CN2365234Y

CN2365234Y - Needle-feeding and working feeding synchronous linkage mechanism with adjustable linking axle group

Info

Publication number: CN2365234Y
Application number: CN 99201348
Authority: CN
Inventors: 张宪进
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-02-08
Filing date: 1999-02-08
Publication date: 2000-02-23
Anticipated expiration: 2009-02-08

Abstract

The utility model relates to a needle-feeding and material-feeding synchronous couple mechanism with an adjustable couple axle group. The utility model provides a needle-feeding and material-feeding synchronous couple mechanism which can compensate for mechanism errors and can ensure synchronous needle-feeding and material-feeding. The utility model comprises a primary axle group, a couple axle group, a needle feeding group and a material feeding group. The couple axle group comprises a crank, a link rod, a couple axle, a left swing arm, a right swing arm, a swing axle and a connecter. The free end of the right swing arm is provided with a long hole. The link rod and a nut which is slidingly sheathed in the long hole of the right swing arm and can slide along the long hole are in screw connection through a couple pin which travels through a pivot-joint hole of the couple rod, and forms fine-adjustment pivot joint with the free end of the right swing arm.

Description

What have adjustable couple axle group send the pin feeding synchronous interlinked mechanism

The utility model belongs to accessaries of sewing machine, particularly a kind of have an adjustable couple axle group send the pin feeding synchronous interlinked mechanism.

General Sewing machines send the action of sewing of the synchronous interlinked mechanism of pin feeding by what comprise primary shaft group, couple axle group, send pin group and feeding group, the i.e. oscillating motion of the crank that articulates by the crankshaft structure of upper end and primary shaft group, upper and lower and the forward and backward motion of sending pin group pin post can be matched with the feeding tooth swing of feeding group, the pin that send the pin group can be interspersed between hole of feeding group feeding tooth, draw bands and bottom line with band and produce the sewing action that interweaves.Yet because the motion of above-mentioned two kinds of different shapes, all via a primary shaft drive that group is controlled, for the pin that send the pin group can be interspersed in the feeding perforation hole in the feeding group swing exactly, therefore, the synchronous interaction structure of sending the synchronous interlinked mechanism of pin feeding to need superprecision just can reach effective sewing action.As shown in Figure 3, the couple axle group of commonly using of sending the synchronous interlinked mechanism of pin feeding, its connecting rod is connected by the mode of screw with direct locking with the right swing arm that is fixedly mounted on the couple axle right-hand member, makes between right swing arm and the connecting rod and can't adjust.Because this commonly using between its right swing arm of structure and the connecting rod can't be adjusted, cause between the couple axle of its connection and balance staff and crank the position to adjust, therefore, the error that long-term relative motion abrasion produce to the tolerance of part own, assembly error and parts can't effectively correctly be revised.Make commonly use send the synchronous interlinked mechanism of pin feeding to cause interlock because of not adjusting the time can not be synchronous, it is inharmonious to produce pin and the swing of feeding tooth, make pin hole distortion, sewing thread trace not attractive in appearance, even generation eedle fracture, cause danger, cause the psychological burden of the many in use increase one decks of user.

The purpose of this utility model provide a kind of can to mechanism error compensate with guarantee to send the pin feeding synchronous have an adjustable couple axle group send the pin feeding synchronous interlinked mechanism.

The utility model comprises primary shaft group, couple axle group, send pin group and feeding group, and the primary shaft group comprises primary shaft, belt pulley, eccentric wheel and pull bar; The nearly right-hand member of primary shaft is provided with crankshaft structure; Belt pulley and eccentric wheel are fixedly mounted on the primary shaft right side, left end respectively; One end of pull bar is journaled on the eccentric wheel; The couple axle group comprises crank, connecting rod, couple axle, left swing arm, right swing arm, balance staff and fastener; The crankshaft structure of the upper end of crank and primary shaft group articulates, and the crank lower end articulates with connecting rod lower end and balance staff simultaneously by pivot pin; The right swing arm free end is offered slotted hole; Left and right swing arm is fixedly mounted on the left and right end of couple axle respectively, connecting rod by the linkage pin that passes its pivoted hole be slidingly located in the right swing arm slotted hole and can screw togather along the nut of slotted hole slippage, and constitute fine-tuning pivot joint between the right swing arm free end; Send the pin group to comprise pin post and pin column base; The pin post is slidingly mounted on the pin column base and can moves up and down within it; The other end of the upper end of pin post and primary shaft group pull bar articulates, and the other end of pin column base lower end and left swing arm articulates; The feeding group comprises swing arm and feeding tooth; The feeding tooth is fixedly mounted on the swing arm left end; The swing arm right-hand member is journaled on the body.

Because the utility model comprises primary shaft group, couple axle group, send pin group and feeding group, the primary shaft group comprises that nearly right-hand member is provided with the primary shaft of crankshaft structure, belt pulley, eccentric wheel and pull bar; The couple axle group comprises crank, connecting rod, couple axle, left swing arm, right swing arm, balance staff and fastener; The right swing arm free end is offered slotted hole; Connecting rod by the linkage pin that passes its pivoted hole be slidingly located in the right swing arm slotted hole and can screw togather along the nut of slotted hole slippage, and constitute fine-tuning pivot joint between the right swing arm free end; Send the pin group to comprise pin post and pin column base; The feeding group comprises swing arm and feeding tooth.When the error that produces because of part processing tolerance, assembly error and long-term relative motion abrasion, when causing sending the pin feeding synchronously, by moving the right swing arm slotted hole inner nut that is slidingly located in to adjust the position of right swing arm and connecting rod pivoting point, correction is fixedly mounted on couple axle left end left side swing arm amplitude of fluctuation, mechanism error is compensated, send the pin group pin column base amplitude of fluctuation and the feeding group feeding tooth amplitude of fluctuation of lower end and its pivot joint are coordinated, assurance send the pin feeding synchronous, thereby reaches the purpose of this utility model.

