CN214193705U

CN214193705U - Single-motor flat car sewing machine

Info

Publication number: CN214193705U
Application number: CN202022976534.1U
Authority: CN
Inventors: 叶仙冲; 阮卜根
Original assignee: Zhejiang Doso Sewing Machine Co ltd
Current assignee: Zhejiang Doso Sewing Machine Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-09-14
Anticipated expiration: 2030-12-08

Abstract

The utility model belongs to the technical field of sewing machine, a single motor flatcar sewing machine is related to, include aircraft nose, base, trimming subassembly, lift presser foot subassembly and be in the same direction as seam backstitch stitch gauge adjustment assembly, one side of aircraft nose is provided with the motor, the cover is equipped with the driving-disc and lifts the presser foot cam on the output shaft of motor, the driving-disc can be detached with being in the same direction as seam backstitch stitch gauge adjustment assembly and be connected, lift the presser foot cam and lift the corresponding setting of presser foot subassembly, be provided with the trimming electro-magnet of drive trimming subassembly action in the base, the motor drives respectively when rotating to the not equidirectional the backstitch stitch gauge adjustment action and lifts the presser foot action, and the trimming electro-magnet drives the trimming action alone. The utility model provides a single motor flatcar sewing machine, its simple structure has reduced the part assembly, accurate control each item function simultaneously.

Description

Single-motor flat car sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a single motor flatcar sewing machine is related to.

Background

The traditional stitch length adjusting mode of the flat sewing machine mostly uses a stepping motor. When the sewing machine is used for sewing, the stepping motor rotates anticlockwise for a certain angle, the crank at the end of the motor shaft drives the needle pitch adjusting connecting rod to move upwards for a certain distance, so that the needle pitch adjusting crank connected to the other end of the needle pitch adjusting connecting rod swings anticlockwise for a certain amplitude, the moving direction of the cloth feeding mechanism is the same as the moving direction of the main shaft, the forward feeding is adopted as the feeding, the maximum motion amount of the cloth feeding mechanism is the maximum needle pitch required by sewing, and the change of the needle pitch during the sewing can be realized by changing the anticlockwise rotating angle of the stepping motor; during backstitch, the stepping motor rotates clockwise by a certain angle, the crank at the end of the motor shaft drives the needle pitch adjusting connecting rod to move downwards by a certain distance, so that the needle pitch adjusting crank connected to the other end of the needle pitch adjusting connecting rod swings clockwise by a certain amplitude, the movement direction of the cloth feeding mechanism is opposite to that of the main shaft, reverse feeding is adopted for feeding, the maximum movement amount of the cloth feeding mechanism is the maximum needle pitch required by sewing, and the change of the needle pitch during backstitch can be realized by changing the clockwise rotation angle of the stepping motor. The thread cutting mechanism and the presser foot lifting mechanism mostly use electromagnets. And the thread trimming mechanism and the presser foot lifting mechanism are two mutually independent mechanisms which are respectively driven by two electromagnets.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, provide a single motor flatcar sewing machine, its simple structure has reduced the part assembly, accurate control each item function simultaneously.

In order to solve the above technical problem, the purpose of the present invention can be achieved by the following technical solutions:

a single-motor flat car sewing machine comprises a machine head, a base, a thread trimming component, a presser foot lifting component and a back stitching and backstitch needle distance adjusting component, wherein a motor is arranged on one side of the machine head, a driving disc and a presser foot lifting cam are sleeved on an output shaft of the motor, the driving disc is detachably connected with the back stitching and backstitch needle distance adjusting component, the presser foot lifting cam is arranged corresponding to the presser foot lifting component, a thread trimming electromagnet for driving the thread trimming component to move is arranged in the base, when the motor rotates towards different directions, the motor respectively drives the back stitching and backstitch needle distance adjusting motion and the presser foot lifting motion, and the thread trimming electromagnet independently drives the thread trimming motion.

In the single-motor flatcar sewing machine, the presser foot lifting cam is arranged corresponding to the lower end of the presser foot lifting ejector rod, the upper end of the presser foot lifting ejector rod is connected with one end of a presser foot connecting rod, the other end of the presser foot connecting rod is connected with one end of a pull rod, the other end of the pull rod is connected with the presser foot assembly, the presser foot assembly comprises a presser foot, a presser foot rod and a drive plate, the pull rod pulls the drive plate to rotate, and the presser foot rod rises along with the pull rod to complete the presser foot lifting action.

In the single-motor flatcar sewing machine, the lower end of the presser foot lifting ejector rod is provided with a flat plate structure in contact connection with the presser foot lifting cam, and the upper end of the presser foot lifting ejector rod is provided with a fork-shaped structure in connection with the presser foot connecting rod.

