CN217781409U

CN217781409U - One-driving-three driving mechanism of sewing machine

Info

Publication number: CN217781409U
Application number: CN202221778650.5U
Authority: CN
Inventors: 卢律何
Original assignee: Zhejiang Guanghe Sewing Machine Co ltd
Current assignee: Zhejiang Guanghe Sewing Machine Co ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-11-11
Anticipated expiration: 2032-07-08

Abstract

The utility model provides a three actuating mechanism are dragged to sewing machine's one belongs to sewing machine technical field. The one-to-three driving mechanism of the sewing machine comprises a stepping motor, wherein the stepping motor is connected with a pressure lifting foot component, a needle pitch adjusting component and a thread cutting component, the thread cutting component comprises a thread cutting cam, a thread cutting driving crank I, a thread cutting driving shaft, a thread cutting driving crank II, a thread cutting connecting rod I, a thread cutting crank I, a thread cutting shaft, a thread cutting crank II, a thread cutting connecting rod II, a thread cutting knife rest, a thread cutting movable knife and a thread cutting fixed knife which are sequentially connected, the thread cutting cam is fixedly connected to a motor shaft of the stepping motor, and the thread cutting movable knife and the thread cutting fixed knife are mutually opened and closed to cut threads. The stepping motor is used for controlling the actions of the presser foot lifting component, the needle pitch adjusting component and the thread trimming component, the number of driving sources is reduced, the structure is simpler and more compact, the occupied space is small, the installation is convenient, and the cost is reduced.

Description

One-driving-three driving mechanism of sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a sewing machine, especially a sewing machine's one drags three actuating mechanism is related to.

Background

At present, a thread cutting driving mechanism and a presser foot lifting mechanism on a sewing machine are two mutually independent mechanisms and are respectively driven by two driving sources, so that the defects of complex structure, large occupied space, high cost, inconvenient installation and the like are caused. Chinese patent [ grant publication number: CN106948096B discloses a thread cutting and presser foot lifting structure of a sewing machine and the sewing machine. Wherein the sewing machine trimming lifts presser foot structure includes: the double-end motor, the trimming cam assembly and the lifting and pressing foot crank assembly are arranged on the motor shaft, the trimming cam assembly comprises a trimming cam arranged on one end of the double-end motor, a moving groove is formed in the trimming cam, one end of the trimming cam is connected with the trimming cam through a connecting pin, the connecting pin is arranged in the moving groove of the trimming cam, the other end of the trimming cam is connected with a trimming shaft, and the trimming shaft is connected with the trimming mechanism; the presser foot lifting crank assembly comprises a presser foot lifting crank arranged on a motor shaft at the other end of the double-end motor, wherein the presser foot lifting crank is provided with a butting part, and the butting part is butted with a mandril of the presser foot lifting mechanism. The wire cutting mechanism and the presser foot lifting mechanism are controlled to act through one driving source, the driving source is reduced, the structure is simpler, the occupied space is small, the installation is convenient, and the cost is reduced. However, the double-head motor is adopted for driving, the distance between the thread cutting mechanism and the presser foot lifting mechanism is large, the structure is not compact enough, and the installation position of the double-head motor is limited, namely the double-head motor is required to be installed on the front side or the rear side of the machine shell, so that the use is inconvenient.

Disclosure of Invention

The utility model aims at solving the problems in the prior art and providing a one-to-three driving mechanism of a sewing machine.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a sewing machine's one drags three actuating mechanism, includes step motor, step motor is connected with and lifts presser foot subassembly, gauge needle adjusting part and trimming subassembly, its characterized in that, the trimming subassembly includes consecutive trimming cam, trimming drive crank one, trimming drive shaft, trimming drive crank two, trimming connecting rod one, trimming crank one, trimming axle, trimming crank two, trimming connecting rod two, trimming knife rest, trimming move the sword and the trimming stationary knife, the trimming cam links firmly on step motor's motor shaft, the trimming moves the sword and opens and shuts mutually with the trimming stationary knife and carries out the trimming.

In the one-to-three driving mechanism of the sewing machine, the trimming cam is of a circular plate-shaped structure, a raised driving block is arranged on the peripheral wall of the trimming cam, one end of the trimming driving crank I is fixedly connected to the trimming driving shaft, the side face of the other end of the trimming driving crank I is hinged with a ball, and the ball abuts against the peripheral wall of the trimming cam.

