CN107447377A - A kind of sewing machine - Google Patents
A kind of sewing machine Download PDFInfo
- Publication number
- CN107447377A CN107447377A CN201710851772.XA CN201710851772A CN107447377A CN 107447377 A CN107447377 A CN 107447377A CN 201710851772 A CN201710851772 A CN 201710851772A CN 107447377 A CN107447377 A CN 107447377A
- Authority
- CN
- China
- Prior art keywords
- connecting portion
- work feed
- shank
- eccentric wheel
- sewing machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
- D05B27/04—Work-feeding means with feed dogs having horizontal and vertical movements arranged above the workpieces
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/10—Work-feeding means with rotary circular feed members
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/14—Needle-bar drives
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The present invention provides a kind of sewing machine, head, feed lifting rock shaft, cloth pushing shaft, lift tooth eccentric wheel, work feed eccentric wheel and link are pricked including main shaft, upper axle, needle bar crank, shank, shank, link is driven by needle bar crank, pumped along the bearing of trend of shank, and shank bundle head is connected with link, both geo-stationaries；Lift tooth eccentric wheel or work feed eccentric wheel are fixed on main shaft, and lift tooth eccentric wheel is provided with first connecting portion, and work feed eccentric wheel is provided with second connecting portion, and first connecting portion and second connecting portion are mutually socketed；When cloth feeding mechanism is in work feed state, first connecting portion and second connecting portion geo-stationary；When adjusting work feed eccentric angle, first connecting portion and second connecting portion relatively rotate.The application can provide larger shank puncture force and can adjust the work feed bias time, and then lift the thick material adaptability of sewing machine.
Description
Technical field
The present invention relates to a kind of sewing machine.
Background technology
At present, as depicted in figs. 1 and 2, the needle bar drive device in sewing machine mainly includes upper axle 100, is fixed on axle
Needle bar crank 200, shank connecting rod 300, the shank 400 extended up and down on 100 and the shank being fixed on shank 400 are pricked
First 500, the both ends of shank connecting rod 300 are pricked first 500 with needle bar crank 200 and shank respectively and are hinged；Upper axle 100 is turned by motor driving
Dynamic, upper axle 100 drives the synchronous axial system of needle bar crank 200, therefore needle bar crank 200 moves in a circle, and then passes through shank connecting rod 300
Drive shank to prick first 500 to pump, it is final to drive shank 400 and eedle 600 installed in the lower end of shank 400 synchronous
Ground pumps.When eedle punctures cloth required downward puncture force by motor by some row mechanisms finally by
Needle bar crank passes to shank, is understood according to analysis：Needle bar crank is at the position shown in Fig. 2, eedle starts to puncture cloth downwards
Material.Now, the load transfer analysis of needle bar drive device is as shown in Figure 3：The active force that needle bar crank provides is F1, and eedle punctures cloth
Puncture force be F4, puncture force F4 is also the component that shank pricks head in the vertical direction, is also subject to straight down for shank
Active force；F1 is decomposed, then F1 along the component F2=F1*cos α on shank length of connecting rod direction, prick head and exist by shank
The suffered directed force F 3=F2 along shank length of connecting rod direction, therefore shank pricks the component F4=F3*cos of head in the vertical direction
β=F1*cos α * cos β.As can be seen here：In above-mentioned needle bar drive device, puncture force F4 on shank is finally transmitted to significantly
The defects of ground reduces, and shank puncture force is not enough when sewing thickness material be present so as to cause needle bar drive device, sewing effect is undesirable,
In addition, the active force that needle bar crank provides is easy to cause sewing machine complete machine oscillation, noise big for component of the F1 in other directions
The problems such as；If wanting to obtain larger shank puncture force, the motor of larger torque must be provided, this will certainly synchronously increase F1
Component in other directions, increase vibration and the noise of sewing machine complete machine.
Further, as shown in figure 4, cloth feeding mechanism in sewing machine mainly include by motor-driven rotation main shaft 700,
The feed lifting rock shaft 800 parallel with main shaft 700 and cloth pushing shaft 900, the eccentric wheel being fixed on main shaft 700, lift tooth gear unit and
Work feed gear unit；As shown in figure 5, eccentric wheel axially includes lift tooth linkage section, main shaft linkage section and work feed linkage section along it, it is main
Axis connection section is fixed on main shaft using screw, lift tooth connecting portion be eccentric in main shaft connecting portion and by lift tooth gear unit with
Feed lifting rock shaft 800 is connected, and work feed linkage section is eccentric in main shaft connecting portion and is connected by work feed gear unit with cloth pushing shaft 900
Connect.When main shaft 700 rotates, band movable eccentric wheel synchronous axial system, realize that main shaft 700 drives by lifting tooth linkage section and lift tooth gear unit
Dynamic feed lifting rock shaft 800 swings and realizes that main shaft 700 drives cloth pushing shaft 900 to swing by work feed linkage section and work feed gear unit,
Feed lifting rock shaft 800 acts on retainer, driving retainer is swung up and down, and cloth pushing shaft 900 acts on retainer, driving retainer swing, most
Driving retainer and the feed dog on retainer move along default work feed track eventually, realize work feed.In above-mentioned cloth feeding mechanism,
Eccentric wheel is an one-piece parts, is fixed by screws on main shaft, so as to the phase for causing work feed eccentric between lift tooth bias
Position is immobilized, and then causes the work feed bias time to change.But in the thick material of sewing, it is necessary to which work feed is eccentric
Adjusted after time the several years, the not smooth situation of work feed otherwise occurs；Obviously, cloth feeding mechanism of the prior art can not meet above-mentioned need
Ask.
