阅读说明：本技术 一种自动剪线且自动清理绒线的缝纫机剪线机构 (Automatic trimming and automatic clearing thread trimming mechanism of sewing machine ) 是由 金亚东 冷伟峰 于 2020-06-18 设计创作，主要内容包括：本发明涉及缝纫机设备技术领域,且公开了一种自动剪线且自动清理绒线的缝纫机剪线机构,包括压脚杆,所述压脚杆的内侧固定连接有齿槽,所述一号齿槽的表面啮合连接有一号传动齿轮,所述一号传动齿轮的圆心处固定连接有二号传动齿轮,所述二号传动齿轮的侧面啮合连接有三号传动齿轮。通过移动筒向下移动时,空气仓内上部的空气减少压强增大,所以空气经过进气孔进入空气仓上部内,当移动筒升起时,上部压强增大空气经过移动筒上方的进气孔进入移动筒内,移动筒内的空气压强增大,经过移动筒底部的出气孔排出外界,从而达到了能够自动将工作台上的碎屑吹走,防止碎屑进入缝纫机内部与对其他元件造成损伤。(The invention relates to the technical field of sewing machine equipment, and discloses a sewing machine thread trimming mechanism capable of automatically trimming threads and automatically cleaning knitting wool. When the movable cylinder moves downwards, air at the upper part in the air bin reduces the pressure intensity and increases, so that air enters the upper part of the air bin through the air inlet hole, when the movable cylinder rises, the air with the increased pressure intensity enters the movable cylinder through the air inlet hole above the movable cylinder, the air pressure intensity in the movable cylinder increases, and the air is discharged outside through the air outlet hole at the bottom of the movable cylinder, so that the chips on the workbench can be automatically blown away, and the chips are prevented from entering the inside of the sewing machine and damaging other elements.)

1. The utility model provides an automatic trimming and automatic sewing machine thread trimming mechanism who clears up knitting wool, includes presser bar (1), its characterized in that: the inner side of the presser foot rod (1) is fixedly connected with a first tooth groove (2), the surface of the first tooth groove (2) is connected with a first transmission gear (3) in a meshed mode, the circle center of the first transmission gear (3) is fixedly connected with a second transmission gear (4), the side face of the second transmission gear (4) is connected with a third transmission gear (5) in a meshed mode, one side, far away from the second transmission gear (4), of the third transmission gear (5) is fixedly connected with a fourth transmission gear (6), the circle center of the fourth transmission gear (6) is fixedly connected with a fifth transmission gear (7), the surface of the fifth transmission gear (7) is connected with a second tooth groove (8) in a meshed mode, the surface of the presser foot rod (1) is movably connected with an installation frame (9), the outer side of the installation frame (9) is fixedly connected with an air bin (10), and the inner portion of the air bin (10, the scissors are characterized in that an air inlet hole (12) is fixedly connected to the top of the movable barrel (11), an air outlet hole (13) is fixedly connected to the lower end of the movable barrel (11), a movable connecting rod (14) is fixedly connected to the inner side of the movable barrel (11), a sliding block (15) is fixedly connected to the lower end of the movable connecting rod (14), a telescopic rod (16) is fixedly connected to the side face of the sliding block (15), and scissors (17) are fixedly connected to the top end of the telescopic rod (16).

2. The thread trimming mechanism of a sewing machine for trimming thread automatically and cleaning pile thread automatically according to claim 1, wherein: the lower end of the presser bar (1) is fixedly connected with a presser foot, the side wall of the presser bar (1) is provided with a through hole, the inner side of the through hole is fixedly connected with a first tooth groove (2), the length of the through hole is greater than the maximum lifting height of the presser bar (1), and the diameter of the through hole is greater than the diameter of a first transmission gear (3).

3. The thread trimming mechanism of a sewing machine for trimming thread automatically and cleaning pile thread automatically according to claim 1, wherein: the second transmission gear (4) and the third transmission gear (5) are arranged at 90 degrees, the side faces of the second transmission gear and the third transmission gear are meshed with each other, the fourth transmission gear (6) and the third transmission gear (5) are arranged at 90 degrees, the side faces of the fourth transmission gear and the fourth transmission gear are meshed with each other, and the circle centers of the second transmission gear (4) and the fourth transmission gear (6) are on the same horizontal line.

