CN109837660B - Driving device for automatically trimming and automatically lifting presser foot - Google Patents
Driving device for automatically trimming and automatically lifting presser foot Download PDFInfo
- Publication number
- CN109837660B CN109837660B CN201910143730.XA CN201910143730A CN109837660B CN 109837660 B CN109837660 B CN 109837660B CN 201910143730 A CN201910143730 A CN 201910143730A CN 109837660 B CN109837660 B CN 109837660B
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- trimming
- foot lifting
- presser foot
- driven pin
- connecting rod
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
-
- 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
- D05B69/10—Electrical or electromagnetic drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention belongs to the technical field of sewing machines, and particularly relates to a driving device for automatic thread trimming and automatic presser foot lifting, which has a simple structure and can ensure the stable operation of a sewing machine, and comprises a presser foot lifting transmission rod, a thread trimming transmission rod, a stepping motor, a cam body arranged on the stepping motor, a presser foot lifting connecting rod and a thread trimming connecting rod; the cam body is provided with a pressure raising and pressing pin driving cam surface and a trimming driving cam surface which both comprise a base circular surface and a lift curved surface; the other end of the pressure foot lifting connecting rod is hinged to one end of the pressure foot lifting transmission rod, and a first driven pin is arranged on the pressure foot lifting connecting rod; the other end of the thread trimming connecting rod is hinged with a thread trimming transmission rod, and a second driven pin is arranged on the thread trimming connecting rod; when the stepping motor drives the cam body clockwise for a certain angle, one driven pin enters the lift curved surface from the base circular surface, and the other driven pin slides on the base circular surface; when the cam is rotated anticlockwise, the other driven pin enters the lift curved surface from the base circular surface, and the one driven pin slides on the base circular surface.
Description
The application is a divisional application of 'a driving device for automatically cutting thread and automatically lifting presser foot' of application No. 2016106141869 and application No. 2016.07.30.
Technical Field
The invention belongs to the technical field of sewing machines, and particularly relates to a driving device for automatically trimming threads and automatically lifting a presser foot.
Background
The thread hooking rod used for trimming and the presser foot pull rod used for lifting the presser foot on the existing sewing machine are respectively controlled by two electromagnets, when trimming operation is needed, the thread hooking rod is controlled by one electromagnet to move back and forth, and when the presser foot is needed to be lifted, the presser foot pull rod is controlled by the other electromagnet to move back and forth. Because the electromagnet has a great difference between the speeds of the attraction and the springing-out, the thread hooking rod or the presser foot pull rod can often generate great sound and shake when moving back and forth, and further the stable work of the sewing machine can be influenced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the driving device for automatically trimming the thread and automatically lifting the presser foot, which has a simple structure and can ensure the stable operation of the sewing machine.
The purpose of the invention is realized as follows:
a driving device for automatic trimming and automatic presser foot lifting comprises a presser foot lifting transmission rod and a trimming transmission rod; the output shaft of the stepping motor is provided with a presser foot lifting driving mechanism and a thread trimming driving mechanism, and the output shaft drives a presser foot lifting driving cam surface of the presser foot lifting driving mechanism and a thread trimming driving cam surface of the thread trimming driving mechanism to move; one end of the pressure foot lifting transmission rod is hinged with a pressure foot lifting connecting rod, a first driven pin is arranged on the pressure foot lifting connecting rod, and the first driven pin slides along a pressure foot lifting driving cam surface; one end of the trimming transmission rod is hinged to the trimming connecting rod, a second driven pin is arranged on the trimming connecting rod, and the second driven pin slides along the trimming driving cam surface; the pressure raising and pressing foot driving cam surface and the thread cutting driving cam surface comprise a base circular surface and a lift curved surface; when the presser foot lifting transmission rod and the thread trimming transmission rod are both in the initial state, the two driven pins respectively abut against the corresponding base circular surfaces; when the stepping motor drives the cam body clockwise at a certain angle in an initial state, one driven pin enters the lift curved surface from the base circular surface, and the other driven pin slides on the base circular surface; when the stepping motor drives the cam body to have a certain angle anticlockwise in an initial state, the other driven pin enters the lift curved surface from the base circular surface, and the one driven pin slides on the base circular surface.
The invention is further configured to: the pressure raising and pressing foot driving cam surface and the trimming driving cam surface are respectively arranged on two end surfaces of the cam body, and the cam body is a disc-shaped cam.
The invention is further configured to: the trimming driving cam surface is an inward concave track groove.
