CN216074260U

CN216074260U - Three-in-one mechanism for lifting presser foot, cutting thread and adjusting thickness of sewing material for overedger

Info

Publication number: CN216074260U
Application number: CN202122709884.6U
Authority: CN
Inventors: 王伟伟; 林贤丛; 高占营
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Zhejiang Maqi Sewing Machine Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-03-18
Anticipated expiration: 2031-11-08

Abstract

The utility model discloses a three-in-one mechanism for lifting and pressing a foot, trimming a thread and adjusting the thickness of a sewing material for a overedger, which comprises a stepping motor, wherein an output shaft of the stepping motor is sequentially connected with a third output cam, a first output cam and a second output cam from inside to outside; the second output cam is suitable for pressing a ball end lever arranged at one end of the trimming lever below the second output cam, so that the trimming first connecting rod arranged at the other end of the trimming lever moves upwards to realize trimming; the third output cam drives the tooth adjusting lever to rotate, so that the tooth assembly arranged at the front end of the tooth assembly is lifted upwards or lowered downwards, and the action of adjusting the thickness of the sewing material is realized. The utility model can realize three actions by one motor, and can greatly improve the working efficiency of the overedger.

Description

Three-in-one mechanism for lifting presser foot, cutting thread and adjusting thickness of sewing material for overedger

Technical Field

The utility model relates to a three-in-one mechanism for lifting presser feet, trimming threads and adjusting thickness of sewing materials for a overedger.

Background

The existing sewing machine is split in a presser foot lifting, thread cutting and thread loosening device, is driven by electromagnets or cylinders independently, is high in cost, complex in structure and inconvenient to install, increases the production cost of enterprises, is high in use noise, and damages the physical and psychological health of operators. The height of the teeth needs to be adjusted according to sewing materials with different thicknesses, the adjusting process is complicated, the technical difficulty is high, and the requirement on workers is high.

Disclosure of Invention

The object of the present invention is to solve the drawbacks mentioned in the background art.

In order to achieve the purpose, the utility model provides a three-in-one mechanism for lifting a presser foot, trimming threads and adjusting the thickness of a sewing material for a overedger, which comprises a stepping motor, wherein an output shaft of the stepping motor is sequentially connected with a third output cam, a first output cam and a second output cam from inside to outside; the second output cam is suitable for pressing a ball end lever arranged at one end of the trimming lever below the second output cam to enable a trimming first connecting rod arranged at the other end of the trimming lever to move upwards, the trimming first connecting rod drives a trimming second connecting rod connected with the trimming first connecting rod to swing upwards, and the trimming second connecting rod drives a trimming cutter assembly connected with the trimming second connecting rod to realize trimming; the third output cam is provided with an annular guide groove, the tooth adjusting lever adjacent to the third output cam is provided with a sliding block matched with the annular guide groove, the third output cam drives the tooth adjusting lever to rotate through the matching of the sliding block and the annular guide groove, the tooth adjusting lever is suitable for driving a tooth adjusting first connecting rod connected with the tooth adjusting lever to move, the tooth adjusting first connecting rod is suitable for driving a tooth adjusting second connecting rod connected with the tooth adjusting lever to move along a guide shaft, the tooth adjusting second connecting rod is suitable for driving a tooth adjusting third connecting rod connected with the tooth adjusting lever to move, the tooth adjusting third connecting rod is suitable for driving a tooth adjusting fourth connecting rod connected with the tooth adjusting lever to move, the tooth adjusting fourth connecting rod drives a tooth adjusting eccentric shaft lever connected with the tooth adjusting lever to swing, the tooth adjusting eccentric shaft lever is suitable for driving a tooth adjusting eccentric shaft connected with the tooth adjusting lever to rotate, and the tooth adjusting eccentric shaft is suitable for swinging a tooth frame assembly connected with the tooth adjusting eccentric shaft during rotation, the tooth assembly arranged at the front end of the tooth assembly is lifted upwards or lowered downwards, so that the action of adjusting the thickness of the sewing material is realized.

Further, the stepping motor is fixed on the machine shell through a motor mounting bracket.

Further, the tooth adjusting lever is fixed on the motor mounting bracket through a wave-shaped gasket and a nut, so that the tooth height is kept relatively fixed.

Compared with the prior art, the utility model has the beneficial effects that:

three actions of lifting the presser foot, cutting the thread and adjusting the thickness of the sewing material can be realized through a motor and a double-layer cam, the structural design is exquisite, the operation is simple and convenient, the working efficiency of the sewing machine can be greatly improved, and the equipment cost can be effectively reduced.

