An embroidery machine

Abstract

The present invention discloses an embroidery machine, belonging to the technical field of embroidery equipment, comprising an upper shaft and a main drive motor, and also comprising a plurality of head modules, wherein the main shaft is arranged outside each head module, and each head module comprises at least one head, and the head comprises a housing, a needle bar drive shaft, a guide rod, a needle bar driver, a needle bar cam, a connecting rod structure, a presser foot structure, a presser foot drive wheel and a presser foot transmission mechanism, wherein the connecting rod structure is arranged between the needle bar cam and the needle bar driver and is used to drive the needle bar 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 is used to drive the presser foot mechanism to move up and down. Since the main shaft is arranged outside the head module, the strength of the main shaft can be increased by increasing the outer diameter of the main shaft, so as to better meet the structural requirements of the embroidery machine. When the main shaft needs to be replaced, only the relevant components of the sub-drive transmission mechanism need to be disassembled from the main shaft, and there is no need to disassemble the components on the head module.

Description

Technical Field

[0001] The invention relates to the technical field of embroidery equipment, in particular to an embroidery machine. Background Art

[0002] With the advancement of science and technology, computer embroidery machines have become the main mechanical equipment in the embroidery industry. The head of the embroidery machine is an important structure of the embroidery machine. In the existing embroidery machine structure, a main shaft passes through all the heads to provide power for the needle bar drive and presser foot drive on each head. With the increase in market demand, the number of heads on embroidery machines continues to increase, so the rigidity requirements for the main shaft are also getting higher and higher. In the existing embroidery machine structure, due to the setting of the main shaft passing through the head, the size of the main shaft is limited, and the strength of the main shaft cannot meet the driving requirements of the embroidery machine well. If the strength of the main shaft is improved by increasing the outer diameter of the main shaft, in order to reserve enough installation space, the outer dimensions of the head also need to be increased accordingly, and the size of the embroidery machine will also increase accordingly, which is not conducive to controlling production costs. In addition, when the main shaft is deformed or broken and needs to be replaced, the needle bar drive mechanism and presser foot drive mechanism on all heads need to be detached from the main shaft, which makes maintenance more complicated. Summary of the invention

[0003] In order to solve the above-mentioned shortcomings and deficiencies in the prior art, the present invention provides an embroidery machine, which is beneficial to improving the strength of the main shaft and is also convenient for replacing the main shaft.

[0004] In order to achieve the above technical objectives, the present invention provides an embroidery machine, comprising a horizontally placed upper shaft and a main drive motor for driving the upper shaft, and also comprising a plurality of head modules arranged at intervals along the horizontal direction, the main shaft is arranged outside each head module, each head module comprises at least one head, the head comprises a casing, a needle bar drive shaft, a guide rod, a needle bar driver, a needle bar cam, a connecting rod structure, a presser foot structure, a presser foot drive wheel and a presser foot transmission mechanism, the needle bar drive shaft can be rotatably placed horizontally on the casing, a separate drive transmission mechanism is provided between the needle bar drive shaft and the main shaft of each head module, the guide rod is vertically placed on the casing, the needle bar driver is sleeved on the guide rod, the needle bar cam and the presser foot drive wheel are both eccentrically sleeved on the needle bar drive shaft, the connecting rod structure is arranged between the needle bar cam and the needle bar driver and is used to drive the needle bar driver to move up and down, the presser foot structure is arranged on the casing, and the presser foot transmission mechanism is arranged between the presser foot drive wheel and the presser foot mechanism and is used to drive the presser foot mechanism to move up and down.

[0005] Preferably, the presser foot mechanism includes a presser foot bar, a presser foot, a presser foot lifting rod and a presser foot driver, the presser foot bar is horizontally placed at the bottom of the casing, the presser foot is arranged on the presser foot bar and multiple presser foot are arranged at intervals along the lateral direction, the presser foot lifting rod is vertically placed on the casing and the bottom end is connected to the presser foot bar, and the presser foot driver is sleeved on the guide rod and connected to the presser foot lifting rod.

[0006] Preferably, the machine head includes a presser foot adjustment mechanism arranged on the casing, the presser foot transmission mechanism includes a presser foot three-eye connecting rod that can swing 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 can be rotatably placed horizontally on the casing, the rear end of the presser foot three-eye connecting rod is sleeved on the presser foot shaft, and the front end 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-eye connecting rod relative to the horizontal direction.

