CN108118466B - Go up trimming actuating mechanism and buttonholing machine - Google Patents
Go up trimming actuating mechanism and buttonholing machine Download PDFInfo
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- CN108118466B CN108118466B CN201611075318.1A CN201611075318A CN108118466B CN 108118466 B CN108118466 B CN 108118466B CN 201611075318 A CN201611075318 A CN 201611075318A CN 108118466 B CN108118466 B CN 108118466B
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- wire cutting
- upper wire
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- cam
- cutting
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
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- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides an upper thread cutting driving mechanism which is used for being connected with an upper thread cutting executing assembly, wherein the upper thread cutting executing assembly comprises a first rocker, a second rocker and an upper thread cutting assembly, and the upper thread cutting driving mechanism comprises a driving motor, a driving cam, a first upper thread cutting driving rod group and a second upper thread cutting driving rod group; the driving cam is provided with a first cam sliding groove and a second cam sliding groove which are in a closed curve shape; the first upper wire cutting driving rod group is provided with a first upper wire cutting roller which is embedded in a first cam chute of the driving cam, and the tail end of the first upper wire cutting driving rod group is hinged with the first rocker; the second upper wire cutting driving rod group is provided with a second upper wire cutting roller which is embedded in a second cam sliding groove of the driving cam, and the tail end of the second upper wire cutting driving rod group is hinged with the second rocker. The driving motor drives the driving cam to rotate for a circle, so that the upper thread cutting executing assembly can be driven to complete one thread cutting cycle, and a plurality of mechanisms can share one driving cam, so that the cost is reduced, and the structure is simplified.
Description
Technical Field
The invention relates to a garment sewing device, in particular to an upper thread cutting driving mechanism and a buttonholing machine.
Background
Buttonholing machine is one type of industrial sewing machine, belongs to special machine, and is mainly used for processing buttonholes in various clothes. The buttonholing machine is mainly provided with a thread cutting mechanism, a presser foot lifting mechanism and the like, wherein the thread cutting mechanism is divided into an upper thread cutting mechanism driven by an upper thread cutting driving mechanism and a lower thread cutting mechanism driven by a lower thread cutting driving mechanism, the upper thread cutting mechanism is used for cutting upper threads, and the lower thread cutting mechanism is used for cutting lower threads. At present, an upper thread cutting driving mechanism in a buttonholing machine on the market mainly comprises an upper thread cutting cam and a driving rod group, wherein the upper thread cutting cam performs reciprocating swing motion, namely: the motor drives an upper wire cutting cam in the upper wire cutting driving mechanism to swing back and forth according to a certain beat and rule, so that the control of the upper wire cutting mechanism is realized. The upper thread cutting driving method can realize thread cutting, but because the upper thread cutting cam performs reciprocating swinging motion, the upper thread cutting driving method is unfavorable for sharing one motor with other mechanisms (such as a lower thread cutting mechanism, a presser foot lifting mechanism and the like) in the buttonholing machine, so that each mechanism in the buttonholing machine is driven by one motor, the cost is high, the structure is very complex, and the buttonholing machine is huge and not compact.
Disclosure of Invention
In view of the above-described drawbacks of the prior art, an object of the present invention is to provide an upper wire cutting driving mechanism that uses one cam to rotate one revolution to realize one upper wire cutting cycle, thereby reducing the cost and simplifying the mechanism.
In order to achieve the above object, the present invention provides an upper thread cutting driving mechanism, which is used for being connected with an upper thread cutting executing assembly, wherein the upper thread cutting executing assembly comprises a first rocker, a second rocker and an upper thread cutting assembly for cutting an upper thread, and the upper thread cutting driving mechanism comprises a driving motor, a driving cam directly or indirectly driven to rotate by the driving motor, a first upper thread cutting driving rod group and a second upper thread cutting driving rod group; the driving cam is provided with a first cam sliding groove and a second cam sliding groove which are in a closed curve shape, and the first cam sliding groove and the second cam sliding groove comprise an upper wire cutting opening section, an upper wire cutting waiting section, an upper wire cutting section and an upper wire cutting resetting section which are connected end to end in sequence; the first upper wire cutting driving rod group is provided with a rotatable first upper wire cutting roller, the first upper wire cutting roller is embedded into a first cam chute of the driving cam and matched with the first cam chute, and the tail end of the first upper wire cutting driving rod group is hinged with a first rocker and used for controlling the opening and closing of the upper wire cutting assembly; the second upper wire cutting driving rod group is provided with a rotatable second upper wire cutting roller, the second upper wire cutting roller is embedded into a second cam chute of the driving cam and matched with the second cam chute, and the tail end of the second upper wire cutting driving rod group is hinged with a second rocker and used for controlling the running position of the upper wire cutting assembly.