Drawings

FIG. 1 is a schematic block diagram of one embodiment of the present invention;

FIG. 2 is a schematic view of the structure of a presser foot lifting mechanism in one embodiment of the present invention;

FIG. 3 is a schematic diagram of the construction of a thread trimming mechanism according to one embodiment of the present invention;

FIG. 4 is an exploded view of the mechanism for adjusting the thickness of the joint compound in one embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a mechanism for adjusting the thickness of the joint compound according to an embodiment of the present invention.

In the figure, a stepping motor 1, a first output cam 2, a limit retainer ring 3, a presser foot shaft 4, a presser foot arm 5, a presser foot assembly 6, a shaft sleeve 7, a presser foot lifting lever 8, a second output cam 9, a return spring 10, a trimming second connecting rod 11, a trimming knife assembly 12, a ball end lever 13, a trimming lever 14, a trimming first connecting rod 15, a motor mounting bracket 16, a tooth adjusting lever 17, a waveform gasket 18, a nut 19, a third output cam 20, a tooth adjusting second connecting rod 21, a tooth adjusting third connecting rod 22, a tooth frame assembly 23, a tooth assembly 24, a tooth adjusting first connecting rod 25, a guide shaft 26, a tooth adjusting fourth connecting rod 27, a tooth adjusting eccentric shaft lever 28, a tooth adjusting eccentric shaft 29 and a tooth adjusting eccentric shaft slider 30 are arranged.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. In the following description, directional terms such as "left", "right", "inner", "outer", and the like are used with respect to the orientation shown in the drawings, for convenience of description, and are not intended to limit the present invention.

As shown in fig. 1-5, an embodiment of the present invention relates to a three-in-one mechanism for presser foot lifting, thread cutting and seam material thickness adjustment of a overedger, which comprises a stepping motor 1, wherein an output shaft of the stepping motor 1 is sequentially connected with a third output cam 20, a first output cam 2 and a second output cam 9 from inside to outside, the first output cam 2 is suitable for pressing a shaft sleeve 7 arranged below the first output cam and on a presser foot lifting lever 8, the presser foot lifting lever 8 is suitable for driving a limit check ring 3 thereon to rotate downwards, the limit check ring 3 drives a presser foot shaft 4 connected therewith to rotate, the presser foot shaft 4 drives a presser foot arm 5 connected therewith to swing upwards, and the presser foot arm 5 drives a presser foot assembly 6 connected therewith to lift upwards, so as to realize the action of presser foot lifting; the second output cam 9 is suitable for pressing a ball end lever 13 arranged at one end of a trimming lever 14 below the second output cam to enable a trimming first connecting rod 15 arranged at the other end of the trimming lever 14 to move upwards, the trimming first connecting rod 15 drives a trimming second connecting rod 11 connected with the trimming first connecting rod to swing upwards, and the trimming second connecting rod 11 drives a trimming cutter assembly 12 connected with the trimming second connecting rod to realize trimming; the third output cam 20 is provided with an annular guide groove, the tooth adjusting lever 17 adjacent to the third output cam 20 is provided with a sliding block matched with the annular guide groove, the sliding block penetrates through the annular guide groove, the third output cam 20 drives the tooth adjusting lever 17 to rotate through the matching of the sliding block and the annular guide groove, the tooth adjusting lever 17 is suitable for driving a tooth adjusting first connecting rod 25 connected with the tooth adjusting lever 17 to move, the tooth adjusting first connecting rod 25 is suitable for driving a tooth adjusting second connecting rod 21 connected with the tooth adjusting first connecting rod to move along a guide shaft 26, the tooth adjusting second connecting rod 21 is suitable for driving a tooth adjusting third connecting rod 22 connected with the tooth adjusting first connecting rod to move, the tooth adjusting third connecting rod 22 is suitable for driving a tooth adjusting fourth connecting rod 27 connected with the tooth adjusting first connecting rod to move, the tooth adjusting fourth connecting rod 27 drives a tooth adjusting eccentric shaft lever 28 connected with the tooth adjusting first connecting rod to swing, and the tooth adjusting eccentric shaft lever 28 is suitable for driving a tooth adjusting eccentric shaft 29 connected with the tooth adjusting first connecting rod to rotate, the tooth adjusting eccentric shaft 29 is suitable for enabling the tooth frame assembly 23 connected with the tooth adjusting eccentric shaft to swing in the rotating process, so that the tooth assembly 24 arranged at the front end of the tooth frame assembly 23 is lifted upwards or lowered downwards, and the action of adjusting the thickness of the sewing material is realized.

