CN207331238U - A kind of route-variable sewing machine rocker structure - Google Patents

Abstract

The utility model discloses a kind of route-variable sewing machine rocker structure,Belong to sewing machine field,Solve the problems, such as that the change of pin platform stroke is inconvenient,Its key points of the technical solution are that include the upper axis of sewing machine rocking arm internal rotating,Pin platform and rocking arm frame,The upper axis is rotationally connected with rocking arm frame,The pin platform is arranged in rocking arm frame vertically,The pin platform coordinates with rocking arm frame in sliding,Spring is arranged with the pin platform,The spring upper end is fixedly connected on pin platform upper end,The lower spring end contacts at rocking arm frame inner wall,The upper axle position is arranged with multiple mounted cam above pin platform,The multiple mounted cam is sheathed on axis and radially fixed circumferential sliding coordinates,The multiple mounted cam and pin platform upper surface are inconsistent,The multiple mounted cam includes at least two different size of cams,The rocking arm frame is equipped with the plectrum structure that controllable multiple mounted cam moves horizontally,The utility model is rational in infrastructure,The effect of convenience change pin platform stroke is reached.

Description

A kind of route-variable sewing machine rocker structure

Technical field

A kind of sewing machine is the utility model is related to, more specifically, it relates to a kind of route-variable sewing machine rocker structure.

Background technology

Sewing machine is with one or more sewing thread, and one or more stitchings are formed on sewing, make one or more layers seam The machine that material interweaves or unites by a seam.Producing and a kind of mechanical equipment common in life.Sewing such as leather equal thickness is thicker The thick thing of sewing piece used with the thin thing of the stroke of sewing machine machine syringe needle compared to sewing pieces such as the clothes of sewing thinner thickness The stroke of syringe needle in sewing machine machine is longer.Moreover, the shift motion of line jump device can be set as benchmark.Also thick thing is used The length that the toggle-action lever and line of sewing machine jump device is longer compared with thin thing sewing machine, and it is that will reach the standard grade to lead to before penetrating pin that line, which jumps device, The ring crossed, has the function of the pulling force for adjusting line, but the driving principle of Liang Zhong mechanisms is identical with running not to have difference, so two Kind machine can be combined into a sewing machine, be allowed to that the thicker sewing piece of thickness can be sewed or sew thinner thickness seam Thread thing.

At present, the Chinese invention patent of Publication No. CN106471172A discloses a kind of sewing machine machine and can change and turn Changing device, it is included by substituting the toggle-action lever on the upper axis of sewing machine, the replacement for changing the lifting track of pin platform Toggle-action lever；The replacement line for the travel path that lifting track with substituting toggle-action lever is interactive and generation is variable jumps device, so that, pass through tune Markingoff pin platform lifts track and line jumps the motion track of device stroke, can change or change the machine of sewing machine.

But original toggle-action lever and line are jumped device dismounting by above-mentioned technical proposal, it is necessary to by after disassembling shell, will be substituted afterwards bent Shank and replacement line jump device and are installed on sewing machine, put in back shell, complete the change of sewing machine machine, reach its pin platform stroke Change.Such operation needs manually dismounting, complicated, and the change of pin platform stroke is inconvenient.

Utility model content

In view of the deficienciess of the prior art, the utility model lies in that provide a kind of route-variable sewing machine rocker structure, Achieve the purpose that convenience changes pin platform stroke.

To achieve the above object, the utility model provides following technical solution：A kind of route-variable sewing machine rocking arm knot Structure, including rocking arm frame, be rotationally connected with rocking arm frame upper axis and the vertical pin platform for being arranged in rocking arm frame, the pin Platform coordinates with rocking arm frame in sliding, is arranged with pin platform spring on the pin platform, the pin platform spring upper end is fixedly connected on pin Platform upper end, the pin platform lower spring end contact at rocking arm frame inner wall, and the upper axle position is equipped with multiple mounted cam, institute above pin platform State multiple mounted cam and be sheathed on axis and axial slip is radially fixed with upper axis and coordinate, the multiple mounted cam and pin platform upper surface phase Contradict, the multiple mounted cam includes at least two different size of cams, and the rocking arm frame is equipped with controllable multiple mounted cam water The dynamic plectrum structure of translation.