Preferably, the motor driving device further comprises a motor mounting plate with a fixed position, the driving motor is fixed on the lower end face of the motor mounting plate, and the driving cam is rotatably positioned above the motor mounting plate.
Further, the first upper wire cutting driving rod group comprises a first upper wire cutting driving crank and a first upper wire cutting connecting rod which is bent and extended, one end of the first upper wire cutting driving crank is hinged with the motor mounting plate, the first upper wire cutting driving crank is provided with a first fixed swinging fulcrum, the other end of the first upper wire cutting driving crank is hinged with one end of the first upper wire cutting connecting rod, the other end of the first upper wire cutting connecting rod is hinged with the first rocker, and the first upper wire cutting roller is rotatably arranged on the first upper wire cutting driving crank.
Further, the second upper wire cutting driving rod group comprises a second upper wire cutting driving crank and a second upper wire cutting connecting rod which is bent and extended, one end of the second upper wire cutting driving crank is hinged with the motor mounting plate, the second upper wire cutting driving crank is provided with a second fixed swinging fulcrum, the other end of the second upper wire cutting driving crank is hinged with one end of the second upper wire cutting connecting rod, the other end of the second upper wire cutting connecting rod is hinged with the second rocking rod, and the second upper wire cutting roller is rotatably arranged on the second upper wire cutting driving crank.
Preferably, the first cam sliding groove and the second cam sliding groove are respectively formed on the upper end face and the lower end face of the driving cam.
Further, the change rule of the radius of the first cam chute is as follows: the radius of the upper trimming cutting section is gradually reduced and then gradually increased, the radius of the upper trimming to-be-cut section is gradually reduced and then gradually increased, the radius of the upper trimming cutting section is gradually reduced, the tail end of the upper trimming cutting section is provided with a radius minimum value of a first cam sliding groove, and the radius of the upper trimming resetting section is unchanged and then gradually increased.
Further, the change rule of the radius of the second cam chute is as follows: the radius of the upper cutting wire cutting section is firstly unchanged and then gradually reduced, the radius of the upper cutting wire section to be cut is firstly gradually increased and then unchanged, the radius of the upper cutting wire cutting section is gradually increased, the tail end of the upper cutting wire cutting section is provided with the radius maximum value of the second cam sliding groove, and the radius of the upper cutting wire resetting section is gradually reduced.
Preferably, the driving motor is vertically installed and provided with a motor output shaft extending up and down, and the motor output shaft penetrates through the motor installation plate and then is fixed with the driving cam.
Further, the first cam sliding groove and the second cam sliding groove also comprise upper thread cutting idle stroke sections, the upper thread cutting idle stroke sections are positioned between the upper thread cutting reset sections and the upper thread cutting open sections, and the radius of the upper thread cutting idle stroke sections is unchanged.
The invention also provides a buttonholing machine which is provided with a shell, wherein the upper thread cutting driving mechanism is arranged in the shell.
As described above, the upper thread cutting driving mechanism and the buttonholing machine provided by the invention have the following beneficial effects:
in this application, drive the drive cam through driving motor and rotate a week, can go up the combined action of cutting the line actuating lever group on first and the second, cut the line and carry out the subassembly and accomplish a line cycle on the drive, because drive cam is 360 degrees rotary motion, and not swing, other mechanisms in the buttonholing machine (like lower thread cutting mechanism, lift presser foot mechanism etc.) can all be driven by drive cam, realized that a plurality of mechanisms share a drive cam, thereby reach greatly reduced cost, simplify the purpose of structure, so buttonholing machine's structure is compacter, be favorable to reducing the machine volume, improve whole pleasing to the eye degree.
Drawings
Fig. 1 is a schematic structural view of a buttonholing machine in the present application.
Fig. 2 is a schematic structural view of an upper wire cutting driving mechanism in the present application.
