CN206512426U - A kind of more efficient machine head of embroidery machine - Google Patents

Abstract

The utility model discloses a kind of more efficient machine head of embroidery machine, belong to embroidery machine accessory field, including needle bar frame, shank and presser feet, the shank and presser feet are reciprocating relative to the needle bar frame, the machine head of embroidery machine also includes the fixing axle for being located at presser feet side, the clamping block for the spacing presser feet lifting is rotatablely equipped with the fixing axle, the clamping block is connected with the 3rd driver, and the 3rd driver drives the clamping block to be moved along the fixing axle axial reciprocating.The utility model has the advantage of the operating efficiency that can effectively improve machine head of embroidery machine.

Description

A kind of more efficient machine head of embroidery machine

【Technical field】

The utility model is related to a kind of more efficient machine head of embroidery machine, belongs to embroidery machine accessory field.

【Background technology】

With the development of science and technology computerized emboridering machine has become the main mechanical of embroidery industry, and in embroidery machine most It is the head section of embroidery machine for part and parcel.

Machine head of embroidery machine, substantially including needle bar frame, shank, presser feet, shank and presser feet can make longitudinal direction relative to needle bar frame Linear reciprocating motion, the whole movement travel of shank is broadly divided into first decline stage, sewing stage, complete return stage. And traditional machine head of embroidery machine, in these stages, what shank and presser feet were typically moved together, especially in the sewing stage, Shank drives presser feet to decline to compress cloth cover when declining, and drives presser feet to be gone up during shank rise simultaneously, actual in seam Thread work when, presser feet rise simply play a part of unclamp cloth, its real rise amount may without reach shank return Rising amount, this causes the rise amount of many times presser feet to be all excessive, and the rise of presser feet excessively is often made to machine head of embroidery machine Into the problem of vibrating excessive, bigger to shank load, so as to have a strong impact on the operating efficiency of embroidery machine.

【Utility model content】

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art and provide a kind of more efficient Machine head of embroidery machine, the operating efficiency of machine head of embroidery machine can be effectively improved.

Above-mentioned technical problem is solved, the utility model is adopted the following technical scheme that：

A kind of more efficient machine head of embroidery machine, including needle bar frame, shank and presser feet, the shank and presser feet are relative to institute State that needle bar frame is reciprocating, the machine head of embroidery machine also includes rotating in the fixing axle for being located at presser feet side, the fixing axle Clamping block for the spacing presser feet lifting is installed, the clamping block is connected with the 3rd driver, the 3rd driver The clamping block is driven to be moved along the fixing axle axial reciprocating.

Using the beneficial effects of the utility model：In the utility model, a clamping block is provided with presser feet side, and should Clamping block can be circumferentially rotated along fixing axle, the characteristic that can be circumferentially rotated using clamping block, when clamping block turns to presser feet Block above when, realize to the axial lock of presser feet so that presser feet can not continue to rise, when clamping block turns an angle Afterwards, after departing from above block, position-limiting action just will not be realized to block, presser feet can go back up to initial position.In presser feet quilt It is spacing can not rise during, the reciprocating motion of shank is not influenceed by presser feet, so as to allow the movement velocity of shank to be able to Lifting, meanwhile, after presser feet is limited, rise amount is reduced, so that machine head of embroidery machine vibrations are seldom, it is more steady during running.

And, cloth is all to need movement, and only fraction embroidery machine is in work due to most of embroidery machine operationally When making, cloth need not be moved, even if this is accomplished by presser feet when locked, it is also desirable to carry out axial reciprocating movement, so that Obtain presser feet to reduce or even without pressure the pressure of cloth, cloth could be allowed easily to move, therefore determine block in the utility model The 3rd driver is connected with, the 3rd driver drives the clamping block to be moved along the fixing axle axial reciprocating, so made Shank is obtained when ging up, clamping block also accordingly gos up, so as to allow presser feet to reduce even without pressure the pressure of cloth, work as shank During decline, clamping block also accordingly declines, so as to allow presser feet to increase the pressure of cloth.

Preferably, the clamping block includes fixed body and buoyancy body, the fixed body is by axial limiting in the fixation On axle, short spring is provided between the buoyancy body and fixed body, the buoyancy body is connected with the 3rd driver.Such knot Structure design is relatively compact, i.e. the axial movement of clamping block is concentrated between buoyancy body and fixed body.

Preferably, being provided with U-lag in the middle of the buoyancy body, fixed body is contained in U-lag, the end face of fixed body with The short spring is provided between the wall of the U-lag.The design of U-lag so that buoyancy body is for fixed body, two ends It is all spacing by two walls institute of U-lag, it will not depart from from U-lag, more compact structure.

