CN109881384B - Sewing machine capable of manually adjusting stroke of take-up lever - Google Patents
Sewing machine capable of manually adjusting stroke of take-up lever Download PDFInfo
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- CN109881384B CN109881384B CN201910192079.5A CN201910192079A CN109881384B CN 109881384 B CN109881384 B CN 109881384B CN 201910192079 A CN201910192079 A CN 201910192079A CN 109881384 B CN109881384 B CN 109881384B
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Abstract
The invention discloses a sewing machine for manually adjusting the stroke of a take-up lever, which comprises a machine shell, the take-up lever, a take-up connecting rod pin, a take-up connecting rod, an eccentric pin connecting rod, a connecting pin and a stroke adjusting knob. The thread take-up connecting rod pin is hinged with the shell; one end of the take-up connecting rod is hinged with the take-up lever, and the other end of the take-up connecting rod is hinged with the take-up connecting rod pin; a pin column is arranged on the rear side wall of the connecting pin, the pin column is hinged with the other end of the eccentric pin connecting rod, and the other end of the eccentric pin connecting rod is hinged with the thread take-up connecting rod pin; the stroke adjusting knob is rotatably inserted in the connecting pin; the stroke adjusting knob is installed on the shell, and the lower end of the stroke adjusting knob is rotatably inserted in the connecting pin. The invention changes the eccentric position of the thread take-up connecting rod pin by manually controlling the movement of the stroke adjusting knob so as to adjust the thread take-up movement track of the thread take-up rod and further cause the change of the thread supply amount. The thread take-up lever has larger variation range of thread supply amount and is more precise.
Description
Technical Field
The invention relates to the technical field of adjustment of the stroke of a take-up lever of a sewing machine, in particular to a sewing machine for manually adjusting the stroke of the take-up lever.
Background
The adaptability of the traditional sewing machine to the thickness of the sewing fabric is related to the stroke of a take-up lever in a take-up mechanism. However, the existing thread take-up mechanism and its accessories have fixed mechanism size, the thread supply amount of the thread take-up lever cannot be adjusted, or the adjustment range is very limited. Some thread take-up levers change the stroke of the thread take-up lever by providing a plurality of holes, but the number of the holes is limited, and the amount of thread supplied is not so much changed. Or the purpose of adjusting the thread take-up stroke is achieved by adding a thread take-up connecting rod pin positioning plane, but the panel needs to be detached and adjusted manually. And the number of the positioning planes increased by the thread take-up connecting rod pin is limited due to the structure, so that the thread take-up stroke change amount which can be realized is very limited. These factors limit the adaptability of the sewing machine to the thickness of the material to be sewn. Because less thread supply is required for thin material to ensure stitch quality. And the thick material needs more wire supply amount to ensure the faults of no wire break and the like. The sewing machine has poor adaptability to the sewing of thin and thick materials, thereby improving the purchasing cost of enterprises on one hand and reducing the competitiveness of sewing equipment on the other hand.
Disclosure of Invention
The invention aims to provide a sewing machine for manually adjusting the stroke of a take-up lever, which aims to solve the problem that the conventional sewing machine cannot change the thread supply amount of the take-up lever according to the thickness of a sewing fabric.
In order to achieve the purpose, the invention provides the following technical scheme: a sewing machine for manually adjusting the stroke of a thread take-up lever, comprising:
a housing;
a take-up lever;
the sewing machine further includes:
one end of the take-up connecting rod pin is hinged with the shell, and the take-up connecting rod pin is of an eccentric structure;
one end of the take-up connecting rod is hinged with the take-up lever, and the other end of the take-up connecting rod is hinged with the take-up connecting rod pin;
the screw pair mechanism is arranged on the machine shell and used for adjusting the eccentric position of the thread take-up connecting rod pin;
one end of the eccentric pin connecting rod is connected with the spiral pair mechanism, and the other end of the eccentric pin connecting rod is hinged with the thread take-up connecting rod pin;
wherein, the screw pair mechanism includes:
the back side wall of the connecting pin is provided with a pin column, and the pin column is hinged with the other end of the eccentric pin connecting rod;
and the stroke adjusting knob is arranged on the shell, and the lower end of the stroke adjusting knob is rotatably inserted in the connecting pin.
Preferably, the screw pair mechanism further comprises:
and the stroke adjusting nut is in threaded connection with the stroke adjusting knob and is arranged on the shell.
Preferably, the lower end of the stroke adjusting knob is provided with a clamp spring groove, the clamp spring groove is located below the connecting pin, and the screw pair mechanism further comprises:
and the first clamp spring is embedded in the clamp spring groove.
Preferably, the sewing machine further comprises:
and the clamp spring II is arranged at the front end of the take-up connecting rod pin.