By using above-mentioned technical proposal, because of the effect of pin platform spring force, make pin platform upper surface all the time with multiple mounted cam Contradict, multiple mounted cam is rotated with upper axis, and pin platform is subject to the thrust of multiple mounted cam and the pressure of pin platform spring, makes pin platform vertical Reciprocatingly slide on direction, make pin platform drive sewing needle to move back and forth up and down and have the function that sewing；It is with different size of cam Pin platform provides different trips, reaches the effect of different machines；Multiple mounted cam is moved horizontally using plectrum structure, makes pin platform top The cam of different rises is contradicted, it is easy to operate easy to use to realize the effect for not having to dismounting and can reaching conversion stroke.

The utility model is further arranged to：The multiple mounted cam includes the first cam and the second cam, and described first is convex Wheel is with the second cam in being coaxially disposed, and first radius of cam base-circle is less than the base radius of the second cam, and described first is convex One end of wheel and the second cam protrusion is concordant.

By using above-mentioned technical proposal, when cam protruding end is inconsistent in pin platform, pin platform is located at the maximum of its stroke End, when the basic circle of cam is inconsistent with pin platform, pin platform is located at the smallest end of its stroke；Because the protruding end of two cams is concordant, So the most big end of the stroke of pin platform is the same, and the basic circle of the first cam is less than the basic circle of the second cam, and pin platform contacts at first The pin platform of the smallest end of stroke when the pin platform of the smallest end of stroke during cam highly contacts at the second cam higher than pin platform is high Degree, therefore when pin platform contacts at the first cam, the stroke bigger of pin platform, and the most significant end higher that pin platform slides up and down, can To sew thicker sewing piece；Pin platform and the maximum height that the second cam contradicts are small, and stroke is shorter, can sew relatively thin sewing Thing.Because the protruding end of two cams is concordant, when pin platform is located at the bottom of its stroke, Convex Composite can be stirred by plectrum structure Wheel, makes multiple mounted cam slide axially relative to upper axis, changes the cam that pin platform is contradicted.

The utility model is further arranged to：The upper axis outer wall is equipped with external splines, and the multiple mounted cam is equipped with endoporus, institute Multiple mounted cam inner hole wall is stated equipped with the multiple mounted cam being more than with the matched internal spline of external splines, the external splines axial length Width.

By using above-mentioned technical proposal, multiple mounted cam is realized by spline and sliding axially for upper axis is radially fixed, And the space necessarily slided is provided for multiple mounted cam.

The utility model is further arranged to：One end that the upper axis wears multiple mounted cam is equipped with the shaft shoulder, the shaft shoulder with External splines is connected, and the external splines opposite side is fixedly connected with restraining position ring block.

By using above-mentioned technical proposal, with the shaft shoulder and the horizontal space slided of spacing ring limitation multiple mounted cam, prevent multiple The external splines that slips away when cam is horizontal to be slided is closed, causes rocker structure not work.

The utility model is further arranged to：The plectrum structure include the confinement block that axially moves of limitation multiple mounted cam and It is articulated with the pull rod of the one end of confinement block away from multiple mounted cam, the pull rod is equipped with close to one end of confinement block to be used for and confinement block Hinged hinge hole, the pull rod and rocking arm frame are set in rotation connection, and it is wide more than pull rod that the rocking arm frame is equipped with width The sliding eye of degree, the one end of the pull rod away from confinement block are extended to outside rocking arm frame through sliding eye.

By using above-mentioned technical proposal, using pull rod as lever, using the center of rotation of pull rod and rocking arm frame as fulcrum, put Dynamic pull rod moves horizontally confinement block by lever principle, while confinement block drives multiple mounted cam to be moved axially relative to upper axis, Make different cams and pin platform inconsistent, reach the effect of change machine；Slide hole width makes pull rod opposite more than pull rod width When frame member, interference when certain rotation space avoids pull rod rotation with rocking arm frame is provided for pull rod.

