阅读说明：本技术 一种用于碳纤维缝纫机的辅助机构 (Auxiliary mechanism for carbon fiber sewing machine ) 是由 李晶 石伟琪 付璋 杨茜宁 王晴博 钱寿山 于 2019-10-25 设计创作，主要内容包括：一种用于碳纤维缝纫机的辅助机构,包括底板,底板上固定安装有支架装置,支架装置上设有第一传动部、第二传动部、夹线送线装置和拨线装置,第一传动部分别与第二传动部、夹线送线装置和拨线装置传动连接,夹线送线装置和拨线装置之间通过第二传动部传动连接。夹线送线装置与拨线装置之间通过第一传动部、第二传动部的配合使用,使得夹线送线装置、拨线装置与缝纫针相互配合并保持相同的运动周期；保证碳纤维缝纫线在缝纫时处于无张力或极小张力状态,使缝纫针进线时缝纫线处于松弛状态,减小缝纫针对碳纤维线的剪切力作用,提高生产效率。(The utility model provides an auxiliary mechanism for carbon fiber sewing machine, includes the bottom plate, and fixed mounting has a support device on the bottom plate, is equipped with first transmission portion, second transmission portion, double-layered line send the line device and dial the line device on the support device, and first transmission portion is connected with second transmission portion, double-layered line send the line device and dial the line device transmission respectively, presss from both sides the line send the line device and dial and connect through second transmission portion transmission between the line device. The thread clamping and feeding device and the thread shifting device are matched through the first transmission part and the second transmission part, so that the thread clamping and feeding device, the thread shifting device and the sewing needle are matched with each other and keep the same motion period; the carbon fiber sewing thread is ensured to be in a tension-free state or a minimum tension state during sewing, so that the sewing thread is in a loose state during thread feeding of the sewing needle, the shearing force effect of the sewing on the carbon fiber thread is reduced, and the production efficiency is improved.)

1. The utility model provides an auxiliary mechanism for carbon fiber sewing machine, its characterized in that, includes bottom plate (1), fixed mounting has support device (2) on bottom plate (1), be equipped with first transmission portion (3), second transmission portion (4), double-layered line send traditional thread binding putting (5) and dial traditional thread binding putting (6) on support device (2), first transmission portion (3) are connected with second transmission portion (4), double-layered line send traditional thread binding putting (5) and dial traditional thread binding putting (6) transmission respectively, double-layered line send traditional thread binding putting (5) with dial between traditional thread binding putting (6) through second transmission portion (4) transmission is connected.

2. The auxiliary mechanism for the carbon fiber sewing machine as claimed in claim 1, wherein the thread clamping and feeding device (5) comprises a U-shaped bracket (5-1), two open ends of the U-shaped bracket (5-1) are respectively welded with a first cylinder (5-2), and each first cylinder (5-2) is penetrated with a transmission shaft (5-3).

3. Auxiliary mechanism for carbon fiber sewing machines according to claim 2, characterized in that the thread-drawing device (6) comprises a thread-drawing disc (6-1), one end of the thread-drawing disc (6-1) is fixedly connected with a thread-drawing rod (6-2), and the other end of the thread-drawing disc (6-1) is fixedly connected with a set of second cylinders (6-3).

4. The auxiliary mechanism for the carbon fiber sewing machine as claimed in claim 3, wherein the second transmission part (4) comprises a thread-shifting transmission gear (4-1), the thread-shifting transmission gear (4-1) is sleeved on the end of the thread-shifting rod (6-2); the wire shifting transmission gear (4-1) is meshed with a transmission rack (4-2);

the device also comprises a first cam (4-3), wherein the first cam (4-3) is in transmission connection with the transmission rack (4-2); the first cam (4-3) is connected with a first gear (4-4) through a key;

the device also comprises a second gear (4-5), the center of the second gear (4-5) is connected with a shaft (4-6) through a key, and the shaft (4-6) is sleeved with a second cam (4-7);

the second cam (4-7) is in transmission connection with one of the transmission shafts (5-3).

5. The auxiliary mechanism for the carbon fiber sewing machine as claimed in claim 4, wherein the first cam (4-3) is provided with a track groove on a circumferential surface; a connecting column is arranged below the transmission rack (4-2) and moves along the track groove.

