CN109537194A - A kind of sewing machine and automatic needle-foot-lifting trimming control method - Google Patents
A kind of sewing machine and automatic needle-foot-lifting trimming control method Download PDFInfo
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- CN109537194A CN109537194A CN201811455992.1A CN201811455992A CN109537194A CN 109537194 A CN109537194 A CN 109537194A CN 201811455992 A CN201811455992 A CN 201811455992A CN 109537194 A CN109537194 A CN 109537194A
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- presser foot
- foot lifter
- cam
- trimming
- presser
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- 238000009966 trimming Methods 0.000 title claims abstract description 72
- 238000009958 sewing Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000003447 ipsilateral effect Effects 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000013475 authorization Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
- D05B69/10—Electrical or electromagnetic drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention belongs to sewing device technical field, a kind of sewing machine and automatic needle-foot-lifting trimming control method are refered in particular to；Including presser foot lifter transmission mechanism, trimming transmission mechanism, it further include the cam for having motor and rotation being driven by motor, cam includes presser foot lifter cam part and trimming cam part, presser foot lifter cam part includes presser foot lifter portion and idle stroke portion one, the leading flank of trimming cam part is provided with tracks, tracks include wire shear part and idle stroke portion two, presser foot lifter portion and the ipsilateral setting in idle stroke portion two, wire shear part and the ipsilateral setting of idle stroke one, presser foot lifter transmission mechanism is connected by idler wheel and the outer wall of presser foot lifter cam part, trimming transmission mechanism is arranged in tracks by roller to be connect with trimming cam part, the first home position and the second home position are provided on cam；A motor of the invention can carry out automatic shearing respectively and automatic needle-foot-lifting movement overall structure is more compact, reduce the production cost of sewing machine, reduce noise.
Description
Technical field:
The invention belongs to sewing device technical field, a kind of sewing machine and automatic needle-foot-lifting trimming control method are refered in particular to.
Background technique:
Currently, generally being equipped with automatic needle-foot-lifting mechanism and automatic shearing mechanism on sewing machine, auto lifting pressure is realized respectively
The movement of foot and automatic shearing reduces labour to save the time, improves working efficiency.If Authorization Notice No. is CN
A kind of sewing-machine automatic needle-foot-lifting mechanism disclosed in 203938857 U Chinese utility model patents, if application publication number is CN
A kind of automatic thread severing device of sewing machine disclosed in the Chinese invention patent application of 102877230 A is two sets of mutually independent machines
Structure, respectively by two different driving source drive actions.Common driving source is electromagnet or cylinder, have structure is complicated, at
The defects of noise is big when this height, use.
Summary of the invention:
The object of the present invention is to provide a kind of seams for carrying out automatic shearing and automatic needle-foot-lifting movement respectively by a motor
It threads machine and automatic needle-foot-lifting trimming control method.
The present invention is implemented as follows:
One of purpose of the invention is to provide a kind of sewing machine, including presser foot lifter transmission mechanism, trimming transmission mechanism,
It further include the cam for having motor and rotation being driven by motor, the cam includes presser foot lifter cam part and trimming cam part, lift pressure
Foot cam part includes presser foot lifter portion and idle stroke portion one, and the leading flank of trimming cam part is provided with tracks, the movement rail
Road includes wire shear part and idle stroke portion two, and presser foot lifter portion and the ipsilateral setting in idle stroke portion two, wire shear part and idle stroke one are ipsilateral
Setting, the presser foot lifter transmission mechanism are connected by idler wheel and the outer wall of presser foot lifter cam part, the trimming transmission mechanism
It is arranged by roller and is connect with trimming cam part in tracks, the first home position and second original is provided on cam
The movement of position, the motor is controlled by controller.
In a kind of above-mentioned sewing machine, the axis collinear of the shaft in the presser foot lifter portion, idle stroke portion one and motor, lift
The diameter of pressing part is greater than the diameter in idle stroke portion one, and presser foot lifter portion and idle stroke portion one seamlessly transit.
In a kind of above-mentioned sewing machine, the idle stroke portion two is parabolic trough, and the wire shear part is arc-shaped
The closed loop configuration of groove, circular groove and parabolic trough, the center and parabolic trough open end of circular groove
Center be respectively positioned on the axis of machine shaft.
