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Presser foot lifting and trimming driving structure of sewing machine and control method thereof

A driving structure and presser foot lifting technology, which is applied in the field of sewing machines, can solve the problems that the control of the cam structure is not flexible and fast, the thread trimming mechanism is not suitable for long-distance transmission, and the structure has poor adaptability, so as to reduce the driving source and the number of parts, Simple assembly and low overall noise

Active Publication Date: 2021-02-23
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned patent documents, a stepping motor is used as the driving source to realize the functions of thread trimming and presser foot lifting, but the thread trimming mechanism is not suitable for long-distance transmission, and the structural adaptability is poor, and the control of the cam structure is not flexible and fast enough, and the efficiency is low. The control is not precise enough, and it is easy to cause failure

Method used

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  • Presser foot lifting and trimming driving structure of sewing machine and control method thereof
  • Presser foot lifting and trimming driving structure of sewing machine and control method thereof
  • Presser foot lifting and trimming driving structure of sewing machine and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as figure 1 , figure 2 with image 3 As shown, the sewing machine includes a casing 12, a thread trimmer assembly 3, a presser foot arm 2, and a presser foot 1 arranged at the end of the presser foot arm 2. The thread trimmer assembly 3 includes a moving knife 31, a fixed knife 32, and drives the moving knife 31 toward The thread trimming pin 33 that fixed knife 32 swings, this drive structure comprises stepper motor 4, can swing presser foot lifter crank 5, presser foot lifter lever 6, vertically arranges and can move up and down push rod 7 and thread trimmer connection. Rod 8; The casing 12 is fixedly provided with a mounting plate 13, the stepper motor 4 is fixedly mounted on the mounting plate 13, the output shaft of the stepping motor 4 is fixedly provided with a drive cam 9, and the crank 5 for lifting the presser foot is provided with a The roller 10 that the outer contour of the drive cam 9 contacts, the presser foot lifter lever 6 is connected with the ...

Embodiment 2

[0044] combine Figure 4 with Figure 5 As shown, this embodiment provides a control method for the sewing machine presser foot lifter and thread trimmer driving. The sewing machine includes the presser foot lifter and thread trimmer drive structure in Embodiment 1, and also includes a controller and a control panel. It is characterized in that, The control method includes the following steps:

[0045] a. Setting parameters: pre-set the rotation angle parameters of the stepping motor 4 through the controller or the control panel;

[0046] b. Presser foot lift action: when the presser foot needs to be lifted, send the presser foot lift signal to the controller, the stepper motor 4 rotates clockwise at a preset angle, and the drive cam 9 on the output shaft of the stepper motor 4 drives the lifter The foot crank 5 moves, thereby driving the presser foot lever 6 and the presser arm 2 to move, and finally drives the presser foot 1 on the presser arm 2 to lift. 18 and presser fo...

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Abstract

The invention provides a presser foot lifting and trimming driving structure of a sewing machine and a control method thereof, and belongs to the technical field of sewing machines. The technical problems that an existing presser foot lifting and trimming driving structure is not convenient and accurate enough to control and the like are solved. The sewing machine comprises a thread trimming assembly, a presser foot arm and a presser foot. The driving structure comprises a stepping motor, a presser foot lifting crank, a presser foot lifting lever, a vertically-arranged pushing rod and a threadtrimming connecting rod. A driving cam is fixedly arranged on an output shaft of the stepping motor; a roller I making contact with the outer contour of the driving cam is arranged on the presser foot lifting crank; the presser foot lifting lever is connected with the presser foot lifting crank; the presser foot lifting lever can drive a presser foot at the end of the presser foot arm to be lifted; a roller II matched with the driving cam is arranged on one side of the pushing rod; and the thread trimming connecting rod is connected to the upper end of the pushing rod and can drive a movablecutter and a fixed cutter in the thread trimming assembly to do shearing motion. According to the presser foot lifting and trimming driving structure of the sewing machine and the control method thereof provided by the invention, the driving structure is accurate and reliable in control and convenient to adjust.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and relates to a sewing machine presser foot lifting and thread trimming driving structure and a control method thereof. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. During the sewing process, the sewing machine will use the functions of automatic thread trimmer and automatic presser foot lift; currently, sewing machines on the market generally use two electromagnets with different powers to drive the functions of thread trimmer and presser foot lift respectively, and the electric control part mainly relies on induction. The device signal is used to output a voltage signal to the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B29/02D05B65/00D05B69/02D05B69/10D05B69/30D05B73/02
CPCD05B29/02D05B65/00D05B69/02D05B69/10D05B69/30D05B73/02D05D2305/32
Inventor 符志诚刘袁徐永明赵林蔚
Owner JACK SEWING MASCH CO LTD
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