6. The auxiliary mechanism for carbon fiber sewing machine according to claim 5, characterized in that the first transmission part (3) comprises a first transmission rod (3-1), a second transmission rod (3-2), a third transmission rod (3-3) and a fourth transmission rod (3-4), the first transmission rod (3-1), the second transmission rod (3-2) and the third transmission rod (3-3) are arranged in parallel with each other, and the fourth transmission rod (3-4) is arranged perpendicular to the first transmission rod (3-1);

the first transmission rod (3-1) is sleeved with a third cam (3-5), a third gear (3-6) and a fourth gear (3-7) through keys, and the third cam (3-5) and the fourth gear (3-7) are respectively arranged at two ends of the first transmission rod (3-1) in a penetrating manner;

the third cam (3-5) is in transmission connection with the wire pulling rod (6-2);

the third gears (3-6) are respectively in meshed transmission with the first gears (4-4) and the second gears (4-5);

the fourth transmission rod (3-4) is sleeved with a fourth cam (3-8), a fifth cam (3-9) and a fifth gear (3-10) through keys, and the fifth cam (3-9) and the fifth gear (3-10) are respectively arranged at two ends of the fourth transmission rod (3-4);

the fourth cam (3-8) is in transmission connection with the second transmission rod (3-2);

the fifth cam (3-9) is in transmission connection with the third transmission rod (3-3);

the fifth gear (3-10) is in meshed transmission with the fourth gear (3-7), and the fifth gear (3-10) is arranged below the fourth gear (3-7).

7. Auxiliary mechanism for carbon fiber sewing machine as claimed in claim 6, characterized in that the bottom of the U-shaped bracket (5-1) is integrally connected with the third transmission rod (3-3) and extends to the third transmission rod (3-2) via the second transmission rod (3-2).

8. Auxiliary mechanism for carbon fiber sewing machines, according to claim 6, characterized in that the end of the first transmission lever (3-1) is connected by a fixed pulley (7) and this pulley (7) is arranged close to the fourth gear (3-7).

9. The auxiliary mechanism for the carbon fiber sewing machine as claimed in claim 6, wherein the support device (2) comprises 7 support frame groups, each support frame group comprises one end of a support rod (2-1) arranged on the bottom plate (1) through a bolt, and a hollow cylinder (2-2) is welded on the other end of the support rod (2-1) in the horizontal direction.

10. The auxiliary mechanism for a carbon fiber sewing machine as claimed in claim 9, wherein 7 of the support frame groups are a first support frame group (2-3), a second support frame group (2-4), a third support frame group (2-5), a fourth support frame group (2-6), a fifth support frame group (2-7), a sixth support frame group (2-8) and a seventh support frame group (2-9), respectively;

the first support frame group (2-3), the second support frame group (2-4) and the third support frame group (2-5) are positioned on the same horizontal straight line;

the fourth support frame group (2-6) and the fifth support frame group (2-7) are positioned on the same horizontal straight line;

the third support frame group (2-5), the fifth support frame group (2-7) and the sixth support frame group (2-8) are positioned on the same vertical straight line;

the wire poking rod (6-2) penetrates through the hollow cylinder of the first support frame group (2-3);

one end of the third transmission rod (3-3) penetrates through the hollow cylinder of the second support frame set (2-4), the other end of the third transmission rod (3-3) penetrates through the hollow cylinder of the third support frame set (2-5), and the third transmission rod (3-3) is in transmission connection with the fifth cam (3-9);

an inverted T-shaped connecting cylinder is sleeved on a hollow cylinder of the fourth support frame group (2-6), and the vertical direction of the inverted T-shaped connecting cylinder is integrally connected with the bottom of the transmission rack (4-2); the end part of the inverted T-shaped connecting cylinder is sleeved with the first cam (4-3);

the second transmission rod (3-2) is L-shaped, one end of the second transmission rod (3-2) is sleeved with the shaft (4-6), and the other end of the second transmission rod (3-2) penetrates through a hollow cylinder of the fifth support frame group (2-7) to be in transmission connection with the fourth cam (3-8);

the first transmission rod (3-1) penetrates through the hollow cylinder of the sixth support frame group (2-8);

the fourth transmission rod (3-4) penetrates through the hollow cylinder of the seventh support frame group (2-9).

