CN216786452U

CN216786452U - Presser foot lifting and thread trimming driving device of four-needle six-thread crank arm sewing machine

Info

Publication number: CN216786452U
Application number: CN202122957883.3U
Authority: CN
Inventors: 梁健军; 黄为
Original assignee: Taizhou Hongsheng Electronic Co ltd
Current assignee: Taizhou Hongsheng Electronic Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-06-21
Anticipated expiration: 2031-11-26

Abstract

The utility model relates to a presser foot lifting and trimming driving device of a four-needle six-thread crank arm sewing machine, which is characterized in that an arc driving part and a driving flange part are arranged at the outer edge part of a cam, and a stepping motor respectively drives a presser foot lifting transmission mechanism and a trimming transmission mechanism through the cam to complete the presser foot lifting and trimming work.

Description

Presser foot lifting and thread trimming driving device of four-needle six-thread crank arm sewing machine

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a presser foot lifting and thread trimming driving device of a four-needle six-thread crank arm sewing machine.

Background

The four-needle six-thread sewing machine is a curved back seam splicing machine, mainly used for splicing and splicing seam pieces. The machine is an internationally recognized ISO607 stitch, has strong dynamic property, consists of four upper threads, a bottom thread and a halshun thread, and has unique high-elasticity, flat and high-strength edge joint effect.

The existing four-needle six-thread crank arm sewing machine comprises a cylinder body, a machine arm and a machine head, wherein a presser foot mechanism and a thread trimming mechanism assembly are arranged on the machine head, the thread trimming mechanism and a driving device of the presser foot mechanism of the existing crank arm sewing machine are separated, the thread trimming mechanism is pushed to trim threads and reset by an electromagnet or an air cylinder, the presser foot is lifted by another electromagnet or air cylinder in a similar way to drive the presser foot, and the original driving source has the defects of complex installation and processing difficulty, high noise, instability and the like. At present, stepping motors are adopted in the market as driving sources, open-loop control is adopted, and the defects of step loss, low precision, high power consumption, large vibration and the like exist.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide a presser foot lifting and trimming driving device of a four-needle six-thread crank arm sewing machine.

The technical scheme is adopted for realizing the purpose:

the utility model provides a four six lines of needles crank arm sewing machine lift presser foot and trimming drive arrangement, crank arm sewing machine includes barrel, horn and aircraft nose, and the aircraft nose is located the top of barrel, and the aircraft nose links firmly the tip with the horn, and the horn other end links firmly its characterized in that with the one end of barrel: the device comprises a machine head, and is characterized in that a presser foot mechanism, a thread trimming mechanism assembly and a driving mechanism are arranged on the machine head, the driving mechanism comprises a driving motor and a motor fixing seat, the motor fixing seat is fixedly connected to the outer side of the machine head, the driving motor is fixed on the motor fixing seat, a driving cam is sleeved on an output shaft of the driving motor, an arc driving part and a driving flange part are arranged at the outer edge part of the cam, the distance from the arc driving part to the axis of the cam is an Archimedes spiral line which gradually increases, the arc driving part is connected with the input end of the presser foot lifting transmission mechanism, the driving flange part is connected with the input end of the thread trimming transmission mechanism, the output end of the thread trimming transmission mechanism is connected with the thread trimming mechanism assembly, and the output end of the presser foot transmission mechanism is connected with the presser foot mechanism.

The wire cutting transmission mechanism and the presser foot lifting transmission mechanism are arranged in the motor fixing seat, the wire cutting transmission mechanism comprises a fixing plate, the fixing plate is fixedly connected with the motor fixing seat, an upper guide sleeve and a lower guide sleeve are arranged on the fixing plate, a guide shaft penetrates through the two guide sleeves through a shaft sleeve, the lower end of the guide shaft is connected with the wire cutting mechanism assembly, a driving sleeve and a reset spring are sleeved in the middle of the guide shaft, the upper end of the reset spring is abutted to the bottom of the driving sleeve, the lower end of the reset spring is abutted to the top of the lower guide sleeve, the reset spring generates upward acting force on the guide shaft, and the upper end of the guide shaft is connected with a driving flange portion.

