CN101736530B - Shifting gear transmission device of cylindrical sewing machine - Google Patents
Shifting gear transmission device of cylindrical sewing machine Download PDFInfo
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- CN101736530B CN101736530B CN 200810172741 CN200810172741A CN101736530B CN 101736530 B CN101736530 B CN 101736530B CN 200810172741 CN200810172741 CN 200810172741 CN 200810172741 A CN200810172741 A CN 200810172741A CN 101736530 B CN101736530 B CN 101736530B
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- tooth
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Abstract
The invention relates to a shifting gear transmission device of a cylindrical sewing machine. The sewing machine is provided with a pin plate with a pinhole and a through groove; the shifting gear transmission device comprises a front shifting gear, a rear shifting gear, a front shifting gear adjustment set and a rear shifting gear adjustment set, wherein the rear shifting gear and the front shifting gear generate elliptic motion tracks with different sizes according to the adjustment of the front shifting gear adjustment set and the rear shifting gear adjustment set; the starting points of the motion tracks of the rear shifting gear are at the same position and formed at one end of the through groove adjacent to the pinhole; the midpoints of the motion tracks of the front shifting gear are at the same position and formed at one end of the through groove adjacent to the pinhole; and with the shifting gear transmission device, the sewed cloth can achieve accurate and stable transmission.
Description
Technical field
The present invention is relevant for a kind of shifting gear transmission device, espespecially a kind of shifting gear transmission device of cylindrical sewing machine.
Background technology
The shifting gear transmission device of the cylindrical sewing machine of prior art is such as TaiWan, China patent announcement number
I271457 discloses, mainly comprise a final drive shaft, two axis of rockings, a swing unit and two adjustment units, this final drive shaft is installed in Sewing machines inside, the heart-shaped formula of the parallel but non co axial of two axis of rockings is articulated on the final drive shaft, and be subjected to final drive shaft to drive formation one and swing up and down stroke, one of this two axis of rocking is front axis of rocking for sending tooth before the correspondence, and another send tooth after for correspondence is rear axis of rocking; Swing unit is articulated in this front or rear axis of rocking, includes forward and backward front swing arm and the rear-swing arm that send the tooth feed distance of two corresponding controls; Adjustment unit includes two balancing weights and two that are articulated in forward and backward swing arm and is fixedly arranged on pulling piece on the balancing weight, respectively in order to send before adjusting tooth or after send the translation reciprocating feed stroke of tooth.
Yet, the shifting gear transmission device of the cylindrical sewing machine of prior art, although have the function that transmits being sewn clothing, but under using, reality still has following problem points, before it, after send tooth to be disposed in the groove of needle plate to put middle mode, when the demand of sewing be little shift motion seam apart from the time, before it, after send the distance of tooth and car pin and pin hole to be widened, before not only making, after send tooth to be difficult for stable picking up transmission to being sewn clothing, and easily cause to be sewn clothing and to produce many harmful effects such as shrinkage or the out-of-flatness of arching upward, especially for retractility good to be sewn clothing remarkable especially especially; In addition it forward and backwardly send the tooth adjustment to organize employed dial to arrange for separating, and can not effectively obtain to reduce forming assembly material cost and assembly cost; Really remain to be improved.
Summary of the invention
A purpose of the present invention is to provide a kind of shifting gear transmission device of cylindrical sewing machine, and it can make and be sewn clothing and obtain accurate and stable transmission.
