CN112663238A - Multi-needle-rod-driven embroidery machine head and embroidery machine - Google Patents

Abstract

The invention discloses a multi-needle-rod-driven embroidery machine head and an embroidery machine, and belongs to the technical field of embroidery machines. Every set of two needle bar drivers of connecting rod structure drive, the connecting rod structure on the same aircraft nose sets up side by side along transversely, rationally set up the corresponding relation between connecting rod structure and the needle bar driver, satisfy many needle bar drivers' drive requirement when suitably controlling connecting rod structure quantity, reduce the required installation space of connecting rod structure, be favorable to rationally simplifying the inner structure of aircraft nose, reserve out sufficient installation space for other components of aircraft nose, make the aircraft nose can satisfy many needle bar driven structural requirement.

Description

Multi-needle-rod-driven embroidery machine head and embroidery machine

Technical Field

The invention relates to the technical field of embroidery machines, in particular to a machine head of a multi-needle-rod driven embroidery machine.

Background

With the advancement of science and technology, computerized embroidery machines have become the main mechanical equipment in the embroidery industry, and the machine head of the embroidery machine is an important structure of the embroidery machine. In order to improve embroidery efficiency, a machine head of an embroidery machine is generally provided with two needle bar drivers which are arranged at intervals along the left-right direction, and a set of four-bar linkage structure is arranged between a needle bar driving shaft on the machine head and the two needle bar drivers to realize transmission. With the increasing number of machine heads of lace embroidery machines in the market, the development of the four-bar linkage structure between the existing needle bar driving shaft and the needle bar driver is greatly restricted in installation space and cost, and the four-bar linkage structure is not favorable for better meeting the working requirements of the embroidery machines.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the machine head of the multi-needle-rod driving embroidery machine, which effectively improves the driving efficiency of the machine head on the needle rods.

In order to achieve the technical purpose, the invention provides a multi-needle-rod driving embroidery machine head which comprises a machine shell, a needle rod driving shaft, a guide rod, a needle rod driver, a needle rod cam and a connecting rod structure. The guide rod and the needle bar drivers are respectively provided with 2N needle bar drivers at intervals along the transverse direction, N is a positive integer and is a multiple of 2, N sets of connecting rod structures are arranged side by side along the transverse direction, and each set of connecting rod structure drives two corresponding needle bar drivers.

Preferably, the connecting rod structure comprises a large connecting rod, a needle rod three-eye connecting rod and a needle rod small connecting rod, the large connecting rod is sleeved on the needle rod cam and is in transmission connection with the needle rod three-eye connecting rod, the rear end of the needle rod three-eye connecting rod is rotatably connected to the machine shell, and two ends of the needle rod small connecting rod are respectively rotatably connected to the needle rod three-eye connecting rod and the needle rod driver.

Preferably, the machine shell is provided with a transverse intermediate shaft, the bottom end of the large connecting rod tightly holds the intermediate shaft, the three-eye connecting rod of the needle rod is sleeved on the intermediate shaft, and the large connecting rod drives the three-eye connecting rod of the needle rod to swing up and down through the intermediate shaft.

Preferably, each set of connecting rod structure is provided with two small needle rod connecting rods which are respectively positioned at the two transverse sides of the three-eye connecting rod of the needle rod, one end of each small needle rod connecting rod is hinged with the front end of the three-eye connecting rod of the needle rod, and the other end of each small needle rod connecting rod is hinged with the corresponding needle rod driver.

Preferably, the needle bar cam is provided with N/2 connecting rods at intervals along the transverse direction, and the large connecting rods of the two adjacent sets of connecting rod structures corresponding to the needle bar cam are sleeved on the needle bar cam side by side along the transverse direction and are limited axially.

Preferably, the circumferential outer wall of the needle bar cam is provided with a limiting convex edge, and one axial side of the large connecting rod is abutted against the limiting convex edge to be limited axially.

Preferably, one axial side of the needle bar cam is provided with a limiting plate, the outer diameter of the limiting plate is larger than that of the needle bar cam, and the other axial side of the large connecting rod is abutted against the limiting plate and is limited axially.

