CN205741533U - The transfer device that shank moves up and down - Google Patents

Abstract

This utility model relates to the transfer device that a kind of shank moves up and down, and comprises transmission member and coupling member, and transmission member has a perforate penetrated for needle bar of sewing machine, and is driven by shank driving handle and produce upper and lower displacement；Coupling member has and wears fixing connecting portion for shank again, and keeps contacting with transmission member, coupling member be collectively forming the ball joint that can produce relative offset movement with transmission member.When main shaft orders about the operating of shank driving handle, shank will only be transmitted the thrust of up and down motion by transfer device effect, it is prevented from other lateral forces in the swing mechanism of shank, it is to avoid sewing machine precision under high-speed sewing declines, and can effectively simplify the structure of transfer device.

Description

The transfer device that shank moves up and down

Technical field

This utility model relates to a kind of button holing sewing machine allowing shank swing and to move up and down, particularly a kind of The transfer device of side force can be alleviated when shank swing process moves up and down.

Background technology

The shank motion of existing eyelet buttonhole sewing machine, except having the up and down motion of general sewing machine, must also have concurrently Having the oscillating motion rotated with horizontal direction, the oscillation center of shank is disposed on the generally end of shank, Can be supported on up and down on machine frame, needle swinging mechanism is set in the bottom of shank, drive shank lower end to make The swing of horizontal direction；And connect at the pars intermedia of shank and have a needle bar frame, accept to rotate, from main shaft, the pin driven Pole crank drives needle bar frame to move up and down.

When button holing sewing machine drive shaft rotates, the crank that the toggle-action lever that can be driven by needle bar crank is constituted Transfer device makes shank move up and down, and needle swinging mechanism carries out wobbling action simultaneously so that be placed on feeding Cloth on platform can form the tortuous stitching of round end keyhole.

One known lockstitch button holder as disclosed in Chinese invention patent notification number CN1824872, its biography that moves up and down Delivery device is by yoke-like component, the first fulcrum, annular component, the second fulcrum and a pair needle bar frame component institute Constituting, wherein, yoke-like component, by the first fulcrum with shank horizontal quadrature, is rotatably supported at shank On crank；Annular component has the space formed by ring-type inner peripheral surface, and by the outer peripheral face of shank with ring-type Guarantee between the inner peripheral surface of component that there is the gap swung；Additionally, the second fulcrum will be orthogonal to first Axle and the axle center of shank so that annular component is rotating to be supported on yoke-like component；Last by two shanks Frame member is fixed on the outside of shank, and is configured at the upper and lower both sides of annular component.

Utility model content

For solving described technical problem, main purpose of the present utility model is to provide on a kind of needle bar of sewing machine The transfer device of lower motion, allows shank while carrying out oscillating motion and moving up and down, it is possible to prevent it His lateral forces, in needle bar swinging mechanism, effectively simplifies the structure of transfer device, it is to avoid the meander line of sewing Mark distortion.

For reaching object defined above, this utility model transfer device is mainly installed in sewing machine by an oscillating machine The shank that structure drives, and described transfer device is another and a shank driving handle assembles and interlocks, and described shank drives Axle, by the main shaft drives of sewing machine, makes described transfer device be driven grip strip by Tong Bu by described shank with shank Move and move up and down.

The most described transfer device comprises transmission member and coupling member, and described transmission member has perforate allows institute State shank to penetrate, and be connected with described shank driving handle so that described transmission member can be by described shank Driving handle drives and produces upper and lower displacement；And described coupling member has and wears fixing connection for described shank Portion, and keep contacting with described transmission member, it is collectively forming can be produced by described coupling member and transmission member The ball joint of raw relative offset movement, uses the structure simplifying transfer device, and then can reduce sewing machine Manufacturing cost.

Wherein, the open pore size of described transmission member, more than the external diameter of described shank, makes the periphery of described shank A swing gap is formed between the inner peripheral surface of face and described perforate.

In the first preferred embodiment, described transmission member is configured to a spheroid, and described coupling member structure Make a spherical spaces formed by upper and lower two needle bar frames, enable described spheroid to be located in described spherical sky Relative spheric motion is made between.

Additionally, described transmission member comprises two spaced hemisphere faces and is arranged at described two hemispheres An annulus between face, described two hemispheres face can be with described when being limited by described two needle bar frames Annulus produces relative horizontal displacement.The most described annulus is respectively equipped with sleeve in position, two opposite sides, and Described two sleeve pipes connect pin bank by one respectively and are installed on described shank driving handle.