[0007] Preferably, 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 connecting rod is sleeved on the circumferential outer part of the adjustment cam.

[0008] Preferably, the presser foot transmission mechanism also includes 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, and the other end cooperates with the presser foot driving wheel. The two ends of the presser foot transmission rod are respectively connected to the presser foot driving rod and the presser foot three-eye connecting rod, and the two ends of the presser foot small connecting rod are respectively connected to the presser foot three-eye connecting rod and the presser foot lifting rod. The presser foot driving wheel drives the presser foot mechanism to move up and down through the presser foot driving rod, the presser foot transmission rod, the presser foot three-eye connecting rod and the presser foot small connecting rod.

[0009] Preferably, the guide rods and needle bar drivers are both arranged at 2N intervals in the transverse direction, where N is a positive integer and a multiple of 2, and N sets of connecting rod structures are arranged side by side in the transverse direction, and each set of connecting rod structures drives two corresponding needle bar drivers.

[0010] Preferably, the connecting rod structure includes a large connecting rod, a needle bar three-eye connecting rod and a small needle bar connecting rod. The large connecting rod is sleeved on the needle bar cam and is transmission connected to the needle bar three-eye connecting rod. The rear end of the needle bar three-eye connecting rod is rotatably connected to the casing, and the two ends of the small needle bar connecting rod are respectively rotatably connected to the needle bar three-eye connecting rod and the needle bar driver.

[0011] Preferably, the casing is provided with a horizontal intermediate shaft, the bottom end of the large connecting rod holds the intermediate shaft, the needle bar three-eye connecting rod is sleeved on the intermediate shaft, and the large connecting rod drives the needle bar three-eye connecting rod to swing up and down through the intermediate shaft.

[0012] Preferably, a limiting cam is provided on the circumferential outer wall of the needle bar cam, and a limiting plate with an outer diameter larger than the needle bar cam is provided on one axial side of the needle bar cam. The axial sides of the large connecting rod respectively contact the limiting cam and the limiting plate so that the large connecting rod is axially limited.

[0013] Preferably, the embroidery machine further comprises a lower shaft and a transmission box, wherein the lower shaft is horizontally placed at the bottom of the head module, and an inter-axial transmission structure between the main shaft and the lower shaft is provided in the transmission box, and the main shaft drives the lower shaft to rotate through the inter-axial transmission structure.

[0014] After adopting the above technical solution, the present invention has the following advantages:

[0015] 1. The embroidery machine provided by the present invention has a main shaft disposed outside the head module, and its strength can be improved by increasing the outer diameter of the main shaft, thereby better meeting the structural requirements of the embroidery machine. The change in the outer diameter of the main shaft will not affect the external dimensions of the head and the internal installation space of the head. When the main shaft needs to be replaced, only the relevant components of the split-drive transmission mechanism need to be disassembled from the main shaft, without the need to disassemble the components on the head module, which greatly reduces the number of components that need to be disassembled, and is conducive to reducing the difficulty of maintenance and improving maintenance efficiency.

[0016] The main shaft drives the needle bar driving shaft to rotate through the split-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. At the same time, 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, effectively meeting the driving requirements when the embroidery machine is working.

[0017] 2. The presser foot adjustment mechanism can adjust the vertical position of the presser foot mechanism through the presser foot transmission mechanism, which is convenient for lifting the presser foot mechanism when changing the embroidery cloth or stopping the machine, so as to avoid the presser foot mechanism interfering with the operation of changing the embroidery cloth. The rear end of the presser foot three-eye connecting rod is sleeved on the presser foot shaft through the adjustment cam. When the presser foot shaft rotates, the presser foot three-eye connecting rod is driven to swing up and down through the adjustment cam. The connection relationship between the presser foot three-eye connecting rod and the presser foot adjustment mechanism is reasonably set to ensure that the presser foot adjustment mechanism can drive the presser foot three-eye connecting rod to swing effectively when adjusting the vertical position of the presser foot mechanism, thereby ensuring that the presser foot three-eye connecting rod can drive the presser foot mechanism to be effectively lifted.

[0018] 3. The presser foot transmission mechanism adopts a connecting rod matching structure. When the presser foot driving wheel rotates with the needle bar driving shaft, the presser foot three-eye connecting rod is driven to swing up and down through the presser foot driving rod and the presser foot transmission rod. When the presser foot transmission rod swings up and down, the presser foot mechanism is driven to move up and down through the small presser foot connecting rod to achieve the driving purpose. The presser foot transmission mechanism has a simple structure and can be well integrated with the presser foot adjustment mechanism. It can meet the transmission requirements while also reasonably reducing the required installation space.

