CN113493964B - Upper front-back driving mechanism for upper feeding teeth in sewing machine and sewing machine - Google Patents
Upper front-back driving mechanism for upper feeding teeth in sewing machine and sewing machine Download PDFInfo
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- CN113493964B CN113493964B CN202010266798.XA CN202010266798A CN113493964B CN 113493964 B CN113493964 B CN 113493964B CN 202010266798 A CN202010266798 A CN 202010266798A CN 113493964 B CN113493964 B CN 113493964B
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- Prior art keywords
- cloth feeding
- shaft
- driving mechanism
- feeding shaft
- adjusting
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
- D05B27/04—Work-feeding means with feed dogs having horizontal and vertical movements arranged above the workpieces
Abstract
The invention provides an upper front-back driving mechanism for an upper feed dog in a sewing machine, which comprises a main shaft, an upper cloth feeding shaft, an upper dog frame connected with the upper cloth feeding shaft, an upper feed dog fixed on the upper dog frame, a lower cloth feeding shaft in the lower front-back driving mechanism, and a front-back transmission unit, wherein the main shaft, the upper cloth feeding shaft and the lower cloth feeding shaft are parallel, and the lower cloth feeding shaft is connected with the upper cloth feeding shaft through the front-back transmission unit and drives the upper cloth feeding shaft to swing. The upper front-rear driving mechanism is driven by the lower cloth feeding shaft in the front-rear driving mechanism to move, so that only a front-rear transmission unit needs to be arranged between the lower cloth feeding shaft and the upper cloth feeding shaft, and compared with the prior art, an intermediate transmission shaft and a corresponding transmission unit which are arranged between the main shaft and the upper cloth feeding shaft are omitted, so that the structure and the transmission chain of the upper front-rear driving mechanism are simplified, the number of parts is reduced, and the cost is reduced.
Description
Technical Field
The invention relates to the field of sewing machines, in particular to an upper front-back driving mechanism for an upper feeding tooth in a sewing machine.
Background
The overlock machine is a type of industrial sewing machine; in general, as shown in fig. 1, the overedger has a rotatable main shaft 1, a lower feed dog 2 located on the lower side of a needle plate, a lower front-rear driving mechanism connected between the main shaft 1 and the lower feed dog 2 and driving the lower feed dog 2 to reciprocate back and forth, and a lower feed dog driving mechanism connected between the main shaft 1 and the lower feed dog 2 and driving the lower feed dog 2 to reciprocate up and down, so that the lower feed dog 2 makes a combined motion of reciprocating back and forth and reciprocating up and down, the motion trajectory of which is similar to an ellipse. Further, in order to improve the cloth feeding quality, some overedgers are provided with an upper feed dog 3 located above the needle plate, and therefore, an upper front and rear driving mechanism for driving the upper feed dog 3 to reciprocate back and forth and an upper feed dog driving mechanism for driving the upper feed dog 3 to reciprocate up and down are also required to be arranged, so that the upper feed dog 3 also makes a combined motion of the front and rear reciprocating motion and the up and down reciprocating motion, and the motion track of the upper feed dog is similar to an ellipse.
In the overedger of the prior art, as shown in fig. 1, the driving force of the upper front-rear driving mechanism comes from a main shaft 1, and the upper front-rear driving mechanism and the lower front-rear driving mechanism are independent; specifically, the upper front-rear driving mechanism comprises a middle transmission shaft 4 parallel to the main shaft 1, an upper cloth feeding shaft 5 parallel to the main shaft 1, a first transmission assembly connected between the main shaft 1 and the middle transmission shaft 4, a second transmission assembly connected between the middle transmission shaft 4 and the upper cloth feeding shaft 5, and an upper tooth frame 6 connected with the upper cloth feeding shaft 5. When the main shaft 1 rotates, the main shaft 1 drives the middle transmission shaft 4 to swing through the first transmission assembly, the middle transmission shaft 4 drives the upper cloth feeding shaft 5 to swing through the second transmission assembly, and then the upper tooth frame 6 and the upper tooth feeding 3 are driven to reciprocate back and forth. However, the upper front-rear driving mechanism is provided with the necessary upper cloth feeding shaft 5 and the intermediate transmission shaft 4, and further a first transmission assembly is required to be additionally arranged, so that the conventional upper front-rear driving mechanism is complex in overall structure, more in parts and complex in transmission.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide an upper front and rear driving mechanism for an upper feed dog in a sewing machine, which is driven by a lower feed shaft in a lower front and rear driving mechanism, thereby simplifying the structure.
