CN2116016U

CN2116016U - Double-cam figure varying mechanism of sewing machine

Info

Publication number: CN2116016U
Application number: CN 92202562
Authority: CN
Inventors: 吴昌铭
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-19
Filing date: 1992-02-19
Publication date: 1992-09-16

Abstract

The utility model relates to a double-cam needle vehicle figure varying mechanism of a sewing machine, comprising two cams X, Y arranged perpendicularly, a gear box 10, a set of X-axis driving plate 70 and a Y-axis driving plate 50. The power of a motor is transferred to a worm and gear system arranged inside the gear box through a driving shaft 100 to push the X and Y-axis driving plates 70, 50 and control variable-speed driving spur wheel 202, an idle gear 302, a driving wheel 402 and a check one-way bearing meshed with the X-axis driving plate, so that a feeding table top and the actuating route of sewing needle track distance are controlled by the shape of the cams. With the utility model, the figures are smooth, the needle tracks are uniform, and the patterns and figures can be changed at any time without having the states of breaking threads, twisting threads, breaking needles in sewing.

Description

Double-cam figure varying mechanism of sewing machine

The utility model relates to a kind of improvement of sewing tool.

People like beautiful jewelry, especially closely bound up with our daily life textiles, as cotton-wadded quilt, clothing, Curtains Fabrics etc., people require it except possessing function own, also have decorative aesthetics, along with the raising of people's living standard, requirement to consumption quality amount is also more and more high, even connect cloth make needle tracking, needle gage, lines etc., it is firm not only to need to make, also needing to possess beautiful decorative pattern increases aesthetic feeling.

The sewing sweep and the wrap patterning unit of common Sewing machines; shown in the 1st figure and the 2nd figure, wherein the sewing needlework of Fig. 1 have only the straight line function, the feeding table top 1 that Fig. 2 has pattern track 3 and moves with pattern mechanism 2; but make sewing needlework koji line, these two kinds of mechanisms in use have following shortcoming:

(1) the straight line needle plate decorative pattern mechanism of Fig. 1 does not possess any needle tracking variation, is sewing cloth merely, and product does not have aesthetic feeling.

(2) though the pattern needle plate decorative pattern mechanism of Fig. 2 has the function of curvilinear motion, owing to need to keep homogeneity of product with artificial promotion.

(3) sewing needle of above-mentioned two kinds of mechanisms is independent fully with the driving of car needle stand 4 and feeding table top and spiral feeding axis, therefore when initial and the most last feeding and during curve sewing machine decorative pattern, stroke can't cooperate feeding speed and curvilinear motion about it is evident that very much sewing needle, cause the thread pitch not wait, make product quality reduce.

The purpose of this utility model is to propose the wheeled needle feeding apparatus of a kind of biconvex, and it utilizes two-jawed to rotate, and makes feeding table top and sewing needle tracking controlled by cam face apart from actuating length, and it is smooth and easy to obtain having decorative pattern, the product of needle tracking uniform curve needle tracking.

Two of the purpose of this utility model is: cam face can be shaped the decorative pattern shape of desiring to make by the design and the market demand with different cam contours, become the changeable mechanism that can change cam, makes and produces the Lv Gengxin variation soon, and equipment replacement is easy.

The 3rd purpose of the present utility model is: X has non-return unilateral bearing to camshaft, when accidentally motor being reversed because of functional failure of electromechanical or operating personnel, and the accidents such as broken string, twisted wire and even broken needle that the existing Sewing machines of unlikely generation often occurs.

The utility model is achieved in that a kind of double cam Sewing machines sewing machine decorative pattern changeable mechanism, comprise cam, the feeding table top, the car pin, it is characterized in that: in gear-box, be horizontally disposed with the Y cam and with the Y-axis drive plate 50 of its interlock, vertically be provided with the X cam and with the X-axis drive plate 70 of its interlock, driving shaft 100 1 termination motors, end is by the power transmission shaft 200 in the gear-box in addition, idler shaft 300, driving shaft 400, Y is to camshaft 500, X is to camshaft 600, non-return axle 700a, 700b, couple axle 800, the worm and gear system of torsion shaft 900, transmission Y-axis drive plate 50, X-axis drive plate 70 and the car pin power transmission shaft 90 that is connected with torsion shaft are to feeding table top 1; Needle tracking changes guiding mechanism and comprises: Y is to camshaft 500, be placed in cam Y and the roller 51a of Y on camshaft, the 51b contact, this

