CN1103392C - Needle bar stroke adjust device of sewing machine - Google Patents
Needle bar stroke adjust device of sewing machine Download PDFInfo
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- CN1103392C CN1103392C CN 99100714 CN99100714A CN1103392C CN 1103392 C CN1103392 C CN 1103392C CN 99100714 CN99100714 CN 99100714 CN 99100714 A CN99100714 A CN 99100714A CN 1103392 C CN1103392 C CN 1103392C
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- locating ring
- needle bar
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- 238000009958 sewing Methods 0.000 title claims abstract description 37
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000005755 formation reaction Methods 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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Abstract
A kind of needle bar stroke adjusting apparatus of a sewing machine comprises the following components: an eccentric pin united one end of a connection rod and a crank rotating with the upper axis of sewing machine as a whole and pivoted with the central portion of needle bar moving with the needle; and, making the end of connection rod eccentric to the engagement portion of the crank; and, configuring a locating ring surrounding the eccentric pin upon the engagement portion on the crank side coaxial with the eccentric pin, and configuring a locking device opposing to the end face of the locating ring and the crank. The invention employs the locking position of the locking device to position the engagement portion at the side of crank shaft of the eccentric pin in the circumferential direction such that it can easily and securely adjust the stroke of needle bar for moving up and down.
Description
The invention relates to the pin device of the dynamic stroke up and down of moving shank up and down together of adjusting and be contained in its lower end.
The pin of Sewing machines is installed on from the bottom that extends the shank that hangs down in the leading section of the horn on the top of sewing machine table via needle lock, along with being lowered to the needle downing position be located on the sewing machine table and its, this shank that produces in the inside of horn moving up and down utilize wire loop device (Looper) to form the action of making the cloth of supplying with this needle downing position relatively in the internal actions of sewing machine table.
Figure 1A, 1B are the action specification figure in the actuation mechanism up and down of the shank of the inside of horn formation.Shank 12 places of axial length direction by horn A on lower support, moving up and down through free sliding in these support portions.Again, the transmission of the motor of sewing machine that horn A inside upper part configuration using does not show on from figure to the direction of arrow B rotate on axle S, but between support portion up and down and the middle part of shank 1 in opposite directions on before the axle S end crank 2 is mounted to unitary rotation.
Shank 1 shank clamper 10 is installed on than with on position below the opposing part held before the S of axle, this shank 1 will be by the upper end axle Zhi Yu of the connecting rod 3 of 10 of a straight bar holders bottom at the prominent crank-pin of establishing 20 of the end face of this crank 2, and links via this crank 2 and last axle S.Crank-pin 20 is based in from the axle center of going up axle S of the center of rotation that becomes crank 2 only eccentric designated length, and (when crank 2 rotates along with the rotation of last axle S, rotate along the circumference of the radius that is equivalent to this off-centre length L=L) position.In addition, at Figure 1A, 1B, for the ease of diagram, the axle center of last axle S is partial to a side of shank 1 and represents, but the actual axle center of going up axle S makes consistent with the axle center of shank 1 at front view.
And, move along the rotary motion trace of this crank-pin 20 upper end of the connecting rod 3 that links with crank-pin 20, the shank 1 that links via the bottom of shank clamper 10 and connecting rod 3 becomes between the lower position shown in the upper limit position shown in Figure 1A and Figure 1B moving up and down under the restriction of horn A.
In addition, establish tossing about of position the crank-pin 20 of this crank 2 prominent, integrally formed weight be equivalent to comprise connecting rod 3 and and the counterpoise of the moving part of the shank 1 that links of its lower end, make the dynamic equilibrium of the rotation of following crank 2 keep good.Again, utilize the guiding device that does not show on the figure to guide, prevent to follow the component beyond the above-below direction of rotation of crank 2 to act on shank 1, make the moving up and down high speed that can adapt to shank 1 at above-below direction by the bottom of the connecting rods 3 of 10 of shank clampers.