In a kind of above-mentioned sewing machine, the presser foot lifter transmission mechanism includes presser foot lifter small lever, and idler wheel setting is being lifted
The front end of one end of presser feet small lever, the other end and presser feet axis connection of presser foot lifter small lever, presser feet axis passes through presser feet arm and pressure
Foot connection, the presser feet axis are rotatably arranged on casing, and the rotation of motor driven cam drives idler wheel in the outer of presser foot lifter cam part
It is rolled on side wall, when idler wheel is located at presser foot lifter portion and then drives the rotation of presser feet axis, realize the movement of presser foot lifter.
In a kind of above-mentioned sewing machine, it is arranged with axle sleeve on the presser feet axis, axle sleeve is installed in casing, presser feet axis energy
It is rotated in axle sleeve, one end of axle sleeve is provided with necking part, forms step surface, presser foot lifter small lever between reducing diameter part and axle sleeve
The other end be set on reducing diameter part, be additionally provided on presser feet axis and be installed with retaining ring, the limit of the other end of presser foot lifter small lever
Between step surface and retaining ring, it is provided with abutting part one on retaining ring, the other end of presser foot lifter small lever is provided with abutting part
Two, presser foot lifter small lever acts on abutting part one by abutting part two around axle sleeve rotation and drives the rotation of presser feet axis.
In a kind of above-mentioned sewing machine, the trimming transmission mechanism includes cursor, and one end of cursor passes through shaft
Portion is rotatably connected on casing, one end of the other end and tangent line drive link connects, the other end and shift fork of tangent line drive link
One end connection, the middle part of shift fork is rotatably connected on casing by axial screw, and the other end of shift fork is provided with fork, tangent line
Connecting rod is connect by tangent line link pin with fork, and the other end of tangent line connecting rod is fixedly connected with slitter shaft, and cutter setting is being cut
On cutter shaft, slitter shaft is rotatably arranged on knife rest, and roller is arranged on cursor, and roller is in the tracks of trimming cam part
Roll drive cursor rotate axle portion rotation.
In a kind of above-mentioned sewing machine, it is provided with circlip on the slitter shaft, bullet is provided between circlip and knife rest
One end of spring, spring is held out against on circlip, and the other end is held out against on the end face of knife rest.
In a kind of above-mentioned sewing machine, the trimming cam part is an integral structure with presser foot lifter cam part.
In a kind of above-mentioned sewing machine, the motor is stepper motor or grating electromechanical.
It is a further object to provide a kind of automatic needle-foot-lifting trimming control methods, include the following steps:
S1, judge that cam is located at the first home position or the second home position by controller；
S2, when cam is located at the first home position, judge input signal for trimming or presser foot lifter by controller；
S3,1) when controller judges input signal for presser foot lifter, control cam, which rotates counterclockwise, is located at idler wheel contact
Presser foot lifter movement is realized at presser foot lifter cam part；
2) judge whether presser foot lifter movement is completed by controller, if not completing, cam is remained stationary, if completing, control is cut
Cam is rotated counterclockwise to the second home position；
3) when controller judges input signal for trimming, control cam, which rotates clockwise, makes roller be located at trimming cam part
Parabolic trough when start trimming action；After the completion of trimming, control cam is clockwise to the second home position；
S4, when cam is located at the second home position, judge input signal for trimming or presser foot lifter by controller；
S5,1) when controller judges input signal for presser foot lifter, control cam, which rotates clockwise, is located at idler wheel contact
Presser foot lifter movement is realized at presser foot lifter portion；
2) judge whether presser foot lifter movement is completed by controller, if not completing, cam is remained stationary, if completing, is controlled convex
Wheel is clockwise to the first home position；
3) when controller judges input signal for trimming, control cam, which rotates counterclockwise, makes roller be located at trimming cam part
Parabolic trough when start trimming action；After the completion of trimming, control cam is clockwise to the first home position.
The advantage that the present invention protrudes compared with prior art is:
A motor of the invention can carry out automatic shearing respectively and automatic needle-foot-lifting acts, and overall structure is more compact,
It reduces the production cost of sewing machine, reduce noise, improve the performance of sewing machine, improve the stability of sewing machine, improve
Working efficiency.