Technical Field

The invention belongs to the technical field of auxiliary mechanisms, and relates to an auxiliary mechanism for a carbon fiber sewing machine.

Background

The carbon fiber wire has light weight, high longitudinal tensile strength, high elastic modulus and small thermal expansion coefficient, but has poor transverse shear resistance. The carbon fiber thread is easy to break under the action of the thread feeding shearing force of the sewing needle in the sewing process, and the production efficiency is seriously influenced. Aiming at the problem of breakage of the sewing thread, scholars in the field conduct related research on the performance of the carbon fiber, such as improvement of sewing quality through a stitch relation, improvement of tensile strength of the sewing thread through a chemical method and the like; the problem of thread breakage of the carbon fiber thread due to shearing force is not solved by improving a mechanical mechanism of the sewing machine. Therefore, combine ordinary industrial sewing machine characteristics, this application has designed the sewing machine complementary unit who is fit for carbon fiber sewing thread.

Disclosure of Invention

The invention aims to provide an auxiliary mechanism for a carbon fiber sewing machine, which can relax the tension of sewing threads and reduce the thread breakage rate.

The technical scheme adopted by the invention is as follows: the utility model provides an auxiliary mechanism for carbon fiber sewing machine, includes the bottom plate, and fixed mounting has a support device on the bottom plate, is equipped with first transmission portion, second transmission portion, double-layered line send the line device and dial the line device on the support device, and first transmission portion is connected with second transmission portion, double-layered line send the line device and dial the line device transmission respectively, presss from both sides the line send the line device and dial and connect through second transmission portion transmission between the line device.

The present invention is also characterized in that,

the wire clamping and feeding device comprises a U-shaped support, two open ends of the U-shaped support are respectively welded with a first cylinder, and a transmission shaft penetrates through each first cylinder.

The wire poking device comprises a wire poking disc, one end of the wire poking disc is fixedly connected with a wire poking rod, and the other end of the wire poking disc is fixedly connected with a group of second cylinders.

The second transmission part comprises a wire shifting transmission gear which is sleeved at the end part of the wire shifting rod; the wire shifting transmission gear is meshed with a transmission rack;

the first cam is in transmission connection with the transmission rack; the first cam is connected with a first gear through a key;

the center of the second gear is connected with a shaft through a key, and a second cam is arranged on the shaft sleeve;

the second cam is in transmission connection with one of the transmission shafts.

The circumferential surface of the first cam is provided with a track groove; and a connecting column is arranged below the transmission rack and moves along the track groove.

The first transmission part comprises a first transmission rod, a second transmission rod, a third transmission rod and a fourth transmission rod, the first transmission rod, the second transmission rod and the third transmission rod are arranged in parallel, and the fourth transmission rod is perpendicular to the first transmission rod;

the first transmission rod is sleeved with a third cam, a third gear and a fourth gear through keys, and the third cam and the fourth gear are respectively arranged at two ends of the first transmission rod in a penetrating manner;

the third cam is in transmission connection with the wire shifting rod;

the third gear is in meshing transmission with the first gear and the second gear respectively;

the fourth transmission rod is sleeved with a fourth cam, a fifth cam and a fifth gear through keys, and the fifth cam and the fifth gear are respectively arranged at two end parts of the fourth transmission rod;

the fourth cam is in transmission connection with the second transmission rod;

the fifth cam is in transmission connection with the third transmission rod;

the fifth gear is in meshed transmission with the fourth gear, and the fifth gear is arranged below the fourth gear.

The bottom of the U-shaped support is integrally connected with the third transmission rod and extends to the third transmission rod to be integrally connected through the second transmission rod.

The end of the first transmission rod is fixedly connected with a belt pulley, and the belt pulley is arranged close to the fourth gear.

The support device comprises 7 support frame groups, each support frame group comprises one end of a support rod arranged on the bottom plate through a bolt, and a hollow cylinder is welded at the other end of the support rod in the horizontal direction.