The dynamic stroke up and down of the pin that takes place about following the moving up and down of shank 1 is especially requiring the industrial sewing machines of high quality of sewing, is the important design object that should suitably set according to sewing conditions such as the thickness that becomes the cloth of making object, kinds.
At the Sewing machines of actuation mechanism up and down that has shown in above-mentioned Figure 1A, the 1B, shank 1 and pin are because of moving up and down to be equivalent at 2 times stroke of the eccentric length L of the crank-pin 20 of the end face of crank 2, through prominent several cranks 2 of establishing the position of preparing to change crank-pin 20, in the assembling stage of Sewing machines, according to the selected crank 2 of each sewing condition with suitable eccentric length L, constitute actuation mechanism up and down with it, obtain suitable dynamic stroke up and down.
; at this Sewing machines; because of having changed the situation of sewing condition between its operating period; need to change this crank 2; and this crank 2 is shown in Figure 1A, 1B; in the blank part of machine wall A front end, be equipped on the rear side of needle bar 1, in this blank part, set other a lot of mechanism elements such as elevating mechanism of the casting die that is pressed in the tailoring cloth on the sewing machine table again, have this crank 2 of replacing to need a lot of manpowers and the problem of time.
In order to deal with this problem, at the public clear 63-57078 communique of spy (Japanese PatentPublication (Examined) No.63-57078 (1988)) device that can adjust the dynamic stroke up and down of shank is within the limits prescribed disclosed.Fig. 2 A, 2B are the sectional side views that amplifies the major part of this device of expression.This device as shown in Figure 2 makes the cam pin 4 of the fitting portion 4b mutually eccentric (eccentric length δ) of the fitting portion 4a of crank 2 sides and connecting rod 3 sides link and go up the crank 2 that axle S rotates together and the upper end of connecting rod 3 in textural use.
To comprise for number place's planarizations of the both sides of the eccentric direction of the opposing party's fitting portion 4b and formed tabular surface 40,40 at the fitting portion 4a ' of cam pin 4 ... this fitting portion 4a ' through be embedded in respect to the axle center of last axle S only eccentric the position of designated length L run through the embedded hole of formation, and the front end of fixed screw 41,41 that will be screwed into the middle part of this embedded hole from the outside is pushed down this tabular surface 40,40 ... one of, be fixed into and can't rotate in circumferential locations with these tabular surface 40 correspondences.
The fitting portion 4a that Fig. 2 A represents these crank 2 sides is through the fixing state of the tabular surface that forms at the eccentric direction homonymy with the opposing party's fitting portion 4b 40.At this state, the shank (not showing on the figure) that when crank 2 rotates along with the rotation of last axle S and the lower end of connecting rod 3 links is with 2 times of the eccentric length δ sum of the eccentric length L of crank 2 and cam pin 4, and promptly the stroke of 2 (L+ δ) is moving up and down.
The fitting portion 4a that Fig. 2 B represents these crank 2 sides through with the eccentric direction of the opposing party's the fitting portion 4b fixing state of the tabular surface that forms 40 of tossing about.At this state, the needle bar (not showing on the figure) that when crank 2 rotates along with the rotation of last axle S and the lower end of connecting rod 3 links is with 2 times of the difference of the eccentric length δ of the eccentric length L of crank 2 and cam pin 4, and promptly the stroke of 2 (L-δ) is moving up and down.
So, through fixing after the circumferential locations of the fitting portion 4a that suitably changes crank 2 sides, can and the fitting portion 4b of connecting rod 3 sides between adjust the dynamic stroke up and down of shank in 4 times the length range of the eccentric length δ that sets, can change the change that crank 2 ground adapt to sewing condition.
