CN220767372U - Thread cutting moving knife driving structure of sewing machine - Google Patents

Abstract

The utility model provides a thread cutting moving knife driving structure of a sewing machine, and belongs to the technical field of sewing machines. The thread cutting movable knife solves the technical problems that an existing thread cutting movable knife of a sewing machine is poor in accuracy, high in precision requirement on parts and the like. The thread cutting moving knife driving structure of the sewing machine comprises a guide rail fixedly arranged on a rotating shuttle frame, a sliding block sleeved on the guide rail in a sliding way and a swinging rod capable of swinging, wherein a strip-shaped groove is formed in the sliding block, the length direction of the strip-shaped groove is arranged along the width direction of the guide rail, or an included angle is formed between the length direction of the strip-shaped groove and the width direction of the guide rail; the outer end of the swinging rod is provided with a bolt movably inserted in the strip-shaped groove, and the thread cutting movable knife is fixedly connected with the sliding block. The shearing line moving knife has the advantages of few structural parts, simple structure, convenient assembly, low cost, stability and reliability.

Description

Thread cutting moving knife driving structure of sewing machine

Technical Field

The utility model belongs to the technical field of sewing machines, and relates to a thread cutting moving knife driving structure of a sewing machine.

Background

A sewing machine is a machine that interweaves or sews one or more layers of stitching material by forming one or more stitches on the stitching material with one or more stitching threads. Currently, sewing machines are used in a large amount in the clothing manufacturing industry, and particularly, large-sized sewing machines for factories are more widely used in manufacturing enterprises for mass-producing clothing. An automatic thread cutting mechanism is usually arranged in the existing sewing machine so as to improve the working efficiency. The conventional straight-blade wire cutting mechanism is complex, has high precision requirements on parts, inevitably causes the conditions of wire cutting and clamping, unsmooth and the like due to the precision problem of the parts, and has relatively high cost.

The utility model discloses a thread cutting device of sewing machine, including stationary knife rest, movable knife and stationary knife, the movable knife is installed on the rotating shuttle table of sewing machine, the stationary knife rest includes long banding connecting portion and is used for fixed stationary knife's cubic installation department, installation department is relative connecting portion buckle setting, bar hole one has been seted up along connecting portion length direction on the connecting portion, connecting portion is leaned on the lateral wall of rotating shuttle table and can pass bar hole one through the fastener and fix on rotating shuttle table, the stationary knife is fixed on the installation department and is located movable knife top, movable knife below still is equipped with end clamp line assembly, movable knife can realize the thread cutting with stationary knife cooperation.

In the thread cutting device disclosed in the above patent document, the movable knife is arranged on the rotating shuttle table through the movable knife driving slide block and the movable knife guide frame, the movable knife guide frame is provided with the guide chute, the movable knife driving slide block is arranged in the guide chute in a sliding manner, foreign matters easily fall into the guide chute to cause blocking, in addition, one end of the movable knife is fixed on the movable knife driving slide block, the other end of the movable knife is suspended in the air, and the cutting edge section is easy to deform for a long time, so that the thread cutting is influenced.

Disclosure of Invention

The utility model aims at the problems existing in the prior art, and provides a thread cutting moving knife driving structure of a sewing machine, which aims at solving the technical problems that: how to improve the accurate reliability of the line cutting moving knife, and reduce the precision requirement and cost for parts.

The utility model provides a sewing machine cut line and move sword drive structure adopts following technical scheme:

the utility model provides a sewing machine cut line and move sword drive structure, includes the guide rail that sets firmly on the rotating shuttle frame, the slider that the slip cover was established on the guide rail and can the wobbling swinging arms, set up the bar groove on the slider, the length direction in bar groove sets up along the width direction of guide rail, perhaps the length direction in bar groove forms the contained angle with the width direction of guide rail; the outer end of the swinging rod is provided with a bolt movably inserted into the strip-shaped groove, and the thread cutting movable knife is fixedly connected with the sliding block.

The principle is as follows: the inner end of the swinging rod is connected with a driving shaft, the driving shaft can be connected with a main shaft of the sewing machine through a transmission structure, driving parts such as a motor, a rotary cylinder and the like can also be independently arranged, the driving shaft drives the swinging rod to swing, the outer end of the swinging rod is in an arc-shaped movement track, and the sliding block is driven to act through the movement of a bolt in a strip-shaped groove. The driving structure in the sewing machine thread cutting structure is optimized, the structure is simple, parts are few, the assembly is convenient, the precision requirement on parts is reduced, and the production cost is reduced.

