CN102337644B - Feeding driving device for sewing machine - Google Patents

Feeding driving device for sewing machine Download PDF

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Publication number
CN102337644B
CN102337644B CN 201110220958 CN201110220958A CN102337644B CN 102337644 B CN102337644 B CN 102337644B CN 201110220958 CN201110220958 CN 201110220958 CN 201110220958 A CN201110220958 A CN 201110220958A CN 102337644 B CN102337644 B CN 102337644B
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CN
China
Prior art keywords
wedge
sides
clutch
movable block
feed spool
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CN 201110220958
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CN102337644A (en
Inventor
朱小峰
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SUZHOU RIHE SEWING EQUIPMENT CO Ltd
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SUZHOU RIHE SEWING EQUIPMENT CO Ltd
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Abstract

The invention discloses a feeding driving device for a sewing machine, wherein a left wedge-shaped fork opening and a right wedge-shaped fork opening are eccentrically sheathed on a driving shaft, so when the driving shaft rotates, the eccentric left and right wedge-shaped fork openings move in the radial direction, the left and right wedge-shaped fork openings are butted against left and right wedge-shaped moving blocks, at least one butted surface is in inclined arrangement, the left and right wedge-shaped moving blocks can be pushed to move in the axial direction through the radial movement of the left and right wedge-shaped fork openings, then, a pin roller enters a wide part of an accommodating space through the rotation of a pulling claw, or the left and right wedge-shaped moving blocks are pushed to move in a reverse direction under the effect of the elastic rebounding force of a second elastic element, then, the pin roller enters a narrow part of the accommodating space under the effect of the elastic rebounding force of a first elastic element, the separation and the reunion of a left clutch and a right clutch are realized, the left and right wedge-shaped fork openings are always in contact with the wedge-shaped moving block in the separation and reunion processes of the left and right clutches, the collision is avoided, the noise is reduced, the incomplete separation and reunion condition caused by the inertia effect is avoided, and the stable feeding is ensured.

Description

Feeding driving device for sewing machine
Technical field
The present invention relates to feeding driving device for sewing machine.
Background technology
On Sewing machines, existing feeding driving device comprises transmission mechanism, swing mechanism, about two clutches, two connecting rods, transmission mechanism comprises power transmission shaft, be set in the cam on the power transmission shaft, cam is provided with the guide groove of arc Qu Bianhua, swing mechanism comprises swing arm, be arranged on the roller on swing arm one end, promote ring, feed spool, about two clutches all adopt double rolling key clutch, comprise shell, place the rotor of shell, scrolling realization by roller between rotor and the shell from close, during this feeding driving device work, the rotation of power transmission shaft band moving cam, and nationality should be located in the guide groove of set arc Qu Bianhua on the cam by the pair of rollers on swing arm one end of swing mechanism, so that swing arm is being pushed away by interlock and is promoting ring and make the intermittence of left and right directions and move, when the promotion ring moves on to the left side, by promoting locating detent turn on the clutch of left side, so that the left side clutch be in from state, this moment, right side clutch was in the state that closes, when the promotion ring moves on to the right side, then opposite, namely the left side clutch is in the state that closes, right side clutch be in from state, again simultaneously two connecting rods respectively with about the link pin of two clutches mutually be combined actively, then by promoting the move left and right of ring, two clutches about intermittently driving in turn, and then so that feed spool produces intermittent directional rotating, reach the feeding effect.But, existing feeding driving device is when running up, promote the locating detent of the move left and right collision clutch of ring, the noise that produces is very large, moreover, and when running up, owing to promoting the inertia that ring exists, easily cause the move left and right that promotes to encircle not in place, namely cause the clutch of clutch not thorough, cause the unstable of feeding.
Summary of the invention
Thereby the purpose of this invention is to provide by wedge prong conflict wedge movable block move to finish clutch from realizing stablize the feeding driving device for sewing machine of feeding with closing, reduced like this noise, guaranteed clutch from stablizing of closing.