In the single-motor flat car sewing machine, the valve core of the trimming electromagnet is connected with the trimming drive rod, the trimming crank is arranged on the trimming drive rod, the trimming cam matched with the trimming crank is arranged on the drive shaft on one side of the trimming drive rod, the trimming electromagnet drives the trimming drive rod to move forwards, the trimming crank reaches the position corresponding to the trimming cam, the trimming cam drives the trimming crank to drive the trimming drive rod to rotate when the drive shaft rotates, the trimming drive rod drives the trimming swing seat to act to complete trimming, the trimming electromagnet retracts after trimming is completed, the trimming drive rod resets under the drive of the reset device, and the trimming crank is separated from the trimming cam.

In the single-motor flatcar sewing machine, the forward sewing backstitch stitch length adjusting assembly comprises a swinging assembly and a swinging connecting rod, an arc-shaped notch is formed in one side, opposite to the driving disc, of the swinging connecting rod, a guide ball detachably connected with the arc-shaped notch is arranged on the driving disc, the arc-shaped notch is separated from the guide ball when the sewing machine lifts the presser foot, and the arc-shaped notch is in abutting connection with the guide ball when the sewing machine performs forward sewing backstitch stitch length adjusting action.

In the single-motor flat car sewing machine, one side of the swing connecting rod is provided with the driving electromagnet which can drive the arc-shaped notch to be separated from the guide ball, and the other side of the swing connecting rod is provided with the spring which guides the arc-shaped notch to the guide ball.

In the single-motor flat car sewing machine, the driving electromagnet is fixed on the machine head through the electromagnet mounting plate, the valve core of the driving electromagnet is fixed with the guide support, and the U-shaped groove at the front end of the guide support is in contact connection with the swinging connecting rod.

In the single-motor flat car sewing machine, the spring is fixed in the spring seat, the spring seat is fixed on the machine head through the spring mounting plate, the spring seat is provided with the axial sliding groove, the swinging connecting rod is arranged in the axial sliding groove in a sliding mode, and the front end of the spring is provided with the small ball in contact connection with the swinging connecting rod.

In the single-motor flat car sewing machine, an arc-shaped notch is formed in one side, away from the driving disc, of the upper end of the swing connecting rod, a limiting ball matched with the swing connecting rod is arranged in the machine head, the limiting ball is installed on the limiting support, and the limiting ball is connected with the arc-shaped notch in a contact mode after the driving electromagnet drives the swing connecting rod.

Compared with the prior art, the utility model, following beneficial effect has:

1. the utility model discloses a motor drive is just sewing the stitch length of backstitch and is adjusted and lift the three action of presser foot to reduce part structure, alleviateed the machine noise, improved the working efficiency, practiced thrift the cost.

2. The utility model discloses a driving-disc and be connected that can break away from in the same direction as seam backstitch gauge needle adjusting part, when sewing machine lifted the presser foot action, the driving-disc broke away from with seam backstitch gauge needle adjusting part, did not touch in the same direction as seam backstitch gauge needle adjusting action for the dental articulator keeps motionless when lifting the presser foot, guarantees that the clothes stitch is even unchangeable.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of the internal structure of the present invention;

FIG. 3 is a perspective view of the internal structure of the present invention;

FIG. 4 is a perspective view of the driving plate of the present invention engaged with the swing link;

fig. 5 is a perspective view of the swing link limiting structure of the present invention;

reference numerals: 1. a machine head; 2. a base; 3. a motor; 4. an output shaft; 5. a drive disc; 6. lifting a presser foot cam; 7. a trimming electromagnet; 8. lifting a presser foot ejector rod; 9. a presser foot connecting rod; 10. a pull rod; 11. a trimming drive rod; 12. a thread cutting crank; 13. a drive shaft; 14. a trimming cam; 15. a swing assembly; 16. a swing link; 17. a guide ball; 18. driving an electromagnet; 19. a spring; 20. an electromagnet mounting plate; 21. a guide bracket; 22. a spring seat; 23. a spring mounting plate; 24. a pellet; 25. limiting balls; 26. and a limiting bracket.

Detailed Description

The invention will be further described in the following with reference to specific embodiments thereof, with reference to the accompanying drawings, in which figures 1 to 5:

a single-motor flat car sewing machine comprises a machine head 1, a base 2, a thread trimming component, a presser foot lifting component and a back stitching needle distance adjusting component, wherein a motor 3 is arranged on one side of the machine head 1, a driving disc 5 and a presser foot lifting cam 6 are sleeved on an output shaft 4 of the motor 3, the driving disc 5 is detachably connected with the back stitching needle distance adjusting component, the presser foot lifting cam 6 and the presser foot lifting component are correspondingly arranged, a thread trimming electromagnet 7 for driving the thread trimming component to act is arranged in the base 2, the motor 3 drives the back stitching needle distance adjusting action and the presser foot lifting action respectively when rotating towards different directions, and the thread trimming electromagnet 7 drives the thread trimming action independently.