Preferably, the 3rd driver includes the second cam and rocking bar, it is convexly equipped with the side wall of the buoyancy body floating Dynamic supports block, described rocking bar one end is offseted by second actuated by cams, the other end with the floating supports block.Shaken using cam engagement The structure of bar regularly drives buoyancy body to realize, simple in construction.

Preferably, the machine head of embroidery machine also includes being used to drive reciprocating first driver of the shank, institute Stating the first driver includes the first cam, and first cam and second cam coaxial are fixed.Allow the first cam and second Cam coaxial so that the first driver and the 3rd driver can share a driving source, saves space, reduces cost, also simultaneously Can increase linkage effect.

Preferably, being provided with adjusting screw close to one end of clamping block in the rocking bar, shaken by adjusting screw to adjust The distance between the end of bar and floating supports block., can be for regulation clamping block in fixation using the adjustment effect of adjusting screw Initial position on axle.

Preferably, the 3rd driver includes the 3rd motor, the 3rd motor is driven by third connecting rod mechanism The clamping block is moved back and forth.The reciprocating motion of clamping block, can also individually realize driving, this design side with the 3rd motor Formula is freer, is not only restricted to the influence of other structures.

Preferably, the machine head of embroidery machine also includes back-moving spring, when the shank declines, the back-moving spring is pressed Contracting, realizes when the presser feet gos up by the elastic force of the back-moving spring.Back-moving spring is resetted, and structure is comparatively Simply, while also easily locked block locking, is useful in the utility model very much.

Other features and advantage of the present utility model will be detailed in following embodiment, accompanying drawing exposure.

【Brief description of the drawings】

The utility model is described further below in conjunction with the accompanying drawings：

Fig. 1 is the structural representation of machine head of embroidery machine embodiment one in the utility model；

Fig. 2 is the exploded perspective view of machine head of embroidery machine embodiment one in the utility model；

Fig. 3 is the bottom views schematic diagram of the needle bar frame of machine head of embroidery machine embodiment one in the utility model；

Fig. 4 is shank, the assembling schematic diagram of presser feet in machine head of embroidery machine embodiment one in the utility model；

Fig. 5 is the schematic diagram of the center platen of machine head of embroidery machine embodiment one and pin folder in the utility model；

Fig. 6 is the structural representation of driver in machine head of embroidery machine embodiment one in the utility model；

Fig. 7 is the side schematic view of driver in machine head of embroidery machine embodiment one in the utility model；

Fig. 8 is the fundamental diagram of clamping block drive mechanism in machine head of embroidery machine embodiment one in the utility model；

Fig. 9 is the dislocation schematic diagram of the first cam and the second cam in machine head of embroidery machine embodiment one in the utility model；

Figure 10 is the cross-sectional view at the center platen of machine head of embroidery machine embodiment two in the utility model；

Figure 11 is the schematic diagram of the center platen of machine head of embroidery machine embodiment three and pin folder in the utility model；

Figure 12 is the schematic diagram of machine head of embroidery machine example IV center platen and pin folder in the utility model；

Figure 13 is the structural representation of driver in machine head of embroidery machine embodiment five in the utility model；

Figure 14 is the structural representation of driver in machine head of embroidery machine embodiment six in the utility model.

【Embodiment】

The technical scheme of the utility model embodiment is explained with reference to the accompanying drawing of the utility model embodiment and Illustrate, but following embodiments are only preferred embodiment of the present utility model, and it is not all.Based on the embodiment in embodiment, Those skilled in the art obtain other embodiment on the premise of creative work is not made, and belong to of the present utility model Protection domain.

In the following description, occur the indicating position such as term " interior ", " outer ", " on ", " under ", "left", "right" or Position relationship is that, based on orientation shown in the drawings or position relationship, description embodiment merely for convenience is described with simplified, and It is not instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, because This is it is not intended that to limitation of the present utility model.

Embodiment 1

As shown in Figures 1 to 4, it is machine head of embroidery machine in the present embodiment, it includes needle bar frame 1, and needle bar frame 1 is provided with shank Component, shank component includes shank 10, presser feet 2, and the bottom of shank 10 is provided with pin folder 103, and presser feet 2 includes pressing plate 20, the body of rod 21 And restorer, restorer is preferably back-moving spring 22 in the present embodiment, and pin folder 103 and pressing plate 20, can not shown in Fig. 1 to 3 Referring in Fig. 5, shank 10 and presser feet 2 can be reciprocating relative to needle bar frame, and machine head of embroidery machine also includes driving in addition Case 30 and the first driver being located in driving box 30, the first driver include the first cam 31, and the first cam 31 is in the first electricity Realize and rotate under the driving of machine, so as to drive shank 10 to make straight reciprocating motion, the first motor not shown in Fig. 1 to 3, it is necessary to Illustrate, Fig. 1 is into Fig. 3, in order to simplify expression, a shank 10 and a set of presser feet 2 are only illustrated on needle bar frame 1, it is real In the product of border, laid out in parallel has some bar shanks 10 and some set presser feets 2 on needle bar frame 1.