For achieving the above object, the technical solution used in the present invention is: feeding driving device for sewing machine comprises
The wobble crank axle that can swing up and down;
Feeding crank under feeding crank and the pin on the pin, on the described pin under feeding crank and the pin the equal fixed cover of feeding crank be located on the described wobble crank axle;
First connecting rod and second connecting rod, an end of described first connecting rod and second connecting rod respectively with described pin on the feeding crank setting that rotates under feeding crank and the pin;
Feed spool;
Left and right sides double rolling key clutch, the described double rolling key clutch in the left and right sides includes
Shell with round cavity, described shell fixed cover is located on the described feed spool, and the shaft centre line of described round cavity and the shaft centre line of described feed spool coincide;
Be arranged in the described round cavity and can be set in rotationally clutch inner core on the described feed spool, described clutch inner core has a plurality of along the spaced pellet of the circumferencial direction of described round cavity, and the adjacent side of two described pellets of arbitrary neighborhood forms the receiving space of outer narrow inner width all and between the circumferential cavity wall of described round cavity;
A plurality of pusher dogs, be provided with the pin that extends along the axial direction of described feed spool between two pellets of described arbitrary neighborhood, all can be arranged with rotationally two described pusher dogs arranged in a crossed manner on each described pin, an end of described a plurality of pusher dogs all stretches out the outside at described clutch inner core;
Can rollably be arranged on respectively in the described receiving space and can be respectively pushed away a plurality of rollers at the wide place that enters described receiving space of rolling by the other end of described a plurality of pusher dogs, the axial line of each described roller all extends along the axial direction of described feed spool;
A plurality of being arranged on can provide described roller elastic-restoring force between described pellet and the described roller so that this roller enters first elastic component at the narrow place of described receiving space;
Pusher dog in the double rolling key clutch of the described left and right sides is oppositely arranged, the other end of described first connecting rod and second connecting rod respectively with described left and right sides double rolling key clutch in the setting that rotates of clutch inner core, on the perspective plane perpendicular to described feed spool axial line, the both sides that are rotationally connected the central point that a little lays respectively at described feed spool or described clutch inner core of the described clutch inner core in described first connecting rod and second connecting rod and the left and right sides, and with this central spot on the same line, when described roller enters the wide place of described receiving space, gapped between the circumferential cavity wall of described roller and described round cavity; When described roller entered the narrow place of described receiving space, described roller was clamped between the circumferential cavity wall of corresponding described pellet and described round cavity;
The driving shaft that can rotate;
Left and right sides wedge prong, described left and right sides wedge prong all is set on the described driving shaft prejudicially, and described left and right sides wedge prong is opposite with respect to the eccentric direction of described driving shaft;
Left and right sides wedge movable block, described left and right sides wedge movable block all can be set in along the axial direction of described feed spool on the described feed spool movably, between the pusher dog and the bifurcated of left described wedge prong of left described wedge movable block in the described double rolling key clutch in a left side, between the pusher dog and the bifurcated of right described wedge prong of right described wedge movable block in the described double rolling key clutch in the right side, described left and right sides wedge movable block all has and is enlarge gradually on away from the axial direction of corresponding described pusher dog tapered and can stretches out at the inconsistent outer surface of an end of described clutch inner core outside with corresponding described a plurality of pusher dogs, described left and right sides wedge movable block is inconsistent with the bifurcated of described left and right sides wedge prong respectively, at least one surface tilt ground arranges in the inconsistent surface of the bifurcated of described left and right sides wedge movable block and corresponding described wedge prong, and the inclined surface in the inconsistent surface of the bifurcated of described left wedge movable block and described left wedge prong, the incline direction of the inclined surface in described right wedge movable block and the inconsistent surface of the bifurcated of described right wedge prong is opposite;
Be arranged on the second elastic component that this wedge movable block elastic-restoring force can be provided between described clutch inner core and the described wedge movable block.