[0019] 4. Reasonably set the corresponding relationship between the connecting rod structure and the needle bar driver, appropriately control the number of connecting rod structures while meeting the driving requirements of multiple needle bar drivers, reduce the installation space required for the connecting rod structure, and help to reasonably simplify the internal structure of the machine head, and reserve sufficient installation space for other components of the machine head, so that the machine head can meet the structural requirements of multiple needle bar drives.

[0020] 5. The connecting rod structure adopts a structure in which a large connecting rod, a needle bar three-eye connecting rod, an intermediate shaft and a needle bar small connecting rod cooperate. When the needle bar cam rotates, the large connecting rod drives the intermediate shaft to move up and down, and the intermediate shaft drives the needle bar three-eye connecting rod to swing up and down. The needle bar three-eye connecting rod drives the needle bar driver to move up and down along the guide rod through the small connecting rod, thereby achieving the purpose of driving the corresponding needle bar to move up and down for embroidery. The components of the connecting rod structure are simple and can well meet the transmission requirements. The large connecting rod of each set of connecting rod structure drives the corresponding needle bar three-eye connecting rod to swing through the intermediate shaft, improving the movement stability of the intermediate shaft, which is conducive to improving the stability of the needle bar driver to move up and down through the needle bar small connecting rod of each set of connecting rod structure, and then it is conducive to improving the working stability of the needle bar.

[0021] 6. The two large connecting rods mounted on the same needle bar cam are limited in both directions in the axial direction through the limiting convex edge and the limiting plate, thereby improving the structural stability of the large connecting rod, which is beneficial to improving the stability of the connecting rod structure in driving the needle bar driver to move up and down.

[0022] 7. The main shaft drives the lower shaft to rotate through the inter-shaft transmission structure in the transmission box. The lower shaft is used to drive the relevant components in the shuttle box to work. The inter-shaft transmission structure preferably adopts a pulley transmission structure, which has a simple structure and can well meet the transmission requirements between the main shaft and the lower shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of an embroidery machine according to an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of a split drive transmission mechanism in an embroidery machine according to a first embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the transmission matching structure between two adjacent needle bar driving shafts in an embroidery machine according to an embodiment of the present invention;

[0026] Figure 4 It is a three-dimensional schematic diagram of the head of the embroidery machine in the first embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of a connecting rod structure and a needle bar driving shaft in an embroidery machine according to a first embodiment of the present invention;

[0028] Figure 6 Based Figure 5 Exploded view of some components in the middle;

[0029] Figure 7 It is an exploded schematic diagram of some components of the connecting rod structure, the guide rod, and the needle bar driver in the embroidery machine according to the first embodiment of the present invention;

[0030] Figure 8 Another three-dimensional schematic diagram of the head of the embroidery machine in the first embodiment of the present invention;

[0031] Fig. 9 It is a schematic diagram of a presser foot mechanism, a presser foot transmission mechanism and a presser foot adjustment mechanism of an embroidery machine head in an embodiment of the present invention;

[0032] Fig.10 for Fig. 9 Exploded view of some components in the middle.

[0033] In the figure, 100-casing, 210-needle bar driving shaft, 211-transmission convex block, 212-transmission groove, 220-needle bar cam, 221-limiting convex edge, 230-limiting plate, 240-presser foot driving wheel, 241-cam groove, 310-guide rod, 320-needle bar driver, 400-connecting rod structure, 410-large connecting rod, 420-needle bar three-eye connecting rod, 430-needle bar small connecting rod, 440-intermediate 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, 700-presser foot adjustment mechanism, 710-adjustment transmission shaft, 720-adjustment main pulley, 730-adjustment from the pulley, 740-adjustment transmission belt, 750-presser foot shaft, 760-adjustment cam, 770-pipe sleeve, 810-main shaft, 820-machine head module, 830-lower shaft, 840-transmission box, 851-second main pulley, 900-split drive mechanism, 910-first main pulley, 920-first from the pulley, 930-first transmission belt, 940-support, 941-through hole, 950-tensioning member. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0035] Embodiment 1

