CN109440312A - The control method of trimming and presser foot lifting device on a kind of sewing machine - Google Patents
The control method of trimming and presser foot lifting device on a kind of sewing machine Download PDFInfo
- Publication number
- CN109440312A CN109440312A CN201910023222.8A CN201910023222A CN109440312A CN 109440312 A CN109440312 A CN 109440312A CN 201910023222 A CN201910023222 A CN 201910023222A CN 109440312 A CN109440312 A CN 109440312A
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- presser
- trimming
- presser foot
- driving motor
- 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
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
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- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The present invention provides the control methods of trimming and presser foot lifting device on a kind of sewing machine, belong to clothes manufacturing equipment technical field.It solves the technical problems such as the thread-trimming lifter-presser foot driving device poor sensitivity of existing sewing machine, low efficiency.Sewing machine includes casing, base, presser bar, presser feet, trimming and presser foot lifting device include thread cutting mechanism, presser foot lifter axis, shear spool and driving motor, trimming cam and presser foot lifter cam are installed on the output shaft of driving motor respectively, trimming cam and presser foot lifter cam are provided with protrusion, and the protrusion of trimming cam and presser foot lifter cam is arranged in a staggered manner；Trimming cam is able to drive shear spool axial movement by trimming crank, and the end of shear spool is connected with thread cutting mechanism；Presser foot lifter cam is able to drive the rotation of presser foot lifter axis by presser foot lifter oscillating rod, and presser foot lifter axis is connected with presser bar.Above-mentioned trimming and presser foot lifting device are manipulated using special control method in the present invention, it is sensitive efficient, it is precisely reliable.
Description
Technical field
The invention belongs to clothes manufacturing equipment technical fields, are related to a kind of sewing machine, trimming on especially a kind of sewing machine
With the control method of presser foot lifting device.
Background technique
Sewing machine is formed one or more stitchings on sewing, is made one or more layers seam with one or more sewing thread
The machine that material interweaves or unites by a seam.Fabrics and leather, plastics, the paper such as function of sewing sewing cotton, fiber crops, silk, hair, staple fibre
Equal products, the stitching neat appearance stitched out, it is smooth securely, sewing velocity is fast, uses simplicity.Sewing machine is generally all filled by feeding
It sets, base, transmission and four part of attachment composition, is reasonably cooperated by the movement of each mechanism, cycle operation sutures sewing
Come.Sewing machine will use automatic shearing and automatic needle-foot-lifting function in sewing process；Sewing machine currently on the market is universal
It goes to respectively drive trimming and presser foot lifter function using the electromagnet of two different capacities, structure is complicated for the driving method, transmission effect
Rate is low, and electromagnet can generate impact noise, and easily fever, the failure rate of being powered for a long time are higher.
Chinese patent (notification number: CN207031720U, publication date: 2018-02-23) discloses a kind of sewing machine trimming lift
Presser feet list driving device, the first main shaft connected including stepper motor, presser foot lifting device and presser foot lifting device, cutting facility and
The second main shaft connected with cutting facility, the first main shaft and presser foot lifting device are connect by the bar assembly that links, stepper motor it is defeated
It is provided with the presser foot lifting device crank mechanism connected with the first main shaft on shaft and the cutting facility connected with the second main shaft is bent
Handle mechanism.Presser foot lifting device crank mechanism includes the first cam and the first crank, and first crank one end is fixed on the first main shaft,
The other end and the first cam are rotatablely connected；Cutting facility crank mechanism includes the second cam and the second crank, second crank one end
It is fixed on the second main shaft, the other end is connect with the second cam slide；It is provided with sliding shoe on second cam, is set on the second crank
It is equipped with the sliding groove being slidably matched with sliding shoe.The bar assembly that links includes the pull rod being arranged in above the first main shaft, is separately connected
The mandril of pull rod and the first main shaft；The third crank of driving mandril lifting is provided on first main shaft, third crank is provided with peace
It fills the cross through hole of the first main shaft and drives the interconnecting piece gone up and down on mandril.
Function in above patent document using stepper motor as driving source realization trimming and presser foot lifter, but its trimming
Mechanism is not suitable for being driven over long distances, and Structure adaptation ability is poor, and the control of its cam structure is not flexible and swift enough, and efficiency is lower.
Summary of the invention
The present invention addresses the above problems in the prior art, provides trimming and presser foot lifting device on a kind of sewing machine
Control method, the technical problems to be solved by the present invention are: how to improve the manipulation sensitivity of sewing machine thread-trimming lifter-presser foot driving
And high efficiency.
