CN106757848B - Thread cutting mechanism of industrial sewing machine - Google Patents
Thread cutting mechanism of industrial sewing machine Download PDFInfo
- Publication number
- CN106757848B CN106757848B CN201611196488.5A CN201611196488A CN106757848B CN 106757848 B CN106757848 B CN 106757848B CN 201611196488 A CN201611196488 A CN 201611196488A CN 106757848 B CN106757848 B CN 106757848B
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- Prior art keywords
- cutter
- tool rest
- connecting rod
- knife rest
- crank
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention relates to the technical field of sewing, in particular to a thread trimming mechanism of an industrial sewing machine. The novel yarn cutting machine is simple in structure, the two movable cutters are adopted to rotate, the cost is reduced, the length of the yarn end is shortened to 3mm after yarn cutting, the labor force of a trimming part is saved, the cost is saved, and the production efficiency is improved. The cutter cutting device adopts the technical scheme that the cutter cutting device comprises a bottom plate, a cutter frame saddle and a cutter frame saddle, wherein the cutter frame saddle is arranged on the side surface of the bottom plate and is concentric with a large circular hole; the cutter saddle is equipped with right and left knife rest from the right side to left side in proper order, has linked firmly left and right cutter on the left and right knife rest respectively, and the cutter drive shaft is equipped with torsional spring, crank from the right side to left side in proper order, has connected gradually left knife rest connecting rod, right knife rest connecting rod one, right knife rest crank, right knife rest connecting rod two on the crank, and left knife rest connecting rod is connected with left knife rest, and right knife rest connecting rod two is connected with right knife rest.
Description
Technical Field
The invention relates to the technical field of sewing, in particular to a thread trimming mechanism of an industrial sewing machine.
Background
The sewing machine generally needs two cutters to be meshed to cut threads when cutting threads, the conventional structure mainly comprises a movable cutter and a fixed cutter fixed on a bottom plate and fixed to the bottom plate, the fixed cutter is 2-4mm away from a needle plate hole, during thread cutting, a driving part drives the movable cutter to rotate towards the direction of the fixed cutter, and the movable cutter is meshed with the fixed cutter at a position 2-4mm away from the needle plate hole to complete thread cutting action.
Disclosure of Invention
The invention aims to provide a thread trimming mechanism of an industrial sewing machine, which has a simple structure, adopts two movable cutters to rotate, reduces the cost, shortens the length of a thread end to 3mm after thread trimming, completely meets the requirements of clothing manufacturers, saves the labor force of a trimming part, saves the cost and improves the production efficiency.
In order to solve the problems in the prior art, the technical scheme of the invention is as follows: the utility model provides an industry sewing machine thread trimming mechanism which characterized in that: the cutting device comprises a bottom plate, a needle plate, a knife rest saddle, a cutter driving shaft, a torsion spring, a crank, a mounting seat and a wire distributing sheet, wherein a large round hole is formed in the middle of the side surface below the bottom plate, a small round hole is formed in the left lower side of the large round hole, a small round surface is formed in the right lower side of the large round hole, and a screw hole is formed in the center of the small round surface; the cutter frame saddle is arranged on the side surface and is concentric with the large circular hole, the cutter driving shaft penetrates through the small circular hole of the bottom plate, and the wire distributing sheet is fixed at the upper right position of the large circular hole of the bottom plate through the mounting seat; the cutter rest saddle is sequentially sleeved with a right cutter rest and a left cutter rest from right to left, a cutter rest gasket fixedly connected with the cutter rest saddle is arranged at the front end of the left cutter rest, a left cutter is fixedly connected to the left cutter rest, and a right cutter is fixedly connected to the right cutter rest;
the cutter driving shaft is sequentially sleeved with a torsion spring and a crank from right to left, the crank is fixedly connected with the cutter driving shaft, one end of the torsion spring is hooked on the extending end of the crank, and the other end of the torsion spring is limited in a hole beside the small round hole on the side surface of the bottom plate and is fixed through a screw;
the other end of the crank is hinged with the left tool rest connecting rod and the right tool rest connecting rod through screws, the other end of the left tool rest connecting rod is hinged with an extension rod of the left tool rest through a first shaft position screw, the other end of the right tool rest connecting rod is hinged with one end of the right tool rest crank through a fourth shaft position screw, the other end of the right tool rest crank is hinged with one end of the right tool rest connecting rod through a second shaft position screw, the other end of the right tool rest connecting rod is hinged with the right tool rest through an eccentric pin, and the right tool rest crank is connected with a cushion block screw through a third shaft position screw.
The needle plate is provided with a needle plate hole.