Preferably, fixed cover is provided with left and right sides eccentric wheel on the described driving shaft, described left and right sides eccentric wheel is through in the wedge prong of the described left and right sides by bearing respectively, the bifurcated of described left and right sides wedge prong roughly stretches out along the radial direction of described driving shaft, described driving shaft parallels setting with the axial line of described feed spool, on the perspective plane perpendicular to described driving shaft or described feed spool, described left and right sides eccentric wheel is according to the symmetrical setting of the central point of described driving shaft or described feed spool.
Preferably, fixed cover is provided with retainer ring on the described feed spool, and described retainer ring is between the bifurcated of described left and right sides wedge prong, and the bifurcated of described left and right sides wedge prong all is resisted against on the radial surface of described retainer ring.
Preferably, an end of described first connecting rod and second connecting rod respectively with described pin under feeding crank and the pin rotary centerline, described first connecting rod and the second connecting rod of feeding crank the other end respectively with described left and right sides double rolling key clutch in the rotary centerline, the axial line homogeneous phase of described feed spool of clutch inner core be arranged in parallel.
Preferably, the inconsistent surface of the bifurcated of described left wedge movable block and described left wedge prong all is obliquely installed in the same direction, the inconsistent surface of the bifurcated of described right wedge movable block and described right wedge prong also all is obliquely installed in the same direction, the symmetrical setting of incline direction of the inclined surface of the inclined surface of described left wedge movable block, described right wedge movable block.
Because the utilization of technique scheme, the present invention compared with prior art has following advantages: left and right sides wedge prong is set on the driving shaft prejudicially, when driving shaft rotates like this, eccentric left and right sides wedge prong can move radially, left and right sides wedge prong and left and right sides wedge movable block are inconsistent, at least one is obliquely installed in the inconsistent surface, can promote left and right sides wedge movable block by moving radially of left and right sides wedge prong like this moves axially, then the rotation by pusher dog is so that roller enters the wide place of receiving space, perhaps the elastic-restoring force by the second elastic component can promote reverse movement of left and right sides wedge movable block work, then under the elastic-restoring force effect of the first elastic component so that roller enters the narrow place of receiving space, thereby realized left and right sides clutch from close, since left and right sides clutch from the process of closing in, left and right sides wedge prong contacts all the time with left and right sides wedge movable block, avoided collision, reduced noise, and left and right sides wedge prong to the impetus of left and right sides wedge movable block be by left and right sides wedge prong on driving shaft since eccentric moving radially of causing cause, avoided because the halfway situation of clutch that effect of inertia causes, realized left and right sides clutch stably from close, guaranteed the stable of feeding.
Description of drawings
Accompanying drawing 1 is schematic perspective view of the present invention;
Accompanying drawing 2 is STRUCTURE DECOMPOSITION schematic diagram of the present invention;
The schematic top plan view that accompanying drawing 3 matches for left and right sides wedge prong, left and right sides wedge movable block and left and right sides clutch among the present invention.
The specific embodiment
Further set forth structure of the present invention below in conjunction with accompanying drawing.
