CN212834425U

CN212834425U - Presser foot adjusting device of sewing machine

Info

Publication number: CN212834425U
Application number: CN202021397563.6U
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: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-03-30
Anticipated expiration: 2030-07-15

Abstract

The utility model belongs to the technical field of sewing machine, a sewing machine's presser foot adjusting device is related to, adjusting device includes the reciprocal pivoted eccentric seat of motor drive, eccentric being provided with the bulb on the eccentric seat, adjusting device still includes the regulating plate, the lower extreme and the presser foot subassembly of regulating plate are connected, and the up end of regulating plate vertically is provided with the regulation recess, the bulb slides and establishes in the regulation recess and drive regulating plate downstream, the cover is equipped with drive regulating plate rebound's return spring on the presser foot subassembly, and when the bulb rotates downwards, bulb oppression regulating plate downstream thereupon, when the bulb upwards rotates, the bulb drives the regulating plate upward movement thereupon, and the bulb slides around in the regulation recess simultaneously, drives the presser foot subassembly and reciprocates when the regulating plate. The utility model provides a presser foot adjusting device of sewing machine, its transmission simple structure is reliable, can realize distance and pressure between automatically regulated presser foot and cloth.

Description

Presser foot adjusting device of sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a presser foot adjusting device of sewing machine is related to.

Background

The existing presser foot lifting and putting down mechanism of the sewing machine is driven by manpower, an electromagnet or an air cylinder, and has the defects of high labor intensity, high noise and uncontrollable stroke. In addition, in such a presser foot raising and lowering mechanism, the pressure of the presser foot is generally manually adjusted by a nut and cannot be automatically adjusted.

The chinese patent application CN 106978674 a discloses an automatic presser foot lifting and pressure adjusting device of a sewing machine, which comprises a motor, wherein the motor is driven by a pedal or a controller; an output shaft of the motor is fixedly connected with a driven gear; the driven gear is connected with one end of a pull rod through a pin, the other end of the pull rod is connected with the fixed end of a triangular plate, and the swinging end of the triangular plate is fixedly connected with a sliding block through a screw pin; the slide block is movably arranged in a slide block groove of the crank; the crank is fixedly connected with a presser foot sleeve, a presser foot rod penetrates through the presser foot sleeve, and a spring is sleeved on the presser foot rod; the presser bar is connected with the presser sleeve through a spring; the bottom end of the presser bar is fixedly connected with the presser foot; a displacement sensor is arranged on one side of the presser foot and fixedly arranged on the shell of the sewing machine; the displacement sensor is connected with a controller of the motor in a wired or wireless mode. The defects of the device are that the transmission structure is complex, the cost is high and the device is easy to break down.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, a sewing machine's presser foot adjusting device, its transmission simple structure is reliable, can realize distance and pressure between automatically regulated presser foot and cloth.

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

the utility model provides a presser foot adjusting device of sewing machine, adjusting device includes the reciprocal pivoted eccentric seat of motor drive, eccentric being provided with the bulb on the eccentric seat, adjusting device still includes the regulating plate, the lower extreme and the presser foot subassembly of regulating plate are connected, and the up end of regulating plate vertically is provided with the adjustment recess, the bulb slides and establishes in the adjustment recess and drive regulating plate downstream, the cover is equipped with the return spring that drives regulating plate upstream on the presser foot subassembly, and when the bulb downstream, bulb oppression regulating plate downstream thereupon, when the bulb upstream, the bulb drives the regulating plate upstream thereupon, and the bulb slides around in the adjustment recess simultaneously, drives presser foot subassembly and reciprocates when the regulating plate reciprocates.

The output shaft of the motor is sleeved and fixed with a first swing rod, the outer end of the first swing rod is hinged to one end of a connecting rod, the other end of the connecting rod is hinged to the outer end of a second swing rod, the two ends of the swing rods are sleeved and fixed at one end of a transmission shaft, and the other end of the transmission shaft is sleeved and fixed with an eccentric seat.

The presser foot component comprises a presser foot guide block fixedly connected with the adjusting plate, a presser foot rod is fixedly arranged in the presser foot guide block in a penetrating manner, and a presser foot is arranged at the lower end of the presser foot rod. Furthermore, an external pressure foot sleeve is arranged outside the pressure foot rod, and the pressure foot is arranged on the pressure foot seat.

