CN101215764B

CN101215764B - Clutch structure of sewing machine

Info

Publication number: CN101215764B
Application number: CN2007101733048A
Authority: CN
Inventors: 陈光安
Original assignee: CHEESIANG SEWING MACHINE (SHANGHAI) Co Ltd
Current assignee: CHEESIANG SEWING MACHINE (SHANGHAI) Co Ltd
Priority date: 2007-12-27
Filing date: 2007-12-27
Publication date: 2011-05-04
Anticipated expiration: 2027-12-27
Also published as: CN101215764A

Abstract

The invention relates to a clutch structure of a seamer, which comprises a drive mechanism, a swing mechanism, two clutch groups and two connecting bars. The drive mechanism is provided with a lower shaft and a cam, and the cam is driven to rotate by the lower shaft, a pivoted arm is interlocked to lead an actuating ring to do intermittent movement in the left and the right directions, when the actuating ring is moved to the left side, each locating detent is pushed, and the locating detent is led to rotate to push each roller, and the roller is led to roll from a narrow position to a wide position, and a rotor and an outer shield ring are turned from an imminent state to a release condition, and the rotor and the outer shield ring are led to do relative rotating motion. At the same time, the roller and the outer shield ring are led to be mutually clamped because of friction by the rotor on the right side which is effected by the roller and a resilient, and at the same time, two connecting bars are respectively, mutually and moveably combined with connecting rod pins of the two clutch groups, and the lower shaft is led to do continuous rotating motion, and the connecting bars are led to do synchronous up-and-down motion, and the motions are used to intermittently drive a feed shaft to do co-intermittent rotating motion in turn, and the invention is lead to rotate to feed. In addition, the time sequences of the two connecting bras are changed relative to the lower shaft, the invention can feed in the opposite direction.

Description

The clutch configuration of Sewing machines

Technical field

The present invention relates to a kind of clutch configuration of Sewing machines, relate in particular to a kind of clutch configuration that is applicable to the Sewing machines of hypsicephalic roller type Sewing machines feeding driving device.

Background technology

China's Taiwan utility model patent certificate number is counted the clutch of the Sewing machines feeding driving device of M313685, comprises that mainly members such as clutch discs, an outer clutch discs and a linkage are formed in a frictional disk, the drive unit; Wherein: frictional disk, the dorsal part of disk body is provided with an axle sleeve, on axle sleeve, offer the caulking groove that subtend is provided with, the Pan Yuanchu of disk body in the inboard is provided with first rubbing surface and second rubbing surface, on first rubbing surface and second rubbing surface, be coated with one deck friction media, this first rubbing surface is vertical in the form of a ring to be arranged at outer Pan Yuanchu, second rubbing surface then adjoining within first rubbing surface ring footpath be provided with; Drive unit, be one to make frictional disk the rotatory force interlock can be passed to the connecting device of feed spool, comprise that an axle, two fastens projection, a compression spring, is adjusted assemblies such as a nut and a hold-doun nut and constituted, this axle is the axis body of a hollow form, in the central siphon end then car be shaped on external screw thread, make axle be provided with lockhole and the screw that connects axle, make axle lock lockhole with set screw and obtain and be positioned on the feed spool in the pipe shaft chosen place; Interior clutch discs, form a ring-type rubbing surface in the Pan Yuanchu of disk body one side, make this rubbing surface corresponding adaptive mutually with second rubbing surface, be provided with a locking holes in the rim appropriate location of disk body and link for the pull bar of swing mechanism, in the order clutch discs be able to the baffle ring of back bracket ring cooperation axle and axial location in feed spool; Outer clutch discs, it is the suitable disk body of one and first rubbing surface, make the vertical ring-type rubbing surface that is provided with in disk body inner disc edge place, and the wall at the disk body back side offers a plurality of open-works and a locking holes, locking holes links for another pull bar of swing mechanism, forms a jack-post in the center of disk body and articulates priming for linkage; Linkage is to utilize Sewing machines lower shaft power to produce toward the mechanism of covering motion, makes its effect end and the jack-post of outer clutch discs articulate priming mutually; Utilize above-mentioned member, the interior clutch discs of order gives clamping with axle and back bracket ring and is positioned on the feed spool, make frictional disk, the compression spring, adjust nut and hold-doun nut and successively be set in axle in regular turn, make second rubbing surface and the interior clutch discs of frictional disk touch, adjustment nut and hold-doun nut screw lock are supported to the compression spring, order compression spring produces compress energy storage and acts on to frictional disk, make outer clutch discs movable axis be located at feed spool and cover cap in the interior clutch discs outside, first rubbing surface of its rubbing surface and frictional disk is touched, like this, just make two pull bars from passing amount that swing mechanism transmitted, sectional formula ground sees through outer clutch discs and reaches interior clutch discs and be passed to frictional disk, make feed spool can produce intermittent directed the rotation, make feed spool reach the feeding effect.