The content of the invention
In view of the above the shortcomings that prior art, it is an object of the invention to provide a kind of sewing machine, and it can be provided
Larger shank puncture force, and the work feed bias time can be adjusted within the specific limits.
To achieve the above object, the present invention provides a kind of sewing machine, including main shaft, upper axle, the shank song for being fixed on axle
Handle, the shank extended up and down, the shank bundle head for being fixed on shank, feed lifting rock shaft, cloth pushing shaft, lift tooth eccentric wheel, work feed eccentric wheel, company
It is connected on the lift tooth gear unit lifted between tooth eccentric wheel and feed lifting rock shaft and is connected to sending between work feed eccentric wheel and cloth pushing shaft
Cloth gear unit, the main shaft and upper axle are driven by motor-driven rotation, in addition to link, the link by needle bar crank
Move, pumped along the bearing of trend of shank, the shank bundle head is connected with link, both geo-stationaries；It is described
Lift tooth eccentric wheel or work feed eccentric wheel are fixed on main shaft, and the lift tooth eccentric wheel is provided with first connecting portion, and the work feed is eccentric
Wheel is provided with second connecting portion, and the first connecting portion and second connecting portion are mutually socketed；When cloth feeding mechanism is in work feed state
When, first connecting portion and the second connecting portion geo-stationary；When adjusting work feed eccentric angle, the first connecting portion and second
Connecting portion relatively rotates.
Further, in addition to be articulated with needle bar crank driving sliding block and position fix guide holder, the link
In have along the first chute extended before and after the direction of upper axle and the rail portion extended up and down, in the guide holder
With the second chute extended up and down, the driving sliding block is engaged with the first chute and can be along the extension side of the first chute
Slided in the first chute, the rail portion is engaged with the second chute and can be along the bearing of trend of the second chute
Slided in two chutes, the shank pricks head and is connected to rail portion.
Further, in addition to the connecting pin parallel with upper axle, the needle bar crank are provided with prominent sliding block connection
Portion, one end of the connecting pin are fixed in sliding block connecting portion, and the driving sliding block is rotatably installed on the another of connecting pin
End.
Preferably, the link is T-shaped, including the horizontal part of front and rear extension and the vertical portion that extends up and down, and described
One chute is opened in horizontal part, and the vertical portion forms the rail portion.
Further, the host cavity of accommodating first connecting portion is offered in the second connecting portion；The first connecting portion
Outer peripheral face on offer neck along the circumferentially extending of first connecting portion, be threaded with clamp screw in the second connecting portion
Nail, the end of the holding screw is located in neck and abutted against with first connecting portion.
Preferably, the neck is V-shaped groove, and the end of the holding screw has the conus portion being adapted with V-shaped groove.
Further, regulation otch is offered in the first connecting portion, and first connecting portion is at the both ends of regulation otch
Place has the first otch end face and the second otch end face respectively；The second connecting portion is provided with the regulation prominent to regulation otch
Connecting portion, described adjust in connecting portion are threaded with adjusting screw, the end of the adjusting screw and the first otch end face phase
Abut.
Preferably, the first connecting portion is provided with accepting hole in the second otch end, and bullet is provided with the accepting hole
Spring, one end of the spring are mutually fixed with first connecting portion, and the other end and the regulation connecting portion of spring abut against.
Preferably, the end of the adjusting screw has the hemisphere face abutted against with the first otch end face.
Preferably, the second connecting portion offers operation otch at regulation connecting portion, and the adjusting screw is from operation
Incision is exposed.
As described above, sewing machine of the present invention, has the advantages that：
First, for the directed force F 1 that needle bar crank provides after decomposition, the active force of its in the vertical direction passes through link
It is directly passed to shank and pricks head and shank, so as to provides larger shank puncture force；Secondly, when sewing machine is shut down, pass through
First connecting portion and second connecting portion relatively rotate the folder realized and adjusted within the specific limits between work feed bias and lift tooth bias
Angle, so as to change the work feed bias time, and in sewing machine operation process, pass through the relative of first connecting portion and second connecting portion
It is static to realize that each self-driven feed lifting rock shaft and cloth pushing shaft are swung, so that sewing machine adjusts work feed inclined after disclosure satisfy that during thick material sewing
The demand of heart time, the final thick material adaptability for lifting sewing machine.
Brief description of the drawings
Fig. 1 is the structural representation of sewing machine in the prior art.
Fig. 2 is the structural representation of needle bar drive device in Fig. 1.
Fig. 3 is the load transfer analysis figure of needle bar drive device in Fig. 2.
Fig. 4 is the structural representation of cloth feeding mechanism in the prior art.
Fig. 5 is the structural representation of work feed eccentric wheel in Fig. 4.
Fig. 6 is the structural representation of sewing machine in the application.
Fig. 7 is that the structural representation after saving casing and lower section casing is omitted in Fig. 6.
Fig. 8 is the structural representation of needle bar drive device in the application.
Fig. 9 is the connection diagram of needle bar crank and driving sliding block in the application.
Figure 10 is the structural representation of link in the application.
Figure 11 is the structural representation that shank pricks head in the application.
Figure 12 is the load transfer analysis figure of needle bar drive device in the application.
Figure 13 is the structural representation of cloth feeding mechanism in the application.
Figure 14 is the connection diagram of main shaft, lift tooth eccentric wheel and work feed eccentric wheel in the application.
