CN217077999U

CN217077999U - Bottom thread shearing and pressing device of sewing machine

Info

Publication number: CN217077999U
Application number: CN202220924852.XU
Authority: CN
Inventors: 陈飞鹏
Original assignee: Dongguan Yam Hao Mechanical Technology Co ltd
Current assignee: Dongguan Yam Hao Mechanical Technology Co ltd
Priority date: 2022-04-20
Filing date: 2022-04-20
Publication date: 2022-07-29
Anticipated expiration: 2032-04-20

Abstract

The utility model relates to a bottom line shearing and pressing device of a sewing machine, which comprises a fixed block, a fixed knife, a bottom line pressing elastic sheet, a movable knife and a movable knife driving mechanism, wherein the fixed block is arranged at the inner side of a base of the sewing machine, the fixed knife is fixedly arranged at the front side above the fixed block, the bottom line pressing elastic sheet is arranged above the fixed block, the bottom line pressing elastic sheet is close to the fixed knife, the movable knife is rotatably arranged at the rear side above the fixed block, the fixed knife and the movable knife are positioned above a rotating shuttle, the movable knife driving mechanism is arranged at the base of the sewing machine, the movable knife driving mechanism drives the movable knife to rotate, the movable knife sequentially passes through the fixed knife and the bottom line pressing elastic sheet, the movable knife firstly reaches the position of the fixed knife and is combined with the fixed knife to shear the bottom line, then the movable knife reaches the position of the bottom line pressing elastic sheet, the movable knife can press the cut bottom line at the position of the bottom line pressing elastic sheet, the position of the bottom line is kept fixed at the position after each cutting, the line feeding is convenient to perform again, and the production speed is favorably accelerated.

Description

Bottom thread shearing and pressing device of sewing machine

Technical Field

The utility model relates to a sewing machine field, concretely relates to closing device is cuted to sewing machine's bottom line.

Background

The sewing machine is a mechanical device for sewing various materials, when the sewing machine works, the sewing operation is realized through the interpenetration and matching of an upper thread and a lower thread (the upper thread refers to the thread above a workbench, the lower thread refers to a shuttle thread and is arranged on a shuttle peg, the shuttle peg is arranged on a rotating shuttle and is positioned below the workbench, the lower thread penetrates out of the workbench upwards, the upper thread and the lower thread are the prior art of the sewing machine), when the material with a preset length needs to be closed, the lower thread needs to be cut off, when the sewing operation needs to be carried out again, the upper thread needs to be finished, the lower thread of the existing sewing machine is not easy to be threaded, and if a thread cutting mechanism can be improved to enable the lower thread to be threaded more easily, the production speed is undoubtedly greatly accelerated.

SUMMERY OF THE UTILITY MODEL

There is above-mentioned defect to prior art, the utility model aims to solve the problem of thereby "how to better fix a position and live the position after cutting off the bottom line and conveniently go on the line", provide a closing device is cuted to sewing machine's bottom line for this reason, concrete technical scheme is as follows:

the utility model provides a closing device is cuted to bottom line of sewing machine, including the fixed block, the dead knife, press the bottom line shell fragment, move the sword and move sword actuating mechanism, the inboard fixed block of installation of base of sewing machine, fixed block top front side fixed mounting dead knife, the installation of fixed block top presses the bottom line shell fragment, it is close to the dead knife to press the bottom line shell fragment, fixed block top rear side rotation installation moves the sword, the dead knife, move the sword and be located the top of rotating the shuttle, move sword actuating mechanism and install in the base department of sewing machine, it drives the sword and rotate and pass through the dead knife in proper order, press the bottom line shell fragment to move sword and dead knife and close the sword and cut the bottom line, move the sword and press bottom line shell fragment cooperation to push down the bottom line after cutting.

As a preferred scheme of the utility model, move sword actuating mechanism including driving actuating cylinder, connector, rotatory piece, rotation axis and axle sleeve, actuating cylinder is driven in sewing machine's base the place ahead installation, drives actuating cylinder's piston rod installation connector, the articulated rotatory piece one end of connector, rotatory piece other end installation rotation axis, the rotation axis upwards passes the axle sleeve, the axle sleeve is installed at fixed block side lower part, the connection of rotation axis upper end moves the sword.

As a preferred scheme of the utility model, the stationary knife includes fixed board and stationary knife cutting part, and fixed board passes through screw fixed mounting in the fixed block top, and stationary knife cutting part is connected to fixed board one end, and stationary knife cutting part bends backward, and stationary knife cutting part bottom is equipped with the sword groove.

As a preferred scheme of the utility model, press bottom line shell fragment to include flat plate portion, first hang down plate, go up hang down plate and second hang down plate, the flat plate portion passes through the screw fixation and installs in the fixed block top, the flat plate portion is close to fixed plate portion, first hang down plate is connected to flat plate portion one end, first hang down plate inclines downwards to extend, first hang down plate one end is connected and is connected the hang down plate, the hang down plate inclines upwards to extend, the hang down plate is connected to last hang down plate one end, the second hang down plate inclines downwards to extend.

