CN215404921U

CN215404921U - Cloth cutting mechanism of sewing machine

Info

Publication number: CN215404921U
Application number: CN202121852041.5U
Authority: CN
Inventors: 周荆生; 梅晓靖; 陈代银; 何莎莎; 张晓峰; 梅红
Original assignee: Zhejiang Hover Tech Sewing Machine Co ltd
Current assignee: Zhejiang Hover Tech Sewing Machine Co ltd
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2022-01-04
Anticipated expiration: 2031-08-09

Abstract

The utility model belongs to the technical field of sewing machines, in particular to a cloth cutting mechanism of a sewing machine, which comprises a machine shell, a needle plate arranged on the machine shell and a feed dog shaft which is rotatably connected on the machine shell and is in transmission fit with the feed dog mechanism, wherein a cutter shaft is rotatably connected on the machine shell, the cutter shaft is in transmission fit with the feed dog shaft through a linkage component, a fixed cutter frame with a fixed cutter is arranged on the machine shell, a movable cutter frame is sleeved on the cutter shaft, a movable cutter matched with the fixed cutter is fixed at the outer end of the movable cutter frame, and the movable cutter and the fixed cutter are arranged on one side of the needle plate. The cloth cutting mechanism is characterized in that the cloth cutting mechanism is provided with a cloth feeding mechanism, a cloth cutting mechanism is arranged on the cloth feeding mechanism, a cloth cutting knife shaft is arranged on the cloth feeding mechanism, and the cloth feeding mechanism is arranged on the cloth feeding mechanism.

Description

Cloth cutting mechanism of sewing machine

The technical field is as follows:

the utility model belongs to the technical field of sewing machines, and particularly relates to a cloth cutting mechanism of a sewing machine.

Background art:

in the sewing process of products such as T-shirts, shorts, underpants and the like, the cylindrical structures such as waistlines, cuffs, trouser mouths and the like need to be folded back to the back side by a specified width, and then the cloth is fed into a needle plate needle falling position of a sewing machine to sew folded edges of the cloth. After sewing, the folded cloth with the specified width needs to be cut, so that the sewing and cutting rate is low, the processing efficiency is low, the labor cost is high, and the operation is inconvenient.

The utility model content is as follows:

the utility model aims to provide a cloth cutting mechanism of a sewing machine, which can cut folded cloth along with sewing of the sewing machine and can effectively accelerate sewing processing efficiency of clothing products.

The utility model is realized by the following steps:

the utility model provides a sewing machine cloth cutting mechanism, including the casing, set up faller on the casing and rotate to be connected on the casing and with feed mechanism transmission complex feed lifting teeth axle, it is connected with the cutter axle to rotate on the casing, is connected through linkage assembly transmission between cutter axle and the feed lifting teeth axle, is equipped with the stationary knife rest that has the stationary knife on the casing, and the cover is equipped with on the cutter axle moves the knife rest, moves the outer end of knife rest and is fixed with and moves the sword with stationary knife matched with, just moves sword and stationary knife setting in one of them side of faller.

In the cloth cutting mechanism of the sewing machine, the linkage assembly comprises a driving crank, the inner end of the driving crank is fixedly sleeved on the feed lifting shaft, the outer end of the driving crank is hinged with one end of a connecting rod, the other end of the connecting rod is hinged with one end of a driven crank, and the other end of the driven crank is fixedly sleeved on the cutter shaft.

In the cloth cutting mechanism of the sewing machine, the driving crank sequentially comprises an inner end part, an extension part and an outer end part from head to tail, the extension part is arranged along the axial direction of the feed lifting rock shaft, and a movable groove with a certain gap with the feed lifting rock shaft is formed in the side wall of the extension part facing the feed lifting rock shaft.

In the cloth cutting mechanism of the sewing machine, the shell is fixedly provided with the air suction pipe, a material suction port of the air suction pipe corresponds to the positions of the movable knife and the fixed knife, the air suction pipe is provided with the negative pressure air passage of which the inner end is communicated with the inner cavity of the air suction pipe and the inner end port faces the material discharge port of the air suction pipe, and the outer end of the negative pressure air passage is communicated with an external air source.

In the above cloth cutting mechanism of the sewing machine, the air suction pipe is made of a transparent material.

