CN107345343A - The transfer device that shank moves up and down - Google Patents

Abstract

The present invention relates to the transfer device that a kind of shank moves up and down, and comprising transmission member and coupling member, 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 again wears fixed connecting portion for shank, and keeps contacting with transmission member, and the ball joint that can produce relative offset movement is collectively forming by coupling member and transmission member.When main shaft drives shank driving handle to operate, shank will only be transmitted the thrust of up and down motion by transfer device effect, it can prevent other lateral forces from, in the swing mechanism of shank, avoiding sewing machine precision under high-speed sewing from declining, and can effectively simplify the construction of transfer device.

Description

The transfer device that shank moves up and down

Technical field

The present invention relates to a kind of button holing sewing machine for allowing shank to swing and move up and down, and particularly one kind is in pin Bar swing process can mitigate the transfer device of side force when being moved up and down.

Background technology

The shank motion of existing eyelet buttonhole sewing machine, except the up and down motion with general sewing machine, must also have concurrently There are rotation and the oscillating motion of horizontal direction, the oscillation center of shank is disposed on the substantially upper end of shank, It can be supported on up and down on machine frame, needle swinging mechanism is set in the bottom of shank, drives shank lower end to make The swing of horizontal direction；And the pars intermedia in shank is connected with needle bar frame, receive the pin from main shaft rotation driving Pole crank drives the needle bar frame to move up and down.

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

As disclosed in Chinese invention patent notification number CN1824872, it moves up and down passes lockstitch button holder known to one Delivery device is by yoke-like component, the first fulcrum, annular component, the second fulcrum and a pair of shank frame member institutes Form, wherein, yoke-like component is rotatably supported at shank by the first fulcrum with shank horizontal quadrature On crank；Annular component has the space formed by ring-type inner peripheral surface, and by the outer peripheral face and ring-type of shank Ensure that there is the gap of swing between the inner peripheral surface of component；In addition, the second fulcrum will be orthogonal to first The axle center of axle and shank so that annular component is rotatably supported on yoke-like component；Finally 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.

The content of the invention

To solve the technical problem, it is a primary object of the present invention to provide a kind of needle bar of sewing machine to transport up and down Dynamic transfer device, shank is allowed to prevent other sides while carrying out oscillating motion and moving up and down Needle bar swinging mechanism is acted on to power, effectively simplifies the construction of transfer device, avoids the tortuous stitching of sewing from losing Very.

For up to object defined above, transfer device of the present invention is mainly mounted in sewing machine by a swing mechanism band Dynamic shank, and the transfer device separately with a shank driving handle assemble interlock, and the shank drive shaft by To the main shaft drives of sewing machine, make the transfer device and shank by synchronous driven by the shank driving handle and Moved up and down.

The transfer device includes transmission member and coupling member again, and there is the transmission member perforate to allow institute State shank to penetrate, and be connected with the shank driving handle so that the transmission member can be by the shank Driving handle, which drives, produces upper and lower displacement；And there is the coupling member confession shank to wear fixed connection Portion, and keep contacting with the transmission member, it is collectively forming and can be produced with transmission member by the coupling member The ball joint of raw relative offset movement, uses the construction of simplified transfer device, and then can reduce sewing machine Manufacturing cost.

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

In the first preferred embodiment, the transmission member is configured to an orbicule, and the coupling member structure The spherical spaces formed by upper and lower two needle bar frame are made, the orbicule is located in the spherical sky Between middle make relative spheric motion.

In addition, the transmission member includes, two spaced hemisphere are facial and one is arranged at the two hemispheres An annulus between face, the two hemispheres face when being limited by two needle bar frame can with it is described Annulus produces relative horizontal displacement.The annulus is respectively equipped with sleeve in two opposite sides position again, and Two sleeve pipe is installed on the shank driving handle by a connection pin bank respectively.

The needle bar frame in the position of the neighbouring transmission member formed with a hemispherical groove, and away from institute The position of transmission member is stated formed with a locking part；The locking part includes a lock ring circle for forming two jig arm again And one be arranged in two jig arm to change the screw of the lock ring circle internal diameter size.

When the shank is driven by needle swinging mechanism to be swung, the hemispherical groove of the needle bar frame with The shank synchronously carries out beat inclination, and the hemisphere face of the transmission member does not tilt with the shank, Only being offset with shank, this will cause to produce relative spherical rotation between the hemispherical groove and hemisphere face, Meanwhile the hemisphere face is supported by the hemispherical groove, cause the hemisphere face and annulus Between produce relative horizontal direction skew.