Though can produce intermittent directed the rotation yet the clutch of above-mentioned Sewing machines feeding driving device has the feed spool of order, make feed spool reach the effect of feeding, but whole assembly is very complicated comparatively, structure is firm inadequately, use and innovate research and development based on actual, the inventor pursues and keeps on improving.

Summary of the invention

The clutch configuration that the purpose of this invention is to provide a kind of Sewing machines by the Combination Design of a transmission mechanism, a swing mechanism, two clutch groups and two connecting rods, firm combination to be provided and to improve effects such as rotating feeding, increases whole practicality and convenience.

The object of the present invention is achieved like this:

The clutch configuration of Sewing machines of the present invention includes a transmission mechanism, a swing mechanism, two clutch groups and two connecting rods.This transmission mechanism is provided with a lower shaft and a cam, and this lower shaft wears the axle center that is incorporated into this cam, and this cam is provided with the guide groove of arc Qu Bianhua; One swing mechanism, this swing mechanism is provided with a swing arm, one promotes ring, one feed spool, one roller, an one movable supporting axle and a bearing, this swing arm axially promotes ring in conjunction with this in swing, this promotion ring wears for this feed spool, and the inwall of this promotion ring also can be equipped with at least one locating ring, this at least one locating ring is fixedly arranged on the axial wall of feed spool, this roller is incorporated into an end of this swing arm, and this pair of rollers should be located in the guide groove of this cam, this movable supporting axle can be adopted mechanism's aspect of bent axle to link swing arm and bearing, make the movable axis hole that is arranged in swing arm of an end of bent axle, the other end of bent axle then activity is arranged in this bearing; This two clutches group is incorporated on the axial wall of this feed spool, and the corresponding activity of this two clutches group is resisted against the promotion ring both sides of this swing mechanism, this clutch group is provided with an outer back-up ring, one rotor, a plurality of elastic components, a plurality of rollers, a plurality of locating detents, one cover plate and a link pin, should be fixedly arranged on this feed spool by outer back-up ring, this rotor is arranged in this feed spool, and be located at this outer back-up ring inside, this rotor forms a plurality of extension blocks, the opposite side of each extension block forms the arc sections of outer narrow inner width, this arc sections is provided with elastic component, the adjacent side of this elastic component is provided with this roller, and be provided with a pin between each extension block, the activity of going up of each pin is equipped with two locating detents, and this rotor is in conjunction with this cover plate, and these cover plate central authorities are provided with a perforate, for each locating detent passes with promote ring mutually against, and this cover plate one side is provided with a perforation, is locked in the extension block of this rotor for this link pin wears; This two connecting rod respectively with mutual movable combination of the link pin of this two clutches group, for intermittently driving this two clutches group in turn, and then feed spool is done in the same way intermittently rotatablely move, be beneficial to rotate feeding.Thus, so that firm combination and convenient rotation feeding to be provided, increase whole practicality and convenience.

The present invention makes it compared with prior art owing to adopted above-mentioned technical scheme, has following advantage and good effect: because the present invention adopts said structure, so simplified the structure of this arrangement of clutch, the convenience that has improved its stability and used.