In the cloth cutting mechanism of the sewing machine, the cutter shaft rotates through the supporting sleeve and can be connected to the machine shell in an axially sliding mode, the driven crank is hinged to the connecting rod through the pin shaft and can axially slide on the pin shaft, the limiting ring sleeve is arranged at one end of the cutter shaft, the reset spring is arranged between the limiting ring sleeve and the sleeve, and the corresponding end of the cutter shaft is pressed to overcome the elastic force of the reset spring so as to drive the movable cutter holder and the movable cutter to move away from the fixed cutter.

In the cloth cutting mechanism of the sewing machine, the limit ring sleeve is connected with the cutter shaft through threads, and the limit ring sleeve is screwed inwards or outwards so as to adjust the elastic force of the return spring.

In the cloth cutting mechanism of the sewing machine, the cutter seat is fixed on the machine shell, and the cutter shaft is rotatably connected to the cutter seat.

In the cloth cutting mechanism of the sewing machine, the cloth pressing plate is arranged above the needle plate, the shell is rotatably connected with the cloth pressing shaft, the connecting end of the cloth pressing plate is fixed on the cloth pressing shaft, the cloth pressing shaft is sleeved with the lifting linkage rod, and the cloth pressing torsion spring is arranged between the cloth pressing shaft and the shell.

Compared with the prior art, the utility model has the outstanding advantages that:

the cloth cutting mechanism is characterized in that the cloth cutting mechanism is provided with a cloth feeding mechanism, a cloth cutting mechanism is arranged on the cloth feeding mechanism, a cloth cutting knife shaft is arranged on the cloth feeding mechanism, and the cloth feeding mechanism is arranged on the cloth feeding mechanism.

Description of the drawings:

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

FIG. 2 is a perspective view of the cloth cutting mechanism of the present invention;

FIG. 3 is a cross-sectional view of the cloth cutting mechanism of the present invention;

FIG. 4 is a perspective view of a non-pressure panel of the present invention;

fig. 5 is a perspective view of the drive crank of the present invention.

In the figure: 1. a housing; 2. a needle plate; 3. a feed lifting shaft; 4. a cutter shaft; 5. fixing a cutter; 6. a fixed tool rest; 7. a movable knife rest; 8. moving a knife; 9. a drive crank; 10. a connecting rod; 11. a driven crank; 12. an inner end portion; 13. an extension portion; 14. an outer end portion; 15. a movable groove; 16. an air suction pipe; 17. a negative pressure airway; 18. a support sleeve; 19. a pin shaft; 20. a spacing ring sleeve; 21. a return spring; 22. a cutter seat; 23. a cloth pressing plate; 24. a cloth pressing shaft; 25. lifting the linkage rod; 26. cloth pressing torsion spring.

The specific implementation mode is as follows:

the utility model will now be further described by way of specific examples, with reference to figures 1 to 5:

the utility model provides a sewing machine cloth cutting mechanism, including casing 1, setting faller 2 and the rotation of setting on casing 1 connect on casing 1 and with feed mechanism transmission complex feed lifting teeth axle 3, the rotation is connected with cutter axle 4 on casing 1, is connected through the linkage subassembly transmission between cutter axle 4 and the feed lifting teeth axle 3, is equipped with stationary knife rest 6 that has stationary knife 5 on casing 1, and the cover is equipped with on cutter axle 4 moves knife rest 7, moves the outer end of knife rest 7 and is fixed with and moves knife 8 with stationary knife 5 matched with, and moves knife 8 and stationary knife 5 setting in one of them side of faller 2. Wherein, the circumferential direction swing of cutter shaft 4 drives the circumferential direction swing of feed lifting shaft 3 through the linkage subassembly, and then drives and moves knife rest 7 and move the luffing motion of knife 8, and its moves knife 8 and stationary knife 5's cooperation down, can effectively tailor the cloth that turns back of faller 2 department to in this embodiment, stationary knife 5 seat is through the axle sleeve suit on cutter shaft 4, and it can not rotate along with cutter shaft 4, and stationary knife 5 is fixed to the one end of stationary knife 5 seat, and the other end passes through the pin to be fixed on casing 1.

The cloth cutting mechanism is characterized in that the cloth cutting shaft 4 is used as a power source of the cloth cutting mechanism, the movable knife 8 and the fixed knife 5 can be stably driven to be matched to cut the folded cloth, the cloth cutting mechanism can also synchronously work with the cloth feeding mechanism, the cloth feeding sewing and the cloth cutting of the sewing machine are consistent, the work is stable, the transmission is reliable, and the sewing and processing efficiency of clothing products is effectively improved.