4. The thread trimming mechanism of a sewing machine for trimming thread automatically and cleaning pile thread automatically according to claim 1, wherein: open the both sides of mounting bracket (9) has the through-hole, and the diameter of through-hole is greater than the diameter of No. two drive gear (4), open the side of a removal section of thick bamboo (11) has the activity through-hole, and No. two tooth's socket (8) of lateral wall fixedly connected with of through-hole, the diameter of through-hole is greater than the diameter of No. five drive gear (7).

5. The thread trimming mechanism of a sewing machine for trimming thread automatically and cleaning pile thread automatically according to claim 1, wherein: the center of a circle of the air bin (10) is provided with a through hole, the diameter of the through hole is the same as that of the mounting rack (9), the mounting rack (9) is sleeved on the surface of the air bin (10), and the joint of the air bin and the mounting rack is coated with glue.

6. The thread trimming mechanism of a sewing machine for trimming thread automatically and cleaning pile thread automatically according to claim 1, wherein: the top end of the air bin (10) is fixedly connected with an air inlet hole (12), the air inlet hole (12) is a one-way air valve, an air inlet end is arranged in the air, an air outlet end is arranged in the air bin (10), the air outlet hole (13) is a one-way air valve, the air inlet end is arranged in the movable barrel (11), and the air outlet end is arranged outside the movable barrel (11).

7. The thread trimming mechanism of a sewing machine for trimming thread automatically and cleaning pile thread automatically according to claim 1, wherein: the bottom fixedly connected with slide rail of air storehouse (10), the width of slide rail is greater than the width of slider (15), it has many poles to rise telescopic link (16), and articulated each other, the top fixedly connected with scissors (17) of telescopic link (16), be 90 degrees between scissors (17) and telescopic link (16) and put.

Technical Field

The invention relates to the technical field of sewing machine equipment, in particular to a sewing machine thread trimming mechanism capable of automatically trimming threads and automatically cleaning knitting wool.

Background

The sewing machine is a machine which forms one or more stitches on a sewing material by using one or more sewing threads to make the cloth materials sewn together, and a thread cutting device of the sewing machine is a device which automatically cuts after working each time.

But the sewing machine thread trimming device on the market now makes and cuts out the line through using multiple electric elements, has increased the cost of manufacturing, and can't accomplish the function of automatic cutting, needs personnel to control solitary control button, increases the time of work and has reduced work efficiency, and can't clear up debris such as surplus thread end piece on the workstation after cutting the completion, causes the easy damage of equipment.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the sewing machine thread trimming mechanism capable of trimming threads automatically and cleaning knitting wool automatically, which has the advantages that the trimming work can be automatically performed when the sewing is finished, the device has multiple common parts, the manufacturing cost is saved, the production efficiency is improved, thread end scraps on a workbench can be cleaned after the thread trimming is finished, and the problems that the thread trimming device of the sewing machine in the market enables the threads to be trimmed by using multiple electrical elements, the manufacturing cost is increased, the automatic trimming function cannot be realized, a person is required to operate an independent control button, the working time is increased, the working efficiency is reduced, and the device is easy to damage due to the fact that sundries such as residual thread end scraps on the workbench cannot be cleaned after the thread trimming is finished are solved.

(II) technical scheme

In order to realize the purposes that the cutting work can be automatically carried out when the sewing is finished, the device has multiple common parts, the manufacturing cost is saved, the production efficiency is improved, and the thread end scraps on the workbench can be cleaned after the thread cutting is finished, the invention provides the following technical scheme: a thread trimming mechanism of a sewing machine capable of trimming threads automatically and cleaning knitting wool automatically comprises a presser bar, wherein a first tooth groove is fixedly connected to the inner side of the presser bar, a first transmission gear is connected to the surface of the first tooth groove in a meshed manner, a second transmission gear is fixedly connected to the circle center of the first transmission gear, a third transmission gear is connected to the side surface of the second transmission gear in a meshed manner, a fourth transmission gear is fixedly connected to one side of the third transmission gear, which is far away from the second transmission gear, a fifth transmission gear is fixedly connected to the circle center of the fourth transmission gear, a second tooth groove is connected to the surface of the fifth transmission gear in a meshed manner, a mounting frame is movably connected to the surface of the presser bar, an air bin is fixedly connected to the outer side of the mounting frame, a moving barrel is movably connected to the inner part of the air bin, and an, the lower extreme fixedly connected with venthole of a removal section of thick bamboo, the inboard fixedly connected with movable connecting rod of a removal section of thick bamboo, the lower extreme fixedly connected with slider of movable connecting rod, the side fixedly connected with telescopic link of slider, the top fixedly connected with scissors of telescopic link.