Object of the invention can be realized by the following technical scheme:
The control method of trimming and presser foot lifting device on a kind of sewing machine, sewing machine includes casing, base, setting described
Presser bar on casing and the presser feet that the presser bar lower end is arranged in, trimming and presser foot lifting device include thread cutting mechanism, lift
Presser feet axis, shear spool, driving motor and the foot pedal that the driving motor positive and negative rotation can be controlled；It is characterized in that, described
Thread cutting mechanism is arranged on the base and is located at the presser feet following location directly, and the driving motor is installed in the casing
On, trimming cam and presser foot lifter cam, the trimming cam and presser foot lifter are installed on the output shaft of the driving motor respectively
Cam all has protrusion, and the protrusion of the trimming cam and presser foot lifter cam is arranged in a staggered manner；The trimming cam is by cutting
Line crank is able to drive the shear spool axial movement, and the end of the shear spool is connected by swing rod with the thread cutting mechanism
And it is able to drive thread cutting mechanism and makees shearing motion；The presser foot lifter cam is able to drive the presser foot lifter by presser foot lifter oscillating rod
Axis rotation, the end of the presser foot lifter axis is connected with the presser bar by connecting plate and is able to drive the presser bar or more
It is mobile；The control method the following steps are included:
A, blowing: after sewing machine is switched on, flooring after foot pedal, rotate clockwise driving motor, presser bar and
Presser feet rises to preset height position under driving motor drive, and ready fabric to be sewed is placed on pressure by operator
Underfooting side；
B, it sews: unclamping foot pedal, driving motor is made to rotate counterclockwise to initial position, presser bar and presser feet reset,
Presser feet pushes down fabric, and operator manipulates sewing machine sewing pedal, and sewing machine is normally sewed until the wheel sewing process terminates；
C, it trimming: after operator's post legged foot pedal makes driving motor rotate counterclockwise several angles, then unclamps foot-operated
Plate rotates clockwise driving motor to return to origin, and thread cutting mechanism completes shear action under driving motor drive during this,
Realize trimming purpose；
D, feeding: flooring after foot pedal, rotates clockwise driving motor, and presser bar and presser feet are in driving motor band
Preset height position is risen under dynamic, operator takes out the fabric sewed below presser feet, and is put into and needs next time
Then the cloth of sewing unclamps foot pedal, driving motor rotates counterclockwise to initial position, and presser feet is put down, a sewing cycle
It completes.
By aforesaid operations method, complete entire sewing process, specific structure principle is as follows: sewing is completed to need trimming
When, driving motor receives master controller trimming signal, and the output shaft rotation of driving motor drives the rotation of trimming cam, trimming
Cam is moved axially by trimming crank handle turns shear spool, and shear spool drives swing rod to swing and then thread cutting mechanism is driven to do shearing fortune
It is dynamic, complete trimming action；Driving motor continues to move, and thread cutting mechanism resets, and then, the presser foot lifter in driving motor output shaft is convex
The protrusion of wheel drives the movement of presser foot lifter oscillating rod, and then drives the rotation of presser foot lifter axis, and presser foot lifter axis is driven by connecting plate again
Feet motion on presser bar and presser bar realizes presser foot lifter movement.When trimming process midway needs presser foot lifter, driving electricity
Machine reversion drives the rotation of presser foot lifter cam, and the protrusion of presser foot lifter cam drives the movement of presser foot lifter oscillating rod, and then drives lift pressure
The rotation of foot axis, presser foot lifter axis drive the feet motion on presser bar and presser bar by connecting plate again, realize presser foot lifter movement,
Then presser feet return is rotated forward.
Using driving motor driving thread cutting mechanism and presser feet in the technical program, substitution electromagnet reduces driving source,
Trimming cam and the driving method of presser foot lifter cam are connected using contact, and noise is small, more by the profile driving trip of cam
Add accurately and reliably, driving mechanism is designed as assembly module, and assembling is simple.
Actuating length is expanded by multiple link mechanisms in the technical program, it is only necessary to driving motor acts by a small margin,
It just can satisfy the demand of trimming action and presser foot lifter movement, driving motor positive and negative rotation drives trimming action and presser foot lifter dynamic
It is sensitiveer efficient when making.
In the technical program presser feet raising height can by master it is automatically controlled on operation panel be configured, the parameter of setting
The angle that driving motor rotation can be corresponded to, to realize the height-adjustable function of presser foot lifter.
The link assembly applicability of the link mechanism of trimming and presser foot lifter is extensive in the technical program, is applicable to driving electricity
Captain's distance transmission, realizes that driving motor position is arbitrarily arranged, the remote power that transmits completes trimming and presser foot lifter movement.Separately
Outside, trimming cam and presser foot lifter cam inertia are small, and flexibly, driving motor rotation commutation postpones lower, trimming and presser foot lifter for commutation
Be not in Caton, can reduce seam breakage ratio, and reduce the vibrating noise of presser foot lifter.