roller

51a, 51b is fixed on the Y-axis drive plate 50, X is vertical to camshaft with Y to camshaft 700, be placed in cam X and the roller 71a of X on camshaft, the 71b contact, this

roller

71a, 71b is fixed on the X-axis drive plate 70 of both sides band tooth bar, driving shaft 100 1 termination motors, in addition end by worm screw 103 and with worm gear 201 engagements of power transmission shaft 200, power transmission shaft 200 is 90 ° with driving shaft 100, the end in addition of power transmission shaft 200 is by spur gear 202 engagements 302,402, the spur gear 401 of transmission driving shaft 400, this spur gear 401 and spur gear 502 engagements of Y to camshaft 500 left ends are established umbrella shape helical gear 503 and helical gear 602 engagements of X to camshaft 600 lower ends at Y to camshaft 500 central authorities; The speed change guiding mechanism comprises: worm gear 201 drives three dismountable spur gears, be the spur gear 202 of power transmission shaft, the spur gear 302 of idler shaft, the spur gear 402 of driving shaft, this idler shaft 300 is fixing on the support plate 301 of one " Y " shape, and support plate 301 is fixed on holder 304 and the flange 303; Non-return safety guard comprises: at X to the camshaft 600 both sides non-return axle 700a that be arranged in parallel; 700b; this non-return axle 700a; there are two spur gear 701a the 700b upper end; the both sides tooth bar engagement of 701b and X-axis drive plate 70; non-return axle 700a; 700b is sheathed sleeve 703a in gear-box 10; 703b; this sleeve 703a; 703b; and be snug fit at the sleeve 603 of X to camshaft 600; respectively with spur gear 604; 704a; the 704b engagement; at sleeve 703a; the non-return unilateral bearing 702a of the inner installation of 703b; 702b; the helical gear 801 of establishing helical gear 605 mitered couple axles 800 bottom of sleeve 603; couple axle is held the helical gear 902 of helical gear 802 mitered torsion shafts 900 1 ends in addition, and torsion shaft 900 connects car pin power transmission shaft 90 by gear box side with universal joint 903.

The utlity model has following characteristics:

(1) according to structure of the present utility model, sewing needle tracking decorative pattern can change according to the profile combination of cam X, Y, makes product can closely follow market trends, has the great market competitiveness.

(2) owing to utilize double cam control cloth roll to send, send pin and curvilinear motion, make the needle tracking pitch even, do not produce big or small gap; And curve smoothing; The unlikely again waste product that is caused because of control carelessness manually, the yield rate height of producing.

(3) can draw identical decorative pattern but needle tracking pitch and the different needle tracking of curve spacing by the speed change guiding mechanism.

(4) have non-return protective device, in case even motor reverse, misoperation gear-box idle running and giving a warning.Complete machine adopts sealed, has

dismountable lid

11,12,13, the degree of safety when having increased work.

(5) establish clearance adjustment mechanism in the gear-box front, keep product and complete machine operate as normal.

Fig. 1 is an orthoscopic needle tracking decorative pattern structural scheme of mechanism.

Fig. 2 is a curvilinear style needle tracking decorative pattern structural scheme of mechanism.

Fig. 3 is the utility model front appearance figure.

Fig. 4 is the utility model back appearance figure.

Fig. 5 is the utility model gear combination stereogram.

Fig. 6 is the utility model top plan view.

Fig. 7 is the utility model elevation cross-sectional view.

Fig. 8 is the right pseudosection of the utility model.

Fig. 9 implements condition diagram for the utility model.

Now further narrate structure of the present utility model and embodiment in conjunction with the accompanying drawings:

Referring to Fig. 3～9: driving shaft 100 is positioned at the lower-left side of gear-box 10; the one end protrudes the outside socket belt pulley 101 of gear-box 10 and adjusts handwheel 14; belt pulley 101 is with 15 protections of belt protecting cover; motor is with odontoid belt 102 and belt pulley 101 transmission mutually; driving shaft 100 is held then in gear-box 10 in addition; socket worm screw 103 on it and with worm gear 201 engagement of power transmission shaft 200, power transmission shaft 200 is 90 ° with driving shaft 100.One end socket worm gear 201 of power transmission shaft 200, end exposes gear-box 10 left-external sides in addition, and the different spur gear 202 of the number of teeth is installed on it.Gear-box 10 left-external sides are the speed change guiding mechanism, the spur gear 202 of power transmission shaft 200 and the spur gear 302 of idler shaft 300, and idler shaft 300 is fixed on the support plate 301 of " Y " shape; 301 of this support plates are fixed on holder 304 and the flange 303, and the spur gear 402 of the spur gear 302 transmission driving shafts 400 of idler shaft 300, driving shaft 400 is positioned at gear-box 10 the inners and is connected to a spur gear 401, and this spur gear 401 meshes to the spur gear 502 of camshaft 500 left ends with Y again.It is horizontal that the centre that Y is positioned at gear-box 10 to camshaft 500 is level, and left end is established spur gear 502 and passed on power with driving wheel 402 engagements, and low order end is exposed to the gear-box 10 right outsides; The right outer side-line Y-axis of gear-box 10 is to drive system, be inserted in a cam Y and with 5011 lockings of cam pressing plate 501 and platen cover by Y to camshaft 500, cam Y its axial

urgent roller

51a, 51b,

roller

51a, 51b are fixed on Y-axis on drive plate 50, and Y-axis is accepted the strength that cam

Y promotion roller

51a, 51b are produced in drive plate 50 ties up to track plate 52, makes horizontal Y-motion; Y establishes umbrella shape helical gear 503 and helical gear 602 engagements of X to camshaft 600 lower ends to camshaft 500 central authorities, X is to the central authorities of camshaft perpendicular to gear-box 10, also be inserted in cam X and with cam pressing plate 601 and platen cover 6011 lockings at the epimere of axle, cam X is axially oppressing

roller

71a, 71b, and

roller

71a, 71b then is fixed on the X axis drive plate 70, the X axis drive plate slides about in track plate 72, the both sides of drive plate are the tooth bar shape, can promote non-return axle 700a, the spur gear 701a of 700b upper end, 701b, and X is to camshaft 600 and non-return axle 700a, 700b is and is arranged in parallel, central authorities at each go into sleeve 603 respectively, 703a, 703b, and sleeve 603,703a, 703b is provided with spur gear 604 simultaneously, 704a, 704b is intermeshing, at sleeve 704a, non-return unilateral bearing 702a is housed in the 704b, 702b, and sleeve 603 is established helical gear 605 bottom; The helical gear 605 of Y on the sleeve 603 of camshaft 600 and helical gear 801 mitereds of couple axle 800, couple axle 800 is placed in the block set 810 of gear-box 10 and respectively there is helical gear 801,802 at its two ends, one termination is closed X to camshaft 600, helical gear 902 mitereds of one end and torsion shaft 900, torsion shaft 900 outermost end are exposed to the front of gear-box 10, be inserted in slack adjuster 901 and pressing plate 9011, torsion shaft 900 has a universal joint 903 in gear-box 10 the inners, connect sewing needle power transmission shaft 90, constitute the wheeled sewing machine decorative pattern of biconvex changeable mechanism.

Course of action of the present utility model is: accept the power of motor when driving shaft 100 after, rotation is transmitted in a clockwise direction, drive worm screw 103,201, this segment worm gear worm screw is for adjusting reducing gear, make the high rotating speed of motor reduce to the slow-speed of revolution, high torsion, drive three disconnectable spur gears 202,302,402 of speed change guiding mechanism again by worm gear 201, spur gear 302 is idle pulleys, its function is to adjust sewing needle tracking pitch, and spur gear 202,402 is for adjusting the reciprocating stroke speed of Y-axis to drive plate 50; Transmit power to driving shaft 400 via spur gear 402, reach Y again to cam 500, cam Y turns clockwise and promotes roller 51a simultaneously, 51b, make Y-axis do straight reciprocating motion by the profile of cam Y to drive plate 50, and promotion feeding table top 1, simultaneously, Y to camshaft 500 by helical gear 503 pass on power to X to camshaft 600, its step and Y are similar to the promotion step of camshaft, make X axis drive plate 70 make level to reciprocating motion, and promote non-return axle 700a by the tooth bar of 70 two of X axis drive plates, the spur gear 701a of 700b upper end, 701b does gyration, because non-return axle 700a, 700b is equipped with non-return unilateral bearing 702a, 702b, make

sleeve

703a, 703b is only at non-return axle 700a, drive socket 603 when 700b turned clockwise, sleeve 603 is snug fit at X on camshaft 600, and sleeve 603 is during with counterclockwise transmission trace 800, this trace 800 is again with helical gear 802 pushing button mechanical axis 900, torsion shaft 900 is rotated in a counter-clockwise direction, and output is reversed power to car pin power transmission shaft 90.When moving right, X axis drive plate 70 makes spur gear 701a, 701b dextrorotation then when promoting non-return axle 700a, 700b,