Preferably, the lower end of the stroke adjusting knob is provided with a step surface, and the step surface is positioned inside the connecting pin.
Preferably, one end of the take-up lever is provided with a thread passing hole.
Preferably, the stroke adjusting knob is engraved with a scale ruler.
Preferably, the sewing machine further comprises:
and one end of the needle bar crank is hinged with the machine shell, and the other end of the needle bar crank is hinged with the other end of the thread take-up lever.
Preferably, one end of the needle bar crank is hinged with the machine shell through a main shaft.
Preferably, the other end of the needle bar crank is hinged with the other end of the thread take-up lever through a bearing.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention changes the eccentric position of the thread take-up connecting rod pin by manually controlling the movement of the stroke adjusting knob so as to adjust the thread take-up movement track of the thread take-up rod and further cause the change of the thread supply amount. The thread supply quantity of the take-up lever has a wider and more precise change range, can meet the requirement of adjusting the thread supply quantity of different fabrics, and improves the adaptability of the sewing machine to different fabric thicknesses.
2. Compared with a stepping thread-picking scheme, the invention has simpler structure and lower cost and can be applied to almost all machine types at present. Especially has great competitive advantage on some middle and low-end models.
3. The stroke adjusting knob is also provided with a scale ruler, and stroke setting can be automatically carried out according to the cloth thickness condition. The operation is more convenient and more convenient.
4. The mechanism of the invention can increase the adaptability of the sewing machine to the working condition, reduce the purchasing cost of enterprises and improve the competitiveness of sewing equipment.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of the structure of the present invention;
FIG. 3 is a schematic view of a housing structure;
fig. 4 is a schematic diagram of the working principle of the structure of the invention.
In the figure: the thread take-up mechanism comprises a machine shell 1, a stroke adjusting knob 2, a connecting pin 3, a clamp spring I4, a clamp spring II 5, a thread take-up connecting rod pin 6, a needle rod crank 7, a main shaft 8, a bearing 9, a thread take-up rod 10, a thread through hole 10-1, a thread take-up connecting rod 11, an eccentric pin connecting rod 12 and a stroke adjusting nut 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, the present embodiment provides a sewing machine for manually adjusting the stroke of a thread take-up lever, which includes a housing 1, a thread take-up link pin 6, a needle bar crank 7, a main shaft 8, a bearing 9, a thread take-up lever 10, a thread take-up link 11, an eccentric pin link 12, and a screw pair mechanism.
Wherein, one end of the needle rod crank 7 is hinged with the machine shell 1, and the other end of the needle rod crank 7 is hinged with the other end of the thread take-up lever 10. One end of the thread take-up lever 10 is provided with a thread passing hole 10-1. The upper thread passes through the thread passing hole 10-1 when the sewing machine works. In this embodiment, one end of the needle bar crank 7 is hinged to the housing 1 through a main shaft 8, and the other end of the needle bar crank 7 is hinged to the other end of the thread take-up lever 10 through a bearing 9. One end of the thread take-up link 11 is hinged with the thread take-up lever 10, and the other end of the thread take-up link 11 is hinged with the thread take-up link pin 6. One end of the thread take-up connecting rod pin 6 is hinged with the machine shell 1. And the thread take-up connecting rod pin 6 is in an eccentric structure.
In the sewing cycle of the sewing machine, the thread supply amount of the thread take-up mechanism is always slightly larger than the thread demand amount of the cloth pricking mechanism and the thread hooking mechanism. In actual work, for thin materials, the difference between the maximum wire supply amount and the maximum wire demand amount is preferably 5 mm; for thick stock, the difference is preferably 8 mm. When the maximum required line quantity is fixed, the difference value can be controlled by changing the maximum supply line quantity. And the maximum thread supply amount is determined by the motion track of the thread through hole 10-1 on the thread take-up lever 10. Therefore, in the embodiment, the maximum yarn supply amount can be changed only by regulating the movement track of the yarn passing hole 10-1, so that the yarn guide device is suitable for the thicknesses of different fabrics. Specifically, in this embodiment, the movement track of the wire through hole 10-1 can be regulated and controlled by the screw pair mechanism. That is, a screw pair mechanism is provided on the housing 1 for adjusting the eccentric position of the thread take-up link pin 6. One end of the eccentric pin connecting rod 12 is connected with a screw pair mechanism. The other end of the eccentric pin connecting rod 12 is hinged with the thread take-up connecting rod pin 6.
The screw pair mechanism comprises a stroke adjusting knob 2, a connecting pin 3, a stroke adjusting nut 13 and a clamp spring I4.