Preferably, the rear end of the needle bar three-eye connecting rod is hinged to the machine shell through a positioning pin.

Preferably, the guide rods and the needle rod drivers are arranged in four directions at equal intervals along the transverse direction, and two sets of connecting rod structures are arranged.

The invention also provides an embroidery machine, which comprises the multi-needle-rod driven embroidery machine head.

After the technical scheme is adopted, the invention has the following advantages:

1. the machine head of the multi-needle-rod driving embroidery machine provided by the invention has the advantages that the number of the connecting rod structures is half of that of the needle rod drivers, each set of connecting rod structure drives two corresponding needle rod drivers, the connecting rod structures on the same machine head are arranged side by side along the transverse direction, the corresponding relation between the connecting rod structures and the needle rod drivers is reasonably arranged, the number of the connecting rod structures is properly controlled, meanwhile, the driving requirements of the needle rod drivers are met, the mounting space required by the connecting rod structures is reduced, the internal structure of the machine head is favorably and reasonably simplified, enough mounting space is reserved for other components of the machine head, and the machine head can meet the structural requirements of multi-needle-rod driving.

2. The connecting rod structure adopts a structure that a large connecting rod, a needle rod three-eye connecting rod, an intermediate shaft and a needle rod small connecting rod are matched, when a needle rod cam rotates, the intermediate shaft is driven to move up and down through the large connecting rod, the intermediate shaft drives the needle rod three-eye connecting rod to swing up and down, and the needle rod three-eye connecting rod drives a needle rod driver to move up and down along a guide rod through the small connecting rod, so that the aim of embroidering by driving the corresponding needle rod to move up. The connecting rod structure has simple components and can well meet the transmission requirement. The big connecting rods of all the sleeve connecting rod structures drive the corresponding needle rod three-eye connecting rods to swing through the middle shaft, so that the motion stability of the middle shaft is improved, the stability that the needle rod three-eye connecting rods of all the sleeve connecting rod structures drive the needle rod driver to move up and down through the small connecting rods of the needle rod is improved, and the working stability of the needle rod is improved.

3. The needle bar cams are half of the connecting rod structures in number, the large connecting rods of the two sets of connecting rod structures corresponding to a certain needle bar cam are transversely sleeved on the needle bar cam side by side, the large connecting rods of the two sets of connecting rod structures are driven by one needle bar cam, the quantity of the needle bar cams is reasonably reduced, meanwhile, the transmission requirement between the needle bar driving shaft and the connecting rod structures is met, the internal structure of the machine head is further reasonably simplified, and sufficient installation space is reserved for other components of the machine head.

4. Two big connecting rods which are sleeved on the same needle rod cam are limited in the axial direction through the limiting convex edges and the limiting plates, so that the structural stability of the big connecting rods is improved, and the stability of the connecting rod structure for driving the needle rod driver to move up and down is improved.

Drawings

FIG. 1 is a perspective view of a multi-needle bar driven embroidery machine head in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of a connecting rod structure and a needle bar driving shaft in a multi-needle bar driving embroidery machine head according to an embodiment of the present invention;

FIG. 3 is an exploded view of a portion of the components of FIG. 2;

FIG. 4 is an exploded view of a part of the link structure and the guide bar and the needle bar driver in the head of the multi-needle bar driving embroidery machine according to the embodiment of the present invention;

FIG. 5 is another perspective view of a multi-needle bar driven embroidery machine head in accordance with an embodiment of the present invention;

FIG. 6 is a schematic view of a presser foot mechanism, a presser foot transmission mechanism and a presser foot adjustment mechanism in a multi-needle bar driving embroidery machine head according to an embodiment of the present invention;

FIG. 7 is an exploded view of a portion of the components of FIG. 6;

FIG. 8 is a schematic view of an embroidery machine according to an embodiment of the invention;

FIG. 9 is a schematic view of a central drive transmission mechanism of an embroidery machine according to an embodiment of the invention;

fig. 10 is a schematic view showing a driving engagement structure between adjacent two needle bar driving shafts in an embroidery machine according to an embodiment of the present invention.

