CN116121967A - Sewing machine - Google Patents

Abstract

The invention provides a sewing machine, and belongs to the technical field of sewing equipment. The sewing machine comprises a cloth feeding mechanism, a thread cutting mechanism and a presser foot lifting mechanism, and further comprises a motor, wherein the motor is a double-headed motor, a crank I for driving the presser foot to move upwards is arranged on one end part of an output shaft of the motor, and a rotary table for driving the cloth feeding mechanism to feed cloth and a crank II for driving the thread cutting mechanism to cut threads are arranged on the other end part of the output shaft of the motor. The sewing machine is characterized in that the cloth feeding mechanism, the thread cutting mechanism and the presser foot lifting mechanism are respectively and independently driven by one motor, three actions of cloth feeding, thread cutting and presser foot lifting are realized, and a driving source is used for completing the required actions, so that the structure is simplified and the working efficiency is improved.

Description

Sewing machine

Technical Field

The invention belongs to the technical field of sewing equipment, and relates to a sewing machine.

Background

When the sewing machine is used for sewing, the actions of feeding cloth, cutting threads and lifting presser feet are needed, the corresponding sewing machine is provided with a cloth feeding mechanism, a thread cutting mechanism and a presser foot lifting mechanism, and in the prior art, the cloth feeding mechanism, the thread cutting mechanism and the presser foot lifting mechanism are generally mutually independent mechanisms which are driven by different motors or electromagnets respectively, so that the sewing machine is large in occupied space and high in cost.

In some sewing machines, there is a mechanism for driving a thread cutting and a presser foot lifting by a motor, for example, a thread cutting and presser foot lifting mechanism of a sewing machine provided by application number 202022393721.7, which has the disadvantage that a cloth feeding mechanism needs to be driven by another driving source, so that the prior art still has certain defects.

Disclosure of Invention

The invention aims at the problems existing in the prior art, and provides a sewing machine, which aims at solving the technical problems that: how to realize the actions of feeding cloth, cutting wires and lifting presser feet by one driving source.

The aim of the invention can be achieved by the following technical scheme:

the utility model provides a sewing machine, sewing machine includes work feed mechanism, cuts line mechanism and lifts presser foot mechanism, its characterized in that, sewing machine still includes the motor, the motor is the double-end motor, install the crank one that drives the presser foot and upwards remove on one tip of the output shaft of motor, install on the other tip of the output shaft of motor the drive work feed mechanism feed turntable and the drive cut line mechanism cut the crank two of line.

The working principle is as follows: when the sewing machine works, the motor drives the rotary table to reciprocate, and the swinging rotary table drives the cloth feeding mechanism to swing, so that the cloth feeding teeth on the cloth feeding mechanism do elliptical motion, and cloth feeding is realized; when the wire is needed to be cut, the motor drives the turntable to rotate by a larger angle, the turntable is separated from the cloth feeding mechanism, the cloth feeding mechanism stops feeding, the crank II drives the wire cutting mechanism to act, the wire cutting mechanism cuts off the wire on the cloth, the motor drives the crank I to drive the presser foot lifting mechanism to swing, the presser foot lifting mechanism drives the presser foot to move upwards, the motor continues to rotate, after the crank II rotates to a certain angle, the wire cutting mechanism resets, after the motor rotates for a circle, the turntable is contacted with the cloth feeding mechanism again, and the turntable continues to swing back and forth and drives the cloth feeding mechanism to swing, and the cloth feeding is continued.

The motor of the sewing machine is a double-headed motor, and the motor is used for respectively and independently driving the cloth feeding mechanism, the thread cutting mechanism and the presser foot lifting mechanism to realize three actions of cloth feeding, thread cutting and presser foot lifting, and a driving source is used for completing the required actions, so that the structure is simplified and the working efficiency is improved.

In the above sewing machine, the cloth feeding mechanism is provided with the swing rod, the swing rod is connected with the first roller, the periphery of the turntable is provided with the groove, and when the first roller is clamped in the groove, the turntable can push the swing rod to swing.