Description of drawings

To embodiments of the invention and in conjunction with the description of its accompanying drawing, can further understand purpose of the present invention, specific structural features and advantage by following.Wherein, accompanying drawing is:

Fig. 1 is the stereo appearance figure of the embodiment of the invention.

Fig. 2 is the three-dimensional assembly exploded view of the embodiment of the invention.

Fig. 3 is that the side of the embodiment of the invention is seen figure.

Fig. 4 is the generalized section of the embodiment of the invention.

Fig. 5 combines schematic diagram for the rotor of embodiment of the invention clutch group with the section that outer back-up ring is in urgent state.

Fig. 6 combines schematic diagram for the rotor of embodiment of the invention clutch group with the section that outer back-up ring is in release conditions.

Fig. 7 is the sectional view of the embodiment of the invention.

Fig. 8 is connecting rod operating state one schematic diagram of the embodiment of the invention.

Fig. 9 is connecting rod operating state two schematic diagrames of the embodiment of the invention.

The specific embodiment

As Fig. 1 to Fig. 7, the present invention is a kind of clutch configuration of Sewing machines, and the clutch configuration of this Sewing machines comprises:

One transmission mechanism 10, this transmission mechanism 10 are provided with a lower shaft 11 and a cam 12, and this lower shaft 11 wears the axle center that is incorporated into this cam 12, and this cam 12 is provided with the guide groove 121 of arc Qu Bianhua.

One swing mechanism 20, this swing mechanism 20 is provided with a swing arm 21, one promotes ring 22, one feed spool 23, one roller 25, an one movable supporting axle 26 and a bearing 27, this swing arm 21 axially promotes ring 22 (wherein in conjunction with this in swing, this swing arm 21 is axially arranged with two axially extending bores 213 and two screws 214 in swing, and this promotion ring 22 is respectively equipped with a teat 221 up and down, be provided with perforation 222 in this teat 221, wear this two axially extending bore 213 and two perforation 222 respectively for two pins 215, and with two spiral shell spares 216 respectively spiral shell be located at this two screw 214, the head of two spiral shell spares 216 can locally hide through hole 213, in case shotpin 215 drops, and then promote ring 22 in conjunction with this.This promotion ring 22 wears for this feed spool 23, and the inwall of this promotion ring 22 also can be equipped with at least one locating ring 24, this at least one locating ring 24 is fixedly arranged on the axial wall of this feed spool 23, be used to prevent part left and right sidesing shiftings such as rotor 32 and roller 34, the end that this roller 25 is incorporated into this swing arm 21 (wherein, an end of this swing arm 21 is provided with a pin 211, for in conjunction with this roller 25), and these roller 25 correspondences are located in the guide groove 121 of this cam 12, and the other end of this swing arm 21 forms an axis hole 212, mechanism's aspect that the movable supporting axle 26 of this binding swing arm 21 and bearing 27 can be adopted bent axle, make the movable axis hole 212 that is arranged in swing arm 21 of an end of bent axle, the other end of bent axle then activity is arranged in this bearing 27 (when this movable supporting axle 26 is adopted purpose being set swinging for absorbing swing arm 21 of bent axle, the variable quantity of feed spool 23 and axis hole 212 centre-to-centre spacing).