Shown in Fig. 1-3, feeding driving device for sewing machine, comprise the wobble crank axle 20 that can swing up and down, feeding crank 23 under feeding crank 21 and the pin on the pin, first connecting rod 19 and second connecting rod 19, feed spool 1, left and right sides double rolling key clutch 25, the driving shaft 10 that can rotate, left and right sides wedge prong 14 and 12, left and right sides wedge movable block 9, on the pin under feeding crank 21 and the pin feeding crank 23 equal fixed covers be located on the wobble crank axle 20, one end of first connecting rod 19 and second connecting rod 19 respectively with pin on feeding crank 23 setting that rotates under feeding crank 21 and the pin, wobble crank axle 20 is when swinging up and down like this, swing up and down with feeding crank 23 under feeding crank 21 and the pin on the pin, realized moving up and down of first connecting rod 19 and second connecting rod 19.Left and right sides double rolling key clutch 25 is existing friction clutch, left and right sides double rolling key clutch 25 includes shell 4, clutch inner core 2, a plurality of pusher dog 22, a plurality of roller 6 with round cavity 26, shell 4 fixed covers are located on the feed spool 1, the shaft centre line of the round cavity 26 of shell 4 and the shaft centre line of feed spool 1 coincide, the rotation of shell 4 can drive the rotation of feed spool 1, can realize feeding.Clutch inner core 2 is arranged in the round cavity 26, clutch inner core 2 can be set on the feed spool 1 rotationally, clutch inner core 2 has a plurality of along the spaced pellet 5 of the circumferencial direction of round cavity 26, the adjacent side 27 of two pellets 5 of arbitrary neighborhood forms the receiving space of outer narrow inner width all and between the circumferential cavity wall of round cavity 26, a plurality of rollers 6 can rollably be arranged in the receiving space respectively, the axial line of each roller 6 all extends along the axial direction of feed spool 1, be provided with the pin 28 that extends along the axial direction of feed spool 1 between two pellets 5 of arbitrary neighborhood, all can be arranged with rotationally two pusher dogs arranged in a crossed manner 22 on each pin 28, one end of a plurality of pusher dogs 22 all stretches out the outside at clutch inner core 2, as shown in Figure 2, the other end of a plurality of pusher dogs 22 can push away respectively the wide place that roller 6 rollings enter receiving space, when roller 6 enters the wide place of receiving space, gapped between the circumferential cavity wall of roller 6 and round cavity 26, like this clutch inner core 2 and shell 4 be in from state, be that clutch inner core 2 can rotate with respect to shell 4 and feed spool 1, be provided with the first elastic component between each pellet 5 of clutch inner core 2 and the corresponding roller 6, rely on the elastic-restoring force of the first elastic component can push away the narrow place that roller 6 enters receiving space, when roller 6 rollings enter the narrow place of receiving space, roller 6 is clamped between the circumferential cavity wall of the pellet 5 of clutch inner core 2 and round cavity 26, clutch inner core 2 is in the state that closes with shell 4 like this, be that clutch inner core 2 can rotate with shell 4, thereby also rotate together with feed spool 1.The outer narrow inner width of receiving space so that roller 6 can be under the effect of pusher dog 22 and the first elastic component, realize clutch 25 from close, moreover, the outer narrow inner width of receiving space has also played position-limiting action to roller 6, so that roller 6 can only roll in receiving space.
Pusher dog 22 in the left and right sides double rolling key clutch 25 is oppositely arranged, as shown in Figure 3, left and right sides wedge prong 14 and 12 with left and right sides wedge movable block 9 cooperate rotation by control pusher dog 22 realize to clutch 25 from the control of closing, specifically, left and right sides wedge prong 14 and 12 all is set on the driving shaft 10 prejudicially, and left and right sides wedge prong 14 and 12 is opposite with respect to the eccentric direction of driving shaft 10, because eccentric setting, when driving shaft 10 rotates around the Pivot Point Center line, left and right sides wedge prong 14 and 12 movements that can occur in the radial direction, and because eccentric opposite direction, then left and right sides wedge prong 14 and 12 the direction that moves radially are also opposite.Left and right sides wedge movable block 9 all can be set in along the axial direction of feed spool 1 on the feed spool 1 movably, between the pusher dog 22 and the bifurcated 13 of left wedge prong 14 of left wedge movable block 9 in left double rolling key clutch 25, between the pusher dog 22 and the