Fig. 3 is a schematic structural view of the first upper wire cutting driving rod set in fig. 2.
Fig. 4 is a schematic structural view of the second upper wire cutting driving rod set in fig. 2.
Fig. 5 is a schematic structural view of the first cam runner in fig. 2.
Fig. 6 is a schematic structural view of the second cam runner of fig. 2.
Fig. 7 is a graph of the radius variation of the first cam runner and the second cam runner of the present application.
Description of element reference numerals
10. Upper thread cutting execution assembly
11. First rocker
12. Second rocker
13. Upper scissors assembly
20. Driving motor
30. Driving cam
31. First cam sliding groove
32. Second cam sliding groove
33. Upper trimming and cutting section
34. Upper trimming to-be-cut section
35. Upper trimming line segment
36. Upper trimming reset segment
37. Upper trimming idle stroke section
40. First upper thread cutting driving rod group
41. First upper thread cutting roller
42. First upper thread cutting driving crank
43. First upper trimming connecting rod
50. Second upper thread cutting driving rod group
51. Second upper thread cutting roller
52. Second upper thread cutting driving crank
53. Second upper trimming connecting rod
60. Motor mounting plate
70. Shaft position screw
80. Casing of machine
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
In the following examples, the directions are defined as follows: the longitudinal direction of the buttonholing machine is defined as the left-right direction, the width direction of the buttonholing machine is defined as the front-rear direction, and the height direction of the buttonholing machine is defined as the up-down direction.
The application provides an upper thread cutting driving mechanism, as shown in fig. 1 and 2, which is used for being connected with an upper thread cutting executing component 10 in a buttonholing machine, wherein the structure of the upper thread cutting executing component 10 belongs to the prior art, and the specific structure can be seen from a model JK-1790 of the buttonholing machine produced by the company of the Jack sewing machine, inc. Generally, the upper thread cutting assembly 10 in the buttonholing machine comprises a first rocker 11, a second rocker 12 and an upper scissors assembly 13 for cutting thread, wherein the upper end of the first rocker 11 and the upper end of the second rocker 12 are hinged to a casing 80 of the buttonholing machine, and the middle lower section of the first rocker 11 and the middle lower section of the second rocker 12 are connected with an upper thread cutting driving assembly, so that the first rocker 11 and the second rocker 12 are driven to swing by the upper thread cutting driving assembly, thereby driving the upper scissors assembly 13 to act, and the upper scissors assembly 13 includes an opening and closing, and a running position moving back and forth and left and right. The upper thread cutting execution assembly 10 is located outside of the buttonhole machine housing 80, below the housing 80, and above the sewing table.
Further, as shown in fig. 2 to 6, the upper wire cutting driving mechanism is installed in a casing 80 of the buttonholing machine, and includes a driving motor 20, a driving cam 30 directly or indirectly driven to rotate by the driving motor 20, a first upper wire cutting driving lever group 40, and a second upper wire cutting driving lever group 50; the driving cam 30 is used for outputting a motion track, so that a first cam chute 31 and a second cam chute 32 with closed curves are formed on the driving cam 30, and the first cam chute 31 and the second cam chute 32 comprise an upper wire cutting open section 33, an upper wire cutting waiting section 34, an upper wire cutting section 35 and an upper wire cutting reset section 36 which are connected end to end in sequence. The first upper wire cutting driving rod set 40 is connected with a rotatable first upper wire cutting roller 41, the first upper wire cutting roller 41 is embedded into the first cam sliding groove 31 of the driving cam 30 and matched with the first cam sliding groove 31, and is used for transmitting a motion track output by the driving cam 30 to the first upper wire cutting driving rod set 40, and the output tail end of the first upper wire cutting driving rod set 40 is hinged with the first rocker 11 and is used for controlling the opening and closing of the upper wire cutting assembly 13. The second upper wire cutting driving rod set 50 is connected with a rotatable second upper wire cutting roller 51, and the second upper wire cutting roller 51 is embedded in the second cam chute 32 of the driving cam 30 and matched with the second cam chute 32, so as to transmit the motion track output by the driving cam 30 to the second upper wire cutting driving rod set 50, and the output end of the second upper wire cutting driving rod set 50 is hinged with the second rocker 12 and is used for controlling the position of the upper wire cutting assembly 13.
