved needle (5) is connected to one end of the thread hooking mechanism (4) and is positioned below the puncture needle (3), the thread hooking mechanism (4) is positioned below the puncture mechanism (2), a synchronous driving assembly (6) capable of enabling the thread hooking mechanism (4) to rotate at the same angular speed as the puncture mechanism (2) is arranged between the thread hooking mechanism (4) and the puncture mechanism (2), and one end of the synchronous driving assembly (6) is connected with the puncture mechanism (2), and the other end of the synchronous driving assembly is connected with the thread hooking mechanism (4);
The thread hooking mechanism (4) comprises a thread hooking driving rod (41), the synchronous driving assembly (6) is connected to the thread hooking driving rod (41), one end of the thread hooking driving rod (41) close to the puncture needle (3) is fixedly connected with a curved needle swinging assembly (42) which can enable a thread hooking curved needle (5) to swing close to or far away from the axial lead of the puncture needle (3), and the thread hooking curved needle (5) is fixedly connected to the curved needle swinging assembly (42);
The curved needle swinging assembly (42) comprises an eccentric wheel (43) and a swinging fork (44) which are connected to a thread hooking driving rod (41), a positioning rod (45) is rotatably connected to the bottom end of the swinging fork (44), the upper end of the swinging fork (44) extends to two sides of the eccentric wheel (43), the eccentric wheel (43) can be pressed on the swinging fork (44) by rotating the eccentric wheel (43) and enables the swinging fork (44) to rotate by taking the positioning rod (45) as the center, and the thread hooking curved needle (5) is fixedly connected to the swinging fork (44);
A curved needle mounting seat (46) is further arranged between the thread hooking curved needle (5) and the swinging fork (44), the curved needle mounting seat (46) is fixedly connected with the swinging fork (44) through a transmission sleeve (47), and the transmission sleeve (47) is sleeved outside the positioning rod (45) and is rotationally connected with the positioning rod (45);
The transmission sleeve (47) is overlapped with the axial lead of the positioning rod (45), a plurality of supporting strips (48) are protruded from the inner surface of the transmission sleeve (47), the supporting strips (48) extend along the radial direction of the transmission sleeve (47), supporting gaps (49) are formed between two adjacent supporting strips (48), and the outer surface of the positioning rod (45) is pressed on the supporting strips (48);
needle protection frame (7) capable of synchronously moving with the thread hooking curved needle (5) is further arranged below the thread hooking curved needle (5), and one end of the needle protection frame (7) extends out of the thread hooking curved needle (5) in the horizontal direction.
2. The chain stitch mechanism of a synchronous flat knitting machine as set forth in claim 1, characterized in that the synchronous drive 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 drive assembly (6) further comprises a synchronous transmission rod (63) positioned between the first transmission gear (61) and the second transmission gear (62) and having both ends respectively meshed with the first transmission gear (61) and the second transmission gear (62).
3. The chain stitch mechanism of synchronous flat knitting machine as set forth in claim 2, characterized in that said first transmission gear (61) and said second transmission gear (62) are both tapered gears, and both ends of said synchronous transmission rod (63) are respectively provided with a tapered gear engaged with said tapered gears.
4. The chain stitch mechanism of synchronous flat sewing machine as set forth 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 driving connecting rod (23) is rotatably connected to the driving wheel (22) and the axis of the driving wheel (22) is not connected with the rotating connection point of the driving wheel (22) through the driving connecting rod (23), the other end of the driving connecting rod (23) is rotatably connected with a mounting sleeve (24), and the puncture needle (3) is connected to the mounting sleeve (24).
5. A synchronous flat seaming machine comprising a machine shell (100), characterized in that the chain stitch mechanism of the synchronous flat seaming machine as claimed in any one of claims 1-4 is arranged in the machine shell (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010566768.0A CN111648048B (en) | 2020-06-19 | 2020-06-19 | Synchronous lockstitch sewing machine chain stitch mechanism and synchronous lockstitch sewing machine having the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010566768.0A CN111648048B (en) | 2020-06-19 | 2020-06-19 | Synchronous lockstitch sewing machine chain stitch mechanism and synchronous lockstitch sewing machine having the same |
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| CN111648048A CN111648048A (en) | 2020-09-11 |
| CN111648048B true CN111648048B (en) | 2025-03-18 |
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