bifurcated 18 of right wedge prong 12 of right wedge movable block 9 in right double rolling key clutch 25, the direction on " left side " " right side " here refers to such an extent that be that the observer is when facing Fig. 3, observer's the left side is " left side " here, the right of observer is " right side " here, left and right sides wedge movable block 9 all has and is the tapered outer surface that enlarges gradually on away from the axial direction of corresponding pusher dog 22, because the outer surface of left and right sides wedge movable block 9 is tapered, left and right sides wedge movable block 9 is when the axial direction along feed spool 1 moves like this, the outer surface of left and right sides wedge movable block 9 can stretch out at an end of clutch inner core 2 outsides inconsistently with corresponding a plurality of pusher dogs 22, rotates thereby promote pusher dog 22.Moving axially by left and right sides wedge prong 14 and 12 regulation and control of left and right sides wedge movable block 9, left and right sides wedge movable block 9 is inconsistent with the bifurcated 13 and 18 of left and right sides wedge prong 14 and 12 respectively, at least one surface 3 arranges obliquely in left and right sides wedge movable block 9 and the inconsistent surface of the bifurcated of corresponding wedge prong, in Fig. 3, the bifurcated 13 inconsistent surfaces of left wedge movable block 9 and left wedge prong 14 all are obliquely installed in the same direction, the bifurcated 18 inconsistent surfaces of right wedge movable block 9 and right wedge prong 12 also all are obliquely installed in the same direction, the inclined surface 3 of left wedge movable block 9, the incline direction of the inclined surface 3 of right wedge movable block 9 is opposite, in the present embodiment, the symmetrical setting of center line that the incline direction of the inclined surface 3 of left and right sides wedge movable block 9 extends according to the radial direction along feed spool 1 between the left and right sides wedge movable block 9.The surface that relies on, then left and right sides wedge prong 14 and 12 off-centre move and can promote moving axially of left and right sides wedge movable block 9, and then pusher dog 22 is pushed rotation.The second elastic component that these wedge movable block 9 elastic-restoring forces can be provided is set between clutch inner core 2 and wedge movable block 9, then in a single day left and right sides wedge movable block 9 has lost the motive force of left and right sides wedge prong 14 and 12, under the elastic-restoring force effect that relies on the second elastic component, reciprocal movement can occur, so also can solenoidoperated cluthes 25 from close.Because left and right sides wedge prong 14 contacts with left and right sides wedge movable block 9 respectively all the time with 12, rely on bifurcated 13 and 18 motive force and the elastic-restoring force effect of the second elastic component of left and right sides wedge prong 14 and 12, realized moving axially of left and right sides wedge movable block 9, then the rotation by pusher dog 22 is so that roller 6 is in wide place or the narrow place of receiving space, namely realized left and right sides clutch 25 from close, avoided like this collision, reduced noise, and the impetus of the bifurcated 13 of left and right sides wedge prong 14 and 12 and 18 pairs of left and right sides wedge movable blocks 9 be by left and right sides wedge prong 14 and 12 on driving shaft 10 since eccentric moving radially of causing cause, avoided because the clutch halfway situation that effect of inertia causes, realized left and right sides clutch 25 stably from close.
Make and install for convenient, in the present embodiment, the structure of left and right sides wedge prong 14 and 12 eccentric setting is as follows, fixed cover is provided with left and right sides eccentric wheel 7 on the driving shaft 10, left and right sides eccentric wheel 7 is through in left and right sides wedge prong 14 and 12 by bearing respectively, left and right sides wedge prong 14 and 12 bifurcated 13 and 18 all roughly stretch out along the radial direction of driving shaft 10, driving shaft 10 parallels setting with the axial line of feed spool 1, like this left and right sides wedge prong 14 and 12 bifurcated 13 and 18 move radially and to promote moving axially of left and right sides wedge movable block 9, on the perspective plane perpendicular to driving shaft 10 or feed spool 1, left and right sides eccentric wheel 7 is according to the symmetrical setting of central point of driving shaft 10 or feed spool 1, the eccentric moving direction of left and right sides eccentric wheel 7 is opposite like this, that is to say, left and right sides wedge prong 14 and 12 bifurcated 13 and 18 move radially opposite direction, the