CN101109136B - Drive partition mechanism of sewing machine - Google Patents
Drive partition mechanism of sewing machine Download PDFInfo
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- CN101109136B CN101109136B CN2007101305740A CN200710130574A CN101109136B CN 101109136 B CN101109136 B CN 101109136B CN 2007101305740 A CN2007101305740 A CN 2007101305740A CN 200710130574 A CN200710130574 A CN 200710130574A CN 101109136 B CN101109136 B CN 101109136B
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- 238000009958 sewing Methods 0.000 title claims abstract description 63
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- 238000009830 intercalation Methods 0.000 description 6
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Abstract
Provided is a drive partition mechanism of a sewing machine, which can simply adjust the abutting and clamping timing of a partition frame and a partition cam, ensure a long idle period, and stop the sewing machine under the state of reducing impact by using more kinetic energy of the sewing machine. The pulley fixing device is provided with a mounting adjusting unit which adjusts the mounting angle of the pulley pressing plate (20) relative to the partition frame (11). The installation adjusting unit is composed of the following parts: a swing center shaft (40) of the pulley pressing plate (20); an eccentric pin (41) for swinging the pulley pressing plate (20) around the swing center axis; an eccentric pin long hole (41A) formed in the pulley pressing plate (20) and rotatably fitted to the eccentric pin (41); and fixing means (42, 43) for fixing the pulley pressing plate to the arm portion.
Description
Technical field
The present invention relates to the driving separating mechanism in the button sewing machine.
Background technology
As this driving separating mechanism, can illustration below shown in the driving separating mechanism (existing example) of Sewing machines.
Fig. 5 is the front elevation of wanting portion's structure of the driving separating mechanism in the existing example of explanation, and Fig. 6 is its profile.
Face side at the sewing machine stand of this Sewing machines 1 supports main drive shaft 2 rotationally, on main drive shaft 2, and fixing eccentric discoid partition cam 3.On this partition cam 3, cam part 5 is set, it is by constituting across upright relative main hooking sheet 5A and the auxiliary hooking sheet 5B of certain intervals.And in the face side of cutting off cam 3, fixing axis with aforementioned main drive shaft 2 is the just round clutch plate 6 at center; Its material such as cork by hard constitutes; Fixing the ring 6A that iron plate is processed on its side face, in the face side of clutch plate 6, drive pulley 7 is rotating through not shown bearing; And the mode that can on axis direction, slide is supported on the aforementioned main drive shaft 2.
In the positive central authorities of aforementioned drive pulley 7, the lid 8 of the configuration space of fixed blocking bearing between this lid 8 and aforementioned main drive shaft 2, is installed preloading spring 9, and it continues drive pulley 7 to the direction pretension away from clutch plate 6.Form recess at the lateral surface of aforementioned cover 8, in this recess, be provided with remain on itself and after the ball 10 of 20 of the belt pulley pressing plates stated.
And aforementioned drive pulley 7 links parts and not shown sewing machine electromotor binding through belt etc., utilizes this sewing machine electromotor and rotates.Therefore, when making, when aforementioned drive pulley 7 breaks away moving and when pushing the inclined plane of this clutch plate 6 to aforementioned partition cam 3; This two binding; The rotation of drive pulley 7 is passed to aforementioned main drive shaft 2, in addition, if pushing of aforementioned drive pulley 7 is disengaged; Then this drive pulley 7 breaks away from from the side of the clutch plate 6 of aforementioned partition cam 3, and rotary power is cut off.
On the other hand, near aforementioned partition cam 3, be provided with the partition frame 11 that the rotation that is used to make this partition cam 3 stops.This partition frame 11 is supported on the back shaft 12, and the mode of this back shaft 12 swinging abreast with aforementioned main drive shaft 2 is supported on the aforementioned sewing machine stand.On the top that cuts off frame 11, to the extended frame body 14 of direction of the axis quadrature of aforementioned main drive shaft 2, support by a pair of support portion 11A, 11B.On an end of aforementioned frame body 14, corresponding with the top of aforementioned partition cam 3, fixedly snap-latch piece 15, and it can be with respect to cam part 5 engagings, the disengaging that are made up of aforementioned main hooking sheet 5A and auxiliary hooking sheet 5B.And; The partition frame 11 of bracing frame main body 14; Utilization is erected at the spiral helicine extension spring 13 between itself and the aforementioned sewing machine stand, continues counterclockwise to draw for middle mind-set with back shaft 12, and an end of aforementioned frame body 14 is to the configuration side pretension of aforementioned partition cam 3.