Figure 15 is the connection diagram that tooth eccentric wheel and work feed eccentric wheel are lifted in the application, and the figure is explosive view.
Figure 16 is the structural representation that tooth eccentric wheel is lifted in the application.
Figure 17 is the structural representation of work feed eccentric wheel in the application.
Figure 18 is the structural representation that tooth gear unit is lifted in the application.
Figure 19 and Figure 20 is the structural representation of work feed gear unit in the application.
Figure 21 is the schematic diagram of work feed bias time adjustment in the application.
Component label instructions
The work feed eccentric wheel of axle 16 on 1
The second connecting portion of 2 needle bar crank 161
The host cavity of 21 sliding block connecting portion 162
3 shanks 163 adjust connecting portion
4 shanks prick first 164 operation otch
The work feed connecting portion of 41 mounting hole 165
The 42 connection holding screws of axle portion 17
The conus portion of 5 link 171
The adjusting screw of 51 first chute 18
The hemisphere face of 52 rail portion 181
The spring of 53 horizontal part 19
The retainer of 54 vertical portion 20
55 through holes 201 first drive chute
551 first through hole 202 second drive chute
552 second through holes 221 lift tooth connecting rod
56 connecting holes 222 lift tooth driving crank
The 6 driving sliding blocks of sliding block 223 first
The sliding block of 7 guide holder 224 second
The work feed connecting rod of 71 second chute 231 first
The work feed connecting rod of 8 connecting pin 232 second
The work feed of 81 flange 233 drives crank
The 9 spacing cloth feeding cranks of pressing plate 234
The work feed connecting rod of 10 copper sheathing 235 the 3rd
Casing 241 is saved on 11 and adjusts support shaft
12 main shafts 242 adjust crank
The needle gage of 121 first shaft part 243 adjusts connecting rod
122 second shaft parts 244 adjust copper sheathing
The adjusting screw rod of 13 feed lifting rock shaft 245
The limited block of 14 cloth pushing shaft 246
The 15 section casings of lift tooth eccentric wheel 25 times
The feed dog of 151 first connecting portion 26
152 necks
153 regulation otch
154 first otch end faces
155 second otch end faces
156 accepting holes
157 lift tooth connecting portions
Embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
It should be clear that structure, ratio, size etc. that this specification accompanying drawing is painted, only coordinating in disclosed in specification
Hold, so that those skilled in the art understands and reads, be not limited to the enforceable qualifications of the present invention, therefore do not have skill
Essential meaning in art, the modification of any structure, the change of proportionate relationship or the adjustment of size, it can be produced not influenceing the present invention
Under the effect of raw and the purpose that can reach, all should still it fall in the range of disclosed technology contents can be covered.Together
When, the term of cited such as " on ", " under " in this specification, "left", "right", " centre " and " one ", it is merely convenient to chat
State clearly, and be not used to limit the enforceable scope of the present invention, its relativeness is altered or modified, and technology is being changed without essence
Inside hold, when being also considered as the enforceable category of the present invention.
In following examples, all directions are defined as follows：The axial direction of main shaft 12 is defined as left and right directions, and the court of main shaft 12
Left direction is defined as to one end of head of sewing machine, one end of main shaft 12 towards sewing machine tail is defined as right direction；Therefore, such as
Shown in Fig. 6, the left side of paper is left direction, and the right side of paper is right direction, and the upside of paper is upper direction, and the downside of paper is
Lower direction, the positive side of paper are rear to the dorsal part of paper is front direction.
As shown in Figure 6 and Figure 7, the application provides a kind of sewing machine, the particularly needle bar drive device in sewing machine and sent
Cloth mechanism, by needle bar drive device improvement realize on the premise of the torque of original motor is not changed, can provide compared with
Big shank puncture force, realized by the improvement to cloth feeding mechanism and adjust the work feed bias time within the specific limits, below with regard to pin
Bar drive mechanism and the expansion narration of the structure of cloth feeding mechanism.
First, the needle bar drive device in sewing machine
As shown in fig. 6, needle bar drive device is arranged in the upper section casing 11 of sewing machine.As shown in Figure 7 and Figure 8, shank
Drive mechanism is included by the upper axle 1 of motor-driven rotation, the needle bar crank 2 for being fixed on upper axle 1, the shank 3 extended up and down, fixation
Driven in the shank bundle first 4 and link 5, the link 5 of shank 3 by needle bar crank 2, along the bearing of trend of shank 3
Lower reciprocating motion, the shank bundle first 4 is connected with link 5, both geo-stationaries.The needle bar crank 2 is enclosed on axle 1
Left end, and the screw by being radially extended along upper axle 1 is fixed on upper axle 1.More preferably, on the drive connection frame 5 of needle bar crank 2
Under reciprocating preferred structure be：As shown in Fig. 8 to Figure 10, needle bar drive device also includes being articulated with the left end of needle bar crank 2
The driving sliding block 6 in face, position are fixed and are fixed on positioned at the guide holder 7 on the right side of shank 3, the guide holder 7 by multiple screws
Upper section casing 11；Offer on the right side of the upper end of link 5 and slided along first extended before and after the direction of upper axle 1
Groove 51, the lower end of link 5 have the rail portion 52 extended up and down；The guide holder 7 is towards opening up on the left side of link 5
There is the second chute 71 extended up and down；The driving sliding block 6 is engaged with the first chute 51 and being capable of prolonging along the first chute 51
Direction is stretched to slide in the first chute 51；The rail portion 52 is engaged with the second chute 71 and can be along the second chute 71
Bearing of trend slides in the second chute 71；The rail portion 52 is connected with shank bundle first 4, both geo-stationaries.