; the shank stroke regulator that constitutes shown in as mentioned above; this tabular surface 40,40 of adjustment benchmark because of the circumferential locations that becomes this fitting portion 4a ... be located at the inboard of the embedded hole of crank 2 formation; and the linking part that carries out the crank 2 this position adjusted and connecting rod 3 is shown in Figure 1A, 1B; inboard at horn A is the front side configuration with connecting rod 3; when this position is adjusted, have to be confirmed to be the problem that does not obtain desired circumferential locations.
Therefore, when adjusting the stroke of shank 1, have to according at first unclamping fixed screw 41,41, remove fitting portion 4a fixing for crank 2, with cam pin 4 from the front side of this linking part (at Fig. 2 A, the left side of 2B) operation cam pin 4, after adjusting the position of summary, screw 41 is locked, 41, tabular surface 40 application of forces of touching through front end and make rotation to these, realize the step adjustment of desired circumferencial direction, this moment resulting positioning accuracy and fixed screw 41,41 locking degree is relevant, the correct position of not only difficult adjustment, and lock inadequate situation at this, play or position deviations take place in cam pin 4 in adjusted running, possibly can't obtain desired dynamic stroke up and down.
Again, because this fixed screw 41,41 of locking is impaired by the tabular surface 40 that these front end is pushed down, get rusty in long-term the use, the action of the various motions that may form in the inboard of horn A the actuation mechanism up and down that comprises shank 1 causes fault.
The present invention puts in view of the above-mentioned problems and proposes, its purpose is to provide a kind of sewing machine needle bar stroke regulator, can be easily and positively adjust the position that links in order to the cam pin of the connecting rod of adjusting the shank stroke and crank, needn't worry to take place adjusted play and position deviation.
For achieving the above object, the present invention takes following technical scheme:
A kind of shank stroke regulator of Sewing machines is characterized in that comprising:
Connecting rod, its with the moving up and down together shank of pin among the way, an end is propped up by axle;
Axle is integral rotation on the crank, itself and Sewing machines;
Cam pin, the other end that it links this crank and this connecting rod makes and these fitting portion off-centre separately;
Locating ring, the fitting portion of the crank side of itself and this cam pin encircles coaxially to be established; And
Clamping close device, its opposing part at the end face of this locating ring and this crank constitutes, and both position whats engage with each other when giving fixed circumferential locations;
Nationality the circumferential locations in this clamping close device engaging, with the fitting portion of this crank axle side location, adjusts rotation along with axle this on via on this shank of this crank and connecting rod generation time dynamic stroke.
The shank stroke regulator of described Sewing machines is characterized in that: this locating ring and this cam pin are integral structure.
The shank stroke regulator of described Sewing machines, it is characterized in that: this clamping close device comprises:
Engaging protrusion is based in this crank end face; And
Slot forms breach and in the circumferential locations and the engaging of this engaging protrusion of this appointment in the periphery of this locating ring.
The shank stroke regulator of described Sewing machines is characterized in that: this slot is on the circumference of this locating ring and be provided with a plurality of.
The shank stroke regulator of described Sewing machines is characterized in that: the end face at this crank sets the formation pin, and constitutes this engaging protrusion.
The shank stroke regulator of described Sewing machines is characterized in that: this locating ring and this cam pin are integral structure.
Sewing machine needle bar stroke regulator of the present invention comprises: the moving up and down together end midway at shank of connecting rod and pin is propped up by axle; The axle of going up of crank and Sewing machines is integral rotation; Cam pin links the other end of this crank and this connecting rod and makes these and fitting portion off-centre separately; The fitting portion of the crank side of locating ring and this cam pin encircles coaxially and establishes; And clamping close device, constitute at the opposing part of the end face of this locating ring and this crank, engage with each other during the circumferential locations of both position what appointments; Wherein, nationality in the circumferential locations of this clamping close device engaging fitting portion location with this crank axle side, adjust along with the rotation of axle this on via dynamic stroke under on this shank of this crank and connecting rod generation.