The eccentric seat is a ring-shaped part provided with an open slot, a fastening bolt for fixing the eccentric seat is arranged in the open slot, and the ball head is installed below the eccentric seat in an inclined manner through the installation bolt.

The ball head can be fixed on the mounting bolt and can also be rotatably arranged on the mounting bolt, for example, the ball head selects a bearing and is sleeved on the mounting bolt. Preferably, the ball head is rotatably arranged on the mounting bolt, and the moving mode of the ball head in the adjusting groove is rolling friction.

The first swing rod and the second swing rod have the same structure and comprise swing rod installation seats and swing rod connecting plates which are obliquely arranged.

The motor is arranged on one side of the sewing machine shell opposite to the presser foot component, and the output shaft and the transmission shaft are parallel to each other and arranged transversely. The output shaft, the connecting rod, the transmission shaft, the eccentric seat and the adjusting plate are all arranged in the sewing machine shell.

The return spring is arranged between the presser foot guide block and the bottom of the inner wall of the sewing machine shell.

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

the utility model discloses a motor drive lifts the presser foot and reciprocates, can also accomplish the operation of lifting the presser foot automatically when needing according to distance and the pressure between the thickness automatically regulated presser foot of cloth and cloth. The utility model discloses reduce the requirement and the artifical foot control operation to operating skill, reduce intensity of labour, improve work efficiency. And simultaneously, the utility model discloses a transmission simple structure, the operation is stable, and the fault rate is low.

Drawings

FIG. 1 is a perspective view of the sewing machine of the present invention;

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

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 2;

reference numerals: 1. a motor; 2. an eccentric seat; 3. a ball head; 4. an adjusting plate; 5. adjusting the groove; 6. a rebound spring; 7. an output shaft; 8. a first swing rod; 9. a connecting rod; 10. a second swing rod; 11. a drive shaft; 12. a presser foot guide block; 13. a presser bar; 14. a presser foot; 15. an open slot; 16. installing a bolt; 17. a swing rod mounting seat; 18. a swing rod connecting plate; 19. the sewing machine shell.

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 4:

the utility model provides a presser foot adjusting device of sewing machine, adjusting device includes motor 1 drive reciprocating rotation's eccentric seat 2, eccentric being provided with bulb 3 on the eccentric seat 2, adjusting device still includes regulating plate 4, the lower extreme and the presser foot subassembly of regulating plate 4 are connected, and the up end of regulating plate 4 vertically is provided with adjusts recess 5, bulb 3 slides and establishes in adjusting recess 5 and drive regulating plate 4 downstream, the cover is equipped with the return spring 6 that drives regulating plate 4 rebound on the presser foot subassembly, drives the presser foot subassembly and reciprocates when regulating plate 4 reciprocates.

Referring to fig. 2, the adjusting plate 4 is driven by the ball 3 and the return spring 6 to move up and down in the following way: when the ball head 3 rotates downwards, namely the eccentric seat 2 rotates clockwise, the ball head 3 generates downward pressure on the adjusting plate 4, the ball head 3 presses the adjusting plate 4 to move downwards along with the downward pressure, the return spring 6 is compressed, and meanwhile, the ball head 3 slides forwards in the adjusting groove 5; when the ball head 3 rotates upwards, namely the eccentric seat 2 rotates anticlockwise, the pressure of the ball head 3 on the adjusting plate 4 disappears, the ball head 3 drives the adjusting plate 4 to move upwards along with the pressure, and meanwhile, the ball head 3 slides backwards in the adjusting groove 5.

Referring to fig. 2, the transmission structure for driving the eccentric seat 2 to rotate back and forth by the motor 1 is as follows: a first swing rod 8 is fixedly sleeved on an output shaft 7 of the motor 1, the outer end of the first swing rod 8 is hinged to one end of a connecting rod 9, the other end of the connecting rod 9 is hinged to the outer end of a second swing rod 10, the second swing rod 10 is fixedly sleeved on one end of a transmission shaft 11, and an eccentric seat 2 is fixedly sleeved on the other end of the transmission shaft 11. When the motor 1 rotates in a reciprocating manner, the connecting rod 9 is driven to do reciprocating movement, the connecting rod 9 drives the transmission shaft 11 to do reciprocating rotation, and the eccentric seat 2 rotates in a reciprocating manner along with the transmission shaft.

