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Driving device for automatic thread trimming and automatic presser foot lifting

A driving device and presser foot lifting technology, which is applied in the field of sewing machines, can solve problems such as loud noises and shaking, affecting the stable operation of sewing machines, etc., and achieve the effects of reducing shaking and noise, reliable positioning, and reducing structures

Active Publication Date: 2016-10-12
ZHEJIANG DUMA SEWING MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the speed of the electromagnet is very different when it is pulled in and when it is bounced off, when the hook thread rod or the presser foot rod moves back and forth, there will often be a loud sound and shaking, which may affect the stable operation of the sewing machine

Method used

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  • Driving device for automatic thread trimming and automatic presser foot lifting
  • Driving device for automatic thread trimming and automatic presser foot lifting
  • Driving device for automatic thread trimming and automatic presser foot lifting

Examples

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing with specific embodiment:

[0029] see Figure 1 to Figure 6 As shown, a driving device for automatic thread trimmer and automatic presser foot lifter includes a presser foot lifter drive rod 2, a thread trimmer drive rod 3, a stepper motor 4, a cam body 5, a presser foot lifter connecting rod 8 and a thread trimmer connection Rod 9, the cam body 5 is arranged on the output shaft of the stepping motor 4; the cam body 5 is provided with the presser foot driving cam surface 6 and the thread trimming driving cam surface; the presser foot connecting rod 8 One end is hinged on the sewing machine housing 1, the other end of the presser foot lifting connecting rod 8 is hinged on one end of the presser foot lifting transmission rod 2, the first driven pin 13 is also arranged on the presser foot connecting rod 8, the first driven pin The sub 13 slides along the presser foot driving ca...

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Abstract

The invention belongs to the technical field of sewing machines, and particularly discloses a driving device for automatic thread trimming and automatic presser foot lifting. The driving device is simple in structure and capable of guaranteeing stable operation of a sewing machine. The driving device comprises a presser foot lifting transmission rod, a thread trimming transmission rod, a stepping motor, a cam body arranged on the stepping motor, a pressure foot lifting connecting rod and a thread trimming connecting rod. The cam body is provided with a pressure foot lifting driving cam surface and a thread trimming driving cam surface, both of which comprise a base circle surface and a lift curved surface. The other end of the pressure foot lifting connecting rod is hinged to one end of the pressure foot lifting transmission rod, and the pressure foot lifting connecting rod is provided with a first driven pin. The thread trimming transmission rod is hinged to the other end of the thread trimming connecting rod, and the thread trimming connecting rod is provided with a second driven pin. When the stepping motor drives the cam body to rotate clockwise by a certain angle, one driven pin enters the lift curved surfaces from the base circle surfaces, and the other driven pin slides on the base circle surfaces; when the stepping motor drives the cam body to rotate anticlockwise, one driven pin slides on the base circle surfaces, and the other driven pin enters the lift curved surfaces from the base circle surfaces.

Description

technical field [0001] The invention belongs to the technical field of sewing machines, and specifically refers to a driving device for automatic thread trimmer and automatic presser foot lifter. Background technique [0002] At present, the thread hook lever used for thread trimming and the presser foot lever used for lifting the presser foot on the sewing machine are respectively controlled by two electromagnets. When the presser foot needs to be lifted, another electromagnet controls the presser foot pull bar to move back and forth. Because the speed of the electromagnet is very different when it is engaged and when it is bounced off, when the thread hook lever or the presser foot lever moves back and forth, there will often be loud noises and shaking, which may affect the stable operation of the sewing machine. Contents of the invention [0003] In order to overcome the defects in the prior art, the object of the present invention is to provide a driving device for au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B29/02D05B65/00D05B69/10
CPCD05B29/02D05B65/00D05B69/10
Inventor 阮孟定
Owner ZHEJIANG DUMA SEWING MACHINE
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