[0036] like Figures 1 to 10As shown, the present invention provides an embroidery machine, comprising a horizontally placed main shaft 810, a main drive motor for driving the main shaft 810, and a plurality of machine head modules 820 arranged at intervals in the horizontal direction, wherein the main shaft 810 is arranged outside each machine head module 820, and each machine head module 820 comprises at least one machine head. The machine head comprises a housing 100, a needle bar drive shaft 210, a guide rod 310, a needle bar driver 320, a needle bar cam 220, a connecting rod structure 400, a presser foot structure 500, a presser foot drive wheel 240, and a presser foot transmission mechanism 600, wherein the needle bar drive shaft 220 can be rotatably placed horizontally on the housing 100, a drive transmission mechanism 900 is arranged between the needle bar drive shaft and the main shaft 810 of each machine head module 820, the guide rod 310 is vertically placed on the housing, and the needle bar driver 320 is sleeved on the guide rod 310. The needle bar cam 220 and the presser foot driving wheel 240 are both 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 to drive the needle bar driver to move up and down. The presser foot structure 500 is arranged on the housing 100, and the presser foot transmission mechanism 600 is arranged between the presser foot driving wheel 240 and the presser foot mechanism 500 and is used to drive the presser foot mechanism to move up and down.

[0037] Since the main shaft is located outside the head module, its strength can be improved by increasing its outer diameter, which better meets the structural requirements of the embroidery machine. The change in the outer diameter of the main shaft will not affect the external dimensions of the head and the internal installation space of the head. When the main shaft needs to be replaced, it is only necessary to remove the relevant components of the split drive mechanism from the main shaft without removing the components on the head module, which greatly reduces the number of components that need to be removed, which is conducive to reducing the difficulty of maintenance and improving maintenance efficiency.

[0038] In this embodiment, the axial direction of the needle bar driving shaft 210 is arranged along the left-right direction shown in the figure, and the front-back direction shown in the figure is arranged horizontally and vertically with the left-right direction.

[0039] The main shaft 810 is arranged above the head module 820. Each head module 820 is provided with two heads arranged side by side in the horizontal direction. Each head is provided with a needle bar drive shaft 210. The split-drive transmission mechanism 900 is arranged in a one-to-one correspondence with the head module 820. The output end of each split-drive transmission mechanism 900 cooperates with one of the needle bar drive shafts 210 of the head module 820, and a transmission cooperation structure is provided between the two needle bar drive shafts 210.

[0040] Combination Figure 2 The split-drive transmission mechanism 900 includes a first main pulley 910, a first slave pulley 920 and a first transmission belt 930. The first main pulley 910 is sleeved on the main shaft 810, the first slave 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 main pulley 910 and the first slave pulley 920.

[0041] Combination Figure 3 , the transmission matching structure between two adjacent needle bar drive shafts 210, the transmission matching structure includes a transmission protrusion 211 and a transmission groove 212 that match each other, the transmission protrusion 211 and the transmission groove 212 are respectively arranged at the ends of the two adjacent needle bar drive shafts 210, and the transmission protrusion 211 is stuck in the transmission groove 212. The main shaft 810 drives one of the needle bar drive shafts 210 of the head module 820 to rotate through the split drive mechanism 900, and the needle bar drive shaft 210 then drives the other needle bar drive shafts 210 to rotate synchronously through the transmission matching structure. In this embodiment, the transmission protrusion 211 and the transmission groove 212 are both in the shape of a "one".

[0042] In order to improve the transmission effectiveness between the main shaft 810 and the needle bar driving shaft 210, each sub-drive transmission mechanism 900 also includes a tensioning structure for tensioning the first transmission belt 930, the tensioning structure includes a fixed support 940 and a tensioning member 950 rotatably arranged on the support 940, and the tensioning member 950 is in conflict 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 whose inner diameter is larger than the outer diameter of the main shaft 810, and the main shaft 810 is arranged 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 arranged on the support 940 through a connecting pin, the tensioning wheel is fixedly sleeved on the outside of the tensioning bearing, and the circumferential outer wall of the tensioning wheel is in conflict with the first transmission belt 930 to tension the first transmission belt 930.

[0043] The embroidery machine of this embodiment also includes a lower shaft 830 and a transmission box 840. The lower shaft 830 is horizontally placed at the bottom of the head module 820 and is used to drive components such as the shuttle box. An inter-axial transmission structure located between the main shaft 810 and the lower shaft 830 is provided in the transmission box 840. The main shaft 810 drives the lower shaft 830 to rotate through the inter-axial transmission structure.