movement of supposing the bifurcated 13 of left wedge prong 14 can push away the pusher dog 22(of left wedge movable block 9 conflict left clutches 25 in Fig. 3, bifurcated 13 moves up, left wedge movable block 9 is moved to the left), so that pusher dog 22 rotates, the pusher dog 22 that rotates is pushing away the wide place that roller 6 enters receiving space, then left clutch 25 be in from state, this moment right wedge prong 12 bifurcated 18 movement so that right wedge movable block 9 under the elastic-restoring force effect of the second elastic component away from the pusher dog 22(of right clutch 25 in Fig. 3, bifurcated 18 moves down, right wedge movable block 9 moves right), the pusher dog 22 of right clutch 25 roller 6 of can't conflicting then, roller 6 enters the narrow place of receiving space under the elastic-restoring force effect of the first elastic component, this moment, right clutch 25 was in the state that closes.Discussion based on top that is to say, left clutch 25 be in from state the time, right clutch 25 is in the state that closes, on the contrary, can draw equally, when left clutch 25 is in the state that closes, right clutch 25 be in from state.Left and right sides wedge prong 14 and 12 with respect to the rightabout eccentric setting of driving shaft 10 and left and right sides wedge prong 14 and 12 and the surface label of the reverse inclination direction of left and right sides wedge movable block 9 touch so that left and right sides clutch 25 from being in all the time opposite state with closing.In addition, for so that the bifurcated 13 of left and right sides wedge prong 14 and 12 and 18 can stably promote left and right sides wedge movable block 9 moves, fixed cover is provided with retainer ring 16 on the feed spool 1, retainer ring 16 is between the bifurcated 13 and 18 of left and right sides wedge prong 14 and 12, left and right sides wedge prong 14 and 12 bifurcated 13 and 18 all are resisted against on the radial surface of retainer ring 16, as shown in Figure 3, left and right sides wedge prong 14 and 12 bifurcated 13 and 18 promote left and right sides wedge movable block 9 and move by being resisted against on the retainer ring 16, promote so stable.
The above mentions, one end of first connecting rod 19 and second connecting rod 19 respectively with pin on feeding crank 23 setting that rotates under feeding crank 21 and the pin, in Fig. 1 and 2, the other end of first connecting rod 19 and second connecting rod 19 respectively with left and right sides double rolling key clutch 25 in clutch inner core 2 setting that rotates, an end of first connecting rod 19 and second connecting rod 19 respectively with pin on the rotary centerline of feeding crank 23 under feeding crank 21 and the pin, the other end of first connecting rod 19 and second connecting rod 19 respectively with left and right sides double rolling key clutch 25 in the rotary centerline of clutch inner core 2, the axial line homogeneous phase of feed spool 1 be arranged in parallel.Moreover, on the perspective plane perpendicular to feed spool 1 axial line, the both sides that are rotationally connected the central point that a little lays respectively at feed spool 1 or clutch inner core 2 of first connecting rod 19 and second connecting rod 19 and left and right sides clutch inner core 2, and with this central spot on the same line.Like this, suppose that wobble crank axle 20 upwards swings, first connecting rod 19 and second connecting rod 19 move upward, the clutch inner core 2 that first connecting rod 19 drives in the left double rolling key clutch 25 rotates counterclockwise, because first connecting rod 19 and second connecting rod 19 a little differ 180 degree with being rotationally connected of left and right sides clutch inner core 2 on the perspective plane perpendicular to feed spool 1 axial line, therefore the clutch inner core 2 that second connecting rod 19 can drive in the right double rolling key clutch 25 clockwise rotates, simultaneously the bifurcated 13 of the left wedge prong 14 of rotary actuation of hypothesis driven axle 10 and left wedge movable block 9 cooperate so that left clutch 25 be in from state, this moment the bifurcated 18 of right wedge prong 12 and cooperating so that right clutch 25 is in the state that closes of right wedge movable block 9, therefore drive by second connecting rod 19, so that the clutch inner core 2 in the right double rolling key clutch 25 clockwise rotates together with shell 4 and feed spool 1, and the clutch inner core 2 in the left double rolling key clutch 25 is with respect to shell 4 idle running; In case wobble crank axle 20 is during to lower swing, interlock by first connecting rod 19 and second connecting rod 19, clutch inner core 2 in the left double rolling key clutch 25 clockwise rotates, clutch inner core 2 in the right double rolling key