During above-mentioned needle bar drive device operating, the upper axle 1 of motor driving rotates, and upper axle 1 drives needle bar crank 2 synchronously to do circle
Zhou Yundong, needle bar crank 2 is by driving mutual cooperation and the chute 71 of rail portion 52 and second of the chute 51 of sliding block 6 and first
Mutual cooperation drive connection frame 5 can only pump, link 5 directly drives shank to prick first 4, shank 3 and be arranged on
The eedle of the lower end of shank 3 synchronously pumps.Understood according to analysis：Needle bar crank 2 is at the position shown in Figure 12, machine
The highest order that pin is in its stroke, now, eedle also begin to puncture cloth downwards；Compared with prior art, provided in motor
On the premise of identical torque, the active force that needle bar crank 2 provides also is F1, and needle bar crank 2 passes to the downward effect of link 5
Power is F5, then F5=F1*cos γ；And link 5 directly transfers the force to shank and pricks first 4 and shank 3, therefore shank 3 is worn
Pierce power F6=F5=F1*cos γ, its with the prior art use the connecting rod indirect drive of shank 3 after shank 3 puncture force F4=
F1*cos α * cos β are compared, and the application adds the puncture force of shank 3 on the premise of original motor torque is not changed, so as to
The thick material adaptability of sewing machine is lifted, while component of the directed force F 1 in other directions of the offer of needle bar crank 2 is provided, most
Mitigate vibration and the noise of sewing machine complete machine eventually.
In above-mentioned needle bar drive device, the mutual cooperation of driving sliding block 6 and the first chute 51 causes needle bar crank 2 rotating
When, link 5 can be made to produce reciprocating motion in the vertical direction；Limit is played in the mutual cooperation of the chute 71 of rail portion 52 and second
Position effect so that link 5 can only move back and forth in the vertical direction.Pumped to further improve shank 3
Stability, as shown in figure 8, be cased with copper sheathing 10 on the shank 3, copper sheathing 10 is tightly arranged in upper section casing 11, risen
To guide effect.
It is described driving sliding block 6 and needle bar crank 2 articulated structure be：As shown in figure 9, needle bar drive device also includes left and right
The connecting pin 8 of extension, the needle bar crank 2 are provided with prominent sliding block connecting portion 21, and the right-hand member of the connecting pin 8 is fixed on cunning
In block connecting portion 21, the driving sliding block 6 is rotatably installed on the left end of connecting pin 8.In the present embodiment, the driving sliding block
6 be square structure, is contacted with the cell wall of the first chute 51 for face；There is a circle flange 81, the flange 81 on the connecting pin 8
Between needle bar crank 2 and driving sliding block 6.
The shank prick first 4 and the attachment structure of link 5 be：As shown in Figure 10 and Figure 11, the shank prick first 4 towards
The right-hand member of link 5 is provided with connection axle portion 42 axially extending to the right, and left and right is offered in the rail portion 52 of the link 5 and is passed through
Logical connecting hole 56, the connection axle portion 42 are located in connecting hole 56 and coordinated with the gap of connecting hole 56；Therefore, connection is worked as
When frame 5 pumps, link 5 directly drives shank bundle first 4 and shank 3 synchronously to pump.
The shank prick first 4 and the attachment structure of shank 3 be：As shown in Figure 8 and Figure 11, the shank is pricked in first 4 and opened up
There is the mounting hole 41 of up/down perforation, the shank 3 is located in mounting hole 41, and shank pricks first 4 and reuses screw lock in shank 3
On.
Further, as shown in Figure 10, the link 5 is T-shaped, including the horizontal part 53 of front and rear extension and extension up and down
Vertical portion 54, first chute 51 be opened in horizontal part 53 and it is front and rear insertion horizontal part 53, the vertical portion 54 is formed
The rail portion 52.In addition, multiple through holes 55 interconnected are offered on the link 5, and in multiple through holes 55, a part
Through hole 55 is connected with the first chute 51 and is defined as first through hole 551, and another part through hole 55 is connected with the second chute 71
Lead to and be defined as the second through hole 552, first through hole extends about 551, the 552 front and rear extension of the second through hole, and first through hole 551
Intersect with the second through hole 552 and then so that first through hole 551 is connected with the second through hole 552；The first through hole 551 and
It is filled with lubricating oil line or lubricant grease in two through holes 552, therefore the lubricating oil or lubricant grease of the conveying of lubricating oil line flow into the
In one chute 51 and the second chute 71, to greatly reduce the cell wall of the driving chute 51 of sliding block 6 and first and rail portion 52 and the
Frictional force between the cell wall of two chutes 71 so that needle bar drive device is durable in use, caused noise is small.It is, of course, also possible to
The cell wall of cell wall and the second chute 71 to the first chute 51 is processed by shot blasting and Surface hardening treatment, further reduces and rubs
Wipe, improve the case hardness of the cell wall of the first chute 51 and the cell wall of the second chute 71.More preferably, the material of the driving sliding block 6
Matter is copper, more wear-resisting；The material of the link 5 is aluminium, has the function that lightweight.
Preferably, as shown in figure 8, the guide holder 7 the second chute 71 towards shank prick first 4 left side on by more
Individual screw is installed with the spacing pressing plate 9 arranged before and after two pieces, and the second chute 71 is smaller than preceding between two pieces of spacing pressing plates 9
The upward width in rear, also, the left side of rail portion 52 and the right side of spacing pressing plate 9 abut against, and then by rail portion 52
Remain in the second chute 71.
