CN108118467B - Lower thread cutting driving mechanism and buttonholing machine - Google Patents
Lower thread cutting driving mechanism and buttonholing machine Download PDFInfo
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- CN108118467B CN108118467B CN201611075458.9A CN201611075458A CN108118467B CN 108118467 B CN108118467 B CN 108118467B CN 201611075458 A CN201611075458 A CN 201611075458A CN 108118467 B CN108118467 B CN 108118467B
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- wire cutting
- lower wire
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- cutting
- cam
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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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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
- D05B3/06—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/02—Mechanical drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a lower thread cutting driving mechanism which is used for being connected with a lower thread cutting executing assembly, wherein the lower thread cutting executing assembly comprises a first shear control board, a second shear control board and a lower shear assembly, and the lower thread cutting driving mechanism comprises a driving motor, a driving cam, a first lower thread cutting driving rod group and a second lower 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 lower wire cutting driving rod group is provided with a first lower wire cutting roller which is embedded in a first cam chute of the driving cam, and the tail end of the first lower wire cutting driving rod group is hinged with the first scissors control board; the second lower wire cutting driving rod group is provided with a second lower wire cutting roller which is embedded into a second cam chute of the driving cam, and the tail end of the second lower wire cutting driving rod group is hinged with the second scissor control plate. The driving motor drives the driving cam to rotate for a circle, so that the lower wire cutting executing assembly can be driven to complete one wire 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 a lower 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, a lower thread cutting driving mechanism in a buttonholing machine on the market mainly comprises a lower thread cutting cam and a driving rod group, wherein the lower thread cutting cam performs reciprocating swing motion, namely: the motor drives the lower wire cutting cam in the lower wire cutting driving mechanism to swing back and forth according to a certain beat and rule, so that the control of the lower wire cutting mechanism is realized. Although the lower thread cutting driving method can realize thread cutting, the lower thread cutting cam does reciprocating swing motion, so that the lower thread cutting driving method is unfavorable for sharing one motor with other mechanisms (such as an upper thread cutting mechanism, a presser foot lifting mechanism and the like) in the buttonholing machine, and each mechanism in the buttonholing machine is driven by one motor respectively, so that the cost is high, the structure is very complex, and the buttonholing machine is huge and is 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 a lower wire cutting driving mechanism that uses one cam to rotate one round to realize one lower wire cutting cycle, thereby reducing the cost and simplifying the mechanism.
In order to achieve the above object, the present invention provides a lower thread cutting driving mechanism, which is used for being connected with a lower thread cutting executing assembly, wherein the lower thread cutting executing assembly comprises a first shear control board, a second shear control board and a lower shear assembly for cutting a bottom thread, and the lower thread cutting driving mechanism comprises a driving motor, a driving cam directly or indirectly driven to rotate by the driving motor, a first lower thread cutting driving rod group and a second lower thread cutting driving rod group; the driving cam is provided with a first cam chute and a second cam chute which are in a closed curve shape, and the first cam chute and the second cam chute comprise a lower wire cutting opening section, a lower wire cutting waiting section, a lower wire cutting section and a lower wire cutting resetting section which are connected end to end in sequence; the first lower wire cutting driving rod group is provided with a rotatable first lower wire cutting roller, the first lower 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 lower wire cutting driving rod group is hinged with the first scissors control board and used for controlling the opening and closing of the lower scissors assembly; the second lower wire cutting driving rod group is provided with a rotatable second lower wire cutting roller, the second lower 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 lower wire cutting driving rod group is hinged with the second scissors control board and used for controlling the running position of the lower scissors assembly.
Preferably, the motor driving device further comprises a motor mounting plate with a fixed position, and the driving motor is fixed on the lower end face of the motor mounting plate.
Further, the first lower wire cutting driving rod group comprises a first lower wire cutting driving crank, a first crank connecting rod and a second crank connecting rod, wherein the first crank connecting rod is bent and extended, one end of the first lower wire cutting driving crank is provided with a first fixed swinging fulcrum, the other end of the first lower wire cutting driving crank is hinged with one end of the first crank connecting rod, the other end of the first crank connecting rod is fixed with one end of the second crank connecting rod, the other end of the second crank connecting rod is hinged with the first shear control board, and the first lower wire cutting roller is rotatably arranged on the first lower wire cutting driving crank.