The invention is further configured to: the lifting and pressing foot driving cam surface comprises a first base circle and a first lift curved surface, the first base circle and the cam body are concentrically arranged, and the first lift curved surface is eccentrically arranged outwards.
The invention is further configured to: the track groove comprises a second base circle and a second lift curved surface, the second base circle and the cam body are arranged concentrically, and the second lift curved surface protrudes towards the center of the inner cam body.
The invention is further configured to: the track groove further comprises a third lift curved surface extending towards the head end of the first base circle, and the third lift curved surface protrudes towards the periphery of the cam body.
The invention is further configured to: and a first stop part extending outwards is arranged at the joint of the first base circle and the first lift curved surface.
The invention is further configured to: the middle part of the pressure foot lifting connecting rod is movably provided with a first driven pin, one end of the first driven pin is provided with a rotatable first rotating wheel, and the first rotating wheel reciprocates along the outer peripheral wall of the pressure foot lifting driving cam surface.
The invention is further configured to: the trimming connecting rod is movably provided with a second driven pin, one end of the second driven pin is provided with a rotatable second rotating wheel, the second rotating wheel is matched with the track groove, and the second rotating wheel reciprocates along the inner wall of the track groove.
The invention is further configured to: the trimming connecting rod is in spherical sliding connection with the trimming transmission rod through a link rod.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that: two high-power electromagnets of traditional mode are replaced through a step motor, the structure of a driving device is reduced, a cam body is installed on an output shaft of the step motor and can simultaneously drive a thread trimming device and lift a presser foot device, so that the rotating speeds of a presser foot lifting driving cam surface and a thread trimming driving cam surface can be kept identical, the angular speed is fixed and is more reliable, meanwhile, a presser foot driving rod is lifted when a sewing machine operates, the force for popping and recovering the thread trimming driving rod is identical, so that the stability of the whole device is improved, and the shaking and noise of the whole device are reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of an explosive structure of the present invention;
FIG. 3 is a schematic view of a portion of the structure in one aspect of the present invention;
FIG. 4 is a partial schematic view of another aspect of the present invention;
FIG. 5 is a schematic view of the structure of the lift and presser foot drive cam surface of the present invention;
fig. 6 is a schematic structural view of the track groove of the present invention.
The reference numbers in the figures mean:
1-a shell; 2-lifting a presser foot transmission rod; 3-trimming transmission rod; 4-a stepper motor; 5-a cam body;
6-lifting the presser foot to drive the cam surface; 61-first base circle; 62-a first lift surface; 63-a first stop part;
7-a track groove; 71-second base circle; 72-second lift surface; 73-third lift surface;
8-lifting the presser foot connecting rod; 9-trimming connecting rod; 10-a first wheel; 11-a second wheel; 12-a link;
13-a first follower pin; 14-a second follower pin.
Detailed Description
The invention is further described in the following with specific embodiments in conjunction with the accompanying drawings:
the first embodiment is as follows:
referring to fig. 1 to 6, the driving device for automatic trimming and automatic presser foot lifting comprises a presser foot lifting transmission rod 2, a trimming transmission rod 3, a stepping motor 4, a cam body 5, a presser foot lifting connection rod 8 and a trimming connection rod 9, wherein the cam body 5 is arranged on an output shaft of the stepping motor 4; the cam body 5 is provided with a pressure lifting pin driving cam surface 6 and a thread cutting driving cam surface; one end of the presser foot lifting connecting rod 8 is hinged to the sewing machine shell 1, the other end of the presser foot lifting connecting rod 8 is hinged to one end of the presser foot lifting transmission rod 2, a first driven pin 13 is further arranged on the presser foot lifting connecting rod 8, and the first driven pin 13 slides along the presser foot lifting driving cam surface 6; one end of the thread trimming connecting rod 9 is hinged to the sewing machine shell 1, the other end of the thread trimming connecting rod 9 is hinged to the thread trimming transmission rod 3, a second driven pin 14 is further arranged on the thread trimming connecting rod 9, and the second driven pin 14 slides along the thread trimming driving cam surface; the pressure raising and pressing foot driving cam surface 6 and the thread cutting driving cam surface comprise a base circular surface and a lift curved surface; when the presser foot lifting transmission rod 2 and the thread trimming transmission rod 3 are both in the initial state, the two driven pins respectively abut against the corresponding base circular surfaces; when the stepping motor 4 drives the cam body 5 clockwise at a certain angle in an initial state, one driven pin enters a lift curved surface from a base circular surface, and the other driven pin slides on the base circular surface; when the stepping motor 4 drives the cam body 5 counterclockwise at an initial state for a certain angle, the other driven pin enters the lift curved surface from the base circular surface, one driven pin slides on the base circular surface, the stepping motor 4 replaces two high-power electromagnets in a traditional mode, the structure of the driving device is reduced, the cam body 5 is arranged on an output shaft of the stepping motor 4 and can drive the wire cutting device and the presser foot lifting device simultaneously, so that the stability of the whole device can be improved, and the shaking and noise of the whole device are reduced.