[0044] The transmission box 840 is fixed on the frame. In order to improve the stability of transmission, two transmission boxes 840 are provided. The two transmission boxes 840 are respectively located at the left and right ends of the main shaft 810 and the lower shaft 830. The two transmission boxes 840 are provided with an inter-axial transmission structure. The left end of the main shaft 810 and the left end of the lower shaft 830 extend into the transmission box 840 on the left, and the right end of the main shaft 810 and the right end of the lower shaft 830 extend into the transmission box 840 on the right. The inter-axial transmission structure adopts a pulley structure, including a second main pulley 851, a second slave pulley and a second transmission belt. The second main pulley 851 is sleeved on the main shaft 810, the second slave pulley is sleeved on the lower shaft 830, and the second transmission belt is sleeved on the second main pulley 851 and the second slave pulley.

[0045] Combination Figures 4 to 7, the needle bar drive shaft 210 is rotatably mounted on the housing 100 through a bearing, and the guide rod 310 is vertically placed on the front side of the housing 100. Both the guide rod 310 and the needle bar driver 320 are provided with 2N numbers of guide rods 310 and needle bar drivers 320 at intervals in the horizontal direction, N is a positive integer and a multiple of 2, and the connecting rod structure 400 is provided with N sets of connecting rod structures 400 side by side in the horizontal direction, and each set of connecting rod structures 400 drives two corresponding needle bar drivers 320. In this embodiment, both the guide rod 310 and the needle bar driver 320 are provided with four numbers of guide rods 310 and needle bar drivers 320 at equal intervals in the horizontal direction, and two sets of connecting rod structures 400 are provided side by side in the horizontal direction. In order to meet the small space installation requirements of the machine head, one needle bar cam 220 is provided, and both connecting rod structures 400 cooperate with the same needle bar cam 220.

[0046] 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 housing 100. The 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 horizontal intermediate shaft 440 is provided on the housing 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 sleeved side by side on the circumferential outer side of the needle bar cam 220 in the horizontal direction and are axially limited. The lower ends of the two large connecting rods 410 are sleeved on the intermediate shaft 440 and are tightened to the intermediate shaft 440 by bolts. The rod body parts of the two large connecting rods are arranged in an "eight" shape. The rear end of the needle bar three-eye connecting rod 420 is hinged to the housing 100 through a positioning pin, and the approximate middle part of the needle bar three-eye connecting rod 420 is set on the intermediate shaft 440 through a bearing sleeve, and the large connecting rod 410 and the needle bar three-eye connecting rod 420 are connected by the intermediate shaft 440. Each connecting rod structure 400 is provided with two needle bar small connecting rods 430 located on the left and right sides of the needle bar three-eye connecting rod 420, one end of the needle bar small connecting rod 430 is hinged to the front end of the needle bar three-eye connecting rod 420 through a connecting pin, and the other end is hinged to the corresponding needle bar driver 320 through a connecting pin. When the needle bar driving shaft 210 rotates, the needle bar cam 220 is driven to rotate. 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 intermediate shaft 440, the needle bar three-eye connecting rod 420 and the needle bar small connecting rod 430. The needle bar driver 320 cooperates with the corresponding needle bar on the needle bar frame and drives the needle bar to move up and down, thereby achieving the purpose of driving multiple needle bars. Specifically, a set of connecting rod structures 400 on the left drives the two needle bar drivers 320 on the left, and a set of connecting rod structures 400 on the right drives the two needle bar drivers 320 on the right.

[0047] In order to limit the large connecting rod 410 axially, a limiting cam 221 is provided on the circumferential outer wall of the needle bar cam 220, and a limiting plate 230 is fixed to the needle bar cam 220 on the axial side away from the limiting cam 221. The outer diameter of the limiting plate 230 is larger than the outer diameter of the needle bar cam 220. One axial side of the two large connecting rods 410 contacts the limiting cam 221, and the other axial side contacts the limiting plate 230. The large connecting rod 410 mounted on the needle bar cam 220 is limited axially through the limiting cam 221 and the limiting plate 230.