In traditional machine head of embroidery machine, the motion of shank 10 and presser feet 2 is all linkage, is not separated from each other, in sewing rank Section is also that shank 10 gos up to drive presser feet 2 to go up in this way, the descent tape dynamic pressure pin 2 of shank 10 declines.So, in order to reduce shank 10 load, the reciprocating motion of the linear reciprocation of shank 10 and presser feet 2 should be realized be separated from each other in theory, i.e. shank 10 The separate operation of reciprocating motion with presser feet 2 is moved back and forth, mutually non-interference, so both are in motion, suffered load Also separate, after so designing, the first driver undertakes the loads of presser feet 2 when driving shank 10 in motion without whole, So as to effectively reduce load suffered when shank 10 is moved, on the premise of same driving force, it is ensured that shank 10 Movement velocity faster, so as to make lower pin number of times of the machine head of embroidery machine within the unit interval more, substantially increases machine head of embroidery machine Operating efficiency.If but the component of shank 10 and presser feet 2 are completely independent operation, needing two sets of drive systems to drive, this Sample can make it that part increases in driving box 30, increase the volume of machine head of embroidery machine, also accordingly add the cost of machine head of embroidery machine.

, should there is also the relation of linkage and shank 10 and presser feet 2 are not completely independent in actual motion in the present embodiment Interaction relation is main, and shank 10 can drive presser feet 2 to decline during decline during the decline of shank 10, realize linkage Effect, and during rise, shank 10 is gone up by the first driver in machine head of embroidery machine, and presser feet 2 is then Gone up by the restorer in presser feet 2, so both shank 10 and presser feet 2 are independent operatings during rise.

So design, for the first driver, the first driver only needs to provide the driving force of shank 10, it is not necessary to The driving force for replying presser feet 2 is undertaken, i.e., for traditional embroidery machine, the first driver only assume responsibility for portion in the present embodiment The load divided；

For the restorer of presser feet 2, it is only necessary to the active force for being supplied to presser feet 2 to reset, without to pressure Pin 2 provides lower pressure, therefore for presser feet 2, can be realized using simpler mechanism, such as can be using the thinner bullet of line footpath Spring can just be realized.Restorer in the present embodiment is exactly the spring for using line footpath thinner, such as and optional line footpath 0.2mm~ 0.4mm spring steel, and it is traditional to ensure stronger reset force, more than line footpath 0.6mm spring steel is selected substantially.

In addition, as shown in figure 5, it is the sewing stage that embroidery machine has one section in operation, the sewing stage refers to shank 10 in quilt It is first push after, the stage before complete return, shank 10 is moved back and forth at a high speed within the stage, in the present embodiment, in seam Thread in the stage, remained that avoids a gap H between the pressing plate 20 of presser feet and the pin folder 103 of shank, avoidance gap H exists It is the lateral clearance between axial clearance or pressing plate and the pin folder between pressing plate 20 and pin folder 103 in the present embodiment, this Embodiment shows axial clearance, and the embodiment of lateral clearance for details, reference can be made to embodiment 2, and it is mesh to set and avoid gap H Be in the sewing stage, not collide or hit between pin folder 103 and pressing plate 20.And be required in traditional embroidery machine Shank drives presser feet return, therefore will generally lean on pin to press from both sides the band dynamic pressure plate 20 of 103 collision pressing plate 20 and go up, such design, pressure Plate 20 will certainly produce load to pin folder 103, produce load equivalent to shank 10, be unfavorable for the high-speed motion of shank 10.And this In embodiment, the activity always of pin folder 103 is in the top of pressing plate 20, and pin presss from both sides power of not had an effect between 103 and pressing plate 20, divided completely From the interference that will not be collided during motion etc is also pulled without other connectors, so as to reduce pressing plate to the negative of shank 10 Carry power.

Last point, traditional machine head of embroidery machine, shank 10 needs to drive presser feet 2 to go up during rise, to realize pin Bar 10 and the effect of the synchronous rise of presser feet 2, once synchronous effect is bad, shank 10 can be collided and also returned when pushing next time Presser feet 2 during rising, such reverse shock obviously exacerbates the load to shank 10, therefore right in traditional machine head of embroidery machine Restorer in presser feet 2 requires higher, if restorer needs to carry using the thicker spring of line footpath using the spring for being For larger restoring force, the Rapid reset of presser feet 2 is allowed, and in the present embodiment, because shank 10 and presser feet 2 are independent rises, pin Bar 10 need not drive presser feet 2 to go up when ging up, and both need not realize accurate synchronous rise, to the restorer of presser feet 2 It is required that it is very low, it is exactly using the thinner back-moving spring 22 of line footpath, even if shank 10 is reversely hit when pushing in the present embodiment Hit, by the reaction force also very little of restorer, excessive load will not be produced to shank 10.

