CN112553792A

CN112553792A - Presser foot mechanism of sewing machine

Info

Publication number: CN112553792A
Application number: CN201911085561.5A
Authority: CN
Inventors: 陈文强; 刘玉
Original assignee: Xuzhou Li Da Sewing Devices Manufacturing Co ltd
Current assignee: Xuzhou Li Da Sewing Devices Manufacturing Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2021-03-26

Abstract

The invention relates to the technical field of sewing machines, in particular to a presser foot mechanism of a sewing machine, which comprises a stepping motor, wherein an output shaft of the stepping motor is connected with a screw rod through a coupler, the bottom of the screw rod is connected with a pushing mechanism, the pushing mechanism comprises a push rod, the push rod extends into a press rod sleeve, the bottom of the push rod is fixedly connected with a piston, the bottom of the piston is fixedly connected with an electric telescopic rod, the bottom of the electric telescopic rod is provided with a connecting rod, the connecting rod is connected with the presser foot mechanism, the presser foot mechanism comprises a presser foot, a distance sensor is embedded in the bottom of the presser foot, the top of the presser foot is provided with a pulley, the top of the presser foot is provided with a presser foot arm, the top of the presser.

Description

Presser foot mechanism of sewing machine

Technical Field

The invention relates to the technical field of sewing machines, in particular to a presser foot mechanism of a sewing machine.

Background

The sewing machine presser foot is an indispensable spare part in sewing machine's feeding mechanism, the sewing machine presser foot of various different forms plays very important effect in process of production, current lift presser foot structure electro-magnet external and size is great, influence the whole aesthetic property of machine, be connected through more complicated mechanism between electro-magnet and lifting teeth axle, therefore, the transmission efficiency of whole mechanism is not high, and the power of required electro-magnet is great and overall structure cost is higher, and the presser foot makes up-and-down motion in through mechanical cam drive, this kind of mechanism is relatively complicated, and the adjustment is more troublesome, the height position is difficult to control, produce the noise easily because of the collision between the part at flexible in-process, and the presser foot probably weares and teares the cloth when removing, in view of the above, we provide a sewing machine presser foot mechanism.

Disclosure of Invention

The invention aims to provide a presser foot mechanism of a sewing machine, which solves the problems of complexity, troublesome adjustment, difficult height control, high noise and easy abrasion of cloth of the common presser foot mechanism in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a sewing machine presser foot mechanism, includes step motor, step motor's output shaft passes through the coupling joint screw rod, pushing mechanism is connected to the screw rod bottom, pushing mechanism includes the push rod, the push rod stretches into the presser bar cover, push rod bottom fixed connection piston, piston bottom fixed connection electric telescopic handle, the electric telescopic handle bottom is provided with the connecting rod, the connecting rod is connected presser foot mechanism, presser foot mechanism includes the presser foot, the presser foot bottom inlays and is equipped with apart from the inductor, the presser foot top is provided with the pulley, the presser foot top is provided with the presser foot arm, presser foot arm top is provided with the connecting block, the connecting block with the connecting rod cooperation of pegging graft.

Preferably, the piston is slidably arranged in the inner cavity of the pressure rod sleeve, and the telescopic end of the electric telescopic rod extends out of the bottom of the pressure rod sleeve.

Preferably, the stepping motor is arranged at the top of the machine head, the output shaft extends into an inner cavity at the top of the machine head, and the lower end of the electric telescopic rod extends out of the bottom of the machine head.

Preferably, a controller is arranged in the machine head, and the controller of the machine head is electrically connected with the stepping motor, the electric telescopic rod and the distance sensor.

Preferably, the pulley is slidably disposed on the top of the presser foot, and the pulley and the bottom of the presser foot are in the same horizontal plane.

Compared with the prior art, the invention has the beneficial effects that:

1. this sewing machine presser foot mechanism is through setting up to stretch out and draw back from top to bottom with step motor drive presser foot, simple structure, and is with low costs, avoids using the complicated mechanism of electro-magnet to influence the machine pleasing to the eye.

2. This sewing machine presser foot mechanism through setting up electric telescopic handle and distance inductor, can the transfer signal to the controller of aircraft nose in to control electric telescopic handle is flexible to find the distance of suitable presser foot to the cloth, avoids the too big fragile cloth of pressure.

3. According to the presser foot mechanism of the sewing machine, the pulley and the presser foot are arranged on the same horizontal plane, and the pulley rolls on the cloth, so that the condition that the presser foot easily scratches the cloth can be effectively prevented.

4. This sewing machine presser foot mechanism slides in the pressure bar cover through setting up by the piston for step motor drives the push rod during operation and reciprocates, and the condition that direct friction noise is big between the machine is avoided by piston promotion presser foot reciprocates.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is a side cross-sectional view of the overall structure of the present invention;

FIG. 4 is an exploded view of the pushing mechanism of the present invention;

fig. 5 is an assembly view of the overall structure of the present invention.