[0048] like Figures 8 to 10 As shown, the presser foot mechanism 500 includes a presser foot bar 510, a presser foot 520, a presser foot lifting rod 530 and a presser foot driver 540. The presser foot bar 510 is horizontally placed at the bottom of the casing 100, the presser foot 520 is arranged on the presser foot bar 510 and multiple presser feet 520 are arranged at intervals along the horizontal direction, and the presser foot lifting rod 530 is vertically placed on the casing 100 and the bottom end is connected to the presser foot bar 510.

[0049] In this embodiment, the number of presser feet 520 corresponds to the number of needle bar drivers 320, that is, four presser feet 520 are arranged at equal intervals in the horizontal direction. In order to improve the stability of the up and down movement of the presser foot mechanism 500, two presser foot lifting rods 530 are arranged at intervals in the horizontal direction and correspond to the two ends of the presser foot strip 510. In order to prevent the presser foot mechanism 500 from interfering with the cooperation between the needle bar driver 320 and the needle bar, the left presser foot lifting rod 530 is located on the left side of the leftmost guide rod 310, and the right presser foot lifting rod 530 is located on the right side of the rightmost guide rod 310. The presser foot driver 540 is arranged in one-to-one correspondence with the presser foot lifting rod 530. The left presser foot driver 540 is sleeved on the leftmost guide rod 310 and located at the bottom of the needle bar driver 320. The right presser foot driver 540 is sleeved on the rightmost guide rod 310 and located at the bottom of the needle bar driver 320. The top of the left presser foot lifting rod 530 is fixedly connected to the left presser foot driver 540, and the top of the right presser foot lifting rod 530 is fixedly connected to the right presser foot driver 540. Correspondingly, the presser foot transmission mechanism 600 is provided with two sets of presser foot drivers 540 at intervals in the lateral direction and arranged in one-to-one correspondence with the two presser foot drivers 540.

[0050] In order to be able to lift the presser foot mechanism 500 when changing the embroidery cloth, the machine head also includes a presser foot adjustment mechanism 700 which is arranged on the housing 100 and adjusts the vertical position of the presser foot mechanism 500 through the presser foot transmission mechanism 600.

[0051] The presser foot transmission mechanism 600 includes a presser foot driving rod 610, a presser foot transmission rod 620, a presser foot three-eye 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 casing 100 through a bearing and is located below the needle bar driving shaft 210. The outer sleeve of the presser foot shaft 750 is provided with a pipe sleeve 770.

[0052] The front end of the presser foot driving rod 610 is provided with a rotatable linkage member 650, and the axial side wall of the presser foot driving wheel 240 is provided with a cam groove 241 that cooperates with the linkage member 650. The linkage member 650 is located in the cam groove 241, and the front end of the presser foot driving rod 610 cooperates with the presser foot driving wheel 240 through the cooperation of the linkage member and the cam groove. Specifically, the linkage member 650 includes a linkage bearing provided at the front end of the presser foot driving rod 610 through a connecting pin and a linkage wheel sleeved on the outside of the linkage bearing.

[0053] The rear end of the presser foot driving rod 610 is sleeved on the outside of the pipe sleeve 770 to realize a rotatable setting, the rear end of the presser foot three-eye connecting rod 630 is sleeved on the outside of the presser foot shaft 750, one end of the presser foot transmission rod 620 is hinged to the presser foot driving rod 610 through a connecting pin, and the other end is hinged to the approximately 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 to the front end of the presser foot three-eye connecting rod 630 through a connecting pin, and the other end is hinged to the corresponding presser foot driver 540 through a connecting pin. 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-eye connecting rod 630 to swing up and down through the linkage part 650, the presser foot driving rod 610 and the presser foot transmission rod 620. The presser foot three-eye 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. 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 presser foot 520 can cooperate with the needle bar to achieve the purpose of repeatedly pressing the upper thread when the embroidery machine is working.