Further setting the following steps: the cam body 5 is a disc cam, one end face of the cam body 5 is provided with the pressure raising and pressing foot driving cam surface 6, and the other end face of the cam body 5 is provided with the trimming driving cam surface.
Further setting the following steps: the trimming driving cam surface is an inward concave track groove 7.
Further setting the following steps: the lifting and pressing foot driving cam surface 6 comprises a first base circle 61 and a first lift curved surface 62, the first base circle 61 is arranged concentrically with the cam body 5, and the first lift curved surface 62 is arranged eccentrically outwards.
Further setting the following steps: the track groove 7 includes a second base circle 71 and a second lift curved surface 72, the second base circle 71 is concentric with the cam body 5, and the second lift curved surface 72 protrudes toward the center of the cam body 5.
Further setting the following steps: track groove 7 still includes the third lift curved surface 73 to the extension of first base circle 61 head end, third lift curved surface 73 is to the periphery protrusion of cam body 5, and third lift curved surface 73 can play the guard action to trimming connecting rod 9's motion trail like this, and third lift curved surface 73 can play the cushioning effect to trimming connecting rod 9 behind second lift curved surface 72 at trimming connecting rod 9, avoids trimming connecting rod 9 trimming drive trimming transfer line 3 to move, has protected the trimming device.
Further setting the following steps: the connecting part of the first base circle 61 and the first lift curved surface 62 is provided with a first stop part 63 extending outwards, and the first stop part 63 can limit the rotation of the cam body 5, so that the damage to the presser foot lifting device caused by the overlarge rotation of the cam body 5 is avoided.
Further setting the following steps: a first driven pin 13 is movably arranged in the middle of the pressure foot lifting connecting rod 8, a rotatable first rotating wheel 10 is arranged at one end of the first driven pin 13, and the first rotating wheel 10 reciprocates along the outer peripheral wall of the pressure foot lifting driving cam surface 6.
Further setting the following steps: a second driven pin 14 is movably arranged on the trimming connecting rod 9, a rotatable second rotating wheel 11 is arranged at one end of the second driven pin 14, the second rotating wheel 11 is matched with the track groove 7, and the second rotating wheel 11 reciprocates along the inner wall of the track groove 7.
Further setting the following steps: the trimming connecting rod 9 is in spherical sliding connection with the trimming transmission rod 3 through a connecting rod 12.
The rotation speed of the pressure foot lifting driving cam surface 6 on the cam body 5 and the rotation speed of the track groove 7 can be kept to be completely the same, the angular speed is fixed and is unchanged, the positioning is more reliable, and meanwhile, the force for popping up and recovering the pressure foot lifting transmission rod 2 and the thread trimming transmission rod 3 is the same when the sewing machine operates, so that the stability of the whole device can be improved, and the shaking and noise of the whole device are reduced.
The sewing machine is divided into two actions: trimming and lifting the presser foot.
When the presser foot lifting drive cam surface 6 is mounted toward the outside of the stepping motor 4:
when the stepping motor 4 rotates reversely, the first rotating wheel 10 moves along the outer peripheral wall of the first base circle 61 on the presser foot lifting driving cam surface 6, and the first rotating wheel 10 does not drive the presser foot lifting connecting rod 8 to move and the presser foot lifting is not operated because the first arc is concentrically arranged with the cam body 5; the second runner 11 in the track groove 7 on the other side of the cam body 5 enters the second lift curved surface 72 along the second base circle 71, and the running track of the second runner 11 changes, so that the distance between the second runner 11 and the center of the cam body 5 is shortened, and one end of the trimming connecting rod 9 is driven to drive the connecting rod 12, and the connecting rod 12 drives the trimming transmission rod 3 to drive the trimming device to perform trimming;
when the stepping motor 4 rotates forwards, the second rotating wheel 11 runs along a second arc, the pressure raising foot drives the outer peripheral wall of the first base circle 61 on the cam surface 6 to move, and the second arc is concentric with the cam body 5, so that the second rotating wheel 11 does not drive the wire shearing connecting rod 9 to move, and the wire shearing device does not act; the first rotating wheel 10 enters the first lift curved surface 62 along the first base circle 61, and the running track of the first rotating wheel 10 changes, so that the distance between the first rotating wheel 10 and the center of the cam body 5 is lengthened, and one end of the presser foot lifting connecting rod 8 is driven to drive the presser foot lifting transmission rod 2 to drive the presser foot lifting device to lift the presser foot.