Described needle bar frame is formed with half bulbous recess in the position of neighbouring described transmission member, and away from institute The position stating transmission member is formed with a locking part；The most described locking part comprises the lock ring circle of formation two jig arm And one be arranged in described two jig arm to change the screw of described lock ring circle internal diameter size.

When described shank by needle swinging mechanism drive when swinging, the hemispherical groove of described needle bar frame along with Described shank synchronizes to carry out beat inclination, and the hemisphere face of described transmission member does not tilts with described shank, Only offseting with shank, this will result in and produces relative spherical rotation between described hemispherical groove and hemisphere face, Meanwhile, described hemisphere face is supported by described hemispherical groove, causes described hemisphere face and annulus Between produce the skew of relative horizontal direction.

In the second preferred embodiment, described transmission member is configured with a spherical spaces, and described coupling member Being configured to a spheroid, described spheroid can be located in described spherical spaces makees relative spheric motion.

Described transmission member comprises a connection frame and two and collectively forms the hemispherical recessed cup of described spherical spaces, Described connection frame is formed with the receiving space of a described coupling member of receiving；The spherical recessed cup of described two halves is arranged at In described receiving space, and lay respectively at the opposite sides of described coupling member；Wherein, described two halves are spherical Recessed cup can produce relative displacement with the described frame that is connected when by described coupling member beat effect.

The most described connection frame is respectively formed with perforate in upper/lower terminal, and is respectively formed with in arranged on left and right sides One pivoted hole, and described two pivoted holes respectively by one connect pin bank be installed on described shank driving handle.

In a possible embodiments, described coupling member is made up of single spheroid, and described single spheroid has There is a location division connect for bolt group, enable described single spheroid to be locked in outside described shank；In separately In one possible embodiments, described coupling member comprises two hemispheres collectively forming described spheroid and at least One by described two halves spheroid locking spiro connecting piece outside described shank.

In addition, described transfer device comprises a guide mechanism further, and described guide mechanism is installed on institute State inside sewing machine, and there is the guide rails of at least one cooperation described transmission member installing, make described transmission Component is limited by described guide rails and is carried out the upper and lower displacement of vertical direction.

In a possible embodiments, described guide mechanism comprises one first support and one second support, described First support and the second support lay respectively at the opposite sides of described transmission member, and described first support has The most several linking arms, and at least one support shaft of described second support it is installed on by the most several described linking arms.

Compared with prior art, the utility model has the advantage of of described technical scheme is used: by by passing Passing component coordinates two needle bar frames to form transfer device, and can form 360 between transmission member and two needle bar frames The ball joint that degree swings, thereby allows transfer device when driving shank to move up and down, it is possible to prevent it His lateral forces is in the swing mechanism of shank, it is to avoid sewing machine disturbs shank to swing under high-speed sewing state Amount, and then affect the size precision decline of shank amplitude of fluctuation.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of this utility model sewing machine head；

Fig. 2 is the axonometric chart of the transfer device that the internal shank of this utility model sewing machine moves up and down；

Fig. 3 is the sectional drawing of AA line segment in Fig. 2；

Fig. 4 is the exploded view of the transfer device that this utility model shank moves up and down；

Fig. 5 is transmission member and the exploded view of needle bar frame in Fig. 4；

Fig. 6 is what this utility model needle bar mechanism carried out moving up and down schematic diagram；

Fig. 7 A to 7B is the schematic diagram that this utility model needle bar mechanism carries out oscillating stroke；

Fig. 8 is the axonometric chart of this utility model sewing machine transfer device the second embodiment；

Fig. 9 is the sectional drawing of BB line segment in Fig. 8；

Figure 10 is the exploded view of this utility model transfer device the second embodiment；

Figure 11 A to 11B is the schematic diagram that this utility model the second embodiment carries out oscillating stroke.

Description of reference numerals: 10-sewing machine；11-shank；12-main shaft；13-shank supports platform；14-pin pendulum machine Structure；15-cam；16-shank driving handle；161-connecting portion；20-transfer device；21-transmission member；211- Hemisphere face；211a-perforate；212-annulus；212a-perforate；213-spheroid；214-sleeve pipe；215- Connect pin bank；216-slide block；217-swings gap；218-connects frame；218a-accommodates space；218b-perforate； 218c-pivoted hole；The hemispherical recessed cup of 219-；219a-perforate；210-connecting pin；22-coupling member 221-shank Frame；222-connecting portion；223-locking part；The hemispherical groove of 224-；225-lock ring circle；226-jig arm；227- Screw；228-spheroid；229-location division；220-bolt；23-guide mechanism；231-guide rails；232- First support；233-the second support；234-linking arm；235-support shaft.