Wherein, the linkage subassembly can adopt common gear train transmission, and in this embodiment, the concrete structure that the linkage subassembly adopted is: the linkage assembly comprises a driving crank 9, the inner end of the driving crank 9 is fixedly sleeved on the feed lifting shaft 3, the outer end of the driving crank 9 is hinged with one end of a connecting rod 10, the other end of the connecting rod 10 is hinged with one end of a driven crank 11, and the other end of the driven crank 11 is fixedly sleeved on the cutter shaft 4. Meanwhile, limited by the setting position of the cutter mechanism and the space required by transmission, in order to be directly matched with the feed lifting shaft 3 with the existing size, the driving crank 9 sequentially comprises an inner end part 12, an extension part 13 and an outer end part 14 from head to tail, the extension part 13 is arranged along the axial direction of the feed lifting shaft 3, and a movable groove 15 with a certain gap with the feed lifting shaft 3 is formed on the side wall of the extension part 13 facing the feed lifting shaft 3. Namely, by means of the structure of the extension part 13 and the movable groove 15 of the driving crank 9, the axial position of the feed lifting shaft 3 for transmission to the cutter shaft 4 can be effectively prolonged on the premise of not influencing the normal transmission of the feed conveying mechanism driven by the feed lifting shaft 3.

In order to automatically remove the cut cloth and prevent the cut cloth from being accumulated on the table top of the sewing machine to influence normal sewing processing of the cloth, an air suction pipe 16 is fixed on the machine shell 1, the material suction port of the air suction pipe 16 corresponds to the positions of the movable knife 8 and the fixed knife 5, a negative pressure air passage 17 is arranged on the air suction pipe 16, the inner end of the negative pressure air passage 17 is communicated with the inner cavity of the air suction pipe 16, the inner end of the negative pressure air passage 17 faces the material discharge port of the air suction pipe 16, and the outer end of the negative pressure air passage 17 is communicated with an external air source. The air is blown towards the discharge port of the air suction pipe 16 through the negative pressure air passage 17 by means of an external air source, so that negative pressure is formed at the discharge port of the air suction pipe 16, and then cut cloth can be effectively sucked from the suction port of the air suction pipe 16 and finally discharged from the discharge port.

Meanwhile, in the present embodiment, the air suction pipe 16 is made of a transparent material in order to observe whether the cloth inside the air suction pipe 16 is clogged.

In addition, in order to separate the movable knife 8 from the fixed knife 5 so as to facilitate the taking out of the cloth and the later maintenance and replacement, the knife shaft 4 rotates through the supporting sleeve 18 and can be connected to the machine shell 1 in an axial sliding manner, the driven crank 11 is hinged to the connecting rod 10 through the pin shaft 19, the connecting rod 10 can axially slide on the pin shaft 19, one end of the knife shaft 4 is provided with a limit ring sleeve 20, a return spring 21 is arranged between the limit ring sleeve 20 and the sleeve, and the connecting rod 10 can axially slide on the pin shaft 19 as the pin shaft 19 is fixed on the driven crank 11, so that the corresponding end of the knife shaft 4 is pressed to overcome the elasticity of the return spring 21, and the movable knife holder 7 and the movable knife 8 can be driven to move away from the fixed knife 5.

Furthermore, in order to adjust the elastic force of the return spring 21 to adjust the force of the movable knife 8 against the fixed knife 5 so as to cut cloth quickly, the position-limiting ring sleeve 20 is connected with the knife shaft 4 through threads, and the position-limiting ring sleeve 20 is screwed inwards or outwards to adjust the elastic force of the return spring 21.

Furthermore, in the present embodiment, a cutter seat 22 is fixed on the housing 1, the cutter shaft 4 is rotatably connected to the cutter seat 22, the driving crank 9 is located in the housing 1, the driven crank 11 is located in the cutter seat 22, and the connecting rod 10 is disposed through the housing 1 and the cutter seat 22.

In addition, in order to be matched with a presser foot of the sewing machine and the needle plate 2 so as to facilitate sewing and cutting of cloth, the sewing machine further comprises a cloth pressing plate 23 arranged above the needle plate 2, a cloth pressing shaft 24 is rotatably connected to the machine shell 1, the connecting end of the cloth pressing plate 23 is fixed on the cloth pressing shaft 24, a lifting linkage rod 25 is sleeved on the cloth pressing shaft 24, and a cloth pressing torsion spring 26 is arranged between the cloth pressing shaft 24 and the machine shell 1. The cloth pressing plate 23 is driven by the cloth pressing shaft 24 to be pressed on the cloth under the elasticity of the cloth pressing torsion spring 26, and the lifting linkage rod 25 can be manually rotated by an operator to overcome the elasticity of the cloth pressing torsion spring 26 and lift the cloth pressing plate 23 through the cloth pressing shaft 24.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered by the protection scope of the utility model.