The driving structure for the presser foot lifting action is as follows: the presser foot lifting cam 6 is arranged corresponding to the lower end of the presser foot lifting ejector rod 8, the upper end of the presser foot lifting ejector rod 8 is connected with one end of a presser foot connecting rod 9, the other end of the presser foot connecting rod 9 is connected with one end of a pull rod 10, the other end of the pull rod 10 is connected with a presser foot component, the presser foot component comprises a presser foot, a presser foot rod and a drive plate, the drive plate is pulled by the pull rod 10 to rotate, and the presser foot rod rises along with the presser foot rod to complete the presser foot lifting action.

Further, the lower end of the presser foot lifting ejector rod 8 is provided with a flat plate structure in contact connection with the presser foot lifting cam 6, and the upper end of the presser foot lifting ejector rod 8 is provided with a fork-shaped structure connected with the presser foot connecting rod 9.

The driving structure of the thread cutting action is as follows: the spool of the trimming electromagnet 7 is connected with the trimming drive rod 11, the trimming crank 12 is arranged on the trimming drive rod 11, the trimming cam 14 matched with the trimming crank 12 is arranged on the drive shaft 13 on one side of the trimming drive rod 11, the trimming electromagnet 7 drives the trimming drive rod 11 to move forwards, the trimming crank 12 reaches the position corresponding to the trimming cam 14, the trimming cam 14 drives the trimming crank 12 to drive the trimming drive rod 11 to rotate when the drive shaft 13 rotates, the trimming drive rod 11 drives the trimming swing seat to move to complete trimming, the trimming electromagnet 7 retracts after trimming is completed, the trimming drive rod 11 resets under the drive of the reset device, and the trimming crank 12 is separated from the trimming cam 14.

Referring to fig. 4, the structure that the driving disk 5 and the forward-stitching and backward-stitching needle distance adjusting component can be detachably connected is as follows: the forward sewing and backstitch stitch length adjusting assembly comprises a swinging assembly 15 and a swinging connecting rod 16, an arc-shaped notch is formed in one side, opposite to the driving disk 5, of the swinging connecting rod 16, a guide ball 17 detachably connected with the arc-shaped notch is arranged on the driving disk 5, the arc-shaped notch is separated from the guide ball 17 when the presser foot lifting action is carried out on the sewing machine, and the arc-shaped notch is connected with the guide ball 17 in an abutting mode when the forward sewing and backstitch stitch length adjusting action is carried out on the sewing machine.

Further, one side of the swing link 16 is provided with a driving electromagnet 18 which can drive the arc-shaped notch to be separated from the guide ball 17, and the other side of the swing link 16 is provided with a spring 19 which guides the arc-shaped notch to the guide ball 17.

The specific structure of the driving electromagnet 18 is: the driving electromagnet 18 is fixed on the machine head 1 through an electromagnet mounting plate 20, a guide support 21 is fixed on a valve core of the driving electromagnet 18, and a U-shaped groove at the front end of the guide support 21 is in contact connection with the swinging connecting rod 16.

The specific structure of the spring 19 is: the spring 19 is fixed in a spring seat 22, the spring seat 22 is fixed on the handpiece 1 through a spring mounting plate 23, an axial sliding groove is formed in the spring seat 22, the swinging connecting rod 16 is arranged in the axial sliding groove in a sliding mode, and a small ball 24 in contact connection with the swinging connecting rod 16 is arranged at the front end of the spring 19.

Referring to fig. 5, an arc notch is formed in one side of the upper end of the swing connecting rod 16, which is far away from the driving disc 5, a limiting ball 25 matched with the arc notch is arranged in the handpiece 1, the limiting ball 25 is mounted on a limiting bracket 26, and the driving electromagnet 18 drives the swing connecting rod 16, so that the limiting ball 25 is in contact connection with the arc notch, and the swing connecting rod 16 is prevented from shaking up and down.

The utility model discloses a work flow is:

thread trimming: the trimming electromagnet 7 drives the trimming driving rod 11 to move forwards, the trimming cam 14 drives the trimming crank 12 to drive the trimming driving rod 11 to rotate when the driving shaft 13 rotates, the trimming driving rod 11 drives the trimming swinging seat to move to complete trimming, and the trimming electromagnet 7 and the trimming driving rod 11 reset after trimming is completed.