In the present invention, the cam pin that links crank and connecting rod has the locating ring of establishing at the fitting portion ring of crank side, with this fitting portion and chimeric with last crank that is integral rotation, when the circumferential locations of both position what appointments, in the clamping close device engaging of the opposing part formation of the end face of this locating ring and crank, at circumferencial direction cam pin is located via this locating ring.
Again, this locating ring is characterised in that and this cam pin formation one.
In the present invention, nationality the clamping close device engaging of order in opposing part formations of the end face of locating ring and crank, has the cam pin that position skew ground restriction and this locating ring constitute one, maintenance thereby resultant shank stroke really at circumferencial direction.
Again, being characterised in that of this clamping close device comprises the engaging protrusion that is based in this crank end face and forms breach week and at the fixed circumferential locations of this holder and the slot of this engaging protrusion engaging outside this locating ring.
In the present invention, the prominent engaging protrusion of establishing this crank end face of what of mat work reaches the slot that the locating ring machining gap is formed in the position of the eccentric direction of corresponding what cam pin, is formed in the clamping close device of the certain engaging of circumferential locations of appointment simply.
Again, this slot is characterised in that on the circumference of this locating ring and establishes a plurality of.
In the present invention, through the slot that a plurality of locating rings are set, make these separately with the engaging of the engaging protrusion of crank side, will be in a plurality of circumferential locations to the fitting portion location of the cam pin of crank side, can be to adjust the shank stroke with each self-corresponding multistage.
In addition, this engaging protrusion is characterised in that end face at this crank sets pin and forms.
In the present invention, set the engaging protrusion that pin constitutes the end face of crank through end face at crank, easily form engaging protrusion in desired circumferential locations.
When the additional drawing of contrast is read following detailed description, the purpose of these inventions and new feature will be understood more up hill and dale.
Following with reference to accompanying drawing, describe embodiments of the invention in detail:
Figure 1A, 1B are the action specification figure of the actuation mechanism up and down of shank.
Fig. 2 A, 2B are the sectional side views of the major part of known shank stroke regulator.
Fig. 3 is the shank stereogram of the structure of actuation mechanism up and down that expression has a shank stroke regulator of the present invention.
Fig. 4 is the exploded perspective view of the major part of shank stroke regulator of the present invention.
Fig. 5 A, 5B are the sectional side views that amplifies the linking part of expression crank and connecting rod.
Fig. 6 is the exploded perspective view of other embodiment of expression shank stroke regulator of the present invention.
Inventive embodiment
Below, according to drawing detailed description the present invention of expression embodiment.Fig. 3 is the shank stereogram of the structure of actuation mechanism up and down that expression has a shank stroke regulator of the present invention.Fig. 4 is the exploded perspective view of its major part.
1 is shank among the figure, and this shank 1 is supported for the horn that does not show on figure leading section direction up and down is free to slide.10 of the shank clampers that the middle part of shank 1 is fixed in this position via interlocking prop up in the bottom of connecting rod 3, via needle lock 11 pins 12,12,12 are installed in the bottom of the shank 1 that hangs down below horn.
The axle branch of shank clamper 10 and connecting rod 3 is guide member 13 engagings that make and be fixed in the part of horn via guide block 14.Guide member 13 has the guide groove that extends at above-below direction, and this guide block 14 embeds along this guide groove in the inside of this guide groove, forms middle part with shank 1 and is directed to the effect that direction up and down is free to slide.
Again, the S among the figure be the inside upper part of the horn that do not show on the Zhi Yutu and rotate around the axle center of level of approximation go up axle.The end that should go up axle S faces the first half of this shank 1, but in this end crank slot 2 is mounted to unitary rotation, and this crank slot 2 links via the upper end of cam pin 4 described later and this connecting rod 3.