In order to achieve the purpose, the invention provides an upper front-back driving mechanism for an upper feed dog in a sewing machine, which comprises a main shaft, an upper cloth feeding shaft, an upper dog frame connected with the upper cloth feeding shaft, an upper feed dog fixed on the upper dog frame, a lower cloth feeding shaft in a lower front-back driving mechanism, and a front-back transmission unit, wherein the main shaft, the upper cloth feeding shaft and the lower cloth feeding shaft are parallel, and the lower cloth feeding shaft is connected with the upper cloth feeding shaft through the front-back transmission unit and drives the upper cloth feeding shaft to swing.
Further, the front and rear transmission unit comprises a first crank with a first chute, a first sliding block arranged in the first chute and in sliding fit with the first chute, an upper cloth feeding connecting rod and a second crank, the first crank is fixed on the lower cloth feeding shaft, the first sliding block is hinged to one end of the upper cloth feeding connecting rod, the other end of the upper cloth feeding connecting rod is hinged to the second crank, and the second crank is fixed on the upper cloth feeding shaft.
Furthermore, the upper front-back driving mechanism further comprises a cloth feeding adjusting unit, and the output end of the cloth feeding adjusting unit acts on the first sliding block and is used for changing the position of the first sliding block in the first sliding groove.
Furthermore, the cloth feeding adjusting unit comprises a rotatable adjusting shaft, an adjusting driving source for driving the adjusting shaft to rotate, an adjusting shifting fork fixed on the adjusting shaft and a second sliding block, a second sliding groove which is used for accommodating the second sliding block and is in sliding fit with the second sliding block is formed in the adjusting shifting fork, and the second sliding block, the first sliding block and the upper cloth feeding connecting rod are coaxially hinged.
Further, the upper cloth feeding shaft is parallel to the adjusting shaft.
Further, the upper cloth feed shaft is rotatably supported in the adjusting shaft.
The application also provides a sewing machine, wherein the upper front-back driving mechanism is configured in the sewing machine.
As described above, the upper front and rear driving mechanism for the upper feed dog in the sewing machine and the sewing machine according to the present invention have the following advantageous effects:
the upper front-back driving mechanism is driven by the lower cloth feeding shaft in the front-back driving mechanism to move, so that only a front-back transmission unit needs to be arranged between the lower cloth feeding shaft and the upper cloth feeding shaft, and compared with the prior art, an intermediate transmission shaft and a corresponding transmission unit which are arranged between a main shaft and the upper cloth feeding shaft are omitted, so that the structure and the transmission chain of the upper front-back driving mechanism are simplified, the number of parts is reduced, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural view of a front and rear driving mechanism in the prior art.
Fig. 2 and 3 are schematic structural views of the upper and lower driving mechanisms in the present application.
Fig. 4 is a schematic connection diagram of the adjusting fork, the first slider, the second slider and the first crank in the present application.
Description of the element reference
1. Main shaft
2. Lower feed tooth
3. Upper feed tooth
4. Intermediate transmission shaft
5. Upper cloth feeding shaft
6. Upper dental articulator
7. First crank
71. First chute
8. First slide block
9. Upper cloth feeding connecting rod
10. Second crank
11. Adjusting shaft
12. Adjustable shifting fork
121. Second chute
13. Second slide block
14. Adjustable spanner
15. Lower cloth feeding eccentric wheel
16. Lower cloth feeding connecting rod
17. Lower cloth feeding crank
19. Second pin shaft
20. Third pin shaft
21. Lower cloth feeding shaft
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for descriptive purposes only and are not intended to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical change.