Specific structure：

Needle bar frame, shank, presser feet part：Needle bar frame 1 includes overhead gage 11, lower baffle plate 12, backboard 13, and overhead gage 11 is with It is set side by side with multiple needle bar holes 14 on baffle plate 12, shank 10 is penetrated out of overhead gage 11 needle bar hole 14 and from lower baffle plate 12 Stretched out in needle bar hole 14, and can be axially movable, the bottom of shank 10, which is installed with pin folder 103, lower baffle plate 12, is provided with pressure Pin hole 15, presser feet 2 includes pressing plate 20, the body of rod 21 and back-moving spring 22, and pressing plate 20 is located at the bottom of the body of rod 21, for compressing cloth Material, pressing plate 20 shown in the present embodiment is a surface plate, naturally it is also possible to be other structures, and back-moving spring 22 is set in the body of rod On 21, the body of rod 21 is inserted into presser feet hole 15, and lower baffle plate 12 is partly stretched out below the body of rod 21, and upper part is then stretched out in lower block The top of plate 12, the top of the body of rod 21 is provided with upper limit position block 211, and after being completed, back-moving spring 22 is then limited in upper limit position block Between 211 bottom surface and the top surface of lower baffle plate 12, to prevent the body of rod 21 from departing from from lower baffle plate 12, the body of rod 21 is close to bottom position Lower limit set 212 is provided with, reference can be made to shown in Fig. 2.In the present embodiment upper limit position block 211 can be with the one of the body of rod 21 into Type or individually it is fixed on the body of rod 21.

From the point of view of only with said structure, the reciprocating motion of shank 10 and the reciprocating motion of the body of rod 21 are independent operatings, mutually not Interference, and linked to allow shank 10 to be realized when pushing with the body of rod 21, presser feet drive block, presser feet driving are provided with shank 10 Block is with the oscilaltion of shank 10, and when shank 10 declines, presser feet drive block also accordingly declines, thus with the upper limit on the body of rod 21 Block 211 offsets and pushes the upper limit position block 211 of the body of rod 21, under realizing that shank 10 drives the body of rod 21 also during decline Drop.

For presser feet drive block, there can be a numerous embodiments, simplest is direct to utilize on shank 10 intrinsic the One retainer ring 101, because traditional machine head of embroidery machine, inherently carries the first retainer ring 101, first retainer ring on shank 10 101 by the first driver for being driven, and first retainer ring 101 can follow shank 10 to move up and down, it is possible to achieve under The effect of depression bar body 21.

And the present embodiment presser feet drive block uses another preferred scheme, realized using an extra retainer ring, i.e., Second retainer ring 102, the second retainer ring 102 is located at the lower section of the first retainer ring 101, and the second retainer ring 102 uses the knot of anchor ear Structure, is fixed on by way of bolt or fastened by screw on shank 10, when needed, can be unclamped bolt or screw, be allowed Second retainer ring 102 is slided on shank 10, it is possible to achieve axial location is adjusted, and can so adjust the starting that the body of rod 21 is pushed Time, voluntarily adjusted according to different operating modes.There is provided after adjustable second retainer ring 102, it is possible to without regulation the The axial location of one retainer ring 101.

In the present embodiment, in an initial condition, it is between existing initially between the second retainer ring 102 and upper limit position block 211 Gap, the primary clearance keeps for the second retainer ring 102 to do idle stroke, and the second retainer ring 102 is slipped down to from initial position Contact in this section of stroke of upper limit position block 211, shank 10 is independent operating, not by the active force of back-moving spring 22, i.e. shank 10 Load of the shank 10 during decline can not so be reduced in this section of stroke by the load effect of presser feet 2.

In order to allow presser feet 2 in reciprocatory movement it is more stable, the upper limit position block 211 in the present embodiment is to be set in shank It is that perforation is set on upper limit position block 211 specifically on 10, the diameter of perforation and the diameter of shank 10 Match somebody with somebody, upper limit position block 211 is set on shank 10 by perforation, such body of rod 21 is in lifting, and upper end coordinates with shank 10, close Lower part coordinates with the presser feet hole 15 on lower baffle plate 12, realizes that two ends are positioned, stability is more preferable.