In addition, on the arm 11C that gives prominence to the face side of cutting off frame 11, the base end part of fast pulley pressing plate 20.On the open end of belt pulley pressing plate 20; Be provided with action cam part 20A; Its at aforementioned partition frame 11 when clockwise direction is swung; Cut off frame 11 integratedly to same direction swing with this, push aforementioned ball 10, make aforementioned drive pulley 7 combine with the clutch plate 6 of aforementioned partition cam 3 to link through the effect of resisting aforementioned spring 9.
Aforementioned activities cam part 20A forms the inclined-plane with drive pulley 7 relative faces; Itself and the gap size that between the surface of lid 8 of configuration on the drive pulley 7, forms; Along with increasing downwards and gradually; At belt pulley pressing plate 20 along with cutting off frame 11 to clockwise swing; With respect to the surface of the lid 8 of aforementioned drive pulley 7 and when swung the top, in action cam part 20A that forms on the aforementioned inclined-plane and the butt degree between the ball 10 of configuration on the aforementioned cover 8, the pressing force of promptly pushing aforementioned ball 10 changed.
In addition, in the following side of the opposite side that cuts off frame 11, be provided with outstanding tab 11D downwards.With the corresponding downside of this tab 11D, link parts 21 and the actuating strut 22 that not shown pedal links via chain etc., be supported on swingably on the brace table 23 that is fixed on the aforementioned sewing machine stand.On this actuating strut 22, be provided with action pin 24, when it is swung utilizing pedal, make aforementioned tab 11D action, make and cut off the clockwise direction swing of frame 11 to the effect of opposing extension spring 13.
In addition, near the sewing machine stand above the aforementioned partition cam 3, the back shaft 25 of the parallel axes of fixing and aforementioned main drive shaft 2.The open end of aforementioned back shaft 25 can swing and the state of anti drop-off, is supporting the base end part of brake components 26, and this brake components 26 is used for applying brake force to aforementioned clutch plate 6.Fixing brake scotch 27 below this brake components 26, it has the radius of curvature radius of curvature about equally with the side face of aforementioned clutch plate 6, and is made up of materials such as leathers via the installation sheet of bending in the horizontal direction.In the open end of aforementioned brake components 26, be provided with the perforate 28 of the elliptical shape that is used to constitute cam follower.And; In aforementioned back shaft 25; Insert the coiler part of the centre of supporting preloading spring 29, one of which end card ends on the latch 30 that is fixed on the aforementioned back shaft 25, and the other end is resisted its elastic force and blocked only on the upper surface portion of aforementioned brake components 26 simultaneously.Therefore, aforementioned brake components 26 utilizes the effect of aforementioned preloading spring 29, continues the direction pretension that contacts with the side face of clutch plate 6 to this brake scotch 27.
On the other hand; On the part corresponding of aforementioned brake components 26 with perforate 28; Insert the axial region 31A that supports eccentric cam 31 rotationally, in the perforate 28 of the aforementioned brake components 26 of its movable embedding, on its lateral surface, form embeded slot 31B; It is used for adjustment instruments such as chimeric straight screwdriver, makes self adjustment rotation.
In addition, corresponding with the axial region 31A of aforementioned eccentric cam 31, on aforementioned brake components 26, support dogbolt 32, it fixes aforementioned axial region 31A through screwing togather and unclamping, or allows the rotation of this axial region 31A.
Therefore, aforementioned brake components 26 can freely rotate in the scope of the difference in size of the diameter of the inside dimensions of the aforementioned perforate 28 of its rotation direction and aforementioned eccentric cam 31.
Under the situation of stipulating by the existing sewing machine that constitutes like this 1 of making; Through stepping aforementioned pedal; Actuating strut 22 swings via linking parts 21, its action pin 24 pushings cut off the tab 11D of frame 11, make the effect that cuts off frame 11 opposing extension springs 13; Clockwise direction swing in figure is positioned at and removes the position.Like this; The snap-latch piece 15 that is supported on this partition frame 11 breaks away to the top from the cam part 5 of cutting off cam 3; Simultaneously, be fixed on the upper inside surface butt of eccentric cam 31 and the perforate 28 of brake components 26 on this partition frame 11, and this brake components 26 is swung to the top; Its brake scotch 27 breaks away to the top from the ring 6A of clutch plate 6, becomes the braking disarm state.