2nd, the cloth feeding mechanism in sewing machine
As shown in fig. 6, cloth feeding mechanism is arranged in the lower section casing 25 of sewing machine.It is described to send as shown in Figure 13 to Figure 17
Cloth mechanism includes main shaft 12, feed lifting rock shaft 13, cloth pushing shaft 14, lift tooth eccentric wheel 15, work feed eccentric wheel 16, is connected to lift tooth eccentric wheel
Lift tooth gear unit between 15 and feed lifting rock shaft 13 and the work feed transmission being connected between work feed eccentric wheel 16 and cloth pushing shaft 14
Unit, the main shaft 12, feed lifting rock shaft 13 are parallel with the three of cloth pushing shaft 14, all axially extending in left-right direction, and the lift tooth is eccentric
Wheel 15 and work feed eccentric wheel 16 are two separate parts, and the lift tooth eccentric wheel 15 or work feed eccentric wheel 16 are fixed on master
Axle 12；Especially, the left end of the lift tooth eccentric wheel 15 is provided with first connecting portion 151, and the right-hand member of the work feed eccentric wheel 16 is set
There is second connecting portion 161, the first connecting portion 151 and second connecting portion 161 are mutually socketed；When cloth feeding mechanism is in work feed shape
During state, first connecting portion 151 and second connecting portion 161 geo-stationary so that lift tooth eccentric wheel 15 and work feed eccentric wheel 16
With the synchronous axial system of main shaft 12.The first connecting portion 151, second connecting portion 161 and main shaft 12 are coaxially disposed, also, the lift
The right-hand member of tooth eccentric wheel 15, which has, to be eccentric in the lift tooth connecting portion 157 of first connecting portion 151, is used to be connected with lift tooth gear unit
Connect, the left end of the work feed eccentric wheel 16, which has, to be eccentric in the work feed connecting portion 165 of second connecting portion 161, is used for and work feed passes
Moving cell is connected.In addition, the main shaft 12 is directly driven by a motor rotation, main shaft 12 and upper axle 1 can pass through toothed belt transmission
Mechanism is connected so that motor synchronously drives axle 1 to rotate.
The sewing machine of above-mentioned cloth feeding mechanism is installed in operation process, due to first connecting portion 151 and second connecting portion
161 geo-stationaries so that it is also geo-stationary to lift tooth eccentric wheel 15 and work feed eccentric wheel 16.Therefore, 12 turns of motor drive shaft
Dynamic, main shaft 12 drives lift tooth eccentric wheel 15 and the synchronous axial system of work feed eccentric wheel 16, and lift tooth eccentric wheel 15 is by lifting tooth gear unit
Driving feed lifting rock shaft 13 is swung, and feed lifting rock shaft 13 acts on retainer 20, driving retainer 20 is swung up and down；Meanwhile work feed eccentric wheel 16 is logical
Cross work feed gear unit driving cloth pushing shaft 14 to swing, cloth pushing shaft 14 acts on retainer 20, the driving swing of retainer 20；So that
Obtain retainer 20 and do work feed motion with the feed dog 26 for being fixed on the upper end of retainer 20, and the movement locus of retainer 20 and feed dog 26 is
The synthesis for moving up and down and moving forward and backward, therefore be elliptic motion trace, as shown in figure 21.Under normal circumstances, it is eccentric to lift tooth
The relative position between the work feed connecting portion 165 on lift tooth connecting portion 157 and work feed eccentric wheel 16 on wheel 15 is fixed, therefore work feed
Eccentric angle is fixed, and elliptic motion trace is also fixed relative to the position of needle plate, and the work feed bias time is also fixed；When the thickness of sewing
During degree change, such as during the thick material of sewing, in order that work feed is more smooth, it is necessary to will be adjusted after the work feed bias time, now, make sewing
Machine stops operating, and makes both relative rotations of the first connecting portion 151 and second connecting portion 161, then lifts on tooth eccentric wheel 15
Lift tooth connecting portion 157 and work feed eccentric wheel 16 on work feed connecting portion 165 between relative position change, namely realize
Adjust the eccentric angle between lift tooth bias of work feed within the specific limits so that work feed eccentric angle changes, work feed when
Between lift the tooth time between interval also change, in other words, lift tooth motion and work feed motion start time difference becomes
Change, therefore the movement locus of the feed dog 26 in Figure 21 turns to elliptic motion trace by the change of elliptic motion trace 1, and then will give
Cloth is adjusted after the bias time, the final demand for causing sewing machine to adjust the work feed bias time after disclosure satisfy that during thick material sewing, improves seam
The thick of machine of threading expects adaptability.In addition, when first connecting portion 151 and both relative rotations of second connecting portion 161, tooth connecting portion is lifted
The work feed eccentric throw between lift tooth eccentric throw, work feed connecting portion 165 and main shaft 12 between 157 and main shaft 12 does not change,
Therefore needle gage size is constant；In other words, the application is realized on the premise of needle gage size is not changed, and can be realized within the specific limits
The step-less adjustment of work feed bias time.
It is following exemplified by lifting tooth eccentric wheel 15 and be fixed on main shaft 12, to the company of lift tooth eccentric wheel 15 and work feed eccentric wheel 16
The preferred embodiment expansion narration of binding structure.