Two clutch groups 30, this two clutches group 30 is incorporated on the axial wall of this feed spool 23, and the promotion that these two clutches group, 30 corresponding activities are resisted against this swing mechanism 20 encircles 22 both sides, this clutch group 30 is provided with an outer back-up ring 31, one rotor 32, a plurality of elastic components 33, a plurality of rollers 34, a plurality of locating detents 35, one cover plate 36 and a link pin 37, should be fixedly arranged on this feed spool 23 by outer back-up ring 31, this rotor 32 is arranged in this feed spool 23, and be located at this outer back-up ring 31 inside, this rotor 32 forms a plurality of extension blocks 321, the opposite side of each extension block 321 forms the arc sections 322 of outer narrow inner width, this arc sections 322 is provided with groove 324, for this elastic component 33 being set (wherein, this elastic component 33 can be spring or other elastic parts), these elastic component 33 adjacent sides are provided with roller 34, sell 323 and be provided with one between each extension block 321, the movable two anti-phase each other locating detents 35 that are equipped with on each pin 323, move to wide place in order to the roller 34 that promotes suppressed between outer back-up ring 31 and rotor 32 walls by elastic component 33 by narrow place, and this rotor 32 is in conjunction with this cover plate 36, these cover plate 36 central authorities are provided with a perforate 361, for each locating detent 35 passes with promote ring 22 mutually against (wherein, this promotes ring 22 both sides and forms arc sections 223, for each locating detent 35 with promote ring 22 mutually against), and these cover plate 36 1 sides are provided with a perforation 362, are locked in the extension block 321 of this rotor 32 for this link pin 37 wears.

Two connecting rods 40, these two connecting rods, 40 upper ends are linked to not shown swing arm, and (this swing arm drivening rod 40 moves up and down, and the swing circle of the action cycle of this swing arm and lower shaft 11 is synchronous), these two connecting rods, 40 lower ends combine (wherein with the link pin 37 of this two clutches group 30 is movable mutually respectively, this two connecting rod 40 respectively with the link pin 37 mutual movable bound fractions of this two clutches group 30, wear the link pin 37 of this two clutches group 30 respectively with this two connecting rod 40, these link pin 37 outsides are provided with a groove 371, and detain the groove 371 of 38 snap closes in link pin 37 outsides with a C shape), for intermittently driving this two clutches group 30 in turn, and then rotatablely move intermittence to make feed spool 23 do in the same way, so that rotate feeding.

The characteristics of foregoing invention are by a transmission mechanism 10, one swing mechanism 20, the Combination Design of two clutch groups 30 and two connecting rods 40, and drive cam 12 rotations with lower shaft 11, and be located in the guide groove 121 of set arc Qu Bianhua on this cam 12 by roller 25 correspondences on swing arm 21 1 ends of this swing mechanism 20, make swing arm 21 be made promotion ring 22 intermittences of doing left and right directions move by interlock, when promotion ring 22 moves on to the left side, promote each locating detent 35 earlier, and make each locating detent 35 turn, and then promote each roller 34 compression elastic piece 33 (being spring) again, make each roller 34 move to wide place by the narrow place that each extension block 321 1 side of rotor 32 are formed the arc sections 322 of outer narrow inner width, the rotor 32 that order is in urgent state originally is converted to release conditions with outer back-up ring 31, and then makes rotor 32 freely do relative rotary motion with outer back-up ring 31; The rotor 32 that is positioned at the right side this moment is then because of the effect of roller 34 with elastic component 33, and clamp mutually, can not do relative rotary motion), this two connecting rod 40 combine with the link pin 37 of this two clutches group 30 is movable mutually that (wherein, this two connecting rod 40 is done continuous rotation and reached move up and down synchronously (as Fig. 8, shown in Figure 9) respectively simultaneously again.For example: lower shaft 11 promotes ring 22 and moves to left during the 0-180 degree, and left side clutch group 30 discharges, 30 lockings of right side clutch group, and connecting rod 40 is down; And lower shaft 11 promotes ring 22 to move to right during the 180-360 degree, and right side clutch group 30 discharges, 30 lockings of left side clutch group, connecting rod 40 up can be done the feeding of advancing), for intermittently driving this two clutches group 30 in turn, and then feed spool 23 is done in the same way intermittently rotatablely move, so that rotate feeding.In addition, when depressing (not shown) when backstitching bar, the sequential changeabout of two connecting rods 40: lower shaft 11 is during the 0-180 degree, and connecting rod 40 up; Lower shaft 11 is during the 180-360 degree, and connecting rod 40 down can do retreating feeding.

