CN107099947B - Thread take-up stroke adjustable structure and sewing machine - Google Patents

Thread take-up stroke adjustable structure and sewing machine Download PDF

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Publication number
CN107099947B
CN107099947B CN201710288633.0A CN201710288633A CN107099947B CN 107099947 B CN107099947 B CN 107099947B CN 201710288633 A CN201710288633 A CN 201710288633A CN 107099947 B CN107099947 B CN 107099947B
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eccentric wheel
shaft
plate
take
eccentric
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CN201710288633.0A
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CN107099947A (en
Inventor
邱丽
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Jack Sewing Machine Co Ltd
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Jack Sewing Machine Co Ltd
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    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B49/00Take-up devices, e.g. levers, for the needle thread

Abstract

The invention belongs to the technical field of sewing machines, and relates to a take-up stroke adjustable structure and a sewing machine. Wherein the adjustable structure of thread take-up stroke includes: an upper shaft; an eccentric wheel I sleeved on the upper shaft; the eccentric wheel II is sleeved on the eccentric wheel I and can rotate on the eccentric wheel I to adjust the eccentric size; a connecting rod is sleeved outside the eccentric wheel II; the other end of the connecting rod is connected to a crank, and the crank is arranged on the take-up shaft; the upper shaft rotates to drive the eccentric wheel I and the eccentric wheel II to rotate, the eccentric wheel II drives the connecting rod to move up and down, and the up-and-down movement of the connecting rod is converted into the rotary swing of the take-up shaft through the crank. The invention realizes the adjustment of the eccentric size by arranging the eccentric wheel I and the eccentric wheel II on the upper shaft, thereby realizing the change of the rotating angle of the take-up shaft, realizing the adjustment of the take-up amount, better adjusting the tightness of the needle thread, greatly improving the universality of the sewing machine, reducing the use cost and optimizing the stitch seam.