In order to realize above-mentioned purpose, the invention provides a kind of shifting gear transmission device of cylindrical sewing machine, this Sewing machines has a body and is fixed in a needle plate of this body, be provided with a pin hole and groove and rear groove before the forward and backward side of this pin hole offers respectively in this needle plate, this shifting gear transmission device comprises sending behind a final drive shaft, the eccentric wheel, to send behind the tooth driving mechanism, and send tooth before sending tooth driving mechanism, before the tooth, that this final drive shaft is articulated in this body; This eccentric wheel is socketed on this final drive shaft; Should after send the tooth driving mechanism to comprise to be socketed on this send tooth drive link group after eccentric one section one, be arranged in send tooth drive link group after this and be articulated in this body one after send the tooth power transmission shaft, be connected to send tooth drive link group after this and be hubbed at this body one after send tooth adjustment group, connect send the tooth power transmission shaft after this and be subjected to itself and this final drive shaft institute common driving one after send the tooth holder; Send the tooth holder and be positioned at this rear groove after sending tooth to be fixed in this after being somebody's turn to do; Should before send the tooth driving mechanism to comprise to be socketed on this eccentric another section one before send tooth drive link group, be arranged in send tooth drive link group before this and be articulated in this body one before send the tooth power transmission shaft, be connected to send tooth drive link group before this and be hubbed at this body one before send tooth adjustment group, connect send the tooth power transmission shaft before this and be subjected to itself and this final drive shaft institute common driving one before send the tooth holder; Send the tooth holder and be positioned at this front groove before sending tooth to be fixed in this before being somebody's turn to do; Sending tooth after wherein being somebody's turn to do and sending tooth before this is to produce different big or small elliptic motion traces according to sending the adjustment of tooth adjustment group afterwards, front, should after send tooth the starting point of each elliptic motion trace all in same position and be formed at an end of contiguous this pin hole of groove after this, send two/one stroke point of each elliptic motion trace of tooth all in same position and be formed at an end of contiguous this pin hole of this front groove before this.
The present invention contrasts prior art and has following effect, by after send all contiguous pin hole place of starting point of each movement locus of tooth, being sewn past the car pin rear transmission that clothing all can be accurate and stable and going out for various different expansion performances.Send all contiguous pin hole place of two/one stroke point of each elliptic motion trace of tooth before the utilization, enter for past the car pin direction transmission that clothing all can be accurate and stable that is sewn of various different expansion performances.Share for the forward and backward tooth adjustment group of sending respectively by dial, not only can obtain to save at the composition assembly, aspect assembling, also can significantly reduce assembly cost in addition.
Description of drawings
Fig. 1 is that transmission device of the present invention is applied to Sewing machines combination schematic diagram;
Fig. 2 is transmission combination schematic diagram of the present invention;
Fig. 3 is transmission device three-dimensional exploded view of the present invention;
Fig. 4 send the local combination of tooth driving mechanism schematic diagram after of the present invention;
Fig. 5 is forward and backward tooth group and the dial three-dimensional exploded view of sending of the present invention;
Fig. 6 send the local combination of tooth driving mechanism schematic diagram before of the present invention;
Fig. 7 is the tooth height adjusting three-dimensional exploded view that send of the present invention;
Fig. 8 send tooth driving mechanism side view after of the present invention;
Fig. 9 send tooth driving mechanism side view before of the present invention;
Figure 10 is that transmission device of the present invention uses state diagram.
Wherein, Reference numeral
1 shifting gear transmission device
10 final drive shafts
20 eccentric wheels
21,22 eccentric segments
Send the tooth driving mechanism after 30
Send the tooth drive rod after sending tooth drive link group 311 after 31
Send the tooth linking arm after sending tooth connecting rod 313 after 312
Send the tooth power transmission shaft after sending tooth swinging block 32 after 314
Send tooth beat piece after sending tooth adjustment group 331 after 33
332, send tooth to wear axle 334 elastomers after 333
Send tooth holder 341,342 breach after 34
35 lower links, 36 slide blocks
Send tooth after 40
Send the tooth driving mechanism before 50
Send the tooth drive rod before sending tooth drive link group 511 before 51
Send the tooth linking arm before sending tooth connecting rod 513 before 512
Send the tooth power transmission shaft before sending tooth swinging block 52 before 514
Send tooth beat piece before sending tooth adjustment group 531 before 53
532, send tooth to wear axle 534 elastomers before 533
Send tooth holder 541,542 breach before 54
Connecting rod on 55
Send tooth before 60
70 send the tooth height adjusting
71 cams, 72 connecting rods
73 beat pieces 74 send the tooth power transmission shaft
75 slide blocks
80 indicating mechanisms
81 dials, 82 pointers
83 indicator boards, 84 limited blocks
9 Sewing machiness
91 bodies, 92 needle plates
921 pin holes, 922 front grooves
923 rear grooves
The specific embodiment
Relevant detailed description of the present invention and technology contents cooperate description of drawings as follows, yet appended accompanying drawing only provides reference and explanation usefulness, and the present invention is limited.