In the structure, the first idler wheel on the swing rod can be clamped in the groove of the turntable, and when the motor drives the turntable to swing reciprocally, the turntable drives the cloth feeding mechanism to swing through the first idler wheel and the swing rod, so that cloth feeding is realized.

In the sewing machine, a bracket is mounted on one end of the motor, the bracket is provided with two bosses which are oppositely arranged, and the roller is positioned between the two bosses and can be abutted against the bosses.

When cloth is fed, the first roller swings reciprocally between two oppositely arranged bosses, the bosses limit the rollers together, and the structure can limit the swing angle of the first roller within a proper range, so that the swing amplitude of the cloth feeding teeth during cloth feeding is adjusted; when the wire is needed to be cut, the motor drives the turntable to rotate by a larger angle, the first roller abuts against one boss after rotating along with the turntable, the turntable continues to rotate, the first roller stops rotating, then the turntable is separated from the first roller, and the cloth feeding mechanism stops feeding cloth.

In the sewing machine, the boss is connected with the bolt in a threaded manner, a screw rod of the bolt penetrates out of the boss, and the roller I can be abutted against the screw rod or one boss.

In the structure, when cloth is fed, the first roller swings back and forth between the screw rod and one boss, and the screw rod and the boss limit the roller together. The bolt on one boss is rotated, and the swing angle of the first roller can be adjusted according to the requirement by adjusting the relative position of the screw rod and the other boss, so that the swing amplitude of the feed dog during feed is adjusted, and the smoothness during feed is improved.

In the sewing machine, the swing rod is provided with the curved bar, the outer end part of the curved bar and the bracket are connected with the spring, and the spring is in a tension state and enables the roller I to have a trend of leaning against the peripheral edge of the turntable or the groove.

In this structure, the spring that receives the extension is through curved lever to gyro wheel one exert a power, and this power makes gyro wheel one support all the time on the periphery of carousel or in the recess of carousel, and this structure makes gyro wheel one be soft contact with the carousel, and gyro wheel one inseparable joint is in the recess, is difficult for droing, guarantees good transmission effect.

In the above-mentioned sewing machine, the thread cutting mechanism includes the special-shaped ring that can swing, the special-shaped ring includes arc section, the cut line section that one side is connected and the section that resets, install the gyro wheel second on the tip of crank, the gyro wheel second is located in the special-shaped ring, when gyro wheel second with cut line section offsets and leans on, gyro wheel second can promote the special-shaped ring swing.

When the second roller is positioned in the special-shaped ring and is used for feeding cloth, the second roller swings in the arc section, the motion track of the second roller is consistent with the extending direction of the arc section, the second roller does not push the special-shaped ring to swing even though the second roller contacts with the arc section, the wire cutting mechanism does not act at the moment, when the wire cutting is needed, the first roller is driven by the motor to rotate a larger angle and then abuts against one boss after rotating along with the rotary table, the rotary table continues to rotate, the first roller stops rotating, then the rotary table is separated from the first roller, the cloth feeding mechanism stops feeding cloth, at the moment, the second roller swings to the position of the wire cutting section and abuts against the wire cutting section, the special-shaped ring is pushed to swing through the wire cutting section, the wire cutting mechanism acts, the wire cutting mechanism cuts off the wire on the cloth, the motor continues to rotate, after the second roller moves to the reset section, the wire cutting mechanism starts to reset after the motor rotates for a circle, the first roller is clamped in the groove of the rotary table again, the rotary table is driven by the motor to reciprocate to swing, at the moment, the rotary table is driven by the swinging cloth feeding mechanism to swing, the cloth feeding mechanism continues to feed cloth, and the second roller rotates to the arc section, and the motion track of the second roller is inconsistent with the extending direction of the wire cutting mechanism.

When the second roller moves to the reset section, if the thread cutting mechanism does not start to reset, the second roller rotates to the arc section and then pushes the special-shaped ring to swing reversely, so that the thread cutting mechanism gradually resets until the motion track of the second roller is consistent with the extending direction of the arc section.