On the other hand; After effect is just removed in this braking; The action cam 20A of belt pulley pressing plate 20 is passed to the transmission position swing that cuts off cam 3 to the driving force with drive pulley 7, pushes drive pulley 7 through the effect that makes ball 10 antagonistic springs 9, makes this drive pulley 7 combine to link with the clutch plate 6 that cuts off cam 3; The rotation of this drive pulley 7 is passed to main drive shaft 2, and that stipulates makes.
And; Unclamp pedal if finish making of regulation, then actuating strut 22 returns swing to clockwise direction, and its action pin 24 is removed the racking of the tab 11D that cuts off frame 11; Utilize the elastic force effect of extension spring 13 to make the counter clockwise direction swing of partition frame 11 in figure, be in clamped position.Like this; The action cam part 20A of belt pulley pressing plate 20; To the partition position swing that the driving force of cutting off cam 3 is transmitted, releasing cuts off the driving force transmission of 7 pairs of main drive shafts 2 of drive pulley to pushing of ball 10 to partition drive pulley 7, and then the snap-latch piece 15 that is supported on the partition frame 11 stops this partition cam 3 with the main hooking sheet 5A butt that cuts off cam 3; Simultaneously, the eccentric cam 31 that is fixed on this partition frame 11 descends.Because the decline of this eccentric cam 31, brake components 26 utilizes the elastic reaction of preloading spring 29 to swing downwards, and the side face butt of the ring 6A of its brake scotch 27 and clutch plate 6 applies braking action to clutch plate 6.Promptly; Brake scotch 27 is cutting off frame 11 from aforementioned releasing position during to aforementioned clamped position swing; Work as the brake component that applies the brake force of braking main drive shaft 2, last, aforementioned eccentric cam 31 is pushed the below inner surface of the perforate 28 of brake components 26 downwards; Aforementioned brake scotch 27 effectively is pressed on the side face of ring 6A of clutch plate 6, forms on-position.
In the existing sewing machine 1 that constitutes like this; When 27 wearing and tearing of the brake scotch of aforementioned brake components 26 etc. under the situation; Can be through unclamping dogbolt 32, with the suitably rotation of the aforementioned eccentric cam 31 of adjustment of instruments such as straight screwdriver, then through tightening dogbolt 32; Adjustment at random makes timing that aforementioned brake scotch 27 contacts with the side face of the ring 6A of clutch plate 6 and pressing force thereof (more than, with reference to patent documentation 1).
Yet; Disposed the Sewing machines 1 of aforementioned driving separating mechanism; Because increase along with access times; Friction changes gradually and increases, thereby only occurs being difficult to tackle fully time dependent problem through adjusting brake scotch 27 as the frictional resistance parts (make it contact with the side face of clutch plate 6 timing and pressing force).
On the other hand, there is not record in the aforementioned patent document 1, but in aforesaid existing Sewing machines 1; If pedal is stopped in cam part 5 and the snap-latch piece 15 approaching inferior careless timings of situation; Then do not carry out deceleration and the cam part 5 high speed impact snap-latch pieces 15 of brake scotch 27 fully, driving mechanism is damaged, so after Sewing machines 1 starting; Must Sewing machines 1 be stopped; Between the deceleration period in order to ensure brake scotch 27, be provided with the control cam mechanism simultaneously, it makes cam part 5 engage with snap-latch piece 15 after making the idle period that cuts off cam 3 rotation regulations.
Fig. 7 is the figure that wants portion's structure that explanation is used to form the control cam mechanism of this idle period.In addition, for acting on identical parts, mark same label and omit its explanation with the Sewing machines 1 of the aforementioned the 1st existing example.
In the rear side of sewing machine stand, as shown in Figure 7, be provided with and cut off bar 35, the one of which end links with the back shaft that cuts off frame 11 12, in the roller portion 36 that the other end configuration that cuts off bar 35 can be rotated flexibly.In addition, near partition bar 35, can dispose roughly discoid control cam 37 flexibly rotatably, the revolving force that it utilizes the drive pulley 7 that transmits via main drive shaft 12 can carry out the driving of a stitch cycle through rotating a circle.37 on cam of control is supported on the camshaft 37a; This camshaft 37a is via the rotary driving force of not shown gear transmission main drive shaft 2, forms the circular 38b of driving cam portion at its peripheral part, and it is via the aforementioned roller portion 36 that cuts off bar 35; Make partition frame body 14 be positioned at aforementioned releasing position; With the stopping cam part 38a and cut off frame body 14 of the concavity that main drive shaft 2 is stopped, be maintained aforementioned clamped position, make main drive shaft 2 rotations.
