CN212834443U

CN212834443U - Cloth cutting structure in sewing machine

Info

Publication number: CN212834443U
Application number: CN202021259330.XU
Authority: CN
Inventors: 林群伟; 林晨帅
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Meiji Technology Group Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-03-30
Anticipated expiration: 2030-06-30

Abstract

The utility model provides a cloth cutting structure in sewing machine belongs to sewing equipment technical field. The technical problems that burrs are prone to falling and edges are prone to being connected during processing of the lock hole of an existing sewing machine are solved. The sewing machine comprises a needle plate assembly, and the cloth cutting structure comprises a driving motor and a cutter shaft capable of moving up and down; the reciprocating rotation of the output shaft of the driving motor and the driving block is fixedly arranged on the output shaft of the driving motor, the driving block can be driven to swing, the driving block is connected with the cutter shaft through a driving connecting rod, the cutter shaft can be driven to swing through the driving block, the cutter is fixedly arranged at the lower end of the cutter shaft and is located right above the needle plate assembly, the lower end of the cutter is provided with a sharp blade, one side of the cutter is provided with a cloth cutting blade, and the cloth cutting blade is connected with the sharp blade. The utility model provides a cloth cutting structure has avoided the sunken deckle edge in button hole both sides, also can not produce and connects the edge of a knife, and the cutter is when the up-and-down motion cutting button hole in addition, and the stroke displacement is short, can improve the frequency of its motion to improve its machining efficiency.

Description

Cloth cutting structure in sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a cloth cutting structure among sewing machine is related to.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. A sewing machine generally includes a needle bar mechanism, a thread take-up mechanism, a feed mechanism, a thread hooking mechanism, a hold-down mechanism, a winding device, a lubricating device, and the like. The sewing machines can be classified into a flat sewing machine, a chain sewing machine, a overedger, a buttonhole sewing machine, a bag sealing machine and the like according to the structural mode or the sewing process mode. The buttonhole sewing machine is one kind of sewing machine used in clothing making industry and is used mainly in making buttonholes in various kinds of clothing. In the sewing process, holes need to be formed in the cloth, and in order to improve the hole forming efficiency, a cloth cutting structure is often arranged on the buttonholing machine. When the prior cloth cutting structure is used for cutting cloth at a keyhole opening, one-time cutting or multiple-time cutting is usually finished, and only a relatively short and small opening can be cut by one-time cutting; when the sewing cloth is pierced by the lower knife for many times, burrs are easy to sink on two sides of the buttonhole, and when the buttonhole is long, a cutting edge is usually generated.

Chinese patent literature data (application number: 201320860506.0; grant publication number: CN203683882U) discloses a cloth cutting device in a flat-end buttonholing machine, the device is arranged on a nose of the buttonholing machine and comprises a cutter, a cutter shaft, a cutter motor and a guide plate fixedly connected in the nose, the cutter shaft is vertically arranged in the nose, the lower end of the cutter shaft extends out of the nose and is fixedly connected with the cutter, a guide structure capable of enabling the cutter shaft to translate along the axial direction of the cutter shaft is arranged between the guide plate and the cutter shaft, and the upper end of the cutter shaft is connected with a rotating shaft of the cutter motor through a connecting rod mechanism. The connecting rod mechanism comprises a first connecting rod and a second connecting rod, the first connecting rod is perpendicular to the rotating shaft of the cutter motor, one end of the first connecting rod is fixedly connected to the rotating shaft of the cutter motor, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the other end of the second connecting rod is hinged to the upper end of the cutter shaft.

The cloth cutting device in the patent document is easy to generate edge connecting and sinking burrs when the cloth cutting device is continuously fed for many times, and the product quality is influenced; meanwhile, the stroke of the cutter setting at each time is longer, and the production efficiency is influenced.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a cloth cutting structure in sewing machine, the utility model aims to solve the technical problem that: how to improve the product quality and the production efficiency of the keyhole opening.

The purpose of the utility model can be realized by the following technical proposal:

a cloth cutting structure in a sewing machine comprises a needle plate assembly, wherein the cloth cutting structure comprises a driving motor and a cutter shaft capable of moving up and down; the needle plate assembly cutting machine is characterized in that a driving block is fixedly arranged on an output shaft of the driving motor, the output shaft of the driving motor can drive the driving block to swing in a reciprocating mode, the driving block is connected with the cutter shaft through a driving connecting rod, the cutter shaft can be driven to move up and down in a swinging mode through the driving block, a cutter is fixedly arranged at the lower end of the cutter shaft and located right above the needle plate assembly, a sharp blade is arranged at the lower end of the cutter, a cloth cutting blade is arranged on one side of the cutter, and the cloth cutting blade is connected with the sharp blade.