See also Figure 1 and Figure 2, the invention provides a kind of shifting gear transmission device of cylindrical sewing machine, this Sewing machines 9 has a body 91 and is fixed in a needle plate 92 of the platform in body 91 the place aheads, be provided with at least one pin hole 921 and offer respectively a plurality of front rectangular through slot 922 and a plurality of rear rectangular through slot 923 in these pin hole 921 forward and backward sides in needle plate 92, this shifting gear transmission device 1 mainly comprises sending behind a final drive shaft 10, the eccentric wheel 20, to send behind the tooth driving mechanism 30, and send tooth 60 before sending tooth driving mechanism 50 and one before the tooth 40.
See also Fig. 3, Fig. 4 and Fig. 5, final drive shaft 10 is articulated in body 91 inside by axle sleeve; 20 of eccentric wheels are fixed by socket on final drive shaft 10, and form respectively the eccentric segment 21,22 of different directions in two sides, and this two eccentric segment 21,22 offset and eccentric orientation are a fixed value.
After send after sending tooth driving mechanism 30 to comprise one to send after the tooth drive link group 31, and send tooth holder 34 after sending tooth adjustment group 33 and one behind the tooth power transmission shaft 32,, an eccentric segment 21 that wherein send afterwards tooth drive link group 31 to comprise to be socketed on eccentric wheel 20 one after send tooth drive rod 311, send after jointly being articulated in by axostylus axostyle tooth drive rod 311 the bottom one after send send behind tooth connecting rod 312 and one tooth linking arm 313, and be articulated in by another axostylus axostyle after send tooth connecting rod 312 one after send tooth swinging block 314; After send tooth power transmission shaft 32 to be hubbed at body 91 by axle sleeve, and send after being connected to tooth drive link group 31 after send tooth swinging block 314 (such as Fig. 4), send tooth holder 34 after after this sending tooth power transmission shaft 32 to be connected in by a lower link 35; Then send tooth adjustment group 33 to comprise to send after one send after tooth beat piece 331 and the cross-under tooth beat piece 331 two after send tooth to wear axle 332,333, this send after two tooth wear axle 332,333 wear respectively be articulated in body 91 and after send tooth linking arm 313, and after this send tooth beat piece 331 to position by the connection of elastomer 334.After send tooth holder 34 forward and backward both sides to be formed with respectively a breach 341,342, wherein breach 342 is accommodating for a slide block 36 of final drive shaft 10 latter end cross-under, and send tooth holder 34 to make forward and backward position reciprocally swinging after sending tooth power transmission shaft 32 common drivings after final drive shaft 10 is reached.
After send tooth 40 be screwed in after send tooth holder 34, and after this send the top of tooth 40 to be positioned at the rear groove 923 (as shown in Figure 1) at aforementioned pin hole 921 rears.
See also Fig. 3 and Fig. 6, before send before sending tooth driving mechanism 50 to comprise one to send before the tooth drive link group 51, and send tooth holder 54 before sending tooth adjustment group 53 and one before the tooth power transmission shaft 52,, another eccentric segment 22 that wherein before send tooth drive link group 51 to comprise to be socketed on eccentric wheel 20 one before send tooth drive rod 511, send before jointly being articulated in by axostylus axostyle tooth drive rod 511 the bottom one before send send before tooth connecting rod 512 and one tooth linking arm 513, and be articulated in by another axostylus axostyle before send tooth connecting rod 512 one before send tooth swinging block 514; Before send tooth power transmission shaft 52 to be hubbed at body 91 by axle sleeve, and send before being connected to tooth drive link group 51 before send tooth swinging block 514 (such as Fig. 6); Send tooth holder 54 before sending before this tooth power transmission shaft 52 to be connected in by a connecting rod 55; And front send tooth adjustment group 53 to comprise to send before one send before tooth beat piece 531 and the cross-under tooth beat piece 531 two before send tooth to wear axle 532,533, this send before two tooth wear axle 532,533 wear respectively be articulated in body 91 and before send tooth linking arm 513 two before send tooth to wear axle 532,533, and send before this tooth beat piece 531 to position by the connection of elastomer 534.Before send tooth holder 54 forward and backward both sides to be formed with respectively a breach 541,542, wherein breach 542 is accommodating for the slide block 36 of final drive shaft 10 cross-under, and send tooth holder 54 to make forward and backward position reciprocally swinging before sending tooth power transmission shaft 52 common drivings before final drive shaft 10 is reached.