In the operation process of the upper wire cutting driving mechanism with the above structure, the driving motor 20 drives the driving cam 30 to rotate, the driving cam 30 drives the first cam sliding groove 31 to rotate relative to the first upper wire cutting roller 41, and drives the second cam sliding groove 32 to rotate relative to the second upper wire cutting roller 51, namely: the first upper thread cutting roller 41 relatively moves along the extending track of the first cam sliding groove 31, the second upper thread cutting roller 51 relatively moves along the extending track of the second cam sliding groove 32, and the first upper thread cutting roller 41 drives the first upper thread cutting driving rod group 40 to act, and the second upper thread cutting roller 51 drives the second upper thread cutting driving rod group 50 to act, so that the upper thread cutting assembly 13 in the upper thread cutting executing assembly 10 is jointly driven to act, and the upper thread cutting assembly 13 sequentially executes the cutting action, the waiting cutting action, the thread cutting action and the resetting action. Preferably, the first cam runner 31 and the second cam runner 32 are respectively formed on the upper end face and the lower end face of the driving cam 30; of course, the positions of the two can be interchanged.
Specifically, when the buttonholing machine is used for stitching, the first upper thread cutting roller 41 and the second upper thread cutting roller 51 are both positioned at the head end of the upper thread cutting section 33, the upper thread cutting assembly 13 is closed and clamps the upper thread, the upper thread cutting assembly 13 is positioned at the initial position, the first upper thread cutting roller 41 is positioned at the head end of the upper thread cutting section 33 in the first cam sliding groove 31, and the second upper thread cutting roller 51 is positioned at the head end of the upper thread cutting section 33 in the second cam sliding groove 32. After starting the seam, the first upper thread cutting roller 41 in the first upper thread cutting driving rod group 40 relatively moves in the upper thread cutting opening section 33 in the first cam sliding groove 31, the second upper thread cutting roller 51 in the second upper thread cutting driving rod group 50 relatively moves in the upper thread cutting opening section 33 in the second cam sliding groove 32, so that the upper thread cutting assembly 13 opens and loosens the upper thread, and the upper thread cutting assembly 13 is driven to move to a position to be cut. Thereafter, the first upper wire cutting roller 41 of the first upper wire cutting driving lever set 40 relatively moves in the upper wire cutting section 34 of the first cam chute 31, and the second upper wire cutting roller 51 of the second upper wire cutting driving lever set 50 relatively moves in the upper wire cutting section 34 of the second cam chute 32, driving the upper wire cutting assembly 13 to move to the wire cutting position. Then, the first upper thread cutting roller 41 of the first upper thread cutting driving rod group 40 relatively moves in the upper thread cutting segment 35 of the first cam sliding groove 31, and the second upper thread cutting roller 51 of the second upper thread cutting driving rod group 50 relatively moves in the upper thread cutting segment 35 of the second cam sliding groove 32, so as to drive the upper thread cutting assembly 13 to be closed, cut the upper thread and clamp the cut upper thread. Finally, the first upper thread cutting roller 41 of the first upper thread cutting driving rod group 40 relatively moves in the upper thread cutting reset section 36 of the first cam sliding groove 31, the second upper thread cutting roller 51 of the second upper thread cutting driving rod group 50 relatively moves in the upper thread cutting reset section 36 of the second cam sliding groove 32, the upper thread cutting assembly 13 is driven to clamp the upper thread to move back to the initial position, the thread cutting cycle of one upper thread cutting action is completed, and the next thread cutting cycle is ready to start. The action sequence of the upper scissors assembly 13 is as follows: origin → open → wait to cut → cut the line → return to the origin.
From the above, it can be seen that: this application drives drive cam 30 through driving motor 20 and rotates a week, can go up the combined action of cutting the line actuating lever group 40 and cutting the line actuating assembly 10 and accomplish a line cycle on the drive on the second of cutting the line actuating lever group 50, because drive cam 30 is 360 degrees rotary motion, and not swing, other mechanisms in the buttonholing machine (like lower thread cutting mechanism, lift presser foot mechanism etc.) can all be driven by drive cam 30, realized that a plurality of mechanisms share a drive cam, thereby reach greatly reduced cost, simplify the purpose of structure, so buttonholing machine's structure is compacter, be favorable to reducing the machine volume, improve whole aesthetic measure.