Lift presser foot drive mechanism include the drive pivot, the pin joint of drive pivot is on the motor fixing base, the input of drive pivot has linked firmly the actuating arm, the actuating arm free end is provided with first gyro wheel, first gyro wheel supports and leans on in arc drive division, the output of drive pivot has linked firmly the lifting arm, the output of lifting arm is connected with the connecting seat of presser foot mechanism.

The middle part of the driving rotating shaft is fixedly connected with a thread loosening driving arm, the thread loosening driving arm is movably connected with a thread loosening rocker arm through a thread loosening connecting rod, and the thread loosening rocker arm is connected with a thread loosening mechanism of the crank arm sewing machine.

The driving flange part is provided with a shaft hole which is axially parallel to the output shaft, a screw rod penetrates through the shaft hole and is fixedly connected to the driving flange part, a second idler wheel which is coaxial with the screw rod is arranged on the screw rod, and the upper end of the guide shaft is abutted against the second idler wheel.

The fixed plate is also provided with a guide rail, the direction of the guide rail is parallel to the guide shaft, one side of the driving sleeve is provided with a guide block, and the guide block is accommodated in the guide rail.

The controller of the crank arm sewing machine controls the driving motor to work, when the driving motor rotates forwards, the second roller of the driving flange part drives the guide shaft to move downwards, and then the thread trimming mechanism component is driven to move downwards to complete thread trimming; when the driving motor rotates reversely, the first idler wheel abuts against the arc-shaped driving part, the cam rotates to drive the driving rotating shaft to rotate, the driving rotating shaft rotates to lift the presser foot mechanism through the lifting arm, and meanwhile, the thread loosening work is completed through the thread loosening driving arm, the thread connecting rod and the thread loosening rocker arm; the utility model ensures that the thread trimming and the presser foot lifting are completed by one driving motor without mutual interference, and has the characteristics of reasonable structure, stable work and good reliability.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural diagram (II) of the present invention;

FIG. 3 is a schematic structural view of a portion of the components of the present invention;

FIG. 4 is a schematic view (I) of the matching structure of the driving mechanism and the components of the presser foot mechanism and the thread trimming mechanism;

FIG. 5 is a schematic view (II) of the matching structure of the driving mechanism, the presser foot mechanism and the thread trimming mechanism assembly of the present invention;

FIG. 6 is a schematic view (III) of the fitting structure of the driving mechanism, the presser foot mechanism and the thread trimming mechanism assembly of the present invention;

FIG. 7 is a schematic view (IV) of the matching structure of the driving mechanism and the components of the presser foot mechanism and the thread trimming mechanism;

fig. 8 is a schematic structural view of the driving motor and the cam according to the present invention.

Detailed Description

As shown in fig. 1-8, a presser foot lifting and thread trimming driving device of a four-needle six-thread crank arm sewing machine, the crank arm sewing machine comprises a cylinder body 1, a machine arm 2 and a machine head 3, the machine head 3 is positioned above the cylinder body 1, the machine head 3 is fixedly connected with the end part of the machine arm 2, the other end of the machine arm 2 is fixedly connected with one end of the cylinder body 1, and the four-needle six-thread crank arm sewing machine is characterized in that: the machine head 3 is provided with a presser foot mechanism 4, a thread trimming mechanism assembly 5 and a driving mechanism, the driving mechanism comprises a driving motor 6 and a motor fixing seat 7, the motor fixing seat 7 is fixedly connected to the outer side of the machine head 3, the driving motor 6 is fixed on the motor fixing seat 7, an output shaft of the driving motor 6 is sleeved with a driving cam 8, an arc driving portion 81 and a driving flange portion 82 are arranged on the outer edge portion of the cam 8, the distance from the arc driving portion 81 to the axis of the cam 8 is an Archimedes spiral which gradually increases, the arc driving portion 81 is connected with the input end of the presser foot lifting transmission mechanism, the driving flange portion 82 is connected with the input end of the thread trimming transmission mechanism, the output end of the thread trimming transmission mechanism is connected with the thread trimming mechanism assembly 5, and the output end of the presser foot transmission mechanism is connected with the presser foot mechanism 4.

