阅读说明：本技术 一种绣花机 (Embroidery machine ) 是由 王海江 田桂郁 于 2020-12-23 设计创作，主要内容包括：本发明公开了一种绣花机,属于刺绣设备技术领域,包括上轴及主驱电机,还包括多个机头模块,主轴设于各机头模块的外部,各机头模块包括至少一个机头,机头包括机壳、针杆驱动轴、导杆、针杆驱动器、针杆凸轮、连杆结构、压脚结构、压脚驱动轮及压脚传动机构,连杆结构设于针杆凸轮与针杆驱动器之间且用于带动针杆驱动器上下运动,压脚传动机构设于压脚驱动轮与压脚机构之间且用于带动压脚机构上下运动。由于主轴设于机头模块的外部,可以通过增大主轴的外径来提高自身的强度,更好的满足绣花机的结构要求。需要更换主轴时,只需将分驱传动机构的相关构件自主轴上拆卸即可,无需拆卸机头模块上的构件。(The invention discloses an embroidery machine, which belongs to the technical field of embroidery equipment and comprises an upper shaft, a main drive motor and a plurality of machine head modules, wherein the main shaft is arranged outside each machine head module, each machine head module comprises at least one machine head, each machine head module comprises a machine shell, a needle rod drive shaft, a guide rod, a needle rod driver, a needle rod cam, a connecting rod structure, a presser foot drive wheel and a presser foot transmission mechanism, the connecting rod structure is arranged between the needle rod cam and the needle rod driver and used for driving the needle rod driver to move up and down, and the presser foot transmission mechanism is arranged between the presser foot drive wheel and the presser foot mechanism and used for driving. Because the main shaft is arranged outside the machine head module, the strength of the main shaft can be improved by increasing the outer diameter of the main shaft, and the structural requirement of the embroidery machine can be better met. When the main shaft needs to be replaced, only the related components of the driving transmission mechanism need to be disassembled from the main shaft, and the components on the machine head module do not need to be disassembled.)

1. An embroidery machine, including the horizontal upper shaft and main drive motor used for driving the upper shaft, characterized by, also include a plurality of head modules set up along the horizontal interval, the main axis locates the outside of each head module, each head module includes at least one aircraft nose, the aircraft nose includes the casing, the needle bar drive shaft, the guide arm, the needle bar driver, the needle bar cam, the connecting rod structure, the presser foot drive wheel and the presser foot drive mechanism, the needle bar drive shaft is rotatable to be set up on the casing horizontally, all there are driving drive mechanisms separately between needle bar drive shaft and the main axis of each head module, the guide arm is erected on the casing, the needle bar driver is located on the guide arm, the needle bar cam and the presser foot drive wheel are all eccentrically located on the needle bar drive shaft, the connecting rod structure locates between needle bar cam and the needle bar driver and is used for driving the, the presser foot transmission mechanism is arranged between the presser foot driving wheel and the presser foot mechanism and is used for driving the presser foot mechanism to move up and down.

2. The embroidery machine as claimed in claim 1, wherein the presser foot mechanism includes a presser foot bar disposed transversely at the bottom of the housing, a plurality of presser feet provided on the presser foot bar and spaced transversely therefrom, a presser foot lifter vertically disposed on the housing and having a bottom end connected to the presser foot bar, and a presser foot driver sleeved on the guide rod and connected to the presser foot lifter.

3. The embroidery machine as claimed in claim 2, wherein the machine head includes a presser foot adjustment mechanism disposed on the machine housing, the presser foot transmission mechanism includes a presser foot three-hole link rod capable of swinging up and down, the presser foot adjustment mechanism includes an adjustment motor, an adjustment transmission structure and a presser foot shaft, the presser foot shaft is rotatably disposed on the machine housing, the rear end of the presser foot three-hole link rod is sleeved on the presser foot shaft, the front end of the presser foot three-hole link rod is connected to the presser foot driver, and the presser foot adjustment mechanism adjusts the vertical position of the presser foot mechanism by adjusting the inclination angle of the presser foot three-hole link rod relative to the horizontal direction.

4. The embroidery machine as claimed in claim 3, wherein the presser foot adjustment mechanism further comprises an adjustment cam eccentrically sleeved on the presser foot shaft, and the rear end of the presser foot three-eye link is sleeved outside the adjustment cam in the circumferential direction.

5. The embroidery machine as claimed in claim 2, wherein the presser foot drive mechanism further comprises a presser foot drive lever, a presser foot drive rod and a presser foot small link, one end of the presser foot drive lever is rotatably arranged, the other end of the presser foot drive lever is matched with the presser foot drive wheel, two ends of the presser foot drive rod are respectively connected with the presser foot drive lever and the presser foot three-hole link, two ends of the presser foot small link are respectively connected with the presser foot three-hole link and the presser foot lifting link, and the presser foot drive wheel drives the presser foot mechanism to move up and down through the presser foot drive lever, the presser foot drive rod, the presser.