Further, the second lower wire cutting driving rod group comprises a second lower wire cutting driving crank, a third crank connecting rod and a lower wire cutting connecting rod, one end of the second lower wire cutting driving crank is provided with a second fixed swinging fulcrum, the other end of the second lower wire cutting driving crank is hinged with one end of the third crank connecting rod, the other end of the third crank connecting rod is hinged with one end of the lower wire cutting connecting rod, the other end of the lower wire cutting connecting rod is hinged with the second shear control board, the lower wire cutting connecting rod is provided with a third fixed swinging fulcrum, and the second lower wire cutting roller is rotatably arranged on the second lower wire cutting driving crank.
Preferably, the driving motor is vertically installed and provided with a motor output shaft extending up and down, and the motor output shaft extends downwards from the lower end of the driving motor and is fixed with the driving cam.
Preferably, the first cam sliding groove and the second cam sliding groove are both formed in the lower end face of the driving cam, and the first cam sliding groove is located on the inner ring side of the second cam sliding groove.
Further, the change rule of the radius of the first cam chute is as follows: the radius of the lower cutting wire cutting section is unchanged and then gradually reduced, the tail end of the lower cutting wire cutting section is provided with a radius minimum value of the first cam sliding groove, the radius of the lower cutting wire section to be cut is gradually increased and then unchanged, the radius of the lower cutting wire cutting section is unchanged, and the radius of the lower cutting wire resetting section is unchanged.
Further, the change rule of the radius of the second cam chute is as follows: the radius of the lower cutting wire cutting section is unchanged, the radius of the lower cutting wire section to be cut is unchanged, the radius of the lower cutting wire cutting section is gradually increased, the tail end of the lower cutting wire cutting section is provided with the maximum value of the radius of the second cam sliding groove, and the radius of the lower cutting wire resetting section is gradually reduced and then unchanged.
Preferably, the first cam sliding groove and the second cam sliding groove further comprise a lower thread cutting idle stroke section, the lower thread cutting idle stroke section is located between the lower thread cutting reset section and the lower thread cutting open section, and the radius of the lower thread cutting idle stroke section is unchanged.
The invention also provides a buttonholing machine which is provided with a shell, wherein the lower thread cutting driving mechanism is arranged in the shell.
As described above, the lower 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 be through first lower cutting line actuating lever group and second lower cutting line actuating lever group's combined action, drive lower cutting line execution unit accomplish a cutting line circulation, because drive cam is 360 degrees rotary motion, but not swing, other mechanisms in the buttonholing machine (like last cutting line mechanism, lift presser foot mechanism etc.) all can 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, the structure of buttonholing machine 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 the buttonholing machine in the present application, and is a bottom view.
Fig. 2 and 3 are schematic structural views of a lower wire cutting driving mechanism in the present application.
Fig. 4 is a bottom view of fig. 2.
Fig. 5 is a bottom view of the drive cam of fig. 2.
Fig. 6 is a graph of the radius variation of the first cam runner and the second cam runner of the present application.
(wherein the drive motor is not shown in fig. 2 and 5.)
Description of element reference numerals
10. Lower thread cutting execution assembly
11. First scissors control board
12. Second scissors control board
30. Driving cam
31. First cam sliding groove
32. Second cam sliding groove
33. Lower trimming and cutting section
34. Lower cutting wire to-be-cut section
35. Lower trimming line segment
36. Lower trimming reset segment
37. Lower trimming idle stroke section
40. First lower trimming driving rod group
41. First lower thread cutting roller
42. First lower trimming driving crank
43. First crank connecting rod
44. Second crank connecting rod
50. Second lower wire cutting driving rod group
51. Second lower thread cutting roller
52. Second lower cutting line driving crank
53. Third crank connecting rod
54. Lower trimming connecting rod
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 a lower thread cutting driving mechanism, as shown in fig. 1 to 4, wherein the lower thread cutting driving mechanism is used for being connected with a lower thread cutting execution assembly 10 for cutting a bottom thread in a buttonholing machine, so that the lower thread cutting execution assembly 10 is arranged in the buttonholing machine and is positioned below a sewing table; the lower thread cutting execution assembly 10 has a structure belonging to the prior art, and a specific structure can be seen in a buttonhole machine JK-1790 model manufactured by jack sewing machine stock. Generally, the lower thread cutting executing assembly 10 in the buttonholing machine includes a first scissors control board 11, a second scissors control board 12, and a lower scissors assembly for cutting a bottom thread, and both the first scissors control board 11 and the second scissors control board 12 are driven to move by a lower thread cutting driving mechanism, thereby driving the lower scissors assembly to move, the lower scissors assembly including an open-close, and a walk position moving back and forth and left and right.