The working principle is as follows: under the condition that the sewing machine stops or sews normally, the cutter and the cutter shaft are both in a rising state, so that the operation of other parts of the sewing machine is prevented from being influenced; when the lower knife is needed to be buttonhole opened, the driving motor firstly rotates a large angle to drive the driving block to swing a large amplitude, and further drives the knife shaft and the knife to descend by a large displacement, so that the knife penetrates into the cloth to be sewed by utilizing the sharp blade, the cloth cutting blade is aligned with the cloth to be sewed, then the driving motor slightly rotates at a positive angle and a negative angle, the driving motor rotates to enable the knife to do vertical reciprocating motion after the knife edge descends into the needle plate assembly, the cloth cutting blade of the knife cuts the opening in the cloth up and down, the knife is not completely separated from the cloth all the time, and after buttonhole opening is finished, the driving motor rotates a large angle to take back the knife. The cutter of the cloth cutting structure is provided with the sharp blade, smaller buttonholes can be sewn, meanwhile, the cloth can be continuously cut through the cloth cutting blade to realize the cutting processing of large buttonholes, the long buttonholes and the short buttonholes do not need to be changed, the cutter does not completely separate the cloth during working, and the material does not need to be pierced for many times, so that sinking burrs at two sides of the buttonholes are avoided, and a connecting blade is not generated; in addition, when the cutter moves up and down to cut the button holes, the stroke displacement is short, the movement frequency can be improved, and the processing efficiency is improved.

In the cloth cutting structure in the sewing machine, one end of the driving block is fixedly connected with an output shaft of the driving motor, the other end of the driving block extends outwards in the radial direction of the output shaft of the driving motor, the end of the driving block is hinged with one end of the driving connecting rod through a shaft position screw, the other end of the driving connecting rod is hinged with a connecting block, and the connecting block is sleeved on the cutter shaft and fixedly connected with the cutter shaft and the cutter shaft. The driving connecting rod is respectively connected with the driving block and the connecting block by shaft position screws, and the driving block and the connecting block can rotate flexibly.

In the cloth cutting structure in foretell sewing machine, the hole of stepping down of faller hole and bar has on the faller subassembly, the faller hole site in the one end in the hole of stepping down, the cutter can insert in the hole of stepping down and work as the cutter inserts when stepping down downtheholely, the cloth cutting sword orientation the faller hole. The feeding direction of the sewing material is matched, so that the opening and sewing of the sewing material keyhole are realized, and the efficiency is improved.

In the cloth cutting structure in the sewing machine, the lower end of the cutter shaft is fixedly provided with the connecting seat, the bottom of the lower end of the connecting seat is fixedly provided with the cutter seat, the sharp edge of the cutter is vertically arranged downwards, and the upper end of the cutter is fixedly connected to the cutter seat.

In the cloth cutting structure in the sewing machine, the sewing machine further comprises a machine shell and a needle bar guide plate fixedly arranged on the machine shell, a cutter guide plate is fixedly arranged on the needle bar guide plate through a fixing screw, a vertical strip-shaped hole is formed in the cutter guide plate, a limiting rod is fixedly arranged on one side of the connecting block, and the end part of the limiting rod is provided with a guide sliding block which is embedded in the strip-shaped hole in a sliding manner. Preferably, the guide sliding block is a bearing, so that sliding friction can be changed into rolling friction, friction force is reduced, and abrasion is reduced; furthermore, the driving motor is arranged on the motor mounting cover through a fastener, the motor mounting cover is fixedly connected with the motor mounting seat through the fastener, and the motor mounting seat is fixedly connected with a machine shell of the sewing machine.

In the cloth cutting structure of the sewing machine, the upper and lower spacing sleeves of the knife shaft are provided with the bushings, the knife shaft is in sliding connection with the bushings, and the bushings are fixed on the shell. Radial shaking is reduced, the up-and-down movement stability and reliability of the cutter shaft are guaranteed, and abrasion of the cutter shaft is reduced.

The utility model discloses having sharp sword on the cutter of cloth cutting structure in, can making up littleer button hole, also can realize the cutting process of big button hole through the cloth cutting sword to the cloth continuous cutting simultaneously, the length button hole need not the tool changing, and the cutter during operation does not break away from the cloth completely, does not need a lot of thorn materials, has avoided the button hole both sides deckle edge that sinks like this, also can not produce and connects the edge of a knife; in addition, when the cutter moves up and down to cut the button holes, the stroke displacement is short, the movement frequency can be improved, and the processing efficiency is improved.

