CN212834426U

CN212834426U - Presser foot adjusting device of sewing machine

Info

Publication number: CN212834426U
Application number: CN202021399245.3U
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 machines, and relates to a presser foot adjusting device of a sewing machine, which comprises an eccentric seat driven by a motor to rotate in a reciprocating manner, wherein the eccentric seat is eccentrically hinged with the upper end of a pull rod, the lower end of the pull rod is hinged with a presser foot component, and the eccentric seat drives the pull rod to reciprocate and drives the presser foot component to move up and down; when the eccentric seat rotates downwards, the pull rod moves downwards while rotating around the hinge point to press the presser foot component to move downwards; when the eccentric seat rotates upwards, the pull rod moves upwards while rotating around the hinge point, and the presser foot assembly is pulled to move upwards. 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 presser foot adjusting device of the sewing machine comprises an eccentric seat driven by a motor to rotate in a reciprocating mode, the eccentric seat is eccentrically hinged to the upper end of a pull rod, the lower end of the pull rod is hinged to a presser foot component, and the eccentric seat drives the pull rod to move in a reciprocating mode and drives the presser foot component to move up and down.

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 hinged with the connecting rod, a presser foot rod is fixedly arranged in the presser foot guide block in a penetrating way, 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 hinge point of the pull rod and the presser foot guide block is positioned on one side of the left end surface or the right end surface of the presser foot guide block.

The pull rod is hinged with the eccentric seat and the presser foot guide block through the fixing bolt, the bolt rod of the fixing bolt comprises a thread part and a polished rod part, the thread part is in threaded connection with the eccentric seat and the presser foot guide block, and the pull rod is rotatably sleeved on the polished rod part.

The eccentric seat is a ring-shaped piece provided with an open slot, a fastening bolt for fixing the eccentric seat is arranged in the open slot, and a hinged joint of the eccentric seat and the pull rod is positioned below the eccentric seat in an inclined manner.

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 pull rod are all arranged in the shell of the sewing machine.

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 at A of FIG. 2;

FIG. 4 is an enlarged view at B of FIG. 2;

reference numerals: 1. a motor; 2. an eccentric seat; 3. a pull rod; 4. an output shaft; 5. a first swing rod; 6. a connecting rod; 7. a second swing rod; 8. a drive shaft; 9. a presser foot guide block; 10. a presser bar; 11. a presser foot; 12. an open slot; 13. a swing rod mounting seat; 14. a swing rod connecting plate; 15. 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:

a presser foot adjusting device of a sewing machine comprises an eccentric seat 2 driven by a motor 1 to rotate in a reciprocating mode, wherein the eccentric seat 2 is eccentrically hinged with the upper end of a pull rod 3, the lower end of the pull rod 3 is hinged with a presser foot component, and the eccentric seat 2 drives the pull rod 3 to move in a reciprocating mode and drives the presser foot component to move up and down.

Referring to fig. 2, the manner of the pull rod 3 driving the presser foot assembly to move up and down is as follows: when the eccentric seat 2 rotates downwards, namely the eccentric seat 2 in the attached drawing 2 rotates clockwise, the pull rod moves downwards while rotating around the hinge point, and the downward moving pull rod presses the presser foot assembly to move downwards; when the eccentric seat 2 rotates upward, that is, the eccentric seat 2 rotates counterclockwise in fig. 2, the pull rod moves upward while rotating around the hinge point, and the upward moving pull rod pulls the presser foot assembly to move upward.

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 5 is fixedly sleeved on an output shaft 4 of the motor 1, the outer end of the first swing rod 5 is hinged to one end of a connecting rod 6, the other end of the connecting rod 6 is hinged to the outer end of a second swing rod 7, the second swing rod 7 is fixedly sleeved on one end of a transmission shaft 8, and an eccentric seat 2 is fixedly sleeved on the other end of the transmission shaft 8. When the motor 1 rotates in a reciprocating way, the connecting rod 6 is driven to do reciprocating motion, the connecting rod 6 drives the transmission shaft 8 to do reciprocating rotation, and the eccentric seat 2 rotates in a reciprocating way along with the transmission shaft.

The presser foot component comprises a presser foot guide block 9 hinged with the pull rod 3, a presser foot rod 10 is fixedly arranged in the presser foot guide block 9 in a penetrating way, and a presser foot 11 is arranged at the lower end of the presser foot rod 10. Further, an external pressure foot sleeve is arranged outside the foot pressing rod 10, and the pressure foot 11 is arranged on the foot pressing seat.

The hinge point of the pull rod 3 and the presser foot guide block 9 is positioned on one side of the left end surface or the right end surface of the presser foot guide block 9.

The pull rod 3 is hinged with the eccentric seat 2 and the presser foot guide block 9 through fixing bolts, a bolt rod of each fixing bolt comprises a thread part and a polished rod part, the thread part is in threaded connection with the eccentric seat 2 and the presser foot guide block 9, and the pull rod 3 is rotatably sleeved on the polished rod part.

Referring to fig. 4, the eccentric seat 2 is a ring-shaped member having an opening groove 12, a fastening bolt for fixing the eccentric seat 2 is disposed in the opening groove 12, and a hinge point between the eccentric seat 2 and the pull rod 3 is located obliquely below the eccentric seat 2.

Referring to fig. 3, the first swing link 5 and the second swing link 7 have the same structure, and include a swing link mounting seat 13 and a swing link connecting plate 14 disposed in an inclined manner.

Referring to fig. 1, the motor 1 is installed on the side of the sewing machine housing 15 opposite to the presser foot assembly, and the output shaft 4 and the transmission shaft 8 are arranged in parallel and transversely. The output shaft 4, the connecting rod 6, the transmission shaft 8, the eccentric seat 2 and the pull rod 3 are all arranged in a sewing machine shell 15.

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, wherein the eccentric seat (2) is eccentrically hinged with the upper end of a pull rod (3), the lower end of the pull rod (3) is hinged with a presser foot component, and the eccentric seat (2) drives the pull rod (3) to move in a reciprocating mode and drives the presser foot component to move up and down.

2. A presser foot adjustment device of a sewing machine according to claim 1, wherein the output shaft (4) of the motor (1) is fixedly sleeved with a first swing rod (5), the outer end of the first swing rod (5) is hinged with one end of a connecting rod (6), the other end of the connecting rod (6) is hinged with the outer end of a second swing rod (7), the second swing rod (7) is fixedly sleeved with one end of a transmission shaft (8), and the other end of the transmission shaft (8) is fixedly sleeved with the eccentric seat (2).

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 (9) hinged with the connecting rod, a presser foot rod (10) is fixed in the presser foot guide block (9) in a penetrating way, and a presser foot (11) is arranged at the lower end of the presser foot rod (10).

4. Presser foot adjustment arrangement according to claim 3, wherein the hinge point of the pull rod (3) to the presser foot guide (9) is located at one side of the left or right end face of the presser foot guide (9).

5. Presser foot adjustment device according to claim 3, wherein the eccentric holder (2) is a ring shaped member provided with an open slot (12), a fastening bolt for fixing the eccentric holder (2) is provided in the open slot (12), and the hinge point of the eccentric holder (2) and the pull rod (3) is located obliquely below the eccentric holder (2).

6. The presser foot adjustment device of a sewing machine according to claim 2, wherein the first swing link (5) and the second swing link (7) have the same structure and comprise a swing link mounting seat (13) and a swing link connecting plate (14) 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 (15) opposite to a presser foot assembly, and said output shaft (4) and the drive shaft (8) are arranged parallel to each other and transversely.