Though the present invention is illustrated hereinbefore according to preferred embodiment of the present invention, this does not represent that scope of the present invention is confined to above-mentioned structure, if by structure that claim of the present invention covered all within protection domain.Those skilled in the art can be developed the equivalent substitution structure that at an easy rate after reading above-mentioned explanation, and these equivalent alternative structure also are within the scope that this case requires.

Claims

1. the clutch configuration of a Sewing machines is characterized in that, comprising:

One transmission mechanism, this transmission mechanism are provided with a lower shaft and a cam, and described lower shaft wears the axle center that is incorporated into described cam, and described cam is provided with the guide groove of arc Qu Bianhua;

One swing mechanism, this swing mechanism is provided with a swing arm, and promotes ring, a feed spool, a roller, a movable supporting axle and a bearing, described swing arm in the swing axially in conjunction with described promotion ring, described promotion ring wears for described feed spool, described roller is incorporated into an end of described swing arm, described pair of rollers should be located in the guide groove of described cam, and described movable supporting axle links above-mentioned swing arm and bearing;

Two clutch groups, this two clutches group is incorporated on the axial wall of above-mentioned feed spool, and the corresponding activity of this two clutches group is resisted against the promotion ring both sides of described swing mechanism, described clutch group is provided with an outer back-up ring, one rotor, a plurality of elastic components, a plurality of rollers, a plural number locating detent, one cover plate and a link pin, described outer back-up ring is fixedly arranged on described feed spool, described rotor is arranged in described feed spool, and be located at described outer back-up ring inside, described rotor forms a plurality of extension blocks, the opposite side of each extension block forms the arc sections of outer narrow inner width, described arc sections is provided with elastic component, the adjacent side of described elastic component is provided with described roller, and is provided with a pin between each extension block, and the activity of going up of each pin is equipped with two locating detents, to contact this promotion ring, and described rotor is in conjunction with described cover plate, and these cover plate central authorities are provided with a perforate, for each locating detent passes with described promotion ring mutually against, and described cover plate one side is provided with a perforation, is locked in the extension block of this rotor for described link pin wears; And

Two connecting rods, this two connecting rod respectively with mutual movable combination of the link pin of above-mentioned two clutch groups, for intermittently driving this two clutches group in turn, and then feed spool is done in the same way intermittently rotatablely move.

2. the clutch configuration of Sewing machines as claimed in claim 1, it is characterized in that: described swing arm is in the two axial through hole and two screws that are axially arranged with of swing, and described promotion ring is respectively equipped with a teat up and down, be provided with perforation in this teat, wear described two axial through hole and two perforation respectively for two pins, and with two spiral shell spares respectively spiral shell be located at described two screws, for being positioned each teat, and then in conjunction with described promotion ring.

3. the clutch configuration of Sewing machines as claimed in claim 1, it is characterized in that: an end of described swing arm is provided with a pin, in conjunction with described roller.

4. the clutch configuration of Sewing machines as claimed in claim 1, it is characterized in that: the other end of described swing arm forms an axis hole, wears an end of described movable supporting axle for activity.

5. the clutch configuration of Sewing machines as claimed in claim 1, it is characterized in that: described arc sections is provided with groove, for described elastic component is set.

6. the clutch configuration of Sewing machines as claimed in claim 1, it is characterized in that: described two connecting rods respectively with the mutual movable bound fraction of the link pin of described two clutch groups, wear the link pin of this two clutches group respectively with this two connecting rod, the described link pin outside is provided with a groove, and is buckled in the groove in the link pin outside with a C shape padlock.

7. the clutch configuration of Sewing machines as claimed in claim 1, it is characterized in that: the inwall of described promotion ring can be equipped with at least one locating ring, and this locating ring is fixedly arranged on the axial wall of described feed spool.

8. the clutch configuration of Sewing machines as claimed in claim 1, it is characterized in that: can adopt bent axle between described swing arm and the bearing is the movable supporting axle, make the movable axis hole that is arranged in swing arm of an end of bent axle, the other end of bent axle then activity is arranged in the described bearing.