The control method of trimming and presser foot lifting device on another sewing machine is provided in the technical program, sewing machine includes machine
Shell, base are arranged presser bar on the housing and the presser feet of the presser bar lower end are arranged in, trimming and presser foot lifter dress
It sets including thread cutting mechanism, presser foot lifter axis, shear spool, driving motor and the foot-operated of the driving motor positive and negative rotation can be controlled
Plate；It is characterized in that, the thread cutting mechanism is arranged on the base and is located at the presser feet following location directly, the driving
Motor is fixed on the housing, is installed with trimming cam and presser foot lifter cam, institute on the output shaft of the driving motor respectively
It states trimming cam and presser foot lifter cam all has protrusion, the protrusion of the trimming cam and presser foot lifter cam is arranged in a staggered manner；
The trimming cam is able to drive the shear spool by trimming crank and moves axially, the end of the shear spool by swing rod with
The thread cutting mechanism, which is connected and is able to drive thread cutting mechanism, makees shearing motion；The presser foot lifter cam passes through presser foot lifter oscillating rod
It is able to drive the presser foot lifter axis rotation, the end of the presser foot lifter axis is connected with the presser bar by connecting plate and can
The presser bar is driven to move up and down；The control method the following steps are included:
A, blowing: after sewing machine is switched on, flooring after foot pedal, rotate clockwise driving motor, presser bar and
Presser feet rises to preset height position under driving motor drive, and ready fabric to be sewed is placed on pressure by operator
Underfooting side；
B, it sews: unclamping foot pedal, driving motor is made to rotate counterclockwise to initial position, presser bar and presser feet reset,
Presser feet pushes down fabric, and operator manipulates sewing machine sewing pedal, and sewing machine is normally sewed until the wheel sewing process terminates；
C, trimming and feeding: operator's post legged foot pedal rotates counterclockwise driving motor, according to trimming cam and
The change in location of the protrusion of presser foot lifter cam, the moving knife in thread cutting mechanism are first moved to the extreme position far from stationary knife, then
Moving knife return in thread cutting mechanism, thread cutting mechanism completes shear action during this, realizes trimming purpose；Simultaneously in thread cutting mechanism
In moving knife return during, risen under the drive of the presser foot lifter cam of presser bar and presser feet in driving motor output shaft
Preset height position, operator take out the fabric sewed below presser feet, and are put into the cloth for needing sewing next time,
Then post legged foot pedal, driving motor rotate counterclockwise to initial position, and presser feet is put down, and a sewing cycle is completed.
The operating process of the achievable sewing machine of above two control method, the first control method must trimming action knots
Presser foot lifter after beam, molar behavior time lengthen.Assuming that the moving knife in thread cutting mechanism goes out knife process, driving motor is rotated counterclockwise
It 90 °, returns knife driving motor and rotates clockwise 90 °, driving motor rotates clockwise 90 ° when presser foot lifter, and driving motor is completed entire
The rotation direction angle that movement needs to change is 270 °；Moving knife in second of control method in thread cutting mechanism is during returning knife
Foot lifting mechanism can according to need the adjustment for carrying out overall time, and trimming and presser foot lifter overall time shorten, it is assumed that cutting
The knife proceduredriven motor that goes out of moving knife rotates counterclockwise 90 ° in line mechanism, and driving motor rotates counterclockwise 90 ° when returning knife, simultaneously
Or presser foot lifter, molar behavior motor can be controlled in 180 ° later.The control mode of same structure, motor is different, time advance
1/3 completes entire movement, can be improved efficiency.
On above-mentioned sewing machine in the control method of trimming and presser foot lifting device, the driving motor is stepper motor；
The shear spool and the presser foot lifter axis parallel interval are arranged.Trimming cam and presser foot lifter cam in the technical program can be
Ellipse, the two can be spaced on the output shaft for being installed in driving motor, and signified long axis is that trimming is convex in the technical program
Longest line between wheel and two outer ends of presser foot lifter cam.By adjusting the long axis wire clamp of trimming cam and presser foot lifter cam
Angle angle, so that it may the minimum interval between trimming action and presser foot lifter movement is preset, to control thread cutting mechanism
Middle moving knife returns knife process relative to the interval time between presser foot lifter movement.
On above-mentioned sewing machine in the control method of trimming and presser foot lifting device, the thread cutting mechanism include upper tool post,
It is installed in the moving knife, lower slide and the stationary knife for being installed in the lower slide end of upper tool post end；The upper tool post activity is set
It sets on the base, the lower slide is installed on the base, and side opens up fluted, the pendulum in the middle part of the upper tool post
The end of bar plugs in the groove.
On above-mentioned sewing machine in the control method of trimming and presser foot lifting device, it is installed with mounting base on the casing,
The driving motor is fixed in the mounting base by connecting bolt；The shear spool is hinged in the mounting base, described
Presser foot lifter axis is rotatably provided on the casing.