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

The transmission member collectively forms the hemispherical recessed cup of the spherical spaces comprising a connection frame and two, The connection frame is formed with a receiving space for accommodating the coupling member；The spherical recessed cup of two halves is arranged at In the receiving space, and it is located at the opposite sides of the coupling member respectively；Wherein, the two halves are spherical Recessed cup can produce relative displacement when being acted on by the coupling member beat with the connection frame.

The connection frame is respectively formed with perforate in upper/lower terminal again, and is respectively formed with arranged on left and right sides One pivoted hole, and two pivoted hole is installed on the shank driving handle by a connection pin bank respectively.

In a possible embodiments, the coupling member is made up of single orbicule, the single orbicule tool There is a location division connect for bolt group, the single orbicule is locked on the outside of the shank；In another In one possible embodiments, the coupling member is comprising two hemispheres for collectively forming the orbicule and at least One spiro connecting piece that the two halves spheroid locks on the outside of the shank.

In addition, the transfer device further includes a guide mechanism, and the guide mechanism is installed on institute State inside sewing machine, and with least one guide rails for coordinating the transmission member installing, make the transmission Component is limited by the guide rails and carries out the upper and lower displacement of vertical direction.

In a possible embodiments, the guide mechanism includes a first support and a second support, described First support is located at the opposite sides of the transmission member with second support respectively, and the first support has More several linking arms, and it is installed on by more several linking arms an at least support shaft for the second support.

Compared with prior art, using the technical scheme the utility model has the advantage of：By by passing Passing component coordinates two needle bar frames to form transfer device, and 360 can be formed between transmission member and two needle bar frames The ball joint swung is spent, thereby allows transfer device to prevent it when driving shank to be moved up and down His lateral forces avoid sewing machine from disturbing shank to swing under high-speed sewing state in the swing mechanism of shank Amount, and then the size precision for influenceing shank amplitude of fluctuation declines.

Brief description of the drawings

Fig. 1 is the stereogram on sewing machine head of the present invention；

Fig. 2 is the stereogram of the transfer device that shank moves up and down inside sewing machine of the present invention；

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

Fig. 4 is the exploded view for the transfer device that shank of the present invention moves up and down；

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

Fig. 6 is the schematic diagram that needle bar mechanism of the present invention is moved up and down；

Fig. 7 A to 7B are the schematic diagram that needle bar mechanism of the present invention carries out oscillating stroke；

Fig. 8 is the stereogram of sewing machine transfer device second embodiment of the present invention；

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

Figure 10 is the exploded view of transfer device second embodiment of the present invention；

Figure 11 A to 11B are the schematic diagram that second embodiment of the invention carries out oscillating stroke.

Description of reference numerals：10- sewing machines；11- shanks；12- main shafts；13- shank supporting tables；14- pins put machine Structure；15- cams；16- shank driving handles；161- connecting portions；20- transfer devices；21- transmission members；211- Hemisphere face；211a- perforates；212- annulus；212a- perforates；213- orbicules；214- sleeve pipes；215- Connect pin bank；216- sliding blocks；217- swings gap；218- connection frames；218a- receiving spaces；218b- perforates； 218c- pivoted holes；The hemispherical recessed cups of 219-；219a- perforates；210- connecting pins；22- coupling member 221- shanks Frame；222- connecting portions；223- locking parts；224- hemispherical grooves；225- lock ring circles；226- jig arm；227- Screw；228- orbicules；229- location divisions；220- bolts；23- guide mechanisms；231- guide rails；232- First support；233- second supports；234- linking arms；235- support shafts.

Embodiment

The present invention is further described with reference to specific embodiments and the drawings, advantages of the present invention and feature will Can be with description and apparent.

Referring to Fig. 1, a shank 11 and a main shaft 12 are installed inside button holing sewing machine 10 of the present invention, Wherein, the upper top of the shank 11 is provided with a shank supporting table 13 for being assembled in the casing of sewing machine 10, and The bottom of the shank 11 is provided with a needle swinging mechanism 14 driven by drive motor (not shown).

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

Refer to shown in Fig. 4 and Fig. 5, transfer device 20 of the present invention includes a transmission member 21, one link The guide mechanism 23 of component 22 and one, in the first preferred embodiment, the transmission member 21 has between two The annulus 212 between the two hemispheres face 211 is arranged at every the hemisphere face 211 and one of setting, And it is collectively configured to an orbicule 213, and the two hemispheres with annulus 212 by two hemispheres face 211 Face 211 all penetrates direction along the shank 11 with annulus 212 and is respectively formed with perforate 211a, a 212a Penetrated for the shank 11, but the annulus 212 is respectively equipped with sleeve 214 in two opposite sides position, And two sleeve pipe 214 is installed on the shank driving handle 16 by a connection pin bank 215 respectively so that institute The 16 synchronous upper and lower displacement of shank driving handle can be coordinated by stating transmission member 21, and the connection pin bank 215 are additionally provided with the sliding block 216 that the cooperation guide mechanism 23 limits the direction of motion.