The application provides a sewing machine, the model of which is an overlock machine, and the sewing machine is provided with an upper front-back driving mechanism. For convenience of description, in the following embodiments, the directions are defined as follows: defining the axial direction of the main shaft 1 as a left-right direction, wherein the direction of the main shaft 1 towards the head of the sewing machine is a left direction, and the direction of the main shaft 1 towards the tail of the sewing machine is a right direction; defining the moving direction of the sewing material when the sewing machine is used for sewing as a front direction; a direction orthogonal to both the left-right direction and the front-rear direction is defined as an up-down direction.
As shown in fig. 2 and 3, the sewing machine according to the present invention has an upper feed dog 3 located on the upper side of a needle plate and a lower feed dog 2 located on the lower side of the needle plate, and the upper forward and backward drive mechanism according to the present invention drives the upper feed dog 3 to reciprocate forward and backward. Specifically, the upper front-back driving mechanism comprises a main shaft 1 extending left and right, an upper cloth feeding shaft 5, an upper dental arch 6 connected with the upper cloth feeding shaft 5, an upper cloth feeding shaft 3 fixed on the upper dental arch 6, a lower cloth feeding shaft 21 in the lower front-back driving mechanism, and a front-back transmission unit, wherein the main shaft 1, the upper cloth feeding shaft 5 and the lower cloth feeding shaft 21 are parallel, the lower cloth feeding shaft 21 is connected with the upper cloth feeding shaft 5 through the front-back transmission unit and drives the upper cloth feeding shaft 5 to swing, and the upper cloth feeding shaft 5 drives the upper dental arch 6 and the upper cloth feeding shaft 3 to reciprocate front and back, so that the upper cloth feeding shaft 3 drives the sewing material to move in the front-back direction. Particularly, the upper front-back driving mechanism is driven by the lower cloth feeding shaft 21 in the front-back driving mechanism to move, the power transmission of the upper front-back driving mechanism is carried out by utilizing the existing lower cloth feeding shaft 21 in the sewing machine, only a front-back transmission unit is needed to be arranged between the lower cloth feeding shaft 21 and the upper cloth feeding shaft 5, compared with the prior art, the middle transmission shaft 4 arranged between the main shaft 1 and the upper cloth feeding shaft 5 and a corresponding transmission unit are omitted, and therefore the structure and the transmission chain of the upper front-back driving mechanism are simplified, the number of parts is reduced, and the cost is reduced.
Preferably, as shown in fig. 2, the lower cloth feeding shaft 21 is driven to rotate by the main shaft 1, the lower front and rear driving mechanism has a lower cloth feeding assembly disposed between the main shaft 1 and the lower cloth feeding shaft 21, the lower cloth feeding assembly includes a lower cloth feeding eccentric 15 fixed to the main shaft 1, a lower cloth feeding connecting rod 16, and a lower cloth feeding crank 17 fixed to a left end of the lower cloth feeding shaft 21, one end of the lower cloth feeding connecting rod 16 is rotatably fitted around an outer circumference of the lower cloth feeding eccentric 15, and the other end of the lower cloth feeding connecting rod 16 is hinged to the lower cloth feeding crank 17 by a first pin shaft extending left and right.
