CN214992290U - Sewing machine take-up head device and sewing machine - Google Patents

Abstract

The utility model provides a sewing machine take-up device and sewing machine, sewing machine includes the aircraft nose, is located faller and sewing machine take-up device of aircraft nose below, sewing machine take-up device includes that eedle, line collude, doubling piece, actuating mechanism and is located presser foot on the faller, be equipped with the needle eye that supplies the suture to pass on the eedle, be equipped with on the presser foot with the corresponding line groove of crossing of eedle, cross the inslot and be equipped with the cutter that is used for cutting off the suture, the line colludes and passes through drive assembly with the aircraft nose is connected, drive assembly is used for the drive the line colludes the eedle with make irregular reciprocating motion between the doubling piece, the line collude and is used for hooking the end of a thread of needle eye below and with the doubling piece will the end of a thread is cliied. Because the thread hook does irregular reciprocating motion, the sewing machine can be suitable for the installation of a fixed rule, meet the requirements of various sewing processes, facilitate the operation of workers and reduce the danger of the operation.

Description

Sewing machine take-up head device and sewing machine

Technical Field

The utility model relates to a sewing technical field especially relates to a sewing machine receives line head device and sewing machine.

Background

When a sewing machine sews a sewing material, a thread end with a certain length needs to be left at the needle eye of a needle when the sewing machine starts to sew so as to ensure that the thread end cannot be separated from the needle eye when starting sewing, but the thread end with the certain length on the needle eye of the needle can be left at the initial sewing position of the sewing material when starting sewing, and the appearance of the sewing material is influenced. At present, the thread end is usually taken under the sewing material through the treatment of a thread shifting device or an electronic thread clamping device during sewing, so that the front attractive appearance of the sewing material is ensured. However, due to the rapid action of the sewing machine, the thread ends are accumulated under the sewing material during the seam starting to form a nest-shaped thread ball, which is commonly called as a "bird nest" phenomenon, and particularly, the "bird nest" phenomenon at the seam starting position is obvious during the seam starting automatic reinforcing mode.

Patent No. CN201510349411.6 discloses a bird's nest device is got rid of to sewing machine and application method, carries out the circular arc swing through actuating mechanism control drag hook between eedle below and clip line piece, and when the drag hook was located the eedle below, will the suture of eedle is picked up, and when the drag hook rotated to clip line piece complex position, the drag hook was cliied the end of a thread with clip line piece, and the end of a thread is cut off to the secant sword of the bottom of the line groove of crossing of reuse presser foot. Although the problem of nest-shaped thread groups can be solved to a certain extent by the mode, the motion mode of the pull hook is circular motion, the motion track is fixed and can not be adjusted, the flexibility is lacked, the interference with other parts is easy to occur, the operation of workers is inconvenient, and the requirements of various sewing processes can not be met. In addition, the thread hooking needs to be carried out after the thread cutting, the required time is long, and the production efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sewing machine take-up device and sewing machine can satisfy the various requirement of making up technology, and makes things convenient for workman's operation, can reduce the danger of operation.

In order to achieve the above object, the utility model provides a sewing machine take-up device, sewing machine includes the aircraft nose and is located the faller of aircraft nose below, sewing machine take-up device includes that eedle, line collude, doubling piece, actuating mechanism and is located presser foot on the faller, be equipped with the pinpoint that supplies the suture to pass on the eedle, be equipped with on the presser foot with the corresponding line groove of crossing of eedle, cross the inslot and be equipped with the cutter that is used for cutting off the suture, the line colludes and passes through actuating mechanism with the aircraft nose is connected, actuating mechanism is used for the drive the line colludes the eedle with make irregular reciprocating motion between the doubling piece, the line collude and is used for hooking the end of a thread below the pinpoint and with the doubling piece will the end of a thread is cliied.