In the above one-driving-three driving mechanism of the sewing machine, the driving block is in an acute triangle shape

In the one-to-three driving mechanism of the sewing machine, the first trimming driving crank and the second trimming driving crank are fixedly connected to the trimming driving shaft, one end of the first trimming connecting rod is hinged to the second trimming driving crank, the other end of the first trimming connecting rod is hinged to the first trimming crank, the first trimming crank and the second trimming crank are fixedly connected to the trimming shaft, one end of the second trimming connecting rod is hinged to the second trimming crank, the other end of the second trimming connecting rod is hinged to the trimming knife rest, and the trimming moving knife is fixedly connected to the trimming knife rest.

In the one-to-three driving mechanism of the sewing machine, the thread cutting driving shaft and the thread cutting shaft are both connected to a shell of the sewing machine and can rotate around the axes of the thread cutting driving shaft and the thread cutting shaft.

In the one-driving-three driving mechanism of the sewing machine, the thread cutting movable cutter is provided with a cutter rest shaft hole, the cutter rest shaft hole is used for inserting the lower shaft, and the thread cutting fixed cutter is fixedly connected to the shell of the sewing machine.

In foretell sewing machine's a drive mechanism that drags three, gauge needle regulating assembly includes gauge needle crank, gauge needle connecting rod, gauge needle pull rod and reset spring, the gauge needle crank links firmly on step motor's motor shaft, the upper end of gauge needle connecting rod articulates on sewing machine's casing, and the lower extreme articulates with the upper end of gauge needle pull rod mutually, the lower extreme of gauge needle pull rod articulates on gauge needle swing seat, it is connected with the gauge needle gyro wheel to rotate on the gauge needle connecting rod, the gauge needle gyro wheel supports and leans on gauge needle crank's perisporium, reset spring's upper end is connected on the gauge needle pull rod, and the lower extreme links firmly on sewing machine's casing.

In the one-driving-three driving mechanism of the sewing machine, the thread trimming cam is fixedly connected with the needle pitch crank.

In the one-to-three driving mechanism of the sewing machine, the presser foot lifting component comprises a presser foot lifting cam and a presser foot lifting connecting rod, the presser foot lifting cam is fixedly sleeved on a motor shaft of the stepping motor, and one end of the presser foot lifting connecting rod is abutted against the presser foot lifting cam.

In the one-driving-three driving mechanism of the sewing machine, the pressure foot lifting cam, the needle pitch crank and the thread trimming cam are sequentially sleeved on a motor shaft of the stepping motor from inside to outside.

Compared with the prior art, the utility model discloses a step motor control lifts the action of presser foot subassembly, gauge needle adjusting part and trimming subassembly, and driving source quantity reduces, and the structure is simpler and compact, and occupation space is little, simple to operate moreover, the cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of another angle of the present invention.

In the figure, 1, a stepping motor; 2. a ball bearing; 3. a needle pitch link; 4. a needle pitch pull rod; 5. a return spring; 6. a needle pitch swing seat; 7. a fixing plate; 8. a needle pitch crank; 9. a gauge roller; 10. a trimming cam; 1001. a drive block; 11. the trimming driving crank I; 12. a thread trimming drive shaft; 13. a trimming driving crank II; 14. a first trimming connecting rod; 15. a first trimming crank; 16. a thread cutting shaft; 17. a second trimming crank; 18. a second trimming connecting rod; 19. trimming and moving the knife; 1901. a tool holder shaft hole; 21. trimming and fixing a cutter; 22. lifting a presser foot cam; 23. lifting a presser foot connecting rod; 24. a shaft sleeve; 25. and (7) a pin shaft.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Referring to fig. 1 and 2, the present embodiment is a one-to-three driving mechanism of a sewing machine, which includes a stepping motor 1, a presser foot lifting assembly, a needle pitch adjusting assembly and a thread cutting assembly. The presser foot lifting component comprises a presser foot lifting cam 22 and a presser foot lifting connecting rod 23, the presser foot lifting cam 22 is fixedly sleeved on a motor shaft of the stepping motor 1, one end of the presser foot lifting connecting rod 23 abuts against the presser foot lifting cam 22, and the presser foot lifting connecting rod 23 is used for driving a presser foot of the sewing machine to move; the needle pitch adjusting assembly comprises a needle pitch crank 8, a needle pitch connecting rod 3, a needle pitch pull rod 4 and a return spring 5, the needle pitch crank 8 is fixedly connected to a motor shaft of the stepping motor 1, the upper end of the needle pitch connecting rod 3 is connected to a shaft sleeve 24 through a pin shaft 25, the shaft sleeve 24 is fixedly connected to a shell of the sewing machine, the shaft sleeve 24 and the motor shaft are arranged in parallel, namely the upper end of the needle pitch connecting rod 3 is hinged to the shell of the sewing machine, the lower end of the needle pitch connecting rod 3 is hinged to the upper end of the needle pitch pull rod 4, the lower end of the needle pitch pull rod 4 is hinged to a needle pitch swinging seat 6, the needle pitch swinging seat 6 is rotatably connected to the needle pitch connecting rod 3 and provided with a needle pitch roller 9, the needle pitch roller 9 abuts against the peripheral wall of the needle pitch crank 8, the upper end of the return spring 5 is connected to the needle pitch pull rod 4, and the lower end of the return spring is fixedly connected to a fixing plate 7 on the shell of the sewing machine; the thread cutting assembly comprises a thread cutting cam 10, a thread cutting driving crank I11, a thread cutting driving shaft 12, a thread cutting driving crank II 13, a thread cutting connecting rod I14, a thread cutting crank I15, a thread cutting shaft 16, a thread cutting crank II 17, a thread cutting connecting rod II 18, a thread cutting tool rest 19, a thread cutting movable tool 20 and a thread cutting fixed tool 21 which are connected in sequence, the thread cutting cam 10 is fixedly connected to a motor shaft of the stepping motor 1, and the thread cutting movable tool 20 and the thread cutting fixed tool 21 are opened and closed to cut threads. The pressure foot lifting cam 22, the needle pitch crank 8 and the thread trimming cam 10 are sequentially sleeved on a motor shaft of the stepping motor 1 from inside to outside, and the thread trimming cam 10 is fixedly connected with the needle pitch crank 8 through screws.