The 7 support frame groups are respectively a first support frame group, a second support frame group, a third support frame group, a fourth support frame group, a fifth support frame group, a sixth support frame group and a seventh support frame group;

the first support frame group, the second support frame group and the third support frame group are positioned on the same horizontal straight line;

the fourth support frame group and the fifth support frame group are positioned on the same horizontal straight line;

the third support frame group, the fifth support frame group and the sixth support frame group are positioned on the same vertical straight line;

the wire poking rod penetrates through the hollow cylinder of the first support frame group;

one end of the third transmission rod penetrates through the hollow cylinder of the second support frame group, the other end of the third transmission rod penetrates through the hollow cylinder of the third support frame group, and the third transmission rod is in transmission connection with the fifth cam;

a hollow cylinder of the fourth support frame group is sleeved with an inverted T-shaped connecting cylinder, and the vertical direction of the inverted T-shaped connecting cylinder is integrally connected with the bottom of the transmission rack; the end part of the inverted T-shaped connecting cylinder is sleeved with the first cam;

the second transmission rod is L-shaped, one end of the second transmission rod is sleeved with the shaft, and the other end of the second transmission rod penetrates through the hollow cylinder of the fifth support frame group to be in transmission connection with the fourth cam;

the first transmission rod penetrates through the hollow cylinder of the sixth support frame group;

the fourth transmission rod passes through the hollow cylinder of the seventh support frame group.

The invention has the beneficial effects that: an auxiliary mechanism for a carbon fiber sewing machine is characterized in that a thread clamping and feeding device and a thread shifting device are matched through a first transmission part and a second transmission part, so that the thread clamping and feeding device, the thread shifting device and a sewing needle are matched with each other and keep the same motion cycle; the carbon fiber sewing thread is ensured to be in a tension-free state or a minimum tension state during sewing, so that the sewing thread is in a loose state during thread feeding of the sewing needle, the shearing force effect of the sewing on the carbon fiber thread is reduced, and the production efficiency is improved. The transmission mechanism of the auxiliary mechanism for the carbon fiber sewing machine adopts various gears for transmission, can better realize the rotation of the device, and has simple structure and high transmission efficiency.

Drawings

FIG. 1 is a schematic structural view of an auxiliary mechanism for a carbon fiber sewing machine;

FIG. 2 is a schematic structural view of a thread clamping and feeding device for a carbon fiber sewing machine;

FIG. 3 is a schematic view of a horizontal reciprocating motion of a thread clamping process of a thread clamping and feeding device for a carbon fiber sewing machine;

FIG. 4 is a schematic horizontal reciprocating motion of a thread clamping and feeding device for a carbon fiber sewing machine during the non-thread clamping process;

FIG. 5 is a schematic thread clamping view of a thread clamping and feeding device for a carbon fiber sewing machine;

FIG. 6 is a schematic view of a thread clamping and feeding device for a carbon fiber sewing machine without clamping thread;

FIG. 7 is a schematic structural view of a thread take-up device for a carbon fiber sewing machine;

fig. 8 is a plan view of a thread take-up device for a carbon fiber sewing machine.

In the figure, 1, a bottom plate, 2, a bracket device, 2-1, a support rod, 2-2, a hollow cylinder, 2-3, a first support frame group, 2-4, a second support frame group, 2-5, a third support frame group, 2-6, a fourth support frame group, 2-7, a fifth support frame group, 2-8, a sixth support frame group, 2-9, a seventh support frame group, 3, a first transmission part, 3-1, a first transmission rod, 3-2, a second transmission rod, 3-3, a third transmission rod, 3-4, a fourth transmission rod, 3-5, a third cam, 3-6, a third gear, 3-7, a fourth gear, 3-8, a fourth cam, 3-9, a fifth cam, 3-10, a fifth gear, 4, a second transmission part, 4-1 of a wire shifting transmission gear, 4-2 of a transmission rack, 4-3 of a first cam, 4-4 of a first gear, 4-5 of a second gear, 4-6 of a shaft, 4-7 of a second cam, 5 of a wire clamping and feeding device, 5-1 of a U-shaped bracket, 5-2 of a first cylinder, 5-3 of a transmission shaft, 6 of a wire shifting device, 6-1 of a wire shifting disc, 6-2 of a wire shifting rod, 6-3 of a second cylinder and 7 of a belt pulley.