Optionally, the drive mechanism comprises:

the attraction component comprises an electromagnet and an iron core, and the electromagnet is electrified and attracts the iron core;

the first transmission assembly comprises a first crank, a second crank, a first connecting rod and a rotating shaft, one end of the first crank is hinged to the iron core, the other end of the first crank is hinged to one end of the first connecting rod, the other end of the first connecting rod is hinged to the second crank, the second crank is fixedly connected with the rotating shaft, the rotating shaft is fixedly connected with the wire hook, and when the electromagnet is electrified, the iron core drives the wire hook to do circular motion by taking the rotating shaft as the circle center through the first crank, the first connecting rod, the second crank and the rotating shaft;

the second transmission assembly comprises a second connecting rod and a crank cam, wherein one end of the second connecting rod is hinged to the first crank, the other end of the second connecting rod is hinged to the crank cam, the crank cam is provided with an eccentric hole which is through, the rotating shaft penetrates through the eccentric hole and the crank cam is hinged to the crank cam, and when the electromagnet is electrified, the iron core passes through the second connecting rod and the crank cam drives the rotating shaft to do circular motion.

Optionally, a shockproof pad and a blocking pad are respectively arranged on two sides of the iron core, when the iron core moves to be in contact with the shockproof pad, the wire hook moves to the position below the needle, and when the iron core moves to be in contact with the blocking pad, the wire hook moves to the position below the wire clamping piece and clamps the wire end with the wire clamping piece.

Optionally, the take-up device of the sewing machine further comprises a fixing support and an adjusting nut, the thread clamping piece and the adjusting nut are both located on the fixing support, and the adjusting nut is used for adjusting the distance between the thread clamping piece and the thread hook so as to adjust the clamping force between the thread clamping piece and the thread hook.

Optionally, an air suction pipe is further arranged on the fixed support, and an air suction opening of the air suction pipe is opposite to a clamping position of the wire clamping piece and the wire hook so as to suck off the cut wire end.

The utility model also provides a sewing machine, include the aircraft nose, be located the faller of aircraft nose below and sewing machine receive the line head device.

The utility model provides a pair of among sewing machine take-up head device and sewing machine, have one of following beneficial effect at least:

1) the thread hook performs irregular reciprocating motion between the needle and the thread clamping sheet, can be suitable for fixed gauge installation, meets the requirements of various sewing processes, is convenient for workers to operate, and can reduce the operation danger;

2) the motion trail of the thread hook between the needle and the thread clamping piece is adjustable;

3) the clamped thread end is cut off at the position close to the sewing material needle hole, the residual thread end is short, and the problem of bird nest thread end is thoroughly solved;

4) because the thread hook and the needle act simultaneously and are not interfered with each other, compared with the conventional thread end removing method, the method reduces the pause time of the thread hook and improves the operation efficiency on the premise of ensuring the seam starting quality.

Drawings

Fig. 1 is a threading schematic view of a take-up head device of a sewing machine according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention;

fig. 3 is a movement track diagram of the wire hook provided by the embodiment of the present invention;

fig. 4 is a partially enlarged view of the thread take-up device of the sewing machine according to the embodiment of the present invention;

fig. 5 is a partial enlarged view of a crank-cam according to an embodiment of the present invention;

wherein the reference numerals are:

10-a machine head; 11-a wire passing plate; 12-a wire gripper; 13-large wire gripper; 14-take-up lever; 15-needle raising and thread clamping device; 20-needle plate; 21-a machine needle; 22-presser foot; 23-a cutter; 30-line hook; 40-wire clamping sheets; 50-suture; 60-an electromagnet; 61-iron core; 62-a shock pad; 63-a stop pad; 71-a first crank; 72-a second crank; 73-a first link; 74-a rotating shaft; 75-a second link; 76-crank cam; 77-hinge point of crank cam and rotating shaft; 81-axial screws; 82. 83, 84-pins; 90-fixing the bracket; 91-adjusting the nut; 92-suction pipe.

Detailed Description

The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

As shown in fig. 1 to 4, the present embodiment provides a thread take-up head device of a sewing machine, the sewing machine includes a head 10 and a needle plate 20 located below the head 10, the take-up device of the sewing machine comprises a needle 21, a thread hook 30, a thread clamping sheet 40, a driving mechanism and a presser foot 22 positioned on the needle plate 20, a needle eye for the thread 50 to pass through is arranged on the needle 21, a thread passing groove corresponding to the needle 21 is arranged on the presser foot 22, a cutter 23 for cutting off the suture 50 is arranged in the thread passing groove, the thread hook 30 is connected with the machine head 10 through the driving mechanism, the driving mechanism is used for driving the thread hook 30 to do irregular reciprocating motion between the needle 21 and the thread clamping piece 40, the thread hook 30 is used for hooking the thread end 50 below the needle eye and clamping the thread 50 with the thread clamping piece 40.

