CN109402886B - Thread cutting and presser foot lifting driving device of sewing machine - Google Patents
Thread cutting and presser foot lifting driving device of sewing machine Download PDFInfo
- Publication number
- CN109402886B CN109402886B CN201811348192.XA CN201811348192A CN109402886B CN 109402886 B CN109402886 B CN 109402886B CN 201811348192 A CN201811348192 A CN 201811348192A CN 109402886 B CN109402886 B CN 109402886B
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- Prior art keywords
- crank
- cam
- presser foot
- sewing machine
- horizontal groove
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Classifications
-
- 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
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
-
- 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 utility model relates to a sewing machine thread cutting and presser foot lifting driving device, which comprises a sewing machine base, a sewing machine main body, a driving motor, a thread cutting mechanism and a presser foot lifting mechanism, wherein the driving motor is longitudinally arranged on the sewing machine base, a cam is fixed on an output shaft of the driving motor, an axial driving groove is formed in the periphery of the cam, and the thread cutting mechanism is connected with the cam through a first horizontal shaft and a first crank; the presser foot lifting mechanism is connected with the cam through the transmission mechanism, the second horizontal shaft and the second crank; compared with the prior art, the utility model only adopts one motor and one output cam, the structure is more compact, the installation is more convenient, and the motor adopts a sealed box body which is longitudinally provided with the output cam and the wire cutting mechanism and the presser foot lifting mechanism and is connected with one other for lubrication, thereby having the characteristics of silence, lubrication and durability.
Description
Technical Field
The utility model relates to the sewing machine technology, in particular to a thread cutting and presser foot lifting driving device of a sewing machine.
Background
The thread cutting and presser foot lifting drive of the existing sewing machine consists of two parts, wherein one part is lower thread cutting drive, and a cylinder or an electromagnet is generally adopted to drive a lower thread cutting device to cut threads; the other part is the presser foot lifting drive, a small cylinder or a small electromagnet is generally adopted to drive the presser foot lifting device to act, and the existing two sets of drive devices have the disadvantages of high cost, large occupied space, large noise, high installation working time and inconvenience in installation.
For this purpose, a driving device is designed to realize two sets of driving mechanisms, such as the following bulletin numbers: CN104878529a discloses a driving device for thread cutting and presser foot lifting of a sewing machine, which solves the technical problems that the existing driving device for thread cutting and presser foot lifting requires two sets of driving devices to finish thread cutting, thread loosening and presser foot lifting actions, and has high cost, large occupied space, high installation time and difficult installation; the wire cutting and presser foot lifting driving device comprises a stepping motor, a shifting fork mechanism and a cam, wherein the shifting fork mechanism comprises a shifting rod, a fork rod, a sliding rod and at least two fixing rings, one end of the shifting rod and the cam are fixed on a main shaft of the stepping motor, the other end of the shifting rod can extend into the fork rod and shift the fork rod to move, the fork rod is fixed on the sliding rod, and the sliding rod is positioned in two fixing rings and can slide in the fixing rings; the motion track of the cam and the free end of the presser foot lifting connecting rod of the sewing machine are provided with an intersection point; the shifting fork mechanism drives the lower thread cutting device and the thread loosening device to realize the actions of thread cutting, thread clamping and thread loosening, and the cam is used for realizing the action of lifting the presser foot.
Another example is the bulletin number: CN207031720U discloses a single driving device for thread cutting and presser foot lifting of a sewing machine, which comprises a stepping motor, a presser foot lifting device, a first main shaft connected with the presser foot lifting device, a thread cutting device and a second main shaft connected with the thread cutting device, wherein the first main shaft is connected with the presser foot lifting device through a linkage rod assembly, and an output shaft of the stepping motor is provided with a crank mechanism of the presser foot lifting device connected with the first main shaft and a crank mechanism of the thread cutting device connected with the second main shaft; according to the utility model, the crank mechanism drives the presser foot lifting device and the thread cutting device to realize thread cutting and lifting, so that the structure is simpler, and the thread cutting speed is more stable.