Detailed description of the invention

This utility model, advantage of the present utility model is further described below in conjunction with specific embodiments and the drawings With feature will be with describe and apparent.

Referring to Fig. 1, this utility model button holing sewing machine 10 is internally installed shank 11 and a main shaft 12, wherein, the upper top of described shank 11 is provided with a shank being assembled in sewing machine 10 casing and supports platform 13, And the bottom of described shank 11 is provided with one by the needle swinging mechanism 14 driving motor (not shown) to drive.

Referring to shown in Fig. 2 and Fig. 3, described main shaft 12 one end connects a cam 15, and by described cam 15 another shaft core positions being located parallel to described main shaft 12 axle center connect a shank driving handle 16, described Shank driving handle 16 has a connecting portion 161 extended along horizontal direction, and is pacified by described connecting portion 161 Fill a transfer device 20 being connected with described shank 11.

Referring to shown in Fig. 4 and Fig. 5, this utility model transfer device 20 includes a transmission member 21, Coupling member 22 and a guide mechanism 23, in the first preferred embodiment, described transmission member 21 has Two spaced hemisphere faces 211 and are arranged at the annulus between described two hemispheres face 211 212, and it is collectively configured to a spheroid 213 by described two hemispheres face 211 with annulus 212, and described Two hemispheres face 211 all penetrates direction along described shank 11 with annulus 212 and is respectively formed with a perforate 211a, 212a penetrate for described shank 11, and the most described annulus 212 is respectively equipped with one in position, two opposite sides Sleeve pipe 214, and described two sleeve pipes 214 respectively by one connection pin bank 215 be installed on described shank driving handle 16 so that described transmission member 21 can coordinate described shank driving handle 16 to synchronize upper and lower displacement, and institute State connection pin bank 215 to be additionally provided with a described guide mechanism of cooperation 23 and limit the slide block 216 of the direction of motion.

In feasible embodiment, the aperture of described plural number perforate 211a, 212a must be more than described shank 11 External diameter, make, between the outer peripheral face of described shank 11 and the inner peripheral surface of each perforate 211a, 212a, all there is foot Enough swing gaps 217；Wherein, the gap between described shank 11 and perforate 211a is for allowing described shank Stepping down of 11 deflection angles, the gap between described shank 11 and perforate 212a is inclined for allowing described shank 11 Swinging is stepped down plus horizontal shift, and the most in actual use, the aperture of described perforate 212a need to be opened by ratio The aperture of hole 211a is big.

Referring again to shown in Fig. 4 and Fig. 5, this utility model coupling member 22 is designed as two intervals and is fixed on institute Stating the needle bar frame 221 of shank 11 outer surface, described two needle bar frames 221 are adjacent to described transmission member respectively 21 tops and the opposite sides of bottom, wherein, described needle bar frame 22 penetrates direction along described shank 11 It is provided with the connecting portion 222 of a formation perforation pattern, and described needle bar frame 22 is in away from described transmission member 21 Position forms a locking part 223, and is formed with half bulbous recess in the position of adjacent described transmission member 21 224。

In graphic possible embodiments, the hemispherical groove 224 of described two needle bar frames 22 will collectively form one Spherical spaces accommodates the spheroid 213 of described transmission member 21 so that described spheroid 213 can be in institute State and spherical spaces is made relative spheric motion, use and allow described two needle bar frames 22 with transmission member 21 three altogether With forming a ball joint, the structure that can reach transfer device 20 simplifies, and then can reduce the manufacture of sewing machine Cost.

Furthermore, the lock ring circle 225 and that described locking part 226 comprises formation two jig arm 226 is arranged in Described two jig arm 226 change the screw 227 of described lock ring circle 225 internal diameter size, allow the user can be quick Described needle bar frame 22 is installed, and is suitable for the abrasion of transmission member 21, convenient adjust described two needle bar frames 22 Combinational gap with described transmission member 21；Additionally, described locking part 223 also can be hemispherical recessed with described Groove 224 links into an integrated entity, and can simplify the number of components further.