Detailed Description

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

An auxiliary mechanism for a carbon fiber sewing machine is shown in figure 1 and comprises a bottom plate 1, wherein a support device 2 is fixedly mounted on the bottom plate 1, a first transmission part 3, a second transmission part 4, a thread clamping and feeding device 5 and a thread shifting device 6 are arranged on the support device 2, the first transmission part 3 is in transmission connection with the second transmission part 4, the thread clamping and feeding device 5 and the thread shifting device 6 respectively, and the thread clamping and feeding device 5 and the thread shifting device 6 are in transmission connection through the second transmission part 4. The first transmission part 3 drives the second transmission part 4, the wire clamping and feeding device 5 and the wire shifting device 6 to move, and the second transmission part 4 drives the wire clamping and feeding device 5 and the wire shifting device 6 to move synchronously.

As shown in fig. 1 and 2, the wire clamping and feeding device 5 comprises a U-shaped bracket 5-1, two open ends of the U-shaped bracket 5-1 are respectively welded with a first cylinder 5-2, and a transmission shaft 5-3 is sleeved on each first cylinder 5-2.

As shown in fig. 1, 7 and 8, the wire-pulling device 6 comprises a wire-pulling disc 6-1, one end of the wire-pulling disc 6-1 is fixedly connected with a wire-pulling rod 6-2, and the other end of the wire-pulling disc 6-1 is fixedly connected with a group of second cylinders 6-3; the second cylinder 6-3 can reduce friction with the thread when the thread is being pulled.

As shown in fig. 1, the second transmission part 4 comprises a wire-shifting transmission gear 4-1 sleeved at the end part of a wire-shifting rod 6-2, and the wire-shifting transmission gear 4-1 is engaged with a transmission rack 4-2;

also comprises a first cam 4-3 which is in transmission connection with the transmission rack 4-2, the first cam 4-3 is connected with a first gear 4-4 through a key,

the device also comprises a second gear 4-5, the center of the second gear 4-5 is connected with a shaft 4-6 through a key, and the shaft 4-6 is sleeved with a second cam 4-7;

the second cam 4-7 is in transmission connection with one transmission shaft 5-3 of the wire clamping and feeding device 5 to form a cam mechanism;

the other transmission shaft 5-3 is fixedly welded on the corresponding first cylinder 5-2.

As shown in fig. 1, the circumferential surface of the first cam 4-3 is provided with a track groove; a connecting column is arranged below the transmission rack 4-2 and moves along the track groove.

The first transmission part 3 comprises a first transmission rod 3-1, a second transmission rod 3-2, a third transmission rod 3-3 and a fourth transmission rod 3-4, the first transmission rod 3-1, the second transmission rod 3-2 and the third transmission rod 3-3 are arranged in parallel, and the fourth transmission rod 3-4 is perpendicular to the first transmission rod 3-1, the second transmission rod 3-2 and the third transmission rod 3-3;

the first transmission rod 3-1 is sleeved with a third cam 3-5, a third gear 3-6 and a fourth gear 3-7 through keys, and the third cam 3-5 and the fourth gear 3-7 are respectively arranged at two ends of the first transmission rod 3-1 in a penetrating manner;

the third cam 3-5 is in transmission connection with the wire shifting rod 6-2 to form a pair of cam mechanisms;

the third gear 3-6 is respectively in meshed transmission with the first gear 4-4 and the second gear 4-5;

the fourth transmission rod 3-4 is sleeved with a fourth cam 3-8, a fifth cam 3-9 and a fifth gear 3-10 through keys, and the fifth cam 3-9 and the fifth gear 3-10 are respectively arranged at two end parts of the fourth transmission rod 3-4;

the fourth cam 3-8 is in transmission connection with the second transmission rod 3-2, so that a pair of cam mechanisms is formed;

the fifth cam 3-9 is in transmission connection with the third transmission rod 3-3, namely a secondary cam mechanism is formed.

The fifth gear 3-10 is in mesh transmission with the fourth gear 3-7, and the fifth gear 3-10 is arranged below the fourth gear 3-7.