In addition, the slider cover is established on the guide rail in this application, for the spout structure, can reduce the accumulation of foreign matter, reduces the emergence of cutting line and moving the dead phenomenon of sword card.

In the thread cutting moving knife driving structure of the sewing machine, the movable knife rest is fixedly connected to the sliding block, one end of the thread cutting moving knife is a connecting end, the other end of the thread cutting moving knife is a cutting edge end, the length direction of the thread cutting moving knife is consistent with the length direction of the guide rail, the connecting end of the thread cutting moving knife is connected to the movable knife rest through at least two fastening screws, and the cutting edge end of the thread cutting moving knife is provided with a thread cutting edge.

In the thread cutting moving knife driving structure of the sewing machine, the moving knife rest comprises a first horizontal plate, a vertical plate and a second horizontal plate, and the first horizontal plate is connected to the sliding block through at least two fastening screws; the lower end of the vertical plate is fixedly connected with one side of the first horizontal plate; the upper end of the vertical plate is fixedly connected with one side of the second horizontal plate, the connecting end of the wire shearing moving knife is provided with a connecting plate, and the connecting plate is attached to the upper side of the second horizontal plate and is fixedly connected through the fastening screw. The whole structure is simple, the parts are few, and the assembly is simple and reliable.

In the thread cutting moving knife driving structure of the sewing machine, the rotating shuttle frame is fixedly provided with the moving knife bracket, the moving knife bracket is positioned on one side of the guide rail, and the middle part of the thread cutting moving knife is dragged against the upper end of the moving knife bracket. The movable knife bracket plays a certain role of supporting the movable knife, so that the problem that the movable knife for shearing wires deforms after being used for a long time and collides with the fixed knife or has an oversized gap with the fixed knife can be effectively avoided.

In the thread cutting moving knife driving structure of the sewing machine, the guide rail is an M-shaped guide rail, and the sliding block is an M-shaped sliding block. Therefore, the sliding fit of the guide rail and the sliding block is more accurate and reliable, the shaking of the movable knife is reduced, and the stability and reliability of the wire cutting are improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the driving structure in the sewing machine thread cutting structure is optimized, the structure is simple, parts are few, the assembly is convenient, the precision requirement on parts is reduced, and the production cost is reduced.

2. The slider cover is established on the guide rail in this application, for the spout structure, can reduce the piling up of foreign matter, reduces the emergence of cutting line and moving the dead phenomenon of sword card.

Drawings

Fig. 1 is a schematic perspective view of a driving structure in the present application.

Fig. 2 is a schematic diagram of an exploded structure of the driving structure in the present application.

In the figure, 1, a rotating shuttle frame; 2. a guide rail; 3. a slide block; 31. a bar-shaped groove; 4. a swinging rod; 41. a plug pin; 5. cutting a line to move a knife; 51. a connection end; 52. a blade end; 53. a connecting plate; 54. a cutting edge; 6. a movable tool rest; 61. a first horizontal plate; 62. a vertical plate; 63. a second horizontal plate; 7. a movable knife bracket.

Detailed Description

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

As shown in fig. 1 and 2, the sewing machine in this embodiment includes a rotating shuttle frame 1 and a thread cutting movable blade 5. The driving structure in this application includes guide rail 2 and slider 3, and guide rail 2 is M type guide rail, and slider 3 is M type slider. The guide rail 2 is fixedly arranged on the rotating shuttle frame 1 through a plurality of screws, the screws are arranged at intervals along the length direction of the guide rail 2, and the sliding block 3 is sleeved on the guide rail 2 in a sliding way. The sliding block 3 is fixedly connected with a movable knife rest 6, one end of the wire cutting movable knife 5 is a connecting end 51, the other end is a cutting edge end 52, the length direction of the wire cutting movable knife 5 is consistent with the length direction of the guide rail 2, and the cutting edge end 52 of the wire cutting movable knife 5 is provided with a wire cutting edge 54.

As shown in fig. 1 and 2, a swinging rod 4 capable of swinging is arranged on the rotating shuttle frame 1, specifically, the inner end of the swinging rod 4 is connected with a driving shaft, the driving shaft can be connected with a main shaft of a sewing machine through a transmission structure, driving parts such as a motor, a rotary cylinder and the like can also be independently arranged, the driving parts drive the swinging rod 4 to swing through the driving shaft, a bar-shaped groove 31 is arranged on the sliding block 3, the length direction of the bar-shaped groove 31 is arranged along the width direction of the guide rail 2, or an included angle is formed between the length direction of the bar-shaped groove 31 and the width direction of the guide rail 2; the outer end of the swinging rod 4 is provided with a bolt 41 movably inserted in the strip-shaped groove 31, and a bearing or a shaft sleeve is sleeved on the bolt 41.