As shown in Figure 15 to Figure 17, the accepting hole of accommodating first connecting portion 151 is offered in the second connecting portion 161
156；The neck 152 of circumferentially extending of the circle along first connecting portion 151 is offered on the outer peripheral face of the first connecting portion 151,
Holding screw 17 is threaded with the second connecting portion 161, the end of the holding screw 17 is located in neck 152, simultaneously
Abutted against with first connecting portion 151.Regulation otch 153 is offered in the first connecting portion 151, adjusts otch 153 along first
The radial direction insertion first connecting portion 151 of connecting portion 151, first connecting portion 151 have the respectively at the both ends of regulation otch 153
The otch end face 155 of a kerf end face 154 and second；The second connecting portion 161 is provided with the regulation prominent to regulation otch 153
Connecting portion 163, described adjust in connecting portion 163 are threaded with adjusting screw 18, the end and first of the adjusting screw 18
Otch end face 154 abuts against.In operation process, holding screw 17 is connected in neck 152 sewing machine, by first connecting portion
151 and second connecting portion 161 lock so that both geo-stationaries.When needing to adjust work feed eccentric angle, turning adjusting screw
18, then adjusting screw 18 is along its axial feed；Because lift tooth eccentric wheel 15 is fixed on main shaft 12, therefore adjusting screw 18 is in axial direction
While feeding, pass through active force and reaction force so that work feed eccentric wheel 16 turns over an angle relative to lift tooth eccentric wheel 15
Degree, adjust and holding screw 17 tightened again after correct position, locked.The regulation otch 153 is in first connecting portion 151
On particular location set according to the actual requirements, by change adjust otch 153 position can limit work feed eccentric angle
Adjustable range.
Preferably, as shown in Figure 15 to Figure 17, the neck 152 is V-shaped groove or says it is vee gutter, the tightening
The end of screw 17 has the conus portion 171 being adapted with V-shaped groove, and both are engaged can also be in the mistake of regulation work feed eccentric angle
Cheng Zhong, it can limit and axial displacement occurs between lift tooth eccentric wheel 15 and work feed eccentric wheel 16.The first connecting portion 151 is
Accepting hole 156 is provided with two incisions end face 155, spring 19 is installed in the accepting hole 156, one end of the spring 19 and the
The phase of one connecting portion 151 is fixed, and the other end and the regulation connecting portion 163 of spring 19 abut against, so as in regulation work feed eccentric angle
During, the position of work feed eccentric wheel 16 can be avoided to occur disorderly shaking phenomenon, cloth feeding mechanism remains able to normally after ensureing regulation
And stably run.The end of the adjusting screw 18 is hemisphere face 181 so that the otch end face 154 of adjusting screw 18 and first
It is always the state of contact.The second connecting portion 161 offers operation otch 164, the regulation at regulation connecting portion 163
Screw 18 exposes at operation otch 164, is easy to rotate adjusting screw 18.
As shown in figure 18, the lift tooth that the lift tooth gear unit includes lift tooth connecting rod 221 and is fixed on feed lifting rock shaft 13 drives
Dynamic crank 222, the front end of lift tooth connecting rod 221 is installed in rotation on lift tooth eccentric wheel 15 by bearing lifts tooth connecting portion 157
Periphery, the rear end of lift tooth connecting rod 221 and lift tooth driving crank 222 are be hinged；Main shaft 12 drives lift tooth eccentric wheel 15 to rotate, and passes through
Lift tooth connecting rod 221 and lift tooth driving crank 222 drive feed lifting rock shaft 13 to swing.In addition, feed lifting rock shaft 13 drives retainer 20 to swing up and down
Structure be：The rear end of retainer 20 has the first driving chute 201, and the left end of feed lifting rock shaft 13 is hinged with the first sliding block 223, described
First sliding block 223 is engaged with the first driving chute 201 and can be along the bearing of trend of the first driving chute 201 in the first driving
Slid in chute 201.Especially, as shown in Figure 14 and Figure 18, the right-hand member of main shaft 12 is with inclined with lift tooth eccentric wheel 15 and work feed
The first shaft part 121 that heart wheel 16 is engaged, left end have the second shaft part 122 being engaged with retainer 20, and the second shaft part 122 is eccentric
In being hinged with the second sliding block 224 on the first shaft part 121, the second shaft part 122, the front end of retainer 20 has the second driving chute 202,
Second sliding block 224 is engaged with the second driving chute 202 and can be along the bearing of trend of the second driving chute 202 second
Slid in driving chute 202, therefore main shaft 12 drives retainer 20 to swing up and down, realized while rotating by the second sliding block 224
In the presence of main shaft 12 and feed lifting rock shaft 13, the rear and front end of retainer 20 can be swung up and down with identical amplitude.
As illustrated in figures 19 and 20, the work feed gear unit include the first work feed connecting rod 231, the second work feed connecting rod 232,
And the work feed driving crank 233 on cloth pushing shaft 14 is fixed on, the upper end of the first work feed connecting rod 231 is rotationally pacified by bearing
The periphery of work feed connecting portion 165 on work feed eccentric wheel 16, the lower end of the first work feed connecting rod 231 and the second work feed connecting rod 232
Front end be hinged, the rear end of the second work feed connecting rod 232 and work feed driving crank 233 are hinged.In addition, cloth pushing shaft 14 drives retainer
The structure of 20 swings is：The left end of cloth pushing shaft 14 is fixed with cloth feeding crank 234, and the work feed of cloth feeding crank 234 and 1 the 3rd connects
The rear end of bar 235 is hinged, and the front end of the 3rd work feed connecting rod 235 is connected by a screw with retainer 20.