And during the stopping of aforementioned Sewing machines 1 before making beginning, the cam part 38a that stops that controlling cam 37 stops on the position shown in the dotted line S of Fig. 7, and roller portion 36 utilizes the pretightning force of extension spring 13 to be connected to stop on the cam part 38a.If the operator steps on pedal, then back shaft 12 is resisted the pretightning force of extension spring 13 with cutting off frame 11, and the counter clockwise direction in Fig. 7 is rotated, and roller portion 36 breaks away from by stopping cam part 38a shown in the dotted line S.So; Because the rotation of back shaft 12; Belt pulley pressing plate 29 rotates, and the rotating drive power of drive pulley 7 passes to main drive shaft 2 via clutch plate 6, the stitch cycle that begins to stipulate; The rotary driving force of main drive shaft 2 is given control cam 37 via not shown gear transmission simultaneously, and control cam 37 begins the clockwise direction rotation to Fig. 7.And, utilizing the rotation of control cam 37, roller portion 36 strides across on the 38b of driving cam portion of control cam 37.Therefore, even the operator removes stepping of pedal at this moment, also keep the turned position of swing arm 35, main drive shaft 2 is kept rotation status.
In addition, as shown in Figure 8, control cam 37 continues rotation, finishes the stitch cycle of regulation, falls into through the roller portion 36 with the partition bar 35 of the 38b of driving cam portion butt to stop in the cam part 38a, and Sewing machines 1 becomes idling conditions.That is, when Sewing machines 1 idle running, also swing with the partition frame 11 that cuts off bar 35 bindings; Be installed in the action cam part 20A that cuts off the belt pulley pressing plate 20 on the frame 11 and remove pushing of drive pulley 7, remove the engaging of the drive pulley 7 and the clutch plate 6 of the main axle 2 that drives, simultaneously; Brake scotch 27 contacts with clutch plate 6, carries out the braking of idle period, after this; Through the snap-latch piece 15 that cuts off frame 11 is engaged with the cam part 5 of cutting off cam 3, Sewing machines 1 is stopped.
Through above-mentioned formation; Even the arbitrary timing of operator in the middle of making removed stepping of pedal; After also can only finishing Sewing machines 1 is stopped, stopping Sewing machines 1 after can guaranteeing between the deceleration period of being undertaken simultaneously by brake scotch 27 at 1 stitch cycle of regulation.
Therefore,, be difficult to fully tackle the time dependent problem of the friction that increases gradually along with access times to only utilizing brake scotch 27 adjustment, current, also adopt the method for the idle period in the above-mentioned control cam mechanism of adjustment.That is to say, stop the phase change of cam part 38a, be reinstalled on this camshaft 37a the adjustment idle period through controlling cam 37 with respect to the roller portion 36 that cuts off bar 35 in order to make.
Patent documentation 1: the spy opens flat 8-332295 communique
Summary of the invention
Yet; Because in fact this adjustment must drive Sewing machines 1 on one side; In the face side of Sewing machines, range estimation cuts off frame 11 and butt, the fastening state of cutting off cam 3 on one side, through listening confirm on one side; Adjustment on one side is positioned at the phase place of control cam 37 of the rear side of Sewing machines 1, thereby is loaded down with trivial details and needs the operation of experience.
Therefore, the objective of the invention is to, a kind of driving separating mechanism of Sewing machines is provided; It can cut off frame and the butt that cuts off cam, engaging adjustment regularly easily, guarantees long idle period, at the kinetic energy that consumes Sewing machines more; Reduce under the state that impacts, Sewing machines is stopped.