Preferably, as shown in fig. 2, the upper wire cutting driving mechanism further includes a motor mounting plate 60 having a fixed position, the motor mounting plate 60 is positioned in the housing 80 and fixed to the housing 80, the driving motor 20 is fixed to a lower end surface of the motor mounting plate 60, and the driving cam 30 is rotatably positioned above the motor mounting plate 60. The driving motor 20 is vertically installed, so the driving motor 20 has a motor output shaft extending up and down, and the motor output shaft passes through the motor mounting plate 60 and is fixed with the driving cam 30, so that the driving motor 20 directly drives the driving cam 30 to rotate; meanwhile, since the driving motor 20 is vertically installed, the driving motor 20 can be built in the casing 80, so that a plurality of mechanisms in the buttonholing machine can easily share one driving motor 20, the mechanisms are more compact, and the cost of the whole buttonholing machine is effectively reduced.
Further, as shown in fig. 3, the first upper wire cutting driving rod set 40 includes a first upper wire cutting driving crank 42 and a first upper wire cutting connecting rod 43 extending in a bending manner, wherein the front end of the first upper wire cutting driving crank 42 is hinged to the motor mounting plate 60, so that the first upper wire cutting driving crank 42 has a first fixed swinging fulcrum O1, the rear end of the first upper wire cutting driving crank 42 is hinged to the left end of the first upper wire cutting connecting rod 43, the right end of the first upper wire cutting connecting rod 43 is hinged to the first rocker 11, and the first upper wire cutting roller 41 is rotatably mounted on the lower end surface of the first upper wire cutting driving crank 42 through a pin extending up and down. The first upper wire cutting driving rod set 40 is close to a space four-rod mechanism, when the first upper wire cutting roller 41 moves relative to the first cam chute 31 of the driving cam 30, the first upper wire cutting driving crank 42 swings around the first fixed swinging fulcrum O1 by a certain amplitude, so as to drive the first upper wire cutting connecting rod 43 and the first rocker 11 to swing, and further drive the upper wire cutting assembly 13 to execute related actions. Preferably, the first upper wire cutting driving crank 42 is hinged to the motor mounting plate 60, the first upper wire cutting driving crank 42 is hinged to the first upper wire cutting connecting rod 43 through an axle position screw 70 extending up and down, and the first upper wire cutting connecting rod 43 is hinged to the first rocker 11 through an axle position screw 70 extending back and forth.
Further, as shown in fig. 4, the second upper wire cutting driving rod set 50 includes a second upper wire cutting driving crank 52 and a second upper wire cutting connecting rod 53 extending in a bending manner, wherein the front end of the second upper wire cutting driving crank 52 is hinged to the motor mounting plate 60, so that the second upper wire cutting driving crank 52 has a second fixed swinging fulcrum O2, the rear end of the second upper wire cutting driving crank 52 is hinged to the left end of the second upper wire cutting connecting rod 53, the right end of the second upper wire cutting connecting rod 53 is hinged to the second rocker 12, and the second upper wire cutting roller 51 is rotatably mounted on the upper end surface of the second upper wire cutting driving crank 52 through a pin extending up and down. The second upper wire cutting driving rod set 50 is also close to a space four-rod mechanism, when the second upper wire cutting roller 51 moves relative to the second cam chute 32 of the driving cam 30, the second upper wire cutting driving crank 52 swings around the second fixed swinging fulcrum O2 by a certain amplitude, so as to drive the second upper wire cutting connecting rod 53 and the second rocker 12 to swing, and further drive the upper wire cutting assembly 13 to execute related actions. Preferably, the second upper wire cutting driving crank 52 is hinged to the motor mounting plate 60, the second upper wire cutting driving crank 52 is hinged to the second upper wire cutting connecting rod 53 through an axle position screw 70 extending up and down, and the second upper wire cutting connecting rod 53 is hinged to the second rocker 12 through an axle position screw 70 extending back and forth.