As shown in fig. 1 and 2, the connecting end 51 of the wire cutting movable blade 5 is connected to the movable blade holder 6 by at least two fastening screws. Specifically, the movable blade carrier 6 includes a first horizontal plate 61, a vertical plate 62, and a second horizontal plate 63, the first horizontal plate 61 being connected to the slider 3 by at least two fastening screws; the lower end of the vertical plate 62 is fixedly connected with one side of the first horizontal plate 61; the upper end of the vertical plate 62 is fixedly connected with one side of the second horizontal plate 63, the connecting end 51 of the wire cutting knife 5 is provided with a connecting plate 53, and the connecting plate 53 is abutted against the upper side of the second horizontal plate 63 and fixedly connected through a fastening screw.

As shown in fig. 1 and 2, a movable cutter bracket 7 is fixed on the rotating shuttle frame 1, the movable cutter bracket 7 is positioned on one side of the guide rail 2, and the middle part of the thread cutting movable cutter 5 is towed against the upper end of the movable cutter bracket 7. The movable knife bracket 7 plays a certain role of supporting the movable knife, so that the problem that the movable knife 5 for shearing is deformed after being used for a long time and collides with the fixed knife or has an oversized gap with the fixed knife can be effectively avoided.

The principle of the embodiment is as follows: the outer end of the swinging rod 4 presents a section of arc-shaped movement track, and the sliding block 3 is driven to act by moving in the strip-shaped groove 31 through the bolt 41, and the degree of freedom of the movement path of the sliding block 3 is limited by the guide rail 2, so that the guide rail 2 finally determines the thread cutting path of the sliding block 3 and the thread cutting movable knife 5. The driving structure in the sewing machine thread cutting structure is optimized, the structure is simple, parts are few, the assembly is convenient, the precision requirement on parts is reduced, and the production cost is reduced. In this application slider 3 cover is established on guide rail 2, for the spout structure, can reduce the piling up of foreign matter, reduces the emergence of cutting line and moving the dead phenomenon of sword 5 card.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. 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 utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (5)

1. The utility model provides a thread cutting movable knife driving structure of sewing machine, includes guide rail (2) that sets firmly on rotating shuttle frame (1), slider (3) and the wobbling swinging rod (4) that the slip cover was established on guide rail (2), characterized in that, set up bar groove (31) on slider (3), the length direction of bar groove (31) is along the width direction setting of guide rail (2), perhaps the length direction of bar groove (31) with the width direction of guide rail (2) forms the contained angle; the outer end of the swinging rod (4) is provided with a bolt (41) movably inserted into the strip-shaped groove (31), and the thread cutting movable knife (5) is fixedly connected with the sliding block (3).

2. The thread cutting moving knife driving structure of the sewing machine according to claim 1, wherein the slider (3) is fixedly connected with a moving knife rest (6), one end of the thread cutting moving knife (5) is a connecting end (51), the other end is a cutting edge end (52), the length direction of the thread cutting moving knife (5) is consistent with the length direction of the guide rail (2), the connecting end (51) of the thread cutting moving knife (5) is connected to the moving knife rest (6) through at least two fastening screws, and the cutting edge end (52) of the thread cutting moving knife (5) is provided with a thread cutting edge (54).

3. A driving structure of a thread cutting knife of a sewing machine according to claim 2, characterized in that the moving knife rest (6) comprises a first horizontal plate (61), a vertical plate (62) and a second horizontal plate (63), the first horizontal plate (61) being connected to the slider (3) by at least two fastening screws; the lower end of the vertical plate (62) is fixedly connected with one side of the first horizontal plate (61); the upper end of the vertical plate (62) is fixedly connected with one side of the second horizontal plate (63), the connecting end (51) of the wire shearing moving knife (5) is provided with a connecting plate (53), and the connecting plate (53) is attached to the upper side of the second horizontal plate (63) and fixedly connected through the fastening screw.

4. A thread cutting moving knife driving structure of a sewing machine according to claim 1, 2 or 3, characterized in that a moving knife bracket (7) is fixed on the rotating shuttle frame (1), the moving knife bracket (7) is positioned at one side of the guide rail (2), and the middle part of the thread cutting moving knife (5) is dragged against the upper end of the moving knife bracket (7).

5. A driving structure of a thread cutting knife of a sewing machine according to claim 1, 2 or 3, wherein the guide rail (2) is an M-shaped guide rail, and the slider (3) is an M-shaped slider.