In the figure: 1. a stepping motor; 11. an output shaft; 2. a coupling; 3. a screw; 31. a screw sleeve; 4. a pushing mechanism; 40. a pressure rod sleeve; 41. a push rod; 42. a piston; 43. an electric telescopic rod; 44. a connecting rod; 5. a presser foot mechanism; 51. a presser foot; 52. a pulley; 53. a presser foot arm; 54. a distance sensor; 55. connecting blocks; 6. a handpiece.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "centerline", "longitudinal", "lateral", "length", "width", "thickness", "depth", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be taken as limiting the invention, also in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Example 1

A presser foot mechanism of sewing machine, in order to solve the problem that the ordinary presser foot mechanism is complicated, the adjustment is troublesome, the height is not easy to control, the noise is large and the cloth is easy to wear, as a preferred embodiment, as shown in figure 1, figure 2, figure 3, figure 4 and figure 5, including stepping motor 1, the output shaft 11 of stepping motor 1 connects with screw 3 through shaft coupling 2, the bottom of screw 3 connects with pushing mechanism 4, pushing mechanism 4 includes push rod 41, push rod 41 stretches into the presser bar sleeve 40, the bottom of push rod 41 connects with piston 42 fixedly, the bottom of piston 42 connects with electric telescopic rod 43, the bottom of electric telescopic rod 43 is provided with connecting rod 44, connecting rod 44 connects with presser foot mechanism 5, presser foot mechanism 5 includes presser foot 51, the bottom of presser foot 51 is embedded with distance inductor 54, the top of presser foot 51 is provided with pulley 52, the top of presser foot 51 is provided with presser foot pressing arm 53, the connecting block 55 is inserted and matched with the connecting rod 44.

In this example, the piston 42 is slidably disposed in the inner cavity of the pressure bar sleeve 40, the telescopic end of the electric telescopic rod 43 extends out of the bottom of the pressure bar sleeve 40, and the piston 42 is slidably disposed in the pressure bar sleeve 40, so that the step motor 1 drives the push rod 41 to move up and down during operation, and the piston 42 pushes the pressure foot to move up and down, thereby avoiding the situation of high direct friction noise between machines.

Further, step motor 1 sets up at 6 tops of aircraft nose, and output shaft 11 stretches into 6 top inner chambers of aircraft nose, and electric telescopic handle 43 lower extreme stretches out 6 bottoms of aircraft nose, and it is flexible from top to bottom to drive presser foot 51 with step motor 1 through setting up, and simple structure is with low costs, avoids using the complicated mechanism of electro-magnet to influence the machine pleasing to the eye.

Specifically, a controller is arranged in the machine head 6, the controller of the machine head 6 is electrically connected with the stepping motor 1, the electric telescopic rod 43 and the distance sensor 54, wherein the electric telescopic rod 43 is an YNT-01 micro electric telescopic rod, and the stepping motor 1 is a VR type stepping motor.

In addition, the pulley 52 is slidably arranged at the top of the presser foot 51, the pulley 52 and the bottom of the presser foot 51 are in the same horizontal plane, and the pulley 52 rolls on the cloth, so that the situation that the presser foot 51 easily scratches the cloth can be effectively prevented.

When the presser foot mechanism of the sewing machine is used, the output shaft 11 of the stepping motor 1 works firstly, so that the screw rod 3 is driven to move up and down, the push rod 41 of the push mechanism 4 pushes the piston 42 to move up and down, the presser foot mechanism 5 moves up and down through the output end of the electric telescopic rod 43, meanwhile, the distance sensor 54 embedded in the bottom plate of the presser foot 51 senses the most appropriate distance from the presser foot 51 to the cloth, signals are transmitted to the controller of the machine head 6, so that the length of the electric telescopic rod 43 in extension and retraction is controlled, sewing is facilitated, the problem of high noise caused by direct pushing between mechanisms can be effectively avoided through the fact that the piston 42 slides in the pressure rod sleeve 40, and the pulley 52 and the presser foot 51 are in the same horizontal plane, when the cloth is pulled, the pulley 52 can roll on the cloth, and.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a sewing machine presser foot mechanism, includes step motor (1), its characterized in that: an output shaft (11) of the stepping motor (1) is connected with a screw rod (3) through a coupler (2), the bottom of the screw rod (3) is connected with a pushing mechanism (4), the pushing mechanism (4) comprises a push rod (41), the push rod (41) extends into a press rod sleeve (40), the bottom of the push rod (41) is fixedly connected with a piston (42), the bottom of the piston (42) is fixedly connected with an electric telescopic rod (43), the bottom of the electric telescopic rod (43) is provided with a connecting rod (44), the connecting rod (44) is connected with the press foot mechanism (5), the press foot mechanism (5) comprises a press foot (51), a distance sensor (54) is embedded in the bottom of the press foot (51), the top of the press foot (51) is provided with a pulley (52), the top of the press foot (51) is provided with a press foot arm (53), and the top of the, the connecting block (55) is in plug fit with the connecting rod (44).

2. The presser foot mechanism of a sewing machine as claimed in claim 1, wherein: the piston (42) is arranged in the inner cavity of the pressure rod sleeve (40) in a sliding mode, and the telescopic end of the electric telescopic rod (43) extends out of the bottom of the pressure rod sleeve (40).

3. The presser foot mechanism of a sewing machine as claimed in claim 1, wherein: the stepping motor (1) is arranged at the top of the machine head (6), the output shaft (11) extends into an inner cavity at the top of the machine head (6), and the lower end of the electric telescopic rod (43) extends out of the bottom of the machine head (6).

4. A presser foot mechanism for sewing machines as defined in claim 3, wherein: a controller is arranged in the machine head (6), and the controller of the machine head (6) is electrically connected with the stepping motor (1), the electric telescopic rod (43) and the distance sensor (54).

5. The presser foot mechanism of a sewing machine as claimed in claim 1, wherein: the pulley (52) is arranged at the top of the presser foot (51) in a sliding mode, and the pulley (52) and the bottom of the presser foot (51) are on the same horizontal plane.