As the utility model discloses a preferred scheme, moving the sword and including the rotating part and moving the sword cutting part, the rotating part is installed in the output that moves sword actuating mechanism, and rotating part one end is connected and is moved the sword cutting part, moves sword cutting part one side and is equipped with outer crook hook groove another side and is equipped with interior crook hook groove, moves sword cutting part tip and is equipped with the recess, is equipped with the through-hole in the recess.

As a preferred scheme of the utility model, still including preventing revolving cylinder and stop lever, prevent revolving cylinder and install in sewing machine's base the place ahead, prevent revolving cylinder's piston rod and connect the stop lever, prevent revolving cylinder drive stop lever and stretch into and withstand the cop latch in the rotating shuttle.

The utility model has the advantages that: the movable knife driving mechanism drives the movable knife to rotate, the movable knife sequentially passes through the fixed knife and the bobbin thread pressing elastic sheet, the movable knife firstly reaches the position of the fixed knife and shears the bobbin thread with the fixed knife, then the movable knife reaches the position of the bobbin thread pressing elastic sheet, the movable knife can press the cut bobbin thread at the position of the bobbin thread pressing elastic sheet, the bobbin thread position is kept fixed at the position after each thread cutting is finished, the bobbin thread feeding is convenient, and the production speed is accelerated.

Drawings

FIG. 1 is a perspective view of the present invention when installed in a sewing machine;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a perspective view of the present invention;

fig. 4 is a perspective view of the movable blade driving mechanism of the present invention;

FIG. 5 is a perspective view of the stationary knife, the bottom line pressing elastic sheet and the moving knife of the present invention;

fig. 6 is an exploded view of the stationary knife, the bottom line pressing elastic sheet and the moving knife of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in fig. 1 to 4, a bobbin thread shearing and pressing device of a sewing machine comprises a fixed block 1, a fixed knife 2, a bobbin thread pressing elastic sheet 3, a movable knife 4 and a movable knife driving mechanism 5, wherein the fixed block 1 is arranged at the inner side of a base 6 of the sewing machine, the fixed knife 2 is fixedly arranged at the front side above the fixed block 1, the bobbin thread pressing elastic sheet 3 is arranged above the fixed block 1, the bobbin thread pressing elastic sheet 3 is close to the fixed knife 2, the movable knife 4 and the fixed knife 2 are rotatably arranged at the rear side above the fixed block 2, the movable knife 4 is positioned above the rotating shuttle 7, a bobbin is installed in the rotating shuttle 7, a bobbin thread is discharged upwards by the bobbin, the bobbin thread pressing elastic sheet 3 is lower than the fixed knife 2 and the movable knife 4, the movable knife driving mechanism 5 is installed at the base 6 of the sewing machine, the movable knife driving mechanism 5 drives the movable knife 4 to rotate and sequentially pass through the fixed knife 2 and the bobbin thread pressing elastic sheet 3, the movable knife 4 and the fixed knife 2 are combined to cut the bobbin thread, and the movable knife 4 and the bobbin thread pressing elastic sheet 3 are matched to press the cut bobbin thread.

As shown in fig. 4, the movable knife driving mechanism 5 includes a driving cylinder 51, a connector 52, a rotating block 53, a rotating shaft 54 and a shaft sleeve 55, the driving cylinder 51 is installed in front of the base 6 of the sewing machine, the connector 52 is installed on a piston rod of the driving cylinder 51, the connector 52 is a universal joint ball head, the connector 52 is hinged to one end of the rotating block 53, the rotating shaft 54 is installed at the other end of the rotating block 53, the rotating shaft 54 upwardly penetrates through the shaft sleeve 55, the shaft sleeve 55 is installed at the lower side of the fixed block 1, the movable knife 4 is connected to the upper end of the rotating shaft 54, when the piston rod of the driving cylinder 51 extends out, the rotating block 53 clockwise rotates, the rotating block 53 drives the movable knife 4 to clockwise rotate through the rotating shaft 54, and the movable knife 4 rotates to pass through the fixed knife 2 and the bottom line pressing elastic piece 3.