Crank 2 has at a chimeric side direction radial direction lateral process of having fixed on this shaft sleeve part of axle S and establishes short crank arm 21 and the half-round hole enlargement and the integrally formed counterpoise 22 of the opposite side of this shaft sleeve part formed as shown in Figure 4.This counterpoise 22 have be equivalent to comprise connecting rod 3 and and the weight of the moving part of the shank 1 that links of its lower end, have the effect that the rotation of following crank 2 keeps dynamic equilibrium, be needed in order to be implemented in stable rotation at a high speed.
At the leading section of the crank arm 21 that is based in crank 2, the position of axle S specific length is run through formation and is somebody's turn to do the parallel embedded hole 23 of axle S on distance is somebody's turn to do.That utilizes around this embedded hole 23 that the open slot setting reach total length separates with the axle sleeve side clasps carriage 24, wear the set bolt 25 of the bolt hole of central authorities approximately that this clasps carriage 24 through tightly inserting at the axle sleeve side chain, dwindle the internal diameter of this embedded hole 23, clasp the fitting portion 4a of the cam pin 4 that is embedded in this embedded hole 23 as described later from the outside and make and to be fixed into and to rotate.
Again, at the periphery of this embedded hole 23 of the end face opening of crank 2, in the prominent engaging protrusion 5 that is configured to feature of the present invention in a place of circumferencial direction.Engaging protrusion 5 shown in Figure 4 through link this embedded hole 23 and on set thin warp on the line in axle center in two holes between the installing hole of axle S pin constitute.In addition, engaging protrusion 5 prominent established the appropriate location that this periphery can be located in the position, and engaging protrusion 5 constitutes and also can through setting proper method beyond this pin again.
The cam pin 4 of upper end that links connecting rods 3 at the crank 2 of above-mentioned structure the same with in conventional devices shown in Fig. 2 A, the 2B, be connected with the fitting portion 4b of connecting rod 3 sides that has the off-centre of eccentric length δ (with reference to Fig. 5 A, 5B) with respect to this fitting portion 4a in the side of textural fitting portion 4a in crank 2 sides, also between this fitting portion 4a and fitting portion 4b, have locating ring 6 in the present invention.
This locating ring 6 is to become to encircle the thin annular ring of establishing coaxially at the fitting portion 4a of crank 2 sides, in its periphery, be arranged on its periphery forms rectangular indentation with Rack slot 6a, 6b in both sides for the eccentric direction of the fitting portion 46 of connecting rod 3 sides of this fitting portion 4a.In addition, this locating ring 6 preferably utilizes from the cutting of common material and this fitting portion 4a one and constitutes, and is fixed into and the additive method formation such as can't rotates but also can utilize ring with settings in addition to be pressed into this fitting portion 4a Hou.
The cam pin 4 of formation after this manner, mat work at the embedded hole 23 of crank 2 formation and the bolts 25 that is locked, utilize a side the embedded what of fitting portion 4a to clasp carriage 24 and be fixed into from the outside and clasp.At this moment, the periphery of the locating ring of establishing at this fitting portion 4a ring 6 and the embedded hole 23 of crank 2 in opposite directions, but in this part in opposite directions, as noted above, form slot 6a, 6b in locating ring 6 sides, dash forward at the periphery of the embedded hole 23 of crank 2 sides and establish engaging protrusion 5.Therefore, the fitting portion 4a of cam pin 4 integrates this slot 6a, one of 66 and this engaging protrusion 5 at circumferencial direction, can easily locate both circumferential locations of engaging of what.A fitting portion 4a side positioning states therein fixes.