To achieve these goals, the driving separating mechanism of Sewing machines of the present invention has: belt pulley (7), and it utilizes the rotation of main motor to be driven in rotation; Main drive shaft (2), it can utilize the rotation of belt pulley and be driven in rotation; Discoid partition cam (3), it is configured on the aforementioned main drive shaft, on circumference, forms the cam part (5) that can engage with snap-latch piece; Clutch plate (6), it is the center with the axis identical with the axis of aforementioned main drive shaft, can dispose with rotating freely; Between aforementioned belt pulley and partition cam; Utilize elastic force at ordinary times and be positioned at the position of separating, cut off the transmission of the driving force of belt pulley thus, in addition with belt pulley; Push belt pulley through the opposing elastic force, transmit the driving force of belt pulley; Cut off frame (11); It has that front end is fixed with snap-latch piece and to the frame body (14) that extends with the direction of the axis quadrature of aforementioned main drive shaft; This partition frame is configured on the back shaft (12) swingably, so that aforementioned snap-latch piece is positioned at the releasing position that the clamped position that engages with the cam part of aforementioned partition cam and releasing engage with the cam part of aforementioned partition cam; Belt pulley pressing plate (20); It is a long plate shape; In leading section formation aforementioned belt pulley is pressed into the action cam part (20A) on the clutch plate; This belt pulley pressing plate and aforementioned partition frame are swung integratedly, can and cut off the partition position of aforementioned transmission to the transmission position of aforementioned partition cam transmission to correspond respectively to the swing of aforementioned partition frame between aforementioned releasing position and aforementioned clamped position, the aforementioned activities cam part is positioned at the driving force that makes aforementioned belt pulley; And brake component (27); Its at aforementioned partition frame from aforementioned releasing position during to the swing of aforementioned clamped position; Apply the brake force of the aforementioned main drive shaft of braking; It is characterized in that having installation adjustment unit (40,41,41A, 42), its adjustment belt pulley pressing plate is with respect to the setting angle of aforementioned partition frame.
In the driving separating mechanism of the Sewing machines that constitutes like this; Setting angle through belt pulley pressing plate fixing on the partition frame that is adjusted at the face side that is disposed at Sewing machines; Change the position of the leading section of belt pulley pressing plate; Thereby the snap-latch piece that can adjust with respect to cut off frame with cut off the partition timing of timing that cam engage and brake component apply driving force timing, the partition belt pulley from braking to main drive shaft to the transmission of clutch plate; Its result can adjust the length of the idle period of clutch plate and main drive shaft.
Particularly, as aforementioned installation adjustment unit, have: the oscillation center axle (40) of aforementioned belt pulley pressing plate (20); Cam pin (41), it is used to make the belt pulley pressing plate is the center swing with aforementioned oscillation center axle; Cam pin is with slotted hole (41A), and it is formed on the belt pulley pressing plate, make aforementioned cam pin can rotate freely ground chimeric; And fixed cell (42), it is fixed to the belt pulley pressing plate on the arm.
According to this installation adjustment unit; Through cam pin and cam pin are rotated with slotted hole is chimeric; Can make the belt pulley pressing plate so that the action cam part of the leading section of belt pulley pressing plate is positioned at the mode of desired location rotates, the belt pulley pressing plate fixed by the aforementioned fixation unit.
The effect of invention
Driving separating mechanism according to Sewing machines of the present invention; Through utilizing the position of the leading section that adjustment unit adjustment drive pulley pressing plate is installed; Can adjust with the snap-latch piece that cuts off frame with cut off the timing that cam engage and brake component is corresponding to the timing that main drive shaft applies braking, cut off the partition timing of the driving force of belt pulley to the transmission of clutch plate; Its result can adjust the length of the idle period of clutch plate and main drive shaft, and owing to cut off through adjustment as early as possible and regularly to guarantee long idle period; Can make the kinetic energy consumption of Sewing machines; Thereby can obtain following good result: the snap-latch piece that cuts off frame is engaged with the cam part of cutting off cam, reduce the impact when Sewing machines is stopped, the deterioration that can reduce the wearing and tearing of aforementioned brake components and delay durability in addition.
Description of drawings
Fig. 1 be Sewing machines of the present invention the driving separating mechanism an embodiment want portion's oblique view.
Fig. 2 be Fig. 1 to partly separate oblique view.
Fig. 3 (a) is the plane of the belt pulley pressing plate in this embodiment of expression, (b) is the A-A profile.
Fig. 4 is the key diagram of swing state of rotation and the belt pulley pressing plate of expression cam pin.
Fig. 5 be existing sewing machine the driving separating mechanism want portion's front elevation.
Fig. 6 be existing sewing machine the driving separating mechanism want portion's profile.
Fig. 7 be from rear side observe existing sewing machine the driving separating mechanism want portion's oblique view.
Fig. 8 wants portion's oblique view from another of driving separating mechanism that rear side is observed existing sewing machine.