Further, as shown in fig. 2 to 4, the front-rear transmission unit includes a first crank 7 having a first sliding slot 71, a first slider 8 disposed in the first sliding slot 71 and slidably engaged with the first sliding slot 71, an upper cloth feeding link 9, and a second crank 10, the first crank 7 is fixed at the right end of the lower cloth feeding shaft 21, the first slider 8 is hinged to the lower end of the upper cloth feeding link 9 by a second pin 19 extending left and right, the upper end of the upper cloth feeding link 9 is hinged to the second crank 10 by a third pin 20 extending left and right, and the second crank 10 is fixed on the upper cloth feeding shaft 5. When the main shaft 1 rotates, the main shaft 1 drives the lower cloth feeding shaft 21 to swing through the lower cloth feeding assembly, the lower cloth feeding shaft 21 drives the first crank 7 to swing together, the second crank 10 is driven to swing through the first sliding block 8 and the upper cloth feeding connecting rod 9, the second crank 10 drives the upper cloth feeding shaft 5 to swing together, and then the upper tooth frame 6 and the upper tooth feeding 3 are driven to reciprocate back and forth.
Further, as shown in fig. 2 and 3, the upper front-back driving mechanism further includes a cloth feeding adjusting unit, an output end of the cloth feeding adjusting unit acts on the first slider 8 to change a position of the first slider 8 in the first chute 71, so that a transmission efficiency of the front-back transmission unit can be changed, that is, a swing amplitude of the lower cloth feeding shaft 21 driving the upper cloth feeding shaft 5 to swing through the front-back transmission unit, that is, a movement amplitude of the upper feed dog 3 reciprocating back and forth is changed, and finally, a cloth feeding amount of the upper feed dog 3 is adjusted, so as to achieve an optimal cloth feeding effect.
The preferable structure of the cloth feeding adjusting unit is as follows: as shown in fig. 2 to 4, the cloth feeding adjusting unit includes a rotatable adjusting shaft 11, an adjusting drive source for driving the adjusting shaft 11 to rotate, an adjusting fork 12 with an upper end fixed on the adjusting shaft 11, and a second slider 13, wherein a second sliding slot 121 is formed at a lower end of the adjusting fork 12, the second slider 13 is located in the second sliding slot 121 and is in sliding fit with the second sliding slot 121, and the second slider 13, the first slider 8 and the upper cloth feeding connecting rod 9 are coaxially hinged by the second pin 19. When the cloth feeding amount of the upper feed dog 3 needs to be adjusted, the adjusting driving source drives the adjusting shaft 11 to rotate by an angle, the adjusting shaft 11 drives the adjusting shifting fork 12 to rotate by the same angle, the second sliding block 13 is driven to slide in the second sliding groove 121, and the first sliding block 8 is driven to move, so that the position of the first sliding block 8 in the first sliding groove 71 is changed.
Preferably, the upper feed shaft 5 is parallel to the regulating shaft 11. The upper cloth feeding shaft 5 is rotatably supported in the adjusting shaft 11 and is in a splicing relationship; or the upper cloth feeding shaft 5 and the adjusting shaft 11 are not inserted and are relatively independent. In addition, the adjusting driving source may be an adjusting wrench 14, as shown in fig. 2 and 3, the adjusting wrench 14 is located outside the sewing machine housing and fixed at the right end of the adjusting shaft 11, and at this time, the cloth feeding amount of the upper feed dog 3 is manually adjusted. Alternatively, the adjusting driving source may be a motor, and an output shaft of the motor is fixed to the right end of the adjusting shaft 11, in this case, the cloth feeding amount of the upper feed dog 3 is automatically adjusted.
In the above structure, the main shaft 1, the upper cloth feed shaft 5, the lower cloth feed shaft 21, and the adjusting shaft 11 are rotatably installed in the sewing machine housing, and the rotational center axes of the shafts are fixed axes.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a last front and back actuating mechanism that is arranged in sewing machine to send tooth (3), includes main shaft (1), goes up work feed axle (5), last tooth frame (6) that link to each other with last work feed axle (5) and is fixed in last tooth (3) of last tooth frame (6), its characterized in that: the cloth feeding mechanism is characterized by further comprising a lower cloth feeding shaft (21) and a front-back transmission unit in the lower front-back driving mechanism, wherein the main shaft (1), the upper cloth feeding shaft (5) and the lower cloth feeding shaft (21) are parallel, and the lower cloth feeding shaft (21) is connected with the upper cloth feeding shaft (5) through the front-back transmission unit and drives the upper cloth feeding shaft (5) to swing;
the front-rear transmission unit comprises a first crank (7) with a first sliding chute (71), a first sliding block (8) which is arranged in the first sliding chute (71) and is in sliding fit with the first sliding chute (71), an upper cloth feeding connecting rod (9) and a second crank (10), the first crank (7) is fixed on a lower cloth feeding shaft (21), the first sliding block (8) is hinged with one end of the upper cloth feeding connecting rod (9), the other end of the upper cloth feeding connecting rod (9) is hinged with the second crank (10), and the second crank (10) is fixed on an upper cloth feeding shaft (5);
the upper front-back driving mechanism utilizes a lower cloth feeding shaft (21) in the sewing machine to transmit power of the upper front-back driving mechanism.