The presser foot component comprises a presser foot guide block 12 fixedly connected with the adjusting plate 4, a presser foot rod 13 is fixedly arranged in the presser foot guide block 12 in a penetrating way, and a presser foot 14 is arranged at the lower end of the presser foot rod 13. Further, an external pressure foot sleeve is arranged outside the pressure foot rod 13, and the pressure foot 14 is arranged on the pressure foot seat.

The return spring 6 is provided between the presser foot guide 12 and the inner wall bottom of the sewing machine housing 19. The return spring 6 is always in a compressed state and exerts an upward force on the presser foot guide 12.

Referring to fig. 4, the eccentric seat 2 is a ring-shaped member having an open slot 15, a fastening bolt for fixing the eccentric seat 2 is disposed in the open slot 15, and the ball 3 is mounted obliquely below the eccentric seat 2 by a mounting bolt 16.

The ball 3 may be fixed to the mounting bolt 16, or may be rotatably disposed on the mounting bolt 16, for example, the ball 3 may be a bearing and sleeved on the mounting bolt 16. Preferably, the ball 3 is rotatably disposed on the mounting bolt 16, and the moving manner of the ball 3 in the adjusting groove 5 is rolling friction, so as to reduce the friction between the ball 3 and the adjusting groove 5, and make the movement smoother.

Referring to fig. 3, the first swing link 8 and the second swing link 10 have the same structure, and include a swing link mounting seat 17 and a swing link connecting plate 18 disposed in an inclined manner.

Referring to fig. 1, the motor 1 is installed on the side of the sewing machine housing 19 opposite to the presser foot assembly, and the output shaft 7 and the transmission shaft 11 are arranged parallel and transversely to each other. The output shaft 7, the connecting rod 9, the transmission shaft 11, the eccentric seat 2 and the adjusting plate 4 are all arranged in a sewing machine shell 19.

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. The presser foot adjusting device of the sewing machine is characterized by comprising an eccentric seat (2) driven by a motor (1) to rotate in a reciprocating mode, a ball head (3) is eccentrically arranged on the eccentric seat (2), the adjusting device further comprises an adjusting plate (4), the lower end of the adjusting plate (4) is connected with a presser foot assembly, an adjusting groove (5) is longitudinally formed in the upper end face of the adjusting plate (4), the ball head (3) is slidably arranged in the adjusting groove (5) and drives the adjusting plate (4) to move downwards, and a return spring (6) for driving the adjusting plate (4) to move upwards is sleeved on the presser foot assembly.

2. A presser foot adjustment device of a sewing machine according to claim 1, wherein a first swing link (8) is fixedly sleeved on an output shaft (7) of the motor (1), an outer end of the first swing link (8) is hinged with one end of a connecting rod (9), the other end of the connecting rod (9) is hinged with an outer end of a second swing link (10), the second swing link (10) is fixedly sleeved on one end of a transmission shaft (11), and an eccentric seat (2) is fixedly sleeved on the other end of the transmission shaft (11).

3. A presser foot adjustment device of sewing machine according to claim 1, characterized in that the presser foot assembly comprises a presser foot guide block (12) fixedly connected with the adjustment plate (4), a presser foot rod (13) is fixedly inserted into the presser foot guide block (12), and a presser foot (14) is provided at the lower end of the presser foot rod (13).

4. Presser foot adjustment device according to claim 3, wherein the eccentric holder (2) is a ring shaped member provided with an open slot (15), a fastening bolt for fixing the eccentric holder (2) is provided in the open slot (15), and the ball head (3) is mounted obliquely below the eccentric holder (2) by means of a mounting bolt (16).

5. Presser foot adjustment device according to claim 1, wherein the ball head (3) is rotatably arranged on the mounting bolt (16), and the movement of the ball head (3) in the adjustment groove (5) is rolling friction.

6. The presser foot adjustment device of a sewing machine according to claim 2, wherein the first swing link (8) and the second swing link (10) have the same structure and comprise a swing link mounting seat (17) and a swing link connecting plate (18) which is obliquely arranged.

7. A presser foot adjustment device of a sewing machine according to claim 2, wherein said motor (1) is mounted on a side of a sewing machine housing (19) opposite to the presser foot assembly, and said output shaft (7) and the drive shaft (11) are arranged parallel to each other and transversely.

8. A presser foot adjustment device of a sewing machine according to claim 3, wherein said return spring (6) is provided between the presser foot guide (12) and the bottom of the inner wall of the sewing machine housing (19).