The wire cutting mechanism is provided with two fulcrums, a first fulcrum is a cutter driving shaft, a second fulcrum is a cushion block screw, the two fulcrums respectively control the rotation of the left knife rest and the right knife rest, the first fulcrum controls the rotation of the left knife rest, the second fulcrum controls the rotation of the right knife rest, the two fulcrums are hinged with the crank through the second right knife rest connecting rod and the left knife rest connecting rod, and the rotation of parts on the two fulcrums can be driven by one power.
The cutter driving shaft is a driving link, the movement direction is clockwise rotation during working, the movement direction of the left tool rest is clockwise rotation through power transmission, the movement direction of the right tool rest is anticlockwise rotation, and finally the trimming line position is the center position of the needle plate hole.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts a structure that double pivots drive double knives to rotate in opposite directions, when in thread cutting, the left cutter and the right cutter rotate towards the center of the needle plate hole and are completely meshed when reaching the center of the needle plate hole to complete thread cutting, the shortest thread cutting end is 3mm, the requirement of clothing production can be completely met, unnecessary thread ends do not need to be trimmed, the labor force is saved, the cost is saved, the production efficiency is improved,
2. the invention keeps the original driving part, only adds the rotating fulcrum of the right cutter, and has strong universality of parts, low manufacturing cost and simple structure.
Drawings
FIG. 1 is a schematic view of a split structure of the present invention;
FIG. 2 is a schematic structural diagram of a base plate according to the present invention;
FIG. 3 is an assembly schematic of the present invention;
FIG. 4 is a schematic view of the bottomless assembly of the present invention;
FIG. 5 is a schematic view of the structure of the present invention in an initial state;
FIG. 6 is a schematic structural view of the present invention in an operating state;
description of reference numerals: 1-bottom plate, 1-1-big round hole, 1-2-side face, 1-3-small round hole, 1-4-small round face, 1-5-screw hole, 2-needle plate, 2-1-needle plate hole, 3-knife rest saddle, 4-right knife rest, 5-left knife rest, 6-left knife, 7-right knife, 8-knife rest washer, 9-knife driving shaft, 10-torsion spring, 11-crank, 12-left knife rest connecting rod, 13-right knife rest connecting rod I, 14-1-axial screw I, 14-2-axial screw II, 14-3-axial screw III, 14-4-axial screw IV, 15-screw, 16-eccentric pin, 17-right knife rest connecting rod II, 18-right tool rest crank, 19-cushion block screw, 20-mounting seat and 21-branching piece.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a thread trimming mechanism of an industrial sewing machine (see the figures 1-4), which comprises a bottom plate 1, a needle plate 2, a knife rest saddle 3, a cutter driving shaft 9, a torsion spring 10, a crank 11, a mounting seat 20 and a thread dividing sheet 21, wherein the needle plate 2 is provided with a needle plate hole 2-1, the middle of the side surface 1-2 below the bottom plate 1 is provided with a large round hole 1-1, the left lower side of the large round hole 1-1 is provided with a small round hole 1-3, the right lower side is provided with a small round surface 1-4, and the center of the small round surface 1-4 is provided with a screw hole 1-5; the cutter rest saddle 3 is arranged on the side surface 1-2 and is concentric with the large round hole 1-1, the cutter driving shaft 9 penetrates through the small round hole 1-3 of the bottom plate 1, and the wire distributing sheet 21 is fixed at the upper right position of the large round hole 1-1 of the bottom plate 1 through the mounting seat 20; the cutter rest saddle 3 is sequentially sleeved with a right cutter rest 4 and a left cutter rest 5 from right to left, the front end of the left cutter rest 5 is provided with a cutter rest gasket 8 fixedly connected with the cutter rest saddle 3, the left cutter rest 5 is fixedly connected with a left cutter 6, and the right cutter rest 4 is fixedly connected with a right cutter 7;
a torsion spring 10 and a crank 11 are sequentially sleeved on the cutter driving shaft 9 from right to left, the crank 11 is fixedly connected with the cutter driving shaft 9, one end of the torsion spring 10 is hooked on the extending end of the crank 11, and the other end of the torsion spring is limited in a hole beside a small round hole 1-3 on the side surface 1-2 of the bottom plate 1 and is fixed through a screw;
the other end of the crank 11 is hinged with a left tool rest connecting rod 12 and a right tool rest connecting rod 13 through screws 15, the other end of the left tool rest connecting rod 12 is hinged with an extension rod of a left tool rest 5 through a first axial position screw 14-1, the other end of the right tool rest connecting rod 13 is hinged with one end of a right tool rest crank 18 through a fourth axial position screw 14-4, the other end of the right tool rest crank 18 is hinged with one end of a right tool rest connecting rod 17 through a second axial position screw 14-2, the other end of the right tool rest connecting rod 17 is hinged with the right tool rest 4 through an eccentric pin 16, a part of the right tool rest 4 hinged with the right tool rest connecting rod 17 is an eccentric pin 16, the eccentric amount of the eccentric pin 16 is 1mm, and the meshing amount of the right cutter 7 and the left cutter 6 can be slightly adjusted through the rotation of the eccentric pin 16.