Further, as shown in fig. 1 to 5, the lower wire cutting driving mechanism is installed in the tail of the left end of the casing 80 of the buttonholing machine, and includes a driving motor, a driving cam 30 directly or indirectly driven to rotate by the driving motor, a first lower wire cutting driving lever group 40, and a second lower 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 a lower wire cutting open section 33, a lower wire cutting waiting section 34, a lower wire cutting section 35 and a lower wire cutting reset section 36 which are connected end to end in sequence. The first lower wire cutting driving rod set 40 is connected with a rotatable first lower wire cutting roller 41, the first lower wire cutting roller 41 is embedded into the first cam chute 31 of the driving cam 30 and is matched with the first cam chute 31, the first lower wire cutting driving rod set 40 is used for transmitting a motion track output by the driving cam 30 to the first lower wire cutting driving rod set 40, and the tail end of the first lower wire cutting driving rod set 40 is hinged with the first shear control board 11 and is used for controlling opening and closing of the lower shear assembly. The second lower wire cutting driving rod set 50 is connected with a rotatable second lower wire cutting roller 51, the second lower wire cutting roller 51 is embedded into the second cam chute 32 of the driving cam 30 and is matched with the second cam chute 32, so as to transfer the motion track output by the driving cam 30 to the second lower wire cutting driving rod set 50, and the tail end of the second lower wire cutting driving rod set 50 is hinged with the second scissor control board 12 and is used for controlling the running position of the lower scissor assembly.
In the operation process of the lower wire cutting driving mechanism with the above structure, the driving motor drives the driving cam 30 to rotate, the driving cam 30 drives the first cam sliding groove 31 to rotate relative to the first lower wire cutting roller 41, and drives the second cam sliding groove 32 to rotate relative to the second lower wire cutting roller 51, namely: the first lower wire cutting roller 41 relatively moves along the extending track of the first cam sliding groove 31, the second lower wire cutting roller 51 relatively moves along the extending track of the second cam sliding groove 32, and the first lower wire cutting roller 41 drives the first lower wire cutting driving rod group 40 to act, and the second lower wire cutting roller 51 drives the second lower wire cutting driving rod group 50 to act, so that the lower wire cutting assembly in the lower wire cutting executing assembly 10 is jointly driven to act, and the lower wire cutting assembly sequentially executes the cutting action, the waiting cutting action, the wire cutting action and the resetting action.