Before send tooth 60 to be screwed to send tooth holder 54 in front, and send before this top of tooth 60 to be positioned at the front groove 922 (as shown in Figure 1) in aforementioned pin hole 921 the place aheads.
See also Fig. 3 and Fig. 7, present embodiment more comprises and send tooth height adjusting 70, this send tooth height adjusting 70 to comprise to be socketed on a cam 71 of aforementioned final drive shaft 10, be socketed on a connecting rod 72 of cam 71, be articulated in a beat piece 73 of the bottom of connecting rod 72, and be arranged in beat piece 73 and be articulated in one of body 91 and send tooth power transmission shaft 74, this is placed in aforesaid breach 341 after sending terminal cross-under one slide block 75 of tooth power transmission shaft 74 more jointly, in 541, and before making final drive shaft 10 and giving tooth power transmission shaft 74 common drivings, after send tooth holder 54,34 do, upper/lower positions moves back and forth.
In addition, see also Fig. 3 and Fig. 5, shifting gear transmission device 1 of the present invention more comprises an indicating mechanism 80, this indicating mechanism 80 comprises a dial 81, one pointer 82, one indicator board 83 and two limited blocks 84, wherein offer two deep-slotted chip breakers on the dial 81, and it is fixed in the outside of body 91 by screw, after being fixed in by screw, pointer 82 send the front end face of wearing axle 332 of tooth adjustment group 33, and part protrudes out and enters in the deep-slotted chip breaker, before being fixed in by screw, indicator board 83 send the front end face of wearing axle 532 of tooth adjustment group 53, and penetrating deep-slotted chip breaker by a knob fixes, limited block 84 is fixed in the aforementioned deep-slotted chip breaker by the screw cross-under respectively, and in order to pointer 82 and indicator board 83 are done the position restriction.
Consult Fig. 8 and Fig. 9, combination and installation by above-mentioned each assembly, when need to after when sending the shift motion of tooth 40 to adjust, see also Fig. 5 and Fig. 8, at first unclamp the limited block 84 that solid locking is positioned at pointer 82 belows, mobile limited block 84 is done the position adjustment along the deep-slotted chip breaker of dial 81, to drive simultaneously and send tooth beat piece 331 to do orientation deflection after pointer 82 reaches, and send tooth linking arm 313 after making, after send tooth connecting rod 312, after send tooth swinging block 314 and after send tooth drive rod 311 to do the variation of respective angles, again with limited block 84 solid locking bits, send the shift motion of tooth 40 after can changing at last.In the time need to adjusting the shift motion that front send tooth 60, see also Fig. 5 and Fig. 9, at first unclamp the limited block 84 that solid locking is positioned at indicator board 83 belows, the mobile knob that is bolted on the indicator board 83 is done the position adjustment along the deep-slotted chip breaker of dial 81, send tooth beat piece 531 to do orientation deflection before will driving simultaneously, and send before making tooth linking arm 513, front send tooth connecting rod 512, front send tooth swinging block 514 and before send tooth drive rod 511 to do the variation of respective angles, again with limited block 84 solid locking bits, send the shift motion of tooth 60 before can changing at last.
Consult Figure 10, send after during use tooth 40 be according to after send the adjustment of tooth adjustment group 33 and produce the elliptic motion traces of different sizes, after this send the starting point S (StartPoint) of each elliptic motion trace of tooth 40 and terminating point E (End Point) all in same position and be formed at the end of rear groove 923 contiguous pin holes 921 at the rear of needle plate 92, the two/one stroke point M (Middle Point) that after this send each elliptic motion trace of tooth 40 then along with after send the shift motion that tooth adjustment group 33 adjusts and produce change.Before to send tooth 60 be according to before sending the adjustment of tooth adjustment group 53 and producing the elliptic motion traces of different sizes, two/one stroke point the M (Middle Point) that send before this each elliptic motion trace of tooth 60 is all in same position and be formed at an end of the front groove 922 contiguous pin holes 921 of needle plate 92, this trip point M is in fact at oval-shaped horizontal axis and the crossing location point of elliptic motion trace line, and be the position of finishing single elliptic motion trace stroke 1/2nd, the front starting point S (Start Point) of each elliptic motion trace of tooth 60 and the terminating point E (End Point) of sending then produces change along with the shift motion that front send tooth adjustment group 53 to adjust.