Because shank 10 is cylindrical, the perforation on upper limit position block 211, the presser feet hole 15 on lower baffle plate 12 are circular holes, therefore The body of rod 21 can rotate in lifting, in order to prevent upper limit position block 211 from rotating, and the present embodiment also includes being used to prevent institute State in the guide frame that upper limit position block 211 relatively rotates with the shank 10, the present embodiment and set on the backboard 13 of needle bar frame 1 There are some guide grooves 131, guide groove 131 is that traditional machine head of embroidery machine has, it acts on primarily serving and fixed to first The guide effect of ring 101, prevents it from rotating, and the first retainer ring 101 is convexly equipped with side projection 1011 in side, and side projection 1011 is being led Slided into groove 131, in the present embodiment, the guide groove 131 similarly can for being oriented to upper limit position block 211, referring to Fig. 3 and Fig. 4, the profile of upper limit position block 211 is in " convex " shape, and width small end 2111 is stretched into guide groove 131, the larger end of width 2112 are fitted on the side of backboard 13, so design, and upper limit position block 211 is only realized in guide groove 131 and slided up and down, and Rotation or double swerve can not be realized, the design of "convex" shaped can also meet not front and rear rock.Certain this area passes through this implementation The design of example is also readily apparent that the shape of upper limit position block 211 is not limited to be arranged to "convex" shaped, can also be in upper limit Chute is set on the side wall of block 211, allows guide groove 131 to be embedded in chute.

First driver portion：As mentioned above, the first driver in the present embodiment includes being located in driving box 30 Fixing axle 32, the axial direction of fixing axle 32 is parallel with the axial direction of shank 10, and driving sliding block 33 is set in fixing axle 32, The first cam 31 is rotatably connected in driving box 30, the first cam 31 drives the driving sliding block 33 by second connecting rod mechanism Pump, second connecting rod mechanism is the shank linkage in traditional embroidery machine, do not make excessive elaboration, drive sliding block 33 Side be convexly equipped with projection 331, coordinate to realize driving pin by side projection 1011 in the retainer ring 101 of projection 331 and first Bar 10 moves up and down, and due to the first driver portion, is the technical scheme commonly used on existing machine head of embroidery machine, does not make excessively to explain State.

The present embodiment is additionally arranged one in driving box 30 and keeps the body of rod 21 to be in pressed status within the sewing stage Lock.The pressed status of the body of rod 21 referred herein, refers to that the body of rod 21 does not return to the state of initial position, bar after pushing When body 21 is under pressed status, back-moving spring 22 is to be in compressive state.After the lock locking body of rod 21, the body of rod 21 can be allowed In the state being pressed down, shank 10 is followed to go up, so that when allowing the shank 10 to decline next time, the second retainer ring 102 is without again It is secondary to push upper limit position block 211.After lock locks presser feet 2, the motion of shank 10 is just completely in independent operating, with presser feet 2 Be kept completely separate, either decline process, or rise process, whole process is all independent operating, thus allow shank 10 load force more It is small, shank 10 can be allowed to run more at high speed.

Lock：As shown in Figure 6 and Figure 7, clamping block 4 has been rotatablely installed in fixing axle 32, clamping block 4 can be along fixing axle 32 axis centre is circumferentially rotated, and block is set on the body of rod 21, when the body of rod 21 drops to predeterminated position, the clamping block 4 turn to block top is risen with limit stop, and after clamping block 4 turns an angle, clamping block 4 leaves above block, Just position-limiting action will not be realized to block, the body of rod 21 may return to original state position.Using the rotational characteristic of clamping block 4 come real Now to the spacing of the body of rod 21 and clearance, compact conformation, small volume nor affects on the motion of other parts.

Specifically, it is exactly the upper limit to further improve the block on the compactedness of structure, the body of rod 21 in the present embodiment Position block 211, upper limit position block 211 stretches out the part of guide groove 131, can used as block, and the side of clamping block 4 is then convex Provided with locking projections 40, locking projections 40 turn to the top of upper limit position block 211, spacing to realize.Certainly in other embodiment In, block can be the parts being individually fixed on the body of rod 21.

Clamping block 4 is driven to rotate by the second driver in the present embodiment, the second driver includes first connecting rod mechanism, Sliding piece 44 laterally is extended with the side wall of clamping block 4, when there is active force perpendicular acting on sliding piece 44, the meeting of sliding piece 44 The unitary rotation of clamping block 4 is driven, the first connecting rod mechanism includes first connecting rod 51, second connecting rod 52, third connecting rod 53, first The one end of connecting rod 51 is hinged on driving box 30, and driving sliding block 33 side wall drives sliding block 33 when moving up provided with post 332 is pushed away, First connecting rod 51 can be promoted by pushing away the inclined-plane of post 332, and one end of the other end and second connecting rod 52 of first connecting rod 51 is hinged, and second connects The other end of bar 52 is hinged with third connecting rod 53, and the other end of third connecting rod 53 is connected with driving lever 54 in driving lever 54, the present embodiment To be rotatably connected on the roller of the end of third connecting rod 53, third connecting rod 53 is provided with Rotational Cylindrical 531 in the centre position of two ends, Rotational Cylindrical 531 is hinged with driving box 30, and Rotational Cylindrical 531 can be used as a fulcrum rotated.