Specifically, when the buttonholing machine is used for stitching, the first lower thread cutting roller 41 and the second lower thread cutting roller 51 are both positioned at the head end of the lower thread cutting opening 33, the lower shear assembly is closed and clamps the bottom thread, the lower shear assembly is positioned at the initial position, the first lower thread cutting roller 41 is positioned at the head end of the lower thread cutting opening 33 in the first cam sliding groove 31, and the second lower thread cutting roller 51 is positioned at the head end of the lower thread cutting opening 33 in the second cam sliding groove 32. After starting the seam, the first lower thread cutting roller 41 in the first lower thread cutting driving rod group 40 relatively moves in the lower thread cutting opening section 33 in the first cam sliding groove 31, the second lower thread cutting roller 51 in the second lower thread cutting driving rod group 50 relatively moves in the lower thread cutting opening section 33 in the second cam sliding groove 32, so that the lower thread cutting assembly opens and loosens the upper thread, and the lower thread cutting assembly is driven to move to a position to be cut. Thereafter, the first lower wire cutting roller 41 of the first lower wire cutting driving rod group 40 relatively moves in the lower wire cutting section 34 of the first cam sliding groove 31, and the second lower wire cutting roller 51 of the second lower wire cutting driving rod group 50 relatively moves in the lower wire cutting section 34 of the second cam sliding groove 32, so that the lower wire cutting assembly is driven to move to the wire cutting position. Then, the first lower wire cutting roller 41 in the first lower wire cutting driving rod group 40 relatively moves in the lower wire cutting segment 35 in the first cam sliding groove 31, and the second lower wire cutting roller 51 in the second lower wire cutting driving rod group 50 relatively moves in the lower wire cutting segment 35 in the second cam sliding groove 32, so as to drive the lower wire cutting assembly to be closed, cut off the bottom wire and clamp the cut bottom wire. Finally, the first lower wire cutting roller 41 in the first lower wire cutting driving rod group 40 relatively moves in the lower wire cutting reset section 36 in the first cam sliding groove 31, the second lower wire cutting roller 51 in the second lower wire cutting driving rod group 50 relatively moves in the lower wire cutting reset section 36 in the second cam sliding groove 32, the lower wire cutting assembly is driven to clamp the bottom wire to move back to the initial position, the wire cutting cycle of one lower wire cutting action is completed, and the next wire cutting cycle is ready to start. The action time sequence of the lower scissors assembly 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 the drive cam 30 through driving motor and rotates a week, can be through the combined action of first lower cutting drive lever group 40 and second lower cutting drive lever group 50, the drive is cut line and is carried out subassembly 10 and accomplish a cutting cycle down, because drive cam 30 is 360 degrees rotary motion, but not swing, other mechanisms in the buttonholing machine (like go up 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 30, thereby reach greatly reduced cost, simplify the purpose of structure, the structure of buttonholing machine is compacter, be favorable to reducing the machine volume, improve whole aesthetic measure.
Preferably, as shown in fig. 2 to 4, the lower wire cutting driving mechanism further includes a motor mounting plate which is positioned in the housing 80 and is fixed to the housing 80, so that the position of the motor mounting plate is fixed, and the driving motor is fixed to the lower end surface of the motor mounting plate. In addition, the driving motor is vertically installed, so the driving motor is provided with a motor output shaft which extends up and down, and the motor output shaft extends downwards from the lower end of the driving motor and is directly fixed with the driving cam 30, thereby directly driving the driving cam 30 to rotate; therefore, the first cam runner 31 and the second cam runner 32 are both opened on the lower end surface of the driving cam 30, and the first cam runner 31 is located on the inner ring side of the second cam runner 32 and is concentrically arranged; of course, in other embodiments, the first cam runner 31 may be located on the outer ring side of the second cam runner 32, and both may be disposed concentrically. Because the driving motor is installed vertically, the driving motor can be built in the machine shell 80, and a plurality of mechanisms in the buttonholing machine can share one driving motor easily, so that the mechanisms are more compact, and the cost of the whole buttonholing machine is effectively reduced.
Further, as shown in fig. 2 to 4, the first lower wire driving rod set 40 includes a first lower wire driving crank 42, a first crank link 43 extending in a bending manner, and a second crank link 44, wherein the rear end of the first lower wire driving crank 42 is hinged to the casing 80, so that the rear end of the first lower wire driving crank 42 has a first fixed swing pivot O1, the front end of the first lower wire driving crank 42 is hinged to the left end of the first crank link 43, the right end of the first crank link 43 is fixed to the left end of the second crank link 44 by a screw, the right end of the second crank link 44 is hinged to the left end of the first scissor control board 11, and the first lower wire cutting roller 41 is rotatably mounted on the upper end surface of the first lower wire driving crank 42 by a pin extending up and down. The first lower wire cutting driving lever set 40 is a large-span four-lever mechanism, and when the first lower wire cutting roller 41 moves relative to the first cam chute 31 of the driving cam 30, the first lower wire cutting driving crank 42 swings around the first fixed swinging fulcrum O1 by a certain extent, so that the first cutter control board 11 is driven to act by the first crank connecting rod 43 and the second crank connecting rod 44, and then the lower cutter assembly is driven to execute related actions by the lower wire cutting executing assembly 10. Preferably, the first lower wire driving crank 42 is hinged to the casing 80, the first lower wire driving crank 42 is hinged to the first crank link 43, and the first crank link 43 is hinged to the first scissor control board 11 by an axial screw 70 extending up and down.