Utilize this fixed form and make cam pin 4 and crank 2 integrated, and the opposing party's fitting portion 4b from the end face near normal of crank 2 dash forward and establish.At this fitting portion 4b, the connecting axial sleeve 30 of establishing end on the what connecting rod 3 is chimeric via bearing 31 as shown in Figure 4, its both sides installation of retainer ring 32 clampings that utilizes this locating ring 6 and be fixed in the end face of fitting portion 4b with screw.Utilize this installation, rotate along the circumference that with the eccentric length that what is become the axle center of axle S on its center of rotation is radius with rotation and this fitting portion 4b of work crank 2 end on the connecting rod 3.The end is as noted above under the connecting rod 3, under the restriction of the shank clamper 10 that utilizes guide member 13 and shank 1 link, this shank 1 is moving up and down with the stroke of the eccentric length of this fitting portion 4b of the upper end that is equivalent to have linked connecting rod 3.
The dynamic stroke up and down of the shank 1 of Fa Shenging can carry out 2 kinds of adjustment through the fixing of this fitting portion 4a that the engaging of slot 6a, the 6b of the engaging protrusion 5 of utilizing crank 2 sides and locating ring 6 sides obtains separately after this manner.
Fig. 5 A, 5B are the sectional side views that amplifies the linking part of expression crank 2 and connecting rod 3.
Slot 6a, the 6b of locating ring 6 peripheries are as noted above, are located at for the eccentric side of the fitting portion 4b of connecting rod 3 sides of the fitting portion 4a of crank 2 sides separately and toss about.Fig. 5 A represents the slot 6a of this eccentric side and the state of engaging protrusion 5 engagings.This moment is with respect to the off-centre of the fitting portion 4b of fitting portion 4a and the eccentric direction of crank 2, become the eccentric length L of the embedded hole 23 of having fixed fitting portion 4a and with respect to poor (=L-the δ) of the eccentric length δ of the fitting portion 4b of fitting portion 4a with respect to the eccentric length of the fitting portion 4b of the center of rotation of this crank 2, along with crank 2 rotates, shank 1 is moving up and down with stroke 2 (L-δ).
Fig. 5 B represent to be located at and with respect to the eccentric direction of the fitting portion 4b of fitting portion 4a toss about slot 6b and the state of engaging protrusion 5 engagings.This moment with respect to the off-centre of the off-centre of the fitting portion 4b of fitting portion 4a and crank 2 in the same way, become the eccentric length L of the embedded hole 23 of having fixed fitting portion 4a and with respect to the eccentric length δ sum (=L+ δ) of the fitting portion 4b of fitting portion 4a with respect to the eccentric length of the fitting portion 4b of the center of rotation of this crank 2, along with crank 2 rotates, shank 1 is moving up and down with stroke 2 (L+ δ).
As noted above, at shank stroke regulator of the present invention, the same with conventional devices shown in Figure 6, fitting portion 4a through fixed crank 2 sides after the change circumferential locations, realize above-mentioned 2 kinds of shank strokes, be that separately circumferential locations is with known different, cause is through the slot 6a that forms at locating ring 6, the engaging of the 6b and the engaging protrusion 5 of the end face that is based in crank 2 realizes, through cam pin 4 is rotated and the alter operation of this circumferential locations of implementing from the face side of connecting rod 3, really obtain desired circumferential locations, through lock this set bolt 25 at this state, can be easily and realize above-mentioned 2 kinds of shank strokes accurately.
Again, this fitting portion 4a utilizes the bolt 25 that is locked fixing really because of clasp the fixing from clasping of the outside of carriage 24 through utilization, needn't worry to take place the play or the position deviation of cam pin 4, can stably obtain desired dynamic stroke up and down.Again, utilizing this to clasp fixing fitting portion 4a, can not take place local injury and thereby getting rusty of causing, needn't worry that the action of the various interlinked mechanisms that constitute in the inboard at horn A of the actuation mechanism up and down that comprises shank 1 causes obstacle.
In addition, at above embodiment, the structure that is provided with the 2 slot 6a of place, 6b in the periphery of locating ring 6 has been described, but through structure at these slots 6a, 6b, but, can carry out the more stroke adjustment of multistage through between these slots 6a, 6b, many slots being set and making these engage with engaging protrusion 5 separately with proper spacing.