Further, the cloth feeding mechanism also includes needle gage adjustment unit, as shown in Fig. 6, Figure 19 and Figure 20, the needle gage
Adjustment unit includes the regulation support shaft 241 parallel with feed lifting rock shaft 13, the regulation crank being fixed in regulation support shaft 241
242nd, needle gage regulation connecting rod 243, the tune for adjusting copper sheathing 244 and regulation copper sheathing 244 screw thread and coordinating being fixed in lower section casing 25
Section screw rod 245 and the limited block 246 for being fixed on the front end of adjusting screw rod 245；Regulation support shaft 241 is installed in rotation on down
Save in casing 25, the rear end of adjusting screw rod 245 is positioned at the outside of lower section casing 25；Strip grooves are offered in regulation crank 242, institute
Adjusting screw rod 245 is stated to be located in strip grooves；The lower end of front end and the first work feed connecting rod 231 of needle gage regulation connecting rod 243 and
The front end of second work feed connecting rod 232 is coaxially hinged, and the rear end of needle gage regulation connecting rod 243 and regulation crank 242 are be hinged.Therefore, when
When needle gage is adjusted, adjusting screw rod 245 is rotated, then adjusting screw rod 245 is along its axial feed, and then drives regulation crank 242 and adjust
Section support shaft 241 turns over an angle around regulation the central axial of support shaft 241, and adjusting connecting rod 243 by needle gage changes first
The position of the pin joint of 231 and second work feed connecting rod of work feed connecting rod 232, so as to change the swing that main shaft 12 drives cloth pushing shaft 14 to swing
Amplitude, the final amplitude of fluctuation for changing cloth pushing shaft 14 and driving the swing of retainer 20, realizes the regulation of needle gage size.
In above-described embodiment, the upper axle 1, main shaft 12, feed lifting rock shaft 13, cloth pushing shaft 14 and regulation support shaft 241 can all turn
It is supported on dynamicly in copper sheathing 10, copper sheathing 10 is fixedly mounted on upper section casing 11 or lower section casing 25 with the mounting means of interference fit
In.
In summary, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any ripe
Know the personage of this technology all can carry out modifications and changes under the spirit and scope without prejudice to the present invention to above-described embodiment.Cause
This, those of ordinary skill in the art is complete without departing from disclosed spirit and institute under technological thought such as
Into all equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of sewing machine, including main shaft (12), upper axle (1), needle bar crank (2), the pin extended up and down for being fixed on axle (1)
Bar (3), the shank bundle head (4) for being fixed on shank (3), feed lifting rock shaft (13), cloth pushing shaft (14), lift tooth eccentric wheel (15), work feed are inclined
Heart wheel (16), the lift tooth gear unit being connected between lift tooth eccentric wheel (15) and feed lifting rock shaft (13) and to be connected to work feed inclined
Work feed gear unit between heart wheel (16) and cloth pushing shaft (14), the main shaft (12) and upper axle (1) by motor-driven rotation, its
It is characterised by：Also include link (5), the link (5) is driven, along the bearing of trend of shank (3) by needle bar crank (2)
Lower reciprocating motion, the shank bundle head (4) is connected with link (5), both geo-stationaries；It is described lift tooth eccentric wheel (15) or
Work feed eccentric wheel (16) is fixed on main shaft (12), and the lift tooth eccentric wheel (15) is provided with first connecting portion (151), the work feed
Eccentric wheel (16) is provided with second connecting portion (161), and the first connecting portion (151) and second connecting portion (161) are mutually socketed；
When cloth feeding mechanism is in work feed state, the first connecting portion (151) and second connecting portion (161) geo-stationary；Work as regulation
During work feed eccentric angle, the first connecting portion (151) and second connecting portion (161) relatively rotate.
2. sewing machine according to claim 1, it is characterised in that：Also include the driving sliding block for being articulated with needle bar crank (2)
(6) and the guide holder (7) fixed of position, have in the link (5) along perpendicular to the of the front and rear extension in the direction of upper axle (1)
One chute (51) and the rail portion (52) extended up and down, there is the second chute extended up and down in the guide holder (7)
(71), the driving sliding block (6) is engaged with the first chute (51) and can be along the bearing of trend of the first chute (51) first
Slided in chute (51), the rail portion (52) is engaged with the second chute (71) and can be along the extension of the second chute (71)
Direction is slided in the second chute (71), and the shank pricks head (4) and is connected to rail portion (52).
3. sewing machine according to claim 2, it is characterised in that：Also include the connecting pin (8) parallel with upper axle (1),
The needle bar crank (2) is provided with prominent sliding block connecting portion (21), and one end of the connecting pin (8) is fixed on sliding block connecting portion
(21) in, the driving sliding block (6) is rotatably installed on the other end of connecting pin (8).
4. sewing machine according to claim 2, it is characterised in that：The link (5) is T-shaped, including front and rear extension
Horizontal part (53) and the vertical portion (54) extended up and down, first chute (51) are opened in horizontal part (53), described vertical
Portion (54) forms the rail portion (52).
5. sewing machine according to claim 1, it is characterised in that：Accommodating is offered in the second connecting portion (161)
The host cavity (162) of one connecting portion (151)；Offered on the outer peripheral face of the first connecting portion (151) along first connecting portion
(151) neck (152) of circumferentially extending, holding screw (17) is threaded with the second connecting portion (161), it is described tight
The end for determining screw (17) is located in neck (152) and abutted against with first connecting portion (151).
6. sewing machine according to claim 5, it is characterised in that：The neck (152) is V-shaped groove, the holding screw
(17) end has the conus portion (171) being adapted with V-shaped groove.