Further, as shown in fig. 2 to 4, the second lower wire driving lever set 50 includes a second lower wire driving crank 52, a third crank link 53, and a lower wire link 54, wherein the rear end of the second lower wire driving crank 52 is hinged to the casing 80, so that the rear end of the second lower wire driving crank 52 has a second fixed swing pivot O2, the front end of the second lower wire driving crank 52 is hinged to the left end of the third crank link 53, the right end of the third crank link 53 is hinged to the left end of the lower wire link 54, the right end of the lower wire link 54 is hinged to the second scissor control board 12, the left section of the lower wire link 54 is hinged to the casing 80 through a pin extending up and down, the lower wire link 54 has a third fixed swing pivot O3, and the second lower wire roller 51 is rotatably mounted on the second lower wire driving crank 52 through a pin extending up and down. The first lower wire cutting driving rod set 40 is a four-rod mechanism, and when the second lower wire cutting roller 51 moves relative to the second cam chute 32 of the driving cam 30, the second lower wire cutting driving crank 52 swings around the second fixed swinging fulcrum O2 by a certain extent, so that the third crank connecting rod 53 and the lower wire cutting connecting rod 54 drive the second scissor control board 12 to act, and further drive the lower scissor assembly to execute related actions through the lower wire cutting executing assembly 10. Preferably, the second lower wire cutting driving crank 52 is hinged to the casing 80, the second lower wire cutting driving crank 52 is hinged to the third crank link 53, the third crank link 53 is hinged to the lower wire cutting link 54, and the lower wire cutting link 54 is hinged to the second scissor control board 12 through an axle position screw 70 extending up and down.
In addition, the positional relationship of the respective constituent members of the first lower wire cutting driving lever group 40 and the second lower wire cutting driving lever group 50 is as follows: as shown in fig. 2 to 4, the first lower wire cutting drive crank 42 is located on the left side of the second lower wire cutting drive crank 52, the first crank link 43 is located on the front side of the third crank link 53, the second crank link 44 is located on the front side of the lower wire cutting link 54, and the first scissors control board 11 is located on the right side of the second scissors control board 12.
Preferably, the lower thread cutting driving mechanism shares the driving motor with the presser foot lifting mechanism in the buttonholing machine, so, as shown in fig. 5, the first cam runner 31 and the second cam runner 32 also both comprise a lower thread cutting idle section 37, the lower thread cutting idle section 37 is located between the lower thread cutting reset section 36 and the lower thread cutting open section 33, and the radius of the lower thread cutting idle section 37 is unchanged. Therefore, when the first lower wire cutting roller 41 in the first lower wire cutting driving rod group 40 relatively moves in the lower wire cutting idle stroke section 37 in the first cam sliding groove 31 and the second lower wire cutting roller 51 in the second lower wire cutting driving rod group 50 relatively moves in the lower wire cutting idle stroke section 37 in the second cam sliding groove 32, neither the first lower wire cutting driving rod group 40 nor the second lower wire cutting driving rod group 50 acts, so that the lower wire cutting driving mechanism does not act, nor does the lower cutter assembly act, but the presser foot lifting mechanism of the buttonholing machine acts, so that the lower wire cutting idle stroke section 37 is the presser foot lifting stroke section of the buttonholing machine.