Detailed description of the invention:
Fig. 1 is one of stereoscopic schematic diagram of the invention；
Fig. 2 is the two of stereoscopic schematic diagram of the invention；
Fig. 3 is the schematic diagram of cam of the invention；
Fig. 4 is the schematic diagram that cam of the invention is located at the first home position；
Fig. 5 is the schematic diagram that cam of the invention is located at the second home position；
Fig. 6 is control process flow chart of the invention；
Fig. 7 is the perspective view of the explosion of foot lifting mechanism of the invention.
In figure: 1, motor；2, presser foot lifter cam part；3, trimming cam part；4, presser foot lifter portion；5, idle stroke portion one；6, it cuts
Line portion；7, idle stroke portion two；8, idler wheel；9, roller；10, the first home position；11, the second home position；12, the small thick stick of presser foot lifter
Bar；13, presser feet axis；14, presser feet arm；15, presser feet；16, cursor；17, slitter shaft；18, cutter；19, knife rest；20, tangent line drives
Dynamic connecting rod；21, shift fork；22, tangent line connecting rod；23, tangent line link pin, 24, circlip；25, spring；26, axle sleeve；27, reducing diameter part；
28, retaining ring；29, abutting part one；30, abutting part two.
Specific embodiment:
With specific embodiment, the invention will be further described below, referring to Fig. 1-7:
One of purpose of the invention is to provide a kind of sewing machine, including presser foot lifter transmission mechanism, trimming transmission mechanism,
It further include having motor 1 and the cam by the driving rotation of motor 1, the motor 1 is stepper motor or grating electromechanical, and the present embodiment is excellent
Select stepper motor.The cam includes presser foot lifter cam part 2 and trimming cam part 3, and presser foot lifter cam part 2 includes presser foot lifter portion 4
With idle stroke portion 1, the leading flank of trimming cam part is provided with tracks, and the tracks include wire shear part 6 and sky
Stroke portion 27, presser foot lifter portion 4 and the ipsilateral setting in idle stroke portion 27, wire shear part 6 and the ipsilateral setting of idle stroke 1, the lift pressure
Foot transmission mechanism is connected by idler wheel 8 and the outer wall in presser foot lifter roller cam portion 2, and the trimming transmission mechanism passes through roller
9 settings are connect in tracks with trimming cam part 3, and the first home position 10 and the second home position are provided on cam
11, at the first home position 10, the second home position 11, idler wheel 8 is located along the same line with roller 9.The motor moves
Work is controlled by controller.Motor driven can realize relevant parameter by controlling and adjusting the rotational angle of the shaft of motor
It controls and adjusts, such as control and adjusting and the control and adjusting of trimming dynamics to presser foot lifter height, to be suitable for different thickness
The sewing etc. of the cloth of degree.
Further, the axis collinear of the shaft in presser foot lifter portion 4, idle stroke portion 1 and motor 1, the diameter in presser foot lifter portion 4
Greater than idle stroke portion 1, presser foot lifter portion 4 and idle stroke portion 1 are seamlessly transitted.
Further, the idle stroke portion 27 is parabolic trough, and the wire shear part 6 is circular groove, arc-shaped
The closed loop configuration of groove and parabolic trough, the center of circular groove and the center of parabolic trough open end are respectively positioned on
On the axis of 1 shaft of motor.
The present invention integrates foot lifting mechanism and thread cutting mechanism, is driven by the same motor 1, can make structure
It is more compact, ease of assembly, and noise is reduced, improve quality.
Further, the presser foot lifter transmission mechanism includes presser foot lifter small lever 12, and idler wheel 8 is arranged in presser foot lifter small lever
12 one end, the other end are connected on presser feet axis 13, and the front end of presser feet axis 13 is connect by presser feet arm 14 with presser feet 15, the pressure
Foot axis 13 is rotatably arranged on casing, and motor 1 drives cam rotation, and idler wheel 8 is driven to roll on the lateral wall of presser foot lifter cam part 2
It is dynamic, the movement of presser foot lifter is realized when idler wheel 8 is located at presser foot lifter portion.When idler wheel 8 is located at the vertex in presser foot lifter portion, 15 quilt of presser feet
Lift to extreme higher position.