The bottom of the U-shaped bracket 5-1 is welded with the third transmission rod 3-3, extends to the third transmission rod 3-2 through the second transmission rod 3-2 and is welded with the third transmission rod 3-2.

The end of the first transmission rod 3-1 is connected with a belt pulley 7 by a fixed pin, and the belt pulley 7 is arranged near the fourth gear 3-7.

The support device 2 comprises 7 support frame groups, each support frame group comprises one end of a support rod 2-1 arranged on the bottom plate 1 through a bolt, and a hollow cylinder 2-2 is welded on the other end of the support rod 2-1 in the horizontal direction.

The 7 support frame groups are respectively a first support frame group 2-3, a second support frame group 2-4, a third support frame group 2-5, a fourth support frame group 2-6, a fifth support frame group 2-7, a sixth support frame group 2-8 and a seventh support frame group 2-9;

the first support frame group 2-3, the second support frame group 2-4 and the third support frame group 2-5 are positioned on the same horizontal straight line;

the fourth support frame group 2-6 and the fifth support frame group 2-7 are positioned on the same horizontal straight line;

the third support frame group 2-5, the fifth support frame group 2-7 and the sixth support frame group 2-8 are positioned on the same vertical straight line;

the hollow cylinder of the first support frame group 2-3 is sleeved with the wire shifting rod 6-2 in a penetrating way, and the wire shifting rod 6-2 can rotate and move back and forth in the hollow cylinder.

The hollow cylinder of the second support frame group 2-4 is sleeved with one end of a third transmission rod 3-3, the hollow cylinder of the third support frame group 2-5 is sleeved with the other end of the third transmission rod 3-3, and the third transmission rod 3-3 extends to be in transmission connection with a fifth cam 3-9; the third transmission rod 3-3 can reciprocate horizontally in the hollow cylinder of the second support frame group 2-4 and the hollow cylinder of the third support frame group 2-5 under the rotation of the fifth convex 2-3 wheel 3-9.

An inverted T-shaped connecting cylinder is sleeved on a hollow cylinder of the fourth support frame group 2-6, and the vertical direction of the inverted T-shaped connecting cylinder is welded with the bottom of the transmission rack 4-2; the end part of the inverted T-shaped connecting cylinder is sleeved with the first cam 4-3.

The second transmission rod 3-2 is L-shaped, one end of the second transmission rod 3-2 is sleeved with the shaft 4-6, and the other end of the second transmission rod 3-2 penetrates through the hollow cylinder of the fifth support frame group 2-7 to be in transmission connection with the fourth cam 3-8; the bottom of the U-shaped bracket 5-1 of the wire clamping and feeding device 5 is welded with the third transmission rod 3-3 and the second transmission rod 3-2; when the fourth cam 3-8 rotates, the second transmission rod 3-2 horizontally reciprocates, and the second transmission rod 3-2 is sleeved on the shaft 4-6 of the second transmission part 4, namely, the wire clamping and feeding device 5 can synchronously move with the first transmission part 3 and the second transmission part 4.

The hollow cylinder of the sixth support frame group 2-8 is sleeved with a first transmission rod 3-1, a part close to one end of the hollow cylinder of the sixth support frame group 2-8 is a third gear 3-6, and the other end part is a fourth gear 3-7.

A fourth transmission rod 3-4 penetrates through the hollow cylinder of the seventh support frame group 2-9; one end part of the hollow cylinders of the seventh support frame group 2-9 is a fifth gear 3-10, and the other end part of the hollow cylinders of the seventh support frame group 2-9 is a fourth cam 3-8 and a fifth cam 3-9 in sequence from near to far.