Description

Thread take-up stroke adjustable structure and sewing machine
Technical Field
The invention belongs to the technical field of sewing machines, and relates to a take-up stroke adjustable structure and a sewing machine.
Background
When sewing work is performed, the sewing material has different thicknesses. In the face of sewing materials of different types, the thickness of sewing can be greatly changed, in order to better adapt to different conditions, the sewing machine is usually realized by a special thick material machine or a thin material machine, the universality of the machine is poor, and the working efficiency is reduced.
The conventional wiring structure is as follows (as shown in fig. 1): the take-up device comprises an upper shaft 1, wherein an eccentric wheel 2 is arranged on the upper shaft 1, one end of a connecting rod 3 is sleeved on the eccentric wheel 2, the other end of the connecting rod is connected with a crank 4, the crank 4 is fixedly arranged on a take-up shaft 5, and a thread passing plate is further arranged on the take-up shaft 5. The working principle is as follows: the eccentric wheel 2 on the upper shaft 1 drives the take-up shaft 5 to swing, and the swing of the take-up shaft 5 drives the long thread passing plate to swing to take up threads.
Because the eccentric wheel has a certain eccentric size on the upper shaft, the corresponding eccentric size can be set only for thick materials and thin materials, so that the sewing machine is suitable for sewing between the thick materials and the thin materials.
Disclosure of Invention
The invention provides a thread take-up stroke adjustable structure and a sewing machine aiming at the problems in the prior art, and the invention aims to solve the technical problems that: the sewing machine is suitable for sewing thick materials and thin materials, and the use cost is reduced.
The purpose of the invention can be realized by the following technical scheme:
one of the objects of the present invention is to provide a thread take-up stroke adjustable structure,
a thread take-up stroke adjustable structure comprising: an upper shaft;
the eccentric wheel I is sleeved on the upper shaft;
the eccentric wheel II is sleeved on the eccentric wheel I and can rotate on the eccentric wheel I to adjust the eccentric size;
one end of the connecting rod is sleeved outside the eccentric wheel II;
one end of the crank is arranged on the take-up shaft, and the other end of the crank is connected to the other end of the connecting rod;
the upper shaft rotates to drive the eccentric wheel I and the eccentric wheel II to rotate, the eccentric wheel II drives the connecting rod to move up and down, and the up-and-down movement of the connecting rod is converted into the rotary swing of the take-up shaft through the crank.
In the thread take-up stroke adjustable structure, the eccentric wheel I and the eccentric wheel II are respectively provided with a notch, and the notches on the eccentric wheel I and the eccentric wheel II are aligned after adjustment.
In the thread take-up stroke adjustable structure, the eccentric wheel II rotates 180 degrees around the eccentric wheel I to realize the eccentric size switching of thick materials and thin materials.
In the above structure with adjustable thread take-up stroke, the eccentric wheel I comprises a first main body and a first end plate arranged on one end face of the first main body, the first main body and the first end plate are eccentrically arranged, an upper shaft hole is centrally arranged on the first end plate, and the upper shaft hole penetrates through the first main body.
In the above-mentioned thread take-up stroke adjustable structure, the eccentricity between the first main body and the first end plate is 3.25 ± 0.05 mm.
In the above structure with adjustable thread take-up stroke, the eccentric wheel II comprises a second main body and a second end plate arranged on one end surface of the second main body, the second main body and the second end plate are eccentrically arranged, an eccentric wheel hole is centrally arranged on the second end plate, and the eccentric wheel hole penetrates through the second main body.
In the above-mentioned thread take-up stroke adjustable structure, the eccentricity between the second body and the second end plate is 0.25 ± 0.05 mm.
In the thread take-up stroke adjustable structure, the eccentric wheel II is fixedly connected with the eccentric wheel I through a screw arranged in the radial direction.
In the above thread take-up stroke adjustable structure, one end of the connecting rod is arranged between the first end plate and the second end plate.
Another object of the present invention is to provide a sewing machine including the thread take-up stroke adjusting structure.
Compared with the prior art, the invention has the following advantages:
the invention realizes the adjustment of the eccentric size by arranging the eccentric wheel I and the eccentric wheel II on the upper shaft, thereby realizing the change of the rotation angle of the take-up shaft, realizing the adjustment of the take-up amount, better adjusting the tightness of the needle thread, solving the problem that the professional machine needs to be switched when thick materials and thin materials are sewn in the prior art, greatly improving the universality of the sewing machine, reducing the use cost and optimizing the stitches.
Drawings
Fig. 1 is a schematic structural diagram of the background art.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural view of the wire passing plate of the present invention.
Fig. 4 is an exploded schematic view of the present invention.
Fig. 5 is a schematic structural view of the eccentric wheel I of the present invention.
Fig. 6 is a front view of the eccentric I of the invention.
Fig. 7 is a schematic structural view of the eccentric wheel II of the present invention.
Fig. 8 is a front view of the eccentric wheel II of the invention.
In the figure, 1, an upper shaft; 2. an eccentric wheel; 3. a connecting rod; 4. a crank; 5. a take-up shaft; 10. an upper shaft; 20. an eccentric wheel I; 201. a first body; 202. a first end plate; 203. an upper shaft hole; 30. an eccentric wheel II; 301. a second body; 302. a second end plate; 303. an eccentric wheel hole; 40. a connecting rod; 50. a crank; 60. a take-up shaft; 701. a notch; 702. a notch; 703. a notch; 704. a notch; 80. a wire passing plate seat; 90. a wire passing plate; 100. wire passing plate pressing plate.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 2-8. The invention provides a thread take-up stroke adjustable structure, comprising: upper shaft 10, eccentric wheel I20, eccentric wheel II 30, connecting rod 40 and crank 50. The eccentric wheel I20 is sleeved on the upper shaft 10 and is fixed through a screw; the eccentric wheel II 30 is sleeved on the eccentric wheel I20 and is fixed through a screw, and the eccentric wheel II 30 can rotate on the eccentric wheel I20 to adjust the eccentric size; and during adjustment, the screw is loosened, and the adjusting part is fixed through the screw after the adjustment is finished. One end of the connecting rod 40 is sleeved outside the eccentric wheel II 30; one end of the crank 50 is provided on the take-up shaft 60, and the other end is connected to the other end of the connecting rod 40. The crank 50 of the present invention is a ball crank. The take-up shaft 60 is provided with a thread guide plate seat 80, and the thread guide plate seat is provided with a thread guide plate 90 and a thread guide plate pressing plate 100. The eccentric wheel II 30 is fixedly connected with the eccentric wheel I20 through a screw arranged in the radial direction.
The upper shaft 10 rotates to drive the eccentric wheel I20 and the eccentric wheel II 30 to rotate, the eccentric wheel II 30 drives the connecting rod 40 to move up and down, and the up and down movement of the connecting rod 40 is converted into the rotary swing of the take-up shaft 60 through the crank 50.
The working principle of the invention is as follows:
when the thin material needs to be sewn, the eccentric wheel II 30 is rotated to enable the eccentric size between the connecting rod 40 and the upper shaft 10 to be small;
when thick materials need to be sewn, the eccentric wheel II 30 is rotated, so that the eccentric size between the connecting rod 40 and the upper shaft 10 is large.
In order to enable the eccentric wheel II to have a reference when rotating, notches are respectively arranged on the eccentric wheel I20 and the eccentric wheel II 30, and the notches on the eccentric wheel I20 and the eccentric wheel II 30 are aligned after adjustment.
The specific switching process is as follows: the eccentric wheel II 30 realizes the eccentric size switching of thick materials and thin materials every 180 degrees of rotation around the eccentric wheel I20. After rotation, the notches on the eccentric wheels I20 and II 30 are aligned.
Specifically, the eccentric wheel I20 includes a first main body 201 and a first end plate 202 disposed on an end surface of the first main body 201, the first main body 201 and the first end plate 202 are eccentrically disposed, an upper shaft hole 203 is centrally disposed on the first end plate 202, and the upper shaft hole 203 penetrates through the first main body 201.
Correspondingly, two notches are disposed on the first end plate 202, namely, the notch 701 and the notch 702, which are disposed along the radial direction of the first end plate 202. That is, the notches 701 and 702 are disposed at 180 ° intervals.
More specifically, the eccentricity D1 between the first body 201 and the first end plate 202 is 3.25 ± 0.05 mm. This embodiment is preferably 3.25 mm.
Specifically, the eccentric wheel II 30 includes a second main body 301 and a second end plate 301 disposed on an end surface of the second main body 302, the second main body 301 and the second end plate 302 are disposed eccentrically, an eccentric wheel hole 303 is centrally disposed on the second end plate 302, and the eccentric wheel hole 303 penetrates through the second main body 301.
Accordingly, two notches are provided on the second end plate 302, and are radially disposed along the second end plate 302. That is, two notches are provided at an interval of 180 °.
More specifically, the eccentricity D2 between the second body 301 and the second end plate 302 is 0.25 ± 0.05 mm. This embodiment is preferably 0.25 mm.
In the currently small size, preferably 3mm eccentric size between connecting rod 40 and upper shaft 10, the two notches 701, 702 on eccentric I20 are aligned one-to-one with the two notches 703, 704 on eccentric II 30, respectively.
When adjusting the eccentric dimension to a large dimension, preferably 3.5mm, between connecting rod 40 and upper shaft 10, the eccentric II 30 is rotated 180 ° until notch 701 on eccentric I20 aligns with notch 704 on eccentric II 30 and notch 702 aligns with notch 703. The notch can improve the adjustment precision. The change of the eccentric size can directly affect the swing angle of the take-up shaft 60, so that the routing stroke is changed, and the routing mechanism can be better adapted to different seam material thicknesses.
Accordingly, one end of the link 40 is disposed between the first end plate 202 and the second end plate 302. The first end plate 202 and the second end plate 302 limit the position of the connecting rod 40, and ensure that the connecting rod 40 does not run.
The invention further enlarges the adjustable range on the basis of the traditional thread-picking stroke adjustment, so that the machine can better adapt to the change of the thickness of the sewing material and always keep good stitches.
Another object of the present invention is to provide a sewing machine including the thread take-up stroke adjusting structure.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (10)