A presser foot lifting action: when the output shaft 4 of the motor 3 rotates at the presser foot lifting angle, the output shaft 4 drives the driving disc 5 and the presser foot lifting cam 6 to rotate along with the output shaft. The valve core of the driving electromagnet 18 extends out of the driving guide ball 17 to separate from the arc notch, and the driving disk 5 does not touch the forward sewing and backward sewing needle distance adjusting component to act when rotating. The presser foot lifting cam 7 pushes the presser foot lifting ejector rod 8 to move upwards, the presser foot lifting ejector rod 8 drives the presser foot connecting rod 9 to rotate, the rotary presser foot connecting rod 9 pulls the pull rod 10, and the pull rod 10 pulls the presser foot assembly to complete presser foot lifting.

Adjusting the forward sewing and backward sewing stitch length: the spool of the driving electromagnet 18 is retracted and the spring 19 drives the guide ball 17 into engagement with the arcuate notch. The presser foot lifting cam 6 does not touch the presser foot lifting ejector rod 8 in the angle range, so that the presser foot lifting action is not touched. When the driving disc 5 rotates, the guide ball 17 drives the swing connecting rod 16 to move upwards or downwards, and the swing connecting rod 16 drives the swing component 15 to move so as to respectively complete the adjustment of the forward sewing stitch length and the backward sewing stitch length.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A single-motor flat car sewing machine comprises a machine head (1), a base (2), a thread trimming component, a presser foot lifting component and a forward sewing and backstitch needle distance adjusting component, and is characterized in that a motor (3) is arranged on one side of the machine head (1), a driving disc (5) and a presser foot lifting cam (6) are sleeved on an output shaft (4) of the motor (3), the driving disc (5) is detachably connected with the forward sewing and backstitch needle distance adjusting component, the presser foot lifting cam (6) is correspondingly arranged, and a thread trimming electromagnet (7) for driving the thread trimming component to move is arranged in the base (2).

2. The single-motor flatcar sewing machine of claim 1, wherein the presser foot lifting cam (6) is disposed corresponding to a lower end of a presser foot lifting ram (8), an upper end of the presser foot lifting ram (8) is connected to one end of a presser foot link (9), the other end of the presser foot link (9) is connected to one end of a pull rod (10), and the other end of the pull rod (10) is connected to the presser foot assembly.

3. The single-motor flatcar sewing machine of claim 2, wherein the lower end of the presser foot lifting rod (8) is provided with a flat plate structure in contact connection with the presser foot lifting cam (6), and the upper end of the presser foot lifting rod (8) is provided with a fork structure in connection with the presser foot link (9).

4. The single-motor flat car sewing machine of claim 1, characterized in that the spool of the trimming electromagnet (7) is connected with a trimming driving rod (11), the trimming driving rod (11) is provided with a trimming crank (12), and a trimming cam (14) matched with the trimming crank (12) is arranged on a driving shaft (13) at one side of the trimming driving rod (11).

5. The single-motor flat car sewing machine according to claim 1, wherein the forward and backward sewing stitch length adjusting assembly comprises a swinging assembly (15) and a swinging connecting rod (16), an arc-shaped notch is formed in one side of the swinging connecting rod (16) opposite to the driving disc (5), and a guide ball (17) detachably connected with the arc-shaped notch is arranged on the driving disc (5).

6. Single motor flatcar sewing machine according to claim 5, characterized in that one side of the swing link (16) is provided with a driving electromagnet (18) that can drive the arc-shaped notch out of the guide ball (17), and the other side of the swing link (16) is provided with a spring (19) that guides the arc-shaped notch to the guide ball (17).

7. The single-motor flat car sewing machine according to claim 6, characterized in that the driving electromagnet (18) is fixed on the machine head (1) through an electromagnet mounting plate (20), a guide bracket (21) is fixed on a valve core of the driving electromagnet (18), and a U-shaped groove at the front end of the guide bracket (21) is in contact connection with the swing connecting rod (16).

8. The single-motor flat car sewing machine according to claim 6, wherein the spring (19) is fixed in a spring seat (22), the spring seat (22) is fixed on the machine head (1) through a spring mounting plate (23), an axial sliding groove is formed in the spring seat (22), the swing connecting rod (16) is slidably arranged in the axial sliding groove, and a small ball (24) in contact connection with the swing connecting rod (16) is arranged at the front end of the spring (19).

9. The single-motor flat car sewing machine according to claim 6, wherein an arc-shaped notch is formed in one side of the upper end of the swing connecting rod (16) far away from the driving disc (5), a limiting ball (25) matched with the arc-shaped notch is arranged in the machine head (1), and the limiting ball (25) is mounted on the limiting bracket (26).