At above embodiment, on clamping close device, the structure of the engaging protrusion 5 with slot 6a, the 6b that is located at locating ring 6 and the end face that is based in crank 2 has been described again, but also can have adopted the clamping close device of other structures in order to the location.
Fig. 6 is the exploded perspective view of other embodiment of the shank stroke regulator of the present invention of the clamping close device of expression with other structures.At Fig. 6, periphery at locating ring 6 is provided with slot 6a, 6b, and when assembling with the end face of locating ring 6 crank 2 in opposite directions, have the crank arm 21 of embedded hole 23 before the end be provided with and this slot 6a, 66 asks to join one wide slot 5a, utilize these to constitute clamping close device.
At this structure, the nationality work makes slot 6a, 66 a certain side and slot 5a integrate, and at the fixing fitting portion 4a of this state, carries out the stroke adjustment.Slot 6a or 6b and slot 5a nationality before the crank arm 21 that can see over from connecting rod 3 sides the end and were made and roughly integrate Hou this moment, integrate the position at this and insert suitable anchor clamps order and slot 6a or 6b, slot 5a engaging, can make high accuracy integrate, easily realize certain position adjustment.
As noted above, shank stroke regulator at the present invention's Sewing machines, because of textural linking and on the axle unitary rotation crank and in order to the cam pin of the connecting rod that links shank, encircle coaxially with the fitting portion of crank side and to establish locating ring, opposing part at the end face of this locating ring and crank is provided with clamping close device, in the circumferential locations of this clamping close device engaging with the fixing what crank side of this fitting portion, in the adjustment of this circumferential locations that can't carry out with the position of Visual Confirmation and fixedly become easy and can positively implement, the play and the position deviation of Hou needn't be worried to take place to adjust again, the shank stroke can be adjusted accurately.
Again,, when making this locating ring and crank engaging, determine the circumferential locations of this cam pin with can worrying position deviation, can keep adjusting the shank stroke of back really via clamping close device because of being integral at textural locating ring 6 and cam pin 4.
Again, prominent establish the engaging protrusion of what crank end face and all machining gaps form outside locating ring slot constitutes this clamping close device, in the scope of the inclined to one side length of cam pin, can be divided into multistage and adjust the shank stroke because of utilizing.
In addition, constitute engaging protrusion because of the end face at crank sets pin, the present invention has the slot that can easily form engaging protrusion, order and the locating ring side of the size of wanting in want position positively to engage, and can adjust the effect of excellences such as shank stroke.
More than be in order to understand the present invention's technical content fully at the example or the embodiment that describe the hurdle reality in detail of invention, the present invention only is not defined as this concrete example and is explained by narrow sense ground, can carry out various change Hous enforcements in the described scope of the present invention's spirit and request scope.
Claims (6)
1, a kind of sewing machine needle bar stroke regulator is characterized in that comprising:
Connecting rod, its with the moving up and down together shank of pin among the way, an end is propped up by axle;
Axle is integral rotation on the crank, itself and Sewing machines;
Cam pin, the other end that it links this crank and this connecting rod makes and these fitting portion off-centre separately;
Locating ring, the fitting portion of the crank side of itself and this cam pin encircles coaxially to be established; And
Clamping close device, its opposing part at the end face of this locating ring and this crank constitutes, and both position whats engage with each other when giving fixed circumferential locations;
Nationality the circumferential locations in this clamping close device engaging, with the fitting portion of this crank axle side location, adjusts rotation along with axle this on via on this shank of this crank and connecting rod generation time dynamic stroke.
2, sewing machine needle bar stroke regulator according to claim 1 is characterized in that: this locating ring and this cam pin are integral structure.
3, sewing machine needle bar stroke regulator according to claim 1, it is characterized in that: this clamping close device comprises:
Engaging protrusion is based in this crank end face; And
Slot forms breach and in the circumferential locations and the engaging of this engaging protrusion of this appointment in the periphery of this locating ring.