Fig. 1, be the utility model decomposition texture schematic isometric.

Fig. 2, be A portion partial enlarged drawing among Fig. 1.

Fig. 3, couple axle component solution structure schematic isometric for commonly using.

Below in conjunction with accompanying drawing the utility model is further elaborated.

As shown in Figure 1, the utility model comprises primary shaft group 1, couple axle group 2, send pin group 3 and feeding group 4, and primary shaft group 1 comprises primary shaft 11, belt pulley 12, eccentric wheel 13 and pull bar 14.Primary shaft 11 nearly right-hand members are provided with crankshaft structure 15.Belt pulley 12 and eccentric wheel 13 are fixedly mounted on the right side, the left end of primary shaft 11 respectively.One end of pull bar 14 is journaled on the eccentric wheel 13.

Couple axle group 2 comprises crank 20, connecting rod 21, couple axle 22, left swing arm 23, right swing arm 24, balance staff 25 and fastener 26.As shown in Figure 2, right swing arm 24 free ends are offered slotted hole 241.The crankshaft structure 15 of the upper end of crank 20 and primary shaft group 1 articulates, and crank 20 lower ends articulate with connecting rod 21 lower ends and balance staff 25 simultaneously by pivot pin 251.Make balance staff 25 only do low-angle waving with crank 20.Left and right swing arm 23,24 is fixedly mounted on the left and right end of couple axle 22 respectively, and connecting rod 21 screws togather by the nut 28 in the linkage pin 27 that passes its pivoted hole 211 and right swing arm 24 slotted holes 241 that are slidingly located in, and constitutes fine-tuning pivot joint between the right swing arm 24.

As shown in Figure 1, send pin group 3 to comprise pin post 31 and pin column base 32.Pin post 31 is slidingly mounted on the pin column base 32 and can moves up and down within it.The other end of the upper end of pin post 31 and primary shaft group 1 pull bar 14 articulates, and the other end of pin column base 32 lower ends and left swing arm 23 articulates, and makes the pin post 31 that is slidingly mounted in the pin column base 32 do swing when moving up and down.

Feeding group 4 comprises swing arm 41 and feeding tooth 42.Feeding tooth 42 is fixedly mounted on swing arm 41 left ends.Swing arm 41 right-hand members are journaled on the body.Swing arm 41 nearly left ends articulate by fastener 26 and balance staff 25 front ends.Make swing arm 41 under the balance staff that waves as low-angle with crank 20 25 effects of couple axle group 1, do swing, with drive feeding tooth 42 do before and after the feeding campaigns, and then reach the feeding tooth 42 front and back feeding synchronized movement with feeding group 4 of seesawing up and down of the pin post 31 that send pin group 3.The oscillating motion of the crank 20 that can articulate by the crankshaft structure 15 of upper end and primary shaft group 1, driven in synchronism send the pin post 31 of pin group 3 to seesaw up and down and the feeding tooth 42 of feeding group 4 is done front and back feeding campaign, to reach effective sewing action.

When the error that produces because of part processing tolerance, assembly error and long-term relative motion abrasion, in the time of will causing sending the pin feeding synchronously, by moving right swing arm 24 slotted holes 241 inner nuts 28 that are slidingly located in, to adjust the position of right swing arm 24 and connecting rod 21 pivoting points, correction is fixedly mounted on couple axle 22 left ends left side swing arm 23 amplitudes of fluctuation, mechanism error is compensated, pin column base 32 amplitudes of fluctuation of sending pin group 3 and feeding group 4 feeding teeth 42 amplitudes of fluctuation of lower end and its pivot joint are coordinated, assurance send the pin feeding synchronous, to obtain the optimal synchronisation movement effects.

The utility model will be fixedly mounted on couple axle right-hand member right swing arm and small end adopts fine-tuning portable the pivot joint, by the adjustment of doing the pivoting point position again, make mechanism recover accurate interlock synchronously, reach certain and safeguard the effective utilization that Sewing machines is good in the use and improve quality of sewing.

Claims

1, a kind of have an adjustable couple axle group send the pin feeding synchronous interlinked mechanism, it comprises primary shaft group, couple axle group, send pin group and feeding group, the primary shaft group comprises primary shaft, belt pulley, eccentric wheel and pull bar; The nearly right-hand member of primary shaft is provided with crankshaft structure; Belt pulley and eccentric wheel are fixedly mounted on the primary shaft right side, left end respectively; One end of pull bar is journaled on the eccentric wheel; The couple axle group comprises crank, connecting rod, couple axle, left swing arm, right swing arm, balance staff and fastener; The crankshaft structure of the upper end of crank and primary shaft group articulates, and the crank lower end articulates with connecting rod lower end and balance staff simultaneously by pivot pin; Left and right swing arm is fixedly mounted on the left and right end of couple axle respectively, and small end and right swing arm free end articulate; Send the pin group to comprise pin post and pin column base; The pin post is slidingly mounted on the pin column base and can moves up and down within it; The other end of the upper end of pin post and primary shaft group pull bar articulates, and the other end of pin column base lower end and left swing arm articulates; The feeding group comprises swing arm and feeding tooth; The feeding tooth is fixedly mounted on the swing arm left end; The swing arm right-hand member is journaled on the body; It is characterized in that described right swing arm free end offers slotted hole; Connecting rod by the linkage pin that passes its pivoted hole be slidingly located in the right swing arm slotted hole and can screw togather along the nut of slotted hole slippage, and constitute fine-tuning pivot joint between the right swing arm.