Certainly; the present invention also can have other various embodiments; in the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (9)
1. the shifting gear transmission device of a cylindrical sewing machine, this Sewing machines has a body and is fixed in a needle plate of this body, be provided with a pin hole in this needle plate and reach groove and rear groove before the forward and backward side of this pin hole offers respectively, it is characterized in that this shifting gear transmission device comprises:
One final drive shaft is articulated in this body;
One eccentric wheel is socketed on this final drive shaft;
Send the tooth driving mechanism after one, comprise be socketed on this send tooth drive link group after eccentric one section one, be arranged in send tooth drive link group after this and be articulated in this body one after send the tooth power transmission shaft, be connected to send tooth drive link group after this and be hubbed at this body one after send tooth adjustment group, connect send the tooth power transmission shaft after this and be subjected to itself and this final drive shaft institute common driving one after send the tooth holder;
Send tooth after one, be fixed in send the tooth holder after this and be positioned at this after groove;
Send the tooth driving mechanism before one, comprise be socketed on this eccentric another section one before send tooth drive link group, be arranged in send tooth drive link group before this and be articulated in this body one before send the tooth power transmission shaft, be connected to send tooth drive link group before this and be hubbed at this body one before send tooth adjustment group, connect send the tooth power transmission shaft before this and be subjected to itself and this final drive shaft institute common driving one before send the tooth holder; And
Send tooth before one, send the tooth holder and be positioned at this front groove before being fixed in this;
Sending tooth after wherein being somebody's turn to do and sending tooth before this is to produce different big or small elliptic motion traces according to sending the adjustment of tooth adjustment group afterwards, front, should after send tooth the starting point of each elliptic motion trace all in same position and be formed at an end of contiguous this pin hole of groove after this, send two/one stroke point of each elliptic motion trace of tooth all in same position and be formed at an end of contiguous this pin hole of this front groove before this.
2. the shifting gear transmission device of cylindrical sewing machine according to claim 1 is characterized in that, send the terminal point of each elliptic motion trace of tooth all in same position and be formed at an end of contiguous this pin hole of groove after this after this.
3. the shifting gear transmission device of cylindrical sewing machine according to claim 1 is characterized in that, these eccentric two sides form respectively an eccentric segment, and the offset of this eccentric segment and eccentric orientation are a fixed value.
4. the shifting gear transmission device of cylindrical sewing machine according to claim 1, it is characterized in that, should after send tooth drive link group to comprise to be socketed on this send after eccentric one the tooth drive rod, by axostylus axostyle jointly be articulated in send after this tooth drive rod one after send send behind tooth connecting rod and one the tooth linking arm, and by another axostylus axostyle be articulated in send after this tooth connecting rod one after send the tooth swinging block, send after this tooth swinging block for should after send the cross-under of tooth power transmission shaft.
5. the shifting gear transmission device of cylindrical sewing machine according to claim 4, it is characterized in that, should after send after sending tooth adjustment group to comprise to send tooth beat piece after one and connect this tooth beat piece two after send tooth to wear axle, this send after two tooth wear axle wear respectively be articulated in this body and should after send the tooth linking arm, send tooth beat piece to locate by an elastomeric connection after this.
6. the shifting gear transmission device of cylindrical sewing machine according to claim 1, it is characterized in that, should before send tooth drive link group to comprise to be socketed on this send before eccentric one the tooth drive rod, by axostylus axostyle jointly be articulated in send before this tooth drive rod one before send send before tooth connecting rod and one the tooth linking arm, and by another axostylus axostyle be articulated in send before this tooth connecting rod one before send the tooth swinging block, send before this tooth swinging block for should before send the cross-under of tooth power transmission shaft.