In the figure, 100-machine shell, 210-needle bar driving shaft, 211-transmission lug, 212-transmission groove, 220-needle bar cam, 221-limit convex edge, 230-limit plate, 240-presser foot driving wheel, 241-cam groove, 310-guide rod, 320-needle bar driver, 400-connecting rod structure, 410-big connecting rod, 420-needle bar three-eye connecting rod, 430-needle bar small connecting rod, 440-middle shaft, 500-presser foot mechanism, 510-presser foot strip, 520-presser foot, 530-presser foot lifting rod, 540-presser foot driver, 600-presser foot transmission mechanism, 610-presser foot driving rod, 620-presser foot transmission rod, 630-presser foot three-eye connecting rod, 640-presser foot small connecting rod, 650-linkage piece and 700-presser foot adjusting mechanism, 710-adjusting drive shaft, 720-adjusting main belt wheel, 730-adjusting auxiliary belt wheel, 740-adjusting drive belt, 750-presser foot shaft, 760-adjusting cam, 770-pipe sleeve, 810-main shaft, 820-machine head module, 830-lower shaft, 840-drive box, 851-second main belt wheel, 900-sub drive mechanism, 910-first main belt wheel, 920-first auxiliary belt wheel, 930-first drive belt, 940-support, 941-through hole, 950-tension member.

Detailed Description

The invention is further described with reference to the following figures and specific examples. It is to be understood that the following terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," "bottom," and the like are used merely to indicate an orientation or positional relationship relative to one another as illustrated in the drawings, merely to facilitate describing and simplifying the invention, and are not intended to indicate or imply that the device/component so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore are not to be considered limiting of the invention.

Example one

As shown in fig. 1 to 4, an embodiment of the invention provides a multi-needle-bar driving embroidery machine head, which includes a housing 100, a needle bar driving shaft 210, a guide rod 310, a needle bar driver 320, a needle bar cam 220 and a connecting rod structure 400, wherein the needle bar driving shaft 210 is transversely and rotatably disposed on the housing 100, the guide rod 310 is vertically disposed on the housing 100, the needle bar driver 320 is sleeved on the guide rod 310, the needle bar cam 220 is sleeved on the needle bar driving shaft 210, and the connecting rod structure 400 is disposed between the needle bar cam 220 and the needle bar driver 320 and is used for driving the needle bar driver 320 to move up and down. The guide rod 310 and the needle bar drivers 320 are respectively provided with 2N needle bar drivers at intervals along the transverse direction, N is a positive integer and is a multiple of 2, N sets of connecting rod structures 400 are arranged side by side along the transverse direction, and each set of connecting rod structure 400 drives the two corresponding needle bar drivers 320.

In the present embodiment, the axial direction of the needle bar drive shaft 210 is arranged in the left-right direction as viewed in the drawing, and the front-back direction as viewed in the drawing is arranged horizontally and vertically to the left-right direction. The needle bar driving shaft 210 is rotatably mounted on the housing 100 through a bearing, the guide rod 310 is fixed to the front side of the housing 100, and the needle bar cam 220 is eccentrically sleeved on the needle bar driving shaft 210. Preferably, four guide rods 310 and four needle bar drivers 320 are arranged at equal intervals in the transverse direction, and two sets of linkage structures 400 are arranged side by side in the transverse direction. In order to meet the requirement of small space installation of the handpiece, one needle bar cam 220 is provided, and the two link structures 400 are matched with the same needle bar cam 220.