Further, as shown in fig. 6, the radius of the first cam chute 31 has a change rule: the radius of the lower wire cutting and opening section 33 is unchanged and then gradually reduced, the tail end of the lower wire cutting and opening section is provided with a radius minimum value of the first cam sliding groove 31, the radius of the lower wire cutting and opening section 34 is gradually increased and then unchanged, the radius of the lower wire cutting and opening section 35 is unchanged, the radius of the lower wire cutting and opening section 36 is unchanged, and the radius of the lower wire cutting and opening section 37 is unchanged. The radius of the second cam chute 32 is changed according to the following rule: the radius of the lower trimming open section 33 is unchanged, the radius of the lower trimming to-be-trimmed section 34 is unchanged, the radius of the lower trimming cut section 35 is gradually increased, the tail end is provided with the maximum radius of the second cam sliding groove 32, the radius of the lower trimming reset section 36 is gradually reduced and then unchanged, and the radius of the lower trimming idle stroke section 37 is unchanged.
The present application also provides a buttonholing machine having a housing 80, in which housing 80 is mounted a lower wire cutting drive mechanism as described above.
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. The utility model provides a lower shear line actuating mechanism for be connected with lower shear line execution subassembly (10), lower shear line execution subassembly (10) include first scissors control panel (11), second scissors control panel (12) and be used for cutting lower scissors subassembly of bottom line, its characterized in that: the lower wire cutting driving mechanism comprises a driving motor, a driving cam (30) directly or indirectly driven to rotate by the driving motor, a first lower wire cutting driving rod group (40) and a second lower 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 a lower wire cutting opening cutting section (33), a lower wire cutting waiting section (34), a lower wire cutting section (35) and a lower wire cutting resetting section (36) which are connected end to end in sequence; the first lower wire cutting driving rod group (40) is provided with a rotatable first lower wire cutting roller (41), the first lower 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 lower wire cutting driving rod group (40) is hinged with the first shear control board (11) and used for controlling the opening and closing of the lower shear assembly; the second lower wire cutting driving rod group (50) is provided with a rotatable second lower wire cutting roller (51), the second lower 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 lower wire cutting driving rod group (50) is hinged with the second scissors control board (12) and used for controlling the position of the lower scissors assembly.
2. The lower wire cutting drive mechanism of claim 1, wherein: the motor driving device further comprises a motor mounting plate with a fixed position, and the driving motor is fixed on the lower end face of the motor mounting plate.
3. The lower wire cutting drive mechanism of claim 2, wherein: the first lower wire cutting driving rod group (40) comprises a first lower wire cutting driving crank (42), a first crank connecting rod (43) which is bent and extended and a second crank connecting rod (44), one end of the first lower wire cutting driving crank (42) is provided with a first fixed swinging fulcrum (O1), the other end of the first lower wire cutting driving crank (42) is hinged with one end of the first crank connecting rod (43), the other end of the first crank connecting rod (43) is fixed with one end of the second crank connecting rod (44), the other end of the second crank connecting rod (44) is hinged with the first shear control board (11), and the first lower wire cutting roller (41) is rotatably arranged on the first lower wire cutting driving crank (42).
4. The lower wire cutting drive mechanism of claim 2, wherein: the second lower wire cutting driving rod group (50) comprises a second lower wire cutting driving crank (52), a third crank connecting rod (53) and a lower wire cutting connecting rod (54), one end of the second lower wire cutting driving crank (52) is provided with a second fixed swinging fulcrum (O2), the other end of the second lower wire cutting driving crank (52) is hinged with one end of the third crank connecting rod (53), the other end of the third crank connecting rod (53) is hinged with one end of the lower wire cutting connecting rod (54), the other end of the lower wire cutting connecting rod (54) is hinged with the second shear control plate (12), the lower wire cutting connecting rod (54) is provided with a third fixed swinging fulcrum (O3), and the second lower wire cutting roller (51) is rotatably arranged on the second lower wire cutting driving crank (52).
5. The lower wire cutting drive mechanism as claimed in any one of claims 1-4, wherein: the driving motor is vertically installed and provided with a motor output shaft extending up and down, and the motor output shaft extends downwards from the lower end of the driving motor and is fixed with the driving cam (30).
6. The lower wire cutting drive mechanism as defined in claim 5, wherein: the first cam sliding groove (31) and the second cam sliding groove (32) are formed in the lower end face of the driving cam (30), and the first cam sliding groove (31) is located on the inner ring side of the second cam sliding groove (32).