Preferably, the trimming cam 10 is a circular plate-shaped structure, a raised driving block 1001 is arranged on the peripheral wall of the trimming cam 10, the driving block 1001 is in an acute triangle shape, one end of the trimming driving crank I11 is fixedly connected to the trimming driving shaft 12, the side face of the other end is hinged with the ball 2, and the ball 2 abuts against the peripheral wall of the trimming cam 10.

Preferably, the first trimming drive crank 11 and the second trimming drive crank 13 are both fixedly connected to the trimming drive shaft 12, one end of the first trimming connecting rod 14 is hinged to the second trimming drive crank 13, the other end of the first trimming connecting rod is hinged to the first trimming crank 15, the first trimming crank 15 and the second trimming crank 17 are both fixedly connected to the trimming shaft 16, one end of the second trimming connecting rod 18 is hinged to the second trimming crank 17, the other end of the second trimming connecting rod is hinged to the trimming knife rest 19, and the trimming moving knife 20 is fixedly connected to the trimming knife rest 19.

Preferably, the thread cutting drive shaft 12 and the thread cutting bobbin 16 are both connected to the housing of the sewing machine, and the thread cutting drive shaft 12 and the thread cutting bobbin 16 are both capable of rotating around their axes.

Preferably, the movable trimming knife 20 has a knife rest shaft hole 1901, the knife rest shaft hole 1901 is used for inserting a lower shaft connected with a machine shell of the sewing machine, and the fixed trimming knife 21 is fixedly connected with the machine shell of the sewing machine.

The working principle of the embodiment is as follows: when a motor shaft of the stepping motor 1 rotates, the pressure raising and pressing foot cam 22 can be driven to rotate, so that the pressure raising and pressing foot connecting rod 23 rotates, and the structure is the prior art; when a motor shaft rotates, the needle pitch crank 8 can be driven to rotate at the same time, in the rotating process of the needle pitch crank 8, the needle pitch roller 9 which is abutted against the peripheral wall drives the needle pitch connecting rod 3 and the needle pitch pull rod 4 to move, the needle pitch connecting rod 3 rotates around the axis of the pin shaft 25, the needle pitch pull rod 4 goes up and down along with the needle pitch connecting rod 3, and meanwhile, the needle pitch swing seat 5 is driven to swing, so that the needle pitch is adjusted; the trimming cam 10 rotates along with the motor shaft along with the stitch crank 8, so as to drive the trimming driving crank I11, the trimming driving shaft 12 and the trimming driving crank II 13 to rotate around the axial lead of the trimming driving shaft 12, in the rotating process of the trimming driving crank II 13, the trimming connecting rod I14 drives the trimming crank I15, the trimming shaft 16 and the trimming crank II 17 to rotate around the axial lead of the trimming shaft 16, in the rotating process of the trimming crank II 17, the trimming connecting rod II 18 drives the trimming movable knife 20 to rotate around a lower shaft fixedly connected on the machine shell, and the trimming movable knife 20 is opened and closed relative to the trimming stationary knife 21 to trim wires.