The connecting rod structure 400 includes a large connecting rod 410, a needle bar three-eye connecting rod 420 and a needle bar small connecting rod 430, the large connecting rod 410 is sleeved on the needle bar cam 220 and is in transmission connection with the needle bar three-eye connecting rod 420, the rear end of the needle bar three-eye connecting rod 420 is rotatably connected to the machine case 100, and two ends of the needle bar small connecting rod 430 are respectively rotatably connected to the needle bar three-eye connecting rod 420 and the needle bar driver 320. In this embodiment, a transverse intermediate shaft 440 is disposed on the casing 100, the intermediate shaft 440 is located below the needle bar driving shaft 210, the upper ends of the two large connecting rods 410 of the two sets of connecting rod structures 400 are horizontally sleeved side by side on the circumferential outer portion of the needle bar cam 220 and are axially limited, the lower ends of the two large connecting rods 410 are all sleeved on the intermediate shaft 440 and tightly clasp the intermediate shaft 440 through bolts, and the rod body portions of the two large connecting rods are arranged in an eight-shape. The rear end of the needle bar three-eye link 420 is hinged to the machine case 100 through a positioning pin, the approximate middle part of the needle bar three-eye link 420 is sleeved on the intermediate shaft 440 through a bearing, and the large link 410 is in transmission connection with the needle bar three-eye link 420 through the intermediate shaft 440. Each set of link structure 400 is provided with two needle bar small links 430 respectively located at the left and right sides of the needle bar three-eye link 420, one end of the needle bar small link 430 is hinged to the front end of the needle bar three-eye link 420 through a connecting pin, and the other end is hinged to the corresponding needle bar driver 320 through a connecting pin. The needle bar driving shaft 210 drives the needle bar cam 220 to rotate when rotating, the needle bar cam 220 drives the needle bar driver 320 to move up and down relative to the guide rod 310 through the large connecting rod 410, the middle shaft 440, the needle bar three-eye connecting rod 420 and the needle bar small connecting rod 430, the needle bar driver 320 is matched with the corresponding needle bar on the needle bar frame and drives the needle bar to move up and down, and the purpose of driving the multiple needle bars is achieved. Specifically, the left set of linkage arrangements 400 drives the left two needle bar drivers 320, and the right set of linkage arrangements 400 drives the right two needle bar drivers 320.

In order to axially limit the large connecting rods 410, the circumferential outer wall of the needle bar cam 220 is provided with a limiting convex edge 221, a limiting plate 230 is fixed on one axial side of the needle bar cam 220 far away from the limiting convex edge 221, the outer diameter of the limiting plate 230 is larger than that of the needle bar cam 220, one axial side of each of the two large connecting rods 410 is abutted against the limiting convex edge 221, the other axial side of each of the two large connecting rods 410 is abutted against the limiting plate 230, and the large connecting rods 410 sleeved on the needle bar cam 220 are axially limited through the limiting convex edges 221 and the limiting plates 230.

As shown in fig. 5 to 7, in order to ensure embroidery quality, the embroidery machine head of the present embodiment further includes a presser foot driving wheel 240, a presser foot mechanism 500, a presser foot transmission mechanism 600, and a presser foot adjustment mechanism 700. The presser foot driving wheel 240 is eccentrically sleeved on the needle bar driving shaft 210, the presser foot mechanism 500 comprises a presser foot strip 510, a presser foot 520 and a plurality of presser foot lifting rods 530, the presser foot strip 510 is transversely arranged at the bottom of the machine shell 100, the presser feet 520 are arranged on the presser foot strip 510 and are transversely spaced, the presser foot lifting rods 530 are vertically arranged on the machine shell 100, and the bottom ends of the presser foot lifting rods are connected to the presser foot strip 510. The presser foot transmission mechanism 600 is disposed between the presser foot driving wheel 240 and the presser foot lifting rod 530 and is used for driving the presser foot mechanism 500 to move up and down, and the presser foot adjustment mechanism 700 is disposed on the machine shell 100 and adjusts the vertical position of the presser foot mechanism 500 through the presser foot transmission mechanism 600.

In this embodiment, the number of the presser feet 520 is one-to-one corresponding to the number of the needle bar drivers 320, that is, four presser feet 520 are provided at equal intervals in the lateral direction. To improve the stability of the vertical movement of the presser foot mechanism 500, two presser foot lifting rods 530 are provided at intervals in the lateral direction and correspond to the two ends of the presser foot bar 510. To avoid interference of the presser foot mechanism 500 with the engagement between the needle bar driver 320 and the needle bar, the left presser foot lifting lever 530 is located on the left side of the leftmost guide bar 310, and the right presser foot lifting lever 530 is located on the right side of the rightmost guide bar 310.