6. The embroidery machine as claimed in claim 1, wherein the guide rod and the needle bar drivers are each provided with 2N number of needle bar drivers at intervals in the lateral direction, N being a positive integer and a multiple of 2, and N sets of link structures are provided side by side in the lateral direction, each set of link structures driving the two needle bar drivers corresponding thereto.

7. The embroidery machine as claimed in claim 6, wherein the link structure includes 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 both ends of the needle bar small link are rotatably connected to the needle bar three-eye link and the needle bar driver, respectively.

8. The embroidery machine as claimed in claim 7, wherein the housing has a horizontal 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.

9. The embroidery machine as claimed in claim 7, wherein the needle bar cam is provided with a limit protrusion on an outer circumferential wall thereof, a limit plate having an outer diameter larger than that of the needle bar cam is provided on one axial side of the needle bar cam, and both axial sides of the large link respectively abut against the limit protrusion and the limit plate to axially limit the large link.

10. The embroidery machine as claimed in claim 1, further comprising a lower shaft disposed transversely to the bottom of the head module, and a transmission case in which an inter-shaft transmission structure is disposed between the main shaft and the lower shaft, the main shaft driving the lower shaft to rotate through the inter-shaft transmission structure.

Technical Field

The invention relates to the technical field of embroidery equipment, in particular to an 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 the existing embroidery machine structure, a main shaft penetrates through all machine heads to provide power for needle bar driving and presser foot driving on each machine head. With the market demand rising, the number of machine heads on the embroidery machine is increasing, and therefore, the requirement on the rigidity of the main shaft is higher and higher. In the structure of the existing embroidery machine, the size of a main shaft is limited due to the arrangement of the main shaft penetrating through a machine head, and the strength of the main shaft cannot well meet the driving requirement of the embroidery machine. If the strength of the main shaft is improved by increasing the outer diameter of the main shaft, in order to reserve a sufficient installation space, the overall dimension of the machine head needs to be correspondingly increased, the body shape of the embroidery machine is increased accordingly, and the control of the production cost is not facilitated. In addition, when the main shaft is deformed or broken and needs to be replaced, the needle bar driving mechanism and the presser foot driving mechanism on all the machine heads need to be detached from the main shaft, and the maintenance is complex.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the embroidery machine which is beneficial to improving the strength of the main shaft and is convenient for replacing the main shaft.

In order to achieve the technical purpose, the invention provides an embroidery machine, which comprises a transverse upper shaft, a main drive motor for driving the upper shaft, and a plurality of machine head modules arranged at intervals along the transverse direction, wherein a main shaft is arranged outside each machine head module, each machine head module comprises at least one machine head, each machine head comprises a machine shell, a needle rod driving shaft, a guide rod, a needle rod driver, a needle rod cam, a connecting rod structure, a presser foot driving wheel and a presser foot transmission mechanism, the needle rod driving shaft can be rotatably and transversely arranged on the machine shell, a sub-drive transmission mechanism is arranged between the needle rod driving shaft of each machine head module and the main shaft, the guide rod is vertically arranged on the machine shell, the needle rod driver is sleeved on the guide rod, the needle rod cam and the presser foot driving wheel are eccentrically sleeved on the needle rod driving shaft, the connecting rod structure is arranged between the needle, the presser foot transmission mechanism is arranged between the presser foot driving wheel and the presser foot mechanism and is used for driving the presser foot mechanism to move up and down.

Preferably, the presser foot mechanism comprises a presser foot strip, a plurality of presser feet, a presser foot lifting rod and a presser foot driver, the presser foot strip is transversely arranged at the bottom of the casing, the presser feet are arranged on the presser foot strip and are transversely arranged at intervals, the presser foot lifting rod is vertically arranged on the casing, the bottom end of the presser foot lifting rod is connected to the presser foot strip, and the presser foot driver is sleeved on the guide rod and is connected with the presser foot lifting rod.

Preferably, the machine head comprises a presser foot adjusting mechanism arranged on the machine shell, the presser foot transmission mechanism comprises a presser foot three-hole connecting rod capable of swinging up and down, the presser foot adjusting mechanism comprises an adjusting motor, an adjusting transmission structure and a presser foot shaft, the presser foot shaft is rotatably and transversely arranged on the machine shell, the rear end of the presser foot three-hole connecting rod is sleeved on the presser foot shaft, the front end of the presser foot three-hole connecting rod is connected to a presser foot driver, and the vertical position of the presser foot mechanism is adjusted by adjusting the inclination angle of the presser foot three-hole connecting rod relative to the horizontal direction.

Preferably, the presser foot adjusting mechanism further comprises an adjusting cam eccentrically sleeved on the presser foot shaft, and the rear end of the presser foot three-eye connecting rod is sleeved outside the circumference of the adjusting cam.