In feasible embodiment, described plural perforate 211a, 212a aperture must be more than the shank 11 External diameter, make between the outer peripheral face of the shank 11 and each perforate 211a, 212a inner peripheral surface that all there is foot Enough swing gaps 217；Wherein, the gap between the shank 11 and perforate 211a is to allow the shank The resigning of 11 deflection angles, the gap between the shank 11 and perforate 212a are to allow the shank 11 inclined Swinging adds the resigning of horizontal shift, therefore in actual use, the aperture of the perforate 212a need to be than opening Hole 211a aperture is big.

Referring again to shown in Fig. 4 and Fig. 5, coupling member 22 of the present invention is designed as two intervals and is fixed on the pin The needle bar frame 221 of the outer surface of bar 11, two needle bar frame 221 are adjacent to the transmission member 21 and pushed up respectively Portion and the opposite sides of bottom, wherein, the needle bar frame 22 penetrates direction along the shank 11 and is provided with One forms the connecting portion 222 of perforation pattern, and the needle bar frame 22 is in the position away from the transmission member 21 A locking part 223 is formed, and in the position of the adjacent transmission member 21 formed with a hemispherical groove 224.

In schema possible embodiments, the hemispherical groove 224 of two needle bar frame 22 will collectively form one Spherical spaces accommodate the orbicule 213 of the transmission member 21 so that the orbicule 213 can be in institute State and make relative spheric motion in spherical spaces, use and allow two needle bar frame 22 to be total to the three of transmission member 21 With a ball joint is formed, the construction that can reach transfer device 20 simplifies, and then can reduce the manufacture of sewing machine Cost.

Furthermore the lock ring circle 225 and one that the locking part 226 includes two jig arm 226 of formation is arranged in Two jig arm 226 changes the screw 227 of the internal diameter size of lock ring circle 225, makes user quick The needle bar frame 22 is installed, and is suitable for the abrasion of transmission member 21, it is convenient to adjust two needle bar frame 22 With the combinational gap of the transmission member 21；In addition, the locking part 223 also can with it is described hemispherical recessed Groove 224 links into an integrated entity, and can further simplify the number of components.

Referring again to shown in Fig. 1 and Fig. 4, guide mechanism 23 of the present invention has at least one to coordinate the sliding block 216 The guide rails 231 of installing, extend to form one as illustrated, guide rails of the present invention 231 are above-below direction Linear limit sliding chutes, the upper and lower displacement that the sliding block 216 is only capable of carrying out vertical direction is limited, thereby may be used Bearing shank driving handle 16 promotes the annulus 212 to move up and down caused side force, avoids this lateral Power disturbs the swing of shank 11.

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

Refer to shown in Fig. 6, when the main shaft 12 drives the shank driving handle 16 to operate, the biography Delivery device 20 is driven and moved up and down by the shank driving handle 16, due to the shank 11 with it is described Shank driving handle 16 connects, and therefore, the shank 11 transports generation synchronous with the transfer device 20 up and down It is dynamic.

Refer to shown in Fig. 7 A and Fig. 7 B, in addition, the needle swinging mechanism 14 can be in the transfer device 20 While up and down motion, the 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 the shank 11 is driven by the needle swinging mechanism 14 is carrying out swing state, the needle bar frame 22 Hemispherical groove 223 tilt with the 11 synchronous beat of shank, and the hemisphere of the transmission member 21 Face 211 does not tilt with the shank 11, only enters line displacement with shank 11, this will cause described hemispherical Relative spherical rotation is produced between groove 224 and hemisphere face 211；Simultaneously two hemispheres face 211 by The limitation of two halves bulbous recess 224 is supported, and is produced except that can allow between the hemisphere face 211 and annulus 212 Raw relative horizontal direction skew, also can be maintained at concentric sphere knot by the two hemispheres face 211 at any time Structure；Finally, two needle bar frame 221 will promoted two hemispheres face 211 by the annulus about 212 Vertical displacement can be produced during effect.