Preferably, the lower end of the presser bar is fixedly connected with a presser foot, the side wall of the presser bar is provided with a through hole, the inner side of the through hole is fixedly connected with a first tooth groove, the length of the through hole is greater than the maximum lifting height of the presser bar, and the diameter of the through hole is greater than the diameter of the first transmission gear.

Preferably, the second transmission gear and the third transmission gear are arranged at 90 degrees, the side faces of the second transmission gear and the side faces of the third transmission gear are meshed with each other, the fourth transmission gear and the third transmission gear are arranged at 90 degrees, the side faces of the fourth transmission gear and the side faces of the third transmission gear are meshed with each other, and the circle centers of the second transmission gear and the fourth transmission gear are on the same horizontal line.

Preferably, the through holes are formed in the two sides of the mounting frame, the diameter of each through hole is larger than that of the corresponding second transmission gear, the side face of the moving cylinder is provided with a movable through hole, the side wall of each through hole is fixedly connected with a tooth socket II, and the diameter of each through hole is larger than that of the corresponding fifth transmission gear.

Preferably, a through hole is formed in the circle center of the air bin, the diameter of the through hole is the same as that of the mounting frame, the mounting frame is sleeved on the surface of the air bin, and glue is coated at the joint of the mounting frame and the air bin.

Preferably, the top end of the air bin is fixedly connected with an air inlet, the air inlet is a one-way air valve, the air inlet end is in the air, the air outlet end is in the air bin, the air outlet is a one-way air valve, the air inlet end is in the movable barrel, and the air outlet end is outside the movable barrel.

Preferably, the bottom fixedly connected with slide rail of air storehouse, the width of slide rail is greater than the width of slider, it has many poles to rise the telescopic link to constitute, and articulated each other, the top fixedly connected with scissors of telescopic link, is 90 degrees between scissors and the telescopic link and puts.

(III) advantageous effects

Compared with the prior art, the invention provides the sewing machine thread trimming mechanism capable of automatically trimming and cleaning the knitting wool, which has the following beneficial effects:

1. the thread trimming mechanism of the sewing machine for automatically trimming and cleaning the knitting wool moves upwards through the presser bar, the first tooth socket is fixedly connected on the presser bar, the first tooth socket is meshed and connected with the first transmission gear, the first transmission gear rotates coaxially with the second transmission gear, the second transmission gear is meshed and connected with the third transmission gear, the second transmission gear is arranged at 90 degrees with the third transmission gear, the third transmission gear is meshed and connected with the fourth transmission gear, and the third transmission gear is arranged at 90 degrees with the fourth transmission gear, so that the rotation directions of the second transmission gear and the fourth transmission gear are opposite, the fourth transmission gear rotates coaxially with the fifth transmission gear, the fifth transmission gear is meshed and connected with the second tooth socket, so that the second tooth socket starts to move downwards, the second tooth socket is fixedly connected on the moving cylinder, so that the moving cylinder starts to move downwards, the movable connecting rod is fixedly connected on the moving cylinder, therefore, the movable connecting rod pushes the sliding block to move, the number of the movable connecting rods is two, the number of the sliding blocks is also two, the movable connecting rod pushes the sliding blocks to move in opposite directions, the telescopic rods are fixedly connected onto the sliding blocks, and the scissors are fixedly connected onto the top ends of the telescopic rods.

2. This automatic trimming and automatic sewing machine trimming mechanism who clears up knitting wool, when moving down through the removal section of thick bamboo, the air reduction pressure increase of upper portion in the air storehouse, so the air gets into in the air storehouse upper portion through the inlet port, when the removal section of thick bamboo rises, upper portion pressure increase air gets into in the removal section of thick bamboo through the inlet port of removal section of thick bamboo top, the air pressure increase in the removal section of thick bamboo, the venthole through the removal section of thick bamboo bottom discharges the external world, the air current of air can blow away the piece on the workstation this moment, thereby reached and blown away the piece on the workstation automatically, prevent that the piece from getting into sewing machine inside and causing the damage to other components, also prevent to influence the effect of making up when making up next time.