This embodiment can lift presser foot subassembly, gauge needle adjusting part and the action of trimming subassembly through same step motor 1 simultaneously, and driving source quantity reduces, and the structure is simpler and compact, and occupation space is little, simple to operate moreover, the cost is reduced.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a sewing machine's one drags three actuating mechanism, includes step motor (1), step motor (1) is connected with and lifts presser foot subassembly, gauge needle adjusting part and trimming subassembly, its characterized in that, the trimming subassembly includes consecutive trimming cam (10), trimming drive crank (11), trimming drive shaft (12), trimming drive crank two (13), trimming connecting rod one (14), trimming crank one (15), trimming axle (16), trimming crank two (17), trimming connecting rod two (18), trimming knife rest (19), trimming move sword (20) and trimming stationary knife (21), trimming cam (10) link firmly on step motor's (1) motor shaft, trimming moves sword (20) and trimming stationary knife (21) and opens and shuts mutually and carries out the trimming.

2. The one-for-three driving mechanism of the sewing machine as claimed in claim 1, wherein the trimming cam (10) is a circular plate structure, a raised driving block (1001) is provided on the peripheral wall of the trimming cam (10), one end of the trimming driving crank (11) is fixedly connected to the trimming driving shaft (12), the side surface of the other end is hinged with a ball (2), and the ball (2) abuts against the peripheral wall of the trimming cam (10).

3. A drive mechanism for a sewing machine according to claim 2 wherein the drive block (1001) is of acute triangular shape.

4. The one-driving-three driving mechanism of the sewing machine according to claim 2, wherein the first trimming driving crank (11) and the second trimming driving crank (13) are both fixedly connected to the trimming driving shaft (12), one end of the first trimming connecting rod (14) is hinged to the second trimming driving crank (13), the other end of the first trimming connecting rod is hinged to the first trimming crank (15), the first trimming crank (15) and the second trimming crank (17) are both fixedly connected to the trimming shaft (16), one end of the second trimming connecting rod (18) is hinged to the second trimming crank (17), the other end of the second trimming connecting rod is hinged to the trimming knife rest (19), and the trimming moving knife (20) is fixedly connected to the trimming knife rest (19).

5. The one-driving-three driving mechanism of sewing machine according to claim 4, wherein the thread cutting driving shaft (12) and the thread cutting bobbin (16) are both connected to the housing of the sewing machine, and the thread cutting driving shaft (12) and the thread cutting bobbin (16) are both capable of rotating around their axes.

6. The one-driving-three driving mechanism of sewing machine according to claim 4, wherein the movable trimming cutter (20) has a cutter holder shaft hole (1901), the cutter holder shaft hole (1901) is used for inserting a lower shaft, and the fixed trimming cutter (21) is fixedly connected to the machine shell of the sewing machine.

7. The one-to-three driving mechanism of the sewing machine according to any one of claims 1 to 6, wherein the needle pitch adjusting assembly comprises a needle pitch crank (8), a needle pitch connecting rod (3), a needle pitch pull rod (4) and a return spring (5), the needle pitch crank (8) is fixedly connected to a motor shaft of the stepping motor (1), the upper end of the needle pitch connecting rod (3) is hinged to a housing of the sewing machine through a pin shaft (25), the lower end of the needle pitch connecting rod is hinged to the upper end of the needle pitch pull rod (4), the lower end of the needle pitch pull rod (4) is hinged to a needle pitch swing seat (6), the needle pitch connecting rod (3) is rotatably connected with a needle pitch roller (9), the needle pitch roller (9) abuts against a peripheral wall of the needle pitch crank (8), the upper end of the return spring (5) is connected to the needle pitch pull rod (4), and the lower end of the return spring is fixedly connected to the housing of the sewing machine.

8. A three-drive mechanism for sewing machines according to claim 7, characterized in that the trimming cam (10) is solidly connected to the gauge crank (8).

9. The one-driving-three driving mechanism of sewing machine according to claim 8, wherein the presser foot lifting assembly comprises a presser foot lifting cam (22) and a presser foot lifting connecting rod (23), the presser foot lifting cam (22) is fixedly sleeved on the motor shaft of the stepping motor (1), and one end of the presser foot lifting connecting rod (23) abuts against the presser foot lifting cam (22).

10. The one-driving-three driving mechanism of sewing machine according to claim 9, characterized in that the pressure foot lifting cam (22), the needle pitch crank (8) and the thread cutting cam (10) are sequentially sleeved on the motor shaft of the stepping motor (1) from inside to outside.