Refer to shown in Fig. 8 to Figure 10, in the second preferred embodiment, transmission member 21 of the present invention designs There are a connection frame 218 that square pattern is substantially presented and the spherical recessed cup 219 of two halves, wherein, the connection frame Distinguish formed with a receiving space 218a for accommodating the coupling member 22, and in upper/lower terminal in 218 centers Formed with a perforate 218b for accommodating the shank 11, separately a pivoted hole is respectively formed with arranged on left and right sides 218c, and the two pivoted holes 218c respectively by a connecting pin 210 groups be installed on the shank driving handle 16.

The spherical recessed cup 219 of two halves all has a perforate 219a again, and is located at the receiving space 218a In, a spherical spaces are formed positioned at the opposite sides of the coupling member 22 respectively, and the two halves are spherical Recessed cup 219 can produce phase in the beat effect by the coupling member 22 with the connection frame 218 To displacement.

In addition, the coupling member 22 is to be designed as one to be contained in the relative sphere fortune of work in the spherical spaces Dynamic orbicule 228, in the preferred embodiment of schema one, the coupling member 22 is by single orbicule 228 Form, the single orbicule 228 has a location division 229 connect for 220 groups of bolt, makes the single ball Shape body 228 can be locked in the outside of shank 11.

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

Refer to shown in Figure 11 A and Figure 11 B, when the shank 11 is driven by the needle swinging mechanism 14 During row swing state, the orbicule 228 of the coupling member 22 will incline with the 11 synchronous beat of shank Tiltedly, the connection frame 218 of the transmission member 21 does not carry out beat with the shank 11, and this will cause institute State and produced relatively between the spherical recessed cup 219 of two halves of transmission member 21 and the orbicule of the coupling member 22 Spherical rotation；Allow simultaneously between the spherical recessed cup 219 of the two halves and connection frame 218 and produce relative level Direction is offset so that the spherical spaces that the spherical recessed cup 219 of two halves is formed are maintained at concentric pattern；Most Afterwards, when the orbicule 228 will be promoted the spherical recessed cup 219 of the two halves to act on by the connection frame 218, The displacement of vertical direction can synchronously be produced.

Explanation and embodiment above is only exemplary, does not form any restrictions to the scope of the present invention. It will be understood by those skilled in the art that without departing from the spirit and scope of the invention can be to the present invention The details and form of technical scheme are modified or replaced, but these modifications and replacement each fall within the guarantor of the present invention In the range of shield.

Claims (12)

1. the transfer device that a kind of shank moves up and down, it is installed on the pin driven in sewing machine by needle swinging mechanism Bar, and interlocked with being connected to the shank driving handle of main shaft to be moved up and down, comprising：

Transmission member, there is the perforate penetrated for the shank, and be connected to the shank driving handle, by The shank driving handle, which drives, produces upper and lower displacement；

Coupling member, have and wear fixed connecting portion for the shank, and keep connecing with the transmission member Touch；

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

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

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

4. the transfer device that shank according to claim 3 moves up and down, it is characterised in that：The transmission Component is arranged at the ring-type between the two hemispheres face comprising two spaced hemisphere faces and one Portion, the two hemispheres face can produce phase when being acted on by the coupling member beat with the annulus To displacement.

5. the transfer device that shank according to claim 4 moves up and down, it is characterised in that：The ring-type Portion is respectively equipped with sleeve in two opposite sides position, and two sleeve pipe is installed on by a connection pin bank respectively The shank driving handle.

6. the transfer device that shank according to claim 3 moves up and down, it is characterised in that：The link Component includes two needle bar frames for being adjacent to the transmission member opposite sides respectively, and the needle bar frame is in neighbouring institute The position of transmission member is stated formed with a hemispherical groove, and away from the transmission member position formed with One locking part.

7. the transfer device that shank according to claim 1 moves up and down, it is characterised in that：The transmission Component is configured with a spherical spaces, and the coupling member is configured to an orbicule, and the orbicule can hold Make relative spheric motion in the spherical spaces.

8. the transfer device that shank according to claim 7 moves up and down, it is characterised in that：The transmission Component includes：

One connection frame, formed with a receiving space for accommodating the coupling member；

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

Wherein, the spherical recessed cup of the two halves can be with the connection when being acted on by the coupling member beat Frame produces relative displacement.

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

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

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

12. the transfer device that shank according to claim 11 moves up and down, it is characterised in that：It is described to lead Draw mechanism and include a first support and a second support, the first support is located at institute respectively with second support The opposite sides of transmission member is stated, and the first support has more several linking arms, and by described more several Linking arm is installed on an at least support shaft for the second support.