The motion process of the wire clamping and feeding device 5 is as follows:

the wire clamping and feeding device 5 reciprocates in the horizontal direction:

as shown in fig. 3 and 4, the belt pulley 7 rotates, the fourth gear 3-7 rotates, the fifth gear 3-10 engaged with the fourth gear 3-7 rotates, the fourth transmission rod 3-4 rotates together with the fifth gear 3-10, the fourth cam 3-8 and the fifth cam 3-9 rotate along with the fourth gear 3-10, the fourth cam 3-8 rotates, i.e., the second transmission rod 3-2 reciprocates horizontally, the fifth cam 3-9 rotates, i.e., the third transmission rod 3-3 reciprocates horizontally, and at this time, the wire clamping and feeding device 5 arranged on the second transmission rod 3-2 and the third transmission rod 3-3 also reciprocates horizontally along with the fifth cam 3-8;

the wire clamping and non-wire clamping process of the wire clamping and feeding device 5 comprises the following steps:

as shown in fig. 5, the belt pulley 7 rotates, the third gear 3-6 rotates, the second gear 4-5 meshed with the third gear 3-6 rotates, the second gear 4-5 drives the second cam 4-7 connected through the shaft 4-6 to rotate, when the second cam 4-7 rotates to a remote position, the transmission shaft 5-3 close to the second cam 4-7 moves towards the other fixed transmission shaft 5-3, and a clamping line between the two transmission shafts 5-3 is realized;

as shown in FIG. 6, when the second cam 4-7 is rotated to the near rest position, the transmission shaft 5-3 near the second cam 4-7 moves towards the other fixed transmission shaft 5-3 without being acted, and the two transmission shafts 5-3 are in the non-clamped state.

The process of reducing the shearing force of the carbon fiber wire by the wire clamping and feeding device 5 is as follows:

as shown in fig. 3 to 6, the thread releasing process of the thread clamping and feeding device 5 can reduce the shearing action of the needle hole on the carbon fiber thread, specifically: the wire clamping and feeding device 5 is driven by a second cam 4-7, a fourth cam 3-8 and a fifth cam 3-9. When a transmission shaft 5-3 of the wire clamping and feeding device 5 clamps a wire, the fourth cam 3-8 and the fifth cam 3-9 synchronously rotate from a near rest position to a far rest position, and the second transmission rod 3-2 and the third transmission rod 3-3 which are matched with the transmission shaft transmit the wire clamping and feeding device 5 clamping the wire to a certain distance; so that the thread is in a relaxed state when the needle is inserted;

when the transmission shaft 5-3 of the wire clamping and feeding device 5 does not clamp the wire, the fourth cam 3-8 and the fifth cam 3-9 synchronously rotate from a far rest position to a near rest position, and the second transmission rod 3-2 and the third transmission rod 3-3 which are matched with the fourth cam and the fifth cam for transmission send the wire clamping and feeding device 5 without clamping the wire to an initial state.

The movement process of the wire poking device 6 is as follows:

as shown in fig. 7 and 8, the pulley 7 rotates, the third cam 3-5 rotates, and as the wire-shifting rod 6-2 of the wire-shifting device 6 is in transmission connection with the third cam 3-5 to form a pair of cam mechanisms, the wire-shifting rod 6-2 reciprocates in the vertical direction under the rotation of the third cam 3-5, i.e. the wire-shifting device 6 reciprocates in the vertical direction;

the belt pulley 7 rotates, the third gear 3-6 rotates, the first gear 4-4 meshed with the third gear rotates, the first cam 4-3 sleeved with the first gear 4-4 through a key rotates along with the first gear, at the moment, the transmission rack 4-2 moving along the track groove formed in the circumferential surface of the first cam 4-3 also moves, and the wire shifting transmission gear 4-1 meshed with the transmission rack 4-2 moves on the transmission rack 4-2, namely the wire shifting transmission gear 4-1 and the transmission rack 4-2 are in matched reciprocating motion; the wire shifting transmission gear 4-1 drives the wire shifting wheel 6-2 to rotate, and the rotating amplitude of the wire shifting wheel 6-2 corresponds to the length of the transmission rack 4-2; namely, the first cam 4-3 realizes the rotation of the thread shifting device 6, and prevents the thread from winding in the sewing process.

The invention relates to a working process of an auxiliary mechanism for a carbon fiber sewing machine, which comprises the following steps:

the auxiliary mechanism is placed below the head of the sewing machine, the thread pulling device 6 of the auxiliary mechanism is arranged close to the sewing needle, and in the descending process of the needle, the thread pulling device 6 moves forwards, so that the right cylinder of the 6-3 second cylinder is positioned at the lower end of the sewing thread, and the left cylinder is positioned at the upper end of the sewing thread and is wound in an s shape. Then when the needle stitches, the thread-pulling device 6 rotates 90 degrees anticlockwise to pull the sewing thread, when the sewing is finished, the thread-pulling device 6 retracts backwards, and 6-3 the second cylinder is not wound with the thread. The thread-pulling device 6 works repeatedly to sew in cooperation with the sewing needle.