7. sewing machine according to claim 1, it is characterised in that：Regulation is offered on the first connecting portion (151) to cut
Mouthful (153), and first connecting portion (151) has the first otch end face (154) and the respectively at the both ends of regulation otch (153)
Two incisions end face (155)；The second connecting portion (161) is provided with the regulation connecting portion prominent to regulation otch (153)
(163), it is threaded with adjusting screw (18) in regulation connecting portion (163), the end of the adjusting screw (18) and the
A kerf end face (154) abuts against.
8. sewing machine according to claim 7, it is characterised in that：The first connecting portion (151) is in the second otch end face
(155) place is provided with accepting hole (156), is provided with spring (19) in the accepting hole (156), one end of the spring (19) and the
One connecting portion (151) is mutually fixed, and the other end and the regulation connecting portion (163) of spring (19) abut against.
9. sewing machine according to claim 7, it is characterised in that：The end of the adjusting screw (18) has cuts with first
The hemisphere face (181) that mouth end face (154) abuts against.
10. sewing machine according to claim 7, it is characterised in that：The second connecting portion (161) is in regulation connecting portion
(163) place offers operation otch (164), and the adjusting screw (18) is exposed from operation otch (164).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710851772.XA CN107447377B (en) | 2017-09-19 | 2017-09-19 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710851772.XA CN107447377B (en) | 2017-09-19 | 2017-09-19 | Sewing machine |
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| Publication Number | Publication Date |
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| CN107447377A true CN107447377A (en) | 2017-12-08 |
| CN107447377B CN107447377B (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710851772.XA Active CN107447377B (en) | 2017-09-19 | 2017-09-19 | Sewing machine |
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| CN (1) | CN107447377B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103681A (en) * | 2018-03-05 | 2018-06-01 | 苏州强逸机械有限公司 | A kind of needle bar crank |
| CN108374242A (en) * | 2018-04-21 | 2018-08-07 | 浙江美机缝纫机有限公司 | Thorn material feed mechanism based on dual drive |
| CN109371575A (en) * | 2018-07-11 | 2019-02-22 | 杰克缝纫机股份有限公司 | The feed device and sewing machine of sewing machine |
| CN109402877A (en) * | 2018-11-23 | 2019-03-01 | 浙江乐江机械有限公司 | A kind of work feed adjustment mechanism of sewing machine |
| CN110983662A (en) * | 2019-12-23 | 2020-04-10 | 拓卡奔马机电科技有限公司 | Cloth-needling mechanism and sewing equipment with same |
| CN111663254A (en) * | 2019-03-05 | 2020-09-15 | 杰克缝纫机股份有限公司 | Sewing machine and needle pitch adjusting structure thereof |
| WO2022206002A1 (en) * | 2021-04-02 | 2022-10-06 | 杰克科技股份有限公司 | Fabric feeding module of sewing machine |
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| CN2692180Y (en) * | 2004-04-20 | 2005-04-13 | 赵舜培 | Sewing mechaism of sewing machine |
| CN103374794A (en) * | 2012-04-20 | 2013-10-30 | Juki株式会社 | Cloth feeding mechanism of sewing machine |
| US9027488B2 (en) * | 2013-10-02 | 2015-05-12 | Shing Ray Sewing Machine Co., Ltd | Direct drive cloth feeding mechanism of sewing machine |
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| CN1202544A (en) * | 1997-06-16 | 1998-12-23 | 重机公司 | Cloth feeding method and apparatus for sewing machine |
| CN1368572A (en) * | 2001-01-29 | 2002-09-11 | 重机株式会社 | Needle-bar travel regulating device |
| CN2692180Y (en) * | 2004-04-20 | 2005-04-13 | 赵舜培 | Sewing mechaism of sewing machine |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103681A (en) * | 2018-03-05 | 2018-06-01 | 苏州强逸机械有限公司 | A kind of needle bar crank |
| CN108374242A (en) * | 2018-04-21 | 2018-08-07 | 浙江美机缝纫机有限公司 | Thorn material feed mechanism based on dual drive |
| CN109371575A (en) * | 2018-07-11 | 2019-02-22 | 杰克缝纫机股份有限公司 | The feed device and sewing machine of sewing machine |
| CN109402877A (en) * | 2018-11-23 | 2019-03-01 | 浙江乐江机械有限公司 | A kind of work feed adjustment mechanism of sewing machine |
| CN109402877B (en) * | 2018-11-23 | 2024-02-09 | 浙江乐江机械有限公司 | Cloth feeding adjusting mechanism of sewing machine |
| CN111663254A (en) * | 2019-03-05 | 2020-09-15 | 杰克缝纫机股份有限公司 | Sewing machine and needle pitch adjusting structure thereof |
| CN110983662A (en) * | 2019-12-23 | 2020-04-10 | 拓卡奔马机电科技有限公司 | Cloth-needling mechanism and sewing equipment with same |
| CN110983662B (en) * | 2019-12-23 | 2021-10-29 | 拓卡奔马机电科技有限公司 | Cloth-needling mechanism and sewing equipment with same |
| WO2022206002A1 (en) * | 2021-04-02 | 2022-10-06 | 杰克科技股份有限公司 | Fabric feeding module of sewing machine |
| CN115182112A (en) * | 2021-04-02 | 2022-10-14 | 杰克科技股份有限公司 | Modular sewing machine |
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|---|---|
| CN107447377B (en) | 2020-07-07 |
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Address after: 318010 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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