The driving mechanism that is used for the multi-needle bar Sewing machines
Technical field
The present invention relates to a kind of multi-needle bar Sewing machines, specifically be used for the driving mechanism of multi-needle bar Sewing machines.
Background technology
Existing Sewing machines generally includes axle, and upper axle drives a shank by shank drive link assembly and moves up and down, and shank penetrates the pin hole on the needle plate when moving up and down, and the bottom line on making upper thread and being installed in end shuttle cooperates to be sewed up cloth.Along with the raising of sewing processing request, sometimes need to use the upper thread of different colours in the cloth sewing, add the artificial thread-changing of needs in man-hour in sewing like this, complex operation, the working (machining) efficiency that causes sewing is low.
Utility model title: the shank of two-needle sewing machine and switching mechanism thereof, application number: 201120342948, a kind of shank and switching mechanism thereof of two-needle sewing machine are disclosed, shank comprises a hollow shank body, the lower end of shank body is fixedly connected with a shank head that is used for installing eedle, be equiped with successively back-moving spring in the described shank body, the first voussoir, the second voussoir and switching depression bar, expose in the shank body upper end of switching depression bar, the tip of the first voussoir down, the tip of the second voussoir up, position corresponding to the first voussoir on the sidewall of shank body offers the first through hole, is provided with the first slide block in the first through hole; Position corresponding to the second voussoir on the sidewall of shank body offers the second through hole, is provided with the second slide block in the second through hole.The shank switching mechanism comprises shank, needle bar frame, shank cover, needle bar drive device and switching briquetting, and the shank cover links to each other with needle bar drive device, and needle bar frame also is connected with translating device.The crosspointer bar of this utility model technology can wear the upper thread of two kinds of different colours, and therefore can once sew has the pattern of two kinds of colors, has exempted the trouble of manual thread-changing.But this crosspointer bar complex structure, requirement on machining accuracy is high, so manufacturing cost is large; And when the pattern of sewing color more than three kinds or three kinds, still need manual thread-changing.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned prior art present situation, and is provided for the driving mechanism of multi-needle bar Sewing machines, simplified work structuring, and solved prior art can't be to three shanks or the problem that drives of more number shank more.
The present invention solves the problems of the technologies described above the technical scheme that adopts: the driving mechanism that is used for the multi-needle bar Sewing machines, comprise installing plate and shank installing rack, installing plate is fixed with motor by support, the driving shaft of described motor is connected with gear, and the shank installing rack is fixed with the tooth bar that is meshed with gear.
For optimizing technique scheme, the present invention also comprises following improved technical scheme.
Above-mentioned support is equipped with horizontally disposed guide rail, and shank installing rack and guide rail are slidingly matched.
Above-mentioned shank installing rack is provided with at least two spaced apart shanks; Each root shank can move up and down with respect to the shank installing rack.
Above-mentioned installing plate is installed with the axis of guide, and the axis of guide is provided with the shank drive block that can move up and down; Shank is shaped with guide way, and the shank drive block is shaped with the draw-in groove that can fasten with guide way.
Above-mentioned installing plate is provided with the first guide pad and the second guide pad in the both sides of shank drive block; The first guide pad is shaped with first horizontal guide slot that can be slidingly matched with guide way; The second guide pad is shaped with second horizontal guide slot that can be slidingly matched with guide way.
Above-mentioned shank is fixed with card column by the shank anchor ear, and guide way is positioned on the card column.
Above-mentioned shank installing rack has vertical chute; Card column has the slide body that is slidingly matched with chute.
Above-mentioned shank installing rack is provided with three shanks, and motor can be sent each shank into separately draw-in groove by gear and rack-driving.
Compared with prior art, the driving mechanism for the multi-needle bar Sewing machines of the present invention by the rotational angle of programming automation control motor, can be controlled the movement position of shank installing rack easily.In the motion process of shank installing rack, by the first horizontal guide slot and the second horizontal guide slot each shank is led, when motor-driven shank installing rack moves to a certain travel position, just the shank that the trip position is corresponding is sent into the draw-in groove of shank drive block, and by the 5 drive work of shank drive block.Therefore, the shank installing rack can have two, three or the more shanks of installation, and can drive any shank by driving mechanism and snap in draw-in groove and enter duty, thereby satisfy the sewing demand of two colored patterns, trichromatic diagram case or most patterns, and has advantages of simple in structure, automation control, solve single needle bar Sewing machines and crosspointer bar Sewing machines upper thread color category in pattern sewing process inadequate, needed the problem of manual thread-changing.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Figure 1 shows that structural representation of the present invention.