sleeve

703a, 703b, 603, couple axle 800, torsion shaft 900 and even car pin power transmission shaft 90, owing to driving feed spool 41, car pin power transmission shaft 90 make cloth by direction input Sewing machines shown in Figure 9 processing place, and feed spool 41 drives car pin driver 40 simultaneously and makes car needle stand 4 knee-actions, cooperates Y-axis to promote feeding table tops 1 and finish curve sewing machine decorative pattern one to drive plate 50; Move right and work as X axis drive plate 70, cause spur gear 701a, 701b to be rotated counterclockwise, so non-return unilateral bearing 702a, 702b idle running makes feed spool 41 and car needle stand 4 all stop action, and Y-axis retracts feeding table top 1 to drive plate 50, prepares the curve sewing machine action of next stroke.

Claims

1, a kind of double cam Sewing machines sewing machine decorative pattern changeable mechanism, comprise cam, the feeding table top, the car pin, it is characterized in that: in gear-box, be horizontally disposed with the Y cam and with the Y-axis drive plate 50 of its interlock, vertically be provided with the X cam and with the X-axis drive plate 70 of its interlock, driving shaft 100 1 termination motors, end is by the power transmission shaft 200 in the gear-box in addition, idler shaft 300, driving shaft 400, Y is to camshaft 500, X is to camshaft 600, non-return axle 700a, 700b, couple axle 800, the worm and gear system of torsion shaft 900, transmission Y-axis drive plate 50, X-axis drive plate 70 and the car pin power transmission shaft 90 that is connected with torsion shaft are to feeding table top 1.

2, by the described double cam Sewing machines of claim 1 sewing machine decorative pattern changeable mechanism, it is characterized in that: needle tracking changes guiding mechanism and comprises: Y is to camshaft 500, be placed in cam Y and the roller 51a of Y on camshaft, the 51b contact, this roller 51a, 51b is fixed on the Y-axis drive plate 50, X is vertical to camshaft with Y to camshaft 700, be placed in cam X and the roller 71a of X on camshaft, the 71b contact, this roller 71a, 71b is fixed on the X-axis drive plate 70 of both sides band tooth bar, driving shaft 100 1 termination motors, in addition end by worm screw 103 and with worm gear 201 engagements of power transmission shaft 200, power transmission shaft 200 is 90 ° with driving shaft 100, the end in addition of power transmission shaft 200 is by spur gear 202 engagements 302,402, the spur gear 401 of transmission driving shaft 400, this spur gear 401 and spur gear 502 engagements of Y to camshaft 500 left ends are established umbrella shape helical gear 503 and helical gear 602 engagements of X to camshaft 600 lower ends at Y to camshaft 500 central authorities.

3, by the described double cam Sewing machines of claim 1 sewing machine decorative pattern changeable mechanism, it is characterized in that: the speed change guiding mechanism comprises: worm gear 201 drives three dismountable spur gears, be the spur gear 202 of power transmission shaft, the spur gear 302 of idler shaft, the spur gear 402 of driving shaft, this idler shaft 300 is fixing on the support plate 301 of one " Y " shape, and support plate 301 is fixed on holder 304 and the flange 303.

4; by the described double cam Sewing machines of claim 1 sewing machine decorative pattern changeable mechanism; it is characterized in that: non-return safety guard comprises: at X to the camshaft 600 both sides non-return axle 700a that be arranged in parallel; 700b; this non-return axle 700a; there are two spur gear 701a the 700b upper end; the both sides tooth bar engagement of 701b and X-axis drive plate 70; non-return axle 700a; 700b is sheathed sleeve 703a in gear-box 10; 703b; this sleeve 703a; 703b; and be snug fit at the sleeve 603 of X to camshaft 600; respectively with spur gear 604; 704a; the 704b engagement; at sleeve 703a; the non-return unilateral bearing 702a of the inner installation of 703b; 702b; the helical gear 801 of establishing helical gear 605 mitered couple axles 800 bottom of sleeve 603; couple axle is held the helical gear 902 of helical gear 802 mitered torsion shafts 900 1 ends in addition, and torsion shaft 900 connects car pin power transmission shaft 90 by gear box side with universal joint 903.