The trimming transmission mechanism and the presser foot lifting transmission mechanism are arranged in the motor fixing seat 7, the trimming transmission mechanism comprises a fixing plate 71, the fixing plate 71 is fixedly connected with the motor fixing seat 7, an upper guide sleeve and a lower guide sleeve 72 are arranged on the fixing plate 71, a guide shaft 73 penetrates through the two guide sleeves 72 through a shaft sleeve, the lower end of the guide shaft 73 is connected with the trimming mechanism assembly 5, a driving sleeve 74 and a reset spring 75 are sleeved in the middle of the guide shaft 73, the upper end of the reset spring 75 abuts against the bottom of the driving sleeve 74, the lower end of the reset spring 75 abuts against the top of the lower guide sleeve, the reset spring 75 generates upward acting force on the guide shaft 73, and the upper end of the guide shaft 73 is connected with a driving flange part 82; a guide rail 711 is further arranged on the fixed plate 71, the direction of the guide rail 711 is parallel to the guide shaft 73, a guide block 741 is arranged on one side of the driving sleeve 74, and the guide block 741 is accommodated in the guide rail 711; the guide rail and the driving sleeve are matched to improve the stability of the guide shaft when the guide shaft moves up and down.

The presser foot lifting transmission mechanism comprises a driving rotating shaft 76, the driving rotating shaft 76 is pivoted on the motor fixing seat 7, the input end of the driving rotating shaft 76 is fixedly connected with a driving arm 77, a free end of the driving arm 77 is provided with a first roller 771, the first roller 771 abuts against the arc-shaped driving part 81, the output end of the driving rotating shaft 76 is fixedly connected with a lifting arm 78, and the output end of the lifting arm 78 is connected with the connecting seat 41 of the presser foot mechanism 4.

The middle part of the driving rotating shaft 76 is fixedly connected with a thread loosening driving arm 79, the thread loosening driving arm 79 is movably connected with a thread loosening rocker arm 92 through a thread loosening connecting rod 91, and the thread loosening rocker arm 92 is connected with a thread loosening mechanism of the crank arm sewing machine.

The driving flange 82 is provided with a shaft hole parallel to the axial direction of the output shaft, a screw 83 penetrates through the shaft hole and is fixedly connected to the driving flange 82, a second roller 84 coaxial with the screw is arranged on the screw 83, and the second roller 84 abuts against the top of the guide shaft 73.

The controller of the crank arm sewing machine controls the driving motor to work, when the driving motor rotates forwards, the second idler wheel of the driving flange part drives the guide shaft to move downwards, the guide shaft further drives the thread trimming mechanism component to move downwards to complete thread trimming work, and when the driving motor rotates backwards to drive the driving flange part to reset, the guide shaft automatically resets under the action of the reset spring so as to drive the thread trimming mechanism component to reset; when the driving motor rotates reversely, the first idler wheel abuts against the arc-shaped driving portion, the cam rotates to drive the driving rotating shaft to rotate, the driving rotating shaft rotates to lift the presser foot mechanism through the lifting arm, and meanwhile, the thread loosening work is completed through the thread loosening driving arm, the thread connecting rod and the thread loosening rocker arm.

According to the utility model, the roller wheel connection is additionally arranged between the cam and the guide shaft as well as between the cam and the driving rotating shaft, so that the roller wheel can reduce friction, and the effects of reducing noise and reducing energy loss are achieved; meanwhile, the wire shearing and presser foot lifting work is completed by one driving motor, mutual interference is avoided, and the wire shearing machine has the characteristics of reasonable structure, stable work and good reliability.

The above-described structure is only the best mode for carrying out the utility model, and is not intended to limit the scope of the utility model, and all equivalent changes made according to the structure, shape, principle, etc. of the present invention should fall within the scope of the utility model.