The specific embodiment
In Fig. 1 and Fig. 2, omitted the diagram of each parts of brake scotch 27 and drive brake watts 27.
In addition, in following embodiment, the difference of the Sewing machines that only uses in the explanation of explanation and aforesaid existing example is main points of the present invention.Label in the specification uses same title and label to the parts identical with the Sewing machines effect of aforementioned existing example.
The driving separating mechanism of the Sewing machines of this embodiment has the installation adjustment unit, its adjustment belt pulley pressing plate 20 setting angles with respect to aforementioned partition frame 11.
That is to say; The installation adjustment unit of this embodiment has guide finger 40 and nut 40a; This guide finger 40 runs through the guide finger that is formed on the belt pulley pressing plate 20 with among the axis hole 40A, makes guide finger that the front end intercalation goes into arm 11C with among the axis hole 40B, becomes the oscillation center axle of belt pulley pressing plate 20; In addition; The installation adjustment unit of this embodiment also has cam pin 41, and it runs through cam pin on the base end part that is formed at aforementioned belt pulley pressing plate 20 with among the slotted hole 41A, and the eccentric round platform 41a of portion is configured in cam pin with in the slotted hole 41A; The front end intercalation is gone into the cam pin of arm 11C with among the 41B of hole, and making belt pulley pressing plate 20 is the oscillation center swing with aforementioned guide finger 40.In addition; The installation adjustment unit of this embodiment also has the set bolt 42 as fixed cell; Its run through the guide finger that is formed at aforementioned belt pulley pressing plate 20 with axis hole 40A and cam pin with the set bolt between the slotted hole 41A with among the screwed hole 42A; Front end is screwed on the set bolt of arm 11C with among the screwed hole 42B, and the belt pulley pressing plate 20 of swing is screwed on the arm 11C that cuts off frame 11.
At length say; On the arm 11C that cuts off frame 11; Form vertical plane in the front, on this vertical plane, penetrate and guide finger is set uses axis hole 40B; Front end intercalation as the guide finger 40 of the oscillation center axle of belt pulley pressing plate 20 is gone into wherein, so that belt pulley pressing plate 20 is with required setting angle fixed configurations.In addition; On aforementioned vertical plane; Penetrate and cam pin is set uses screwed hole 42B with hole 41B and set bolt; This cam pin goes into to make the front end of the cam pin 41 of belt pulley pressing plate 20 swing with intercalation among the 41B of hole, and this set bolt is screwed to the front end of the set bolt 42 on the partition frame 11 with screwing togather the belt pulley pressing plate 20 that makes swing among the screwed hole 42B.And, on aforementioned arm 11C, also penetrating and dogbolt is set uses screwed hole 43B, it screws togather the front end of dogbolt 43 to extending with the direction of the depth direction quadrature of hole 41B with aforementioned cam pin.
In addition, belt pulley pressing plate 20 on the pars intermedia that becomes on the length direction of long plate shape, forms guide finger and use axis hole 40A, base end part, promptly with the end of the opposite side of leading section that forms action cam part 20A on, the formation cam pin is used slotted hole 41A.Aforementioned cam pin is used slotted hole 41A, and making the scope of difference in size of diameter of the fitting portion of inside dimensions and aforementioned cam pin 41 on the rotation direction of the eccentric round platform 41a of portion of cam pin 41 is fixed range, can in this scope, freely rotate.In addition, aforementioned guide finger with axis hole 40A and cam pin with slotted hole 41A between, form set bolt and use screwed hole 42A, its diameter dimension can move the intercalation position of aforementioned threads axle greater than the diameter dimension of the thread spindle of set bolt 42 in the longitudinal direction.
And; In the Sewing machines 1 of this embodiment, with respect to the arm 11C that cuts off frame 11, with guide finger 40 as oscillation center; Make cam pin 41 rotations; So that the position of the action cam part 20A of the leading section of belt pulley pressing plate 20 is in desired location, the guide finger that above-mentioned guide finger 40 inserts belt pulley pressing plates 20 is with among the axis hole 40A, fixes with nut 40a under with the state of axis hole 40B at the guide finger that makes leading section be arranged in arm 11C; Above-mentioned cam pin 41 makes cam pin that the eccentric round platform 41a of portion intercalation goes into belt pulley pressing plate 20 with among the slotted hole 41A, must make cam pin that leading section is positioned at arm 11C with hole 41B.And, under this state, with respect to arm 11C; With dogbolt 43 be screwed to the direction of aforementioned cam pin with the depth direction quadrature of hole 41B on penetrate setting dogbolt with screwed hole 43B in; Through make its front end face to cam pin with hole 41B in, fixing aforementioned cam pin 41, simultaneously; With the set bolt among the screwed hole 42B 42, it is fixing that belt pulley pressing plate 20 is screwed togather with screwed hole 42A and set bolt for the set bolt that utilization is screwed to aforementioned belt pulley pressing plate 20.