The utility model is further arranged to：The confinement block is U-shaped piece, and the multiple mounted cam is placed in U-shaped piece of U-lag Interior, described U-shaped piece is placed on axis, is equipped with two plane bearings in the U-lag, the plane bearing is placed on axis, described Plane bearing one end is fixedly connected with the side wall of multiple mounted cam, and the plane bearing other end is fixedly connected with U-lag inner wall, institute It is waist-shaped hole to state hinge hole.

By using above-mentioned technical proposal, plane bearing is added therebetween, and U-shaped piece and multiple mounted cam are rotated and connected Connect, and reduce frictional force between the two；Make making multiple mounted cam axially slide by U-shaped piece, U-shaped piece is sheathed on axis, Circumferentially it is uniformly distributed centered on the horizontal thrust above axis applied to multiple mounted cam, avoids axis side to multiple mounted cam applying power Multiple mounted cam is deflected trend so as to cause frictional force between the two to increase, multiple mounted cam is more smoothly slided； Pull rod is rotated by center of rotation of rotation axis, and movement locus of the pull rod close to U-shaped piece one end is circular arc, in order to avoid interfering U Type block follows multiple mounted cam axially to move linearly, so hinge hole is arranged to gain.

The utility model is further arranged to：The sliding eye is circumferentially with regulating tank, is equipped with the regulating tank some Depression, one end that the pull rod stretches out rocking arm frame are equipped with adjusting block, and the adjusting block coordinates with pull rod in sliding, the adjusting Block is equipped with the protrusion being adapted to depression close to one end end face of regulating tank.

By using above-mentioned technical proposal, it is adapted to by the protrusion on adjusting block with the depression in regulating tank with secured adjusted Block, so that steady brace, and then fixed confinement block is avoided when rocker structure works, Convex Composite skidding with fixing multiple mounted cam Move and influence rocker structure work；When needing to change machine, pull-up adjusting block, swings pull rod, makes multiple mounted cam is horizontal to slide, Adjusting block is pressed again afterwards and is coordinated raised with depression, pins the position of pull rod.

The utility model is further arranged to：Described adjusting block one end is hinged with first connecting rod, and the pull rod stretches out rocking arm Frame one end is hinged with second connecting rod, and the one end of the first connecting rod away from adjusting block is articulated with the middle part of second connecting rod, and described the Pull-rod spring is fixedly connected between two connecting rods and pull rod.

By using above-mentioned technical proposal, second connecting rod is swung, second connecting rod is pulled first connecting rod, draws first connecting rod Dynamic adjusting block is slided relative to pull rod, convenient to pull adjusting block；Spring is fixedly connected between second connecting rod and pull rod, utilizes bullet The spring extruding second connecting rod of spring, makes second connecting rod extrude first connecting rod, makes first connecting rod squeeze adjustments block, avoid adjusting block Upper protrusion can not pin pull rod from depression disengaging.

The utility model is further arranged to：Jumper wire device is further included, described jumper wire device one end is with rocking arm frame in rotation Connection, the jumper wire device other end are extended to outside rocking arm frame, and wire jumper connecting rod, the wire jumper connecting rod are equipped with the middle part of the jumper wire device It is slidably connected close to one end of jumper wire device with jumper wire device, the wire jumper connecting rod coordinates with rocking arm frame in sliding, and the wire jumper connects Bar lower end and multiple mounted cam are inconsistent, and wire jumper spring, the wire jumper spring upper end and rocking arm frame are arranged with the wire jumper connecting rod Frame is inconsistent, and the wire jumper lower spring end is fixedly connected on wire jumper connecting rod lower end.

By using above-mentioned technical proposal, because of the effect of spring force, make wire jumper connecting rod lower end surface all the time with Convex Composite Wheel contradicts, and multiple mounted cam is rotated with upper axis, and connecting rod is subject to the thrust of multiple mounted cam and the pressure of spring, makes wire jumper connecting rod perpendicular Nogata reciprocatingly slides upwards, makes wire jumper connecting rod drive jumper wire device up and down reciprocatingly to swing and has the function that bracing wire；With different rises Cam provides different trips for connecting rod, and to provide the line of different length, because connecting rod is located at the top of pin platform, pull rod is supported with pin platform Same cam is touched, adaptable line is provided for different machines.

The utility model is further arranged to：The pin platform upper end is rotatably connected to roller, the center of rotation of the roller Line is parallel with upper axis, and the roller and multiple mounted cam are inconsistent.