Claims

1. The utility model provides a sewing machine cloth cutting mechanism, including casing (1), setting faller (2) on casing (1) and rotate to be connected on casing (1) and with feed mechanism transmission complex lifting teeth axle (3), its characterized in that: the improved needle bar structure is characterized in that a cutter shaft (4) is rotatably connected to the casing (1), the cutter shaft (4) and the feed lifting shaft (3) are connected through a linkage assembly in a transmission mode, a fixed cutter frame (6) with a fixed cutter (5) is arranged on the casing (1), a movable cutter frame (7) is sleeved on the cutter shaft (4), the outer end of the movable cutter frame (7) is fixed with a movable cutter (8) matched with the fixed cutter (5), and the movable cutter (8) and the fixed cutter (5) are arranged on one side of the needle plate (2).

2. The cloth cutting mechanism of a sewing machine according to claim 1, characterized in that: the linkage assembly comprises a driving crank (9) with the inner end fixedly sleeved on the feed lifting shaft (3), the outer end of the driving crank (9) is hinged with one end of a connecting rod (10), the other end of the connecting rod (10) is hinged with one end of a driven crank (11), and the other end of the driven crank (11) is fixedly sleeved on the cutter shaft (4).

3. The cloth cutting mechanism of a sewing machine according to claim 2, characterized in that: the driving crank (9) sequentially comprises an inner end part (12), an extension part (13) and an outer end part (14) from top to bottom, the extension part (13) is arranged along the axial direction of the feed lifting shaft (3), and a movable groove (15) with a certain gap with the feed lifting shaft (3) is formed in the side wall, facing the feed lifting shaft (3), of the extension part (13).

4. The cloth cutting mechanism of a sewing machine according to claim 1, characterized in that: an air suction pipe (16) is fixed on the machine shell (1), a material suction port of the air suction pipe (16) corresponds to the positions of the movable knife (8) and the fixed knife (5), a negative pressure air passage (17) is arranged on the air suction pipe (16), the inner end of the negative pressure air passage is communicated with the inner cavity of the air suction pipe (16), the inner end of the negative pressure air passage faces the material discharge port of the air suction pipe (16), and the outer end of the negative pressure air passage (17) is communicated with an external air source.

5. The cloth cutting mechanism of a sewing machine according to claim 4, characterized in that: the air suction pipe (16) is made of transparent materials.

6. The cloth cutting mechanism of a sewing machine according to claim 2, characterized in that: the cutter shaft (4) rotates through the supporting sleeve (18) and can be connected to the machine shell (1) in an axial sliding mode, the driven crank (11) is hinged to the connecting rod (10) through the pin shaft (19), the connecting rod (10) can axially slide on the pin shaft (19), a limiting ring sleeve (20) is arranged at one end of the cutter shaft (4), a return spring (21) is arranged between the limiting ring sleeve (20) and the sleeve, and the corresponding end of the cutter shaft (4) is pressed to overcome the elastic force of the return spring (21) so as to drive the movable cutter holder (7) and the movable cutter (8) to move away from the fixed cutter (5) in the direction.

7. The cloth cutting mechanism of a sewing machine according to claim 6, characterized in that: the limiting ring sleeve (20) is connected with the cutter shaft (4) through threads, and the limiting ring sleeve (20) is screwed inwards or outwards to adjust the elastic force of the return spring (21).

8. The cloth cutting mechanism of a sewing machine according to claim 2 or 6, characterized in that: a cutter seat (22) is fixed on the casing (1), and the cutter shaft (4) is rotatably connected to the cutter seat (22).

9. The cloth cutting mechanism of a sewing machine according to claim 1, characterized in that: the cloth pressing machine is characterized by further comprising a cloth pressing plate (23) arranged above the needle plate (2), a cloth pressing shaft (24) is rotatably connected onto the machine shell (1), the connecting end of the cloth pressing plate (23) is fixed onto the cloth pressing shaft (24), a lifting linkage rod (25) is sleeved on the cloth pressing shaft (24), and a cloth pressing torsion spring (26) is arranged between the cloth pressing shaft (24) and the machine shell (1).