Referring again to shown in Fig. 1 and Fig. 4, this utility model guide mechanism 23 has at least one described cunning of cooperation The guide rails 231 of block 216 installing, as it can be seen, this utility model guide rails 231 is above-below direction Extend the limit sliding chutes forming a linearity, limit described slide block 216 and be only capable of carrying out the upper bottom of vertical direction Move, thereby can bear the side force produced when shank driving handle 16 promotes described annulus 212 to move up and down, Avoid the swing of this side force interference shank 11.

In a possible embodiments, described guide mechanism 23 has the phase laying respectively at described transmission member 21 The first support 232 and one second support 233 to both sides, described first support 232 in upper top and is gone to the bottom Two side positions of end form the linking arm 234 of corresponding described connecting portion 161 length respectively, and described second Frame 233 is then provided with the support shaft 235 that a corresponding described linking arm 234 assembles respectively at upper top and lower bottom, And be installed on described sewing machine 10 by described support shaft 235.

Refer to shown in Fig. 6, when described main shaft 12 order about described shank driving handle 16 operate time, described biography Delivery device 20 is driven by described shank driving handle 16 and moves up and down, owing to described shank 11 is with described Shank driving handle 16 connects, and therefore, described shank 11 will synchronize produce with described transfer device 20 and transport up and down Dynamic.

Refer to shown in Fig. 7 A and Fig. 7 B, additionally, described needle swinging mechanism 14 can be at described transfer device 20 While moving up and down, described shank 11 is driven to carry out the oscillating motion of a horizontal direction, so Button holing sewing machine is allowed to produce the stitching of complications on sewing cloth.

When described shank 11 is driven when carrying out swing state by described needle swinging mechanism 14, described needle bar frame 22 Hemispherical groove 223 synchronize beat along with described shank 11, and the hemisphere of described transmission member 21 Face 211 does not tilts with described shank 11, only offsets with shank 11, and this will result in described hemispherical Relative spherical rotation is produced between groove 224 with hemisphere face 211；Two hemispheres face 211 is subject to simultaneously The restriction of two halves bulbous recess 224 is supported, and produces between described hemisphere face 211 and annulus 212 except allowing Raw relative horizontal direction skew, also can be maintained at concentric sphere knot at any time by described two hemispheres face 211 Structure；Finally, described two needle bar frames 221 will promoted two hemispheres face 211 by described annulus about 212 Vertical displacement can be produced during effect.

Refer to shown in Fig. 8 to Figure 10, in the second preferred embodiment, this utility model transmission member 21 It is designed with a connection frame 218 substantially presenting square pattern and the spherical recessed cup 219 of two halves, wherein, described company Connect frame 218 and be centrally formed the receiving space 218a of a described coupling member of receiving 22, and at upper/lower terminal It is respectively formed with the perforate 218b of a described shank of receiving 11, is separately respectively formed with a pivot joint in arranged on left and right sides Hole 218c, and described two pivoted hole 218c are installed on described shank driving handle by a connecting pin 210 groups respectively 16。

The spherical recessed cup 219 of the most described two halves all has a perforate 219a, and is located at described receiving space 218a In, the opposite sides laying respectively at described coupling member 22 constitutes a spherical spaces, and described two halves are spherical Recessed cup 219 is when by the beat effect of described coupling member 22, it is possible to produce phase with the described frame 218 that is connected To displacement.

It addition, described coupling member 22 be designed as one can be contained in described spherical spaces make relative sphere fortune Dynamic spheroid 228, in a graphic preferred embodiment, described coupling member 22 is by single spheroid 228 Constituting, described single spheroid 228 has a location division 229 connect for 220 groups of bolt, makes described single ball Shape body 228 can be locked in outside described shank 11.

In another possible embodiments, described coupling member 22 also can comprise two and collectively form described spheroid 228 Hemisphere and at least one by described two halves spheroid locking spiro connecting piece outside described shank 11, (figure is not Show).But, this is only used with for convenience of illustrating, and is not in a limitative way the structure of described coupling member 22 Pattern.

Refer to shown in Figure 11 A and Figure 11 B, when described shank 11 is driven by described needle swinging mechanism 14 During row swing state, the spheroid 228 of described coupling member 22 will incline along with described shank 11 synchronizes beat Tiltedly, and the connection frame 218 of described transmission member 21 does not carries out beat with described shank 11, and this will result in institute State generation between the spherical recessed cup 219 of two halves and the spheroid of described coupling member 22 of transmission member 21 relative Spherical rotation；Allow the spherical recessed cup 219 of described two halves simultaneously and produce relative level with connecting between frame 218 Direction offsets so that the spherical spaces that the spherical recessed cup 219 of described two halves is constituted is maintained at concentric pattern；? After, when described spheroid 228 will be promoted the spherical recessed cup 219 of described two halves to act on by described connection frame 218, Can synchronize to produce the displacement of vertical direction.