On above-mentioned sewing machine in the control method of trimming and presser foot lifting device, the trimming cam and presser foot lifter cam
On also each have idle stroke portion, the Axisymmetric Distributed Line in idle stroke portion, the Axisymmetric Distributed Line of protrusion and institute on the trimming cam
The one of radial centre lines three of output shaft for stating driving motor is conllinear；The axis pair in the idle stroke portion on the presser foot lifter cam
Claim line, protrusion Axisymmetric Distributed Line and the driving motor the one of radial centre lines three of output shaft it is conllinear.It is described
Other various shapes can be set into idle stroke portion on trimming cam and presser foot lifter cam and the part between protrusion.
In above-mentioned technical proposal, driving motor rotate clockwise or counterclockwise be it is opposite, pass through adjust trimming cam
With presser foot lifter cam angle degree, thus it is possible to vary or exchange the rotation direction of driving motor.
Compared with prior art, the mounting structure in the present invention has the advantage that
1, the trimming in the present invention and presser foot lifting device substitute electromagnetism using driving motor driving thread cutting mechanism and presser feet
Iron is reduced driving source, trimming cam and the driving method of presser foot lifter cam and is connected using contact, and noise is small, passes through cam
Profile driving trip is more accurate and reliable, and driving mechanism is designed as assembly module, and assembling is simple.
2, the trimming in the present invention and presser foot lifting device are expanded actuating length by multiple link mechanisms, it is only necessary to be driven
Motor acts by a small margin, it will be able to meet the needs of trimming action and presser foot lifter movement, simultaneously because trimming cam and lift pressure
Foot cam all has symmetrically arranged two protrusions, and when trimming return starts presser foot lifter, when presser foot lifter movement is whole after trimming
Between shorten；Therefore it is sensitiveer efficient when driving motor positive and negative rotation driving trimming action and presser foot lifter act.
Detailed description of the invention
Fig. 1 is the mounting structure schematic diagram of trimming and presser foot lifting device.
Fig. 2 is the partial enlargement structural representation of trimming and presser foot lifting device.
Fig. 3 is the schematic perspective view of trimming and presser foot lifting device.
Fig. 4 is the partial enlargement structural representation in Fig. 3 at A.
In figure, 1, casing；2, base；3, presser bar；4, thread cutting mechanism；41, upper tool post；41a, groove；42, lower slide；
43, moving knife；44, stationary knife；5, driving motor；6, presser foot lifter axis；7, shear spool；8, trimming cam；9, presser foot lifter cam；9a, sky
Stroke portion；9b, protrusion；10, trimming crank；11, swing rod；12, presser foot lifter oscillating rod；13, connecting plate；13a, strip-shaped hole；14,
Mounting base；14a, mounting plate；15, bolt is connected；16, presser foot lifter spanner；16a, pulling part；17, presser foot lifter crank；18, it connects
Arm；19, wrench shaft；20, spanner crank；21, lift block；22, presser feet；23, axial screw；24, presser feet resetting shaft spring；25, it puts
Dynamic connecting rod；26, trimming resetting shaft spring；27, pulling plate；28, connecting plate crank.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
Embodiment one
As shown in Figures 1 to 4, sewing machine includes casing 1, base 2, the presser bar 3 being arranged on casing 1 in the present embodiment
And the presser feet 22 of 3 lower end of presser bar is set, trimming and presser foot lifting device include presser foot lifter axis 6, shear spool 7, can be positive and negative
The driving motor 5 that turns, the foot pedal that can control 5 positive and negative rotation of driving motor are located at 22 following location directly of presser feet on base 2 and set
The thread cutting mechanism 4 set, mounting base 14 is installed on casing 1, and driving motor 5 is fixed in mounting base 14 by connecting bolt 15；
Shear spool 7 is rotatably provided in mounting base 14, and presser foot lifter axis 6 is rotatably provided on casing 1, the output shaft of driving motor 5
Upper to be installed with trimming cam 8 and presser foot lifter cam 9 respectively, trimming cam 8 and presser foot lifter cam 9 all have protrusion 9b and null
Journey portion 9a, the Axisymmetric Distributed Line of idle stroke portion 9a, the Axisymmetric Distributed Line of protrusion 9b and driving motor 5 on trimming cam 8 it is defeated
The one of radial centre lines three of shaft is conllinear；The Axisymmetric Distributed Line of idle stroke portion 9a on presser foot lifter cam 9, protrusion 9b
