CN107435192A - A kind of needle bar drive device and sewing machine - Google Patents
A kind of needle bar drive device and sewing machine Download PDFInfo
- Publication number
- CN107435192A CN107435192A CN201710851435.0A CN201710851435A CN107435192A CN 107435192 A CN107435192 A CN 107435192A CN 201710851435 A CN201710851435 A CN 201710851435A CN 107435192 A CN107435192 A CN 107435192A
- Authority
- CN
- China
- Prior art keywords
- shank
- needle bar
- chute
- link
- drive device
- 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.)
- Pending
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Classifications
-
- 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 needle bar drive device and sewing machine, needle bar drive device is included by the upper axle of motor-driven rotation, the needle bar crank for being fixed on upper axle, the shank extended up and down, the shank bundle head and link for being fixed on shank, the link is driven by needle bar crank, pumped along the bearing of trend of shank, and the shank bundle head is connected with link, both geo-stationaries.In the application, after decomposition, the active force of its in the vertical direction is directly passed to shank by link and pricks head and shank the directed force F 1 that needle bar crank provides, and so as to provide larger shank puncture force, lifts the thick material adaptability of sewing machine.
Description
Technical field
The present invention relates to a kind of needle bar drive device.
The invention further relates to a kind of sewing machine for including above-mentioned needle bar drive device.
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.
Further, 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, further increase vibration and the noise of sewing machine complete machine.
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 needle bar drive device, not
On the premise of the torque for changing original motor, using the teaching of the invention it is possible to provide larger shank puncture force.
To achieve the above object, the present invention provides a kind of needle bar drive device, including the upper axle, solid by motor-driven rotation
Needle bar crank due to upper axle, the shank extended up and down, the shank that is fixed on shank prick head and link, the link
Driven by needle bar crank, pumped along the bearing of trend of shank, the shank bundle head is connected with link, Liang Zhexiang
To static.
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.
Preferably, in addition to the connecting pin parallel with upper axle, the needle bar crank are provided with prominent sliding block connecting portion,
One end of the connecting pin is fixed in sliding block connecting portion, and the driving sliding block is rotatably installed on the other end of connecting pin.
Further, the link is T-shaped, including the horizontal part of front and rear extension and the vertical portion that extends up and down, described
First chute is opened in horizontal part, and the vertical portion forms the rail portion.
Preferably, multiple through holes interconnected are offered on the link, lubricating oil line is filled with the through hole
Or lubricant grease；In multiple through holes, a part of through hole is connected with the first chute, and another part through hole is connected with the second chute
It is logical.
Further, the guide holder the second chute towards shank prick head end face on fixed limited location pressing plate, it is described
Rail portion abuts against with spacing pressing plate.
Preferably, the material of the driving sliding block is copper, and the material of the link is aluminium.
Further, the shank pricks head to one end of link provided with the connection axle portion parallel to upper axle, the company
Connect and connecting hole is offered in frame, the connection axle portion coordinates with being connected interporal lacuna.
The present invention also provides a kind of sewing machine, and needle bar drive device as described above is provided with the sewing machine.
As described above, needle bar drive device of the present invention and sewing machine, have the advantages that：
In the application, for the directed force F 1 that needle bar crank provides after decomposition, the active force of its in the vertical direction passes through company
Connect frame and be directly passed to shank bundle head and shank, so as to provide larger shank puncture force, the thick material for lifting sewing machine adapts to
Property.
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 sewing machine in the application.
Fig. 5 is the structural representation of needle bar drive device in the application.
Fig. 6 is the connection diagram of needle bar crank and driving sliding block in the application.
Fig. 7 is the structural representation of link in the application.
Fig. 8 is the structural representation that shank pricks head in the application.
Fig. 9 is the load transfer analysis figure of needle bar drive device in the application.
Component label instructions
Axle on 1
2 needle bar cranks
21 sliding block connecting portions
3 shanks
4 shanks prick head
41 mounting holes
42 connection axle portions
5 links
51 first chutes
52 rail portions
53 horizontal parts
54 vertical portions
55 through holes
551 first through hole
552 second through holes
56 connecting holes
6 driving sliding blocks
7 guide holders
71 second chutes
8 connecting pins
81 flanges
9 spacing pressing plates
10 copper sheathings
Casing is saved on 11
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.
As shown in figure 4, the present invention provides a kind of needle bar drive device, in the upper section casing 11 of sewing machine.Such as Fig. 5
It is shown, needle bar drive device include by motor-driven rotation upper axle 1, be fixed on the needle bar crank 2 of upper axle 1, extend up and down
Shank 3, the shank for being fixed on shank 3 prick first 4 and link 5, and the link 5 drives by needle bar crank 2, along shank 3
Bearing of trend pumps, and the shank bundle first 4 is connected with link 5, both geo-stationaries., will for ease of narration
The axial direction of upper axle 1 is defined as left and right directions, and upper axle 1 is left direction towards the direction of head of sewing machine, and upper axle 1 is towards sewing machine
The direction of tail is right direction.The needle bar crank 2 is enclosed on the left end of axle 1, and the screw by being radially extended along upper axle 1 is consolidated
Due to upper axle 1.More preferably, the preferred structure that the drive connection frame 5 of needle bar crank 2 pumps is：Such as Fig. 5 to Fig. 7
Shown, needle bar drive device also includes being articulated with the driving sliding block 6 of the left side of needle bar crank 2, position is fixed and being located at the right side of shank 3
The guide holder 7 of side, the guide holder 7 are fixed on upper section casing 11 by multiple screws；On the right side of the upper end of link 5
Offer along the first chute 51 extended before and after the direction of upper axle 1, the lower end of link 5 has the guide rail extended up and down
Portion 52；The guide holder 7 is towards offering the second chute 71 for extending up and down on the left side of link 5；The driving sliding block 6
It is engaged and can be slided along the bearing of trend of the first chute 51 in the first chute 51 with the first chute 51；The rail portion
52 are engaged with the second chute 71 and can be slided along the bearing of trend of the second chute 71 in the second chute 71；The guide 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 Fig. 9, 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 5, 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 fig. 6, 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 7 and Figure 8, the shank pricks first 4 towards even
The right-hand member for connecing frame 5 is provided with connection axle portion 42 axially extending to the right, and left and right insertion is offered in the rail portion 52 of the link 5
Connecting hole 56, it is described connection axle portion 42 be located in connecting hole 56 and with the gap of connecting hole 56 coordinate；Therefore, when link 5
When pumping, 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 5 and Figure 8, the shank is pricked in first 4 and offered
The mounting hole 41 of up/down perforation, the shank 3 are located in mounting hole 41, and shank pricks first 4 and reuses screw lock in shank 3
On.
