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sewing machine

A technology of sewing machine and thread trimming mechanism, which is applied in the field of fabric sewing, which can solve the problems of long action cycle, slow response speed of presser foot lifting, unfavorable service life of motor, etc., and achieve the effect of improving response and shortening working cycle time

Active Publication Date: 2022-01-28
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the structure where a stepping motor simultaneously drives the thread trimming mechanism and the presser foot lifting mechanism to realize the thread trimming function and the presser foot lifting function respectively, when performing the action of lifting the presser foot after thread trimming, the motor needs to rotate from the initial zero position to the maximum At the moment of thread trimming, drive the thread trimming mechanism to complete the thread trimming action, then reverse and reset to the initial zero position to reset the thread trimming mechanism, and then continue to reversely drive the presser foot lifting mechanism to perform the presser foot lifting action. Sudden stop and start of steering will result in a long cycle of action and slow response of presser foot lifter
In the above two structures, although the time period can be shortened by increasing the motor speed, this will increase the load on the motor, which is not conducive to the service life of the motor

Method used

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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Embodiment Construction

[0049] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, not to limit the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying Describes, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate in a specific orientation, and therefore should not be construed as limiting the invention...

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Abstract

The invention relates to the technical field of fabric sewing, in particular to a sewing machine, comprising: a motor, a thread trimming cam, a thread trimming drive crank and a thread trimming mechanism, the motor drives the thread trimming cam to rotate forward or reverse, and the thread trimming cam has a thread trimming drive Contoured surface and the first reset driving contour surface, one end of the thread trimmer drive crank is provided with a thread trimming roller that matches the thread trimming drive contour surface and a first reset pin that matches the first reset drive contour surface, and the other end is connected to the thread trimmer Mechanisms are connected; when the thread trimming cam rotates positively, the thread trimming driving profile surface can act on the thread trimming roller to drive the thread trimming drive crank to drive the thread trimming mechanism to perform the thread trimming action, and make the first reset driving profile surface in the thread trimming action After completion, it acts on the first reset pin to drive the thread trimmer to drive the crank to move in reverse to drive the thread trimmer mechanism to perform the reset action. It can realize the thread trimming action and the reset action of the thread trimming mechanism after the thread trimming during the whole rotation of the motor, without the need for emergency stop and emergency start of the motor.

Description

technical field [0001] The invention relates to the technical field of cloth sewing, in particular to a sewing machine. Background technique [0002] In the existing sewing machine, the thread trimming mechanism is driven by a stepping motor to perform the thread trimming action, and its drive control logic sequence is thread trimming, and then reverse reset. In the process of completing the thread trimming action, when the motor rotates from the initial zero position to the maximum thread trimming moment, after driving the thread trimming mechanism to complete the thread trimming action, it needs to be reversed and reset to the initial zero position to reset the thread trimming mechanism. During the execution of such control logic, the motor needs to be stopped and started quickly to realize the steering. The motor needs to be started and stopped twice in one cycle, and there is a problem of slow response to the thread trimming action. For the structure where a stepping mo...

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 Patents(China)
IPC IPC(8): D05B65/00D05B29/02D05B69/10
CPCD05B65/00D05B29/02D05B69/10
Inventor 柯祥林祝书伟郑吉位延辉
Owner JACK SEWING MASCH CO LTD
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