By using above-mentioned technical proposal, the friction of multiple mounted cam and pin platform upper end is changed into rolling from sliding friction and is rubbed Wipe, reduce the frictional force between multiple mounted cam and pin platform.

In conclusion the utility model has the advantages that：Can not have to dismounting can change pin platform stroke, tie Structure simple and stable, and with locking device make it is more safe and reliable.

Brief description of the drawings

Fig. 1 is the structure diagram of embodiment；

Fig. 2 is the exploded perspective view of embodiment；

Fig. 3 is the structure diagram of plectrum structure；

Fig. 4 is the structure diagram of adjusting block.

Reference numeral：1st, rocking arm frame；11st, regulating tank；111st, it is recessed；12nd, sliding eye；13rd, wire jumper groove；2nd, sewing knot Structure；21st, multiple mounted cam；211st, the first cam；212nd, the second cam；213rd, internal spline；214th, endoporus；22nd, pin platform；221st, roll Wheel；222nd, bulge loop；223rd, pin platform spring；3rd, jumper wire construction；31st, wire jumper connecting rod；311st, boss；312nd, wire jumper spring；32nd, wire jumper Device；321st, sliding groove；33rd, first support bar；34th, second support bar；341st, guide sleeve；4th, plectrum structure；41st, U-shaped piece；42nd, put down Spherical bearing；43rd, pull rod；431st, rotation axis；432nd, card slot；433rd, hinge hole；44th, adjusting block；441st, it is raised；442nd, fixing axle； 45th, first connecting rod；46th, second connecting rod；47th, pull-rod spring；5th, upper axis；51st, external splines；52nd, the shaft shoulder；53rd, spacing ring.

Embodiment

The utility model is described in further detail below in conjunction with attached drawing.

The same or similar label correspond to the same or similar components in the attached drawing of the utility model embodiment；In this practicality In new description, it is to be understood that if thering is the orientation of the instructions such as term " on ", " under ", "left", "right" or the position relationship to be Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore retouched in attached drawing State the term of position relationship only for illustration, it is impossible to the limitation to this patent is interpreted as, for the common skill of this area For art personnel, the concrete meaning of above-mentioned term can be understood as the case may be.

A kind of route-variable sewing machine rocker structure, as illustrated in fig. 1 and 2, including is rotationally connected with upper inside sewing machine Axis 5, the sewing structure 2 for providing displacement for sewing needle and for both fixed rocking arm frames 1, wherein upper axis 5 is rotated and connected It is connected to rocking arm frame 1.

Sewing structure 2 includes being used for the pin platform 22 for installing sewing needle and the Convex Composite to pump for the offer of pin platform 22 Wheel 21, the upper end of wherein pin platform 22 contacts at 21 lower face of multiple mounted cam；Pin platform 22 is presented lower sliding with rocking arm frame 1 and is coordinated, 22 upper end of pin platform is rotatably connected to roller 221, and 221 center of rotation of roller is parallel with upper axis 5, roller 221 and multiple mounted cam 21 to Contradict；Pin platform spring 223 is arranged with pin platform 22, the bulge loop 222 that upper end and the pin platform 22 of pin platform spring 223 are equipped with is inconsistent, The lower end of pin platform spring 223 and rocking arm frame 1 are inconsistent, using the elastic force of pin platform spring 223 make pin platform 22 all the time with Convex Composite Wheel 21 contradicts, and multiple mounted cam 21 provides the power to bottom offset for pin platform 22, and pin platform spring 223 provides what is shifted up for pin platform 22 Power.

Multiple mounted cam 21 is connected to axis 5, and 21 inner hole wall of multiple mounted cam offers internal spline 213, upper axis 5 and multiple mounted cam 21 junctions are equipped with the external splines 51 being adapted to internal spline 213, and thus, upper axis 5 drives multiple mounted cam 21 to rotate, and Convex Composite Wheel 21 can slide axially relative to upper axis 5.Upper axis 5 is located at the right side of external splines 51（Referring to Fig. 2）Equipped with the shaft shoulder 52, upper axis 5 is located at The left side of external splines 51（Referring to Fig. 2）Restraining position ring block 53 is threadedly coupled, the shaft shoulder 52 and spacing ring 53 are used to limit multiple mounted cam 21 The axial distance of slip, avoids multiple mounted cam 21 from skidding off external splines 51 and makes axis 5 can not be that multiple mounted cam 21 provides radial direction turn Power, it also avoid multiple mounted cam 21 misplace with pin platform 22 and can not be inconsistent.