According to the two thread trimming and presser foot lifting mechanisms, the thread trimming device and the presser foot lifting device are driven by the single-drive motor through the shifting fork mechanism and one cam or the single-drive motor through the presser foot lifting device crank and the thread trimming device crank respectively, and the structure is characterized in that the motor is transversely arranged, and an electric output cam or a curved groove is not lubricated by a lubricating system, so that dust and impurities can be accumulated after the structure is used for a period of time, the abrasion of parts can be serious, and therefore, the travel gap is increased, the noise is increased, and the service life is influenced; in addition, although a single-drive motor is adopted, a cam and shifting fork mechanism with power output or a crank of a presser foot lifting device and a crank of a thread cutting device are also two sets of parts, the structure is not simple enough, and the device occupies a large space when being arranged on a base of a sewing machine and also affects the layout of other mechanisms.
Disclosure of Invention
The utility model aims to provide a thread cutting and presser foot lifting driving device of a sewing machine, which is characterized in that a motor and a cam are used for driving a thread cutting mechanism and a presser foot lifting mechanism.
The following technical scheme is adopted for realizing the purposes:
the utility model provides a sewing machine cuts line and lifts presser foot drive arrangement, includes sewing machine base, sewing machine main part, driving motor, cuts line mechanism and lifts presser foot mechanism, its characterized in that: the driving motor is arranged on the sewing machine base, a cam is fixed on an output shaft of the driving motor, an axial driving groove is formed in the periphery of the cam, and a thread cutting mechanism on the sewing machine base is connected with the cam through a first horizontal shaft and a first crank; the presser foot lifting mechanism on the sewing machine body is connected with the cam through the transmission mechanism, the second horizontal shaft and the second crank; the input ends of the first crank and the second crank are matched with a driving groove at the periphery of the cam, and the driving motor drives the thread cutting mechanism or the presser foot lifting mechanism to work through the rotation of the cam.
The sewing machine comprises a sewing machine base, a first horizontal shaft, a second horizontal shaft, a cam, a bottom plate, a driving motor, a cam, a sealing space, lubricating grease, a driving motor and a cam, wherein the driving motor is provided with a cavity with an opening at the bottom, the first horizontal shaft and the second horizontal shaft penetrate into the cavity from the outer side of the cavity, the cam is accommodated in the cavity, the bottom opening of the cavity is sealed to form the sealing space by the bottom plate, the cavity is filled with lubricating grease, and an output shaft of the driving motor penetrates through the bottom plate to be connected with the cam.
The driving motor is longitudinally and vertically fixed on the bottom plate, and the first crank and the second crank are distributed on two sides of the cam.
The driving groove comprises an upper horizontal groove and a lower horizontal groove, the upper horizontal groove and the lower horizontal groove are communicated through a chute, the input end of the first crank is accommodated in the upper horizontal groove, the input end of the second crank is accommodated in the lower horizontal groove, and when the cam rotates to the state that the input end of the first crank corresponds to the chute, the wire cutting mechanism works; when the cam rotates to the position that the input end of the second crank corresponds to the chute, the presser foot lifting mechanism works.
The driving groove comprises a thread cutting horizontal groove and a thread lifting foot pressing horizontal groove, one ends of the thread cutting horizontal groove and the thread lifting foot pressing horizontal groove are respectively provided with a chute, the input end of the first crank is accommodated in the thread cutting horizontal groove, the input end of the second crank is accommodated in the thread lifting foot pressing horizontal groove, and when the cam rotates to the position that the input end of the first crank corresponds to the chute at the end part of the thread cutting horizontal groove, the thread cutting mechanism works; when the cam rotates to the position that the input end of the second crank corresponds to the chute at the end part of the presser foot lifting horizontal groove, the presser foot lifting mechanism works.
The input ends of the first crank and the second crank are positioned at the chute position at the same time.
The input end of the first crank and the second crank is sleeved with a bearing, and the bearing is accommodated in the driving groove.
Compared with the prior art, the utility model outputs the power of the motor skillfully through the axial direction of the driving groove instead of the conventional radial direction, only one input end of the first crank and the second crank is positioned at the chute position at the same time, and the driving groove is arranged on the cam through the horizontal groove and the chute to separate the first crank from the second crank when the cam rotates; when the cam rotates positively, the input end of the second crank is always positioned in the horizontal groove, the presser foot lifting mechanism does not work, and when the cam rotates until the input end of the first crank corresponds to the chute, the thread cutting mechanism works; otherwise, when the cam is reversed, the input end of the first crank is always positioned in the horizontal groove, the thread cutting mechanism cannot work, and when the cam rotates to the state that the input end of the second crank corresponds to the chute, the presser foot lifting mechanism works.