7. the shifting gear transmission device of cylindrical sewing machine according to claim 6, it is characterized in that, should before send before sending tooth adjustment group to comprise to send tooth beat piece before one and connect this tooth beat piece two before send tooth to wear axle, this send before two tooth wear axle wear respectively be articulated in this body and should before send the tooth linking arm, send tooth beat piece to locate by an elastomeric connection before this.
8. the shifting gear transmission device of cylindrical sewing machine according to claim 1, it is characterized in that, more comprise and send the tooth height adjusting, this send the tooth height adjusting to comprise to be socketed on this final drive shaft a cam, be socketed on this cam a connecting rod, be articulated in a beat piece of this connecting rod and be arranged in this beat piece and be articulated in one of this body and send the tooth power transmission shaft.
9. the shifting gear transmission device of cylindrical sewing machine according to claim 1, it is characterized in that, more comprise an indicating mechanism, this indicating mechanism comprises the dial that is fixed in this body, be fixed in the pointer that send tooth adjustment group after this, be fixed in an indicator board that send tooth adjustment group before this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810172741 CN101736530B (en) | 2008-11-11 | 2008-11-11 | Shifting gear transmission device of cylindrical sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810172741 CN101736530B (en) | 2008-11-11 | 2008-11-11 | Shifting gear transmission device of cylindrical sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101736530A CN101736530A (en) | 2010-06-16 |
| CN101736530B true CN101736530B (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810172741 Active CN101736530B (en) | 2008-11-11 | 2008-11-11 | Shifting gear transmission device of cylindrical sewing machine |
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| CN (1) | CN101736530B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046239B (en) * | 2011-10-14 | 2015-03-25 | 高林股份有限公司 | Cloth feeding device of sewing machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2587905Y (en) * | 2002-09-20 | 2003-11-26 | 卓瑞荣 | Small horizontal tube type sewing machine with differential feeding |
| CN1632208A (en) * | 2003-12-22 | 2005-06-29 | 高林股份有限公司 | Transmission arrangement for transfer teeth of cylinder type sewing machine |
| TWI271458B (en) * | 2005-09-22 | 2007-01-21 | Kaulin Mfg Co Ltd | The rack transmission structure of a cylindrical sewing machine |
| CN1978724A (en) * | 2005-11-29 | 2007-06-13 | 株式会社森本制作所 | Feeding device for sewing machine |
| JP4020372B2 (en) * | 2002-07-11 | 2007-12-12 | オルガノ株式会社 | Condensate treatment method and apparatus |
| TW200809036A (en) * | 2006-08-10 | 2008-02-16 | Kaulin Mfg Co Ltd | Transmission structure of feed dog of cylinder bed sewing machine |
| CN101135092A (en) * | 2006-08-28 | 2008-03-05 | 高林股份有限公司 | Transmission structure of round drum type sewing machine transfer gear |
-
2008
- 2008-11-11 CN CN 200810172741 patent/CN101736530B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4020372B2 (en) * | 2002-07-11 | 2007-12-12 | オルガノ株式会社 | Condensate treatment method and apparatus |
| CN2587905Y (en) * | 2002-09-20 | 2003-11-26 | 卓瑞荣 | Small horizontal tube type sewing machine with differential feeding |
| CN1632208A (en) * | 2003-12-22 | 2005-06-29 | 高林股份有限公司 | Transmission arrangement for transfer teeth of cylinder type sewing machine |
| TWI271458B (en) * | 2005-09-22 | 2007-01-21 | Kaulin Mfg Co Ltd | The rack transmission structure of a cylindrical sewing machine |
| CN1978724A (en) * | 2005-11-29 | 2007-06-13 | 株式会社森本制作所 | Feeding device for sewing machine |
| TW200809036A (en) * | 2006-08-10 | 2008-02-16 | Kaulin Mfg Co Ltd | Transmission structure of feed dog of cylinder bed sewing machine |
| CN101135092A (en) * | 2006-08-28 | 2008-03-05 | 高林股份有限公司 | Transmission structure of round drum type sewing machine transfer gear |
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| CN101736530A (en) | 2010-06-16 |
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