When the presser foot lifting drive cam surface 6 is mounted toward the inside of the stepping motor 4: when the stepping motor 4 rotates forwards, the presser foot is lifted without action, and the thread shearing device produces thread shearing action; when the stepping motor 4 rotates reversely, the thread cutting device does not act, and the presser foot lifting device lifts the presser foot.
Example two:
the present embodiment is basically the same as the first embodiment, and the difference is: the presser foot lifting driving cam surface 6 and the thread cutting driving cam surface are independently arranged, namely the presser foot lifting driving mechanism and the thread cutting driving mechanism independently control the presser foot lifting and the thread cutting of the sewing machine.
In addition, the relative installation positions of the driving cam surfaces and the driven pins in the presser foot lifting driving mechanism and the thread trimming driving mechanism can be interchanged, such as: the trimming connecting rod 9 is provided with a trimming driving cam surface which is an inward concave track groove 7; an output shaft of the stepping motor 4 is provided with a second driven pin 14, one end of the second driven pin 14 is provided with a rotatable second rotating wheel 11, the second rotating wheel 11 is matched with the track groove 7, and the second rotating wheel 11 reciprocates along the inner wall of the track groove 7.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (5)
1. A driving device for automatic trimming and automatic presser foot lifting comprises a presser foot lifting transmission rod and a trimming transmission rod; the method is characterized in that: the output shaft of the stepping motor is provided with a presser foot lifting driving mechanism and a thread trimming driving mechanism, and the output shaft drives a presser foot lifting driving cam surface of the presser foot lifting driving mechanism and a thread trimming driving cam surface of the thread trimming driving mechanism to move; one end of the pressure foot lifting transmission rod is hinged with a pressure foot lifting connecting rod, a first driven pin is arranged on the pressure foot lifting connecting rod, and the first driven pin slides along a pressure foot lifting driving cam surface; one end of the trimming transmission rod is hinged to the trimming connecting rod, a second driven pin is arranged on the trimming connecting rod, and the second driven pin slides along the trimming driving cam surface; the pressure raising and pressing foot driving cam surface and the thread cutting driving cam surface comprise a base circular surface and a lift curved surface; when the presser foot lifting transmission rod and the thread trimming transmission rod are both in the initial state, the two driven pins respectively abut against the corresponding base circular surfaces; when the stepping motor drives the cam body clockwise at a certain angle in an initial state, one driven pin enters the lift curved surface from the base circular surface, and the other driven pin slides on the base circular surface; when the stepping motor drives the cam body to have a certain angle anticlockwise in an initial state, the other driven pin enters the lift curved surface from the base circular surface, and the one driven pin slides on the base circular surface;
the lifting and pressing foot driving cam surface comprises a first base circle and a first lift curved surface, and a first stop part extending outwards is arranged at the joint of the first base circle and the first lift curved surface; the trimming driving cam surface is an inward concave track groove, the track groove comprises a second base circle, a second lift curved surface and a third lift curved surface extending to the head end of the second base circle, the third lift curved surface protrudes towards the periphery of the cam body, and a stop part II is formed at the joint of the second base circle and the third lift curved surface;
the first base circle and the cam body are arranged concentrically, and the first lift curved surface is arranged eccentrically outwards;
the second base circle and the cam body are arranged concentrically, and the second lift curve protrudes towards the center of the inner cam body;
the first stop part/the stop part limits the rotation of the cam body.
2. The driving device for automatic thread trimming and presser foot lifting according to claim 1, wherein: the pressure raising and pressing foot driving cam surface and the trimming driving cam surface are respectively arranged on two end surfaces of the cam body, and the cam body is a disc-shaped cam.
3. The driving device for automatic thread trimming and presser foot lifting according to claim 1, wherein: the middle part of the pressure foot lifting connecting rod is movably provided with a first driven pin, one end of the first driven pin is provided with a rotatable first rotating wheel, and the first rotating wheel reciprocates along the outer peripheral wall of the pressure foot lifting driving cam surface.