The right tool holder crank 18 is connected with a cushion block screw 19 through a third shaft position screw 14-3.
The needle plate 2 is arranged above the left cutter and the right cutter.
The wire cutting mechanism of the invention is provided with two fulcrums, wherein the first fulcrum is a cutter driving shaft 9, the second fulcrum is a cushion block screw 19, the two fulcrums respectively control the rotation of the left knife rest 5 and the right knife rest 4, the first fulcrum controls the rotation of the left knife rest 5, the second fulcrum controls the rotation of the right knife rest 4, and the two fulcrums are hinged with a crank 11 through a right knife rest connecting rod II 17 and a left knife rest connecting rod 12, so that the rotation of parts on the two fulcrums can be driven by one power.
The cutter driving shaft 9 is a driving link, the movement direction is clockwise rotation during working, the movement direction of the left tool rest 5 is clockwise rotation through power transmission, the movement direction of the right tool rest 4 is counterclockwise rotation, and finally the line shearing position is the central position of the needle plate hole 2-1.
Working process of the invention (see fig. 5 and 6):
in the operation process of the machine, the thread cutting mechanism is in the initial state shown in figure 5 under the action of a torsion spring, a cutter driving shaft 9 drives a crank 11 to rotate clockwise during thread cutting, the crank 11 drives a left tool rest connecting rod 12 and a right tool rest connecting rod I13 to rotate clockwise, a left tool rest 5 rotates clockwise towards the center of a needle plate hole under the action of the left tool rest connecting rod 12, the right tool rest connecting rod I13 drives a right tool rest crank 18 to rotate clockwise on a cushion block screw 19, the other end of the right tool rest crank 18 drives a right tool rest connecting rod II 17 to rotate clockwise, the right tool rest 4 rotates anticlockwise towards the center of the needle plate hole, when a bottom thread, a shuttle thread and a formed thread ring which are hooked come in front reach the lower part of the needle plate 2, the bottom thread and the thread ring are separated by a thread separating sheet 21 which is blocked in front, the bottom thread and the thread ring are separated to one side and are guided into a thread containing groove on the surface of the left cutter 6, the left cutter 6 and the right cutter 7, the needle plate hole 2-1 rotates in opposite directions, when the needle plate hole 2-1 is reached, the bottom line and the surface line are just taken into the shearing hole of the left cutter 6, the right cutter 7 is meshed with the left cutter 6 at the moment to reach the maximum state, the cutting edge of the right cutter cuts the upper edge of the shearing hole of the left cutter 6 to cut off the bottom line and the surface line, the thread shearing is completed, and the crank 11 rotates to the state shown in the figure 5 under the action of the reset torsion spring 10 after the thread shearing, so that the left cutter 6 and the right cutter 7 reset.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (3)
1. Industrial sewing machine thread trimming mechanism, its characterized in that: the thread dividing device comprises a bottom plate (1), a needle plate (2), a knife rest saddle (3), a cutter driving shaft (9), a torsion spring (10), a crank (11), a mounting seat (20) and a thread dividing sheet (21), wherein a large round hole (1-1) is formed in the middle of a side surface (1-2) below the bottom plate (1), a small round hole (1-3) is formed in the left lower side of the large round hole (1-1), a small round surface (1-4) is formed in the right lower side of the large round hole (1-1), and a screw hole (1-5) is formed in the center of the small round surface (1-4); the cutter rest saddle (3) is arranged on the side surface (1-2) and is concentric with the large round hole (1-1), the cutter driving shaft (9) penetrates through the small round hole (1-3) of the bottom plate (1), and the wire distributing sheet (21) is fixed at the upper right position of the large round hole (1-1) of the bottom plate (1) through the mounting seat (20); a right tool rest (4) and a left tool rest (5) are sequentially sleeved on the tool rest saddle (3) from right to left, a tool rest gasket (8) fixedly connected with the tool rest saddle (3) is arranged at the front end of the left tool rest (5), a left cutter (6) is fixedly connected to the left tool rest (5), and a right cutter (7) is fixedly connected to the right tool rest (4);