7. The lower 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 lower cutting wire cutting section (33) is unchanged and gradually reduced, the tail end of the lower cutting wire cutting section is provided with a radius minimum value of the first cam sliding groove (31), the radius of the lower cutting wire section to be cut (34) is gradually increased and then unchanged, the radius of the lower cutting wire cutting section (35) is unchanged, and the radius of the lower cutting wire resetting section (36) is unchanged.
8. The lower 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 lower cutting wire opening cutting section (33) is unchanged, the radius of the lower cutting wire to-be-cut section (34) is unchanged, the radius of the lower cutting wire cutting section (35) is gradually increased, the tail end of the lower cutting wire cutting section is provided with the maximum radius of the second cam sliding groove (32), and the radius of the lower cutting wire resetting section (36) is gradually reduced and then unchanged.
9. The lower wire cutting drive mechanism of claim 1, wherein: the first cam sliding groove (31) and the second cam sliding groove (32) also comprise a lower thread cutting idle stroke section (37), the lower thread cutting idle stroke section (37) is positioned between a lower thread cutting reset section (36) and a lower thread cutting open section (33), and the radius of the lower thread cutting idle stroke section (37) is unchanged.
10. A buttonholing machine having a housing (80), characterized by: the lower 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 |
|---|---|---|---|
| CN201611075458.9A CN108118467B (en) | 2016-11-29 | 2016-11-29 | Lower thread cutting driving mechanism and buttonholing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611075458.9A CN108118467B (en) | 2016-11-29 | 2016-11-29 | Lower thread cutting driving mechanism and buttonholing machine |
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| CN108118467A CN108118467A (en) | 2018-06-05 |
| CN108118467B true CN108118467B (en) | 2023-07-14 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003154183A (en) * | 2001-11-26 | 2003-05-27 | Juki Corp | Lower thread cutter for sewing machine for buttonholing and sewing machine for buttonholing |
| CN101381932A (en) * | 2007-09-05 | 2009-03-11 | 兄弟工业株式会社 | Thread cutting apparatus for sewing machine |
| TW200912076A (en) * | 2007-09-11 | 2009-03-16 | Kaulin Mfg Co Ltd | Cutting-off device of threads in sewing machine |
| CN102154788A (en) * | 2011-03-31 | 2011-08-17 | 常州市工业缝纫机有限公司 | Trimming and presser foot lifting device of bar tack sewing machine |
| CN102234880A (en) * | 2010-04-28 | 2011-11-09 | 兄弟工业株式会社 | Sewing machine |
| CN105780326A (en) * | 2016-05-19 | 2016-07-20 | 拓卡奔马机电科技有限公司 | Thread trimming driving mechanism for sewing machine and sewing machine |
| CN206266840U (en) * | 2016-11-29 | 2017-06-20 | 拓卡奔马机电科技有限公司 | A kind of lower trimming drive mechanism and lockstitch button holder |
-
2016
- 2016-11-29 CN CN201611075458.9A patent/CN108118467B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003154183A (en) * | 2001-11-26 | 2003-05-27 | Juki Corp | Lower thread cutter for sewing machine for buttonholing and sewing machine for buttonholing |
| CN101381932A (en) * | 2007-09-05 | 2009-03-11 | 兄弟工业株式会社 | Thread cutting apparatus for sewing machine |
| TW200912076A (en) * | 2007-09-11 | 2009-03-16 | Kaulin Mfg Co Ltd | Cutting-off device of threads in sewing machine |
| CN102234880A (en) * | 2010-04-28 | 2011-11-09 | 兄弟工业株式会社 | Sewing machine |
| CN102154788A (en) * | 2011-03-31 | 2011-08-17 | 常州市工业缝纫机有限公司 | Trimming and presser foot lifting device of bar tack sewing machine |
| CN105780326A (en) * | 2016-05-19 | 2016-07-20 | 拓卡奔马机电科技有限公司 | Thread trimming driving mechanism for sewing machine and sewing machine |
| CN206266840U (en) * | 2016-11-29 | 2017-06-20 | 拓卡奔马机电科技有限公司 | A kind of lower trimming drive mechanism and lockstitch button holder |
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| CN108118467A (en) | 2018-06-05 |
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