In order to improve the lifting stability of the presser foot mechanism 500, the presser foot mechanism 500 further includes presser foot drivers 540 disposed in one-to-one correspondence with the presser foot lifting rods 530, the left presser foot driver 540 is sleeved on the leftmost guide rod 310 and located at the bottom of the needle rod driver 320, the right presser foot driver 540 is sleeved on the rightmost guide rod 310 and located at the bottom of the needle rod driver 320, the top end of the left presser foot lifting rod 530 is fixedly connected with the left presser foot driver 540, and the top end of the right presser foot lifting rod 530 is fixedly connected with the right presser foot driver 540. Correspondingly, two sets of presser foot transmission mechanisms 600 are arranged at intervals along the transverse direction and are arranged in one-to-one correspondence with the two presser foot drivers 540.

Referring to fig. 7, the presser foot transmission mechanism 600 includes a presser foot driving rod 610, a presser foot transmission rod 620, a presser foot three-hole connecting rod 630 and a presser foot small connecting rod 640, the presser foot adjustment mechanism 700 includes an adjustment motor, an adjustment transmission structure and a presser foot shaft 750, the presser foot shaft 750 is rotatably mounted on the housing 100 through a bearing and is located below the needle bar driving shaft 210, and a sleeve 770 is sleeved outside the presser foot shaft 750.

The front end of the presser foot drive rod 610 is provided with a linkage 650 which can be rotatably arranged, the axial side wall of the presser foot drive wheel 240 is provided with a cam groove 241 matched with the linkage 650, the linkage 650 is positioned in the cam groove 241, and the front end of the presser foot drive rod 610 is matched with the presser foot drive wheel 240 through the matching of the linkage and the cam groove. Specifically, the linkage 650 includes a linkage bearing disposed at the front end of the presser foot driving lever 610 through a connecting pin, and a linkage wheel sleeved outside the linkage bearing.

The rear end of the presser foot drive rod 610 is sleeved outside the pipe sleeve 770 to realize rotatable arrangement, the rear end of the presser foot three-eye connecting rod 630 is sleeved outside the presser foot shaft 750, one end of the presser foot drive rod 620 is hinged with the presser foot drive rod 610 through a connecting pin, the other end of the presser foot drive rod 620 is hinged with the approximate middle part of the presser foot three-eye connecting rod 630 through a connecting pin, one end of the presser foot small connecting rod 640 is hinged with the front end of the presser foot three-eye connecting rod 630 through a connecting pin, and the other end of the presser foot small connecting rod 640 is hinged with the. When the needle bar driving shaft 210 rotates, the presser foot driving wheel 240 is driven to rotate, the presser foot driving wheel 240 drives the presser foot three-hole connecting rod 630 to swing up and down through the linkage 650, the presser foot driving rod 610 and the presser foot driving rod 620, the presser foot three-hole connecting rod 630 drives the presser foot driver 540 to move up and down relative to the guide rod 310 through the presser foot small connecting rod 640, and the presser foot driver 540 drives the presser foot 520 to move up and down through the presser foot lifting rod 530 and the presser foot strip 510, so that the purpose of repeatedly pressing the upper thread can be realized by matching the presser foot 520.