Specifically, it is arranged with axle sleeve 26 on the presser feet axis 13, axle sleeve 26 is installed in casing, and presser feet axis 13 can be in axle sleeve
Rotation, is provided with reducing diameter part 27 in one end of axle sleeve 26, forms step surface between reducing diameter part 27 and axle sleeve 26, presser foot lifter is small in 26
The other end of lever 12 is set on reducing diameter part 27, is additionally provided on presser feet axis 13 and is installed with retaining ring 28, presser foot lifter small lever
12 other end limits between step surface and retaining ring 28, abutting part 1 is provided on retaining ring 28, in presser foot lifter small lever
12 other end is provided with abutting part 2 30, and presser foot lifter small lever 12 acts on abutting by abutting part 2 30 around the rotation of axle sleeve 26
Portion 1 drives presser feet axis 13 to rotate.In the case that the active force of abutting part 2 30 disappears, presser feet axis 13 resets, and structure is tight
It gathers.
The structure of the presser foot lifter transmission mechanism can also use:
Including first connecting rod, with the swingle between swing, swingle is arranged on motor mount by pin, rotation
One end of bull stick and one end of first connecting rod are hinged, and idler wheel is arranged on the other end of first connecting rod, the other end of swingle with
One end of second connecting rod is hinged, wherein the tie point of second connecting rod and swingle, the center of pin and first connecting rod and swingle
Tie point be in angular distribution, the other end of second connecting rod and one end of third connecting rod are hinged, the connection of the other end of third connecting rod
On presser feet axis.
In order to realize the reset of each component, reduction torsion spring is additionally provided on presser feet axis, reduction torsion spring one end is connected to machine
On shell, the other end is connected on third connecting rod.
Since above structure is complex, the structure of the preferred presser foot lifter small lever 12 of the present embodiment.
Further, the trimming transmission mechanism includes cursor 16, and one end of cursor 16 is rotated by shaft to be connected
It connects on casing, one end connection of the other end and tangent line drive link 20, the other end and the shift fork 21 of tangent line drive link 20
One end connection, the middle part of shift fork 21 are rotatably connected on casing by axial screw, and the other end of shift fork 21 is provided with fork, cuts
Line connecting rod 22 is connect by tangent line link pin 23 with fork, and the other end of tangent line connecting rod 22 is fixedly connected with slitter shaft 17；It cuts
Knife 18 is arranged on slitter shaft 17, and slitter shaft 17 is rotatably arranged on knife rest 19, and roller 9 is arranged on cursor 16, and roller 9 exists
It is rolled in the tracks of trimming cam part 3 and cursor 16 is driven to rotate axle portion rotation.The slitter shaft 17 and tangent line connecting rod 22
Between by spline connect, can also by flat key connect or the screw by being arranged radially be fixedly connected.
Further, it is provided with circlip 24 on the slitter shaft 17, spring 25 is provided between circlip 24 and knife rest 19,
One end of spring 25 is held out against on circlip 24, and the other end is held out against on the end face of knife rest 19, and the setting of spring 25 may insure to cut
Knife 18 and stationary knife keep tension, improve trimming effect.
Further, the trimming cam part 3 is an integral structure with presser foot lifter cam part 2.It can certainly be designed to
Split type structure is separately fixed in the shaft of motor 1, and is rotated synchronously with the shaft of motor 1.The present embodiment trimming cam part
3 are an integral structure with presser foot lifter cam part 2, and structure is more compact, easier for installation.
The trimming transmission mechanism can also be using such as flowering structure:
Including tangent line drive link, the upper end of tangent line drive link is provided with roller, the lower end of tangent line drive link and pendulum
Swing arm is hinged, and the other end of swing arm is fixedly connected with slitter shaft, and the middle part of swing arm is rotatably connected on machine by axial screw
On shell, the reduction torsion spring for driving each part to reset is provided on axial screw.
It is a further object to provide a kind of automatic needle-foot-lifting trimming control methods, include the following steps:
S1, judge that cam is located at the first home position 10 or the second home position 11 by controller；
S2, when cam is located at the first home position 10, judge input signal for trimming or presser foot lifter by controller；
S3,1) when controller judges input signal for presser foot lifter, control cam, which rotates counterclockwise, is located at the contact of idler wheel 8
Realize presser foot lifter movement in the presser foot lifter portion of presser foot lifter cam part 2；The height of presser foot lifter is configured according to the thickness of cloth, is passed through
Fabric thickness detection device, such as: the Hall sensor and magnet being separately positioned on presser feet arm 14 and casing, or pass through foot pedal
Control the height of presser foot lifter, controller realizes the dynamic of presser foot lifter 15 according to the rotational angle of the signal control motor 1 received
Make.When the vertex of the rolling of idler wheel 8 to presser foot lifter portion, at this point, presser feet 15 is lifted to highest.