As shown in fig. 5 and 6, the fixed blade 2 includes a fixed plate portion 21 and a fixed blade portion 22, the fixed plate portion 21 is fixed above the fixed block 1 by screws, one end of the fixed plate portion 21 is connected to the fixed blade portion 22, the fixed blade portion 22 is bent to incline backward, and a blade groove 23 is formed in the bottom of the fixed blade portion 22. The bottom line pressing spring piece 3 comprises a flat plate part 31, a first lower inclined plate 32, an upper inclined plate 33 and a second lower inclined plate 34, wherein the flat plate part 31 is fixedly arranged above the fixed block 1 through screws, the flat plate part 31 is close to the fixed plate part 21, one end of the flat plate part 31 is connected with the first lower inclined plate 32, the first lower inclined plate 32 extends obliquely downwards, one end of the first lower inclined plate 32 is connected with the upper inclined plate 33, the upper inclined plate 33 extends obliquely upwards, one end of the upper inclined plate 33 is connected with the second lower inclined plate 34, and the second lower inclined plate 34 extends obliquely downwards. The movable blade 4 comprises a rotating part 41 and a movable blade part 42, the rotating part 41 is mounted at the output end of the movable blade driving mechanism 5, namely the upper end of a rotating shaft 54, one end of the rotating part 41 is connected with the movable blade part 42, one surface of the movable blade part 42 is provided with an outward bent hook groove 43, the other surface is provided with an inward bent hook groove 44, the end part of the movable blade part 42 is provided with a groove 45, and a through hole 46 is arranged in the groove 45.

Specifically, the bobbin thread shearing and pressing device of the sewing machine further comprises an anti-rotation air cylinder 8 and a stop rod 9, the anti-rotation air cylinder 9 is installed in front of the base 6 of the sewing machine, a piston rod of the anti-rotation air cylinder 8 is connected with the stop rod 9, and the anti-rotation air cylinder 8 drives the stop rod 9 to extend into the rotating shuttle 7 to push against the bobbin to prevent the bobbin from rotating so as to enable the bobbin thread to run.

The above description is provided for the purpose of describing the present invention in more detail with reference to the preferred embodiments, and it should not be construed that the present invention is limited to these descriptions, and it will be apparent to those skilled in the art that the present invention can be implemented in many ways without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a closing device is cuted to sewing machine's bottom line which characterized in that: the bottom thread pressing elastic sheet is installed above the fixed block, the movable knife is rotatably installed on the rear side above the fixed block, the fixed knife and the movable knife are located above the rotating shuttle, the movable knife driving mechanism is installed at the base of the sewing machine, the movable knife is driven by the movable knife driving mechanism to rotate and sequentially pass through the fixed knife and the bottom thread pressing elastic sheet, the bottom thread is cut by the movable knife and the fixed knife in a combined mode, and the movable knife and the bottom thread pressing elastic sheet are matched to press the cut bottom thread.

2. The lower thread cutting and pressing device of a sewing machine according to claim 1, wherein: move sword actuating mechanism and drive actuating cylinder, connector, rotatory piece, rotation axis and axle sleeve including driving, the installation of sewing machine's base the place ahead drives actuating cylinder, drives actuating cylinder's piston rod installation connector, and the articulated rotatory piece one end of connector, the rotatory piece other end installation rotation axis, the rotation axis upwards passes the axle sleeve, and the axle sleeve is installed in fixed block side lower part, and the connection of rotation axis upper end moves the sword.

3. The lower thread cutting and pressing device of a sewing machine according to claim 1, wherein: the fixed knife comprises a fixed plate part and a fixed knife edge part, the fixed plate part is fixedly arranged above the fixed block through screws, one end of the fixed plate part is connected with the fixed knife edge part, the fixed knife edge part is bent backwards, and a knife groove is formed in the bottom of the fixed knife edge part.

4. The lower thread cutting and pressing device of a sewing machine according to claim 1, wherein: the bottom pressing line elastic piece comprises a flat plate part, a first downward inclined plate, an upper inclined plate and a second downward inclined plate, the flat plate part is fixedly installed above the fixed block through screws, the flat plate part is close to the fixed plate part, one end of the flat plate part is connected with the first downward inclined plate, the first downward inclined plate extends in a downward inclined mode, one end of the first downward inclined plate is connected with the upper inclined plate, the upper inclined plate extends in an upward inclined mode, one end of the upper inclined plate is connected with the second downward inclined plate, and the second downward inclined plate extends in a downward inclined mode.

5. The lower thread cutting and pressing device of a sewing machine according to claim 1, wherein: move the sword and include the rotating part and move the sword blade portion, the rotating part is installed in moving the output of sword actuating mechanism, and rotating part one end is connected and is moved the sword blade portion, moves sword blade portion one side and is equipped with outer hook groove another side and is equipped with interior hook groove, moves sword blade portion tip and is equipped with the recess, is equipped with the through-hole in the recess.

6. The lower thread cutting and pressing device of a sewing machine according to claim 1, wherein: the anti-rotation mechanism comprises a rotating shuttle and a rotating shuttle, and is characterized by further comprising an anti-rotation cylinder and a stop rod, wherein the anti-rotation cylinder is installed in front of a base of the sewing machine, a piston rod of the anti-rotation cylinder is connected with the stop rod, and the anti-rotation cylinder drives the stop rod to extend into the rotating shuttle to jack the shuttle peg.