In the above sewing machine, the presser foot lifting mechanism is provided with a connecting rod, one end of the first crank is provided with a third roller, and the third roller can abut against the connecting rod and push the connecting rod to swing.

When the motor drives the crank I to swing, the crank I pushes the connecting rod to swing upwards through the idler wheel III, and the connecting rod drives the presser foot to move upwards through the presser foot lifting mechanism, so that the presser foot is lifted.

In the above sewing machine, the motor is a stepping motor.

Compared with the prior art, the invention has the following advantages:

1. the sewing machine is characterized in that the cloth feeding mechanism, the thread cutting mechanism and the presser foot lifting mechanism are respectively and independently driven by one motor, three actions of cloth feeding, thread cutting and presser foot lifting are realized, and a driving source is used for completing the required actions, so that the structure is simplified and the working efficiency is improved.

2. The spring of the sewing machine enables the roller I to be always abutted against the periphery of the turntable or in the groove of the turntable, the roller I is tightly clamped in the groove and is not easy to fall off, and good transmission effect is ensured.

Drawings

FIG. 1 is a schematic view of the structure of the present sewing machine (the housing is not shown);

FIG. 2 is a schematic illustration of a crank II and turntable mounted on a motor;

FIG. 3 is a schematic illustration of a crank-mounted motor;

FIG. 4 is a schematic structural view of a turntable;

FIG. 5 is a schematic structural view of a bracket;

fig. 6 is a schematic structural view of the profiled ring.

In the figure: the device comprises a cloth feeding mechanism 1, a thread cutting mechanism 2, a presser foot lifting mechanism 3, a motor 4, a crank one, a turntable 6, a crank two, a swing rod 8, a roller one, a groove 10, a bracket 11, a boss 12, a bolt 13, a bent rod 14, a spring 15, a special-shaped ring 16, an arc section 17, a thread cutting section 18, a reset section 19, a connecting rod 20, a roller three 21, a presser foot 22 and a roller two 23.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1-3, the sewing machine comprises a cloth feeding mechanism 1, a thread cutting mechanism 2 and a presser foot lifting mechanism 3, the sewing machine further comprises a motor 4, the motor 4 is a double-headed motor 4, a crank I5 for driving the presser foot 22 to move upwards is arranged on one end part of an output shaft of the motor 4, and a rotary table 6 for driving the cloth feeding mechanism 1 to feed cloth and a crank II 7 for driving the thread cutting mechanism 2 to cut threads are arranged on the other end part of the output shaft of the motor 4.

When the sewing machine works, the motor 4 drives the rotary table 6 to reciprocate, the swinging rotary table 6 drives the cloth feeding mechanism 1 to swing, so that cloth feeding teeth on the cloth feeding mechanism 1 do elliptical motion, and cloth feeding is realized; when a wire is needed to be cut, the motor 4 drives the rotary table 6 to rotate by a larger angle, the rotary table 6 is separated from the cloth feeding mechanism 1, the cloth feeding mechanism 1 stops feeding, the crank II 7 drives the wire cutting mechanism 2 to act, the wire cutting mechanism 2 cuts off the wire on the cloth, the motor 4 drives the crank I5, the crank I5 drives the presser foot lifting mechanism 3 to swing, the presser foot lifting mechanism 3 drives the presser foot 22 to move upwards, the presser foot lifting is realized, the motor 4 continues to rotate, after the crank II rotates to a certain angle, the wire cutting mechanism 2 resets, after the motor 4 rotates for a circle, the rotary table 6 is contacted with the cloth feeding mechanism 1 again, and the rotary table 6 continues to swing back and forth and drives the cloth feeding mechanism 1 to swing, and cloth feeding is continued.

Preferably, the motor 4 is a stepper motor.

As shown in fig. 2 and 4, in this embodiment, the cloth feeding mechanism 1 is provided with a swing rod 8, the swing rod 8 is connected with a roller one 9, a groove 10 is formed on the periphery of the turntable 6, and when the roller one 9 is clamped in the groove 10, the turntable 6 can push the swing rod 8 to swing.