[0054] In this embodiment, the adjustment transmission structure includes an adjustment transmission shaft 710, an adjustment main pulley 720, an adjustment slave pulley 730 and an adjustment transmission belt 740. The adjustment transmission shaft 710 is driven by an adjustment motor. The adjustment transmission shaft 710 is axially arranged horizontally and is arranged at the rear side of the housing 100. The adjustment main pulley 720 is sleeved on the adjustment transmission shaft 710. The adjustment slave pulley 730 is sleeved on the presser foot shaft 750. The adjustment transmission belt 740 is sleeved on the adjustment main pulley 720 and the adjustment slave pulley 730. The adjustment motor drives the adjustment transmission shaft 710 to rotate. The adjustment transmission shaft 710 drives the presser foot shaft 750 to rotate through the pulley structure. When the presser foot shaft 750 rotates, it can drive the presser foot three-eye connecting rod 630 to swing up and down. The presser foot adjustment mechanism 700 adjusts the vertical position of the presser foot mechanism 500 by adjusting the inclination angle between the presser foot three-eye connecting rod 630 and the horizontal direction. When the embroidery cloth needs to be replaced or the embroidery machine needs to be stopped, the presser foot mechanism 500 can be lifted by the presser foot adjustment mechanism 700 to prevent the presser foot mechanism 500 from interfering with the operation of replacing the embroidery cloth. After the operation is completed, the presser foot mechanism 500 is lowered by the presser foot adjustment mechanism 700, so that the presser foot mechanism 500 can reciprocate up and down under the drive of the presser foot transmission mechanism 600 to achieve the purpose of repeatedly pressing the upper thread.

[0055] In this embodiment, in order to increase the amplitude of the presser foot three-eye connecting rod 630 to swing up and down driven by the presser foot adjustment mechanism 700, the presser foot adjustment mechanism 700 also 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 on the outside of the adjustment cam 760 and is axially limited.

[0056] When the main drive motor is working, it drives the main shaft 810 to rotate, and the main shaft 810 drives the needle bar drive shaft 210 on each head module 820 to rotate through the split drive transmission mechanism 900. The needle bar drive shaft 210 drives the needle bar driver 320 to move up and down through the needle bar cam 220 and the connecting rod structure 440, and the needle bar driver 320 drives the needle bar that cooperates with it to move up and down to perform embroidery. At the same time, the needle bar drive 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 with the needle bar to achieve the purpose of repeatedly pressing the upper thread.

[0057] When the embroidery cloth needs to be replaced, the presser foot mechanism 500 can be lifted upwards 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 adjustment mechanism 700.

[0058] It is understandable that the specific number of the guide rod 310, needle bar driver 320, connecting rod structure 400 and needle bar cam 220 on each machine head is not limited to the above description and the drawings. If the transverse dimension of the machine head increases, the number of the guide rod 310 and the needle bar driver 320 can also be increased accordingly. For example, eight guide rods 310 and needle bar drivers 320 are arranged at equal intervals in the transverse direction. At this time, two needle bar cams 220 are sleeved on the needle bar drive shaft 210, and four connecting rod structures 400 are arranged. The large connecting rods 410 of the two connecting rod structures 400 on the left are sleeved on the needle bar cam 220 on the left, and the large connecting rods 410 of the two connecting rod structures 400 on the right are sleeved on the needle bar cam 220 on the right. The intermediate shaft 440 can be set to one, and the lower ends of the large connecting rods 410 of the four connecting rod structures 400 are all tightly holding the intermediate shaft 440. Of course, two intermediate shafts 440 may be arranged at intervals in the transverse direction, the left intermediate shaft 440 cooperates with the large connecting rods 410 of the two sets of connecting rod structures 400 on the left, and the right intermediate shaft 440 cooperates with the large connecting rods 410 of the two sets of connecting rod structures 400 on the right.

[0059] It can be understood that the number of presser feet 520 in the presser foot mechanism 500 is consistent with the number of needle bar drivers 320, that is, the presser feet and the needle bar drivers are arranged in a one-to-one correspondence.

[0060] It is understandable that another limiting plate may be used to replace the limiting protrusion 221 on the circumferential outer wall of the needle bar cam 220 to limit the large connecting rod 410 axially. In this case, the two limiting plates are respectively fixed on both sides of the axial direction of the needle bar cam 220.

[0061] It is understandable that the specific shapes of the transmission protrusion 211 and the transmission groove 212 are not limited to the "I" shape as described above and shown in the drawings, and can also be set to other reasonable shapes such as a "X" shape and a "M" shape.

[0062] It is understandable that the specific number of heads in each head module 820 is not limited to the two as described above and shown in the drawings, but may also be set to one, three or other reasonable numbers.

[0063] It is understandable that the specific structure of the nose is not limited to the above description and drawings, and other reasonable structures may also be adopted.