Preferably, the presser foot transmission mechanism further comprises a presser foot driving rod, a presser foot transmission rod and a presser foot small connecting rod, one end of the presser foot driving rod can be rotatably arranged, the other end of the presser foot driving rod is matched with the presser foot driving wheel, two ends of the presser foot transmission rod are respectively connected with the presser foot driving rod and the presser foot three-hole connecting rod, two ends of the presser foot small connecting rod are respectively connected with the presser foot three-hole connecting rod and the presser foot lifting rod, and the presser foot driving wheel drives the presser foot mechanism to move up and down through the presser foot driving rod.

Preferably, 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 the 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, be equipped with spacing protruding edge on the circumference outer wall of needle bar cam, axial one side of needle bar cam is equipped with the limiting plate that the external diameter is greater than the needle bar cam, and the axial both sides of big connecting rod are contradicted with spacing protruding edge and limiting plate respectively and are made big connecting rod receive the axial spacing.

Preferably, the embroidery machine further comprises a lower shaft and a transmission case, the lower shaft is transversely arranged at the bottom of the machine head module, an inter-shaft transmission structure between the main shaft and the lower shaft is arranged in the transmission case, and the main shaft drives the lower shaft to rotate through the inter-shaft transmission structure.

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

1. according to the embroidery machine provided by the invention, the main shaft is arranged outside the machine head module, the strength of the main shaft can be improved by increasing the outer diameter of the main shaft, the structural requirement of the embroidery machine is better met, and the change of the outer diameter of the main shaft does not influence the appearance size of the machine head and the internal installation space of the machine head. When the main shaft needs to be replaced, only the related components of the driving transmission mechanism need to be detached from the main shaft, and the components on the head module do not need to be detached, so that the number of the components needing to be detached is greatly reduced, the maintenance difficulty is reduced, and the maintenance efficiency is improved.

The main shaft drives the needle bar driving shaft to rotate through the sub-drive transmission mechanism, the needle bar driving shaft can drive the needle bar driver to move up and down through the needle bar cam and the connecting rod structure, the needle bar driver can drive the corresponding needle bar to move up and down, meanwhile, the needle bar driving shaft can drive the presser foot mechanism to move up and down through the presser foot driving wheel and the presser foot transmission mechanism, the main shaft can transmit power to the needle bar and the presser foot mechanism, and the driving requirement of the embroidery machine during working is effectively met.

2. The presser foot adjusting mechanism can adjust the vertical position of the presser foot mechanism through the presser foot transmission mechanism, is convenient to lift the presser foot mechanism in the states of changing embroidery cloth, stopping and the like, and avoids the interference of the presser foot mechanism on the operation of changing embroidery cloth and the like. The rear end of the presser foot three-eye connecting rod is sleeved on the presser foot shaft through the adjusting cam, the presser foot shaft drives the presser foot three-eye connecting rod to swing up and down through the adjusting cam when rotating, the connection relation between the presser foot three-eye connecting rod and the presser foot adjusting mechanism is reasonably arranged, and the presser foot adjusting mechanism can drive the presser foot three-eye connecting rod to effectively swing when adjusting the vertical position of the presser foot mechanism, so that the presser foot three-eye connecting rod can drive the presser foot mechanism to effectively lift.

3. The presser foot transmission mechanism adopts a connecting rod matching structure, when the presser foot driving wheel rotates along with the needle rod driving shaft, the presser foot three-hole connecting rod is driven to swing up and down through the presser foot driving rod and the presser foot transmission rod, and the presser foot transmission rod drives the presser foot mechanism to move up and down through the small presser foot connecting rod during the swing up and down, so that the driving purpose is realized.

4. The corresponding relation between the connecting rod structure and the needle rod drivers is reasonably arranged, the driving requirements of the needle rod drivers are met while the quantity of the connecting rod structures is properly controlled, the mounting space required by the connecting rod structure is reduced, the reasonable simplification of the internal structure of the machine head is facilitated, 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.

5. 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 needle rod connecting rods is improved, and the work stability of the needle rods is improved.

6. 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.

7. The main shaft drives the lower shaft to rotate through an inter-shaft transmission structure in the transmission box, the lower shaft is used for driving related components in the shuttle box to work, the inter-shaft transmission structure preferably adopts a belt wheel transmission structure, the structure is simple, and the transmission requirement between the main shaft and the lower shaft can be well met.