Reference numeral wherein is: installing plate 1, the first horizontal guide slot 11, the second horizontal guide slot 12, the first guide pad 13, the second guide pad 14, support 2, guide rail 21, slide block 22, shank installing rack 3, shank axle sleeve 31, shank 4, card column 41, guide way 41a, slide body 41b, shank anchor ear 42, shank drive block 5, draw-in groove 5a, the axis of guide 51, motor 7, gear 71, tooth bar 72.
The present invention is used for the driving mechanism of multi-needle bar Sewing machines, comprises the installing plate 1 that is positioned at the sewing machine head front end.Installing plate 1 slides by support 2 and is fitted with shank installing rack 3.Be fixed with horizontally disposed guide rail 21 at support 2, shank installing rack 3 is connected with slide block 22 on the guide rail 21.
Installing plate 1 is installed with motor 7 by support 2, and the driving shaft of motor 7 is connected with gear 71.Be provided with the tooth bar 72 that is meshed with gear 71 at shank installing rack 3.
Shank installing rack 3 is provided with at least two shanks spaced apart 4.Every shank 4 respectively with 3 axial sliding fits of shank installing rack, can move up and down with respect to shank installing rack 3.Shank number of the present invention is preferably two to four, and every shank 4 all is equipped with eedle, and every eedle can be selected a kind of upper thread of color.
Installing plate 1 is fixed with the axis of guide 51, and shank drive block 5 is slidingly arranged on the vertical axis of guide 51.Upper axle by Sewing machines and shank drive link assembly can drive shank drive block 5 and move up and down along the axis of guide 51.Shank 4 is shaped with guide way 41a, and shank drive block 5 is shaped with the draw-in groove 5a that can fasten with guide way 41a.When a certain shank 4 under driving mechanism drives, when snapping in draw-in groove 5a, just can move up and down and carry out sewing work.
Installing plate 1 is equipped with the first guide pad 13 and the second guide pad 14 in the both sides of shank drive block 5.The first guide pad 13 is shaped with first horizontal guide slot 11 that can be slidingly matched with guide way 41a.The second guide pad 14 is shaped with second horizontal guide slot 12 that can be slidingly matched with guide way 41a.
During shank 4 that switch operating is used, upper axle drives shank drive block 5 and rests on definite height, makes draw-in groove 5a and the first horizontal guide slot 11 and the second horizontal guide slot 12 be positioned at same level.Shank installing rack 3 is during along guide rail 21 horizontal movement, driving shank 4 moves along the first horizontal guide slot 11, draw-in groove 5a and the second horizontal guide slot 12, when needing the specific shank 4 of certain root to enter duty, shank installing rack 3 just moves to corresponding travel position, and this specific shank 4 is snapped among the draw-in groove 5a.Under the drive of shank drive block 5, this shank 4 just can move up and down and enter duty.
The present invention can control the angle that motor 7 rotates by programming automation ground, thus the travel position of control shank installing rack 3.No matter shank installing rack 3 is equipped with two, the three still shanks 4 of more number more, drive shank installing rack 3 by motor 7, any shank 4 is snapped among the draw-in groove 5a, thereby satisfy the sewing demand of two colored patterns, trichromatic diagram case or most patterns.
Every shank 4 all is fixedly connected with card column 41, and guide way 41a is positioned on the card column 41.Every shank 4 is fixed with two shank anchor ears 42, by the fixing card column 41 of shank anchor ear 42.Card column 41 also can be made into integration with the body of rod of shank 4.
Shank installing rack 3 has vertical chute, and card column 41 has the slide body 41b that is slidingly matched with chute, so that shank 4 improves stability when moving up and down, prolongs working life.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.