CN214496709U

CN214496709U - Middle presser foot mechanism of sewing machine

Info

Publication number: CN214496709U
Application number: CN202120454574.1U
Authority: CN
Inventors: 陈亮
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Zhejiang Maqi Sewing Machine Co Ltd
Priority date: 2021-03-03
Filing date: 2021-03-03
Publication date: 2021-10-26
Anticipated expiration: 2031-03-03

Abstract

The utility model discloses a middle presser foot mechanism of a sewing machine, which comprises a cam, wherein the cam is fixed on an upper shaft through a first screw; the presser foot lifting pull rod and the connecting rod swinging seat are arranged on the machine shell through a first swinging shaft; the pressure foot lifting pull rod is fixed on the connecting rod swinging seat through a first hinge screw; the roller is fixed on the connecting rod swing seat through a cam roller screw; the pressure foot lifting pull rod and the lifting plate are fixed with the nut through a second hinge screw; the lifting plate is arranged on the machine shell through a second swinging shaft and a tight ring; the pressing rod sleeve is arranged on the shell, the pressing rod is arranged in the pressing rod sleeve, and the middle pressing foot is fixed on the pressing rod through a third screw; the pressure foot lifting block is fixed on the pressing rod through a second screw; the spring guide rod is arranged on the pressing rod through a spring, and the spring guide rod is arranged on the shell through a pressure regulating screw. The utility model discloses the structure is more stable, effectively solves the inhomogeneous problem of effort to well presser foot promotes stably, and sewing effect is good.

Description

Middle presser foot mechanism of sewing machine

Technical Field

The utility model relates to a well presser foot mechanism of sewing machine.

Background

The middle presser foot plays a key role in the work of the sewing machine, particularly in the work of a small pattern sewing machine, the roller of the common sewing machine is matched with the outer side of the cam through the bearing, if the cam and the roller do not contact or the roller is abraded, the phenomenon of slipping occurs, the acting force is uneven, the middle presser foot is not lifted stably, and the sewing effect is not ideal.

Disclosure of Invention

The utility model aims at providing a well presser foot mechanism of sewing machine.

In order to achieve the purpose of the utility model, the utility model provides a middle presser foot mechanism of a sewing machine, which comprises a cam, wherein the cam is fixed on an upper shaft through a first screw; the presser foot lifting pull rod and the connecting rod swinging seat are arranged on the machine shell through a first swinging shaft; the pressure foot lifting pull rod is fixed on the connecting rod swinging seat through a first hinge screw; the roller is fixed on the connecting rod swing seat through a cam roller screw; the pressure foot lifting pull rod and the lifting plate are fixed with the nut through a second hinge screw; the lifting plate is arranged on the machine shell through a second swinging shaft and a tight ring; the pressing rod sleeve is arranged on the shell, the pressing rod is arranged in the pressing rod sleeve, and the middle pressing foot is fixed on the pressing rod through a third screw; the pressure foot lifting block is fixed on the pressing rod through a second screw; the spring guide rod is arranged on the pressing rod through a spring, and the spring guide rod is arranged on the shell through a pressure regulating screw.

Further, the roller is located at the center of the groove of the cam, and the lifting plate is abutted below the presser foot lifting block.

Further, the upper shaft rotates to drive the cam to rotate, the cam drives the connecting rod swing seat to move left and right, the connecting rod swing seat drives the lifting plate to move up and down, and the lifting plate drives the middle presser foot to move up and down; when the lifting plate moves downwards, the middle presser foot moves downwards under the acting force of the spring.

Further, the surface of the roller is plated with black diamond.

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

the novel structure that the two sides of the cam are matched is adopted, the roller is arranged at the center of the cam groove, and the two sides of the cam groove drive the roller to move together when the cam moves. The bilateral complex structure of gyro wheel in the cam even appear skidding on one side, the another side also can contact, and is more stable for unilateral cooperation structure, effectively solves the inhomogeneous problem of effort to well presser foot promotes stably, and sewing effect is good. The roller is more wear-resistant after being coated with black diamond on the surface, and the service life is prolonged

Drawings

Fig. 1 is an exploded view of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an embodiment of the present invention.