4. The driving device for automatic thread trimming and presser foot lifting according to claim 1, wherein: the trimming connecting rod is movably provided with a second driven pin, one end of the second driven pin is provided with a rotatable second rotating wheel, the second rotating wheel is matched with the track groove, and the second rotating wheel reciprocates along the inner wall of the track groove.
5. The driving device for automatic thread trimming and presser foot lifting according to claim 1, wherein: the trimming connecting rod is in spherical sliding connection with the trimming transmission rod through a link rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143730.XA CN109837660B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143730.XA CN109837660B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
| CN201610614186.9A CN106012323B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610614186.9A Division CN106012323B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109837660A CN109837660A (en) | 2019-06-04 |
| CN109837660B true CN109837660B (en) | 2021-06-18 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910138764.XA Active CN109680415B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatic thread trimming and automatic presser foot lifting |
| CN201910143730.XA Active CN109837660B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
| CN201610614186.9A Active CN106012323B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910138764.XA Active CN109680415B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatic thread trimming and automatic presser foot lifting |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610614186.9A Active CN106012323B (en) | 2016-07-30 | 2016-07-30 | Driving device for automatically trimming and automatically lifting presser foot |
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| CN (3) | CN109680415B (en) |
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| CN106400340A (en) * | 2016-11-28 | 2017-02-15 | 浙江美机缝纫机有限公司 | Sewing machine starting and presser foot lifting mechanism |
| CN108118469B (en) * | 2016-11-29 | 2020-06-12 | 拓卡奔马机电科技有限公司 | Buttonhole sewing machine |
| CN108118450B (en) * | 2016-11-29 | 2020-06-09 | 拓卡奔马机电科技有限公司 | Buttonhole sewing machine |
| CN106637735B (en) * | 2016-12-07 | 2020-01-31 | 杰克缝纫机股份有限公司 | Thread trimming and presser foot lifting mechanism and sewing machine |
| CN106757831B (en) * | 2016-12-20 | 2019-03-05 | 石狮市伟马智能科技有限公司 | Neckline sewing machine |
| CN107190429B (en) * | 2017-05-10 | 2020-01-14 | 杰克缝纫机股份有限公司 | Sewing machine trimming and presser foot lifting device and sewing machine |
| CN109023736B (en) * | 2018-09-29 | 2023-12-01 | 浙江美机缝纫机有限公司 | Automatic presser foot lifting and wire bonding mechanism and sewing machine |
| CN109537194B (en) * | 2018-11-30 | 2023-10-27 | 浙江翔科缝纫机股份有限公司 | Sewing machine and automatic presser foot lifting and thread cutting control method |
| CN111501222B (en) * | 2019-01-31 | 2021-12-21 | 浙江杰克智能缝制科技有限公司 | Thread trimming and stitch length adjusting device of sewing machine and sewing machine |
| CN109554849A (en) * | 2019-02-02 | 2019-04-02 | 叶朋成 | A kind of automatic shearing of flat seam machine and the synchronization mechanism of automatic needle-foot-lifting |
| CN110468506A (en) * | 2019-07-26 | 2019-11-19 | 上海鲍麦克斯电子科技有限公司 | A kind of control system of full-automatic flat seaming machine |
| CN112391745B (en) * | 2019-08-17 | 2022-09-09 | 杰克科技股份有限公司 | Presser foot lifting and trimming driving structure of sewing machine and control method thereof |
| CN110528184A (en) * | 2019-10-16 | 2019-12-03 | 浙江美机缝纫机有限公司 | The thread-trimming lifter-presser foot mechanism of sewing machine |
| CN110878450B (en) * | 2019-12-23 | 2021-11-02 | 杰克缝纫机股份有限公司 | Sewing machine trimming lifting presser foot and presser foot pressure adjusting device and sewing machine |
| CN114150446A (en) * | 2020-09-07 | 2022-03-08 | 杰克科技股份有限公司 | Sewing machine trimming and presser foot lifting device and sewing machine |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109680415A (en) | 2019-04-26 |
| CN106012323B (en) | 2020-10-09 |
| CN109680415B (en) | 2021-11-16 |
| CN109837660A (en) | 2019-06-04 |
| CN106012323A (en) | 2016-10-12 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A driving device for automatic thread cutting and automatic presser foot lifting Effective date of registration: 20210913 Granted publication date: 20210618 Pledgee: Zhejiang Tailong commercial bank Taizhou branch of Limited by Share Ltd. Pledgor: ZHEJIANG DUMA SEWING MACHINE Co.,Ltd. Registration number: Y2021330001536 |