In this embodiment, the adjusting transmission structure includes an adjusting transmission shaft 710, an adjusting main pulley 720, an adjusting auxiliary pulley 730 and an adjusting transmission belt 740, the adjusting transmission shaft 710 is driven by an adjusting motor, the adjusting transmission shaft 710 is disposed at the rear side of the casing 100 in a transverse axial direction, the adjusting main pulley 720 is sleeved on the adjusting transmission shaft 710, the adjusting auxiliary pulley 730 is sleeved on the presser foot shaft 750, and the adjusting transmission belt 740 is sleeved on the adjusting main pulley 720 and the adjusting auxiliary pulley 730. The adjusting motor drives the adjusting transmission shaft 710 to rotate, the adjusting transmission shaft 710 drives the presser foot shaft 750 to rotate through the belt wheel structure, the presser foot shaft 750 can drive the presser foot three-hole connecting rod 630 to swing up and down when rotating, and the presser foot adjusting mechanism 700 achieves the purpose of adjusting the vertical position of the presser foot mechanism 500 by adjusting the inclination angle between the presser foot three-hole connecting rod 630 and the horizontal direction. Under the conditions that the embroidery cloth needs to be replaced, the embroidery machine needs to be stopped and the like, the presser foot mechanism 500 can be lifted through the presser foot adjusting mechanism 700, and the interference of the presser foot mechanism 500 on the operation of replacing the embroidery cloth and the like is avoided. After the operation is completed, the presser foot mechanism 500 is lowered through the presser foot adjusting mechanism 700, so that the presser foot mechanism 500 can reciprocate up and down under the driving of the presser foot transmission mechanism 600 to achieve the purpose of repeatedly pressing the upper thread.

In this embodiment, in order to increase the amplitude of the vertical swing of the presser foot adjustment mechanism 700 driving the presser foot three-eye connecting rod 630, the presser foot adjustment mechanism 700 further includes an adjustment cam 760 eccentrically sleeved on the presser foot shaft 750, and the rear end of the presser foot three-eye connecting rod 630 is sleeved outside the adjustment cam 760 and axially limited.

The embodiment also provides an embroidery machine, which comprises the embroidery machine head.

With reference to fig. 8 and 9, the embroidery machine of the present embodiment adopts a modular structure, and includes a transverse main shaft 810, a main driving motor for driving the main shaft 810, and a plurality of head modules 820 arranged at intervals in the transverse direction, the main shaft 810 is arranged outside each head module 820, each head module 820 is provided with a transverse needle bar driving shaft 210, and a sub-driving transmission mechanism 900 is arranged between the needle bar driving shaft 210 of each head module 820 and the main shaft 810.

In this embodiment, the main shaft 810 is disposed above the head modules 820, each head module 820 is provided with two heads disposed side by side in the transverse direction, each head is provided with a needle bar driving shaft 210, the sub-driving transmission mechanisms 900 are disposed in one-to-one correspondence with the head modules 820, an output end of each sub-driving transmission mechanism 900 is engaged with one needle bar driving shaft 210 of the head module 820, and a transmission engagement structure is disposed between the two needle bar driving shafts 210.

The driving-independent transmission mechanism 900 includes a first primary pulley 910, a first secondary pulley 920 and a first transmission belt 930, the first primary pulley 910 is sleeved on the main shaft 810, the first secondary pulley 920 is sleeved on one of the needle bar driving shafts 210 of the head module 820, and the first transmission belt 930 is sleeved on the first primary pulley 910 and the first secondary pulley 920. Referring to fig. 10, the transmission engagement structure between two adjacent needle bar driving shafts 210 includes a transmission protrusion 211 and a transmission groove 212 that are engaged with each other, the transmission protrusion 211 and the transmission groove 212 are respectively disposed at the end portions of two adjacent needle bar driving shafts 210, and the transmission protrusion 211 is engaged in the transmission groove 212. The main shaft 810 drives one of the needle bar driving shafts 210 of the head module 820 to rotate through the sub-drive transmission mechanism 900, and the needle bar driving shaft 210 drives the other needle bar driving shafts 210 to synchronously rotate through the transmission matching structure. In this embodiment, the driving protrusions 211 and the driving recesses 212 are in the shape of a straight line.

In order to improve the transmission effectiveness between the main shaft 810 and the needle bar drive shaft 210, each sub-drive transmission mechanism 900 further comprises a tensioning structure for tensioning the first transmission belt 930, the tensioning structure comprises a fixedly arranged support 940 and a tensioning member 950 rotatably arranged on the support 940, and the tensioning member 950 is in interference fit with the first transmission belt 930. In this embodiment, the embroidery machine includes a frame, the support 940 is fixed on the frame, the support 940 is provided with a through hole 941 having an inner diameter greater than an outer diameter of the main shaft 810, and the main shaft 810 passes through the support 940 from the through hole 941. The tensioning member 950 includes a tensioning bearing and a tensioning wheel, the tensioning bearing is rotatably disposed on the support 940 via a connecting pin, the tensioning wheel is fixedly sleeved outside the tensioning bearing, and the circumferential outer wall of the tensioning wheel abuts against the first driving belt 930 to tension the first driving belt 930.