In the figure, an upper shaft 1, a cam 2, a first screw 3, a first hinge screw 4, a first swing shaft 5, a cam roller screw 6, a roller 7, a connecting rod swing seat 8, a pressure foot lifting pull rod 9, a nut 10, a second swing shaft 11, a lifting plate 12, a clamping ring 13, a second hinge screw 14, a pressure regulating screw 15, a spring guide rod 16, a spring 17, a pressure foot lifting block 18, a second screw 19, a pressure rod sleeve 20, a pressure rod 21, a third screw 22 and a middle pressure foot 23.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, an embodiment of the middle presser foot mechanism of the sewing machine of the present invention comprises a cam 2, wherein the cam 2 is fixed on an upper shaft 1 by a first screw 3; the presser foot lifting pull rod 9 and the connecting rod swinging seat 8 are arranged on the machine shell through the first swinging shaft 5; the pressure foot lifting pull rod 9 is fixed on the connecting rod swinging seat 8 through a first hinge screw 4; the roller 7 is fixed on the connecting rod swing seat 8 through a cam roller screw; the pressure raising and pressing foot pull rod 9 and the lifting plate 12 are fixed with the nut 10 through a second hinge screw 14; the lifting plate 12 is mounted on the housing by the second swing shaft 11 and the clinch ring 13; the pressing rod sleeve 20 is arranged on the machine shell, the pressing rod 21 is arranged in the pressing rod sleeve 20, and the middle pressing foot 23 is fixed on the pressing rod 21 through a third screw 22; the presser foot lifting block 18 is fixed on the pressing rod 21 through a second screw 19; the spring guide rod 16 is arranged on the pressing rod 21 through a spring 17, and the spring guide rod 16 is arranged on the machine shell through a pressure regulating screw 15. During operation, main shaft 1 drives cam 2 motion, and cam 2 drives connecting rod swinging seat 8 side-to-side motion through gyro wheel 7, drives lifting plate 12 up-and-down motion again, and lifting plate 12 drives well presser foot 23 up-and-down motion again, can not only avoid the phenomenon of skipping, and meanwhile, well presser foot 23 also plays the material effect of pressing. The roller 7 is arranged at the center of the groove of the cam 2, and when the cam 2 moves, the two sides of the groove drive the roller 7 to move together. The bilateral complex structure of gyro wheel 7 in cam 2 even appear skidding on one side, the another side also can contact, and is more stable for unilateral complex structure, effectively solves the inhomogeneous problem of effort to well presser foot 23 promotes stably, and sewing effect is good.

In one embodiment, the roller 7 is centered in the slot of the cam 2 and the lift plate 12 abuts below the presser foot lift block 18.

In one embodiment, the upper shaft 1 rotates to drive the cam 2 to rotate, the cam 2 drives the connecting rod swing seat 8 to move left and right, the connecting rod swing seat 8 drives the lifting plate 12 to move up and down, and the lifting plate 12 drives the middle presser foot 23 to move up and down; when the lift plate 12 moves downward, the middle presser foot 23 moves downward under the urging force of the spring 17. When sewing, the middle presser foot 23 is arranged at the lower end of the machine needle, and the middle presser foot 23 synchronously moves downwards along with the machine needle when the machine needle moves downwards, so that the phenomenon of needle skipping can be avoided, and the function of pressing is also achieved.

In one embodiment, the surface of the roller 7 is coated with black diamond, so that the roller is more wear-resistant and has a longer service life.

The control software involved in the utility model adopts the prior art.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. 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. The middle presser foot mechanism of the sewing machine is characterized by comprising a cam (2), wherein the cam (2) is fixed on an upper shaft (1) through a first screw (3); a presser foot lifting pull rod (9) and a connecting rod swinging seat (8) are arranged on the machine shell through a first swinging shaft (5); a presser foot lifting pull rod (9) is fixed on the connecting rod swinging seat (8) through a first hinge screw (4); the roller (7) is fixed on the connecting rod swing seat (8) through a cam roller screw; the pressure raising and pressing foot pull rod (9) and the lifting plate (12) are fixed with the nut (10) through a second hinge screw (14); the lifting plate (12) is arranged on the machine shell through a second swinging shaft (11) and a tight ring (13); a pressing rod sleeve (20) is arranged on the shell, a pressing rod (21) is arranged in the pressing rod sleeve (20), and a middle pressing foot (23) is fixed on the pressing rod (21) through a third screw (22); the presser foot lifting block (18) is fixed on the pressing rod (21) through a second screw (19); the spring guide rod (16) is arranged on the pressing rod (21) through a spring (17), and the spring guide rod (16) is arranged on the shell through a pressure regulating screw (15).

2. A middle presser mechanism of a sewing machine according to claim 1, wherein said roller (7) is located at the center of a groove of said cam (2), and said lifting plate (12) abuts below said presser lift block (18).

3. The middle presser mechanism of sewing machine as claimed in claim 1, wherein the upper shaft (1) rotates to drive the cam (2) to rotate, the cam (2) drives the connecting rod swing seat (8) to move left and right, the connecting rod swing seat (8) drives the lifting plate (12) to move up and down, and the lifting plate (12) drives the middle presser (23) to move up and down; when the lifting plate (12) moves downwards, the middle presser foot (23) moves downwards under the action of the spring (17).

4. The middle presser foot mechanism of sewing machine according to claim 1, wherein the surface of said roller (7) is plated with black diamond.