Multiple mounted cam 21 includes the first cam 211 and the second cam 212, and the first cam 211 is with the second cam 212 in coaxial Set and be integrally formed.First cam, 211 base radius is less than the base radius of the second cam 212, and 211 He of the first cam The top of second cam 212 protrusion is concordant, so sets the displacement for making two cams provide different trips for pin platform 22, and Two cams make the highly consistent of the minimum point of 22 displacement of pin platform, but the first cam 211 makes the peak of 22 displacement of pin platform Highly 22 displacement of pin platform is obtained the height of peak higher than the second cam 212, make height that sewing needle lifts also higher, can stitch Thread thicker sewing piece；Can sew thicker sewing piece when contradicting pin platform 22 using the first cam 211, use the second cam Can sew relatively thin sewing piece during 212 conflict pin platform 22.

The rocker structure further comprises jumper wire construction 3, include for sewing thread is provided for sewing needle jumper wire device 32, with And upper end and jumper wire device 32 are in the wire jumper connecting rod 31 being slidably connected, for installing the first support bar 33 of jumper wire device 32 and for pacifying The second support bar 34 of wire jumper connecting rod 31 is filled, 34 one end of second support bar is fixedly connected on rocking arm frame 1, and jumper wire device 32 is sheathed on The one end of second support bar 34 away from rocking arm frame 1, jumper wire device 32 are remote in rotation connection, jumper wire device 32 with second support bar 34 One end of second support bar 34 is extended to outside rocking arm frame 1, and rocking arm frame 1 opens up the wire jumper groove 13 passed through for jumper wire device 32, is jumped Wire casing 13 is in the strip being vertically arranged, and the space for determining rotation is provided for jumper wire device 32；33 one end of first support bar, which is fixed, to be connected Rocking arm frame 1 is connected to, first support bar 33 is fixedly connected with guide sleeve 341 away from 1 one end of rocking arm frame, and guide sleeve 341 is placed on jump Line connecting rod 31 simultaneously presents lower sliding cooperation with wire jumper connecting rod 31.31 top of wire jumper connecting rod is fixedly connected with sliding axle, and sliding axle is worn Jumper wire device 32 is crossed, jumper wire device 32 is equipped with the sliding groove 321 that smooth moving axis slides that supplies water, and 31 lower end of wire jumper connecting rod is equipped with boss 311, 311 lower end of boss and the upper end of multiple mounted cam 21 are inconsistent, and wire jumper spring 312, wire jumper spring 312 are arranged with wire jumper connecting rod 31 Lower end and boss 311 it is inconsistent, the upper end of wire jumper spring 312 and guide sleeve 341 are inconsistent.

Because of the effect of 312 elastic force of wire jumper spring, 31 lower end surface of wire jumper connecting rod is set to be contradicted all the time with multiple mounted cam 21, it is compound Cam 21 provides upward thrust for wire jumper connecting rod 31, and wire jumper spring 312 provides downward thrust for wire jumper connecting rod 31, when compound Cam 21 is rotated with upper axis 5, and wire jumper connecting rod 31 is made wire jumper connecting rod by the reciprocating thrust force of wire jumper spring 312 and multiple mounted cam 21 31 in the vertical directions reciprocatingly slide.Wire jumper connecting rod 31 drives jumper wire device 32, jumper wire device 32 is stretched out 1 one end of rocking arm frame with the Two supporting rods 34 do up and down reciprocatingly oscillating motion for the center of circle, have the function that bracing wire, and required sewing thread is provided for sewing needle；With Different size of cam provides different trips for wire jumper connecting rod 31, and different amplitudes of fluctuation is provided for jumper wire device 32, to provide not The sewing thread of same length；Wire jumper connecting rod 31 is located at the top of pin platform 22, and wire jumper connecting rod 31 contradicts same cam with pin platform 22, should Setting be in order to when 22 stroke of pin platform is larger, make the stroke of wire jumper connecting rod 31 also larger, the amplitude of fluctuation of jumper wire device 32 also compared with Greatly, the sewing thread added is provided for sewing needle；When 22 stroke of pin platform is smaller, make the stroke of wire jumper connecting rod 31 also smaller, wire jumper The amplitude of fluctuation of device 32 is also smaller, is provided for sewing needle and adds few sewing thread, and the sewing thread of appropriate amount is provided for sewing needle.