Claims

1. The utility model provides a four six lines of needles crank arm sewing machine lift presser foot and cut line drive arrangement, crank arm sewing machine includes barrel (1), horn (2) and aircraft nose (3), and aircraft nose (3) are located the top of barrel (1), and aircraft nose (3) link firmly the tip with horn (2), and the one end of horn (2) other end and barrel (1) links firmly its characterized in that: the head (3) is provided with a presser foot mechanism (4), a trimming mechanism component (5) and a driving mechanism, the driving mechanism comprises a driving motor (6) and a motor fixing seat (7), the motor fixing seat (7) is fixedly connected with the outer side of the head (3), the driving motor (6) is fixed on the motor fixing seat (7), an output shaft of the driving motor (6) is sleeved with a driving cam (8), the outer edge part of the cam (8) is provided with an arc driving part (81) and a driving flange part (82), the distance from the arc driving part (81) to the axis of the cam (8) is an Archimedes spiral which is gradually increased, the arc driving part (81) is connected with the input end of the presser foot lifting transmission mechanism, the driving flange part (82) is connected with the input end of the trimming transmission mechanism, the output end of the trimming transmission mechanism is connected with the trimming mechanism component (5), the output end of the presser foot transmission mechanism is connected with the presser foot mechanism (4).

2. The presser foot lifting and thread trimming drive device for a four-needle six-thread crank arm sewing machine as claimed in claim 1, wherein: the trimming transmission mechanism and the presser foot lifting transmission mechanism are arranged in the motor fixing seat (7), the trimming transmission mechanism comprises a fixing plate (71), the fixing plate (71) is fixedly connected with the motor fixing seat (7), an upper guide sleeve and a lower guide sleeve (72) are arranged on the fixing plate (71), a guide shaft (73) penetrates through the two guide sleeves (72) through a shaft sleeve, the lower end of the guide shaft (73) is connected with the trimming mechanism assembly (5), a driving sleeve (74) and a reset spring (75) are sleeved in the middle of the guide shaft (73), the upper end of the reset spring (75) abuts against the bottom of the driving sleeve (74), the lower end of the reset spring (75) abuts against the top of the lower guide sleeve, the reset spring (75) generates an upward acting force on the guide shaft (73), and the upper end of the guide shaft (73) is connected with a driving flange portion (82).

3. The presser foot lifting and thread trimming drive device for a four-needle six-thread crank arm sewing machine as claimed in claim 2, wherein: the presser foot lifting transmission mechanism comprises a driving rotating shaft (76), the driving rotating shaft (76) is pivoted on a motor fixing seat (7), the input end of the driving rotating shaft (76) is fixedly connected with a driving arm (77), the free end of the driving arm (77) is provided with a first roller (771), the first roller (771) abuts against an arc-shaped driving part (81), the output end of the driving rotating shaft (76) is fixedly connected with a lifting arm (78), and the output end of the lifting arm (78) is connected with a connecting seat (41) of the presser foot mechanism (4).

4. The presser foot lifting and thread trimming drive device for a four-needle six-thread crank arm sewing machine as claimed in claim 3, wherein: the middle part of the driving rotating shaft (76) is fixedly connected with a thread loosening driving arm (79), the thread loosening driving arm (79) is movably connected with a thread loosening rocker arm (92) through a thread loosening connecting rod (91), and the thread loosening rocker arm (92) is connected with a thread loosening mechanism of the crank arm sewing machine.

5. The presser foot lifting and thread trimming drive device for a four-needle six-thread crank arm sewing machine as claimed in claim 2, wherein: the driving flange part (82) is provided with a shaft hole parallel to the axial direction of the output shaft, a screw (83) penetrates through the shaft hole and is fixedly connected to the driving flange part (82), a second roller (84) coaxial with the screw is arranged on the screw (83), and the second roller (84) abuts against the top of the guide shaft (73).

6. The presser foot lifting and thread trimming drive device for a four-needle six-thread crank arm sewing machine as claimed in claim 2, wherein: the fixed plate (71) is also provided with a guide rail, the direction of the guide rail is parallel to the guide shaft, one side of the driving sleeve (74) is provided with a guide block, and the guide block is accommodated in the guide rail.