The one of radial centre lines three of the output shaft of Axisymmetric Distributed Line and driving motor 5 is conllinear, trimming cam 8 and presser foot lifter cam
9 protrusion 9b is arranged in a staggered manner and the two offset angular is acute angle；Trimming cam 8 is able to drive shear spool by trimming crank 10
The end of 7 axial movements, shear spool 7, which is connected with thread cutting mechanism 4 by swing rod 11 and is able to drive thread cutting mechanism 4, makees shearing fortune
It is dynamic；Presser foot lifter cam 9 is able to drive the rotation of presser foot lifter axis 6 by presser foot lifter oscillating rod 12, and the end of presser foot lifter axis 6 passes through connection
Plate 13, which is connected with presser bar 3 and is able to drive presser bar 3, to be moved back and forth up and down.Further, presser foot lifter is hinged on casing 1
One end of spanner 16, presser foot lifter spanner 16 has pulling part 16a, and the upper end of presser foot lifter oscillating rod 12 is connected in presser foot lifter spanner 16
The other end, the lower end of presser foot lifter oscillating rod 12 extends downwardly and side can lean with presser foot lifter cam 9；Presser foot lifter axis 6
On be installed with presser foot lifter crank 17, the outer end of presser foot lifter crank 17 is hinged with linking arm 18, linking arm 18 and presser foot lifter spanner 16
It is connected by wrench shaft 19 and spanner crank 20；Lift block 21 is installed on presser bar 3, the end of presser foot lifter axis 6 is fixed
There is connecting plate crank 28, one end of connecting plate 13 and the outer end of connecting plate crank 28 are hinged, and the other end of connecting plate 13 opens up
There is the strip-shaped hole 13a along 13 length direction of connecting plate, is installed with the axial screw being plugged in strip-shaped hole 13a on lift block 21
23；Presser feet resetting shaft spring 24 is also arranged on presser foot lifter axis 6；Trimming crank 10 is installed on shear spool 7, and mounting base 14 is equipped with
Swing connecting bar 25, the upper end of swing connecting bar 25 are hinged in mounting base 14, and the lower end of swing connecting bar 25 is by connecting short slab and cutting
Line crank 10 is flexibly connected；Close to lower end tool there are two the mounting plate 14a of parallel interval setting, shear spool 7 slides mounting base 14
It is arranged on two mounting plate 14a, trimming crank 10 is located between two mounting plate 14a, and it is multiple that trimming is also arranged on shear spool 7
The both ends of position axis spring 26 and trimming resetting shaft spring 26 are respectively acting on trimming crank 10 and one of mounting plate 14a；Pendulum
The middle part of bar 11 is hinged on base 2, and the end of shear spool 7 is connected with pulling plate 27, pulling plate 27 and swing rod 11 by connecting column
One end is hinged, and the other end of swing rod 11 is connected with thread cutting mechanism 4.Thread cutting mechanism 4 includes upper tool post 41, is installed in upper tool post
Moving knife 43, lower slide 42 and the stationary knife 44 for being installed in 42 end of lower slide of 41 ends；Upper tool post 41 is movably arranged on base 2
On, lower slide 42 is installed on base 2, and 41 middle part side of upper tool post opens up fluted 41a, and the end of swing rod 11 is plugged in groove
In 41a.
Control method in the present embodiment the following steps are included:
A, blowing: after sewing machine is switched on, flooring after foot pedal, rotates clockwise driving motor 5, presser bar 3 with
And presser feet 22 rises to preset height position under the drive of driving motor 5, operator puts ready fabric to be sewed
It sets below presser feet 22；
B, it sews: unclamping foot pedal, driving motor 5 is made to rotate counterclockwise to initial position, presser bar 3 and presser feet 22 are multiple
Position, presser feet 22 push down fabric, and operator manipulates sewing machine sewing pedal, and sewing machine is normally sewed until the wheel sewing process knot
Beam；
C, it trimming: after operator's post legged foot pedal makes driving motor 5 rotate counterclockwise several angles, then unclamps foot-operated
Plate rotates clockwise driving motor 5 to return to origin, and it is dynamic to complete shearing under the drive of driving motor 5 for thread cutting mechanism 4 during this
Make, realizes trimming purpose；
D, feeding: flooring after foot pedal, rotates clockwise driving motor 5, and presser bar 3 and presser feet 22 are in driving electricity
Machine 5 rises to preset height position under driving, operator takes out the fabric sewed from 22 lower section of presser feet, and being put into need to
The cloth for wanting sew next time, then unclamps foot pedal, and driving motor 5 rotates counterclockwise to initial position, and presser feet 22 is put down, and one
Sewing cycle is completed.