In the structure, the first roller 9 on the swing rod 8 can be clamped in the groove 10 of the turntable 6, and when the motor 4 drives the turntable 6 to swing reciprocally, the turntable 6 drives the cloth feeding mechanism 1 to swing through the first roller 9 and the swing rod 8, so that cloth feeding is realized.

As shown in fig. 2, in this embodiment, a bracket 11 is mounted on one end of the motor 4, the bracket 11 has two oppositely disposed bosses 12, and the roller 9 is located between the two bosses 12 and can abut against the bosses 12.

When cloth is fed, the first roller 9 swings back and forth between the two oppositely arranged bosses 12, the bosses 12 play a limiting role on the first roller 9, and the structure can limit the swinging angle of the first roller 9 to be in a proper range, so that the swinging amplitude of the cloth feeding teeth during cloth feeding is adjusted; when the wire needs to be cut, after the motor 4 drives the rotary table 6 to rotate by a larger angle, the first roller 9 abuts against one boss 12 after rotating along with the rotary table 6, the rotary table 6 continues to rotate, the first roller 9 stops rotating, then the rotary table 6 is separated from the first roller 9, and the cloth feeding mechanism 1 stops feeding cloth.

In this embodiment, as shown in fig. 5, the boss 12 is screwed with a bolt 13, the screw of the bolt 13 is penetrated out from the boss 12, and the roller one 9 can be abutted against the screw or one boss 12.

In this structure, when feeding cloth, roller one 9 swings reciprocally between the screw and one boss 12, and the screw and boss 12 play a limiting role on roller one 9. The bolt 13 on one boss 12 is rotated, and the swing angle of the roller I9 can be adjusted according to the requirement by adjusting the relative position of the screw rod and the other boss 12, so that the swing amplitude of the feed dog during feed is adjusted, and the smoothness during feed is improved.

In this embodiment, as shown in fig. 1, a curved lever 14 is mounted on the swing rod 8, a spring 15 is connected to the outer end of the curved lever 14 and the bracket 11, and the spring 15 is in a stretched state and makes the roller one 9 have a tendency to abut against the peripheral edge of the turntable 6 or the groove 10.

In this structure, the stretched spring 15 applies a force to the roller one 9 through the curved bar 14, and the force makes the roller one 9 always lean against the periphery of the turntable 6 or the groove 10 of the turntable 6, and the structure makes the roller one 9 in soft contact with the turntable 6, and the roller one 9 is tightly clamped in the groove 10, so that the roller one 9 is not easy to fall off, and a good transmission effect is ensured.

As shown in fig. 2 and 6, in this embodiment, the wire cutting mechanism 2 includes a swinging special-shaped ring 16, the special-shaped ring 16 includes an arc section 17, a cutting section 18 and a resetting section 19, one end of the second crank 7 is provided with a second roller 23, the second roller 23 is located in the special-shaped ring 16, and when the second roller 23 abuts against the cutting section 18, the second roller 23 can push the special-shaped ring 16 to swing.

The second roller 23 is located inside the special-shaped ring 16, when the cloth is fed, the second roller 23 swings in the arc-shaped section 17, the motion track of the second roller 23 is consistent with the extending direction of the arc-shaped section 17, the second roller 23 does not push the special-shaped ring 16 to swing even though being in contact with the arc-shaped section 17, the second roller 2 does not act, when the second roller 23 is required to cut a line, the motor 4 drives the turntable 6 to rotate for a larger angle, the first roller 9 abuts against one boss 12 after rotating along with the turntable 6, the turntable 6 continues to rotate, the first roller 9 stops rotating, the turntable 6 is separated from the first roller 9, the cloth feeding mechanism 1 stops feeding, the second roller 23 swings to the cutting section 18 and abuts against the cutting section 18, the special-shaped ring 16 is pushed to swing through the cutting section 18, the special-shaped ring 16 drives the cutting mechanism 2 to act, the cutting mechanism 2 cuts a line on the cloth, the motor 4 continues to rotate, the second roller 23 moves to the resetting section 19, the first roller 9 on the turntable 8 is clamped in the groove 10 of the turntable 6 after the rotation of the motor 4 starts to reset, the first roller 4 swings, the first roller 9 on the swinging rod 6 again after the rotation of the motor 4 stops rotating one circle, the first roller 4 abuts against the second roller 1 after the second roller 4 swings, and the second roller 4 continues to swing through the cutting section 1 to swing along the cutting section 17, and the second roller 23 continues to swing along the swing track when the cutting section 17 is not consistent with the cutting section 1 moves.