Wherein, the back side wall of the connecting pin 3 is provided with a pin. The pin is hinged to the other end of the eccentric pin connecting rod 12. The stroke adjustment knob 2 is mounted on the housing 1. And the lower end of the stroke adjusting knob 2 is rotatably inserted in the connecting pin 3. Specifically, in the present embodiment, the method for installing the stroke adjustment knob 2 on the casing 1 includes: the stroke adjusting nut 13 is screwed with the stroke adjusting knob 2. The stroke adjustment nut 13 is mounted on the housing 1. The lower end of the stroke adjusting knob 2 is provided with a clamp spring groove. The circlip groove is located below the connecting pin 3. The clamp spring I4 is embedded in the clamp spring groove. And the lower end of the stroke adjusting knob 2 is provided with a step surface. The step surface is located inside the connecting stud 3. In the embodiment, the axial displacement of the connecting pin 3 is limited by the clamp spring I4 and the step surface together. In order to limit the axial movement of the thread take-up connecting rod 11 and the eccentric pin connecting rod 12, a second snap spring 5 can be arranged on the thread take-up connecting rod pin 6 in the embodiment. Namely, the sewing machine also comprises a clamp spring II 5. The clamp spring II 5 is arranged at the front end of the thread take-up connecting rod pin 6.
In this embodiment, during the operation of the sewing machine, the main shaft 8 rotates to drive the thread take-up lever 10 to move. The upper and lower thread-taking-up motion of the willow-leaf-shaped motion track is made at the thread passing hole 10-1 on the thread-taking-up rod 10, so that the upper thread is correspondingly tightened and loosened when the upper thread moves up and down on the needle rod, thereby forming a perfect stitch. The distance between the highest point and the lowest point of the thread take-up motion trajectory is the stroke of the thread take-up lever 10 for supplying the thread. When the position of the thread take-up link pin 6 is determined, the thread take-up movement locus is determined. As can be seen from the above description, in the present embodiment, the thread take-up motion trajectory of the thread passing hole 10-1 can be changed by changing the position of the thread take-up link pin 6, and then the thread supply amount of the thread take-up lever 10 can be changed.
The method of changing the position of the thread take-up link pin 6 in this embodiment is: the stroke adjusting knob 2 is manually rotated up and down, and the thread take-up connecting rod pin 6 is rotated by different angles through the eccentric pin connecting rod 12. Therefore, the stroke of the highest point and the lowest point of the thread passing hole 10-1 at the tail end of the take-up lever 10 can be regulated, and the thread supply amount of the cloth can be regulated according to fabrics with different thicknesses. By the method in the embodiment, the adaptability of the working condition of the sewing machine can be improved, the purchasing cost of enterprises is reduced, and the competitiveness of sewing equipment is improved.
Referring to fig. 4, specifically, when the seam material encountered is thin, the stroke adjustment knob 2 is screwed in the upward movement direction. The connecting pin 3 moves upwards along with the stroke adjusting knob 2 and drives the eccentric pin connecting rod 12 to rotate clockwise by a certain angle. The eccentric pin link 12 simultaneously causes the thread take-up link pin 6 to swing clockwise by a corresponding angle. At this time, the position of the hinged position of the take-up link 11 and the take-up link pin 6 is deviated, so that the stroke between the highest point and the lowest point of the thread passing hole 10-1 at the tail end of the take-up lever 10 is reduced, the maximum thread supply amount is reduced, and the stitch appearance when sewing thin materials is ensured.
When the seam material is thick, the stroke adjusting knob 2 is screwed towards the direction of downward movement. The connecting pin 3 moves downwards along with the stroke adjusting knob 2, and drives the eccentric pin connecting rod 12 to rotate anticlockwise by a certain angle. The eccentric pin link 12 simultaneously causes the thread take-up link pin 6 to swing counterclockwise by a corresponding angle. At this time, the position of the hinged position of the take-up link 11 and the take-up link pin 6 is deviated, so that the stroke between the highest point and the lowest point of the thread passing hole 10-1 at the tail end of the take-up lever 10 is increased, the maximum thread supply amount is increased, and the stitch appearance when sewing thin materials is ensured.
In some embodiments, a section of the stroke adjustment knob 2 exposed from the casing 1 may be engraved with a scale. Thus, the depth of screwing the stroke adjustment knob 2 into the casing 1 can be displayed in real time with reference to the stroke adjustment nut 13. Meanwhile, in some embodiments, the linear motor can be automatically controlled to drive the stroke adjusting knob 2 to move so as to replace manual adjustment.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A sewing machine for manually adjusting the stroke of a thread take-up lever, comprising:
a housing (1);
a thread take-up lever (10);
characterized in that, the sewing machine further comprises:
the take-up connecting rod pin (6), one end of the take-up connecting rod pin (6) is hinged with the machine shell (1), and the take-up connecting rod pin (6) is of an eccentric structure;
the take-up device comprises a take-up connecting rod (11), one end of the take-up connecting rod (11) is hinged with the take-up lever (10), and the other end of the take-up connecting rod (11) is hinged with a take-up connecting rod pin (6);
one end of the needle rod crank (7) is hinged with the machine shell (1), and the other end of the needle rod crank (7) is hinged with the other end of the thread take-up lever (10);
the screw pair mechanism is arranged on the machine shell (1) and is used for adjusting the eccentric position of the take-up connecting rod pin (6);
one end of the eccentric pin connecting rod (12) is connected with the spiral pair mechanism, and the other end of the eccentric pin connecting rod (12) is hinged with the thread take-up connecting rod pin (6);
wherein, the screw pair mechanism includes:
the connecting pin (3), the back side wall of the connecting pin (3) is provided with a pin, and the pin is hinged with the other end of the eccentric pin connecting rod (12);
the stroke adjusting knob (2) is installed on the shell (1), and the lower end of the stroke adjusting knob (2) is rotatably inserted into the connecting pin (3).