Compared with the prior art, the utility model can complete the work of trimming and lifting the presser foot by adopting one cam, the structure is more compact, and the driving motor can adopt the structure of axial output of the cam, so that the cam and the crank can be placed in a sealed small chamber filled with lubricating grease by adopting longitudinal arrangement, and the cam and the crank are in sealed and lubricated environments, thus the utility model has the characteristics of silence, lubrication and durability.
Drawings
FIG. 1 is a schematic view of the sewing machine of the present utility model;
FIG. 2 is a schematic view of the structure of the bottom of the sewing machine of the present utility model;
FIG. 3 is a schematic view of the structure of the sewing machine of the present utility model with the bottom plate and drive motor removed;
FIG. 4 is a schematic view of the structure of the bottom chamber of the sewing machine of the present utility model;
FIG. 5 is a schematic view of the drive and transmission mechanism of the present utility model;
fig. 6 is a schematic view of the drive and transmission mechanism of the present utility model in another orientation.
Detailed Description
1-6, a sewing machine thread cutting and presser foot lifting driving device comprises a sewing machine base 1, a sewing machine main body 2, a driving motor 3, a thread cutting mechanism 4 and a presser foot lifting mechanism 5, wherein the driving motor 3 is arranged on the sewing machine base 1, a cavity 11 with an opening at the bottom is arranged at the position of the driving motor 3 corresponding to the sewing machine base 1, a cam 31 is fixed on an output shaft of the driving motor 3, the cam 31 is accommodated in the cavity 11, a bottom plate 12 seals the opening at the bottom of the cavity 11 to form a closed space, lubricating grease is filled in the cavity 11, and an output shaft of the driving motor 3 penetrates through the bottom plate 12 to be connected with the cam 31; the driving motor 3 is vertically and longitudinally fixed on the bottom plate 12, an axial driving groove 32 is formed in the periphery of the cam 31, the driving groove 32 comprises an upper horizontal groove 321 and a lower horizontal groove 322, the upper horizontal groove and the lower horizontal groove are communicated through a chute 323, and a thread cutting mechanism 4 on the sewing machine base 1 is connected with the cam 31 through a first horizontal shaft 41 and a first crank 42; the presser foot lifting mechanism 5 on the sewing machine body 2 is connected with the cam 31 through a transmission mechanism 51, a second horizontal shaft 52 and a second crank 53; the input ends 53 of the first crank 42 and the second crank are matched with the driving groove 32 at the periphery of the cam 31; the two sides of the first horizontal shaft 41 and the second horizontal shaft 52 penetrate from the outside of the chamber to the inside of the chamber 11, and the first crank 42 and the second crank 53 are distributed on the two sides of the cam 31; bearings are sleeved at the input ends of the first crank 42 and the second crank 53, and the bearings are accommodated in the driving groove 32; the input end of the first crank 42 is accommodated in the upper horizontal groove 321, the input end of the second crank 53 is accommodated in the lower horizontal groove 322, and only one input end of the first crank 42 and one input end of the second crank 53 are positioned at the chute 323 at the same time; when the cam 31 rotates to the input end of the first crank corresponding to the chute 323, the thread cutting mechanism 4 works; when the cam 31 rotates until the input end of the second crank corresponds to the chute 323, the presser foot lifting mechanism 5 operates.
Compared with the prior art, the utility model outputs the power of the motor skillfully through the axial direction of the driving groove instead of the conventional radial direction, only one input end of the first crank and the second crank is positioned at the chute position at the same time, and the driving groove is arranged through the horizontal groove and the chute to separate the first crank from the second crank when the cam rotates; when the cam rotates positively, the input end of the second crank is always positioned in the horizontal groove, the presser foot lifting mechanism does not work, and when the cam rotates until the input end of the first crank corresponds to the chute, the thread cutting mechanism works; otherwise, when the cam is reversed, the input end of the first crank is always positioned in the horizontal groove, the thread cutting mechanism cannot work, and when the cam rotates to the state that the input end of the second crank corresponds to the chute, the presser foot lifting mechanism works.