When the second roller 23 moves to the reset segment 19, if the wire cutting mechanism 2 does not start to reset, the second roller 23 rotates to the arc segment 17 and then pushes the special-shaped ring 16 to swing reversely, so that the wire cutting mechanism 2 gradually resets until the motion track of the second roller 23 is consistent with the extending direction of the arc segment 17, and the wire cutting mechanism 2 does not act.

As shown in fig. 1 and 3, in the present embodiment, the presser foot lifting mechanism 3 is provided with a connecting rod 20, and one end of the crank one 5 is provided with a roller three 21, and the roller three 21 can abut against the connecting rod 20 and push the connecting rod 20 to swing.

When the motor 4 drives the crank one 5 to swing, the crank one 5 pushes the connecting rod 20 to swing upwards through the roller three 21, and the connecting rod 20 drives the presser foot 22 to move upwards through the presser foot lifting mechanism 3, so that the presser foot is lifted.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (8)

1. The utility model provides a sewing machine, sewing machine includes work feed mechanism (1), cuts line mechanism (2) and lifts presser foot mechanism (3), its characterized in that, sewing machine still includes motor (4), motor (4) are double-end motor (4), install crank one (5) that drive presser foot (22) upwards moved on one tip of the output shaft of motor (4), install the drive on the other tip of the output shaft of motor (4) carousel (6) and the drive that work feed mechanism (1) work feed cut line of line mechanism (2) crank two (7).

2. The sewing machine according to claim 1, wherein the cloth feeding mechanism (1) is provided with a swinging rod (8), the swinging rod (8) is connected with a roller I (9), the periphery of the rotary table (6) is provided with a groove (10), and when the roller I (9) is clamped in the groove (10), the rotary table (6) can push the swinging rod (8) to swing.

3. A sewing machine according to claim 2, characterized in that a bracket (11) is mounted on one end of the motor (4), the bracket (11) having two oppositely disposed bosses (12), the roller one (9) being located between the two bosses (12) and being capable of resting against the bosses (12).

4. A sewing machine according to claim 3, characterized in that the boss (12) is screwed with a bolt (13), the shank of the bolt (13) being threaded out of the boss (12), the roller one (9) being able to rest against the shank or against a boss (12).

5. A sewing machine according to claim 2, characterized in that the rocker (8) is provided with a curved bar (14), the outer end of the curved bar (14) and the support (11) are connected with a spring (15), the spring (15) is in tension and the roller one (9) has a tendency to abut against the peripheral edge of the turntable (6) or the groove (10).

6. A sewing machine according to claim 1, wherein the thread cutting mechanism (2) comprises a swingable profiled ring (16), the profiled ring (16) comprises an arc-shaped section (17), a cutting section (18) and a resetting section (19) which are connected on one side, a roller two (23) is mounted on one end of the crank two (7), the roller two (23) is located in the profiled ring (16), and when the roller two (23) abuts against the cutting section (18), the roller two (23) can push the profiled ring (16) to swing.

7. A sewing machine according to claim 1, wherein the presser foot lifting mechanism (3) is provided with a connecting rod (20), one end of the crank one (5) is provided with a roller three (21), and the roller three (21) can abut against the connecting rod (20) and push the connecting rod (20) to swing.

8. A sewing machine according to claim 1, characterized in that the motor (4) is a stepper motor.

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