Specifically, with reference to fig. 2 to 5, the driving mechanism includes:

the attraction component comprises an electromagnet 60 and an iron core 61, wherein the electromagnet 60 is electrified and attracts the iron core 61;

the first transmission assembly comprises a first crank 71, a second crank 72, a first connecting rod 73 and a rotating shaft 74, one end of the first crank 71 is hinged to the iron core 61, the other end of the first crank 71 is hinged to one end of the first connecting rod 73, the other end of the first connecting rod 73 is hinged to the second crank 72, the second crank 72 is fixedly connected to the rotating shaft 74, the rotating shaft 74 is fixedly connected to the wire hook 30, and when the electromagnet 60 is powered on, the iron core 61 drives the wire hook 30 to make circular motion by taking the rotating shaft 74 as a circle center through the first crank 71, the first connecting rod 73, the second crank 72 and the rotating shaft 74;

the second transmission assembly comprises a second connecting rod 75 and a crank cam 76, one end of the second connecting rod 75 is hinged to the first crank 71, the other end of the second connecting rod 75 is hinged to the crank cam 76, the crank cam 76 is in hole connection with the rotating shaft 74, and when the electromagnet 60 is powered on, the iron core 61 drives the rotating shaft 74 to do circular motion through the second connecting rod 75 and the crank cam 76.

In this embodiment, when the needle 21 is about to leave the sewing material, the electromagnet 60 is controlled by the electronic control system to be powered on so as to attract the iron core 61, the iron core 61 and the first crank 71 are hinged by a pin, the first crank 71 rotates around the shaft position screw 81, and the first crank 71 is hinged with the first connecting rod 73 and the second connecting rod 75 by pins 82 and 83, respectively, so as to drive the first connecting rod 73 and the second connecting rod 75 to move. The first connecting rod 73 is hinged to the second crank 72 through a pin 84, the first connecting rod 73 drives the second crank 72 to move, the second crank 72 and the rotating shaft 74 are fixed through screws, the second crank 72 drives the rotating shaft 74 to rotate, the rotating shaft 74 and the wire hook 30 are fixed through nuts, and the wire hook 30 rotates by taking the rotating shaft 74 as a circle center. The second connecting rod 75 is connected with the crank cam 76 through the pin 19, the second connecting rod 75 drives the crank cam 76 to rotate, the rotating shaft 74 is arranged on the crank cam 76 through the hole, and the crank cam 76 drives the rotating shaft 74 to do circular motion. Since the movement of the first link 73 and the second link 75 acts on the wire hook 30 through the rotating shaft 74, the movement of the wire hook 30 is a combined movement, and further the movement track of the hook tip of the wire hook is irregular.

In this embodiment, the hook 30 makes a circular motion with the rotating shaft 74 as an axis, the rotating shaft 74 rotates around a hinge point 77 between the crank cam 76 and the rotating shaft 74, that is, the position of the axis of the rotating shaft 74 is changed, and the hook tip of the hook 30 rotates around the variable axis of the rotating shaft 74 with the hook 30 as a radius, so as to form an irregular motion track. Therefore, the track of the thread hook 30 is flexible, the thread hook is suitable for the installation of a fixed rule, the requirements of various sewing processes can be met, the operation of workers is convenient, and the operation danger can be reduced.

In this embodiment, referring to fig. 5, the crank cam 76 has an eccentric hole therethrough, and the rotating shaft 74 passes through the eccentric hole and is hinged to the crank cam 76, so that the position of the axial center of the rotating shaft 74 is changed due to the eccentric hole.

In addition, only the crank cam 76 with different specifications (different eccentric amounts of the eccentric holes) needs to be replaced, so that the movement track of the axis of the rotating shaft 74 is changed, the movement track of the hook tip of the wire hook 30 can be changed, the adjustment of the movement track of the hook tip of the wire hook 30 is realized, and the wire hook is convenient to adapt to different use occasions.

Referring to fig. 2, a shock-proof pad 62 and a stop pad 63 are respectively disposed on two sides of the iron core 61, when the iron core 61 moves to contact with the shock-proof pad 62, the thread hook 30 moves to a position below the needle 21, and when the iron core 61 moves to contact with the stop pad 63, the thread hook 30 moves to a position below the thread clamping piece 40 and clamps the thread end 50 with the thread clamping piece 40. In this embodiment, the shock-proof pad 62 and the stop pad 63 are used for limiting, so that the thread hook 30 reciprocates between the thread clamping piece 40 and the needle 21.