As shown in Figures 2 and 3, which further comprises the plectrum structure for controlling 21 horizontal displacement of multiple mounted cam 4, plectrum structure 4 includes U-shaped piece 41 be connected with cam and with U-shaped piece 41 in the pull rod 43 hingedly set, wherein U-shaped piece 41 It is placed on axis 5 and is not contacted with upper axis 5, multiple mounted cam 21 is placed in U-shaped piece 41 of U-type groove, 21 both sides of multiple mounted cam point Plane bearing 42 is not fixedly connected with, and the other end of plane bearing 42, in being fixedly connected, makes multiple mounted cam 21 with U-type groove inner wall With U-shaped piece 41 in rotation connection, and plane bearing 42 reduces the frictional force between multiple mounted cam 21 and U-shaped piece 41.

Pull rod 43 is rotationally connected with rocking arm frame 1 by rotation axis 431, when pull rod 43 is rotated relative to rocking arm frame 1, draws Bar 43 is that center of rotation rotates with rotation axis 431 close to U-shaped piece 41 one end, interferes U-shaped piece 41 to slide axially in order to prevent, It is waist-shaped hole by pull rod 43 and U-shaped piece of 41 hinged hinge holes 433, rocking arm frame 1 offers sliding eye 12, and 43 one end of pull rod is worn Sliding eye 12 is crossed to extend outside rocking arm frame 1.

As shown in Figure 3 and Figure 4, one end that pull rod 43 is stretched out outside rocking arm frame 1 is arranged with adjusting block 44, and adjusting block 44 can phase Slided for pull rod 43.Card slot 432 is offered on pull rod 43, adjusting block 44 is equipped with fixing axle 442, and fixing axle 442 passes through card Groove 432.Adjusting block 44 is more stablized, slided on pull rod 43 more smooth.

Rocking arm frame 1 is located at the regulating tank 11 for circumferentially offering at sliding eye 12 and horizontally slipping for adjusting block 44, regulating tank Two groups of depressions 111 are equipped with 11, every group of depression 111 includes two with the symmetrical depression 111 of sliding eye 12；Adjusting block 44 is close to be shaken It is two that 1 one end end face of arm frame, which is equipped with 111 protrusion 441 that be adapted tos of depression, raised 441, two protrusions 441 respectively with one group Two depressions 111 in depression 111 are adapted.When adjusting block 44 slides into right end, two protrusions 441 are placed in the one of right side Group is recessed in 111, U-shaped at this time piece 41 left side that multiple mounted cam 21 is slided into 51 track of external splines, pin platform 22 and wire jumper connecting rod 31 all connections contact at the second cam 212；When adjusting block 44 slides into left end, two protrusions 441 are placed in one group of left side In depression 111, U-shaped at this time piece 41 right side that multiple mounted cam 21 is slided into 51 track of external splines, pin platform 22 and wire jumper connecting rod 31 All connection contacts at the first cam 211, and it is to can utilize plectrum structure 4 solid after multiple mounted cam 21 is adjusted so to set Determine the axial location of multiple mounted cam 21, avoid multiple mounted cam 21 to move and required stroke can not be obtained when sewing machine works.