[0064] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art may make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. An embroidery machine, comprising a horizontally placed upper shaft and a main drive motor for driving the upper shaft, characterized in that: It also includes a plurality of head modules arranged at intervals in the transverse direction, the main shaft is arranged outside each head module, each head module includes at least one head, the head includes a casing, a needle bar driving shaft, a guide rod, a needle bar driver, a needle bar cam, a connecting rod structure, a presser foot structure, a presser foot driving wheel and a presser foot transmission mechanism, the needle bar driving shaft can be rotatably placed horizontally on the casing, a split-drive transmission mechanism is arranged between the needle bar driving shaft and the main shaft of each head module, the guide rod is vertically arranged on the casing, the needle bar driver is sleeved on the guide rod, the needle bar cam and the presser foot driving wheel are eccentrically sleeved on the needle bar driving shaft, the connecting rod structure is arranged between the needle bar cam and the needle bar driver and is used to drive the needle bar driver to move up and down, the presser foot structure is arranged on the casing, and the presser foot transmission mechanism is arranged between the presser foot driving wheel and the presser foot mechanism and is used to drive the presser foot mechanism to move up and down; The presser foot mechanism comprises a presser foot bar, a presser foot, a presser foot lifting rod and a presser foot driver, wherein the presser foot bar is horizontally arranged at the bottom of the housing, the presser foot is arranged on the presser foot bar and multiple presser feet are arranged at intervals along the horizontal direction, the presser foot lifting rod is vertically arranged on the housing and the bottom end is connected to the presser foot bar, and the presser foot driver is sleeved on the guide rod and connected to the presser foot lifting rod; The connecting rod structure includes a large connecting rod, a needle bar three-eye connecting rod and a small needle bar connecting rod. The large connecting rod is sleeved on the needle bar cam and is transmission-connected to the needle bar three-eye connecting rod. The rear end of the needle bar three-eye connecting rod is rotationally connected to the casing, and the two ends of the small needle bar connecting rod are rotationally connected to the needle bar three-eye connecting rod and the needle bar driver respectively.

2. An embroidery machine according to claim 1, characterized in that: The machine head includes a presser foot adjustment mechanism arranged on the casing, the presser foot transmission mechanism includes a presser foot three-eye connecting rod that can swing 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 can be rotatably placed horizontally on the casing, the rear end of the presser foot three-eye connecting rod is sleeved on the presser foot shaft, and the front end 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-eye connecting rod relative to the horizontal direction.

3. An embroidery machine according to claim 2, characterized in that: The presser foot adjustment mechanism also includes an adjustment cam eccentrically sleeved on the presser foot shaft, and the rear end of the presser foot three-eye connecting rod is sleeved on the circumferential outer part of the adjustment cam.

4. The embroidery machine according to claim 1, characterized in that: The presser foot transmission mechanism also includes 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, and the other end cooperates with the presser foot driving wheel. The two ends of the presser foot transmission rod are respectively connected to the presser foot driving rod and the presser foot three-eye connecting rod, and the two ends of the presser foot small connecting rod are respectively connected to the presser foot three-eye connecting rod and the presser foot lifting rod. The presser foot driving wheel drives the presser foot mechanism to move up and down through the presser foot driving rod, the presser foot transmission rod, the presser foot three-eye connecting rod and the presser foot small connecting rod.

5. The embroidery machine according to claim 1, characterized in that: The guide rods and needle bar drivers are both arranged at intervals of 2N in the transverse direction, where N is a positive integer and a multiple of 2. N sets of connecting rod structures are arranged side by side in the transverse direction, and each set of connecting rod structures drives two corresponding needle bar drivers.

6. The embroidery machine according to claim 1, characterized in that: The casing is provided with a horizontal intermediate shaft, the bottom end of the large connecting rod holds the intermediate shaft tightly, the needle bar three-eye connecting rod is sleeved on the intermediate shaft, and the large connecting rod drives the needle bar three-eye connecting rod to swing up and down through the intermediate shaft.

7. An embroidery machine according to claim 1, characterized in that: A limiting cam is provided on the circumferential outer wall of the needle bar cam, and a limiting plate with an outer diameter larger than the needle bar cam is provided on one axial side of the needle bar cam. The axial sides of the large connecting rod respectively contact the limiting cam and the limiting plate to limit the large connecting rod axially.

8. An embroidery machine according to claim 1, characterized in that: The embroidery machine also includes a lower shaft and a transmission box. The lower shaft is horizontally placed at the bottom of the head module. An inter-axial transmission structure located between the main shaft and the lower shaft is arranged in the transmission box. The main shaft drives the lower shaft to rotate through the inter-axial transmission structure.

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