With reference to fig. 4, the thread take-up device of the sewing machine further includes a fixing bracket 90 and an adjusting nut 91, the thread clamping piece 40 and the adjusting nut 91 are both located on the fixing bracket 90, and the adjusting nut 91 is used for adjusting the distance between the thread clamping piece 40 and the thread hook 30. For example, the adjusting nut 91 is rotated clockwise (or counterclockwise) to move the thread clamping piece 40 toward the direction close to the thread hook 30 and press the thread hook 30, so as to ensure sufficient clamping force between the thread clamping piece 40 and the thread hook 30 to prevent the thread end from falling.

Further, still be provided with aspiration channel 92 on fixed bolster 90, the inlet scoop of aspiration channel 92 is just right the thread tension sheet 40 with the tight department of clamp of line hook 30 to suck away the end of a thread that is cut off, realize the quick clearance of end of a thread, degree of automation is high, labour saving and time saving.

Based on this, with reference to fig. 2 to 5, the present application further provides a method for using a thread take-up head device of a sewing machine, including the following steps:

s1, after last sewing is finished, when the needle 21 leaves the sewing material, the electromagnet 60 is electrified and attracts the iron core 61, the thread hook 30 moves under the driving of the first transmission component and the second transmission component, when the needle 21 moves to the highest point, the thread hook 30 moves to the position below the needle 21, and the thread head of the thread 50 below the needle eye of the needle 21 is hooked;

s2, powering off the electromagnet 60, driving the wire hook 30 to move below the wire clamping piece 40 under the driving of the first transmission component and the second transmission component, and clamping the wire head between the wire hook 30 and the wire clamping piece 40;

and S3, starting the sewing machine, starting the sewing by the needle 21, moving the sewing material along the thread passing groove direction of the presser foot 22 in the sewing process, and cutting when the thread head touches the thread cutting knife.

Firstly, step S1 is executed, after the last sewing is finished, thread cutting is usually required, and the conventional practice is to drive the thread hook 30 to move after the needle 21 is reset, but in this embodiment, when the needle 21 leaves the sewing material, the electromagnet 60 is powered on and the iron core 61 is attracted by the electric control system, so that the thread hook 30 moves under the driving of the first transmission component and the second transmission component, and through designing the time for resetting the needle 21, when the needle 2 stops at the upper needle position, the thread hook 30 just moves to the lower side of the needle 21, and at this time, the thread hook 30 hooks the thread end of the thread 50 below the eye of the needle 21 and immediately resets. Because the thread hook 30 and the needle 21 act simultaneously and do not interfere with each other, compared with the conventional thread end removing method, the method reduces the pause time of the thread hook 30 and improves the operation efficiency on the premise of ensuring the seam starting quality.

Then, step S2 is executed, the electromagnet 60 is powered off by the electronic control system, the iron core 61 is released, the thread hook 30 moves to the lower side of the thread clamping piece 40 under the driving of the first transmission component and the second transmission component, and the thread 50 is clamped between the thread hook 30 and the thread clamping piece 40.

Finally, step S3 is executed, the sewing machine is started, the needle 21 starts sewing, since one end of the thread 50 is fixed on the sewing material, and the other end is clamped by the thread hook 30 and the thread clamping piece 40, the sewing material moves backward along the thread passing groove direction of the presser foot 22, which is equivalent to the forward movement of the presser foot 22, so that the cutter 23 cuts the thread 50. When the sewing machine finishes cutting the thread 50 again, the hook 30 moves toward the needle 21 to release the cut thread 50.

Further, the take-up device of the sewing machine further comprises a fixing support 90 and an adjusting nut 91, the thread clamping piece 40 and the adjusting nut 91 are both located on the fixing support 90, when the thread hook 30 is driven by the first transmission assembly and the second transmission assembly to move to the position below the thread clamping piece 40, the distance between the thread clamping piece 40 and the thread hook 30 is adjusted through the adjusting nut 91 so as to clamp the thread 50.

