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A device for adjusting the alternate amount of presser feet on a sewing machine and its control method

A sewing machine and presser foot technology, which is applied in the direction of sewing machine components, sewing equipment, cloth pressing mechanism, etc., can solve the problems of poor adjustability of presser foot alternating amount, insufficient application range, and inconvenient use, etc., and achieves wide application range and reduced Effects of noise and parts wear and improvement of productivity

Active Publication Date: 2021-08-06
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This solution must have an air source, and small and medium-sized customers generally do not have an air pump, which makes the application range of this solution not wide enough and not easy to use
At the same time, since the stroke of the cylinder cannot be adjusted freely after installation, the alternating amount of the presser foot can only be adjusted at two limit positions, and the thickness of the user's sewing material step will vary due to different sewing materials and different processes, which makes the presser foot The adjustability of alternation is poor

Method used

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  • A device for adjusting the alternate amount of presser feet on a sewing machine and its control method
  • A device for adjusting the alternate amount of presser feet on a sewing machine and its control method
  • A device for adjusting the alternate amount of presser feet on a sewing machine and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 , figure 2 , image 3 and Figure 4 As shown, the sewing machine includes an upper shaft 1, a presser foot lifting shaft 2 and a presser foot rod 3, the upper shaft 1 is provided with an eccentric wheel 4, and the eccentric wheel 4 is connected with the presser foot lifting shaft 2 through an eccentric connecting rod 5, and the presser foot The lifting shaft 2 is connected with the presser foot bar 3 through the presser foot lift crank 6 and can drive the presser foot bar 3 to reciprocate up and down. The device includes a stepper motor 7 and an adjustment crank 8. The stepper motor 7 drives the swing crank 10 that swings down. The swing crank 10 is connected with an adjustment link 9 that can adjust the length. One end of the adjustment link 9 is hinged with the end of the swing crank 10. The other end of the adjustment link 9 The limit screw 11 is rotatably connected; one end of the eccentric connecting rod 5 is hinged with the limit screw 11; Wa...

Embodiment 2

[0049] Such as Figure 5 As shown, the present embodiment is roughly the same as the first embodiment, the difference is that in the present embodiment, the output shaft of the stepper motor 7 is fixedly provided with a helical gear 15, and the device also includes a drive shaft 17, the drive shaft 17 The axial direction is perpendicular to the axial direction of the output shaft of the stepping motor 7, the transmission shaft 17 is fixedly provided with a helical gear 2 16, the helical gear 15 is meshed with the helical gear 2 16, and one end of the swing crank 10 is fixedly connected to the transmission shaft The end of 17; The end of adjusting link 9 is connected with the other end of swing crank 10. This facilitates the installation and layout of the entire device, and makes the structure compact and the transmission stable and reliable.

Embodiment 3

[0051] Such as Figure 6 As shown, this embodiment is substantially the same as Embodiment 1, the difference is that the adjusting link 9 in this embodiment includes two strip plates 93, and one end of the strip plate 93 has a The other end of the bar-shaped hole 93a has a mounting hole 93b, and the ends of the two bar-shaped plates 93 with the bar-shaped hole 93a fit together and are connected by adjusting bolts 94 inserted in the bar-shaped hole 93a.

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Abstract

The invention provides a device for adjusting the alternate amount of presser feet on a sewing machine, which belongs to the technical field of sewing equipment. The utility model solves technical problems such as inconvenient adjustment of the alternating amount of the presser foot of the existing sewing machine. The device includes a stepping motor and an adjusting crank. The output shaft of the stepping motor is connected with a swinging crank that can swing under the drive of the stepping motor. The swinging crank is connected with an adjusting link that can adjust the length. One end of the adjusting link is connected to The ends of the oscillating crank are hinged, the other end of the adjusting connecting rod rotates and connects with the limit screw, and one end of the eccentric connecting rod is hinged with the limiting screw; the adjusting crank is fixed on the lifting shaft of the presser foot and has a The waist-shaped hole in the radial direction of the lifting shaft, the limit screw is slidably inserted in the waist-shaped hole. In the present invention, the adjustment of the alternating amount of the presser foot in the sewing machine has a high degree of automation, and is convenient to use and high in adjustability.

Description

technical field [0001] The invention belongs to the technical field of garment manufacturing equipment, and relates to a sewing machine, in particular to a device for adjusting the alternate amount of presser feet on the sewing machine 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 presser foot is an important part of the sewing machine, which is used to press the sewing material to ensure the accuracy and reliability of sewing. The sewing machine sometimes sews thicker sewing materials, or the sewing materials need to be folded and sewn during the sewing process. Since the thickness of the sewing materials is quite different from the original ordinary sewing materials, it is necessary to adjust the alternating amount of the presser foot at this time. Otherwise, the alternate lifti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B29/02
CPCD05B29/02
Inventor 郑聪李军飞
Owner JACK SEWING MASCH CO LTD
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