Compared with the prior art, the utility model can complete the work of trimming and lifting the presser foot by adopting one cam, the structure is more compact, and the driving motor can adopt the structure of axial output of the cam, so that the cam and the crank can be placed in a sealed small chamber filled with lubricating grease by adopting longitudinal arrangement, and the cam and the crank are in a sealed and lubricated environment, thus the utility model has the characteristics of dust prevention, silence, lubrication and durability.
In addition, the driving grooves are not connected with the upper water groove and the lower water groove through the chute, and two independent driving grooves can be adopted, wherein the driving grooves comprise a line cutting horizontal groove and a presser foot lifting horizontal groove, one ends of the line cutting horizontal groove and the presser foot lifting horizontal groove are respectively provided with a chute, and only one input end of the first crank 42 and one input end of the second crank 53 are positioned at the chute 323 at the same time; the input end of the first crank is accommodated in the thread cutting horizontal groove, the input end of the second crank is accommodated in the presser foot lifting horizontal groove, and when the cam rotates to the state that the input end of the first crank corresponds to the chute at the end part of the thread cutting horizontal groove, the thread cutting mechanism works; when the cam rotates to the position that the input end of the second crank corresponds to the chute at the end part of the presser foot lifting horizontal groove, the presser foot lifting mechanism works.
Claims (4)
1. The utility model provides a sewing machine cuts line and lifts presser foot drive arrangement, includes sewing machine base (1), sewing machine main part (2), driving motor (3), cuts line mechanism (4) and lifts presser foot mechanism (5), its characterized in that: the driving motor (3) is arranged on the sewing machine base (1), a cam (31) is fixed on an output shaft of the driving motor (3), an axial driving groove (32) is formed in the periphery of the cam (31), and a thread cutting mechanism (4) on the sewing machine base (1) is connected with the cam (31) through a first horizontal shaft (41) and a first crank (42); the presser foot lifting mechanism (5) on the sewing machine body (2) is connected with the cam (31) through the transmission mechanism (51), the second horizontal shaft (52) and the second crank (53); the input ends of the first crank (42) and the second crank (53) are matched with the driving groove (32) at the periphery of the cam (31), and only one input end of the first crank (42) and the input end of the second crank (53) are positioned at the position of the chute (323) at the same time;
the driving groove (32) comprises an upper horizontal groove (321) and a lower horizontal groove (322), the upper horizontal groove and the lower horizontal groove are communicated through a chute (323), the input end of the first crank (42) is contained in the upper horizontal groove (321), the input end of the second crank (53) is contained in the lower horizontal groove (322), and when the cam (31) rotates to the state that the input end of the first crank corresponds to the chute (323), the wire cutting mechanism (4) works; when the cam (31) rotates to the position that the input end of the second crank corresponds to the chute (323), the presser foot lifting mechanism (5) works; or the driving groove comprises a thread cutting horizontal groove and a thread lifting presser foot horizontal groove, one ends of the thread cutting horizontal groove and the thread lifting presser foot horizontal groove are respectively provided with a chute, the input end of the first crank is accommodated in the thread cutting horizontal groove, the input end of the second crank is accommodated in the thread lifting presser foot horizontal groove, and when the cam rotates to the state that the input end of the first crank corresponds to the chute at the end part of the thread cutting horizontal groove, the thread cutting mechanism works; when the cam rotates to the position that the input end of the second crank corresponds to the chute at the end part of the horizontal groove of the presser foot lifting mechanism, the presser foot lifting mechanism works;
the driving motor (3) rotates through the cam (31) to drive the thread cutting mechanism (4) or the presser foot lifting mechanism (5) to work.
2. A sewing machine thread trimming and presser foot lifting drive as recited in claim 1, wherein: the sewing machine is characterized in that a cavity (11) with an opening at the bottom is arranged at the position of a driving motor (3) corresponding to the sewing machine base (1), two sides of a first horizontal shaft (41) and a second horizontal shaft (52) penetrate into the cavity (11) from the outside of the cavity, a cam (31) is accommodated in the cavity (11), a bottom plate (12) seals the opening at the bottom of the cavity (11) to form a closed space, lubricating grease is filled in the cavity (11), and an output shaft of the driving motor (3) penetrates through the bottom plate (12) to be connected with the cam (31).