Specifically, the stepping motor 1 rotates anticlockwise to drive the first output cam 2 to rotate anticlockwise, the shaft sleeve 7 arranged on the presser foot lifting lever 8 is pressed downwards to drive the presser foot lifting lever 8 to swing downwards, the presser foot lifting lever 8 drives the limiting check ring 3 to rotate downwards, the limiting check ring 3 drives the presser foot pressing shaft 4 to rotate, the presser foot pressing shaft 4 drives the presser foot pressing arm 5 to swing upwards, the presser foot pressing arm 5 drives the presser foot component 6 to lift upwards to realize the function of lifting the presser foot, the stepping motor 1 resets to drive the first output cam 2 to reset, and the original mechanism of lifting the presser foot drives the presser foot component 6 and the presser foot lifting lever 8 to reset; the stepping motor 1 rotates clockwise to drive the second output cam 9 to rotate clockwise, the ball end lever 13 arranged on the trimming lever 14 is pressed downwards to drive the trimming first connecting rod 15 arranged at the other end of the trimming lever 14 to move upwards, the trimming first connecting rod 15 drives the trimming second connecting rod 11 to swing upwards, the trimming second connecting rod 11 drives the trimming cutter assembly 12 to realize trimming, the stepping motor 1 resets to drive the second output cam 9 to reset, the reset spring 10 drives the trimming lever 14 to reset, the trimming lever 14 drives the trimming first connecting rod 15 to reset, the trimming first connecting rod 15 drives the trimming second connecting rod 11 to reset, and the trimming second connecting rod 11 drives the trimming cutter assembly to reset; when the tooth height of the thick material needs to be adjusted to be high, the stepping motor 1 is driven to rotate clockwise, the stepping motor 1 drives the third output cam 20 to rotate clockwise, an annular guide groove is designed on the third output cam 20, a corresponding tooth adjusting lever 17 is designed with a sliding block characteristic matched with the annular guide groove, in the clockwise rotation process of the third output cam 20, the right end face of the annular guide groove of the third output cam 20 drives the tooth adjusting lever 17 to rotate clockwise, the tooth adjusting lever 17 drives the tooth adjusting first connecting rod 25 to move downwards, the tooth adjusting first connecting rod 25 drives the tooth adjusting second connecting rod 21 to move downwards along the guide shaft 26, the tooth adjusting second connecting rod 21 drives the tooth adjusting third connecting rod 22 to move downwards, the tooth adjusting third connecting rod 22 drives the tooth adjusting fourth connecting rod 27 to move downwards, the tooth adjusting fourth connecting rod 27 drives the tooth adjusting eccentric shaft lever 28 to swing downwards, the tooth adjusting eccentric shaft lever 28 drives the tooth adjusting eccentric shaft 29 to rotate downwards, the process that the tooth adjusting eccentric shaft 29 rotates downwards enables the rear end of the tooth frame component 23 to descend and the front end of the tooth frame component 23 to ascend, namely the tooth component 24 installed at the front end of the tooth frame component 23 ascends, and after the required tooth height is reached, the stepping motor 1 resets to drive the third output cam 20 to reset, and because the left end face of the guide groove of the third output cam 20 is not contacted with the slider characteristic of the tooth adjusting lever 17 in the resetting process of the stepping motor, the tooth adjusting lever 17 and the motor installing support 16 are kept relatively fixed, and the tooth height is locked; when the tooth height of the thin material needs to be adjusted down, the stepping motor 1 is driven to rotate anticlockwise, the stepping motor 1 drives the third output cam 20 to rotate anticlockwise, in the process of rotating the third output cam 20 anticlockwise, the left end surface of the annular guide groove of the third output cam 20 drives the tooth adjusting lever 17 to rotate anticlockwise, the tooth adjusting lever 17 drives the tooth adjusting first connecting rod 25 to move upwards, the tooth adjusting first connecting rod 25 drives the tooth adjusting second connecting rod 21 to move upwards along the guide shaft 26, the tooth adjusting second connecting rod 21 drives the tooth adjusting third connecting rod 22 to move upwards, the tooth adjusting third connecting rod 22 drives the tooth adjusting fourth connecting rod 27 to move upwards, the tooth adjusting fourth connecting rod 27 drives the tooth adjusting eccentric shaft lever 28 to swing upwards, the tooth adjusting eccentric shaft lever 28 drives the tooth adjusting eccentric shaft 29 to rotate upwards, the tooth adjusting eccentric shaft 29 rotates upwards, so that the rear end of the tooth frame assembly 23 is lifted, the front end of the tooth assembly 24 installed at the front end of the tooth frame assembly 23 is lowered downwards, after the required tooth height is reached, the stepping motor 1 resets to drive the third output cam 20 to reset, and because the right end face of the guide groove of the third output cam 20 is not contacted with the slider characteristic of the tooth adjusting lever 17 in the resetting process of the stepping motor 1, the tooth adjusting lever 17 and the motor mounting bracket 16 are kept relatively fixed to lock the tooth height. The thread trimming does not occur when the stepping motor 1 drives the presser foot lifting mechanism to act, the presser foot lifting mechanism does not occur when the stepping motor 1 drives the thread trimming mechanism to act, and the two mechanisms do not interfere with each other. Meanwhile, when the stepping motor 1 drives the presser foot lifting and trimming to act, the sliding block of the tooth adjusting lever 17 is not contacted with the end surface of the annular guide groove of the third output cam 20 all the time, namely, when the presser foot lifting and trimming act, the sewing material thickness adjusting mechanism does not act. Along with the rotation of the stepping motor 1, the height of the pressure foot lifting mechanism is firstly raised, then kept and then lowered, so that when the height of the teeth is reduced, the pressure foot lifting mechanism can act, and is firstly raised, then kept and then lowered; meanwhile, with the rotation of the stepping motor 1, the thread trimmer is firstly occluded, then kept and then reset, so that when the height of the tooth is increased, the thread trimmer mechanism can act, and the thread trimmer is firstly occluded, then kept and then reset.