2. The sewing machine for manually adjusting the stroke of the thread take-up lever according to claim 1, wherein the screw pair mechanism further comprises:
and the stroke adjusting nut (13) is in threaded connection with the stroke adjusting knob (2), and the stroke adjusting nut (13) is installed on the machine shell (1).
3. The sewing machine for manually adjusting the stroke of the take-up lever according to claim 1, wherein the stroke adjusting knob (2) is provided at a lower end thereof with a circlip groove located below the connecting pin (3), and the screw pair mechanism is further provided
The method comprises the following steps:
and the clamp spring I (4) is embedded in the clamp spring groove.
4. The sewing machine for manually adjusting the stroke of the thread take-up lever according to claim 1, further comprising:
and the clamp spring II (5) is arranged at the front end of the take-up connecting rod pin (6).
5. The sewing machine for manually adjusting the stroke of the take-up lever according to claim 1, wherein the lower end of the stroke adjusting knob (2) is provided with a step surface, and the step surface is positioned inside the connecting pin (3).
6. The sewing machine for manually adjusting the stroke of the take-up lever according to claim 1, wherein one end of the take-up lever (10) is provided with a thread passing hole (10-1).
7. The sewing machine for manually adjusting the stroke of the take-up lever according to claim 1, wherein the stroke adjusting knob (2) is engraved with a scale.
8. The sewing machine for manually adjusting the stroke of the take-up lever according to claim 1, characterized in that one end of the lever crank (7) is hinged to the housing (1) through a main shaft (8).
9. The sewing machine for manually adjusting the stroke of the thread take-up lever according to claim 1, wherein the other end of the needle bar crank (7) is hinged to the other end of the thread take-up lever (10) through a bearing (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192079.5A CN109881384B (en) | 2019-03-14 | 2019-03-14 | Sewing machine capable of manually adjusting stroke of take-up lever |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192079.5A CN109881384B (en) | 2019-03-14 | 2019-03-14 | Sewing machine capable of manually adjusting stroke of take-up lever |
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| CN109881384A CN109881384A (en) | 2019-06-14 |
| CN109881384B true CN109881384B (en) | 2021-02-02 |
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| CN201910192079.5A Active CN109881384B (en) | 2019-03-14 | 2019-03-14 | Sewing machine capable of manually adjusting stroke of take-up lever |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114197120B (en) * | 2020-09-18 | 2023-08-11 | 杰克科技股份有限公司 | Thread take-up synchronous regulating mechanism of flat seaming machine |
| TWI769654B (en) * | 2021-01-06 | 2022-07-01 | 啟翔股份有限公司 | Sewing machine with changeable lifting lever |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0728973B2 (en) * | 1987-05-29 | 1995-04-05 | ブラザー工業株式会社 | Automatic thread tension sewing machine balance device |
| CN2154270Y (en) * | 1992-12-24 | 1994-01-26 | 周鹤鸣 | Five-rod raising wire structure with adjustable wire-supply length for sawing machine |
| CN1587480A (en) * | 2004-09-06 | 2005-03-02 | 周鹤鸣 | Crank arm thread take-up mechanism for thick material sewing machine |
| JP2009195449A (en) * | 2008-02-21 | 2009-09-03 | Brother Ind Ltd | Thread take-up device for sewing machine, sewing machine, control program for changing thread take-up lever stroke, and recording medium for changing thread take-up lever stroke |
| CN205636083U (en) * | 2016-04-07 | 2016-10-12 | 浙江中捷缝纫科技有限公司 | Needle bar driving mechanism |
| CN109402885A (en) * | 2018-11-28 | 2019-03-01 | 杰克缝纫机股份有限公司 | The Yarn taking-up mechanism and sewing machine of use in sewing machine |
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Address after: 318000 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee after: Jack Technology Co.,Ltd. Address before: 318000 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |
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Address after: 318000 no.1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318000 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: Jack Technology Co.,Ltd. |
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