Drawings

Fig. 1 is a schematic perspective view of the cutting structure.

Fig. 2 is a schematic perspective view of the second cutting structure.

Fig. 3 is a schematic perspective view of a cutting knife in the present cloth cutting structure.

In the figure, 1, a needle board assembly; 1a, needle plate holes; 1b, a yielding hole; 2. a drive motor; 3. a cutter shaft; 4. a drive block; 5. a drive link; 6. a cutter; 61. a sharp edge; 62. cutting a cloth blade; 7. an axial screw; 8. connecting blocks; 9. a connecting seat; 10. a cutter seat; 11. a needle bar guide plate; 12. a set screw; 13. a cutter guide plate; 13a, a strip-shaped hole; 14. a limiting rod; 15. a guide slider; 16. a bushing.

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.

As shown in fig. 1, 2 and 3, the sewing machine comprises a machine shell and a needle plate assembly 1, the cloth cutting structure comprises a driving motor 2 and a cutter shaft 3 capable of moving up and down, bushings 16 are sleeved on the upper part and the lower part of the cutter shaft 3 at intervals, the cutter shaft 3 is in sliding connection with the bushings 16, and the bushings 16 are fixed on the machine shell; the driving motor 2 is arranged on the motor mounting cover by a fastener, and the motor mounting cover is fixedly connected with the motor mounting seat by the fastener, and the motor mounting seat is fixedly connected with a machine shell of the sewing machine; the output shaft reciprocating rotation that has set firmly drive block 4 and driving motor 2 on driving motor 2's the output shaft can drive the swing of drive block 4, be connected through drive connecting rod 5 between drive block 4 and the arbor 3 and the swing of drive block 4 can drive arbor 3 and reciprocate, the lower extreme of arbor 3 has set firmly connecting seat 9, the lower extreme bottom of connecting seat 9 has set firmly cutter seat 10, cutter 6 has set firmly on cutter seat 10, the vertical setting down of sharp sword 61 of cutter 6, the upper end of cutter 6 links firmly on cutter seat 10, cutter 6 is located faller subassembly 1 directly over, the lower extreme of cutter 6 has sharp sword 61, one side of cutter 6 has cloth cutting sword 62, cloth cutting sword 62 is connected with sharp sword 61. Particularly, one end of the driving block 4 is fixedly connected with an output shaft of the driving motor 2, the other end of the driving block 4 radially and outwards extends along the output shaft of the driving motor 2, the end is hinged with one end of the driving connecting rod 5 through a shaft position screw 7, the other end of the driving connecting rod 5 is hinged with a connecting block 8, the connecting block 8 is sleeved on the cutter shaft 3, and the connecting block and the cutter shaft are fixedly connected. Further, the last pin plate hole 1a and the strip hole 1b that steps down that has of pin plate subassembly 1, pin plate hole 1a is located the one end of the hole 1b that steps down, and cutter 6 can insert in the hole 1b that steps down and when cutter 6 inserts in the hole 1b that steps down, and cloth cutting edge 62 is towards pin plate hole 1 a.

Under the condition that the sewing machine stops or sews normally, the cutter 6 and the cutter shaft 3 are both in a rising state, so that the operation of other parts of the sewing machine is prevented from being influenced; when the cutter needs to be lowered for keyhole opening, the driving motor 2 firstly rotates a large angle to drive the driving block 4 to swing a large amplitude, and further drives the cutter shaft 3 and the cutter 6 to descend by a large displacement, so that the cutter 6 pierces the sewing cloth by using the sharp blade 61, the cloth cutting blade 62 is aligned with the cloth to be cut, then the driving motor 2 slightly rotates at a positive angle and a negative angle, the driving motor 2 rotates to enable the cutter 6 to do vertical reciprocating motion after the blade edge descends into the needle plate assembly 1, the cloth cutting blade 62 of the cutter 6 cuts an opening in the cloth, the cutter 6 is not completely separated from the sewing cloth all the time, and after the keyhole is opened, the driving motor 2 rotates a large angle to take back the cutter 6. The cutting knife 6 of the cloth cutting structure is provided with the sharp blade 61, so that smaller buttonholes can be sewn, meanwhile, the cloth can be continuously cut through the cloth cutting blade 62 to realize the cutting processing of large buttonholes, the long buttonholes and the short buttonholes do not need to be changed, the cutting knife 6 does not completely separate the cloth when working, and the material does not need to be pierced for many times, so that sinking burrs at two sides of each buttonhole are avoided, and a connecting knife edge is not generated; in addition, when the cutter 6 moves up and down to cut the buttonhole, the stroke displacement is short, the movement frequency can be improved, and the processing efficiency is improved.