Drawings

FIG. 1 is a schematic view of the connection between a presser bar and a mounting frame according to the present invention;

FIG. 2 is a schematic view of the transmission of the present invention;

FIG. 3 is a front cross-sectional structural view of the thread trimming mechanism of the present invention;

FIG. 4 is a schematic diagram of a cutting device according to the present invention;

fig. 5 is a cross-sectional structural schematic view of the thread trimming mechanism of the present invention.

In the figure: 1. a presser bar; 2. a first tooth groove; 3. a first transmission gear; 4. a second transmission gear; 5. a third transmission gear; 6. a fourth transmission gear; 7. a fifth transmission gear; 8. a second gullet; 9. a mounting frame; 10. an air bin; 11. moving the drum; 12. an air inlet; 13. an air outlet; 14. a movable connecting rod; 15. a slider; 16. a telescopic rod; 17. a pair of scissors.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a thread trimming mechanism of a sewing machine capable of trimming thread and cleaning knitting wool automatically comprises a presser bar 1, a presser foot is fixedly connected to the lower end of the presser bar 1, a through hole is formed in the side wall of the presser bar 1, a first tooth space 2 is fixedly connected to the inner side of the through hole, the length of the through hole is greater than the maximum lifting height of the presser bar 1, a first tooth space 2 is fixedly connected to the inner side of the presser bar 1 with the diameter greater than that of a first transmission gear 3, the surface of the first tooth space 2 is engaged with the first transmission gear 3, a second transmission gear 4 is fixedly connected to the center of the first transmission gear 3, the second transmission gear 4 and a third transmission gear 5 are arranged at 90 degrees, the side surfaces of the second transmission gear 4 and the fourth transmission gear 6 are meshed with each other, the fourth transmission gear 6 and the third transmission gear 5 are arranged at 90 degrees, the side surfaces of the second transmission gear and the third transmission gear are meshed with each other, and the circle centers of the second transmission gear and the fourth transmission gear 6 are on the same horizontal line. No. two drive gear 4's side meshing is connected with No. three drive gear 5, No. three drive gear 5 keeps away from No. two drive gear 4's one side fixedly connected with No. four drive gear 6, No. four drive gear 6's centre of a circle department fixedly connected with No. five drive gear 7, No. five drive gear 7's surface meshing is connected with No. two tooth's sockets 8, the surperficial swing joint of presser bar 1 has mounting bracket 9, open the both sides of mounting bracket 9 has the through-hole, the diameter of through-hole is greater than No. two drive gear 4's diameter, movable through-hole has been opened to the side of removal section of thick bamboo 11, No. two tooth's sockets 8.

The outside fixedly connected with air chamber 10 of mounting bracket 9, the centre of a circle department of air chamber 10 is opened has the through-hole, and the diameter of through-hole is the same with the diameter of mounting bracket 9, and mounting bracket 9 cup joints the surface at air chamber 10, and the junction between them scribbles glue. The inside of the air bin 10 is movably connected with a movable barrel 11, the top end of the air bin 10 is fixedly connected with an air inlet 12, the air inlet 12 is a one-way air valve, the air inlet end is in the air, the air outlet end is in the air bin 10, the air outlet 13 is a one-way air valve, the air inlet end is in the movable barrel 11, and the air outlet end is outside the movable barrel 11. The top fixedly connected with inlet port 12 of a removal section of thick bamboo 11, the lower extreme fixedly connected with venthole 13 of a removal section of thick bamboo 11, the inboard fixedly connected with movable connecting rod 14 of a removal section of thick bamboo 11, the lower extreme fixedly connected with slider 15 of movable connecting rod 14, the bottom fixedly connected with slide rail of air storehouse 10, the width of slide rail is greater than the width of slider 15, it has many poles to rise telescopic link 16 to constitute, it is articulated each other, the top fixedly connected with scissors 17 of telescopic link 16, it puts to be 90 degrees to be between scissors 17 and the telescopic link 16. The side of slider 15 is fixedly connected with telescopic link 16, and the top fixedly connected with scissors 17 of telescopic link 16.