2) judge whether presser foot lifter movement is completed by controller, if not completing, cam is remained stationary, if completing, is controlled convex
Wheel is rotated counterclockwise to the second home position 11；
3) when controller judges input signal for trimming, control cam, which rotates clockwise, makes roller 9 be located at trimming cam
Start trimming action when the parabolic trough in portion 3；After the completion of trimming, control cam is clockwise to the second home position
11；
S4, when cam is located at the second home position 11, judge input signal for trimming or presser foot lifter by controller；
S5,1) when controller judges input signal for presser foot lifter, control cam, which rotates clockwise, is located at the contact of idler wheel 8
Presser foot lifter movement is realized at presser foot lifter portion 2；
2) judge whether presser foot lifter movement is completed by controller, if not completing, cam is remained stationary, if completing, is controlled convex
Wheel is clockwise to the first home position 10；
3) when controller judges input signal for trimming, control cam, which rotates counterclockwise, makes roller 9 be located at trimming cam
Start trimming action when the parabolic trough in portion 3；After the completion of trimming, control cam is clockwise to the first home position
10。
Presser foot lifter of the invention is independent of each other between the two with trimming, is non-interference, guarantees between each mechanism of sewing machine
It operates normally.
Above-described embodiment is only one of presently preferred embodiments of the present invention, and but not intended to limit the scope of the present invention, therefore:
The equivalence changes that all shape, structures under this invention, principle are done, should all be covered by within protection scope of the present invention.
Claims (10)
1. a kind of sewing machine, including presser foot lifter transmission mechanism, trimming transmission mechanism, it is characterised in that: further include have motor (1) and
By the cam of motor (1) driving rotation, the cam includes presser foot lifter cam part (2) and trimming cam part (3), presser foot lifter cam
Portion (2) includes presser foot lifter portion (4) and idle stroke portion one (5), and the leading flank of trimming cam part (3) is provided with tracks, described
Tracks include wire shear part (6) and idle stroke portion two (7), and presser foot lifter portion (4) and the ipsilateral setting in idle stroke portion two (7) is cut
Line portion (6) and the ipsilateral setting of idle stroke one (5), the presser foot lifter transmission mechanism pass through idler wheel (8) and presser foot lifter cam part (2)
Outer wall connects, and the trimming transmission mechanism is connect in tracks with trimming cam part (3) by roller (9) setting,
The first home position (10) and the second home position (11) are provided on cam, the movement of the motor (1) is by controller control
System.
2. a kind of sewing machine according to claim 1, it is characterised in that: the presser foot lifter portion (4), idle stroke portion one (5)
And the axis collinear of the shaft of motor (1), the diameter of presser foot lifter portion (4) are greater than the diameter in idle stroke portion one (5), presser foot lifter portion
(4) it is seamlessly transitted with idle stroke portion one (5).
3. a kind of sewing machine according to claim 1, it is characterised in that: the idle stroke portion two (7) is parabola shaped recessed
Slot, the wire shear part (6) be circular groove, the closed loop configuration of circular groove and parabolic trough, circular groove
The center of center and parabolic trough open end is respectively positioned on the axis of motor (1) shaft.
4. a kind of sewing machine according to claim 1-3, it is characterised in that: the presser foot lifter transmission mechanism includes
Presser foot lifter small lever (12), idler wheel (8) are arranged in one end of presser foot lifter small lever (12), the other end of presser foot lifter small lever (12)
It is connect with presser feet axis (13), the front end of presser feet axis (13) is connect by presser feet arm (14) with presser feet (15), the presser feet axis (13)
It is rotatably arranged on casing, motor (1) drives cam rotation, and idler wheel (8) is driven to roll on the lateral wall of presser foot lifter cam part (2)
It is dynamic, when idler wheel (8) is located at presser foot lifter portion (4) and then presser feet axis (13) rotation is driven, realizes the movement of presser foot lifter (15).