Trimming and the concrete principle of presser foot lifter movement in the present embodiment are as follows: when sewing is completed to need trimming, driving motor 5 is connect
Master controller trimming signal is received, the output shaft rotation of driving motor 5 drives trimming cam 8 to rotate, trimming cam 8 is by cutting
Line crank 10 drives shear spool 7 to move axially, and shear spool 7 drives swing rod 11 to swing and then thread cutting mechanism 4 is driven to do shearing motion,
Complete trimming action；Driving motor 5 continues to move, and thread cutting mechanism 4 resets, and then, the presser foot lifter on 5 output shaft of driving motor is convex
The protrusion 9b of wheel 9 drives presser foot lifter oscillating rod 12 to move, and then presser foot lifter axis 6 is driven to rotate, and presser foot lifter axis 6 passes through connection again
Plate 13 drives the presser feet 22 on presser bar 3 and presser bar 3 to move, and realizes that presser foot lifter 22 acts.When trimming process midway needs
When presser foot lifter 22, the reversion of driving motor 5 drives presser foot lifter cam 9 to rotate, and the protrusion 9b of presser foot lifter cam 9 drives presser foot lifter pendulum
Lever 12 moves, and then presser foot lifter axis 6 is driven to rotate, and presser foot lifter axis 6 drives presser bar 3 and presser bar by connecting plate 13 again
Presser feet 22 on 3 moves, and realizes that presser foot lifter 22 acts, then rotates forward 22 return of presser feet.
Further, driving motor 5 is stepper motor in the present embodiment；Shear spool 7 is set with 6 parallel interval of presser foot lifter axis
It sets；The long axis included angle of trimming cam 8 and presser foot lifter cam 9 is 30 °~60 °；It is preferably 45 ° in the present embodiment.Trimming
Cam 8 and presser foot lifter cam 9 can be spaced on the output shaft for being installed in driving motor 5 for ellipse, the two, the present embodiment
The long axis of middle meaning is longest line between 9 two outer ends of trimming cam 8 and presser foot lifter cam.It is convex by adjusting trimming
The long axis included angle of wheel 8 and presser foot lifter cam 9, so that it may preset between trimming action and the movement of presser foot lifter 22 most
Small time interval efficiently requires to meet.
Embodiment two
The specific structure of trimming and presser foot lifting device in the present embodiment is the same as example 1, the difference is that, this
Control method in embodiment the following steps are included:
A, blowing: after sewing machine is switched on, flooring after foot pedal, rotates clockwise driving motor 5, presser bar 3 with
And presser feet 22 rises to preset height position under the drive of driving motor 5, operator puts ready fabric to be sewed
It sets below presser feet 22；
B, it sews: unclamping foot pedal, driving motor 5 is made to rotate counterclockwise to initial position, presser bar 3 and presser feet 22 are multiple
Position, presser feet 22 push down fabric, and operator manipulates sewing machine sewing pedal, and sewing machine is normally sewed until the wheel sewing process knot
Beam；
C, trimming and feeding: operator's post legged foot pedal rotates counterclockwise driving motor 5, according to trimming cam 8 with
And the change in location of the protrusion 9b of presser foot lifter cam 9, the moving knife in thread cutting mechanism 4 are first moved to the limit position far from stationary knife
It sets, then the moving knife return in thread cutting mechanism 4, thread cutting mechanism 4 completes shear action during this, realizes trimming purpose；Simultaneously
During moving knife return in thread cutting mechanism 4, the presser foot lifter of presser bar 3 and presser feet 22 on 5 output shaft of driving motor is convex
Preset height position is risen under the drive of wheel 9, operator takes out the fabric sewed from 22 lower section of presser feet, and is put into
The cloth for needing sew next time, then post legged foot pedal, driving motor 5 rotate counterclockwise to initial position, and presser feet 22 is put down, and one
A sewing cycle is completed.
Presser foot lifter 22 after the necessary trimming action of the first control method, molar behavior time lengthen.Assuming that thread trimmer
Moving knife in structure 4 goes out knife process, and driving motor 5 rotates counterclockwise 90 °, returns knife driving motor 5 and rotates clockwise 90 °, presser foot lifter
Driving motor 5 rotates clockwise 90 ° when 22, and driving motor 5 is completed entirely to act the rotation direction angle for needing to change to be 270 °；
Moving knife in control method in the present embodiment in thread cutting mechanism 4 22 mechanism of presser foot lifter during returning knife can according to need into
The adjustment of row overall time, trimming and 22 overall time of presser foot lifter shorten, it is assumed that in thread cutting mechanism 4 moving knife go out knife process
Driving motor 5 rotates counterclockwise 90 °, and driving motor 5 rotates counterclockwise 90 ° when returning knife, simultaneously or subsequently presser foot lifter 22, whole dynamic
180 ° are can be controlled in as motor.The control mode of same structure, motor is different, and time advance 1/3 is completed entirely to act, can
Further improve efficiency.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Although 1, casing is used more herein；2, base；3, presser bar；4, thread cutting mechanism；41, upper tool post；41a,
Groove；42, lower slide；43, moving knife；44, stationary knife；5, driving motor；6, presser foot lifter axis；7, shear spool；8, trimming cam；9, it lifts
Presser feet cam；9a, idle stroke portion；9b, protrusion；10, trimming crank；11, swing rod；12, presser foot lifter oscillating rod；13, connecting plate；
13a, strip-shaped hole；14, mounting base；14a, mounting plate；15, bolt is connected；16, presser foot lifter spanner；16a, pulling part；17, lift pressure
Foot crank；18, linking arm；19, wrench shaft；20, spanner crank；21, lift block；22, presser feet；23, axial screw；24, presser feet
Resetting shaft spring；25, swing connecting bar；26, trimming resetting shaft spring；27, pulling plate；28, the terms such as connecting plate crank, but be not precluded and make
A possibility that with other terms.The use of these items is only for be more convenient to describe and explain essence of the invention；It
To be construed to any additional limitation disagreed with spirit of that invention.