A belt is wound on the belt pulley 7 and a motor of the sewing machine, the motor is started, the belt pulley 7 rotates under the driving of the belt, and at the moment, the first transmission rod 3-1 rotates, namely, the third cam 3-5, the third gear 3-6 and the fourth gear 3-7 which are connected with the first transmission rod 3-1 through keys also rotate;

the fourth gear 3-7 rotates to drive the fifth gear 3-10 to rotate, namely the fourth transmission rod 3-4 and the fifth gear 3-10 rotate simultaneously, a fourth cam 3-8 and a fifth cam 3-9 on the fourth transmission rod 3-4 rotate coaxially, the fourth cam 3-8 is matched with the second transmission rod 3-2 in transmission, and the fifth cam 3-9 is matched with the third transmission rod 3-3 in transmission to realize reciprocating motion in the horizontal direction, namely the wire clamping and wire feeding device 5 integrally arranged on the second transmission rod 3-2 and the third transmission rod 3-3 reciprocates in the horizontal direction;

the third gear 3-6 rotates, the second gear 4-5 meshed with the third gear also rotates along with the third gear, the second gear 4-5 drives the second cam 4-7 to rotate, one transmission shaft 5-3 in the wire clamping and feeding device 5 reciprocates in the vertical direction, namely the wire clamping and feeding device 5 reciprocates back and forth, and the wire clamping and feeding device 5 realizes the state of clamping wires or not clamping wires; the device is matched with the thread clamping and feeding device 5 in the horizontal direction to realize the processes of clamping and feeding thread, releasing thread and returning thread, and clamping and feeding thread, so that the carbon fiber thread is in a loose state when the sewing needle is inserted, and the shearing action of the needle hole on the thread is greatly reduced.

The third cam 3-5 rotates to push the wire shifting rod 6-2 of the wire shifting device 6 to move back and forth along the track of the third cam 3-5 in the vertical direction, namely the wire shifting device 6 moves back and forth;

the third gear 3-6 rotates, and the first gear 4-4 meshed with the third gear also rotates along with the third gear; the first gear 4-4 rotates to drive the first cam 4-3 to rotate, and the first cam 4-3 is matched with the transmission rack 4-2 to realize reciprocating motion, namely the motion of the transmission rack 4-2 enables the wire shifting transmission gear 4-1 to rotate in a reciprocating mode, namely the wire shifting device 6 is driven to realize reciprocating rotation, so that the wire shifting device 6 realizes a wire releasing function; the back and forth movement in the vertical direction and the reciprocating movement in the horizontal direction of the wire pulling device 6 are combined to realize the wire pulling-paying off-pulling process.

The invention relates to an auxiliary mechanism for a carbon fiber sewing machine, wherein a thread clamping and feeding device 5 and a thread shifting device 6 are matched through a first transmission part 3 and a second transmission part 4, so that the thread clamping and feeding device 5, the thread shifting device 6 and a sewing needle are matched with each other and keep the same motion period; the carbon fiber sewing thread is ensured to be in a tension-free state or a minimum tension state during sewing, so that the sewing thread is in a loose state during thread feeding of the sewing needle, the shearing force effect of the sewing on the carbon fiber thread is reduced, and the production efficiency is improved. Wherein the fourth cam 3-8 and the fifth cam 3-9 realize the reciprocating motion of the wire clamping and feeding device 5 in the horizontal direction; the third cam 3-5 realizes the reciprocating motion in the vertical direction of the wire poking device 6, namely the back and forth reciprocating motion; the first cam 4-3 realizes the rotation function of the wire-shifting device 6. The transmission mechanism of the auxiliary mechanism for the carbon fiber sewing machine adopts multiple gears for transmission, can better realize device rotation, and has the advantages of simple structure and high transmission efficiency.