In the driving separating mechanism of adjusted like this Sewing machines 1; When setting in the early stage; The action cam 20A of the leading section of belt pulley pressing plate 20; Regularly adjust early in order to remove pushing of drive pulley 7,, adjust aforementioned belt pulley pressing plate 20 with respect to the setting angle that cuts off frame so that the position of aforementioned activities cam part 20A is in the mode of desired location.Thus; The timing of the timing that engages with the cam part 5 of cutting off cam 3 with respect to the snap-latch piece 15 that cuts off frame 11 and the ring 6A butt of brake scotch 27 and clutch plate 6; Remove the engaging of the clutch of aforementioned drive pulley 7 and main drive shaft 2 as soon as possible; Driving force can make partition belt pulley 7 shifts to an earlier date to the timing of the transmission of clutch plate 6, thereby can prolong the idle period of Sewing machines.And; If can prolong the time of Sewing machines through the inertia rotation; Consume the kinetic energy of Sewing machines more; Then can reduce through the snap-latch piece 15 that cuts off frame 11 is engaged on the cam part 5 of cutting off cam 3, and the impact when Sewing machines 1 is stopped, can postponing as the wearing and tearing of the ring 6A of the brake scotch 27 of friction opposing parts and clutch plate 6 and the deterioration of durability.
In addition; When restarting the driving of Sewing machines 1; Make actuating strut 22 swings that are supported on swingably on the brace table 23 that is fixed on the sewing machine stand,, make aforementioned tab 11D action through pressing action pin 24; Make and cut off the direction swing of frame 11, make partition frame 14 be positioned at clamped position to the effect of the aforementioned extension spring 13 of opposing.
Like this, can make aforementioned roller portion 36, with the 38b of the driving cam portion butt of control cam 37, this control cam 37 utilize via clutch and gear and under the state that slows down the rotary power of the drive pulley 7 of transmission be rotated.In addition; Since along with the swing that cuts off frame 11, aforementioned belt pulley pressing plate 10 swings, and action cam 20A pushes drive pulley 7; Make the clutch engaging of drive pulley 7 and main drive shaft 2, and the snap-latch piece 15 that cuts off frame 11 is also removed with respect to the engaging of the cam part 5 of cutting off cam 3.Therefore, Sewing machines 1 becomes driving condition.
As stated; Driving separating mechanism according to the Sewing machines 1 of this embodiment; Can utilize the position of the leading section that adjustment unit adjustment drive pulley pressing plate 20 is installed; Its result can adjust simply and control and cut off frame 11 and the butt that cuts off cam 3, the timing of engaging, so that guarantee long idle period.As stated; Through guaranteeing long idle period; Can consume the kinetic energy of Sewing machines 1 more; Thereby can reduce and the snap-latch piece 15 that cuts off frame 11 is engaged and impact when Sewing machines 1 is stopped and the friction of brake scotch 27 with the cam part 5 of partition cam 3, can delay the wearing and tearing of aforementioned snap-latch piece etc. and the deterioration of durability.
In addition, the present invention is not limited to aforementioned embodiments, can carry out all changes as required.
For example, the axis hole that on the belt pulley pressing plate of aforementioned driving separating mechanism, forms and the configuration and the shape of screwed hole are not limited to this embodiment, and key is, rotate through making cam pin, and be the center with the oscillation center axle, make a distolateral swing of target.