3. A sewing machine thread cutting and presser foot lifting drive as recited in claim 2, wherein: the driving motor (3) is longitudinally and vertically fixed on the bottom plate (12), and the first crank (42) and the second crank (53) are distributed on two sides of the cam (31).
4. A sewing machine thread trimming and presser foot lifting drive as recited in claim 1, wherein: the input ends of the first crank (42) and the second crank (53) are sleeved with bearings, and the bearings are accommodated in the driving groove (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348192.XA CN109402886B (en) | 2018-11-13 | 2018-11-13 | Thread cutting and presser foot lifting driving device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348192.XA CN109402886B (en) | 2018-11-13 | 2018-11-13 | Thread cutting and presser foot lifting driving device of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109402886A CN109402886A (en) | 2019-03-01 |
| CN109402886B true CN109402886B (en) | 2023-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811348192.XA Active CN109402886B (en) | 2018-11-13 | 2018-11-13 | Thread cutting and presser foot lifting driving device of sewing machine |
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| Country | Link |
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| CN (1) | CN109402886B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110923967B (en) * | 2019-12-23 | 2021-12-14 | 浙江杰克智能缝制科技有限公司 | Sewing machine trimming and thread loosening pressure foot lifting device and sewing machine |
| WO2023230847A1 (en) * | 2022-05-31 | 2023-12-07 | 安徽杰羽制鞋机械科技有限公司 | Stepping thread-cutting and presser foot-lifting device of sewing machine |
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| US3314387A (en) * | 1964-04-03 | 1967-04-18 | American Mach & Foundry | Button stitching machine and method of stitching |
| JP2003326064A (en) * | 2002-05-14 | 2003-11-18 | Juki Corp | Sewing machine |
| TW200530454A (en) * | 2004-03-11 | 2005-09-16 | Wu-Xiong Zhang | Full-coverage sewing machine belt protection shield |
| CN1757812A (en) * | 2004-10-08 | 2006-04-12 | 重机公司 | Sewing machine |
| CN102345476A (en) * | 2010-08-02 | 2012-02-08 | 谢夫勒科技有限两合公司 | Valve train of internal combustion engine |
| CN202989509U (en) * | 2013-01-06 | 2013-06-12 | 黄雄景 | Transmission component of tag labeling machine with tag stitches easy to take out |
| CN205205421U (en) * | 2015-12-21 | 2016-05-04 | 张宗尚 | Package machine crochet hook swinging cam mechanism |
| CN207031720U (en) * | 2017-08-04 | 2018-02-23 | 浙江乐江机械有限公司 | A kind of sewing machine thread-trimming lifter-presser foot list drive device |
| CN209292652U (en) * | 2018-11-13 | 2019-08-23 | 浙江川田缝纫机有限公司 | A kind of sewing machine trimming and presser foot lifter driving device |
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2018
- 2018-11-13 CN CN201811348192.XA patent/CN109402886B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3314387A (en) * | 1964-04-03 | 1967-04-18 | American Mach & Foundry | Button stitching machine and method of stitching |
| JP2003326064A (en) * | 2002-05-14 | 2003-11-18 | Juki Corp | Sewing machine |
| TW200530454A (en) * | 2004-03-11 | 2005-09-16 | Wu-Xiong Zhang | Full-coverage sewing machine belt protection shield |
| CN1757812A (en) * | 2004-10-08 | 2006-04-12 | 重机公司 | Sewing machine |
| CN102345476A (en) * | 2010-08-02 | 2012-02-08 | 谢夫勒科技有限两合公司 | Valve train of internal combustion engine |
| CN202989509U (en) * | 2013-01-06 | 2013-06-12 | 黄雄景 | Transmission component of tag labeling machine with tag stitches easy to take out |
| CN205205421U (en) * | 2015-12-21 | 2016-05-04 | 张宗尚 | Package machine crochet hook swinging cam mechanism |
| CN207031720U (en) * | 2017-08-04 | 2018-02-23 | 浙江乐江机械有限公司 | A kind of sewing machine thread-trimming lifter-presser foot list drive device |
| CN209292652U (en) * | 2018-11-13 | 2019-08-23 | 浙江川田缝纫机有限公司 | A kind of sewing machine trimming and presser foot lifter driving device |
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| CN109402886A (en) | 2019-03-01 |
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