The working principle is as follows: when the sewing machine finishes working, the presser foot pressed on clothes needs to be lifted, at the moment, the presser foot drives the presser foot rod 1 to move upwards, the first tooth space 2 is fixedly connected on the presser foot rod 1, the first tooth space 2 is meshed with the first transmission gear 3, the first transmission gear 3 and the second transmission gear 4 rotate coaxially, so that the second transmission gear 4 starts to rotate, the second transmission gear 4 is meshed with the third transmission gear 5, the second transmission gear 4 and the third transmission gear 5 are arranged at 90 degrees, the third transmission gear 5 is meshed with the fourth transmission gear 6, the third transmission gear 5 and the fourth transmission gear 6 are arranged at 90 degrees, so that the rotating directions of the second transmission gear 4 and the fourth transmission gear 6 are opposite, the fourth transmission gear 6 and the fifth transmission gear 7 rotate coaxially, the fifth transmission gear 7 is meshed with the second transmission gear 8, so that the second tooth space 8 starts to move downwards, no. two tooth's socket 8 fixed connection is on moving section of thick bamboo 11, so moving section of thick bamboo 11 begins the downstream, and movable connecting rod 14 fixed connection is on moving section of thick bamboo 11, so movable connecting rod 14 promotes the slider 15 motion, and movable connecting rod 14 has two, and slider 15 also has two, and movable connecting rod 14 promotes slider 15 and moves in opposite directions, fixedly connected with telescopic link 16 on the slider 15, and the top fixedly connected with scissors 17 of telescopic link 16, so when the telescopic link stretches out, scissors 17 cuts the line. When the moving cylinder 11 moves downwards, the air at the upper part in the air bin 10 reduces the pressure intensity and increases, so the air enters the upper part of the air bin 10 through the air inlet hole 12, when the mechanism is lifted, the air with the increased pressure intensity at the upper part enters the moving cylinder 11 through the air inlet hole 12 above the moving cylinder 11, the air pressure intensity in the moving cylinder 11 increases, the air is discharged outside through the air outlet hole 13 at the bottom of the moving cylinder 11, and at the moment, the air flow can blow away the fragments on the workbench.

To sum up, the thread trimming mechanism of the sewing machine for automatically trimming and cleaning the knitting wool moves upwards through the presser bar 1, the first tooth space 2 is fixedly connected on the presser bar 1, the first tooth space 2 is meshed with the first transmission gear 3, the first transmission gear 3 and the second transmission gear 4 rotate coaxially, the second transmission gear 4 is meshed with the third transmission gear 5, the second transmission gear 4 and the third transmission gear 5 are arranged at 90 degrees, the third transmission gear 5 is meshed with the fourth transmission gear 6, the third transmission gear 5 and the fourth transmission gear 6 are arranged at 90 degrees, so that the rotation directions of the second transmission gear 4 and the fourth transmission gear 6 are opposite, the fourth transmission gear 6 and the fifth transmission gear 7 rotate coaxially, the fifth transmission gear 7 is meshed with the second tooth space 8, the second tooth space 8 starts to move downwards, the second tooth space 8 is fixedly connected on the moving cylinder 11, therefore, the movable barrel 11 starts to move downwards, the movable connecting rod 14 is fixedly connected to the movable barrel 11, the movable connecting rod 14 pushes the sliding block 15 to move, the number of the movable connecting rods 14 is two, the number of the sliding blocks 15 is also two, the movable connecting rod 14 pushes the sliding block 15 to move in the opposite direction, the telescopic rod 16 is fixedly connected to the sliding block 15, and the scissors 17 are fixedly connected to the top end of the telescopic rod 16, so that when the telescopic rod extends out, the scissors 17 cut the thread, and therefore the effect that the presser bar 1 can be lifted and simultaneously drives the cutting device to descend after the sewing machine finishes working, the thread connected to clothes is automatically cut is achieved, the working time is reduced, and the working efficiency is improved.

According to the thread trimming mechanism of the sewing machine capable of automatically trimming threads and automatically cleaning the knitting wool, when the moving cylinder 11 moves downwards, the air at the upper part in the air bin 10 reduces the pressure intensity and increases, so that the air enters the upper part of the air bin 10 through the air inlet hole 12, when the moving cylinder 11 rises, the air with the increased pressure intensity at the upper part enters the moving cylinder 11 through the air inlet hole 12 above the moving cylinder 11, the air pressure intensity in the moving cylinder 11 increases, the air is discharged outside through the air outlet hole 13 at the bottom of the moving cylinder 11, and the air flow of the air can blow away the scraps on the workbench, so that the scraps on the workbench can be automatically blown away, the scraps are prevented from entering the inside of the sewing machine and damaging other elements, and the sewing effect is prevented from being influenced when next sewing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.