Furthermore, the fixing bracket 90 is further provided with an air suction pipe 92 which is hooked to the needle 21 to move, and after the cut thread end is loosened, the air suction pipe 92 is started and the cut thread end is sucked away.

In addition, referring to fig. 1, the present application further provides a sewing machine, which includes a machine head 10, a needle plate 20 located below the machine head 10, and the thread take-up device of the sewing machine. The sewing machine further comprises a thread passing plate 11, a thread clamping device 12, a large thread clamping device 13, a thread take-up lever 14 and a needle lifting thread clamping device 15, wherein a thread passes through the thread passing plate 11, the thread clamping device 12, the thread clamping device 13, the thread take-up lever 14, the needle lifting thread clamping device 15 and a needle eye of a machine needle 21.

To sum up, the embodiment of the utility model provides a sewing machine take-up head device and sewing machine, through drive line hook make irregular reciprocating motion between the eedle and the thread clamping piece of actuating mechanism, can be suitable for the installation of fixed rule, satisfy the requirement of various sewing processes, and make things convenient for workman's operation, can reduce the danger of operation; the movement track of the thread hook between the needle and the thread clamping piece can be adjusted by replacing crank cams with different eccentricity; because the thread hook and the needle act simultaneously and are not interfered with each other, compared with the conventional thread end removing method, the method reduces the pause time of the thread hook and improves the operation efficiency on the premise of ensuring the seam starting quality.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims (6)

1. The utility model provides a sewing machine take-up device, sewing machine includes the aircraft nose and is located the faller of aircraft nose below, a serial communication port, sewing machine take-up device includes eedle, line collude, thread clamping sheet, actuating mechanism and is located presser foot on the faller, be equipped with the needle eye that supplies the suture to pass on the eedle, be equipped with on the presser foot with the corresponding line groove of crossing of eedle, cross the inslot and be equipped with the cutter that is used for the cut-off suture, the line collude pass actuating mechanism with the aircraft nose is connected, actuating mechanism is used for the drive the line colludes the needle with make irregular reciprocating motion between the thread clamping sheet, the line colludes and is used for hooking the end of thread below the needle eye and with the thread clamping sheet will the end of thread is cliied.

2. A sewing machine take-up head assembly as claimed in claim 1, wherein the drive mechanism comprises:

the attraction component comprises an electromagnet and an iron core, and the electromagnet is electrified and attracts the iron core;

the first transmission assembly comprises a first crank, a second crank, a first connecting rod and a rotating shaft, one end of the first crank is hinged to the iron core, the other end of the first crank is hinged to one end of the first connecting rod, the other end of the first connecting rod is hinged to the second crank, the second crank is fixedly connected with the rotating shaft, the rotating shaft is fixedly connected with the wire hook, and when the electromagnet is electrified, the iron core drives the wire hook to do circular motion by taking the rotating shaft as the circle center through the first crank, the first connecting rod, the second crank and the rotating shaft;

the second transmission assembly comprises a second connecting rod and a crank cam, wherein one end of the second connecting rod is hinged to the first crank, the other end of the second connecting rod is hinged to the crank cam, the crank cam is provided with an eccentric hole which is through, the rotating shaft penetrates through the eccentric hole and is hinged to the crank cam when the electromagnet is electrified, and the iron core passes through the second connecting rod and the crank cam drives the rotating shaft to do circular motion.

3. The thread take-up device of a sewing machine according to claim 2, wherein a shock pad and a stopper pad are respectively provided on both sides of the iron core, the thread hook moves to below the needle when the iron core moves to contact with the shock pad, and the thread hook moves to below the thread clamping piece and clamps the thread with the thread clamping piece when the iron core moves to contact with the stopper pad.

4. The sewing machine take-up device of claim 2, further comprising a fixing bracket and an adjusting nut, wherein the thread clamping piece and the adjusting nut are both located on the fixing bracket, and the adjusting nut is used for adjusting the distance between the thread clamping piece and the thread hook so as to adjust the clamping force between the thread clamping piece and the thread hook.

5. The take-up device of a sewing machine according to claim 4, wherein the fixing bracket is further provided with an air suction pipe, and an air suction opening of the air suction pipe is over against a clamping position of the thread clamping piece and the thread hook so as to suck off the cut thread end.

6. A sewing machine comprising a head, a needle plate located below the head, and a sewing machine thread take-up device as claimed in any one of claims 1 to 5.

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