Claims (5)
1. the control method of trimming and presser foot lifting device on a kind of sewing machine, sewing machine includes that casing (1), base (2), setting exist
In the presser feet (22) of the presser bar (3) lower end, trimming and presser foot lifter fill presser bar (3) and setting on the casing (1)
It sets including thread cutting mechanism (4), presser foot lifter axis (6), shear spool (7), driving motor (5) and the driving motor can be controlled
(5) foot pedal of positive and negative rotation；It is characterized in that, the thread cutting mechanism (4) is arranged on the base (2) and is located at the presser feet
(22) following location directly, the driving motor (5) are installed on the casing (1), on the output shaft of the driving motor (5)
It is installed with trimming cam (8) and presser foot lifter cam (9) respectively, the trimming cam (8) and presser foot lifter cam (9) all have protrusion
The protrusion of portion (9b), the trimming cam (8) and presser foot lifter cam (9) is arranged in a staggered manner；The trimming cam (8) passes through trimming
Crank (10) is able to drive the shear spool (7) axial movement, and the end of the shear spool (7) is cut by swing rod (11) with described
Line mechanism (4), which is connected and is able to drive thread cutting mechanism (4), makees shearing motion；The presser foot lifter cam (9) is put by presser foot lifter
Lever (12) is able to drive the presser foot lifter axis (6) rotation, the end of the presser foot lifter axis (6) by connecting plate (13) with it is described
Presser bar (3), which is connected and is able to drive the presser bar (3), to be moved up and down；The control method the following steps are included:
A, blowing: after sewing machine is switched on, flooring after foot pedal, rotates clockwise driving motor (5), presser bar (3) with
And presser feet (22) rises to preset height position in the case where driving motor (5) drive, operator is by ready face to be sewed
Material is placed below presser feet (22)；
B, it sews: unclamping foot pedal, driving motor (5) is made to rotate counterclockwise to initial position, presser bar (3) and presser feet (22)
It resets, presser feet (22) pushes down fabric, and operator manipulates sewing machine sewing pedal, and sewing machine was normally sewed until the wheel was sewed
Journey terminates；
C, trimming: after operator's post legged foot pedal makes driving motor (5) rotate counterclockwise several angles, foot pedal is then unclamped
It rotates clockwise driving motor (5) and returns to origin, thread cutting mechanism (4) is completed to cut in the case where driving motor (5) drive during this
Movement is cut, realizes trimming purpose；
D, feeding: flooring after foot pedal, rotates clockwise driving motor (5), and presser bar (3) and presser feet (22) are driving
Motor (5) rises to preset height position under driving, operator takes out the fabric sewed below presser feet (22), and
It is put into the cloth for needing sewing next time, then unclamps foot pedal, driving motor (5) rotates counterclockwise to initial position, presser feet
(22) it puts down, a sewing cycle is completed.