The embroidery machine of this embodiment further includes a lower shaft 830 and a transmission case 840, the lower shaft 830 is transversely disposed at the bottom of the head module 820 and is used for driving components such as the shuttle case, an inter-shaft transmission structure between the main shaft 810 and the lower shaft 830 is disposed in the transmission case 840, and the main shaft 810 drives the lower shaft 830 to rotate through the inter-shaft transmission structure.

The transmission case 840 is fixed on the rack, in order to improve the transmission stability, the transmission case 840 is provided with two transmission cases 840, the two transmission cases 840 are respectively positioned at the left end and the right end of the main shaft 810 and the lower shaft 830, an inter-shaft transmission structure is respectively arranged in the two transmission cases 840, the left end of the main shaft 810 and the left end of the lower shaft 830 extend into the transmission case 840 at the left side, and the right end of the main shaft 810 and the right end of the lower shaft 830 extend into the transmission case 840 at the right side. The transmission structure between shafts adopts a belt wheel structure, and comprises a second main belt wheel 851, a second auxiliary belt wheel and a second transmission belt, wherein the second main belt wheel 851 is sleeved on the main shaft 810, the second auxiliary belt wheel is sleeved on the lower shaft 830, and the second transmission belt is sleeved on the second main belt wheel 851 and the second auxiliary belt wheel.

When the main drive motor works, the main shaft 810 is driven to rotate, and the main shaft 810 drives the needle bar driving shafts 210 on the machine head modules 820 to rotate through the sub-drive transmission mechanism 900. The needle bar driving shaft 210 drives the needle bar driver 320 to move up and down through the needle bar cam 220 and the link structure 440, and the needle bar driver 320 drives the needle bar engaged therewith to move up and down for embroidering. Meanwhile, the needle bar driving shaft 210 drives the presser foot mechanism 500 to move up and down through the presser foot cam 240 and the presser foot transmission mechanism 600, so that the presser foot 520 can work in cooperation with the needle bar to achieve the purpose of repeatedly pressing the upper thread.

In the case where the embroidery cloth needs to be replaced, the presser foot mechanism 500 may be lifted up by the presser foot adjustment mechanism 700. After the replacement is completed, the presser foot mechanism 500 is moved down to the working position by the presser foot adjusting mechanism 700.

It is to be understood that the specific number of the guide rods 310, the needle bar drivers 320, the link structures 400 and the needle bar cams 220 on each head is not limited to those described above and shown in the drawings, and the number of the guide rods 310 and the needle bar drivers 320 may be increased correspondingly if the head is increased in lateral dimension. If the guide rod 310 and the needle bar driver 320 are arranged at eight intervals along the transverse direction, at this time, two needle bar cams 220 are sleeved on the needle bar driving shaft 210, the connecting rod structures 400 are arranged in four sets, the large connecting rods 410 of the two sets of connecting rod structures 400 on the left side are sleeved on the needle bar cam 220 on the left side, the large connecting rods 410 of the two sets of connecting rod structures 400 on the right side are sleeved on the needle bar cam 220 on the right side, the middle shaft 440 can be arranged to be one, and the middle shafts 440 are all embraced by the lower ends of the large connecting rods 410 of the. Of course, two intermediate shafts 440 may be arranged at intervals in the transverse direction, the left intermediate shaft 440 is engaged with the large links 410 of the left two sets of link structures 400, and the right intermediate shaft 440 is engaged with the large links 410 of the right two sets of link structures 400.

It is understood that the number of presser feet 520 in the presser foot mechanism 500 coincides with the number of needle bar drivers 320, i.e., the presser feet and the needle bar drivers are provided in one-to-one correspondence.