Two first connecting rods 45 are hinged with adjusting block 44, first connecting rod 45 is hingedly connected to adjusting block 44 away from rocking arm frame One end end face of frame 1, and two first connecting rods 45 are symmetrical set with pull rod 43.Two first connecting rods 45 are away from adjusting block 44 One end be all articulated with the middle part of second connecting rod 46, second connecting rod 46 is tilted relative to pull rod 43, and second connecting rod 46 is close to pull rod 43 one end is articulated with pull rod 43, and second connecting rod 46 is fixedly connected with pull-rod spring between one end and pull rod 43 away from pull rod 43 47.Apply the power of the side away from pull rod 43 to the one end of second connecting rod 46 away from pull rod 43 using the elastic force of pull-rod spring 47, Second connecting rod 46 drives 45 squeeze adjustments block 44 of first connecting rod, the protrusion 441 on adjusting block 44 is coordinated with depression 111 and more steps up It is close, avoid 44 non-artificial wish of adjusting block and protrusion 441 is deviate from from depression 111, so as to avoid adjusting block 44 in work Slip in work.Second connecting rod 46 is rotated, the one end of second connecting rod 46 away from pull rod 43 close to pull rod 43 and is extruded into pull rod bullet Spring 47, second connecting rod 46 pull first connecting rod 45, first connecting rod 45 pull adjusting block 44, by the protrusion 441 on adjusting block 44 from Pull-up in depression 111, facilitates the rotation of pull rod 43.

Concrete operations mode：During original state, the deviation of pull rod 43 right side, adjusting block 44 is located at the right side of regulating tank 11, raised 441 are adapted to one group of depression 111 on right side, and multiple mounted cam 21 is located at the left side of external splines 51.At this time, pin platform 22 contacts at second The lower section of cam 212, connecting rod contact at the top of the second cam 212, and the second cam 212 carries for jumper wire construction and pin platform 22 at this time For stroke, the stroke provided of the second cam 212 is smaller relative to the stroke provided of the first cam 211,22 He of pin platform The displacement of wire jumper connecting rod 31 is smaller, is adapted to the relatively thin sewing piece of sewing.By the one end of second connecting rod 46 away from pull rod 43 to phase Pull rod 43 is close and extrudes pull-rod spring 47, while second connecting rod 46 pulls first connecting rod 45, and first connecting rod 45 pulls adjusting block 44, protrusion 441 is pulled out from depression 111, adjusting block 44 is slided in regulating tank 11.Rotating tension bar 43, makes pull rod 43 Rotated centered on rotation axis 431 and deflected to the left, one end that pull rod 43 connects U-shaped piece 41 drives U-shaped piece 41 to move right, U-shaped Block 41 drives multiple mounted cam 21 to be moved to close to one end of the shaft shoulder 52.This hour hands platform 22 and wire jumper connecting rod 31 all contradict and first is convex Take turns 211 inconsistent, the first cam 211 provides larger stroke for pin platform 22 and wire jumper connecting rod 31, is adapted to the thicker sewing of sewing Thing.

This specific embodiment is only explanation to the utility model, it is not the limitation to the utility model, ability Field technique personnel as needed can make the present embodiment the modification of no creative contribution after this specification is read, but As long as all protected in the right of the utility model be subject to Patent Law.

Claims (10)

1. a kind of route-variable sewing machine rocker structure, including rocking arm frame（1）, be rotationally connected with rocking arm frame（1）Upper axis （5）And it is arranged in rocking arm frame vertically（1）Pin platform（22）, the pin platform（22）With rocking arm frame（1）Coordinate in sliding, It is characterized in that：The pin platform（22）On be arranged with pin platform spring（223）, the pin platform spring（223）Upper end is fixedly connected on pin Platform（22）Upper end, the pin platform spring（223）Lower end contacts at rocking arm frame（1）Inner wall, the upper axis（5）Positioned at pin platform（22） Top is equipped with multiple mounted cam（21）, the multiple mounted cam（21）It is sheathed on axis（5）And with upper axis（5）It is radially fixed axial sliding Move and coordinate, the multiple mounted cam（21）With pin platform（22）Upper surface is inconsistent, the multiple mounted cam（21）Including at least two not With the cam of size, the rocking arm frame（1）Equipped with controllable multiple mounted cam（21）The plectrum structure moved horizontally（4）.

2. a kind of route-variable sewing machine rocker structure according to claim 1, it is characterized in that：The multiple mounted cam（21） Including the first cam（211）With the second cam（212）, first cam（211）With the second cam（212）In being coaxially disposed, First cam（211）Base radius is less than the second cam（212）Base radius, first cam（211）With second Cam（212）One end of protrusion is concordant.