Preferably, the upper thread cutting driving mechanism shares the driving motor 20 and the driving cam 30 with the presser foot lifting mechanism in the buttonholing machine, so, as shown in fig. 5 and 6, the first cam runner 31 and the second cam runner 32 also both comprise an upper thread cutting idle section 37, the upper thread cutting idle section 37 is located between the upper thread cutting reset section 36 and the upper thread cutting open section 33, and the radius of the upper thread cutting idle section 37 is unchanged. Therefore, when the first upper wire cutting roller 41 in the first upper wire cutting driving rod group 40 relatively moves in the upper wire cutting idle stroke section 37 in the first cam sliding groove 31 and the second upper wire cutting roller 51 in the second upper wire cutting driving rod group 50 relatively moves in the upper wire cutting idle stroke section 37 in the second cam sliding groove 32, neither the first upper wire cutting driving rod group 40 nor the second upper wire cutting driving rod group 50 is operated, so that the upper wire cutting driving mechanism is also not operated, nor the upper cutter assembly 13 is operated, but the presser foot lifting mechanism of the buttonholing machine is operated, so that the upper wire cutting idle stroke section 37 is the presser foot lifting stroke section of the buttonholing machine.
As shown in fig. 7, the radius of the first cam runner 31 is changed according to the following rule: the radius of the upper trimming open section 33 is gradually reduced and then gradually increased, the radius of the upper trimming to-be-trimmed section 34 is gradually reduced and then gradually increased, the radius of the upper trimming cut section 35 is gradually reduced, and the tail end is provided with the radius minimum value of the first cam sliding groove 31, so that the inclination of the upper trimming cut section 35 is larger, the radius of the upper trimming reset section 36 is unchanged and then gradually increased, and the radius of the upper trimming idle stroke section 37 is unchanged. The radius of the second cam chute 32 is changed according to the following rule: the radius of the upper trimming open section 33 is firstly unchanged and then gradually reduced, the radius of the upper trimming to-be-trimmed section 34 is firstly gradually increased and then unchanged, the radius of the upper trimming cut section 35 is gradually increased, and the tail end is provided with the radius maximum value of the second cam sliding groove 32, so that the inclination of the upper trimming cut section 35 is larger, the radius of the upper trimming reset section 36 is gradually reduced, and the radius of the upper trimming idle stroke section 37 is unchanged.
The present application also provides a buttonholing machine, as shown in fig. 1, which has a housing 80, in which the upper thread cutting driving mechanism as described above is installed in the housing 80.
In summary, the present invention effectively overcomes the disadvantages of the prior art and has high industrial utility value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. An upper thread cutting driving mechanism is used for being connected with an upper thread cutting executing assembly (10), and the upper thread cutting executing assembly (10) comprises a first rocker (11), a second rocker (12) and an upper thread cutting assembly (13) for a shear thread, and is characterized in that: the upper wire cutting driving mechanism comprises a driving motor (20), a driving cam (30) directly or indirectly driven to rotate by the driving motor (20), a first upper wire cutting driving rod group (40) and a second upper wire cutting driving rod group (50); a first cam sliding groove (31) and a second cam sliding groove (32) which are in a closed curve shape are formed in the driving cam (30), and the first cam sliding groove (31) and the second cam sliding groove (32) comprise an upper wire cutting opening cutting section (33), an upper wire cutting section to be cut (34), an upper wire cutting section (35) and an upper wire cutting resetting section (36) which are connected end to end in sequence; the first upper wire cutting driving rod group (40) is provided with a rotatable first upper wire cutting roller (41), the first upper wire cutting roller (41) is embedded into a first cam sliding groove (31) of the driving cam (30) and is matched with the first cam sliding groove (31), and the tail end of the first upper wire cutting driving rod group (40) is hinged with the first rocker (11) and used for controlling the opening and closing of the upper wire cutting assembly (13); the second upper wire cutting driving rod group (50) is provided with a rotatable second upper wire cutting roller (51), the second upper wire cutting roller (51) is embedded into a second cam sliding groove (32) of the driving cam (30) and matched with the second cam sliding groove (32), and the tail end of the second upper wire cutting driving rod group (50) is hinged with the second rocker (12) and used for controlling the position of the upper wire cutting assembly (13).
2. The upper wire cutting drive mechanism of claim 1, wherein: the motor driving device further comprises a motor mounting plate (60) with a fixed position, the driving motor (20) is fixed on the lower end face of the motor mounting plate (60), and the driving cam (30) is rotatably positioned above the motor mounting plate (60).