2. the control method of trimming and presser foot lifting device on a kind of sewing machine, sewing machine includes that casing (1), base (2), setting exist
In the presser feet (22) of the presser bar (3) lower end, trimming and presser foot lifter fill presser bar (3) and setting on the casing (1)
It sets including thread cutting mechanism (4), presser foot lifter axis (6), shear spool (7), driving motor (5) and the driving motor can be controlled
(5) foot pedal of positive and negative rotation；It is characterized in that, the thread cutting mechanism (4) is arranged on the base (2) and is located at the presser feet
(22) following location directly, the driving motor (5) are installed on the casing (1), on the output shaft of the driving motor (5)
It is installed with trimming cam (8) and presser foot lifter cam (9) respectively, the trimming cam (8) and presser foot lifter cam (9) all have symmetrically
The protrusion of two protrusions being arranged, the trimming cam (8) and presser foot lifter cam (9) is arranged in a staggered manner；The trimming cam
(8) it is able to drive the shear spool (7) axial movement by trimming crank (10), the end of the shear spool (7) passes through swing rod
(11) it is connected with the thread cutting mechanism (4) and is able to drive thread cutting mechanism (4) and makees shearing motion；The presser foot lifter cam (9)
It is able to drive presser foot lifter axis (6) rotation by presser foot lifter oscillating rod (12), the end of the presser foot lifter axis (6) passes through connection
Plate (13), which is connected with the presser bar (3) and is able to drive the presser bar (3), to be moved up and down；The control method include with
Lower step:
A, blowing: after sewing machine is switched on, flooring after foot pedal, rotates clockwise driving motor (5), presser bar (3) with
And presser feet (22) rises to preset height position in the case where driving motor (5) drive, operator is by ready face to be sewed
Material is placed below presser feet (22)；
B, it sews: unclamping foot pedal, driving motor (5) is made to rotate counterclockwise to initial position, presser bar (3) and presser feet (22)
It resets, presser feet (22) pushes down fabric, and operator manipulates sewing machine sewing pedal, and sewing machine was normally sewed until the wheel was sewed
Journey terminates；
C, trimming and feeding: operator's post legged foot pedal rotates counterclockwise driving motor (5), according to trimming cam (8) with
And the change in location of the protrusion of presser foot lifter cam (9), the moving knife in thread cutting mechanism (4) are first moved to the limit position far from stationary knife
It sets, then the moving knife return in thread cutting mechanism (4), thread cutting mechanism (4) completes shear action during this, realizes trimming purpose；
Simultaneously during moving knife return in thread cutting mechanism (4), presser bar (3) and presser feet (22) are in driving motor (5) output shaft
On presser foot lifter cam (9) drive under rise to preset height position, operator will sew below the presser feet (22)
Fabric take out, and be put into the cloth for needing sewing next time, then post legged foot pedal, driving motor (5) rotates counterclockwise to just
Beginning position, presser feet (22) are put down, and a sewing cycle is completed.
3. the control method of trimming and presser foot lifting device on sewing machine according to claim 2, which is characterized in that the drive
Dynamic motor (5) are stepper motor；The shear spool (7) and presser foot lifter axis (6) parallel interval are arranged.
4. the control method of trimming and presser foot lifting device on sewing machine according to claim 2 or 3, which is characterized in that institute
Stating thread cutting mechanism (4) includes upper tool post (41), the moving knife (43) for being installed in upper tool post (41) end, lower slide (42) and fixed
Stationary knife (44) in the lower slide (42) end；The upper tool post (41) is movably arranged on the base (2), described to cut
Frame (42) is installed on the base (2), and side opens up fluted (41a) in the middle part of the upper tool post (41), the swing rod (11)
End be plugged in the groove (41a).
5. the control method of trimming and presser foot lifting device on sewing machine according to claim 2 or 3, which is characterized in that institute
It states and is installed on casing (1) mounting base (14), the driving motor (5) is fixed on the mounting base by connecting bolt (15)
(14) on；The shear spool (7) is rotatably provided on the mounting base (14), and the presser foot lifter axis (6) is hinged on the machine
On shell (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910023222.8A CN109440312B (en) | 2019-01-10 | 2019-01-10 | Control method of thread trimming and presser foot lifting device on sewing machine |
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|---|---|---|---|
| CN201910023222.8A CN109440312B (en) | 2019-01-10 | 2019-01-10 | Control method of thread trimming and presser foot lifting device on sewing machine |
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| CN109440312B CN109440312B (en) | 2020-09-29 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109722797A (en) * | 2019-03-23 | 2019-05-07 | 浙江美机缝纫机有限公司 | A kind of thread-trimming lifter-presser foot mechanism of sewing machine |
| CN110042579A (en) * | 2019-05-31 | 2019-07-23 | 阮健明 | A kind of thread-trimming lifter-presser foot mechanism and sewing machine |
| CN110453392A (en) * | 2019-09-15 | 2019-11-15 | 台州市速普机电有限公司 | A kind of thread-trimming lifter-presser foot integrated device |
| CN110453398A (en) * | 2019-07-31 | 2019-11-15 | 周琦 | For expanding the presser feet control method and its control mechanism of shell fabric |
| CN113235239A (en) * | 2021-06-08 | 2021-08-10 | 浙江奇师机电科技有限公司 | Driving wheel for trimming and lifting presser foot, sewing machine and control method |
| CN114164577A (en) * | 2021-11-17 | 2022-03-11 | 上海鲍麦克斯电子科技有限公司 | Thread trimming and presser foot device for stepping button sewing machine |
| CN115262113A (en) * | 2021-04-29 | 2022-11-01 | 杰克科技股份有限公司 | Thread cutting control method applied to sewing machine |
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| CN114164577A (en) * | 2021-11-17 | 2022-03-11 | 上海鲍麦克斯电子科技有限公司 | Thread trimming and presser foot device for stepping button sewing machine |
| CN114164577B (en) * | 2021-11-17 | 2023-05-26 | 上海鲍麦克斯电子科技有限公司 | Thread trimming and presser foot device for stepping button sewing machine |
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Address after: 318000 no.1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |
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