4, as sewing machine needle bar stroke regulator as described in the claim 3, it is characterized in that: this slot is on the circumference of this locating ring and be provided with a plurality of.
5, as sewing machine needle bar stroke regulator as described in the claim 3, it is characterized in that: the end face at this crank sets pin, and constitutes this engaging protrusion.
6, as sewing machine needle bar stroke regulator as described in the claim 3, it is characterized in that: this locating ring and this cam pin are integral structure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3509298A JPH11226283A (en) | 1998-02-17 | 1998-02-17 | Needlebar stroke adjusting device of sewing machine |
| JP035092/1998 | 1998-02-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1226617A CN1226617A (en) | 1999-08-25 |
| CN1103392C true CN1103392C (en) | 2003-03-19 |
Family
ID=12432323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99100714 Expired - Fee Related CN1103392C (en) | 1998-02-17 | 1999-02-10 | Needle bar stroke adjust device of sewing machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH11226283A (en) |
| CN (1) | CN1103392C (en) |
| TW (1) | TW404998B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3646067B2 (en) * | 2001-01-26 | 2005-05-11 | ペガサスミシン製造株式会社 | Sewing machine needle bar stroke changing device |
| JP4722300B2 (en) * | 2001-01-29 | 2011-07-13 | Ｊｕｋｉ株式会社 | Needle bar stroke adjustment device |
| JP4747742B2 (en) * | 2005-08-30 | 2011-08-17 | ブラザー工業株式会社 | Sewing machine needle bar drive device and sewing machine |
| CN103147237A (en) * | 2013-03-20 | 2013-06-12 | 新杰克缝纫机股份有限公司 | Eccentric pin for take-up lever |
| KR101495287B1 (en) * | 2014-07-29 | 2015-02-24 | 김광연 | Specifications variable conversion device of sewing machine |
| CN104131422B (en) * | 2014-07-29 | 2017-05-03 | 杰克缝纫机股份有限公司 | Sewing machine with adjustable needle bar stroke |
| CN104652053B (en) * | 2015-02-10 | 2017-09-15 | 江苏万工科技集团有限公司 | There are six Gan Chuanliao mechanisms of pause function in upper extreme position |
| CN107059270B (en) * | 2016-12-28 | 2020-02-14 | 杰克缝纫机股份有限公司 | Sewing machine and vibration reduction mechanism thereof |
| CN106854798B (en) * | 2016-12-28 | 2020-03-24 | 杰克缝纫机股份有限公司 | Sewing machine and vibration damper thereof |
| CN106757844B (en) * | 2016-12-28 | 2020-01-31 | 杰克缝纫机股份有限公司 | sewing machine and damping structure thereof |
| CN106637729B (en) * | 2016-12-28 | 2020-02-07 | 杰克缝纫机股份有限公司 | Sewing machine and mechanism for reducing vibration of sewing machine |
| CN108122709B (en) * | 2017-11-10 | 2020-01-03 | 平高集团有限公司 | Transmission mechanism with adjustable initial position and circuit breaker using transmission mechanism |
| CN110438677A (en) * | 2019-09-10 | 2019-11-12 | 上海博岙机电制造有限公司 | The shank linkage carriage of crosspointer longitudinal direction colour changing computer embroidery machine |
| CN112877928B (en) * | 2021-01-28 | 2023-02-17 | 星锐缝纫机(嘉兴)有限公司 | Sewing machine structure |
-
1998
- 1998-02-17 JP JP3509298A patent/JPH11226283A/en active Pending
- 1998-11-16 TW TW87118954A patent/TW404998B/en not_active IP Right Cessation
-
1999
- 1999-02-10 CN CN 99100714 patent/CN1103392C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| TW404998B (en) | 2000-09-11 |
| CN1226617A (en) | 1999-08-25 |
| JPH11226283A (en) | 1999-08-24 |
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