3. The upper wire cutting drive mechanism of claim 2, wherein: the first upper wire cutting driving rod group (40) comprises a first upper wire cutting driving crank (42) and a first upper wire cutting connecting rod (43) which is bent and extended, one end of the first upper wire cutting driving crank (42) is hinged with the motor mounting plate (60), the first upper wire cutting driving crank (42) is provided with a first fixed swinging fulcrum (O1), the other end of the first upper wire cutting driving crank (42) is hinged with one end of the first upper wire cutting connecting rod (43), the other end of the first upper wire cutting connecting rod (43) is hinged with the first rocking rod (11), and the first upper wire cutting roller (41) is rotatably arranged on the first upper wire cutting driving crank (42).
4. The upper wire cutting drive mechanism of claim 2, wherein: the second upper wire cutting driving rod group (50) comprises a second upper wire cutting driving crank (52) and a second upper wire cutting connecting rod (53) which is bent and extended, one end of the second upper wire cutting driving crank (52) is hinged with the motor mounting plate (60), the second upper wire cutting driving crank (52) is provided with a second fixed swinging fulcrum (O2), the other end of the second upper wire cutting driving crank (52) is hinged with one end of the second upper wire cutting connecting rod (53), the other end of the second upper wire cutting connecting rod (53) is hinged with the second rocking rod (12), and the second upper wire cutting roller (51) is rotatably arranged on the second upper wire cutting driving crank (52).
5. The upper wire cutting drive mechanism as set forth in any one of claims 1-4, wherein: the first cam sliding groove (31) and the second cam sliding groove (32) are respectively arranged on the upper end face and the lower end face of the driving cam (30).
6. The upper wire cutting drive mechanism of claim 1, wherein: the change rule of the radius of the first cam sliding groove (31) is as follows: the radius of the upper trimming opening section (33) is gradually reduced and then gradually increased, the radius of the upper trimming section (34) to be trimmed is gradually reduced and then gradually increased, the radius of the upper trimming section (35) is gradually reduced, the tail end of the upper trimming section is provided with a radius minimum value of the first cam sliding groove (31), and the radius of the upper trimming reset section (36) is unchanged and then gradually increased.
7. The upper wire cutting drive mechanism of claim 1, wherein: the change rule of the radius of the second cam sliding groove (32) is as follows: the radius of the upper trimming cutting section (33) is unchanged and then gradually reduced, the radius of the upper trimming section (34) to be trimmed is gradually increased and then unchanged, the radius of the upper trimming cutting section (35) is gradually increased, the tail end of the upper trimming cutting section is provided with the maximum value of the radius of the second cam sliding groove (32), and the radius of the upper trimming resetting section (36) is gradually reduced.
8. The upper wire cutting drive mechanism of claim 2, wherein: the driving motor (20) is vertically installed and is provided with a motor output shaft extending up and down, and the motor output shaft penetrates through the motor installation plate (60) and is fixed with the driving cam (30).
9. The upper wire cutting drive mechanism of claim 1, wherein: the first cam sliding groove (31) and the second cam sliding groove (32) also comprise an upper thread cutting idle stroke section (37), the upper thread cutting idle stroke section (37) is positioned between the upper thread cutting reset section (36) and the upper thread cutting open section (33), and the radius of the upper thread cutting idle stroke section (37) is unchanged.
10. A buttonholing machine having a housing (80), characterized by: the upper wire cutting drive mechanism as claimed in any one of claims 1 to 9 is mounted in the housing (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611075318.1A CN108118466B (en) | 2016-11-29 | 2016-11-29 | Go up trimming actuating mechanism and buttonholing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611075318.1A CN108118466B (en) | 2016-11-29 | 2016-11-29 | Go up trimming actuating mechanism and buttonholing machine |
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| CN108118466A CN108118466A (en) | 2018-06-05 |
| CN108118466B true CN108118466B (en) | 2023-07-25 |
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| CN201611075318.1A Active CN108118466B (en) | 2016-11-29 | 2016-11-29 | Go up trimming actuating mechanism and buttonholing machine |
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| CN101381932A (en) * | 2007-09-05 | 2009-03-11 | 兄弟工业株式会社 | Thread cutting apparatus for sewing machine |
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| CN108118466A (en) | 2018-06-05 |
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