2. The upper front-rear drive mechanism according to claim 1, characterized in that: the cloth feeding device further comprises a cloth feeding adjusting unit, wherein the output end of the cloth feeding adjusting unit acts on the first sliding block (8) and is used for changing the position of the first sliding block (8) in the first sliding groove (71).
3. The upper front-rear drive mechanism according to claim 2, wherein: the cloth feeding adjusting unit comprises a rotatable adjusting shaft (11), an adjusting driving source for driving the adjusting shaft (11) to rotate, an adjusting shifting fork (12) fixed on the adjusting shaft (11) and a second sliding block (13), wherein a second sliding groove (121) which is used for accommodating the second sliding block (13) and is in sliding fit with the second sliding block (13) is formed in the adjusting shifting fork (12), and the second sliding block (13), the first sliding block (8) and an upper cloth feeding connecting rod (9) are coaxially hinged.
4. The upper front-rear driving mechanism according to claim 3, wherein: the upper cloth feeding shaft (5) is parallel to the adjusting shaft (11).
5. The upper forward-backward driving mechanism according to claim 3 or 4, wherein: the upper cloth feeding shaft (5) is rotatably supported in the adjusting shaft (11).
6. A sewing machine characterized by: the sewing machine is provided with the upper front-rear driving mechanism according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010266798.XA CN113493964B (en) | 2020-04-07 | 2020-04-07 | Upper front-back driving mechanism for upper feeding teeth in sewing machine and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010266798.XA CN113493964B (en) | 2020-04-07 | 2020-04-07 | Upper front-back driving mechanism for upper feeding teeth in sewing machine and sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113493964A CN113493964A (en) | 2021-10-12 |
| CN113493964B true CN113493964B (en) | 2022-10-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010266798.XA Active CN113493964B (en) | 2020-04-07 | 2020-04-07 | Upper front-back driving mechanism for upper feeding teeth in sewing machine and sewing machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN113493964B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3605662A (en) * | 1970-05-01 | 1971-09-20 | Singer Co | Upper feed mechanism |
| JP2006075248A (en) * | 2004-09-07 | 2006-03-23 | Juki Corp | Upper feed device for sewing machine |
| CN103046239B (en) * | 2011-10-14 | 2015-03-25 | 高林股份有限公司 | Cloth feeding device of sewing machine |
| JP2014151077A (en) * | 2013-02-12 | 2014-08-25 | Pegasus Sewing Machine Mfg Co Ltd | Top feed amount adjustment mechanism for overlock sewing machine |
| US9027488B2 (en) * | 2013-10-02 | 2015-05-12 | Shing Ray Sewing Machine Co., Ltd | Direct drive cloth feeding mechanism of sewing machine |
| CN209397353U (en) * | 2018-11-23 | 2019-09-17 | 浙江乐江机械有限公司 | Feed dog frame mechanism on a kind of sewing machine |
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2020
- 2020-04-07 CN CN202010266798.XA patent/CN113493964B/en active Active
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| CN113493964A (en) | 2021-10-12 |
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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Applicant after: Jack Technology Co.,Ltd. Address before: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Applicant before: JACK SEWING MACHINE Co.,Ltd. |
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