1. The utility model provides a take-up stroke adjustable structure which characterized in that: the method comprises the following steps:
an upper shaft (10);
the eccentric wheel I (20), the eccentric wheel I (20) is sleeved on the upper shaft (10);
the eccentric wheel II (30), the eccentric wheel II (30) is sleeved on the eccentric wheel I (20), and the eccentric wheel II (30) can rotate on the eccentric wheel I (20) to adjust the eccentric size;
one end of the connecting rod (40) is sleeved outside the eccentric wheel II (30);
a crank (50), one end of the crank (50) is arranged on the take-up shaft (60), and the other end of the crank is connected with the other end of the connecting rod (40);
the upper shaft (10) rotates to drive the eccentric wheel I (20) and the eccentric wheel II (30) to rotate, the eccentric wheel II (30) drives the connecting rod (40) to move up and down, and the up and down movement of the connecting rod (40) is converted into the rotary swing of the take-up shaft (60) through the crank (50);
the take-up shaft (60) is provided with a wire passing plate seat (80), and the wire passing plate seat (80) is provided with a wire passing plate (90) and a wire passing plate pressing plate (100);
the eccentric wheel II (30) rotates 180 degrees around the eccentric wheel I (20) to realize the eccentric size switching of thick materials and thin materials.
2. The thread take-up stroke adjustable structure as claimed in claim 1, wherein: notches are respectively arranged on the eccentric wheel I (20) and the eccentric wheel II (30), and the notches on the eccentric wheel I (20) and the eccentric wheel II (30) are aligned after adjustment.
3. The thread take-up stroke adjustable structure as claimed in claim 1 or 2, wherein: the eccentric wheel II (30) rotates 180 degrees around the eccentric wheel I (20) to realize the eccentric size switching of thick materials and thin materials.
4. The thread take-up stroke adjustable structure as claimed in claim 1, wherein: the eccentric wheel I (20) comprises a first main body (201) and a first end plate (202) arranged on one end face of the first main body (201), the first main body (201) and the first end plate (202) are eccentrically arranged, an upper shaft hole (203) is arranged in the middle of the first end plate (202), and the upper shaft hole (203) penetrates through the first main body (201).
5. The thread take-up stroke adjustable structure as claimed in claim 4, wherein: the eccentricity between the first body (201) and the first end plate (202) is 3.25 + -0.05 mm.
6. The thread take-up stroke adjustable structure as claimed in claim 4, wherein: the eccentric wheel II (30) comprises a second main body (301) and a second end plate (302) arranged on one end face of the second main body (301), the second main body (301) and the second end plate (302) are eccentrically arranged, an eccentric wheel hole (303) is arranged in the middle of the second end plate (302), and the eccentric wheel hole (303) penetrates through the second main body (301).
7. The thread take-up stroke adjustable structure as claimed in claim 6, wherein: the eccentricity between the second body (301) and the second end plate (302) is 0.25 + -0.05 mm.
8. The thread take-up stroke adjustable structure as claimed in claim 4, wherein: the eccentric wheel II (30) is fixedly connected with the eccentric wheel I (20) through a screw arranged in the radial direction.
9. The thread take-up stroke adjustable structure as claimed in claim 4 or 8, wherein: one end of the connecting rod (40) is arranged between the first end plate (202) and the second end plate (302).
10. A sewing machine characterized by: comprising a take-up stroke adjustable structure as claimed in any one of claims 1 to 9.
CN201710288633.0A 2017-04-27 2017-04-27 Thread take-up stroke adjustable structure and sewing machine Active CN107099947B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710288633.0A CN107099947B (en) 2017-04-27 2017-04-27 Thread take-up stroke adjustable structure and sewing machine