When first connecting rod 51, which is pushed away post 332, to be promoted, first connecting rod 51 is rotated, and pulls second connecting rod 52, second connecting rod 52 When pulled, third connecting rod 53 is pulled, third connecting rod 53 when pulled, can be rotated with Rotational Cylindrical 531 for fulcrum, so that Driving lever 54 is allowed to touch sliding piece 44, so as to realize that driving clamping block 4 is rotated.

Because in first connecting rod mechanism, first connecting rod 51, third connecting rod 53 are required for being rotatably installed on driving box 30, position It is fixed to put, and the pilot hole on driving box 30 there may be error, or first connecting rod 51 in processing from processing When the factor such as be deformed, many times first connecting rod mechanism is installed to the content of driving box 30 and is also easy to produce the phenomenon, this reality such as stuck Apply in order to avoid this kind of situation in example, second connecting rod 52 is provided with mounting hole 521 in the junction with first connecting rod 51, utilizes waist Shape hole 521, can adjust the link position of first connecting rod 51 and second connecting rod 52, even there is mismachining tolerance or assembling is missed Difference, can also be made up using mounting hole 521 these error bands come influence.

When embroidery machine complete machine works, cloth is roving, only cloth under few cases in most cases It need not move, therefore during actual motion, when shank 10 gos up in the operating condition, the body of rod 21 also will accordingly be realized micro Go up, to allow cloth to realize translation, fluctuated to allow the body of rod 21 to be realized under pressed status, also include using in the present embodiment In the clamping block drive mechanism for driving the clamping block 4 to fluctuate, clamping block drive mechanism can drive clamping block 4 along admittedly The axial direction of dead axle 32 carries out short-distance movement, defines the axial location of clamping block 4, that is, define the body of rod 21 under Float cap position under pressure condition.

So, the operation of the body of rod 21 in the present embodiment includes several stages：

First stage：Upper limit position block 211 by the second retainer ring 102 when not hit, and the body of rod 21 is in initial position；

Second stage：Upper limit position block 211 is pressed down to behind precalculated position, and locked block 4 is locked, and the body of rod 21, which is maintained at, to be pushed State, i.e. back-moving spring 22 are to be in confined state；

Phase III：On the premise of the body of rod 21 keeps pressed status, clamping block 4 is certainly in the drive of clamping block drive mechanism Fluctuated under dynamic, clamping block 4 fluctuates, and the body of rod 21 follows clamping block 4 to fluctuate in the presence of back-moving spring 22, But initial position will not be gone back up to, the stage is the sewing stage of machine head of embroidery machine；

Fourth stage：After the sewing stage terminates, when shank 10 gos up completely, clamping block 4 loses pair after turning an angle The body of rod 21 it is spacing, the body of rod 21 returns to the initial position of first stage in the presence of back-moving spring 22.

The concrete structure of clamping block drive mechanism, clamping block drive mechanism is also the 3rd driver in the present embodiment, bag The second cam 61, rocking bar 62 are included, the second cam 61 is rotated coaxially with the first cam 31, rocking bar 62 includes the first rocking bar 621 With the second rocking bar 622, the first rocking bar 621 and the second rocking bar 622 intersect V-shaped, the first rocking bar 621 and the phase of the first rocking bar 621 It is rotatably connected at friendship on driving box 30, the first rocking bar 621 is driven by the second cam 61, clamping block 4 includes buoyancy body 41 and solid Determine body 42, the locking projection 331 is arranged in buoyancy body 41, fixed body 42 by axial limiting in fixing axle 32, Zhi Nengyan Fixing axle 32 is circumferentially rotated, and can not be moved axially, and axial floating can then occur relative to fixed body 42 for buoyancy body 41, this U-lag is provided with embodiment in the middle of buoyancy body 41, fixed body 42 is contained in U-lag, the end face of fixed body 42 and U-lag It is provided between wall on short spring 43, the side wall of buoyancy body 41 and is convexly equipped with floating supports block 411, during 62 Integral swinging of rocking bar, second The end of rocking bar 622 props up floating supports block 411 so that relative to fixed body 42 relative displacement occurs for buoyancy body 41, so as to realize The axial movement of buoyancy body 41, that is, realize clamping block 4 referred to above and fluctuate.Operation principle can be found in Fig. 8, Fig. 8 Be exactly apart from L clamping block 4 floating stroke, dotted portion is that the second cam is rotated clockwise after certain angle, rocking bar 62, the The schematic diagram of two cams 61.