3. a kind of route-variable sewing machine rocker structure according to claim 1, it is characterized in that：The upper axis（5）Outer wall Equipped with external splines（51）, the multiple mounted cam（21）Equipped with endoporus, the multiple mounted cam（21）Inner hole wall is equipped with and external splines （51）Matched internal spline（213）, the external splines（51）The multiple mounted cam that axial length is more than（21）Width.

4. a kind of route-variable sewing machine rocker structure according to claim 3, it is characterized in that：The upper axis（5）Wear Multiple mounted cam（21）One end be equipped with the shaft shoulder（52）, the shaft shoulder（52）With external splines（51）It is connected, the external splines（51） Opposite side is fixedly connected with restraining position ring block（53）.

5. a kind of route-variable sewing machine rocker structure according to claim 1, it is characterized in that：The plectrum structure（4） Including limiting multiple mounted cam（21）The confinement block of axial movement and confinement block is articulated with away from multiple mounted cam（21）One end drawing Bar（43）, the pull rod（43）It is equipped with close to one end of confinement block and is used for the hinge hole hinged with confinement block（433）, the pull rod （43）With rocking arm frame（1）Set in rotation connection, the rocking arm frame（1）It is more than the sliding eye of pull rod width equipped with width （12）, the pull rod（43）One end away from confinement block passes through sliding eye（12）Extend to rocking arm frame（1）Outside.

6. a kind of route-variable sewing machine rocker structure according to claim 5, it is characterized in that：The confinement block is U-shaped Block（41）, the multiple mounted cam（21）It is placed in U-shaped piece（41）U-lag in, described U-shaped piece（41）It is placed on axis（5）, the U Two plane bearings are equipped with shape groove（42）, the plane bearing（42）It is placed on axis（5）, the plane bearing（42）One end With multiple mounted cam（21）Side wall be fixedly connected, the plane bearing（42）The other end is fixedly connected with U-lag inner wall, the hinge Connect hole（433）For waist-shaped hole.

7. a kind of route-variable sewing machine rocker structure according to claim 6, it is characterized in that：The sliding eye（12）Week To equipped with regulating tank（11）, the regulating tank（11）It is interior to be equipped with some depressions（111）, the pull rod（43）Stretch out rocking arm frame （1）One end be equipped with adjusting block（44）, the adjusting block（44）With pull rod（43）Coordinate in sliding, the adjusting block（44）It is close Regulating tank（11）One end end face be equipped with and depression（111）The protrusion of adaptation（441）.

8. a kind of route-variable sewing machine rocker structure according to claim 7, it is characterized in that：The adjusting block（44）One End is hinged with first connecting rod（45）, the pull rod（43）Stretch out rocking arm frame（1）One end is hinged with second connecting rod（46）, described One connecting rod（45）Away from adjusting block（44）One end be articulated with second connecting rod（46）Middle part, the second connecting rod（46）With pull rod （43）Between be fixedly connected with pull-rod spring（47）.

9. a kind of route-variable sewing machine rocker structure according to claim 1, it is characterized in that：Jumper wire device is further included （32）, the jumper wire device（32）One end and rocking arm frame（1）In rotation connection, the jumper wire device（32）The other end extends to rocking arm Frame（1）Outside, the jumper wire device（32）Middle part is equipped with wire jumper connecting rod（31）, the wire jumper connecting rod（31）Close to jumper wire device（32）'s One end and jumper wire device（32）It is slidably connected, the wire jumper connecting rod（31）With rocking arm frame（1）Coordinate in sliding, the wire jumper connecting rod （31）Lower end and multiple mounted cam（21）It is inconsistent, the wire jumper connecting rod（31）On be arranged with wire jumper spring（312）, the wire jumper bullet Spring（312）Upper end and rocking arm frame（1）It is inconsistent, the wire jumper spring（312）Lower end is fixedly connected on wire jumper connecting rod（31）Under End.

10. a kind of route-variable sewing machine rocker structure according to claim 1, it is characterized in that：The pin platform（22）On End is rotatably connected to roller（221）, the roller（221）Rotary centerline and upper axis（5）It is parallel, the roller（221）With Multiple mounted cam（21）It is inconsistent.