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Application Number Priority Date Filing Date Title
CN201710288633.0A CN107099947B (en) 2017-04-27 2017-04-27 Thread take-up stroke adjustable structure and sewing machine

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CN107099947B true CN107099947B (en) 2020-05-05

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107761271B (en) * 2017-11-22 2020-10-27 杰克缝纫机股份有限公司 Sewing machine and take-up eccentric device thereof
CN108060514A (en) * 2018-01-16 2018-05-22 杰克缝纫机股份有限公司 A kind of sewing machine Yarn taking-up mechanism and sewing machine
CN110952233B (en) * 2019-12-12 2021-06-04 东莞理工学院 Simple adjusting device of thread take-up mechanism of industrial sewing machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61176395A (en) * 1985-01-29 1986-08-08 Husqvarna Ab Balance apparatus of sewing machine
JPH02119892A (en) * 1988-10-28 1990-05-07 Juki Corp Movement adjusting device for thread take-up lever
CN1094768A (en) * 1994-02-08 1994-11-09 周鹤鸣 A kind of five lever take-up mechanisms of the confession regulated line amount of use in sewing machine
CN201459387U (en) * 2009-07-14 2010-05-12 上海富山精密机械科技有限公司 Mechanism for adjusting wire loop size of industrial multi-needle sewing machine
TW201319350A (en) * 2011-11-14 2013-05-16 Kaulin Mfg Co Ltd Adjustable stroke of take-up thread and needle rod of sewing machine
CN205990521U (en) * 2016-08-30 2017-03-01 杰克缝纫机股份有限公司 A kind of sewing machine Yarn taking-up mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61176395A (en) * 1985-01-29 1986-08-08 Husqvarna Ab Balance apparatus of sewing machine
JPH02119892A (en) * 1988-10-28 1990-05-07 Juki Corp Movement adjusting device for thread take-up lever
CN1094768A (en) * 1994-02-08 1994-11-09 周鹤鸣 A kind of five lever take-up mechanisms of the confession regulated line amount of use in sewing machine
CN201459387U (en) * 2009-07-14 2010-05-12 上海富山精密机械科技有限公司 Mechanism for adjusting wire loop size of industrial multi-needle sewing machine
TW201319350A (en) * 2011-11-14 2013-05-16 Kaulin Mfg Co Ltd Adjustable stroke of take-up thread and needle rod of sewing machine
CN205990521U (en) * 2016-08-30 2017-03-01 杰克缝纫机股份有限公司 A kind of sewing machine Yarn taking-up mechanism

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