5. a kind of sewing machine according to claim 4, it is characterised in that: be arranged with axle sleeve on the presser feet axis (13)
(26), axle sleeve (26) is installed in casing, and presser feet axis (13) can rotate in axle sleeve (26), is provided in one end of axle sleeve (26)
Reducing diameter part (27), forms step surface between reducing diameter part (27) and axle sleeve (26), the other end of presser foot lifter small lever (12) is set in
On reducing diameter part (27), it is additionally provided with and is installed with retaining ring (28) on presser feet axis (13), the other end limit of presser foot lifter small lever (12)
Position is between step surface and retaining ring (28), and (28) are provided with abutting part one (29) on retaining ring, in presser foot lifter small lever (12)
The other end is provided with abutting part two (30), and presser foot lifter small lever (12) is acted on around axle sleeve (26) rotation by abutting part two (30)
Abutting part one (29) drives presser feet axis (13) rotation.
6. a kind of sewing machine according to claim 1-3, it is characterised in that: the trimming transmission mechanism includes turning
Swing arm (16), one end of cursor (16) is rotatably connected on casing by shaft, the other end and tangent line drive link (20)
One end connection, the other end of tangent line drive link (20) connect with one end of shift fork (21), and shift fork passes through axis in the middle part of (21)
Position screw is rotatably connected on casing, and the other end of shift fork (21) is provided with fork, and tangent line connecting rod (22) passes through tangent line link pin
(23) it is connect with fork, and the other end of tangent line connecting rod (22) is fixedly connected with slitter shaft (17), cutter (18) is arranged in cutter
On axis (17), slitter shaft (17) is rotatably arranged on knife rest (19), and roller (9) is arranged on cursor (16), and roller (9) is being cut
It is rolled in the tracks in line cam portion (3) and cursor (16) is driven to rotate axle portion rotation.
7. a kind of sewing machine according to claim 6, it is characterised in that: be provided with circlip on the slitter shaft (17)
(24), spring (25) are provided between circlip (24) and knife rest (19), one end of spring (25) is held out against on circlip (24), separately
One end is held out against on the end face of knife rest (19).
8. a kind of sewing machine according to claim 1, it is characterised in that: the trimming cam part (3) and presser foot lifter cam
Portion (2) is an integral structure.
9. a kind of sewing machine according to claim 1, it is characterised in that: the motor (1) is stepper motor (1) or grating
Motor (1).
10. a kind of automatic needle-foot-lifting trimming control method of such as described in any item sewing machines of claim 1-9, feature exist
In: include the following steps:
S1, judge that cam is located at the first home position (10) or the second home position (11) by controller；
S2, when cam is located at the first home position (10), judge input signal for trimming or presser foot lifter by controller；
S3,1) when controller judges input signal for presser foot lifter, control cam, which rotates counterclockwise, makes idler wheel (8) contact be located at lift
Presser foot lifter movement is realized at presser feet cam part (2)；
2) judge whether presser foot lifter movement is completed by controller, if not completing, cam is remained stationary, if completing, control cam is inverse
Hour hands turn to the second home position (11)；
3) when controller judges input signal for trimming, control cam, which rotates clockwise, makes roller (9) be located at trimming cam part
(3) start trimming action when parabolic trough；After the completion of trimming, control cam is clockwise to the second home position
(11)；
S4, when cam is located at the second home position (11), judge input signal for trimming or presser foot lifter by controller；
S5,1) when controller judges input signal for presser foot lifter, control cam, which rotates clockwise, makes idler wheel (8) contact be located at lift
Presser foot lifter movement is realized at pressing part；
2) judge whether presser foot lifter movement is completed by controller, if not completing, cam is remained stationary, if completing, control cam is suitable
Hour hands turn to the first home position (10)；
3) when controller judges input signal for trimming, control cam, which rotates counterclockwise, makes roller be located at trimming cam part (3)
Parabolic trough when start trimming action；After the completion of trimming, control cam is clockwise to the first home position (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811455992.1A CN109537194B (en) | 2018-11-30 | 2018-11-30 | Sewing machine and automatic presser foot lifting and thread cutting control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811455992.1A CN109537194B (en) | 2018-11-30 | 2018-11-30 | Sewing machine and automatic presser foot lifting and thread cutting control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109537194A true CN109537194A (en) | 2019-03-29 |
| CN109537194B CN109537194B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811455992.1A Active CN109537194B (en) | 2018-11-30 | 2018-11-30 | Sewing machine and automatic presser foot lifting and thread cutting control method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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