It is understood that another limiting plate may be used instead of the limiting ledge 221 on the circumferential outer wall of the needle bar cam 220 to axially limit the large link 410, and at this time, the two limiting plates are fixed to the two axial sides of the needle bar cam 220.

It should be understood that the specific shapes of the driving protrusions 211 and the driving recesses 212 are not limited to the shape of a straight line as described above and shown in the drawings, and may be other reasonable shapes such as a cross shape, a meter shape, etc.

It is understood that the specific number of heads in each head module 820 is not limited to two as described above and shown in the drawings, and may be set to one, three, etc. other reasonable numbers.

It is understood that the presser foot mechanism 500, the presser foot drive mechanism 600 and the presser foot adjustment mechanism 700 may be embodied in other ways.

Other embodiments of the present invention than the preferred embodiments described above, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, should fall within the scope of the present invention defined in the claims.

Claims (10)

1. The utility model provides a many needle bars drive embroidery machine aircraft nose, includes the casing, the needle bar drive shaft, the guide arm, the needle bar driver, needle bar cam and connecting rod structure, the rotatable horizontal casing of arranging of needle bar drive shaft, the guide arm is erect on the casing, on the guide arm was located to needle bar driver cover, on the needle bar drive shaft was located to needle bar cam cover, the connecting rod structure was located between needle bar cam and the needle bar driver and was used for driving needle bar driver up-and-down motion, a serial communication port, guide arm and needle bar driver all are equipped with 2N along horizontal interval, and N is positive integer and is 2 multiple, and the connecting rod structure is equipped with N cover along transversely side by side, every set of connecting rod structure drive with two.

2. The head of the multi-needle bar driving embroidery machine as claimed in claim 1, wherein the link structure comprises a large link, a needle bar three-eye link and a needle bar small link, the large link is sleeved on the needle bar cam and is in transmission connection with the needle bar three-eye link, the rear end of the needle bar three-eye link is rotatably connected to the machine case, and the two ends of the needle bar small link are respectively rotatably connected to the needle bar three-eye link and the needle bar driver.

3. The machine head of the multi-needle bar driving embroidery machine as claimed in claim 2, wherein the machine housing is provided with a transverse intermediate shaft, the bottom end of the large link tightly embraces the intermediate shaft, the needle bar three-eye link is sleeved on the intermediate shaft, and the large link drives the needle bar three-eye link to swing up and down through the intermediate shaft.

4. The head of the multi-needle-bar driving embroidery machine as claimed in claim 3, wherein each set of the link structure is provided with two needle bar small links respectively located at both lateral sides of the needle bar three-eye link, one end of each of the two needle bar small links is hinged to the front end of the needle bar three-eye link, and the other end thereof is hinged to the corresponding needle bar driver.

5. The machine head of the multi-needle-bar driving embroidery machine as claimed in claim 2, wherein the needle bar cams are provided with N/2 large connecting bars at intervals in the transverse direction, and the large connecting bars of two adjacent sets of connecting bar structures corresponding to the needle bar cams are sleeved on the needle bar cams side by side in the transverse direction and are axially limited.

6. The head of the multi-needle bar driving embroidery machine as claimed in claim 5, wherein the needle bar cam is provided with a limit protrusion on a circumferential outer wall thereof, and one axial side of the large link abuts against the limit protrusion to be axially limited.

7. The multiple needle bar driving embroidery machine head as claimed in claim 5, wherein a limiting plate is provided at one axial side of the needle bar cam, the limiting plate has an outer diameter larger than that of the needle bar cam, and the other axial side of the large link abuts against the limiting plate to be axially limited.

8. The head of a multi-needle bar driving embroidery machine as claimed in claim 2, wherein the rear ends of the three-eye links of the needle bars are hinged to the housing by means of positioning pins.

9. The multiple needle bar driving embroidery machine head as claimed in claim 1, wherein there are four guide bars and four needle bar drivers at equal intervals in the lateral direction, and there are two sets of link structures.

10. An embroidery machine comprising a multi-needle-bar driving embroidery machine head according to any one of claims 1 to 9.

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