clutch 25 rotates counterclockwise, this moment left and right sides wedge prong 14 and 12 by eccentric motion so that left clutch 25 is in the state that closes, right clutch 25 be in from state, therefore the clutch inner core 2 in the left double rolling key clutch 25 clockwise rotates together with shell 4 and feed spool 1, like this, left and right sides wedge prong 14 and 12 with realized intermittently driving in turn left and right sides clutch 25 cooperating of left and right sides wedge movable block 9, thereby first connecting rod 19 and second connecting rod 19 are from the oscillating quantity of wobble crank axle 20, sectional type ground sees through left and right sides clutch 25 so that feed spool 1 produces intermittent directional rotating, realizes the continuous rotation feeding of feed spool 1.When depressing when backstitching crank base, the sequential that wobble crank axle 20 swings up and down is opposite, has realized rotating counterclockwise of feed spool 1, and the clockwise and counterclockwise rotation of feed spool 1 has namely realized just stitching and backstitching feeding, and feeding is stable.

Claims (5)

1. feeding driving device for sewing machine is characterized in that: comprise
The wobble crank axle that can swing up and down;
Feeding crank under feeding crank and the pin on the pin, on the described pin under feeding crank and the pin the equal fixed cover of feeding crank be located on the described wobble crank axle;
First connecting rod and second connecting rod, an end of described first connecting rod and second connecting rod respectively with described pin on the feeding crank setting that rotates under feeding crank and the pin;
Feed spool;
Left and right sides double rolling key clutch, the described double rolling key clutch in the left and right sides includes
Shell with round cavity, described shell fixed cover is located on the described feed spool, and the shaft centre line of described round cavity and the shaft centre line of described feed spool coincide;
Be arranged in the described round cavity and can be set in rotationally clutch inner core on the described feed spool, described clutch inner core has a plurality of along the spaced pellet of the circumferencial direction of described round cavity, and the adjacent side of two described pellets of arbitrary neighborhood forms the receiving space of outer narrow inner width all and between the circumferential cavity wall of described round cavity;
A plurality of pusher dogs, be provided with the pin that extends along the axial direction of described feed spool between two pellets of described arbitrary neighborhood, all can be arranged with rotationally two described pusher dogs arranged in a crossed manner on each described pin, an end of described a plurality of pusher dogs all stretches out the outside at described clutch inner core;
Can rollably be arranged on respectively in the described receiving space and can be respectively pushed away a plurality of rollers at the wide place that enters described receiving space of rolling by the other end of described a plurality of pusher dogs, the axial line of each described roller all extends along the axial direction of described feed spool;
A plurality of being arranged on can provide described roller elastic-restoring force between described pellet and the described roller so that this roller enters first elastic component at the narrow place of described receiving space;
Pusher dog in the double rolling key clutch of the described left and right sides is oppositely arranged, the other end of described first connecting rod and second connecting rod respectively with described left and right sides double rolling key clutch in the setting that rotates of clutch inner core, on the perspective plane perpendicular to described feed spool axial line, the both sides that are rotationally connected the central point that a little lays respectively at described feed spool or described clutch inner core of the described clutch inner core in described first connecting rod and second connecting rod and the left and right sides, and with this central spot on the same line, when described roller enters the wide place of described receiving space, gapped between the circumferential cavity wall of described roller and described round cavity; When described roller entered the narrow place of described receiving space, described roller was clamped between the circumferential cavity wall of corresponding described pellet and described round cavity;
The driving shaft that can rotate;
Left and right sides wedge prong, described left and right sides wedge prong all is set on the described driving shaft prejudicially, and described left and right sides wedge prong is opposite with respect to the eccentric direction of described driving shaft;