Claims (2)
1. the driving separating mechanism of a Sewing machines has:
Belt pulley, it utilizes the rotation of main motor to be driven in rotation;
Main drive shaft, it can utilize the rotation of belt pulley and be driven in rotation;
Discoid partition cam, it is configured on the aforementioned main drive shaft, on circumference, forms the cam part that can engage with snap-latch piece;
Clutch plate, it is the center with the axis identical with the axis of aforementioned main drive shaft, can dispose with rotating freely; Between aforementioned belt pulley and partition cam; Utilize elastic force at ordinary times and be positioned at the position of separating, cut off the transmission of the driving force of belt pulley thus, in addition with belt pulley; Push belt pulley through the opposing elastic force, transmit the driving force of belt pulley;
Cut off frame; It has that front end is fixed with snap-latch piece and to the frame body that extends with the direction of the axis quadrature of aforementioned main drive shaft; This partition frame is configured on the back shaft swingably, so that aforementioned snap-latch piece is positioned at the releasing position that the clamped position that engages with the cam part of aforementioned partition cam and releasing engage with the cam part of aforementioned partition cam;
The belt pulley pressing plate; It is a long plate shape; In leading section formation aforementioned belt pulley is pressed into the action cam part on the clutch plate; This belt pulley pressing plate and aforementioned partition frame are swung integratedly, can and cut off the partition position of aforementioned transmission to the transmission position of aforementioned partition cam transmission to correspond respectively to the swing of aforementioned partition frame between aforementioned releasing position and aforementioned clamped position, the aforementioned activities cam part is positioned at the driving force that makes aforementioned belt pulley; And
Brake component, it during to the swing of aforementioned clamped position, applies the brake force of the aforementioned main drive shaft of braking from aforementioned releasing position at aforementioned partition frame,
It is characterized in that,
Have the installation adjustment unit, its adjustment belt pulley pressing plate is with respect to the setting angle of aforementioned partition frame.
2. the driving separating mechanism of Sewing machines according to claim 1 is characterized in that,
Aforementioned installation adjustment unit has:
The oscillation center axle of aforementioned belt pulley pressing plate;
Cam pin, it is used to make the belt pulley pressing plate is the center swing with aforementioned oscillation center axle;
Cam pin is used slotted hole, and it is formed on the belt pulley pressing plate, make aforementioned cam pin can rotate freely ground chimeric; And
Fixed cell, it is fixed to the belt pulley pressing plate on the arm of aforementioned partition frame.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006196739 | 2006-07-19 | ||
| JP2006-196739 | 2006-07-19 | ||
| JP2006196739A JP2008022959A (en) | 2006-07-19 | 2006-07-19 | Drive interrupting mechanism for sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101109136A CN101109136A (en) | 2008-01-23 |
| CN101109136B true CN101109136B (en) | 2012-10-03 |
Family
ID=39041386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101305740A Active CN101109136B (en) | 2006-07-19 | 2007-07-18 | Drive partition mechanism of sewing machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2008022959A (en) |
| CN (1) | CN101109136B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2350411Y (en) * | 1998-12-30 | 1999-11-24 | 吕学忠 | Position adjusting structure of drive motor for feed mechanism of sewing machine |
| CN2476575Y (en) * | 2001-05-10 | 2002-02-13 | 上海黎明服装机械厂 | Driving mechanism of computer sewing machine |
| CN2499419Y (en) * | 2001-09-06 | 2002-07-10 | 上海黎明服装机械厂 | stop positioning mechanism for computer sewing machine |
| JP3505853B2 (en) * | 1995-06-09 | 2004-03-15 | ブラザー工業株式会社 | Sewing machine speed reducer |
| CN2737812Y (en) * | 2004-05-27 | 2005-11-02 | 进明针车有限公司 | Driving structure for sewing machine feed wheel |
-
2006
- 2006-07-19 JP JP2006196739A patent/JP2008022959A/en active Pending
-
2007
- 2007-07-18 CN CN2007101305740A patent/CN101109136B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3505853B2 (en) * | 1995-06-09 | 2004-03-15 | ブラザー工業株式会社 | Sewing machine speed reducer |
| CN2350411Y (en) * | 1998-12-30 | 1999-11-24 | 吕学忠 | Position adjusting structure of drive motor for feed mechanism of sewing machine |
| CN2476575Y (en) * | 2001-05-10 | 2002-02-13 | 上海黎明服装机械厂 | Driving mechanism of computer sewing machine |
| CN2499419Y (en) * | 2001-09-06 | 2002-07-10 | 上海黎明服装机械厂 | stop positioning mechanism for computer sewing machine |
| CN2737812Y (en) * | 2004-05-27 | 2005-11-02 | 进明针车有限公司 | Driving structure for sewing machine feed wheel |
Non-Patent Citations (1)
| Title |
|---|
| JP特许第3505853号B2 2004.03.15 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101109136A (en) | 2008-01-23 |
| JP2008022959A (en) | 2008-02-07 |
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