Drawings

FIG. 1 is a schematic view of an embroidery machine according to an embodiment of the present invention;

FIG. 2 is a schematic view of a central drive transmission mechanism of an embroidery machine according to an embodiment of the invention;

FIG. 3 is a schematic view showing a driving engagement structure between two adjacent needle bar driving shafts in an embroidery machine according to an embodiment of the present invention;

FIG. 4 is a perspective view illustrating a head of an embroidery machine according to an embodiment of the present invention;

FIG. 5 is a schematic view showing a link structure and a needle bar driving shaft in an embroidery machine according to an embodiment of the present invention;

FIG. 6 is an exploded view of a portion of the components of FIG. 5;

FIG. 7 is an exploded view illustrating a part of the link structure together with the guide bar and the needle bar driver in the embroidery machine according to the embodiment of the present invention;

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

fig. 9 is a schematic view of a presser foot mechanism, a presser foot transmission mechanism and a presser foot adjustment mechanism of a head in an embroidery machine according to an embodiment of the present invention;

fig. 10 is an exploded view of a portion of the components of fig. 9.

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 10, the present invention provides an embroidery machine including 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 a transverse direction, the main shaft 810 being provided outside each head module 820, each head module 820 including at least one head. The machine head comprises a machine shell 100, a needle rod driving shaft 210, a guide rod 310, a needle rod driver 320, a needle rod cam 220, a connecting rod structure 400, a presser foot structure 500, a presser foot driving wheel 240 and a presser foot transmission mechanism 600, wherein the needle rod driving shaft 220 is rotatably and transversely arranged on the machine shell 100, a sub-driving transmission mechanism 900 is arranged between the needle rod driving shaft of each machine head module 820 and a main shaft 810, the guide rod 310 is vertically arranged on the machine shell, and the needle rod driver 320 is sleeved on the guide rod 310. The needle bar cam 220 and the presser foot driving wheel 240 are eccentrically sleeved on the needle bar driving shaft 220, and the connecting rod structure 400 is arranged between the needle bar cam 220 and the needle bar driver 320 and is used for driving the needle bar driver to move up and down. The presser foot structure 500 is disposed on the machine shell 100, and the presser foot transmission mechanism 600 is disposed between the presser foot driving wheel 240 and the presser foot mechanism 500 and is used for driving the presser foot mechanism to move up and down.

Because the main shaft is arranged outside the machine head module, the strength of the main shaft can be improved by increasing the outer diameter of the main shaft, the structural requirement of the embroidery machine is better met, and the change of the outer diameter of the main shaft can not influence the overall dimension of the machine head and the internal installation space of the machine head. When the main shaft needs to be replaced, only the related components of the driving transmission mechanism need to be detached from the main shaft, and the components on the head module do not need to be detached, so that the number of the components needing to be detached is greatly reduced, the maintenance difficulty is reduced, and the maintenance efficiency is improved.

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 main shaft 810 is arranged above the head modules 820, each head module 820 is provided with two heads which are arranged side by side along the transverse direction, each head is provided with a needle rod driving shaft 210, the sub-driving transmission mechanisms 900 and the head modules 820 are arranged in a one-to-one correspondence manner, the output end of each sub-driving transmission mechanism 900 is matched with one needle rod driving shaft 210 of the head module 820, and a transmission matching structure is arranged between the two needle rod driving shafts 210.

Referring to fig. 2, the driving gear 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. 3, 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 with 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.

Referring to fig. 4 to 7, the needle bar driving shaft 210 is rotatably mounted on the housing 100 through a bearing, and the guide rod 310 is erected on the front side of the housing 100. 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. The guide rods 310 and the needle bar drivers 320 in this embodiment are all arranged in four at equal intervals along the transverse direction, and the connecting rod structures 400 are arranged in two sets side by side along 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. 8 to 10, the presser foot mechanism 500 includes a presser foot bar 510, a presser foot 520, a plurality of presser foot lifting rods 530 and a presser foot driver 540, the presser foot bar 510 is horizontally disposed at the bottom of the housing 100, the plurality of presser feet 520 are disposed on the presser foot bar 510 at intervals in the horizontal direction, the presser foot lifting rods 530 are vertically disposed on the housing 100, and the bottom ends thereof are connected to the presser foot bar 510.

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. The presser foot drivers 540 are arranged 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 is positioned at the bottom of the needle rod driver 320, the right presser foot driver 540 is sleeved on the rightmost guide rod 310 and is positioned 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.

In order to lift the presser foot mechanism 500 when changing embroidery cloth, the machine head further includes a presser foot adjustment mechanism 700 provided on the machine case 100 and adjusting the vertical position of the presser foot mechanism 500 by the presser foot transmission mechanism 600.

The presser foot transmission mechanism 600 comprises 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 adjusting mechanism 700 comprises an adjusting motor, an adjusting transmission structure and a presser foot shaft 750, the presser foot shaft 750 is rotatably erected on the machine shell 100 through a bearing and is positioned below the needle rod driving shaft 210, and a pipe 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.

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 will be appreciated that the specific construction of the handpiece is not limited to that described above and shown in the drawings and that other suitable constructions may be used.

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.