a torsion spring (10) and a crank (11) are sequentially sleeved on the cutter driving shaft (9) from right to left, the crank (11) is fixedly connected with the cutter driving shaft (9), one end of the torsion spring (10) is hooked on the extending end of the crank (11), and the other end of the torsion spring is limited in a hole beside the small round hole (1-3) on the side surface (1-2) of the bottom plate (1) and is fixed through a screw;
the other end of the crank (11) is hinged with a left tool rest connecting rod (12) and a right tool rest connecting rod (13) through screws (15), the other end of the left tool rest connecting rod (12) is hinged with an extension rod of a left tool rest (5) through a shaft position screw I (14-1), the other end of the right tool rest connecting rod I (13) is hinged with one end of a right tool rest crank (18) through a shaft position screw II (14-4), the other end of the right tool rest crank (18) is hinged with one end of a right tool rest connecting rod II (17) through a shaft position screw II (14-2), the other end of the right tool rest connecting rod II (17) is hinged with a right tool rest (4) through an eccentric pin (16), and the right tool rest (18) is connected with a cushion block screw (19) through a shaft position screw III (14-3);
the trimming mechanism forms two fulcrums, a first fulcrum of the trimming mechanism is a cutter driving shaft (9), a second fulcrum of the trimming mechanism is a cushion block screw (19), the two fulcrums respectively control the rotation of the left knife rest (5) and the right knife rest (4), the first fulcrum controls the rotation of the left knife rest (5), the second fulcrum controls the rotation of the right knife rest (4), the two fulcrums are hinged with the crank (11) through the second right knife rest connecting rod (17) and the left knife rest connecting rod (12), and the rotation of parts on the two fulcrums can be driven by one power.
2. The thread trimming mechanism of an industrial sewing machine as claimed in claim 1, wherein: the needle plate (2) is provided with a needle plate hole (2-1).
3. The thread trimming mechanism of an industrial sewing machine according to claim 1 or 2, wherein: the cutter driving shaft (9) is a driving link, the movement direction is clockwise rotation during working, the movement direction of the left cutter rest (5) is clockwise rotation through power transmission, the movement direction of the right cutter rest (4) is anticlockwise rotation, and finally the line shearing position is the central position of the needle plate hole (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196488.5A CN106757848B (en) | 2016-12-22 | 2016-12-22 | Thread cutting mechanism of industrial sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611196488.5A CN106757848B (en) | 2016-12-22 | 2016-12-22 | Thread cutting mechanism of industrial sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106757848A CN106757848A (en) | 2017-05-31 |
| CN106757848B true CN106757848B (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611196488.5A Active CN106757848B (en) | 2016-12-22 | 2016-12-22 | Thread cutting mechanism of industrial sewing machine |
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| Country | Link |
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| CN (1) | CN106757848B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119394A (en) * | 2017-06-23 | 2017-09-01 | 西安标准工业股份有限公司 | The thread cutting mechanism of double-crank driving |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04303497A (en) * | 1991-03-29 | 1992-10-27 | Juki Corp | Thread cutting device for sewing machine |
| CN1236034A (en) * | 1998-05-07 | 1999-11-24 | 重机株式会社 | Thread cutter for sewing machine |
| CN103225183A (en) * | 2012-01-25 | 2013-07-31 | 兄弟工业株式会社 | A sewing machine |
| CN203229744U (en) * | 2012-03-30 | 2013-10-09 | 兄弟工业株式会社 | Sewing machine |
| CN105862275A (en) * | 2016-06-22 | 2016-08-17 | 杰克缝纫机股份有限公司 | Short loose threads double-shear mechanism |
| CN206319138U (en) * | 2016-12-22 | 2017-07-11 | 西安标准工业股份有限公司 | A kind of industrial sewing machine thread cutting mechanism |
-
2016
- 2016-12-22 CN CN201611196488.5A patent/CN106757848B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04303497A (en) * | 1991-03-29 | 1992-10-27 | Juki Corp | Thread cutting device for sewing machine |
| CN1236034A (en) * | 1998-05-07 | 1999-11-24 | 重机株式会社 | Thread cutter for sewing machine |
| CN103225183A (en) * | 2012-01-25 | 2013-07-31 | 兄弟工业株式会社 | A sewing machine |
| CN203229744U (en) * | 2012-03-30 | 2013-10-09 | 兄弟工业株式会社 | Sewing machine |
| CN105862275A (en) * | 2016-06-22 | 2016-08-17 | 杰克缝纫机股份有限公司 | Short loose threads double-shear mechanism |
| CN206319138U (en) * | 2016-12-22 | 2017-07-11 | 西安标准工业股份有限公司 | A kind of industrial sewing machine thread cutting mechanism |
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| CN106757848A (en) | 2017-05-31 |
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