Left and right sides wedge movable block, described left and right sides wedge movable block all can be set in along the axial direction of described feed spool on the described feed spool movably, between the pusher dog and the bifurcated of left described wedge prong of left described wedge movable block in the described double rolling key clutch in a left side, between the pusher dog and the bifurcated of right described wedge prong of right described wedge movable block in the described double rolling key clutch in the right side, described left and right sides wedge movable block all has and is enlarge gradually on away from the axial direction of corresponding described pusher dog tapered and can stretches out at the inconsistent outer surface of an end of described clutch inner core outside with corresponding described a plurality of pusher dogs, described left and right sides wedge movable block is inconsistent with the bifurcated of described left and right sides wedge prong respectively, at least one surface tilt ground arranges in the inconsistent surface of the bifurcated of described left and right sides wedge movable block and corresponding described wedge prong, and the inclined surface in the inconsistent surface of the bifurcated of described left wedge movable block and described left wedge prong, the incline direction of the inclined surface in described right wedge movable block and the inconsistent surface of the bifurcated of described right wedge prong is opposite;
Be arranged on the second elastic component that this wedge movable block elastic-restoring force can be provided between described clutch inner core and the described wedge movable block.
2. feeding driving device for sewing machine according to claim 1, it is characterized in that: fixed cover is provided with left and right sides eccentric wheel on the described driving shaft, described left and right sides eccentric wheel is through in the wedge prong of the described left and right sides by bearing respectively, the bifurcated of described left and right sides wedge prong roughly stretches out along the radial direction of described driving shaft, described driving shaft parallels setting with the axial line of described feed spool, on the perspective plane perpendicular to described driving shaft or described feed spool, described left and right sides eccentric wheel is according to the symmetrical setting of the central point of described driving shaft or described feed spool.
3. feeding driving device for sewing machine according to claim 1, it is characterized in that: fixed cover is provided with retainer ring on the described feed spool, described retainer ring is between the bifurcated of described left and right sides wedge prong, and the bifurcated of described left and right sides wedge prong all is resisted against on the radial surface of described retainer ring.
4. feeding driving device for sewing machine according to claim 1 is characterized in that: an end of described first connecting rod and second connecting rod respectively with described pin under feeding crank and the pin rotary centerline, described first connecting rod and the second connecting rod of feeding crank the other end respectively with described left and right sides double rolling key clutch in the rotary centerline, the axial line homogeneous phase of described feed spool of clutch inner core be arranged in parallel.
5. feeding driving device for sewing machine according to claim 1, it is characterized in that: the inconsistent surface of the bifurcated of described left wedge movable block and described left wedge prong all is obliquely installed in the same direction, the inconsistent surface of the bifurcated of described right wedge movable block and described right wedge prong also all is obliquely installed in the same direction, the symmetrical setting of incline direction of the inclined surface of the inclined surface of described left wedge movable block, described right wedge movable block.
CN 201110220958 2011-08-03 2011-08-03 Feeding driving device for sewing machine Active CN102337644B (en)

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CN102337644A CN102337644A (en) 2012-02-01
CN102337644B true CN102337644B (en) 2013-04-10

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Publication number Priority date Publication date Assignee Title
JP3115907B2 (en) * 1991-07-15 2000-12-11 株式会社鈴木製作所 Sewing machine drive mechanism
JP2829240B2 (en) * 1994-06-09 1998-11-25 ジューキ株式会社 Drive of sewing machine
AT404603B (en) * 1996-10-04 1999-01-25 Naehtechnik Sahl Ges M B H DRIVE DEVICE FOR INTERMITTENT CONVEYOR MOVEMENT
CN2357023Y (en) * 1998-06-29 2000-01-05 蔡荣枝 Driving structure for feeding mechanism of industrial sewing machine
CN202181430U (en) * 2011-08-03 2012-04-04 苏州日和缝制设备有限公司 Feeding driving device of sewing machine

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