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Sewing machine and automatic thread trimming and presser foot lifting mechanism thereof

A thread trimming mechanism and presser foot lifting technology are applied in the thread cutting mechanism, cloth pressing mechanism, sewing machine components and other directions in a sewing machine, which can solve the problems of high manufacturing cost, large space occupation, and many parts, and achieve low manufacturing cost. , The effect of taking up less space and reducing the number of

Pending Publication Date: 2019-03-12
ZHEJIANG DOSO SEWING MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since the automatic thread trimming mechanism and the automatic presser foot lifting mechanism of the sewing machine are respectively driven by their corresponding drive mechanisms to trim the thread and lift the presser foot, two drive mechanisms are required to drive the work, which has a single function and many parts. Complex structure, high manufacturing cost and large space occupation

Method used

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  • Sewing machine and automatic thread trimming and presser foot lifting mechanism thereof
  • Sewing machine and automatic thread trimming and presser foot lifting mechanism thereof
  • Sewing machine and automatic thread trimming and presser foot lifting mechanism thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] One of the objects of the present invention is to provide an automatic thread trimming and presser foot lifting mechanism for a sewing machine, which includes a thread trimming mechanism and a presser foot lifting mechanism arranged on the casing, and the thread trimming mechanism is rotatably connected to the casing One end of the thread trimming drive shaft 1 is connected, and the thread trimming drive shaft 1 is rotated to drive the thread trimming mechanism to perform the thread trimming action. The presser foot lifting mechanism is connected to one end of the presser foot rear lever 2 hinged on the casing. The presser foot rear lever 2 drives the presser foot lifting mechanism to perform the presser foot lifting action. The casing is provided with a driving motor 3, and the output shaft of the driving motor 3 is provided with a driving bevel gear 4, and a part of the driving bevel gear 4 The outer peripheral surface is provided with teeth 5, and another part of the ...

Embodiment 2

[0037] The structure of this embodiment is basically the same as that of Embodiment 1, the main difference is that: the transmission assembly includes a cam 12 arranged on the output shaft of the drive motor 3, and the protruding part of the cam 12 is in the same position as the smooth surface 6 of the drive bevel gear 4. Correspondingly, and the cam 12, the drive bevel gear 4 and the output shaft of the drive motor 3 rotate synchronously. The other end of the presser foot is against the corresponding end of the lever 2 after lifting the presser foot. During the thread trimming process, the drive motor 3 drives the thread trimming drive shaft 1 to rotate through the meshing of the teeth 5 of the driving bevel gear 4 with the thread trimming bevel gear 7, and one end of the push rod 13 abuts against the base circle of the cam 12; During the presser foot process, the driving motor 3 pushes the push rod 13 to move through the protruding part of the cam 12, and then drives the rea...

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Abstract

The invention belongs to the technical field of sewing machines, and particularly relates to a sewing machine and an automatic thread trimming and presser foot lifting mechanism thereof. The automaticthread trimming and presser foot lifting mechanism comprises a thread trimming mechanism body and a presser foot lifting mechanism body; the thread trimming mechanism body is connected with one end of a thread trimming driving shaft, and the presser foot lifting mechanism body is connected with one end of a presser foot lifting rear lever; a housing is provided with a driving motor, an output shaft of the driving motor is provided with a driving bevel gear, the outer peripheral surface of one part of the driving bevel gear is provided with gear teeth, and the outer peripheral surface of the other part of the driving bevel gear is a smooth surface; the other end of the thread trimming driving shaft is provided with a thread trimming bevel gear, the other end of the presser foot lifting rear lever is in transmission connection with the output shaft of the driving motor through a transmission assembly, and the driving motor is electrically connected with a controller. According to the sewing machine and the automatic thread trimming and presser foot lifting mechanism thereof, the thread trimming mechanism body and the presser foot lifting mechanism body can be separately driven by one driving motor to carry out the operation of thread trimming and presser foot lifting, the quantity of parts is effectively reduced accordingly, and therefore the sewing machine is more compact and simpler in structure, low in manufacturing cost and small in occupied space.

Description

Technical field: [0001] The invention belongs to the technical field of sewing machines, in particular to a sewing machine and its automatic thread trimming and presser foot lifting mechanism. Background technique: [0002] With the continuous improvement of the degree of automation of sewing machines, sewing machines generally have an automatic thread trimming mechanism and an automatic presser foot lifting mechanism. Above the plate, when trimming the thread, the thread trimming mechanism is driven by the motor to realize the thread trimming action; when the presser foot is lifted, the automatic presser foot lifting mechanism is driven by the electromagnet or the cylinder to lift and lower the presser foot. Among them, the automatic thread trimming mechanism of the sewing machine generally occurs when the presser foot is not lifted and is in a pressed state at the end of sewing, so the thread trimming mechanism and the action of the presser foot mechanism are often linked ...

Claims

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Application Information

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IPC IPC(8): D05B65/00D05B29/02D05B69/02D05B69/10
CPCD05B29/02D05B65/00D05B69/02D05B69/10Y02W30/66
Inventor 叶仙冲阮卜根
Owner ZHEJIANG DOSO SEWING MACHINE
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