Due to shank 10 from extreme lower position go up when, the upward active force of cloth can be applied to, preferable situation should be Shank 10 allows presser feet 2 to be still pressed on cloth in the moment of rise, and delay is gone up, when after the rise a trip of shank 10, presser feet 2 realize rise again, i.e., the initial time that described clamping block 4 floats upwards is later than the initial time that the shank 10 gos up upwards. It is to allow shank 10 in the moment of rise that the purpose so designed, which is, and presser feet 2 can allow shank 10 also in cloth state is compressed It is unlikely to cloth to take up in pull-up moment, it is linear slit can be allowed closer, while the cloth after having embroidered is also more smooth.

Delay design：As shown in Figure 9, Q1 is the driving salient point of the first cam 31 in figure, drives salient point in the present embodiment Refer to the part with respect to protrusion in all sides of cam, for realizing eccentric drive, Q2 is the driving salient point of the second cam 61, In the present embodiment, Q1 and Q2 mutual dislocations are set, and Q1 to the center of circle O line and Q2 have angle between center of circle O line Difference, when the first cam 31 and the second cam 61 are all to rotate counterclockwise, Q2 will postpone to turn to same position in Q1 all the time, this Sample can be achieved with when Q1 driving sliding block 33 begin to ramp up when, Q2 be not driven into also rocking bar 62, i.e. clamping block 4 also not on It is floating.The effect of delay is completed with the differential seat angle of two driving salient points.

In addition, the end of the second rocking bar 622 is provided with adjusting screw 63 in the present embodiment, the is adjusted by adjusting screw 63 The distance between the end of two rocking bars 622 and clamping block 4.The distance between end and clamping block 4 of rocking bar 62 are adjusted, purpose exists In the initial axial location of regulation clamping block 4, the purpose of this regulation is, the thickness of cloth has difference, regulation clamping block 4 Initial axial location, helps to adjust the compression degree of presser feet 2 and cloth.

The operation principle of whole machine head of embroidery machine is as follows：

The first step, shank 10, presser feet 2 are all in initial position；

Second step, the first electric motor starting rotates the first cam 31, and shank 10 starts to enter in the presence of the first driver Row is first to be declined, and the second retainer ring 102 on shank 10 strikes the upper limit position block 211 on the body of rod 21；

3rd step, shank 10, the body of rod 21 decline together, during decline, and the post 332 that pushes away on driving sliding block 33 bumps against first Connecting rod 51, stirs clamping block 4 and rotates, and avoids the body of rod 21, allows presser feet 2 to be pressed onto on cloth, the first decline stage of shank 10 is basic Terminate；

4th step, the return of clamping block 4, the locked body of rod 21 makes it keep pressed status, does not go back up to initial position, embroiders Machine head enters the sewing stage；

5th step, shank 10 gos up within the sewing stage, the step in rise refer to rise under working condition, no Refer to go back up in initial position, and this section, because the reciprocating stroke of shank 10 is shorter, driving sliding block 33 push away post 332 will not First connecting rod 51 is struck, interior during this work, the second cam 61 also drives clamping block 4 to fluctuate simultaneously, and presence is prolonged Shi Xiaoying；

6th step, after the sewing stage terminates, shank 10 gos up completely, now drives pushing away post 332 and can hit on sliding block 33 First connecting rod 51, so as to allow clamping block 4 to rotate again, loses to the spacing of the body of rod 21, allows the body of rod 21 to be returned to original state.

Embodiment 2

As shown in Figure 10, the difference in the present embodiment with embodiment 1 is, the avoidance gap in the present embodiment is acupressure probe Lateral clearance between 20 and pin folder 103, Figure 10 is the cross sectional view of pressing plate 20, and the present embodiment center platen 20, which is provided with, supplies pin The via 201 that bar 10 is passed through, the aperture of the via 201 is more than the external diameter that pin presss from both sides 103 so that pin folder 103 is in oscilaltion process In will not with pressing plate 20 produce collision, so that power will not be acted to shank 10.

Embodiment 3

As shown in figure 11, the present embodiment and the difference of embodiment 1 are, the structure of the present embodiment center platen 20 area Not, the pressing plate 20 in the present embodiment includes top board 202 and lower platen 203, with connection between top board 202 and lower platen 203 Plate is connected, and top board 202, connecting plate, lower platen 203 are integrative-structures when actual production is manufactured, and can be realized with continuous bending, The pressing plate 20 of an entirety is formed, in the present embodiment, pin folder 103 is between top board 202 and lower platen 203, and is implemented Described avoidance gap H in example, also includes upper axial clearance H1 and lower axial clearance H2 in the present embodiment.Entirely sewing Stage, pin folder 103 is movable between top board 202 and lower platen 203, exists all the time between top board 202, lower platen 203 Gap, so as to ensure that pressing plate 20 is overall when ging up, will not occur load effect, this pressing plate 20 of the present embodiment with pin folder 103 Structure, bending strength is more preferable.