Above explanation and embodiment are only exemplary, scope of the present utility model are not constituted any limit System.It will be understood by those skilled in the art that can under without departing from spirit and scope of the present utility model Details and form to technical solutions of the utility model are modified or replace, but these amendments and replacement all fall Enter in protection domain of the present utility model.

Claims (12)

1. the transfer device that shank moves up and down, is installed in sewing machine the pin driven by needle swinging mechanism Bar, and move up and down with the shank driving handle gearing being connected to main shaft, comprise:

Transmission member, has the perforate penetrated for described shank, and is connected to described shank driving handle, be subject to Described shank driving handle drives and produces upper and lower displacement；

Coupling member, has and wears fixing connecting portion for described shank, and keep connecing with described transmission member Touch；

It is characterized in that: described coupling member is collectively forming with transmission member and can produce the motion of relative beat Ball joint.

The transfer device that shank the most according to claim 1 moves up and down, it is characterised in that: described transmission The open pore size of component, more than the external diameter of described shank, makes the outer peripheral face of described shank and the inner circumferential of described perforate A swing gap is formed between face.

The transfer device that shank the most according to claim 1 moves up and down, it is characterised in that: described transmission Component is configured to a spheroid, and described coupling member is configured with a spherical spaces, enables described spheroid It is located in described spherical spaces and makees relative spheric motion.

The transfer device that shank the most according to claim 3 moves up and down, it is characterised in that: described transmission It is one ring-type that component comprises that two spaced hemisphere faces and are arranged between described two hemispheres face Portion, described two hemispheres face can produce phase with described annulus when by described coupling member beat effect To displacement.

The transfer device that shank the most according to claim 4 moves up and down, it is characterised in that: described ring-type Portion is respectively equipped with sleeve in position, two opposite sides, and described two sleeve pipes connect pin bank by one respectively and are installed on Described shank driving handle.

The transfer device that shank the most according to claim 3 moves up and down, it is characterised in that: described link Component comprises two needle bar frames being adjacent to described transmission member opposite sides respectively, and described needle bar frame is in neighbouring institute The position stating transmission member is formed with half bulbous recess, and is formed in the position away from described transmission member One locking part.

The transfer device that shank the most according to claim 1 moves up and down, it is characterised in that: described transmission Component is configured with a spherical spaces, and described coupling member is configured to a spheroid, and described spheroid can hold It is located in described spherical spaces and makees relative spheric motion.

The transfer device that shank the most according to claim 7 moves up and down, it is characterised in that: described transmission Component comprises:

One connects frame, is formed with the receiving space of a described coupling member of receiving；

The spherical recessed cup of two halves, is arranged in described receiving space, and lays respectively at the relative of described coupling member Both sides；

Wherein, the spherical recessed cup of described two halves can be connected with described when by described coupling member beat effect Frame produces relative displacement.

The transfer device that shank the most according to claim 8 moves up and down, it is characterised in that: described connection Frame is respectively formed with the perforate accommodating described shank at upper/lower terminal, and is respectively formed with in arranged on left and right sides One pivoted hole, and described two pivoted holes respectively by one connect pin bank be installed on described shank driving handle.

The transfer device that shank the most according to claim 7 moves up and down, it is characterised in that: described company Structural member is made up of single spheroid, and described single spheroid has a location division connect for bolt group, makes institute State single spheroid can be locked in outside described shank.

The transfer device that 11. shanks according to claim 1 move up and down, it is characterised in that: described biography Delivery device comprises a guide mechanism further, and described guide mechanism is installed on inside described sewing machine, and has At least one guide rails coordinating the installing of described transmission member, makes described transmission member by described guide rails Limit and carry out the upper and lower displacement of vertical direction.

The transfer device that 12. shanks according to claim 11 move up and down, it is characterised in that lead described in: Drawing mechanism and comprise one first support and one second support, described first support and the second support lay respectively at institute State the opposite sides of transmission member, and described first support has the most several linking arm, and by described the most several Linking arm is installed at least one support shaft of described second support.