As shown in fig. 1 and 2, a needle bar guide plate 11 is fixedly arranged on the machine shell, a cutter guide plate 13 is fixedly arranged on the needle bar guide plate 11 through a fixing screw 12, a vertical strip-shaped hole 13a is formed in the cutter guide plate 13, a limiting rod 14 is fixedly arranged on one side of the connecting block 8, and a guide sliding block 15 which is embedded in the strip-shaped hole 13a in a sliding manner is arranged at the end part of the limiting rod 14. Preferably, the guide slider 15 is a bearing, so that sliding friction can be changed into rolling friction, friction force is reduced, and abrasion 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.

Although 1, a needle board assembly is used more herein; 1a, needle plate holes; 1b, a yielding hole; 2. a drive motor; 3. a cutter shaft; 4. a drive block; 5. a drive link; 6. a cutter; 61. a sharp edge; 62. cutting a cloth blade; 7. an axial screw; 8. connecting blocks; 9. a connecting seat; 10. a cutter seat; 11. a needle bar guide plate; 12. a set screw; 13. a cutter guide plate; 13a, a strip-shaped hole; 14. a limiting rod; 15. a guide slider; 16. bushings, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A cloth cutting structure in a sewing machine comprises a needle plate assembly (1), wherein the cloth cutting structure comprises a driving motor (2) and a cutter shaft (3) capable of moving up and down; the needle plate assembly is characterized in that a driving block (4) is fixedly arranged on an output shaft of the driving motor (2), the output shaft of the driving motor (2) can drive the driving block (4) to swing in a reciprocating mode, the driving block (4) is connected with the needle shaft (3) through a driving connecting rod (5), the driving block (4) can drive the needle shaft (3) to move up and down in a swinging mode, a cutter (6) is fixedly arranged at the lower end of the needle shaft (3), the cutter (6) is located right above the needle plate assembly (1), a sharp blade (61) is arranged at the lower end of the cutter (6), a cloth cutting blade (62) is arranged on one side of the cutter (6), and the cloth cutting blade (62) is connected with the sharp blade (61).

2. The cloth cutting structure in the sewing machine according to claim 1, characterized in that one end of the driving block (4) is fixedly connected with the output shaft of the driving motor (2), the other end of the driving block (4) extends radially outwards along the output shaft of the driving motor (2) and is hinged with one end of the driving connecting rod (5) through a shaft position screw (7), the other end of the driving connecting rod (5) is hinged with a connecting block (8), and the connecting block (8) is sleeved on the knife shaft (3) and is fixedly connected with the knife shaft.

3. The cloth cutting structure in a sewing machine according to claim 1 or 2, characterized in that the needle plate assembly (1) is provided with a needle plate hole (1a) and a strip-shaped abdicating hole (1b), the needle plate hole (1a) is located at one end of the abdicating hole (1b), the cutter (6) can be inserted into the abdicating hole (1b) and when the cutter (6) is inserted into the abdicating hole (1b), the cloth cutting edge (62) faces the needle plate hole (1 a).

4. The cloth cutting structure of the sewing machine according to claim 1 or 2, wherein a connecting seat (9) is fixedly arranged at the lower end of the cutter shaft (3), a cutter seat (10) is fixedly arranged at the bottom of the lower end of the connecting seat (9), a sharp edge (61) of the cutter (6) is vertically arranged downwards, and the upper end of the cutter (6) is fixedly connected to the cutter seat (10).

5. The cloth cutting structure of the sewing machine according to claim 2, wherein the sewing machine further comprises a machine shell and a needle bar guide plate (11) fixedly arranged on the machine shell, a cutter guide plate (13) is fixedly arranged on the needle bar guide plate (11) through a fixing screw (12), a vertical strip-shaped hole (13a) is formed in the cutter guide plate (13), a limiting rod (14) is fixedly arranged on one side of the connecting block (8), and a guide sliding block (15) which is slidably embedded in the strip-shaped hole (13a) is arranged at the end part of the limiting rod (14).

6. The cloth cutting structure of the sewing machine according to claim 5, characterized in that the knife shaft (3) is sleeved with a bushing (16) at an upper and a lower interval, the knife shaft (3) is connected with the bushing (16) in a sliding way, and the bushing (16) is fixed on the machine shell.