Embodiment 4

As shown in figure 12, the present embodiment, with embodiment 3 than relatively similar, is also the pressure using top board 202 and lower platen 203 Hardened structure, and the avoidance gap H in the present embodiment then includes lateral clearance and axial clearance, i.e., being provided with top board 202 Hole 201, the bore of the via 201 is more than the external diameter that pin presss from both sides 103, and pin folder 103 can be passed through from top board 202, while in pin Folder 103 is also provided with axial clearance H2 with lower platen 203, to ensure power of being had an effect between pin folder 103 and lower platen 203.This Sample design can allow the movement travel of pin folder 103 longer, be not limited between top board 202 and lower platen 203, extend to pin Between bridge and lower platen 203.

Embodiment 5

As shown in figure 13, the present embodiment and the difference of embodiment 1 are that lock is otherwise varied, are driven in the present embodiment First connecting rod 51 is not driving sliding block, but has been separately provided second motor 35, and the rotation of first connecting rod 51 is by second Motor 35 drives, so that the rotation of clamping block 4 be realized by motor driving, the driving of second motor 35 is then by control electricity Road is controlled.

Embodiment 6

As shown in figure 14, the present embodiment and the difference of embodiment 1 are that lock is otherwise varied, are driven in the present embodiment First connecting rod 51 is not driving sliding block, but has been separately provided an electromagnet 36, and electromagnet 36 is connected with fourth link 55, The other end connection driving lever 54 of fourth link 55, the centre position of fourth link 55 is hinged on driving box 30, and electromagnet 36 leads to Contraction can be produced when electricity, power-off, so as to pull fourth link 55, fourth link 55 can stir 4 turns of clamping block when pulled Dynamic, so that the rotation of clamping block 4 be driven by electromagnet 36, energization, the power-off of electromagnet 36 are then carried out by control circuit Control.

Embodiment 7

The present embodiment and the difference of embodiment 1 are that locking block drive is different, and clamping block drives in the present embodiment Device includes the 3rd motor and third connecting rod mechanism, and third connecting rod mechanism is connected with the clamping block, in the present embodiment, by the 3rd Motor drives clamping block to fluctuate by third connecting rod mechanism, i.e., be separated from each other with needle bar driver, by the 3rd motor list Solely driving, and the effect being delayed, can be realized using control circuit, that is, control circuit to connect the first motor and the 3rd motor, The startup time difference of the first motor and the 3rd motor is controlled with control circuit, to realize the effect of delay.

The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, and is familiar with The those skilled in the art should be understood that the present invention includes but is not limited to accompanying drawing and interior described in embodiment above Hold.The modification of any function and structure principle without departing from the present invention is intended to be included in the scope of claims.

Claims (8)

1. a kind of more efficient machine head of embroidery machine, including needle bar frame, shank and presser feet, the shank and presser feet are relative to described Needle bar frame is reciprocating, it is characterised in that the machine head of embroidery machine also includes the fixing axle for being located at presser feet side, the fixation The clamping block for the spacing presser feet lifting is rotatablely equipped with axle, the clamping block is connected with the 3rd driver, described Three drivers drive the clamping block to be moved along the fixing axle axial reciprocating.

2. more efficient machine head of embroidery machine as claimed in claim 1, it is characterised in that the clamping block include fixed body and Buoyancy body, the fixed body in the fixing axle, is provided with short spring, institute by axial limiting between the buoyancy body and fixed body Buoyancy body is stated to be connected with the 3rd driver.

3. more efficient machine head of embroidery machine as claimed in claim 2, it is characterised in that U-shaped is provided with the middle of the buoyancy body Groove, fixed body is contained in U-lag, and the short spring is provided between the wall of the end face of fixed body and the U-lag.

4. more efficient machine head of embroidery machine as claimed in claim 2, it is characterised in that the 3rd driver includes second It is convexly equipped with floating supports block on cam and rocking bar, the side wall of the buoyancy body, described rocking bar one end is by second actuated by cams, separately One end offsets with the floating supports block.

5. more efficient machine head of embroidery machine as claimed in claim 4, it is characterised in that the machine head of embroidery machine also includes using In driving reciprocating first driver of shank, first driver includes the first cam, first cam and Second cam coaxial is fixed.

6. more efficient machine head of embroidery machine as claimed in claim 5, it is characterised in that close to clamping block in the rocking bar One end is provided with adjusting screw, and the distance between end and floating supports block of rocking bar are adjusted by adjusting screw.

7. more efficient machine head of embroidery machine as claimed in claim 1, it is characterised in that the 3rd driver includes the 3rd Motor, the 3rd motor drives the clamping block to move back and forth by third connecting rod mechanism.

8. more efficient machine head of embroidery machine as claimed in claim 1, it is characterised in that the machine head of embroidery machine also includes multiple Position spring, when the shank declines, the back-moving spring is compressed, by the elastic force of the back-moving spring when presser feet gos up Realize.