In one embodiment, the stepping motor 1 is fixed on the machine shell through a motor mounting bracket 16, the tooth adjusting lever 17 is fixed on the motor mounting bracket 16 through a wave-shaped gasket 18 and a nut 19, so that the height of teeth is kept relatively fixed, when the stepping motor 1 drives a third output cam 20 to rotate and provide sufficient external force, the tooth adjusting lever 17 can be driven to rotate, the height of the teeth is adjusted, and the thickness of the sewing material is adjusted.

The control software related to the utility model adopts the prior art.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A three-in-one mechanism for lifting a presser foot, trimming threads and adjusting the thickness of a sewing material for a overedger is characterized by comprising a stepping motor (1), wherein an output shaft of the stepping motor (1) is sequentially connected with a third output cam (20), a first output cam (2) and a second output cam (9) from inside to outside, the first output cam (2) is suitable for pressing a shaft sleeve (7) which is arranged below the first output cam and is arranged on a presser foot lifting lever (8), the presser foot lifting lever (8) is suitable for driving a limiting check ring (3) on the presser foot lifting lever to rotate downwards, the limiting check ring (3) drives a presser foot shaft (4) connected with the presser foot lifting lever to rotate, the presser foot shaft (4) drives a presser foot arm (5) connected with the presser foot shaft to swing upwards, and the presser foot arm (5) drives a presser foot assembly (6) connected with the presser foot arm to lift upwards, so as to realize the action of lifting the presser foot; the second output cam (9) is suitable for pressing a ball end lever (13) which is arranged below the second output cam and is arranged at one end of a trimming lever (14) to enable a trimming first connecting rod (15) which is arranged at the other end of the trimming lever (14) to move upwards, the trimming first connecting rod (15) drives a trimming second connecting rod (11) which is connected with the trimming first connecting rod to swing upwards, and the trimming second connecting rod (11) drives a trimming cutter assembly (12) which is connected with the trimming second connecting rod to realize trimming; the third output cam (20) is provided with an annular guide groove, the tooth adjusting lever (17) adjacent to the third output cam is provided with a sliding block matched with the annular guide groove, the tooth adjusting lever (17) is driven to rotate by the third output cam (20) through the matching of the sliding block and the annular guide groove, the tooth adjusting lever (17) is suitable for driving a tooth adjusting first connecting rod (25) connected with the tooth adjusting lever to move, the tooth adjusting first connecting rod (25) is suitable for driving a tooth adjusting second connecting rod (21) connected with the tooth adjusting first connecting rod to move along a guide shaft (26), the tooth adjusting second connecting rod (21) is suitable for driving a tooth adjusting third connecting rod (22) connected with the tooth adjusting first connecting rod to move, the tooth adjusting third connecting rod (22) is suitable for driving a tooth adjusting fourth connecting rod (27) connected with the tooth adjusting first connecting rod to move, the tooth adjusting fourth connecting rod (27) drives a tooth adjusting eccentric shaft lever (28) connected with the tooth adjusting eccentric shaft to swing, and the tooth adjusting eccentric shaft lever (28) is suitable for driving a tooth adjusting eccentric shaft (29) connected with the tooth adjusting eccentric shaft to rotate, the tooth adjusting eccentric shaft (29) is suitable for enabling the tooth frame component (23) connected with the tooth adjusting eccentric shaft to swing in the rotating process, so that the tooth component (24) installed at the front end of the tooth frame component (23) is lifted upwards or lowered downwards, and the action of adjusting the thickness of the sewing material is realized.

2. The three-in-one mechanism for lifting and pressing the foot, cutting the thread and adjusting the thickness of the sewing material for the overlock sewing machine as claimed in claim 1, wherein the stepping motor (1) is fixed on the machine shell through a motor mounting bracket (16).

3. The three-in-one mechanism of presser foot lifting, thread cutting and seam material thickness adjustment for overlock machine as claimed in claim 2, wherein said tooth adjusting lever (17) is fixed on said motor mounting bracket (16) by a wave shaped washer (18) and a nut (19) so that tooth height is kept relatively fixed.