Further, as shown in fig. 7, 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 5, 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.
The present invention also provides a kind of sewing machine, and shank as described above is provided with the upper section casing 11 of the sewing machine and is driven
Motivation structure.
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 (9)
1. a kind of needle bar drive device, including by motor-driven rotation upper axle (1), be fixed on the needle bar crank of upper axle (1)
(2) shank (3) that, extends up and down and it is fixed on the shank of shank (3) and pricks head (4), it is characterised in that：Also include link
(5), the link (5) is pumped by needle bar crank (2) driving, along the bearing of trend of shank (3), and the shank is pricked
Head (4) is connected with link (5), both geo-stationaries.
2. needle bar drive device according to claim 1, it is characterised in that：Also include the drive for being articulated with needle bar crank (2)
The guide holder (7) that movable slider (6) and position are fixed, have in the link (5) along prolonging before and after the direction of upper axle (1)
The first chute (51) stretched and the rail portion (52) extended up and down, have in the guide holder (7) extend up and down second to slide
Groove (71), the driving sliding block (6) are engaged with the first chute (51) and can be along the bearing of trends of the first chute (51) the
Slided in one chute (51), the rail portion (52) is engaged with the second chute (71) and being capable of prolonging along the second chute (71)
Stretch direction to slide in the second chute (71), the shank pricks head (4) and is connected to rail portion (52).
3. needle bar drive device according to claim 2, it is characterised in that：Also include the connection parallel with upper axle (1)
Sell (8), 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
In connecting portion (21), the driving sliding block (6) is rotatably installed on the other end of connecting pin (8).
4. needle bar drive device according to claim 2, it is characterised in that：The link (5) is T-shaped including front and rear
The horizontal part (53) of extension and the vertical portion (54) extended up and down, first chute (51) are opened in horizontal part (53), institute
State vertical portion (54) and form the rail portion (52).
5. needle bar drive device according to claim 2, it is characterised in that：Offered on the link (5) multiple mutual
The through hole (55) being connected, lubricating oil line or lubricant grease are filled with the through hole (55)；In multiple through holes (55),
A part of through hole (55) is connected with the first chute (51), and another part through hole (55) is connected with the second chute (71).
6. needle bar drive device according to claim 2, it is characterised in that：The guide holder (7) is in the second chute (71)
Fixed limited location pressing plate (9) on the end face of head (4) is pricked towards shank, the rail portion (52) abuts against with spacing pressing plate (9).
7. needle bar drive device according to claim 2, it is characterised in that：The material of the driving sliding block (6) is copper, institute
The material for stating link (5) is aluminium.
8. needle bar drive device according to claim 1, it is characterised in that：The shank pricks head (4) towards link (5)
One end be provided with connection axle portion (42) parallel to upper axle (1), offer connecting hole (56), the company in the link (5)
Spindle portion (42) coordinates with connecting hole (56) gap.
A kind of 9. sewing machine, it is characterised in that：Shank driving described in claim any one of 1-8 is installed in the sewing machine
Mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710851435.0A CN107435192A (en) | 2017-09-19 | 2017-09-19 | A kind of needle bar drive device and sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710851435.0A CN107435192A (en) | 2017-09-19 | 2017-09-19 | A kind of needle bar drive device and sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107435192A true CN107435192A (en) | 2017-12-05 |
Family
ID=60462402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710851435.0A Pending CN107435192A (en) | 2017-09-19 | 2017-09-19 | A kind of needle bar drive device and sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107435192A (en) |
Cited By (3)
| 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 |
| CN110438677A (en) * | 2019-09-10 | 2019-11-12 | 上海博岙机电制造有限公司 | The shank linkage carriage of crosspointer longitudinal direction colour changing computer embroidery machine |
| CN110565283A (en) * | 2019-09-16 | 2019-12-13 | 杰克缝纫机股份有限公司 | Sewing machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP5059477B2 (en) * | 2007-04-25 | 2012-10-24 | 株式会社鈴木製作所 | Sewing machine lid needle drive mechanism |
-
2017
- 2017-09-19 CN CN201710851435.0A patent/CN107435192A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP5059477B2 (en) * | 2007-04-25 | 2012-10-24 | 株式会社鈴木製作所 | Sewing machine lid needle drive mechanism |
Cited By (3)
| 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 |
| CN110438677A (en) * | 2019-09-10 | 2019-11-12 | 上海博岙机电制造有限公司 | The shank linkage carriage of crosspointer longitudinal direction colour changing computer embroidery machine |
| CN110565283A (en) * | 2019-09-16 | 2019-12-13 | 杰克缝纫机股份有限公司 | Sewing machine |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171205 |
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| RJ01 | Rejection of invention patent application after publication |